DISPLAY DEVICE

• US 20130021293A1
• Filed: 03/01/2011
• Published: 01/24/2013
• Est. Priority Date: 03/01/2010
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Nakai, Jun
• Application Number:
  US13/581,654
• Publication Number:
  US 20130021293A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A PND (10) having a touch panel (18) is provided with a switch (31) turned on when an operator holds the PND (10) by one hand. Further, the PND (10) is configured to change and set a touch detection threshold to detect, according to “ON” or “OFF” of this switch (31), whether the operator touches the touch panel (18). By this means, it is possible to increase the detection accuracy of a touch operation in a simple configuration.

Claims

1. A display device having a capacitive touch panel in front of an image display unit, the touch panel detecting a capacitance change, the display device comprising:

a control unit that sets a threshold to be compared to a variation of a capacitance detected by the touch panel to determine whether the touch panel is operated; and

a switch that causes the control unit to detect that the display device is held by an operator,

wherein the control unit sets the threshold to a different value according to a detection result using the switch.

2. The display device according to claim 1, wherein the control unit sets a threshold for a case where it is detected by the switch that the operator holds the display device to a value lower than a threshold for a case where it is not detected that the operator holds the display device.

3. The display device according to claim 1, wherein the switch is provided in a margin of the display device and a lower left side of the image display unit in a front view.

4. The display device according to claim 1, wherein the switch is provided in a margin of the display device and a lower right side of the image display unit in a front view.

5. The display device according to claim 1, wherein the switch is provided in a margin of the display device and lower left and right of the image display unit in a front view.

6. The display device according to claim 1, wherein:

the switch comprises a first switch and a second switch;

the control unit sets the threshold to a first threshold when it is detected that the first switch and the second switch are turned off, sets the threshold to a second threshold when it is detected that only the first switch is turned on, and sets the threshold to a third threshold when it is detected that both of the first switch and the second switch are turned on; and

the third threshold is a value lower than the second threshold and the second threshold is a value lower than the first threshold.

7. The display device according to claim 6, wherein the first switch is provided in a margin of the display device and one of a lower right side and lower left side of the image display unit in a front view, and the second switch is provided in the other side of the image display unit.

8. The display device according to claim 1, further comprising a storage unit that stores several kinds of icon layouts,

wherein the control unit sets the threshold to a different value according to the detection result using the switch and displays the icon layout corresponding to the detection result using the switch on the image display unit.

9. The display device according to claim 8, wherein the control unit displays a one-hand operation layout on the image display unit when it is detected that the operator holds the display device, the one-hand operation layout being an icon layout in which operation icons are arranged near the switch.

10. The display device according to claim 9, wherein the operation icons are arranged in line in the one-hand operation layout.

11. The display device according to claim 9, wherein operation icons are arranged in a plurality of lines in the one-hand operation layout.

12. The display device according to claim 9, wherein the operation icons are arranged in an arc-like manner in the one-hand operation layout.

13. A display device having a capacitive touch panel that detects a capacitance change, in front of an image display unit, the display device comprising:

a control unit that sets a threshold to be compared to a variation of a capacitance detected by the touch panel to determine whether the touch panel is operated; and

a switch that causes the control unit to detect that the display device is attached to a stand,

wherein the control unit sets the threshold to a different value according to a detection result using the switch.

14. The display device according to claim 13, wherein the control unit sets a threshold for a case where it is detected by the switch that the display device is attached to the stand to a value greater than a threshold for a case where it is not detected that the display device is attached to the stand.