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Rear projection display and its image correction circuit and method

An image correction and display technology, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve the problems of inability to correct image deformation, inconvenient image correction methods, and general products without structure.

Inactive Publication Date: 2007-12-12
CHUNGHWA PICTURE TUBES LTD
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Problems solved by technology

Therefore, when the user uses the correction device provided in the prior art, although the image projected on the non-vertical surface can be corrected to a good effect, it can only correct the distortion caused by the non-vertical projection, but cannot correct it. Image distortion caused by high degree curve
[0009] It can be seen that the above-mentioned existing image correction method obviously still has inconvenience and defects, and needs to be further improved urgently.
In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

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  • Rear projection display and its image correction circuit and method
  • Rear projection display and its image correction circuit and method
  • Rear projection display and its image correction circuit and method

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[0046]In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation methods, Structure, method, step, feature and effect thereof are as follows in detail.

[0047] The projection display technology of a projection display is an indirect imaging technology. After using imaging technologies such as cathode ray tube displays, liquid crystal displays, or digital light source processing displays to generate images, the images are projected to a long-distance display using a lens group (projection lens). On the screen, an image that can be perceived by the human eye is formed. Projection displays are generally divided into two types: front projection and rear projection. The main difference lies in which direction the human eye sees the image from the screen. If it is seen from the front, it is us...

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Abstract

The invention relates to an image rectification circuit. It comprises the parameter input unit, file temp storage unit and the geometrical transformation unit. The parameter input unit provides the vertical axial corrective parameter and the horizontal axial corrective parameter. File temp storage unit links the parameter input unit through electricity for the temp storage of vertical axial and horizontal axial corrective parameter. The geometrical transformation unit aims to receive a several picture element drawing material to multiply the vertical axial coordinate and the vertical axial correction parameter to switch each drawing element to a new vertical axial coordinate, and so does the horizontal axial corrective parameter and the coordinate. Finally, it sends the transformed new vertical and horizontal axial coordinates to the display for the viewing of the users.

Description

technical field [0001] The invention relates to an image correction device and method, in particular to an image correction device and method for a projection display. Background technique [0002] With the substantial improvement of computer performance and the high development of Internet and multimedia technology, most of the transmission of image information has changed from analog transmission to digital transmission. In order to adapt to the modern life style, the volume of video or imaging devices tends to be thinner and thinner day by day. Although the traditional cathode ray tube (Cathode Ray Tube, CRT) display still has the advantage of low price, it is bulky and takes up space, and has problems such as radiation damage to eyes when outputting images. [0003] Therefore, recently developed flat panel displays (Flat Panel Displays, FPDs), such as liquid crystal displays (Liquid Crystal Displays, LCDs), organic electroluminescent displays (Organic LightEmitting Diod...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G09G5/00G02F1/133
Inventor 戴文智丘显钧刘家麟莫启能
Owner CHUNGHWA PICTURE TUBES LTD
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