AMOLED Pixel Electrode Layout for Higher Luminance
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Solution Overview
Problem
The existing AMOLED display panel technologies face challenges in enhancing the luminous performance of pixels due to inadequate pixel circuit structures, which affect the display effect and efficiency.
Innovation Solution
The proposed display panel incorporates a specific design for the pixel circuit and light-emitting element, featuring a base substrate with a sub-pixel including a pixel circuit and a light-emitting element connected via a first electrode, a first insulating layer, and a pixel definition layer, where the first electrode has a main body portion and a connecting portion, with the connecting portion's size optimized to reduce resistance and improve luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the pixel circuit structure is improved to enhance luminous performance, then the luminance and display effect are improved, but the device complexity increases
Solution Approach 1:
The first electrode is segmented into a main body portion and a connecting portion with different width dimensions. The connecting portion has a width of 1/5 to 4/5 of the main body portion width, creating a tapered structure that optimizes both electrical performance and optical output without requiring complex additional circuitry.
Solution Approach 2:
The width parameter of the first electrode is varied along its length, transitioning from a narrower connecting portion to a wider main body portion. This parameter change optimizes the balance between electrical resistance (narrower connection) and luminous area (wider body), improving luminous performance while maintaining circuit simplicity.
2Illumination intensity
If the connecting portion size is reduced to minimize signal loading, then the luminous performance is improved, but the electrical connection reliability may deteriorate
Solution Approach 1:
The connecting portion width is optimized to 1/5 to 4/5 of the main body portion width, creating an intermediate dimension that balances two competing requirements: it is narrow enough to minimize capacitive loading and maximize luminous efficiency, yet wide enough to maintain reliable electrical connection and current carrying capacity.
Solution Approach 2:
Different portions of the first electrode are given different width characteristics: the connecting portion has a narrower width optimized for electrical connection and minimal loading, while the main body portion has a wider width optimized for luminous output. This local differentiation of geometric properties optimizes both connection reliability and luminous performance simultaneously.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: a sub-pixel including a pixel circuit and a light-emitting element, the light-emitting element including a first electrode; a first insulating layer, the first electrode being connected with the pixel circuit through a first via hole penetrating the first insulating layer; a pixel definition layer including an opening; the first electrode includes a main body portion and a connecting portion, the main body portion is at least partially overlapped with the opening, the connecting portion is at least partially overlapped with the first via hole, a size of the connecting portion at the first via hole in a first direction is ⅕ to ⅘ of a size of the main body portion in the first direction.