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Method for eliminating stray light of projector

A projector, stray light technology

Inactive Publication Date: 2020-04-10
HENAN COSTAR GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are two mainstream methods of using fly-eye lens and light guide column in the existing projector lighting system. Because the light guide column is cheap, various manufacturers use more light guide column. The opening of the light column cannot be completely larger than the light point of the light source entering the light, so the excess part will be projected to the invalid area of ​​the DMDPanel through the total reflection of the glass, causing stray light to appear, thereby affecting the viewing quality

Method used

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  • Method for eliminating stray light of projector
  • Method for eliminating stray light of projector
  • Method for eliminating stray light of projector

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Embodiment Construction

[0014] The present invention is to eliminate the stray light outside the projector screen, so the source of the stray light is the total reflection of the glass layer of the light guide column through simulation, so the glass layer of the light guide column is painted black and simulated as Figure 1-Figure 5 as shown, figure 1 It shows that the light guide column is totally reflected by the light exiting from the glass layer, Figure II Display stray light in the invalid area of ​​DMD Panel, Figure three It shows that there is no stray light in the invalid area of ​​the DMD Panel after the light guide column is blackened. Figure four After the box simulation, the glass layer light of the light guide column, Figure 5 It shows that there is no stray light after the blackening countermeasure of the light guide column.

[0015] Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modif...

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Abstract

The invention discloses a method for eliminating the stray light of a projector. The stray light of the projector can be effectively eliminated by blackening a light guide column glass layer on the projector. Compared with the prior art, the stray light outside a projector picture can be eliminated by blackening the light guide column glass layer of the projector, and the method is simple, and islow in cost and better in effect.

Description

technical field [0001] The invention relates to the technical field of using a projector, in particular to a method for eliminating stray light from a projector. Background technique [0002] There are two mainstream methods of using fly-eye lens and light guide column in the existing projector lighting system. Because the price of the light guide column is cheap, various manufacturers use more light guide columns. The opening of the beam of light cannot be completely larger than the light spot of the light source that enters the light, so the excess part will be totally reflected by the glass and projected to the invalid area of ​​the DMDPanel, causing stray light to appear, thereby affecting the viewing quality. Contents of the invention [0003] In order to solve the above-mentioned defects, the present invention provides a method for eliminating stray light of a projector, which can effectively eliminate the occurrence of stray light, and is of great significance for i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14
CPCG03B21/14
Inventor 许建文林明德王柏林高亚男侯艳磊
Owner HENAN COSTAR GRP CO LTD