Display Panel Shielding Layers for CUP Transmittance Etching
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Solution Overview
Problem
Existing display technologies face challenges in achieving high light transmittance in the camera under panel (CUP) area, where optical devices like cameras are integrated, leading to issues such as misetching and reduced light transmission due to the use of laser etching processes.
Innovation Solution
A display panel design with distinct areas of varying light transmittance, utilizing shielding layers to protect film layers from laser etching, including a first shielding layer overlapping with light-emitting elements in a high-transmittance area and a second shielding layer protecting circuit elements in a lower-transmittance area, while using linear lasers to etch the film layer in the high-transmittance area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If laser etching is used to increase light transmittance in the CUP area, then light transmittance is improved, but misetching of film layers occurs
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the laser etching process and the film layers. This shielding layer selectively blocks laser exposure in specific areas (non-CUP regions) while allowing etching in the CUP area, thereby preventing misetching while maintaining high light transmittance where needed
Solution Approach 2:
The display panel is segmented into distinct regions (CUP area and non-CUP area) with different light transmittance requirements. The shielding layer is correspondingly segmented to provide differential protection, enabling precise control over where laser etching occurs and where film layers are preserved
2Illumination intensity
If the entire film layer is etched to increase light transmittance, then light transmittance is improved, but structural integrity and protection of circuit elements is compromised
Solution Approach 1:
Different regions of the film layer are treated differently: the CUP area undergoes laser etching to achieve high light transmittance, while non-CUP areas retain their original film layer structure for structural integrity and circuit protection. This local differentiation resolves the contradiction between light transmittance and structural reliability
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
Enhances light transmittance in the high-transmittance area by preventing misetching and maintaining the integrity of film layers, while reducing interference with optical functional elements like cameras.
Implementation Method 1
at least part of the film layer in the first area is etched off by laser to increase the light transmittance of the first area
Implementation Method 2
shielding layers provided at a side of the light-emitting elements facing the substrate, and including a first shielding layer and a second shielding layer
Implementation Method 3
the first shielding layer overlapping with the light-emitting elements in the first area
Data Source
AI summary
Provided is a display panel and a manufacturing method thereof, and a display device. A first area and a second area of the display panel are adjacent to each other, and the light transmittance of the second area is smaller than that of the first area. The array layer of the display panel is provided at a side of the substrate and includes a plurality of circuit elements, a plurality of light-emitting elements are provided at a side, away from the substrate, of the array layer, and the shielding layer is provided at a side, facing the substrate, of the light-emitting elements and includes a first shielding layer and a second shielding layer. The first shielding layer overlaps with the light-emitting elements in the first area. The second shielding layer overlaps with the circuit elements and/or or the light-emitting elements in the second area.