Display Driver Voltage Compensation for IR Drop Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatuses face challenges in reducing power consumption while maintaining display quality due to voltage drops (IR drops) when determining power voltage based solely on maximum grayscale values, leading to suboptimal performance.
Innovation Solution
A display apparatus and method that generate power voltage based on the position of the maximum load block within the display panel, considering both the maximum grayscale value and total load of input image data, by adding compensation values or scale factors to the power voltage, thereby optimizing power distribution and reducing voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power voltage level is determined solely based on the maximum grayscale value, then the device complexity is reduced, but the display quality deteriorates and power consumption is not effectively reduced due to voltage drops
Solution Approach 1:
The patent applies local quality by determining power voltage levels based on the spatial position of the maximum load block within the display panel. Different regions of the display panel receive different power voltage compensation values according to their distance from the power voltage application point, thereby addressing local voltage drop variations and improving overall display quality without excessive complexity
Solution Approach 2:
The patent implements feedback by using sensing signals from pixels to identify the position of the maximum load block, then adjusting the power voltage level accordingly. This closed-loop approach allows the system to adaptively compensate for voltage drops based on actual load distribution, improving display quality and power efficiency
2Ease of operation
If the power voltage level is determined solely based on the maximum grayscale value, then the control simplicity is maintained, but power consumption cannot be effectively reduced due to unaccounted voltage drops
Solution Approach 1:
The patent changes the parameters used for power voltage determination from only maximum grayscale value to include both maximum grayscale value and position of maximum load block. This allows the system to optimize power consumption by adjusting voltage levels according to actual power distribution needs while maintaining manageable control complexity
Solution Approach 2:
The patent applies partial compensation by adding compensation values only to regions experiencing voltage drops, rather than uniformly increasing power voltage across the entire display panel. This targeted approach reduces overall power consumption while effectively addressing voltage drop issues in specific areas
Data Source
AI summary
A display apparatus including: a display panel including a plurality of display blocks; and a display panel driver configured to generate a power voltage based on a maximum grayscale value of input image data and a position of a maximum load block among the display blocks and configured to output the power voltage to the display panel, wherein the maximum load block has a largest load of the input image data among the display blocks.