TOUCH PANEL SYSTEM AND ELECTRONIC APPARATUS

• US 20160306496A1
• Filed: 03/31/2014
• Published: 10/20/2016
• Est. Priority Date: 04/25/2013
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: ITSUKI, Makoto, ISHIKAWA, Takashi, AZUMA, Hitoshi
• Application Number:
  US14/783,030
• Publication Number:
  US 20160306496A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/044 by capacitive means
• 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

Detection accuracy of an indicator is improved. In a touch panel system 1 for, when an input position is indicated to a touch panel 3, displaying corresponding thereto, a detection standard determining section 615 within a controller section 6 comprises a strength correcting section 615F, which performs strength-correction on a capacitance property of height information z, which periodically varies with regard to at least either of the x or y direction of a detection surface (x, y), to a uniform capacitance property, with regard to distribution of three-dimensional coordinates (x, y, z) including height information z of a capacitance value that periodically varies for each predetermined position within the detection surface (x, y) obtained from respective output signals of the touch panel 3.

Claims

1. A touch panel system for, when an input position is indicated to a touch panel, outputting positional information (x, y) of a detection surface obtained from an output signal of the touch panel and information of a capacitance value corresponding thereto, the touch panel system comprising a strength correcting section for correcting variation of a capacitance property that periodically varies for each predetermined position within the detection surface with regard to at least either of an x or y direction of positional information (x, y) of the detection surface.

2. The touch panel system according to claim 1, wherein within a cycle of at least one direction in which a capacitance property varies for each predetermined position, the strength correcting section determines information of a capacitance value to be output as information of any one of the capacitance values within the range of the cycle obtained within the cycle.

3. The touch panel system according to claim 1, wherein the strength correcting section is provided with a storing section, the strength correcting section monitors a periodic, specific coordinate range of at least one direction of the x and y directions of the detection surface (x, y), the strength correcting section updates information of the capacitance value in the specific coordinate range onto the storing section, and the strength correcting section uses information of the capacitance value stored on the storing section immediately before for a coordinate range other than the specific coordinate range to correct the capacitance value.

4. The touch panel system according to claim 1, wherein:

the strength correcting section is provided with a storing section;

one or a plurality of correction tables, having a plurality of correction parameters in accordance with coordinate positions in the x direction and the y direction of a detection surface, are stored on the storing section; and

the strength correcting section performs strength-correction on a capacitance property of the height information that periodically varies, to a uniform capacitance property, using a correction parameter in accordance with the coordinate position, while referring to the one or a plurality of correction tables in accordance with information of the capacitance value.

5. An electronic device capable of performing displaying by corresponding to a positional input with a touch panel system according to claim 1.