Backlight

backlitLED backlitbacklightingLED-backlitback-litLED backlightLCD backlightCCFL tube lightconventional white LEDsLED
A backlight is a form of illumination used in liquid crystal displays (LCDs).wikipedia
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Liquid-crystal display

LCDliquid crystal displayLCD screen
A backlight is a form of illumination used in liquid crystal displays (LCDs).
Liquid crystals do not emit light directly, instead using a backlight or reflector to produce images in color or monochrome.

Cold cathode

cold-cathodecold cathode fluorescent lampscold cathode fluorescent
Cold-cathode fluorescent lamps are used for backlighting of LCDs, for example computer monitors and television screens.

Frontlight

frontlit
Backlights illuminate the LCD from the side or back of the display panel, unlike frontlights, which are placed in front of the LCD.

Nanoco

NanoCo Technologies
Other companies pursuing this method are Nanoco Group PLC (UK), QD Vision, 3M a licensee of Nanosys and Avantama of Switzerland.
The bulk manufacture of quantum dots provides companies with the platform to develop a wide variety of next-generation products, particularly in application areas such as displays (Quantum dot display), LED lighting, backlighting, flexible low-cost solar cells and biological Imaging.

Gamut

color gamutwide color gamutWide color
RGB LEDs can deliver an enormous color gamut to screens.

Light-emitting diode

LEDLEDslight emitting diodes
A white LED is typically a blue LED with broad spectrum yellow phosphor to result in the emission of white light.
LEDs are also used as a light source for DLP projectors, and to backlight LCD televisions (referred to as LED TVs) and laptop displays.

Quantum dot

quantum dotsartificial atomquantum-dot
A new method to further improve the color gamut of LED-backlit LCD panels is based on blue LEDs (such as GaN) illuminating a layer of nanocrystal phosphors, so-called Quantum Dots (QD), which convert the blue wavelengths to the desired longer wavelengths as narrow-bandwidth green and red colors for optimal illumination of the LCD from behind.
A conventional color liquid crystal display (LCD) is usually backlit by fluorescent lamps (CCFLs) or conventional white LEDs that are color filtered to produce red, green, and blue pixels.

Fluorescent lamp

fluorescent lightingfluorescent lightfluorescent
CCFL backlights are used on larger displays such as computer monitors, and are typically white in color; these also require the use of an inverter and diffuser.
Cold-cathode fluorescent lamps were used as backlighting for LCDs in computer monitors and televisions before the use of LED-backlit LCDs.

Vaio

Sony VaioAVIOSony
Sony has used LED backlights in some of its higher-end slim VAIO notebooks since 2005, and Fujitsu introduced notebooks with LED backlights in 2006.
Battery life is also extended through reduced usage of the LCD backlight.

Cathode-ray tube

cathode ray tubeCRTcathode ray tubes
As LCDs do not produce light by themselves—unlike, for example, cathode ray tube (CRT) displays—they need illumination (ambient light or a special light source) to produce a visible image.

Available light

ambient lightambienceambient
As LCDs do not produce light by themselves—unlike, for example, cathode ray tube (CRT) displays—they need illumination (ambient light or a special light source) to produce a visible image.

Watch

wristwatchwatcheswristwatches
Backlights are used in small displays to increase readability in low light conditions such as in wristwatches, and are used in smart phones, computer displays and LCD televisions to produce light in a manner similar to a CRT display.

Smartphone

smartphonessmart phonesmart phones
Backlights are used in small displays to increase readability in low light conditions such as in wristwatches, and are used in smart phones, computer displays and LCD televisions to produce light in a manner similar to a CRT display.

Computer monitor

monitorcomputer displaymonitors
Backlights are used in small displays to increase readability in low light conditions such as in wristwatches, and are used in smart phones, computer displays and LCD televisions to produce light in a manner similar to a CRT display.

LCD television

LCD TVLCDLiquid crystal display television
Backlights are used in small displays to increase readability in low light conditions such as in wristwatches, and are used in smart phones, computer displays and LCD televisions to produce light in a manner similar to a CRT display.

Calculator

pocket calculatorcalculatorselectronic calculator
Simple types of LCDs such as in pocket calculators are built without an internal light source, requiring external light sources to convey the display image to the user.

Light valve

Light valves then vary the amount of light reaching the eye, by blocking its passage in some way.

Polarizer

circular polarizerpolarizing filterpolarized
Most use a fixed polarizing filter and a switching one, to block the undesired light.

Diffuser (optics)

diffuserdiffuserslight diffuser
An ELP gives off uniform light over its entire surface, but other backlights frequently employ a diffuser to provide even lighting from an uneven source.

Monochrome

monochromaticblack and whiteblack-and-white
Monochrome LCDs typically have yellow, green, blue, or white backlights, while color displays use white backlights that cover most of the color spectrum.

Yellow

y'''ellowcanary yellowGold
Monochrome LCDs typically have yellow, green, blue, or white backlights, while color displays use white backlights that cover most of the color spectrum.

Green

Dark GreenForest GreenKelly Green
Monochrome LCDs typically have yellow, green, blue, or white backlights, while color displays use white backlights that cover most of the color spectrum.

Blue

Dark BlueRoyal BlueLight blue
Monochrome LCDs typically have yellow, green, blue, or white backlights, while color displays use white backlights that cover most of the color spectrum.

White

Pure Whitewhite lightwhitish
Monochrome LCDs typically have yellow, green, blue, or white backlights, while color displays use white backlights that cover most of the color spectrum.

Visible spectrum

visiblevisible lightspectrum
Monochrome LCDs typically have yellow, green, blue, or white backlights, while color displays use white backlights that cover most of the color spectrum.