Light-Shielding Tape in Camera Through-Holes for Display Devices

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Solution Overview

Problem

Display devices with integrated cameras and sensors face issues of light leakage and bright spot defects due to holes in the panel structure, which can lead to damage and reduced performance.

Innovation Solution

A display device design that uses light-shielding tape instead of conductive black ink in the through-holes of the camera area to prevent light leakage and static electricity, featuring a double pressing technique for secure attachment of the tape.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a hole is defined in the panel to place a camera, then the camera can be integrated into the display device, but light leakage occurs through the hole

Engineering Contradiction:

Improvecamera integrationVSAvoidlight leakage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

A light-shielding tape is introduced as an intermediary component between the camera and the display panel. The tape is disposed in the through-hole of the camera area to block light from leaking through the hole, while still allowing the camera to be integrated into the display device.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The light-shielding tape is a thin film structure that is flexible enough to be disposed in the through-hole of the camera area. The tape effectively blocks light leakage while maintaining the integrated design of the camera and display panel.

Inventive Principle:

Principle #30Flexible shells and thin films

2Object-affected harmful factors

If conductive black ink is used in the through-hole, then light leakage is prevented, but the manufacturing process becomes more complex and costly

Engineering Contradiction:

Improvelight leakage preventionVSAvoidmanufacturing process complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The light-shielding tape is a simple, cost-effective component that replaces the more complex and expensive conductive black ink process. The tape can be easily manufactured and disposed of, making the overall manufacturing process simpler and more cost-effective.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The light-shielding function is extracted from the conductive black ink process and implemented as a separate light-shielding tape component. This extraction simplifies the manufacturing process by allowing the tape to be applied independently without requiring the complex black ink deposition process.

Inventive Principle:

Principle #2Taking out (Extraction)

3Object-affected harmful factors

If conductive black ink is used in the through-hole, then light leakage is prevented, but manufacturing costs increase

Engineering Contradiction:

Improvelight leakage preventionVSAvoidmanufacturing cost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The light-shielding tape is a inexpensive component that effectively prevents light leakage. The tape can be manufactured using simple processes and applied to the camera area, significantly reducing manufacturing costs compared to using conductive black ink.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

4Object-affected harmful factors

If the light-shielding tape is securely attached, then light leakage is prevented, but the attachment process becomes more complex

Engineering Contradiction:

Improvelight leakage preventionVSAvoidattachment process complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The attachment process of the light-shielding tape is merged with the existing camera integration process. The tape is disposed in the through-hole during the same manufacturing steps used to install the camera, eliminating the need for separate attachment processes and reducing overall complexity.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution effectively reduces light leakage and bright spot defects, enhancing the durability and performance of the display device while also lowering manufacturing costs and simplifying the production process.

Implementation Method 1

a light-shielding tape is disposed along and attached to an inner side surface of the through-hole of each of the panel and the plate

Methodology Applied

Scientific EffectLight shielding: Absorption (EM radiation)

Implementation Method 2

charges generated by friction on a cover member do not escape to a metal plate but flow into the panel to damage the panel, resulting in a bright spot defect

Methodology Applied

Scientific EffectTriboelectric effect: Triboelectric Effect

Data Source

PatentUS20240224703A1Display Device and Method for Manufacturing the Same

Publication Date: 2024.07.04 LG DISPLAY CO LTD

AI summary

Disclosed are a display device and a method for manufacturing the same, in which black ink of a conductive material is not disposed and a light-shielding tape is disposed and attached to a through-hole of a camera area formed to receive therein a camera of a hole in display. A plate is disposed under a panel in which a camera area including a first hole area is formed in a display area, and the through-hole are formed in each of the panel and the plate in the camera area, and the light-shielding tape extends along and is attached to an inner side surface of the through-hole. Therefore, the light-shielding tape is attached to the through-hole of the camera area by a double pressing technique, thereby preventing light-leakage and reducing a bright spot defect.