Display Compensation Circuit Gamma Voltage Superposition

The patent divides the compensation function into two separate modules: a first compensation module that generates compensation voltage based on common electrode voltage variations, and a second compensation module that superposes this compensation voltage onto gamma voltage. This segmentation allows the compensation function to be distributed across multiple components, reducing the temperature burden on any single component while maintaining effective compensation for image quality.

The patent introduces gamma voltage as an intermediary carrier. Instead of directly applying compensation voltage to the common electrode (which would generate excessive heat), the compensation voltage is superposed onto gamma voltage, which then serves as the intermediate signal that is subsequently processed by the source driver to generate the final data signal. This intermediary approach enables indirect compensation that avoids excessive temperature rise.

The patent uses gamma voltage as an intermediary to transfer the compensation function. The first compensation module generates compensation voltage based on common electrode voltage variations, but instead of applying it directly to the common electrode, it is superposed onto gamma voltage by the second compensation module. This intermediary approach maintains voltage stability while avoiding excessive temperature increase that would result from direct application.

The compensation voltage is generated in advance by the first compensation module based on detected variations in common electrode voltage. This preliminary generation of compensation voltage allows the system to prepare the corrective signal before it is needed, and then superpose it onto the gamma voltage in a controlled manner, rather than directly injecting power into the common electrode which would cause overheating.