Adaptive Gamma Voltage Adjustment for Display Power Management
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Solution Overview
Problem
Display devices with high refresh rates and high picture quality experience excessive power consumption and overheating when displaying heavy-loaded pictures, leading to potential damage of the source driver and increased production costs.
Innovation Solution
A method of adjusting the gamma voltage for heavy-loaded pictures by reducing the voltage value of the analog power supply voltage to a second gamma voltage, which is less than the first gamma voltage, to minimize power consumption and prevent overheating, while maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high refresh rates and high picture quality are implemented, then display quality is improved, but power consumption increases excessively
Solution Approach 1:
The patent applies dynamics by making the gamma voltage adaptive rather than fixed. The system dynamically adjusts gamma voltage based on picture complexity assessment, switching between different gamma voltage modes (first gamma voltage for heavy-loaded pictures, second gamma voltage for normal pictures) to optimize power consumption while maintaining display quality
Solution Approach 2:
The patent changes the voltage parameter of gamma signals based on picture characteristics. By detecting picture complexity and adjusting gamma voltage levels accordingly, the system reduces power consumption for heavy-loaded pictures while maintaining high display quality for normal pictures
2Manufacturing precision
If high refresh rates and high picture quality are implemented, then display quality is improved, but the source driver overheats
Solution Approach 1:
The system dynamically adjusts gamma voltage based on picture complexity to control source driver temperature. By switching between first gamma voltage (for heavy-loaded pictures) and second gamma voltage (for normal pictures), the system prevents overheating while maintaining display quality
Solution Approach 2:
The patent applies preliminary anti-action by proactively reducing gamma voltage before the source driver overheats. The system assesses picture complexity in advance and adjusts gamma voltage accordingly, preventing temperature rise that would damage the source driver
3Temperature
If a heat sink or high-specification chip is added to solve overheating, then the overheating problem is resolved, but production cost increases
Solution Approach 1:
The patent changes the gamma voltage parameter software-controlled rather than using hardware modifications. By adjusting voltage levels through control signals based on picture complexity, the system reduces source driver temperature without adding heat sinks or expensive high-specification chips, maintaining ease of manufacture
Solution Approach 2:
The patent replaces the mechanical/physical solution (heat sinks, high-specification chips) with an electrical control solution (adaptive gamma voltage adjustment). This substitution eliminates the need for additional hardware components, reducing production cost while effectively managing source driver temperature
4Use of energy by moving object
If gamma voltage is reduced to lower power consumption, then power consumption is reduced, but display quality may deteriorate
Solution Approach 1:
The patent applies local quality by differentiating gamma voltage adjustment based on picture complexity. Instead of uniformly reducing gamma voltage for all pictures, the system selectively reduces voltage only for heavy-loaded pictures while maintaining normal voltage for other pictures, preserving display quality where needed while reducing power consumption where appropriate
Data Source
AI summary
The present application discloses a display device and a driving method thereof. The method of driving the display device includes: acquiring a picture to be displayed; determining whether the picture to be displayed is a heavy-loaded picture; adjusting a first gamma voltage corresponding to the picture to be displayed to a second gamma voltage if the picture to be displayed is the heavy-loaded picture, wherein corresponding to a same gray scale, a voltage value of the second gamma voltage is less than a voltage value of the first gamma voltage; and driving the display device to display the picture to be displayed according to the second gamma voltage.