Micro-LED Display Reset Line and Power Line Width Optimization
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Solution Overview
Problem
High-definition display devices using micro-LEDs face challenges in increasing luminance due to limited space for arranging power lines and circuits, making it difficult to enhance luminance effectively.
Innovation Solution
The configuration includes a wider power line for the red sub-pixel and optimized channel ratios for drive transistors, along with a shared reset line that extends between video and power lines, allowing for increased current supply to the red sub-pixel while maintaining high definition and reducing the overall size of the pixel structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the width of the power line is increased to increase luminance, then the luminance of the display device is improved, but the pixel size increases and space for arranging lines and circuits is reduced
Solution Approach 1:
The patent applies local quality by differentiating the width of power lines based on the specific requirements of each sub-pixel. The first power line (for the red sub-pixel) has a larger width to supply higher current and achieve higher luminance, while the second power line (for the green sub-pixel) has a smaller width. This localized differentiation allows each sub-pixel to have optimized power supply without uniformly increasing the overall pixel size.
2Illumination intensity
If the width of the power line is increased to increase luminance, then the luminance of the display device is improved, but the space for arranging lines and circuits in the display region is reduced
Solution Approach 1:
The patent implements local quality by assigning different widths to power lines serving different sub-pixels. The first power line has a larger width specifically for the red sub-pixel that requires higher luminance, while the second power line has a smaller width for the green sub-pixel. This approach concentrates the increased space requirement only where needed rather than uniformly across the entire display region.
Solution Approach 2:
The patent applies asymmetry by creating an asymmetric power line configuration where the first power line width is deliberately made larger than the second power line width. This asymmetric design matches the different luminance requirements of the red and green sub-pixels, allowing the red sub-pixel to achieve higher luminance while the overall layout remains space-efficient.
3Illumination intensity
If the pixel size is increased to accommodate wider power lines, then the luminance is improved, but the high definition capability is reduced
Solution Approach 1:
The patent applies local quality by selectively increasing the power line width only for the red sub-pixel's first power line, rather than uniformly increasing all power line widths or the entire pixel size. This localized approach allows the red sub-pixel to achieve higher luminance while keeping the overall pixel dimensions and other sub-pixels optimized for high definition display.
Data Source
AI summary
According to one embodiment a display device includes first and second sub-pixels, first and second power lines, and a reset line. The first sub-pixel includes a first light emitting element and a first pixel circuit. The second sub-pixel includes a second light emitting element and a second pixel circuit. The first power line supplies power to the first pixel circuit. The second power line supplies power to the second pixel circuit. Reset signal is supplied to the reset line. The reset line and the power lines are arranged in a display region. The reset line is connected to both the pixel circuits. A width of the first power line is larger than a width of the second power line.