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<title>Seven-segment display</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Seven-segment display</span></span>

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<p>A <b>seven-segment display</b> is a <a href="Display_device" title="Display device">display device</a> for <a href="Arabic_numerals" title="Arabic numerals">Arabic numerals</a>, less complex than a device that can show more characters such as <a href="Dot_matrix_display" class="mw-redirect" title="Dot matrix display">dot matrix displays</a>. Seven-segment displays are widely used in <a href="Digital_clock" title="Digital clock">digital clocks</a>, <a href="Elevator" title="Elevator">elevators</a>, electronic meters, basic calculators, and other electronic devices that display numerical information.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>

<p>Seven-segment representation of figures can be found in <a href="Patent" title="Patent">patents</a> as early as 1903 (in <span><a rel="nofollow" class="external text" href="https://patents.google.com/patent/US1126641">U.S. patent 1,126,641</a></span>), when Carl Kinsley invented a method of telegraphically transmitting letters and numbers and having them printed on tape in a segmented format. In 1908, F. W. Wood invented an 8-segment display, which displayed the number 4 using a diagonal bar (<span><a rel="nofollow" class="external text" href="https://patents.google.com/patent/US974943">U.S. patent 974,943</a></span>). In 1910, a seven-segment display illuminated by incandescent bulbs was used on a power-plant boiler room signal panel.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> They were also used to show the dialed telephone number to operators during the transition from manual to automatic telephone dialing.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> They did not achieve widespread use until the advent of <a href="Light-emitting_diode" title="Light-emitting diode">LEDs</a> in the 1970s.

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<p>Some early seven-segment displays used incandescent filaments in an evacuated bulb; they are also known as numitrons.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> A variation (minitrons) made use of an evacuated <a href="Potting_(electronics)" title="Potting (electronics)">potted</a> box. Minitrons are filament segment displays that are housed in DIP (<a href="Dual_in-line_package" title="Dual in-line package">dual in-line package</a>) packages like modern LED segment displays. They may have up to <a href="Sixteen-segment_display" title="Sixteen-segment display">16 segments</a>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> There were also segment displays that used small incandescent light bulbs instead of LEDs or incandescent filaments. These worked similarly to modern LED segment displays.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup>

</p><p><a href="Vacuum_fluorescent_display" title="Vacuum fluorescent display">Vacuum fluorescent display</a> versions were also used in the 1970s.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup>

</p><p>Many early (c. 1970s) LED seven-segment displays had each digit built on a single <a href="Die_(integrated_circuit)" title="Die (integrated circuit)">die</a>. This made the digits very small. Some included magnifying lenses in the design to try to make the digits more legible.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> Other designs used 1 or 2 dies for every segment of the display.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup>

</p><p>The seven-segment pattern is sometimes used in posters or tags, where the user either applies color to pre-printed segments, or applies color through a seven-segment digit <a href="Stencil" title="Stencil">template</a>, to compose figures such as product prices or telephone numbers.

</p><p>For many applications, dot-matrix <a href="Liquid-crystal_display" title="Liquid-crystal display">liquid-crystal displays</a> (LCDs) have largely superseded LED displays in general, though even in LCDs, seven-segment displays are common. Unlike LEDs, the shapes of elements in an LCD panel are arbitrary since they are formed on the display by <a href="Photolithography" title="Photolithography">photolithography</a>. In contrast, the shapes of LED segments tend to be simple <a href="Rectangle" title="Rectangle">rectangles</a>, because they have to be physically moulded to shape, which makes it difficult to form more complex shapes than the segments of seven-segment displays. However, the easy recognition of seven-segment displays, and the comparatively high visual <a href="Contrast_(vision)" title="Contrast (vision)">contrast</a> obtained by such displays relative to dot-matrix digits, makes seven-segment multiple-digit LCD screens very common on basic <a href="Calculator" title="Calculator">calculators</a>.

</p><p>The seven-segment display has inspired <a href="Type_design" title="Type design">type designers</a> to produce typefaces reminiscent of that display (but more legible), such as <a href="New_Alphabet" title="New Alphabet">New Alphabet</a>, "DB LCD Temp", "ION B", etc.

</p><p>Seven-segment displays, which use a restricted range of letters that look like (upside-down) digits, are commonly used by school children to form words and phrases using a technique known as "<a href="Calculator_spelling" title="Calculator spelling">calculator spelling</a>."

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</style><div class="mod-gallery mod-gallery-default mod-gallery-center"><div class="main"><div><ul class="nochecker bordered-images whitebg gallery mw-gallery-traditional">

<div class="gallerytext"><a href="Gas_station" class="mw-redirect" title="Gas station">Gas station</a> price display</div>

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<div class="gallerytext"><a href="Calculator" title="Calculator">Calculator</a> that has a tail on the "7" digit</div>

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<div class="gallerytext"><a href="Apollo_Guidance_Computer" title="Apollo Guidance Computer">Apollo Guidance Computer</a> control panel reproduction</div>

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<div class="gallerytext">Marantz CD63SE <a href="CD_player" title="CD player">CD player</a> with a <a href="Vacuum_fluorescent_display" title="Vacuum fluorescent display">vacuum fluorescent display</a> in test mode</div>

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<div class="gallerytext">Marantz CC-45 <a href="CD_player" title="CD player">CD player</a> display</div>

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<div class="mw-heading mw-heading2"><h2 id="Implementations">Implementations</h2></div>

<p>Seven-segment displays may use a <a href="Liquid-crystal_display" title="Liquid-crystal display">liquid-crystal display</a> (LCD), a <a href="Light-emitting_diode" title="Light-emitting diode">light-emitting diode</a> (LED) for each segment, an <a href="Electrochromic_devices" class="mw-redirect" title="Electrochromic devices">electrochromic display</a>, or other light-generating or -controlling techniques such as <a href="Cold_cathode" title="Cold cathode">cold cathode</a> gas discharge (neon) (<a rel="nofollow" class="external text" href="https://www.panaplex.co.uk/">Panaplex</a>), <a href="Vacuum_fluorescent_display" title="Vacuum fluorescent display">vacuum fluorescent</a> (VFD), <a href="Incandescent_lamp" class="mw-redirect" title="Incandescent lamp">incandescent filaments</a> (Numitron), and others. For <a href="Gasoline" title="Gasoline">gasoline</a> price totems and other large signs, electromechanical seven-segment displays made up of electromagnetically flipped light-reflecting segments are still commonly used. A precursor to the 7-segment display in the 1950s through the 1970s was the cold-cathode, neon-lamp-like <a href="Nixie_tube" title="Nixie tube">nixie tube</a>. Starting in 1970, <a href="RCA" title="RCA">RCA</a> sold a display device known as the <i><style data-mw-deduplicate="TemplateStyles:r1238216509">

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</style><span class="vanchor"><span class="vanchor-text">Numitron</span></span></i> that used incandescent filaments arranged into a seven-segment display.<sup id="cite_ref-Numintron_1974_14-0" class="reference"><a href="#cite_note-Numintron_1974-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> In USSR, the first electronic calculator "Vega", which was produced from 1964, contains 20 decimal digits with seven-segment <a href="Electroluminescent_display" title="Electroluminescent display">electroluminescent display</a>.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup>

</p><p>In a simple LED package, typically all of the <a href="Cathode" title="Cathode">cathodes</a> (negative terminals) or all of the <a href="Anode" title="Anode">anodes</a> (positive terminals) of the segment LEDs are connected and brought out to a common pin; this is referred to as a "common cathode" or "common anode" device.<sup id="cite_ref-Westermann_Tabellen_16-0" class="reference"><a href="#cite_note-Westermann_Tabellen-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> Hence a 7 segment plus decimal point package will only require nine pins, though commercial products typically contain more pins, and/or spaces where pins would go, in order to match standard <a href="Integrated_circuit" title="Integrated circuit">IC</a> sockets. Integrated displays also exist, with single or multiple digits. Some of these integrated displays incorporate their own internal <a href="Binary_decoder" title="Binary decoder">decoder</a>, though most do not: each individual LED is brought out to a connecting pin as described.

</p><p>Multiple-digit LED displays as used in pocket calculators and similar devices used <a href="Multiplexed_display" title="Multiplexed display">multiplexed displays</a> to reduce the number of I/O pins required to control the display. For example, all the anodes of the A segments of each digit position would be connected together and to a <a href="Driver_circuit" title="Driver circuit">driver circuit</a> pin, while the cathodes of all segments for each digit would be connected. To operate any particular segment of any digit, the controlling integrated circuit would turn on the cathode driver for the selected digit, and the anode drivers for the desired segments; then after a short blanking interval the next digit would be selected and new segments lit, in a sequential fashion. In this manner an eight digit display with seven segments and a decimal point would require only 8 cathode drivers and 8 anode drivers, instead of sixty-four drivers and IC pins.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> Often in pocket calculators the digit drive lines would be used to scan the keyboard as well, providing further savings; however, pressing multiple keys at once would produce odd results on the multiplexed display.

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<div class="gallerytext">A <a href="Multiplexing" title="Multiplexing">multiplexed</a> 4-digit, seven-segment display with only 12 pins</div>

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<div class="gallerytext">A 4-digit display scanning by columns to make the number 1.234</div>

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<div class="gallerytext">X-Ray of an 8-digit 7-segment multiplexed LED display from a 1970s calculator</div>

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<div class="mw-heading mw-heading2"><h2 id="Characters">Characters</h2></div>

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</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="Seven-segment_display_character_representations" title="Seven-segment display character representations">Seven-segment display character representations</a></div>

<p>The seven segments are arranged as a rectangle, with two vertical segments on each side and one horizontal segment each at the top, middle, and bottom. Often the rectangle is <i><a href="Oblique_type" title="Oblique type">oblique</a></i> (slanted), which may aid readability. In most applications, the segments are of nearly uniform shape and size (usually elongated <a href="Hexagon" title="Hexagon">hexagons</a>, though <a href="Trapezoid" title="Trapezoid">trapezoids</a> and <a href="Rectangle" title="Rectangle">rectangles</a> can also be used); though in the case of <a href="Adding_machine" title="Adding machine">adding machines</a>, the vertical segments are longer and more oddly shaped at the ends, to try to make them more easily readable. The seven elements of the display can be lit in different combinations to represent each of the <a href="Arabic_numerals" title="Arabic numerals">Arabic numerals</a>.

</p><p>The individual segments are referred to by the letters "a" to "g", and an optional <a href="Decimal_point" class="mw-redirect" title="Decimal point">decimal point</a> (an "eighth segment", referred to as DP) is sometimes used for the display of non-integer numbers.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Westermann_Tabellen_16-1" class="reference"><a href="#cite_note-Westermann_Tabellen-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> A single byte can encode the full state of a seven-segment display, including the decimal point. The most popular bit encodings are <i>gfedcba</i> and <i>abcdefg</i>. In the <i>gfedcba</i> representation, a byte value of 0x06 would turn on segments "c" and "b", which would display a "1".

</p>

<div class="mw-heading mw-heading3"><h3 id="Decimal">Decimal</h3></div>

<p>The <a href="Numerical_digit" title="Numerical digit">numerical digits</a> 0 to 9 are the most common characters displayed on seven-segment displays. The most common patterns used for each of these are:<sup id="cite_ref-Nührmann_1991_20-0" class="reference"><a href="#cite_note-Nührmann_1991-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup>

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<p>Alternative patterns: The numeral 1 may be represented with the left segments, the numerals 6 and 9 may be represented without a "tail", and the numeral 7 represented <i>with</i> a 'tail':<sup id="cite_ref-Casio_fx-50F_calculator_21-0" class="reference"><a href="#cite_note-Casio_fx-50F_calculator-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup>

</p>

<p>In Unicode 13.0, 10 codepoints had been given for segmented digits 0–9 in the <a href="Symbols_for_Legacy_Computing" title="Symbols for Legacy Computing">Symbols for Legacy Computing</a> block, to replicate early computer fonts that included seven-segment versions of the digits.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> The official reference shows the less-common four-segment "7".

</p>

<div class="mw-heading mw-heading3"><h3 id="Hexadecimal">Hexadecimal</h3></div>

<p>The <a href="Binary-coded_decimal" title="Binary-coded decimal">binary-coded decimal</a> (BCD) 0 to 9 digit values require four binary bits to hold their values. Since four bits (2<sup>4</sup>) can hold 16 values, this means <a href="Hexadecimal" title="Hexadecimal">hexadecimal</a> (hex) digits can be represented by four bits too.<sup id="cite_ref-Maxim_2008_MAX6955_23-0" class="reference"><a href="#cite_note-Maxim_2008_MAX6955-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> Since there are a limited number of segments in seven-segment displays, a couple of the hexadecimal digits are required to be displayed as lowercase letters, otherwise the uppercase letter "B" would be the same as the digit "8", and the uppercase letter "D" would be the same as the digit "0".<sup id="cite_ref-Maxim_24-0" class="reference"><a href="#cite_note-Maxim-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-TI_1974_SR-22_25-0" class="reference"><a href="#cite_note-TI_1974_SR-22-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-TI_1977_Programmer_26-0" class="reference"><a href="#cite_note-TI_1977_Programmer-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-TI_1981_LCD_Programmer_27-0" class="reference"><a href="#cite_note-TI_1981_LCD_Programmer-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> The digit "6" must also be displayed with the topmost segment as <span typeof="mw:File"></span> to avoid ambiguity with the letter "b".

</p>

<p>Early decoder ICs often produced unintuitive patterns or duplicates of digits for 10-15,<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> as they were designed to use as few gates as possible and only required to produce 0-9.

</p>

<div class="mw-heading mw-heading3"><h3 id="Letters">Letters</h3></div>

<p>Many letters of the <a href="Latin_alphabet" title="Latin alphabet">Latin alphabet</a> can be reasonably implemented on a seven-segment display. Though not every letter is available, it is possible to create many useful words. By careful choice of words, one can sometimes work around unavailable letters. Uppercase letters "I", "O", "S", "Z" conflict with the common seven-segment representation of digits "1", "0", 5", "2", and the lowercase letter "g" with digit "9". Upper case <span class="serif-fonts" style="font-family: 'Georgia Pro', Georgia, 'DejaVu Serif', Times, 'Times New Roman', FreeSerif, 'DejaVu Math TeX', 'URW Bookman L', serif;">I</span> could be put on the left (as lower-case L is shown here) but this is not often done. Lowercase 'b' and 'q' are identical to the alternate numerical digits '6' and '9'.

</p>

<caption>Latin alphabet

</caption>

<th>Z

</th></tr>

<tr>

<th>Upper

</th>

</td></tr>

<tr>

<th>Lower

</th>

<td>

</td></tr></tbody></table></dd></dl>

<p>The following are some English word examples seen on actual electronic equipment (first line appeared on some <a href="CD_player" title="CD player">CD players</a>):

</p>

<p>There are also fourteen- and sixteen-segment displays (for full <a href="https://en.wiktionary.org/wiki/alphanumeric" class="extiw external" title="wikt:alphanumeric">alphanumerics</a>); however, these have mostly been replaced by <a href="Dot-matrix_display" title="Dot-matrix display">dot matrix displays</a>. 22-segment displays capable of displaying the full <a href="ASCII" title="ASCII">ASCII</a> character set<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> were briefly available in the early 1980s but did not prove popular.

</p>

<ul><li><a href="Eight-segment_display" title="Eight-segment display">Eight-segment display</a></li>

<li><a href="Nine-segment_display" title="Nine-segment display">Nine-segment display</a></li>

<li><a href="Fourteen-segment_display" title="Fourteen-segment display">Fourteen-segment display</a></li>

<li><a href="Sixteen-segment_display" title="Sixteen-segment display">Sixteen-segment display</a></li>

<li><a href="Dot_matrix_display" class="mw-redirect" title="Dot matrix display">Dot matrix display</a></li>

<li><a href="Nixie_tube" title="Nixie tube">Nixie tube</a> display</li>

<li><a href="Vacuum_fluorescent_display" title="Vacuum fluorescent display">Vacuum fluorescent display</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120404071304/https://sharedserver.rsd17.org/teacherwebpages/ryankish/Shared%20Documents/2.3%20Date%20of%20Birth%20machine/Seven-segment%20displays.ppt">"Seven Segment Displays"</a>. Archived from <a rel="nofollow" class="external text" href="https://sharedserver.rsd17.org/teacherwebpages/ryankish/Shared%20Documents/2.3%20Date%20of%20Birth%20machine/Seven-segment%20displays.ppt">the original</a> on 2012-04-04.</cite></span>

</li>

<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite id="CITEREFRogers1910" class="citation journal cs1">Rogers, Warren O. (1910-02-01). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=0sIfAQAAMAAJ&pg=PA204">"Power Plant Signalling System"</a>. <i>Power and the Engineer</i>. <b>32</b> (5): <span class="nowrap">204–</span>206. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140331102649/http://books.google.com/books?id=0sIfAQAAMAAJ&pg=PA204">Archived</a> from the original on 2014-03-31<span class="reference-accessdate">. Retrieved <span class="nowrap">2016-10-06</span></span>.</cite></span>

</li>

<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><cite id="CITEREFClark1929" class="citation journal cs1">Clark, E. H. (December 1929). <a rel="nofollow" class="external text" href="http://www.americanradiohistory.com/Archive-Bell-Laboratories-Record/20s/Bell-Laboratories-Record-1929-12.pdf">"Evolution of the Call-Indicator System"</a> <span class="cs1-format">(PDF)</span>. <i>Bell Laboratories Record</i>. <b>8</b> (5): <span class="nowrap">171–</span>173. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20240413141700/http://www.americanradiohistory.com/Archive-Bell-Laboratories-Record/20s/Bell-Laboratories-Record-1929-12.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2024-04-13<span class="reference-accessdate">. Retrieved <span class="nowrap">2015-12-19</span></span>.</cite></span>

</li>

<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.industrialalchemy.org/articleview.php?item=65">"IEE Apollo DA-2110 Numitron Tube (DA2110, RCA DR-2110) - Industrial Alchemy"</a>. <i>industrialalchemy.org</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200915201814/http://www.industrialalchemy.org/articleview.php?item=65">Archived</a> from the original on 2020-09-15<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-15</span></span>.</cite></span>

</li>

<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.industrialalchemy.org/articleview.php?item=777">"Wamco KW-105AL Alphanumeric Minitron Display - Industrial Alchemy"</a>. <i>industrialalchemy.org</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200915204740/http://www.industrialalchemy.org/articleview.php?item=777">Archived</a> from the original on 2020-09-15<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-15</span></span>.</cite></span>

</li>

<li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://hackaday.com/2011/12/21/numitron-tube-tutorial/">"Numitron Tube Tutorial"</a>. 2011-12-21. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180925230213/https://hackaday.com/2011/12/21/numitron-tube-tutorial/">Archived</a> from the original on 2018-09-25<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-14</span></span>.</cite></span>

</li>

<li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><cite class="citation web cs1 cs1-prop-unfit"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20180217005226/http://www.decadecounter.com/vta/tubepage.php?item=10">"Incandescent Displays – the Vintage Technology Association"</a>. Archived from the original on 2018-02-17<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-14</span></span>.</cite></span>

</li>

<li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.industrialalchemy.org/articleview.php?item=845">"Alco MSM-5A Mosaic Indicator Incandescent Display - Industrial Alchemy"</a>. <i>industrialalchemy.org</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200915211829/http://www.industrialalchemy.org/articleview.php?item=845">Archived</a> from the original on 2020-09-15<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-15</span></span>.</cite></span>

</li>

<li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><cite class="citation web cs1 cs1-prop-unfit"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160611100808/http://www.decadecounter.com/vta/articleview.php?item=94">"General Electric Y1938 – the Vintage Technology Association"</a>. Archived from the original on 2016-06-11<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-11-13</span></span>.</cite></span>

</li>

<li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.industrialalchemy.org/articleview.php?item=3081">"Litronix Surface Mount Wristwatch LED Display – Industrial Alchemy"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180831152511/http://industrialalchemy.org/articleview.php?item=3081">Archived</a> from the original on 2018-08-31<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-16</span></span>.</cite></span>

</li>

<li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.industrialalchemy.org/articleview.php?item=787">"Litronix DL330 Series LED Displays (Siemens DL340M) - Industrial Alchemy"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20180304050126/https://www.industrialalchemy.org/articleview.php?item=787">Archived</a> from the original on 2018-03-04<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-04-16</span></span>.</cite></span>

</li>

<li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.industrialalchemy.org/articleview.php?item=1167">"Soviet AL304V Surface Mount LED - Industrial Alchemy"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220928122454/https://www.industrialalchemy.org/articleview.php?item=1167">Archived</a> from the original on 2022-09-28<span class="reference-accessdate">. Retrieved <span class="nowrap">2024-01-21</span></span>.</cite></span>

</li>

<li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.industrialalchemy.org/articleview.php?item=773">"Texas Instruments TIA8447 LED Display - Industrial Alchemy"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220529091352/https://www.industrialalchemy.org/articleview.php?item=773">Archived</a> from the original on 2022-05-29<span class="reference-accessdate">. Retrieved <span class="nowrap">2024-01-21</span></span>.</cite></span>

</li>

<li id="cite_note-Numintron_1974-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-Numintron_1974_14-0">^</a></b></span> <span class="reference-text"><cite class="citation journal cs1"><a class="external text external" href="https://commons.wikimedia.org/wiki/File:RCA_Numitron_display_device_June_1974.jpg">"Advert for RCA NUMITRON Display Devices"</a>. <i>Electronic Design</i>. <b>22</b> (12). Hayden: 163. 1974-06-07. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140331112707/http://commons.wikimedia.org/wiki/File:RCA_Numitron_display_device_June_1974.jpg">Archived</a> from the original on 2014-03-31<span class="reference-accessdate">. Retrieved <span class="nowrap">2012-06-22</span></span>.</cite></span>

</li>

<li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20100929142141/http://www.taswegian.com/MOSCOW/vega.html">"Museum of Soviet Calculators - VEGA"</a>. 2010-09-29. Archived from <a rel="nofollow" class="external text" href="http://www.taswegian.com/MOSCOW/vega.html">the original</a> on 2010-09-29.</cite></span>

</li>

<li id="cite_note-Westermann_Tabellen-16"><span class="mw-cite-backlink">^ <a href="#cite_ref-Westermann_Tabellen_16-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Westermann_Tabellen_16-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><cite class="citation book cs1"><i>Elektrotechnik Tabellen Kommunikationselektronik</i> (3rd ed.). Braunschweig, Germany: <a href="Westermann_Verlag" title="Westermann Verlag">Westermann Verlag</a>. 1999. p. 110. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>3142250379</bdi>.</cite></span>

</li>

<li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text">e.g. <a rel="nofollow" class="external text" href="http://pdf1.alldatasheet.com/datasheet-pdf/view/170106/VISHAY/TDCR1050M.html">DCR 1050m</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140331105445/http://pdf1.alldatasheet.com/datasheet-pdf/view/170106/VISHAY/TDCR1050M.html">Archived</a> 31 March 2014 at the <a href="Wayback_Machine" title="Wayback Machine">Wayback Machine</a></span>

</li>

<li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20120105025754/http://www.sentex.ca/~mec1995//tutorial/7seg/7seg.html">"Seven Segment Displays"</a>. Archived from <a rel="nofollow" class="external text" href="http://www.sentex.ca/~mec1995/tutorial/7seg/7seg.html">the original</a> on 2012-01-05<span class="reference-accessdate">. Retrieved <span class="nowrap">2012-11-14</span></span>.</cite></span>

</li>

<li id="cite_note-elektor-UK_1981-72-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-elektor-UK_1981-72_19-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFDiehlDe_Mulder1981" class="citation magazine cs1">Diehl, H. P.; De Mulder, H. D. (April 1981). <a rel="nofollow" class="external text" href="https://worldradiohistory.com/UK/Elektor/80s/Elektor-1981-04.pdf">"junior cookbook: a few healthy recipes to keep your computer in shape"</a> <span class="cs1-format">(PDF)</span>. <i><a href="Elektor" title="Elektor">elektor</a> (UK) – up-to-date electronics for lab and leisure</i>. Vol. 1981, no. 72. pp. 4-28 – 4-31 [4-30 Figure 4]. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200703164044/https://worldradiohistory.com/UK/Elektor/80s/Elektor-1981-04.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2020-07-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-07-03</span></span>.</cite></span>

</li>

<li id="cite_note-Nührmann_1991-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-Nührmann_1991_20-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFNührmann1981" class="citation book cs1 cs1-prop-location-test cs1-prop-foreign-lang-source">Nührmann, Dieter (1981). Written at Achim, Bremen, Germany. <i>Werkbuch Elektronik</i> (in German) (3 ed.). Munich, Germany: <a href="Franzis-Verlag_GmbH" class="mw-redirect" title="Franzis-Verlag GmbH">Franzis-Verlag GmbH</a>. p. 695. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>3-7723-6543-4</bdi>.</cite></span>

</li>

<li id="cite_note-Casio_fx-50F_calculator-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-Casio_fx-50F_calculator_21-0">^</a></b></span> <span class="reference-text">For example the fx-50F calculator from <a href="Casio" title="Casio">Casio</a> and other models from the same manufacturer.</span>

</li>

<li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.unicode.org/charts/PDF/U1FB00.pdf">Official Unicode Consortium code chart</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200605060757/http://www.unicode.org/charts/PDF/U1FB00.pdf">Archived</a> 2020-06-05 at the <a href="Wayback_Machine" title="Wayback Machine">Wayback Machine</a> (PDF)</span>

</li>

<li id="cite_note-Maxim_2008_MAX6955-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-Maxim_2008_MAX6955_23-0">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://datasheets.maximintegrated.com/en/ds/MAX6955.pdf">"Application Note 3210 – Quick-Start: Driving 7-Segment Displays with the MAX6954"</a> <span class="cs1-format">(PDF)</span> (Application note) (3 ed.). <a href="Maxim_Integrated" title="Maxim Integrated">Maxim Integrated</a>. March 2008 [2004-06-25]. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170320002007/https://datasheets.maximintegrated.com/en/ds/MAX6955.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2017-03-20<span class="reference-accessdate">. Retrieved <span class="nowrap">2013-05-06</span></span>.</cite></span>

</li>

<li id="cite_note-Maxim-24"><span class="mw-cite-backlink"><b><a href="#cite_ref-Maxim_24-0">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.maximintegrated.com/app-notes/index.mvp/id/3210">"Driving 7-Segment Displays"</a>. <a href="Maxim_Integrated" title="Maxim Integrated">Maxim Integrated</a>. 2004. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170320000854/https://www.maximintegrated.com/en/app-notes/index.mvp/id/3210">Archived</a> from the original on 2017-03-20<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-03-20</span></span>.</cite></span>

</li>

<li id="cite_note-TI_1974_SR-22-25"><span class="mw-cite-backlink"><b><a href="#cite_ref-TI_1974_SR-22_25-0">^</a></b></span> <span class="reference-text"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="http://www.datamath.net/Manuals/SR-22_US.pdf"><i>electronic hexadecimal calculator/converter SR-22</i></a> <span class="cs1-format">(PDF)</span> (Revision A ed.). <a href="Texas_Instruments_Incorporated" class="mw-redirect" title="Texas Instruments Incorporated">Texas Instruments Incorporated</a>. 1974. p. 7. 1304-389 Rev A. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170320001329/http://www.datamath.net/Manuals/SR-22_US.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2017-03-20<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-03-20</span></span>.</cite></span>

</li>

<li id="cite_note-TI_1977_Programmer-26"><span class="mw-cite-backlink"><b><a href="#cite_ref-TI_1977_Programmer_26-0">^</a></b></span> <span class="reference-text"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="http://www.datamath.net/Manuals/TI-Programmer_US.pdf"><i>electronic calculator – TI programmer</i></a> <span class="cs1-format">(PDF)</span>. <a href="Texas_Instruments_Incorporated" class="mw-redirect" title="Texas Instruments Incorporated">Texas Instruments Incorporated</a>. 1977. p. 7. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170328231050/http://www.datamath.net/Manuals/TI-Programmer_US.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2017-03-28<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-03-28</span></span>.</cite></span>

</li>

<li id="cite_note-TI_1981_LCD_Programmer-27"><span class="mw-cite-backlink"><b><a href="#cite_ref-TI_1981_LCD_Programmer_27-0">^</a></b></span> <span class="reference-text"><cite class="citation book cs1"><a rel="nofollow" class="external text" href="http://www.datamath.net/Manuals/LCD-Programmer_US.pdf"><i>electronic calculator – TI LCD programmer</i></a> <span class="cs1-format">(PDF)</span>. <a href="Texas_Instruments_Incorporated" class="mw-redirect" title="Texas Instruments Incorporated">Texas Instruments Incorporated</a>. 1981. p. 8. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170328231558/http://www.datamath.net/Manuals/LCD-Programmer_US.pdf">Archived</a> <span class="cs1-format">(PDF)</span> from the original on 2017-03-28<span class="reference-accessdate">. Retrieved <span class="nowrap">2017-03-28</span></span>.</cite></span>

</li>

</li>

<li id="cite_note-29"><span class="mw-cite-backlink"><b><a href="#cite_ref-29">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://archive.org/stream/bitsavers_litronixdaOptoelectronicsCatalog_31011858/1982_Litronix_Optoelectronics_Catalog#page/n81/mode/2up">"DL-3422 4-digit 22-segment alphanumeric Intelligent Display preliminary data sheet"</a>. <i>Internet Archive</i>. Litronix 1982 Optoelectronics Catalog. p. 82<span class="reference-accessdate">. Retrieved <span class="nowrap">2016-09-03</span></span>.</cite></span>

</li>

</ol></div></div>

<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

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<div class="side-box-text plainlist">Wikimedia Commons has media related to <a href="https://commons.wikimedia.org/wiki/Seven_segment_display" class="extiw external" title="commons:Seven segment display"><span style="font-style:italic; font-weight:bold;">Seven segment display</span></a>.</div></div>

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<ul><li><a rel="nofollow" class="external text" href="http://www.uize.com/examples/seven-segment-display.html">Interactive Demonstration of a Seven Segment Display</a></li>

<li><a rel="nofollow" class="external text" href="https://www.dnatechindia.com/Tutorial/8051-Tutorial/Interfacing-7-Seg-Display-to-Microcontroller.html">Interfacing Seven Segment Display to 8051 Microcontroller</a></li>

<li><a rel="nofollow" class="external text" href="https://circuitdigest.com/microcontroller-projects/0-99-counter-using-avr-atmega32">Interfacing 7-Segment Display with AVR Microcontroller</a></li></ul>

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</style><div id="Display_technology191" style="font-size:114%;margin:0 4em"><a href="Display_device" title="Display device">Display technology</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="Display_device#video_display" title="Display device">Video displays</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;">Past<br>generation</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Eidophor" title="Eidophor">Eidophor</a></li>

<li><a href="Cathode-ray_tube" title="Cathode-ray tube">Cathode-ray tube</a> (CRT)</li>

<li><a href="Jumbotron" title="Jumbotron">Jumbotron</a></li>

<li><a href="Electroluminescent_display" title="Electroluminescent display">Electroluminescent display</a> (ELD)</li>

<li><a href="Rear-projection_television" title="Rear-projection television">Rear-projection display</a></li>

<li><a href="Plasma_display" title="Plasma display">Plasma display panel</a> (PDP)

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;">Current <br>generation</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Quantum_dot_display" title="Quantum dot display">Quantum dot display</a> (QLED)</li>

<li><a href="Electronic_paper" title="Electronic paper">Electronic paper</a>

<li><a href="Gyricon" title="Gyricon">Gyricon</a></li></ul></li>

<li><a href="LED_display" title="LED display">Light-emitting diode display</a> (LED)

<ul><li><a href="OLED" title="OLED">Organic light-emitting diode</a> (OLED)

<ul><li><a href="AMOLED" title="AMOLED">Active-Matrix Organic light-emitting diode</a> (AMOLED)</li></ul></li></ul></li>

<li><a href="Liquid-crystal_display" title="Liquid-crystal display">Liquid-crystal display</a> (LCD)

<li><a href="LED-backlit_LCD" title="LED-backlit LCD">LED-backlit</a></li>

<li><a href="Blue_phase_mode_LCD" title="Blue phase mode LCD">Blue Phase</a></li></ul></li>

<li><a href="Digital_light_processing" title="Digital light processing">Digital light processing</a> (DLP)</li>

<li><a href="Liquid_crystal_on_silicon" title="Liquid crystal on silicon">Liquid crystal on silicon</a> (LCoS)</li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align:center;"><a href="Next_generation_of_display_technology" title="Next generation of display technology">Next <br>generation</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="MicroLED" title="MicroLED">microLED</a></li>

<li><a href="Quantum_dot_display#Self-emissive_quantum_dot_diodes" title="Quantum dot display">Electroluminescent Quantum Dots</a> (ELQD/QD-LED)</li>

<li><a href="Organic_light-emitting_transistor" title="Organic light-emitting transistor">Organic light-emitting transistor</a> (OLET)</li>

<li><a href="Surface-conduction_electron-emitter_display" title="Surface-conduction electron-emitter display">Surface-conduction electron-emitter display</a> (SED)</li>

<li><a href="Field-emission_display" title="Field-emission display">Field-emission display</a> (FED)</li>

<li><a href="Laser_TV" title="Laser TV">Laser TV</a>

<ul><li><a href="Quantum_dot_laser" title="Quantum dot laser">Quantum dot</a></li>

<li><a href="Liquid-crystal_laser" title="Liquid-crystal laser">Liquid crystal</a></li></ul></li>

<li><a href="Microelectromechanical_systems" class="mw-redirect" title="Microelectromechanical systems">MEMS</a> display

<li><a href="Ferroelectric_liquid_crystal_display" title="Ferroelectric liquid crystal display">Ferroelectric liquid crystal display</a> (FLCD)</li>

<li><a href="Thick-film_dielectric_electroluminescent_technology" class="mw-redirect" title="Thick-film dielectric electroluminescent technology">Thick-film dielectric electroluminescent technology</a> (TDEL)</li>

<li><a href="Laser-powered_phosphor_display" title="Laser-powered phosphor display">Laser-powered phosphor display</a> (LPD)</li></ul>

</div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Non-video</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Electromechanics" title="Electromechanics">Electromechanical</a>

<li><a href="Split-flap_display" title="Split-flap display">Split-flap</a></li></ul></li>

<li><a href="Text_display#Eggcrate_displays" title="Text display">Eggcrate</a></li>

<li><a href="Fiber-optic_display" title="Fiber-optic display">Fiber-optic</a></li>

<li><a href="Nixie_tube" title="Nixie tube">Nixie tube</a></li>

<li><a href="Vacuum_fluorescent_display" title="Vacuum fluorescent display">Vacuum fluorescent display</a> (VFD)</li>

<li><a href="Light-emitting_electrochemical_cell" title="Light-emitting electrochemical cell">Light-emitting electrochemical cell</a> (LEC)</li>

<li><a href="Lightguide_display" title="Lightguide display">Lightguide display</a></li>

<li><a href="Dot-matrix_display" title="Dot-matrix display">Dot-matrix display</a></li>

<li><a href="Eight-segment_display" title="Eight-segment display">Eight-segment display</a></li>

<li><a href="Nine-segment_display" title="Nine-segment display">Nine-segment display</a></li>

<li><a href="Fourteen-segment_display" title="Fourteen-segment display">Fourteen-segment display</a> (FSD)</li>

<li><a href="Sixteen-segment_display" title="Sixteen-segment display">Sixteen-segment display</a> (SISD)</li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="3D_display" title="3D display">3D display</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Stereoscopy" title="Stereoscopy">Stereoscopic</a></li>

<li><a href="Autostereoscopy" title="Autostereoscopy">Autostereoscopic</a></li>

<li><a href="Multiscopy" title="Multiscopy">Multiscopic</a></li>

<li><a href="Holography" title="Holography">Hologram</a>

<ul><li><a href="Holographic_display" title="Holographic display">Holographic display</a></li>

<li><a href="Computer-generated_holography" title="Computer-generated holography">Computer-generated holography</a></li></ul></li>

<li><a href="Volumetric_display" title="Volumetric display">Volumetric</a></li>

<li><a href="Fog_display" title="Fog display">Fog display</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Static media</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Monoscope" title="Monoscope">Monoscope</a></li>

<li><a href="Movie_projector" title="Movie projector">Movie projector</a></li>

<li><a href="Slide_projector" title="Slide projector">Slide projector</a></li>

<li><a href="Transparency_(projection)" title="Transparency (projection)">Transparency</a></li>

<li><a href="Laser_lighting_display" title="Laser lighting display">Laser beam</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Display capabilities</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="DisplayID" title="DisplayID">DisplayID</a></li>

<li><a href="Always-on_display" title="Always-on display">Always-on display</a></li>

<li><a href="See-through_display" title="See-through display">See-through display</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related articles</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="History_of_display_technology" title="History of display technology">History of display technology</a></li>

<li><a href="Large-screen_television_technology" title="Large-screen television technology">Large-screen television technology</a></li>

<li><a href="Optimum_HDTV_viewing_distance" title="Optimum HDTV viewing distance">Optimum HDTV viewing distance</a></li>

<li><a href="High-dynamic-range_television" title="High-dynamic-range television">High Dynamic Range</a> (HDR)</li>

<li><a href="Color_Light_Output" title="Color Light Output">Color Light Output</a></li>

<li><a href="Flexible_display" title="Flexible display">Flexible display</a></li>

<li><a href="Comparison_of_CRT%2C_LCD%2C_plasma%2C_and_OLED_displays" title="Comparison of CRT, LCD, plasma, and OLED displays">Comparison of CRT, LCD, plasma, and OLED displays</a></li></ul>

</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="Comparison_of_display_technology" title="Comparison of display technology">Comparison of display technology</a></div></td></tr></tbody></table></div></div><div><div class="zim-footer">

This article is issued from <a class="external text" title="Last edited on 2025-07-19" href="https://en.wikipedia.org/wiki/?title=Seven-segment_display&oldid=1301411717">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.

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