Touch Coordinate Conversion for Multi-Source Display Systems
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Solution Overview
Problem
Existing display apparatuses struggle to accurately recognize touch inputs when multiple images from different image input devices are displayed simultaneously, as the touch module is typically connected to only one image input device, leading to misidentification of touch coordinates and malfunctioning of other image input devices.
Innovation Solution
A display apparatus with a communication interface to connect with multiple image input devices, a sensor to sense touch inputs, and a controller that converts actual touch coordinate values into relative coordinate values using screen scale information to accurately identify the touched image and transmit these values to the corresponding image input device, allowing for accurate touch input recognition across multiple images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the touch module is connected to only one image input device, then the device complexity is reduced, but the adaptability to multiple image input devices deteriorates
Solution Approach 1:
The touch module is designed to support multiple image input devices through a unified connection structure. The controller enables the touch module to adaptively respond to touches on different images by receiving image information from multiple sources and determining which image is being touched, allowing one touch module to serve multiple functions without requiring separate touch modules for each device.
2Adaptability or versatility
If the touch module is connected to multiple image input devices, then the adaptability improves, but the device complexity increases
Solution Approach 1:
Multiple image input devices are merged into a single display area through the controller, which receives image information from multiple devices and composite displays them. This allows the touch module to interact with multiple sources through a unified interface, reducing the need for separate connection structures while maintaining adaptability.
3Measurement precision
If actual touch coordinate values are provided directly to the image input device, then the measurement precision is high, but the ease of operation deteriorates due to coordinate mismatch
Solution Approach 1:
The controller acts as an intermediary between the touch module and image input devices. It receives actual touch coordinate values from the touch module, determines which image is being touched based on the coordinates and image information, and then provides the coordinates to the appropriate device. This mediation resolves the coordinate mismatch problem by translating global screen coordinates to device-specific coordinates.
4Ease of operation
If the controller converts touch coordinates using screen scale information, then the ease of operation improves, but the calculation complexity increases
Solution Approach 1:
The controller performs preliminary actions by storing screen scale information for each image input device in advance. When a touch occurs, the controller retrieves the appropriate scale information and performs coordinate conversion based on pre-stored data, rather than calculating conversion parameters in real-time. This reduces calculation complexity during touch operations while maintaining accuracy.
Data Source
AI summary
A display apparatus is provided. The display apparatus includes a communication interface configured to communicate with a plurality of image input devices, a display configured to display a plurality of images provided by the plurality of image input devices on a single screen, a storage configured to store screen scale information of the plurality of image input devices, a sensor configured to sense a touch input on one image of the plurality of images, and a controller configured to convert actual touch coordinate values of an entire screen of the display into relative touch coordinate values corresponding to an image input device which provides a touched image in which the touch input is sensed, according to the screen scale information of the image input device which provides the touched image in response to the touch operation being sensed, and transmit the converted relative touch coordinate values to the image input device which provides the touched image.