KR960013013A - Projection type liquid crystal display device - Google Patents

Projection type liquid crystal display device Download PDF

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Publication number
KR960013013A
KR960013013A KR1019940023858A KR19940023858A KR960013013A KR 960013013 A KR960013013 A KR 960013013A KR 1019940023858 A KR1019940023858 A KR 1019940023858A KR 19940023858 A KR19940023858 A KR 19940023858A KR 960013013 A KR960013013 A KR 960013013A
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KR
South Korea
Prior art keywords
liquid crystal
display device
crystal display
projection type
type liquid
Prior art date
Application number
KR1019940023858A
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Korean (ko)
Inventor
노봉규
김진승
Original Assignee
노봉규
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 노봉규 filed Critical 노봉규
Priority to KR1019940023858A priority Critical patent/KR960013013A/en
Publication of KR960013013A publication Critical patent/KR960013013A/en

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Abstract

본 발명은 빛의 이용효율을 높여 화면을 밝게한 투사형 액정표시장치(LCD PROJECTION)의 광학계에 관한것이다. 종래 투사형 액정표시장치에서는 액정셀 앞에있는 편광판의 투과측에 나란한 직선편광 성분만 액정셀 편광을 변조시키기 때문에 빛의 이용효율이 50% 미만으로 화면이 어둡다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical system of a projection type liquid crystal display device (LCD PROJECTION) that brightens a screen by increasing light utilization efficiency. In the conventional projection type liquid crystal display device, since only the linearly polarized light component parallel to the transmission side of the polarizing plate in front of the liquid crystal cell modulates the liquid crystal cell polarization, the screen utilization is dark with less than 50% of light utilization efficiency.

본 발명에서는 편광광속분할기(polarizing beam splitter:PBS)를 써서 PBS를 지나 직선편광된 두 빛을 액정셋에 반대의 경로로 지나게한 후 다시 PBS를 지나게함으로써 빛의 이용효율을 높여 화면을 밝게하였다.또한 액정셋 앞뒤로 λ/4 위상판을 두 장 놓아 액정셋에 전압을 크게 걸었을때 완전 소광되게하여 콘트라스트비를 크게하여 화면을 선명하게 하였다.In the present invention, a polarizing beam splitter (PBS) is used to pass two polarized light through the PBS in the opposite path to the liquid crystal set and then pass the PBS again to increase the utilization efficiency of light to brighten the screen. In addition, two λ / 4 phase plates were placed in front of and behind the LCD set to completely extinguish when a large voltage was applied to the LCD set.

본 발명의 투사형액정표시장치는 HD TV, 대화면 TV등에 쓰일수 있다.The projection type liquid crystal display device of the present invention can be used for HD TV, big screen TV and the like.

Description

투사형 액정표시장치Projection type liquid crystal display device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제4도는 본 발명의 투사형 액정표시소자의 한 예.4 is an example of the projection type liquid crystal display device of the present invention.

제5도는 본 발명의 칼라투사형 액정표시소자의 한 예.5 is an example of a color projection liquid crystal display device of the present invention.

Claims (2)

광원(1)에서 나온 빛을 편광광속분할기(13)를 지니게 하여 직교하는 두 직선편광으로 나누어 두 직선편광된 빛을 서로 반대방향인 경로로 액정셋(8) 지나가게하고, 액정셋을 지난 두 빛을 편광광속분할기(13)에서 합한 투사형 액정표시장치The light emitted from the light source 1 is divided into two orthogonal linearly polarized light having a polarized light beam splitter 13 so that the two linearly polarized light passes through the liquid crystal set 8 in a path opposite to each other, Projection type liquid crystal display device in which light is combined in polarized light splitter (13) 제1항에있어서 액정셋(8) 앞이나 뒤에 λ/2위상판이 1장 붙었거나 또는 액정셋 앞 뒤로 λ/4위상판이 2장붙은 투사형 액정표시장치The projection type liquid crystal display device according to claim 1, wherein one λ / 2 phase plate is attached to the front or rear of the liquid crystal set 8, or two λ / 4 phase plates are attached to the front and rear of the liquid crystal set. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940023858A 1994-09-15 1994-09-15 Projection type liquid crystal display device KR960013013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940023858A KR960013013A (en) 1994-09-15 1994-09-15 Projection type liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940023858A KR960013013A (en) 1994-09-15 1994-09-15 Projection type liquid crystal display device

Publications (1)

Publication Number Publication Date
KR960013013A true KR960013013A (en) 1996-04-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940023858A KR960013013A (en) 1994-09-15 1994-09-15 Projection type liquid crystal display device

Country Status (1)

Country Link
KR (1) KR960013013A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100742101B1 (en) * 1996-08-19 2007-12-31 세이코 엡슨 가부시키가이샤 Projection Display

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100742101B1 (en) * 1996-08-19 2007-12-31 세이코 엡슨 가부시키가이샤 Projection Display

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