Compensation accuracy
A system uses image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device by dividing each frame into at least first and second sub-frames, supplying the image data during one of the sub-frames, supplying compensation data during the other of the sub-frames, compensating image data based on the compensation data, and supplying each pixel with a drive current that is based on the compensated image data during each frame. The compensated image data may be supplied from a driver having a preselected data resolution, and the system determines whether the compensated image data is greater than the data resolution of the driver, and if the compensated image data is greater than the data resolution of the driver, transfers the excess compensated image data to a different sub-frame.
1. A method of driving a display, the display for displaying image data in successive frames and having pixels that include a drive transistor and an organic light emitting device and a driver for driving the pixels, said method comprising:
displaying with a pixel, within a time duration, compensation data and image data together exceeding a data resolution of the driver by
subdividing the time duration into a plurality of time-frames, and
dividing the compensation data and the image data among said time-frames to drive the pixel during each time-frame with a total amount of data which does not exceed the data resolution of the driver.
2. The method of claim 1 further comprising:
prior to dividing the compensation data and the image data, determining whether the compensation data and the image data to be displayed within the time duration together exceeds the data resolution of the driver.
3. The method of claim 1 , wherein the compensation data is for compensation for at least one of performance and a property of the pixel.
4. The method of claim 1 wherein said compensation data is divided substantially equally among said time-frames, and any residue value is supplied to one of the time-frames.
5. The method of claim 1 wherein said time-frames have different time-frame durations.
6. The method of claim 5 wherein dividing the compensation data and the image data comprises determining that a first time-frame is to be driven with the image data and that at least one other time-frame is to be driven with the compensation data, wherein the first time-frame is longer in duration than each of the at least one other time-frame.
7. The method of claim 1 , wherein dividing the compensation data and the image data comprises:
dividing the compensation data among the plurality of time-frames, and
supplying the pixel with a drive current that is based on data comprising a division of said compensation data during each time-frame into which said compensation data is divided.
8. The method of claim 7 , further comprising remapping the image data to a new bit range defined by the total number of bits available in all time-frames of the time duration and the number of bits of said compensation data.
9. An apparatus for driving a display, the display for displaying image data in successive frames and having an array of pixels that each include a drive transistor and an organic light emitting device, said apparatus comprising:
a source driver for driving the pixels adapted to
display with a pixel, within a time duration, compensation data and image data together exceeding a data resolution of the source driver by
subdividing the time duration into a plurality of time-frames, and
dividing the compensation data and the image data among said time-frames to drive the pixel during each time-frame with a total amount of data which does not exceed the data resolution of the source driver.
10. The apparatus of claim 9 wherein said source driver is further adapted to, prior to dividing the compensation data and the image data, determining whether the compensation data and the image data to be displayed within the time duration together exceeds the data resolution of the source driver.
11. The apparatus of claim 9 , wherein the compensation data is for compensation for at least one of performance and a property of the pixel.
12. The apparatus of claim 9 wherein said source driver is adapted to divide said compensation data substantially equally among said time-frames, and any residue value is supplied to one of the time-frames.
13. The apparatus of claim 9 wherein said time-frames have different time-frame durations.
14. The apparatus of claim 13 wherein the source driver is adapted to, when dividing the compensation data and the image data, determine that a first time-frame is to be driven with the image data and that at least one other time-frame is to be driven with the compensation data, wherein the first time-frame is longer in duration than each of the at least one other time-frame.
15. The apparatus of claim 13 wherein the source driver is adapted to, when dividing the compensation data and the image data,
divide the compensation data among said plurality of time-frames, and
supply the pixel with a drive current that is based on data comprising a division of said compensation data during each time-frame into which said compensation data is divided.
16. The apparatus of claim 15 , wherein the source driver is further adapted to remap the image data to a new bit range defined by the total number of bits available in all time-frames of the time duration and the number of bits of said compensation data.