WO2011001716A1 - 液晶表示装置 - Google Patents
液晶表示装置 Download PDFInfo
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- WO2011001716A1 WO2011001716A1 PCT/JP2010/054117 JP2010054117W WO2011001716A1 WO 2011001716 A1 WO2011001716 A1 WO 2011001716A1 JP 2010054117 W JP2010054117 W JP 2010054117W WO 2011001716 A1 WO2011001716 A1 WO 2011001716A1
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- liquid crystal
- electrode
- crystal display
- display device
- comb
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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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
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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
- G02F1/136286—Wiring, e.g. gate line, drain line
- G02F1/13629—Multilayer wirings
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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
- G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
- G02F2201/123—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode pixel
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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
- G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
- G02F2201/124—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode interdigital
Definitions
- the present invention relates to a liquid crystal display device. More specifically, the present invention relates to a liquid crystal display device characterized in the shape of electrodes and wiring.
- a liquid crystal display is a display device that controls transmission / blocking of light (display on / off) by controlling the orientation of liquid crystal molecules having birefringence.
- LCD display methods include vertical alignment (VA) mode in which liquid crystal molecules having negative dielectric anisotropy are aligned perpendicular to the substrate surface, and liquid crystal molecules having positive dielectric anisotropy.
- VA vertical alignment
- IPS in-plane switching
- a general IPS mode liquid crystal display device includes a common electrode to which a reference potential is supplied and a pixel electrode to which a potential of a pixel to be displayed is supplied (see, for example, Patent Documents 1 to 4). Further, a scanning line to which a scanning signal is supplied, a thin film transistor (TFT: Thin Film Transistor), and the like are provided. Both the common electrode and the pixel electrode have a comb shape, and the comb teeth of each electrode are arranged to engage with each other. Then, the liquid crystal is driven by an electric field formed between the pixel electrode and the common electrode.
- TFT Thin Film Transistor
- the electrodes and wirings are preferably formed as thin as possible from the viewpoint of improving the transmittance.
- the electrodes and wirings are formed too thin, disconnection may occur, and a necessary potential may not be supplied to the electrodes and wirings.
- FIG. 73 is a schematic plan view showing a disconnection state in a conventional liquid crystal display device.
- an IPS mode liquid crystal display device will be described on the basis of Patent Document 1.
- various wirings and electrodes are provided on a TFT (thin film transistor) array substrate.
- the TFT substrate has a scanning electrode wiring 125 and a first common electrode wiring 122.
- the scanning electrode wiring 125 and the first common electrode wiring 122 are formed on the same plane.
- an insulating film is formed on the scan electrode wiring 125 and the first common electrode wiring 122, and on the insulating film, the signal electrode wiring 124, the pixel electrode wiring 121, and the second common electrode wiring. 123 is formed.
- the first common electrode wiring 122 and the second common electrode wiring 123 are electrically connected.
- the scanning electrode wiring 125, the signal electrode wiring 124, and the pixel electrode wiring 121 are connected to each other through a TFT 126 that is a semiconductor element.
- the TFT 126 functions as a switching element.
- the line widths of the pixel electrode wiring 121 and the second common electrode wiring 123 are each 5 ⁇ m.
- a counter substrate having red, green, and blue color filters is disposed at a position facing the TFT substrate through the liquid crystal layer.
- a signal potential is supplied from the signal electrode wiring 124 to the pixel electrode wiring 121 while the TFT 126 is on. Thereafter, in a state where the TFT 126 is not selected (off), the potential of the pixel electrode wiring 121 is maintained, and a horizontal electric field is generated between the second common electrode wiring 123.
- the alignment direction of the liquid crystal molecules arranged in one direction parallel to the substrate surface is deformed in a different direction in the plane, and as a result, the polarization of light incident on the liquid crystal layer The state changes.
- the present invention has been made in view of the above-described present situation, and an object of the present invention is to provide a liquid crystal display device that does not cause pixel defects even when electrode disconnection occurs.
- the inventors of the present invention have studied various liquid crystal display devices that have few problems even when an electrode or wiring is disconnected, and have focused attention on means for correcting using a laser when an electrode or wiring is disconnected. Further, by providing additional electrodes or wirings for correction so as to overlap with a plurality of electrodes or wirings, even when disconnection occurs, the electrodes or wirings for correction are dissolved by laser irradiation, and conduction is performed. The present inventors have found that it is possible to make corrections to ensure the above, and have conceived that the above-mentioned problems can be solved brilliantly, and have reached the present invention.
- the present invention is a liquid crystal display device comprising a liquid crystal layer and a pair of substrates sandwiching the liquid crystal layer, wherein at least one of the pair of substrates has an electrode for applying a voltage to the liquid crystal layer, and the liquid crystal
- the electrode for applying a voltage to the layer has two or more linear portions
- the substrate having the electrode for applying a voltage to the liquid crystal layer among the pair of substrates includes the two or more lines with an insulating film interposed therebetween.
- 1 is a liquid crystal display device (hereinafter also referred to as a first liquid crystal display device of the present invention) having a floating electrode that overlaps at least two of the shape portions.
- the present invention is also a liquid crystal display device comprising a liquid crystal layer and a pair of substrates sandwiching the liquid crystal layer, wherein at least one of the pair of substrates has an electrode for applying a voltage to the liquid crystal layer, and the liquid crystal layer
- the electrode for applying a voltage to the substrate has two or more linear portions
- the substrate having the electrode for applying a voltage to the liquid crystal layer among the pair of substrates is at least two of the two or more linear portions.
- a liquid crystal display device (hereinafter referred to as the second liquid crystal display of the present invention), which is disposed in a layer different from the electrode for applying a voltage to the liquid crystal layer with an insulating film interposed therebetween. It is also called a device.)
- the first and second liquid crystal display devices of the present invention include a liquid crystal layer and a pair of substrates that sandwich the liquid crystal layer. By providing wirings, electrodes, semiconductor elements, and the like on the pair of substrates, a voltage can be applied to the liquid crystal layer and the orientation of liquid crystal molecules can be controlled.
- the liquid crystal layer is preferably composed of nematic liquid crystal molecules having positive or negative dielectric anisotropy.
- the direction of the electric field is a direction horizontal to the substrate surface (transverse electric field) or a direction perpendicular to the substrate surface (vertical electric field).
- the initial inclination of the liquid crystal molecules can be defined in a certain direction. It is not limited whether the initial inclination of the liquid crystal molecules is perpendicular to the substrate surface or horizontal.
- At least one of the pair of substrates has an electrode for applying a voltage to the liquid crystal layer, and the electrode for applying a voltage to the liquid crystal layer has two or more linear portions.
- the electrode for applying a voltage to the liquid crystal layer include a pixel electrode to which a signal voltage is supplied, a common electrode to which a common voltage is supplied, and the like.
- the pixel electrode and the common electrode are provided in a pair, the tilt of the liquid crystal molecules can be controlled by the influence of the electric field formed between the pixel electrode and the common electrode, and thus the liquid crystal layer is transmitted. The degree of birefringence of light can be controlled.
- the electrode for applying a voltage to the liquid crystal layer has two or more linear portions, which enables precise control of the tilt of the liquid crystal molecules.
- a substrate having an electrode for applying a voltage to the liquid crystal layer overlaps at least two of the two or more linear portions with an insulating film interposed therebetween. It has a floating electrode.
- the floating electrode is an electrically isolated electrode that is not electrically connected to another conductive member. Therefore, the floating electrode and the electrode for applying a voltage to the liquid crystal layer are not electrically connected, and are arranged in different layers with an insulating film interposed therebetween.
- the floating electrode may overlap with at least two of the two or more linear portions, or may overlap with three or more. Moreover, it is not necessary to overlap with the whole of the two or more linear portions.
- the floating electrode overlaps with a part of each of the two or more linear portions.
- the floating electrode since the floating electrode is arranged so as to overlap with two or more linear portions, disconnection occurs in a part of the linear portion and the fragment is disconnected from the electrode that applies a voltage to the liquid crystal layer.
- irradiate laser to the other linear part where the disconnection does not occur and the floating electrode melt the linear part where the disconnection does not occur and the floating electrode, and electrically connect to each other.
- the fragment and the floating electrode are melted and electrically connected to each other, so that the fragment can be corrected to ensure electrical connection.
- the pixel is recognized as a pixel defect, specifically as a black dot, and the display quality of the liquid crystal display device is deteriorated. Therefore, according to the first liquid crystal display device of the present invention, it is possible to obtain a liquid crystal display device that can easily cope with a disconnection. This also makes it possible to form the two or more linear portions more narrowly for the purpose of improving the transmittance.
- substrates has a bridge
- the bridging electrode is arranged in a layer different from the electrode for applying a voltage to the liquid crystal layer with an insulating film interposed therebetween.
- the bridging electrode is an electrode that is electrically connected to another conductive member and can ensure electrical continuity between the certain conductive member and the other conductive member.
- the bridge electrode only needs to overlap with at least two of the two or more linear portions, and may overlap with three or more. Moreover, it is not necessary to overlap with the whole of the two or more linear portions.
- the bridging electrode overlaps with a part of each of the two or more linear portions. Preferably it is.
- the two or more linear portions are connected to each other via the bridging electrode, a disconnection occurs in a part of the linear portion, and the voltage applied to the liquid crystal layer is disconnected from the electrode. Since the electrical connection between the fragment and the electrode for applying a voltage to the liquid crystal layer is ensured through the bridging electrode, no pixel defect occurs. Therefore, according to the second liquid crystal display device of the present invention, it is possible to obtain a highly reliable liquid crystal display device that does not cause a problem even if a disconnection occurs. This also makes it possible to make the two or more linear portions thinner for the purpose of improving the transmittance.
- the configuration of the first and second liquid crystal display devices of the present invention is not particularly limited by other components as long as such components are formed as essential.
- the floating electrode or the bridging electrode is preferably linear. From the viewpoint of overlapping with a part of each of the two or more linear portions and ensuring the transmittance, it is preferable to have an elongated shape. Moreover, if it is linear, it can become the reference
- the floating electrode is preferably made of a single metal.
- a conductive member made of a single metal is more easily dissolved by laser irradiation than a conductive member made of, for example, a metal oxide, metal nitride or the like, so that correction is easier.
- the floating electrode or the bridging electrode overlaps each end of the two or more linear portions. By overlapping with the end of each linear portion, it is possible to cover a wider range that can be corrected with respect to a region where disconnection may occur.
- the width of the floating electrode is preferably substantially the same as or wider than the width of each of the two or more linear portions.
- the width of the portion overlapping the two or more linear portions of the floating electrode is wider than the width of the portion not overlapping the two or more linear portions of the floating electrode.
- the liquid crystal display device includes a plurality of floating electrodes or a plurality of bridge electrodes, and at least one of the plurality of floating electrodes or the plurality of bridge electrodes includes one end of each of the two or more linear portions. It is preferable that at least one other portion overlaps with the other end of each of the two or more linear portions.
- each linear portion has two end portions, it is preferable that the floating electrodes are overlapped on both end portions in that the range to be subjected to laser irradiation is widened.
- the bridging electrodes are superimposed on both ends in that the range that can be covered by the bridging electrodes is widened.
- the liquid crystal display device includes a plurality of floating electrodes or a plurality of bridging electrodes, and at least two of the plurality of floating electrodes or the plurality of bridging electrodes have one end portion of each of the two or more linear portions. It is preferable to overlap. By increasing the number of floating electrodes, options for laser irradiation are expanded and correction becomes easier. Further, by increasing the number of bridging electrodes, the possibility of occurrence of defects due to disconnection can be reduced.
- the substrate having an electrode for applying a voltage to the liquid crystal layer has a scanning wiring and a signal wiring, and the floating electrode or the bridging electrode is disposed within a range surrounded by the scanning wiring and the signal wiring. Is preferred.
- the floating electrode or the bridging electrode Is preferably contained within the sub-pixel, that is, formed in units of sub-pixels.
- the floating electrode is preferably arranged at a position farther from the liquid crystal layer than an electrode for applying a voltage to the liquid crystal layer.
- the floating electrode can be used as a shielding member for an electric field with respect to an electrode for applying a voltage to the liquid crystal layer.
- the potential of other wirings and electrodes changes. It is possible to reduce the influence on the potential of the electrode that applies a voltage to the liquid crystal layer, and to prevent the alignment of the liquid crystal molecules in the liquid crystal layer from being disturbed.
- the ends of the two or more linear portions preferably overlap with the light shielding film. Since the region in the liquid crystal layer that overlaps the ends of the comb teeth of the comb-shaped electrode is a region where alignment disorder is likely to occur, such a region is preferably shielded from light.
- the electrode for applying a voltage to the liquid crystal layer is a comb electrode having a handle portion and two or more comb teeth protruding from the handle portion, and the two or more linear portions are the two or more comb teeth. It is preferable. According to the present invention, even when the electrode for applying a voltage to the liquid crystal layer has a comb shape, the problem of disconnection in the comb teeth can be solved.
- the liquid crystal display device preferably includes a pair of the comb-shaped electrodes, and the pair of comb-shaped electrodes are configured such that the comb teeth are engaged with each other with a certain interval.
- the electric field generated when a potential difference is applied between such a pair of comb-shaped electrodes is an arch-shaped lateral electric field. Since the liquid crystal molecules exhibit such orientation according to the direction of the electric field, the same display is performed regardless of the front direction and the oblique direction with respect to the substrate surface, and a wide viewing angle characteristic is obtained.
- the floating electrode overlaps with both comb teeth of the pair of comb electrodes.
- the floating electrode can be overlapped with both of the comb teeth of the pair of comb-shaped electrodes, it is possible to correspond to both electrodes with one floating electrode, which is an efficient configuration.
- the floating electrode or the bridging electrode preferably overlaps the comb teeth of the comb electrode having the larger number of comb teeth among the pair of comb electrodes. Since the more comb teeth there is, the more likely the disconnection will occur. Of the pair of comb electrodes, the comb electrode having at least the number of comb teeth and the floating electrode or the bridging electrode should be overlapped. Is preferred.
- the floating electrode or the bridging electrode overlaps a comb tooth of a comb electrode having a narrower comb tooth among the pair of comb electrodes. Since the thinner the comb teeth, the easier the disconnection occurs. Of the pair of comb-shaped electrodes, it is preferable that at least the comb-shaped electrode with the narrowest comb teeth overlaps the floating electrode or the bridging electrode.
- the liquid crystal display device of the present invention it is possible to perform correction for ensuring conduction or suppress occurrence of a pixel defect even if an electrode for applying a voltage to the liquid crystal layer is disconnected. .
- FIG. 6 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display devices of Embodiments 1-1, 1-9, and 1-10.
- FIG. 2 is a schematic cross-sectional view of a TFT substrate along the line AB in FIG. 1.
- 1 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 1-1, showing a state in which no voltage is applied to the liquid crystal layer.
- 1 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 1-1, showing a state in which a voltage is applied to a liquid crystal layer.
- FIG. 1 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 1-1, showing a state in which a voltage is applied to a liquid crystal layer.
- FIG. 3 is a schematic plan view showing a state of correction by laser irradiation when a disconnection occurs in the liquid crystal display device of Embodiment 1-1.
- 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 1-2.
- FIG. 6 is a schematic plan view showing a state of correction by laser irradiation when a disconnection occurs in the liquid crystal display device of Embodiment 1-2.
- 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-3.
- FIG. 6 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-4.
- FIG. FIG. 6 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-5.
- FIG. 10 is a schematic cross-sectional view of the TFT substrate along the line CD in FIG. 9.
- FIG. 6 is a schematic plan view when a disconnection occurs in the liquid crystal display device of Embodiment 1-5.
- FIG. 6 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-6.
- FIG. 8 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 1-7.
- FIG. 14 is a schematic cross-sectional view of the TFT substrate along the line EF in FIG. 13.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-8.
- FIG. 9 is a schematic cross-sectional view of the TFT substrate along the line AB in FIG. 1 showing the liquid crystal display device of Embodiment 1-9.
- FIG. 10 is a schematic cross-sectional view of the liquid crystal display device of Embodiment 1-10, showing a state in which no voltage is applied to the liquid crystal layer.
- FIG. 10 is a schematic cross-sectional view of the liquid crystal display device of Embodiment 1-10, showing a state in which a voltage is applied to the liquid crystal layer.
- FIG. 11 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display devices of Embodiments 2-1 and 2-11.
- FIG. 50 is a schematic cross-sectional view of the TFT substrate along the line GH in FIG. 18 and a schematic cross-sectional view of the TFT substrate along the line MN in FIG. 46.
- FIG. 6 is a schematic plan view showing a state of correction by laser irradiation when a disconnection occurs in a pixel electrode in the liquid crystal display device of Embodiment 2-1.
- FIG. 6 is a schematic plan view showing a state of correction by laser irradiation when a disconnection occurs in a common electrode in the liquid crystal display device of Embodiment 2-1.
- FIG. 6 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 2-2.
- FIG. 6 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-3.
- FIG. 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-4.
- FIG. 6 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 2-5.
- FIG. 10 is a schematic plan view when a disconnection occurs in the liquid crystal display device according to Embodiment 2-5.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 2-6.
- FIG. 8 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 2-7.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 2-8.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 2-9.
- FIG. 12 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 2-10.
- FIG. 56 is a schematic cross-sectional view of the TFT substrate along line IJ in FIG. 31 and a schematic cross-sectional view of the TFT substrate along line OP in FIG.
- it is a plane schematic diagram showing the form which used the bridge
- Embodiment 2-4 it is a plane schematic diagram showing the form which used the bridge electrode instead of the floating electrode.
- FIG. 11 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display devices of Embodiments 3-1, 3-9, and 3-10.
- FIG. 37 is a schematic cross-sectional view of a TFT substrate along the line KL in FIG. 36.
- FIG. 6 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 3-2. 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 3-3.
- FIG. 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 3-4.
- FIG. 11 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 3-5.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 3-6.
- 7 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 3-7.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 3-8.
- FIG. 37 is a schematic cross-sectional view of the TFT substrate along the line KL in FIG. 36, which represents the liquid crystal display device according to Embodiment 3-9.
- FIG. 11 is a schematic plan view of a sub-pixel unit of a TFT substrate provided in the liquid crystal display devices of Embodiments 4-1 and 4-11.
- FIG. 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 4-2.
- FIG. 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-3.
- FIG. 4 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-4.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-5.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-6.
- FIG. 8 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-7.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-8.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-9.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 4-10.
- FIG. 14 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 4-12.
- FIG. 15 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display devices of Embodiments 5-1 and 5-14.
- FIG. 58 is a schematic cross-sectional view of a TFT substrate along the QR line in FIG. 57.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-2.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-3.
- FIG. 11 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-4.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-5.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-6.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-7.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-8.
- FIG. 10 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-9.
- FIG. 11 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-10.
- FIG. 12 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-11.
- FIG. 15 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-12.
- FIG. 16 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-13.
- FIG. 18 is a schematic plan view of a sub-pixel unit of a TFT substrate included in a liquid crystal display device according to Embodiment 5-15.
- FIG. 16 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 5-15, showing a state in which no voltage is applied to the liquid crystal layer.
- FIG. 16 is a schematic cross-sectional view of a liquid crystal display device according to Embodiment 5-15, showing a state in which a voltage is applied to the liquid crystal layer. It is a plane schematic diagram showing the mode of disconnection in the conventional liquid crystal display.
- Embodiment 1 Hereinafter, the liquid crystal display device of the first embodiment will be described by dividing it into ten embodiments 1-1 to 1-10.
- Each liquid crystal display device of Embodiment 1 is characterized in that both the pixel electrode and the common electrode have comb teeth on one side with respect to one handle.
- FIG. 1 is a schematic plan view of a sub-pixel unit of a TFT substrate provided in the liquid crystal display device according to Embodiment 1-1.
- FIG. 2 is a schematic cross-sectional view of the TFT substrate along the line AB in FIG.
- the pixel electrode 21 is connected to a thin film transistor (TFT) 26 including a semiconductor layer, and is further connected to a source wiring (signal wiring) 24 via the TFT 26.
- the TFT 26 is also connected to a gate wiring (scanning wiring) 25, and the source wiring 24 and the pixel electrode 21 are electrically connected to each other at the timing of the gate voltage applied to the semiconductor layer through the gate wiring 25. Is applied to the pixel electrode 21.
- Each of the pixel electrode 21 and the common electrode 22 has, as a basic configuration, a handle portion serving as a trunk and a comb tooth portion protruding from the handle.
- a plurality of source wirings 24 are provided extending in the vertical direction substantially parallel to each other.
- a plurality of gate wirings 25 are provided so as to extend in the horizontal direction substantially parallel to each other, and intersect with each source wiring 24.
- the source wiring 24 and the gate wiring 25 are arranged in different layers via an insulating film.
- the pixel electrode 21 and the common electrode 22 are disposed in the same layer, but are disposed in different layers through an insulating film from the layer in which the source wiring 24 is formed and the layer in which the gate wiring 25 is formed. Has been.
- the TFT substrate 11 includes a glass substrate 31, a first insulating film 32 provided on the glass substrate 31, and a second insulating film 33 provided on the first insulating film 32. And have. Between the first insulating film 32 and the second insulating film 33, a source wiring 24 and a correction floating electrode 61 to be described later are provided. On the second insulating film 33, there is a pair of comb-shaped electrodes in which the comb teeth are alternately meshed at a predetermined interval. One of the pair of comb-shaped electrodes is a pixel electrode 21 to which a signal voltage is applied through a signal wiring 24, and the other is a common electrode 22 to which a common voltage is applied through a common wiring.
- the material of the pixel electrode 21 and the common electrode 22 metal oxides such as light-transmitting indium tin oxide (ITO) and indium zinc oxide (IZO) are preferably used.
- the widths of the comb teeth of the pixel electrode 21 and the common electrode 22 are preferably as narrow as possible. For example, both are formed to have a width of 2 to 8 ⁇ m.
- the distance between the comb teeth of the pixel electrode 21 and the comb teeth of the common electrode 22 is preferably 2 to 10 ⁇ m.
- a vertical alignment film 36 that defines an initial inclination of liquid crystal molecules is disposed on the pixel electrode 21 and the common electrode 22 disposed.
- the thickness of the first insulating film 32 is preferably 0.2 to 0.6 ⁇ m, and the thickness of the second insulating film 33 is preferably 0.3 to 3.0 ⁇ m.
- the pixel electrode 21 has a thickness of 0.05 to 0.15 ⁇ m
- the common electrode 22 has a thickness of 0.05 to 0.15 ⁇ m
- the source wiring 24 has a thickness of 0.1 to 0.3 ⁇ m.
- the thickness of the floating electrode 61 is preferably 0.1 ⁇ m or more.
- the thickness of the second insulating film 33 is preferably less than 0.5 ⁇ m from the viewpoint of ease of correction by laser irradiation, and the influence of the voltage change from other wiring on the pixel electrode 21 or the common electrode 22 is affected. From the viewpoint of prevention, it is preferably 2 ⁇ m or more.
- FIG. 1 it has a correction floating electrode 61 that overlaps the ends of the comb teeth (linear portions) of the pixel electrode 21 and the ends of the comb teeth (linear portions) of the common electrode 22.
- the floating electrode 61 has a linear shape extending in a direction substantially perpendicular to the length direction of the comb teeth of the pixel electrode 21 and the length direction of the comb teeth of the common electrode 22. It overlaps with both the ends of the comb teeth and the ends of the comb teeth of the common electrode 22.
- the floating electrode 61 is disposed in a region surrounded by the gate wiring (scanning wiring) 25 and the source wiring (signal wiring) 24, that is, in one subpixel. As shown in FIG.
- the floating electrode 61 is disposed in the same layer as the source wiring 24, but is isolated from the source wiring 24 and the gate wiring 25 with an insulating film interposed therebetween, and each is electrically isolated. is doing.
- the floating electrode 61 is not particularly limited as long as it is a conductive material, and may or may not have translucency. From the viewpoint of meltability by laser irradiation, tantalum (Ta), molybdenum It is preferably a simple metal such as (Mo) or aluminum (Al).
- the voltage applied to the gate wiring 25 or the source wiring 24 may be switched between positive and negative, and at that time, the pixel is pulled by the changed voltage.
- the voltage supplied to the electrode 21 or the common electrode 22 may change.
- the floating electrode 61 By arranging the floating electrode 61 below the pixel electrode 21 or the common electrode 22 via the second insulating film 33, the gate wiring 25 or The influence of the change in the voltage applied to the source wiring 24 can be reduced, and the floating electrode 61 can be used as an electric field shielding member.
- the floating electrode 61 extends in a direction substantially perpendicular to the length direction of the comb teeth of the pixel electrode 21 and the common electrode 22, the electric field of the electric field in a wide range with respect to the pixel electrode 21 and the common electrode 22. A shielding effect can be obtained.
- the floating electrode 61 preferably has light transmittance.
- the portion irradiated with laser does not have a flat shape for both the insulating film and the metal, which may cause alignment disorder in the liquid crystal molecules. Therefore, it is preferable that the floating electrode 61 has a light shielding property from the viewpoint of shielding the area overlapping the corrected portion.
- the width of the floating electrode 61 is preferably 2 ⁇ m or more. From the viewpoint of ease of correction by laser irradiation and the shielding effect of the electric field, the width of the comb teeth of the pixel electrode 21 and the width of the comb teeth of the common electrode 22 are preferred. It is preferably wider than the width.
- the common electrode 22 is connected to the common wiring.
- the gate wiring 25 and the source wiring 24 are arranged so as to intersect each other, and a region surrounded by the gate wiring 25 and the source wiring 24 constitutes one subpixel.
- One color filter corresponds to one subpixel, and one pixel is constituted by a plurality of subpixels.
- the pixel electrode 21 and the common electrode 22 may be extended to a region overlapping with the gate wiring 25 or the source wiring 24, so that the aperture ratio can be further increased.
- Embodiment 1-5 described later, a form in which a bridging electrode is used instead of the floating electrode is shown.
- Embodiment 1-1 Can be said to have a configuration with a higher yield.
- FIGS. 3A and 3B are schematic cross-sectional views of the liquid crystal display device of Embodiment 1-1, and particularly show in detail the behavior of liquid crystal molecules.
- 3A shows a state where no voltage is applied to the liquid crystal layer
- FIG. 3B shows a state where a voltage is applied to the liquid crystal layer.
- the liquid crystal display device of Embodiment 1 includes a liquid crystal display panel 1 having a liquid crystal layer 13 and a pair of substrates 11 and 12 that sandwich the liquid crystal layer 13 therebetween. More specifically, the liquid crystal display device of Embodiment 1 includes these members in the order of the TFT substrate 11, the liquid crystal layer 13, and the counter substrate 12 from the back side to the observation surface side.
- the liquid crystal layer 13 contains nematic liquid crystal having positive dielectric anisotropy ( ⁇ > 0).
- the liquid crystal display device of Embodiment 1 includes a backlight unit on the back side of the liquid crystal display panel 1.
- the TFT substrate 11 has a glass substrate 31, and has a pixel electrode 21 and a common electrode 22 on the liquid crystal layer 13 side of the glass substrate 31.
- the pixel electrode 21 and the common electrode 22 are alternately arranged in the horizontal direction when viewed from these cross-sectional directions.
- the counter substrate 12 includes a glass substrate 41 and a color filter 42.
- the color filter 42 is disposed on the liquid crystal layer 13 side of the glass substrate 41.
- the color filter 42 is configured by a filter having a red, green, or blue color, and one color filter corresponds to one subpixel.
- One pixel is configured by a combination of red, green, and blue sub-pixels. Note that the color of the color filter 42 is not necessarily limited to these colors. Further, the number of colors of the color filter is not limited to three, and may be four or more.
- a black black matrix (BM) is arranged between the color filters having different colors to prevent color mixing and light leakage.
- the liquid crystal molecules 51 exhibit homeotropic alignment, that is, vertical alignment with respect to the pair of substrates 11 and 12 when no voltage is applied. More specifically, the major axes of the rod-like liquid crystal molecules 51 are oriented in a direction substantially perpendicular to the surfaces of the substrates 11 and 12, and all the liquid crystal molecules 51 are regularly arranged in the same direction. It is out.
- the orientation of the liquid crystal molecules 51 is changed along the arch-shaped lateral electric field formed between these electrodes. Change occurs.
- the group of liquid crystal molecules 51 affected by the electric field in this way exhibits a bend alignment in the lateral direction as a whole having symmetry with respect to the intermediate region between the comb teeth (the pixel electrode 21 and the common electrode 22).
- the liquid crystal molecules 51 located at the end of the arch-shaped lateral electric field that is, the liquid crystal molecules 51 located immediately above the pixel electrode 21 and the common electrode 22 are affected by the change in the electric field.
- liquid crystal molecules 51 located in the intermediate region between the comb teeth (the pixel electrode 21 and the common electrode 22), which is the farthest from the comb tooth among the regions between the comb teeth (the pixel electrode 21 and the common electrode 22), are also included. , It remains oriented in a direction substantially perpendicular to the surfaces of the pair of substrates 11 and 12.
- Both the TFT substrate 11 and the counter substrate 12 have polarizing plates 37 and 44.
- the polarizing plate 37 is disposed on the rearmost side of the TFT substrate 11, and in the counter substrate 12, the polarizing plate 44 is disposed on the most observation surface side of the counter substrate 12.
- These polarizing plates 37 and 44 can convert natural light emitted from the light source into polarized light that vibrates in a certain direction (polarization axis direction).
- the liquid crystal molecules 51 are oriented in a direction substantially perpendicular to the surfaces of the substrates 11 and 12 when no voltage is applied. Therefore, the transmission axis of the polarizing plate 37 of the TFT substrate 11 and the transmission axis of the polarizing plate 44 of the counter substrate 12 are in a crossing relationship (crossed nicols). The light transmitted through is blocked by these polarizing plates 37 and 44. In this way, by setting the initial alignment of the liquid crystal molecules 51 to the vertical alignment and the polarizing plates 37 and 44 to the crossed Nicols arrangement, a normally black mode display mode with a high contrast ratio can be obtained.
- the liquid crystal molecules 51 exhibit orientation along the transverse electric field, and at this time, the direction of vibration direction (polarization axis) of the light transmitted through the liquid crystal layer 13 changes. Therefore, the light after passing through the liquid crystal layer 13 can pass through the polarizing plate 44 on the counter substrate 12 side, and as a result, the light passes through the liquid crystal display panel 1 and is used as display light.
- the control method of the liquid crystal display device according to Embodiment 1-1 is a mode in which the alignment control of liquid crystal molecules is performed using a lateral electric field.
- the liquid crystal display device has a vertical alignment film and has no voltage mark. Since the liquid crystal molecules 51 exhibit homeotropic alignment, that is, vertical alignment with respect to the pair of substrates 11 and 12 when heated, the liquid crystal molecules 51 are homogeneously aligned, that is, the pair of substrates 11 when no voltage is applied. , 12 planes are different from the so-called IPS mode, which shows horizontal orientation. This also applies to the liquid crystal display devices of Embodiments 1-2 to 1-9 described later.
- FIG. 4 is a schematic plan view showing a state of correction by laser irradiation when disconnection occurs in the liquid crystal display device of Embodiment 1-1.
- an apparatus for performing laser correction it is preferable to use an apparatus in which an optical microscope and a laser oscillator are integrated.
- the floating electrode 61 is arranged in a region overlapping with the end of the pixel electrode 21.
- an electric field is not formed between the comb teeth of the pixel electrode 21 where the disconnection has occurred and the comb teeth of the common electrode 22 facing the disconnection.
- a sufficient voltage is not applied to a region overlapping the pixel in the layer 13. Then, since the alignment of the liquid crystal molecules 51 remains in the vertical alignment, the display is black.
- the laser device 62 is connected to the end portion of the comb electrode of the pixel electrode 21 where the disconnection has occurred and the portion of the floating electrode 61 that overlaps the end portion of the comb tooth of the pixel electrode 21 where the disconnection occurs. These are melted by a laser to make them conductive, and further, the floating electrode 61 that overlaps the end of the comb teeth of the pixel electrode 21 where no disconnection occurs and the end of the comb teeth of the pixel electrode 21 where disconnection does not occur. These portions are melted with a laser using a laser device 62 and are made conductive, so that a signal voltage can be supplied to the entire pixel electrode 21 through the floating electrode 61 and pixel defects are prevented from occurring. be able to.
- FIG. 5 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 1-2. As shown in FIG. 5, in the liquid crystal display device according to Embodiment 1-2, the floating electrode 61 is disposed in a region overlapping with the end portion of the common electrode 22.
- FIG. 6 is a schematic plan view showing a state of correction by laser irradiation when disconnection occurs in the liquid crystal display device of Embodiment 1-2.
- a disconnection occurs in a part of the comb teeth of the common electrode 22
- an electric field is generated between the comb teeth of the common electrode 22 where the disconnection has occurred and the comb teeth of the pixel electrode 21 facing the disconnection. Therefore, a sufficient voltage is not applied to a region overlapping the pixel in the liquid crystal layer 13. Then, since the alignment of the liquid crystal molecules 51 remains in the vertical alignment, the display is black.
- the laser device 62 is used to laser-combine the comb teeth of the common electrode 22 in which the disconnection has occurred and the portion of the floating electrode 61 that overlaps the ends of the comb teeth of the common electrode 22 in which the disconnection has occurred. Then, these are made conductive, and further, the comb teeth of the common electrode 22 in which no disconnection has occurred and the portion of the floating electrode 61 that overlaps the ends of the comb teeth of the common electrode 22 in which no disconnection has occurred. By melting them with a laser using the device 62 and conducting them, a common voltage can be supplied to the entire common electrode 22 via the floating electrode 61, and pixel defects can be prevented from occurring.
- FIG. 7 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-3.
- the correction electrode is arranged in a region overlapping with both the end portion of the pixel electrode and the end portion of the common electrode.
- FIG. 8 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-4.
- two floating electrodes 61 are arranged in the region overlapping with both the end of the pixel electrode 21 and the end of the common electrode 22, respectively. Yes. These two floating electrodes 61 may be arranged in the same layer or in different layers.
- FIG. 9 is a schematic plan view of one sub-pixel unit of the TFT substrate included in the liquid crystal display device according to Embodiment 1-5.
- FIG. 10 is a schematic cross-sectional view of the TFT substrate along the line CD in FIG.
- contact holes 64 are formed at the respective ends of the comb teeth of the pixel electrode 21, and bridging is performed via the contact holes 64.
- Each of the electrodes 63 is connected.
- the bridging electrode 63 is linear, and is disposed so as to overlap with each of the end portions of the pixel electrode 21.
- FIG. 11 is a schematic plan view when a disconnection occurs in the liquid crystal display device of Embodiment 1-5. As shown in FIG. 11, even if a disconnection occurs in a part of the comb teeth of the pixel electrode 21, no disconnection occurs between the comb teeth of the pixel electrode 21 in which the disconnection has occurred via the bridging electrode 63. Since the comb electrodes of the pixel electrode 21 are connected and a signal voltage can be supplied to the entire pixel electrode 21, no pixel defect occurs.
- the bridging electrode 63 Since it is not necessary to modify the bridging electrode 63 by laser irradiation, it is preferable to use a metal oxide film such as ITO as a material of the bridging electrode 63 in order to ensure transmittance. Further, the relationship between the width of the bridging electrode 63 and the width of the comb teeth of the pixel electrode 21 or the common electrode 22 is not particularly limited.
- FIG. 12 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 1-6. As shown in FIG. 12, in the liquid crystal display device of Embodiment 1-6, both the comb teeth end of the pixel electrode 21 and the comb teeth end of the common electrode 22 are tapered. A floating electrode 61 is disposed in a region overlapping with the end.
- the width of the comb teeth at the tapered portion at the end of the pixel electrode 21 is preferably 1 ⁇ m or more smaller than the width of the comb teeth at the non-tapered portion of the pixel electrode 21.
- FIG. 13 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 1-7.
- FIG. 14 is a schematic cross-sectional view of the TFT substrate along the line EF in FIG.
- the light shielding film 27 is disposed on the lower layer of the end portion of the comb teeth of the pixel electrode 21, that is, on the lower side of the floating electrode 61. ing.
- the thickness of the light shielding film 27 is preferably 0.1 ⁇ m or more.
- the portions irradiated with the laser are not flat in both the insulating film and the metal, and thus alignment disorder may occur in the liquid crystal molecules.
- the light shielding film 27 by disposing the light shielding film 27 at a position overlapping with the end portions of the comb teeth of the pixel electrode 21, it is possible to prevent an adverse effect on the display quality due to the alignment disorder.
- FIG. 15 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 1-8.
- the width of the portion overlapping the end of the comb teeth of the pixel electrode 21 of the floating electrode 61 is the width of the comb teeth of the pixel electrode 21 of the floating electrode 61. It is formed wider than the width of the portion that does not overlap the end.
- Embodiment 1-9 In the liquid crystal display device of Embodiment 1-9, the pixel electrode and the common electrode are arranged in different layers. Therefore, a schematic plan view of one subpixel unit of the TFT substrate included in the liquid crystal display device of Embodiment 1-9 is the same as FIG. On the other hand, FIG. 16 is a schematic cross-sectional view of the TFT substrate along the line AB of FIG. 1 showing the liquid crystal display device of Embodiment 1-9, which is different from FIG.
- the TFT substrate 11 includes a glass substrate 31, a first insulating film 32 provided on the glass substrate 31, and a second insulating film 33 provided on the first insulating film 32. And have.
- a source wiring 24 and a floating electrode 61 are provided between the first insulating film 32 and the second insulating film 33.
- the pixel electrode 21 is disposed on the second insulating film 33, and a third insulating film 34 is provided on the pixel electrode 21.
- the common electrode 22 is disposed on the third insulating film 34.
- a vertical alignment film 36 that defines an initial inclination of liquid crystal molecules is disposed on the common electrode 22.
- the pixel electrode 21 and the common electrode 22 in which the comb teeth are alternately meshed with each other at a certain interval are arranged.
- a transverse electric field can be formed in the layer, and the alignment of liquid crystal molecules can be controlled.
- Any of the pixel electrode 21 and the common electrode 22 may be disposed in a layer closer to the liquid crystal layer.
- the second insulating film 33 has a thickness of 0.3 to 3.0 ⁇ m
- the third insulating film 34 has a thickness. Is preferably 0.3 to 3.0 ⁇ m.
- Embodiment 1-10 The liquid crystal display device of Embodiment 1-10 uses a horizontal alignment film instead of the vertical alignment film as shown in Embodiments 1-1 to 1-9.
- the liquid crystal molecule control method of the liquid crystal display device of Embodiment 1-10 is the IPS mode. Therefore, the schematic plan view of the sub-pixel unit of the TFT substrate included in the liquid crystal display device of Embodiment 1-10 is the same as FIG.
- FIGS. 17A and 17B are schematic cross-sectional views of the liquid crystal display device of Embodiment 1-10, and particularly show the behavior of liquid crystal molecules in detail.
- FIG. 17-1 shows a state where no voltage is applied to the liquid crystal layer
- FIG. 17-2 shows a state where a voltage is applied to the liquid crystal layer.
- each major axis of the rod-like liquid crystal molecules 51 is a direction substantially horizontal to the substrate surface, and the major axis direction of the liquid crystal molecules 51 is oriented in a direction substantially parallel to the comb tooth direction.
- the liquid crystal molecules 51 are regularly arranged in the same direction.
- Embodiments 1-1 to 1-10 have been described.
- a bridging electrode instead of a floating electrode as in Embodiment 1-5.
- the respective features of Embodiments 1-1 to 1-10 can be combined with each other.
- Embodiment 2 Hereinafter, the liquid crystal display device according to the second embodiment will be described in 11 forms of the embodiments 2-1 to 2-11.
- Each liquid crystal display device of Embodiment 2 is characterized in that the pixel electrode has comb teeth on one side with respect to one handle, whereas the common electrode has comb teeth on both sides with respect to one handle. Have.
- Embodiments 2-1 to 2-11 are all in a mode in which the alignment control of liquid crystal molecules is performed using a lateral electric field.
- Embodiments 2-1 to 2-10 when no voltage is applied, In contrast to the control mode in which the liquid crystal molecules exhibit homeotropic alignment, that is, vertical alignment with respect to a pair of substrate surfaces, in Embodiment 2-11, the liquid crystal molecules are homogeneously aligned when no voltage is applied, that is, These are different in that they are so-called IPS modes that show horizontal orientation with respect to a pair of substrate surfaces.
- FIG. 18 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 2-1.
- FIG. 19 is a schematic cross-sectional view of the TFT substrate along the line GH in FIG.
- the pixel electrode 21 and the common electrode 22 are arranged in different layers, the pixel electrode 21 is arranged closer to the liquid crystal layer, and the common electrode 22 is arranged in a layer farther from the liquid crystal layer.
- the liquid crystal display device of Embodiment 2-1 has a floating electrode 61 for correction, and the floating electrode 61 includes a comb tooth end of the pixel electrode 21 and a comb of the common electrode 22. It arrange
- the single floating electrode 61 can be used as a correction electrode for both the pixel electrode 21 and the common electrode 22.
- FIG. 20 is a schematic plan view showing a state of correction by laser irradiation when the pixel electrode is disconnected in the liquid crystal display device of Embodiment 2-1.
- FIG. 21 is a schematic plan view showing a state of correction by laser irradiation when the common electrode is disconnected in the liquid crystal display device of Embodiment 2-1.
- FIG. 22 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 2-2.
- the floating electrode 61 shorter than the length of the floating electrode 61 in the liquid crystal display device of the embodiment 2-1 is disposed. Used for use. By reducing the length of the floating electrode 61, the transmittance is further improved.
- FIG. 23 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-3. As shown in FIG. 23, in the liquid crystal display device of Embodiment 2-3, in addition to the region overlapping the end of the pixel electrode 21 and one end of the comb of the common electrode 22, the comb of the common electrode 22 A floating electrode 61 is also disposed in a region overlapping with the other end.
- FIG. 24 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-4. As shown in FIG. 24, in the liquid crystal display device of Embodiment 2-4, the region overlapping the both ends of the comb teeth of the pixel electrode 21 and both ends of the comb teeth of the common electrode 22 Two floating electrodes 61 are arranged in each case.
- FIG. 25 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-5.
- contact holes 64 are formed at the respective ends of the comb teeth of the pixel electrode 21, and the bridging electrode 63 is formed through the contact holes 64.
- the bridging electrode 63 has a linear shape and is disposed so as to overlap with each of the end portions of the comb teeth of the pixel electrode 21 and one end portion of the comb teeth of the common electrode 22.
- FIG. 26 is a schematic plan view when a disconnection occurs in the liquid crystal display device of Embodiment 2-5. As shown in FIG. 26, even if a break occurs in a part of the comb teeth of the pixel electrode 21, no break occurs in the comb teeth of the pixel electrode 21 where the break occurs via the bridging electrode 63. Since the comb electrodes of the pixel electrode 21 are connected and a signal voltage can be supplied to the entire pixel electrode 21, no pixel defect occurs. As a material of the bridging electrode 63, the same material as in the case of Embodiment 1-5 can be used.
- FIG. 27 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-6.
- contact holes 64 are formed at the ends of the comb teeth of the pixel electrode 21 and the comb teeth of the common electrode 22.
- the bridging electrodes 63 are linear, and are arranged so as to overlap two at each of the end portions of the comb teeth of the pixel electrode 21 and one end portion of the comb teeth of the common electrode 22.
- One of the two bridging electrodes 63 is connected only to the pixel electrode 21 via the contact hole 64, and the other is connected only to the common electrode 22 via the contact hole 64.
- the pixel electrode 21 and the common electrode 22 can be connected via one of the bridging electrodes 63 regardless of whether the pixel electrode 21 or the common electrode 22 is disconnected. Since the signal voltage can be supplied to the entire electrode 21 and the common voltage can be supplied to the entire common electrode 22 through the other of the bridging electrodes 63, the possibility of pixel defects can be reduced.
- FIG. 28 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 2-7.
- the liquid crystal display device of Embodiment 2-7 half of the comb teeth of the pixel electrode 21 and one comb tooth of the common electrode 22 are formed thin, and the end of the comb teeth of the pixel electrode 21 is formed.
- the floating electrode 61 is arranged in a region overlapping with each of the end portions of the comb teeth and the common electrode 22.
- FIG. 29 is a schematic plan view of one sub-pixel unit of the TFT substrate included in the liquid crystal display device according to Embodiment 2-8.
- the light shielding films 27 are arranged on each of the end portions of the comb teeth of the pixel electrode 21 and one end portion of the comb teeth of the common electrode 22. .
- FIG. 30 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-9.
- the width of the portion overlapping the end of the comb teeth of the pixel electrode 21 of the floating electrode 61 is the width of the comb teeth of the pixel electrode 21 of the floating electrode 61. It is formed wider than the width of the portion that does not overlap the end. Further, the width of the portion of the floating electrode 61 that overlaps the end of the comb tooth of the common electrode 22 is formed wider than the width of the portion of the floating electrode 61 that does not overlap the end of the comb tooth.
- FIG. 31 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 2-10.
- the comb-tooth portion of the common electrode 22 is arranged in the same layer as the pixel electrode 21, and the handle portion of the common electrode 22 and the comb portion are arranged.
- the tooth portions are connected to each other through contact holes 23. Therefore, a schematic cross-sectional view of the TFT substrate along line IJ in FIG. 31 is as shown in FIG.
- the handle portion of the common electrode 22 is disposed on the glass substrate 31, and the comb-tooth portion of the common electrode 22 is disposed on the second insulating film 33.
- the common electrode 22 may be disposed in the same layer as the pixel electrode 21.
- the pixel electrode 21 and the handle portion of the common electrode 22 may be manufactured in the same process.
- Embodiment 2-11 The liquid crystal display device according to Embodiment 2-11 uses a horizontal alignment film instead of the vertical alignment film as shown in Embodiments 2-1 to 2-10.
- the liquid crystal molecule control method of the liquid crystal display device of Embodiment 2-11 is the IPS mode. Therefore, a schematic plan view of one subpixel unit of the TFT substrate included in the liquid crystal display device of Embodiment 2-11 is the same as FIG.
- the control method of the liquid crystal molecules of the liquid crystal display device of Embodiment 2-11 is the same as that of Embodiment 1-10 described above.
- Embodiments 2-1 to 2-11 have been described.
- the features of Embodiments 2-1 to 2-11 can be combined with each other.
- FIG. 33 to FIG. 35 are schematic plan views showing a form in which a bridging electrode is used instead of a floating electrode.
- FIG. 33 shows Embodiment 2-3
- FIG. 34 shows Embodiment 2-4
- Embodiment 3 Hereinafter, the liquid crystal display device according to the third embodiment will be described by dividing into ten forms of the embodiments 3-1 to 3-10.
- Each liquid crystal display device of Embodiment 3 is characterized in that the pixel electrode has comb teeth on both sides with respect to one handle, whereas the common electrode has comb teeth on one side with respect to one handle. Have.
- Embodiments 3-1 to 3-10 are all in a mode in which the alignment of liquid crystal molecules is controlled using a lateral electric field.
- Embodiments 3-1 to 3-9 when no voltage is applied, In contrast to the control mode in which the liquid crystal molecules exhibit homeotropic alignment, that is, vertical alignment with respect to a pair of substrate surfaces, in Embodiment 3-10, the liquid crystal molecules are homogeneously aligned when no voltage is applied, that is, These are different in that they are so-called IPS modes that show horizontal orientation with respect to a pair of substrate surfaces.
- FIG. 36 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 3-1.
- FIG. 37 is a schematic cross-sectional view of the TFT substrate along the line KL in FIG.
- the pixel electrode 21 and the common electrode 22 are arranged in different layers, the common electrode 22 is arranged closer to the liquid crystal layer, and the pixel electrode 21 is arranged in a layer farther from the liquid crystal layer.
- the liquid crystal display device of Embodiment 3-1 has a correction floating electrode 61, and the floating electrode 61 is arranged so as to overlap with the end portions of the comb teeth of the pixel electrode 21.
- the common electrode 22 is disposed at a position overlapping the gate wiring 25 and the source wiring 24 and in a layer different from each other via an insulating film. From the TFT 26, the drain electrode extends to the center of the subpixel by the lead-out wiring 28, and is connected to the pixel electrode 21 through the contact hole 29 in the drain electrode.
- FIG. 38 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 3-2.
- the floating electrode 61 is disposed so as to overlap with the end portion of the comb tooth of the common electrode 22.
- FIG. 39 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 3-3.
- the floating electrode 61 is disposed in a region overlapping with both ends of the comb teeth of the pixel electrode 21.
- FIG. 40 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 3-4. As shown in FIG. 40, in the liquid crystal display device according to Embodiment 3-4, two floating electrodes 61 are arranged in each region overlapping with both ends of the comb teeth of the pixel electrode 21.
- FIG. 41 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 3-5.
- contact holes 64 are formed at the ends of the comb teeth of the pixel electrode 21, and each of the bridging electrodes 63 is connected via the contact holes 64. It is connected.
- the bridging electrode 63 has a linear shape and is disposed so as to overlap each of the end portions of the comb teeth of the pixel electrode 21.
- a material of the bridging electrode 63 the same material as in the case of Embodiment 1-5 can be used.
- the bridging electrode 63 By providing the bridging electrode 63, even if a disconnection occurs in a part of the comb teeth of the pixel electrode 21, the comb tooth and the disconnection of the pixel electrode 21 in which the disconnection has occurred occur via the bridging electrode 63.
- the pixel electrodes 21 are not connected to the comb teeth, and a signal voltage can be supplied to the entire pixel electrode 21, so that no pixel defect occurs.
- FIG. 42 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 3-6. As shown in FIG. 42, in the liquid crystal display device of Embodiment 3-6, one of the comb teeth of the pixel electrode 21 is formed narrower than the other, and each of the end portions of the comb teeth of the pixel electrode 21 is formed. Floating electrode 61 is arranged in a region overlapping with.
- FIG. 43 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 3-7. As shown in FIG. 43, in the liquid crystal display device of Embodiment 3-7, the light-shielding film 27 is disposed in a region overlapping with each of the end portions of the comb teeth of the pixel electrode 21.
- FIG. 44 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 3-8.
- the width of the portion overlapping the end of the comb teeth of the pixel electrode 21 of the floating electrode 61 is the width of the comb teeth of the pixel electrode 21 of the floating electrode 61. It is formed wider than the width of the portion that does not overlap the end.
- the width of the portion overlapping the end of the comb tooth of the pixel electrode 21 is formed wider in this way, so that correction by laser irradiation is facilitated and the comb of the pixel electrode 21 is facilitated. Since the width of the portion that does not overlap with the end of the tooth can be reduced, the transmittance is improved.
- Embodiment 3-9 In the liquid crystal display device of Embodiment 3-9, the pixel electrode and the common electrode are arranged in the same layer. Therefore, a schematic plan view of one subpixel unit of the TFT substrate included in the liquid crystal display device of Embodiment 3-9 is the same as FIG. On the other hand, FIG. 45 is a schematic cross-sectional view of the TFT substrate along the line KL in FIG. 36 showing the liquid crystal display device of Embodiment 3-9.
- the pixel electrode 21 and the common electrode 22 may be arranged in the same layer.
- the pixel electrode 21 and the common electrode 22 may be manufactured in the same process.
- Embodiment 3-10 The liquid crystal display device according to Embodiment 3-10 uses a horizontal alignment film instead of the vertical alignment film as shown in Embodiments 3-1 to 3-9.
- the liquid crystal molecule control method of the liquid crystal display device of Embodiment 3-10 is the IPS mode. Therefore, a schematic plan view of one subpixel unit of the TFT substrate included in the liquid crystal display device of Embodiment 3-10 is the same as FIG.
- the control method of the liquid crystal molecules of the liquid crystal display device of Embodiment 3-10 is the same as that of Embodiment 1-10 described above.
- Embodiments 3-1 to 3-10 have been described.
- a bridging electrode instead of a floating electrode as in Embodiment 3-5.
- the features of Embodiments 3-1 to 3-10 can be combined with each other.
- Embodiment 4 the liquid crystal display device according to the fourth embodiment will be described by dividing it into twelve forms of the embodiments 4-1 to 4-12.
- the pixel electrode has comb teeth on one side with respect to one handle, whereas the common electrode has comb teeth on both sides with respect to one handle.
- the common electrode is extended so as to cross the center of the sub-pixel.
- the pixel electrode has comb teeth on both sides with respect to one handle, whereas the common electrode has comb teeth on one side with respect to one handle.
- the common electrode is extended so as to cross the gap between the sub-pixels.
- each of the source wiring, the pixel electrode, and the common electrode has a horizontal V-shape (" ⁇ " shape).
- the sub-pixel has the shape of the tip of the arrow.
- the liquid crystal display devices of Embodiments 4-1 to 4-12 are all in a mode in which the alignment control of liquid crystal molecules is performed using a lateral electric field.
- Embodiments 4-1 to 4-10 when no voltage is applied, In contrast to the control mode in which the liquid crystal molecules exhibit homeotropic alignment, that is, vertical alignment with respect to a pair of substrate surfaces, in Embodiment 4-11, the liquid crystal molecules are homogeneously aligned when no voltage is applied, that is, These are different in that they are so-called IPS modes that show horizontal orientation with respect to a pair of substrate surfaces.
- any mode can be applied.
- FIG. 46 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 4-1.
- FIG. 19 is also a schematic cross-sectional view of the TFT substrate along the line MN in FIG.
- the liquid crystal display device of Embodiment 4-1 has a correction floating electrode 61, and the floating electrode 61 includes the comb tooth end of the pixel electrode 21 and the comb of the common electrode 22. It arrange
- the single floating electrode 61 can be used as a correction electrode for both the pixel electrode 21 and the common electrode 22.
- FIG. 47 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 4-2.
- the floating electrode 61 shorter than the length of the floating electrode 61 in the liquid crystal display device of the embodiment 4-1 is disposed. Used for use. By reducing the length of the floating electrode 61, the transmittance is further improved.
- FIG. 48 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 4-3.
- a floating electrode 61 is also disposed in a region overlapping with the other comb tooth end.
- the floating electrode 61 is arranged so as to overlap both the end portions of the comb teeth of the pixel electrode 21 and the end portions of both comb teeth of the common electrode 22. Regardless of which part of the common electrode 22 is disconnected, correction by laser irradiation can be handled.
- FIG. 49 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 4-4. As shown in FIG. 49, in the liquid crystal display device according to Embodiment 4-4, the region overlapping the both ends of the comb teeth of the pixel electrode 21 and the ends of both comb teeth of the common electrode 22 Two floating electrodes 61 are arranged in each case.
- FIG. 50 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 4-5.
- contact holes 64 are formed at the respective ends of the comb teeth of the pixel electrode 21, and the bridging electrode 63 is connected via the contact holes 64.
- the bridging electrode 63 has a linear shape, and is disposed so as to overlap with the end portions of the comb teeth of the pixel electrode 21 and the end portion of one comb tooth of the common electrode 22.
- a material of the bridging electrode 63 the same material as in the case of Embodiment 1-5 can be used.
- the bridging electrode 63 By providing the bridging electrode 63, even if a disconnection occurs in a part of the comb teeth of the pixel electrode 21, the comb tooth and the disconnection of the pixel electrode 21 in which the disconnection has occurred occur via the bridging electrode 63. Since the comb electrodes of the pixel electrode 21 that are not connected are connected and the signal voltage can be spread throughout the pixel electrode 21, no pixel defect occurs.
- FIG. 51 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 4-6.
- contact holes 64 are formed at the ends of the comb teeth of the pixel electrode 21 and the comb teeth of the common electrode 22, respectively.
- the bridging electrodes 63 are linear, and are arranged so as to overlap two at each of the end portions of the comb teeth of the pixel electrode 21 and one end portion of the comb teeth of the common electrode 22.
- One of the two bridging electrodes 63 is connected only to the pixel electrode 21 via the contact hole 64, and the other is connected only to the common electrode 22 via the contact hole 64.
- the pixel electrode 21 and the common electrode 22 can be connected via one of the bridging electrodes 63 regardless of whether the pixel electrode 21 or the common electrode 22 is disconnected. Since the signal voltage can be supplied to the entire electrode 21 and the common voltage can be supplied to the entire common electrode 22 through the other of the bridging electrodes 63, the possibility of pixel defects can be reduced.
- FIG. 52 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 4-7.
- the comb electrode half of the pixel electrode 21 and the one comb tooth of the common electrode 22 are formed thin, and the end of the comb tooth of the pixel electrode 21 is formed.
- the floating electrode 61 is arranged in a region overlapping with each of the end portions of the comb teeth and the common electrode 22.
- the floating electrode 61 is arranged so as to overlap with a thin portion of the pixel electrode 21 that is more likely to be disconnected, so that even if the disconnection occurs in either the pixel electrode 21 or the common electrode 22, the floating electrode 61 is not affected by laser irradiation. Can be modified.
- FIG. 53 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 4-8. As shown in FIG. 53, in the liquid crystal display device of Embodiment 4-8, the light shielding film 27 is disposed on each of the end portions of the comb teeth of the pixel electrode 21 and one end portion of the comb teeth of the common electrode 22. .
- FIG. 54 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 4-9.
- the width of the portion of the floating electrode 61 that overlaps the end of the comb teeth of the pixel electrode 21 is the pixel electrode 21 and the common electrode 22 of the floating electrode 61. It is formed wider than the width of the portion that does not overlap with the ends of the comb teeth.
- FIG. 55 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 4-10. As shown in FIG. 55, in the liquid crystal display device of Embodiment 4-10, the pixel electrode 21 and the comb portion of the common electrode 22 are arranged in the same layer. Therefore, a schematic cross-sectional view of the TFT substrate along the line OP in FIG. 55 is the same as FIG.
- the common electrode 22 may be disposed in the same layer as the pixel electrode 21.
- the pixel electrode 21 and the handle portion of the common electrode 22 may be manufactured in the same process.
- Embodiment 4-11 The liquid crystal display device according to Embodiment 4-11 uses a horizontal alignment film instead of the vertical alignment film as shown in Embodiments 4-1 to 4-10.
- the liquid crystal molecule control method of the liquid crystal display device of Embodiment 4-11 is the IPS mode. Therefore, a schematic plan view of one subpixel unit of the TFT substrate included in the liquid crystal display device of Embodiment 4-11 is the same as FIG.
- the control method of the liquid crystal molecules of the liquid crystal display device of Embodiment 4-11 is the same as that of Embodiment 1-10 described above.
- FIG. 56 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 4-12.
- the pixel electrode has comb teeth on one side with respect to one handle, whereas the common electrode has comb teeth on both sides with respect to one handle.
- the common electrode is characterized in that it extends so as to cross the center of the sub-pixel.
- the liquid crystal display device of Embodiment 4-12 as shown in FIG.
- Embodiments 4-1 to 4-12 have been described.
- a bridge electrode can be used instead of a floating electrode as in Embodiment 4-5.
- the features of Embodiments 4-1 to 4-12 can be combined with each other.
- Embodiment 5 the liquid crystal display device of the fifth embodiment will be described by dividing it into 15 forms of the embodiments 5-1 to 5-15.
- Each liquid crystal display device of Embodiment 5 is characterized in that the pixel electrode has comb teeth on both sides with respect to the cross-shaped pattern, and the common electrode has comb teeth on both sides with respect to the cross-shaped pattern.
- the common electrode is extended so as to cross the center of the sub-pixel. By doing so, liquid crystal molecules can be aligned in a balanced manner in an oblique direction, and viewing angle characteristics are improved. Further, since the pixel electrode and the common electrode have a complicated and symmetric structure, liquid crystal molecules can be controlled with high definition.
- the liquid crystal display devices of Embodiments 5-1 to 5-14 are all in a mode in which the alignment control of liquid crystal molecules is performed using a horizontal electric field, whereas the liquid crystal display device of Embodiment 5-15 has a vertical electric field. This mode is used to control the alignment of liquid crystal molecules.
- the liquid crystal molecules are in a homeotropic orientation when no voltage is applied, that is, in a control mode in which the orientation is perpendicular to a pair of substrate surfaces.
- Embodiment 5-14 is a so-called IPS mode in which the liquid crystal molecules exhibit homogeneous alignment, that is, horizontal alignment with respect to a pair of substrate surfaces when no voltage is applied.
- the liquid crystal display device of Embodiment 5-15 is a so-called VA mode.
- FIG. 57 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-1.
- FIG. 58 is a schematic cross-sectional view of the TFT substrate along the QR line in FIG.
- the liquid crystal display device of Embodiment 5-1 has a correction floating electrode 61, and the floating electrode 61 includes the comb tooth end of the pixel electrode 21 and the comb of the common electrode 22. It arrange
- the floating electrode 61 is linearly extended in the short side direction of the subpixel (the direction along the gate wiring 25), and is used for correcting the common electrode 22.
- FIG. 59 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-2.
- the floating electrode 61 in the liquid crystal display device of the embodiment 5-1 has the comb teeth end of the pixel electrode 21 and the comb teeth of the common electrode 22. It arrange
- the floating electrode 61 extends linearly in the long-side direction of the sub-pixel (the direction along the source wiring 24), and the floating electrode 61 is connected to either the pixel electrode 21 or the common electrode 22 by the single floating electrode 61. However, it can be used as a correction electrode.
- FIG. 60 is a schematic plan view of one sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 5-3.
- the liquid crystal display device according to Embodiment 5-3 is arranged so as to overlap with both the comb teeth end of the pixel electrode 21 and the comb teeth end of the common electrode 22.
- the floating electrode 61 is disposed on both the upper side and the lower side of the sub-pixel in the short side direction (the direction along the gate wiring 25). According to this, the floating electrode 61 arranged along the upper side can be used as an electrode for correcting the common electrode 22, and the floating electrode 61 arranged along the lower side can be used as an electrode for correcting the pixel electrode 21. Since it can be used, the pixel electrode 21 and the common electrode 22 can be used.
- FIG. 61 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 5-4.
- the floating electrode 61 overlaps with both the end portions of the comb teeth of the pixel electrode 21 and the end portion of the comb teeth of the common electrode 22. Is arranged.
- the floating electrode 61 is arranged in the short side direction of the sub-pixel (the direction along the gate wiring 25) and overlaps not only the end portion of the comb tooth but also the end portion of the handle.
- the floating electrode 61 arranged in this manner is arranged so as to overlap with both the comb-tooth end portion of the pixel electrode 21 and the comb-tooth end portion of the common electrode 22, a single floating electrode is provided. 61, the pixel electrode 21 and the common electrode 22 can be used as correction electrodes.
- FIG. 62 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-5.
- the floating electrode 61 overlaps with both the comb-tooth end of the pixel electrode 21 and the comb-tooth end of the common electrode 22. Is arranged.
- the floating electrode 61 is arranged in the long side direction of the sub-pixel (the direction along the source wiring 24) and overlaps not only the end portion of the comb tooth but also the end portion of the handle.
- the floating electrode 61 arranged in this manner is arranged so as to overlap with both the comb-tooth end portion of the pixel electrode 21 and the comb-tooth end portion of the common electrode 22, a single floating electrode is provided. 61, the pixel electrode 21 and the common electrode 22 can be used as correction electrodes.
- FIG. 63 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 5-6.
- the floating electrode 61 overlaps with both the comb-tooth end portion of the pixel electrode 21 and the comb-tooth end portion of the common electrode 22. Is arranged.
- the floating electrode 61 is arranged in any direction of the short side direction of the subpixel (direction along the gate wiring 25) and the long side direction of the subpixel (direction along the source wiring 24). It is superimposed not only on the end of the tooth but also on the end of the handle.
- the floating electrode 61 does not overlap the TFT 26 and is disposed along the outer periphery of the TFT 26. In other words, in the embodiment 5-6, the floating electrode 61 is arranged along the outer periphery of the region surrounded by the source wiring 25, the gate wiring 24, and the TFT 26, whereby the pixel electrode 21 and the common electrode 22 are arranged. Any of the comb teeth can be used as a correction electrode that can cope with any disconnection.
- FIG. 64 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-7. As shown in FIG. 64, in the liquid crystal display device of Embodiment 5-7, the region overlapping the both ends of the comb teeth of the pixel electrode 21 and the ends of both comb teeth of the common electrode 22 Two floating electrodes 61 are arranged in each case.
- FIG. 65 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-8.
- contact holes 64 are formed at the respective ends of the comb teeth of the common electrode 22, and the bridging electrode 63 is connected via the contact holes 64.
- the bridging electrode 63 has a linear shape and is disposed so as to overlap with each of the comb-teeth ends of the common electrode 22.
- the bridging electrode 63 By providing the bridging electrode 63, even if a disconnection occurs in a part of the comb teeth of the common electrode 22, the comb tooth and the disconnection of the common electrode 22 in which the disconnection has occurred occur via the bridging electrode 63. Since the common electrode 22 is connected to the comb teeth of the common electrode 22 and the common voltage can be supplied to the entire common electrode 22, pixel defects do not occur.
- FIG. 66 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 5-9.
- contact holes 64 are formed at the ends of the comb teeth of the pixel electrode 21, and the bridging electrode 63 is formed through the contact holes 64.
- the bridging electrode 63 is linear, and is arranged in the upper side direction of the subpixel (direction along the gate wiring 26).
- the bridging electrode 63 is disposed so as to overlap each of the end portions of the comb teeth of the pixel electrode 21 and is disposed so as to overlap not only the end portions of the comb teeth but also the end portions of the handle. Furthermore, the contact hole 64 is also provided at the end of the handle of the pixel electrode 21.
- the bridging electrode 63 By providing the bridging electrode 63 in this way, even if a disconnection occurs in a part of the comb teeth of the pixel electrode 21, the comb teeth of the pixel electrode 21 in which the disconnection occurs via the bridging electrode 63. Since the comb teeth or the handle of the pixel electrode 21 where disconnection does not occur is connected and a signal voltage can be supplied to the entire pixel electrode 21, no pixel defect occurs.
- FIG. 67 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 5-10.
- contact holes 64 are formed at the ends of the comb teeth of the pixel electrode 21, the comb teeth of the common electrode 22, and the handle of the pixel electrode 21, respectively.
- the bridging electrode 63 has a linear shape, and is disposed so as to overlap two each on the ends of the comb teeth of the pixel electrode 21, the comb teeth of the common electrode 22, and the handle of the pixel electrode 21.
- One of the two bridging electrodes 63 is connected only to the pixel electrode 21 via the contact hole 64, and the other is connected only to the common electrode 22 via the contact hole 64.
- the pixel electrode 21 and the common electrode 22 can be connected via one of the bridging electrodes 63 regardless of whether the pixel electrode 21 or the common electrode 22 is disconnected. Since the signal voltage can be supplied to the entire electrode 21 and the common voltage can be supplied to the entire common electrode 22 through the other of the bridging electrodes 63, the possibility of pixel defects can be reduced.
- FIG. 68 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-11.
- one comb tooth of the pixel electrode 21 and the common electrode 22 is formed narrower than the other one with the center line of the pixel electrode 21 being symmetrical.
- the floating electrode 61 is arranged in a region overlapping with each of the end portions of the comb teeth of the pixel electrode 21 and the end portions of the comb teeth of the common electrode 22.
- FIG. 69 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 5-12. As shown in FIG. 69, in the liquid crystal display device of Embodiment 5-12, a light shielding film is disposed on each of the comb-teeth end of the pixel electrode and one comb-teeth end of the common electrode.
- FIG. 70 is a schematic plan view of a sub-pixel unit of a TFT substrate included in the liquid crystal display device according to Embodiment 5-13.
- the width of the portion of the floating electrode 61 that overlaps the end of the comb teeth of the pixel electrode 21 is the width of the comb teeth of the common electrode 22 of the floating electrode 61. It is formed wider than the width of the portion that does not overlap the end.
- Embodiment 5-14 The liquid crystal display device of Embodiment 5-14 uses a horizontal alignment film instead of the vertical alignment film as shown in Embodiments 5-1 to 5-13.
- the liquid crystal molecule control method of the liquid crystal display device of Embodiment 5-14 is the IPS mode. Therefore, a schematic plan view of one subpixel unit of the TFT substrate included in the liquid crystal display device of Embodiment 5-14 is the same as FIG.
- the control method of the liquid crystal molecules of the liquid crystal display device of Embodiment 5-14 is the same as that of Embodiment 1-10 described above.
- FIG. 71 is a schematic plan view of one subpixel unit of a TFT substrate included in the liquid crystal display device of Embodiment 5-15.
- the TFT substrate of the liquid crystal display device of Embodiment 5-15 has only the pixel electrode 21 and no common electrode.
- the common electrode is disposed on the other substrate (counter substrate) facing the TFT substrate. In the counter substrate, the common electrode does not have a fine pattern shape like a pixel electrode and has a planar shape without a slit.
- FIGS. 72-1 and 72-2 are schematic cross-sectional views of the liquid crystal display device of Embodiment 5-15, and particularly show in detail the behavior of liquid crystal molecules.
- FIG. 72-1 shows a state where no voltage is applied to the liquid crystal layer
- FIG. 72-2 shows a state where a voltage is applied to the liquid crystal layer.
- the liquid crystal layer 13 is sandwiched between the pixel electrode 21 and the common electrode 22, so that the liquid crystal layer 13 is driven by a predetermined voltage applied to the pixel electrode 21 and the common electrode 22.
- An electric field can be formed in the layer 13 to control the alignment of the liquid crystal molecules 51.
- a liquid crystal material having negative dielectric anisotropy is used in the liquid crystal layer 13, and vertical alignment films 36 and 43 are disposed on the surfaces of the TFT substrate 11 and the counter substrate 12 that are in contact with the liquid crystal layer 13. ing.
- the liquid crystal molecules 51 exhibit homeotropic alignment, that is, vertical alignment with respect to the pair of substrates 11 and 12 when no voltage is applied. More specifically, the long axes of the rod-like liquid crystal molecules 51 are oriented in a direction substantially perpendicular to the substrate surface, and all of the liquid crystal molecules 51 are regularly arranged in the same direction.
- the liquid crystal molecules 51 are aligned in a direction substantially horizontal to the surfaces of the pair of substrates 11 and 12, and It changes so that a long axis may incline in the direction substantially parallel to the length direction of the comb teeth.
- the width of the comb teeth of the pixel electrode 21 and the width of the comb teeth of the common electrode 22 are preferably as narrow as possible.
- the width of the comb teeth of the pixel electrode 21 is The common electrode 22 is formed with a width of 2 to 10 ⁇ m.
- the width of the comb teeth of the pixel electrode 21 is preferably as narrow as possible.
- the width of the comb teeth of the pixel electrode 21 is 2 to 8 ⁇ m.
- the embodiments 5-1 to 5-15 have been described.
- a bridge electrode can be used instead of the floating electrode as in the embodiment 5-5.
- the features of the embodiments 5-1 to 5-15 can be combined with each other.
- liquid crystal display panel 11 TFT substrate 12: counter substrate 13: liquid crystal layer 21: pixel electrode 22: common electrodes 23, 29, 62, 64: contact hole 24: source wiring (signal wiring) 25: Gate wiring (scanning wiring) 26: TFT (Thin Film Transistor) 27: light shielding film 28: extraction wiring 31, 41: glass substrate 32: first insulating film 33: second insulating film 34: third insulating film 35: fourth insulating film 36, 43: vertical alignment film 37 44: Polarizing plate 38, 45: Horizontal alignment film 42: Color filter 51: Liquid crystal molecule 61: Floating electrode 62: Laser device 63: Cross-linking electrode
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Abstract
Description
以下、実施形態1の液晶表示装置として、実施形態1-1~1-10の10個の形態に分けて述べる。実施形態1の各液晶表示装置は、画素電極及び共通電極のいずれもが、一本の柄に対して片側に櫛歯をもつ点に特徴を有する。
図1は、実施形態1-1の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。また、図2は、図1のA-B線に沿ったTFT基板の断面模式図である。
図5は、実施形態1-2の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図5に示すように、実施形態1-2の液晶表示装置では、共通電極22の端部と重畳する領域にフローティング電極61が配置されている。
図7は、実施形態1-3の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図7に示すように、実施形態1-3の液晶表示装置では、画素電極の端部及び共通電極の端部の両方と重畳する領域に修正用電極が配置されている。
図8は、実施形態1-4の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図8に示すように、実施形態1-4の液晶表示装置では、画素電極21の端部及び共通電極22の端部の両方と重畳する領域に、フローティング電極61がそれぞれ二つずつ配置されている。これら二つのフローティング電極61は、同一の層に配置されていても、互いに異なる層に配置されていてもよい。
図9は、実施形態1-5の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。また、図10は、図9のC-D線に沿ったTFT基板の断面模式図である。図9及び図10に示すように、実施形態1-5の液晶表示装置では、画素電極21の櫛歯のそれぞれの端部にコンタクトホール64が形成されており、該コンタクトホール64を介して架橋電極63のそれぞれと接続されている。架橋電極63は線状であり、画素電極21の端部のそれぞれと重畳して配置されている。
図12は、実施形態1-6の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図12に示すように、実施形態1-6の液晶表示装置では、画素電極21の櫛歯の端部及び共通電極22の櫛歯の端部の両方において先細りになっており、画素電極21の端部と重畳する領域にフローティング電極61が配置されている。
図13は、実施形態1-7の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。また、図14は、図13のE-F線に沿ったTFT基板の断面模式図である。図13及び図14に示すように、実施形態1-7の液晶表示装置では、画素電極21の櫛歯の端部の下層、すなわち、フローティング電極61の下側のそれぞれに遮光膜27が配置されている。遮光膜27の厚みは、0.1μm以上であることが好ましい。
図15は、実施形態1-8の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図15に示すように、実施形態1-8の液晶表示装置では、フローティング電極61の画素電極21の櫛歯の端部と重畳する部位の幅は、フローティング電極61の画素電極21の櫛歯の端部と重畳しない部位の幅よりも広く形成されている。
実施形態1-9の液晶表示装置は、画素電極と共通電極とがそれぞれ異なる層に配置されている形態である。そのため、実施形態1-9の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図は、図1と同様である。一方、図16は、実施形態1-9の液晶表示装置を表す図1のA-B線に沿ったTFT基板の断面模式図であり、図2とは異なっている。
実施形態1-10の液晶表示装置は、実施形態1-1~1-9で示したような垂直配向膜を用いる形態ではなく、水平配向膜が用いられている。言い換えれば、実施形態1-10の液晶表示装置の液晶分子の制御方式は、IPSモードである。したがって、実施形態1-10の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図は、図1と同様である。
以下、実施形態2の液晶表示装置として、実施形態2-1~2-11の11個の形態に分けて述べる。実施形態2の各液晶表示装置は、画素電極が一本の柄に対して片側に櫛歯をもつのに対し、共通電極が一本の柄に対して両側に櫛歯をもつ点に特徴を有する。
図18は、実施形態2-1の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。また、図19は、図18のG-H線に沿ったTFT基板の断面模式図である。
図22は、実施形態2-2の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図22に示すように、実施形態2-2の液晶表示装置では、実施形態2-1の液晶表示装置におけるフローティング電極61の長さよりも短いフローティング電極61が配置されており、共通電極22の修正用として用いられる。フローティング電極61の長さを短くすることで、より透過率が向上する。
図23は、実施形態2-3の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図23に示すように、実施形態2-3の液晶表示装置では、画素電極21の端部及び共通電極22の櫛歯の一方の端部と重畳する領域に加え、共通電極22の櫛歯のもう一方の端部と重畳する領域にもフローティング電極61が配置されている。
図24は、実施形態2-4の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図24に示すように、実施形態2-4の液晶表示装置では、画素電極21の櫛歯の端部、及び、共通電極22の櫛歯の両方の端部のいずれにも重畳する領域に、フローティング電極61がそれぞれ二つずつ配置されている。
図25は、実施形態2-5の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図25に示すように、実施形態2-5の液晶表示装置では、画素電極21の櫛歯のそれぞれの端部にコンタクトホール64が形成されており、該コンタクトホール64を介して架橋電極63のそれぞれと接続されている。架橋電極63は線状であり、画素電極21の櫛歯の端部及び共通電極22の櫛歯の一方の端部のそれぞれと重畳して配置されている。
図27は、実施形態2-6の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図27に示すように、実施形態2-6の液晶表示装置では、画素電極21の櫛歯及び共通電極22の櫛歯のそれぞれの端部にコンタクトホール64が形成されている。架橋電極63は線状であり、画素電極21の櫛歯の端部及び共通電極22の櫛歯の一方の端部のそれぞれに二つずつ重畳して配置されている。また、これら2つの架橋電極63は、一方が画素電極21にのみコンタクトホール64を介してそれぞれ接続されており、他方が共通電極22にのみコンタクトホール64を介してそれぞれ接続されている。
図28は、実施形態2-7の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図28に示すように、実施形態2-7の液晶表示装置では、画素電極21の櫛歯の半分及び共通電極22の一方の櫛歯が細く形成されており、画素電極21の櫛歯の端部及び共通電極22の櫛歯の端部のそれぞれと重畳する領域にフローティング電極61が配置されている。
図29は、実施形態2-8の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図29に示すように、実施形態2-8の液晶表示装置では、画素電極21の櫛歯の端部及び共通電極22の櫛歯の一方の端部のそれぞれに遮光膜27が配置されている。
図30は、実施形態2-9の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図30に示すように、実施形態2-9の液晶表示装置では、フローティング電極61の画素電極21の櫛歯の端部と重畳する部位の幅は、フローティング電極61の画素電極21の櫛歯の端部と重畳しない部位の幅よりも広く形成されている。また、フローティング電極61の共通電極22の櫛歯の端部と重畳する部位の幅は、フローティング電極61の共通電極22の櫛歯の端部と重畳しない部位の幅よりも広く形成されている。
図31は、実施形態2-10の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図31に示すように、実施形態2-10の液晶表示装置では、共通電極22の櫛歯の部分が、画素電極21と同一の層に配置されており、共通電極22の柄の部分と櫛歯の部分とはコンタクトホール23を介して互いに接続されている。そのため、図31のI-J線に沿ったTFT基板の断面模式図は、図32のようになる。この場合、共通電極22の柄の部分が、ガラス基板31の上に配置され、共通電極22の櫛歯の部分が、第二の絶縁膜33の上に配置される。
実施形態2-11の液晶表示装置は、実施形態2-1~2-10で示したような垂直配向膜を用いる形態ではなく、水平配向膜が用いられている。言い換えれば、実施形態2-11の液晶表示装置の液晶分子の制御方式は、IPSモードである。したがって、実施形態2-11の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図は、図18と同様である。
以下、実施形態3の液晶表示装置として、実施形態3-1~3-10の10個の形態に分けて述べる。実施形態3の各液晶表示装置は、画素電極が一本の柄に対して両側に櫛歯をもつのに対し、共通電極が一本の柄に対して片側に櫛歯をもつ点に特徴を有する。
図36は、実施形態3-1の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。また、図37は、図36のK-L線に沿ったTFT基板の断面模式図である。
図38は、実施形態3-2の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図38に示すように、実施形態3-2の液晶表示装置では、フローティング電極61は、共通電極22の櫛歯の端部と重畳するように配置されている。
図39は、実施形態3-3の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図39に示すように、実施形態3-3の液晶表示装置では、画素電極21の櫛歯の両方の端部と重畳する領域にフローティング電極61が配置されている。
図40は、実施形態3-4の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図40に示すように、実施形態3-4の液晶表示装置では、画素電極21の櫛歯の両方の端部と重畳する領域に、フローティング電極61がそれぞれ二つずつ配置されている。
図41は、実施形態3-5の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図41に示すように、実施形態3-5の液晶表示装置では、画素電極21の櫛歯の端部にコンタクトホール64が形成されており、該コンタクトホール64を介して架橋電極63のそれぞれと接続されている。架橋電極63は線状であり、画素電極21の櫛歯の端部のそれぞれと重畳して配置されている。架橋電極63の材料としては、実施形態1-5の場合と同様の材料を用いることができる。
図42は、実施形態3-6の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図42に示すように、実施形態3-6の液晶表示装置では、画素電極21の櫛歯の一方が、他の一方よりも細く形成されており、画素電極21の櫛歯の端部のそれぞれと重畳する領域にフローティング電極61が配置されている。
図43は、実施形態3-7の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図43に示すように、実施形態3-7の液晶表示装置では、画素電極21の櫛歯の端部のそれぞれと重畳する領域に遮光膜27が配置されている。
図44は、実施形態3-8の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図44に示すように、実施形態3-8の液晶表示装置では、フローティング電極61の画素電極21の櫛歯の端部と重畳する部位の幅は、フローティング電極61の画素電極21の櫛歯の端部と重畳しない部位の幅よりも広く形成されている。
実施形態3-9の液晶表示装置は、画素電極と共通電極とがそれぞれ同一の層に配置されている形態である。そのため、実施形態3-9の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図は、図36と同様である。一方、図45は、実施形態3-9の液晶表示装置を表す図36のK-L線に沿ったTFT基板の断面模式図である。
実施形態3-10の液晶表示装置は、実施形態3-1~3-9で示したような垂直配向膜を用いる形態ではなく、水平配向膜が用いられている。言い換えれば、実施形態3-10の液晶表示装置の液晶分子の制御方式は、IPSモードである。したがって、実施形態3-10の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図は、図36と同様である。実施形態3-10の液晶表示装置の液晶分子の制御方式については、上述の実施形態1-10と同様である。
以下、実施形態4の液晶表示装置として、実施形態4-1~4-12の12個の形態に分けて述べる。実施形態4-1~4-11の各液晶表示装置は、画素電極が一本の柄に対して片側に櫛歯をもつのに対し、共通電極が一本の柄に対して両側に櫛歯をもつ点に特徴を有しており、共通電極は、サブ画素の中央を横切るように延伸されている。一方、実施形態4-12の液晶表示装置は、画素電極が一本の柄に対して両側に櫛歯をもつのに対し、共通電極が一本の柄に対して片側に櫛歯を有しており、共通電極は、サブ画素の間隙を横切るように延伸されている。
図46は、実施形態4-1の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。また、図19は、図46のM-N線に沿ったTFT基板の断面模式図でもある。
図47は、実施形態4-2の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図47に示すように、実施形態4-2の液晶表示装置では、実施形態4-1の液晶表示装置におけるフローティング電極61の長さよりも短いフローティング電極61が配置されており、共通電極22の修正用として用いられる。フローティング電極61の長さを短くすることで、より透過率が向上する。
図48は、実施形態4-3の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図48に示すように、実施形態4-3の液晶表示装置では、画素電極21の櫛歯の端部及び共通電極22の櫛歯の一方の端部と重畳する領域に加え、共通電極22のもう一方の櫛歯の端部と重畳する領域にもフローティング電極61が配置されている。
図49は、実施形態4-4の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図49に示すように、実施形態4-4の液晶表示装置では、画素電極21の櫛歯の端部、及び、共通電極22の両方の櫛歯の端部のいずれにも重畳する領域に、フローティング電極61がそれぞれ二つずつ配置されている。
図50は、実施形態4-5の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図50に示すように、実施形態4-5の液晶表示装置では、画素電極21の櫛歯のそれぞれの端部にコンタクトホール64が形成されており、該コンタクトホール64を介して架橋電極63のそれぞれと接続されている。架橋電極63は線状であり、画素電極21の櫛歯の端部及び共通電極22の一方の櫛歯の端部のそれぞれと重畳して配置されている。架橋電極63の材料としては、実施形態1-5の場合と同様の材料を用いることができる。
図51は、実施形態4-6の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図51に示すように、実施形態4-6の液晶表示装置では、画素電極21の櫛歯及び共通電極22の櫛歯のそれぞれの端部にコンタクトホール64が形成されている。架橋電極63は線状であり、画素電極21の櫛歯の端部及び共通電極22の櫛歯の一方の端部のそれぞれに二つずつ重畳して配置されている。また、これら2つの架橋電極63は、一方が画素電極21にのみコンタクトホール64を介してそれぞれ接続されており、他方が共通電極22にのみコンタクトホール64を介してそれぞれ接続されている。
図52は、実施形態4-7の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図52に示すように、実施形態4-7の液晶表示装置では、画素電極21の櫛歯の半分及び共通電極22の一方の櫛歯において細く形成されており、画素電極21の櫛歯の端部及び共通電極22の櫛歯の端部のそれぞれと重畳する領域にフローティング電極61が配置されている。
図53は、実施形態4-8の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図53に示すように、実施形態4-8の液晶表示装置では、画素電極21の櫛歯の端部及び共通電極22の櫛歯の一方の端部のそれぞれに遮光膜27が配置されている。
図54は、実施形態4-9の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図54に示すように、実施形態4-9の液晶表示装置では、フローティング電極61の画素電極21の櫛歯の端部と重畳する部位の幅は、フローティング電極61の画素電極21及び共通電極22の櫛歯の端部と重畳しない部位の幅よりも広く形成されている。
図55は、実施形態4-10の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図55に示すように、実施形態4-10の液晶表示装置は、画素電極21と共通電極22の櫛歯の部分とが同一の層に配置されている。そのため、図55のO-P線に沿ったTFT基板の断面模式図は、図32と同様になる。
実施形態4-11の液晶表示装置は、実施形態4-1~4-10で示したような垂直配向膜を用いる形態ではなく、水平配向膜が用いられている。言い換えれば、実施形態4-11の液晶表示装置の液晶分子の制御方式は、IPSモードである。したがって、実施形態4-11の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図は、図46と同様である。
図56は、実施形態4-12の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。実施形態4-1~4-11の各液晶表示装置は、画素電極が一本の柄に対して片側に櫛歯をもつのに対し、共通電極が一本の柄に対して両側に櫛歯をもち、共通電極はサブ画素の中央を横切るように延伸されている点に特徴を有するが、これとは逆に実施形態4-12の液晶表示装置では、図56に示すように、画素電極21が一本の柄に対して両側に櫛歯をもつのに対し、共通電極22が一本の柄に対して片側に櫛歯をもち、共通電極22はサブ画素の外、すなわち、ゲート配線25上に延伸されている。なお、この配線形態は、実施形態4-1~4-11のいずれに対しても適用することができる。
以下、実施形態5の液晶表示装置として、実施形態5-1~5-15の15個の形態に分けて述べる。実施形態5の各液晶表示装置は、画素電極が十字型の柄に対して両側に櫛歯をもち、かつ共通電極が十字型の柄に対して両側に櫛歯をもつ点に特徴を有する。共通電極は、サブ画素の中央を横切るように延伸されている。こうすることで、液晶分子を斜め方向にもバランスよく配向させることができ、視野角特性が向上する。また、画素電極及び共通電極が複雑かつ対称的な構造を有しているため、液晶分子の高精細な制御が可能となる。
図57は、実施形態5-1の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。また、図58は、図57のQ-R線に沿ったTFT基板の断面模式図である。
図59は、実施形態5-2の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図59に示すように、実施形態5-2の液晶表示装置では、実施形態5-1の液晶表示装置におけるフローティング電極61は、画素電極21の櫛歯の端部と、共通電極22の櫛歯の端部との両方と複数重畳するように配置されている。また、フローティング電極61は、サブ画素の長辺方向(ソース配線24に沿った方向)に線状に延伸されており、一本のフローティング電極61により、画素電極21及び共通電極22のいずれに対しても修正用の電極として用いることができる。
図60は、実施形態5-3の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図60に示すように、実施形態5-3の液晶表示装置では、画素電極21の櫛歯の端部と、共通電極22の櫛歯の端部との両方と重畳するように配置されている。また、フローティング電極61は、サブ画素の短辺方向(ゲート配線25に沿った方向)の上辺及び下辺のいずれに対しても配置されている。これによれば、上辺に沿って配置されたフローティング電極61は共通電極22の修正用の電極として用いることができ、下辺に沿って配置されたフローティング電極61は画素電極21の修正用の電極として用いることができるため、画素電極21及び共通電極22のいずれにも対応可能な形態となる。
図61は、実施形態5-4の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図61に示すように、実施形態5-4の液晶表示装置においてフローティング電極61は、画素電極21の櫛歯の端部、及び、共通電極22の櫛歯の端部の両方と重畳するように配置されている。また、フローティング電極61は、サブ画素の短辺方向(ゲート配線25に沿った方向)に配置されており、櫛歯の端部のみならず柄の端部に対しても重畳している。このように配置されたフローティング電極61は、画素電極21の櫛歯の端部、及び、共通電極22の櫛歯の端部の両方と複数重畳して配置されているので、一本のフローティング電極61により、画素電極21及び共通電極22のいずれに対しても修正用の電極として用いることができる。
図62は、実施形態5-5の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図62に示すように、実施形態5-5の液晶表示装置においてフローティング電極61は、画素電極21の櫛歯の端部、及び、共通電極22の櫛歯の端部の両方と重畳するように配置されている。また、フローティング電極61は、サブ画素の長辺方向(ソース配線24に沿った方向)に配置されており、櫛歯の端部のみならず柄の端部に対しても重畳している。このように配置されたフローティング電極61は、画素電極21の櫛歯の端部、及び、共通電極22の櫛歯の端部の両方と複数重畳して配置されているので、一本のフローティング電極61により、画素電極21及び共通電極22のいずれに対しても修正用の電極として用いることができる。
図63は、実施形態5-6の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図63に示すように、実施形態5-6の液晶表示装置においてフローティング電極61は、画素電極21の櫛歯の端部、及び、共通電極22の櫛歯の端部の両方と重畳するように配置されている。また、フローティング電極61は、サブ画素の短辺方向(ゲート配線25に沿った方向)及びサブ画素の長辺方向(ソース配線24に沿った方向)のいずれの方向にも配置されており、櫛歯の端部のみならず柄の端部に対しても重畳している。なお、フローティング電極61は、TFT26とは重畳しておらず、TFT26の外周に沿って配置されている。言い換えれば、実施形態5-6においては、ソース配線25、ゲート配線24、及び、TFT26で囲まれる領域の外周に沿ってフローティング電極61が配置されており、これにより、画素電極21及び共通電極22のいずれの櫛歯に断線が起こったとしても対応可能な修正用の電極として用いることができる。
図64は、実施形態5-7の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図64に示すように、実施形態5-7の液晶表示装置では、画素電極21の櫛歯の端部、及び、共通電極22の両方の櫛歯の端部のいずれにも重畳する領域に、フローティング電極61がそれぞれ二つずつ配置されている。
図65は、実施形態5-8の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図65に示すように、実施形態5-8の液晶表示装置では、共通電極22の櫛歯のそれぞれの端部にコンタクトホール64が形成されており、該コンタクトホール64を介して架橋電極63のそれぞれと接続されている。架橋電極63は線状であり、共通電極22の櫛歯の端部のそれぞれと重畳して配置されている。
図66は、実施形態5-9の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図66に示すように、実施形態5-9の液晶表示装置では、画素電極21の櫛歯のそれぞれの端部にコンタクトホール64が形成されており、該コンタクトホール64を介して架橋電極63のそれぞれと接続されている。架橋電極63は線状であり、サブ画素の上辺方向(ゲート配線26に沿った方向)に配置されている。また、架橋電極63は、画素電極21の櫛歯の端部のそれぞれと重畳して配置されており、かつ櫛歯の端部のみならず、柄の端部とも重畳して配置されている。更に、コンタクトホール64は、画素電極21の柄の端部にも設けられている。
図67は、実施形態5-10の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図67に示すように、実施形態5-10の液晶表示装置では、画素電極21の櫛歯及び共通電極22の櫛歯並びに画素電極21の柄のそれぞれの端部にコンタクトホール64が形成されている。架橋電極63は線状であり、画素電極21の櫛歯の端部及び共通電極22の櫛歯並びに画素電極21の柄のそれぞれに二つずつ重畳して配置されている。また、これら2つの架橋電極63は、一方が画素電極21にのみコンタクトホール64を介してそれぞれ接続されており、他方が共通電極22にのみコンタクトホール64を介してそれぞれ接続されている。
図68は、実施形態5-11の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図68に示すように、実施形態5-11の液晶表示装置では、画素電極21の中心線を対称として画素電極21及び共通電極22の一方の櫛歯が、他の一方よりも細く形成されており、画素電極21の櫛歯の端部及び共通電極22の櫛歯の端部のそれぞれと重畳する領域にフローティング電極61が配置されている。
図69は、実施形態5-12の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図69に示すように、実施形態5-12の液晶表示装置では、画素電極の櫛歯の端部及び共通電極の一方の櫛歯の端部のそれぞれに遮光膜が配置されている。
図70は、実施形態5-13の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図70に示すように、実施形態5-13の液晶表示装置では、フローティング電極61の画素電極21の櫛歯の端部と重畳する部位の幅は、フローティング電極61の共通電極22の櫛歯の端部と重畳しない部位の幅よりも広く形成されている。
実施形態5-14の液晶表示装置は、実施形態5-1~5-13で示したような垂直配向膜を用いる形態ではなく、水平配向膜が用いられている。言い換えれば、実施形態5-14の液晶表示装置の液晶分子の制御方式は、IPSモードである。したがって、実施形態5-14の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図は、図57と同様である。
図71は、実施形態5-15の液晶表示装置が備えるTFT基板の1サブ画素単位の平面模式図である。図71に示すように、実施形態5-15の液晶表示装置のTFT基板は、画素電極21のみ有しており、共通電極は有していない。共通電極は、TFT基板と対向するもう一方の基板(対向基板)に配置されている。対向基板において共通電極は、画素電極のような微細なパターン形状は有していない、スリットのない平面形状を有している。
11:TFT基板
12:対向基板
13:液晶層
21:画素電極
22:共通電極
23,29,62,64:コンタクトホール
24:ソース配線(信号配線)
25:ゲート配線(走査配線)
26:TFT(薄膜トランジスタ)
27:遮光膜
28:引き出し配線
31,41:ガラス基板
32:第一の絶縁膜
33:第二の絶縁膜
34:第三の絶縁膜
35:第四の絶縁膜
36,43:垂直配向膜
37,44:偏光板
38,45:水平配向膜
42:カラーフィルタ
51:液晶分子
61:フローティング電極
62:レーザー装置
63:架橋電極
Claims (26)
- 液晶層及び該液晶層を挟持する一対の基板を備える液晶表示装置であって、
該一対の基板の少なくとも一方は、液晶層に電圧を印加する電極を有し、
該液晶層に電圧を印加する電極は、二以上の線状部を有し、
該一対の基板のうち、該液晶層に電圧を印加する電極を有する基板は、絶縁膜を挟んで該二以上の線状部の少なくとも二つと重畳するフローティング電極を有する
ことを特徴とする液晶表示装置。 - 前記フローティング電極は、線状であることを特徴とする請求項1記載の液晶表示装置。
- 前記フローティング電極は、金属単体で構成されていることを特徴とする請求項1又は2記載の液晶表示装置。
- 前記フローティング電極は、前記二以上の線状部のそれぞれの端部と重畳していることを特徴とする請求項1~3のいずれかに記載の液晶表示装置。
- 前記フローティング電極の幅は、前記二以上の線状部のそれぞれの幅と略同一であることを特徴とする請求項1~4のいずれかに記載の液晶表示装置。
- 前記フローティング電極の幅は、前記二以上の線状部のそれぞれの幅よりも広いことを特徴とする請求項1~4のいずれかに記載の液晶表示装置。
- 前記フローティング電極の前記二以上の線状部と重畳する部位の幅は、前記フローティング電極の前記二以上の線状部と重畳しない部位の幅よりも広いことを特徴とする請求項1~4のいずれかに記載の液晶表示装置。
- 前記液晶表示装置は、複数のフローティング電極を有し、
該複数のフローティング電極は、少なくとも一つが前記二以上の線状部のそれぞれの一方の端部と重畳し、他の少なくとも一つが前記二以上の線状部のそれぞれの他方の端部と重畳していることを特徴とする請求項1~7のいずれかに記載の液晶表示装置。 - 前記液晶表示装置は、複数のフローティング電極を有し、
該複数のフローティング電極は、少なくとも二つが前記二以上の線状部のそれぞれの一方の端部と重畳していることを特徴とする請求項1~8のいずれかに記載の液晶表示装置。 - 前記二以上の線状部の端部は、遮光膜と重畳していることを特徴とする請求項1~9のいずれかに記載の液晶表示装置。
- 前記液晶層に電圧を印加する電極を有する基板は、走査配線と信号配線とを有し、
前記フローティング電極は、走査配線と信号配線とで囲まれる範囲内に配置されている
ことを特徴とする請求項1~10のいずれかに記載の液晶表示装置。 - 前記フローティング電極は、前記液晶層に電圧を印加する電極よりも液晶層から遠い位置に配置されていることを特徴とする請求項1~11のいずれかに記載の液晶表示装置。
- 前記液晶層に電圧を印加する電極は、柄部と該柄部から突出した二以上の櫛歯を有する櫛型電極であり、
前記二以上の線状部は、該二以上の櫛歯である
ことを特徴とする請求項1~12のいずれかに記載の液晶表示装置。 - 前記液晶表示装置は、前記櫛型電極を一対有し、
該一対の櫛型電極は、互いの櫛歯が一定間隔を空けてかみ合わさっている
ことを特徴とする請求項13記載の液晶表示装置。 - 前記フローティング電極は、上記一対の櫛型電極の両方の櫛歯と重畳していることを特徴とする請求項13又は14記載の液晶表示装置。
- 前記フローティング電極は、前記一対の櫛型電極のうち、より櫛歯の数が多い方の櫛型電極の櫛歯と重畳していることを特徴とする請求項13~15のいずれかに記載の液晶表示装置。
- 前記フローティング電極は、前記一対の櫛型電極のうち、より櫛歯が細い方の櫛型電極の櫛歯と重畳していることを特徴とする請求項13~16のいずれかに記載の液晶表示装置。
- 液晶層及び該液晶層を挟持する一対の基板を備える液晶表示装置であって、
該一対の基板の少なくとも一方は、液晶層に電圧を印加する電極を有し、
該液晶層に電圧を印加する電極は、二以上の線状部を有し、
該一対の基板のうち、該液晶層に電圧を印加する電極を有する基板は、該二以上の線状部の少なくとも二つを架橋する架橋電極を有し、
該架橋電極は、絶縁膜を挟んで該液晶層に電圧を印加する電極と異なる層に配置されている
ことを特徴とする液晶表示装置。 - 前記架橋電極は、線状であることを特徴とする請求項18記載の液晶表示装置。
- 前記架橋電極は、前記二以上の線状部のそれぞれの端部と重畳していることを特徴とする請求項18又は19記載の液晶表示装置。
- 前記液晶表示装置は、複数の架橋電極を有し、
該複数の架橋電極は、少なくとも一つが前記二以上の線状部のそれぞれの一方の端部と重畳し、他の少なくとも一つが前記二以上の線状部のそれぞれの他方の端部と重畳していることを特徴とする請求項18~20のいずれかに記載の液晶表示装置。 - 前記液晶表示装置は、複数の架橋電極を有し、
該複数の架橋電極は、少なくとも二つが前記二以上の線状部のそれぞれの一方の端部と重畳していることを特徴とする請求項18~21のいずれかに記載の液晶表示装置。 - 前記液晶層に電圧を印加する電極は、柄部と該柄部から突出した二以上の櫛歯を有する櫛型電極であり、
前記二以上の線状部は、該二以上の櫛歯である
ことを特徴とする請求項18~22のいずれかに記載の液晶表示装置。 - 前記液晶表示装置は、前記櫛型電極を一対有し、
該一対の櫛型電極は、互いの櫛歯が一定間隔を空けてかみ合わさっている
ことを特徴とする請求項23記載の液晶表示装置。 - 前記架橋電極は、前記一対の櫛型電極のうち、より櫛歯の数が多い方の櫛型電極の櫛歯と重畳していることを特徴とする請求項23又は24記載の液晶表示装置。
- 前記架橋電極は、前記一対の櫛型電極のうち、より櫛歯が細い方の櫛型電極の櫛歯と重畳していることを特徴とする請求項23~25のいずれかに記載の液晶表示装置。
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US13/377,686 US8593584B2 (en) | 2009-06-30 | 2010-03-11 | Liquid-crystal display device including floating electrode |
CN2010800281240A CN102804047A (zh) | 2009-06-30 | 2010-03-11 | 液晶显示装置 |
BRPI1016259A BRPI1016259A2 (pt) | 2009-06-30 | 2010-03-11 | dispositivo de exibição de cristal líquido |
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US (1) | US8593584B2 (ja) |
EP (1) | EP2450744A4 (ja) |
JP (1) | JP5469665B2 (ja) |
CN (1) | CN102804047A (ja) |
BR (1) | BRPI1016259A2 (ja) |
RU (1) | RU2511709C2 (ja) |
WO (1) | WO2011001716A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20150243791A1 (en) * | 2012-10-01 | 2015-08-27 | Sharp Kabushiki Kaisha | Circuit board and display device |
US9207486B2 (en) * | 2012-11-29 | 2015-12-08 | Samsung Display Co., Ltd. | Liquid crystal display apparatus comprising a light shielding layer overlapping outermost conductive patterns of an electrode |
WO2016143686A1 (ja) * | 2015-03-12 | 2016-09-15 | シャープ株式会社 | 液晶表示装置 |
Families Citing this family (13)
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KR101833498B1 (ko) * | 2010-10-29 | 2018-03-02 | 삼성디스플레이 주식회사 | 액정 표시 장치 |
TWI483046B (zh) * | 2012-05-09 | 2015-05-01 | Chunghwa Picture Tubes Ltd | 畫素結構及陣列基板 |
CN102830557A (zh) * | 2012-09-05 | 2012-12-19 | 京东方科技集团股份有限公司 | 阵列基板及显示器件 |
JP2014209213A (ja) * | 2013-03-29 | 2014-11-06 | 株式会社ジャパンディスプレイ | 液晶表示装置及び電子機器 |
CN103399440A (zh) * | 2013-08-08 | 2013-11-20 | 京东方科技集团股份有限公司 | 阵列基板、显示装置及驱动方法 |
CN103488002B (zh) | 2013-09-18 | 2015-03-11 | 京东方科技集团股份有限公司 | 像素电极、阵列基板和显示装置 |
US9716134B2 (en) | 2014-01-21 | 2017-07-25 | Apple Inc. | Organic light-emitting diode display with bottom shields |
US9337247B2 (en) | 2014-01-21 | 2016-05-10 | Apple Inc. | Organic light-emitting diode display with bottom shields |
CN105161070A (zh) | 2015-10-30 | 2015-12-16 | 京东方科技集团股份有限公司 | 用于显示面板的驱动电路和显示装置 |
CN105278180B (zh) * | 2015-11-05 | 2019-01-04 | 京东方科技集团股份有限公司 | 像素结构及其制作方法、阵列基板和显示面板 |
CN107247371B (zh) * | 2017-08-04 | 2021-06-22 | Tcl华星光电技术有限公司 | 液晶显示面板的像素电极结构及液晶显示面板 |
CN108761929B (zh) * | 2018-05-18 | 2020-05-19 | 京东方科技集团股份有限公司 | 一种显示基板、显示装置、制作方法及其修复方法 |
CN110764307B (zh) * | 2019-11-28 | 2022-02-15 | 京东方科技集团股份有限公司 | 液晶显示面板及液晶显示装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10301141A (ja) | 1997-04-25 | 1998-11-13 | Matsushita Electric Ind Co Ltd | 液晶表示素子及びその製造方法 |
JP2000035590A (ja) | 1998-07-21 | 2000-02-02 | Matsushita Electric Ind Co Ltd | 液晶表示素子およびその製造方法 |
JP2001091972A (ja) * | 1999-09-21 | 2001-04-06 | Hitachi Ltd | 液晶表示装置 |
JP2003295207A (ja) | 2002-03-29 | 2003-10-15 | Nec Lcd Technologies Ltd | 横電界方式のアクティブマトリクス型液晶表示装置 |
JP2006330215A (ja) | 2005-05-25 | 2006-12-07 | Hitachi Displays Ltd | 液晶表示装置 |
JP2007316535A (ja) * | 2006-05-29 | 2007-12-06 | Nec Lcd Technologies Ltd | 横電界方式のアクティブマトリクス型液晶表示装置 |
JP2009103925A (ja) * | 2007-10-23 | 2009-05-14 | Nec Lcd Technologies Ltd | 横電界方式のアクティブマトリックス型液晶表示装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4584387B2 (ja) * | 1999-11-19 | 2010-11-17 | シャープ株式会社 | 表示装置及びその欠陥修復方法 |
TWI282457B (en) * | 2000-04-06 | 2007-06-11 | Chi Mei Optoelectronics Corp | Liquid crystal display component with defect restore ability and restoring method of defect |
JP2004226549A (ja) * | 2003-01-21 | 2004-08-12 | Hitachi Displays Ltd | 液晶表示装置 |
JP2004318086A (ja) * | 2003-03-31 | 2004-11-11 | Fujitsu Display Technologies Corp | 薄膜トランジスタ基板およびそのリペア方法 |
JP4293867B2 (ja) | 2003-09-05 | 2009-07-08 | 奇美電子股▲ふん▼有限公司 | 画素の大型化に対応したips液晶ディスプレイ |
TWI284762B (en) * | 2005-10-03 | 2007-08-01 | Au Optronics Corp | A liquid crystal display panel |
JPWO2008004354A1 (ja) * | 2006-07-07 | 2009-12-03 | シャープ株式会社 | アレイ基板、アレイ基板の修正方法及び液晶表示装置 |
KR101306239B1 (ko) | 2006-11-03 | 2013-09-17 | 삼성디스플레이 주식회사 | 액정 표시 장치 및 그의 불량 화소 복구 방법 |
-
2010
- 2010-03-11 EP EP10793887A patent/EP2450744A4/en not_active Withdrawn
- 2010-03-11 RU RU2012103010/28A patent/RU2511709C2/ru not_active IP Right Cessation
- 2010-03-11 CN CN2010800281240A patent/CN102804047A/zh active Pending
- 2010-03-11 WO PCT/JP2010/054117 patent/WO2011001716A1/ja active Application Filing
- 2010-03-11 BR BRPI1016259A patent/BRPI1016259A2/pt not_active IP Right Cessation
- 2010-03-11 JP JP2011520809A patent/JP5469665B2/ja active Active
- 2010-03-11 US US13/377,686 patent/US8593584B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10301141A (ja) | 1997-04-25 | 1998-11-13 | Matsushita Electric Ind Co Ltd | 液晶表示素子及びその製造方法 |
JP2000035590A (ja) | 1998-07-21 | 2000-02-02 | Matsushita Electric Ind Co Ltd | 液晶表示素子およびその製造方法 |
JP2001091972A (ja) * | 1999-09-21 | 2001-04-06 | Hitachi Ltd | 液晶表示装置 |
JP2003295207A (ja) | 2002-03-29 | 2003-10-15 | Nec Lcd Technologies Ltd | 横電界方式のアクティブマトリクス型液晶表示装置 |
JP2006330215A (ja) | 2005-05-25 | 2006-12-07 | Hitachi Displays Ltd | 液晶表示装置 |
JP2007316535A (ja) * | 2006-05-29 | 2007-12-06 | Nec Lcd Technologies Ltd | 横電界方式のアクティブマトリクス型液晶表示装置 |
JP2009103925A (ja) * | 2007-10-23 | 2009-05-14 | Nec Lcd Technologies Ltd | 横電界方式のアクティブマトリックス型液晶表示装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2450744A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150243791A1 (en) * | 2012-10-01 | 2015-08-27 | Sharp Kabushiki Kaisha | Circuit board and display device |
US10312374B2 (en) * | 2012-10-01 | 2019-06-04 | Sharp Kabushiki Kaisha | Circuit board and display device |
US9207486B2 (en) * | 2012-11-29 | 2015-12-08 | Samsung Display Co., Ltd. | Liquid crystal display apparatus comprising a light shielding layer overlapping outermost conductive patterns of an electrode |
WO2016143686A1 (ja) * | 2015-03-12 | 2016-09-15 | シャープ株式会社 | 液晶表示装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2011001716A1 (ja) | 2012-12-13 |
RU2012103010A (ru) | 2013-08-10 |
EP2450744A4 (en) | 2013-02-06 |
RU2511709C2 (ru) | 2014-04-10 |
CN102804047A (zh) | 2012-11-28 |
JP5469665B2 (ja) | 2014-04-16 |
BRPI1016259A2 (pt) | 2016-05-03 |
EP2450744A1 (en) | 2012-05-09 |
US8593584B2 (en) | 2013-11-26 |
US20120081626A1 (en) | 2012-04-05 |
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