Display Controller Stress-Based Sub-Pixel Compensation

The patent applies preliminary action by pre-storing stress values corresponding to accumulated image data for each sub-pixel before actual compensation is needed. These stress values are accumulated and stored in advance, allowing the system to perform compensation based on pre-computed data rather than requiring continuous sensing operations, thus reducing power consumption while maintaining luminance uniformity.

The patent uses copying by creating a copy of the sub-pixel's stress state through the stress value storage mechanism. Instead of continuously sensing the actual characteristic values of circuit elements, the system copies the accumulated stress information from image data and uses this copy to determine compensation values, thereby reducing the frequency of sensing operations and lowering power consumption.

The patent introduces an intermediary mechanism by using stress values as a mediator between the actual circuit element characteristics and the compensation values. Instead of directly sensing characteristic values for all sub-pixels, the system uses stress values derived from accumulated image data as an intermediary to infer compensation needs, thereby reducing sensing frequency while maintaining compensation accuracy.

The patent applies extraction by extracting only the necessary stress value information from the accumulated image data for each sub-pixel, rather than extracting or sensing all characteristic values. This selective extraction approach maintains the essential information needed for compensation while significantly reducing the complexity and frequency of sensing operations.