Pixel Driving Transistor Layout for Color Uniformity in Displays
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Solution Overview
Problem
Driving transistors in drive circuits of pixel units emitting different colors with the same width-to-length ratio lead to poor display uniformity and short lifespan due to efficiency differences in light-emitting layers.
Innovation Solution
The use of driving transistors with channels of varying shapes and width-to-length ratios in pixel units emitting different colors to compensate for efficiency differences, improving display uniformity and lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If driving transistors with the same width-to-length ratio are used for pixel units emitting different colors, then device complexity is reduced and manufacturing is simplified, but display uniformity deteriorates and lifespan is shortened due to efficiency differences in light-emitting layers
Solution Approach 1:
The patent applies local quality by adjusting the width-to-length ratio of the channel according to the specific color requirements of each pixel unit. Different color pixel units (e.g., red, green, blue) have different light-emitting efficiency characteristics, and the channel dimensions are locally optimized for each color type to achieve balanced display performance while maintaining differentiated characteristics for each color channel
2Device complexity
If driving transistors with the same width-to-length ratio are used for pixel units emitting different colors, then device complexity is reduced, but lifespan deteriorates due to efficiency differences in light-emitting layers
Solution Approach 1:
The patent applies parameter changes by modifying the width-to-length ratio parameter of the transistor channel based on the specific color requirements of each pixel unit. Different color pixel units have different light-emitting efficiency characteristics, and the channel dimensions are adjusted as parameters to optimize performance and extend display device lifespan while maintaining differentiated characteristics for each color channel
3Reliability
If driving transistors with different width-to-length ratios are used for pixel units emitting different colors, then display uniformity is improved and lifespan is extended, but device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The patent implements local quality optimization by adjusting the width-to-length ratio of the channel according to the specific color requirements of each pixel unit. Different color pixel units (e.g., red, green, blue) have different light-emitting efficiency characteristics, and the channel dimensions are locally optimized for each color type to achieve balanced display performance and extended lifespan
4Duration of action of stationary object
If driving transistors with different width-to-length ratios are used for pixel units emitting different colors, then display device lifespan is extended, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the width-to-length ratio parameter of the transistor channel based on the specific color requirements of each pixel unit. Different color pixel units have different light-emitting efficiency characteristics, and the channel dimensions are adjusted as parameters to optimize performance and extend display device lifespan
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a plurality of pixel units, each pixel unit includes a pixel circuit and a light-emitting element, the pixel circuit is configured to drive the light-emitting element, the pixel circuit includes a driving transistor, the plurality of pixel units include a first pixel unit and a second pixel unit, the first pixel unit is configured to emit light of a first color, the second pixel unit is configured to emit light of a second color, the driving transistor of the pixel circuit of the first pixel unit includes a first channel, and the driving transistor of the pixel circuit of the second pixel unit includes a second channel, a width-to-length ratio of the first channel is greater than that of the second channel, and a shape of the first channel is different from that of the second channel.