Input Apparatus Motion Vector Correction Using Inertia Sensors
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Solution Overview
Problem
Existing input apparatuses for display systems, such as remote controllers, face limitations in accurately transmitting motion information due to reliance on four-direction key manipulation or inertia sensors, which can be inconvenient and prone to errors.
Innovation Solution
An input apparatus equipped with a communication unit, a sensing unit to detect acceleration and angular speed, a storage unit for position information, and a controller that calculates and transmits motion information based on detected angular speed and position, determining movement by comparing acceleration with gravitational acceleration, and updating position information when stationary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If four-direction key manipulation is used to generate motion information, then the input apparatus can transmit motion information to the display apparatus, but the manipulation becomes inconvenient and the accuracy of motion information is reduced
Solution Approach 1:
The patent replaces the mechanical four-direction key manipulation system with an inertia sensor-based detection system. The inertia sensor automatically detects the motion vector of the input apparatus through wireless communication, eliminating the need for manual key pressing while providing accurate motion information to the display apparatus for cursor movement control.
2Productivity
If inertia sensor is applied to detect motions of the input apparatus, then the motion vector can be detected and transmitted wirelessly, but the accuracy of motion information is still insufficient
Solution Approach 1:
The patent applies preliminary action by pre-storing position information in a storage unit before motion occurs. When motion is detected by the inertia sensor, the controller calculates the motion vector based on both the detected angular speed and the pre-stored position information, thereby improving the accuracy of motion information transmission to the display apparatus.
Solution Approach 2:
The patent implements feedback by continuously updating position information based on detected acceleration when the input apparatus is stationary, and using this updated position information to calculate motion vectors during motion. This feedback mechanism ensures that the motion information transmitted to the display apparatus accurately reflects the actual position and movement of the input apparatus.
3Measurement precision
If motion information is calculated based on angular speed and position information, then the accuracy of motion information is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the controller to perform multiple functions: detecting motion state, calculating motion vectors based on angular speed and position information, updating position information based on acceleration, and transmitting corrected motion information. This multi-functional approach improves motion information accuracy without requiring separate dedicated components for each function, thereby managing device complexity.
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 solution enhances the accuracy of motion information transmission, reducing operational loads and improving user convenience by accurately determining movement and correcting motion vectors in a triaxial coordinate system.
Implementation Method 1
an inertia sensor to detect motions of the input apparatus may be applied to the input apparatus. In this case, when a user moves/rotates the input apparatus, holding the input apparatus, a motion vector of the input apparatus is detected and calculated by the inertia sensor.
Data Source
AI summary
An input apparatus of a display apparatus, a display system, and a control method thereof, are provided herein, the input apparatus including: a communication unit which communicates with the display apparatus; a sensing unit which detects angular speed and acceleration from a motion of the input apparatus; a storage unit which stores position information on a position of the input apparatus; and a controller which calculates the motion information based on the detected angular speed and the position information and transmits the calculated motion information through the communication unit if the input apparatus moves, and updates the position information in the storage unit based on the detected acceleration if the input apparatus does not move.