Wireless Screen Magnification Touch Filtering via UIBC

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Solution Overview

Problem

During screen mirroring, the small screen size of mobile devices causes frequent touch errors due to indistinguishable screen movement and scroll inputs when the screen is magnified, leading to undesired operations on the TV.

Innovation Solution

A wireless system that includes a sink device and a source device, where the sink device receives touch inputs, transmits appropriate messages through a user input back channel (UIBC) to ignore touch movement inputs intended for screen magnification, allowing for improved input convenience and preventing undesired operations on the source device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the screen of the mobile device is magnified to improve visibility, then the viewing experience is improved, but touch input accuracy deteriorates causing frequent touch errors and undesired operations

Engineering Contradiction:

Improvescreen visibilityVSAvoidtouch input accuracy

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent introduces an intermediary mechanism (touch movement detection module and message transmission control) between the touch input and the source device to distinguish and filter magnification gestures from other touch operations. This intermediary layer analyzes touch patterns and selectively transmits or blocks messages to prevent undesired operations on the magnified screen.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If touch input is transmitted freely to enable full functionality, then operation flexibility is maintained, but undesired operations occur due to indistinguishable touch inputs for magnification and other operations

Engineering Contradiction:

Improveoperation flexibilityVSAvoidundesired operations

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The system implements feedback by monitoring touch input patterns and dynamically adjusting message transmission based on detected gestures. When magnification touch movements are detected, the system provides feedback by blocking corresponding messages to the source device, thereby preventing undesired operations while maintaining normal operation flexibility for non-magnification inputs.

Inventive Principle:

Principle #23Feedback

3Ease of operation

If all touch inputs are transmitted to the source device, then complete control is achieved, but screen movement and scroll operations cannot be distinguished leading to operation errors

Engineering Contradiction:

Improvecontrol completenessVSAvoidtouch input distinction

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The patent segments touch inputs into distinct categories by analyzing touch movement patterns. The system separates magnification gestures from scroll and other operations by detecting specific touch characteristics, thereby preserving complete control functionality while preventing information loss through selective message transmission based on input type.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11797257B2Wireless device and wireless system capable of touch based screen magnification

Publication Date: 2023.10.24 LG ELECTRONICS INC

AI summary

A wireless device may display a second content image based on content image data received from an external device which is displaying a first content image, receive touch down input, transmit a first message indicating the received touch down input to the external device through a user input back channel (UIBC), receive touch movement input, and transmit a second message including a command to ignore the first message to the external device through the UIBC, upon determining that the received touch movement input is input for screen magnification.