Display Device Clock Signal Segmentation for Brightness Uniformity
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Solution Overview
Problem
Display devices face challenges in achieving uniform brightness across different pixel areas due to varying loads on driving wires, leading to differences in brightness between pixel areas.
Innovation Solution
A display device configuration with multiple pixel areas, each connected to separate scan lines and clock signals with distinct signal characteristics, such as pulse width, rising and falling edge periods, and waveforms, to synchronize data entry times and reduce brightness differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single clock signal is supplied to all pixel areas, then the device complexity is reduced, but brightness uniformity deteriorates due to varying loads on driving wires
Solution Approach 1:
The display device divides the pixel areas into multiple groups, with each group receiving a separate clock signal. This segmentation allows independent optimization of clock signal characteristics for different regions, compensating for varying wire loads and achieving uniform brightness across the display.
Solution Approach 2:
Different clock signal characteristics (pulse width, rising/falling edge periods) are applied to different pixel areas based on their specific load conditions. This local quality approach ensures that each region receives the appropriate signal parameters to achieve uniform brightness despite varying wire lengths and loads.
2Illumination intensity
If different clock signal characteristics are supplied to different pixel areas, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The pixel areas are segmented into multiple groups, each with dedicated clock signal lines and control logic. This segmentation enables independent optimization of signal characteristics for each group while maintaining manageable system complexity through modular organization.
Solution Approach 2:
The system adjusts clock signal parameters (pulse width, rising/falling edge periods) based on the specific load conditions of different pixel areas. This parameter change approach allows brightness uniformity to be achieved through signal optimization rather than complex hardware modifications.
3Adaptability or versatility
If pixel areas have different widths, then adaptability to different display requirements is improved, but brightness uniformity deteriorates due to varying scan line loads
Solution Approach 1:
The display is segmented into multiple pixel areas with different widths, each assigned to separate scan drivers with independently optimized clock signals. This segmentation allows the system to accommodate varied display requirements while maintaining brightness uniformity through localized signal optimization.
Solution Approach 2:
Each pixel area with different width characteristics receives locally optimized clock signal parameters and scan line configurations. This local quality approach ensures that brightness uniformity is maintained despite the varying physical dimensions and load conditions of different display regions.
Data Source
AI summary
The present disclosure relates to a display device including first pixels disposed in a first pixel area, and connected to first scan lines; second pixels disposed in a second pixel area, and connected to second scan lines; a timing controller configured to supply a first clock signal and a second clock signal to a first clock line and a second clock line, respectively; a first scan driver configured to receive the first clock signal through the first clock line, and to supply a first scan signal to the first scan lines; and a second scan driver configured to receive the second clock signal through the second clock line, and to supply a second scan signal to the second scan lines, wherein the second pixel area has a smaller width than the first pixel area.