Defective pixel compensation system and display device using the system
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorMasaaki Hiroki
Life of this patent
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Abstract
With respect to a display device having a high-resolution display panel, It makes possible to prevent to deteriorate the display quality by a dot defect. A display panel having a dot defect is identified and coordinates of the defective pixel are determined. The brightnesses of pixels adjacent to the defective pixel and/or the brightnesses of pixels of other display panels having the corresponding coordinates as the dot defect are increased to reduce the apparent perceptibility of the dot defect.
Claims14
A defective pixel compensation system for a projection display device having three display panels, each of said three display panels displaying only one color image, said system comprising:
- means for specifying a display panel having a defective pixel out of the three display panels;
- means for specifying coordinates of the defective pixel;
- and
- means for increasing a brightness of at least one of the pixels having a same coordinates as the defective pixel in the display panels other than said display panel having the defective pixel.
A defective pixel compensation system for a projection display device having three display panels, said system comprising:
- means for specifying a display panel having a defective pixel out of the three display panels;
- means for determining coordinates of the defective pixel;
- means for increasing a brightness of at least one of the pixels having coordinates adjacent to the coordinates of the defective pixel;
- and
- means for increasing a brightness of pixels having a same coordinates as the defective pixel in the display panels other than said display panel having the defective pixel.
A defective pixel compensation system for a display device comprising a plurality of display panels, each of said plurality of display panels displaying only one color image, said system comprising:
- means for specifying a display panel comprising a defective pixel out of the plurality of display panels;
- means for specifying coordinates of the defective pixel;
- and
- means for increasing a brightness of at least one of pixels having a same coordinates as the defective pixel in the display panels other than the display panel comprising the defective pixel.
A projection display device comprising:
- a light source;
- an optical system for separating light emitted from said light source into three fluxes of light;
- three display panels including one display panel having at least one defective pixel, wherein each of said three display panels displays only one color image;
- an optical system for combining images of said three display panels to project the images onto a screen;
- and
- a defective pixel compensation system for increasing a brightness of pixels having a same coordinates as the at least one defective pixel in the display panels other than the display panel in which the defective pixel exists.
A projector having at least one circuit to correct data comprising:
- a light source;
- an optical system for separating light emitted from said light source into three;
- three display panels including a display panel having at least one defective pixel, wherein each of said three display panels displays only one color image;
- and
- an optical system for combining images of said three display panels,
- wherein said at least one circuit has a function of correcting data to increase a brightness of a pixel having a same coordinates as said at least one defective pixel in the display panels other than said display panel having at least one defective pixel.
An operating method of a projector having three display panels comprising the steps of:
- specifying a display panel having a defective pixel out of said three display panels;
- specifying coordinates of said defective pixel;
- and
- forming data for increasing a brightness of at least one of the pixels having a same coordinates as said defective pixel in the display panels other than said display panel having said defective pixel,
- wherein each of said three display panels displays only one color image.
Dependencies are inferred from the claim text.