Flexible Display Panel Bending Unviewable Areas

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Solution Overview

Problem

Large-size electrophoretic display modules have low yield rates due to manufacturing difficulties, and when combining small-size modules, un-viewable areas with wires and driving components create noticeable dark stripes, affecting visual perception.

Innovation Solution

A display panel design featuring a flexible substrate with a more flexible peripheral insulating layer that can be bent to hide un-viewable areas, reducing the visibility of dark stripes between joined modules.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If small-size electrophoretic display modules are combined to form large-size display modules, then the manufacturing yield rate is improved, but dark stripes appear at the boundaries affecting visual perception

Engineering Contradiction:

Improvemanufacturing yield rateVSAvoiddark stripes at boundaries

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The un-viewable area containing wires and driving components is extracted and separated from the viewable area. This is achieved by providing a flexible substrate with a flexible un-viewable area that can be bent away from the front surface, removing the harmful dark stripe elements from the viewer's visual field while maintaining the modular combination approach for large-size displays

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The un-viewable area is moved from the two-dimensional plane of the display front surface to a third dimension by bending it backwards along the flexible substrate. This dimensional transition allows the wires and driving components to be positioned behind the display panel, eliminating their visual interference while preserving electrical connectivity

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If wires and driving components are arranged in un-viewable areas of small-size modules, then the modules can function independently, but the boundaries show large-size dark stripes when joined

Engineering Contradiction:

Improveindependent module functionVSAvoiddark stripes at boundaries

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The flexible substrate serves as a flexible shell that allows the un-viewable area to be bent and positioned behind the display panel. This flexible structure maintains the independence of each module by providing space for wires and driving components while eliminating their visual impact when modules are joined to form larger displays

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS10025156B2Display panel

Publication Date: 2018.07.17 E INK HLDG INC

AI summary

A display panel includes a flexible substrate, a first conductive layer, an insulating layer, a second conductive layer and a display layer. The flexible substrate includes a central area and at least one peripheral area. The first conductive layer is disposed on the flexible substrate. The insulating layer is disposed on the first conductive layer. The insulating layer includes a central insulating portion and at least one peripheral insulating portion. The peripheral insulating portion is located above the peripheral area. The central insulating portion is located above the central area. The peripheral insulating portion is more flexible than the central insulating portion. The second conductive layer is disposed on the insulating layer, and the insulating layer separates the first conductive layer from the second conductive layer. The display layer is disposed on the second conductive layer.