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Light modulating method and apparatus for projection display with detector and projection display thereof

A detection device, a technology of a light detection device, applied in the direction of projection devices, optics, instruments, etc., can solve the problems of color saturation deviation, different light attenuation degrees, etc. of the display screen, and achieve the effect of ensuring illumination

Inactive Publication Date: 2006-11-15
张家荣 +2
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  • Description
  • Claims
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Problems solved by technology

[0009] In addition, for LCD projection displays, for example, the aging rates of the red, green and blue unit cells themselves are also different. In other words, after three years of use, for the red, green and blue light beams emitted by the same light source, When receiving spatial signal modulation through the LCD optical machine, the degree of light attenuation is different, which also causes the color saturation of the display screen to deviate from the original preset ideal state; how to correctly analyze the aging degree of each color unit cell, respectively for Each color unit cell applies a compensation signal corresponding to its aging degree to ensure the predetermined color saturation, which is also a goal worthy of effort

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  • Light modulating method and apparatus for projection display with detector and projection display thereof
  • Light modulating method and apparatus for projection display with detector and projection display thereof
  • Light modulating method and apparatus for projection display with detector and projection display thereof

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Embodiment Construction

[0049] The aforementioned and other technical content, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments given with reference to the drawings.

[0050] Currently common projection displays, such as LCOS, LCD or DLP projection displays, etc., such as Figure 4 As shown, each includes a light source 30 , a processing device 31 , an optical machine 32 and a display screen 33 . Wherein the light source 30 has a high-pressure discharge bulb 300; the processing device 31 can output an excitation signal to drive the light source 30 to emit light; The light intensity projected by each unit cell position in 32 corresponds to the image data signal; the display screen 33 is used for projecting the modulated light beam from the optical machine 32 thereon to present image data corresponding to the image data signal.

[0051] According to the projection display with detection device provided by the present...

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Abstract

The present invention relates to a light-modulating method for projection display, its device and said projection display. It is characterized by that when the projection display is corrected, firstly a test light beam is projected by a light source, then a light detection device can be used for detecting the illumination intensity of said projected light beam so as to regulate power supply for driving said light source to ensure that the integral illumination intensity of said projection display can meet predefined requirement.

Description

Technical field: [0001] The invention relates to a dimming method and device for a projection display; in particular, a dimming method and device for a light-sensitive projection display, and the projection display. Background technique: [0002] At present, when reconstructing dynamic image data, common displays are nothing more than fixed-size displays such as cathode ray tube (CRT) displays, liquid crystal displays (LCD), and plasma displays, as well as non-fixed-size projection displays. For household sizes below 40 inches, flat-panel displays such as liquid crystal displays and plasma displays currently have a market advantage in terms of price and occupied volume. On the other hand, when the image data needs to be magnified to a larger area for viewing, as the panel area of ​​the fixed-size flat-panel display device increases, the probability of defects will double, and the product qualification rate will drop rapidly, so the manufacturing cost will increase significan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/00H04N5/74
Inventor 张家荣温俊裕庄嘉明张诚
Owner 张家荣
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