Display Panel Shielding Structure for Under-Screen Photosensitive Areas

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Solution Overview

Problem

Existing display panels face challenges in achieving high light transmittance in photosensitive areas, which are crucial for under-screen photosensitivity and full-screen display, with current methods resulting in low transmittance below 18% and inadequate display experience.

Innovation Solution

A display panel design featuring a first display area with a shielding layer comprising first and second shielding sub-parts, and a third shielding sub-part overlapping with a transition area, allowing for laser patterning of metal electrodes from the backside to enhance light transmittance in the photosensitive area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If holes are dug for the photosensitive area to increase light transmittance, then the light transmittance is improved, but the area does not emit light and cannot present a full-screen effect

Engineering Contradiction:

Improvelight transmittanceVSAvoidfull-screen display effect

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The display panel is divided into two distinct areas: a first display area with light-emitting pixels for full-screen display, and a photosensitive area without light-emitting pixels for under-screen photosensitivity. This segmentation allows each area to be optimized independently - the photosensitive area achieves high light transmittance while the first display area maintains display functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different structural characteristics are applied to different areas of the display panel. The photosensitive area has a specific structure optimized for light transmission, while the first display area has a structure optimized for light emission and display. This local differentiation resolves the contradiction between high transmittance and full-screen display effect.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If the pixel density of the photosensitive area is reduced to increase transmittance, then the transmittance is improved, but the transmittance is still less than 18% which cannot meet the requirements

Engineering Contradiction:

Improvelight transmittanceVSAvoidphotosensitivity requirement

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The light-emitting pixels are extracted from the photosensitive area, creating a dedicated region without light-emitting structures. This removal of obstructive elements (light-emitting pixels and their associated structures) from the photosensitive area enables significantly higher light transmittance to exceed the 18% threshold required for photosensitivity functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If a shielding layer is added to protect components from laser patterning damage, then component protection is improved, but light transmittance may be reduced

Engineering Contradiction:

Improvecomponent protectionVSAvoidlight transmittance

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The shielding layer is merged with the pixel electrode structure, forming an integrated component that serves dual functions: protecting underlying components from laser patterning damage during manufacturing, and maintaining light transmittance in the photosensitive area. This merging eliminates the need for separate shielding structures that would compromise transmittance.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pixel electrode structure is designed to perform multiple functions simultaneously: it serves as an electrical conductor for the display function, provides shielding protection during laser patterning manufacturing, and maintains optical transparency for the photosensitive area. This multi-functionality resolves the contradiction between protection and transmittance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The design improves light transmittance in the photosensitive area, enabling efficient under-screen photosensitivity and full-screen display by reducing pixel density and shielding to protect components from laser patterning damage.

Implementation Method 1

allowing for laser patterning of metal electrodes from the backside

Methodology Applied

Scientific EffectLaser: Laser

Implementation Method 2

shielding to protect components from laser patterning damage

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Data Source

PatentUS20250351687A1Display panel and display device

Publication Date: 2025.11.13 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

The present application provides a display panel and a display device. The display panel comprises a substrate layer and a light-emitting layer. The substrate layer comprises a first shielding layer corresponding to a first display area. The light-emitting layer comprises first light-emitting pixels arranged in the first display area and second light-emitting pixels arranged in a second display area. The first shielding layer comprises: a first shielding sub-part corresponding to the first light-emitting pixel and a second shielding sub-part connecting two adjacent first shielding sub-parts.