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Method and apparatus for increasing colour gamut of display device

A color and green technology, applied in the field of color gamut devices, can solve the problems of unreachable and narrowing of effective color gamut, and achieve the effect of no filter loss and wide color gamut

Inactive Publication Date: 2003-12-03
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other schemes of adding color narrow the effective color gamut
In addition, for projection devices using more than three colors, conventional design solutions cannot meet the requirements of convenience, practicality and economy

Method used

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  • Method and apparatus for increasing colour gamut of display device
  • Method and apparatus for increasing colour gamut of display device
  • Method and apparatus for increasing colour gamut of display device

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Embodiment Construction

[0054] Detailed Description of Preferred Embodiments

[0055] A detailed description is given here of the component parts, in particular the combinations, of the device according to the invention. It should be appreciated that the elements are not limited to the form described herein and that various forms are known to those skilled in the art.

[0056] Theoretical background of extended color gamut

[0057] see still figure 1The color gamut map arrangement of , in which it is noted that the basic strategy for expanding the display color gamut is to pick those color sources that are close to the periphery of the horseshoe. Because of their ability to provide a spectrally pure and saturated color source, lasers are efficient for this purpose and are the spectrally pure color source of the preferred embodiment. The laser color can be directly mapped to points lying on the horseshoe curve of the visible region 100 . Note that an RGB LED can be used as an alternative light sou...

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PUM

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Abstract

A method and projection system (10) for increasing the color gamut of images projected onto a display surface (140) by using four or more light sources (12), where the light sources (12) are selected for high brightness and narrow wavelength characteristics and are selected from optimal wavelengths for color gamut expansion. Light sources (12) for large-scale projection environments are preferably lasers. Smaller systems may employ LEDs or other relatively saturated, relatively bright light sources (12).

Description

field of invention [0001] The present invention relates generally to imaging devices for displaying images using digital data, and more particularly to an apparatus and method for improving the color gamut of projected high resolution moving image images. Background technique [0002] There are many different color spaces used to describe the human visual system. There is an attempt to specify an operable color space, and the Commission International del'Eclairage (International Commission on Illumination) published in 1931 developed the CIE Chromaticity Diagram. This CIE color model uses tristimulus values ​​X, Y, Z based on standard human vision. The x and y plots were then modified into u' and v' plots, with equidistant distances in the plots representing equal perceived color shifts. Useful background notes on color perception and color models can be found in Billmeyer and Saltzmann's Principles of Color Technology, Third Edition, Wiley and Sons and Dr. R.W.G. Hunt's T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G02B27/18G03B21/00G03B21/14H04N5/74H04N9/31
CPCH04N9/3161H04N9/3197H04N9/3167H04N9/3158H04N5/7441
Inventor J·E·罗迪R·J·佐拉W·R·马基斯
Owner EASTMAN KODAK CO
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