Oblique graded spectral film and its test method and liquid crystal projection display

A liquid crystal projection and display device technology, applied in projection devices, optics, static indicators, etc., can solve the problems of uneven color distribution of three primary colors and uneven distribution of three primary colors, and achieve the effect of improving brightness and uniformity

Inactive Publication Date: 2005-08-10
UNITED MICROELECTRONICS CORP
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0013] In the off-axis reflective liquid crystal projection device, there is a problem that the distribution of each color of the three primary colors of light after light splitting is not uniform
Generally speaking, even in an off-axis

Method used

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  • Oblique graded spectral film and its test method and liquid crystal projection display
  • Oblique graded spectral film and its test method and liquid crystal projection display
  • Oblique graded spectral film and its test method and liquid crystal projection display

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Embodiment Construction

[0075] FIG. 5A is a top view showing the off-axis optical design of the beam splitter. Figure 5B It is a cross-sectional view, showing the schematic diagram obtained from the direction C in FIG. 5A. Figure 5C It is a cross-sectional view showing a schematic diagram of a light spot (light spot) obtained on the D-D cross-section in FIG. 5A. from Figure 5B , it can be known that the light ray 502 is not perpendicularly incident on the reflective surface 506 of the beam splitter 504 , but has an angle with the normal of the reflective surface 506 . from Figure 5C , it can be known that the shape of the light spot (light spot) 512 obtained by the light ray 502 on the reflective surface 506 is an oblique ellipse, and in this off-axis optical design, the color uniformity of the light spot 512 is not good .

[0076] When it is necessary to obtain better color uniformity, one of the improvement methods is to use optical coating technology to plate dielectric or metal films with...

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Abstract

The present invention relates to an oblique graded spectroscopic film, its detection method and liquid crystal projection display device. Said oblique graded spectroscopic film includes one spectroscopic film, in which a film layer property of said spectroscopic film has a gradation direction, and said gradation direction of said spectroscopic film is related to an incident angle of an incident light, so that the regulation of the thickness of film layer coated on the spectroscope or gradation direction of film layer property, etc. and distribution of film layer thickness of film layer property on said gradation direction can be utilized to obtain the spectroscopic light beam with uniform distribution of energy, colour, reflectivity or penetration and spectroscopic property so as to can effectively raise the luminance, uniformity and contrast articulation of output image of reflected liquid crystal projection display device.

Description

technical field [0001] The invention relates to a gradient light splitting film and a reflective liquid crystal projection display device. And in particular, it relates to an oblique gradient light-splitting film, inspection method, and reflective liquid crystal projection display device that can be applied to off-axis projection light-mechanical systems and improve its uniformity, brightness, and contrast clarity. Background technique [0002] In recent years, liquid crystal displays (Liquid Crystal Displays, LCDs) have gradually replaced traditional cathode ray tubes (Cathode Ray Tubes, CRTs) due to their advantages of thinness, light weight, low operating voltage, power saving, and no radiation. ), and become the mainstream of display devices. However, due to limitations in liquid crystal display (LCD) technology, most of them can only be limited to products with a display screen of 30 or less. As for the displays from 30 o'clock to 60 o'clock, the development of PDP (P...

Claims

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Application Information

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IPC IPC(8): G02B5/30G02F1/133G03B21/00G03B21/28
Inventor 黄成宇刘怡纬姜柏良
Owner UNITED MICROELECTRONICS CORP
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