Method of locating an object in 3D

• US 9,255,986 B2
• Filed: 07/08/2009
• Issued: 02/09/2016
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: Analog Devices, Inc.
• Original Assignee: Analog Devices, Inc.
• Inventors: Deliwala, Shrenik
• Primary Examiner(s): Sitta, Grant
• Application Number:
  US12/499,335
• Publication Number:
  US 20090281765A1
• Time in Patent Office: 2,407 Days
• Field of Search: 345156-158, 178/18.01
• US Class Current: 1/1
• CPC Class Codes: A63F 13/213 comprising photodetecting means, e.g. cameras, photodiodes or infrared cells A63F13/219, A63F13/655 take precedence
• CPC Class Codes: A63F 13/235 using a wireless connection, e.g. infrared or piconet
• CPC Class Codes: A63F 13/40 Processing input control signals of video game devices, e.g. signals generated by the player or derived from the environment
• CPC Class Codes: A63F 13/428 involving motion or position input signals, e.g. signals representing the rotation of an input controller or a player's arm motions sensed by accelerometers or gyroscopes
• CPC Class Codes: A63F 13/52 involving aspects of the displayed game scene
• CPC Class Codes: A63F 13/843 involving concurrently two or more players on the same game device, e.g. requiring the use of a plurality of controllers or of a specific view of game data for each player
• CPC Class Codes: A63F 13/90 Constructional details or arrangements of video game devices not provided for in groups A63F13/20 or A63F13/25, e.g. housing, wiring, connections or cabinets
• CPC Class Codes: A63F 2300/1006 having additional degrees of freedom
• CPC Class Codes: A63F 2300/1031 using a wireless connection, e.g. Bluetooth, infrared connections
• CPC Class Codes: A63F 2300/1087 comprising photodetecting means, e.g. a camera
• CPC Class Codes: A63F 2300/1093 using visible light
• CPC Class Codes: A63F 2300/6045 for mapping control signals received from the input arrangement into game commands
• CPC Class Codes: A63F 2300/66 for rendering three dimensional images
• CPC Class Codes: A63F 2300/8088 involving concurrently several players in a non-networked game, e.g. on the same game console
• CPC Class Codes: G01S 3/783 using amplitude comparison of signals derived from static detectors or detector systems
• CPC Class Codes: G01S 5/0009 Transmission of position information to remote stations involving assistance data G01S5/0236
• CPC Class Codes: G01S 5/163 Determination of attitude using inertial means G01C9/00; control of attitude G05D1/49

Abstract

Methods and devices for calculating the position of a movable device are disclosed. The device may include multiple optical detectors (ODs) and the movable device may include light sources. Optics may be above the ODs. A controller may calculate the position of the light source based on data from the ODs and properties of the optics. The device may be a game console, and the light source may be a game controller. The roles of the OD and light sources may be interchanged. The rotation of the movable device may be determined using multiple light sources and/or multiple ODs on the movable device. The movable device may calculate its position and transmit it to a console. The light sources may be modulated by time or frequency to distinguish between the light sources. There may be two or more movable devices. There may be two or more consoles.

Claims

1. A device for calculating a rotation of a movable device, comprising:

an optical detector having a light sensitive surface for generating signals at a plurality of edges of the light sensitive surface that are proportional to a relative location of light on the light sensitive surface with respect to each respective edge;

a controller communicatively coupled to the optical detector, configured to;

calculate length vectors of a distance between (i) a first light source and the optical detector and (ii) a second light source and the optical detector based on the generated signals corresponding to the relative location of light on the light sensitive surface from each of the light sources, and

calculate rotational information of the movable device based on changes to the calculated length vectors of the two light sources as the moveable device is rotated, wherein either the two light sources or the optical detector are part of the movable device;

wherein an angle of the length vectors is calculated based on a comparison of a ratio of the edge location proportional signals generated at the optical detector to a known angular distribution of each of the light sources.

2. The device of claim 1, wherein the controller is further configured to calculate the rotational information based on the spatial distribution pattern of the light received at the optical detector.

3. The device of claim 1, wherein the at least two light sources are used to calculate the rotation of the movable device about one axis and wherein the controller is further configured to:

calculate rotational information about a second axis based on data generated by the optical detector from receiving light from at least two additional light sources of the movable device.

4. The device of claim 1, wherein the controller is further configured to calculate the rotational information when the movable device is rotated in three dimensions.

5. An apparatus for calculating rotational information of a first device with respect to a second device, comprising:

an optical detector having a continuous light sensitive surface included as part of the first device that generates electrical signals proportional to a relative location of light on the light sensitive surface with respect to a plurality of edges of the surface;

a controller communicatively coupled to the optical detector for;

calculating length vectors of distances between a plurality of light sources included as part of the second device and the optical detector based on the generated signals corresponding to the relative location of light on the light sensitive surface from each of the light sources, and

the rotational information of the optical detector based on changes to the calculated length vectors;

wherein an angle of the length vectors is calculated based on a comparison of a ratio of the edge location proportional signals generated at the optical detector to a known angular distribution of each of the light sources.

6. The apparatus of claim 5, wherein the generated signals include at least one analog current signal proportional to an intensity of the detected distribution of light of at least one of the light sources on the continuous light sensitive surface.

7. The apparatus of claim 5, wherein the optical detector is capable of detecting the distribution of light from the plurality of light sources in two dimensions.

8. The apparatus of claim 7, wherein the generated signals include at least one analog current signal for each of the two dimensions proportional to an intensity of the detected distribution of light of at least one of the light sources in each of the two dimensions.

9. The apparatus of claim 5, wherein the first device is a portable device.

10. The apparatus of claim 5, wherein the second device is a portable device.

11. The apparatus of claim 5, further comprising a plurality of optical detectors included as part of the first device, each optical detector having the continuous light sensitive surface that generates electrical signals proportional to a relative location of light on the light sensitive surface with respect to a plurality of edges of the surface, wherein the controller calculates the rotational information of the plurality of optical detectors with respect to the plurality of light sources based on signals generated by plurality of the optical detectors corresponding to detected distributions of light from the plurality of light sources on the continuous light sensitive surface of each optical detector.

12. An apparatus for calculating rotational information of a first device with respect to a second device, comprising:

a plurality of optical detectors included as part of the first device, each optical detector having a continuous light sensitive surface that generates electrical signals proportional to a relative location of light on the light sensitive surface with respect to a plurality of edges of the surface;

a controller communicatively coupled to each optical detector for;

calculating length vectors of distances between a plurality of light sources included as part of the second device and the optical detector based on the generated signals corresponding to the relative location of light on the light sensitive surface from each of the light sources, and

calculating the rotational information of the optical detector based on changes to the calculated length vectors;

wherein an angle of the length vectors is calculated based on a comparison of a ratio of the edge location proportional signals generated at the optical detectors to a known angular distribution of each of the light sources.

13. The apparatus of claim 12, wherein at least one optical detector is capable of detecting the distribution of light from the light source in two dimensions.

14. The apparatus of claim 13, wherein the generated signal at the at least one optical detector capable of detecting the distribution of light from the light source in two dimensions includes at least one analog current signal in each of the two dimensions corresponding to a detected intensity of light in the respective dimension.

15. The apparatus of claim 12, wherein the first device is a portable device.

16. The apparatus of claim 12, wherein the second device is a portable device.

17. The apparatus of claim 12, wherein the controller is capable of calculating the rotational information of at least two of the optical detectors with respect to at least two of the light sources included as part of the second device.

18. A device for calculating a rotation of a movable device, comprising:

an optical detector having a light sensitive surface for generating signals at a plurality of edges of the light sensitive surface that are proportional to a relative location of light on the light sensitive surface with respect to each respective edge;

a controller communicatively coupled to the optical detector, configured to;

calculate length vectors of a distance between a first light source and a second light source, based on the generated signals corresponding to the relative location of light on the light sensitive surface from each of the light sources, and

calculate rotational information of the movable device based on changes to the calculated length vectors of the two light sources as the moveable device is rotated, wherein either the two light sources or the optical detector are part of the movable device,

wherein an angle of the length vectors is calculated based on a comparison of a ratio of the edge location proportional signals generated at the optical detector to a known angular distribution of each of the light sources.

19. The device of claim 18, wherein the optical detector is capable of detecting the distribution of light from the light source in two dimensions.

20. The device of claim 19, wherein the generated signal at the optical detector capable of detecting the distribution of light from the light source in two dimensions includes at least one analog current signal in each of the two dimensions corresponding to a detected intensity of light in the respective dimension.

21. The device of claim 18, wherein the controller is further configured to calculate the rotational information when the movable device is rotated in three dimensions.

22. The device of claim 18, wherein the controller is further configured to calculate the rotational information based on the spatial distribution pattern of the light received at the optical detector.

23. The device of claim 18, wherein the at least two light sources are used to calculate the rotation of the movable device about one axis and wherein the controller is further configured to:

calculate rotational information about a second axis based on data generated by the optical detector from receiving light from at least two additional light sources of the movable device.