Contrast control device and projector provided with same
A technology for adjusting device and contrast, applied in projection device, installation, optics, etc., to achieve the effect of maintaining high contrast, improving service life and reducing production cost
Inactive Publication Date: 2013-12-11
WUHU AMT MICRO DISPLAY TECH
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Problems solved by technology
[0004] The object of the present invention is to provide a projector contrast adjustment device capable of dispersing and effectively absorbing a large amount of heat emitted by the projector light source, so as to solve the technical problem of how to effectively block the light source light so as to ensure the high contrast of the projector
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] The implementation of the present invention will be described in detail below in conjunction with specific drawings.
[0023] Such as figure 1 and figure 2 As shown, an embodiment of the present invention provides a contrast adjustment device for a projector, including a driving part 10, a transmission part 20, and a concave mirror 30. The concave mirror 30 is composed of a plurality of concave mirror baffles. It should be noted that , the above-mentioned plurality of concave mirror blocks are cut and formed by the same concave mirror, and have the same focal length. The driving part 10 ...
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The invention discloses a contrast control device and a projector provided with the same. The contrast control device comprises a driving part, a transmission part and a concave mirror. The concave mirror is composed of a plurality of concave mirror baffle pieces. The driving part is connected with the transmission part, the transmission part is fixedly connected with the concave mirror baffle pieces, and the driving part drives the transmission part to drive the concave mirror baffle pieces to be separated and combined. The strength for the light emitted into the concave mirror to pass through the concave mirror is adjusted through the range separated by the concave mirror baffle pieces, and the complete concave mirror is formed when the concave mirror baffle pieces are combined. According to the contrast control device, the scattering effect of the concave mirror is utilized, so that heat of a light source is absorbed uniformly and effectively, the phenomenon that a light barrier is damaged due to the fact that the local temperature rises rapidly when the light barrier absorbs a great deal of heat of the light source can be avoided, the light of the light source can be shielded effectively, the service life of the contrast control device is prolonged, and the technical effect of high-contrast work of the projector is maintained.
Description
technical field [0001] The invention relates to the field of projection equipment, in particular to a contrast adjustment device for a projector and a projector with the device. Background technique [0002] With the development of technology, the technical requirements of projectors continue to increase, and the requirements for noise, clarity and contrast of projectors are getting higher and higher. A projector generally includes a lighting device, a light modulation device and a light projection device. The light emitted by the light source in the lighting device is guided to a display device such as a liquid crystal screen through a series of optical elements. The light is projected onto the screen through a series of lenses in the light projection device to display images. [0003] In the optical path of the projector, after the light source of the lighting device, a contrast adjustment device (IRIS) is provided. A shading plate is installed in the IRIS. Intensity eff...
Claims
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IPC IPC(8): G03B21/14G03B21/00G02B7/02
Inventor 胡勇梁志强叶翔
Owner WUHU AMT MICRO DISPLAY TECH