Motion-blur compensation in backlit displays
First Claim
Patent Images
1. A method for operating a display comprising a spatially-modulatable backlight having a plurality of individually-controllable light sources illuminating a spatial light modulator having a plurality of individually-controllable light modulating elements, the method comprising:
- controlling the spatially-modulatable backlight to display an approximation of an image;
refreshing the spatial light modulator by sequentially refreshing a plurality of sections of the spatial light modulator, each section comprising at least one of the plurality of the individually-controllable light modulating elements;
while refreshing one of the sections of the spatial light modulator, reducing an instantaneous brightness of the light emitted by a group of one or more of the individually-controllable light sources of the spatially-modulatable backlight, the group corresponding to the one section, to less than a brightness of the approximation of the image at an image area corresponding to the section; and
,overdriving the group of individually-controllable light sources of the spatially-modulatable backlight at a time when the one section of the spatial light modulator is not being refreshed to increase the instantaneous brightness of the light emitted by the group of individually-controllable light sources to more than the brightness of the approximation of the image at the image area corresponding to the section.
4 Assignments
0 Petitions
Accused Products
Abstract
A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. The screen is illuminated with light from a light source comprising an array of controllable light-emitters. The controllable-emitters and elements of the light modulator may be controlled to adjust the intensity of light emanating from corresponding areas on the screen. The display may provide a high dynamic range.
-
Citations
22 Claims
-
1. A method for operating a display comprising a spatially-modulatable backlight having a plurality of individually-controllable light sources illuminating a spatial light modulator having a plurality of individually-controllable light modulating elements, the method comprising:
-
controlling the spatially-modulatable backlight to display an approximation of an image; refreshing the spatial light modulator by sequentially refreshing a plurality of sections of the spatial light modulator, each section comprising at least one of the plurality of the individually-controllable light modulating elements; while refreshing one of the sections of the spatial light modulator, reducing an instantaneous brightness of the light emitted by a group of one or more of the individually-controllable light sources of the spatially-modulatable backlight, the group corresponding to the one section, to less than a brightness of the approximation of the image at an image area corresponding to the section; and
,overdriving the group of individually-controllable light sources of the spatially-modulatable backlight at a time when the one section of the spatial light modulator is not being refreshed to increase the instantaneous brightness of the light emitted by the group of individually-controllable light sources to more than the brightness of the approximation of the image at the image area corresponding to the section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
Specification