ELECTRONIC DEVICE AND RECORDING MEDIUM

• US 20110248937A1
• Filed: 10/12/2010
• Published: 10/13/2011
• Est. Priority Date: 10/14/2009
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: NEC CASIO Mobile Communications Limited (NEC Corporation)
• Inventors: SUZUKI, MAHO
• Granted Patent: US 8,711,112 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: H04B 15/04 the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder

Abstract

A mobile communication terminal 100 has a touch panel unit 150 as an input unit. Touch detection is performed by scanning detection signals from the touch panel unit 150 at a given operation frequency. A radio device 120 performs communication such as cellular communication and reception of broadcast such as digital broadcast. When the radio device 120 performs radio transmission/reception operation, a touch detection processing unit 112 identifies an operation frequency of the touch panel unit 150 that is not interfered by the frequency of radio transmission/reception by the radio device 120 and a touch panel control unit 111 controls the touch panel unit 150 to scan it at that operation frequency.

Claims

1. An electronic device comprising a radio device and a touch panel, wherein the electronic device comprises:

a radio frequency identifying unit identifying the frequency used by said radio device;

an operation frequency identifying unit identifying an operation frequency of said touch panel that does not interfere with at least the radio frequency identified by said radio frequency identifying pert; and

a touch panel drive unit driving said touch panel at the operation frequency identified by said operation frequency identifying unit.

2. The electronic device according to claim 1 wherein:

the electronic device further comprises;

a display unit of which the display frequency can be switched;

a display frequency identifying unit indentifying a display frequency of said display unit that does not interfere with the radio frequency identified by said radio frequency identifying unit; and

a display control unit switching to the display frequency identified by said display frequency identifying unit and operating said display unit, and

said operation frequency identifying unit identifies said operation frequency that does not interfere with the display frequency identified by said display frequency identifying unit.

3. The electronic device according to claim 1 wherein:

the electronic device further comprises an interference determination unit determining whether or not the radio frequency identified by said radio frequency identifying unit interferes with the operation frequency of said touch panel, and

said operation frequency identifying unit identifies an operation frequency of said touch panel that does not interfere with the radio frequency when said interference determination unit affirms interference.

4. The electronic device according to claim 2 wherein:

the electronic device further comprises an interference determination unit determining whether or not the display frequency identified by said display frequency identifying unit interferes with the operation frequency of said touch panel, and

said operation frequency identifying unit identifies an operation frequency of said touch panel that does not interfere with the display frequency when said interference determination unit affirms interference.

5. The electronic device according to claim 1 wherein:

the electronic device further comprises a correspondence information memory storing correspondence information associating radio frequency information indicating multiple radio frequencies with operation frequency information indicating said operation frequencies that do not interfere with the radio frequencies indicated by the radio frequency information, and

said operation frequency identifying unit identifies said operation frequency based on said correspondence information.

6. The electronic device according to claim 5 wherein said correspondence information memory stores said correspondence information that associates display frequency information indicating multiple display frequencies with said radio frequency information and/or said operation frequency information.

7. The electronic device according to claim 1 wherein said operation frequency identifying unit identifies said operation frequency that is an integral multiple of the radio frequency identified by said radio frequency identifying unit and does not interfere with the radio frequency.

8. The electronic device according to claim 1 wherein the electronic device further comprises:

an error determination unit determining whether or not any touch detection error occurs when said touch panel drive unit drives said touch panel at an operation frequency identified by said operation frequency identification unit; and

an error processing unit processing errors when said error determination unit determines that any touch detection error has occurred.

9. The electronic device according to claim 8 wherein:

said radio device performs multiple types of radio transmission/reception, and

said error processing unit performs different error procedures according to the type of radio transmission/reception performed by said radio device.

10. A computer-readable recording medium in which recoded are programs that allow a computer controlling an electronic device comprising a radio device and a touch panel to realize the following functions:

identifying the frequency used by said radio device;

identifying an operation frequency of said touch panel that does not interfere with at least the identified radio frequency; and

driving said touch panel at the identified operation frequency.