Pointing device, display apparatus and pointing system, and location data generation method and display method using the same

• US 8,711,092 B2
• Filed: 12/23/2009
• Issued: 04/29/2014
• Est. Priority Date: 06/13/2009
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Soh, Byung-seok, Choi, Sang-on, Choi, Im-su
• Primary Examiner(s): LEE, NICHOLAS J
• Application Number:
  US12/646,219
• Publication Number:
  US 20100315332A1
• Time in Patent Office: 1,588 Days
• Field of Search: None
• US Class Current: 345/157
• CPC Class Codes: G06F 3/03542 Light pens for emitting or receiving light
• CPC Class Codes: G06F 3/0386 for light pen
• CPC Class Codes: G06F 3/04162 for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184

Abstract

A pointing device, a display apparatus and a pointing system, and a location data generation method and a display method using the same are provided. The pointing device includes a sensor that detects signals, a storage unit which stores a signal pattern and a controller which generates location data corresponding to a time at which a signal is detected. Using the detected signals, it is possible to more precisely determine a location of the pointing device on a display apparatus, and to minimize errors caused by delays that may occur when the pointing device is wirelessly connected to the display apparatus.

Claims

1. A pointing device comprising:

a sensor which detects a first signal and a second signal;

a storage unit which stores a preset signal pattern; and

a controller which generates a first pattern that represents a time at which the first signal is detected, compares the preset signal pattern to the first pattern, and generates location data corresponding to a time at which the second signal is detected according to a result of comparison.

2. The pointing device as claimed in claim 1, wherein the controller sets the time at which the first signal is detected to be a reference time, and generates location data corresponding to the time at which the second signal is detected.

3. The pointing device as claimed in claim 1, wherein, if the preset signal pattern is at least partly identical to the first pattern, the controller generates the location data.

4. The pointing device as claimed in claim 1, wherein the second signal comprises an X-axis signal related to an X-axis location of the pointing device on a display and a Y-axis signal related to a Y-axis location of the pointing device on the display, and

wherein the controller generates X-axis location data of the pointing device based on a difference between the time at which the first signal is detected and a time at which the X-axis signal is detected, and generates Y-axis location data of the pointing device based on a difference between the time at which the first signal is detected and a time at which the Y-axis signal is detected.

5. The pointing device as claimed in claim 1, wherein the location data comprises information that indicates a point where the pointing device is located on a surface of a display.

6. The pointing device as claimed in claim 1, wherein the first signal is an electromagnetic interference (EMI) signal which is detected from a display.

7. The pointing device as claimed in claim 1, wherein the second signal is an infrared (IR) signal which is detected at a point where the pointing device is located on a surface of a display.

8. The pointing device as claimed in claim 1, further comprising:

a communication interface which transmits the location data to a display connected to the pointing device.

9. The pointing device as claimed in claim 8, wherein the controller determines a location of the pointing device on the display based on the location data, and controls the determined location to be transmitted via the communication interface to the display.

10. The pointing device as claimed in claim 1, wherein the first signal and the second signal are signals having values equal to or greater than a preset threshold among signals detected from a display.

11. A display apparatus comprising:

a display panel;

a driving unit which applies a driving voltage to the display panel; and

a controller which controls the driving unit to apply the driving voltage to the display panel at a first time and at a second time,

wherein the display panel emits, to an external device, a first signal having a first pattern when the driving voltage is applied at the first time and emits a second signal, which causes the external device to generate location data, when the driving voltage is applied at the second time.

12. The display apparatus as claimed in claim 11, wherein the second signal comprises a first infrared (IR) signal which is sequentially emitted from rows of cells of the display panel, and a second IR signal which is sequentially emitted from columns of cells of the display panel.

13. The display apparatus as claimed in claim 12, wherein the first IR signal is emitted at regular intervals from each row of cells of the display panel, and the second IR signal is emitted at regular intervals from each column of cells of the display panel.

14. The display apparatus as claimed in claim 12, wherein the controller controls the first IR signal to be emitted after a first preset period of time elapses based on the first signal, and controls the second IR signal to be emitted after a second preset period of time elapses based on the first signal.

15. The display apparatus as claimed in claim 11, wherein the controller controls the first signal and the second signal to be emitted in a predetermined subfield among a plurality of subfields forming a single frame of a video.

16. The display apparatus as claimed in claim 15, wherein the predetermined subfield is disposed on a foremost portion of the frame and

does not contain video data, and the other subfields contain video data.

17. The display apparatus as claimed in claim 11, wherein the controller controls the first signal to be emitted in a reset period of a cell provided in the display panel, and controls the second signal to be emitted in an address period of the cell.

18. The display apparatus as claimed in claim 11, wherein the first signal is an electromagnetic interference (EMI) signal which is emitted in response to the applied driving voltage.

19. The display apparatus as claimed in claim 11, further comprising:

a communication interface which receives the location data regarding a location of the external device on the display apparatus from the external device,

wherein the controller controls the display panel to display an output at the location using the received location data.

20. A display method comprising:

emitting a first signal having a first pattern;

emitting a second signal;

detecting the first signal and second signal, and generating, if the first pattern is at least partly identical to a pre-stored pattern, data regarding a location on a display in which the first signal and second signal are detected based on the second signal; and

displaying an output based on the generated data at the location.

21. A pointing device comprising:

a sensor which detects a first signal and a second signal;

a storage unit which stores a preset signal pattern; and

a controller which generates a first pattern based on the detected first signal, determines a reference time by comparing the preset signal pattern to the first pattern, and generates location data corresponding to a time at which the second signal is detected and the reference time.

22. A display apparatus comprising:

a display panel;

a driving unit which applies a driving voltage to the display panel; and

a controller which controls the driving unit to apply the driving voltage to the display panel at a first time and at a second time,

wherein the display panel emits a first signal having a first pattern when the driving voltage is applied at the first time and emits a second signal when the driving voltage is applied at the second time,

wherein the second signal comprises a first infrared (IR) signal which is sequentially emitted from rows of cells of the display panel, and a second IR signal which is sequentially emitted from columns of cells of the display panel.

23. A display apparatus comprising:

a display panel;

a driving unit which applies a driving voltage to the display panel; and

a controller which controls the driving unit to apply the driving voltage to the display panel at a first time and at a second time,

wherein the display panel emits a first signal having a first pattern when the driving voltage is applied at the first time and emits a second signal when the driving voltage is applied at the second time,

wherein the first signal is an electromagnetic interference (EMI) signal which is emitted in response to the applied driving voltage.