Capacitive Gesture Input for Compact Mobile Devices
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Solution Overview
Problem
Compact mobile devices like smartphones and digital cameras require fine motor coordination for input operations, which can be challenging for users with limited dexterity or in situations where attention is divided.
Innovation Solution
A mobile communication device with a control system that processes input events through hand movements, allowing for two-dimensional navigation and gesture recognition, using field-electrical detection and conversion of hand gestures into sound-like sequences for easy operation, incorporating speech recognition for enhanced usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional keypads and input buttons are used in compact mobile devices, then the device structure is simple and manufacturing is easy, but the input operations require considerable fine motor coordination which is difficult for certain users
Solution Approach 1:
The patent replaces traditional mechanical keypads and buttons with a capacitive touch-sensitive display that detects hand movements and gestures through electrical field changes. This substitution eliminates the need for physical contact and fine motor coordination, allowing users to operate the device with coarse motor movements of the entire hand or arm, thereby improving ease of operation while maintaining a compact form factor.
Solution Approach 2:
The patent introduces a virtual input area that extends beyond the physical display boundaries, allowing hand movements to be detected in a larger three-dimensional space. This dimensional extension enables users to perform input operations with larger, more manageable movements rather than confined to the small display area, resolving the contradiction between compact device size and ease of input operation.
2Ease of operation
If the operational area is extended beyond the display boundaries, then coarse motor movements can be processed more easily, but the device size and complexity increase
Solution Approach 1:
The patent creates a virtual copy of the input interface that exists in the electrical field surrounding the device rather than requiring physical expansion of the device itself. The capacitive sensors detect hand movements in this virtual space, allowing the operational area to extend beyond physical boundaries without increasing the actual device dimensions, thus maintaining compactness while enabling coarse motor control.
Solution Approach 2:
The patent uses an invisible capacitive field layer that extends beyond the physical device boundaries, analogous to a flexible membrane that can be disturbed by hand movements in a larger volume. This field-based approach allows the operational area to be larger than the physical device without adding bulk or complexity to the device structure.
3Ease of operation
If field-electrical detection is used for gesture recognition, then contactless input operations are enabled, but the detection precision and accuracy may be reduced
Solution Approach 1:
The patent combines multiple capacitive sensors arranged in an array to detect hand movements. By merging the signals from multiple sensors and using signal processing algorithms, the system achieves sufficient detection precision for gesture recognition while maintaining contactless operation. The combined data from multiple detection points compensates for the lower precision of individual field-electrical measurements.
Solution Approach 2:
The patent implements feedback mechanisms where the detected hand movements are immediately reflected in the user interface through visual feedback on the display. This feedback loop helps users adjust their gestures to achieve the desired input, effectively compensating for any detection imprecision and improving overall input accuracy while maintaining contactless operation.
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
Enables intuitive and efficient input operations on compact devices using coarse motor movements, allowing users to interact with virtual interfaces without contact, providing acoustic and optical feedback, and enabling gesture recognition through existing speech recognition systems.
Implementation Method 1
The sensor device (21) is designed in such a way that it detects the position and/or movement of an operating hand (R) in a detection area (E) enabled in front of the mobile communication device (1) using field-electrical interaction effects
Implementation Method 2
it is possible to integrate the user's body as such into the signal transmission system, for example by injecting a displacement current event into the user through the back of the communication device, which is brought about by appropriate modulation of the voltage at electrodes provided in the rear area of the device
Data Source
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AI summary
The invention relates to a mobile communication device and an input device provided for operating said communication device by means of which input operations necessary for using the communication device may be carried out. The aim of the invention is to provide solutions by means of which it is possible, in particular for relatively compact mobile electronic devices, in particular communication devices and digital cameras to carry out said input operations in a manner which is particularly easy to coordinate for the user. According to a first aspect of the invention, the above is achieved by means of a mobile communication device with a housing arrangement which is designed to be held in one hand, a display device, included in the housing arrangement to provide an image reproduction surface, a control device for controlling the display device such that in an input mode the above provides an input graphic, which supports the carrying out of an input process and an input device for carrying out the input process according to input processes of a manual type, wherein said device is characterised in that the input device is designed such that an input zone is provided in a region apart from the display device on an operative manipulation of the device, within which input operations can be carried out by a user, wherein the user carries out control actions with his free hand with relation to the housing device without, in the process, touching the display device or the commmunication device with this hand.