Wearable Input Device for Head-Mounted Display Character Selection
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Solution Overview
Problem
Current head-mounted display systems require advanced detection functions to interpret finger movements for input, leading to a heavy processing load, which is undesirable for lightweight and efficient operation.
Innovation Solution
A display system with a head-mounted display device and a wearable input device on the arm or leg, using movement detection units to simplify input processing by detecting circumferential movements, reducing the processing load on the head-mounted device and enabling intuitive character input through a wristband-type wearable device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If advanced detection function using image recognition is used to detect finger movement, then input detection capability is improved, but processing load on head-mounted display device increases
Solution Approach 1:
The patent introduces an intermediary device (wristband-type input device with movement detection unit) that performs the complex detection task away from the head-mounted display. The wristband detects wrist movement and communicates input information to the head-mounted display, allowing the HMD to process only simple reception tasks rather than complex image recognition
Solution Approach 2:
The patent replaces the mechanical/image-based detection system (camera-based image recognition requiring heavy processing) with a sensor-based detection system (acceleration sensor detecting physical wrist movement). This substitution uses simpler mechanical sensing that requires minimal processing power while maintaining input detection capability
2Device complexity
If movement detection unit is provided on input device, then processing load on head-mounted display device is reduced, but detection accuracy may be affected
Solution Approach 1:
The wristband acts as an intermediary that performs accurate local detection of wrist movement using acceleration sensors, then communicates processed input information to the head-mounted display. This allows the HMD to receive pre-processed, accurate input data without performing complex detection itself
Solution Approach 2:
The patent changes the detection parameter from complex image recognition data to simple acceleration sensor data. By detecting physical movement parameters (acceleration, direction, magnitude) directly at the wrist, the system achieves both reduced processing load and maintained accuracy through appropriate parameter selection
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
This configuration reduces the processing load on the head-mounted display device, allows for accurate and intuitive operation, and enhances user convenience and operability by using acceleration sensors and a miniaturized input device for character input.
Implementation Method 1
the movement detection unit may have an acceleration sensor with two or more axes, and a processing device which detects the movement from a detection signal of the acceleration sensor
Data Source
AI summary
A display system includes a display device, and an input device. The input device operates the display device, having a movement detection unit that include a sensor which detects a first movement that is circumferential around an axis and a second movement that is perpendicular the axis. The display device includes a first area in which characters are arranged and second area in which character string is displayed. A character that configures of the character string is selected from the first area according to the first movement and the second movement.