OLED Display Panel Compensation Layer for Under-Screen Camera Diffraction
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Solution Overview
Problem
The existing display panels with conductive layers having grooves cause diffraction issues when light passes through, affecting the imaging quality of under-screen cameras in full-screen mobile devices.
Innovation Solution
Incorporating a compensation layer with second grooves that overlap with the projection of the first grooves on the substrate, either made of the same material as the conductive layer or with separate layers for amplitude and phase compensation, to reduce phase and amplitude differences in light passing through the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grooves are formed in the conductive layer to enable OLED light emission, then the display function is improved, but light diffraction occurs affecting under-screen camera imaging quality
Solution Approach 1:
The patent converts the harmful diffraction effect into a beneficial one by introducing a compensation layer with grooves that create opposite phase differences. The compensation layer's grooves are designed to produce phase shifts that cancel out the diffraction caused by the conductive layer's grooves, thereby eliminating the harmful effect while preserving the display function.
Solution Approach 2:
The compensation layer acts as an intermediary element between the conductive layer and the OLED layer. It mediates the optical path by introducing controlled phase differences that counterbalance the diffraction effects, allowing light to pass through with reduced diffraction while maintaining the electrical conductivity function.
2Object-affected harmful factors
If the compensation layer projection overlaps with the first grooves projection, then diffraction is reduced, but the structural complexity increases
Solution Approach 1:
The compensation layer is not uniformly structured but has localized grooves positioned specifically where they are needed - overlapping with the projection of the conductive layer's grooves. This local quality approach allows the compensation layer to address diffraction issues only in the critical regions while maintaining simplicity in other areas, thus reducing overall structural complexity.
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 solution significantly reduces the diffraction phenomenon, thereby improving the imaging quality of under-screen cameras by ensuring consistent light phase and amplitude across the display panel.
Implementation Method 1
when light passes through the display panel, the diffraction is likely to occur at the conductive layer 310 with grooves, thereby affecting the final imaging quality
Data Source
AI summary
A display panel and a display device, where the display panel includes a substrate, an insulation layer, a conductive layer, a first planarization layer, an OLED layer and an encapsulation layer which are stacked in sequence, where a plurality of first grooves are formed in the conductive layer, and the first planarization layer fills the first grooves and covers the conductive layer; the display panel further includes a compensation layer, where a plurality of second grooves are formed in the compensation layer, and projection of the compensation layer on the substrate at least overlaps with projection of part of the first grooves on the substrate.