Touch Terminal Composite Screen for External Display
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Solution Overview
Problem
When a projector is connected to a display terminal device, it is difficult for participants to understand the relation between touch operations on the terminal screen and the corresponding changes in displayed contents, as the touch operation details are not clearly visible due to the display screen being obscured by a finger or palm.
Innovation Solution
A display terminal device with a detecting section to capture touch operations, a judging section to determine if an external transmission mode is set, and a superimposing section to generate a composite screen by overlaying operation information on the displayed contents, which is then transmitted to an external display device for clear demonstration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If touch operation details are transmitted to external display device for display, then participants can understand touch operations, but display contents near the touched point become difficult to view
Solution Approach 1:
The patent segments the display information into two separate channels: the terminal device display screen shows only the original display contents without obstruction, while the external display device shows the touch operation details. This segmentation allows both touch operation information and display contents to be viewed simultaneously in their respective locations, resolving the contradiction between information transmission and viewable area.
2Loss of information
If a mark indicating touched point is displayed on terminal screen, then touch operation state is visible, but operability on terminal side is impaired
Solution Approach 1:
The patent extracts the touch operation state information from the terminal display screen and transfers it to the external display device. The terminal screen displays only the original display contents without any marks or indicators, maintaining full operability. The external display device separately displays the touch operation details, ensuring both operability and information visibility.
3Ease of operation
If display screen is obscured by finger or palm during touch operation, then touch operation can be performed, but projected contents become difficult to view
Solution Approach 1:
The patent introduces the external display device as an intermediary that captures and displays the touch operation state information separately from the terminal screen. The terminal screen remains unobscured for normal operation, while the external display device acts as a mediator to show the touch operation details to participants, resolving the conflict between touch operation capability and content visibility.
Data Source
AI summary
The present invention is to maintain the viewability of display without impairing operability on a terminal side, even when the details of a touch operation performed on a display terminal device are transmitted to an external display device for display. In the present invention, when a touch operation is detected in an external transmission mode, the display terminal device generates details of a composite screen obtained by superimposing operation information (operation icon or animation image) indicating details of the touch operation on contents being displayed on the display screen (terminal screen), and transmits the contents of the composite screen to the external display device so as to change display contents on the external display device (display contents on its screen).