Display Panel Light-Shielding Layers for Under-Screen Camera Laser Processing
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Solution Overview
Problem
The manufacturing efficiency of display devices with under-screen cameras is hindered by the need for small-area lasers to remove light-emitting structure layers, which affects pixel structures and increases production costs.
Innovation Solution
A display panel design featuring a first light-shielding layer that covers the light-emitting structure layer and pixel driving circuit in non-transmissive areas, allowing for the use of large-area lasers to remove these layers without impacting the pixel structures, and a second light-shielding layer to manage heat and prevent halo formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If small-area laser is used to remove light-emitting structure layers, then pixel structures are protected from laser damage, but manufacturing efficiency decreases
Solution Approach 1:
The patent divides the laser processing system into two distinct components: a first laser for precise, small-area removal of light-emitting structure layers in display areas, and a second laser for efficient, large-area removal of organic matter in non-display areas. This segmentation allows each laser to be optimized for its specific function, protecting pixel structures while maintaining high manufacturing efficiency through parallel processing of different regions
Solution Approach 2:
The patent applies different laser processing parameters and types to different spatial regions: display areas receive controlled small-area laser treatment with specific power and duration to protect underlying pixel structures, while non-display areas receive aggressive large-area laser treatment for rapid material removal. This local quality approach ensures pixel protection where needed while maximizing efficiency where permissible
2Productivity
If large-area laser is used to remove light-emitting structure layers, then manufacturing efficiency increases, but pixel structures are damaged by laser
Solution Approach 1:
The patent segments the laser processing task by spatial location and material type, directing large-area laser treatment exclusively to non-display areas where organic matter needs removal, while using controlled small-area laser treatment for display areas containing pixel structures. This segmentation enables high-efficiency processing without compromising pixel integrity
Solution Approach 2:
The patent introduces a protective mechanism where the first light-emitting structure layer acts as an intermediary that absorbs and confines the laser effect in non-display areas, preventing the laser from reaching and damaging underlying pixel structures in display areas. This intermediary approach allows aggressive laser treatment where safe while protecting sensitive regions
3Adaptability or versatility
If laser is used to increase transmittance in under-screen camera areas, then camera functionality is improved, but light-emitting structure layers must be removed which complicates the process
Solution Approach 1:
The patent segments the laser processing into two sequential operations: first removing light-emitting structure layers in display areas to enable under-screen camera functionality, then removing organic matter in non-display areas. This segmentation transforms a complex single-step process into two simpler, optimized steps that can be independently controlled and monitored
Solution Approach 2:
The patent performs preliminary removal of light-emitting structure layers in display areas before final organic matter removal in non-display areas. This preliminary action creates the necessary optical pathways for under-screen cameras while establishing a foundation for the subsequent efficient cleanup process, reducing overall process complexity through staged execution
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances manufacturing efficiency by enabling the use of large-area lasers for removing light-emitting structure layers while protecting sensitive areas, improving light transmittance and reducing production costs.
Implementation Method 1
a first light-shielding layer that covers the light-emitting structure layer and pixel driving circuit in non-transmissive areas, allowing for the use of large-area lasers to remove these layers without impacting the pixel structures
Implementation Method 2
a second light-shielding layer to manage heat and prevent halo formation
Implementation Method 3
laser is often used to remove light-emitting structure layers, such as red light-emitting structure layers, green light-emitting structure layers, blue light-emitting structure layers, etc., of pixels from some areas, to increase transmittance of a display area corresponding to the under-screen camera
Data Source
AI summary
The present disclosure provides a display panel, including a substrate, a pixel driving circuit, a planarization layer, and a display area. The planarization layer is arranged on a side of the pixel driving circuit away from the substrate. The planarization layer includes a first area and a second area. The first area and the second area are in a direction perpendicular to the substrate. A vertical distance from a surface of the first area away from the substrate to the substrate is greater than a vertical distance from a surface of the second area away from the substrate to the substrate. The display area includes a second light-shielding layer arranged between the substrate and the planarization layer. In the direction perpendicular to the substrate, a projection of the second light-shielding layer partially overlaps with a projection of the first area.