Seven-segment display
In 1910, a seven-segment display illuminated by incandescent bulbs was used on a power-plant boiler room signal panel.Unlike LEDs, the shapes of elements in an LCD panel are arbitrary since they are formed on the display by photolithography.Using a restricted range of letters that look like (upside-down) digits, seven-segment displays are commonly used by school children to form words and phrases using a technique known as "calculator spelling".For gasoline price totems and other large signs, electromechanical seven-segment displays made up of electromagnetically flipped light-reflecting segments are still commonly used.[14] In USSR, the first electronic calculator "Vega", which was produced from 1964, contains 20 decimal digits with seven-segment electroluminescent display.Some of these integrated displays incorporate their own internal decoder, though most do not: each individual LED is brought out to a connecting pin as described.[17] 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.The digit changes at a high enough rate that the human eye cannot see the flashing (on earlier devices it could be visible to peripheral vision).[18][16] A single byte can encode the full state of a seven-segment display, including the decimal point.
display devicedecimalnumeralsdot matrix displaysdigital clockspatentspotteddual in-line package16 segmentsVacuum fluorescent displaytemplateliquid-crystal displaysphotolithographyrectanglescontrastcalculatorstype designersNew Alphabetcalculator spellingGas stationCalculatorApollo Guidance ComputerCD playerliquid-crystal displaylight-emitting diodecold cathodevacuum fluorescentincandescent filamentsgasolinenixie tubeelectroluminescent displaycathodesanodesdecodermultiplexed displaysdriver circuitmultiplexedSeven-segment display character representationsobliquehexagonstrapezoidsadding machinesArabic numeralsdecimal pointnumerical digitsSymbols for Legacy Computingbinary-coded decimalhexadecimallatin alphabetCD playersEight-segment displayNine-segment displayFourteen-segment displaySixteen-segment displayDot matrix displayWestermann VerlagWayback MachineelektorFranzis-Verlag GmbHMaxim IntegratedTexas Instruments IncorporatedDisplay technologyEidophorCathode-ray tubeJumbotronRear-projection displayPlasma display panelQuantum dot displayElectronic paperGyriconLight-emitting diode displayOrganic light-emitting diodeActive-Matrix Organic light-emitting diodeLED-backlitBlue PhaseDigital light processingLiquid crystal on siliconNext generationmicroLEDOrganic light-emitting transistorSurface-conduction electron-emitter displayField-emission displayLaser TVQuantum dotLiquid crystalFerroelectric liquid crystal displayThick-film dielectric electroluminescent technologyLaser-powered phosphor displayElectromechanicalFlip-dotSplit-flapFiber-opticLight-emitting electrochemical cellLightguide displayDot-matrix display3D displayStereoscopicAutostereoscopicMultiscopicHologramHolographic displayComputer-generated holographyVolumetricFog displayMonoscopeMovie projectorNeon signSlide projectorTransparencyLaser beamCEA-861DisplayIDAlways-on displaySee-through displayScan lineHistory of display technologyLarge-screen television technologyOptimum HDTV viewing distanceHigh Dynamic RangeColor Light OutputFlexible displayComparison of CRT, LCD, plasma, and OLED displaysComparison of display technology