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Color display

A color display and color technology, applied to static indicators, instruments, picture duplicators, etc., can solve complex problems such as black and white display

Inactive Publication Date: 2007-06-20
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one problem with this display is that it is still much more complicated than a black and white display

Method used

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  • Color display
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Embodiment Construction

[0021] The present invention relates generally to color display devices usable in television sets, computer monitors, mobile phone displays, etc., for displaying still or video picture information.

[0022] Figures 1a and 1b schematically illustrate the general principles of the invention.

[0023] A display device according to an embodiment of the present invention comprises two light sources A and B, respectively having different radiation spectra 3 and 4, as shown in Fig. 1a. The radiation spectrum 3 of the first light source A comprises two different colors 5 , 6 , for example blue 5 and yellow 6 . The radiation spectrum 4 of the second light source B comprises two different colors 7 , 8 , for example cyan 7 and red 8 .

[0024] According to an embodiment of the present invention, the display device further includes a liquid crystal light valve layer, hereinafter referred to as an LCD layer. The LCD layer is spectrally selective. A drive signal is provided to the LCD la...

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Abstract

The present invention relates to a color display device, comprising at least two light sources (16, 17), having different radiance spectra, and a liquid crystal light valve layer (14). The light sources (16, 17) are activated sequentially and the light valve layer is provided with driving signals (d1, d2) in such a way that it obtains a strong wavelength dependence. This allows the display device to produce primary colors without the provision of color filters. This provides a less complex display, which is suitable for mobile applications and provides high brightness.

Description

technical field [0001] The invention relates to a color display device for displaying a color picture, comprising: a liquid crystal light valve layer having several image units arranged in an array; at least two light sources having substantially different radiation spectra and being activated alternately; and a color selection device for co-producing primary colors in said color picture with said light source. The invention also relates to a method of controlling such a color display device. Background technique [0002] WO2004 / 032523 A1 discloses such a display device. The display device comprises a pixel with two color filters, each of which is arranged in a sub-pixel, and uses two different selectable light sources which are activated alternately. This configuration has a wider opening for each pixel and improved color gamut relative to a conventional configuration including a white backlight configuration and three filters (RGB) for each pixel. One problem with such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357G02F1/139G09G3/36H04N9/31G02F1/1335
CPCG02F1/133621G09G2310/0235G02F2203/34G09G3/3607G09G2300/0491G02F1/1395G09G3/3413G02F1/1393G02F1/1335H04N9/12
Inventor S·J·罗森达尔
Owner KONINK PHILIPS ELECTRONICS NV