Plasma display device

• US 20090212702A1
• Filed: 02/12/2009
• Published: 08/27/2009
• Est. Priority Date: 02/25/2008
• Status: Active Grant

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Lee, Chun-Gyoo, Yim, Sang-Hoon, Rhee, Jong-Han, Cho, Yu-Jeong
• Granted Patent: US 8,093,810 B2
• Time in Patent Office: Days
• US Class Current: 313/582
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen

Abstract

A plasma display device embodying a touch panel function utilizing infrared rays that are generated when displaying an image and that are emitted in a uniform distribution manner in a display area. The plasma display device includes: a plasma display panel (PDP) for displaying an image; a chassis base attached to and supporting the PDP; an infrared ray sensor at a front surface or a rear surface of the PDP for detecting a change in amount of infrared rays emitted from the PDP; and a controller for receiving a detection signal and determining a position of the change in amount of infrared rays, the position of the change in amount of infrared rays defining a touch position.

Claims

1. A plasma display device comprising:

a plasma display panel (PDP) for displaying an image;

a chassis base attached to and supporting the PDP;

an infrared ray sensor at a front surface or a rear surface of the PDP for detecting a change in amount of infrared rays emitted from the PDP; and

a controller for receiving a detection signal and determining a position of the change in amount of infrared rays, the position of the change in amount of infrared rays defining a touch position.

2. The plasma display device of claim 1, wherein the infrared ray sensor includes a front infrared ray sensor at the front surface of the PDP.

3. The plasma display device of claim 2, wherein the PDP comprises:

a display area for displaying the image; and

a non-display area at a periphery of the display area,

wherein the front infrared ray sensor comprises a first front infrared ray sensor, a second front infrared ray sensor, a third front infrared ray sensor, and a fourth front infrared ray sensor in the non-display area corresponding to each of four corners of a quadrangle of the display area.

4. The plasma display device of claim 1, wherein the infrared ray sensor includes a rear infrared ray sensor at the rear surface of the PDP.

5. The plasma display device of claim 4, wherein the PDP comprises:

a display area for displaying the image; and

a non-display area at a periphery of the display area,

wherein the rear infrared ray sensor comprises a first rear infrared ray sensor, a second rear infrared ray sensor, a third rear infrared ray sensor, and a fourth rear infrared ray sensor in the non-display area corresponding to each of four corners of a quadrangle of the display area.

6. The plasma display device of claim 1, further comprising a printed circuit board assembly (PBA) at a rear surface of the chassis base and electrically coupled to the PDP,

wherein the PBA comprises the controller.

7. The plasma display device of claim 1, wherein the PDP comprises:

a pair of longitudinal sides opposite each other and a pair of lateral sides orthogonal to the longitudinal sides and opposite each other,

wherein the chassis base comprises;

a first horizontal member attached to the PDP and facing the pair of longitudinal sides and the pair of lateral sides;

a vertical member attached to the first horizontal member and extending away from the PDP; and

a second horizontal member attached to the vertical member and substantially parallel to the first horizontal member.

8. The plasma display device of claim 7, wherein the first horizontal member is a frame having a quadrangular shape corresponding to the pair of longitudinal sides and the pair of lateral sides.

9. The plasma display device of claim 8, further comprising a double-sided adhesive tape between the PDP and the first horizontal member.

10. The plasma display device of claim 7, wherein the vertical member comprises a vent hole for venting air from a space between the rear surface of the PDP and the second horizontal member.

11. A plasma display device comprising:

a plasma display panel (PDP) for displaying an image;

a chassis base attached to and supporting the PDP;

an infrared ray camera at a front surface or a rear surface of the PDP for photographing a change in amount of infrared rays emitted from the PDP; and

a controller or a printed circuit board assembly (PBA) for receiving a photograph signal and determining a position of the change in amount of infrared rays, the position of the change in amount of infrared rays defining a touch position.

12. The plasma display device of claim 11, wherein the infrared ray camera is at the front surface of the PDP, and

infrared rays emitted from the front surface of the PDP have a wavelength range from about 800 nm to about 1000 nm.

13. The plasma display device of claim 11, wherein the infrared ray camera is at the rear surface of the PDP, and

the infrared rays are reflected from the front surface of the PDP to the rear surface and have a wavelength range from about 800 nm to about 1000 nm when they are emitted from the rear surface.

14. The plasma display device of claim 11, wherein the PDP comprises:

a display area for displaying the image; and

a non-display area at a periphery of the display area,

wherein the infrared ray camera comprises a first infrared ray camera, a second infrared ray camera, a third infrared ray camera, and a fourth infrared ray camera in the non-display area corresponding to each of four corners of a quadrangle of the display area.

15. The plasma display device of claim 14, wherein the first, second, third, and fourth infrared ray cameras have a first detection area, a second detection area, a third detection area, and a fourth detection area, respectively, each of the detection areas occupying at least one quarter of the display area at each of the corners.

16. The plasma display device of claim 15, wherein at least one of the first, second, third, and fourth detection areas overlaps another of the first, second, third, and fourth detection areas.

17. The plasma display device of claim 15, wherein the first, second, third, and fourth infrared ray cameras detect a change in amount of infrared rays emitted from the front surface of the PDP corresponding to the first, second, third, and fourth detection areas, respectively.

18. A plasma display device comprising:

a plasma display panel (PDP) for displaying an image;

a chassis base attached to and supporting the PDP;

a detector at a front surface, a rear surface, or a side surface of the PDP for detecting a change in amount of infrared rays emitted from the PDP; and

a controller for receiving a detection signal from the detector and determining a position of the change in amount of infrared rays, the position of the change in amount of infrared rays defining a touch position.

19. The plasma display device of claim 18, wherein the detector comprises at least one of an infrared ray sensor or an infrared ray camera.

20. The plasma display device of claim 19, wherein the at least one of an infrared ray sensor or an infrared ray camera comprises a feedback loop that re-detects infrared rays emitted from the PDP.

21. The plasma display device of claim 18, wherein the detector includes at least two detectors for determining the position using two intersecting shafts.

22. The plasma display device of claim 18, further comprising an infrared ray passage filter for transmitting a wavelength range from about 800 nm to about 1000 nm of infrared rays emitted from the PDP.

23. The plasma display device of claim 22, further comprising a light receiving sensor for detecting infrared rays radiated from a remote control controlling the PDP, and

a light receiving sensor filter for transmitting a wavelength range from about 900 nm to about 950 nm of infrared rays radiated from the remote control and for shielding other wavelength ranges among a wavelength range from about 800 nm to about 1000 nm of the infrared rays.

24. The plasma display device of claim 23, further comprising a front case covering a side of the PDP and a rear case covering a side of the chassis base, the front case and the rear case coupled to each other,

wherein the light receiving sensor is at the inside of the front case at an outer region of the PDP, and

the light receiving sensor filter is at the front of the light receiving sensor.

25. The plasma display device of claim 23, wherein the light receiving sensor filter is a phosphate glass filter including dihydric copper ions, a filter including a thin layer of metal on a glass surface, or a filter including a resin having a pigment.