US20130120703A1 - Liquid crystal display and a defect correcting method for the same - Google Patents
Liquid crystal display and a defect correcting method for the same Download PDFInfo
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- US20130120703A1 US20130120703A1 US13/733,391 US201313733391A US2013120703A1 US 20130120703 A1 US20130120703 A1 US 20130120703A1 US 201313733391 A US201313733391 A US 201313733391A US 2013120703 A1 US2013120703 A1 US 2013120703A1
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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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
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
- G02F2201/506—Repairing, e.g. with redundant arrangement against defective part
- G02F2201/508—Pseudo repairing, e.g. a defective part is brought into a condition in which it does not disturb the functioning of the device
Definitions
- the present invention relates to a liquid crystal display and a defect correcting method for the same, and more specifically relates to a liquid crystal display adopting a pixel division method and a defect correcting method for the same.
- a liquid crystal display has excellent characteristics such as high definition, thinness, lightness and low power consumption.
- the liquid crystal display is rapidly expanding its market in accordance with an improvement in production capacity, an improvement in price competition with other displays, and the like.
- Japanese Patent Application Unexamined Publication No. 2004-78157 discloses a liquid crystal display provided with an active matrix array substrate adopting a pixel division method in which each pixel electrode includes an assembly of a plurality of sub-pixel electrodes.
- FIG. 13 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a conventional liquid crystal display.
- a pixel electrode 101 on an active matrix array substrate 100 is split into sub-pixel electrodes 103 a and 103 b interposing a gate line 102 therebetween.
- a source line 104 In the vicinity of an intersection portion 105 of the gate line 102 and a source line 104 , separate thin film transistors (TFTs) 106 a and 106 b which are driven by the common gate line 102 and the common source line 104 are provided, and the TFTs 106 a and 106 b are electrically connected to their corresponding sub-pixel electrodes 103 a and 103 b.
- TFTs thin film transistors
- the common gate line 102 and the common source line 104 are used to drive the sub-pixel electrodes 103 a and 103 b via the separate TFTs 106 a and 106 b.
- SG leak a leak 107 a (hereinafter referred to as the “SG leak”) is developed in the TFT 106 a between the gate line 102 and the source line 104 , and a correction for the SG leak 107 a is performed using a correcting device such as a laser, it is necessary to cut the source line 104 at cut sections 108 a and 108 b to completely isolate the SG leak 107 a from the source line 104 . Consequently, even if the leak is developed only in the TFT 106 a , the sub-pixel electrode 103 b driven by the TFT 106 b is unintentionally made defective.
- each pixel electrode includes the assembly of the plurality of sub-pixel electrodes
- a whole pixel unintentionally results in a defective pixel (for example, if the liquid crystal display uses a normally black mode, the defective pixel is observed as a full black dot of a whole pixel).
- preferred embodiments of the present invention provide a liquid crystal display adopting a pixel division method by which the size of a defect can be made smaller than conventional, and also provide a defect correcting method for the liquid crystal display.
- a liquid crystal display is provided with an active matrix array substrate including a plurality of gate lines and a plurality of source lines disposed on a transparent substrate to intersect with each other, and a plurality of pixel electrodes arranged in a matrix, each of the pixel electrodes including an assembly of a plurality of sub-pixel electrodes, separate active elements respectively connected to the sub-pixel electrodes in the vicinity of an intersection portion of the gate line and the source line, the active elements being driven by the common gate line and the common source line, and at least one opening portion being formed in a lower-layer side line placed in a lower layer at the intersection portion of the gate line and the source line.
- the lower-layer side line is the gate line
- an upper-layer side line which is placed in an upper layer of the lower-layer side line is the source line
- an additional source line being partially connected to and extending along the source line is further included, or that a bypass line being connected to the source line at the intersection portion is included.
- the opening portion does not include an electrode layer and/or a semiconductor layer.
- a defect correcting method for a liquid crystal display is a defect correcting method for the above liquid crystal display, and includes at least the steps of cutting the upper-layer side line passing above the opening portion, and cutting a line including a defective section in the cut line so as to disconnect the defective section.
- the liquid crystal display as mentioned above is provided with the active matrix array substrate in which the separate active elements, which are driven by the common gate line and the common source line, are respectively connected to their corresponding sub-pixel electrodes in the vicinity of the intersection portion of the gate line and the source line, and the opening portion is formed in the lower-layer side line at the intersection portion of the gate line and the source line.
- the upper-layer side line passing above the opening portion can be easily cut by using a correcting mechanism such as a laser. If a line including the defective section in the cut line is cut, the defective section can be completely isolated from the line.
- the defect can be observed as a defective pixel of a sub-pixel, not as a defective pixel of a whole pixel.
- the size of the defective pixel is made smaller than conventional, leading to no defects. Consequently, when the active matrix array substrate is used especially in a comparatively large liquid crystal display and the like, advantages achieved include an improvement in display quality due to the reduction of the number of defects, an improvement in production efficiency (yields), and the like.
- the advantages described above can be obtained without making the correction using the auxiliary line. Therefore, there is an advantage that hours of work required for defect correction can be reduced to further improve the production efficiency of the liquid crystal display.
- the opening portion does not include the electrode layer and/or the semiconductor layer, there are advantages that a leak by the electrode layer and a cut piece produced during the line cutting by using the correcting mechanism such as the laser is not developed, and correction can be easily made.
- the defect correcting method for the liquid crystal display by cutting the upper-layer side line passing above the opening portion, a judgment on whether the defective section is present in a line on an input-end side of the cut section or in a line on an open-end side of the cut section can be easily made through image display after the line cutting, and the defective section can be isolated from the line by cutting the line including the defective section.
- the defect correcting method has an advantage of allowing for reliable correction.
- FIG. 1 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a first preferred embodiment of the present invention.
- FIGS. 2A and 2B are schematic diagrams showing a placement relationship between slits formed in the pixel electrode (sub-pixel electrodes) and ribs formed on a common electrode in the liquid crystal display according to the first preferred embodiment (in a multi-domain vertical alignment (MVA) mode).
- VMA multi-domain vertical alignment
- FIGS. 3A and 3B are views showing positions of an SG leak which is developed in thin film transistors (TFTs) on the active matrix array substrate provided in the liquid crystal display according to the first preferred embodiment of the present invention.
- TFTs thin film transistors
- FIG. 4 is a schematic diagram showing an image observed from a transparent substrate side of the active matrix array substrate when the SG leak shown in FIG. 3 is developed.
- FIGS. 5A and 5B are views for explaining steps for making correction using an auxiliary line by cutting a source line above an opening portion, and then cutting a source line on an input side or a source line on a non-input side to isolate the SG leak.
- FIGS. 6A and 6B are schematic diagrams showing images observed from the transparent substrate side of the active matrix array substrate when the source line above the opening portion is cut.
- FIGS. 7A and 7B are schematic diagrams showing images observed from the transparent substrate side of the active matrix array substrate when the source line on the input side or the source line of the non-input side is cut to isolate the SG leak.
- FIGS. 8A and 8B are schematic diagrams showing images observed from the transparent substrate side of the active matrix array substrate when the correction using the auxiliary line is made.
- FIG. 9 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a second preferred embodiment of the present invention.
- FIGS. 10A and 10B are views for explaining steps of cutting a source line above an opening portion, and then cutting a source line on an input side or a source line on a non-input side to isolate an SG leak in the liquid crystal display according to the second preferred embodiment of the present invention.
- FIG. 11 is a schematic view showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a third preferred embodiment of the present invention.
- FIGS. 12A and 12B are views for explaining steps of cutting a source line above an opening portion, and then cutting a source line on an input side or a source line on a non-input side to isolate an SG leak in the liquid crystal display according to the third preferred embodiment of the present invention.
- FIG. 13 is a schematic diagram showing an electrode substrate formed on an active matrix array substrate provided in a conventional liquid crystal display.
- FIG. 14 is a view for explaining a defect correcting method when an SG leak is developed in any one of TFTs in the conventional liquid crystal display.
- the liquid crystal display is a device in which at least a driving circuit which controls alignment of liquid crystals based on an external signal is attached to a liquid crystal panel in which the liquid crystals are sealed in between an active matrix array substrate having at least a plurality of pixel electrodes and a plurality of active elements on a transparent substrate and a substrate having at least a common electrode for the plurality of pixel electrodes on a transparent common substrate opposed to the transparent substrate, where information can be displayed by conducting optical modulation.
- the liquid crystal display is characterized in that the active matrix array substrate has a new structure. Accordingly, the structure of the active matrix array substrate provided in the liquid crystal display according to the preferred embodiments of the present invention will be mainly described hereinafter.
- the defect correcting method for the liquid crystal display according to a preferred embodiment of the present invention is a method for correcting a defect by utilizing the new structure of the active matrix array substrate provided in the liquid crystal display according to a preferred embodiment of the pre sent invention. Therefore, the defect correcting method will be described with respect to each of liquid crystal displays according to preferred embodiments of the present invention.
- FIG. 1 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a first preferred embodiment of the present invention.
- a transparent substrate (unillustrated) constituting the active matrix array substrate 1 On a transparent substrate (unillustrated) constituting the active matrix array substrate 1 , a plurality of gate lines 2 extending in a row direction are formed, and a plurality of source lines 3 extending in a column direction are formed while intersecting at right angles with the gate lines 2 via an insulating layer (unillustrated).
- the gate line 2 shown in FIG. 1 is the n th one
- the source line 3 shown in FIG. 1 is the m th one.
- the gate line 2 is a lower-layer side line
- the source line 3 is an upper-layer side line.
- a pixel electrode 4 is split into two sub-pixel electrodes 5 a and 5 b interposing the gate line 2 therebetween.
- TFTs thin film transistors
- the TFTs 7 a and 7 b are on/off controlled by a scanning signal voltage provided by gate electrodes 8 a and 8 b connected to the common gate line 2 .
- a display signal voltage provided by source electrodes 9 a and 9 b connected to the common source line 3 is provided to the sub-pixel electrodes 5 a and 5 b via drain lines 11 a and 11 b extending from drain electrodes 10 a and 10 b.
- auxiliary capacitance electrodes 13 a and 13 b portions opposed to auxiliary capacitance lines 12 a and 12 b , which are placed parallel to the gate line 2 , via the insulating layer (unillustrated) function as auxiliary capacitance electrodes 13 a and 13 b .
- auxiliary capacitance lines 12 a and 12 b portions opposed to the auxiliary capacitance electrode 13 a and 13 b via the insulating layer function as auxiliary capacitance common electrodes 14 a and 14 b.
- the opening portion 15 does not include an electrode layer and/or a semiconductor layer and the like. In other words, it is preferable that the opening portion 15 does not include constituent elements other than the upper-layer side line.
- the opening portion 15 does not include the electrode layer and/or the semiconductor layer, a leak and the like by a cut piece and the electrode layer are hard to be developed at the time of cutting a line using a correcting mechanism such as a laser, and correction can be easily made.
- the electrode layer and the semiconductor layer include ITO, an n + /i layer and the like for the upper layer.
- slits 16 portions which do not include the electrode layer
- ribs 18 are formed on the common electrode 17 , as schematically shown in FIGS. 2A and 2B , and nematic liquid crystals having negative dielectric anisotropy are used as liquid crystals 19 .
- liquid crystal molecules are aligned in multiple directions by the action of the slits 16 and the ribs 18 at the time of application of an electric field, so that a favorable wide viewing angle can be obtained.
- FIGS. 3A to 8B Next, a defect correcting method for the liquid crystal display according to the first preferred embodiment will be described referring to FIGS. 3A to 8B .
- the source line 3 being the upper-layer side line passing above the opening portion 15 is cut at a cut section 22 from the transparent substrate side by using the correcting mechanism such as the laser, and the observation by lighting of the liquid crystal panel is made again.
- the SG leak 20 a in the TFT 7 a on an input-end side (hereinafter referred to as the “input side”) of the cut section 22 of the source line 3 is developed as shown in FIG. 5A , the cross defect 21 is still observed as shown in FIG. 6A .
- the SG leak 20 b in the TFT 7 b on an open-end side (hereinafter referred to as the “non-input side”) of the cut section 22 of the source line 3 is developed as shown in FIG. 5B , a line defect 21 a in the direction of the gate line 2 disappears and a line defect 21 b in the direction of the source line 3 is observed as shown in FIG. 6B .
- the source line 3 a on the input side is cut at a cut section 23 a to completely isolate the SG leak 20 a from the source line 3 .
- the line defect 21 a in the direction of the gate line 2 disappears, and the line defect 21 b in the direction of the source line 3 is observed, as shown in FIG. 7A .
- the source line 3 b on the non-input side is cut at a cut section 23 b to completely isolate the SG leak 20 b from the source line 3 .
- the line defect 21 b in the direction of the source line 3 is still observed as shown in FIG. 7B .
- sub-pixels pixels (pixels) (unillustrated) arranged on the non-input side of the sub-pixel (the sub-pixel electrode 5 b ) can be driven.
- the defective pixel is observed as not a full black dot of a whole pixel but a half black dot 24 a or 24 b of a sub-pixel as shown in FIGS. 8A and 8B .
- the defective pixel is observed as a half bright dot of a sub-pixel, and by performing processing such as forming it into a black dot, the defective pixel is observed as a half black dot 24 a or 24 b of a sub-pixel.
- the size of the defective pixel is made smaller than conventional, leading to a state of no defect (a normal level in view of display quality can be attained), so that quality of the liquid crystal display is improved.
- an auxiliary line (unillustrated) is placed in a peripheral portion of a display region on the active matrix array substrate 1 so as to extend completely around or extend half-way around the display region, and an input end and an open end of the source line 3 are short-circuited by the auxiliary line.
- FIG. 9 is a schematic view showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a second preferred embodiment of the present invention.
- the structure of the active matrix array substrate 30 provided in the liquid crystal display according to the second preferred embodiment is basically the same as the structure of the active matrix array substrate 1 provided in the liquid crystal display according to the first preferred embodiment except for the source line 3 . Therefore, differences from the liquid crystal display and the defect correcting method for the same according to the first preferred embodiment will be mainly described hereinafter.
- an additional source line 32 is further included while being partially connected to the source line 3 via connecting portions 31 and extending along the source line 3 .
- the source line 3 being the upper-layer side line passing above the opening portion 15 is cut at the cut section 22 from the transparent substrate side by using the correcting mechanism such as the laser for correcting the SG leak 20 a or the SG leak 20 b.
- a judgment on which of the SG leak 20 a in the TFT 7 a or the SG leak 20 b in the TFT 7 b is developed can be easily made based on an image viewed from the transparent substrate side. Then, if the SG leak 20 a in the TFT 7 a is developed as shown in FIG. 10A , the source line 3 a on the input side is cut at the cut section 23 a to completely isolate the SG leak 20 a from the source line 3 .
- the active matrix array substrate 30 provided in the liquid crystal display according to the second preferred embodiment has the additional source line 32 , a source signal S from the input side is inputted to the TFT 7 b via the additional source line 32 . Accordingly, the sub-pixel (the sub-pixel electrode 5 b ) can be driven without making the correction using the auxiliary line.
- the source line 3 b on the non-input side is cut to completely isolate the SG leak 20 b from the source line 3 .
- the source signal S from the input side is supplied also to the non-input side via the additional source line 32 .
- the sub-pixels (pixels) placed on the non-input side of the sub-pixel (the sub-pixel electrode 5 b ) can be driven without making the correction using the auxiliary line.
- the defect can be observed as a defective pixel of a sub-pixel, not as a defective pixel of a whole pixel, and the size of the defective pixel is made smaller than conventional, leading to no defects.
- FIG. 11 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to the third preferred embodiment.
- the structure of the active matrix array substrate 40 provided in the liquid crystal display according to the third preferred embodiment is also basically the same as the structure of the active matrix array substrate 1 provided in the liquid crystal display according to the first preferred embodiment except for the source line 3 . Therefore, differences from the liquid crystal display and the defect correcting method for the same according to the first preferred embodiment will be mainly described hereinafter.
- a bypass line 41 is included in the vicinity of the opening portion 15 of the source line 3 .
- the bypass line 41 may pass above the opening portion 15 .
- the source line 3 being the upper-layer side line passing above the opening portion 15 is cut at the cut section 22 from the transparent substrate side by using the correcting mechanism such as the laser for correcting the SG leak 20 a or the SG leak 20 b.
- a judgment on which of the SG leak 20 a in the TFT 7 a or the SG leak 20 b in the TFT 7 b is developed can be easily made based on an image viewed from the transparent substrate side. Thereafter, if the SG leak 20 a in the TFT 7 a is developed as shown in FIG. 12A , the source line 3 a on the input side is cut at the cut section 23 a to completely isolate the SG leak 20 a from the source line 3 .
- the active matrix array substrate 40 provided in the liquid crystal display according to the third preferred embodiment has the bypass line 41 , the source signal S from the input side is inputted to the TFT 7 b via the bypass line 41 . Accordingly, the sub-pixel (the sub-pixel electrode 5 b ) can be driven without making the correction using the auxiliary line.
- the source line 3 b on the non-input side is cut to completely isolate the SG leak 20 b from the source line 3 .
- the source signal S from the input side is supplied also to the non-input side via the bypass line 41 . Accordingly, the sub-pixels (pixels) placed on the non-input side of the sub-pixel (the sub-pixel electrode 5 b ) can be driven without making the correction using the auxiliary line.
- the defect can be observed as a defective pixel of a sub-pixel, not as a defective pixel of a whole pixel, and the size of the defective pixel is made smaller than conventional, leading to no defects.
- the liquid crystal display according to the third preferred embodiment has equal redundancy to the liquid crystal display according to the second preferred embodiment.
- an aperture area per pixel can be widely assured, which enables an improvement in display quality in accordance with an improvement in display luminance, cost reduction or reduction in power consumption of a backlight in accordance with an improvement in luminance efficiency, and the like.
- each of the pixel electrodes includes the assembly of two sub-pixel electrodes in the above-described preferred embodiments, it is also preferable that each of the pixel electrodes includes an assembly of three or more sub-pixel electrodes.
- the gate line is the lower-layer side line and the source line is the upper-layer side line
- the gate line is the upper-layer side line and the source line is the lower-layer side line.
- any elements which function as a switching element such as a metal insulator metal (MIM) may be used.
- MIM metal insulator metal
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Abstract
A liquid crystal display uses a pixel division method by which the size of a defect can be reduced much more than conventionally possible, and a defect correcting method for the liquid crystal display. The liquid crystal display is provided with an active matrix array substrate including a plurality of gate lines and a plurality of source lines arranged on a transparent substrate to intersect with each other, and a plurality of pixel electrodes arranged in a matrix, each pixel electrode including an assembly of a plurality of sub-pixel electrodes, separate TFTs respectively connected to the sub-pixel electrodes in the vicinity of an intersection portion of the gate line and the source line, the TFTs being driven by the common gate line and the common source line, and at least one opening portion being formed in a lower-layer side line placed in a lower layer at the intersection portion.
Description
- 1. Field of the Invention
- The present invention relates to a liquid crystal display and a defect correcting method for the same, and more specifically relates to a liquid crystal display adopting a pixel division method and a defect correcting method for the same.
- 2. Description of the Related Art
- A liquid crystal display has excellent characteristics such as high definition, thinness, lightness and low power consumption. Thus, recently, the liquid crystal display is rapidly expanding its market in accordance with an improvement in production capacity, an improvement in price competition with other displays, and the like.
- For this kind of liquid crystal display, Japanese Patent Application Unexamined Publication No. 2004-78157, for example, discloses a liquid crystal display provided with an active matrix array substrate adopting a pixel division method in which each pixel electrode includes an assembly of a plurality of sub-pixel electrodes.
-
FIG. 13 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a conventional liquid crystal display. Specifically, as shown inFIG. 13 , apixel electrode 101 on an activematrix array substrate 100 is split intosub-pixel electrodes gate line 102 therebetween. In the vicinity of anintersection portion 105 of thegate line 102 and asource line 104, separate thin film transistors (TFTs) 106 a and 106 b which are driven by thecommon gate line 102 and thecommon source line 104 are provided, and theTFTs corresponding sub-pixel electrodes - In the liquid crystal display provided with the above-mentioned active
matrix array substrate 100, thecommon gate line 102 and thecommon source line 104 are used to drive thesub-pixel electrodes separate TFTs - Therefore, for example, as shown in
FIG. 14 , when aleak 107 a (hereinafter referred to as the “SG leak”) is developed in theTFT 106 a between thegate line 102 and thesource line 104, and a correction for theSG leak 107 a is performed using a correcting device such as a laser, it is necessary to cut thesource line 104 atcut sections SG leak 107 a from thesource line 104. Consequently, even if the leak is developed only in the TFT 106 a, thesub-pixel electrode 103 b driven by the TFT 106 b is unintentionally made defective. - In other words, there is a problem that even though the pixel division method in which each pixel electrode includes the assembly of the plurality of sub-pixel electrodes is adopted, a whole pixel unintentionally results in a defective pixel (for example, if the liquid crystal display uses a normally black mode, the defective pixel is observed as a full black dot of a whole pixel).
- In order to overcome the problems described above, preferred embodiments of the present invention provide a liquid crystal display adopting a pixel division method by which the size of a defect can be made smaller than conventional, and also provide a defect correcting method for the liquid crystal display.
- According to a preferred embodiment the present invention, a liquid crystal display is provided with an active matrix array substrate including a plurality of gate lines and a plurality of source lines disposed on a transparent substrate to intersect with each other, and a plurality of pixel electrodes arranged in a matrix, each of the pixel electrodes including an assembly of a plurality of sub-pixel electrodes, separate active elements respectively connected to the sub-pixel electrodes in the vicinity of an intersection portion of the gate line and the source line, the active elements being driven by the common gate line and the common source line, and at least one opening portion being formed in a lower-layer side line placed in a lower layer at the intersection portion of the gate line and the source line.
- In the above liquid crystal display, it is preferable that the lower-layer side line is the gate line, and an upper-layer side line which is placed in an upper layer of the lower-layer side line is the source line.
- In addition, in the above liquid crystal display, it is preferable that an additional source line being partially connected to and extending along the source line is further included, or that a bypass line being connected to the source line at the intersection portion is included.
- In addition, in the above liquid crystal display, it is preferable that the opening portion does not include an electrode layer and/or a semiconductor layer.
- On the other hand, a defect correcting method for a liquid crystal display according to another preferred embodiment of the present invention is a defect correcting method for the above liquid crystal display, and includes at least the steps of cutting the upper-layer side line passing above the opening portion, and cutting a line including a defective section in the cut line so as to disconnect the defective section.
- The liquid crystal display as mentioned above is provided with the active matrix array substrate in which the separate active elements, which are driven by the common gate line and the common source line, are respectively connected to their corresponding sub-pixel electrodes in the vicinity of the intersection portion of the gate line and the source line, and the opening portion is formed in the lower-layer side line at the intersection portion of the gate line and the source line.
- Therefore, when a defect is developed in any one of the active elements and the like, the upper-layer side line passing above the opening portion can be easily cut by using a correcting mechanism such as a laser. If a line including the defective section in the cut line is cut, the defective section can be completely isolated from the line.
- If correction using an auxiliary line and the like are made as necessary thereafter, the defect can be observed as a defective pixel of a sub-pixel, not as a defective pixel of a whole pixel. Thus, the size of the defective pixel is made smaller than conventional, leading to no defects. Consequently, when the active matrix array substrate is used especially in a comparatively large liquid crystal display and the like, advantages achieved include an improvement in display quality due to the reduction of the number of defects, an improvement in production efficiency (yields), and the like.
- When the additional source line being partially connected to and extending along the source line is further included, the advantages described above can be obtained without making the correction using the auxiliary line. Therefore, there is an advantage that hours of work required for defect correction can be reduced to further improve the production efficiency of the liquid crystal display.
- In addition, when the bypass line is connected to the source line in the intersection portion, an aperture area per pixel can be widely assured while maintaining certain redundancy as mentioned above. Therefore, advantages including an improvement in display quality in accordance with an improvement in display luminance, cost reduction or reduction in power consumption of a backlight in accordance with an improvement in luminance efficiency, and the like, are achieved.
- In addition, when the opening portion does not include the electrode layer and/or the semiconductor layer, there are advantages that a leak by the electrode layer and a cut piece produced during the line cutting by using the correcting mechanism such as the laser is not developed, and correction can be easily made.
- On the other hand, according to the defect correcting method for the liquid crystal display according to another preferred embodiment of the present invention, by cutting the upper-layer side line passing above the opening portion, a judgment on whether the defective section is present in a line on an input-end side of the cut section or in a line on an open-end side of the cut section can be easily made through image display after the line cutting, and the defective section can be isolated from the line by cutting the line including the defective section.
- Therefore, the defective section, which is conventionally hard to detect by a microscopic observation and the like, can be easily detected. Thus, the defect correcting method has an advantage of allowing for reliable correction.
- Other features, elements, steps, characteristics and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the attached drawings.
-
FIG. 1 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a first preferred embodiment of the present invention. -
FIGS. 2A and 2B are schematic diagrams showing a placement relationship between slits formed in the pixel electrode (sub-pixel electrodes) and ribs formed on a common electrode in the liquid crystal display according to the first preferred embodiment (in a multi-domain vertical alignment (MVA) mode). -
FIGS. 3A and 3B are views showing positions of an SG leak which is developed in thin film transistors (TFTs) on the active matrix array substrate provided in the liquid crystal display according to the first preferred embodiment of the present invention. -
FIG. 4 is a schematic diagram showing an image observed from a transparent substrate side of the active matrix array substrate when the SG leak shown inFIG. 3 is developed. -
FIGS. 5A and 5B are views for explaining steps for making correction using an auxiliary line by cutting a source line above an opening portion, and then cutting a source line on an input side or a source line on a non-input side to isolate the SG leak. -
FIGS. 6A and 6B are schematic diagrams showing images observed from the transparent substrate side of the active matrix array substrate when the source line above the opening portion is cut. -
FIGS. 7A and 7B are schematic diagrams showing images observed from the transparent substrate side of the active matrix array substrate when the source line on the input side or the source line of the non-input side is cut to isolate the SG leak. -
FIGS. 8A and 8B are schematic diagrams showing images observed from the transparent substrate side of the active matrix array substrate when the correction using the auxiliary line is made. -
FIG. 9 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a second preferred embodiment of the present invention. -
FIGS. 10A and 10B are views for explaining steps of cutting a source line above an opening portion, and then cutting a source line on an input side or a source line on a non-input side to isolate an SG leak in the liquid crystal display according to the second preferred embodiment of the present invention. -
FIG. 11 is a schematic view showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a third preferred embodiment of the present invention. -
FIGS. 12A and 12B are views for explaining steps of cutting a source line above an opening portion, and then cutting a source line on an input side or a source line on a non-input side to isolate an SG leak in the liquid crystal display according to the third preferred embodiment of the present invention. -
FIG. 13 is a schematic diagram showing an electrode substrate formed on an active matrix array substrate provided in a conventional liquid crystal display. -
FIG. 14 is a view for explaining a defect correcting method when an SG leak is developed in any one of TFTs in the conventional liquid crystal display. - A detailed description of a liquid crystal display and a defect correcting method for the same according to preferred embodiments of the present invention will now be given.
- In principle, the liquid crystal display according to preferred embodiments of the present invention is a device in which at least a driving circuit which controls alignment of liquid crystals based on an external signal is attached to a liquid crystal panel in which the liquid crystals are sealed in between an active matrix array substrate having at least a plurality of pixel electrodes and a plurality of active elements on a transparent substrate and a substrate having at least a common electrode for the plurality of pixel electrodes on a transparent common substrate opposed to the transparent substrate, where information can be displayed by conducting optical modulation.
- The liquid crystal display is characterized in that the active matrix array substrate has a new structure. Accordingly, the structure of the active matrix array substrate provided in the liquid crystal display according to the preferred embodiments of the present invention will be mainly described hereinafter.
- On the other hand, the defect correcting method for the liquid crystal display according to a preferred embodiment of the present invention is a method for correcting a defect by utilizing the new structure of the active matrix array substrate provided in the liquid crystal display according to a preferred embodiment of the pre sent invention. Therefore, the defect correcting method will be described with respect to each of liquid crystal displays according to preferred embodiments of the present invention.
-
FIG. 1 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a first preferred embodiment of the present invention. - On a transparent substrate (unillustrated) constituting the active
matrix array substrate 1, a plurality ofgate lines 2 extending in a row direction are formed, and a plurality ofsource lines 3 extending in a column direction are formed while intersecting at right angles with thegate lines 2 via an insulating layer (unillustrated). Incidentally, thegate line 2 shown inFIG. 1 is the nth one, and thesource line 3 shown inFIG. 1 is the mth one. In addition, thegate line 2 is a lower-layer side line, and thesource line 3 is an upper-layer side line. - A
pixel electrode 4 is split into twosub-pixel electrodes gate line 2 therebetween. In the vicinity of anintersection portion 6 of thegate line 2 and thesource line 3, separate thin film transistors (TFTs) 7 a and 7 b which are respectively connected to thesub-pixel electrodes - The
TFTs gate electrodes common gate line 2. In addition, a display signal voltage provided bysource electrodes common source line 3 is provided to thesub-pixel electrodes drain lines drain electrodes - In the
drain lines auxiliary capacitance lines gate line 2, via the insulating layer (unillustrated) function asauxiliary capacitance electrodes auxiliary capacitance lines auxiliary capacitance electrode common electrodes - At the
intersection portion 6 of thegate line 2 and thesource line 3, at least oneopening portion 15 is formed in thegate line 2 being the lower-layer side line. Here, it is preferable that the openingportion 15 does not include an electrode layer and/or a semiconductor layer and the like. In other words, it is preferable that the openingportion 15 does not include constituent elements other than the upper-layer side line. - If the opening
portion 15 does not include the electrode layer and/or the semiconductor layer, a leak and the like by a cut piece and the electrode layer are hard to be developed at the time of cutting a line using a correcting mechanism such as a laser, and correction can be easily made. Specific examples of the electrode layer and the semiconductor layer include ITO, an n+/i layer and the like for the upper layer. - In the liquid crystal display according to the first preferred embodiment (also in the other preferred embodiments to be described later), it is preferable that slits 16 (portions which do not include the electrode layer) are formed in the
sub-pixel electrodes ribs 18 are formed on thecommon electrode 17, as schematically shown inFIGS. 2A and 2B , and nematic liquid crystals having negative dielectric anisotropy are used asliquid crystals 19. This is because liquid crystal molecules are aligned in multiple directions by the action of theslits 16 and theribs 18 at the time of application of an electric field, so that a favorable wide viewing angle can be obtained. - Next, a defect correcting method for the liquid crystal display according to the first preferred embodiment will be described referring to
FIGS. 3A to 8B . - When an
SG leak 20 a in theTFT 7 a or anSG leak 20 b in theTFT 7 b is developed between thegate line 2 and thesource line 3 as shown inFIGS. 3A and 3B , observation by lighting of a liquid crystal panel shows that across defect 21 having an intersection point at thepixel electrode 4 is developed in an image viewed from the transparent substrate side of the activematrix array substrate 1, as shown inFIG. 4 . Incidentally, at this point in time, it is uncertain which of theSG leak 20 a in theTFT 7 a or theSG leak 20 b in theTFT 7 b is developed. In other words, it is uncertain which of a state inFIG. 3A or a state inFIG. 3B is brought about. - Then, as shown in
FIGS. 5A and 5B , thesource line 3 being the upper-layer side line passing above the openingportion 15 is cut at acut section 22 from the transparent substrate side by using the correcting mechanism such as the laser, and the observation by lighting of the liquid crystal panel is made again. - In the observation, if the
SG leak 20 a in theTFT 7 a on an input-end side (hereinafter referred to as the “input side”) of thecut section 22 of thesource line 3 is developed as shown inFIG. 5A , thecross defect 21 is still observed as shown inFIG. 6A . On the other hand, if theSG leak 20 b in theTFT 7 b on an open-end side (hereinafter referred to as the “non-input side”) of thecut section 22 of thesource line 3 is developed as shown inFIG. 5B , aline defect 21 a in the direction of thegate line 2 disappears and aline defect 21 b in the direction of thesource line 3 is observed as shown inFIG. 6B . - Shortly, by cutting the
source line 3 passing above the openingportion 15 at thecut section 22, a judgment on which of theSG leak 20 a in theTFT 7 a or theSG leak 20 b in theTFT 7 b is developed is facilitated. Accordingly, it becomes possible to judge which part of the cut line (asource line 3 a on the input side or asource line 3 b on the non-input side) is to be cut in the subsequent step. - Then, if the
SG leak 20 a in theTFT 7 a is developed as shown inFIG. 5A , thesource line 3 a on the input side is cut at acut section 23 a to completely isolate theSG leak 20 a from thesource line 3. In this case, in the image of the observation by lighting, theline defect 21 a in the direction of thegate line 2 disappears, and theline defect 21 b in the direction of thesource line 3 is observed, as shown inFIG. 7A . - On the other hand, if the
SG leak 20 b in theTFT 7 b is developed as shown inFIG. 5B , thesource line 3 b on the non-input side is cut at acut section 23 b to completely isolate theSG leak 20 b from thesource line 3. In this case, in the image of the observation by lighting, theline defect 21 b in the direction of thesource line 3 is still observed as shown inFIG. 7B . - Next, in a case where the
SG leak 20 a in theTFT 7 a is developed as shown inFIG. 5A , by making correction using an auxiliary line (a redundancy line) (unillustrated) and inputting a source signal S′ via the auxiliary line from thesource line 3 b on the non-input side to theTFT 7 b, a sub-pixel (thesub-pixel electrode 5 b) can be driven. On the other hand, in a case where theSG leak 20 b in theTFT 7 b is developed as shown inFIG. 5B , by performing the correction using the auxiliary line and inputting the source signal S′ (unillustrated) from thesource line 3 b on the non-input side, sub-pixels (pixels) (unillustrated) arranged on the non-input side of the sub-pixel (thesub-pixel electrode 5 b) can be driven. - Therefore, for example, if the liquid crystal display according to the first preferred embodiment uses a normally black mode, the defective pixel is observed as not a full black dot of a whole pixel but a half
black dot FIGS. 8A and 8B . In addition, for example, if the liquid crystal display according to the first preferred embodiment uses a normally white mode, the defective pixel is observed as a half bright dot of a sub-pixel, and by performing processing such as forming it into a black dot, the defective pixel is observed as a halfblack dot - For the correction using the auxiliary line, a known method can be used (see, for example, Japanese Patent Application Unexamined Publication Nos. Hei5-203986 and Hei9-146121).
- Specifically, an auxiliary line (unillustrated) is placed in a peripheral portion of a display region on the active
matrix array substrate 1 so as to extend completely around or extend half-way around the display region, and an input end and an open end of thesource line 3 are short-circuited by the auxiliary line. -
FIG. 9 is a schematic view showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to a second preferred embodiment of the present invention. - The structure of the active
matrix array substrate 30 provided in the liquid crystal display according to the second preferred embodiment is basically the same as the structure of the activematrix array substrate 1 provided in the liquid crystal display according to the first preferred embodiment except for thesource line 3. Therefore, differences from the liquid crystal display and the defect correcting method for the same according to the first preferred embodiment will be mainly described hereinafter. - As shown in
FIG. 9 , in the activematrix array substrate 30 provided in the liquid crystal display according to the second preferred embodiment, anadditional source line 32 is further included while being partially connected to thesource line 3 via connectingportions 31 and extending along thesource line 3. - In the liquid crystal display according to the second preferred embodiment as mentioned above, when the
SG leak 20 a in theTFT 7 a or theSG leak 20 b in theTFT 7 b is developed as shown inFIGS. 10A and 10B , similarly to the first preferred embodiment, thesource line 3 being the upper-layer side line passing above the openingportion 15 is cut at thecut section 22 from the transparent substrate side by using the correcting mechanism such as the laser for correcting theSG leak 20 a or theSG leak 20 b. - Accordingly, a judgment on which of the
SG leak 20 a in theTFT 7 a or theSG leak 20 b in theTFT 7 b is developed can be easily made based on an image viewed from the transparent substrate side. Then, if theSG leak 20 a in theTFT 7 a is developed as shown inFIG. 10A , thesource line 3 a on the input side is cut at thecut section 23 a to completely isolate theSG leak 20 a from thesource line 3. - Here, as the active
matrix array substrate 30 provided in the liquid crystal display according to the second preferred embodiment has theadditional source line 32, a source signal S from the input side is inputted to theTFT 7 b via theadditional source line 32. Accordingly, the sub-pixel (thesub-pixel electrode 5 b) can be driven without making the correction using the auxiliary line. - On the other hand, if the
SG leak 20 b in theTFT 7 b is developed as shown inFIG. 10B , thesource line 3 b on the non-input side is cut to completely isolate theSG leak 20 b from thesource line 3. - Accordingly, the source signal S from the input side is supplied also to the non-input side via the
additional source line 32. Thus, the sub-pixels (pixels) placed on the non-input side of the sub-pixel (thesub-pixel electrode 5 b) can be driven without making the correction using the auxiliary line. - Consequently, also owing to the liquid crystal display according to the second preferred embodiment, the defect can be observed as a defective pixel of a sub-pixel, not as a defective pixel of a whole pixel, and the size of the defective pixel is made smaller than conventional, leading to no defects.
- In addition, in the liquid crystal display according to the second preferred embodiment, there is no need to make the correction using the auxiliary line. As a result, hours of work required for defect correction can be reduced to improve production efficiency of the liquid crystal display. Further, delay of the source signal due to the correction using the auxiliary line and the like in the case of a large liquid crystal display can be avoided.
-
FIG. 11 is a schematic diagram showing a pixel electrode formed on an active matrix array substrate provided in a liquid crystal display according to the third preferred embodiment. - The structure of the active
matrix array substrate 40 provided in the liquid crystal display according to the third preferred embodiment is also basically the same as the structure of the activematrix array substrate 1 provided in the liquid crystal display according to the first preferred embodiment except for thesource line 3. Therefore, differences from the liquid crystal display and the defect correcting method for the same according to the first preferred embodiment will be mainly described hereinafter. - As shown in
FIG. 11 , in the activematrix array substrate 40 provided in the liquid crystal display according to the third preferred embodiment, abypass line 41 is included in the vicinity of the openingportion 15 of thesource line 3. In this preferred embodiment, an example of this preferred embodiment where thebypass line 41 does not pass above the openingportion 15 is illustrated. However, thebypass line 41 may pass above the openingportion 15. - In the liquid crystal display according to the third preferred embodiment as mentioned above, when the
SG leak 20 a in theTFT 7 a or theSG leak 20 b in theTFT 7 b is developed as shown inFIGS. 12A and 12B , similarly to the first and second preferred embodiments, thesource line 3 being the upper-layer side line passing above the openingportion 15 is cut at thecut section 22 from the transparent substrate side by using the correcting mechanism such as the laser for correcting theSG leak 20 a or theSG leak 20 b. - Accordingly, a judgment on which of the
SG leak 20 a in theTFT 7 a or theSG leak 20 b in theTFT 7 b is developed can be easily made based on an image viewed from the transparent substrate side. Thereafter, if theSG leak 20 a in theTFT 7 a is developed as shown inFIG. 12A , thesource line 3 a on the input side is cut at thecut section 23 a to completely isolate theSG leak 20 a from thesource line 3. - Here, as the active
matrix array substrate 40 provided in the liquid crystal display according to the third preferred embodiment has thebypass line 41, the source signal S from the input side is inputted to theTFT 7 b via thebypass line 41. Accordingly, the sub-pixel (thesub-pixel electrode 5 b) can be driven without making the correction using the auxiliary line. - On the other hand, if the
SG leak 20 b in theTFT 7 b is developed as shown inFIG. 12B , thesource line 3 b on the non-input side is cut to completely isolate theSG leak 20 b from thesource line 3. - Thus, the source signal S from the input side is supplied also to the non-input side via the
bypass line 41. Accordingly, the sub-pixels (pixels) placed on the non-input side of the sub-pixel (thesub-pixel electrode 5 b) can be driven without making the correction using the auxiliary line. - Consequently, also according to the liquid crystal display according to the third preferred embodiment, the defect can be observed as a defective pixel of a sub-pixel, not as a defective pixel of a whole pixel, and the size of the defective pixel is made smaller than conventional, leading to no defects. In addition, the liquid crystal display according to the third preferred embodiment has equal redundancy to the liquid crystal display according to the second preferred embodiment.
- Further, in the liquid crystal display according to the third preferred embodiment, an aperture area per pixel can be widely assured, which enables an improvement in display quality in accordance with an improvement in display luminance, cost reduction or reduction in power consumption of a backlight in accordance with an improvement in luminance efficiency, and the like.
- The foregoing descriptions of the preferred embodiments of the present invention are not intended to be exhaustive or to limit the present invention to the precise form disclosed, and modifications and variations are possible in the light of the above teachings or may be acquired from practice of the present invention.
- While the descriptions have been made to cases where each of the pixel electrodes includes the assembly of two sub-pixel electrodes in the above-described preferred embodiments, it is also preferable that each of the pixel electrodes includes an assembly of three or more sub-pixel electrodes.
- In addition, while the descriptions have been made with reference to examples of preferred embodiments where the gate line is the lower-layer side line and the source line is the upper-layer side line, it is also preferable that the gate line is the upper-layer side line and the source line is the lower-layer side line.
- Incidentally, while the descriptions have been made of examples of preferred embodiments where the TFTs are preferably used as the active elements, any elements which function as a switching element such as a metal insulator metal (MIM) may be used.
- While preferred embodiments of the present invention have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing the scope and spirit of the present invention. The scope of the present invention, therefore, is to be determined solely by the following claims.
Claims (1)
1. A liquid crystal display provided with an active matrix array substrate, the active matrix array substrate comprising:
a plurality of gate lines extending in a first direction and a plurality of source lines extending in a second direction that is different from the first direction, the plurality of gate lines and the plurality of source lines being arranged on a transparent substrate so as to intersect with each other at an intersection portion;
a plurality of pixel electrodes arranged in a matrix; and
at least one opening portion being formed in at least one of the plurality of gate lines; wherein
at least one portion of at least one of the plurality of source lines is located within the at least one opening portion and extends in the second direction, and at least one portion of a source electrode projects in the first direction from the at least one of the plurality of source lines and overlaps with the at least one of the plurality of gate lines.
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US13/229,868 US8368833B2 (en) | 2004-12-14 | 2011-09-12 | Liquid crystal display including source lines defining an opening portion and a defect correcting method for the same |
US13/733,391 US20130120703A1 (en) | 2004-12-14 | 2013-01-03 | Liquid crystal display and a defect correcting method for the same |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150177579A1 (en) * | 2013-12-23 | 2015-06-25 | Lg Display Co., Ltd. | Liquid crystal display device |
US10564499B2 (en) | 2010-12-20 | 2020-02-18 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
US11528349B2 (en) * | 2018-11-16 | 2022-12-13 | Samsung Electronics Co., Ltd. | Electronic device including waterproof structure |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7777825B2 (en) * | 2004-12-14 | 2010-08-17 | Sharp Kabushiki Kaisha | Liquid crystal display and a defect correcting method for the same |
KR100977978B1 (en) * | 2006-05-25 | 2010-08-24 | 엘지디스플레이 주식회사 | Liquid crystal display and fabricating method thereof |
US8253903B2 (en) * | 2006-12-26 | 2012-08-28 | Sharp Kabushiki Kaisha | Liquid crystal panel, liquid crystal display device, and television device |
JP4851545B2 (en) * | 2007-02-09 | 2012-01-11 | シャープ株式会社 | Active matrix substrate, liquid crystal panel, liquid crystal display unit, liquid crystal display device, television receiver, active matrix substrate manufacturing method, liquid crystal panel manufacturing method |
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KR101540341B1 (en) * | 2008-10-17 | 2015-07-30 | 삼성전자주식회사 | Panel structure, display device comprising the panel structure and manufacturing methods thereof |
EP2256544A1 (en) * | 2009-05-27 | 2010-12-01 | Polymer Vision Limited | A method for manufacturing a display panel and a display panel provided with repairable elements. |
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KR20170130641A (en) | 2009-10-21 | 2017-11-28 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Liquid crystal display device and electronic device including the same |
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WO2012002040A1 (en) | 2010-07-01 | 2012-01-05 | Semiconductor Energy Laboratory Co., Ltd. | Driving method of liquid crystal display device |
TWI453830B (en) * | 2010-08-16 | 2014-09-21 | Au Optronics Corp | Thin film transistor, method of fabricating thin film transistor and pixel structure |
FR2971862B1 (en) * | 2011-02-22 | 2016-01-22 | Commissariat Energie Atomique | LIQUID CRYSTAL DISPLAY MATRIX WITH IRREGULAR OPENING GEOMETRY |
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CN104007594B (en) * | 2014-06-17 | 2017-12-29 | 深圳市华星光电技术有限公司 | TFT array substrate structure |
CN115542621A (en) | 2015-02-12 | 2022-12-30 | 株式会社半导体能源研究所 | Display device |
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CN109270756B (en) * | 2018-09-30 | 2020-12-25 | 惠科股份有限公司 | Display panel and display device |
JP6888039B2 (en) | 2019-02-27 | 2021-06-16 | パナソニック液晶ディスプレイ株式会社 | Liquid crystal display panel |
US11333935B2 (en) | 2019-02-27 | 2022-05-17 | Panasonic Liquid Crystal Display Co., Ltd. | Liquid crystal display panel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8035768B2 (en) * | 2004-12-14 | 2011-10-11 | Sharp Kabushiki Kaisha | Liquid crystal display and a defect correcting method for the same |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63262621A (en) | 1987-04-21 | 1988-10-28 | Alps Electric Co Ltd | Trimming method for thin film transistor array |
US5151807A (en) | 1989-01-31 | 1992-09-29 | Sharp Kabushiki Kaisha | Active matrix substrate and active matrix display apparatus |
US5343216A (en) | 1989-01-31 | 1994-08-30 | Sharp Kabushiki Kaisha | Active matrix substrate and active matrix display apparatus |
JPH0324524A (en) * | 1989-06-21 | 1991-02-01 | Sharp Corp | Active matrix display device |
JPH02223929A (en) * | 1989-02-27 | 1990-09-06 | Hitachi Ltd | Liquid crystal display device |
JPH0333724A (en) | 1989-06-30 | 1991-02-14 | Hitachi Ltd | Liquid crystal display device |
JPH0496021A (en) * | 1990-08-13 | 1992-03-27 | Fujitsu Ltd | Active matrix type display device |
KR920006894A (en) | 1990-09-27 | 1992-04-28 | 쓰지 하루오 | Active matrix display |
JP2589866B2 (en) * | 1990-09-27 | 1997-03-12 | シャープ株式会社 | Active matrix substrate |
JP2812346B2 (en) | 1992-01-27 | 1998-10-22 | 日本電気株式会社 | Liquid crystal display device and method of manufacturing the same |
JP3066569B2 (en) | 1995-09-21 | 2000-07-17 | 株式会社アドバンスト・ディスプレイ | Liquid crystal display |
TW406204B (en) | 1995-09-21 | 2000-09-21 | Advanced Display Kk | Liquid crystal display apparatus |
JP4248306B2 (en) | 2002-06-17 | 2009-04-02 | シャープ株式会社 | Liquid crystal display |
KR100491560B1 (en) * | 2003-05-06 | 2005-05-27 | 엘지.필립스 엘시디 주식회사 | Method and Apparatus for Testing Liquid Crystal Display Device |
JP2005252228A (en) * | 2004-02-05 | 2005-09-15 | Sharp Corp | Display device and manufacturing method thereof |
JP2006049647A (en) * | 2004-08-05 | 2006-02-16 | Seiko Epson Corp | Active matrix substrate, manufacturing method thereof, electro-optical device, and electronic device |
CN101313346B (en) * | 2005-11-24 | 2011-05-04 | 夏普株式会社 | Active matrix substrate, liquid crystal panel, display, television receiver, and method of correcting and manufacturing the substrate and panel |
TWI328701B (en) * | 2006-11-01 | 2010-08-11 | Au Optronics Corp | Pixel sturctur and repairing method thereof |
TWI342426B (en) * | 2006-12-11 | 2011-05-21 | Chimei Innolux Corp | Liquid crystal display panel and method of repairing the same |
US20080174500A1 (en) * | 2007-01-23 | 2008-07-24 | Microsoft Corporation | Magnetic communication link with diversity antennas |
TWI357981B (en) * | 2007-01-30 | 2012-02-11 | Au Optronics Corp | Testing system and method of liquid crystal displa |
-
2005
- 2005-12-13 US US11/721,538 patent/US7777825B2/en active Active
- 2005-12-13 WO PCT/JP2005/022840 patent/WO2006064789A1/en not_active Application Discontinuation
- 2005-12-13 JP JP2006548849A patent/JP4841438B2/en active Active
-
2010
- 2010-07-30 US US12/847,092 patent/US7903190B2/en active Active
-
2011
- 2011-02-01 US US13/018,815 patent/US8035768B2/en active Active
- 2011-07-04 JP JP2011147860A patent/JP4920117B2/en active Active
- 2011-09-12 US US13/229,868 patent/US8368833B2/en active Active
-
2013
- 2013-01-03 US US13/733,391 patent/US20130120703A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8035768B2 (en) * | 2004-12-14 | 2011-10-11 | Sharp Kabushiki Kaisha | Liquid crystal display and a defect correcting method for the same |
Cited By (7)
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US10564499B2 (en) | 2010-12-20 | 2020-02-18 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
US11181793B2 (en) | 2010-12-20 | 2021-11-23 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
US11754896B2 (en) | 2010-12-20 | 2023-09-12 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
US20150177579A1 (en) * | 2013-12-23 | 2015-06-25 | Lg Display Co., Ltd. | Liquid crystal display device |
US10162228B2 (en) * | 2013-12-23 | 2018-12-25 | Lg Display Co., Ltd. | Liquid crystal display device |
US11528349B2 (en) * | 2018-11-16 | 2022-12-13 | Samsung Electronics Co., Ltd. | Electronic device including waterproof structure |
US11930127B2 (en) | 2018-11-16 | 2024-03-12 | Samsung Electronics Co., Ltd. | Electronic device including waterproof structure |
Also Published As
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US8368833B2 (en) | 2013-02-05 |
JP4841438B2 (en) | 2011-12-21 |
JPWO2006064789A1 (en) | 2008-06-12 |
WO2006064789A1 (en) | 2006-06-22 |
US20100296020A1 (en) | 2010-11-25 |
JP4920117B2 (en) | 2012-04-18 |
JP2011191791A (en) | 2011-09-29 |
US20110122354A1 (en) | 2011-05-26 |
US20090262274A1 (en) | 2009-10-22 |
US20120236226A1 (en) | 2012-09-20 |
US8035768B2 (en) | 2011-10-11 |
US7777825B2 (en) | 2010-08-17 |
US7903190B2 (en) | 2011-03-08 |
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