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Automatic convergence comp[ensation equipment and method in back projection TV set

A technology of compensation device and compensation method, which is applied to the parts of color TV, parts of TV system, TV, etc., which can solve the problems of inability to perform convergence compensation more accurately, users' inability to adjust the convergence device arbitrarily, and increase of production cost, etc. , to achieve the effect of low price, lower unit price and improved reliability

Inactive Publication Date: 2006-09-13
LEIJIN ELECTRONIC SHENYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the disadvantage of the traditional convergence compensation device is that since the production cost increases with the increase of the number of photosensors installed around the screen, it will be limited to compensate the convergence error very precisely.
[0011] In addition, since the user cannot adjust the convergence device arbitrarily, there is a disadvantage that convergence compensation cannot be performed more accurately

Method used

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  • Automatic convergence comp[ensation equipment and method in back projection TV set
  • Automatic convergence comp[ensation equipment and method in back projection TV set
  • Automatic convergence comp[ensation equipment and method in back projection TV set

Examples

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example 1

[0044] First, the concept of the present invention is to move the light sensor along the guide line, so that the convergence error can be accurately compensated with a small number of light sensors, and at the same time, the convergence error can be compensated according to the accuracy desired by the user.

[0045] Such as figure 2 Shown, the present invention generally is made of following several parts, namely: display part (12); Light sensor (11); Sensor interface part (13); By erasable programmable read-only memory (EPROM), microcomputer (MICOM) and the system control part (14) that memory constitutes; And comprise the digital convergence control part (15) of driver part (16), RGB (red, green and blue) projection part.

[0046] Wherein, the moving guide line part (17) is arranged on the periphery of the display part (12); and the moving guide line part (17) can be arranged on the back side of the display part (12), or be arranged on the back side of the display part (12)...

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Abstract

The compensation equipment is composed of following parts: display part for displaying image signal; circuit part of moving guide installed around peripheral of the display part; at least one optical sensor moving along with circuit part of moving guide; drive part for moving optical sensor; based on convergence error value detected from output signal of optical sensor, the system control part outputs control signal for controlling drive part; based on control signal of system control part, digital convergence control part compensates convergence error to be displayed on display part. In the invention, circuit part of moving guide moves optical sensor so as to compensate convergence error quickly and correctly.

Description

technical field [0001] The invention relates to the technical field of rear projection televisions, in particular to an automatic convergence compensation device and method for rear projection televisions. Background technique [0002] Generally, a rear-projection TV has red, green, and blue projection tubes; the images projected by these tubes are enlarged through an optical part formed by multiple mirrors and lenses, and then displayed on a large screen, so that the screen can be realized. Upsizing. [0003] However, each projection tube is arranged in line with respect to the screen, so the images projected from each projection tube cannot be completely consistent on the screen, resulting in a decrease in picture definition. [0004] In order to solve this type of problem, all rear projection TVs must have a convergence compensation device that is used to make the images projected by each projection tube on the screen completely correct and consistent. [0005] Generall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/74
Inventor 郑惠天
Owner LEIJIN ELECTRONIC SHENYANG CO LTD