Position Detection Device Dynamic Range Adjustment
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Solution Overview
Problem
Existing position detection devices face challenges in accurately detecting the intended position on a display surface due to hand wobbling or parallax errors when using pointing elements like pens or hands, leading to difficulties in precise operation, especially for users unfamiliar with the device or those operating from a distance.
Innovation Solution
A position detection device that includes a detection section, an identification section, and a processing section, which associates operations with pointing elements and adjusts the coordinate range based on detection position, treating nearby operations as the same coordinate to improve operability, and uses an emission section to emit detection light for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed detection range is used for all positions on the display surface, then the device structure is simple, but the position detection accuracy varies by location (worsening at positions farther from the detection section)
Solution Approach 1:
The patent applies dynamics by making the detection range variable rather than fixed. The control section dynamically adjusts the detection range based on the distance between the detection section and the pointed position on the display surface. This allows the system to adapt to different operational conditions, improving detection accuracy at various positions without requiring multiple physical detection sections.
Solution Approach 2:
The patent changes the parameter of detection range according to the spatial relationship between the detection section and the pointed position. By modifying the detection range parameter based on distance, the system maintains optimal detection accuracy across different locations on the display surface, resolving the contradiction between simplicity and accuracy.
2Measurement precision
If a smaller detection range is used, then the position detection precision is higher, but the operability decreases for users with hand wobbling or from distance
Solution Approach 1:
The system dynamically adjusts the detection range based on the detected position on the display surface. When the pointed position is farther from the detection section or when hand stability is compromised, the detection range is automatically enlarged. This dynamic adaptation allows users with hand wobbling or operating from a distance to still achieve accurate position detection, as the system compensates for their reduced precision.
Solution Approach 2:
The detection range parameter is changed according to the spatial context and operational conditions. By adjusting this parameter, the system balances precision and ease of operation - using a smaller range when high precision is needed and a larger range when user stability is compromised, thereby resolving the contradiction between precision and operability.
3Ease of operation
If a larger detection range is used, then the ease of operation is improved for users with hand wobbling, but the position detection accuracy decreases
Solution Approach 1:
The system employs dynamic adjustment of the detection range based on real-time conditions. When a user operates from a distance or exhibits hand wobbling, the system detects this and enlarges the detection range to maintain ease of operation. Conversely, when precise operation is possible, the range is reduced to maintain accuracy. This dynamic behavior resolves the contradiction by adapting to operational context.
Solution Approach 2:
The detection range parameter is adjusted according to the operational context and detected position. This parameter change strategy allows the system to optimize both ease of operation and detection accuracy by selecting the appropriate range based on current conditions, rather than using a fixed value that would compromise one or the other.
4Measurement precision
If the detection range is adjusted based on detection position, then the position detection accuracy is improved across the display surface, but the processing complexity increases
Solution Approach 1:
The control section implements dynamic detection range adjustment based on the detected position coordinates. The processing involves calculating the distance from the detection section to the pointed position and selecting an appropriate detection range accordingly. This dynamic processing approach improves overall detection accuracy across the display surface while keeping the processing logic relatively simple and rule-based.
Solution Approach 2:
The system changes the detection range parameter based on the detection position, using a straightforward calculation of distance or position coordinates. This parameter adjustment strategy improves detection accuracy across different areas of the display surface while maintaining simple processing logic that can be implemented efficiently in the control section.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the operability of pointing elements by reducing errors and improving the accuracy of position detection, especially in cases where users are inexperienced or operating from a distance, by adjusting the coordinate range and using detection light for precise alignment.
Implementation Method 1
an emission section to emit detection light for accurate positioning
Implementation Method 2
shoots the detection light reflected by the pointing element, with which the operation to the display surface is performed, to detect the operation to the display surface
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 identify the pointing element with which the operation is performed, and 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 treats 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 detection position in the screen.