OLED Display Panel Brightness Uniformity via TFT Channel Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional OLED displays experience significant brightness differences between bending regions and flat regions after edge bending, leading to a poor user experience due to inconsistent display brightness and potential color shifts.
Innovation Solution
The design involves thin film transistors with specific channel width to channel length ratios in both flat and bending display parts, where the bending region's ratios are adjusted to match or exceed those of the flat region, ensuring consistent brightness and reducing color deviations by integrating the bending and flat display parts as an integrated structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If edges of OLED display are bent to reduce bezel dimensions, then screen-to-body ratio is improved, but display brightness in bending regions becomes significantly lower than in flat regions
Solution Approach 1:
The patent applies different channel width-to-channel length ratios for thin film transistors in different regions of the display panel. Specifically, the ratio in bending regions is designed to be greater than the ratio in flat regions, creating local structural differences that compensate for the brightness reduction caused by bending. This local quality adjustment ensures uniform display brightness across the entire screen while maintaining the edge-bending design for high screen-to-body ratio.
2Adaptability or versatility
If bending regions have wider viewing angles, then viewing angle is improved, but display brightness consistency between bending and flat regions deteriorates
Solution Approach 1:
The patent implements region-specific thin film transistor designs where the channel width-to-channel length ratio is optimized for each region's characteristics. Bending regions use a greater ratio to compensate for their wider viewing angles and prevent brightness loss, while flat regions use a smaller ratio. This local optimization maintains brightness consistency across regions with different viewing angle characteristics.
Data Source
AI summary
A display panel, a display method thereof, and a display equipment are provided. The display panel includes a flat display part and a bending display part. A first thin film transistor is in the flat display part, and a second thin film transistor is in the bending display part. A ratio of a channel width to a channel length of an active layer of the first thin film transistor is greater than a ratio of a channel width to a channel length of an active layer of the second thin film transistor of the second thin film transistor. The display method includes a step of making a luminescence intensity of the bending display part greater than a luminescence intensity of the flat display part. The display equipment includes the display panel mentioned above.