Integrated Force Touch Display with Variable Gap

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Solution Overview

Problem

Existing touch-control display devices with force touch-control structures are typically external and separate from the display, leading to complex fabrication processes and resulting in thick, heavy terminals, whereas integrated touch-control display devices lack efficient force touch-control capabilities.

Innovation Solution

A touch-control display device integrating a driving module, a display panel with a first force touch-control component and self-capacitance type touch-control electrodes, and a backlight module with a second force touch-control component, featuring a variable gap between these components, allowing for simultaneous location and force detection through capacitive changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a force touch-control structure is added as an external component to the display device, then force touch-control functionality is achieved, but the device becomes thicker and heavier with complex fabrication process

Engineering Contradiction:

Improveforce touch-control functionalityVSAvoidfabrication process complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the force touch-control component with the display panel by integrating it into the same substrate layer. The force touch-control component is formed on the same substrate as the display pixels, eliminating the need for separate external force touch-control structures and simplifying the fabrication process while maintaining force detection functionality

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If a force touch-control structure is added as an external component to the display device, then force touch-control functionality is achieved, but the terminal becomes thick and heavy

Engineering Contradiction:

Improveforce touch-control functionalityVSAvoidterminal weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of stationary object

Solution Approach 1:

The force touch-control component is merged with the display panel structure, sharing the same substrate and integrated manufacturing process. This integration eliminates the need for separate force touch-control layers and materials, reducing overall device weight while maintaining force detection capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The substrate serves multiple functions: it acts as both the structural base for display pixels and the foundation for the force touch-control component. This multi-functionality reduces the need for additional materials and structural elements, thereby reducing weight

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Length of moving object

If touch-control electrodes are integrated within the display device, then device thickness and weight are reduced, but force touch-control detection capability is lost

Engineering Contradiction:

Improvedisplay device thicknessVSAvoidforce touch-control detection capability

Core Design Contradiction:

Length of moving objectVSAdaptability or versatility

Solution Approach 1:

The patent merges the force touch-control component with the display panel by integrating it into the same substrate layer. The force touch-control component is formed on the same substrate as the display pixels, eliminating the need for separate external force touch-control structures and simplifying the fabrication process while maintaining force detection functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The force touch-control component utilizes the dynamic response of the substrate to applied forces. When pressure is applied, the substrate deforms and this deformation is detected by the integrated force touch-control component, enabling force detection without adding significant thickness

Inventive Principle:

Principle #15Dynamics

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 integration of force touch-control and self-capacitance touch-control components within the display device results in a thinner, lighter, and more integrated solution with simplified manufacturing, enabling accurate detection of pressure forces and locations while maintaining image quality.

Implementation Method 1

The first touch-control component comprises a plurality of first electrodes arranged in a matrix. The second force touch-control component is an electrical conductive layer. The self-capacitance type touch-control electrode comprises a plurality of second electrodes arranged in a matrix.

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

allowing for simultaneous location and force detection through capacitive changes

Methodology Applied

Scientific EffectElectrical capacitance detection: Capacitance

Data Source

PatentUS10324551B2Touch-control display device

Publication Date: 2019.06.18 XIAMEN TIANMA MICRO ELECTRONICS

AI summary

A touch-control display device includes a driving module, a display panel having a first force touch-control component and a self-capacitance type touch control-electrode, and a backlight module disposed with the display panel and having a second force touch-control component, with a variable gap formed between the first force touch-control component and the second force touch-control component. The first touch-control component comprises a plurality of first electrodes arranged in a matrix. The second force touch-control component is an electrical conductive layer. The self-capacitance type touch-control electrode comprises a plurality of second electrodes arranged in a matrix.