Method for eliminating latent images on display devices
AssigneeRockwell Collins, Inc.
InventorBrian P. Dehmlow
Life of this patent
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Abstract
A method of compensating for differential aging of independent emitters in a display is disclosed. According to the method, an image on the display is periodically sampled to determine how often each independent emitter is used. A history is compiled of the use of each independent emitter for a predetermined time. The amount of luminance decay that each independent emitter has experienced over the predetermined time is estimated. The maximum luminance of each independent emitter is adjusted so that the maximum luminances of all of the independent emitters is substantially the same as the maximum luminance of the independent emitter that has experienced the most decay.
Claims11
A method of compensating for differential aging of independent emitters in a display, wherein each independent emitter has a maximum luminance that decays with use, comprising:
- periodically sampling an image to determine how often each independent emitter is used;
- compiling a history of use of each independent emitter for a predetermined time;
- estimating how much luminance decay that each independent emitter has experienced over the predetermined time;
- and
- adjusting the maximum luminance of each independent emitter so that the maximum luminances of all of the independent emitters is substantially the same as the maximum luminance of the independent emitter that has experienced the most decay.
A method of reducing the visibility of latent images on a display, the display having a plurality of independently controllable pixels, wherein each pixel has a maximum luminance that decays over time, the method comprising:
- attaching a controller to the display, wherein the controller is configured to receive display image data, the controller being further configured to control the luminance of each pixel based on a desired image;
- periodically sampling the display image data to determine whether each pixel is being used;
- storing a usage history of each pixel in a memory, wherein the usage history comprises the results of a plurality of periodic samples of the display image data;
- after a predetermined number of samplings, estimating the luminance decay of each pixel based at least in part on the usage history of each pixel;
- and
- adjusting the maximum luminance of each pixel so that the maximum luminances of the plurality of pixels appear to have equal age-related decay.
Dependencies are inferred from the claim text.