DISPLAY PANEL WITH TOUCH DETECTION FUNCTION, DRIVE CIRCUIT, AND ELECTRONIC UNIT

• US 20120262389A1
• Filed: 03/15/2012
• Published: 10/18/2012
• Est. Priority Date: 04/13/2011
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kida, Yoshitoshi, Noguchi, Koji, Mizuhashi, Hiroshi, Azumi, Kohei
• Granted Patent: US 9,851,824 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2217/96031 Combination of touch switch and LC display

Abstract

There are provided a display panel with a touch detection function, a drive circuit, and an electronic unit, which make it possible to realize many functions related to touch detection. The display panel includes: one or more display elements; one or more drive electrodes extending in one direction; an electrode drive section integrated into a chip, and applying a drive signal to the drive electrodes; and one or more touch detection electrodes extending in a direction intersecting the direction in which the drive electrodes extend.

Claims

1. A display panel with a touch detection function, the display panel comprising:

one or more display elements;

one or more drive electrodes extending in one direction;

an electrode drive section integrated into a chip, and applying a drive signal to the drive electrodes; and

one or more touch detection electrodes extending in a direction intersecting the direction in which the drive electrodes extend.

2. The display panel according to claim 1, further comprising

a display drive section driving the display elements,

wherein the display drive section is integrated together with the electrode drive section.

3. The display panel according to claim 2, wherein the electrode drive section applies a drive signal to the drive electrodes, based on a display synchronization signal supplied from the display drive section.

4. The display panel according to claim 3, further comprising

a touch-detection control section controlling touch detection operation,

wherein the touch-detection control section generates a touch-detection synchronization signal based on the display synchronization signal, and

the electrode drive section applies the drive signal to the drive electrodes, based on the touch-detection synchronization signal.

5. The display panel according to claim 4, wherein the touch-detection control section is integrated together with the electrode drive section.

6. The display panel according to claim 1, wherein a capacitance is formed between each of the drive electrodes and each of the touch detection electrodes, and

a detection signal according to the drive signal applied to the drive electrodes is outputted from the touch detection electrode.

7. The display panel according to claim 1, wherein the electrode drive section performs scanning by sequentially selecting one or more electrodes to be driven out of the drive electrodes, and applies the drive signal to the electrode to be driven.

8. The display panel according to claim 7, wherein the electrode drive section has a plurality of scanning modes whose methods of sequentially selecting the electrode to be driven are different from each other.

9. The display panel according to claim 2, further comprising

a power control section controlling power supply to the electrode drive section and the display drive section, and integrated together with the electrode drive section.

10. A display panel with a touch detection function, the display panel comprising:

one or more display elements;

one or more touch detection elements; and

a drive section integrated into a chip, and driving the one or more touch detection elements.

11. A drive circuit comprising:

a display drive section driving one or more display elements; and

an electrode drive section integrated into a chip, and applying a drive signal to one or more drive electrodes that extend in a direction intersecting a direction in which one or more touch detection electrodes extend.

12. An electronic unit including a display panel with a touch detection function and a control section performing operation control using the display panel, the display panel comprising:

one or more display elements;

one or more drive electrodes extending in a direction;

an electrode drive section integrated into a chip, and applying a drive signal to the drive electrodes; and

one or more touch detection electrodes extending in a direction intersecting the direction in which the drive electrodes extend.