Display Panel Circuit Layout to Prevent Under-Screen Camera Dark Spots
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Solution Overview
Problem
Existing display technologies face challenges in integrating under-screen cameras without compromising the screen-to-body ratio and light transmittance, particularly in active-matrix organic light-emitting diode (AMOLED) displays, due to structural limitations and potential display defects like dark spots during conductive line formation.
Innovation Solution
The display panel design includes separate regions for pixel circuits and light-emitting elements, with conductive lines connecting them externally, and optimized via hole arrangements to minimize structural overlap and interference, using transparent conductive materials and multiple conductive layers to enhance light transmittance and reduce display defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If pixel circuits and light-emitting elements are integrated in the same region, then device complexity is reduced, but light transmittance deteriorates due to structural overlap
Solution Approach 1:
The display panel is divided into distinct first display region and second display region. The first pixel circuits are located in the first display region, while the second pixel circuits are located in the second display region. This spatial segmentation allows light to pass through the second display region without obstruction from pixel circuits, thereby improving light transmittance while maintaining device functionality.
Solution Approach 2:
The patent utilizes spatial dimensionality by creating separate regions at the same display plane. The second display region is positioned such that its orthographic projection does not overlap with the first pixel circuits, effectively using spatial separation in the same dimensional plane to resolve the conflict between integration and light transmittance.
2Area of stationary object
If under-screen camera is integrated, then screen-to-body ratio is improved, but display quality deteriorates due to potential dark spots and structural interference
Solution Approach 1:
The patent applies different structural configurations to different regions. The second display region has optimized characteristics for camera integration with enhanced light transmittance properties, while the first display region maintains standard pixel circuit structure. This local differentiation allows the under-screen camera to be integrated without compromising overall display quality.
Solution Approach 2:
The conductive lines are strategically routed to connect second pixel circuits to light-emitting elements without passing through the under-screen camera region. This intermediary routing approach prevents interference between the camera structure and the conductive pathways, eliminating potential dark spots while maintaining screen-to-body ratio.
3Measurement precision
If pixel density is increased, then display resolution is improved, but manufacturing precision requirements worsen due to tighter spacing
Solution Approach 1:
By segmenting the display into two distinct regions, the patent creates more manufacturing tolerance in the second display region where via holes connect pixel circuits to light-emitting elements. The relaxed spatial constraints in the second region allow for easier via hole positioning and alignment, reducing manufacturing precision requirements while maintaining high display resolution.
Data Source
AI summary
A display panel and a display device are provided. In the display panel, the first initialization signal line and the second initialization signal line are located in a same layer, and are located in a different layer from the first reset control signal line, an orthographic projection of the first reset control signal line on the base substrate is located between an orthographic projection of the first initialization signal line on the base substrate and an orthographic projection of the second initialization signal line on the base substrate, the gate electrode of the driving transistor is connected to a second electrode of the first reset transistor through the fourth connection electrode, the shield electrode and the first power supply line are of an integral structure, an orthographic projection of the shield electrode on the base substrate covers an orthographic projection of the fourth connection electrode on the base substrate.