INPUT DEVICE, INFORMATION PROCESSING DEVICE, AND PROGRAM

• US 20140362039A1
• Filed: 05/07/2014
• Published: 12/11/2014
• Est. Priority Date: 06/07/2013
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: IWAMURA, TOMOHITO
• Application Number:
  US14/272,035
• Publication Number:
  US 20140362039A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• 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
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

An input device includes a first detection unit which is configured to detect contact of an object with a contact surface to detect a contact position of the object, a second detection unit which is provided on the side opposite to the contact surface and which is configured to detect a contact position of the object when a pressure upon contact of the object is equal to or greater than a reference pressure, and a third detection unit which is configured to detect a contact position at a detection timing for detecting a contact position of the object, based on first and second contact positions that are detected by the second detection unit within a predetermined period of time since the detection timing, when the second detection unit does not detect a contact position at the detection timing but the first detection unit detects contact at the detection timing.

Claims

1. An input device, comprising:

a first detection unit which is configured to detect contact of an object with a contact surface to detect a contact position of the object;

a second detection unit which is provided on the side opposite to the contact surface and which is configured to detect a contact position of the object when a pressure upon contact of the object is equal to or greater than a reference pressure; and

a third detection unit which is configured to detect a contact position at a detection timing for detecting a contact position of the object, based on first and second contact positions that are detected by the second detection unit within a predetermined period of time since the detection timing, when the second detection unit does not detect a contact position at the detection timing but the first detection unit detects contact at the detection timing.

2. The input device according to claim 1, wherein

when the second detection unit does not detect any contact position and the first detection unit does not detect contact of the object, the third detection unit does not execute the detection of a contact position of the object based on the first and second contact positions.

3. The input device according to claim 1, wherein

the first contact position is a contact position that is detected by the second detection unit at a first detection timing preceding the detection timing, and

the second contact position is a contact position that is detected by the second detection unit at a second detection timing preceding the first detection timing.

4. The input device according to claim 1, wherein

the first contact position is a contact position that is detected by the second detection unit at a first detection timing preceding the detection timing, and

the second contact position is a contact position that is detected by the second detection unit at a second detection timing succeeding the detection timing.

5. The input device according to claim 1, wherein

the first detection unit includes an electrostatic capacitive touch panel that detects an electrostatic capacitance value between a plurality of electrodes disposed therein, and

the third detection unit determines that the object is in contact with the contact surface, when an electrostatic capacitance value detected by the first detection unit, is equal to or greater than a first threshold but less than a second threshold which is greater than the first threshold.

6. The input device according to claim 1, wherein

the first detection unit includes an electrostatic capacitive touch panel that detects an electrostatic capacitance value between a plurality of electrodes disposed therein, and

the third detection unit determines that the object is in contact with the contact surface, when a difference between a first electrostatic capacitance value detected by the first detection unit at the detection timing and a second electrostatic capacitance value detected by the first detection unit at a detection timing preceding the detection timing, is less than a predetermined threshold.

7. The input device according to claim 1, wherein

the second detection unit includes a resistance film type touch panel including a first transparent conductive film and a second transparent conductive film disposed opposite the first transparent conductive film, and detects a contact position of the object based on an electrical potential that is detected when the first and second transparent conductive films are brought into contact with each other by an external pressure.

8. An information processing device, comprising:

a first detection unit which is configured to detect contact of an object with a contact surface to detect a contact position of the object;

a second detection unit which is provided on the side opposite to the contact surface and which is configured to detect a contact position of the object when a pressure upon contact of the object is equal to or greater than a reference pressure;

a third detection unit which is configured to detect a contact position at a detection timing for detecting a contact position of the object, based on first and second contact positions that are detected by the second detection unit within a predetermined period of time since the detection timing, when the second detection unit does not detect a contact position at the detection timing but the first detection unit detects contact at the detection timing; and

a processing unit that executes an information process in accordance with the contact position.

9. A recording medium, in which is stored a program that is executed and readable by a computer and causes the computer to execute a digital signal process, the computer including a first detection unit which is configured to detect contact of an object with a contact surface to detect a contact position of the object, and a second detection unit which is provided on the side opposite to the contact surface and which is configured to detect a contact position of the object when a pressure upon contact of the object is equal to or greater than a reference pressure,

the digital signal process including:

determining whether the second detection unit does not detect any contact position but the first detection unit detects contact of the object at a detection timing for detecting a contact position of the object; and

detecting a contact position at the detection timing based on first and second contact positions that are detected by the second detection unit within a predetermined period of time since the detection timing, when the second detection unit does not detect any contact position but the first detection unit detects contact of the object.