Patent ID: 6646704
Filing Date: 2003-11-11
Classification: G02F

Abstract:
A projection device fitted with a liquid crystal light modulator which comprises,a semiconducting substrate (1) on which transistor arrays and control circuits are provided, a first insulating layer (3) provided physically upon the substrate (1), a light-reflecting layer (4) provided physically upon the first insulating layer (3) opposite the substrate (1), a second insulating layer (5) provided physically upon the light-reflecting layer (4) opposite the first insulating layer (3), at least two pixel electrodes (6) provided physically upon the second insulating layer (5) opposite the light-reflecting layer (4), wherein each pixel electrode (6) is physically connected to a transistor (2) through a contact hole (10) which is filled with an electrically conducting material, and wherein the wall of the contact hole (10) is fully covered with a third insulating layer (11) such that the contact hole (10) is insulated from physically contacting the first insulating layer (3), the light-reflecting layer (4) or the second insulating layer (5), a liquid crystal unit (7) provided physically upon both the second insulating layer (5) opposite the light-reflecting layer (4) and each pixel electrode (6) opposite the second insulating layer (5), a cover electrode (8) provided physically upon the liquid crystal unit (7) opposite the second insulating layer (5) and each pixel electrode (6), and a front plate (9) provided physically upon the cover electrode (8) opposite the liquid crystal unit (7).