WO2007074556A1 - アクティブマトリクス基板、表示装置、テレビジョン受像機、アクティブマトリクス基板の欠陥修正方法 - Google Patents
アクティブマトリクス基板、表示装置、テレビジョン受像機、アクティブマトリクス基板の欠陥修正方法 Download PDFInfo
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- WO2007074556A1 WO2007074556A1 PCT/JP2006/315030 JP2006315030W WO2007074556A1 WO 2007074556 A1 WO2007074556 A1 WO 2007074556A1 JP 2006315030 W JP2006315030 W JP 2006315030W WO 2007074556 A1 WO2007074556 A1 WO 2007074556A1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/52—Arrangements for conducting electric current within the device in operation from one component to another, i.e. interconnections, e.g. wires, lead frames
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1255—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs integrated with passive devices, e.g. auxiliary capacitors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
- G02F1/136263—Line defects
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136259—Repairing; Defects
- G02F1/136268—Switch defects
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/19—Details of hybrid assemblies other than the semiconductor or other solid state devices to be connected
- H01L2924/1901—Structure
- H01L2924/1904—Component type
- H01L2924/19041—Component type being a capacitor
Definitions
- the present invention relates to an active matrix substrate used for a display device such as a liquid crystal display device.
- FIG. 15 shows a configuration of a conventional active matrix substrate used in a liquid crystal display device.
- the active matrix substrate 100 is formed in the vicinity of the intersection of a plurality of scanning signal lines 116 and a plurality of data signal lines 115 arranged in an intersecting manner and each signal line (115 ⁇ 116).
- a TFTl 12 Thin Film Transistor
- the TFT 112 has its source electrode 119 connected to the data signal line 115 and its drain electrode 108 connected to the pixel electrode 117 via the drain lead electrode 107.
- the scanning signal line 116 also serves as a gate electrode of the TFT 112.
- a hole is formed in the insulating film disposed between the drain extraction electrode 107 and the pixel electrode 117, and thereby, a contact hole 110 that connects the drain extraction electrode 107 and the pixel electrode 117 is formed. Is formed.
- the pixel electrode 117 is a transparent electrode such as ITO, and transmits light (backlight light) under the active matrix substrate.
- TFT 112 turns TFT 112 on (source electrode 119 and drain electrode 108 are in a conductive state), and in this state a data signal (signal voltage) sent to data signal line 115 1S source electrode 119, drain electrode Data is written to the pixel electrode 117 via 108 and the drain extraction electrode 107.
- the storage capacitor (Cs) wiring 118 has a function of avoiding self-discharge of the liquid crystal layer during the OFF period of the TFT 112.
- a short circuit may occur between the source electrode 119 and the drain electrode 108 of the TFT 112 due to foreign matter or film residue.
- a normal voltage drain
- Voltage is not applied and appears as a pixel defect (bright spot or black spot) in the liquid crystal display device! Thereby, the manufacturing yield of the liquid crystal display device is lowered.
- Patent Document 1 Japanese Published Patent Publication “Japanese Unexamined Patent Publication No. 7-199221 (Publication Date: August 4, 1995)”
- the liquid crystal display device described in Patent Document 1 provides redundancy by arranging a plurality of TFTs (active elements) in parallel.
- TFTs active elements
- the parasitic capacitance between the TFT and the scanning signal line increases.
- Such a redundant structure has a problem that when the signal writing frequency is increased as in recent years, the display quality (particularly, moving image display) is lowered.
- the power consumption increases due to an increase in capacitive load, and the aperture ratio decreases because a plurality of TFTs are provided in parallel.
- the present invention has been made in view of the above problems, and an object of the present invention is to correct a TFT defect (for example, a short circuit between a source electrode and a drain electrode) and to cope with high-speed display and consume power.
- An object of the present invention is to provide an active matrix substrate capable of realizing power suppression.
- the active matrix substrate of the present invention is an active matrix substrate including a transistor, a pixel electrode connected to one conduction electrode of the transistor, and a storage capacitor wiring in order to solve the above-described problem.
- the correction wiring and the lead-out wiring are connected through the insulating layer, and the lead-out wiring is connected to the pixel electrode connection portion ( For example, the pixel electrode of the defective pixel is disconnected from the transistor force by disconnecting between the contact hole) and the one conductive electrode, and the pixel electrode is connected to the storage capacitor wiring through the correction wiring and the extraction wiring. Can do. As a result, the pixel electrode of the defective pixel can be dropped to the potential of the storage capacitor wiring. Gatsutsu Thus, when this active matrix substrate is used in, for example, a normally black liquid crystal display device, a pixel (defective pixel) in which an operation failure has occurred is blackened, and this can be made inconspicuous.
- the transistor can be a field effect transistor (including a TFT), and the lead-out wiring can be connected to the drain electrode (the one conduction electrode) of the field effect transistor.
- the lead-out wiring is connected to the pixel electrode by a contact hole formed between a portion overlapping with the correction wiring and one conductive electrode.
- the end of the correction wiring and the end of the lead-out wiring overlap each other.
- the pixel electrode has a notch (or an autopsy part), and at least a part of the notch overlaps with the portion of the lead-out wiring up to the contact hole. In this way, when a malfunction occurs in the transistor, the lead-out wiring can be cut at a portion that overlaps with the cut-out portion (a portion that does not have a pixel electrode thereon), and the cutting process is facilitated. Further, it is preferable that the notch is formed at the edge portion of the pixel electrode.
- the influence of the notch on the display can be minimized.
- the lead-out wiring may be configured to have a through hole where no electrode is formed in the contact hole.
- the original shading part A light transmitting portion can be formed in the contact hole. Therefore, the aperture ratio of the active matrix substrate can be improved.
- the opening of the contact hole has an extended shape that intersects with the piercing portion. In this way, it is possible to realize a contact hole that is strong against misalignment that occurs in the manufacturing process and can sufficiently secure the contact area between the lead-out wiring and the pixel electrode while having a light transmission portion.
- the storage capacitor wiring extends along the data signal line connected to the other conductive electrode of the transistor, and this extended portion overlaps the edge of the pixel electrode. It is preferable. In this way, the electric field between the pixel electrode and the data signal line can be shielded or weakened by the extended portion. Therefore, when this active matrix substrate is applied to a display device, the display quality can be improved.
- the pixel electrode is provided with a slit for controlling the alignment of liquid crystal molecules in which no electrode is formed, and (when viewed from the normal direction of the substrate surface) at least one of the correction wirings. Partial force It is preferable to overlap the liquid crystal molecule alignment control slit.
- the fringe field effect can be enhanced by forming the correction wiring under the slit of the pixel electrode.
- the slit of the pixel electrode functions as a light transmission area (opening)! Since it is a region, it is possible to avoid a decrease in the aperture ratio due to stretching (drawing) of the storage capacitor wiring by forming the correction wiring so as to overlap with the slit.
- the active matrix substrate can be combined with a counter substrate having a liquid crystal molecular alignment control protrusion, and at least a part of the correction wiring overlaps with the liquid crystal molecular alignment control protrusion. It is preferred to be formed.
- the liquid crystal molecular alignment control protrusion By providing the liquid crystal molecular alignment control protrusion on the counter substrate (counter electrode) in this way, it is possible to realize a wide viewing angle when the active matrix substrate is applied to a liquid crystal display device. Can do. Also, the liquid crystal molecular alignment control protrusion functions as a light transmission region (opening), and is a region, so the correction wiring overlaps with the liquid crystal molecular alignment control protrusion. By forming it in this way, it is possible to avoid a decrease in the aperture ratio due to stretching (drawing) of the storage capacitor wiring.
- the pixel electrode is provided with an electrode and is provided with a liquid crystal molecular alignment control slit, and at least a part of the lead-out wiring is controlled by the liquid crystal molecular alignment control. It is preferable to overlap with the slit for use.
- liquid crystal molecular alignment control slit in the pixel electrode as described above, it is possible to realize a wide viewing angle when the active matrix substrate is applied to a liquid crystal display device.
- the slit of the pixel electrode functions as a light transmission region (opening) and is a region
- the aperture ratio of the extraction wiring can be increased by forming the extraction wiring so as to overlap with the slit. Can be avoided.
- the active matrix substrate can be combined with a counter substrate having a liquid crystal molecule alignment control protrusion, and at least a part of the lead-out wiring overlaps with the liquid crystal molecule alignment control protrusion. It is preferred to be formed.
- the liquid crystal molecular alignment control protrusion on the counter substrate (counter electrode) in this way, the wide viewing angle can be realized when the active matrix substrate is applied to a liquid crystal display device. Can do.
- the liquid crystal molecular alignment control projection is a region that does not function as a light transmission region (opening)
- the lead-out wiring light shielding property
- the lead-out wiring can be formed so as to overlap with the liquid crystal molecular alignment control projection. Therefore, it is possible to avoid a decrease in the aperture ratio due to the lead-out wiring.
- the active matrix substrate is an active matrix substrate including a transistor, a pixel electrode connected to one conduction electrode of the transistor, and a storage capacitor wiring.
- the extended portion of the storage capacitor wiring and the lead-out wiring are insulating layers. By providing an overlapping portion that overlaps through the insulating layer, it is possible to express that the extension portion and the lead-out wiring can be connected through the insulating layer.
- the first and second transistors, the first pixel electrode connected to one conduction electrode of the first transistor, and one conduction of the second transistor are provided in each pixel region.
- An active matrix substrate having a second pixel electrode connected to the electrode and first and second storage capacitor lines, wherein the first extraction line is drawn out from one conductive electrode of the first transistor.
- one pixel is divided into two or more sub-pixels, and each sub-pixel is individually driven (so-called multi-pixel driving).
- multi-pixel driving since the display is performed with the total luminance of the sub-pixels, for example, even if one sub-pixel is corrected to become a black spot, the entire pixel does not become a black spot. Therefore, the defective pixel can be made more conspicuous.
- a display device of the present invention includes the active matrix substrate.
- a front television receiver of the present invention includes the display device and a tuner unit that receives a television broadcast.
- the defect correction method for an active matrix substrate is an active matrix substrate that includes a transistor, a pixel electrode connected to one conduction electrode of the transistor, and a storage capacitor wiring.
- a defect correction method for a matrix substrate wherein a bow I lead-out wiring connected to one conduction electrode of the transistor is formed, and the storage capacitor wiring or a correction wiring connected to the holding capacitance wiring is connected to one of the lead-out wirings.
- the lead-out wiring is connected to the pixel electrode through a contact hole, and if the transistor malfunctions, the insulating layer is The lead wire and the storage capacitor wire are connected through the lead wire, and the lead wire is connected to the one conductive electrode and the contour. Characterized in that disconnected at between Tohoru And
- the pixel electrode and the correction wiring are connected via the bow I lead-out wiring, and the pixel electrode of the defective pixel is connected to the storage capacitor wiring. Can be dropped to potential. Therefore, for example, when used in a normally black liquid crystal display device, it is possible to make a pixel (defective pixel) in which a malfunction has occurred become a black spot and make it inconspicuous.
- the disconnection is preferably performed at a position overlapping the edge portion of the pixel electrode. In addition, it is preferable to form a notch in the pixel electrode so as to overlap with the location where the disconnection is performed.
- the position force for performing the above disconnection is the slit for controlling the liquid crystal molecule alignment. It is preferable to form the lead-out wiring so as to overlap with the wiring. In this way, the disconnection process is easy.
- the pixel electrode and the storage capacitor wiring can be connected via the correction wiring and the extraction wiring.
- a pixel with defective operation defective pixel
- a yield can be improved.
- an increase in capacitive load can be significantly suppressed as compared with the conventional configuration in which active elements are arranged in parallel. As a result, it is possible to cope with high-speed driving, and an unnecessary increase in power consumption can be avoided.
- FIG. 1 is a plan view showing a configuration of an active matrix substrate according to the present embodiment.
- FIG. 2 is a cross-sectional view showing the structure of the active matrix substrate.
- FIG. 3 is a cross-sectional view showing the structure of the active matrix substrate.
- FIG. 4 is a plan view showing a configuration of an active matrix substrate (after defect correction) according to the present embodiment.
- FIG. 5 is a plan view showing a configuration example of the active matrix substrate.
- FIG. 6 is a plan view showing a configuration example of the present active matrix substrate.
- FIG. 7 is a plan view showing a configuration example of the present active matrix substrate.
- FIG. 8 is a plan view showing a configuration example of the active matrix substrate.
- FIG. 9 is a plan view showing a configuration example of the present active matrix substrate.
- FIG. 10 is a cross-sectional view of a liquid crystal panel including the present active matrix substrate.
- FIG. 11 is a block diagram showing a configuration of a liquid crystal display device according to the present embodiment.
- FIG. 12 is a block diagram showing a configuration of a television receiver according to the present embodiment.
- FIG. 13 is a perspective view showing a configuration of a television receiver according to the present embodiment.
- FIG. 14 is a plan view showing a configuration example of the present active matrix substrate.
- FIG. 15 is a plan view showing a configuration of a conventional active matrix substrate.
- FIG. 1 is a perspective plan view (from the back side of the substrate) showing the configuration of the active matrix substrate according to the present embodiment.
- the active matrix substrate 10 has a plurality of scanning signal lines 16 formed in the left-right direction in the figure so as to be orthogonal to each other and data signals formed in the up-down direction in the figure.
- TFT12 Thin Film
- the TFT 12 has its source electrode 9 connected to the data signal line 15 and its drain electrode 8 connected to the pixel electrode 17 via the drain lead wiring 7 (lead wiring).
- the scanning signal line 16 also serves as the gate electrode of the TFT12. This TFT on-gate structure can improve the aperture ratio.
- the pixel electrode 17 is a transparent electrode such as ITO, and transmits light (backlight) from the active matrix substrate 10.
- the TFT 12 is turned on (the source electrode 9 and the drain electrode 8 are in a conductive state) by the scanning signal (gate ON voltage) sent to the scanning signal line 16, and in this state, the data signal A data signal (signal voltage) sent to the line 15 is written to the pixel electrode 17 via the source electrode 9, the drain electrode 8 and the drain lead wiring 7.
- the scanning signal gate ON voltage
- the data signal A data signal signal (signal voltage) sent to the line 15 is written to the pixel electrode 17 via the source electrode 9, the drain electrode 8 and the drain lead wiring 7.
- the pixel electrode 17 is provided with a slit (liquid crystal molecule alignment control slit) 55 for controlling the alignment of liquid crystal molecules in a horizontal V shape (a shape obtained by rotating the V shape by 90 degrees).
- a slit liquid crystal molecule alignment control slit
- This is a configuration used for an MVA (Multi-Domes in Vertical Alignment) system used for a large liquid crystal TV or the like for the purpose of wide viewing angle (see, for example, JP-A-2001-83523).
- a slit electrode cutting pattern
- rib liquid crystal molecular alignment control protrusion
- the alignment direction of the liquid crystal molecules can be dispersed in a plurality of directions, and a wide viewing angle is realized.
- a belt-like shape bent in a zigzag manner with a certain period can be considered.
- the storage capacitor (Cs) wiring 18 is formed so as to cross the pixel electrode 17 orthogonal to the data signal line 15 (parallel to the scanning signal line 16) in FIG.
- a correction wiring 19 is drawn out from the storage capacitor wiring 18, and a storage capacitor wiring extending portion 20 is extended.
- the correction wiring 19 is drawn obliquely from the middle of the storage capacitor wiring 18 (near the lower center of the pixel electrode 17), and its end portion is an overlapping portion 57. In this overlapping portion 57, the end portion of the drain lead wiring 7 and the end portion of the correction wiring 19 are overlapped.
- the storage capacitor wiring extension 20 straddles the edge of the pixel electrode 17 along the data signal line 15 (a part of the storage capacitor wiring extension 20 overlaps the pixel electrode 17 and the other part does not overlap). Is formed.
- a storage capacitor is formed by the storage capacitor wiring 18 and the pixel electrode 17 and the (interlayer) insulating film located between them, and the storage capacitor wiring extending portion 20 and the pixel electrode 17 are both A storage capacitor is formed by the (interlayer) insulating film positioned between them. A storage capacitor is also formed by the correction wiring 19, the pixel electrode 17, and the (interlayer) insulating film located between them. These storage capacitors function as auxiliary capacitors for holding the potential written in the pixel electrode 17 until the next data signal is input to the pixel electrode 17.
- the correction wiring 19 is used for correcting TFT defects (described in detail later), and the storage capacitor wiring extending portion 20 is used for the electric field between the data signal line 15 and the pixel electrode 17. Used for shielding or reduction.
- correction wiring 19 is obliquely drawn from the storage capacitor wiring 18 because the liquid crystal molecular orientation provided on the correction wiring 19 and the counter substrate (counter electrode) of the active matrix substrate 10. This is for superimposing the control protrusions (ribs).
- rib control protrusions
- the drain lead-out wiring 7 includes a contact region C1.C2 between the overlapping portion 57 (one end portion) and the drain electrode 8 (the other end portion).
- a contact hole 11a is formed in the contact region C1, and the drain lead wiring 7 and the pixel electrode 17 are connected in the contact hole 11a.
- a contact hole l ib is formed in the contact region C2, and the drain lead-out wiring 7 and the pixel electrode 17 are formed in the contact hole l ib.
- the drain lead-out wiring 7 is also formed so as to overlap with the liquid crystal molecular orientation control protrusion (rib) of the counter substrate (counter electrode) described above. In this way, by forming the light-shielding drain lead wiring 7 under the same light-shielding rib, it is possible to avoid a decrease in the aperture ratio due to the drain lead wiring 7. In addition, light leakage can be prevented.
- FIG. 2 is a cross-sectional view of the TFT 12 of FIG.
- a scanning signal line 16 that also serves as a gate electrode is formed on a glass substrate 60, and a gate insulating film 23 is formed on the gate electrode.
- a semiconductor layer (i layer) 50 is formed on the gate insulating film 23, and a drain electrode 8 and a source electrode 9 are formed on the semiconductor layer 50.
- a drain lead wiring 7 is formed on the drain electrode 8, and a data signal line 15 is formed on the source electrode 9.
- a passivation film 26 is formed on the drain lead wiring 7, between the drain electrode 8 and the source electrode 9, and on the data signal line 15.
- the area of the overlapping portion 57 As described above, by setting the area of the overlapping portion 57 to about 200 ⁇ m 2 , a sufficient laser irradiation region can be obtained when the insulating film is melted with an yttrium aluminum gannet (YAG) laser or the like. Therefore, the reliability of the conduction between the correction wiring 19 and the drain lead-out wiring 7 can be improved.
- the area of the overlapped area varies due to the alignment deviation in the photolithographic process, the YAG laser irradiation beam diameter expands during laser irradiation, and the melting point of the correction wiring 19 and drain lead wiring 7 after laser irradiation taper. In view of the shape of the film to be formed, it is more preferable to increase the area of the overlapping portion to some extent, and more specifically, it is more preferably 400 ⁇ m 2 or more.
- FIG. 4 shows the active matrix substrate after correcting the TFT 12 as having a defect.
- drain lead wiring 7 is disconnected between drain electrode 8 and contact hole 1 lb, and gate insulating film 23 (see FIG. 3) is formed at overlapping portion 57.
- the correction wiring 19 and the drain lead-out wiring 7 are made conductive.
- the correction wiring 19 and the pixel electrode 17 are electrically connected to each other through a part 7r of the drain I discharge wiring and the contact hole 1 la ⁇ 1 lb.
- a gate electrode connected to the scanning signal line 16 is provided on a transparent insulating substrate 60 such as glass or plastic.
- the scanning signal line 16 functions as a gate electrode of the TFT 12.
- the scanning signal line 16 (gate electrode) is made of a metal film such as titanium, chromium, aluminum, molybdenum, tantalum, tungsten, copper, an alloy film thereof, or a laminated film thereof having a film thickness of 1000 A to 3000 A. The film is formed by this method, and this is patterned into a required shape by a photoetching method or the like.
- the gate insulating film 23 is provided so as to cover the scanning signal line 16 (gate electrode), the storage capacitor wiring 18, the correction wiring 19, and the storage capacitor wiring extending portion 20. .
- the gate insulating film 23 is formed of an insulating film such as silicon nitride or silicon oxide.
- a high-resistance semiconductor layer 50 having an amorphous silicon or polysilicon force is provided on the scanning signal line 16 (gate electrode) so as to overlap the scanning signal line 16 (gate electrode).
- the source electrode 9 and the drain electrode 8 A low-resistance semiconductor layer such as n + amorphous silicon doped with an impurity such as phosphorus is provided.
- the data signal line 15 and the drain lead wiring 7 are formed by the same process.
- the data signal line 15 and the drain lead-out wiring 7 are made of a metal film such as titanium, chromium, aluminum, molybdenum, tantalum, tungsten, copper, an alloy film thereof, or a laminated film thereof having a thickness of 1000 A to 3000 A.
- the film is formed by a method such as sputtering, and a pattern is formed in a necessary shape by a photo etching method or the like.
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US12/097,796 US7583354B2 (en) | 2005-12-26 | 2006-07-28 | Active matrix substrate, display device, television receiver, and method for repairing defects of active matrix substrate |
KR1020107000190A KR100962794B1 (ko) | 2005-12-26 | 2006-07-28 | 액티브 매트릭스 기판, 액정 패널, 액정 표시 장치 및 tv 수상기 |
JP2007551852A JP4364925B2 (ja) | 2005-12-26 | 2006-07-28 | アクティブマトリクス基板、液晶パネル、液晶表示装置、テレビジョン受像機 |
US12/240,179 US7880857B2 (en) | 2005-12-26 | 2008-09-29 | Active matrix substrate, display device, television receiver, and method for repairing defects of active matrix substrate |
US12/570,296 US8045076B2 (en) | 2005-12-26 | 2009-09-30 | Active matrix substrate, display device, television receiver, and method for repairing defects of active matrix substrate |
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JP2005-373485 | 2005-12-26 | ||
JP2005373485 | 2005-12-26 |
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US12/097,796 A-371-Of-International US7583354B2 (en) | 2005-12-26 | 2006-07-28 | Active matrix substrate, display device, television receiver, and method for repairing defects of active matrix substrate |
US12/240,179 Continuation US7880857B2 (en) | 2005-12-26 | 2008-09-29 | Active matrix substrate, display device, television receiver, and method for repairing defects of active matrix substrate |
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PCT/JP2006/315030 WO2007074556A1 (ja) | 2005-12-26 | 2006-07-28 | アクティブマトリクス基板、表示装置、テレビジョン受像機、アクティブマトリクス基板の欠陥修正方法 |
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US (3) | US7583354B2 (ja) |
JP (4) | JP4364925B2 (ja) |
KR (3) | KR100962794B1 (ja) |
CN (2) | CN101866085B (ja) |
WO (1) | WO2007074556A1 (ja) |
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JP2018514801A (ja) * | 2015-03-25 | 2018-06-07 | 深▲セン▼市華星光電技術有限公司 | 液晶表示装置、液晶ディスプレー及びその製造方法、暗点化方法 |
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JP2018159952A (ja) * | 2007-07-26 | 2018-10-11 | 株式会社半導体エネルギー研究所 | 液晶表示装置 |
JP2021036318A (ja) * | 2007-07-26 | 2021-03-04 | 株式会社半導体エネルギー研究所 | 液晶表示装置 |
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US10586811B2 (en) | 2009-02-20 | 2020-03-10 | Semiconductor Energy Laboratory Co., Ltd. | Thin film transistor, method for manufacturing the same, and semiconductor device |
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JP2018514801A (ja) * | 2015-03-25 | 2018-06-07 | 深▲セン▼市華星光電技術有限公司 | 液晶表示装置、液晶ディスプレー及びその製造方法、暗点化方法 |
Also Published As
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US7880857B2 (en) | 2011-02-01 |
KR20080087839A (ko) | 2008-10-01 |
JP2009048189A (ja) | 2009-03-05 |
KR100962794B1 (ko) | 2010-06-10 |
JP4191240B1 (ja) | 2008-12-03 |
JP2009169436A (ja) | 2009-07-30 |
US7583354B2 (en) | 2009-09-01 |
KR20100010950A (ko) | 2010-02-02 |
KR20100010949A (ko) | 2010-02-02 |
JP5154503B2 (ja) | 2013-02-27 |
JPWO2007074556A1 (ja) | 2009-06-04 |
CN101346751A (zh) | 2009-01-14 |
CN101866085B (zh) | 2012-07-25 |
KR100962795B1 (ko) | 2010-06-10 |
KR100962793B1 (ko) | 2010-06-10 |
JP4364925B2 (ja) | 2009-11-18 |
US20100020282A1 (en) | 2010-01-28 |
JP2009053714A (ja) | 2009-03-12 |
CN101866085A (zh) | 2010-10-20 |
US8045076B2 (en) | 2011-10-25 |
JP4927063B2 (ja) | 2012-05-09 |
US20090153758A1 (en) | 2009-06-18 |
US20090066867A1 (en) | 2009-03-12 |
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