Liquid Crystal Display Device With Touch Screen

• US 20120154334A1
• Filed: 02/27/2012
• Published: 06/21/2012
• Est. Priority Date: 11/29/2006
• Status: Active Grant

• Current Assignee: Paneltouch Technologies LLC (Touch Display LLC)
• Original Assignee: Norio Mamba, Tsutomu Furuhashi
• Inventors: Furuhashi, Tsutomu, Mamba, Norio
• Granted Patent: US 9,081,449 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: G09G 2300/0404 Matrix technologies
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: G09G 5/18 Timing circuits for raster scan displays specially adapted for television H04N ; synchronisation between the display unit and other display units, videodisc player G09G5/12

Abstract

A liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal material sandwiched between the first and second substrate. The second substrate has a touch screen electrode directly on a front-side surface of the second substrate. The first substrate has a wiring line for supplying a position detection voltage. A conductive tape electrically connects between the touch screen electrode and a driver circuit. A polarization plate is disposed above the touch screen electrode.

Claims

1. A liquid crystal display device comprising:

a first substrate;

a second substrate; and

a liquid crystal material sandwiched between the first and second substrates;

wherein the second substrate has a touch screen electrode directly on a front-side surface of the second substrate;

wherein the first substrate has a wiring line for supplying a position detection voltage;

wherein a conductive tape electrically connects between the touch screen electrode and a driver circuit; and

wherein a polarization plate is disposed above the touch screen electrode.

2. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is an IPS liquid crystal display device.

3. The liquid crystal display device according to claim 1, wherein the driver circuit includes a coordinate detection circuit.

4. The liquid crystal display device according to claim 1, wherein the touch screen electrode is strip-shaped.

5. A liquid crystal display device comprising:

a first substrate including a comb-shaped pixel electrode and a counter electrode;

a second substrate including a color filter layer; and

a liquid crystal material sandwiched between the first and second substrate;

wherein the second substrate has a touch screen electrode directly on a front-side surface of the second substrate;

wherein the first substrate has a wiring line for supplying a position detection voltage and a terminal which electrically connects the wiring line;

wherein a conductive tape electrically connects between the touch screen electrode and a driver circuit;

wherein the terminal electrically connects between the wiring line and the driver circuit; and

wherein a polarization plate is disposed above the touch screen electrode.

6. The liquid crystal display device according to claim 5, wherein the liquid crystal display device is an IPS liquid crystal display device.

7. The liquid crystal display device according to claim 5, wherein the driver circuit includes a coordinate detection circuit.

8. The liquid crystal display device according to claim 5, wherein the touch screen electrode is strip-shaped.