Display Substrate Electrode Segmentation for Micro-OLED Color Uniformity
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Solution Overview
Problem
Micro-OLED display devices exhibit color unevenness or color cast, particularly in near-eye applications like AR/VR, due to varying viewing angles causing differences in light mixing ratios and color coordinates, leading to suboptimal display effects.
Innovation Solution
The display substrate features independently arranged second electrode patterns connected to different common voltage terminals, allowing for controlled adjustment of common voltages to balance light proportions across different viewing angles, reducing color cast through equalization of color intensities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single common voltage terminal is used for all second electrode patterns, then the device structure is simple, but color unevenness and color cast occur due to different viewing angles across display areas
Solution Approach 1:
The common voltage terminal is segmented into multiple independent terminals, with each terminal controlling second electrode patterns in specific display areas. This segmentation allows different common voltages to be applied to different viewing angle zones, thereby compensating for color unevenness caused by angular variations without significantly increasing overall system complexity.
Solution Approach 2:
Different common voltages are applied to different spatial regions of the display device based on their specific viewing angle characteristics. The second electrode patterns in edge areas receive different voltage control compared to center areas, enabling localized color compensation and improving overall color uniformity across the display surface.
2Manufacturing precision
If multiple common voltage terminals are used to compensate for viewing angle differences, then color uniformity is improved, but device complexity increases
Solution Approach 1:
The display device is divided into multiple viewing angle zones (center area and edge areas), with each zone assigned to specific common voltage terminals. This segmentation strategy enables targeted voltage control for color compensation while minimizing the number of terminals needed, thus balancing color uniformity improvement with acceptable device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively minimizes color cast by optimizing common voltages for different viewing angles, enhancing display uniformity and improving overall display quality.
Implementation Method 1
a light-emitting layer and a second electrode layer which are laminated in sequence, the second electrode layer includes a plurality of second electrode patterns which are arranged independently and insulated from each other
Data Source
AI summary
A display substrate, a display device, and a method for driving a display device are provided. The display substrate includes a substrate, a drive circuit layer formed on the substrate, a light-emitting unit on a side of the drive circuit layer away from the substrate, and a light-transmitting layer on a side of the light-emitting unit away from the substrate; the light-emitting unit comprises a first electrode layer, a light-emitting layer and a second electrode layer which are laminated in sequence, the second electrode layer comprises a plurality of second electrode patterns which are arranged independently and insulated from each other, and at least part of the second electrode patterns are connected to different common voltage terminals. According to the embodiments of the present disclosure, the proportion of light of different colors in the light-emitting units located at different positions is controlled, which helps to improve the display effect.