Input Control Unit Stylus Angle Distance Detection
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Solution Overview
Problem
Digital devices that allow both human body and stylus input often incorrectly detect palm input during stylus operations, leading to unintended touch detection and reduced usability due to the limitations of existing palm rejection functions.
Innovation Solution
An information processing device and method that control input switching based on the separation distance and angle between the human body or stylus-like input device and the operation input surface, improving the accuracy of input mode detection and user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hover distance for palm rejection is increased to prevent unintended touch input, then palm rejection capability is improved, but intended touch input accuracy deteriorates
Solution Approach 1:
The patent introduces a new dimension of discrimination by detecting the angle between the stylus device and the touch panel surface. Instead of relying solely on vertical distance (hover distance), the system combines angular information to distinguish between palm contacts and stylus tips, enabling accurate input recognition even at larger hover distances.
Solution Approach 2:
The system changes the detection parameters from a single distance metric to a combination of distance and angle parameters. By monitoring both the hover distance and the angle between the stylus and the panel, the system achieves more precise differentiation between intended stylus input and unintended palm contact.
2Device complexity
If a simple distance-based palm rejection method is used, then device complexity is reduced, but input operation accuracy deteriorates
Solution Approach 1:
The patent makes the detection system multi-functional by using the same sensor array to detect both distance and angle information. This allows a single detection mechanism to serve multiple purposes: determining hover distance, calculating stylus angle, and differentiating between input modes, thereby avoiding the need for separate complex detection systems.
Solution Approach 2:
The system enhances its detection capability by adding angular dimension to the existing distance-based detection. This dimensional expansion allows the system to maintain simplicity while achieving higher accuracy through the combined use of distance and angle parameters.
Data Source
AI summary
An information processing device, including: an operation input unit that allows input operations by two types of operating bodies, including an input operation performed via proximity or contact of a part of a human body, and an input operation performed via proximity or contact of a stylus-like input device; and an input control unit that controls switching between the input operation performed via proximity or contact of the part of the human body and the input operation performed via proximity or contact of the stylus-like input device, based on a separation distance between the part of the human body and/or the stylus-like input device and an operation input surface of the operation input unit, and also based on an angle between a central axis of the stylus-like input device and the operation input surface.