Liquid Crystal Display Device with Detachable Digitizer Installation

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Solution Overview

Problem

Liquid crystal display devices with integrated digitizers face increased manufacturing costs and user inconvenience due to the mandatory installation of digitizers, which can malfunction from electromagnetic interference from the printed circuit board and lack user control over installation.

Innovation Solution

A detachable digitizer installation system within a liquid crystal display device, utilizing an installation unit with three parts to house the digitizer, allowing for easy installation and removal, and a conductive tape system to ground the printed circuit board effectively, reducing electromagnetic interference and bezel size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a digitizer is integrated into the liquid crystal display device, then the device provides touch input functionality, but manufacturing costs increase and users cannot control installation

Engineering Contradiction:

Improvetouch input functionalityVSAvoidmanufacturing costs

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The installation unit is divided into three separate parts that can be independently assembled. The first part attaches to the liquid crystal module, the second part attaches to the printed circuit board, and the third part connects them, creating a modular structure that allows flexible configuration and reduces manufacturing complexity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The installation unit enables the digitizer to be dynamically installed or removed based on user needs. The three-part structure with connection mechanisms allows the digitizer to be selectively attached to the liquid crystal display device, providing adaptability between different operational states

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If a digitizer is installed in the liquid crystal display device, then touch input is enabled, but electromagnetic interference from the printed circuit board causes malfunction

Engineering Contradiction:

Improvetouch input functionalityVSAvoiddigitizer operation stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The installation unit acts as an intermediary structure between the digitizer and the printed circuit board. By positioning the digitizer through this intermediate installation mechanism rather than direct mounting, electromagnetic interference from the printed circuit board is reduced, improving digitizer reliability

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The digitizer is extracted from direct integration with the printed circuit board and instead mounted through the separate installation unit. This separation removes the digitizer from the harmful electromagnetic environment of the printed circuit board while maintaining functional integration

Inventive Principle:

Principle #2Taking out (Extraction)

3Area of stationary object

If the printed circuit board is bent to reduce bezel size, then bezel area decreases, but electromagnetic interference increases

Engineering Contradiction:

Improvebezel areaVSAvoidelectromagnetic interference

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The installation unit serves as an intermediary that allows the printed circuit board to be bent for bezel reduction while simultaneously providing electromagnetic shielding or isolation for the digitizer, thus resolving the conflict between bezel size and electromagnetic interference

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS9547189B2Liquid crystal display device

Publication Date: 2017.01.17 LG DISPLAY CO LTD

AI summary

A liquid crystal display device includes a liquid crystal module; a printed circuit board providing driving signals to the liquid crystal module; and an installation unit including first, second and third parts, wherein the first part is attached to the liquid crystal module, the second part faces the first part and is attached to the printed circuit board, and the third part connects the first and second parts.