Dual-Sided Touch Display Layout for User Direction Identification

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Solution Overview

Problem

Existing display devices with touch detection functionality cannot differentiate between left-side and right-side users, potentially allowing unauthorized touch operations by users who cannot visually recognize the displayed images.

Innovation Solution

A display device with a configuration of first and second electrodes and a detection system that determines the direction of approach to identify whether a detection target is a left-side or right-side user, enabling or disabling touch operations based on user visibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If touch detection functionality is added to a dual-screen display device, then touch operations can be detected, but the device cannot identify whether the detection target is a left-side user or a right-side user, potentially allowing unauthorized touch operations

Engineering Contradiction:

Improvetouch detection capabilityVSAvoiduser identification accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The first electrodes are divided into left-side first electrodes and right-side first electrodes based on their positional relationship with the display region. The determination processor segments the detection process by identifying which side the detection target approaches from, thereby enabling accurate user identification while maintaining touch detection functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first electrodes serve as an intermediary element between the touch detection functionality and user identification. By detecting the position and movement direction of the detection target relative to the left-side and right-side first electrodes, the system can determine user identity without directly observing the user.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the display device allows touch operations by any detected user, then ease of operation is improved, but security is compromised as users who cannot visually recognize the image can perform unauthorized operations

Engineering Contradiction:

Improvetouch operation accessibilityVSAvoidauthorized operation security

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The determination processor applies different operation permissions to different users based on their identified side. Left-side users are permitted to perform touch operations on the left-side display region, while right-side users are permitted to perform touch operations on the right-side display region, ensuring both ease of operation and security.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The determination processor performs preliminary identification of the user's side before allowing touch operations. By determining whether the detection target is a left-side user or right-side user in advance, the system prevents unauthorized operations by blocking users from operating the display region they cannot visually recognize.

Inventive Principle:

Principle #9Preliminary anti-action

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

Enables touch operations by one user while preventing operations by another user based on their visual recognition capabilities, enhancing user-specific control and preventing unauthorized interactions.

Implementation Method 1

a plurality of first electrodes provided in a frame region outside the display region... detect a detection target based on detection signals of the first electrodes

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS12542891B2Display device

Publication Date: 2026.02.03 MAGNOLIA WHITE CORP

AI summary

First electrodes include a left-side first electrode disposed on a left side of a virtual line bisecting a display region and passing through a geometric center of the display region, and a right-side first electrode disposed on a right side of the virtual line, and a detector includes a determination processor configured to determine a detection target moving from the left side to the right side to be a left-side user approaching from the left side based on a detection value of the left-side first electrode, and determine the detection target moving from the right side to the left side of the display region to be a right-side user approaching from the right side based on a detection value of the right-side first electrode.