Position Detection Device Dynamic Coordinate Range Adjustment
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Solution Overview
Problem
Existing position detection devices face difficulties in accurately pointing targets on a display surface, especially when using pointing elements of varying lengths, due to wobble and displacement issues, which affect operability.
Innovation Solution
A position detection device that includes a detection section, a discrimination section, and a processing section to associate operations with pointing elements, where the discrimination section adjusts the coordinate range based on the length of the pointing element, treating coordinates within a predetermined range as the same, even if the pointing element changes, to improve operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pointing element of larger size is used, then the ease of operation is improved, but the measurement precision deteriorates due to wobble and displacement
Solution Approach 1:
The patent changes the parameter of coordinate range threshold dynamically based on the type of pointing element detected. For larger pointing elements like pens, a larger coordinate range is accepted, while for smaller elements like fingers, a smaller range is required. This resolves the contradiction by adapting the precision requirement to match the physical characteristics of the pointing element being used.
Solution Approach 2:
The system dynamically adjusts the coordinate range threshold based on real-time detection of the pointing element type. The discrimination section identifies whether a pen, finger, or other element is being used and accordingly modifies the acceptable coordinate deviation range, making the system adaptive rather than static.
2Ease of operation
If the coordinate range is increased to accommodate wobble, then the ease of operation is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the coordinate range threshold based on the detected pointing element type. When a pen is detected, a larger coordinate range is permitted, effectively reducing the precision requirement for that element type. This resolves the contradiction by making precision requirements flexible rather than fixed.
3Manufacturing precision
If the coordinate range is decreased for higher precision, then the manufacturing precision is improved, but the ease of operation deteriorates
Solution Approach 1:
The system changes the coordinate range parameter dynamically based on the pointing element type. For elements prone to wobble like pens, a larger coordinate range is accepted, improving ease of operation. For more precise elements, a smaller range maintains accuracy. This resolves the contradiction by adapting precision requirements to match the capabilities and characteristics of different pointing elements.
Data Source
AI summary
A position detection device includes a detection section adapted to detect an operation to a screen, a detection control section adapted to discriminate the pointing element with which the operation is performed, and then associate the operation with the pointing element, and a processing section adapted to process the operation associated with the pointing element out of the operations. In the case in which a first operation and a second operation, which is performed within a predetermined period of time before the first operation, with a single pointing element are detected, and a coordinate of the first operation and a coordinate of the second operation are located within a predetermined range, the detection control section determines the coordinate of the first operation as the same coordinate as the coordinate of the second operation. Further, the detection control section changes the predetermined range in accordance with the pointing element.