Shading Thin Film Between Backboard and Supporting Layer for OLED Light Leakage

Solution Overview

Problem

The changed staking structure of OLED display modules, where the buffer layer is disposed on one side of a supporting layer away from the panel main body, results in unshielded light leakage of the panel main body, compromising pen/ball drop performance.

Innovation Solution

A display panel design that includes a shading thin film disposed between the backboard and the supporting layer, laminated on one side of the backboard close to the supporting layer and/or on one side of the supporting layer close to the backboard, effectively shielding light leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the buffer layer is disposed on one side of the supporting layer away from the panel main body to improve pen/ball drop performance, then the pen/ball drop performance is improved, but the light leakage of the panel main body cannot be shielded

Engineering Contradiction:

Improvepen/ball drop performanceVSAvoidlight leakage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The shading function is segmented from the buffer layer and implemented as a separate shading thin film. This allows the buffer layer to be repositioned for improved pen/ball drop performance while the shading thin film independently provides light leakage shielding.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The shading thin film acts as an intermediary element between the backboard and supporting layer. It specifically targets and shields light leakage from the panel main body without interfering with the buffer layer's function in improving pen/ball drop performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the buffer layer position is changed to away from panel main body, then module pen/ball drop performance is improved, but light leakage shielding capability deteriorates

Engineering Contradiction:

Improvepen/ball drop performanceVSAvoidlight leakage

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The shading function is segmented from the buffer layer and implemented as a separate shading thin film. This allows the buffer layer to be repositioned for improved pen/ball drop performance while the shading thin film independently provides light leakage shielding.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The shading thin film acts as an intermediary element between the backboard and supporting layer. It specifically targets and shields light leakage from the panel main body without interfering with the buffer layer's function in improving pen/ball drop performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12279514B2Display panel, manufacturing method thereof, and mobile terminal

Publication Date: 2025.04.15 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

A display panel, a manufacturing method thereof, and a mobile terminal are provided. The display panel includes a panel main body, a backboard, and a supporting layer sequentially stacked. Wherein, a shading thin film is disposed between the backboard and the supporting layer, and the shading thin film is laminated on one side of the backboard close to the supporting layer and/or on one side of the supporting layer close to the backboard.