Wearable Display Virtual Keyboard Input System
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Solution Overview
Problem
Existing display systems face challenges in balancing operability and mobility, as hardware keyboards are cumbersome for mobility but touch panels and dedicated keys are inadequate for operability.
Innovation Solution
A display system that includes a sensor unit to detect the position of a pointing object, a control apparatus to set and recognize key layouts, and a wearable display apparatus that allows operational input without a dedicated input device, using image pickup and projection systems to overlay key images on optical images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a hardware keyboard is used as an input device, then operability is improved, but mobility deteriorates due to increased size and weight
Solution Approach 1:
The patent creates a virtual copy of a keyboard on a wearable display device, allowing the user to see and interact with key images projected onto the display without carrying a physical keyboard. The sensor unit detects the user's finger position, and the control apparatus maps this to virtual key positions, enabling keyboard input functionality while maintaining device portability.
Solution Approach 2:
The patent replaces the mechanical keyboard system with an optical detection system. Instead of physical key switches, the sensor unit detects finger position through optical or capacitive sensing, and the control apparatus processes this information to determine key presses, substituting mechanical interaction with electronic detection and processing.
2Weight of moving object
If a touch panel or dedicated keys are used in a mobile terminal, then mobility is improved, but operability deteriorates due to limited input capability
Solution Approach 1:
The wearable display device serves multiple functions: it displays information, detects finger position through the sensor unit, and processes input through the control apparatus. This multi-functional design eliminates the need for separate dedicated input devices while maintaining mobility, as the display device itself becomes the input interface.
Solution Approach 2:
The patent introduces an intermediary detection system between the user's finger and the input processing. The sensor unit acts as an intermediary that detects finger position, and the control apparatus serves as another intermediary that translates this position into key press recognition, enabling sophisticated input capability without physical keys.
3Area of stationary object
If the input device is made larger to improve operability, then ease of operation is improved, but device size increases reducing mobility
Solution Approach 1:
The patent transitions the keyboard interface from a two-dimensional physical surface to a virtual overlay on the wearable display. The key images are projected onto the display area, and finger position detection occurs in the spatial dimension of the user's hand movement, allowing a full-sized keyboard interface without increasing the physical device volume.
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 operability and mobility by allowing users to input data using a pointing object on a wearable display system without a dedicated input device, maintaining clear visibility and ease of use.
Implementation Method 1
the sensor unit projects at least one of an infrared light flux and an ultrasonic wave and detects the position of the pointing object based on reflection from the pointing object
Implementation Method 2
the image pickup area transmits externally incident light
Implementation Method 3
the display apparatus superimposes a key image showing the key layout contained in the predetermined image light on an optical image of the object having passed through the image pickup area based on the position of the display apparatus relative to the object
Data Source
AI summary
A display system includes a sensor unit that detects the position of a pointing object in contact with a predetermined object, a control apparatus that sets a key layout on the object and recognizes a key operated by the pointing object based on the position of the pointing object relative to the key layout, and a display apparatus that receives operational input from the operated key.