Display Panel Trace Layout for Camera Light Transmittance
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Solution Overview
Problem
Existing display panels face challenges in achieving high screen-to-body ratios and integrating in-screen cameras without compromising imaging quality due to light transmittance and interference issues from slits between signal traces in the camera region.
Innovation Solution
A display panel design with high pixel density in the display region and low pixel density in the camera region, combined with a touch function layer that blocks slits to improve light transmittance and reduce interference, utilizing a multi-layer pixel driving circuit structure and specific trace configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera region uses normal display structure with signal traces, then the display function is achieved, but light interference and diffraction occur affecting imaging quality
Solution Approach 1:
The harmful slits between signal traces are selectively removed or filled in the camera region. The pixel driving circuit traces in the camera region are configured to eliminate gaps, extracting the harmful light interference elements while preserving the necessary electrical connection functions for display operation.
Solution Approach 2:
The pixel driving circuit trace structure is made non-uniform: in the camera region, traces are densely packed or filled to eliminate slits for optimal imaging, while in the display region, normal trace spacing is maintained for display functionality. This local differentiation resolves the contradiction between display and imaging requirements.
2Area of stationary object
If the screen-to-body ratio is increased with in-screen camera, then the display area is maximized, but light transmittance in camera region is reduced
Solution Approach 1:
The display panel is segmented into distinct functional regions: the camera region with optimized trace structures for high light transmittance and the display region with normal structures. This segmentation allows each region to be optimized independently, achieving both high screen-to-body ratio and sufficient light transmittance for imaging.
Solution Approach 2:
The physical parameters of the pixel driving circuit traces are changed in the camera region - trace width, spacing, or filling ratio are adjusted to maximize light transmission. These parameter modifications enable the in-screen camera to receive sufficient light while maintaining the high screen-to-body ratio design.
3Manufacturing precision
If pixel density is increased in display region, then display quality is improved, but manufacturing complexity increases
Solution Approach 1:
The pixel driving circuit layer serves multiple functions: it drives the display pixels in the display region and simultaneously provides the trace structure for the in-screen camera region. By making this layer multi-functional and region-adaptive, the patent achieves high display quality without proportionally increasing overall manufacturing complexity.
Data Source
AI summary
A display panel includes: a base substrate, a pixel driving circuit layer in a second display region of the base substrate, a plurality of light emitting elements and a touch function layer at least in the second display region. A pixel driving circuit trace of the pixel driving circuit layer includes a plurality of first traces extending in a first direction and a plurality of second traces extending in a second direction intersecting the first direction. A first slit is between two adjacent first traces and a second slit is between two adjacent second traces. At least one of an orthographic projection of the first slit on the base substrate and an orthographic projection of the second slit on the base substrate at least partially overlaps with an orthographic projection of the touch function layer on the base substrate.