Display Device Data Driver Gamma Voltage Precision Power Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in reducing power consumption when generating gamma voltages, which are crucial for maintaining image quality and efficiency.
Innovation Solution
The implementation of a data driver system that includes master and slave gamma blocks, decoders, and multiplexers, where the enable/disable states of amplifiers are managed based on maximum luminance levels using look-up tables, allowing for efficient generation of gamma voltages by selectively enabling amplifiers based on luminance requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all master amplifiers are enabled to generate full gamma voltage range, then gamma voltage precision and image quality are maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic control of master amplifier enable/disable states based on maximum luminance levels. The data driver selectively enables or disables master amplifiers according to the required luminance range, transitioning from static full-operation mode to dynamic adaptive mode, thereby reducing power consumption while maintaining gamma voltage precision when needed
Solution Approach 2:
The patent changes the operational parameters of master amplifiers by adjusting their enable/disable states based on maximum luminance levels. Different luminance levels (e.g., 400 nits, 800 nits, 1200 nits) correspond to different amplifier configurations, allowing the system to adapt power consumption to actual display requirements while preserving gamma voltage precision when high precision is needed
2Use of energy by moving object
If fewer master amplifiers are enabled to reduce power consumption, then power efficiency improves, but gamma voltage range and precision may be compromised
Solution Approach 1:
The patent applies partial action by enabling only the necessary number of master amplifiers based on maximum luminance requirements. Instead of always operating all amplifiers, the system activates exactly enough amplifiers to cover the required gamma voltage range, avoiding excessive power consumption while maintaining sufficient precision for the current display conditions
Solution Approach 2:
The patent segments the master amplifier operations into different groups based on luminance levels. By dividing the amplifier operations into level-specific configurations, the system can selectively activate only the segments (amplifiers) needed for current maximum luminance requirements, thereby maintaining precision where needed while reducing overall power consumption
3Use of energy by moving object
If amplifier enable/disable control is implemented based on maximum luminance, then power consumption is optimized, but system complexity increases due to additional control logic
Solution Approach 1:
The patent implements preliminary action by pre-establishing the relationship between maximum luminance levels and master amplifier configurations. The system prepares enable/disable control signals in advance based on detected maximum luminance, avoiding complex real-time calculations and simplifying the control logic through pre-defined operational modes
Data Source
AI summary
A display device of the invention includes a pixel unit including first pixels which display a first color; and a data driver which supplies first data voltages to the first pixels. The data driver includes: a first master gamma block including first master amplifiers which generate first reference gamma voltages; a first slave gamma block which generates first gamma voltages by dividing the first reference gamma voltages; and a first decoder which provides some of the first gamma voltages as the first data voltages, and each of the first master amplifiers is enabled or disabled based on a maximum luminance of the pixel unit.