Molding Die for Display Back Cover Hemming

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Solution Overview

Problem

The manufacturing of OLED displays is hindered by the need for a separate cabinet to prevent side surfaces of the back cover and pad from being exposed, leading to increased product costs and complexity.

Innovation Solution

A die system for molding the back cover of a display, comprising multiple dies with specific shapes and configurations, allows for the hemming of the back cover to finish the side of the display without a separate middle cabinet, using double-sided tapes to bond the back cover with other components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a separate cabinet is used to prevent side surfaces of the back cover and pad from being exposed, then the side surfaces are protected, but the unit cost increases and a separate process is required

Engineering Contradiction:

Improveexposure of side surfacesVSAvoidstructure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent merges the protective function previously requiring a separate cabinet into the back cover itself by forming a groove that receives and integrates the pad, eliminating the need for additional structural components while still protecting the side surfaces

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The back cover is designed to serve multiple functions: it provides structural support, houses the pad within its groove, and protects the side surfaces, thereby eliminating the need for a separate cabinet component

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Object-affected harmful factors

If a separate cabinet is used to prevent side surfaces of the back cover and pad from being exposed, then the side surfaces are protected, but manufacturing cost increases

Engineering Contradiction:

Improveexposure of side surfacesVSAvoidmanufacturing cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The protective function is merged into the back cover design itself through the groove structure, eliminating the need for a separate cabinet component and reducing manufacturing costs

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The unnecessary cabinet component is extracted from the design, leaving only the essential back cover with an integrated groove structure that provides the same protective function at lower cost

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11148185B2Method of molding back cover of display and die for molding back cover

Publication Date: 2021.10.19 OHSUNG D&E CO LTD

AI summary

A method of molding a back cover of a display and a die for molding the back cover are provided. More particularly, a method of finishing a side of a display by using a back cover is provided. A die for molding a back cover of a display includes: an upper die in which a lower inner side thereof has a fan shape with a certain curvature, and an inner side of the fan shape has a flat shape; a first lower die which is disposed below the upper die and in which an upper inner side thereof has a shape corresponding to the fan shape formed in the upper die, and an inner side of the fan shape is dent downward by a certain length; and a second lower die in which an upper portion thereof has a flat shape, and an end upper portion thereof protrudes toward the first lower die by a certain length.