Color-Specific Margin Voltage Setting for Stable Black Image Display
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Solution Overview
Problem
Existing display devices face increased power consumption due to the addition of a margin voltage to prevent black image failure under varying power voltages, which is uniformly applied across all colors.
Innovation Solution
A display device and method that sets margin voltages individually for each color based on a dominant color determined through test images, using a margin voltage setting unit to analyze luminance and color coordinates, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a margin voltage is added to prevent black image failure under varying power voltages, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent segments the margin voltage application by color channel. Instead of uniformly applying margin voltage to all color channels (R, G, B), the system determines the dominant color of the display device and applies margin voltage only to the corresponding color channel. This segmentation reduces unnecessary power consumption while maintaining black image display stability for the dominant color channel.
Solution Approach 2:
The patent implements local quality by making the margin voltage setting specific to each color channel based on the dominant color characteristic of the display device. The system adjusts the margin voltage locally for the dominant color channel rather than applying a global margin voltage to all channels, optimizing power consumption while ensuring reliable black image display for the predominant color.
2Reliability
If margin voltage is uniformly applied to all colors, then black image display stability is improved, but power consumption increases
Solution Approach 1:
The patent extracts the margin voltage requirement from the universal application to a selective application based on dominant color. By identifying the dominant color channel, the system extracts only the necessary margin voltage application to that specific channel, removing the unnecessary power consumption associated with applying margin voltage to non-dominant color channels.
3Use of energy by moving object
If individual margin voltages are set for each color based on dominant color, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the display device to automatically determine its own dominant color and automatically configure the appropriate margin voltage settings. The system performs self-diagnosis through test image display and color coordinate analysis, then self-adjusts the margin voltage parameters without requiring external manual configuration, thereby reducing power consumption while managing complexity through automation.
Solution Approach 2:
The patent employs feedback mechanisms where the system displays test images, measures color coordinates, determines the dominant color, and uses this information to adjust margin voltage settings. This closed-loop feedback process automates the complex margin voltage configuration, reducing power consumption while managing device complexity through intelligent control algorithms.
Data Source
AI summary
The display device includes a display unit including pixels displaying first to third colors, a data driver that supplies a plurality of test voltages to the pixels in the display unit through data lines to display test images through the display unit, and a margin voltage setting unit that determines a dominant color based on test images displayed on the display unit and individually sets margin voltages corresponding to the first to third colors based on the dominant color.