LCD Substrate Image Input Hole Formation via Dummy Wire Thickness Measurement

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Solution Overview

Problem

The integration of a camera lens into a liquid crystal display (LCD) increases the overall thickness of the device, and existing methods for forming an image input hole in the LCD substrate can lead to defects and require additional manufacturing processes, making it challenging to precisely determine the hole's location and depth.

Innovation Solution

A method involving a dummy wire on the first substrate, where the wire is used to measure the substrate's thickness and guide the formation of an image input hole without damaging the second substrate, allowing for precise placement and depth determination of the hole using a laser beam and incising tool, thereby improving the defect rate and manufacturing efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an image input hole is formed in the LCD substrate to integrate a camera lens, then the device functionality is improved, but the overall thickness of the device increases

Engineering Contradiction:

Improvedevice functionalityVSAvoidoverall thickness

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The camera lens is integrated by forming an image input hole through the first substrate and positioning the lens within the display device structure, nesting the camera component within the existing LCD assembly to achieve multi-functionality while managing thickness

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If an image input hole is formed in the first substrate, then camera integration is enabled, but the second substrate may be damaged

Engineering Contradiction:

Improvecamera integrationVSAvoidsecond substrate integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The thickness of the first substrate is measured before forming the image input hole, allowing the drilling depth to be precisely controlled to stop before reaching the second substrate, thus preventing damage while enabling camera integration

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

A laser beam is used to measure the substrate thickness and guide the drilling process, replacing traditional mechanical measurement methods with optical measurement for higher precision and non-contact operation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If traditional methods are used to form an image input hole, then the hole can be created, but manufacturing defects increase and additional processes are required

Engineering Contradiction:

Improvehole formationVSAvoidhole location and depth precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

A laser beam is used both to measure the substrate thickness and to guide the drilling process, replacing traditional mechanical measurement and positioning methods with optical fields for higher precision and reduced manufacturing defects

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The laser beam measurement of substrate thickness provides feedback information that is used to control the drilling depth, creating a closed-loop process that ensures precise hole formation without damaging the second substrate

Inventive Principle:

Principle #23Feedback

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

This approach enables the precise formation of an image input hole in the LCD substrate, reducing manufacturing defects and shortening the production process while maintaining the integrity of the second substrate, thus enhancing the overall manufacturing efficiency and reducing waste.

Implementation Method 1

measuring a laser beam reflected from the dummy wire on the first substrate

Methodology Applied

Scientific EffectLaser: Laser

Data Source

PatentUS12259602B2Display panel substrate defining hole for input image device and liquid crystal display having the same

Publication Date: 2025.03.25 TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD

AI summary

A liquid crystal display includes a first substrate including: a display area including a plurality of pixels on the first substrate, a non-display area which is disposed on an outside of the display area and in which a dummy wire is disposed on the first substrate, and an image input hole which is defined therein in the non-display area and in which an image input device is disposed, a second substrate facing the first substrate and including a display area and a non-display area corresponding to those of the first substrate, a liquid crystal layer interposed between the first and second substrates, and a sealant which is in the non-display area of the first and second substrates and seals the liquid crystal layer between the first and second substrates. The dummy wire is disposed near the image input hole.