A video image color compensation method and device based on digitally controlled optical filter

An optical filter and color compensation technology, which is applied to projection devices, image reproducers using projection devices, instruments, etc., can solve the problems of reducing the color reproduction degree of projection devices, impossible uniform distribution of colors, and color distortion of projection devices. Achieve the effect of enhancing color reproduction, perfect reproduction ability, and compensating filter distortion
CN103152583BInactive Publication Date: 2014-10-15EAST CHINA NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
EAST CHINA NORMAL UNIV
Publication Date
2014-10-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a video image color compensation method and device based on a numerically controlled optical filter. The device includes a digital micromirror drive board, a digital micromirror device DMD, a numerically controlled optical filter, and a UHP lamp as a light source. The digital micromirror drives The board includes Field Programmable Gate Array FPGA and microcontroller ARM, among them, FPGA is the core processor of the system, used to realize color compensation, and finally drive the digital micromirror device DMD. The microcontroller ARM is used to drive the numerically controlled optical filter to ensure its high-speed rotation; the light source UHP lamp is the light source of the digital micromirror device DMD, and the numerically controlled optical filter is used as the color filter of the light source. The white light emitted by the light source at each moment is only Monochromatic light can shine on the DMD through digitally controlled light filters. The invention proposes a color compensation method and device aiming at the filtering distortion existing in the digitally controlled optical filter itself, which enhances the color restoration of video image display.
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Description

technical field

[0001] The invention relates to the technical field of optical filter processing, in particular to a video image color compensation method and device based on a numerically controlled optical filter. Background technique

[0002] An optical filter is an instrument used for wavelength selection, which can select the desired wavelength from many wavelengths and reject light other than this wavelength. Any technology that can select light can be used to manufacture optical filters in principle, so there are many forms of optical filters. In digital light processing (DLP) display technology, it is necessary to use optical filters to complete the separation and processing of colors, so as to realize color projection display. Here, a color filter is used to realize the optical filter, which can accurately select the small-range band of light waves to pass, and reflect other bands that do not want to pass through. Usually, the color filter is installed in front of...

Claims

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