backlight

A backlight is a form of illumination used in liquid crystal displays (LCDs). 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. Backlights illuminate the LCD from the side or back of the display panel, unlike frontlights, which are placed in front of the LCD. 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. A review of some early backlighting schemes for LCDs is given in a report Engineering and Technology History by Peter J. Wild under its section Backlit LCDs.
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. Most LCD screens, however, are built with an internal light source. Such screens consist of several layers. The backlight is usually the first layer from the back. Light valves then vary the amount of light reaching the eye, by blocking its passage in some way. Most use a fixed polarizing filter and a switching one, to block the undesired light.

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  1. bonydz007

    Tv 58inch color issue

    Hi team I bought a tv from online in north africa market, brand skyworth 58inch. I found out the tv have some color issue after longue checking i noticed the main issue when starting any video is the daytime like sun light, sky, , snow white cloths the sun light that fall in those objects all...
  2. 0

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  3. sanjit

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  4. rocksolidau

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  5. S

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  6. G

    PHILIPS 43PFT4002 /05

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  7. technomen

    CES 2024

    sorry I didn't see Goldorak's thread. So thread to delete. Sorry again Goldorak ...
  8. kevlar

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  9. Zero83

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  10. S

    Question Backlight Troubleshooting

    Samsung un55nu6950fxza: Replaced 1 of 2 backlight strips twice with half the lights on one strip burning out. Any ideas?
  11. M

    Question JVC LED TV with no backlight! Power board and backlight Ok! please help!

    Hello, My 40 inch JVC LED TV works fine, has sound, but it has no backlight. I have tested the power board and the backlight, they seems to be okay. When, I remove the ribbon cable that goes from the Main board to the T-con board (backlight turns up), and then put it back again, the backlight...
  12. J

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    I have Philips Ambilight 50PUS6754/12 TV and when I first switch the screen on the picture appears fine, but after about 5-10 minutes it loses it's clarity and appears to fade giving a washout out appearance. I've attached two photo's to demonstrate the problem. Is it a backlight problem or...
  13. E

    Dead Backlight on Toshiba 32L3863DB

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  14. buddy777

    HUAWEI 14in Matebook backlight fault?

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  15. malcolmdixon

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  16. F

    Can LED backlight fitted when using a Samsung Slim Fit wall mount

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  17. gingerninja72

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  18. iantresman

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  19. D

    43" Neo QLED 4K QN94B Backlight Problem

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  20. buddy777

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