Back to results
US 5,227,820 AGranted
Shading device of the LCD projecting plate
AssigneeCTX-Electronics Corporation
InventorsKazuhiro Miyashita, Chia-Chen Liao, Chien-Chung Chang
Life of this patent
Estimating the term…
Abstract
A shading device of LCD projecting plate has a pair of shading board being capable of being adjusted to shade the rest projecting areas which are uncovered by the plate and to project the drawing or letters on the optical glass to a wall or a screen clearly whenever used with any projectors.
Claims1
A shading device for an LCD projection plate member located on a projection plane of a projector comprising:
- (a) a projection plate member having a pair of guide recesses formed within a bottom section of said projection plate member, said guide recesses extending in a longitudinal direction and being transversely displaced each from the other on opposing transverse ends of said projection plate member;
- (b) a pair of shading board members slidably insertable within said guide recesses, each of said shading board members having a pair of longitudinally directed and transversely displaced through openings for insert therethrough of respective threaded members for securement to said bottom section of said projection plate member, whereby said shading board members may be longitudinally displaced to cover said projection plane external to said LCD projection plate member.
Dependencies are inferred from the claim text.