DRIVING APPARATUS AND DRIVING METHOD FOR AN ORGANIC LIGHT EMITTING DEVICE
First Claim
1. A driving apparatus for an organic light emitting device having pixels with light-emitting devices, wherein uniform values based on voltages for each frame corresponding to grays of input image signals are calculated and summed, and data voltages are increased when the sum exceeds a predetermined value.
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Accused Products
Abstract
A driving apparatus for an organic light emitting device including pixels with light-emitting devices and a method of making such apparatus are presented. The uniform values based on voltages for each frame corresponding to grays of input image signals are calculated and summed, and data voltages are increased when the sum exceeds a predetermined value. The apparatus helps maintain the desired brightness in an organic light emitting diode (OLED) display device through the lifespan of the device.
151 Citations
22 Claims
- 1. A driving apparatus for an organic light emitting device having pixels with light-emitting devices, wherein uniform values based on voltages for each frame corresponding to grays of input image signals are calculated and summed, and data voltages are increased when the sum exceeds a predetermined value.
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13. A driving method of an organic light emitting device having pixels with a light-emitting device, comprising:
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calculating uniform values based on voltages for each frame corresponding to grays of first image signals; generating a sum of the uniform values; expanding the number of grays of the first image signals to generate second image signals; reducing the number of grays of the second image signals along with compression of the corresponding voltages to generate the third image signals; sequentially increasing bits according to a predetermined output signal; adding the third image signals and the increased bits to generate fourth image signals; and reducing the number of grays of the fourth image signals to generate fifth image signals. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification