METHOD AND DEVICE FOR INPUTTING A USER'S INSTRUCTIONS BASED ON MOVEMENT SENSING

• US 20100123660A1
• Filed: 10/23/2009
• Published: 05/20/2010
• Est. Priority Date: 11/14/2008
• Status: Abandoned Application

• Current Assignee: Microinfinity, Inc.
• Original Assignee: Microinfinity, Inc.
• Inventors: LEE, JUNG-HWAN, KIM, SANG-BUM, PARK, WON-JANG, SAKONG, BYUNG-CHUN, YANG, WOO-HEE, PARK, KYU-CHEOL
• Application Number:
  US12/604,780
• Publication Number:
  US 20100123660A1
• Time in Patent Office: Days
• US Class Current: 345/157
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors

Abstract

Provided is a user instruction input device operating in a three-dimensional space. The user instruction input device includes a first sensor that senses the angular rate of the device centering on at least one axis, a second sensor that senses the acceleration of the device at least for one direction, and a processing unit that calculates a first rotation angle in a coordinate system independent of the attitude of the first device from the output value of the first sensor, calculates a second rotation angle in the coordinate system from the output value of the second sensor, and calculates the final attitude angle by combining the first rotation angle and the second rotation angle.

Claims

1. A user instruction input device operating in a three-dimensional space, the device comprising:

a first sensor that senses the angular rate of the device centering on at least one axis;

a second sensor that senses the acceleration of the device at least for one direction; and

a processing unit that calculates a first rotation angle in a coordinate system independent of the attitude of the first device from the output value of the first sensor, calculates a second rotation angle in the coordinate system from the output value of the second sensor, and calculates the final attitude angle by combining the first rotation angle and the second rotation angle.

2. The device of claim 1, wherein the first sensor is an angular rate sensor that senses rotation of the device on the first axis and rotation of the device on the second axis perpendicular to the first axis.

3. The device of claim 1, wherein the calculated first rotation angle and the calculated second rotation angle are combined by the weighted average.

4. The device of claim 3, wherein the weight is estimated by a predetermined movement estimation function, the movement estimation function sets the weight to reflect only the second rotation angle to the final attitude angle if there is no movement in the device, the function sets the weight to reflect only the first rotation angle if the movement of the device is at the maximum level, and the function sets the weight to between the value at no movement and the value at the maximum movement if the movement of the device is between no movement and the maximum movement.

5. The device of claim 1, wherein the first rotation angle is calculated from a differential equation of the combination of the output of the first sensor and the first rotation angle

6. The device of claim 1, wherein the yaw of the second rotation angle is calculated from the combination of the roll and the pitch of the second rotation angle.

7. The device of claim 1, wherein the final attitude angle includes at least a yaw and a pitch.

8. The device of claim 7, wherein the variation of the yaw corresponds to the horizontal variation of the pointer on the display, and the variation of the pitch corresponds to the vertical variation of the pointer on the display.

9. The device of claim 8, wherein the variation of the yaw and the horizontal variation, and the variation of the pitch and the y-axis variation are mapped by a predetermined mapping function.

10. The device of claim 9, wherein the mapping function includes at least two of three areas, which are a mapping depression area that outputs by reducing or removing the input value of the function, a scaling area that maps the input value of the function to a roughly proportional output value, and a limitation area that limits the output value for the input value more than a certain value.

11. A method of inputting a user instruction using a user instruction input device operating in a three-dimensional space, the method comprising:

sensing the angular rate of the device on at least one axis;

sensing the acceleration of the device for at least one direction;

calculating a first rotation angle in a coordinate system independent of the attitude of the device using the output value of the first sensor;

calculating a second rotation angle in the coordinate system using the output value of the second sensor;

calculating the final attitude angle by combining the first rotation angle and the second rotation angle; and

outputting a position variation corresponding to the variation of the calculated final attitude angle.

12. A user instruction input device operating in a three-dimensional space, the device comprising:

a first sensor that senses the angular rate of the device on at least one axis;

a second sensor that senses the rotation angle of the device; and

a processing unit that calculates the rotation angle in a coordinate system independent of the attitude of the device using the output value of the first sensor, and calculates the final attitude angle by combining the sensed rotation angle and the calculated rotation angle.