Backlighting device for display screen of television or mobile phone

A mobile phone, backlight technology, applied in optics, nonlinear optics, static indicators, etc., can solve problems such as reducing perceptual resolution and reducing visual acuity

Pending Publication Date: 2021-12-07
GEMEX CONSULTANCY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may reduce perceived resolution and reduce visual acuity

Method used

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  • Backlighting device for display screen of television or mobile phone
  • Backlighting device for display screen of television or mobile phone
  • Backlighting device for display screen of television or mobile phone

Examples

Experimental program
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Embodiment Construction

[0047] Figure 1A A front view of an LCD television screen 1 placed in a housing 2 in which the screen 1 is installed according to the embodiment is schematically shown. The screen comprises a pixel array 3 (only partly shown) consisting of an array of pixels whose colors can be set individually. In order to display the image on the screen 1 , the processing device 4 converts the digital image (transmitted eg by a web server, digital memory or computer) into a set of colors corresponding to the pixels in the pixel array 3 . The processed image is sent to a controller 5 which controls the individual color of each pixel in the pixel array 3 . The processing device 4 and the controller 5 are preferably incorporated in the housing 2 of the screen 1 itself, eg on the back of the screen. Alternatively, they are separate from the screen 1 , but are able to communicate with the relevant part of the screen 1 , in particular the pixel array 3 or in particular with the liquid crystals. ...

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PUM

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Abstract

A backlight device (10) for a display screen (1) comprises a first light source (12) adapted to emit light having a peak wavelength between 600 and 630 nm; a second light source (14) adapted to emit light having a peak wavelength between 510 and 530 nm and a third light source (16) adapted to emit light having a peak wavelength between 440 and 460 nm. The spectral power distribution of the backlight results in an enhanced visual acuity and color perception by better segregating the emission peaks (113, 115, 117) of the light sources and arranging their peak wavelengths at values which particularly suit the spectral sensitivity of the eye. Not only is the perceived resolution of the display screen increased but also the perceived brightness is improved allowing energy savings to be made.

Description

technical field [0001] The present invention relates to backlighting devices for screens of televisions, mobile phones and the like. The invention also relates to a screen comprising such a backlight device. Background technique [0002] Currently, screens and displays for TVs and the like are usually made of LCD (Liquid Crystal Displays) that use LED (Light Emitting Diode) backlights. LEDs generate light with a specific spectral distribution that is directed through multiple TFT (Thin Film Transistor) channels, which may have a well-defined bandwidth selective distribution, to provide red, green or blue colored sub-pixels. These screens usually comply with international standards such as BT 2020 or NTSC. Typically, on average about 6% of the light generated behind the TFT channel is actually emitted from the front of the screen. This limits the luminous efficiency of the screen and creates a waste of energy. [0003] At the same time, the perceived resolution of the scr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02F1/1335
CPCG02F1/133603G02F1/133514G02F1/133624G02F1/133637G02F1/133606G02F1/133609G09G3/3607
Inventor 约翰内斯·奥托·罗伊曼斯
Owner GEMEX CONSULTANCY
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