Input Device Rigid Connecting Member Vibration Transmission

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Solution Overview

Problem

Existing touch screen configurations experience significant vibration transmission loss when using actuators to provide tactile feedback, limiting the efficiency of vibrating the touch screen effectively.

Innovation Solution

The input device incorporates a vibration generating unit with an actuator and strain detector connected to the display panel via rigid connecting members, which efficiently transmit vibrations and external forces, minimizing transmission loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a compliant suspension member is used to mount the touch screen, then the touch screen component can move relative to the housing component, but vibration transmission loss increases significantly

Engineering Contradiction:

Improvemovement capabilityVSAvoidvibration transmission loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The mounting system is divided into two distinct functional segments: rigid connecting members for vibration transmission and elastic members for shock absorption. This segmentation allows each component to perform its specialized function optimally without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Rigid connecting members are introduced as intermediaries between the actuator and the touch screen to efficiently transmit vibration. The elastic members serve as intermediaries between the rigid connecting members and the housing to absorb shocks while allowing movement.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of energy

If a rigid connecting member is used to connect the actuator to the display panel, then vibration transmission efficiency improves, but the ability to absorb shock and allow movement decreases

Engineering Contradiction:

Improvevibration transmission lossVSAvoidshock and movement restriction

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

The connecting structure is segmented into rigid connecting members for vibration transmission and elastic members for shock absorption and movement allowance. This segmentation resolves the contradiction by distributing different functional requirements to different components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting system uses a composite structure combining rigid materials (for connecting members) and elastic materials (for elastic members). This composite approach allows the system to simultaneously achieve high vibration transmission efficiency and shock absorption capability.

Inventive Principle:

Principle #40Composite materials

3Use of energy by moving object

If a small, low-output actuator is used, then power consumption decreases, but the strength of tactile feedback becomes insufficient

Engineering Contradiction:

Improvepower consumptionVSAvoidtactile feedback strength

Core Design Contradiction:

Use of energy by moving objectVSForce

Solution Approach 1:

The system replaces the need for a high-power actuator with a mechanically efficient vibration transmission path. The rigid connecting members directly transmit actuator vibrations to the display panel, minimizing energy loss and maximizing the effectiveness of the actuator's output.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

Rigid connecting members serve as efficient intermediaries that transmit actuator vibrations with minimal loss to the display panel, amplifying the perceived tactile feedback strength without requiring increased actuator power.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 configuration allows for efficient vibration transmission and tactile feedback, enabling strong tactile feedback even with small, low-output actuators, while reducing power consumption and enhancing sensitivity.

Implementation Method 1

the vibration generating unit is arranged on the back side of the display panel and connected to a securing portion provided on the back surface of the display panel via a rigid connecting member

Methodology Applied

Scientific EffectVibration: Vibration

Implementation Method 2

a vibration generating unit having an actuator and a strain detector

Methodology Applied

Scientific EffectStrain detection:

Data Source

PatentUS11573640B2Input device

Publication Date: 2023.02.07 FAURECIA CLARION ELECTRONICS CO LTD

AI summary

The input device includes an LCD panel, a touch sensor arranged over the surface of the LCD panel, and a vibration generating unit having an actuator and a strain detector, the vibration generating unit being arranged on the back side of the LCD panel and connected to a securing portion provided on the back surface of the LCD panel via a rigid connecting member.