POINTING SYSTEM AND DISPLAY HAVING IMPROVED OPERABLE RANGE

• US 20140191959A1
• Filed: 12/04/2013
• Published: 07/10/2014
• Est. Priority Date: 01/09/2013
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: KAO, MING-TSAN, LIANG, CHIA-CHEUN
• Granted Patent: US 9,606,639 B2
• Time in Patent Office: Days
• US Class Current: 345/157
• CPC Class Codes: G06F 3/0304 Detection arrangements using opto-electronic means constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042
• CPC Class Codes: G06F 3/0308 comprising a plurality of distinctive and separately oriented light emitters or reflectors associated to the pointing device, e.g. remote cursor controller with distinct and separately oriented LEDs at the tip whose radiations are captured by a photo-detector associated to the screen
• CPC Class Codes: G06F 3/0317 in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface
• CPC Class Codes: G06F 3/0325 using a plurality of light emitters or reflectors or a plurality of detectors forming a reference frame from which to derive the orientation of the object, e.g. by triangulation or on the basis of reference deformation in the picked up image
• CPC Class Codes: G06F 3/033 Pointing devices displaced or positioned by the user , e.g. mice, trackballs, pens or joysticks; Accessories therefor digitisers characterised by the transducing means G06F3/041
• 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: G06F 3/0354 with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks

Abstract

There is provided a pointing system including an image sensor, a plurality of reference marks and a processing unit. The image sensor is configured to capture image frames containing at least one reference mark image of the reference marks. The processing unit is configured to recognize an image number of the reference mark image and calculate an aiming point coordinate according to a positioning algorithm associated with the image number.

Claims

1. A pointing system, comprising:

a plurality of reference marks illuminating with an identifiable spectrum; and

a remote controller configured to capture an image frame containing at least one reference mark image of the reference marks and perform pointer positioning according to a positioning algorithm associated with an image number of the reference mark image in the image frame.

2. The pointing system as claimed in claim 1, wherein the reference marks are integrated with a display device having a display screen.

3. The pointing system as claimed in claim 1, wherein the remote controller further comprises an accelerometer.

4. The pointing system as claimed in claim 1, wherein the remote controller comprises a processing unit configured to execute the positioning algorithm associated with different image numbers.

5. The pointing system as claimed in claim 4, wherein the processing unit executes one of the positioning algorithms associated with the image number of 1-4;

and when the image number is larger than 4, the processing unit performs the pointer positioning according to the positioning algorithm associated with the image number of 4.

6. The pointing system as claimed in claim 1, further comprising a modulation unit configured to modulate at least one of an illumination frequency and an illumination brightness value of the reference marks.

7. The pointing system as claimed in claim 1, wherein the remote controller further distinguishes different reference marks and distinguishes the reference marks from ambient light according to features of the reference mark images.

8. A display system, comprising:

a display device showing a cursor;

a plurality of reference marks illuminating with an identifiable spectrum; and

a remote controller configured to capture an image frame containing at least one reference mark image of the reference marks, calculate and output a cursor coordinate of the cursor according to a positioning algorithm associated with an image number of the reference mark image in the image frame.

9. The display system as claimed in claim 8, wherein the reference marks are integrated with or separated from the display device.

10. The display system as claimed in claim 8, wherein the remote controller further comprises an accelerometer.

11. The display system as claimed in claim 8, wherein the remote controller comprises a processing unit configured to execute the positioning algorithm associated with different image numbers.

12. The display system as claimed in claim 11, wherein the processing unit executes one of the positioning algorithms associated with the image number of 1-4;

and when the image number is larger than 4, the processing unit calculates and outputs the cursor coordinate according to the positioning algorithm associated with the image number of 4.

13. The display system as claimed in claim 8, further comprising a modulation unit configured to modulate at least one of an illumination frequency and an illumination brightness value of the reference marks.

14. The display system as claimed in claim 8, wherein the remote controller further distinguishes different reference marks and distinguishes the reference marks from ambient light according to features of the reference mark images.

15. A pointing system, comprising:

a plurality of reference marks illuminating with an identifiable spectrum; and

a remote controller configured to capture an image frame containing at least one reference mark image of the reference marks, recognize a reference mark image number, output a pointing coordinate according to the image frame when the reference mark image number is equal to a reference mark number of the reference marks, and output a relative displacement according to the image frame when the reference mark image number is smaller than the reference mark number.

16. The pointing system as claimed in claim 15, wherein when the reference mark image number is smaller than the reference mark number and larger than 1, the remote controller calculates the relative displacement according to one of the reference mark images or an average position of the reference mark images in the image frame.

17. The pointing system as claimed in claim 15, wherein the reference mark number is 4.

18. The pointing system as claimed in claim 15, wherein the remote controller further comprises an accelerometer.

19. The pointing system as claimed in claim 15, further comprising a modulation unit configured to modulate at least one of an illumination frequency and an illumination brightness value of the reference marks.

20. The pointing system as claimed in claim 15, wherein the remote controller further distinguishes different reference marks and distinguishes the reference marks from ambient light according to features of the reference mark images.