Display Panel Hollow Electrode Layout for Under-Screen Integration
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Solution Overview
Problem
Conventional electronic devices with integrated components like front cameras and infrared sensors cannot achieve full-screen display due to notches or holes in the display screen, limiting the screen-to-body ratio and transmittance.
Innovation Solution
A display panel design featuring a base plate with a first electrode layer, a pixel definition layer, and a second electrode layer, where the second electrode layer includes hollow portions and orthogonal projections that do not overlap with the first electrode, allowing for improved transmittance and under-screen integration of photosensitive components by using the first electrode layer as a mask during laser etching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a notch or hole is formed on the display screen to integrate photosensitive components, then component integration is achieved, but the screen-to-body ratio and transmittance are reduced
Solution Approach 1:
The patent moves the photosensitive components from the front surface (2D plane) to the back surface of the display panel, utilizing the third dimension (depth/thickness) to resolve the conflict between component integration and screen-to-body ratio. This allows full-frontal display without notches or holes.
Solution Approach 2:
The photosensitive components are nested within the display panel structure itself, specifically positioned in the back plate or between functional layers, rather than being mounted externally. This integration maintains the external dimensions while accommodating additional functionality.
2Adaptability or versatility
If a notch or hole is formed on the display screen to integrate photosensitive components, then component integration is achieved, but light transmittance is reduced
Solution Approach 1:
By relocating photosensitive components to the back surface, the optical path from the front surface remains unobstructed, maintaining full light transmittance through the display panel while still enabling component integration.
Solution Approach 2:
The patent introduces an optical waveguide or light redirecting structure as an intermediary element that captures light from the display and directs it to the photosensitive components on the back surface, enabling both full transmittance and component functionality.
3Quantity of substance
If the second electrode layer is reduced in distribution area to enhance transmittance, then light transmittance is improved, but electrode coverage is reduced
Solution Approach 1:
The electrode pattern is extended from a single-plane configuration to a multi-layer configuration, with electrode portions positioned on both the front and back surfaces of the pixel definition layer, effectively utilizing the third dimension to maintain coverage while improving transmittance.
Solution Approach 2:
The electrode structure is nested across multiple layers, with first electrode portions on the front surface and second electrode portions on the back surface, creating a distributed electrode system that maintains functionality while optimizing light transmission.
4Quantity of substance
If laser etching is used to form hollow portions in the second electrode layer, then transmittance is enhanced, but edge folding due to laser diffraction occurs
Solution Approach 1:
The patent introduces a protective coating specifically in the hollow portion regions that is resistant to laser-induced folding, while leaving other areas unchanged. This localized protection prevents edge folding only where needed without affecting the overall electrode structure or transmittance benefits.
Solution Approach 2:
The protective coating is applied to the second electrode layer before laser etching, providing pre-cushioning protection to the electrode edges against the folding effect that will occur during subsequent laser processing, thereby preventing manufacturing defects.
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 transmittance and enables full-screen display by reducing the distribution area of the second electrode layer, preventing edge folding due to laser diffraction, and facilitating the integration of photosensitive components without affecting packaging processes.
Implementation Method 1
preventing edge folding due to laser diffraction
Implementation Method 2
using the first electrode layer as a mask during laser etching
Data Source
AI summary
A display panel, a display device, and a fabricating method for a display panel. The display panel includes: a base plate; a first electrode layer located on the base plate, where the first electrode layer includes first electrodes; a pixel definition layer located on a side, away from the base plate, of the first electrode layer and including isolation portions and first openings each of which is enclosed by the isolation portion, at least part of the first electrodes being exposed by the first opening; and a second electrode layer, where at least a portion of the second electrode layer is located on a side, away from the base plate, of the pixel definition layer, the second electrode layer includes body portions and hollow portions penetrating the body portions, and orthogonal projections of the hollow portion and the first electrode on the base plate do not overlap.