Information processing apparatus, operation input method, and sensing device

• US 7,903,094 B2
• Filed: 06/20/2007
• Issued: 03/08/2011
• Est. Priority Date: 06/23/2006
• Status: Active Grant

• Current Assignee: Wacom Co Limited (Wacom)
• Original Assignee: Wacom Co Limited (Wacom)
• Inventors: Katsuhito, Obi, Horie, Toshihiko
• Primary Examiner(s): Wang; Quan-Zhen
• Assistant Examiner(s): Sheng; Tom V
• Application Number:
  US11/812,672
• Publication Number:
  US 20080042985A1
• Time in Patent Office: 1,357 Days
• Field of Search: 345173-177, 345/179, 178 1801- 1807, 178/19.05, 382/314
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

An information processing apparatus includes an operation surface, a first sense unit for electrically detecting whether the operation surface is directly touched, a second sense unit for detecting whether the position pointing device approaches or contacts the operation surface based on an electromagnetic interaction, an approach detector for detecting whether the position pointing device approaches a first detection range from the operation surface and whether the position pointing device approaches a second detection range based on an output from the second sense unit. The second detection range is closer to the operation surface than the first detection range. The information processing apparatus further includes a display controller for disabling display processing based on an output from the first sense unit if the approach detector determines that the position pointing device approaches the second detection range and for performing display processing based on an output from the second sense unit.

Claims

1. An information processing apparatus, comprising:

an operation surface;

a first sense unit for electrically detecting whether said operation surface is being directly touched;

a second sense unit for detecting whether a position pointing device approaches or contacts said operation surface based on an electromagnetic interaction generated between the position pointing device and said second sense unit;

an approach detecting unit for detecting whether the position pointing device is within a first detection range from said operation surface and whether the position pointing device is within a second detection range based on an output from said second sense unit, the first detection range extending further from said operation surface than said second detection range; and

a display control unit for disabling display processing based on a detection output from said first sense unit and for enabling display processing based on a detection output from said second sense unit if said approach detecting unit determines that the position pointing device is within of said second detection range.

2. The information processing apparatus according to claim 1, wherein said second sense unit is located under said first sense unit.

3. The information processing apparatus according to claim 1, wherein said second sense unit has an area that is greater than an area of said first sense unit.

4. The information processing apparatus according to claim 1, wherein:

said display control unit continuously disables display processing based on the detection output from said first sense unit if it is determined by said first sense unit that said operation surface is touched when the position pointing device is moved outside of said second detection range from a state in which the position pointing device lies within said second detection range; and

said display control unit enables display processing based on the detection output from said first sense unit if said first sense unit determines that said operation surface is not touched.

5. The information processing apparatus according to claim 1, wherein said display control unit enables the display processing to be performed based on the detection output from said first sense unit if said approach detecting unit determines that the position pointing device is not within the first detection range, disables the display processing based on the detection output from said first sense unit if it is determined that the position pointing device is within the first detection range from said operation surface, and enables the display processing to be performed based on the detection output from said second sense unit if it is determined that the position pointing device lies within said second detection range.

6. The information processing apparatus according to claim 5, wherein said display control unit begins preparation processing of said second sense unit to detect a position at which the position pointing device approaches or contacts said operation surface if it is determined that the position pointing device approaches within the first detection range from said operation surface.

7. The information processing apparatus according to claim 5, wherein said display control unit performs display processing based on a distance from the operation surface if it is determined that the position pointing device approaches within the second detection range from said operation surface.

8. An operation input method of accepting input at an operation surface of an information processing apparatus, the method comprising:

a first detection processing for electrically detecting whether the operation surface is directly touched;

a second detection processing for detecting whether a position pointing device approaches or contacts the operation surface based on an electromagnetic interaction with the position pointing device;

an approach detection processing for detecting whether the position pointing device approaches within a first detection range from the operation surface and whether the position pointing device approaches within a second detection range based on an output from said second detection processing, the first detection range extending further from the operation surface than the second detection range; and

a display control processing for disabling display processing based on a detection output from said first detection processing if said approach detection processing determines that the position pointing device approaches the second detection range, and for enabling display processing based on a detection output from said second detection processing if said approach detection processing determines that the position pointing device approaches within the second detection range.

9. The operation input method according to claim 8, wherein the display control processing enables the display processing based on the detected output of said first detection processing to be performed if said second detection processing determines that the position pointing device does not approach within the first detection range from the operation surface, disables the display processing based on the detected output of said first detection processing if it is determined that the position pointing device approaches within the first detection range from the operation surface, and enables the display processing based on the detected output of said second detection processing to be performed if it is determined that the position pointing device is within the second detection range which is closer to the operation surface than said first detection range.

10. An information processing apparatus having a display device with a display surface operable as an operation surface, the apparatus comprising:

a sense unit formed on a transparent substrate and having a first sensor electrode disposed on the display surface of said display device to electrically detect whether said display surface is directly touched and a second sensor electrode to detect whether a position pointing device approaches or contacts said display surface based on an electromagnetic interaction generated between said second sensor electrode and the position pointing device;

an approach detecting unit for detecting whether the position pointing device is located within a first detection range from said display surface and whether said position pointing device is located within a second detection range based on an output from said second sensor electrode, the second detection range being closer to said display surface than the first detection range; and

a display control unit for disabling display processing at said display device based on an output from said first sensor electrode and for enabling said display device to perform display processing based on an output from said second sensor electrode if said approach detecting unit determines that the position pointing device is within the second detection range.

11. The information processing apparatus according to claim 10, wherein said first sensor electrode and said second sensor electrode are a common electrode located on the display surface of said display device, said common electrode being used as said first sensor electrode to detect whether said display surface is directly touched and as said second sensor electrode to detect whether the position pointing device approaches or contacts said display surface in a time-sharing manner.

12. The information processing apparatus according to claim 11, wherein at least part of said first sensor electrode and said second sensor electrode are alternately located on a transparent substrate of said sense unit.

13. A sensing device usable with an information processing apparatus, the device comprising:

an operation surface having a predefined first detection region and a predefined second detection region disposed thereabove; and

a sensing unit having a plurality of detection mechanisms to sense a position of a position pointing device with reference to the first and second detection regions and to selectively operate the detection mechanisms based on the sensed position of the position pointing device with reference to the first and second detection regions, wherein the second detection region is a second predetermined height and extends along the operation surface slightly beyond a perimeter of the operation surface, and the first detection region contains the second detection region therein and is a first predetermined height and extends along the operation surface substantially beyond the perimeter of the operation surface.

14. The sensing device according to claim 13, further comprising:

a control unit to perform a first detection processing operation when the position pointing device is determined to be in the first detection region, a second detection processing operation when the position pointing device is determined to be in the second detection region, and a third detection processing when the position pointing device is determined to be in neither one of the first and second detection regions.

15. The sensing device according to claim 13, wherein the detection mechanisms include an electromagnetic detection unit having a plurality of loop coils and an electrostatic detection unit including a plurality of sensing electrodes, the detection mechanisms residing below the operation surface in the information processing apparatus.

16. The sensing device according to claim 13, wherein the sensing unit disables and enables the detection mechanisms based on the sensed position of the position pointing device such that an input from only one detection mechanism is processed at any given time.

17. The sensing device according to claim 13, wherein a first detection mechanism senses a touch input and a second detection mechanism senses a position pointing device input, and the sensing unit prioritizes the position pointing device input when the position pointing device is detected within the first and second detection ranges.

18. The sensing device according to claim 13, wherein the first detection region is further away from the operation than the second detection region.

19. The sensing device according to claim 13, wherein the information processing apparatus is one of a lap top computer, a notebook computer, a tablet computer, and an electronic paper device.

20. The sensing device according to claim 13, wherein the detection mechanisms comprise a first detection mechanism and a second detection mechanism disposed on opposite sides of a display panel.

21. The sensing device according to claim 13, wherein the detecting mechanisms include first and second detection mechanisms integrally formed with one another on the operation surface.

22. A sensing device usable with an information processing apparatus, the device comprising:

an operation surface having a predefined first detection region and a predefined second detection region disposed thereabove; and

a sensing unit having a plurality of detection mechanisms to sense a position of a position pointing device with reference to the first and second detection regions and to selectively operate the detection mechanisms based on the sensed position of the position pointing device with reference to the first and second detection regions, wherein the detection mechanisms include a contact sensor to detect contact on the operation surface and an approach sensor to detect an approach of the position pointing device, the detection mechanisms distinguishing between a first state in which the position pointing device contacts the operation surface, a second state in which the position pointing device is disposed in the first detection region, a third state in which the position pointing device is disposed in the second detection region, and a fourth state in which the position pointing device is not disposed in either of the first and second detection regions.

23. A method of controlling a sensing device having at least two detecting mechanisms disposed below an operation surface in an information processing apparatus, the method comprising:

detecting a distance of a pointing device from the operation surface using a first detection mechanism with reference to first and second detection regions above the operation surface;

if the position pointing device is in the first detection region, preparing the first detection mechanism to determine a coordinate position of the position pointing device with respect to the operation surface;

if the position pointing device is in the second detection region, enabling the first detection mechanism to determine the coordinate position of the position pointing device with respect to the operation surface and enabling processing of the determined coordinate position; and

if the position pointing device is in neither one of the first and second detection regions, enabling a second detection mechanism to determine a coordinate position of contact on the operation surface and enabling processing of the determined coordinate position of the contact.