WO2010058635A1 - アクティブマトリクス基板、液晶表示パネル、液晶表示装置、アクティブマトリクス基板の製造方法、液晶表示パネルの製造方法、及び、液晶表示パネルの駆動方法 - Google Patents
アクティブマトリクス基板、液晶表示パネル、液晶表示装置、アクティブマトリクス基板の製造方法、液晶表示パネルの製造方法、及び、液晶表示パネルの駆動方法 Download PDFInfo
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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
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- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- 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
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- G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
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- 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
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- G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
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- 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
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/13629—Multilayer wirings
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- G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3622—Control of matrices with row and column drivers using a passive matrix
- G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
- G09G3/3637—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals with intermediate tones displayed by domain size control
Definitions
- the present invention relates to an active matrix substrate, a liquid crystal display panel, a liquid crystal display device, a method for manufacturing an active matrix substrate, and a method for manufacturing a liquid crystal display panel for controlling the orientation of liquid crystal molecules to display an image.
- Active matrix substrate manufactured by a manufacturing method including processing, liquid crystal display panel, liquid crystal display device, active matrix substrate manufacturing method, liquid crystal display panel manufacturing method, and liquid crystal display panel driving method It is.
- liquid crystal display devices In recent years, with the spread of information equipment, there is an increasing demand for higher performance of display panels (liquid crystal display devices).
- a liquid crystal display device on / off of transmitted light is controlled by changing the alignment direction of liquid crystal molecules according to an applied voltage.
- the alignment state of the liquid crystal molecules in a state where no voltage is applied to the liquid crystal is important. Therefore, in order to achieve high performance of the liquid crystal display device, it is necessary to control the initial formation angle (pretilt angle) between the liquid crystal layer and the liquid crystal molecules so as to obtain a good alignment state.
- PSA is a technique for storing the direction in which the liquid crystal is tilted by mixing a polymerizable monomer in the liquid crystal and polymerizing the monomer with light or heat while a voltage is applied to the liquid crystal.
- a liquid crystal material containing a monomer is injected into a cell formed by bonding a pair of substrates each having an alignment film formed thereon so that the alignment films face each other.
- the monomer is polymerized by irradiating ultraviolet rays in a state where liquid crystal molecules are aligned in a predetermined direction by applying an electric field to the cell.
- the PSA process when the magnitude of the voltage applied at the time of ultraviolet irradiation is different, the pretilt angle is different, which causes different transmittance characteristics. Therefore, the voltage application method is important. For this reason, for example, in Patent Document 2 listed below, a liquid crystal display using a PSA process of driving a liquid crystal by utilizing an electric capacity by applying an alternating current and avoiding the influence of wiring defects, that is, a Cs-COM voltage applying system. An apparatus manufacturing method has been proposed.
- a common electrode for applying a voltage to the entire surface of the first substrate is formed on the first substrate, and a gate bus line and data are formed on the second substrate.
- the bus lines are arranged in a matrix, and at the intersection of the two bus lines, a thin film transistor and a pixel electrode connected to the thin film transistor are formed, and a Cs bus line that forms an electric capacity with the pixel electrode is formed.
- a liquid crystal layer including a photosensitive material is filled in a gap between the first substrate and the second substrate to form a liquid crystal layer, and the liquid crystal layer is sandwiched between the common electrode and the pixel electrode. The electric capacity is formed.
- an alternating voltage is applied between a common electrode and a pixel electrode, and light is irradiated to the said liquid crystal layer.
- the voltage when a voltage is applied to the liquid crystal, the voltage is not written from the data bus line, but is written by applying a voltage between the two common electrodes. It is possible to prevent a problem caused by a defective portion caused by the disconnection or short circuit of the bus line, that is, a failure in which only the defective portion has different brightness depending on the pretilt angle formed in the defective portion.
- Japanese Patent Publication Japanese Patent Laid-Open No. 2003-149647 (Publication Date: May 21, 2003)”
- Japanese Patent Publication Japanese Patent Laid-Open No. 2003-177408 (Publication Date: June 27, 2003)”
- Patent Document 2 has a problem that alignment disorder occurs at a position where the pixel electrode slit and the auxiliary capacitance line cross each other by the PSA process of the Cs-COM voltage application method.
- a slit is provided in the pixel electrode.
- the alignment of the liquid crystal molecule depends on an equipotential surface formed when a voltage is applied to the pixel electrode. That is, the tilt of the liquid crystal molecules is controlled by the direction of the electric field.
- the direction of the electric field varies depending on the potential of the storage capacitor line.
- FIG. 9 is a diagram showing lines of electric force (arrow lines) and equipotential surfaces (broken lines) in the vicinity of the slit between the pixel electrode on which the slit is formed and the counter substrate.
- FIG. FIG. 7B is a diagram showing electric lines of force and equipotential surfaces in a region not intersecting with the electric field, and (b) is an electric force in a region where the slit and the auxiliary capacitance line intersect when the auxiliary capacitance line has the same potential as the COM potential.
- FIG. 6C is a diagram showing lines and equipotential surfaces
- FIG. 8C shows electric lines of force and equipotential surfaces in a region where the slit and the auxiliary capacitance line intersect when the auxiliary capacitance line is at a higher potential than the COM potential.
- the electric lines of force extend from each end to the center of the gap at each end of two pixel electrodes adjacent to each other with a gap. Inclined to head towards. In this case, the liquid crystal molecules can be aligned in an appropriate direction as will be described later.
- the electric lines of force are applied from the vicinity of the center of the gap to each end of the pixel electrode at each end of the two pixel electrodes. Inclined in the opposite direction to the lines of electric force in FIG. In this case, as described later, the liquid crystal molecules cannot be aligned in an appropriate direction.
- FIG. 10 is a diagram showing a state of orientation disturbance caused by the PSA process of the Cs-COM voltage application method in the vicinity of the position where the pixel electrode slit and the auxiliary capacitance line cross each other.
- the white area is a normal orientation area
- the black striped pattern is a dark line due to orientation disorder.
- This disorder of orientation is caused by a potential difference obtained by subtracting the potential (Vcom) of the common electrode from the potential (Vcs) of the auxiliary capacitance line and the potential of the common electrode from the potential (Vd) of the pixel electrode in the PSA process of the Cs-COM voltage application method.
- the potential difference obtained by subtracting (Vcom) has the same polarity, and the absolute value of the difference between the potential (Vcs) of the storage capacitor line and the potential (Vcom) of the common electrode is equal to the potential (Vd) of the pixel electrode and the common electrode. Occurs when the absolute value of the difference from the potential (Vcom) is greater (that is, when Vcs ⁇ Vcom and Vd ⁇ Vcom have the same polarity and
- the equipotential surface has the shape shown in FIG. 9C due to the influence of the potential of the auxiliary capacitance line below the slit, it is impossible to give an appropriate pretilt angle to the liquid crystal molecules.
- the equipotential surface as shown in FIG. 9C becomes a further problem when the liquid crystal alignment regulating structure is provided on the common electrode of the counter substrate.
- FIG. 11 is a diagram illustrating a state of alignment of liquid crystal molecules in a liquid crystal display device including a storage capacitor line, a pixel electrode having a slit, and a common electrode having a protrusion
- FIG. The orientation of the liquid crystal molecules is shown, and (b) shows the orientation of the liquid crystal molecules formed by the CSA-COM voltage application type PSA process.
- the protrusion provided on the common electrode is an alignment regulating structure for controlling the pretilt of the liquid crystal molecules.
- a slit may be sufficient as an orientation control structure provided in a common electrode, it is not limited to a protrusion, A slit may be sufficient.
- Vcs-Vcom and Vd-Vcom have the same polarity for the common electrode, the pixel electrode, and the auxiliary capacitance line.
- is applied.
- the equipotential lines in the vicinity of the slits provided in the pixel electrode are directed to the common electrode, contrary to the case of normal driving.
- the pretilt angle in the one domain cannot be formed in one direction.
- the pretilt angle is fixed to the state shown in FIG. 11B, and the dark line in FIG. 10 appears even in normal driving, resulting in a decrease in display quality. There's a problem.
- a liquid crystal display device having a structure in which a scanning signal line is arranged below a pixel electrode and a slit provided in the pixel electrode intersects with the scanning signal line (the potential of the scanning signal line minus the common electrode) Scanning so that (potential) and (pixel electrode potential ⁇ common electrode potential) have the same polarity, and
- the present invention has been made in view of the above-described problems, and an object of the present invention is to provide an active matrix substrate, a liquid crystal display panel, and a liquid crystal display capable of suppressing alignment disorder of liquid crystal and realizing high-quality display.
- An object is to provide a device, a method for manufacturing an active matrix substrate, a method for manufacturing a liquid crystal display panel, and a method for driving a liquid crystal display panel.
- an active matrix substrate includes a plurality of scanning signal lines, a plurality of signal wirings arranged to intersect the scanning signal lines, the scanning signal lines, and the scanning signal lines.
- a pixel portion configured by a pixel electrode portion provided corresponding to a combination with the signal wiring, the pixel portion having an alignment control gap for controlling the alignment state of liquid crystal molecules, and the scan signal line.
- a switching element for switching the signal wiring and the pixel electrode portion to a conductive state or a non-conductive state in response to a scanning signal to be connected to the switching element, and when the switching element is in a conductive state,
- An active matrix substrate including a metal wiring for supplying the data signal to the pixel electrode portion and an auxiliary capacitance line for forming an electric capacity between the pixel electrode portion.
- a metal layer is formed so as to cover the storage capacitor line or the scanning signal line.
- the active matrix substrate includes a plurality of scanning signal lines, a plurality of signal wirings arranged so as to intersect the scanning signal lines, and a combination of the scanning signal lines and the signal wirings.
- the pixel unit is configured by a pixel electrode unit provided correspondingly, and includes a pixel unit having an alignment control gap unit that controls the alignment state of liquid crystal molecules.
- the pixel electrode unit may be composed of one pixel electrode or a plurality of subpixel electrodes. Further, the pixel portion corresponds to a set of pixel electrode portions provided at the intersection of the scanning signal line and the signal wiring.
- the pixel unit has, for example, normal slits and fine slits provided in each pixel electrode constituting the pixel electrode unit as the alignment control gap unit that changes the alignment state of the liquid crystal molecules.
- the alignment control gap portion in the pixel portion may be a gap between the pixel electrode portion and the pixel electrode portion constituting the pixel portion.
- the active matrix substrate includes a switching element that switches the signal wiring and the pixel electrode portion to a conductive state or a non-conductive state in accordance with a scanning signal supplied from the scanning signal line.
- a switching element that switches the signal wiring and the pixel electrode portion to a conductive state or a non-conductive state in accordance with a scanning signal supplied from the scanning signal line.
- a capacitor line is arranged.
- the switching element is constituted by, for example, a TFT, and is provided between the pixel electrode portion and the signal wiring for each pixel electrode portion. Then, switching is performed in accordance with a signal from the scanning signal line, and the electrical connection between the pixel electrode portion and the signal wiring, that is, the conductive state and the non-conductive state are switched.
- the switching element is connected to the pixel electrode portion by a metal wiring, and when in a conductive state, a voltage corresponding to a data signal from the signal wiring is supplied to the pixel electrode portion.
- the metal wiring is configured as a drain line from the drain electrode of the TFT, for example. Further, an auxiliary capacitance line is provided to form an electric capacity with the pixel electrode portion.
- the pixel portion layer and the auxiliary capacitance line or the scanning signal line layer A metal layer is formed so as to cover at least the auxiliary capacitance line or the scanning signal line.
- the metal layer may be, for example, the metal wiring from the drain electrode or the signal wiring. Alternatively, it may be an intermediate electrode, or may be a shield metal formed completely independently. Note that the intermediate electrode is an electrode having the same potential as the pixel electrode and connected to the pixel electrode through a contact hole.
- a PSA process may be performed to form a pretilt angle of liquid crystal molecules, but an auxiliary capacitance wiring is provided.
- the PSA process (potential of auxiliary capacitance line ⁇ potential of common electrode) and (potential of pixel electrode ⁇ potential of common electrode) have the same polarity, and
- the liquid crystal display device is not limited to the liquid crystal display device that has performed the PSA process.
- the potential of the pixel electrode ⁇ the potential of the common electrode have the same polarity
- the potential of the auxiliary capacitance line (or the scanning signal line) ⁇ the potential of the common electrode
- the alignment control gap that is, the opening area of the gap between the slits and the pixel electrodes, and the auxiliary capacitance line or the scanning signal line overlap vertically.
- at least the storage capacitor line or the scanning signal line is covered with the metal layer.
- the potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer and the potential of the common electrode are subtracted from the potential of the pixel electrode portion.
- a first potential state in which the potential difference is opposite in polarity, a second potential state in which the potential of the metal layer is equal to the potential of the common electrode, and a potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer The potential difference obtained by subtracting the potential of the common electrode from the potential of the pixel electrode portion has the same polarity, and the absolute value of the difference between the potential of the pixel electrode portion and the potential of the common electrode is the potential of the metal layer.
- the potential of the metal layer can be set so as to form any one of the third potential states that are equal to or larger than the absolute value of the difference between the potential of the common electrode and the common electrode.
- the storage capacitor line (or scanning signal line) layer and the pixel electrode layer are formed in a region where the storage capacitor line (or scanning signal line) and the alignment control gap portion intersect. Since a metal layer set with a potential to form the first potential state, the second potential state, or the third potential state is disposed between the auxiliary capacitance wiring (or The influence of the potential of the scanning signal line) can be shielded.
- the equipotential surface formed in the liquid crystal layer around the alignment control gap that intersects the storage capacitor line (or the scanning signal line) is The liquid crystal display panel can be improved in display quality because it does not affect the alignment of the liquid crystal molecules, and the liquid crystal molecules can be properly aligned and properly aligned. .
- the method for manufacturing an active matrix substrate according to the present invention includes a plurality of scanning signal lines, a plurality of signal wirings arranged so as to intersect the scanning signal lines, and the scanning signal lines and the signal wirings.
- a method of manufacturing an active matrix substrate comprising: a metal wiring to be supplied to the pixel electrode portion; and an auxiliary capacitance line for forming an electric capacity between the pixel electrode portion And a step of forming a metal layer so as to cover at least the auxiliary capacitance line or the scanning signal line in a region where the auxiliary capacitance line or the scanning signal line intersects the alignment control gap. It is characterized by being.
- an active matrix substrate includes a plurality of scanning signal lines, a plurality of signal wirings arranged to intersect the scanning signal lines, the scanning signal lines, and the scanning signal lines.
- a pixel portion configured by a pixel electrode portion provided corresponding to a combination with the signal wiring, the pixel portion having an alignment control gap for controlling the alignment state of liquid crystal molecules, and the scan signal line.
- the active matrix substrate includes a plurality of scanning signal lines, a plurality of signal wirings arranged so as to intersect the scanning signal lines, and a combination of the scanning signal lines and the signal wirings.
- the pixel unit is configured by a pixel electrode unit provided correspondingly, and includes a pixel unit having an alignment control gap unit that controls the alignment state of liquid crystal molecules.
- the pixel electrode unit may be composed of one pixel electrode or a plurality of subpixel electrodes. Further, the pixel portion corresponds to a set of pixel electrode portions provided at the intersection of the scanning signal line and the signal wiring.
- the pixel unit has, for example, normal slits and fine slits provided in each pixel electrode constituting the pixel electrode unit as the alignment control gap unit that changes the alignment state of the liquid crystal molecules.
- the alignment control gap portion in the pixel portion may be a gap between the pixel electrode portion and the pixel electrode portion constituting the pixel portion.
- the active matrix substrate includes a switching element that switches the signal wiring and the pixel electrode portion to a conductive state or a non-conductive state in accordance with a scanning signal supplied from the scanning signal line. And a metal wiring that is connected to the switching element and supplies a data signal from the signal wiring to the pixel electrode portion when the switching element is in a conductive state.
- the switching element is constituted by, for example, a TFT, and is provided between the pixel electrode portion and the signal wiring for each pixel electrode portion. Then, switching is performed in accordance with a signal from the scanning signal line, and the electrical connection between the pixel electrode portion and the signal wiring, that is, the conductive state and the non-conductive state are switched.
- the switching element is connected to the pixel electrode portion by a metal wiring, and when in a conductive state, a voltage corresponding to a data signal from the signal wiring is supplied to the pixel electrode portion.
- the metal wiring is configured as a drain line from the drain electrode of the TFT, for example.
- At least the scanning signal line is disposed between the pixel portion layer and the scanning signal line layer in a region where the scanning signal line and the alignment control gap portion intersect.
- a metal layer is formed so as to cover it.
- the metal layer may be, for example, the metal wiring from the drain electrode or the signal wiring. Alternatively, it may be an intermediate electrode, or may be a shield metal formed completely independently.
- the alignment control gap that is, the opening area of the gap between the slit and the pixel electrode, and the scanning signal line do not overlap vertically.
- At least the scanning signal line is covered with the metal layer.
- this metal layer for example, a first potential state in which a potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer and a potential difference obtained by subtracting the potential of the common electrode from the potential of the pixel electrode unit are opposite in polarity.
- the difference between the potential of the pixel electrode and the potential of the common electrode is the absolute value of the difference between the potential of the metal layer and the potential of the common electrode.
- the potential can be set so as to form a third potential state that is equal to or greater than the value.
- the first state, the second state, or the third state As a result, in the region where the scanning signal line and the alignment control gap intersect, between the scanning signal line layer and the pixel electrode layer, the first state, the second state, or the third state. Since a metal layer having a potential that forms the above state can be disposed, the influence of the potential of the scanning signal line can be shielded.
- the active matrix substrate of the present invention when a liquid crystal display panel is manufactured, the equipotential surface formed in the liquid crystal layer around the alignment control gap that intersects the scanning signal line is aligned with the alignment of the liquid crystal molecules. Since the liquid crystal molecules can be properly aligned without any influence and the liquid crystal molecules can be properly aligned, the display quality of the liquid crystal display panel can be improved.
- the method for manufacturing an active matrix substrate according to the present invention includes a plurality of scanning signal lines, a plurality of signal wirings arranged so as to intersect the scanning signal lines, and the scanning signal lines and the signal wirings.
- the metal layer includes at least one of the metal wiring and the signal wiring.
- the metal layer can be integrally formed in the manufacturing process of forming the metal wiring or the signal wiring.
- the metal layer can be formed without increasing the manufacturing process, the manufacturing cost can be suppressed.
- the alignment control gap portion is a pore formed individually in the pixel electrode portion.
- the alignment control gap is a gap formed between the plurality of pixel electrode parts constituting the pixel part.
- the alignment control gap is a slit formed by making a cut in the pixel electrode.
- the pixel electrode portion is a multi-pixel electrode including a plurality of sub-pixel electrodes, and is preferably driven by a pixel division method.
- the pixel electrode unit is a multi-pixel electrode including a plurality of sub-pixel electrodes, and is driven by a pixel division method.
- the drain as the metal wiring extended from the switching element formed at the corner of the pixel electrode portion to the auxiliary capacitance line arranged across the pixel electrode portion.
- a covering portion that covers at least the auxiliary capacitance line may be formed on the line in the region where the orientation control gap and the auxiliary capacitance line intersect.
- the scanning signal line is arranged so as to cross the pixel electrode part, and the auxiliary capacitance line is arranged so as to cross the pixel electrode part substantially parallel to the scanning signal line.
- the storage capacitor line disposed across the pixel electrode portion from the switching element formed in the pixel electrode portion and the region where the alignment control gap portion intersects, the scanning signal line,
- the drain line as the metal wiring is extended to at least one of the regions intersecting with the alignment control gap, and the covering portion covering at least the auxiliary capacitance line and the scanning signal line in each region is the drain. It may be formed as part of a line.
- the scanning signal line is arranged so as to cross the end of the pixel electrode part, and the auxiliary signal is provided so as to cross the center of the pixel electrode part substantially parallel to the scanning signal line.
- a capacitance line is arranged, and the auxiliary capacitance line arranged across the pixel electrode portion and the alignment control gap portion intersect from the switching element formed at the corner of the pixel electrode portion.
- At least the auxiliary capacitance line and the scanning signal line are connected to the drain line as the metal wiring extended to at least one of the region and the region where the scanning signal line intersects the orientation control gap. You may form the coating
- the scanning signal line is arranged so as to cross the center of the pixel electrode portion, and the auxiliary electrode is provided so as to cross the end portion of the pixel electrode portion substantially parallel to the scanning signal line.
- a capacitance line is arranged, and the auxiliary capacitance line arranged across the pixel electrode portion and the alignment control gap portion intersect from the switching element formed at the edge portion of the pixel electrode portion.
- At least the auxiliary capacitance line and the scanning signal line are connected to the drain line as the metal wiring extended to at least one of the region and the region where the scanning signal line and the alignment control gap intersect. You may form the coating
- the side in the longitudinal direction of the pixel electrode portion may be formed substantially parallel to the scanning signal line.
- the storage capacitor line is formed so that the alignment control gap provided adjacently in one of the pixel electrode portions overlaps with a portion approaching at an acute angle, and the pixel In the region where the alignment control gap and the auxiliary capacitance line intersect with the drain line as the metal wiring extended from the switching element formed at the corner of the electrode portion to the auxiliary capacitance line, at least A covering portion that covers the auxiliary capacitance line may be formed.
- the auxiliary capacitance line is formed so as to cross the alignment control gap portion formed as a gap between the plurality of pixel electrode portions, and is formed at a corner portion of the pixel electrode portion. Further, in the region where the orientation control gap and the auxiliary capacitance line intersect with the drain line as the metal wiring extended from the switching element to the auxiliary capacitance line, a covering portion that covers at least the auxiliary capacitance line May be formed.
- the auxiliary capacitance line is formed so as to cross the alignment control gap portion formed as a gap between the plurality of pixel electrode portions, and is formed at a corner portion of the pixel electrode portion.
- the metal wiring extended from the switching element formed at the corner of the pixel electrode portion to the scanning signal line arranged to cross the end of the pixel electrode portion.
- a covering portion that covers at least the scanning signal line may be formed in the drain line as a region where the alignment control gap portion and the scanning signal line intersect.
- the liquid crystal display panel according to the present invention is characterized by having the active matrix substrate and a counter substrate provided with a common electrode, and having a liquid crystal layer between these substrates.
- the active matrix substrate is configured such that the scanning signal line or the auxiliary capacitance line is located in a region where the scanning signal line or the auxiliary capacitance line intersects with the orientation control gap portion in a normal driving or a PSA process during manufacturing. Since the influence of the potential can be shielded, the alignment of the liquid crystal molecules can be kept good, the liquid crystal molecules can be properly aligned, and a liquid crystal display panel with high display quality can be realized.
- the counter substrate preferably includes an alignment control unit that controls the alignment state of the liquid crystal molecules.
- the counter substrate includes the alignment control unit.
- the orientation control unit may be a rib or a slit, and is not particularly limited.
- the alignment of the liquid crystal molecules in the liquid crystal layer is regulated, that is, the desired alignment is given to the liquid crystal molecules, and the viewing angle of the liquid crystal display panel can be improved.
- the provision of the active matrix substrate can prevent alignment failure in a region where the scanning signal line or the auxiliary capacitance line intersects with the alignment control gap portion in a PSA process during normal driving or manufacturing. Therefore, display quality is not deteriorated.
- a liquid crystal display device includes the above-described liquid crystal display panel and a drive circuit that drives the liquid crystal display panel.
- the active matrix substrate is configured such that the scanning signal line or the auxiliary capacitance line is located in a region where the scanning signal line or the auxiliary capacitance line intersects with the orientation control gap portion in a normal driving or a PSA process during manufacturing. Since the influence of the potential can be shielded, the orientation of the liquid crystal molecules can be kept good, the optimum pretilt angle can be given, and a liquid crystal display device with high display quality can be realized.
- the method for manufacturing a liquid crystal display panel according to the present invention is a method for manufacturing the liquid crystal display panel, wherein the common electrode is derived from a potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer and the potential of the pixel electrode portion.
- Monomer mixed in By coupling preferably contains a polymer alignment supporting step of applying a pre-tilt angle to the liquid crystal molecules of the liquid crystal layer.
- the auxiliary capacitance line or the auxiliary capacitor line is formed by the metal layer so that the alignment control gap part, that is, the opening region of the gap between the slit and the pixel electrode, and the scanning signal line or the auxiliary capacitor line do not overlap vertically.
- the scanning signal line is covered.
- the metal layer has a potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer and a potential difference obtained by subtracting the potential of the common electrode from the potential of the pixel electrode portion.
- the potential difference obtained by subtracting the potential of the common electrode from the potential of the pixel electrode portion has the same polarity, and the absolute value of the difference between the potential of the pixel electrode portion and the potential of the common electrode is equal to the potential of the metal layer. It is possible to set a potential so as to form a third potential state that is equal to or greater than the absolute value of the difference from the potential of the common electrode.
- the first potential state, the first potential state between the scanning signal line or the auxiliary capacitance line layer and the pixel electrode layer Since the metal layer in which the potential that forms the second potential state or the third potential state is set is disposed, the influence of the potential of the scanning signal line or the auxiliary capacitance wiring can be shielded.
- the equipotential surface formed in the liquid crystal layer around the alignment control gap that intersects the scanning signal line or the auxiliary capacitance line affects the alignment of the liquid crystal molecules.
- the liquid crystal molecules can be properly aligned and properly aligned, so that the display quality of the liquid crystal display panel can be improved.
- the driving method of the liquid crystal display panel according to the present invention is the driving method of the liquid crystal display panel, wherein the common electrode is derived from the potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer and the potential of the pixel electrode portion.
- the auxiliary capacitance line or the auxiliary capacitor line is formed by the metal layer so that the alignment control gap part, that is, the opening region of the gap between the slit and the pixel electrode, and the scanning signal line or the auxiliary capacitor line do not overlap vertically.
- the scanning signal line is covered.
- the metal layer has a potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer and a potential difference obtained by subtracting the potential of the common electrode from the potential of the pixel electrode portion.
- the potential difference obtained by subtracting the potential of the common electrode from the potential of the portion is the same polarity, and the absolute value of the difference between the potential of the pixel electrode portion and the potential of the common electrode is the potential of the metal layer and the common electrode It is possible to set the potential so as to form a third potential state that is equal to or greater than the absolute value of the difference from the potential.
- the first potential state, the first potential state between the scanning signal line or the auxiliary capacitance line layer and the pixel electrode layer Since the metal layer in which the potential that forms the second potential state or the third potential state is set is disposed, the influence of the potential of the scanning signal line or the auxiliary capacitance wiring can be shielded.
- the equipotential surface formed in the liquid crystal layer around the alignment control gap crossing the scanning signal line or the auxiliary capacitance line affects the alignment of the liquid crystal molecules.
- the liquid crystal molecules can be properly aligned and properly aligned, so that the display quality of the liquid crystal display panel can be improved.
- an active matrix substrate includes a plurality of scanning signal lines, a plurality of signal wirings arranged to intersect the scanning signal lines, the scanning signal lines, and the scanning signal lines.
- a pixel portion configured by a pixel electrode portion provided corresponding to a combination with the signal wiring, the pixel portion having an alignment control gap for controlling the alignment state of liquid crystal molecules, and the scan signal line.
- a switching element for switching the signal wiring and the pixel electrode portion to a conductive state or a non-conductive state in response to a scanning signal to be connected to the switching element, and when the switching element is in a conductive state,
- An active matrix substrate including a metal wiring for supplying the data signal to the pixel electrode portion and an auxiliary capacitance line for forming an electric capacity between the pixel electrode portion.
- a metal layer is formed so as to cover the storage capacitor line or the scanning signal line.
- an active matrix substrate includes a plurality of scanning signal lines, a plurality of signal wirings arranged to intersect the scanning signal lines, the scanning signal lines, and the scanning signal lines.
- a pixel portion configured by a pixel electrode portion provided corresponding to a combination with the signal wiring, the pixel portion having an alignment control gap for controlling the alignment state of liquid crystal molecules, and the scan signal line.
- the metal layer is formed in regions, between the layers of the layer and the scanning signal lines of the pixel unit, so as to cover at least the scanning signal lines.
- the layer of the scanning signal line or auxiliary capacitance line and the layer of the pixel electrode A first potential state in which a potential difference obtained by subtracting the potential of the common electrode from the potential of the metal layer and a potential difference obtained by subtracting the potential of the common electrode from the potential of the pixel electrode portion are opposite to each other.
- the subtracted potential difference has the same polarity, and the absolute value of the difference between the potential of the pixel electrode portion and the potential of the common electrode is greater than or equal to the absolute value of the difference between the potential of the metal layer and the potential of the common electrode.
- the third potential state It is possible to arrange the metal layer potential is set so as to form a, the influence of the potential of the scanning signal line or the storage capacitor lines can be shielded.
- the equipotential surface formed in the liquid crystal layer around the alignment control gap crossing the scanning signal line or the auxiliary capacitance line does not affect the alignment of the liquid crystal molecules, and maintains the alignment of the liquid crystal molecules well. Since the liquid crystal molecules can be properly aligned, the display quality of the liquid crystal display panel can be improved.
- FIG. 1 is a block diagram showing a schematic configuration of a liquid crystal display device according to the present embodiment, where (a) shows a liquid crystal display device driven using an auxiliary capacitor, and (b) shows a liquid crystal display driven without using an auxiliary capacitor. The device is shown.
- FIG. 4 is a plan view schematically showing configuration examples (a) to (e) of a liquid crystal display panel in which a normal slit is provided in a pixel electrode according to the present embodiment.
- FIG. 4 is a plan view schematically showing configuration examples (a) to (e) of a liquid crystal display panel in which a normal slit is provided in a pixel electrode according to the present embodiment.
- FIG. 4 is a plan view schematically showing a configuration of a liquid crystal display panel provided with pixel-pixel slits according to the present embodiment. It is sectional drawing which shows typically the structure of the liquid crystal display panel shown to FIG. 4a.
- FIG. 11 is a plan view schematically showing another configuration of a liquid crystal display panel provided with pixel-pixel slits according to the present embodiment. It is a top view which shows typically the structure of the liquid crystal display panel by which the fine slit was provided in the pixel electrode based on this Embodiment.
- FIG. 1 It is a top view which shows the structure of the liquid crystal display panel which has the pixel structure of a horizontally long picture element based on this Embodiment, (a) shows the structure by which the scanning signal line
- FIG. 1 is a cross-sectional view schematically showing a main configuration of a liquid crystal display panel 2 according to the present embodiment.
- FIG. 2 is a block diagram showing a schematic configuration of the liquid crystal display device according to the present embodiment.
- FIG. 2A shows the liquid crystal display device 1 driven using an auxiliary capacitor
- FIG. b shows a liquid crystal display device 1 'that is driven without using an auxiliary capacitor.
- the liquid crystal display device 1 includes a liquid crystal display panel 2, a drive circuit that drives the liquid crystal display panel 2, and a control that controls the drive of the drive circuit.
- the circuit 3 is provided with a backlight unit (not shown) or the like as necessary.
- the drive circuit includes a gate drive circuit 4 that drives a scanning signal line (gate bus line) 21 in the liquid crystal display panel 2, a source drive circuit 5 that drives a data signal line (signal wiring, source bus line) 22, and an auxiliary circuit. And a Cs drive circuit 6 that drives a capacitance line (Cs bus line) 14.
- the gate drive circuit 4, the source drive circuit 5, and the Cs drive circuit 6 are electrically connected to the scanning signal line 21, the data signal line 22, and the auxiliary capacitance line 14, respectively.
- the potential can be applied independently of the current.
- These drive circuits are each electrically connected to the control circuit 3 and controlled by control signals and video signals supplied from the control circuit 3.
- the scanning signal line 21 and the data signal line 22 are provided so as to intersect each other as shown in FIG. Each region surrounded by the scanning signal line 21 and the data signal line 22 corresponds to one pixel.
- the liquid crystal display panel 2 includes an active matrix substrate 10 (thin film transistor substrate) and a counter substrate 20 which will be described later.
- the active matrix substrate 10 has a configuration in which a plurality of pixels 7 are arranged in a matrix. Moreover, although mentioned later for details, each pixel 7 is comprised by the pixel electrode and the switching element.
- the pixel portion in the claims corresponds to a set of a plurality of pixels 7 arranged in a matrix, and the pixel electrode portion in the claims corresponds to a pixel electrode constituting each pixel 7. .
- the liquid crystal display device 1 ′ shown in FIG. 2 (b) is only shown in FIG. 2 (a) only in that it does not include the auxiliary capacitance line (Cs bus line) 14 and the Cs drive circuit 6 that drives it. Unlike the liquid crystal display device 1 shown in the figure, the functions of the other parts are the same and will not be described.
- the active matrix substrate 10 constitutes the liquid crystal display panel 2 together with the counter substrate 20 and the liquid crystal layer 30.
- the active matrix substrate 10 includes a transparent insulating substrate 11, pixel electrodes 12, drain lines (metal wiring) 13, and auxiliary capacitance lines 14.
- the pixel electrode 12 is provided with a slit (alignment control gap) 15. By providing the slit 15, the equipotential surface is deformed to control the orientation direction of the liquid crystal molecules.
- the scanning signal line 21 or the auxiliary capacitance line 14 is covered in a region where the scanning signal line 21 or the auxiliary capacitance line 14 and the slit 15 in the pixel electrode 12 intersect.
- the metal layer constituted by the drain line 13 is formed.
- the data signal line 22 covers the scanning signal line 21 or the auxiliary capacitance line 14 in a region where the scanning signal line 21 or the auxiliary capacitance line 14 and the slit 15 in the pixel electrode 12 intersect.
- the structure by which the metal layer comprised by these was formed may be sufficient.
- an intermediate electrode or an independent electrode is provided so as to cover the scanning signal line 21 or the auxiliary capacitance line 14 in a region where the scanning signal line 21 or the auxiliary capacitance line 14 and the slit 15 in the pixel electrode 12 intersect.
- the structure in which the metal layer comprised with the shield metal made was formed may be sufficient.
- FIG. 12 shows a liquid crystal display device 1A in which a shield metal voltage drive circuit 41 is added to the liquid crystal display device 1 shown in FIG.
- the shield metal voltage drive circuit 41 is arranged on the side opposite to the source drive circuit 5 with respect to the liquid crystal display panel 2, but this is not restrictive, and the circuit layout can be determined arbitrarily.
- the method includes a step of forming at least one of the data signal line 22, the drain line 13, the intermediate electrode, and an independent shield metal so as to cover at least the auxiliary capacitance line 14 or the scanning signal line 21.
- PSA process In order to improve the display performance of the liquid crystal display device, it is necessary to control the pretilt angle so that the liquid crystal molecules are in a good alignment state in the manufacturing stage of the liquid crystal display panel.
- a method for controlling the pretilt angle for example, there is PSA (Polymer Sustained Alignment) treatment.
- PSA process a polymerizable monomer is mixed in a liquid crystal, and in a state where a voltage is applied to the liquid crystal, the direction in which the liquid crystal falls is memorized by polymerizing the monomer with light or heat.
- a liquid crystal display panel using a CS-COM voltage application method that is, by applying a voltage to the auxiliary capacitance line (CS) and the common electrode (COM), the pixel electrode and the common electrode are connected via the auxiliary capacitance.
- a liquid crystal display panel that is driven by applying a voltage between them has the configuration shown in FIG.
- the orientation of the liquid crystal near the protrusion provided on the common electrode and the slit provided on the pixel electrode The orientation of the liquid crystal molecules is the same as the orientation of the liquid crystal in the vicinity.
- liquid crystal display panel 2 according to the present invention, a desired pretilt angle with respect to the liquid crystal molecules can be obtained in the PSA process when the liquid crystal display panel 2 is manufactured by the configuration of the active matrix substrate 10 described above. It becomes possible to grant.
- the liquid crystal display panel 2 according to the present invention will be described more specifically.
- the liquid crystal display panel 2 includes a pair of substrates arranged opposite to each other, that is, an active matrix substrate 10 and a counter substrate 20, and has a configuration in which a liquid crystal layer 30 is sandwiched between the pair of substrates. Yes.
- a phase difference plate and a polarizing plate may be provided on the outer sides of the pair of substrates (surfaces opposite to the opposing surfaces of both substrates) as necessary.
- the counter substrate 20 includes a transparent insulating substrate 16 and a common electrode 17.
- the common electrode 17 is provided with ribs 18 on the surface facing the pixel electrode 12.
- ribs 18 By providing ribs 18 on the surface of the liquid crystal layer, a pretilt angle is imparted to the liquid crystal molecules near the ribs, and when a voltage is applied, other liquid crystal molecules are aligned according to the alignment of the liquid crystal molecules to which the pretilt angle is applied. Therefore, if the rib 18 is provided on the liquid crystal layer surface, the orientation direction of the liquid crystal molecules can be controlled more stably by applying a voltage.
- the common electrode 17 is formed on almost the entire surface of the transparent insulating substrate 16 and is used as a common electrode (that is, a common electrode) for each pixel 7.
- An electric field is applied to the liquid crystal layer 30 by a voltage applied to the common electrode 17 and the pixel electrode 12, thereby modulating the light transmittance of the liquid crystal layer 30, thereby forming an image.
- the common electrode 17 is provided with ribs 18.
- the pixel electrode 12 is provided with a slit, and the common electrode 17 is not necessarily provided with a structure for regulating the alignment. .
- the liquid crystal display panel 2 includes the pixel electrode 12 layer and the auxiliary capacitance line 14 or the scanning signal line 21 layer in the region where the auxiliary capacitance line 14 or the scanning signal line 21 and the slit 15 intersect.
- the active matrix substrate 10 on which at least one of the data signal line 22 and the drain line 13 is formed so as to cover at least the auxiliary capacitance line 14 or the scanning signal line 21 is provided.
- At least the metal layer such as the data signal line 22, the drain line 13, the intermediate electrode, or an independent shield metal is used so that the slit 15 and the auxiliary capacitance line 14 or the scanning signal line 21 do not overlap with each other.
- the storage capacitor line 14 or the scanning signal line 21 is covered.
- the potential of the auxiliary capacitance line 14 (scanning signal line 21) ⁇ the potential of the common electrode 17) and (the potential of the pixel electrode 12 ⁇ the potential of the common electrode 17) are:
- a voltage may be applied to the scanning signal line 21, the potential of the metal layer is set to be equal to or lower than the potential of the pixel electrode.
- the potential of the metal layer is a first potential in which the potential difference obtained by subtracting the potential of the common electrode 17 from the potential of the metal layer and the potential difference obtained by subtracting the potential of the common electrode 17 from the potential of the pixel electrode 12 are reversed.
- a second potential state in which the potential of the metal layer and the potential of the common electrode 17 are equal, or a potential difference obtained by subtracting the potential of the common electrode 17 from the potential of the metal layer and the potential of the pixel electrode 12.
- the absolute value of the difference between the potential of the pixel electrode 12 and the potential of the common electrode 17 is the absolute value of the difference between the potential of the metal layer and the potential of the common electrode 17.
- the liquid crystal molecules 101 of the liquid crystal layer 30 are polymerized by applying a voltage to the liquid crystal layer 30 and polymerizing monomers previously mixed in the liquid crystal layer 30 by setting the third potential state as described above. Pretilt angle to 102 Azukasuru can.
- the potential of the auxiliary capacitance line 14 (scanning signal line 21) ⁇ the potential of the common electrode 17) and (the potential of the pixel electrode 12 ⁇ the potential of the common electrode 17) have the same polarity.
- the potential of the auxiliary capacitance line 14 (the potential of the scanning signal line 21) ⁇ the potential of the common electrode 17
- a voltage may be applied to the line 21, the potential of the metal layer is set to be equal to or lower than the potential of the pixel electrode.
- the potential of the metal layer is a first potential in which the potential difference obtained by subtracting the potential of the common electrode 17 from the potential of the metal layer and the potential difference obtained by subtracting the potential of the common electrode 17 from the potential of the pixel electrode 12 are reversed.
- a second potential state in which the potential of the metal layer and the potential of the common electrode 17 are equal, or a potential difference obtained by subtracting the potential of the common electrode 17 from the potential of the metal layer and the potential of the pixel electrode 12.
- the absolute value of the difference between the potential of the pixel electrode 12 and the potential of the common electrode 17 is the absolute value of the difference between the potential of the metal layer and the potential of the common electrode 17.
- a voltage can be applied to the liquid crystal layer 30 by setting so as to form the third potential state as described above.
- the potential of the metal layer is V
- the potential of the common electrode is Vcom
- the potential of the pixel electrode is Vd
- the potential V of the metal layer is in any of the following states (1) to (3).
- V-Vcom and Vd-Vcom are opposite in polarity
- V Vcom
- V-Vcom and Vd-Vcom have the same polarity
- the first potential state corresponds to (1)
- the second potential state corresponds to (2)
- the third potential state corresponds to (3).
- the first potential state is provided between the scanning signal line 21 or the auxiliary capacitance line 14 and the pixel electrode 12 layer. Further, since the metal layer set with the potential that forms the second potential state or the third potential state is disposed, the influence of the potential of the scanning signal line 21 or the auxiliary capacitance line 14 is shielded. be able to.
- the potential of the auxiliary capacitance line 14 (scanning signal line 21) ⁇ the potential of the common electrode 17) and (the potential of the pixel electrode 12 ⁇ the potential of the common electrode 17) are:
- the equipotential surface formed in the liquid crystal layer 30 around the slit 15 intersecting with the scanning signal line 21 or the auxiliary capacitance line 14 affects the alignment of the liquid crystal molecules 101.
- the liquid crystal molecules 101 can be properly aligned and properly aligned, so that the display quality of the liquid crystal display panel 2 can be improved.
- the shield metal voltage V can be freely set by the shield metal voltage drive circuit 41 described above. Therefore, the potential V is set as the potential V in the above (1) to (3). Any of the potential states can be freely selected.
- V ⁇ Vcom Vd ⁇ Vcom is set.
- the active matrix substrate 10 is, for example, a metal wiring layer including the scanning signal lines 21 and the auxiliary capacitance lines 14, a gate insulating layer, a data signal line 22, and drain lines (metal wiring) on a transparent insulating substrate such as glass.
- the metal wiring layer, the insulating layer, the resin layer, and the pixel electrode 12 including 13 may have a structure formed in this order.
- the counter substrate 20 is, for example, a CF substrate in which a color filter layer, a black matrix, and a common electrode are arranged in this order from the transparent substrate side on a transparent insulating substrate on the surface facing the active matrix substrate 10. May be.
- the counter substrate 20 may be provided with a functional film (not shown) such as an undercoat layer (underlayer) or an overcoat layer (planarization layer) as necessary.
- the common electrode 17 and the pixel electrode 12 may be transparent electrodes formed of a transparent conductive film such as ITO (indium tin oxide), for example.
- ITO indium tin oxide
- a normal slit which is a fine pore partially provided in the pixel electrode a fine slit which is a slit provided by cutting the pixel electrode into, for example, a comb shape, or
- a fine slit which is a slit provided by cutting the pixel electrode into, for example, a comb shape
- a pixel-pixel slit a specific configuration example will be described below for each type of slit of the pixel electrode.
- FIG. 3 is a plan view schematically showing a configuration example of the liquid crystal display panel 2a in which a normal slit is provided in the pixel electrode according to the present embodiment.
- pixel electrodes 12a As shown in FIGS. 3A to 3E, at the intersections of the scanning signal lines 21 and the data signal lines 22, pixel electrodes 12a as pixel electrode parts and TFTs (Thin film Transistors) as switching elements, respectively.
- the TFT 25 is formed at the corner (corner portion) or near the side (edge portion) of the pixel electrode 12a.
- the pixel electrode 12a and the TFT 25 together with the common electrode 17 (not shown) constitute the pixel 7 in FIG.
- the pixel electrode 12a is provided with pores as slits 15a, and the common electrode 17 (not shown) is provided with ribs 18.
- the slit 15a and the rib 18 are provided substantially in parallel.
- the slits 15a and the ribs 18 are alternately arranged. In the configuration shown in FIGS.
- the portion where the plurality of slits 15a and the ribs 18 approach at an acute angle the alignment of the liquid crystal molecules is different from the originally desired alignment, and hence dark lines are generated. Therefore, since the portion becomes a non-display area, as shown in FIGS. 3A to 3C, the portion is convenient for passing the auxiliary capacitance line 14. This also applies to the configurations shown in FIGS. 6 to 8 described later.
- the scanning signal line 21 may be passed through the portion where the plurality of slits 15a and ribs 18 approach at an acute angle.
- the structure which is not provided with the auxiliary capacitance line 14 may be sufficient, and this invention is not specifically limited to either of these structures.
- the TFT 25 includes a gate electrode, a gate insulating film, and a semiconductor layer (not shown), a source electrode 26, and a drain electrode 27.
- the scanning signal line 21 is electrically connected to the gate electrode of the TFT 25, and a part thereof functions as a gate electrode.
- the data signal line 22 is electrically connected to the source electrode 26.
- the TFT 25 performs a switching operation in accordance with the scanning signal supplied from the scanning signal line 21, and switches between a conductive state and a non-conductive state between the pixel electrode 12a and the data signal line 22.
- a voltage corresponding to a data signal representing an image supplied from the data signal line 22 is supplied to the pixel electrode 12 a via the drain line 13.
- the auxiliary capacitance line 14 is formed in the same layer as the scanning signal line 21. Further, the drain line 13 extends from the drain electrode 27 directly above the auxiliary capacitance line 14 or the scanning signal line 21 via a gate insulating film (not shown) for each pixel electrode 12 a in the upper layer of the auxiliary capacitance line 14. Has been.
- the drain line 13 disposed immediately above the auxiliary capacitance line 14 or the scanning signal line 21 is an auxiliary capacitance electrode that increases the overlapping area of the auxiliary capacitance line 14 and the drain line 13 in the overlapping portion with the auxiliary capacitance line 14. Part 130 (see FIG. 3A). Further, the drain line 13 is electrically connected to the pixel electrode 12a through a contact hole 24 provided for the storage capacitor electrode portion 130. Accordingly, in the configuration including the auxiliary capacitance line 14, the auxiliary capacitance line 14 and the pixel electrode 12a form an auxiliary capacitance for each pixel. Accordingly, the pixel potential can be stabilized.
- the scanning signal line 21 extends along the upper end and the lower end of the pixel electrode 12 a, and the auxiliary capacitance line 14 is substantially parallel to the scanning signal line 21. Extending across the center of the pixel electrode 12a.
- the layer of the pixel electrode 12a and the auxiliary capacitance A covering metal portion 19 (metal layer) made of the drain wire 13 is provided as a part of the auxiliary capacitance electrode portion 130 so as to cover at least the auxiliary capacitance line 14 in a layer between the layer of the line 14.
- the scanning signal line 21 extends along the upper end and the lower end of the pixel electrode 12 a, and the auxiliary capacitance line 14 is substantially parallel to the scanning signal line 21. Extending across the center of the pixel electrode 12a. In the region where the opening region of the slit 15a provided in the pixel electrode 12a and the scanning signal line 21 crossing the upper and lower ends of the pixel electrode 12a intersect (region surrounded by a broken line), the layer of the pixel electrode 12a A covering metal portion 19 (metal layer) made of the drain line 13 is provided in a layer between the scanning signal line 21 and the scanning signal line 21 so as to cover at least the scanning signal line 21.
- the scanning signal line 21 extends along the upper end and the lower end of the pixel electrode 12a, and the auxiliary capacitance line 14 is substantially parallel to the scanning signal line 21. Extending across the center of the pixel electrode 12a. Then, a region where the opening region of the slit 15a provided in the pixel electrode 12a and the auxiliary capacitance line 14 crossing the center of the pixel electrode 12a intersect (region surrounded by a broken line), and the pixel electrode 12a are provided.
- a covering metal portion 19 (metal layer) made of the drain line 13 is provided in a layer between the layer of the line 14 so as to cover at least each of the scanning signal line 21 and the auxiliary capacitance line 14.
- the scanning signal line 21 extends across the center of the pixel electrode 12a, and the auxiliary capacitance line 14 has the upper and lower ends of the pixel electrode 12a. It is extended along.
- the layer of the pixel electrode 12a and the auxiliary A covering metal portion 19 (metal layer) made of the drain line 13 is provided in a layer between the capacitor line 14 so as to cover at least the auxiliary capacitor line 14.
- a layer between the pixel electrode 12a and the scanning signal line 21 may be provided with a covered metal portion 19 (metal layer) including the drain line 13 so as to cover at least the scanning signal line 21.
- the auxiliary capacitance line 14 is not provided, and the scanning signal line 21 extends along the upper end and the lower end of the pixel electrode 12a.
- the liquid crystal display panel 2a shown in FIG. 3E is a liquid crystal display panel constituting the liquid crystal display device 1 shown in FIG.
- the layer of the pixel electrode 12a is scanned.
- a covering metal portion 19 (metal layer) made of the drain line 13 is provided in a layer between the signal line 21 so as to cover at least the scanning signal line 21.
- the covering metal portion 19 is constituted by the drain line 13, but may be constituted by the data signal line 22, or an intermediate electrode (not shown) You may be comprised with the independent shield metal.
- the covering metal portion 19 extends to a region where the opening region of the slit 15 and the scanning signal line 21 or the auxiliary capacitance line 14 do not intersect is shown.
- the greater the extent of this overhang the greater the effect of suppressing alignment disturbance, but the aperture ratio is disadvantageous. Therefore, the extent of the overhanging of the covering metal part 19 is determined by the balance between the alignment disorder and the aperture ratio according to the required specifications.
- FIG. 4a and 4b are diagrams showing the configuration of a liquid crystal display panel 2b provided with pixel-pixel slits according to the present embodiment
- FIG. 4a is a plan view schematically showing the configuration of the liquid crystal display panel 2b
- 4b is a cross-sectional view schematically showing a configuration of the liquid crystal display panel 2b, and is a cross-sectional view of a region indicated by AB in FIG. 4a.
- a pixel electrode 12b as a pixel electrode portion and a TFT 25 as a switching element are provided at intersections between the scanning signal line 21 and the data signal line 22, respectively.
- the pixel electrode 12b and the TFT 25 together with the common electrode 17 (not shown) constitute the pixel 7 in FIG.
- the configuration and operation of the TFT 25 are the same as those shown in FIG.
- the configuration shown in FIG. 4a is different from the configuration shown in FIG. 3 in that the gap between the adjacent pixel electrode 12b and the pixel electrode 12b 'functions as the slit 15b.
- the common electrode 17 (not shown) is provided with a rib 18, and the rib 18 is provided substantially in parallel with the pixel-pixel slit 15 b.
- the auxiliary capacitance line 14 extends substantially parallel to the scanning signal line 21 across each pixel electrode 12b.
- the scanning signal line 21 is provided in the same layer as the layer in which the auxiliary capacitance line 14 shown in FIG. 4B is provided.
- the auxiliary capacitance line 14 extends in the longitudinal direction of the pixel electrode 12b (that is, the direction substantially perpendicular to the scanning signal line 21) immediately below the pixel electrode 12b.
- the common electrode 17 is provided with ribs 18 in parallel with the storage capacitor lines 14 provided in the longitudinal direction of the pixel electrode 12b.
- the upper layer of the auxiliary capacitance line 14 formed on the glass substrate 33 is provided for each pixel electrode 12 from the drain electrode 27 to the pixel electrode 12 b via the gate insulating film 32.
- a drain line 13 extends along the auxiliary capacitance line 14 provided in the longitudinal direction of the line.
- An auxiliary capacitance electrode part 131 that increases the area is provided.
- the drain line 13 is electrically connected to the pixel electrode 12b through the contact hole 24 provided in the interlayer insulating film 31 with respect to the auxiliary capacitance electrode portion 131.
- the auxiliary capacitance line 14 and the pixel electrode 12b form an auxiliary capacitance for each pixel, and the pixel potential can be stabilized.
- the transmission efficiency is low in the region where the rib 18 is provided on the common electrode 17 (not shown). Therefore, by using this low transmittance region, the auxiliary capacitance line 14 is provided not only in parallel to the scanning signal line 21 but also in the longitudinal direction of the pixel electrode 12b, thereby increasing the auxiliary capacitance. .
- an area where the opening area of the slit 15b that is, the gap between the pixel electrode 12b and the pixel electrode 12b ′) intersects with the auxiliary capacitance line 14 (enclosed by a broken line).
- the covering metal portion 19 made of the drain line 13 so as to cover at least the auxiliary capacitance line 14 is provided between the pixel electrode 12b and the auxiliary capacitance line 14 in the layer of the auxiliary capacitance electrode portion 131. It is provided as a part.
- FIGS. 4 a and 4 b shows a configuration in which the coated metal portion 19 extends to a region where the opening region of the slit 15 b and the auxiliary capacitance line 14 do not intersect.
- the extent of the overhanging of the covering metal part 19 is determined by the balance between the alignment disorder and the aperture ratio according to the required specifications.
- FIG. 5 is a plan view schematically showing another configuration of the liquid crystal display panel 2b 'provided with pixel-pixel slits according to the present embodiment.
- the liquid crystal panel 2b ′ as shown in FIG. 5, an area where the opening area of the slit 15b (that is, the gap between the pixel electrode 12b and the adjacent pixel electrode 12b ′) intersects with the auxiliary capacitance line 14 (enclosed by a broken line).
- a covered metal portion 19 including a data signal line 22 is provided so as to cover at least the auxiliary capacitance line 14.
- the covered metal portion 19 is formed by locally increasing the width of the data signal line 22.
- the configuration shown in FIGS. 4a and 4b is a configuration in which the drain line 13 is formed so as to cover the auxiliary capacitance line 14 in the region intersecting with the opening region of the slit 15b, but as shown in FIG.
- the data signal line 22 may be formed so as to cover the storage capacitor line 14 in a region intersecting with the opening region of the slit 15b.
- the configuration shown in FIG. 5 is the same as that shown in FIGS. 4a and 4b except that the data signal line 22 is provided so as to cover the auxiliary capacitance line 14 in a region intersecting the opening region of the slit 15b. Therefore, explanation is omitted.
- FIG. 6 is a plan view schematically showing a configuration of a liquid crystal display panel 2c in which the fine slits are provided in the pixel electrode according to the present embodiment.
- a pixel electrode 12c as a pixel electrode portion and a TFT 25 as a switching element are provided at intersections between the scanning signal line 21 and the data signal line 22, respectively.
- the black line represents the fine slit 15c in the pixel electrode 12c. That is, the portion other than the black line represents the pixel electrode 12c.
- the pixel electrode 12c and the TFT 25 together with the common electrode 17 (not shown) constitute the pixel 7 in FIG. 1, which is the same configuration as FIG.
- the configuration and operation of the TFT 25 are the same as those shown in FIG.
- the configuration illustrated in FIG. 6 is different from the configuration illustrated in FIG. 3 in that the pixel electrode is a comb electrode and the slit provided in the pixel electrode is a fine slit 15c.
- the common electrode 17 (not shown) is not provided with the rib 18, but the configuration may be such that the rib 18 is provided in order to improve the alignment regulating force. Is not particularly limited.
- each fine slit 15c has an inclination of approximately 45 degrees with respect to the drain line 13, and is distributed in four different directions by approximately 90 degrees.
- the liquid crystal molecules are tilted along the longitudinal direction of each fine slit 15c, so that four domains having different orientation directions are formed in one pixel.
- a fine slit may be formed vertically and horizontally to form a two-domain configuration.
- the auxiliary capacitance line 14 extends substantially parallel to the scanning signal line 21 across each pixel electrode 12c.
- the drain line 13 extends from the drain electrode 27 along the longitudinal direction of the pixel electrode 12c via a gate insulating film (not shown) for each pixel electrode 12c in the upper layer of the auxiliary capacitance line 14.
- the drain line 13 includes a storage capacitor electrode portion 132 that increases the overlapping area of the storage capacitor line 14 and the drain line 13 at a position intersecting the storage capacitor line 14.
- the drain line 13 is electrically connected to the pixel electrode 12c through a contact hole 24 provided for the auxiliary capacitance electrode portion 132.
- the pixel electrode 12c in the region where the opening region of the slit 15c provided in the pixel electrode 12c and the auxiliary capacitance line 14 intersect (region surrounded by a broken line), the pixel electrode 12c A covering metal portion 19 is provided as a part of the auxiliary capacitance electrode portion 132 so as to cover the auxiliary capacitance line 14 in a layer between this layer and the auxiliary capacitance line 14.
- the example illustrated in FIG. 6 illustrates a configuration in which the coated metal portion 19 extends to a region where the opening region of the slit 15 c and the auxiliary capacitance line 14 do not intersect.
- the extent of the overhanging of the covering metal part 19 is determined by the balance between the alignment disorder and the aperture ratio according to the required specifications.
- FIG. 7 is a diagram showing a configuration of a liquid crystal display panel having a pixel structure of horizontally long picture elements.
- FIG. 7A shows a region of the pixel electrode 12 and a scanning signal line 21 crosses the longitudinal direction of the pixel electrode 12.
- (B) shows that the auxiliary capacitance line 14 is formed so as to cross the longitudinal direction of the pixel electrode 12 in the region of the pixel electrode 12, and the pixel electrode 12 It is a figure which shows the structure which overlaps with the scanning signal line 21 in the vicinity of one long side of two long sides.
- FIG. 7 those having the same functions as those shown in FIGS. 3 to 5 are given the same reference numerals, and description thereof is omitted.
- the pixel electrode overlaps not only the storage capacitor line but also the scanning signal line.
- the scanning signal line 21 is formed near the center of the pixel electrode 12 having a long side parallel to the scanning signal line 21, and overlaps in the vicinity of the two long sides of the pixel electrode 12.
- the auxiliary capacitance line 14 is provided in parallel to the scanning signal line 21. Further, one of the two auxiliary capacitance lines 14 overlapping the pixel electrode 12 extends in parallel to the short side of the pixel electrode 12 and extends from the vicinity of the center of the long side of the pixel electrode 12 toward the scanning signal line 21.
- An exit 141 is provided.
- the plurality of slits 15 are formed so as to be symmetrical with respect to a center line that bisects the long side of the pixel electrode 12 and to form an acute angle with respect to the center line.
- the liquid crystal display panel 2 ′ As shown in FIG. 7A, a plurality of regions (surrounded by broken lines) where the opening region of the slit 15 provided in the pixel electrode 12 and the scanning signal line 21 intersect. In each region), a part of the drain line 13 extends along the short side of the pixel electrode 12 so as to cover the scanning signal line 21 between the layer of the pixel electrode 12 and the layer of the scanning signal line 21.
- the covering metal part 19 is provided.
- drain line 13 extends until it reaches the auxiliary capacitance line 14 while overlapping with the extension portion 141 of the auxiliary capacitance line 14, and further, along the long side of the pixel electrode 12, the auxiliary capacitance line 14 and the slit are extended.
- a drain line 13 is extended to each of a plurality of regions intersecting with 15. In a plurality of regions where the auxiliary capacitance line 14 and the slit 15 intersect, a plurality of covered metal portions 19 projecting from the drain line 13 are formed so as to cover the region.
- the pixel electrode 12 overlaps with one scanning signal line 21 in the vicinity of the long side, and the auxiliary capacitance line 14 is formed near the center of the pixel electrode 12.
- the scanning signal line 21 and the slit 15 provided in the pixel electrode 12 intersect in the same manner as described above, and a plurality of regions where the auxiliary capacitance line 14 and the slit 15 intersect.
- the liquid crystal display panel 2 ′′ As shown in FIG. 7B, a plurality of regions (surrounded by broken lines) where the opening region of the slit 15 provided in the pixel electrode 12 and the scanning signal line 21 intersect. In each region, a part of the drain line 13 extends along the short side of the pixel electrode 12 so as to cover the scanning signal line 21 between the layer of the pixel electrode 12 and the layer of the scanning signal line 21.
- the covering metal part 19 is provided.
- the auxiliary capacitance line 14 is covered between the pixel electrode 12 layer and the auxiliary capacitance line 14 layer.
- a covered metal part 19 in which a part of the drain line 13 is widened is provided.
- the covering metal portion 19 is configured by the drain line 13, but may be configured by the data signal line 22, or may be configured by an intermediate electrode (not shown) or an independent shield metal.
- the pixel electrode 12 is horizontally long, that is, the longitudinal direction of the pixel electrode 12 is parallel to the scanning signal line 21, but the pixel electrode 12 is vertically long, that is, the longitudinal direction of the pixel electrode 12 is scanned.
- the configuration may be perpendicular to the signal line 21.
- Multi-pixel structure As a technique for improving the viewing angle dependency of the ⁇ characteristic of a liquid crystal display panel (difference between the ⁇ characteristic when the liquid crystal display device is observed from the front and the ⁇ characteristic when observed from the oblique direction), a pixel division method (so-called Multi-pixel technology).
- the pixel division type liquid crystal display panel has a multi-pixel structure in which one pixel is composed of a plurality of sub-pixels.
- the present invention can also be applied to a liquid crystal display panel having a multi-pixel structure.
- FIG. 8 is a diagram illustrating a configuration of a liquid crystal display panel 200 having a multi-pixel structure.
- the liquid crystal display panel 200 includes data signal lines 220 and scanning signal lines 210 that are orthogonal to each other, auxiliary capacitance lines 140a and 140b, and pixels arranged in a matrix.
- Each pixel is provided corresponding to the intersection of the data signal line 220 and the scanning signal line 210, and includes sub-pixel electrodes (pixel electrode portions) 120a and 120b and TFTs 250a and 250b.
- the auxiliary capacitance lines 140a and 140b are arranged so as to cross the upper end of the subpixel electrode 120a and the lower end of the subpixel electrode 120b, respectively.
- the scanning signal line 210 is provided in parallel with the auxiliary capacitance lines 140a and 140b so as to overlap the gap between the sub-pixel electrodes 120a and 120b arranged above and below.
- the TFT 250a is formed at the corner of the subpixel electrode 120a near the intersection of the data signal line 220 and the scanning signal line 210, and extends along the data signal line 220 until the drain line 130a reaches the auxiliary capacitance line 140a. Furthermore, an auxiliary capacitance electrode portion 330a that overlaps the auxiliary capacitance line 140a is provided.
- the drain line 130a is electrically connected to the sub-pixel electrode 120a through the contact hole 240a.
- the TFT 250 b is formed at the corner of the subpixel electrode 120 b near the intersection of the data signal line 220 and the scanning signal line 210, and the drain line 130 b reaches the auxiliary capacitance line 140 b along the data signal line 220. And an auxiliary capacitance electrode portion 330b that overlaps the auxiliary capacitance line 140b.
- the drain line 130b is electrically connected to the sub-pixel electrode 120b through the contact hole 240b.
- the sub-pixel electrodes 120a and 120b form a capacitance with the auxiliary capacitance lines 140a and 140b, respectively, and also form a capacitance with the common electrode.
- the scanning signal line 210 is electrically connected to the gate electrodes of the TFTs 250a and 250b, and the data signal line 220 is electrically connected to the source electrodes 260a and 260b.
- the TFTs 250a and 250b perform a switching operation in accordance with the scanning signal supplied from the scanning signal line 210, and switch between the conduction state and the non-conduction state between the sub-pixel electrodes 120a and 120b and the data signal line 220.
- a voltage corresponding to a data signal representing an image supplied from the data signal line 220 is supplied to the subpixel electrodes 120a and 120b through the drain lines 130a and 130b, respectively.
- a voltage corresponding to the same data signal is supplied from the data signal line 220 to the subpixel electrodes 120a and 120b.
- the subpixels are supplied.
- the subpixel electrodes 120a and 120b can be set to different effective voltages via the auxiliary capacitance between the electrode and the auxiliary capacitance line.
- the voltage of the auxiliary capacitance line 140a is level shifted in the positive direction
- the voltage of the auxiliary capacitance line 140b is level shifted in the negative direction
- the voltage of the auxiliary capacitance line 140a is level shifted in the negative direction after one horizontal scanning period.
- the voltages of the auxiliary capacitance lines 140a and 140b are individually controlled by inverting the voltages of the auxiliary capacitance lines 140a and 140b every horizontal scanning period so that the voltage of the auxiliary capacitance line 140b is shifted in the positive direction. To do.
- a rectangular wave voltage that is 180 degrees out of phase is supplied to the auxiliary capacitance lines 140a and 140b, and the subpixels are subtracted by the respective capacitances of the subpixel electrode 120a and the auxiliary capacitance line 140a, and the subpixel electrode 120b and the auxiliary capacitance line 140b. There is a difference in potential between the electrode 120a and the subpixel electrode 120b.
- one pixel is composed of a high-luminance sub-pixel (bright sub-pixel) and a low-luminance sub-pixel (dark sub-pixel) to express halftones. This makes it possible to improve the viewing angle dependency of the ⁇ characteristic (for example, whitening of the screen).
- the common electrode and the subpixel electrode are used not only during the PSA process in manufacturing the liquid crystal display panel but also in the actual driving of the pixel division method.
- An equipotential line as shown in FIG. 9C is shown by the relationship between the voltage of the capacitor and the auxiliary capacitance line. Therefore, even in actual driving, alignment defects of liquid crystal molecules may be caused and display quality may be deteriorated.
- a cover 190a is provided on the drain line 130a in a layer between the pixel electrode 120a and the storage capacitor line 140a so as to cover the storage capacitor line 140a.
- the covering portion 190a protruding from the auxiliary capacitance electrode portion 330a is provided so as to cover the region where the opening region of the slit 150a and the auxiliary capacitance line 140a intersect.
- the layer of the pixel electrode 120b and the auxiliary capacitance line 140b A covering portion 190b is provided on the drain line 130b so as to cover the auxiliary capacitance line 140b between the layers.
- the present invention can be applied to a liquid crystal display panel including a substrate having a structure in which a slit of a pixel electrode intersects with a scanning signal line or an auxiliary capacitance line. It is suitable for a liquid crystal display device in which a pretilt angle is formed.
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Abstract
Description
本発明の一実施形態について図1~図8に基づいて説明すれば以下の通りである。はじめに本実施の形態に係る液晶表示装置1の概要について説明する。図1は、本実施の形態に係る液晶表示パネル2の要部構成を模式的に示す断面図である。また、図2は、本実施の形態にかかる液晶表示装置の概略構成を示すブロック図であり、図2の(a)は補助容量を用いて駆動する液晶表示装置1を示し、図2の(b)は補助容量を用いずに駆動する液晶表示装置1’を示している。
図1を参照して、アクティブマトリクス基板10の特徴的構成について説明する。図1に示すとおり、アクティブマトリクス基板10は、対向基板20および液晶層30と共に、液晶表示パネル2を構成している。アクティブマトリクス基板10は、透明絶縁性基板11と画素電極12とドレイン線(金属配線)13と補助容量線14とを含んで構成される。画素電極12には、スリット(配向制御間隙部)15が設けられている。スリット15を設けることによって、等電位面を変形させることによって、液晶分子の配向方位を制御する。
液晶表示装置の表示性能を向上させるためには、液晶表示パネルの製造段階において、液晶分子が良好な配向状態となるようにプレチルト角を制御する必要がある。プレチルト角の制御方法としては、例えば、PSA(Polymer Sustained Alignment;ポリマー配向支持)処理がある。PSA処理は、重合可能なモノマーを液晶に混入しておき、液晶に電圧を印加した状態において、光または熱などでモノマーを重合することにより液晶の倒れる方向を記憶させるものである。これにより、開口率を大きくするなどの目的のために配向規制力が弱い画素設計であったとしても、応答速度が速く、指押し等によっても液晶配向が乱れにくい構成を実現することができる。
上記液晶表示パネル2は、互いに対向して配置された一対の基板、すなわち、アクティブマトリクス基板10および対向基板20を備え、これら一対の基板間に液晶層30が挟持されている構成を有している。これら一対の基板の外側(両基板の対向面とは反対側の面)には、図示しない位相差板や偏光板が、必要に応じて各々設けられていてもよい。
(1)V-VcomとVd-Vcomとが逆極性
(2)V=Vcom
(3)V-VcomとVd-Vcomとが同極性、かつ、|Vd-Vcom|≧|V-Vcom|
ここで、上記第1の電位状態が(1)に対応し、上記第2の電位状態が(2)に対応し、上記第3の電位状態が(3)に対応している。
図3は、本実施の形態に係る、画素電極に通常のスリットが設けられた液晶表示パネル2aの構成例を模式的に示す平面図である。図3の(a)~(e)に示すとおり、走査信号線21およびデータ信号線22との交差部には、各々、画素電極部としての画素電極12aとスイッチング素子としてのTFT(Thin film Transistor;薄膜トランジスタ)25とが設けられている。また、TFT25は、画素電極12aの隅(隅部)または辺近傍(辺縁部)に形成されている。画素電極12aおよびTFT25は、図示しない共通電極17と共に、図1における画素7を構成している。
図4aおよび図4bは、本実施の形態に係る、画素-画素スリットが設けられた液晶表示パネル2bの構成を示す図であり、図4aは液晶表示パネル2bの構成を模式的に示す平面図であり、図4bは液晶表示パネル2bの構成を模式的に示す断面図であり、図4aにおいて、A-Bで示される領域の断面図である。
図6は、本実施の形態に係る、画素電極に前記微細スリットが設けられた液晶表示パネル2cの構成を模式的に示す平面図である。図6に示すとおり、走査信号線21およびデータ信号線22との交差部には、各々、画素電極部としての画素電極12cとスイッチング素子としてのTFT25とが設けられている。なお、図6では、画素電極12cにおいて、黒線が微細スリット15cを表している。つまり、黒線以外の箇所が画素電極12cを表している。
図3~5では、縦長絵素の構成について示されているが、液晶表示パネルの設計によっては、横長絵素の画素構造、すなわち、横長のRGBの各絵素が縦に並んで1つの画素を構成する構造となる場合がある。図7は、横長絵素の画素構造を有する液晶表示パネルの構成を示す図であり、(a)は画素電極12の領域内を、走査信号線21が画素電極12の長手方向に沿って横切るように形成されている構成を示し、(b)は画素電極12の領域内を、補助容量線14が画素電極12の長手方向に沿って横切るように形成されるとともに、画素電極12が、その2つの長辺のうち一方の長辺近傍で走査信号線21とオーバーラップしている構成を示す図である。
液晶表示パネルのγ特性の視角依存性(液晶表示装置を正面から観測した時のγ特性と斜めから観測した時のγ特性との差異)を改善するための一手法として、画素分割方式(いわゆるマルチ画素技術)がある。画素分割方式の液晶表示パネルは、1画素を複数の副画素で構成するマルチ画素構造を有している。そして、本発明は、マルチ画素構造を有する液晶表示パネルにも適用可能である。
2 液晶表示パネル
3 制御回路
4 ゲート駆動回路
5 ソース駆動回路
6 CS駆動回路
7 画素
10 アクティブマトリクス基板
11 透明絶縁性基板
12 画素電極(画素電極部)
13 ドレイン線(金属配線)
14 補助容量線
15 スリット(配向制御間隙部)
16 透明絶縁性基板
17 共通電極
18 リブ(配向制御部)
19 被覆金属部(金属層、被覆部)
20 対向基板
21 走査信号線
22 データ信号線(信号配線)
24 コンタクトホール
25 TFT(スイッチング素子)
26 ソース電極
27 ドレイン電極
30 液晶層
31 層間絶縁膜
32 ゲート絶縁膜
33 ガラス基板
Claims (23)
- 複数の走査信号線と、
該走査信号線に交差するように配置された複数の信号配線と、
上記各走査信号線と各信号配線との組み合わせに対応して設けられた画素電極部によって構成される画素部であって、液晶分子の配向状態を制御する配向制御間隙部を有する画素部と、
上記走査信号線から供給される走査信号に応じて、上記信号配線と上記画素電極部とを導通状態または非導通状態に切り替えるスイッチング素子と、
上記スイッチング素子に接続され、上記スイッチング素子が導通状態のときに、上記信号配線からのデータ信号を上記画素電極部に供給する金属配線と、
上記画素電極部との間で電気容量を形成する補助容量線とを備えたアクティブマトリクス基板であって、
上記補助容量線または上記走査信号線と、上記配向制御間隙部とが交差する領域において、上記画素部の層と上記補助容量線または上記走査信号線の層との間に、少なくとも上記補助容量線または上記走査信号線を覆うように、金属層が形成されていることを特徴とするアクティブマトリクス基板。 - 複数の走査信号線と、
該走査信号線に交差するように配置された複数の信号配線と、
上記各走査信号線と各信号配線との組み合わせに対応して設けられた画素電極部によって構成される画素部であって、液晶分子の配向状態を制御する配向制御間隙部を有する画素部と、
上記走査信号線から供給される走査信号に応じて、上記信号配線と上記画素電極部とを導通状態または非導通状態に切り替えるスイッチング素子と、
上記スイッチング素子に接続され、上記スイッチング素子が導通状態のときに、上記信号配線からのデータ信号を上記画素電極部に供給する金属配線とを備えたアクティブマトリクス基板であって、
上記走査信号線と、上記配向制御間隙部とが交差する領域において、上記画素部の層と上記走査信号線の層との間に、少なくとも上記走査信号線を覆うように、金属層が形成されていることを特徴とするアクティブマトリクス基板。 - 上記金属層は、上記金属配線または上記信号配線の少なくともいずれかを含んで構成されることを特徴とする請求項1または2に記載のアクティブマトリクス基板。
- 上記配向制御間隙部は、上記画素電極部に個別に形成された細孔であることを特徴とする請求項1から3までのいずれか1項に記載のアクティブマトリクス基板。
- 上記配向制御間隙部は、上記画素部を構成する複数の上記画素電極部の間に形成された間隙であることを特徴とする請求項1から3までのいずれか1項に記載のアクティブマトリクス基板。
- 上記配向制御間隙部は、上記画素電極部に切込みを入れることによって形成された細隙であることを特徴とする請求項1から3までのいずれか1項に記載のアクティブマトリクス基板。
- 上記画素電極部は、複数の副画素電極を備えたマルチ画素電極であり、画素分割方式によって駆動されることを特徴とする請求項1から6までのいずれか1項に記載のアクティブマトリクス基板。
- 上記画素電極部の隅部に形成された上記スイッチング素子から、上記画素電極部を横切るように配された上記補助容量線まで延伸させた上記金属配線としてのドレイン線に、上記配向制御間隙部と上記補助容量線とが交差する上記領域において、少なくとも上記補助容量線を覆う被覆部を形成したことを特徴とする請求項1に記載のアクティブマトリクス基板。
- 上記画素電極部を横切るように上記走査信号線が配されると共に、上記走査信号線と略平行に上記画素電極部を横切るように上記補助容量線が配されており、上記画素電極部に形成された上記スイッチング素子から、上記画素電極部を横切るように配された上記補助容量線と上記配向制御間隙部とが交差する上記領域と、上記走査信号線と上記配向制御間隙部とが交差する上記領域との少なくともいずれかまで、上記金属配線としてのドレイン線を延伸させ、少なくとも上記補助容量線および上記走査信号線を上記各領域において覆う被覆部を上記ドレイン線の一部として形成したことを特徴とする請求項1に記載のアクティブマトリクス基板。
- 上記画素電極部の端部を横切るように上記走査信号線が配されると共に、上記走査信号線と略平行に上記画素電極部の中央を横切るように上記補助容量線が配されており、
上記画素電極部の隅部に形成された上記スイッチング素子から、上記画素電極部を横切るように配された上記補助容量線と上記配向制御間隙部とが交差する上記領域と、上記走査信号線と上記配向制御間隙部とが交差する上記領域との少なくともいずれかまで延伸させた上記金属配線としてのドレイン線に、少なくとも上記補助容量線および上記走査信号線を上記各領域において覆う被覆部を形成したことを特徴とする請求項1に記載のアクティブマトリクス基板。 - 上記画素電極部の中央を横切るように上記走査信号線が配されると共に、上記走査信号線と略平行に上記画素電極部の端部を横切るように上記補助容量線が配されており、
上記画素電極部の辺縁部に形成された上記スイッチング素子から、上記画素電極部を横切るように配された上記補助容量線と上記配向制御間隙部とが交差する上記領域と、上記走査信号線と上記配向制御間隙部とが交差する上記領域との少なくともいずれかまで延伸させた上記金属配線としてのドレイン線に、少なくとも上記補助容量線および上記走査信号線を上記各領域において覆う被覆部を形成したことを特徴とする請求項1に記載のアクティブマトリクス基板。 - 上記画素電極部の長手方向の辺が、上記走査信号線と略平行に形成されていることを特徴とする請求項10または11に記載のアクティブマトリクス基板。
- 1つの上記画素電極部内に隣り合って設けられた上記配向制御間隙部が鋭角的に接近した部位と重なるように上記補助容量線が形成されており、
上記画素電極部の隅部に形成された上記スイッチング素子から、上記補助容量線まで延伸させた上記金属配線としてのドレイン線に、上記配向制御間隙部と上記補助容量線とが交差する上記領域において、少なくとも上記補助容量線を覆う被覆部を形成したことを特徴とする請求項1に記載のアクティブマトリクス基板。 - 複数の上記画素電極部の間隙として形成された上記配向制御間隙部を横切るように上記補助容量線が形成されており、
上記画素電極部の隅部に形成された上記スイッチング素子から、上記補助容量線まで延伸させた上記金属配線としてのドレイン線に、上記配向制御間隙部と上記補助容量線とが交差する上記領域において、少なくとも上記補助容量線を覆う被覆部を形成したことを特徴とする請求項1に記載のアクティブマトリクス基板。 - 複数の上記画素電極部の間隙として形成された上記配向制御間隙部を横切るように上記補助容量線が形成されており、
上記画素電極部の隅部に形成された上記スイッチング素子から、上記補助容量線に交差するように延伸させた上記信号配線としてのデータ信号線に、上記配向制御間隙部と上記補助容量線とが交差する上記領域において、少なくとも上記補助容量線を覆う被覆部を形成したことを特徴とする請求項1に記載のアクティブマトリクス基板。 - 上記画素電極部に形成された上記スイッチング素子から、上記画素電極部を横切るように配された上記走査信号線まで延伸させた上記金属配線としてのドレイン線に、上記配向制御間隙部と上記走査信号線とが交差する上記領域において、少なくとも上記走査信号線を覆う被覆部を形成したことを特徴とする請求項2に記載のアクティブマトリクス基板。
- 請求項1から16までのいずれか1項に記載のアクティブマトリクス基板と、共通電極が設けられた対向基板とを有し、これら各基板の間に液晶層を備えていることを特徴とする液晶表示パネル。
- 上記対向基板は、液晶分子の配向状態を制御する配向制御部を備えていることを特徴とする請求項17に記載の液晶表示パネル。
- 請求項17または18に記載の液晶表示パネルと、該液晶表示パネルを駆動する駆動回路とを備えていることを特徴とする液晶表示装置。
- 複数の走査信号線と、該走査信号線に交差するように配置された複数の信号配線と、上記各走査信号線と各信号配線との組み合わせに対応して設けられた画素電極部によって構成される画素部であって、液晶分子の配向状態を制御する配向制御間隙部を有する画素部と、上記走査信号線から供給される走査信号に応じて、上記信号配線と上記画素電極部とを導通状態または非導通状態に切り替えるスイッチング素子と、上記スイッチング素子に接続され、上記スイッチング素子が導通状態のときに、上記信号配線からのデータ信号を上記画素電極部に供給する金属配線と、上記画素電極部との間で電気容量を形成する補助容量線とを備えたアクティブマトリクス基板の製造方法であって、
上記補助容量線または上記走査信号線と、上記配向制御間隙部とが交差する領域において、少なくとも上記補助容量線または上記走査信号線を覆うように、金属層を形成する工程を含んでいることを特徴とするアクティブマトリクス基板の製造方法。 - 複数の走査信号線と、該走査信号線に交差するように配置された複数の信号配線と、上記各走査信号線と各信号配線との組み合わせに対応して設けられた画素電極部によって構成される画素部であって、液晶分子の配向状態を制御する配向制御間隙部を有する画素部と、上記走査信号線から供給される走査信号に応じて、上記信号配線と上記画素電極部とを導通状態または非導通状態に切り替えるスイッチング素子と、上記スイッチング素子に接続され、上記スイッチング素子が導通状態のときに、上記信号配線からのデータ信号を上記画素電極部に供給する金属配線とを備えたアクティブマトリクス基板の製造方法であって、
上記走査信号線と、上記配向制御間隙部とが交差する領域において、上記画素部の層と上記走査信号線の層との間に、少なくとも上記走査信号線を覆うように、金属層を形成する工程を含んでいることを特徴とするアクティブマトリクス基板の製造方法。 - 請求項17または18に記載の液晶表示パネルの製造方法であって、
上記金属層の電位から上記共通電極の電位を減算した電位差と、上記画素電極部の電位から上記共通電極の電位を減算した電位差とが逆極性の第1の電位状態、上記金属層の電位と上記共通電極の電位とが等しい第2の電位状態、および、上記金属層の電位から上記共通電極の電位を減算した電位差と、上記画素電極部の電位から上記共通電極の電位を減算した電位差とが同極性で、かつ、上記画素電極部の電位と上記共通電極の電位との差の絶対値が、上記金属層の電位と上記共通電極の電位との差の絶対値以上となる第3の電位状態のうち、いずれか1つの電位状態において、上記液晶層に電圧を印加して、予め上記液晶層に混入されたモノマーを重合することにより、上記液晶層の液晶分子にプレチルト角を付与するポリマー配向支持工程を含んでいることを特徴とする液晶表示パネルの製造方法。 - 請求項17または18に記載の液晶表示パネルの駆動方法であって、
上記金属層の電位から上記共通電極の電位を減算した電位差と、上記画素電極部の電位から上記共通電極の電位を減算した電位差とが逆極性の第1の電位状態、上記金属層の電位と上記共通電極の電位とが等しい第2の電位状態、および、上記金属層の電位から上記共通電極の電位を減算した電位差と、上記画素電極部の電位から上記共通電極の電位を減算した電位差とが同極性で、かつ、上記画素電極部の電位と上記共通電極の電位との差の絶対値が、上記金属層の電位と上記共通電極の電位との差の絶対値以上となる第3の電位状態のうち、いずれか1つの電位状態において、上記液晶層に電圧を印加することを特徴とする液晶表示パネルの駆動方法。
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012169466A1 (ja) * | 2011-06-10 | 2012-12-13 | シャープ株式会社 | 表示装置 |
EP2574979A1 (en) * | 2011-09-29 | 2013-04-03 | HannStar Display Corp. | Fringe field switching liquid crystal display apparatus |
JP2013088515A (ja) * | 2011-10-14 | 2013-05-13 | Japan Display Central Co Ltd | 液晶表示装置 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003149647A (ja) | 2001-08-31 | 2003-05-21 | Fujitsu Display Technologies Corp | 液晶表示装置及びその製造方法 |
JP2003177408A (ja) | 2001-10-02 | 2003-06-27 | Fujitsu Display Technologies Corp | 液晶表示装置およびその製造方法 |
JP2005134889A (ja) * | 2003-10-01 | 2005-05-26 | Samsung Electronics Co Ltd | 薄膜トランジスタ表示板及びこれを含む液晶表示装置 |
JP2006178445A (ja) * | 2004-12-20 | 2006-07-06 | Samsung Electronics Co Ltd | 薄膜トランジスタ表示板及びその製造方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5953088A (en) | 1997-12-25 | 1999-09-14 | Kabushiki Kaisha Toshiba | Liquid crystal display with shield electrodes arranged to alternately overlap adjacent pixel electrodes |
US20030067579A1 (en) | 2001-10-02 | 2003-04-10 | Fujitsu Limited | Liquid crystal display device and method of fabricating the same |
US6778229B2 (en) | 2001-10-02 | 2004-08-17 | Fujitsu Display Technologies Corporation | Liquid crystal display device and method of fabricating the same |
JP4344131B2 (ja) | 2002-12-19 | 2009-10-14 | 奇美電子股▲ふん▼有限公司 | 画像表示装置 |
CN100451784C (zh) * | 2004-01-29 | 2009-01-14 | 夏普株式会社 | 显示装置 |
KR101086477B1 (ko) * | 2004-05-27 | 2011-11-25 | 엘지디스플레이 주식회사 | 표시 소자용 박막 트랜지스터 기판 제조 방법 |
KR20060015201A (ko) * | 2004-08-13 | 2006-02-16 | 삼성전자주식회사 | 어레이 기판과, 이를 갖는 모기판 및 액정표시장치 |
KR101109978B1 (ko) * | 2004-12-13 | 2012-02-29 | 엘지디스플레이 주식회사 | 고개구율 액정표시소자 |
KR101133760B1 (ko) * | 2005-01-17 | 2012-04-09 | 삼성전자주식회사 | 박막 트랜지스터 표시판 및 이를 포함하는 액정 표시 장치 |
JP4628801B2 (ja) * | 2005-01-19 | 2011-02-09 | シャープ株式会社 | 液晶表示装置 |
KR20070080098A (ko) * | 2006-02-06 | 2007-08-09 | 삼성전자주식회사 | 액정 표시 장치 |
KR101231867B1 (ko) * | 2006-02-23 | 2013-02-08 | 삼성디스플레이 주식회사 | 액정표시장치 |
-
2009
- 2009-08-07 WO PCT/JP2009/064029 patent/WO2010058635A1/ja active Application Filing
- 2009-08-07 JP JP2010539174A patent/JP5122654B2/ja not_active Expired - Fee Related
- 2009-08-07 CN CN200980144665.7A patent/CN102209929B/zh not_active Expired - Fee Related
- 2009-08-07 US US13/127,846 patent/US8736779B2/en active Active
- 2009-08-07 BR BRPI0921166A patent/BRPI0921166A2/pt not_active IP Right Cessation
- 2009-08-07 EP EP09827416.0A patent/EP2390718B1/en not_active Not-in-force
- 2009-08-07 RU RU2011120013/28A patent/RU2011120013A/ru unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003149647A (ja) | 2001-08-31 | 2003-05-21 | Fujitsu Display Technologies Corp | 液晶表示装置及びその製造方法 |
JP2003177408A (ja) | 2001-10-02 | 2003-06-27 | Fujitsu Display Technologies Corp | 液晶表示装置およびその製造方法 |
JP2005134889A (ja) * | 2003-10-01 | 2005-05-26 | Samsung Electronics Co Ltd | 薄膜トランジスタ表示板及びこれを含む液晶表示装置 |
JP2006178445A (ja) * | 2004-12-20 | 2006-07-06 | Samsung Electronics Co Ltd | 薄膜トランジスタ表示板及びその製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2390718A4 * |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8681297B2 (en) | 2010-02-24 | 2014-03-25 | Sharp Kabushiki Kaisha | Liquid crystal display panel, and liquid crystal display device |
JPWO2011132452A1 (ja) * | 2010-04-20 | 2013-07-18 | シャープ株式会社 | 液晶表示パネルおよび液晶表示装置 |
JP5791593B2 (ja) * | 2010-04-20 | 2015-10-07 | ユニファイド イノヴェイティヴ テクノロジー, エルエルシー | 液晶表示パネルおよび液晶表示装置 |
WO2012169466A1 (ja) * | 2011-06-10 | 2012-12-13 | シャープ株式会社 | 表示装置 |
EP2574979A1 (en) * | 2011-09-29 | 2013-04-03 | HannStar Display Corp. | Fringe field switching liquid crystal display apparatus |
JP2013088515A (ja) * | 2011-10-14 | 2013-05-13 | Japan Display Central Co Ltd | 液晶表示装置 |
US9019439B2 (en) | 2011-10-14 | 2015-04-28 | Japan Display Inc. | Liquid crystal display device |
WO2013161761A1 (ja) * | 2012-04-27 | 2013-10-31 | シャープ株式会社 | 液晶表示素子および液晶表示装置 |
JP5815127B2 (ja) * | 2012-04-27 | 2015-11-17 | シャープ株式会社 | 液晶表示素子および液晶表示装置 |
JP2015179235A (ja) * | 2013-06-05 | 2015-10-08 | 株式会社半導体エネルギー研究所 | 表示装置及び電子機器 |
US10503018B2 (en) | 2013-06-05 | 2019-12-10 | Semiconductor Energy Laboratory Co., Ltd. | Display device and electronic device |
Also Published As
Publication number | Publication date |
---|---|
US8736779B2 (en) | 2014-05-27 |
EP2390718A4 (en) | 2013-01-23 |
JP5122654B2 (ja) | 2013-01-16 |
RU2011120013A (ru) | 2012-12-27 |
BRPI0921166A2 (pt) | 2016-02-23 |
US20110242073A1 (en) | 2011-10-06 |
CN102209929A (zh) | 2011-10-05 |
EP2390718B1 (en) | 2014-11-05 |
JPWO2010058635A1 (ja) | 2012-04-19 |
CN102209929B (zh) | 2014-09-17 |
EP2390718A1 (en) | 2011-11-30 |
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