Irregular Gate Balances Light Uniformity in AMOLED Cutouts
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Solution Overview
Problem
Active-matrix organic light-emitting diode (AMOLED) display panels face issues with uneven light emission uniformity due to load differences between irregularly-shaped regions and normal display areas, affecting the brightness of pixels in areas like U-shaped or O-shaped cutouts for receivers or cameras.
Innovation Solution
A display device with irregularly-shaped display pixels, each equipped with an irregularly-shaped gate below a driving thin-film transistor, which adjusts light-emitting brightness using voltage signals to balance light-emitting uniformity across irregularly-shaped and pixel display areas, with the gates connected through a lead and positioned between buffer and gate insulating layers, using materials like metal, metal oxide, or graphene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If irregular regions are cut out to increase screen ratio and area, then the display area is increased, but light emission uniformity becomes uneven due to load difference
Solution Approach 1:
The patent applies local quality by introducing an irregularly-shaped gate specifically in the irregular display region to compensate for the load difference caused by the cutout. This localized structural modification adjusts the threshold voltage of driving transistors in the irregular region, thereby balancing the light emission uniformity across the entire display area while maintaining the increased screen ratio.
2Illumination intensity
If irregularly-shaped gate is introduced to balance light emission uniformity, then light emission uniformity is improved, but device structure becomes more complex
Solution Approach 1:
The patent merges the irregularly-shaped gate with the existing driving transistor structure, integrating the compensation function directly into the transistor gate rather than adding a separate component. This integration approach achieves light emission uniformity improvement while minimizing increases in device complexity.
Data Source
AI summary
A display device, including an irregularly-shaped display area disposed with a plurality of irregularly-shaped display pixels and at least one attachment device; and a pixel display area disposed adjacent to the irregularly-shaped display area; wherein each of the irregularly-shaped display pixels comprises an irregularly-shaped gate disposed below a driving thin-film transistor, and the irregularly-shaped gate changes a light-emitting brightness of the irregularly-shaped display pixel according to an adjustment voltage signal to balance light-emission uniformity of the irregularly-shaped display area and the pixel display area.