Sub-pixel Control Circuit for Display Color Shift and Power
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Solution Overview
Problem
Existing self-luminous electronic devices face issues with color shift during low gray-scale display and high power consumption during high gray-scale display due to the use of a unified duty ratio for sub-pixel circuits of different colors, which complicates design and increases power usage.
Innovation Solution
The electronic device employs separate control signal lines for each sub-pixel circuit to independently control their light-emitting times, allowing for flexible adjustment of duty ratios based on the characteristics of each color's light emitting elements, thereby alleviating color shift and power consumption issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a unified duty ratio is used for sub-pixel circuits of different colors, then the control structure is simple, but color shift occurs during low gray-scale display
Solution Approach 1:
The patent divides the unified control structure into separate control paths for different color sub-pixel circuits. Specifically, it provides different control signals (first control signal, second control signal, third control signal) to red, green, and blue sub-pixel circuits respectively, allowing independent duty ratio adjustment for each color to eliminate color shift while maintaining display accuracy.
Solution Approach 2:
The patent applies different control parameters (duty ratios) to different local components (sub-pixel circuits of different colors) based on their specific characteristics. By adjusting the duty ratio of each color channel independently according to its light emission characteristics, the patent achieves accurate color display without color shift.
2Device complexity
If a unified duty ratio is used for sub-pixel circuits of different colors, then the control structure is simple, but power consumption is excessively high during high gray-scale display
Solution Approach 1:
The patent segments the power control for different color sub-pixel circuits by providing independent control signals with different duty ratios. This allows each color channel to operate at its optimal power level, reducing overall power consumption during high gray-scale display while maintaining the necessary brightness levels.
Solution Approach 2:
The patent changes the duty ratio parameter for each color sub-pixel circuit independently based on its specific characteristics. By optimizing the duty ratio for each color channel, the patent achieves efficient power utilization that reduces excessive power consumption during high gray-scale operation.
3Manufacturing precision
If different operating voltages and channel width/length are designed for sub-pixel circuits of different colors, then power consumption and color shift are reduced, but design complexity increases significantly
Solution Approach 1:
The patent segments the control function by introducing separate control signal lines for different color sub-pixel circuits. This approach achieves independent duty ratio control for each color, reducing color shift and improving display accuracy, while avoiding the complex structural modifications (different voltages, channel dimensions) that would significantly increase design complexity.
Solution Approach 2:
The patent changes the control parameter (duty ratio) rather than the physical structure (voltage, channel width/length). By adjusting the temporal parameter (duty ratio) of the control signals, the patent achieves the same effect as structural modifications but with much lower design complexity and easier implementation.
Data Source
AI summary
An electronic device includes a pixel circuit, a data line and two control signal lines. The pixel circuit includes a first sub-pixel circuit and a second sub-pixel circuit, in which a light color of the first sub-pixel circuit is different from a light color of the second sub-pixel circuit. The data line is electrically connected with the first sub-pixel circuit and the second sub-pixel circuit. The two control signal lines are respectively a first control signal line and a second control signal line. The first control signal line is electrically connected with the first sub-pixel circuit for controlling a light-emitting time of the first sub-pixel circuit, and the second control signal line is electrically connected with the second sub-pixel circuit for controlling a light-emitting time of the second sub-pixel circuit.