OLED Display Panel Segmented Reference Voltage Lines
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Solution Overview
Problem
Current OLED display panels face the issue of sub-pixel undesired display, where light leakage occurs between sub-pixels of different colors, affecting display quality and increasing power consumption.
Innovation Solution
The display panel incorporates a plurality of sub-pixels of different colors, each with a pixel circuit and a light-emitting element electrically connected. The panel includes separate reference voltage signal lines for each color sub-pixel, with different voltage values to prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single common reference voltage signal line is used for all sub-pixels, then device complexity is reduced, but sub-pixel undesired display (light leakage) occurs affecting display quality
Solution Approach 1:
The common reference voltage signal line is segmented into multiple separate reference voltage signal lines, each corresponding to a specific color sub-pixel (red, green, blue). This segmentation allows independent voltage control for each sub-pixel type, preventing light leakage in non-active sub-pixels while maintaining acceptable device complexity through systematic wiring organization.
Solution Approach 2:
Different reference voltage values are applied to different color sub-pixels based on their specific characteristics. The anode of each sub-pixel receives a reference voltage tailored to its color type, creating local quality differences that prevent undesired light emission while optimizing display quality for each sub-pixel region.
2Reliability
If higher carrier mobility materials are used in the common film layer, then conductivity is improved, but power consumption increases due to sub-pixel light leakage
Solution Approach 1:
The patent applies different reference voltage values to different color sub-pixels to create local quality differences. This allows the common film layer to use higher carrier mobility materials for improved conductivity, while the localized voltage control prevents excessive current flow to non-active sub-pixels, thereby preventing light leakage and controlling power consumption.
Solution Approach 2:
The patent changes the reference voltage parameter for each color sub-pixel (red, green, blue have different reference voltages). This parameter differentiation allows optimal voltage control for each sub-pixel type, enabling the use of high-conductivity materials without causing power consumption increase from light leakage in inactive sub-pixels.
3Manufacturing precision
If different reference voltage values are applied to different color sub-pixels, then sub-pixel light leakage is prevented, but device complexity increases
Solution Approach 1:
The reference voltage signal lines are segmented by color sub-pixel type (red, green, blue), with each segment carrying a specific reference voltage value. This segmentation achieves precise control for preventing light leakage while organizing the wiring in a systematic manner that limits complexity growth through regular patterns and modular structure.
4Manufacturing precision
If separate reference voltage signal lines are used for each color sub-pixel, then display quality is improved by preventing light leakage, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented to accommodate separate reference voltage signal lines for each color sub-pixel. The segmentation is implemented in a systematic way that, while increasing precision, maintains manufacturability through organized wiring patterns and standardized fabrication steps for each color channel.
Solution Approach 2:
The patent implements local quality differentiation in the manufacturing process by applying specific reference voltage values to specific color sub-pixel regions. This localized approach improves display quality by preventing light leakage, while the manufacturing complexity is managed through region-specific processing that follows consistent patterns for each color type.
Data Source
AI summary
The present disclosure includes a display panel and a display apparatus. The display panel includes a plurality of sub-pixels of different colors. The sub-pixel includes a pixel circuit and a light-emitting element, and the plurality of sub-pixels of different colors at least includes a first color sub-pixel and a second color sub-pixel. The display panel at least includes a first reference voltage signal line and a second reference voltage signal line. The first reference voltage signal line is electrically connected to an anode of a light-emitting element in the first color sub-pixel; and the second reference voltage signal line is electrically connected to an anode of a light-emitting element in the second color sub-pixel. A voltage value of a reference signal transmitted on the first reference voltage signal line is different from a voltage value of a reference signal transmitted on the second reference voltage signal line.