US 6,144,426 AGranted

Liquid crystal projector

AssigneesSemiconductor Energy Laboratory Co., Ltd., Sharp Kabushiki Kaisha

InventorsShunpei Yamazaki, Yoshiharu Hirakata, Takeshi Nishi, Shunichi Naka, Shuhei Tuchimoto, Hiroshi Hamada, Yoshihiro Mizuguchi

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Abstract

A liquid crystal projector in which light is effectively used and an excellent picture can be obtained is provided. In the liquid crystal projector, dichroic mirrors arranged at different angles are used to separate white light into beams of light of three primary colors of R, G, and B, and the respective beams of the light are incident on microlenses at different angles. The respective beams of light of the three primary colors are distributed by the microlenses to optical components corresponding to pixels, and highly collimated light beams can be obtained by the optical components. Since the highly collimated light beams are made incident on the pixels of the liquid crystal panel, the beams can be certainly made incident on desired pixels.

Claims13

Dependent claims

A liquid crystal panel including optical means, said optical means being for irradiating each pixel opening portion of the liquid crystal panel with one of the plurality of color beams which incident upon the liquid crystal panel from different angle each other,

wherein said optical means comprises,
a first optical means for distributing and condensing the separated plurality of color beams with respect to each of the colors, said first optical means being arranged with a pitch of a plurality of pixels of the liquid crystal panel;
a second optical means having a same pitch as the first optical means, said second optical means being for bending principal rays of the plurality of color beams which are distributed by the first optical means to make the beams incident on the liquid crystal panel from an optimum viewing angle direction;
and
a third optical means having a same pitch as the pixels of the liquid crystal panel, said third optical means being for parallelizing diverged beams being passed through the second optical means toward the pixel opening portions.

2 more elements

Dependencies are inferred from the claim text.