Three dimensional wireless pointing device

• US 5,892,501 A
• Filed: 01/08/1997
• Issued: 04/06/1999
• 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): Mullen, Thomas
• Assistant Examiner(s): TWEEL JR, JOHN ALEXANDER
• Application Number:
  US08/781,171
• Time in Patent Office: 818 Days
• Field of Search: 345/158, 345/166, 345/181, 356/141.5, 356/141.3
• 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

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 arrival times 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 ultrasonic wave generating part and a plurality of infrared ray emitting parts arranged in a predetermined axis direction at predetermined angles for generating an ultrasonic wave signal and emitting a plurality of infrared ray signals of different characteristics into a space;

detecting means having a plurality of ultrasonic wave receiving sensors and an infrared ray receiving sensor mounted on different positions on a straight line on a body of an electronic appliance to cross at a right angle to the ultrasonic wave generating part and the plurality infrared ray emitting parts on 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 converting the infrared signal detected in the detecting means into a digital signal and a timing signal, comparing the ultrasonic wave signals detected in the detecting means with a reference signal to convert into timing signals, and detecting a phase difference of each of the ultrasonic wave signals with reference to a time when the infrared ray is detected;

coordinate calculating means for calculating a detection time difference of each of the ultrasonic waves detected at the plurality of ultrasonic wave receiving sensors with reference to a detection time of the infrared signal converted into the timing signal in the spatial position analyzing means to obtain a first coordinate value, measuring detected intensities of the plurality of infrared ray signals of different characteristics received from the infrared ray emitting parts and converted into the digital signal in the spatial position analyzing means to obtain a second coordinate value, and calculating an average arrival time of the ultrasonic waves with reference to the time when the infrared rays are detected at the infrared ray receiving sensor to obtain 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 commands and operation commands,

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 the ultrasonic wave signal and the plurality of infrared ray signals of different characteristics,

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

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

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

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

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

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

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

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

a first comparator for comparing an envelope waveform of the ultrasonic wave signal received at one of the ultrasonic wave receiving sensors with an internal reference signal to convert into a timing signal,

a second comparator for comparing an envelope waveform of the ultrasonic wave signal received at a second of the ultrasonic wave receiving sensors with an internal reference signal to convert into a timing signal,

a third comparator for comparing an envelope waveform of the ultrasonic wave signal received at a third of the ultrasonic wave receiving sensors with an internal reference signal to convert into a timing signal,

an analog-to-digital converter for digitizing an envelope waveform of the infrared ray signal received at the infrared ray receiving sensor,

a fourth comparator for comparing an envelope waveform of the infrared ray signal received at the infrared ray receiving sensor with an internal reference signal to convert into a timing signal for using as a reference signal in calculation of coordinates and code analysis,

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

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

5. 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 a Y-axis direction at predetermined angles, and the plurality of ultrasonic wave receiving sensors and the infrared ray receiving sensor in the detecting means are mounted on the body of the 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.

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 plurality of ultrasonic wave receiving sensors and the infrared ray receiving sensor in the detecting means are mounted on the body of the electronic appliance in a 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 sensors and the infrared ray receiving sensor in the detecting means are arranged in a system which can be detachable from the body of the electronic appliance.

8. A device as claimed in claim 1, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another and transmit infrared rays of carrier frequencies different from one another on the same time.

9. A device as claimed in claim 1, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another and transmit infrared rays of the same carrier frequency at timings different from one another.

10. A device as claimed in claim 1, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another, and one of the infrared ray emitting parts transmits a longitudinal wave and the other one of the infrared ray emitting parts transmits a transverse wave.

11. A device as claimed in claim 1, wherein the plurality of infrared ray emitting parts in the position pointing means are arranged at positions different from one another, and transmit infrared rays of wavelengths different from one another.

12. A three dimensional wireless pointing device comprising:

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

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

spatial position analyzing means for converting the infrared signal detected in the detecting means into a digital signal and a timing signal, comparing the ultrasonic wave signals detected in the detecting means with a reference signal to convert into timing signals, and detecting a relative phase difference of each of the ultrasonic wave signals with reference to a time when the infrared ray is detected;

coordinate calculating means for measuring a time difference of an average detection time of each of the ultrasonic waves detected at the plurality of ultrasonic wave receiving sensors with reference to a detection time of the infrared signal converted into the timing signal in the spatial position analyzing means to obtain a first coordinate value, measuring intensities of the plurality of ultrasonic waves of different characteristics received at one of the plurality of ultrasonic wave receiving sensors with reference to the detection time of the infrared signal converted into the timing signal in the spatial position analyzing means to obtain a second coordinate value, and calculating an average arrival time of the ultrasonic waves with reference to the detection time of the infrared ray signal converted into the timing signal in the spatial position analyzing means to obtain 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.

13. A device as claimed in claim 12, wherein the position pointing means includes,

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

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 the ultrasonic, and infrared carrier signals to convert into the plurality of ultrasonic wave signals of different characteristics and the infrared ray signal,

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

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

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

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

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

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

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

15. A device as claimed in claim 12, wherein the spatial position analyzing means includes,

a first comparator for comparing an envelope waveform of the ultrasonic wave signal received at one of the ultrasonic wave receiving sensors with an internal reference signal to convert into a timing signal,

a second comparator for comparing an envelope waveform of the ultrasonic wave signal received at a second of the ultrasonic wave receiving sensors with an internal reference signal to convert into a timing signal,

a third comparator for comparing an envelope waveform of the ultrasonic wave signal received at a third of the ultrasonic wave receiving sensors with an internal reference signal to convert into a timing signal,

an analog-to-digital converter for digitizing an envelope waveform of the infrared ray signal received at the infrared ray receiving sensor,

a fourth comparator for comparing an envelope waveform of the infrared ray signal received at the infrared ray receiving sensor with an internal reference signal to convert into a timing signal for using as a reference signal in calculation of coordinates and code analysis,

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

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

16. A device as claimed in claim 12, wherein the plurality of ultrasonic wave generating parts and the infrared ray emitting part in the position pointing means are arranged in a Y-axis direction at predetermined angles, and the plurality of ultrasonic wave receiving sensors and the infrared ray receiving sensor in the detecting means are mounted on the body of the electronic appliance in an X-axis direction spaced predetermined distances apart to cross the plurality of ultrasonic wave generating parts and the infrared ray emitting part in the position pointing means at a right angle.

17. A device as claimed in claim 12, wherein the plurality of ultrasonic wave generating parts and the infrared ray emitting part in the position pointing means are arranged in an X-axis direction at predetermined angles, and the plurality of ultrasonic wave receiving sensors and the infrared ray receiving sensor in the detecting means are mounted on the body of the electronic appliance in a Y-axis direction spaced predetermined distances apart to cross the plurality of ultrasonic wave generating parts and the infrared ray emitting part in the position pointing means at a right angle.

18. A device as claimed in claim 12, wherein the ultrasonic wave receiving sensors and the infrared ray receiving sensor in the detecting means are arranged in a system which can be detachable from the body of the electronic appliance.

19. A device as claimed in claim 12, wherein the plurality of ultrasonic wave generating parts in the position pointing means are arranged at positions different from one another and transmit ultrasonic waves of carrier frequencies different from one another on the same time.

20. A device as claimed in claim 12, wherein the plurality of ultrasonic wave generating parts in the position pointing means are arranged at positions different from one another and transmit ultrasonic waves of the same carrier frequency at timings different from one another.

21. A device as claimed in claim 12, wherein the first coordinate value is the X-axis coordinate value, the second coordinate value is the Y-axis coordinate value, and the third coordinate value is the Z-axis coordinate value.