Touch panel

• US 10,067,621 B2
• Filed: 03/22/2016
• Issued: 09/04/2018
• Est. Priority Date: 03/27/2015
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kimura, Hajime, Yamazaki, Shunpei
• Primary Examiner(s): Sherman, Stephen G
• Application Number:
  US15/077,009
• Publication Number:
  US 20160282990A1
• Time in Patent Office: 896 Days
• Field of Search: 345174
• 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 3/04166 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 3/0445 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

Abstract

A touch panel which is thin, has a simple structure, or is easily incorporated into an electronic device is provided. The touch panel includes a first substrate, a second substrate, a first conductive layer, a second conductive layer, a third conductive layer, a fourth conductive layer, liquid crystal, and an FPC. The first conductive layer has a function of a pixel electrode. The second conductive layer has a function of a common electrode. The third and fourth conductive layers each have a function of an electrode of a touch sensor. The FPC is electrically connected to the fourth conductive layer. The first, second, third, and fourth conductive layers and the liquid crystal are provided between the first and second substrates. The first, second, and third conductive layers are provided over the first substrate. The FPC is provided over the first substrate.

Claims

1. A touch panel comprising:

a first substrate;

a second substrate;

a pixel electrode;

a common electrode;

an electrode of a touch sensor;

liquid crystal; and

an FPC,

wherein the FPC is electrically connected to the electrode of the touch sensor,

wherein the pixel electrode, the common electrode, the electrode of the touch sensor, and the liquid crystal are provided between the first substrate and the second substrate,

wherein the pixel electrode, the common electrode, and the electrode of the touch sensor are provided between the first substrate and the liquid crystal, and

wherein the FPC is provided over the first substrate.

2. The touch panel according to claim 1, further comprising a fourth conductive layer and a connector,

wherein the fourth conductive layer is provided over the first substrate.

3. The touch panel according to claim 1, wherein the first substrate is a flexible substrate.

4. The touch panel according to claim 1,

wherein the pixel electrode and the common electrode are overlapped with each other, and

wherein the pixel electrode and the electrode of the touch sensor are overlapped with each other.