Liquid crystal display device and manufacturing method thereof

• US 9,235,091 B2
• Filed: 03/07/2014
• Issued: 01/12/2016
• Est. Priority Date: 01/08/2014
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Ono, Kikuo
• Primary Examiner(s): Kim, Dennis Y
• Application Number:
  US14/200,035
• Publication Number:
  US 20150192833A1
• Time in Patent Office: 676 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• 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 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/13606 having means for reducing parasitic capacitance
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/136218 Shield electrodes
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio

Abstract

Provided is a liquid crystal display device, including: a first substrate and a second substrate. On the second substrate, a plurality of gate signal lines, a plurality of data signal lines, a plurality of pixel electrodes provided correspondingly to a plurality of pixels, and a common electrode provided so as to be opposed to the pixel electrodes are formed. An interline pitch of the gate signal lines is smaller than an interline pitch of the data signal lines. In each of the pixels, the pixel electrode overlaps, in plan view, gate signal lines adjacent to the pixel electrode.

Claims

1. A liquid crystal display device, comprising:

a first substrate on a display surface side and a second substrate on a rear surface side, the first substrate and the second substrate being placed so as to be opposed to each other with liquid crystal interposed therebetween,

the second substrate comprising;

a plurality of gate signal lines formed thereon, each of which extends in a row direction;

a plurality of data signal lines formed thereon, each of which extends in a column direction;

a plurality of pixel electrodes formed thereon, which are provided correspondingly to a plurality of pixels arranged in the row direction and the column direction; and

a common electrode formed thereon, which is provided on the display surface side so as to be opposed to the plurality of pixel electrodes,

wherein an interline pitch of the plurality of gate signal lines is smaller than an interline pitch of the plurality of data signal lines,

wherein, in each of the plurality of pixels, the pixel electrode in a first pixel overlaps and extends to across, in plan view, both a gate signal line for driving the first pixel and a gate signal line of the plurality of gate signal lines which is scanned next to the gate signal line for driving the first pixel,

wherein, in the each of the plurality of pixels, in plan view, a first overlapping area of the pixel electrode in a first pixel and the gate signal line for driving the first pixel is smaller than a second overlapping area of the pixel electrode in the first pixel and the gate signal line being scanned next to the gate signal line for driving the first pixel, and

wherein the first overlapping area and the second overlapping area are arranged in zigzag.

2. The liquid crystal display device according to claim 1, wherein, in the each of the plurality of pixels, the gate signal line overlaps, in plan view, two of the plurality of pixel electrodes which are adjacent to each other in the column direction.

3. The liquid crystal display device according to claim 1, wherein the plurality of pixel electrodes are formed on an insulating film for covering the plurality of gate signal lines.

4. The liquid crystal display device according to claim 1, further comprising a plurality of colored portions formed on the second substrate, which are arranged correspondingly to the plurality of pixels, respectively,

wherein the plurality of colored portions are arranged so that the colored portions of the same color are arranged in the row direction and the colored portions of different colors are periodically arranged in the column direction.