KR930006497A - Projector with keystone correction - Google Patents
Projector with keystone correction Download PDFInfo
- Publication number
- KR930006497A KR930006497A KR1019910016928A KR910016928A KR930006497A KR 930006497 A KR930006497 A KR 930006497A KR 1019910016928 A KR1019910016928 A KR 1019910016928A KR 910016928 A KR910016928 A KR 910016928A KR 930006497 A KR930006497 A KR 930006497A
- Authority
- KR
- South Korea
- Prior art keywords
- projector
- parallel
- object portion
- image
- light
- Prior art date
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- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
본 발명은 투사기의 상하향 투사시 스크린영상에 나타나는 키스톤 현상을 보정하는 기술에 관한 것이다. 물체부와 결상렌즈부사이에 빛의 방향을 전환하는 기능을 갖는 미러가 평행이동 캐리어에 착설되어 물체부에 대해 평행이동 된다.The present invention relates to a technique for correcting the keystone phenomenon appearing on the screen image when the projector is projected up and down. A mirror having a function of changing the direction of light between the object portion and the image forming lens portion is mounted on the parallel carrier to move in parallel with the object portion.
특히, 본 발명은 3-판넬형 LCD 투사기에 적용된다.In particular, the present invention is applied to a three-panel LCD projector.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 투사기의 광학RP와 스크린영상을 보인 설명도.1 is an explanatory diagram showing the optical RP and the screen image of the projector.
제2도는 투사기의 상향투사시 나타나는 키스톤현상을 설명하는 제1도 유사한 설명도.FIG. 2 is an explanatory diagram similar to FIG. 1 for explaining a keystone phenomenon appearing when the projector is projected upward.
제3도는 키스톤 현상을 보정하는 방법의 한 예를 보인 제1도와 유사한 설명도.FIG. 3 is an explanatory diagram similar to FIG. 1 showing an example of a method of correcting a keystone phenomenon. FIG.
Claims (2)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910016928A KR930006497A (en) | 1991-09-27 | 1991-09-27 | Projector with keystone correction |
US07/815,115 US5283602A (en) | 1990-12-29 | 1991-12-27 | Optical system for projector |
JP3346668A JPH04296737A (en) | 1990-12-29 | 1991-12-27 | Optical system for projector |
DE4143221A DE4143221C2 (en) | 1990-12-29 | 1991-12-30 | Optical system for a projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910016928A KR930006497A (en) | 1991-09-27 | 1991-09-27 | Projector with keystone correction |
Publications (1)
Publication Number | Publication Date |
---|---|
KR930006497A true KR930006497A (en) | 1993-04-21 |
Family
ID=67433260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019910016928A KR930006497A (en) | 1990-12-29 | 1991-09-27 | Projector with keystone correction |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR930006497A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100333970B1 (en) * | 1999-08-31 | 2002-04-24 | 구자홍 | Projective Display Apparatus With Function Of Eliminating Keystone |
KR100466104B1 (en) * | 1997-02-05 | 2005-04-20 | 주식회사 엘지이아이 | LCD Projector and Keystone Correction System Used in It |
-
1991
- 1991-09-27 KR KR1019910016928A patent/KR930006497A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100466104B1 (en) * | 1997-02-05 | 2005-04-20 | 주식회사 엘지이아이 | LCD Projector and Keystone Correction System Used in It |
KR100333970B1 (en) * | 1999-08-31 | 2002-04-24 | 구자홍 | Projective Display Apparatus With Function Of Eliminating Keystone |
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