Projection-type display device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorYoshiharu Hirakata
Life of this patent
Estimating the term…
Abstract
A rear-type projection display device is provided, in which even a liquid crystal panel having several point defects is used, the point defects are hardly recognized. According to the present invention, in order not to display the display defects (the bright spots or unlit defects) that take place when a light from a light source transmits a liquid crystal panel having the point defects, means for correcting the display defects is provided on the liquid crystal panel side of a screen.
Claims99
A projection-type display device comprising:
- a screen, said screen enabling an image to be observed from a screen surface side;
- at least an electro luminescence element;
- and
- a light shielding object preventing a point defect of the an electro luminescence element from being observed on the screen when a black image is displayed on the screen.
A projection-type display device comprising:
- a screen, said screen enabling an image to be observed from a screen surface side;
- at least an electro luminescence element;
- and
- a light collecting object preventing a point defect of the electro luminescence element from being observed on the screen when a white image is displayed on the screen.
A projection-type display device comprising:
- an electro luminescence element;
- a screen for displaying an image of said electro luminescence element;
- and
- means for correcting a display malfunction on the screen caused by a point defect of said electro luminescence element, said means provided over a portion of the screen.
A projection-type display device comprising:
- a screen, said screen enabling an image to be observed from a screen surface side;
- at least a PDP element;
- and
- a light shielding object preventing a point defect of the PDP element from being observed on the screen when a black image is displayed on the screen.
A projection-type display device comprising:
- a screen, said screen enabling an image to be observed from a screen surface side;
- at least a PDP element;
- and
- a light collecting object preventing a point defect of the PDP element from being observed on the screen when a white image is displayed on the screen.
A projection-type display device comprising:
- a PDP element;
- a screen for displaying an image of said PDP element;
- and
- means for correcting a display malfunction on the screen caused by a point defect of said PDP element, said means provided over a portion of the screen.
A projection-type display device according to claim 93, wherein the light collecting object comprises a lens with a shape of elliptical hemisphere, cone, or planoconvex.
Dependencies are inferred from the claim text.