Display Device Clock Signal Synchronization for Brightness Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in achieving uniform brightness across different pixel areas due to varying loads and lengths of scan lines, leading to brightness differences between pixels.
Innovation Solution
The implementation of a display device design where clock signals for different scan drivers have distinct characteristics, such as pulse width, rising edge period, and falling edge period, and the use of separate clock lines for each scan driver to adjust data entry times and reduce brightness differences between pixel areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If scan lines have different lengths in different pixel areas, then the display device can cover larger display areas, but brightness uniformity deteriorates due to varying loads on driving wires
Solution Approach 1:
The patent applies local quality by providing different clock signal characteristics to different scan drivers based on their specific requirements. Each pixel area receives customized clock signals (different pulse widths, rising/falling edge periods) matched to its scan line load characteristics, enabling uniform brightness across areas with different display sizes and scan line lengths
Solution Approach 2:
The patent changes clock signal parameters (pulse width, rising edge period, falling edge period) to compensate for varying scan line loads. By adjusting these temporal parameters, the patent equalizes the data entry timing across different pixel areas, resolving the brightness uniformity issue while maintaining large display area coverage
2Adaptability or versatility
If different pixel areas have different scan line lengths, then display flexibility increases, but brightness differences occur between pixel areas due to varying data entry times
Solution Approach 1:
The patent implements local quality by customizing clock signal characteristics for each pixel area according to its specific scan line length and load requirements. This localized approach allows the display to maintain flexibility in layout design while ensuring each area achieves uniform brightness through tailored timing parameters
Solution Approach 2:
The patent applies dynamics by making clock signal parameters adjustable and adaptable to different pixel area requirements. The system dynamically adjusts pulse widths and edge periods based on the specific configuration of each pixel area, enabling the display to maintain both flexibility and brightness consistency across varying layouts
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
The present invention 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.