Title:
WIDE VIEWING ANGLE LIQUID CRYSTAL PROJECTION LENS SYSTEM
Document Type and Number:
Japanese Patent JP3105805
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To minimize the height and depth of the system and to provide the image of high contrast by compensating the chromatic aberration of video light from a condenser lens, enlarging the video light by changing over the angle of the optical axis of the image and projecting it on a reflection mirror.
SOLUTION: In a liquid crystal projection display device 20 using a wide viewing angle liquid crystal projection lens system, a condenser lens L9 confronts the optical exit plane of an image constituing element 21 outputting an image for enlarging/projecting it on a screen 24 and converges an inputted light beam of the image. A first lens group G1 compensates the chromatic aberration of the light beam of image and a second lens group G2 changes over the angle of the optical axis of image transmitted from the first lens group G1. A third lens group G3 enlarges the light of image transmitted from the second lens group G2 and projects it on a reflection mirror 23. Consequently, the height H' and the deoth D' of the system are reduced and the bright image of high contrast is obtained.
Inventors:
Kim Dong Ha
Application Number:
JP32714596A
Publication Date:
November 06, 2000
Filing Date:
December 06, 1996
Export Citation:
Assignee:
Samsung Electronics Co.,Ltd.
International Classes:
G02F1/13; G02B13/16; G02B27/18; G02B27/28; G03B21/10; H04N5/72; H04N5/74; H04N9/31; (IPC1-7): G02B27/28; G02B27/18; G02F1/13; G03B21/10; H04N5/74; H04N9/31
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)
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