ACTIVE MATRIX SUBSTRATE, DISPLAY DEVICE, TELEVISION APPARATUS, MANUFACTURING METHOD OF AN ACTIVE MATRIX SUBSTRATE, AND MANUFACTURING METHOD OF A DISPLAY DEVICE

• US 20090251615A1
• Filed: 05/19/2006
• Published: 10/08/2009
• Est. Priority Date: 09/22/2005
• Status: Active Grant

• 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
• Granted Patent: US 7,838,881 B2
• Time in Patent Office: Days
• US Class Current: 348/725
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/136263 Line defects
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0465 Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

An active matrix substrate includes: a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel; a plurality of gate lines each provided between the corresponding pixel electrodes and extending in parallel with each other; a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines; a plurality of TFTs provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines; a plurality of capacitor lines each provided between the corresponding gate lines and extending in parallel with each other; and a plurality of second source lines each provided between the corresponding pixel electrodes and extending in parallel with the first source lines.

Claims

1-25. -25. (canceled)

26. An active matrix substrate, comprising:

a plurality of pixel electrodes arranged in a matrix pattern and each defining a pixel;

a plurality of gate lines each provided between the corresponding pixel electrodes and extending substantially in parallel with each other;

a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines;

a plurality of switching elements provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines;

a plurality of capacitor lines each provided between the corresponding gate lines and extending substantially in parallel with each other; and

a plurality of second source lines each provided between the corresponding pixel electrodes and extending substantially in parallel with the first source lines.

27. The active matrix substrate according to claim 26, wherein the first source line and the second source line are connected to each other.

28. The active matrix substrate according to claim 26, wherein each of the capacitor lines is defined by a first capacitor line and a second capacitor line that extend substantially in parallel with each other.

29. The active matrix substrate according to claim 28, wherein the first capacitor line and the second capacitor line are connected to each other.

30. The active matrix substrate according to claim 26, wherein each of the capacitor lines is extended at every pixel so as to have a capacitor line extension portion extending along the capacitor line and having a portion overlapping a corresponding first source line and a portion overlapping a corresponding second source line.

31. The active matrix substrate according to claim 26, wherein capacitor electrodes are arranged so as to overlap the respective capacitor lines with a dielectric film interposed therebetween.

32. The active matrix substrate according to claim 31, wherein an interlayer insulating film is provided between the switching elements and the capacitor electrodes and the pixel electrodes, each of the plurality of switching elements has a drain electrode connected to the corresponding pixel electrode, and the drain electrodes and the capacitor electrodes are connected to the respective pixel electrodes through respective contact holes formed in the interlayer insulating film.

33. The active matrix substrate according to claim 32, wherein the drain electrode is extended and connected to a corresponding capacitor electrode.

34. The active matrix substrate according to claim 26, wherein each of the plurality of pixel electrodes has a slit portion arranged to divide orientation of liquid crystal molecules or a projection arranged to control orientation of liquid crystal molecules, and the slit portion and the projection overlap a corresponding capacitor line.

35. The active matrix substrate according to claim 29, wherein adjacent pixels of the plurality of pixels define a pixel group, and at least two pixels of the pixel group are different in luminance when an image is displayed.

36. The active matrix substrate according to claim 26, wherein each of an area of a region where each of the first source lines overlaps a corresponding capacitor line and an area of a region where each of the second source lines overlaps a corresponding capacitor line is about 25 μ

m² or more.

37. A display device comprising the active matrix substrate of claim 26.

38. A television apparatus comprising the display device of claim 37 and a tuner portion for receiving television broadcasting.

39. A manufacturing method of an active matrix substrate including a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel, a plurality of gate lines each provided between the corresponding pixel electrodes and extending substantially in parallel with each other, a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines, a plurality of switching elements provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines, a plurality of capacitor lines each provided between the corresponding gate lines and extending substantially in parallel with each other, and a plurality of second source lines each provided between the corresponding pixel electrodes and extending substantially in parallel with the first source lines, comprising:

the step of detecting disconnection of a gate line;

the step of forming a source line bypassing portion by cutting each second source line provided along both sides of a pixel electrode of a pixel corresponding to a disconnected location of the gate line detected in the disconnection detecting step at a position located beyond a capacitor line extending across the pixel electrode and a position located beyond the disconnected gate line, so that each source line bypassing portion has a portion overlapping the capacitor line and a portion overlapping the gate line;

the step of forming a capacitor line bypassing portion by cutting the capacitor line extending across the pixel electrode of the pixel corresponding to the disconnected location of the gate line detected in the disconnection detecting step at a position located beyond each second source line provided along both sides of the pixel electrode of the pixel corresponding to the disconnected location, so that the capacitor line bypassing portion has a portion overlapping one of the second source lines and a portion overlapping another second source line; and

the step of connecting the respective portions of the source line bypassing portions overlapping the gate line with the disconnected gate line and connecting the respective portions of the source line bypassing portions overlapping the capacitor line with the capacitor line bypassing portion.

42. The manufacturing method according to claim 39, wherein the cutting and the connection are conducted by laser radiation.

43. The manufacturing method according to claim 42, wherein the cutting is conducted by a fourth harmonic wave of a YAG laser.

44. The manufacturing method according to claim 42, wherein the connection is conducted by a second harmonic wave of a YAG laser.

40. A manufacturing method of an active matrix substrate including a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel, a plurality of gate lines each provided between the corresponding pixel electrodes and extending substantially in parallel with each other, a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines, a plurality of switching elements provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines, a plurality of capacitor lines each provided between the corresponding gate lines and extending in parallel with each other, and a plurality of second source lines each provided between the corresponding pixel electrodes and extending substantially in parallel with the first source lines, comprising:

the step of detecting disconnection of a first source line;

the step of forming a capacitor line bypassing portion by cutting a capacitor line extending across a pixel electrode of a pixel corresponding to a disconnected location of the first source line detected in the disconnection detecting step at positions located outside the disconnected first source line and a second source line adjacent to the first source line, so that the capacitor line bypassing portion has a portion overlapping the first source line and a portion overlapping the second source line; and

the step of connecting the portion of the capacitor line bypassing portion overlapping the first source line with the disconnected first source line and connecting the portion of the capacitor line bypassing portion overlapping the second source line with the second source line.

41. A manufacturing method of an active matrix substrate including a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel, a plurality of gate lines each provided between the corresponding pixel electrodes and extending substantially in parallel with each other, a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines, a plurality of switching elements provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines, a plurality of capacitor lines each provided between the corresponding gate lines and extending in parallel with each other, a plurality of second source lines each provided between the corresponding pixel electrodes and extending substantially in parallel with the first source lines, and a capacitor line extension portion extended from each capacitor line at every pixel so as to extend along the capacitor line and having a portion overlapping a corresponding first source line and a portion overlapping a corresponding second source line, comprising:

the step of detecting disconnection of a capacitor line;

the step of forming a source line bypassing portion by cutting a first source line and a second source line provided along both sides of a pixel electrode of a pixel corresponding to a disconnected location of the capacitor line detected in the disconnection detecting step at a position located beyond the disconnected capacitor line and a position located beyond a capacitor line extension portion extended from the capacitor line, so that each source line bypassing portion has a portion overlapping the capacitor line and a portion overlapping the capacitor line extension portion; and

the step of connecting the respective portions of the source line bypassing portions overlapping the capacitor line with the disconnected capacitor line and connecting the respective portions of the source line bypassing portions overlapping the capacitor line extension portion with the capacitor line extension portion.

45. A manufacturing method of a display device having an active matrix substrate including a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel, a plurality of gate lines each provided between the corresponding pixel electrodes and extending substantially in parallel with each other, a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines, a plurality of switching elements provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines, a plurality of capacitor lines each provided between the corresponding gate lines and extending substantially in parallel with each other, and a plurality of second source lines each provided between the corresponding pixel electrodes and extending substantially in parallel with the first source lines, comprising:

the step of detecting disconnection of a gate line;

the step of forming a source line bypassing portion by cutting each second source line provided along both sides of a pixel electrode of a pixel corresponding to a disconnected location of the gate line detected in the disconnection detecting step at a position located beyond a capacitor line extending across the pixel electrode and a position located beyond the disconnected gate line, so that each source line bypassing portion has a portion overlapping the capacitor line and a portion overlapping the gate line;

the step of forming a capacitor line bypassing portion by cutting the capacitor line extending across the pixel electrode of the pixel corresponding to the disconnected location of the gate line detected in the disconnection detecting step at a position located beyond each second source line provided along both sides of the pixel electrode of the pixel corresponding to the disconnected location, so that the capacitor line bypassing portion has a portion overlapping one of the second source lines and a portion overlapping another second source line; and

the step of connecting the respective portions of the source line bypassing portions overlapping the gate line with the disconnected gate line and connecting the respective portions of the source line bypassing portions overlapping the capacitor line with the capacitor line bypassing portion.

48. The manufacturing method according to claim 45, wherein the cutting and the connection are conducted by laser radiation.

49. The manufacturing method according to claim 48, wherein the cutting is conducted by a fourth harmonic wave of a YAG laser.

50. The manufacturing method according to claim 48, wherein the connection is conducted by a second harmonic wave of a YAG laser.

46. A manufacturing method of a display device having an active matrix substrate including a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel, a plurality of gate lines each provided between the corresponding pixel electrodes and extending substantially in parallel with each other, a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines, a plurality of switching elements provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines, a plurality of capacitor lines each provided between the corresponding gate lines and extending substantially in parallel with each other, and a plurality of second source lines each provided between the corresponding pixel electrodes and extending substantially in parallel with the first source lines, comprising:

the step of detecting disconnection of a first source line;

the step of forming a capacitor line bypassing portion by cutting a capacitor line extending across a pixel electrode of a pixel corresponding to a disconnected location of the first source line detected in the disconnection detecting step at positions located outside the disconnected first source line and a second source line adjacent to the first source line, so that the capacitor line bypassing portion has a portion overlapping the first source line and a portion overlapping the second source line; and

the step of connecting the portion of the capacitor line bypassing portion overlapping the first source line with the disconnected first source line and connecting the portion of the capacitor line bypassing portion overlapping the second source line with the second source line.

47. A manufacturing method of a display device having an active matrix substrate including a plurality of pixel electrodes arranged in a matrix pattern and each forming a pixel, a plurality of gate lines each provided between the corresponding pixel electrodes and extending substantially in parallel with each other, a plurality of first source lines each provided between the corresponding pixel electrodes and extending in a direction crossing an extending direction of the gate lines, a plurality of switching elements provided corresponding to the respective pixel electrodes and connected to the respective pixel electrodes, the respective gate lines, and the respective first source lines, a plurality of capacitor lines each provided between the corresponding gate lines and extending substantially in parallel with each other, a plurality of second source lines each provided between the corresponding pixel electrodes and extending substantially in parallel with the first source lines, and a capacitor line extension portion extended from each capacitor line at every pixel so as to extend along the capacitor line and having a portion overlapping a corresponding first source line and a portion overlapping a corresponding second source line, comprising:

the step of detecting disconnection of a capacitor line;

the step of forming a source line bypassing portion by cutting a first source line and a second source line provided along both sides of a pixel electrode of a pixel corresponding to a disconnected location of the capacitor line detected in the disconnection detecting step at a position located beyond the disconnected capacitor line and a position located beyond a capacitor line extension portion extended from the capacitor line, so that each source line bypassing portion has a portion overlapping the capacitor line and a portion overlapping the capacitor line extension portion; and

the step of connecting the respective portions of the source line bypassing portions overlapping the capacitor line with the disconnected capacitor line and connecting the respective portions of the source line bypassing portions overlapping the capacitor line extension portion with the capacitor line extension portion.