Dual-Drive Pixel Circuit for Uniform Under-Screen Camera Displays
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Solution Overview
Problem
The low pixel density region in display panels with under-screen cameras has lower luminous brightness due to lower pixel density, affecting display quality and uniformity.
Innovation Solution
A pixel circuit with two driving circuits and light-emitting control circuits to control the light-emitting element, allowing both circuits to drive the element simultaneously, increasing driving current and brightness in the low pixel density region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pixel density is reduced in the camera region to enable under-screen camera placement, then the camera imaging requirements are met, but the display brightness in that region decreases
Solution Approach 1:
The pixel circuit is divided into two independent driving circuits (first driving circuit and second driving circuit), each capable of driving the light-emitting element separately. This segmentation allows the low PPI region to receive sufficient driving current for camera functionality while maintaining adequate display brightness through coordinated operation of both circuits
Solution Approach 2:
Two driving circuits are merged to simultaneously drive a single light-emitting element in the low PPI region. The first and second driving circuits work together to provide combined driving current, ensuring that the display brightness in the camera region meets requirements while accommodating the under-screen camera placement
2Adaptability or versatility
If the pixel density is reduced in the low PPI region, then the camera can be placed underneath, but the display uniformity deteriorates due to brightness difference between regions
Solution Approach 1:
Different driving strategies are applied to different regions: the low PPI region uses dual driving circuits with independent control to optimize for camera transparency, while maintaining sufficient brightness through coordinated operation. The high PPI region uses conventional single driving circuit operation. This local quality differentiation resolves the uniformity issue while supporting under-screen camera placement
Data Source
AI summary
A pixel circuit, a display substrate, a display panel, and a display device are provided. The pixel circuit includes: a first driving circuit, a second driving circuit, a first light-emitting control circuit, and a second light-emitting control circuit. The first light-emitting control circuit is configured to control a connection between the first driving circuit and the light-emitting element and a connection between the first driving circuit and the first power line to be turned on or off; the second light-emitting control circuit is configured to control a connection between the second driving circuit and the light-emitting element and a connection between the second driving circuit and the second power line to be turned on or off; the first driving circuit and the second driving circuit are configured to control a driving current for driving the light-emitting element to emit light based on the same data voltage.