Display Panel Touch Layer Transmittance for Under-Screen Camera
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Solution Overview
Problem
Current OLED display panels face challenges in achieving both touch functionality and light transmission due to the inhibitive effect of touch layers on photosensitive elements like under-screen cameras, making it difficult to realize a seamless camera experience.
Innovation Solution
A display panel design featuring a touch layer with openings in a functional add-on region, where the transmittance is higher than in the main display region, and the arrangement of touch lines formed by transparent conductive materials, allowing for improved light transmission and touch functionality without interfering with camera imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a touch layer is added to enable touch functionality, then the device gains touch capability, but light transmission is blocked affecting camera imaging
Solution Approach 1:
The touch layer is segmented into different regions: a first touch layer in the main display region with full touch functionality, and a second touch layer in the functional add-on region with reduced or no touch functionality. This segmentation allows different parts of the display to have different touch characteristics, enabling the camera region to have improved light transmission while other regions maintain full touch capability.
Solution Approach 2:
Different regions of the touch layer are given different properties: the first touch layer has complete touch electrode patterns for full touch functionality, while the second touch layer has reduced or modified electrode patterns to minimize light blocking. This local differentiation resolves the contradiction by providing touch functionality where needed while preserving light transmission in the camera region.
2Illumination intensity
If the touch layer transmittance is increased to improve light transmission, then camera imaging is improved, but touch functionality is reduced
Solution Approach 1:
The touch layer is divided into multiple sub-layers or regions with different transmittance characteristics. The second touch layer in the functional add-on region uses transparent conductor materials with higher transmittance, while the first touch layer in the main display region maintains standard transmittance for optimal touch functionality.
Solution Approach 2:
The transmittance parameter of the touch layer is changed locally in the functional add-on region by using transparent conductor materials with higher transparency or by reducing the density of conductive patterns. This parameter modification allows improved light transmission for camera imaging while maintaining adequate touch functionality through alternative detection methods or reduced-strength touch response.
3Illumination intensity
If transparent conductor material is used in the opening region, then light transmission is improved, but manufacturing complexity increases
Solution Approach 1:
The transparent conductor material used in the second touch layer is merged with the same material system used in the first touch layer and other conductive layers of the display. This material consolidation allows the different transmittance regions to be manufactured using the same deposition processes and material stacks, reducing manufacturing complexity despite the functional differentiation.
Data Source
AI summary
The present invention provides a display panel and a display device. The display panel includes a touch layer, a main display region, and a functional add-on region. A plurality of first pixels are arranged in the functional add-on region, and the touch layer is provided with an opening corresponding to the functional add-on region. A transmittance of the touch layer corresponding to the functional add-on region is greater than a transmittance of the touch layer corresponding to the main display region.