Three dimensional wireless pointing device

• US 5,867,146 A
• Filed: 01/10/1997
• Issued: 02/02/1999
• Est. Priority Date: 01/17/1996
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Jeong Yeol, Chwa, Duk Chin
• Primary Examiner(s): Wu, Daniel J.
• Application Number:
  US08/781,321
• Time in Patent Office: 753 Days
• Field of Search: 345/158, 345/163, 345/157, 345/156, 345/161, 345/168, 345/169, 341/20, 341/22, 356/141.5, 367/907, 367/129
• US Class Current: 345/158
• 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
• CPC Class Codes: Y10S 367/907 Coordinate determination

Abstract

Three dimensional wireless pointing device for calculating coordinates and controlling a position of a cursor in a three dimensional space is disclosed, including a transmission side having a plurality of ultrasonic wave generating parts and a single infrared ray emitting part or a single ultrasonic wave generating part and a plurality of infrared ray emitting parts arranged in a certain axis direction at certain angles and a reception side having a plurality of infrared ray receiving sensors and a single ultrasonic wave receiving sensor arranged to cross the ultrasonic wave generating part(s) and the infrared ray emitting part(s) in the transmission side at a right angle, thereby to measure intensities of the infrared ray(s) and the ultrasonic wave(s) varied depending on direction of pointing and calculate a difference of relative traveling time periods of the infrared ray and the ultrasonic wave to obtain coordinate values of a position in a three dimensional space, whereby a position of cursor or menu, which is a control objective, can be controlled using the obtained coordinate values.

Claims

1. A three dimensional wireless pointing device comprising:

position pointing means having an infrared ray emitting part and a plurality of ultrasonic wave generating parts arranged in a predetermined axis direction at predetermined angles for emitting an infrared ray and generating a plurality of ultrasonic waves of different characteristics into a space;

detecting means having an ultrasonic wave receiving sensor and a plurality of infrared ray receiving sensors mounted on different positions on a straight line on a body of an electronic appliance to cross at a right angle to the infrared ray emitting part and the plurality of ultrasonic wave generating parts on the position pointing means for receiving the ultrasonic waves and the infrared signal transmitted from the position pointing means;

spatial position analyzing means for digitizing a plurality of infrared signals detected in the detecting means and detecting a relative phase difference of the ultrasonic waves with reference to a time when the infrared rays are detected;

coordinate calculating means for measuring intensities of the plurality of detected infrared rays digitized in the spatial position analyzing means in obtaining a first coordinate value, measuring intensities of the plurality of ultrasonic waves of different characteristics received at the ultrasonic wave receiving sensor with reference to the time when the infrared rays are detected by the infrared ray receiving sensors in obtaining a second coordinate value, and calculating an average traveling time of the ultrasonic waves with reference to the time when the infrared rays are detected by the infrared ray receiving sensors in obtaining a third coordinate value, thereby to determine a three dimensional relative position between the position pointing means and the detecting means; and

,

a position controlling means for taking the three dimensional position determined by the coordinate calculating means as the present position caused by a position movement of the position pointing means relative to the detecting means.

2. A device as claimed in claim 1, wherein the position pointing means includes,

a key applying part having keys for moving a cursor, selection orders and operation orders,

a periodic pulse generating part for receiving a key signal from the key applying part in generation of periodic pulses of a code identifying waveform and a synchronization identifying waveform,

a signal producing part for overlapping the periodic pulse signal generated in the periodic pulse generating part with infrared, and ultrasonic carrier signals to convert into an infrared ray and a plurality of ultrasonic wave signals of different characteristics,

a carrier generating part for generating an ultrasonic carrier signal and an infrared carrier signal and applying to the signal producing part during transmission of the ultrasonic waves and the infrared ray, and

a plurality of signal generating parts having ultrasonic wave generating parts and an infrared ray emitting part for transmitting the ultrasonic wave signals of different characteristics and the infrared signal from the signal producing part into a space.

3. A device as claimed in claim 1, wherein the detecting means includes,

the plurality of infrared ray receiving sensors mounted on different positions on a straight line each for receiving the infrared ray transmitted from the position pointing means,

the ultrasonic wave receiving sensor mounted on a position different from the positions of the infrared ray receiving sensors on the same straight line for receiving the ultrasonic wave signals transmitted from the position pointing means,

amplifying and filtering parts connected to the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors respectively for amplifying the weak ultrasonic wave signal and the plurality of infrared signals received at the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors respectively and passing carrier frequency bands only, and

envelope detectors for removing carrier signals from outputs of the amplifying and filtering parts to detect intensity levels of the signals received at the ultrasonic wave receiving sensor and the infrared ray receiving sensors, respectively.

4. A device as claimed in claim 1, wherein the spatial position analyzing means includes,

an analog-to-digital converter for digitizing outputs from the envelope detectors, each of which envelope detectors detects an envelope of one of the infrared ray signals received at the plurality of infrared ray receiving sensors,

a first comparator for comparing an output of a predetermined envelope detector which detects the envelope of the infrared ray signal with an internal reference signal to convert into a timing signal for using the timing signal as a reference signal in coordinate calculation and code analyzing,

a second comparator for comparing an output from the envelope detector which detects the envelope of the ultrasonic wave signal with an internal reference signal to convert into a timing signal,

a phase difference detector for detecting a relative phase difference of the ultrasonic wave signal from the second comparator with reference to a time when the infrared ray from the first comparator is detected, and

a clock generator for generating and applying clocks to the phase difference detector.

5. A device as claimed in claim 1, wherein the infrared ray emitting part and the plurality of ultrasonic wave generating parts in the position pointing means are arranged in an Y-axis direction at predetermined angles, and the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors in the detecting means are mounted on a body of an electronic appliance in an X-axis direction spaced predetermined distances apart to cross the infrared ray emitting part and the plurality of ultrasonic wave generating parts in the position pointing means at a right angle.

6. A device as claimed in claim 1, wherein the ultrasonic wave generating part and the plurality of infrared ray emitting parts in the position pointing means are arranged in an X-axis direction at predetermined angles, and the infrared ray receiving sensor and the plurality of ultrasonic wave receiving sensors in the detecting means are mounted on the body of an electronic appliance in an Y-axis direction spaced predetermined distances apart to cross the ultrasonic wave generating part and the plurality of infrared ray emitting parts in the position pointing means at a right angle.

7. A device as claimed in claim 1, wherein the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors in the detecting means are arranged in a system which can be detachable from the body of an electronic appliance.

8. A device as claimed in claim 1, wherein the position pointing means transmits ultrasonic waves of carrier frequencies different from one another on the same time.

9. A device as claimed in claim 1, wherein the position pointing means transmits ultrasonic waves of the same carrier frequency at timings different from one another.

10. A three dimensional wireless pointing device comprising:

position pointing means having an ultrasonic wave generating part and a plurality of infrared ray emitting parts arranged in a predetermined axis direction at predetermined angle for generating an ultrasonic wave signal and emitting a plurality of infrared ray signals of different characteristics into a space;

detecting means having an ultrasonic wave receiving sensor and a plurality of infrared ray receiving sensors mounted on a body of an electronic appliance at different positions on a straight line to cross at a right angle to the ultrasonic wave generating part and the plurality of infrared ray emitting parts in the position pointing means for receiving the ultrasonic wave signal and the infrared ray signals transmitted from the position pointing means;

spatial position analyzing means for digitizing the plurality of infrared signals detected in the detecting means and detecting a phase of the ultrasonic wave signal with reference to a time when the infrared rays are detected;

coordinate calculating means for measuring detected intensities of the plurality of infrared rays digitized in the spatial position analyzing means in obtaining a first coordinate value, measuring detected intensities of the plurality of infrared signals of different characteristics received at one of the plurality of infrared ray receiving sensors in obtaining a second coordinate value, and calculating an average traveling time of the ultrasonic waves with reference to the time when the infrared rays are detected by the infrared ray receiving sensors in obtaining a third coordinate value, thereby to determine a three dimensional relative position between the position pointing means and the detecting means; and

,

a position controlling means for taking the three dimensional position determined by the coordinate calculating means as the present position caused by a position movement of the position pointing means relative to the detecting means.

11. A device as claimed in claim 10, wherein the position pointing means includes,

a key applying part having keys for moving a cursor, selection orders and operation orders,

a periodic pulse generating part for receiving a key signal from the key applying part in generation of periodic pulses of a code identifying waveform and a synchronization identifying waveform,

a signal producing part for overlapping the periodic pulse signal generated in the periodic pulse generating part with ultrasonic, and infrared carrier signals to convert into an ultrasonic wave signal and a plurality of infrared ray signals of different characteristics,

a carrier generating part for generating an ultrasonic carrier signal and an infrared carrier signal and applying to the signal producing part during transmission of the ultrasonic wave signal and the infrared ray signals, and

a signal generating part having the ultrasonic wave generating part and the plurality of infrared ray emitting parts for transmitting the ultrasonic wave signal and the plurality of infrared ray signals of different characteristics from the signal producing part into a space.

12. A device as claimed in claim 10, wherein the detecting means includes,

the plurality of infrared ray receiving sensors mounted on different positions on a straight line each for receiving the infrared ray transmitted from the position pointing means,

the ultrasonic wave receiving sensor mounted on a position different from the positions of the infrared ray receiving sensors on the same straight line for receiving the ultrasonic wave signals transmitted from the position pointing means,

amplifying and filtering parts connected to the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors respectively for amplifying the weak ultrasonic wave signal and the plurality of infrared signals received at the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors respectively and passing carrier frequency bands only, and

envelope detectors for removing carrier signals from outputs of the amplifying and filtering parts to detect intensity levels of the signals received at the ultrasonic wave receiving sensor and the infrared ray receiving sensors, respectively.

13. A device as claimed in claim 10, wherein the spatial position analyzing means includes,

an analog-to-digital converter for digitizing outputs from the envelope detectors, each of which envelope detecters detects an envelope of one of the infrared ray signals received at the plurality of infrared ray receiving sensors,

a first comparator for comparing an output of a predetermined envelope detector which detects the envelope of the infrared ray signal with an internal reference signal to convert into a timing signal for using the timing signal as a reference signal in coordinate calculation and code analyzing,

a second comparator for comparing an output from the envelope detector which detects the envelope of the ultrasonic wave signal with an internal reference signal to convert into a timing signal,

a phase difference detector for detecting a relative phase difference of the ultrasonic wave signal from the second comparator with reference to a time when the infrared ray from the first comparator is detected, and

a clock generator for generating and applying clocks to the phase difference detector.

14. A device as claimed in claim 10, wherein the coordinate calculating means measures intensifies of infrared ray signals detected by the plurality of infrared ray receiving sensors of the infrared ray signal transmitted through one of the infrared ray emitting parts in the position pointing means to calculate a first coordinate value and, after a predetermined time interval, measures intensities of infrared ray signals detected by the plurality of infrared ray receiving sensors of the infrared ray signal transmitted through the other one of the infrared ray emitting parts in the position pointing means to calculate another first coordinate value, and averaging the calculated first coordinate values to calculate a final first coordinate value.

15. A device as claimed in claim 14, wherein the first coordinate value is an X-axis coordinate value.

16. A device as claimed in claim 10, wherein the ultrasonic wave generating part and the plurality of infrared ray emitting parts in the position pointing means are arranged in an Y-axis direction at predetermined angles, and the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors in the detecting means are mounted on a body of an electronic appliance in an X-axis direction spaced predetermined distances apart to cross the ultrasonic wave generating part and the plurality of infrared ray emitting parts in the position pointing means at a right angle.

17. A device as claimed in claim 10, wherein the ultrasonic wave generating part and the plurality of infrared ray emitting parts in the position pointing means are arranged in an X-axis direction at predetermined angles, and the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors in the detecting means are mounted on the body of an electronic appliance in an Y-axis direction spaced predetermined distances apart to cross the ultrasonic wave generating part and the plurality of infrared ray emitting parts in the position pointing means at a right angle.

18. A device as claimed in claim 10, wherein the ultrasonic wave receiving sensor and the plurality of infrared ray receiving sensors in the detecting means are arranged in a system which can be detachable from the body of an electronic appliance.

19. A device as claimed in claim 10, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another and emit infrared rays of carrier frequencies different from one another on the same time.

20. A device as claimed in claim 10, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another and emit infrared rays of a same carrier frequency at timings different from one another.

21. A device as claimed in claim 10, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another, one of which emits a longitudinal infrared ray and the other one of which transmits a transverse infrared ray, separately.

22. A device as claimed in claim 10, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another, and emit infrared rays of wavelengths different from one another.