Active matrix substrate, method for producing active matrix substrate, liquid crystal panel, method for producing liquid crystal panel, liquid crystal display device, liquid crystal display unit, and television receiver

• US 8,976,209 B2
• Filed: 10/30/2009
• Issued: 03/10/2015
• Est. Priority Date: 03/05/2009
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Tsubata, Toshihide
• Primary Examiner(s): MANDEVILLE, JASON M
• Application Number:
  US13/254,791
• Publication Number:
  US 20120001838A1
• Time in Patent Office: 1,957 Days
• Field of Search: 345/694, 345/695, 345/698, 345/87, 345/93
• US Class Current: 345/694
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/134354 the sub-pixels being capacitively coupled
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G09G 2300/0404 Matrix technologies
• CPC Class Codes: G09G 2300/0421 Structural details of the set of electrodes
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: Y10T 29/43 Electric condenser making

Abstract

Disclosed is a liquid crystal panel including a scan signal line (16x), a data signal line (15x), and a transistor (12a) that is connected to the scan signal line (16x) and the data signal line (15x). A pixel (101) is provided with pixel electrodes (17a and 17b). The pixel electrode (17a) is connected to the data signal line (15x) through the transistor (12a). The liquid crystal panel further includes capacitance electrodes (37a and 38a) that are formed in the same layer as the scan signal line (16x). The capacitance electrodes (37a and 38a) are electrically connected to the pixel electrode (17a), and form a capacitance with the pixel electrode (17b). Consequently, the yield of a capacitance coupling type pixel division system active matrix substrate can be improved.

Claims

1. An active matrix substrate, comprising:

a scan signal line;

a data signal line;

a transistor connected to the scan signal line and to the data signal line;

first and second pixel electrodes provided in a single pixel region, said first pixel electrode being connected to said data signal line through said transistor; and

first and second capacitance electrodes formed in a same layer as said scan signal line,

wherein said first capacitance electrode is electrically connected to one of said first and second pixel electrodes, and forms a capacitance with the other of said first and second pixel electrodes,

wherein said second capacitance electrode is electrically connected to one of said first and second pixel electrodes, and forms a capacitance with the other of said first and second pixel electrodes,

wherein at least a portion of said first capacitance electrode overlaps with said other of the first and second pixel electrodes through an interlayer insulating film covering a channel of said transistor and a gate insulating film covering said first capacitance electrode and said scan signal line,

wherein at least a portion of said second capacitance electrode overlaps with said other of the first and second pixel electrodes through the interlayer insulating film covering the channel of said transistor and the gate insulating film covering said second capacitance electrode and said scan signal line,

wherein said first capacitance electrode is connected to said first pixel electrode through a first contact hole running through said interlayer insulating film and said gate insulating film, and overlaps with said second pixel electrode through said interlayer insulating film and said gate insulating film, and

wherein said second capacitance electrode is connected to said first pixel electrode through a second contact hole running through said interlayer insulating film and said gate insulating film, and overlaps with said second pixel electrode through said interlayer insulating film and said gate insulating film.

2. The active matrix substrate according to claim 1, wherein perimeters of said first and second pixel electrodes comprise a plurality of sides, a side of said first pixel electrode and a side of said second pixel electrode are adjacent to each other, and said first and second capacitance electrodes are respectively arranged to overlap with a gap between the two sides adjacent to each other, said first pixel electrode, and said second pixel electrode.

3. The active matrix substrate according to claim 1,

wherein a drain lead-out electrode led out from one of conductive electrodes of said transistor and said first pixel electrode are connected to each other through a third contact hole.

4. The active matrix substrate according to claim 1,

wherein said first capacitance electrode, a drain lead-out electrode led out from one of conductive electrodes of said transistor, and said first pixel electrode are interconnected through a third contact hole running through said interlayer insulating film and said gate insulating film.

5. The active matrix substrate according to claim 1, wherein said first and second pixel electrodes are arranged in a column direction, while the scan signal line extends in a row direction.

6. The active matrix substrate according to claim 5, wherein, among two pixel regions adjacent to each other in the row direction, said first pixel electrode in one of the pixel regions and said second pixel electrode in the other of the pixel regions are adjacent to each other in the row direction.

7. The active matrix substrate according to claim 1, further comprising a storage capacitance wiring that forms a capacitance with said first pixel electrode or a conductive body electrically connected to said first pixel electrode and that forms a capacitance with said second pixel electrode or a conductive body electrically connected to said second pixel electrode.

8. The active matrix substrate according to claim 7, wherein said storage capacitance wiring extends in a same direction as said scan signal line to cross a center of said pixel region.

9. A liquid crystal panel comprising the active matrix substrate set forth in claim 1.

10. A liquid crystal display unit comprising the liquid crystal panel set forth in claim 9 and a driver.

11. A liquid crystal display device comprising the liquid crystal display unit set forth in claim 10 and a light source device.

12. A television receiver comprising the liquid crystal display device set forth in claim 11 and a tuner unit that receives television broadcasting.