WO2010106709A1 - アクティブマトリクス基板、及び表示装置 - Google Patents
アクティブマトリクス基板、及び表示装置 Download PDFInfo
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- WO2010106709A1 WO2010106709A1 PCT/JP2009/069378 JP2009069378W WO2010106709A1 WO 2010106709 A1 WO2010106709 A1 WO 2010106709A1 JP 2009069378 W JP2009069378 W JP 2009069378W WO 2010106709 A1 WO2010106709 A1 WO 2010106709A1
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- wiring
- active matrix
- matrix substrate
- auxiliary capacitance
- light shielding
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136231—Active matrix addressed cells for reducing the number of lithographic steps
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/40—Arrangements for improving the aperture ratio
Definitions
- the present invention relates to an active matrix substrate in which a plurality of data lines and a plurality of scanning lines are arranged in a matrix, and a display device using the same.
- liquid crystal display devices have been widely used in liquid crystal televisions, monitors, mobile phones and the like as flat panel displays having features such as thinness and light weight compared to conventional cathode ray tubes.
- a plurality of data wirings (source wirings) and a plurality of scanning wirings (gate wirings) are wired in a matrix, and a thin film transistor (TFT: Thin) is provided near the intersection of the data wirings and the scanning wirings.
- TFT Thin
- a conventional active matrix substrate has two auxiliary capacitances sandwiched between data wirings as described in Patent Document 1 below, for example.
- this conventional active matrix substrate it is possible to reduce the capacitive coupling between the data wiring and the auxiliary capacitor electrode provided so as to face a part of the pixel electrode without reducing the aperture ratio. It was.
- the above two substrates are usually opposed to the counter substrate disposed facing the active matrix substrate.
- a black matrix is provided above the picture elements so as to cover each end of the picture elements.
- two auxiliary capacitor wirings 51a and 51b are provided on the base member 50 so as to be parallel to each other.
- the wirings 51a and 51b are covered with an insulating film 52.
- the data wiring 53 is formed on the insulating film 52 between the two auxiliary capacitance wirings 51 a and 51 b, and the data wiring 53 is covered with the insulating film 54.
- the picture element electrode 55 included in each of the two adjacent picture elements is provided on the insulating film 54. And the black matrix 56 was installed so that each edge part of these two picture element electrodes 55 might be covered.
- the two auxiliary capacitance lines 51 a and 51 b are provided so as to sandwich the data line 53, so that the distance between the two pixel electrodes 55 is separated.
- the distance between two adjacent picture elements it is necessary to increase the distance between two adjacent picture elements, and it is also necessary to increase the dimension of the black matrix (the horizontal dimension in the figure).
- the conventional active matrix substrate it has been difficult for the conventional active matrix substrate to improve the aperture ratio of the picture element.
- the dimension in the left-right direction is generally used. Was increased by several microns. For this reason, with the conventional active matrix substrate, it has become more difficult to improve the aperture ratio of the picture element.
- the present invention provides an active matrix substrate capable of improving the aperture ratio while preventing light leakage between two adjacent picture elements, and a display device using the active matrix substrate. With the goal.
- an active matrix substrate is provided in the vicinity of a plurality of data wirings and a plurality of scanning wirings arranged in a matrix and an intersection of the data wirings and the scanning wirings.
- An active matrix substrate that is used as a substrate of a display panel, and a picture element having a picture element electrode connected to the switching element.
- a substrate provided so that one and the other of the data wiring and the scanning wiring intersect each other,
- On the base material On the base material, a light-blocking block that shields light from each end of the two adjacent pixel electrodes is provided.
- a light-shielding block that shields each end of two adjacent pixel electrodes is provided on the base material. Accordingly, light leakage between two adjacent picture elements can be prevented by the light blocking block regardless of the presence or absence of the black matrix. Therefore, unlike the conventional example, the aperture ratio can be improved while preventing light leakage between two adjacent picture elements.
- the light shielding block is formed of the same material and the same layer as the scanning wiring on the base material,
- the light shielding block may be provided on the base material such that an end thereof is not connected to the scanning wiring.
- the light shielding block can be easily formed.
- the data wiring may be widened so as to cover an unconnected separation region between the scanning wiring and an end of the light shielding block.
- the active matrix substrate includes auxiliary capacitance wiring for generating auxiliary capacitance
- the shading block is formed of the same layer and the same material as the auxiliary capacitance wiring on the base material
- the light shielding block may be provided on the base material so that an end thereof is not connected to the auxiliary capacitance wiring.
- the light shielding block can be easily formed.
- the data wiring may be widened so as to cover an unconnected separation region between the auxiliary capacitor wiring and the end of the light shielding block.
- the active matrix substrate includes auxiliary capacitance wiring for generating auxiliary capacitance
- the light shielding block is formed of the same material and the same layer as the scanning wiring and the auxiliary capacitance wiring on the base material, It is preferable that the light shielding block is provided on the base material so that an end thereof is not connected to the scanning wiring and the auxiliary capacitance wiring.
- the light shielding block can be easily formed.
- an unconnected separation region between the scanning wiring and the end portion of the light shielding block and between the auxiliary capacitance wiring and the end portion of the light shielding block are arranged.
- the wiring width may be increased so as to cover the isolation region that is not connected.
- the active matrix substrate includes auxiliary capacitance wiring for generating auxiliary capacitance
- the shading block is formed of the same layer and the same material as the auxiliary capacitance wiring on the base material
- the light shielding block may be provided on the base material so that an end thereof is connected to the auxiliary capacitance wiring.
- the shading block can be used for generating the auxiliary capacity.
- the light shielding block is provided on the base material so as to face each end of the two adjacent pixel electrodes.
- the display device of the present invention is a display device including a display unit, Any one of the active matrix substrates described above is used for the display section.
- an active matrix substrate that can improve the aperture ratio while preventing light leakage between two adjacent picture elements is used for the display unit.
- a high-performance display device having a fine display portion can be easily configured.
- FIG. 1 is a schematic cross-sectional view illustrating a liquid crystal display device according to a first embodiment of the present invention.
- FIG. 2 is a diagram for explaining a main configuration of the active matrix substrate and the liquid crystal display device according to the first embodiment.
- FIG. 3 is a diagram for explaining a specific configuration of the picture element shown in FIG.
- FIG. 4A is a plan view showing the configuration of the auxiliary capacitance electrode shown in FIG. 4B is a plan view showing the configuration of the gate wiring, auxiliary capacitance wiring, and light shielding block shown in FIG.
- FIG. 4C is a plan view showing the configuration of the source wiring shown in FIG.
- FIG. 4D is a plan view showing the configuration of the pixel electrode shown in FIG.
- FIG. 5 is a cross-sectional view taken along line VV in FIG. 6 is a cross-sectional view taken along line VI-VI in FIG.
- FIG. 7 is a diagram for explaining a specific configuration of picture elements on an active matrix substrate according to the second embodiment of the present invention.
- FIG. 8A is a plan view showing the configuration of the gate wiring, auxiliary capacitance wiring, and light shielding block shown in FIG.
- FIG. 8B is a plan view showing a configuration of the source wiring shown in FIG.
- FIG. 9 is a diagram for explaining the problems of the conventional active matrix substrate.
- FIG. 1 is a schematic cross-sectional view illustrating a liquid crystal display device according to a first embodiment of the present invention.
- the liquid crystal display device 1 of the present embodiment includes a liquid crystal panel 2 as a display unit installed on the upper side of the figure as the viewing side (display surface side), and the non-display surface side of the liquid crystal panel 2 (lower side of the figure).
- an illuminating device 3 that generates illumination light that illuminates the liquid crystal panel 2.
- the liquid crystal panel 2 is provided on the liquid crystal layer 4, the active matrix substrate 5 and the color filter substrate 6 of the present invention sandwiching the liquid crystal layer 4, and the outer surfaces of the active matrix substrate 5 and the color filter substrate 6, respectively.
- Polarizing plates 7 and 8 are provided.
- the liquid crystal panel 2 is provided with a driver device 9 for driving the liquid crystal panel 2 and a drive circuit device 10 connected to the driver device 9 via the flexible printed circuit board 11.
- the liquid crystal layer 4 can be driven in units of picture elements.
- the polarization state of the illumination light incident through the polarizing plate 7 is modulated by the liquid crystal layer 4 and the amount of light passing through the polarizing plate 8 is controlled, so that a desired image is displayed. Is done.
- the illuminating device 3 is provided with a bottomed chassis 12 opened on the upper side (liquid crystal panel 2 side) in the figure, and a frame-like frame 13 installed on the liquid crystal panel 2 side of the chassis 12.
- the chassis 12 and the frame 13 are made of metal or synthetic resin and are sandwiched by a bezel 14 having an L-shaped cross section in a state where the liquid crystal panel 2 is installed above the frame 13.
- the illuminating device 3 is assembled to the liquid crystal panel 2 and integrated as a transmissive liquid crystal display device 1 in which illumination light from the illuminating device 3 enters the liquid crystal panel 2.
- the illumination device 3 is provided on the inner surface of the chassis 12, the diffusion plate 15 installed so as to cover the opening of the chassis 12, the optical sheet 17 installed on the liquid crystal panel 2 side above the diffusion plate 15.
- the reflection sheet 21 is provided.
- a plurality of, for example, six cold cathode fluorescent tubes 20 are provided inside the chassis 12 on the lower side of the liquid crystal panel 2 to constitute a direct-type lighting device 3.
- the light from each cold cathode fluorescent tube 20 is radiate
- the configuration using the direct illumination device 3 has been described.
- the present embodiment is not limited to this, and an edge light illumination device having a light guide plate may be used.
- the illuminating device which has other light sources, such as hot cathode fluorescent tubes other than a cold cathode fluorescent tube, and LED, can also be used.
- the diffusion plate 15 is made of, for example, a rectangular synthetic resin or glass material having a thickness of about 2 mm, and diffuses light from the cold cathode fluorescent tube 20 and emits the light to the optical sheet 17 side.
- the diffusion plate 15 is mounted on a frame-like surface provided on the upper side of the chassis 12 on the four sides, and the surface of the chassis 12 and the surface of the frame 13 are interposed with an elastically deformable pressing member 16 interposed therebetween. It is incorporated in the lighting device 3 in a state of being held between the inner surface and the inner surface. Further, the diffusion plate 15 is supported at its substantially central portion by a transparent support member (not shown) installed inside the chassis 12, and is prevented from bending inside the chassis 12.
- the diffusion plate 15 is movably held between the chassis 12 and the pressing member 16, and the diffusion plate is affected by heat such as heat generation of the cold cathode fluorescent tube 20 and temperature rise inside the chassis 12. 15, even when expansion (plastic) deformation occurs, the pressing member 16 is elastically deformed so that the plastic deformation is absorbed and the diffusibility of light from the cold cathode fluorescent tube 20 is not reduced as much as possible. Yes. Further, the use of the diffusion plate 15 made of a glass material that is more resistant to heat than the synthetic resin is preferable in that warpage, yellowing, thermal deformation, and the like due to the influence of the heat are less likely to occur.
- the optical sheet 17 includes a light collecting sheet made of, for example, a synthetic resin film having a thickness of about 0.5 mm, and is configured to increase the luminance of the illumination light to the liquid crystal panel 2.
- the optical sheet 17 may be appropriately laminated with known optical sheet materials such as a prism sheet, a diffusion sheet, and a polarizing sheet for improving display quality on the display surface of the liquid crystal panel 2 as necessary. It has become. Then, the optical sheet 17 converts the light emitted from the diffusion plate 15 into planar light having a predetermined luminance (for example, 5000 cd / m 2 ) or more and uniform luminance, and is used as illumination light for the liquid crystal panel 2. It is comprised so that it may inject into the side.
- an optical member such as a diffusion sheet for adjusting the viewing angle of the liquid crystal panel 2 may be appropriately stacked above the liquid crystal panel 2 (display surface side).
- a protruding portion that protrudes to the left in FIG. 1 is formed at the central portion on the left end side in FIG. 1 that is on the upper side when the liquid crystal display device 1 is actually used.
- the protruding portion is sandwiched between the inner surface of the frame 13 and the pressing member 16 with the elastic material 18 interposed therebetween.
- the optical sheet 17 can be expanded and contracted inside the lighting device 3. Built in state. Thereby, in the optical sheet 17, even when expansion / contraction (plastic) deformation occurs due to the influence of the heat such as the heat generation of the cold cathode fluorescent tube 20, free expansion / contraction deformation based on the protruding portion becomes possible.
- the optical sheet 17 is configured to prevent wrinkles and deflections from occurring as much as possible. As a result, in the liquid crystal display device 1, it is possible to prevent the display quality of the liquid crystal panel 2 from being deteriorated as much as possible due to the bending of the optical sheet 17 or the like on the display surface of the liquid crystal panel 2.
- Each cold cathode fluorescent tube 20 is a straight tube, and electrode portions (not shown) provided at both ends thereof are supported outside the chassis 12.
- each cold cathode fluorescent tube 20 is a thin tube having a diameter of about 3.0 to 4.0 mm and excellent in luminous efficiency.
- Each cold cathode fluorescent tube 20 includes a light source holder (not shown).
- the distance between each of the diffusion plate 15 and the reflection sheet 21 is held in the chassis 12 in a state where the distance is maintained at a predetermined distance.
- the cold cathode fluorescent tube 20 is arranged so that its longitudinal direction is parallel to a direction orthogonal to the direction of gravity action. As a result, in the cold cathode fluorescent tube 20, mercury (vapor) enclosed therein is prevented from gathering on one end side in the longitudinal direction due to the action of gravity, and the lamp life is greatly improved. Yes.
- the reflection sheet 21 is made of a metal thin film having a high light reflectance such as aluminum or silver having a thickness of about 0.2 to 0.5 mm, for example, and reflects light from the cold cathode fluorescent tube 20 toward the diffusion plate 15. To function as a reflector. Thereby, in the illuminating device 3, the light emitted from the cold cathode fluorescent tube 20 can be efficiently reflected to the diffusion plate 15 side, and the use efficiency of the light and the luminance at the diffusion plate 15 can be increased.
- a reflective sheet material made of synthetic resin is used in place of the metal thin film, or the inner surface of the chassis 12 is reflected by applying a paint having a high light reflectance such as white. It can also function as a plate.
- FIG. 2 is a diagram for explaining a main configuration of the active matrix substrate and the liquid crystal display device according to the first embodiment.
- the liquid crystal display device 1 includes a panel control unit 22 that controls driving of the liquid crystal panel 2 (FIG. 1) as the display unit that displays information such as characters and images, and the panel control.
- a source driver 23 and a gate driver 24 that operate based on an instruction signal from the unit 22 are provided.
- the panel control unit 22 is provided in the drive circuit device 10 (FIG. 1), and receives a video signal from the outside of the liquid crystal display device 1.
- the panel control unit 22 performs predetermined image processing on the input video signal to generate instruction signals to the source driver 23 and the gate driver 24, and the input video signal.
- a frame buffer 22b capable of storing display data for one frame included.
- the panel control unit 22 performs drive control of the source driver 23 and the gate driver 24 in accordance with the input video signal, so that information corresponding to the video signal is displayed on the liquid crystal panel 2.
- the source driver 23 and the gate driver 24 are provided in the drive device 9 (FIG. 1), and are installed on the active matrix substrate 5 of the present embodiment that constitutes the array substrate. Specifically, the source driver 23 is installed on the surface of the active matrix substrate 5 so as to be along the lateral direction of the liquid crystal panel 2 in the outer area of the effective display area A of the liquid crystal panel 2 as a display panel. . Further, the gate driver 24 is installed on the surface of the active matrix substrate 5 along the vertical direction of the liquid crystal panel 2 in the outer region of the effective display region A.
- the source driver 23 and the gate driver 24 are drive circuits that drive a plurality of picture elements P provided on the liquid crystal panel 2 side in units of picture elements.
- the source driver 23 and the gate driver 24 include a plurality of source lines.
- S1 to SM M is an integer of 2 or more, hereinafter collectively referred to as “S”) and a plurality of gate wirings G1 to GN (N is an integer of 2 or more and is hereinafter collectively referred to as “N”).
- S1 to SM M is an integer of 2 or more, hereinafter collectively referred to as “S”) and a plurality of gate wirings G1 to GN (N is an integer of 2 or more and is hereinafter collectively referred to as “N”).
- the source wiring S and the gate wiring G constitute a data wiring and a scanning wiring, respectively, and are arranged in a matrix so as to cross each other on a base material to be described later.
- a thin film transistor (Thin Film Transistor) 25 as a switching element and the picture element P having a picture element electrode 26 connected to the thin film transistor 25 are provided. It has been. That is, in the active matrix substrate 5, a plurality of picture element P regions are formed in each region partitioned in a matrix by the source wiring S and the gate wiring G.
- the plurality of picture elements P include red, green, and blue picture elements. Further, these red, green, and blue picture elements are sequentially arranged in parallel with each of the gate wirings G1 to GN, for example, in this order.
- each gate wiring G1 to GN is provided for each picture element P, and the gate electrode of the thin film transistor 25 is connected thereto.
- the source electrode of the thin film transistor 25 is connected to each of the source lines S1 to SM.
- the picture element electrode 26 provided for each picture element P is connected to the drain electrode of each thin film transistor 25.
- the common electrode 27 is configured to face the picture element electrode 26 with the liquid crystal layer 4 provided on the liquid crystal panel 2 interposed therebetween.
- FIG. 3 is a diagram for explaining a specific configuration of the picture element shown in FIG. 4A is a plan view showing the configuration of the auxiliary capacitance electrode shown in FIG. 3, and FIG. 4B is a plan view showing the configuration of the gate wiring, auxiliary capacitance wiring, and light shielding block shown in FIG. 4C is a plan view showing the configuration of the source wiring shown in FIG. 3, and FIG. 4D is a plan view showing the configuration of the pixel electrode shown in FIG. 5 is a cross-sectional view taken along line VV in FIG. 3, and FIG. 6 is a cross-sectional view taken along line VI-VI in FIG.
- the source wiring S and the gate wiring G are provided in parallel in the vertical direction and the horizontal direction in FIG. 3, respectively. It is defined by the source line S and two adjacent gate lines G. Further, a black matrix BM provided on the color filter substrate 6 (FIG. 1) side is provided above the source wiring S and the thin film transistor 25.
- the source wiring S, the gate wiring G, the thin film transistor 25, the pixel electrode 26, the auxiliary capacitance electrode 28, the auxiliary capacitor, and the like are formed on a base material 5 a made of, for example, a transparent glass material or synthetic resin material.
- Capacitance wiring 29 and a light shielding block 30 are formed.
- the auxiliary capacitance electrode 28 in the active matrix substrate 5, the auxiliary capacitance electrode 28, the gate wiring G, the auxiliary capacitance wiring 29, and the light shielding block 30 are directly provided on the base material 5 a.
- a gate electrode 25g of the thin film transistor 25 is integrally provided on the gate wiring G.
- the auxiliary capacitance electrode 28 and the auxiliary capacitance wiring 29 are respectively formed with a connection portion 28a and a connection portion 29a for electrical connection with each other. That is, in the auxiliary capacitance electrode 28 and the auxiliary capacitance wiring 29, one and the other of the connection portion 28a and the connection portion 29a are arranged on the upper side and the lower side, respectively, on the base material 5a and are in contact with each other.
- the auxiliary capacitance electrode 28 and the auxiliary capacitance wiring 29 are electrically connected to each other through the connection portion 28a and the connection portion 29a.
- the auxiliary capacitance electrode 28 is made of a transparent electrode film such as an ITO film. When a voltage is applied to the auxiliary capacitance wiring 29 from a power source (not shown), the auxiliary capacitance electrode 28 is applied. Generates a predetermined auxiliary capacitance between the pixel electrode 26 and the pixel electrode 26.
- the gate wiring G, the auxiliary capacitor wiring 29, and the light shielding block 30 are simultaneously formed of the same material by using, for example, a photolithography method. That is, the gate wiring G, the auxiliary capacitance wiring 29, and the light shielding block 30 are made of, for example, an Al-based material or a film in which a high dielectric material film is laminated on an underlayer or an upper surface of an Al-based material. Etching is performed using the mask subjected to the patterning, so that the masks are collectively formed on the substrate 5a.
- the light shielding block 30 is provided on the substrate 5a so that the end 30a and the end 30b are not connected to the gate wiring G and the auxiliary capacitance wiring 29, respectively. That is, the light shielding block 30 is formed with an isolation region K1 that is not connected between the end 30a and the gate line G, and is not connected between the end 30b and the auxiliary capacitance line 29. It is installed on the base material 5a so that K2 is formed. Further, the gate line G and the auxiliary capacity line 29 are formed on the base material 5a so that the isolation region K3 that is not connected between the gate electrode 25g of the gate line G and the auxiliary capacity line 29 is formed. is set up.
- the light shielding block 30 is not connected to the gate wiring G and the auxiliary capacitance wiring 29, the light shielding block 30 is provided in an electrically floating state in the active matrix substrate 5. And unnecessary parasitic capacitance is not generated between the pixel electrode 26 and the pixel electrode 26.
- the light blocking block 30 is installed on the base material 5a so as to oppose the respective end portions 26a, 26b of the two adjacent pixel electrodes 26, and the respective end portions of the two adjacent pixel electrodes 26. 26a and 26b are provided to be shielded from light.
- the light blocking block 30 is configured to prevent light leakage between two adjacent picture elements P together with a later-described thicker portion provided in the source wiring S (details will be described later).
- the source line S and the drain electrode 25d of the thin film transistor 25 are formed in a predetermined pattern.
- the source wiring S and the drain electrode 25d are made of, for example, an Al-based material or a film in which a high dielectric material film is laminated on an underlying or upper surface of an Al-based material.
- the source wiring S and the drain electrode 25d are disposed above the gate wiring G, the auxiliary capacitance electrode 28, the auxiliary capacitance wiring 29, and the light shielding block 30 with an insulating film described later interposed on the base material 5a. Is formed.
- the source electrode 25s of the thin film transistor 25 is integrally provided.
- the drain electrode 25d is electrically connected to the pixel electrode 26 through the contact hole H (FIG. 3).
- the source wiring S is provided with thick portions Sa, Sb, and Sc in which the wiring width is increased.
- These thick portions Sa to Sc are configured to cover the separation regions K1 to K3, respectively, and shield the corresponding separation regions K1 to K3. That is, the wide width portion Sa is configured to cover the separation region K1 between the gate line G and the end portion 30a of the light shielding block 30, and shields the separation region K1.
- the thick portion Sb is configured to cover the separation region K2 between the auxiliary capacitance line 29 and the end portion 30b of the light shielding block 30, and shields the separation region K2.
- the thick portion Sc is configured to cover the isolation region K3 between the gate line G and the auxiliary capacitance line 29, and shields the isolation region K3.
- the picture element electrode 26 is configured in a predetermined shape.
- the pixel electrode 26 is formed above the source line S and the drain electrode 25d on the base material 5a with an insulating film described later interposed therebetween.
- the picture element electrode 26 is made of a transparent electrode film such as an ITO film.
- a light blocking block 30 is provided below the end portion 26a and the end portion 26b so as to face each other.
- the light shielding block 30 is provided on the base material 5 a, and further, a transparent insulating film is formed so as to cover the light shielding block 30. 31 is formed.
- the source wiring S is provided on the insulating film 31 at a position directly above the central portion of the light shielding block 30, and the insulating film 32 is formed so as to cover the source wiring S. Yes.
- the pixel electrode 26 is provided on the transparent insulating film 32.
- the left end portion of the light shielding block 30 is provided so as to face the end portion 26b of the left pixel electrode 26, and the right end portion of the light shielding block 30 is the end portion 26a of the right pixel electrode 26. It is provided so as to oppose.
- the light shielding block 30 can shield the end portions 26a and 26b of the two adjacent picture element electrodes 26, and more reliably prevent light leakage between the two adjacent picture elements P. it can.
- the source wiring S and the pixel electrode 26 are provided at positions separated from each other in the vertical direction in the figure.
- the parasitic capacitance generated between the two can be significantly reduced.
- the color filter substrate 6 includes a base material 6a, a black matrix BM and color filter layers Cr1, Cr2 formed on the base material 6a, and color filter layers Cr1, Cr2.
- a common electrode 27 is provided so as to cover it.
- the substrate 6a is made of, for example, a transparent glass material or a synthetic resin material, similarly to the substrate 5a.
- the color filter layers Cr1 and Cr2 are composed of two different color filters of red (R), green (G), and blue (B).
- the thick portions Sa to Sc provided in the source wiring S in a portion where the light blocking block 30 is not provided. Configured to prevent leakage.
- the insulating film 31 is provided on the base material 5 a, and the thick portion Sb is formed on the insulating film 31.
- the insulating film 32 is provided so as to cover the thick portion Sb, and the pixel electrode 26 is provided on the insulating film 32.
- the wide width portion Sb is provided so that the left end portion thereof is opposed to the end portion 26b of the left pixel electrode 26, and the right end portion thereof is opposed to the end portion 26a of the right pixel electrode 26. Is provided.
- the wide width portion Sb can shield the end portions 26a and 26b of the two adjacent picture element electrodes 26, and can prevent light leakage between the two adjacent picture elements P.
- a light shielding block 30 that shields the end portions 26a and 26b of the two adjacent pixel electrodes 26 is provided on the base material 5a.
- the source wiring S is provided with the wide portions Sa to Sc so as to cover the isolation regions K1 to K3, respectively, and these wide portions Sa to Sc are provided.
- the separation regions K1 to K3 are each shielded from light.
- the light blocking block 30 is provided on the base material 5a so as to face the end portions 26a and 26b of the two adjacent pixel electrodes 26.
- the active matrix substrate 5 that can improve the aperture ratio while preventing light leakage between two adjacent picture elements P is used for the liquid crystal panel (display unit) 2. Therefore, the high-performance liquid crystal display device 1 having the high-definition liquid crystal panel 2 can be easily configured.
- the configuration in which the black matrix BM is provided on the color filter substrate 6 side has been described.
- the light blocking block 30 and the wide portions Sa to Sc of the source wiring S are used. , Light leakage from between two adjacent picture elements P can be prevented. Therefore, in the liquid crystal display device 1 of the present embodiment, the installation of the black matrix BM can be omitted (the same applies to the second embodiment described later).
- FIG. 7 is a diagram for explaining a specific configuration of picture elements on an active matrix substrate according to the second embodiment of the present invention.
- 8A is a plan view showing the configuration of the gate wiring, auxiliary capacitance wiring, and light shielding block shown in FIG. 7, and
- FIG. 8B is a plan view showing the configuration of the source wiring shown in FIG.
- the main difference between the present embodiment and the first embodiment is that the light shielding block is provided on the substrate so that the end thereof is connected to the auxiliary capacitance wiring.
- symbol is attached
- the light shielding block 30 ′ is provided on the base material 5 a so as to be connected to the auxiliary capacitance wiring 29. .
- the end 30a ′ is provided on the base material 5a so as not to be connected to the gate wiring G
- the end 30b ′ is the auxiliary capacitance wiring. 29 is provided on the base material 5 a so as to be connected to 29. That is, in the active matrix substrate 5 of the present embodiment, the isolation region K1 is formed between the end 30a 'and the gate wiring G, as in the first embodiment.
- no separation region K2 is formed on the end 30b 'side.
- the thick portion Sb is not formed in the source wiring S ′. That is, in the active matrix substrate 5 of this embodiment, light leakage from between two adjacent picture elements P can be prevented at the connection portion between the end 30b ′ and the auxiliary capacitance wiring 29.
- the part Sb is not provided in the source line S ′.
- the present embodiment can achieve the same operations and effects as the first embodiment.
- the light shielding block 30 ′ can function as an auxiliary capacitance electrode. Can be used to generate auxiliary capacity. Further, since the light shielding block 30 ′ can function as an auxiliary capacitance electrode as described above, the installation of the auxiliary capacitance electrode 28 can be omitted in the active matrix substrate 5 of the present embodiment.
- the display device of the present invention is anything as long as a display panel including an active matrix substrate is used for a display portion. It is not limited. That is, the display device of the present invention is connected to a plurality of data lines and a plurality of scan lines arranged in a matrix, and a switching element and a switching element provided in the vicinity of the intersection of the data line and the scan line. Any active matrix substrate having picture elements having picture element electrodes may be used.
- the display device of the present invention uses a transflective or reflective liquid crystal panel or an active matrix substrate such as an organic EL (Electronic Luminescence) element, an inorganic EL element, or a field emission display. It can be applied to various display devices.
- a transflective or reflective liquid crystal panel or an active matrix substrate such as an organic EL (Electronic Luminescence) element, an inorganic EL element, or a field emission display. It can be applied to various display devices.
- the light shielding block, the gate wiring (scanning wiring), and the auxiliary capacitance wiring are formed in the same layer and the same material on the base material, and the light shielding block, the scanning wiring, and the auxiliary capacitance are formed.
- the case where the source wiring (data wiring) is provided above the wiring for use has been described.
- the active matrix substrate of the present invention includes a base material provided so that one and the other of the data wiring and the scanning wiring cross each other, and each end of two pixel electrodes adjacent to each other on the base material. There is no limitation as long as a light shielding block for shielding light is provided.
- a scanning wiring is provided above the data wiring, or an auxiliary capacitance wiring is provided in a layer different from the light shielding block and the scanning wiring, and the auxiliary capacitance wiring is arranged at substantially the center of two adjacent scanning wirings.
- a configuration may be employed in which wiring is performed so as to pass through the section.
- the light shielding block may be formed using an organic compound such as a synthetic resin, and the light shielding block configured in a straight line may be provided in a different layer from the scanning wiring and the auxiliary capacitor wiring.
- the light blocking block is more easily formed when the light blocking block is formed of the same material and the same layer as the scanning wiring and the auxiliary capacitor wiring on the base material.
- This is preferable because the manufacturing process of the active matrix substrate can be simplified. That is, when the scanning wiring and / or the auxiliary capacitance wiring and the light shielding block are formed in different layers, it is necessary to prepare a plurality of masks. As a result, the number of masks required for the manufacturing process of the active matrix substrate is increased, and the manufacturing process cannot be simplified.
- the unconnected separation region between the gate wiring (scanning wiring) and the end portion of the light shielding block and the auxiliary capacitance wiring and the end portion of the light shielding block are not connected.
- the display device of the present invention is not limited to this.
- a configuration in which the width is partially increased so as to cover each of the above-described separation regions may be employed.
- the present invention is useful for an active matrix substrate capable of improving the aperture ratio while preventing light leakage between two adjacent picture elements, and a high-performance display device using the active matrix substrate.
- Liquid crystal display device 2 Liquid crystal panel (display unit) 5 Active matrix substrate 5a Base material 25 Thin film transistor (switching element) 26 picture element electrode 26a, 26b end 29 auxiliary capacitance wiring 30, 30 ′ light-shielding block 30a, 30b, 30a ′, 30b ′ end S1-SM, S, S ′ source wiring (data wiring) G1 to GN, G Gate wiring (scanning wiring) P picture element K1, K2, K3 separation area
Abstract
Description
前記データ配線及び前記走査配線の一方及び他方が互いに交差するように設けられた基材を備え、
前記基材上には、隣接する2つの前記絵素電極の各端部を遮光する遮光ブロックが設けられていることを特徴とするものである。
前記遮光ブロックでは、その端部が前記走査配線に対し接続されないように、前記基材上に設けられてもよい。
前記遮光ブロックは、前記基材上で前記補助容量用配線と同一層で、かつ、同一材料によって形成されるとともに、
前記遮光ブロックでは、その端部が前記補助容量用配線に対し接続されないように、前記基材上に設けられてもよい。
前記遮光ブロックは、前記基材上で前記走査配線及び前記補助容量用配線と同一層で、かつ、同一材料によって形成されるとともに、
前記遮光ブロックでは、その端部が前記走査配線及び前記補助容量用配線に対し接続されないように、前記基材上に設けられていることが好ましい。
前記遮光ブロックは、前記基材上で前記補助容量用配線と同一層で、かつ、同一材料によって形成されるとともに、
前記遮光ブロックでは、その端部が前記補助容量用配線に対し接続されるように、前記基材上に設けられてもよい。
前記表示部には、上記いずれかに記載のアクティブマトリクス基板が用いられていることを特徴とするものである。
図1は、本発明の第1の実施形態にかかる液晶表示装置を説明する概略断面図である。図において、本実施形態の液晶表示装置1には、図の上側が視認側(表示面側)として設置される表示部としての液晶パネル2と、液晶パネル2の非表示面側(図の下側)に配置されて、当該液晶パネル2を照明する照明光を発生する照明装置3とが設けられている。
図7は、本発明の第2の実施形態にかかるアクティブマトリクス基板での絵素の具体的な構成を説明する図である。図8Aは図7に示したゲート配線、補助容量用配線、及び遮光ブロックの構成を示す平面図であり、図8Bは図7に示したソース配線の構成を示す平面図である。図において、本実施形態と上記第1の実施形態との主な相違点は、遮光ブロックにおいて、その端部が補助容量用配線に対し接続されるように、基材上に設けた点である。なお、上記第1の実施形態と共通する要素については、同じ符号を付して、その重複した説明を省略する。
2 液晶パネル(表示部)
5 アクティブマトリクス基板
5a 基材
25 薄膜トランジスタ(スイッチング素子)
26 絵素電極
26a、26b 端部
29 補助容量用配線
30、30’ 遮光ブロック
30a、30b、30a’、30b’ 端部
S1~SM、S、S’ ソース配線(データ配線)
G1~GN、G ゲート配線(走査配線)
P 絵素
K1、K2、K3 分離領域
Claims (10)
- マトリクス状に配列された複数のデータ配線及び複数の走査配線と、前記データ配線と前記走査配線との交差部の近傍に設けられたスイッチング素子及び前記スイッチング素子に接続された絵素電極を有する絵素とを備え、表示パネルの基板として用いられるアクティブマトリクス基板であって、
前記データ配線及び前記走査配線の一方及び他方が互いに交差するように設けられた基材を備え、
前記基材上には、隣接する2つの前記絵素電極の各端部を遮光する遮光ブロックが設けられている、
ことを特徴とするアクティブマトリクス基板。 - 前記遮光ブロックは、前記基材上で前記走査配線と同一層で、かつ、同一材料によって形成されるとともに、
前記遮光ブロックでは、その端部が前記走査配線に対し接続されないように、前記基材上に設けられている請求項1に記載のアクティブマトリクス基板。 - 前記データ配線では、前記走査配線と前記遮光ブロックの端部との間の接続されていない分離領域を覆うように、配線幅が太くされている請求項2に記載のアクティブマトリクス基板。
- 補助容量を発生させるための補助容量用配線を備え、
前記遮光ブロックは、前記基材上で前記補助容量用配線と同一層で、かつ、同一材料によって形成されるとともに、
前記遮光ブロックでは、その端部が前記補助容量用配線に対し接続されないように、前記基材上に設けられている請求項1に記載のアクティブマトリクス基板。 - 前記データ配線では、前記補助容量用配線と前記遮光ブロックの端部との間の接続されていない分離領域を覆うように、配線幅が太くされている請求項4に記載のアクティブマトリクス基板。
- 補助容量を発生させるための補助容量用配線を備え、
前記遮光ブロックは、前記基材上で前記走査配線及び前記補助容量用配線と同一層で、かつ、同一材料によって形成されるとともに、
前記遮光ブロックでは、その端部が前記走査配線及び前記補助容量用配線に対し接続されないように、前記基材上に設けられている請求項1に記載のアクティブマトリクス基板。 - 前記データ配線では、前記走査配線と前記遮光ブロックの端部との間の接続されていない分離領域及び前記補助容量用配線と前記遮光ブロックの端部との間の接続されていない分離領域を覆うように、配線幅が太くされている請求項6に記載のアクティブマトリクス基板。
- 補助容量を発生させるための補助容量用配線を備え、
前記遮光ブロックは、前記基材上で前記補助容量用配線と同一層で、かつ、同一材料によって形成されるとともに、
前記遮光ブロックでは、その端部が前記補助容量用配線に対し接続されるように、前記基材上に設けられている請求項1に記載のアクティブマトリクス基板。 - 前記遮光ブロックは、前記隣接する2つの絵素電極の各端部に対向するように、前記基材上に設けられている請求項1~8のいずれか1項に記載のアクティブマトリクス基板。
- 表示部を備えた表示装置であって、
前記表示部には、請求項1~9のいずれか1項に記載のアクティブマトリクス基板が用いられていることを特徴とする表示装置。
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US13/147,808 US20110304809A1 (en) | 2009-03-18 | 2009-11-13 | Active matrix substrate and display device |
CN2009801565622A CN102317994A (zh) | 2009-03-18 | 2009-11-13 | 有源矩阵基板和显示装置 |
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JP2009066009 | 2009-03-18 | ||
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JP2017068119A (ja) * | 2015-09-30 | 2017-04-06 | パナソニック液晶ディスプレイ株式会社 | 表示装置 |
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US9291859B2 (en) * | 2012-06-20 | 2016-03-22 | Samsung Display Co., Ltd. | Liquid crystal display |
CN106371256A (zh) * | 2016-11-30 | 2017-02-01 | 京东方科技集团股份有限公司 | 像素结构、显示面板及显示装置 |
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JPH06265846A (ja) * | 1993-03-10 | 1994-09-22 | Hitachi Ltd | アクティブマトリクス型液晶表示装置及びその駆動方法 |
JP2007279753A (ja) * | 2007-04-24 | 2007-10-25 | Semiconductor Energy Lab Co Ltd | アクティブマトリクス型表示装置の作製方法 |
JP2008186019A (ja) * | 2007-01-30 | 2008-08-14 | Samsung Electronics Co Ltd | アレイ基板及びそれを用いた表示装置 |
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JP3297591B2 (ja) * | 1996-04-17 | 2002-07-02 | シャープ株式会社 | アクティブマトリクス基板の製造方法並びに液晶表示装置 |
JP2000250436A (ja) * | 1999-02-26 | 2000-09-14 | Nec Corp | 薄膜トランジスタアレイ及びその製造方法 |
JP3503685B2 (ja) * | 1999-08-30 | 2004-03-08 | 日本電気株式会社 | 液晶表示装置及びその製造方法 |
-
2009
- 2009-11-13 US US13/147,808 patent/US20110304809A1/en not_active Abandoned
- 2009-11-13 CN CN2009801565622A patent/CN102317994A/zh active Pending
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Patent Citations (3)
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JPH06265846A (ja) * | 1993-03-10 | 1994-09-22 | Hitachi Ltd | アクティブマトリクス型液晶表示装置及びその駆動方法 |
JP2008186019A (ja) * | 2007-01-30 | 2008-08-14 | Samsung Electronics Co Ltd | アレイ基板及びそれを用いた表示装置 |
JP2007279753A (ja) * | 2007-04-24 | 2007-10-25 | Semiconductor Energy Lab Co Ltd | アクティブマトリクス型表示装置の作製方法 |
Cited By (1)
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JP2017068119A (ja) * | 2015-09-30 | 2017-04-06 | パナソニック液晶ディスプレイ株式会社 | 表示装置 |
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US20110304809A1 (en) | 2011-12-15 |
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