Projector and colour filtering device thereof

A color filter and projector technology, applied in projection devices, optics, instruments, etc., can solve the problems of reducing color vividness and picture color distortion.

Inactive Publication Date: 2007-01-03
BENQ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the brightness of the RGBW four-color wheel 20 has been improved, due to the inherent differences in the spectral wavelengths of different colors o

Method used

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  • Projector and colour filtering device thereof
  • Projector and colour filtering device thereof
  • Projector and colour filtering device thereof

Examples

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Embodiment Construction

[0036] The color filter device of the present invention is preferably applied in a digital light processing projector (Digital Light Processing; DLP). The color filter device includes a first filter and a second filter, and the second filter is movable relative to the first filter. By means of a relative movement of the two filters, the filter areas of the first filter and the filter areas of the second filter can optionally be overlapped.

[0037] Please refer to image 3 , which is a schematic diagram of a digital light processing projector and its light path according to a preferred embodiment of the present invention. The digital light processing projector 300 includes: a light source 310 , a color filter device 320 , an optical component 330 , an imaging element 340 , and a lens 350 . The light source 310 is used to generate light. like image 3 As shown, the light source 310 includes an elliptical reflector 312 and a bulb 314 , and the bulb 314 is disposed at the fir...

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Abstract

A projecting camera and the colored filter equipment. The colored filter equipment uses for dichroic light, includes the first filter and the second filter. The first filter includes the yellow filter area, the cyan filter area and the green filter area. The second filter includes the carmine filter area. The second filter can move relative to the first filter, in order that the carmine filter area overlaps on the yellow filter area selectively and overlaps on the cyan filter area selectively. Shows red by the light of the overlapping carmine filter area and the overlapping yellow filter area, shows blue by the light of the overlapping carmine filter area and the overlapping cyan filter area. The invention can make the light pass the two filters, the two filters can form overlapping filter area selectively by the colored filter equipment, uses the overlapping arrange of the filter area with different color sect that can improve the color and the brightness of the projecting camera.

Description

technical field [0001] The invention relates to a color filter device, in particular to a color filter device used in a digital projector. Background technique [0002] Digital Light Processing (DLP) projectors have become the mainstream technology of projectors at present, and are the best among projection display products in terms of lightness, durability, or high brightness and high contrast. DLP projectors set the color wheel (Color Wheel; CW) on the path of the light source. After the light emitted by the light source is processed by the high-speed rotating color wheel, the colored light is generated and projected to the Digital Micromirror Device (Digital Micromirror Device; DMD) )superior. [0003] Please refer to figure 1 and figure 2 . figure 1 and 2 They are schematic diagrams of a traditional RGB three-color wheel and an RGBW four-color wheel, respectively. The early RGB three-color wheel 10 is composed of three color segments of red R, green G, and blue B....

Claims

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Application Information

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IPC IPC(8): G03B21/14
Inventor 鲍昭汉
Owner BENQ CORP
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