Touch panel, driving method for the touch panel, program for getting touch information, and memory media

• US 8,963,852 B2
• Filed: 08/17/2011
• Issued: 02/24/2015
• Est. Priority Date: 08/20/2010
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Matsui, Yoshikazu, Sumi, Naoki
• Primary Examiner(s): MARINELLI, PATRICK
• Application Number:
  US13/212,169
• Publication Number:
  US 20120044180A1
• Time in Patent Office: 1,287 Days
• Field of Search: 345156-184, 345/104, 178 1801- 2004
• US Class Current: 345/173
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• 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

The purpose of the invention is to provide a touch panel, a driving method for the touch panel, a program for getting touch information, and a memory media, capable of reducing the influence caused by the operation of a display device to the touch panel. The touch panel having a display driven by alternative voltage and a touch sensor reading the touch information from the input interface periodically, includes a touch information detection part synchronizing the beginning timing of a reading operation of the touch sensor with a frame of the display and detecting the touch data in each frame, and a touch information calculation part calculating an average with respect to an even number of successive frames to get a calculated touch data corresponding to a predetermined frame.

Claims

1. A touch panel comprising:

a display driven by an alternating voltage;

a touch sensor that has touch data read from an input interface of the touch sensor,

a touch data detection part that synchronizes a reading operation of the entire input interface of the touch sensor with a frame of the display and detects the touch data in each frame, wherein the period of the reading operation overlaps a display period in the frame; and

a touch data calculation part that calculates an average of the touch data, from the reading operation of N successive frames, to get a calculated touch data corresponding to a predetermined frame, wherein N is an even number,

wherein the reading operation is an operation to read the touch data from the input interface at least twice during each frame of the N successive frames, and,

wherein the touch data calculation part calculates the average from the touch data that are detected in one of the at least two operations to read the touch data from the input interface during each frame of the N successive frames and that are in the same sequence in each frame of the N successive frames.

2. The touch panel as claimed in claim 1, wherein the reading operation is an operation to sequentially scan each electrode line of a plurality of electrode lines that are arranged in a matrix form to detect the touch data.

3. The touch panel as claimed in claim 1, wherein the touch sensor is an electrostatic capacitive touch sensor.

4. The touch panel as claimed in claim 1, wherein the touch panel is an in-cell touch panel, and the touch sensor is embedded into the display.

5. The touch panel as claimed in claim 1, wherein the touch panel is an on-cell touch panel, and the touch sensor is disposed on the display.

6. The touch panel as claimed in claim 1, wherein the touch sensor is a discrete object formed on a touch sensor glass, wherein the discrete object is disposed on the display.

7. The touch panel as claimed in claim 1, wherein the display is an LCD device.

8. A driving method for a touch panel comprising:

providing a display with an alternating voltage;

reading touch data from an input interface of a touch sensor,

a touch data detection step that synchronizes a reading operation of the entire input interface of the touch sensor with a frame of the display and detects the touch data in each frame, wherein the period of the reading operation overlaps a display period in the frame; and

a touch data calculation step that calculates an average of the touch data, from the reading operation of N successive frames, to get a calculated touch data corresponding to a predetermined frame, wherein N is an even number,

wherein the reading operation is an operation to read the touch data from the input interface at least twice during each frame of the N successive frames, and

wherein at the touch data calculation step the average is calculated from the touch data that are detected in one of the at least two operations to read the touch data from the input interface during each frame of the N successive frames and that are in the same sequence in each frame of the N successive frames.

9. The driving method as claimed in claim 8, wherein the reading operation is an operation to sequentially scan each electrode line of a plurality of electrode lines that are arranged in a matrix form to detect the touch data.

10. The driving method as claimed in claims 8, wherein the touch sensor is an electrostatic capacitive touch sensor.