Dynamic Stiffness Control for Touch Panel Display Arm
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Solution Overview
Problem
Existing arm control systems for touch panel displays require users to constantly contact the bezel to move the display, limiting user interaction and making it difficult to hold the display with other parts, especially when using a touch panel display, as it moves unintentionally with touch inputs.
Innovation Solution
An arm control apparatus that includes a display information acquiring unit, a touch pattern estimating unit, and a stiffness parameter information generating unit to control the arm's stiffness based on estimated touch regions and motion directions, allowing the touch panel display to remain stationary during touch inputs, enabling users to move and interact with the display without moving it unintentionally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the arm stiffness is reduced to enable easy movement of the touch panel display, then the maneuverability is improved, but the display moves unintentionally during touch inputs
Solution Approach 1:
The arm stiffness is made dynamically adjustable based on the detected touch pattern. When a touch input is detected, the stiffness is increased to prevent unwanted movement during input. When no touch input is detected, the stiffness is reduced to allow easy maneuverability. This dynamic adjustment resolves the contradiction between ease of operation and input accuracy.
Solution Approach 2:
The system uses feedback from the touch pattern estimating unit to detect whether a touch input is being performed. Based on this feedback, the arm control unit adjusts the stiffness parameter in real-time. This feedback mechanism enables the system to respond appropriately to user actions, maintaining both maneuverability and input accuracy.
2Ease of operation
If the user touches the touch panel display to input commands, then the input operation is enabled, but the display position changes unintentionally along the touch direction
Solution Approach 1:
The arm stiffness is dynamically adjusted based on the detected touch pattern. When a touch input is detected, the stiffness is increased to prevent unwanted movement during input. When no touch input is detected, the stiffness is reduced to allow easy maneuverability. This dynamic adjustment resolves the contradiction between ease of operation and input accuracy.
Solution Approach 2:
The stiffness parameter is adjusted specifically in the direction of the detected touch pattern. This localized adjustment ensures that the arm resists movement only in the direction where input is being performed, while maintaining maneuverability in other directions. This resolves the contradiction by applying different stiffness characteristics to different operational contexts.
3Manufacturing precision
If the arm stiffness is increased to prevent display movement during touch, then the position stability is improved, but the ease of moving the display is reduced
Solution Approach 1:
The arm stiffness is made dynamically adjustable based on the detected touch pattern. When a touch input is detected, the stiffness is increased to prevent unwanted movement during input. When no touch input is detected, the stiffness is reduced to allow easy maneuverability. This dynamic adjustment resolves the contradiction between ease of operation and input accuracy.
Solution Approach 2:
The system periodically detects touch patterns and adjusts stiffness accordingly, creating a rhythmic cycle of stiffness adjustment that adapts to the user's interaction. This periodic adjustment ensures that the arm provides appropriate resistance only when needed, maintaining both maneuverability and position stability.
Data Source
AI summary
There is provided a display information acquiring unit for acquiring display information on a screen of a touch panel display, a touch pattern estimating unit for estimating a region on the screen likely to be touched by a person and a motion direction of the touch based on the display information, a load estimating unit for estimating a load or a torque to the display based on the estimated region and the motion direction, a stiffness parameter information generating unit for generating information for controlling the arm so that the position and the orientation of the display do not change along the touching direction at the time of touch panel input based on the estimated load or torque, and an arm control unit for controlling a stiffness parameter of the arm based on the generated information.