OLED Display Panel With Cathode Through-Holes for Camera Imaging

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Solution Overview

Problem

Existing OLED display panels face issues with reduced transmittance in regions containing a camera due to the cathode layer, affecting the imaging quality of the camera and display uniformity.

Innovation Solution

The display panel design includes a second cathode layer with through holes and interconnected auxiliary electrode layers to reduce transmittance loss, ensuring better imaging quality and display uniformity by maintaining signal continuity and minimizing diffraction effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a cathode layer is provided in the second display region to enable OLED light emission, then light emission function is achieved, but transmittance is reduced affecting camera imaging quality

Engineering Contradiction:

Improvelight emissionVSAvoidtransmittance loss

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the harmful part (cathode layer) from the system by providing through holes in the second cathode layer, allowing light to pass through to the camera while maintaining OLED light emission function in other areas

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies local quality by creating through holes specifically in the second cathode layer at the camera region, making this local area transparent while keeping other areas opaque for light emission

Inventive Principle:

Principle #3Local quality

2Reliability

If opaque patterns are added to the second display region for pixel circuits, then circuit functionality is achieved, but diffraction effects increase affecting display uniformity

Engineering Contradiction:

Improvecircuit functionalityVSAvoiddiffraction effects

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The auxiliary electrode layer acts as an intermediary component that covers the opaque patterns, reducing their diffraction effects on camera imaging while maintaining electrical connectivity and circuit functionality

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful diffraction effect of opaque patterns into a benefit by using the auxiliary electrode layer to mask these patterns, thereby improving camera imaging quality without sacrificing circuit functionality

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Object-affected harmful factors

If through holes are provided in the second cathode layer to improve transmittance, then camera imaging quality is improved, but cathode layer integrity is compromised

Engineering Contradiction:

Improveimaging qualityVSAvoidcathode layer integrity

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent segments the cathode layer into multiple parts by providing through holes, creating a discontinuous structure that maintains overall integrity while allowing light transmission for improved imaging

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250294986A1Display panel and display device

Publication Date: 2025.09.18 CHENGDU BOE OPTOELECTRONICS TECH CO LTD

AI summary

Provided is a display panel, including: a base substrate provided with a first display region and a second display region; a first auxiliary electrode layer, a first anode layer, a first light-emitting layer and a first cathode layer that are stacked in sequence, in a direction away from the base substrate, in the first display region; and a second auxiliary electrode layer, a second anode layer, a second light-emitting layer, and a second cathode layer that are sequentially laminated, in the direction away from the base substrate, in the second display region; wherein the first auxiliary electrode layer is connected to the first cathode layer and the second auxiliary electrode layer, and the second cathode layer is connected to the first cathode layer, the second cathode layer is provided with at least one through hole.