WO2016080541A1 - アクティブマトリクス基板及び表示パネル - Google Patents
アクティブマトリクス基板及び表示パネル Download PDFInfo
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- WO2016080541A1 WO2016080541A1 PCT/JP2015/082781 JP2015082781W WO2016080541A1 WO 2016080541 A1 WO2016080541 A1 WO 2016080541A1 JP 2015082781 W JP2015082781 W JP 2015082781W WO 2016080541 A1 WO2016080541 A1 WO 2016080541A1
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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
- 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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- G02F1/00—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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- 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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- G02F1/13—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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- G02F1/00—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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- G02F1/13—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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- G02F1/00—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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- 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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- 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
- G09G3/3685—Details of drivers for data electrodes
Definitions
- the present invention relates to an active matrix substrate and a display panel.
- An active matrix substrate having a plurality of data lines and a plurality of wirings that intersect with the plurality of data lines and include at least a plurality of gate lines is known.
- Patent Document 1 at least a part of switching elements among a plurality of switching elements that are components of a drive circuit that is connected to at least a part of a plurality of wirings and controls the potential of the wirings are arranged in a display region.
- An active matrix substrate is disclosed.
- the active matrix substrate includes a plurality of pixel control elements (pixel TFTs) provided for each of a plurality of pixels constituting the display region, connected to the data lines and the gate lines, and controlling display of the corresponding pixels. Yes.
- pixel TFTs pixel control elements
- all the pixel control elements are arranged in the same direction with respect to the data lines extending in the vertical direction in plan view. For this reason, the interval between adjacent pixel control elements is the same.
- a switching element is arranged between adjacent data lines and between adjacent pixel control elements, a large switching element cannot be arranged because this area is narrow.
- An object of the present invention is to provide an active matrix substrate in which a large switching element can be arranged in a display area.
- An active matrix substrate includes a plurality of data lines, a plurality of wirings crossing the plurality of data lines and including at least a plurality of gate lines, and a plurality of switching elements.
- a drive circuit that is connected to at least a part of the wiring and controls the potential of the wiring in accordance with a control signal supplied from the outside of the display area, and is provided for each of the plurality of pixels that form the display area, and the data
- a plurality of vertical lines extending in the horizontal direction, and the other is a plurality of horizontal lines extending in the horizontal direction in plan view, and the pixels connected to the same horizontal line among the plurality of pixel control elements
- a part of the control element has an arrangement direction with respect to the connected vertical line different from an arrangement direction of other pixel control elements connected to the same horizontal line, and at least one
- a large switching element can be arranged in the display region as a plurality of switching elements that are components of a drive circuit that controls the potentials of a plurality of wirings including a plurality of gate lines.
- FIG. 1 is a schematic diagram illustrating a schematic configuration of the liquid crystal display device according to the first embodiment.
- FIG. 2 is a schematic diagram showing a schematic configuration of the active matrix substrate.
- FIG. 3 is a schematic diagram showing a schematic configuration of an active matrix substrate in which the source lines are not shown, and each part connected to the active matrix substrate.
- FIG. 4 is a diagram illustrating an example of an equivalent circuit of a gate driver for driving the gate line of GL (n).
- FIG. 5 is a timing chart when the gate driver scans the gate line.
- FIG. 6 is a schematic diagram for explaining the configuration of the active matrix substrate in the first embodiment.
- FIG. 1 is a schematic diagram illustrating a schematic configuration of the liquid crystal display device according to the first embodiment.
- FIG. 2 is a schematic diagram showing a schematic configuration of the active matrix substrate.
- FIG. 3 is a schematic diagram showing a schematic configuration of an active matrix substrate in which the source lines are not shown, and each part connected to the active matrix substrate.
- FIG. 8A is a diagram showing a configuration of a conventional active matrix substrate.
- FIG. 8B is a diagram illustrating a configuration of the active matrix substrate in the first embodiment.
- FIG. 9A is a diagram showing a configuration of a conventional active matrix substrate for explaining the length of the internal node.
- FIG. 9B is a diagram showing the configuration of the active matrix substrate in the first embodiment for explaining the length of the internal node.
- FIG. 10A is a diagram for comparing and explaining the number of intersections between internal nodes or driver wirings and source lines or gate lines, and is a diagram showing a configuration of a conventional active matrix substrate.
- FIG. 10B is a diagram for comparing and explaining the number of intersections between the internal node or driver wiring and the source line or gate line, and is a diagram illustrating the configuration of the active matrix substrate in the first embodiment.
- FIG. 11A is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 8A.
- FIG. 11B is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG.
- FIG. 11C is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 8A.
- FIG. 11D is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 8A.
- FIG. 12 is an enlarged view of a part of TFT-C extracted from FIG. 11C.
- FIG. 13A is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the active matrix substrate in the first embodiment.
- FIG. 13B is a diagram showing an example of an equivalent circuit in the case where the gate driver circuit shown in FIG.
- FIG. 13C is a diagram illustrating an example of an equivalent circuit when the circuit of the gate driver illustrated in FIG. 4 is arranged in the display region of the active matrix substrate in the first embodiment.
- FIG. 14 is an enlarged view of the TFT-C extracted from FIGS. 13A to 13B.
- FIG. 15A is a diagram schematically showing a gate driver arrangement region and a gate driver non-arrangement region in a conventional active matrix substrate.
- FIG. 15B is a diagram schematically illustrating the arrangement region of the gate driver and the non-arrangement region of the gate driver in the active matrix substrate of the first embodiment.
- FIG. 16A is a diagram showing a configuration of an active matrix substrate in the second embodiment.
- FIG. 16B is a diagram showing a configuration of a conventional active matrix substrate in a configuration in which a gate line is wired for each color and a source line is wired for each pixel.
- FIG. 17A is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 16B.
- FIG. 17B is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 16B.
- FIG. 17C is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 16B.
- FIG. 17A is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 16B.
- FIG. 17B is a diagram
- FIG. 17D is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 16B.
- FIG. 18 shows a part of TFT-C extracted from FIG. 17C.
- FIG. 19A is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the active matrix substrate of the second embodiment.
- FIG. 19B is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the active matrix substrate of the second embodiment.
- FIG. 19C is a diagram illustrating an example of an equivalent circuit when the circuit of the gate driver illustrated in FIG.
- FIG. 20 is a diagram in which some TFT-Cs are extracted from FIGS. 19A to 19B.
- FIG. 21 is a diagram showing a configuration of an active matrix substrate in the third embodiment.
- FIG. 22 is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG. 4 is arranged in the display area of the active matrix substrate of the third embodiment.
- FIG. 23 is an enlarged view of a part of TFT-C extracted from FIG.
- FIG. 24 is a diagram showing a configuration of an active matrix substrate in the fourth embodiment.
- FIG. 25 is a diagram showing an example of an equivalent circuit when the circuit of the gate driver shown in FIG.
- FIG. 4 is arranged in the display area of the active matrix substrate of the fourth embodiment.
- FIG. 26 is an enlarged view of a part of TFT-C extracted from FIG.
- FIG. 27 is a diagram for explaining the positional shift of the source layer with respect to the gate layer.
- FIG. 28 is a diagram for explaining the influence of the displacement of the source line with respect to the gate line and the displacement of the drain pad with respect to the gate line in the active matrix substrate according to the first embodiment.
- FIG. 29 is a diagram illustrating an example of a cancellation pattern formed in the gate layer.
- FIG. 30 is a diagram illustrating an example of a canceling pattern of the gate layer for canceling a change in the overlapping area between the gate line and the drain pad when the drain pad is displaced in the left-right direction with respect to the gate line.
- FIG. 31 is a diagram illustrating an example of a canceling pattern of the gate layer for canceling the capacitance change between the gate line and the drain pad when the drain pad is displaced in the vertical and horizontal directions with respect to the gate line.
- FIG. 32 is a diagram illustrating an example of a canceling pattern of a gate layer provided corresponding to two pixel TFTs.
- FIG. 33 is a diagram illustrating an example of the offset pattern of the gate layer provided for the non-rectangular drain pad and the shape of the drain pad.
- FIG. 34 is a diagram showing another example of a canceling pattern provided for a non-rectangular drain pad and the shape of the drain pad.
- FIG. 35 is a schematic diagram for explaining the configuration of an active matrix substrate in which adjacent source lines
- An active matrix substrate includes a plurality of data lines, a plurality of wirings crossing the plurality of data lines and including at least a plurality of gate lines, and a plurality of switching elements.
- a drive circuit that is connected to at least a part of the wiring and controls the potential of the wiring in accordance with a control signal supplied from the outside of the display area, and is provided for each of the plurality of pixels that form the display area, and the data
- a plurality of vertical lines extending in the horizontal direction, and the other is a plurality of horizontal lines extending in the horizontal direction in plan view, and the pixels connected to the same horizontal line among the plurality of pixel control elements
- a part of the control element has an arrangement direction with respect to the connected vertical line different from an arrangement direction of other pixel control elements connected to the same horizontal line, and at least one
- the area between adjacent vertical lines is adjacent to each other.
- the distance between the pixel control elements is wider than the distance between other adjacent pixel control elements. Since at least a part of the plurality of switching elements that are components of the drive circuit is disposed in this region, a large switching element can be disposed.
- the arrangement area of the drive circuit can be reduced, so that the wiring length of the internal node of the drive circuit can be shortened.
- the wiring length of the internal node is shortened, the number of intersections between the internal node or driver wiring and the gate line or source line is reduced, so that the yield is improved.
- the parasitic capacitance of the internal node can be reduced, so that power consumption can be reduced.
- the intervals between the plurality of vertical lines are unequal, and at least some of the plurality of switching elements are adjacent to each other in a region between the plurality of vertical lines arranged at unequal intervals.
- the space between the lines is arranged in a region wider than the space between other adjacent vertical lines.
- some of the pixel control elements connected to the same vertical line are other pixels whose arrangement direction with respect to the connected horizontal line is connected to the same vertical line.
- the direction of arrangement of the control elements is different, and at least a part of the plurality of switching elements which are constituent elements of the drive circuit is a region between the adjacent horizontal lines between the adjacent pixel control elements. Is arranged in a region wider than the distance between other adjacent pixel control elements.
- the intervals between the plurality of horizontal lines are unequal, and at least a part of the plurality of switching elements is between adjacent horizontal lines in a region between the plurality of horizontal lines arranged at unequal intervals. Are arranged in a region wider than the interval between other adjacent horizontal lines.
- the region in the vertical direction in plan view among the regions in which the switching elements are disposed can be further increased, so that a larger switching element can be disposed.
- the plurality of vertical lines may be the plurality of data lines, and the plurality of horizontal lines may be the plurality of gate lines.
- the plurality of vertical lines may be the plurality of gate lines, and the plurality of horizontal lines may be the plurality of data lines.
- the drain pad of the pixel control element is formed in a layer different from the gate layer forming the gate line in the stacking direction, and the gate layer is misaligned between the drain pad and the gate layer. In this case, a region is provided for suppressing a change in the overlapping area between the drain pad and the gate layer.
- a display panel includes the active matrix substrate, a counter substrate including a color filter and a counter electrode, and a liquid crystal layer sandwiched between the active matrix substrate and the counter substrate.
- the drive circuit arrangement area of the active matrix substrate can be reduced, so that the drive circuit non-placement area can be increased. Since the non-arrangement region of the drive circuit can be cut, the degree of freedom in making the display panel atypical other than a rectangle can be increased, and the degree of freedom in design of the display panel can be increased.
- FIG. 1 is a schematic diagram showing a schematic configuration of the liquid crystal display device according to the present embodiment.
- the liquid crystal display device 1 includes a display panel 2, a source driver 3, a display control circuit 4, and a power source 5.
- the display panel 2 includes an active matrix substrate 20a, a counter substrate 20b, and a liquid crystal layer (not shown) sandwiched between these substrates.
- polarizing plates are provided on the lower surface side of the active matrix substrate 20a and the upper surface side of the counter substrate 20b.
- a black matrix, three color filters of red (R), green (G), and blue (B) and a common electrode (all not shown) are formed on the counter substrate 20b.
- the active matrix substrate 20a is electrically connected to the source driver 3 formed on the flexible substrate.
- the display control circuit 4 is electrically connected to the display panel 2, the source driver 3, and the power source 5.
- the display control circuit 4 outputs control signals to the source driver 3 and a drive circuit (hereinafter referred to as a gate driver) formed on the active matrix substrate 20a.
- a gate driver a drive circuit
- the control signal includes a reset signal (CLR) for displaying an image on the display panel 2, a clock signal (CKA, CKB), a data signal, and the like.
- the power supply 5 is electrically connected to the display panel 2, the source driver 3, and the display control circuit 4, and supplies a power supply voltage signal to each.
- FIG. 2 is a schematic diagram showing a schematic configuration of the active matrix substrate 20a.
- a plurality of gate lines 13G are formed substantially in parallel from one end to the other end in the X-axis direction.
- a plurality of source lines 15S are formed substantially parallel to the Y-axis direction so as to intersect with the gate line 13G group. That is, the source line 15S is a vertical line extending in the vertical direction in plan view, and the gate line 13G is a horizontal line extending in the horizontal direction in plan view.
- a TFT (hereinafter referred to as a pixel TFT) (pixel control element) for controlling display of a pixel is provided in the vicinity of the intersection of the gate line 13G and the source line 15S.
- Each pixel corresponds to a color filter of one of red (R), green (G), and blue (B) provided on the counter substrate 20b side.
- One display pixel is constituted by three pixels of the adjacent red pixel, green pixel, and blue pixel, and various colors can be displayed.
- FIG. 3 is a schematic diagram showing a schematic configuration of each part connected to the active matrix substrate 20a and the active matrix substrate 20a in which the source line 15S is not shown.
- the gate driver 11 (drive circuit) is formed between the gate line 13G and the gate line 13G in the display region.
- each of the plurality of gate lines 13 ⁇ / b> G is connected to one gate driver 11, but may be connected to a plurality of gate drivers 11.
- a terminal area 12g (second terminal area) is formed in the frame area on the side where the source driver 3 is provided.
- the terminal portion 12g is connected to the display control circuit 4 and the power source 5.
- the terminal unit 12g receives signals such as control signals (CKA, CKB) and power supply voltage signals output from the display control circuit 4 and the power supply 5. Signals such as control signals (CKA, CKB) and power supply voltage signals input to the terminal portion 12g are supplied to each gate driver 11 via the driver wiring 15L1.
- the gate driver 11 In response to the supplied signal, the gate driver 11 outputs a voltage signal indicating one of the selected state and the non-selected state to the connected gate line 13G, and supplies the voltage signal to the next-stage gate line 13G. Is output.
- a voltage signal corresponding to each of a selected state and a non-selected state may be referred to as a scanning signal.
- the state in which the gate line 13G is selected is referred to as driving of the gate line 13G.
- a terminal portion 12s (first terminal portion) for connecting the source driver 3 and the source line 15S is formed in a frame region on the side where the source driver 3 is provided.
- the source driver 3 outputs a data signal to each source line 15S in accordance with a control signal input from the display control circuit 4.
- FIG. 4 is a diagram illustrating an example of an equivalent circuit of the gate driver 11 for driving the gate line 13G of GL (n).
- the gate driver 11 includes TFT-A to TFT-E configured as thin film transistors (TFTs) as switching elements, a capacitor Cbst, terminals 111 to 117, and a low-level power source. And a terminal group to which a voltage signal is input.
- TFTs thin film transistors
- the terminal 111 receives the set signal (S) via the GL (n-1) gate line 13G of the preceding stage.
- the terminal 111 of the gate driver 11 connected to the gate line 13G of GL (1) receives the gate start pulse signal (S) output from the display control circuit 4.
- the terminals 113 and 116 receive a reset signal (CLR) output from the display control circuit 4.
- the terminal 114 receives an input clock signal (CKA).
- the terminals 112 and 115 receive an input clock signal (CKB).
- the terminal 117 outputs the set signal (S) to the subsequent gate line 13G.
- the clock signal (CKA) and the clock signal (CKB) are two-phase clock signals whose phases are inverted every horizontal scanning period (see FIG. 5).
- netA a wiring connecting the source terminal of the TFT-A, the drain terminal of the TFT-B, one electrode of the capacitor Cbst, and the gate terminal of the TFT-C.
- the gate terminal of the TFT-A is connected to the terminal 112, the drain terminal is connected to the terminal 111, and the source terminal is connected to netA (n).
- the gate terminal of the TFT-B is connected to the terminal 113, the drain terminal is connected to netA (n), and the source terminal is connected to the power supply voltage terminal VSS.
- the gate terminal of TFT-C is connected to netA (n), the drain terminal is connected to terminal 114, and the source terminal is connected to output terminal 117.
- the capacitor Cbst has one electrode connected to the netA (n) and the other electrode connected to the terminal 117.
- the gate terminal of the TFT-D is connected to the terminal 115, the drain terminal is connected to the terminal 117, and the source terminal is connected to the power supply voltage terminal VSS.
- the gate terminal of the TFT-E is connected to the terminal 116, the drain terminal is connected to the terminal 117, and the source terminal is connected to the power supply voltage terminal VSS.
- FIG. 5 is a timing chart when the gate driver 11 scans the gate line 13G.
- a period from t3 to t4 is a period in which the GL (n) gate line is selected.
- a clock signal (CKA) and a clock signal (CKB) that are supplied from the display control circuit 4 and whose phases are inverted every horizontal scanning period are input to the gate driver 11 via the terminals 112, 114, and 115.
- a reset signal (CLR) that is at a H (High) level for a certain period every vertical scanning period is input from the display control circuit 4 to the gate driver 11 via the terminals 113 and 116.
- the reset signal (CLR) is input, the netA (n) and the gate line 13G transition to the L (Low) level.
- the L level clock signal (CKA) is input to the terminal 114, and the H level clock signal (CKB) is input to the terminals 112 and 115.
- TFT-A and TFT-D are turned on, netA (n) is charged to the L level power supply voltage (VSS), TFT-C is turned off, and the L level potential is output from the terminal 117. .
- the clock signal (CKA) becomes L level and the clock signal (CKB) becomes H level, and the set signal (S) is input to the terminal 111 through the gate line of GL (n ⁇ 1).
- TFT-A is turned on, and netA (n) is charged to a potential obtained by subtracting the threshold voltage of TFT-A from the H level.
- TFT-D since the TFT-D is in an on state, an L level potential is output from the terminal 117.
- the TFT-C is turned on and the TFT-D is turned off.
- the potential of the terminal 117 starts to be charged to the H level.
- netA (n) is charged to a higher potential via the capacitor Cbst.
- the netA (n) potential is designed to be higher than the potential obtained by adding the threshold voltage of the TFT-C to the H level.
- the TFT-C is kept on, so that the gate line 13G of GL (n) connected to the terminal 117 is charged to the H level and is in the selected state.
- the gate line 13G is selected.
- the liquid crystal display device 1 sequentially scans the gate lines 13G by the gate drivers 11 connected to the respective gate lines 13G, and supplies data signals to the respective source lines 15S by the source driver 3, whereby an image is displayed on the display panel 2. indicate. *
- TFT-A to TFT- constituting the gate driver 11 A wide region cannot be secured as a region for arranging TFTs such as E (hereinafter referred to as driver TFTs). Accordingly, in the present embodiment, among the plurality of pixel TFTs connected to the same gate line 13G (horizontal line), some of the pixel TFTs are connected to the source line 15S (vertical line) connected to the pixel TFT. In contrast, they are arranged in different directions on the left and right.
- the intervals between the adjacent gate lines 13G are equal, but the intervals between the adjacent source lines 15S are not equal but are not equal.
- the interval between the two source lines 15S located on both sides of the position where the driver TFT is arranged is the widest.
- the pixel TFT connected to the source line 15S located on the left side of the position where the driver TFT is arranged is arranged on the right side with respect to the connected source line 15S.
- the pixel TFT connected to the source line 15S located on the right side of the position where the driver TFT is arranged is arranged on the left side with respect to the connected source line 15S.
- FIG. 6 is a schematic diagram for explaining the configuration of the active matrix substrate 20a in the present embodiment.
- the spacing between the source line 15S1 and the source line 15S2, the spacing between the source line 15S2 and the source line 15S3, and the spacing between the source line 15S3 and the source line 15S4 are different. Specifically, the interval between the source line 15S2 and the source line 15S3 is wider than the interval between the source line 15S1 and the source line 15S2 and the interval between the source line 15S3 and the source line 15S4, and at least one pixel or more. is seperated. In FIG. 6, the pixel electrode 17 of each pixel is also shown.
- the pixel TFT 16T1 connected to the source line 15S1 and the pixel TFT 16T2 connected to the source line 15S2 are connected to each other.
- the pixel TFT 16T3 connected to the source line 15S is arranged on the left side with respect to the connected source line 15S.
- the driver TFT 18 is disposed between the source line 15S2 and the source line 15S3 having a wide interval in the region between the two adjacent source lines 15S.
- the intervals between adjacent source lines 15S are not equal, but the arrangement direction of a plurality of pixel TFTs connected to the same gate line 13G is relative to the source line 15S connected to each pixel TFT.
- 2 is a diagram showing a comparative configuration example in the same direction. That is, all the pixel TFTs 16T are arranged on the right side with respect to the connected source line 15S.
- the interval between the source line 15S2 and the source line 15S3 is the interval between the source line 15S1 and the source line 15S2, and Wider than the interval between.
- the driver TFT 18 can be disposed between the source line 15S2 and the source line 15S3 having a wide interval.
- the driver wiring 15L1, and the source line 15S3 are arranged on the pixel region (opening region), the aperture ratio decreases.
- some of the pixel TFTs among the plurality of pixel TFTs connected to the same gate line 13G are connected to the connected source line 15S. Since they are arranged in different directions, the source line 15S2 and the driver wiring 15L1 can be arranged in the light shielding region between the pixels, and the aperture ratio can be increased as compared with the configuration shown in FIG.
- FIG. 8A and 8B show the arrangement direction of a plurality of pixel TFTs in which the configuration of the active matrix substrate 20a in this embodiment is substantially the same as the interval between adjacent source lines and connected to the same gate line 13G. It is a figure for comparing and explaining the structure of the conventional active matrix substrate which is the same.
- FIG. 8A shows a configuration of a conventional active matrix substrate
- FIG. 8B shows a configuration of an active matrix substrate 20a in the present embodiment.
- a region BM indicated by a two-dot chain line is a light shielding region BM shielded by a black matrix (not shown) formed on the counter substrate 20b.
- a plurality of source lines 15S are arranged at equal intervals in the BM region.
- a driver wiring 15L1 connected to the driver TFT 18 is disposed in the pixel region (opening region) at a position where the driver TFT 18 is disposed.
- dummy wirings (not shown) for adjusting the aperture ratio corresponding to the arrangement positions of the driver wirings 15L1 are arranged in the pixel region at positions where the driver TFTs 18 are not arranged.
- the driver wiring 15L1 is arranged in the BM region.
- the source lines 15S1 and 15S2 are arranged in the BM region, and the source line 15S3 is arranged in the pixel region.
- the arrangement position of the source line 15S in one display pixel is the same regardless of the presence / absence of the arrangement of the driver TFT 18, so that no dummy wiring for adjusting the aperture ratio is necessary.
- FIG. 9A and 9B are diagrams for comparing and explaining the length of the internal node of the active matrix substrate 20a in this embodiment and the length of the internal node of the conventional active matrix substrate.
- FIG. 9A shows a configuration of a conventional active matrix substrate
- FIG. 9B shows a configuration of an active matrix substrate 20a in the present embodiment.
- the internal node is a wiring corresponding to netA shown in FIG.
- the plurality of source lines 15S are arranged at equal intervals, and the arrangement direction of the plurality of pixel TFTs connected to the same gate line 13G is the same. Therefore, the area where the driver TFT 18 is arranged is narrow, and only a small driver TFT 18 can be arranged. For this reason, it is necessary to arrange small driver TFTs 18 at a plurality of locations, and the internal node of the gate driver 11 becomes long.
- the internal node of the gate driver 11 has a length over 5 display pixels. Further, the longer internal node increases the parasitic capacitance of the internal node and increases the power consumption.
- the arrangement area of the driver TFT 18 is wider than that of the conventional active matrix substrate.
- region of the gate driver 11 whole can be made small.
- the internal node of the gate driver 11 can be shortened.
- the conventional active matrix substrate shown in FIG. 9A three small driver TFTs 18 need to be arranged, whereas in the active matrix substrate 20a of this embodiment shown in FIG. Only two large driver TFTs 18 need be arranged.
- the internal node of the driver 11 has a length extending over three display pixels. By shortening the internal node, the parasitic capacitance of the internal node is reduced and the power consumption is reduced.
- FIG. 10A and 10B compare the number of intersections between the active matrix substrate 20a in the present embodiment, the internal node (netA) or driver wiring 15L1 of the conventional active matrix substrate, and the source line 15S or the gate line 13G. It is a figure for doing.
- FIG. 10A shows a configuration of a conventional active matrix substrate
- FIG. 10B shows a configuration of an active matrix substrate 20a in the present embodiment.
- the intersection of the internal node (netA) or the driver wiring 15L1 and the source line 15S or the gate line 13G is surrounded by a dotted line.
- the internal node of the gate driver 11 since the internal node of the gate driver 11 becomes long, the number of connection points between the internal node (netA) in the X-axis direction and the source line 15S in the Y-axis direction increases. Further, since it is necessary to arrange the small driver TFTs 18 at a plurality of locations, the number of connection locations between the Y-axis direction driver wiring 15L1 and the X-axis direction gate line 13G increases.
- the internal node of the gate driver 11 is shortened. Therefore, as apparent from a comparison between FIG. 10A and FIG. 10B, the number of connection points between the internal node in the X-axis direction and the source line 15S in the Y-axis direction is reduced.
- the number of driver TFTs 18 can be reduced because larger driver TFTs 18 can be arranged as compared with a conventional active matrix substrate. Therefore, it is possible to reduce the number of connection points between the driver wiring in the Y-axis direction and the gate line 13G in the X-axis direction. Thereby, the probability of occurrence of a leak failure at the intersection is lowered, and the yield is improved.
- the driver wiring 15L1 extending in the Y-axis direction and the drain pad of the pixel TFT 16T, which is an element electrically connected to the pixel electrode are compared with the conventional active matrix substrate. The distance gets longer. Thereby, since capacitive coupling between the pixel electrode and the driver wiring 15L1 is reduced, noise propagation from the driver wiring with respect to the pixel potential can be reduced, and the image quality can be improved.
- FIGS. 11A to 11D are diagrams showing an example of an equivalent circuit when the circuit of the gate driver 11 shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 8A. Due to the size of the drawing to be drawn, one circuit diagram is divided into four drawings of FIGS. 11A to 11D.
- the source line 15S shown at the right end of FIG. 11A is the same as the source line 15S shown at the left end of FIG. 11B.
- the source line 15S shown at the right end of FIG. 11B is the same as the source line 15S shown at the left end of FIG. 11C.
- the source line 15S shown at the right end of FIG. 11C is the same as the source line 15S shown at the left end of FIG. 11D.
- FIG. 12 is an enlarged view of a part of TFT-C (driver TFT 18) extracted from FIG. 11C.
- FIGS. 13A to 13C are diagrams showing an example of an equivalent circuit when the circuit of the gate driver 11 shown in FIG. 4 is arranged in the display area of the active matrix substrate 20a in the present embodiment. Due to the size of the drawing to be drawn, one circuit diagram is divided into three drawings of FIGS. 13A to 13C. For example, the source line 15S shown at the right end of FIG. 13A is the same as the source line 15S shown at the left end of FIG. 13B. Further, the source line 15S shown at the right end of FIG. 13B is the same as the source line 15S shown at the left end of FIG. 13C.
- FIG. 14 is an enlarged view of the TFT-C (driver TFT 18) extracted from FIGS. 13A to 13B.
- a driver TFT 18 larger than that in the conventional active matrix substrate can be arranged.
- a TFT-C (driver TFT 18) having a length in the Y-axis direction of 6 ⁇ m and a length in the X-axis direction of 18 ⁇ m can be arranged.
- the arrangement area of the gate driver 11 can be reduced as compared with the conventional active matrix substrate.
- FIG. 15A is a diagram schematically showing the arrangement area 151 of the gate driver 11 and the non-arrangement area 152 of the gate driver 11 in the conventional active matrix substrate.
- FIG. 15B is a diagram schematically illustrating the arrangement area 151 of the gate driver 11 and the non-arrangement area 152 of the gate driver 11 in the active matrix substrate 20a of the present embodiment.
- the arrangement region 151 of the gate driver 11 is made smaller than that of the conventional active matrix substrate. Can do. Thereby, the non-arrangement region 152 of the gate driver 11 can be enlarged (see FIGS. 15A and 15B).
- the gate driver non-arrangement region 152 in which the gate driver 11 is not arranged can be cut.
- FIG. 15A and FIG. 15B an example of the area
- the cutting region 152a can also be made larger. Thereby, the freedom degree at the time of making the display panel 2 into a shape other than a rectangle becomes high, and the freedom degree of the design of the liquid crystal display device 1 can be increased.
- the source line 15S is wired for each color
- the gate line 13G is wired for each pixel.
- the gate line 13G is wired for each color
- the source line 15S is wired for each pixel. That is, the gate line 13G is a vertical line extending in the vertical direction in plan view, and the source line 15S is a horizontal line extending in the horizontal direction in plan view.
- the active matrix substrate 20a in the present embodiment among the plurality of pixel TFTs 16T connected to the same source line 15S, some of the pixel TFTs 16T are arranged in different directions with respect to the connected gate lines 13G. Yes. Further, the interval between the adjacent gate lines 13G is not equal, but is not equal. *
- the interval between the two gate lines 13G located on both sides of the position where the driver TFT 18 is disposed is the widest and one pixel or more apart.
- the pixel TFT 16T connected to the gate line 13G located on the left side of the position where the driver TFT 18 is arranged is arranged on the right side with respect to the connected gate line 13G, and the position where the driver TFT 18 is arranged.
- the pixel TFT 16T connected to the gate line 13G located on the right side is arranged on the left side with respect to the connected gate line 13G.
- FIG. 16A is a diagram showing a configuration of the active matrix substrate 20a in the second embodiment.
- the distance between the gate line 13G4 and the gate line 13G5, the distance between the gate line 13G5 and the gate line 13G6, and the distance between the gate line 13G6 and the gate line 13G7 are different.
- the interval between the gate line 13G5 and the gate line 13G6 is wider than the interval between the gate line 13G4 and the gate line 13G5 and the interval between the gate line 13G6 and the gate line 13G7, and is separated by one pixel or more. ing.
- the pixel TFT 16T14 connected to the gate line 13G4 and the pixel TFT 16T15 connected to the gate line 13G5 are connected to each other.
- the gate line 13G is arranged on the right side.
- the pixel TFT 16T16 connected to the gate line 13G6 is arranged on the left side with respect to the connected gate line 13G.
- the driver TFT 18 is disposed between the gate line 13G5 and the gate line 13G6 having a wide interval.
- the driver wiring 15L1 that is electrically connected to the driver TFT 18 is disposed in the light shielding region BM between adjacent pixels.
- some of the gate lines 13G are arranged in the pixel region.
- the gate lines 13G1, 13G2, 13G4, 13G5, 13G7, 13G8, and 13G10 are arranged in the light shielding region BM between adjacent pixels, but the gate lines 13G3, 13G6, and 13G9 are pixels. Arranged in the area.
- the gate line 13G since the gate line 13G has the same arrangement for each display pixel regardless of the presence or absence of the driver TFT 18, no dummy wiring for adjusting the aperture ratio is necessary.
- FIG. 16B is a diagram showing a configuration of a conventional active matrix substrate in a configuration in which gate lines 13G are wired for each color and source lines 15S are wired for each pixel.
- this conventional active matrix substrate a plurality of gate lines 13G are arranged at equal intervals, and a plurality of pixel TFTs 16T connected to the same source line 15S with respect to the connected gate lines 13G.
- the arrangement direction is the same.
- all the pixel TFTs 16T are arranged on the right side with respect to the gate lines 13G connected thereto.
- the area where the driver TFT 18 is arranged is narrow, and only a small driver TFT 18 can be arranged. For this reason, it is necessary to arrange small driver TFTs 18 at a plurality of locations, and the internal node of the gate driver 11 becomes long. As the internal node becomes longer, the parasitic capacitance of the internal node increases and the power consumption increases.
- some of the pixel TFTs 16T among the plurality of pixel TFTs 16T connected to the same source line 15S with the arrangement intervals of the gate lines 13G being unequal. are arranged in different directions with respect to the connected gate line 13G, thereby widening the arrangement region of the driver TFT 18 in the X-axis direction.
- the driver TFT 18 that is larger than the conventional active matrix substrate can be arranged, and therefore the arrangement area of the entire gate driver 11 can be reduced.
- the internal node of the gate driver 11 can be shortened, the parasitic capacitance of the internal node is reduced and the power consumption is reduced.
- the internal node of the gate driver 11 is shortened, the number of connection points between the internal node in the Y-axis direction and the source line 15S in the X-axis direction is reduced.
- the driver wiring 15L1 extending in the Y-axis direction and the elements (for example, the pixel TFT 16T) electrically connected to the pixel electrode are compared with the conventional active matrix substrate.
- the distance to the drain pad) increases.
- FIGS. 17A to 17D are diagrams showing an example of an equivalent circuit when the circuit of the gate driver 11 shown in FIG. 4 is arranged in the display area of the conventional active matrix substrate shown in FIG. 16B. Due to the size of the drawing to be drawn, one circuit diagram is divided into four drawings of FIGS. 17A to 17D.
- the source line 15S shown at the lower end of FIG. 17A is the same as the source line 15S shown at the upper end of FIG. 17B.
- the source line 15S shown at the lower end of FIG. 17B is the same as the source line 15S shown at the upper end of FIG. 17C.
- the source line 15S shown at the lower end of FIG. 17C is the same as the source line 15S shown at the upper end of FIG. 17D.
- FIG. 18 is an enlarged view of a part of TFT-C (driver TFT 18) extracted from FIG. 17C.
- the size of the area where the driver TFT 18 is arranged is limited.
- the TFT-C (driver TFT 18) cannot be arranged between adjacent pixel TFTs 16T. Long TFT-C cannot be arranged.
- the TFT-C having a maximum length in the Y-axis direction of 6 ⁇ m can be arranged.
- FIGS. 19A to 19C are diagrams showing an example of an equivalent circuit when the circuit of the gate driver 11 shown in FIG. 4 is arranged in the display area of the active matrix substrate 20a of the present embodiment. Because of the size of the drawing to be drawn, one circuit diagram is divided into three drawings of FIGS. 19A to 19C. For example, the source line 15S shown at the lower end of FIG. 19A is the same as the source line 15S shown at the upper end of FIG. 19B. Further, the source line 15S shown at the lower end of FIG. 19B is the same as the source line 15S shown at the upper end of FIG. 19C.
- FIG. 20 is a diagram in which some TFT-Cs (driver TFTs 18) are extracted from FIGS. 19A to 19B.
- a driver TFT 18 larger than that in the conventional active matrix substrate can be arranged.
- the TFT-C having a length in the X-axis direction of 6 ⁇ m is connected to the adjacent pixel TFT 16T. It becomes possible to arrange
- the TFT-C to be arranged has a length L in the X-axis direction of 6 ⁇ m and a length in the Y-axis direction W> 80 ⁇ m
- the length in the X-axis direction is 6 ⁇ m
- one TFT-C is arranged for one display pixel, it is only necessary to arrange over five display pixels. Thereby, the arrangement area of the gate driver 11 can be reduced as compared with the conventional active matrix substrate.
- some of the pixel TFTs 16T among the plurality of pixel TFTs 16T connected to the same gate line 13G are connected to the source line 15S. Were arranged in different directions. Further, the intervals between the adjacent source lines 15S are not equal but not equal.
- the active matrix substrate 20a according to the third embodiment has the characteristics of the configuration of the active matrix substrate 20a according to the first embodiment described above, and further has a plurality of connections connected to the same source line 15S (vertical line).
- the pixel TFTs 16T some of the pixel TFTs 16T are arranged in different directions with respect to the connected gate lines 13G (horizontal lines), and the intervals between the adjacent gate lines 13G are not equal but unequal. It is an interval.
- FIG. 21 is a diagram showing the configuration of the active matrix substrate 20a in the third embodiment.
- the spacing between the source line 15S1 and the source line 15S2, the spacing between the source line 15S2 and the source line 15S3, and the spacing between the source line 15S3 and the source line 15S4 are different. Specifically, the interval between the source line 15S2 and the source line 15S3 is wider than the interval between the source line 15S1 and the source line 15S2 and the interval between the source line 15S3 and the source line 15S4.
- the pixel TFT 16T11 connected to the source line 15S1 and the pixel TFT 16T12 connected to the source line 15S2 are connected.
- the pixel TFT 16T13 connected to the source line 15S3 is disposed on the left side with respect to the connected source line 15S.
- the interval between the gate line 13G1 and the gate line 13G2 is different from the interval between the gate line 13G2 and the gate line 13G3. Specifically, the interval between the gate line 13G2 and the gate line 13G3 is wider than the interval between the gate line 13G1 and the gate line 13G2, and two pixels are separated.
- the pixel TFT 16T11 connected to the gate line 13G1 and the pixel TFT 16T31 connected to the gate line 13G3 are connected.
- the pixel TFT 16T21 connected to the gate line 13G2 and the pixel TFT 16T41 connected to the gate line 13G4 are disposed below the gate line 13G. It is arranged on the upper side.
- the driver TFT 18 is disposed in the light shielding region BM between the adjacent gate lines 13G between the adjacent two gate lines 13G and between the adjacent pixels in the Y-axis direction.
- the pixel is disposed in the light shielding region BM between the gate line 13G2 and the gate line 13G3 and between pixels adjacent in the Y-axis direction.
- driver wiring 15L1 that is electrically connected to the driver TFT 18 and extends in the Y-axis direction is disposed in the light-shielding region BM between adjacent pixels in the X-axis direction.
- driver wirings 15N1, 15N2, and 15N3 that are electrically connected to the driver TFT 18 and extend in the X-axis direction are pixels between the gate line 13G2 and the gate line 13G3 and adjacent in the Y-axis direction, like the driver TFT 18.
- the source lines 15S are arranged in the pixel region.
- the source lines 15S1, 15S2, 15S4, 15S5, 15S7, and 15S8 are arranged in the light shielding region BM between pixels adjacent in the X-axis direction, but the source lines 15S3, 15S6, and 15S9 are Are disposed in the pixel region.
- the source line 15S since the source line 15S has the same arrangement for each display pixel, a dummy wiring for matching the aperture ratio is not necessary.
- the arrangement area of the driver TFT 18 in the X-axis direction can be widened as in the active matrix substrate in the first embodiment.
- a large driver TFT 18 can be arranged.
- the arrangement area of the entire gate driver 11 can be reduced, so that the internal node of the gate driver 11 can be shortened.
- the parasitic capacitance of the internal node is reduced and the power consumption is reduced.
- the internal node of the gate driver 11 is shortened, the number of connection points between the internal node in the X-axis direction and the source line 15S in the Y-axis direction is reduced. Furthermore, since a larger driver TFT 18 can be arranged as compared with a conventional active matrix substrate, the number of driver TFTs 18 can be reduced. Therefore, the number of connection points between the Y-axis direction driver wiring 15L1 and the X-axis direction gate line 13G can be reduced.
- the pixel TFT 17T which is an element electrically connected to the pixel electrode 17, and the driver wiring 15L1 are separated by one pixel in the Y-axis direction, capacitive coupling is reduced. Thereby, noise propagation from the driver wiring with respect to the pixel potential can be reduced, and the image quality can be improved.
- the driver TFT 18 and the driver wiring 15N1 ⁇ are not disposed in the region where the driver TFT 18 is disposed in the region where the driver TFT 18 is disposed. Since only 15N3 is arranged, the driver TFT can be arranged in a wider area than the active matrix substrate in the first embodiment. Therefore, it is easy to dispose an element that requires a large area, such as an electrostatic protection circuit or a capacitance forming portion, in a region where the driver TFT 18 is disposed.
- TFT-C driver TFT 18
- the length L 6 ⁇ m in the Y-axis direction and the length in the X-axis direction
- FIG. 22 is a diagram showing an example of an equivalent circuit when the circuit of the gate driver 11 shown in FIG. 4 is arranged in the display area of the active matrix substrate 20a of the present embodiment.
- FIG. 23 is an enlarged view of a part of TFT-C (driver TFT 18) extracted from FIG.
- the TFT-C to be arranged has a length L in the Y-axis direction of 6 ⁇ m and a length W in the X-axis direction of W> 80 ⁇ m
- the length in the Y-axis direction is 6 ⁇ m. If TFT-Cs with lengths in the X-axis direction of 12 ⁇ m, 44 ⁇ m, 12 ⁇ m, 6 ⁇ m and 6 ⁇ m are arranged, the condition can be satisfied. Therefore, as shown in FIG. 23, the arrangement area of the TFT-C (driver TFT 18) is only required for two display pixels, so that the arrangement area of the gate driver 11 can be reduced as compared with the conventional active matrix substrate. .
- the active matrix substrate 20a according to the fourth embodiment has the characteristics of the configuration of the active matrix substrate 20a according to the second embodiment described above, and further includes a plurality of gates connected to the same gate line 13G (vertical line).
- the pixel TFTs 16T some of the pixel TFTs 16T are arranged in different directions with respect to the connected source lines 15S (horizontal lines), and the intervals between the adjacent source lines 15S are not equal but unequal. It is an interval.
- FIG. 24 is a diagram showing a configuration of the active matrix substrate 20a in the fourth embodiment.
- the distance between the gate lines 13G1 and 13G2, the distance between the gate lines 13G2 and 13G3, and the distance between the gate lines 13G3 and 13G4 are different. Specifically, the interval between the gate line 13G1 and the gate line 13G2 is wider than the interval between the gate line 13G2 and the gate line 13G3 and the interval between the gate line 13G3 and the gate line 13G4, and is separated by one pixel or more. ing. *
- the pixel TFT 16T11 connected to the gate line 13G1 and the pixel TFT 16T13 connected to the gate line 13G3 are connected.
- the pixel TFT 16T12 connected to the gate line 13G2 is arranged on the left side with respect to the connected gate line 13G.
- the interval between the source line 15S1 and the source line 15S2 is different from the interval between the source line 15S2 and the source line 15S3. Specifically, the interval between the source line 15S2 and the source line 15S3 is wider than the interval between the source line 15S1 and the source line 15S2, and two pixels are separated.
- the pixel TFT 16T11 connected to the source line 15S1 and the pixel TFT 16T31 connected to the source line 15S3 are connected.
- the pixel TFT 16T21 connected to the source line 15S2 and the pixel TFT 16T41 connected to the source line 15S4 are arranged on the upper side with respect to the source line 15S. Located on the lower side.
- the driver TFT 18 is disposed between the two source lines 15S adjacent in the Y-axis direction and between the source lines 15S having a wide interval and between the adjacent pixels in the Y-axis direction.
- the pixel is disposed in the light shielding region BM between the source line 15S2 and the source line 15S3 and between pixels adjacent in the Y-axis direction.
- the driver wiring 15L1 that is electrically connected to the driver TFT 18 and extends in the Y-axis direction is disposed in the light-shielding region BM between adjacent pixels in the X-axis direction.
- driver wirings 15N1, 15N2, and 15N3 that are electrically connected to the driver TFT 18 and extend in the X-axis direction are between the source line 15S2 and the source line 15S3 and between the adjacent pixels in the Y-axis direction. It is arranged in BM. That is, all the driver wirings are arranged in the light shielding area BM and are not arranged in the pixel area.
- some of the gate lines 13G are arranged in the pixel region.
- the gate lines 13G1, 13G2, 13G4, 13G5, 13G7, 13G8, and 13G10 are arranged in the light shielding region BM between pixels adjacent in the X-axis direction, but the gate lines 13G3, 13G6, 13G9 is arranged in the pixel region.
- the gate line 13G since the gate line 13G has the same arrangement for each display pixel, a dummy wiring for matching the aperture ratio is not necessary.
- the arrangement area of the driver TFT 18 can be widened, so that it is larger than the conventional active matrix substrate.
- a driver TFT 18 can be disposed.
- the arrangement area of the entire gate driver 11 can be reduced, so that the internal node of the gate driver 11 can be shortened.
- the parasitic capacitance of the internal node is reduced and the power consumption is reduced.
- the internal node of the gate driver 11 is shortened, the number of connection points between the internal node in the Y-axis direction and the source line 15S in the X-axis direction is reduced.
- the distance between the driver wiring 15L1 extending in the Y-axis direction and the drain pad, which is an element electrically connected to the pixel electrode, can be increased. large.
- drain pad which is an element electrically connected to the pixel electrode
- driver wirings 15N1 to 15N3 are separated by one pixel in the Y-axis direction. Therefore, noise propagation from the driver wiring with respect to the pixel potential can be reduced, and the image quality can be improved.
- the driver TFT 18 can be disposed in a wider area than the active matrix substrate in the second embodiment. Therefore, it is easy to dispose an element that requires a large area, such as an electrostatic protection circuit or a capacitance forming portion, in a region where the driver TFT 18 is disposed.
- the size of the region where the driver TFT 18 is disposed is limited.
- FIG. 25 is a diagram showing an example of an equivalent circuit when the circuit of the gate driver 11 shown in FIG. 4 is arranged in the display area of the active matrix substrate 20a of the present embodiment.
- FIG. 26 is an enlarged view of a part of TFT-C (driver TFT 18) extracted from FIG.
- the length in the Y axis direction is 6 ⁇ m. If two TFT-Cs (driver TFTs 18) each having a length in the X-axis direction of 40 ⁇ m are arranged, the condition can be satisfied. Therefore, as shown in FIG. 26, the arrangement area of the TFT-C (driver TFT 18) is only required for two display pixels, so that the arrangement area of the gate driver 11 can be reduced as compared with the conventional active matrix substrate. .
- a gate layer constituting the gate line 13G and a source layer for forming the source line 15S are formed on the glass substrate.
- the gate layer and the source layer are formed in different layers in the stacking direction.
- each layer is displaced in a plane direction orthogonal to the stacking direction, so that the overlapping area of the gate layer and the source layer may be different for each substrate or each place.
- This effect is particularly prominent between the drain pad of the pixel TFT 16T and other elements, and causes a reduction in display quality.
- the capacitance between the drain pad and the gate line 13G increases / decreases due to the position shift, and the pull-in amount when the pixel TFT is turned off increases / decreases.
- FIG. 27 is a diagram for explaining a positional shift of the source layer 272 with respect to the gate layer 271. If the position 272a is shifted to the position 272b with respect to the reference position 272a of the source layer 272, the overlapping area between the gate layer 271 and the source layer 272 is increased and the capacity is increased. And the area of overlap between the source layer 272 and the capacitance decreases.
- FIG. 28 is a diagram for explaining the influence of the displacement of the source line 15S with respect to the gate line 13G and the displacement of the drain pad 28D with respect to the gate line 13G in the active matrix substrate 20a according to the first embodiment. It is.
- the reference position of the source line 15S and the drain pad 28D is indicated by a solid line, and the position when a positional deviation occurs is indicated by a dotted line.
- the active matrix substrate 20a As described above, in the active matrix substrate 20a according to the first embodiment, among the plurality of pixel TFTs 16T connected to the same gate line 13G, some of the pixel TFTs are connected to the connected source line 15S. Are arranged in different directions. In the example shown in FIG. 28, the pixel TFT 16T1 is disposed on the right side of the source line 15S1, and the pixel TFT 16T2 is disposed on the left side of the source line 15S2.
- the gate lines are arranged between the pixel TFTs 16T having different arrangement directions with respect to the connected source line 15S.
- the overlapping area changes between 13G and the drain pad 28D, and the capacitance changes.
- the overlapping area between the gate line 13G and the drain pad 28D1 decreases, the capacitance decreases, and the pull-in amount when the pixel TFT 16T is turned off decreases.
- the overlapping area between the gate line 13G and the drain pad 28D2 increases, the capacitance increases, and the pull-in amount when the pixel TFT 16T is turned off increases.
- a canceling pattern for canceling a change in the overlapping area between the gate layer and the drain pad due to the misalignment is provided. Form on the gate layer.
- FIG. 29 is a diagram illustrating an example of a cancellation pattern 290 formed on the gate line 13G (gate layer). Also in FIG. 29, the reference position of the source line 15S and the drain pad 28D is indicated by a solid line, and the position when a positional shift occurs is indicated by a dotted line.
- the offset pattern 290 has a shape that can suppress a change in the overlapping area between the gate line 13G and the drain pad 28D when a positional deviation occurs between the gate line 13G and the drain pad 28D.
- the drain pad 28D is formed at the reference position, the overlapping region of the gate line 13G and the drain pad 28D when the cancellation pattern 290 is not formed, the cancellation pattern 290 and the drain pad 28D.
- the canceling pattern 290 is formed so that the overlapping region is symmetrical with respect to the center point of the drain pad 28D.
- FIG. 30 shows a gate line 13G (gate layer) for canceling a change in the overlapping area between the gate line 13G and the drain pad 28D when the drain pad 28D is displaced in the left-right direction with respect to the gate line 13G.
- 5 is a diagram illustrating an example of a cancellation pattern 300.
- the overlapping region between the gate line 13G and the drain pad 28D when the canceling pattern 300 is not formed, and the overlapping region between the canceling pattern 300 and the drain pad 28D are drain pads.
- the cancellation pattern 300 is formed so as to be symmetric with respect to a center line that bisects 28D in the X-axis direction.
- FIG. 31 shows the canceling of the gate line 13G (gate layer) for canceling the capacitance change between the gate line 13G and the drain pad 28D when the drain pad 28D is displaced in the vertical and horizontal directions with respect to the gate line 13G.
- FIG. 6 is a diagram illustrating an example of a pattern 310.
- the cancellation pattern 310 is formed so as to be bilaterally symmetric with respect to a center line that bisects 28D in the X-axis direction and is vertically symmetric with respect to a center line that bisects the drain pad 28D in the Y-axis direction.
- the gate layer offset pattern need not be provided for each pixel TFT 16T, and may be formed corresponding to a plurality of pixel TFTs 16T. Examples of gate layer offset patterns provided corresponding to a plurality of pixel TFTs are shown in FIGS.
- FIG. 32 is a diagram showing an example of a canceling pattern 320 of the gate layer provided corresponding to the two pixel TFTs 16T.
- the cancellation pattern 320 is formed so as to be bilaterally symmetric with respect to a center line that bisects 28D in the X-axis direction and is vertically symmetric with respect to a center line that bisects the drain pad 28D in the Y-axis direction.
- the drain pad 28D When the drain pad 28D has a non-rectangular shape, a cancellation pattern is provided on the gate line 13G (gate layer), and the drain pad 28D has a shape that is shifted when the drain pad 28D is misaligned with the gate line 13G.
- the shape is such that the change in the overlapping area between the gate line 13G (gate layer) and the drain pad 28D can be suppressed.
- FIG. 33 is a diagram showing an example of the offset pattern 330 of the gate layer provided for the non-rectangular drain pad 28D and the shape of the drain pad 28D.
- the drain pad 28D is symmetric with respect to a center line that bisects itself in the X-axis direction and has a shape that is vertically symmetric with respect to the center line bisected in the Y-axis direction. Further, when the drain pad 28D is formed at the reference position, an overlapping region between the gate line 13G and the drain pad 28D when the canceling pattern 330 is not formed, and an overlapping region between the canceling pattern 330 and the drain pad 28D are provided.
- the cancellation pattern 330 is formed so as to be bilaterally symmetric with respect to the center line that bisects the drain pad 28D in the X-axis direction, and so as to be vertically symmetric with respect to the center line that bisects the drain pad 28D in the Y-axis direction. .
- FIG. 34 is a diagram showing an example of the offset pattern 340 provided for the non-rectangular drain pad 28D and another shape of the drain pad 28D.
- the drain pad 28D has a shape that can cancel the change in the overlapping area corresponding to each pixel TFT 16T.
- the drain pad 28D overlaps corresponding to a plurality of pixel TFTs. The shape can offset the change in area.
- the present invention is not limited to the above-described embodiment.
- the intervals between the adjacent source lines 15S are set to be non-uniform intervals, but may be equal intervals.
- FIG. 35 is a schematic diagram for explaining the configuration of the active matrix substrate 20a in which the intervals between the adjacent source lines 15S are equal. Adjacent source lines 15S are equally spaced. Among the plurality of pixel TFTs 16T connected to the same gate line 13G, some of the pixel TFTs are arranged in different directions with respect to the connected source line 15S. In the example shown in FIG. 35, the pixel TFT 16T1 connected to the source line 15S1 and the pixel TFT 16T3 connected to the source line 15S3 are arranged on the right side with respect to the connected source line 15S. The pixel TFT 16T2 connected to the source line 15S2 is arranged on the left side with respect to the connected source line 15S.
- the driver TFT 18 is an area between adjacent source lines 15S, and is disposed in an area where the distance between adjacent pixel control elements 16T is wider than the distance between other adjacent pixel control elements 16T. In the example shown in FIG. 35, the driver TFT 18 is disposed between the source line 15S2 and the source line 15S3. Since the pixel TFT 16T2 is disposed on the left side of the source line 15S2 and the pixel TFT 16T3 is disposed on the right side of the source line 15S3, the pixel TFT 16T is not disposed between the source line 15S2 and the source line 15S3. Thereby, a large driver TFT 18 can be arranged between the source line 15S2 and the source line 15S3.
- the intervals between the adjacent gate lines 13G may be equal intervals instead of unequal intervals.
- the intervals between the adjacent source lines 15S may be equal intervals instead of unequal intervals.
- the intervals between the adjacent gate lines 13G may be equal intervals instead of non-uniform intervals.
- driver TFT 18 that is larger than the conventional active matrix substrate can be disposed.
- two or more small driver TFTs may be connected in series.
- driver TFTs 18 that are components of the gate driver 11
- some of the driver TFTs 18 may be arranged in the display area, and the other driver TFTs 18 may be arranged outside the display area.
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Abstract
Description
以下、図面を参照し、本発明の実施の形態を詳しく説明する。図中同一または相当部分には同一符号を付してその説明は繰り返さない。なお、説明を分かりやすくするために、以下で参照する図面においては、構成が簡略化または模式化して示されたり、一部の構成部材が省略されたりしている。また、各図に示された構成部材間の寸法比は、必ずしも実際の寸法比を示すものではない。各図に示された表示画素は短辺40μm程度、長辺120μm程度としているが、説明の便宜上設定した値であり、必ずしも実際の寸法を示すものではなく、実施形態を限定するものではない。
図1は、本実施形態に係る液晶表示装置の概略構成を示した模式図である。液晶表示装置1は、表示パネル2、ソースドライバ3、表示制御回路4、及び電源5を有する。表示パネル2は、アクティブマトリクス基板20aと、対向基板20bと、これら基板に挟持された液晶層(図示略)とを有する。図1において図示を省略しているが、アクティブマトリクス基板20aの下面側と対向基板20bの上面側には、偏光板が設けられている。対向基板20bには、ブラックマトリクスと、赤(R)、緑(G)、青(B)の3色のカラーフィルタと、共通電極(いずれも図示略)が形成されている。
図2は、アクティブマトリクス基板20aの概略構成を示す模式図である。アクティブマトリクス基板20aにおいて、X軸方向の一端から他端まで複数のゲート線13Gが略平行に形成されている。また、アクティブマトリクス基板20aには、ゲート線13G群と交差するように、Y軸方向に複数のソース線15S(データ線)が略平行に形成されている。すなわち、ソース線15Sは、平面視において縦方向に伸びる縦線であり、ゲート線13Gは、平面視において横方向に伸びる横線である。
ここで、本実施形態におけるゲートドライバ11の構成について説明する。図4は、GL(n)のゲート線13Gを駆動するためのゲートドライバ11の等価回路の一例を示す図である。図4に示すように、ゲートドライバ11は、スイッチング素子として薄膜トランジスタ(TFT:Thin Film Transistor)で構成されたTFT-A~TFT-Eと、キャパシタCbstと、端子111~117と、ローレベルの電源電圧信号が入力される端子群とを有する。
次に、図4及び図5を参照しつつ、ゲートドライバ11の動作について説明する。図5は、ゲートドライバ11がゲート線13Gを走査する際のタイミングチャートである。図5において、t3からt4の期間がGL(n)のゲート線が選択されている期間である。表示制御回路4から供給される、一水平走査期間毎に位相が反転するクロック信号(CKA)とクロック信号(CKB)とが端子112、114、115を介してゲートドライバ11に入力される。また、図5では省略しているが、一垂直走査期間毎に一定期間H(High)レベルとなるリセット信号(CLR)が表示制御回路4から端子113、116を介してゲートドライバ11に入力される。リセット信号(CLR)が入力されると、netA(n)、ゲート線13GはL(Low)レベルに遷移する。
第1の実施形態におけるアクティブマトリクス基板20aでは、ソース線15Sを各色ごとに配線し、ゲート線13Gを各画素ごとに配線していた。第2の実施形態におけるアクティブマトリクス基板20aでは、ゲート線13Gを各色ごとに配線し、ソース線15Sを各画素ごとに配線している。すなわち、ゲート線13Gは、平面視において縦方向に伸びる縦線であり、ソース線15Sは、平面視において横方向に伸びる横線である。
第2の実施形態におけるアクティブマトリクス基板20aでは、同一のソース線15Sと接続されている複数の画素TFT16Tのうち、一部の画素TFT16Tは、接続されているゲート線13Gに対して異なる方向に配置されていた。また、隣り合うゲート線13Gの間隔は等間隔ではなく、非等間隔であった。
上述した第1~第4の実施形態におけるアクティブマトリクス基板20aを形成するためには、ガラス基板上にゲート線13Gを構成するゲートレイヤや、ソース線15S形成するソースレイヤを形成する。ゲートレイヤとソースレイヤは、積層方向において異なる層に形成する。このとき、積層方向と直交する面方向に各レイヤが位置ずれすることによって、ゲートレイヤとソースレイヤの重なり面積が基板毎、または場所毎に異なる場合がある。このような位置ずれが生じた場合、ゲートレイヤとソースレイヤの間の容量が設計上同じパターンであっても、実際の容量が場所毎にばらつく可能性がある。
Claims (8)
- 複数のデータ線と、
前記複数のデータ線と交差し、少なくとも複数のゲート線を含む複数の配線と、
複数のスイッチング素子を有し、前記複数の配線の少なくとも一部に接続されて、表示領域の外側から供給される制御信号に応じて、当該配線の電位を制御する駆動回路と、
表示領域を構成する複数の画素毎に設けられ、前記データ線および前記ゲート線と接続されて、対応する画素の表示を制御する複数の画素制御素子と、
を備え、
前記複数のデータ線及び前記複数のゲート線のうちの一方は、平面視において縦方向に伸びる複数の縦線であり、他方は平面視において横方向に伸びる複数の横線であって、
前記複数の画素制御素子のうち、同一の前記横線と接続されている画素制御素子の一部は、接続されている前記縦線に対する配置方向が前記同一の横線と接続されている他の画素制御素子の配置方向と異なっており、
前記複数のスイッチング素子のうちの少なくとも一部は、隣接する前記縦線の間の領域であって、隣接する前記画素制御素子の間の距離が他の隣接する前記画素制御素子の間の距離よりも広い領域に配置されている、アクティブマトリクス基板。 - 前記複数の縦線の間隔は非等間隔であり、
前記複数のスイッチング素子のうちの少なくとも一部は、非等間隔で配置されている前記複数の縦線の間の領域のうち、隣接する縦線の間の間隔が他の隣接する縦線の間の間隔よりも広い領域に配置されている、請求項1に記載のアクティブマトリクス基板。 - 前記複数の画素制御素子のうち、同一の前記縦線と接続されている画素制御素子の一部は、接続されている前記横線に対する配置方向が前記同一の縦線と接続されている他の画素制御素子の配置方向と異なっており、
前記駆動回路の構成要素である複数のスイッチング素子のうちの少なくとも一部は、隣接する前記横線の間の領域であって、隣接する前記画素制御素子の間の距離が他の隣接する前記画素制御素子の間の距離よりも広い領域に配置されている、請求項1または2に記載のアクティブマトリクス基板。 - 前記複数の横線の間隔は非等間隔であり、
前記複数のスイッチング素子のうちの少なくとも一部は、非等間隔で配置されている前記複数の横線の間の領域のうち、隣接する横線の間の間隔が他の隣接する横線の間の間隔よりも広い領域に配置されている、請求項3に記載のアクティブマトリクス基板。 - 前記複数の縦線は前記複数のデータ線であり、前記複数の横線は前記複数のゲート線である、請求項1から4のいずれか一項に記載のアクティブマトリクス基板。
- 前記複数の縦線は前記複数のゲート線であり、前記複数の横線は前記複数のデータ線である、請求項1から4のいずれか一項に記載のアクティブマトリクス基板。
- 前記画素制御素子のドレインパッドは、前記ゲート線を形成するゲートレイヤと積層方向において異なる層に形成されており、
前記ゲートレイヤには、前記ドレインパッドと当該ゲートレイヤとの間で位置ずれが生じた場合に、前記ドレインパッドと当該ゲートレイヤとの重なり面積が変化するのを抑制するための領域が設けられている、請求項1から6のいずれか一項に記載のアクティブマトリクス基板。 - 請求項1から7のいずれか一項に記載のアクティブマトリクス基板と、
カラーフィルタ及び対向電極を備える対向基板と、
前記アクティブマトリクス基板と前記対向基板との間に挟持された液晶層と、
を備える表示パネル。
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- 2015-11-20 WO PCT/JP2015/082781 patent/WO2016080541A1/ja active Application Filing
- 2015-11-20 US US15/528,508 patent/US10809581B2/en active Active
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Also Published As
Publication number | Publication date |
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CN107077036B (zh) | 2020-12-15 |
US20170255049A1 (en) | 2017-09-07 |
TW201621875A (zh) | 2016-06-16 |
CN107077036A (zh) | 2017-08-18 |
US10809581B2 (en) | 2020-10-20 |
JPWO2016080541A1 (ja) | 2017-08-31 |
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