Contactless Touch Position Correction for Spatial Objects
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Solution Overview
Problem
Existing contactless touch display and input devices face challenges in accurately detecting and correcting position shifts during contactless touch operations, leading to erroneous inputs due to the difficulty in recognizing the spatial object's position, especially when viewed obliquely or with fingertip position fluctuations.
Innovation Solution
A display and input device system that includes a contactless position detector and a controller to detect position shifts and correct the spatial object's position by aligning its center with the fingertip's position, using a spatial coordinate system and a screen coordinate system separated by a predetermined distance, allowing for accurate contactless touch operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If contactless touch operation is performed without touching the screen, then user convenience and hygiene are improved, but position detection accuracy deteriorates due to position shifts and oblique viewing angles
Solution Approach 1:
The system detects the actual position of the contactless touch operation, calculates the position shift relative to the spatial object center, and feeds back this information to correct the spatial object position. This closed-loop feedback mechanism continuously adjusts the spatial object to align with the user's intended target, compensating for position shifts caused by oblique viewing or fingertip fluctuations.
Solution Approach 2:
The system dynamically changes the position parameter of the spatial object based on the detected touch position and calculated shift. By adjusting the spatial object's coordinates in real-time, the system adapts to varying touch positions and maintains accurate operation recognition despite contactless positioning variations.
2Reliability
If the operable object size is expanded to prevent erroneous operations, then operation reliability is improved, but the precision of spatial object positioning deteriorates
Solution Approach 1:
The position correction mechanism provides real-time feedback that maintains spatial object positioning precision regardless of operable object size. By continuously detecting touch positions and correcting spatial object alignment, the system ensures accurate positioning even when operable objects are expanded to improve reliability and prevent erroneous operations.
Data Source
AI summary
A display and input device includes a display device, a contactless position detector, and a controller. The display device displays an operable object on a screen. The contactless position detector detects a position of a contactless touch operation performed on a spatial object, predefined at a position corresponding to the operable object separated from the screen by a predetermined distance. The controller includes a processor, and detects, when the processor executes a control program, a position shift of the contactless touch operation with respect to a center of the spatial object, when the position of the contactless touch operation detected by the contactless position detector is in the spatial object, and corrects the position of the spatial object by making the center of the spatial object coincide with the position of the contactless touch operation, on a basis of the detected position shift.