Dynamic Gamma Power Voltage Adjustment for Display Brightness
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Solution Overview
Problem
Display devices face increased power consumption due to high voltage levels required for gamma voltages to compensate for pixel degradation, which affects brightness consistency.
Innovation Solution
A display device with a power controller that adjusts gamma power voltage based on the maximum voltage level of the data signal and includes a lookup table to optimize gamma voltages, reducing power consumption by incorporating a margin setting value to compensate for degradation while minimizing unnecessary voltage ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power voltage is increased to provide a compensation margin for pixel degradation, then brightness consistency is maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of the power voltage level based on actual pixel degradation characteristics. The power controller continuously monitors the maximum voltage level of data signals and adjusts the gamma power voltage accordingly, transitioning from a static high voltage approach to a dynamic adaptive approach that maintains brightness consistency only when necessary.
Solution Approach 2:
The patent changes the voltage level parameter of gamma power dynamically based on the maximum voltage level of data signals. By adjusting the power voltage parameter adaptively rather than maintaining a fixed high level, the system achieves brightness compensation only when pixel degradation requires it, thereby reducing unnecessary power consumption.
2Reliability
If the gamma power voltage is set high to compensate for pixel degradation, then degradation compensation is improved, but voltage range efficiency decreases
Solution Approach 1:
The patent dynamically changes the gamma power voltage parameter based on the maximum voltage level of data signals and pixel degradation characteristics. This adaptive parameter adjustment ensures that the voltage range is optimized for actual needs rather than maintaining a permanently high level, improving voltage range efficiency while preserving degradation compensation capability.
Solution Approach 2:
The patent implements a feedback mechanism where the power controller monitors the maximum voltage level of data signals and adjusts the gamma power voltage accordingly. This closed-loop control ensures that the voltage level is optimized based on actual operating conditions, preventing unnecessary voltage range allocation and improving overall efficiency.
3Reliability
If a fixed high power voltage is used for all operating conditions, then brightness consistency is maintained, but power consumption increases
Solution Approach 1:
The patent transitions from a static fixed high voltage approach to a dynamic adaptive approach. The power controller adjusts the gamma power voltage in real-time based on the maximum voltage level of data signals and actual pixel degradation, ensuring brightness consistency is maintained only when necessary rather than under all conditions.
Solution Approach 2:
The patent implements dynamic parameter changes in the power voltage level based on operating conditions. By adjusting the gamma power voltage parameter adaptively rather than maintaining a fixed high level, the system achieves brightness consistency when needed while reducing power consumption during normal operation.
Data Source
AI summary
A display device includes: a display panel including a plurality of pixels; a power supply configured to generate a gamma power voltage based on a power control signal; a gamma voltage generator configured to generate gamma voltages based on the gamma power voltage and a gamma control signal; a data driver configured to generate a data signal corresponding to a grayscale value included in image data using the gamma voltages and to provide the data signal to the pixels; and a power controller configured to adjust the power control signal and the gamma control signal based on a maximum voltage level of the data signal, wherein a voltage level of the gamma power voltage is proportional to the maximum voltage level of the data signal.