Integrated Capacitive-Electromagnetic Touch Layer for Thin Displays

Solution Overview

Problem

Existing liquid crystal displays with capacitive and electromagnetic touch functions are relatively thick due to externally mounted touch screens, which increases thickness and power consumption.

Innovation Solution

Integration of a capacitive-electromagnetic composite touch layer within the liquid crystal panel, comprising electrically insulated capacitive and electromagnetic touch structures, allowing for both touch functions to be embedded internally, reducing thickness and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If independent capacitive and electromagnetic touch screens are externally mounted on the liquid crystal display, then both capacitive and electromagnetic touch functions are achieved, but the display thickness increases

Engineering Contradiction:

Improvetouch function integrationVSAvoiddisplay thickness

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The patent merges the capacitive touch screen and electromagnetic touch screen into a single integrated composite touch screen structure. The capacitive touch layer and electromagnetic touch layer are combined within the same display module, allowing both touch functions to be achieved simultaneously without requiring separate external assemblies, thus reducing overall display thickness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated composite touch screen serves multiple functions within a single structure. It simultaneously provides capacitive touch detection capability and electromagnetic touch detection capability, making the display device universally compatible with both capacitive touch pens and electromagnetic touch pens without requiring separate touch screen assemblies for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If independent capacitive and electromagnetic touch screens are externally mounted on the liquid crystal display, then both capacitive and electromagnetic touch functions are achieved, but power consumption increases

Engineering Contradiction:

Improvetouch function integrationVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by stationary object

Solution Approach 1:

The patent merges the capacitive touch screen and electromagnetic touch screen into a single integrated composite touch screen structure. The capacitive touch layer and electromagnetic touch layer are combined within the same display module, allowing both touch functions to be achieved simultaneously without requiring separate external assemblies, thus reducing overall display thickness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated composite touch screen serves multiple functions within a single structure. It simultaneously provides capacitive touch detection capability and electromagnetic touch detection capability, making the display device universally compatible with both capacitive touch pens and electromagnetic touch pens without requiring separate touch screen assemblies for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 integrated touch layer enables thinner and more power-efficient liquid crystal displays with capacitive and electromagnetic touch capabilities, improving usability and reducing the overall thickness and power requirements.

Implementation Method 1

a liquid crystal layer sandwiched between the CF substrate and the TFT substrate

Methodology Applied

Scientific EffectElectro-optic effect: Electro-Optic Effects

Implementation Method 2

the integrated capacitive-electromagnetic composite touch layer includes a capacitive touch structure configured to identify capacitive touch signals

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 3

the integrated capacitive-electromagnetic composite touch layer includes an electromagnetic touch structure configured to identify electromagnetic touch signals

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS9639218B2Liquid crystal panel, display device and scanning method thereof

Publication Date: 2017.05.02 SHANGHAI TIANMA MICRO ELECTRONICS CO LTD

AI summary

A liquid crystal panel, a display device and a scanning method thereof is disclosed. The liquid crystal panel includes a CF substrate, a TFT substrate and a liquid crystal layer sandwiched between the CF substrate and the TFT substrate; the CF substrate includes a transparent substrate and an integrated capacitive-electromagnetic composite touch layer located at the inner side of the transparent substrate to identify touch signals; wherein, the integrated capacitive-electromagnetic composite touch layer includes a capacitive touch structure and an electromagnetic touch structure electrically insulated from each other. According to the embodiments of the present invention, the integrated capacitive-electromagnetic composite touch layer is integrated to the inner of the CF substrate, so that the liquid crystal display including the liquid crystal panel of the embodiments of the present invention has capacitive and electromagnetic touch functions and is relatively thin.