Liquid crystal display device

• US 9,372,359 B2
• Filed: 06/27/2013
• Issued: 06/21/2016
• Est. Priority Date: 07/02/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Nagami, Takahiro
• Primary Examiner(s): Briggs, Nathanael R
• Assistant Examiner(s): PETERSON, WILLIAM D
• Application Number:
  US13/928,409
• Publication Number:
  US 20140002757A1
• Time in Patent Office: 1,090 Days
• Field of Search: 349/12
• US Class Current: 1/1
• CPC Class Codes: G02F 1/1309 Repairing; Testing
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136263 Line defects
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• 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 3/0443 using a single layer of sensing electrodes

Abstract

To provide a thin liquid crystal display device equipped with the capacitance-type touch panel, and specifically the thin liquid crystal display device with a lower cost and a higher reliability.

The thin liquid crystal display device includes a CF substrate and a TFT substrate formed with a transparent electrode common line, the CF substrate having a plurality of transparent lines, the transparent electrode common line being isolated into a plurality of belt-like forms by an isolation slit, and an area where the transparent line and the transparent electrode common line constitutes an upper electrode and a lower electrode of the capacitance-type touch panel. Furthermore, there are provided a redundant slit and a disconnectable point of the metal common line.

Claims

1. A display device comprising:

a first substrate including first electrodes extending in a first direction, and

a second substrate including a first transparent electrode, a first metal wiring connected to the first transparent electrode, a second transparent electrode, a second metal wiring connected to the second transparent electrode, and scanning lines,

wherein the first transparent electrode and the second transparent electrode extend in a second direction perpendicular to the first direction and overlap with the plurality of first electrodes,

wherein the first metal wiring is electrically connected to the second metal wiring, and

wherein a plurality of scanning lines is overlapped by the first and second transparent electrodes, and a number of the plurality of scanning lines which are overlapped with the first transparent electrode is greater than a number of scanning lines that are overlapped with the second transparent electrode.

2. The display device according to claim 1, wherein a width of the first transparent electrode in the first direction is larger than a width of the second transparent electrode.

3. The display device according to claim 2, wherein an isolation slit is disposed between the first transparent electrode and the second transparent electrode, and the isolation slit extends in the second direction and overlaps with a light shielding layer of the first substrate.

4. The display device according to claim 2, wherein an isolation slit is disposed between the first transparent electrode and the second transparent electrode, and the isolation slit is arranged along one of the scan lines.

5. The display device according to claim 4, wherein the isolation slit has a width of 3 to 10 μ

m.

6. The display device according to claim 1, further comprises pixel electrodes which are disposed between the first transparent electrode and the first substrate.

7. The display device according to claim 6, further comprises liquid crystal layer disposed between the first substrate and the second substrate.

8. The display device according to claim 6, wherein the second transparent electrode is disposed between the first transparent electrode and the first substrate.

9. The display device according to claim 6, wherein the first transparent electrode and the second electrode are common electrodes.