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

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...

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 reflective liquid crystal projection device, using a horizontal gradient dichroic mirror or a horizontal gradient dichroic filter, the color distribution of the three primary colors of light after splitting is still not uniform enough.

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