Under-screen Camera Display Panel Transistor Routing
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Solution Overview
Problem
Current organic light-emitting diode (OLED) display panels have low transmittance and suffer from slit diffraction due to opaque metal lines, which affects the image quality of under-screen cameras.
Innovation Solution
The display panel design includes a display area with transistor units and first light-emitting pixel units, and an under-screen camera area with second light-emitting pixel units, where the transistor units are connected to the second light-emitting pixel units via conductive wires using 7T1C pixel circuits, reducing the density of pixel units in the camera area and minimizing the impact of diffracted light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If drive transistors with multi-layered metal lines are disposed directly below light-emitting pixel units, then the display panel can achieve compact structure and efficient driving, but the opaque metal lines cause low transmittance and slit diffraction in the under-screen camera area
Solution Approach 1:
The patent divides the transistor units into two groups: those in the display area with complete multi-layered structures, and those in the under-screen camera area with simplified structures that remove or reduce opaque metal lines. This segmentation allows different regions to have optimized structures for their specific functions, resolving the contradiction between compact structure and light transmittance.
Solution Approach 2:
The patent applies different structural qualities to different regions: the display area uses dense multi-layered metal lines for efficient driving, while the under-screen camera area uses reduced or transparent metal line structures to maximize light transmittance. This local differentiation resolves the contradiction by optimizing each region for its primary function.
2Reliability
If drive transistors with multi-layered metal lines are disposed directly below light-emitting pixel units, then the display panel can achieve efficient electrical connection, but slit diffraction occurs between fine metal lines resulting in stray light that affects under-screen camera image quality
Solution Approach 1:
The patent extracts or removes the problematic fine metal lines from the under-screen camera area while maintaining the essential electrical connection functionality through alternative routing or simplified structures. This extraction eliminates the source of slit diffraction while preserving the necessary electrical connections for driving the light-emitting pixel units.
3Area of stationary object
If the density of light-emitting pixel units in the under-screen camera area is high, then the display area can be maximized, but the transmittance in the camera area remains low and diffracted light from metal slits increases
Solution Approach 1:
The patent dynamically adjusts the density of light-emitting pixel units based on spatial location: higher density in the display area for maximum display coverage, and lower density in the under-screen camera area to maximize light transmittance. This dynamic density adjustment resolves the contradiction by allowing both display area maximization and camera performance optimization.
Data Source
AI summary
A display panel and a display device are provided. A display area of the display panel is provided with a plurality of transistor units and first light-emitting pixel units driven by the transistor units; and an under-screen camera area of the display panel is only provided with a plurality of second light-emitting pixel units, the transistor units are disposed surrounding the under-screen camera area, and each of the transistor units disposed surrounding the under-screen camera area in the display area is electrically connected to a plurality of the second light-emitting pixel units by each of conductive wires.