Back-Facing Touch Panel for Single-Handed Scroll and Pinch Control
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Solution Overview
Problem
Current information terminals, such as smartphones, face challenges in scroll and pinch operations due to finger obstruction on the screen, mistaken click actions during scrolling, and the need for two-handed operations for pinch in/out functions, making these actions inconvenient and non-intuitive.
Innovation Solution
An information terminal design featuring interconnected housings with front and back-facing display and touch panels, where a detection unit identifies actuations on the back-facing touch panel and controls the onscreen display of the front-facing panel, allowing single-handed operations and preventing mistaken clicks during scrolling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the user sets their finger on the front-facing display screen to perform scrolling, then scrolling operation can be performed, but the finger obstructs a portion of the display screen from view
Solution Approach 1:
The patent applies inversion by detecting touch operations on the back-facing touch panel instead of the front-facing display screen. When the housing is in the closed state, touch operations performed on the back surface are detected and reflected as display operations on the front-facing screen, thereby eliminating finger obstruction while maintaining scrolling functionality.
2Ease of operation
If the user performs scrolling on the front-facing screen, then scrolling can be performed, but the operation may be mistakenly recognized as a click action causing display to jump to link destination
Solution Approach 1:
The patent introduces the back-facing touch panel as an intermediary surface for detecting scroll operations. By detecting touch movements on the back surface rather than the front display screen, the system can accurately distinguish between scrolling gestures and click actions, preventing mistaken operations while maintaining reliable control.
3Ease of operation
If the user performs pinch out/pinch in operation on the front-facing screen, then enlarging/shrinking can be performed, but the user must use both hands gripping the terminal
Solution Approach 1:
The patent enables pinch operations to be performed on the back-facing touch panel while the user grips the terminal with one hand. By inverting the operation surface from front to back, the system allows single-handed pinch gestures to achieve enlarging and shrinking functions without requiring two-handed coordination.
Data Source
Figure 1(A)~1(B)
Figure 2
Figure 3
AI summary
An information terminal is provided which may contribute to improving ease in actuating a touch panel. The information terminal includes a first housing and a second housing interconnected for opening/ closure, a first display unit and a first touch panel stacked one upon the other on the first housing, and a second display unit and a second touch panel stacked one upon the other on the second housing. The information terminal also includes a detection unit which, in a closed state with the first and second display units superposed one upon the other and facing outwards, detects actuations on one of the first touch panel and the second touch panel that happens to be back-facing as seen from a user. The information terminal further includes a controller that controls an onscreen display on the first display unit or the second display unit that happens to be front-facing as seen from the user, based on information regarding the actuations detected by the detection unit.