Virtual Keyboard Projection System for Typing Accuracy
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Solution Overview
Problem
Conventional human-machine interaction methods, such as remote controllers, have become inconvenient as more interactive ways become popular, necessitating a more efficient and versatile interface for typing.
Innovation Solution
A virtual keyboard system that projects a key area onto a projection plane, utilizing a projector, storage device for a key value mapping table, and devices for obtaining typed position coordinates and corresponding key values, allowing for real-time typing without physical keys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a remote controller is used for human-machine interaction, then the interaction can be realized, but the convenience and efficiency deteriorate as more interactive ways become popular
Solution Approach 1:
The patent creates a virtual keyboard by projecting an image of a keyboard onto a surface, copying the visual appearance and functional layout of a physical keyboard without requiring physical keys. Users interact with the projected virtual keys through touch or gesture, combining the visual familiarity of a keyboard with the flexibility of projection-based interaction.
Solution Approach 2:
The patent replaces the mechanical structure of a physical keyboard with a projection-based system. Instead of physical keys that require mechanical actuation, the system uses a projected image that responds to touch or gesture inputs, eliminating mechanical components while maintaining keyboard functionality.
2Adaptability or versatility
If a virtual keyboard is projected, then the flexibility and adaptability improve, but the measurement precision of typed position may deteriorate
Solution Approach 1:
The system continuously captures images of the projection surface, detects the position of typed inputs, and provides visual feedback by displaying the detected key values. This real-time feedback loop allows the system to monitor and correct position detection accuracy, ensuring precise recognition of user inputs while maintaining the flexibility of the virtual keyboard interface.
Solution Approach 2:
The patent replaces mechanical position detection with optical image processing. Instead of using mechanical switches or sensors under physical keys, the system uses an imaging device to capture the projection surface and algorithmically determine key press positions, enabling precise detection without physical contact points.
3Adaptability or versatility
If image processing is used to obtain typed position coordinates, then the versatility improves, but the device complexity increases
Solution Approach 1:
The system uses the existing projection surface and ambient lighting conditions to capture images, rather than requiring separate illumination devices or specialized sensors. The imaging device leverages the projected keyboard image itself as the reference frame, allowing the system to self-calibrate and detect key positions without additional complex hardware or calibration procedures.
Data Source
AI summary
A virtual keyboard system and typing method are provided. The virtual keyboard system includes a projector configured for projecting a key area having keys onto a projection plane, a storage device configured for storing a key value mapping table, a typed position coordinate obtaining device configured for obtaining coordinates of a typed position of the key area, and a key value obtaining device configured for obtaining key values corresponding to the coordinates of the typed position from the key value mapping table. The key values are outputted when a projected virtual key area is touched by a user.