Curved Display Panel Layout to Prevent Edge Touch and Film Breakage

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Solution Overview

Problem

Existing display panels with curved surfaces face issues of film layer breakage during manufacturing and unintended touch signals in the curved areas, affecting user experience.

Innovation Solution

A display panel design with a flat area and first curved areas at the ends, featuring a base layer extending into the curved areas, a touch layer only in the flat area, and a filling layer in the curved areas made of organic material to prevent breakage and touch signals, along with a planarization layer covering the touch and filling layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the touch layer extends into the curved display area, then the display panel can detect touch signals across the entire screen, but the film layers in the curved area are prone to breakage during manufacturing

Engineering Contradiction:

Improvetouch detection coverageVSAvoidfilm layer integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The display panel is divided into a flat display area and a curved display area. The touch layer is segmented to exist only in the flat display area, while the curved display area has no touch layer. This segmentation allows the touch layer to avoid the high-stress curved regions, preventing breakage during manufacturing while maintaining touch functionality where needed.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the touch layer is present in the curved display area, then touch functionality is provided across the entire screen, but users can easily touch the curved area and generate unintended touch signals

Engineering Contradiction:

Improvetouch functionalityVSAvoidunintended touch signals

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The touch layer is extracted from the curved display area and retained only in the flat display area. This extraction eliminates the source of unintended touch signals in the curved region, as there is no touch layer to generate false touch inputs when users accidentally touch the curved edges of the display.

Inventive Principle:

Principle #2Taking out (Extraction)

3Shape

If the curved display area has a larger curvature, then the screen-to-body ratio is enhanced, but the film layers become more prone to breakage

Engineering Contradiction:

ImprovecurvatureVSAvoidfilm layer stability

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

Different structural qualities are applied to different regions of the display panel. The flat display area maintains a complete multi-layer structure including the touch layer, while the curved display area has a simplified structure without the touch layer. This local quality differentiation allows the curved area to achieve high curvature for enhanced screen-to-body ratio without the film layers breaking, as the problematic touch layer is absent from the high-stress region.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11903293B2Display panel and manufacturing method for display panel

Publication Date: 2024.02.13 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

A display panel and a manufacturing method for a display panel are provided. The display panel includes a base layer, a touch layer, and a filling layer. In the present application, the touch layer only disposed in the flat display areas, so that the first curved display areas only have display functions without touch functions. Therefore, when a user touches the first curved display panel areas, no touch signal is generated, and other operations of the user are not affected, thereby improving the user.