Pixel Circuit Layout Using Color-Specific Transistor Ratios
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Solution Overview
Problem
The challenge of optimizing the layout design of pixel circuits in high-resolution display panels, such as Micro LED or Organic LED displays, is not adequately addressed by existing technologies, particularly in terms of balancing driving capability and layout area.
Innovation Solution
The implementation of pixel circuits with transistors of varying width-to-length ratios to drive light-emitting elements of different colors, allowing for optimized layout design by accommodating elements with varying driving capabilities and reducing the layout area required for those with lower demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If transistors with the same width-to-length ratio are used in all pixel circuits, then the driving capability is standardized and easy to manufacture, but the layout area cannot be optimized for different light-emitting elements with varying driving requirements
Solution Approach 1:
The patent applies local quality by differentiating the width-to-length ratios of transistors in different pixel circuits based on the specific driving requirements of each light-emitting element. Instead of using a uniform transistor design across all pixel circuits, the invention tailors the transistor dimensions locally to match the driving capability needs of red, green, and blue light-emitting elements, thereby optimizing layout area while maintaining manufacturability.
2Power
If the width-to-length ratio of transistors is increased to enhance driving capability, then the driving capability is improved, but the layout area occupied by the pixel circuit increases
Solution Approach 1:
The patent applies parameter changes by systematically varying the width-to-length ratio parameter of transistors across different pixel circuits. Specifically, red light-emitting elements are paired with transistors having a first width-to-length ratio, green light-emitting elements with transistors having a second width-to-length ratio, and blue light-emitting elements with transistors having a third width-to-length ratio. This parameter differentiation enables precise control of driving capability while minimizing layout area for each color channel.
Data Source
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AI summary
The present application discloses a display panel and a display apparatus. The display panel includes a plurality of light-emitting elements and a plurality of pixel circuits. At least one of the light-emitting elements includes a first light-emitting element and a second light-emitting element in different light-emitting colors and the light-emitting elements include a first pixel circuit configured to drive the first light-emitting element and including a first target transistor, and a second pixel circuit configured to drive the second light-emitting element and including a second target transistor with a same function as that of the first target transistor and a different width-to-length ratio from that of the first target transistor. According to the embodiments of the present application, the layout design of the pixel circuit can be optimized while the driving capability is considered.