Touch integrated display device

• US 8,792,062 B2
• Filed: 12/27/2011
• Issued: 07/29/2014
• Est. Priority Date: 02/25/2011
• Status: Expired due to Fees

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Hwang, Sangsoo, Kim, Cheolse, Han, Manhyeop
• Primary Examiner(s): Caley, Michael
• Assistant Examiner(s): PAN, JIA X
• Application Number:
  US13/337,401
• Publication Number:
  US 20120218482A1
• Time in Patent Office: 945 Days
• Field of Search: 349/12, 345173-178, 345/104, 178/18.01, 178 1803- 1808
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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

Abstract

The present invention provides a touch integrated display device which reduces a thickness of a display device and can improve touch performance. The touch integrated display device according to one embodiment of the present invention can include: a TFT positioned on a lower substrate; a pixel electrode connected to the TFT; a common electrode facing the pixel electrode to form electric field; a liquid crystal layer positioned on the common electrode; an upper substrate facing the lower substrate which is positioned at both sides of the liquid crystal layer; a driving electrode which is positioned on one side of the upper substrate adjacent to the liquid crystal layer; and a sensing electrode which is positioned on the other side of the upper substrate and faces the driving electrode.

Claims

1. A touch integrated display device, comprising:

a TFT on a lower substrate;

a pixel electrode connected to the TFT;

a common electrode facing the pixel electrode and configured to form an electric field;

a liquid crystal layer on the common electrode;

an upper substrate facing the lower substrate, with the liquid crystal layer therebetween; and

a driving electrode on a first side of the upper substrate directly contacting the liquid crystal layer on an opposite side of the liquid crystal layer from the common electrode,

wherein an upper polarizer, a sensing electrode, an electrode film, an adhesive, and a reinforcing glass plate are sequentially stacked on a second side of the upper substrate, the second side of the upper substrate being opposite to the first side of the upper substrate

wherein the color filters are disposed between the driving electrode and the upper substrate, and

wherein the common electrode is disposed on the lower substrate under the liquid crystal layer.

2. The touch integrated display device of claim 1, wherein:

the upper substrate includes a black matrix.

3. The touch integrated display device of claim 1, wherein a lower polarizer is positioned at a lower surface of the lower substrate.

4. The touch integrated display device of claim 1, wherein a driving method of the liquid crystal layer is an IPS method or a FFS method.