TOUCH PANEL DEVICE

• US 20120200531A1
• Filed: 02/17/2010
• Published: 08/09/2012
• Est. Priority Date: 02/17/2010
• Status: Abandoned Application

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Araki, Mikio
• Application Number:
  US13/502,035
• Publication Number:
  US 20120200531A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

A touch panel device detects a touch position of a touch panel 4 by an electrostatic capacitance system with an opportunity that the interception of the infrared light irradiated on a touch surface is detected.

Claims

1. A touch panel device comprising:

a touch panel of an electrostatic capacitance system such that a touch input is detected according to whether a detection capacitance is beyond a predetermined threshold value or not;

a detection section that receives probe light irradiated on the touch surface of the touch panel to detect the presence or absence of the interception of the probe light from the intensity of the received light; and

a control section that performs the detection of a touch position of the touch panel by the electrostatic capacitance system such that the threshold value of the detection capacitance is set to a smaller value than the predetermined threshold value with an opportunity that the interception of the probe light is detected by the detection section.

2. A touch panel device comprising:

a touch panel of an electrostatic capacitance system such that a touch input is detected according to whether a detection capacitance is beyond a predetermined threshold value or not;

a detection section provided on the touch surface of the touch panel, having one pair of transparent substrates disposed apart from each other by a predetermined distance, and transparent electrodes formed on the opposing faces of the transparent substrates, respectively, wherein when a predetermined voltage is applied to one of the transparent electrodes, the depression of the transparent substrate is detected from a change in the voltage of the other transparent electrode due to a contact between the transparent electrodes; and

a control section that performs the detection of a touch position of the touch panel by the electrostatic capacitance system such that the threshold value of the detection capacitance is set to a smaller value than the predetermined threshold value with an opportunity that the depression of the transparent substrate is detected by the detection section.