High definition signal displaying rear projection screen
A signal display and screen technology, applied in optics, lenses, instruments, etc., can solve the problems of rough display image, low image contrast, low image quality, etc., to improve image display quality, save power, improve brightness and resolution. Effect
Inactive Publication Date: 2007-08-01
秦皇岛昌隆银幕有限公司
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Problems solved by technology
[0004] As far as traditional broadcast television systems are concerned, such as NTSC and PAL color TV sets, there is such a problem in the above-mentioned general rear projection screens that the displayed images are relatively rough, especially digital high-definition images are projected on existing screens When the external light is strong, the displayed image will appear very rough, the surface of the screen looks like a layer of fine mesh, the image quality is low, the image contrast on the screen is low, the image becomes white when the external light is strong, and the sharpness is not enough
And because the rear projection screen is often rubbed by fine particles, the above problems will become more serious due to the friction of the screen surface
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[0055] The present invention is generally applicable to high-definition signal display of rear-projection television sets such as LCOS, DLP, LCD, etc., rear-projection data display walls, etc., or rear-projection screens for other rear-projection display devices. In order to improve the clarity of the entire screen, the uniformity of contrast and brightness and the thinning of the rear projection space.
[0056] FIG. 1 is a schematic structural diagram of a conventional rear projection device. The arrowed straight line represents the light transmission path.
[0057] The image light is emitted by a color cathode ray tube (CRT) 01, and then projected through a projection lens 02 onto a plane reflective mirror 04 with an inclined angle, and the light is reflected by the mirror onto a rear projection screen 03 to form an image.
[0058] Figure 2 is a structural diagram of a traditional rear projection screen 03. After passing through the Fresnel lens 031 , the light is focused ...
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This invention relates to one high accurate signal display background projection screen, which comprises light input side lens layer ad light output side screen development layer, wherein, lens layer is of Fresnel lens layer; the screen development layer comprises one single column side semi-circle side facing lens side with several vertical semi-round column structure to form surface and with other side as vertical plane; one black grating with certain black beam by parallel distribution set on other side vertical plane on non-circle column lens layer; one micro light tube materials optical diffraction board composed of input and output slide planes.
Description
technical field [0001] The invention relates to a rear projection screen, which can be used in combination with various projection imaging light engines, especially when combined with high-definition signal projection imaging light engines such as LCOS, DLP, and LCD, it can display high-definition images. The rear projection screen provided by the invention is also used in the technical field of rear projection screens used in micro-display rear projection TV sets, data display walls and other rear projection display devices. Background technique [0002] The traditional rear projection TV or rear projection screen for rear projection display is mainly composed of three parts: protective plate, lenticular lens and Fresnel lens. The Fresnel lens has the function of emitting parallel light and reducing the brightness difference between the center and the surrounding of the picture Function, the double-convex cylindrical lens has the function of imaging and improving the viewin...
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IPC IPC(8): G03B21/60G02B5/02G02B3/08G03B21/602
Inventor 张华张凤楼李文东李文军
Owner 秦皇岛昌隆银幕有限公司