Mobile Terminal Controlling HDMI Device Touch Screen via Handshake

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Solution Overview

Problem

Current mobile terminals can only control HDMI devices through their touch screens, limiting user interaction and experience, especially as HDMI devices become more intelligent and diverse, requiring a method to control touch screens of these devices independently.

Innovation Solution

The mobile terminal includes modules to detect and request control of HDMI device touch screens, establish handshakes, manage touch screen states, and switch between primary and non-primary display areas, using existing HDMI or MHL interfaces to implement control signals, allowing the mobile terminal to control the touch screens of HDMI devices like high-definition televisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the mobile terminal uses only its own touch screen to control HDMI devices, then the control method is simple, but the user interaction and experience are limited

Engineering Contradiction:

Improveuser interaction capabilityVSAvoidcontrol system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The mobile terminal's touch screen is extended to control not only the mobile terminal itself but also external HDMI devices with touch screens. The system achieves multi-functionality by allowing the mobile terminal to act as both a media player and a remote controller for external devices, enabling universal control across different devices through the HDMI interface.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent introduces an intermediary control mechanism where the mobile terminal serves as a mediator between the user and the HDMI device's touch screen. By transmitting touch screen control signals through the HDMI interface, the mobile terminal enables indirect control of external devices without requiring direct physical contact with their touch screens.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If multiple touch screens are allowed to be active simultaneously, then user flexibility increases, but false triggering and control conflicts occur

Engineering Contradiction:

Improvetouch screen control flexibilityVSAvoidcontrol accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system dynamically adjusts the active state of touch screens based on operational context. The mobile terminal can switch between controlling its own touch screen and controlling the HDMI device's touch screen, with the active state changing dynamically according to the current operation mode and user interaction requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements a feedback mechanism where the mobile terminal receives touch screen control signals from the HDMI device and processes them appropriately. The system monitors the state of multiple touch screens and provides feedback to determine which touch screen should be active, preventing false triggering by validating the source and context of each control signal.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2816452B1Method for controlling touch screen, and mobile terminal

Publication Date: 2017.06.28 ZTE CORP

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AI summary

A method for controlling touch screens and a mobile terminal are disclosed. The method includes: a mobile terminal, connected with an HDMI device, requesting the HDMI device for obtaining a right of controlling a touch screen of the HDMI device; and after receiving a permission response message of the HDMI device, the mobile terminal performing a control operation on the touch screen of the HDMI device.