WO2016199691A1 - 位置入力装置、及び位置入力機能付き表示装置 - Google Patents
位置入力装置、及び位置入力機能付き表示装置 Download PDFInfo
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- WO2016199691A1 WO2016199691A1 PCT/JP2016/066582 JP2016066582W WO2016199691A1 WO 2016199691 A1 WO2016199691 A1 WO 2016199691A1 JP 2016066582 W JP2016066582 W JP 2016066582W WO 2016199691 A1 WO2016199691 A1 WO 2016199691A1
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- width
- electrode
- position detection
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- floating
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
-
- 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
-
- 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
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
Definitions
- the present invention relates to a position input device and a display device with a position input function.
- touch panel can input position information within the display surface of the display panel, for example, by touching with a finger or a touch pen.
- a touch panel As a result, an intuitive operation is possible in which the user directly touches the image displayed on the display panel.
- Patent Document 1 one described in Patent Document 1 below is known.
- the touch panel controller is formed between capacitances C31 to C34 formed between the drive lines DL1 to DL4 and the sense line SL3, and between the drive lines DL1 to DL4 and the sense line SL4.
- the drive lines DL1 to DL4 are driven based on the code sequence to output the first linear sum output from the capacitances C31 to C34, and the capacitance C41.
- a differential amplifier that amplifies the difference between the first linear sum output and the second linear sum output, and capacitance values of capacitances C31 to C34
- a configuration including a saturation prevention control unit that corrects line dependency with the capacitance values of the capacitors C41 to C44 is described.
- the present invention has been completed based on the above situation, and an object thereof is to suppress a local decrease in position detection sensitivity.
- the position input device of the present invention includes a plurality of first position detection electrodes extending along a first direction and arranged side by side along a second direction orthogonal to the first direction, and the plurality of first positions. Extending along the second direction so as to include portions that overlap each other in plan view with respect to the position detection electrode, and arranged side by side along the first direction, and between the first position detection electrode A plurality of second position detection electrodes forming an electrostatic capacitance and a plurality of the first position detection electrodes are arranged adjacent to each other in plan view and are planar with respect to the plurality of second position detection electrodes.
- a plurality of floating elements which are arranged in a form including overlapping portions in view and form capacitances between the adjacent first position detection electrodes and between the overlapping second position detection electrodes, respectively.
- An electrode and a plurality of the flow A reference width floating electrode included in the ting electrode, a minimum width floating electrode included in the plurality of floating electrodes, arranged at the end in the second direction and having the narrowest width, and included in the plurality of floating electrodes.
- an intermediate width that is disposed closer to the end than the reference width floating electrode and closer to the center than the minimum width floating electrode is narrower than the reference width floating electrode and wider than the minimum width floating electrode.
- the position detection sensitivity (S / N ratio) is higher.
- the position detection sensitivity may be locally reduced due to a large noise during position detection because the capacitance tends to become relatively small and the difference between the capacitance values tends to increase.
- the plurality of floating electrodes are arranged on the end side with respect to the reference width floating electrode in the second direction, and are arranged on the center side with respect to the minimum width floating electrode at the end, so that the width is larger than that of the reference width floating electrode.
- the intermediate width floating electrode is included which is narrower and wider than the minimum width floating electrode, the electrostatic capacitance formed between each floating electrode and the plurality of first position detection electrodes arranged along the second direction. It is avoided that the capacitance values are equalized and an extreme capacitance value difference occurs on the end side in the second direction.
- the first position detection electrode is less susceptible to noise on the end side in the second direction at the time of position detection, and the situation in which the position detection sensitivity is locally lowered on the end side in the second direction is less likely to occur. Become.
- the plurality of first position detection electrodes are configured to have the same width. In this way, the total area of the plurality of floating electrodes is kept equal to that of the prior art as compared with the case where the width of the first position detection electrode located at the end in the second direction is relatively wide.
- the minimum width floating electrode is configured such that its own width is larger than a half value of the width of the intermediate width floating electrode. In this way, the difference between the width of the minimum width floating electrode and the width of the intermediate width floating electrode is sufficiently small, so that the difference in capacitance value that can occur on the end side in the second direction can be further alleviated. Can do.
- At least two intermediate width floating electrodes having the same width are arranged so as to sandwich the first position detection electrode in the second direction. In this way, the configuration is simplified as compared with the case where two intermediate width floating electrodes having different widths are arranged.
- the plurality of first position detection electrodes are arranged on the end side with respect to the reference width first position detection electrode in the second direction and at the center side with respect to the maximum width first position detection electrode at the end.
- Each of the first position detection electrodes, the width of the first position detection electrode is wider than the reference width first position detection electrode and is narrower than the maximum width first position detection electrode.
- Capacitance values of capacitance formed between a plurality of floating electrodes arranged in two directions are more preferably equalized, and a difference in capacitance values that can occur on the end side in the second direction is further alleviated. .
- the intermediate width first position detection electrode has a difference between its own width and the width of the reference width first position detection electrode, and a difference between its own width and the width of the maximum width first position detection electrode. It is configured to be equal.
- the width of the intermediate width first position detection electrode is an average value of the width of the reference width first position detection electrode and the width of the maximum width first position detection electrode. Capacitance values of capacitance formed between the detection electrode and the plurality of floating electrodes arranged along the second direction are more preferably equalized and a difference in capacitance values that can occur on the end side in the second direction Is further relaxed.
- At least two intermediate width floating electrodes having different widths are arranged so as to sandwich the first position detection electrode in the second direction.
- a difference in capacitance value generated between the first position detection electrode adjacent to the small-width floating electrode can be more appropriately reduced.
- the display device with a position input function is a display device with a position input function including at least the position input device and a display panel including the position input device.
- a display device with a position input function by providing the display panel and the position input device, the user's position input and the display on the display panel can be smoothly coordinated to improve the feeling of use. This is suitable for the purpose.
- the display panel includes: an array substrate having at least display elements disposed in a display area where an image is displayed; and an opposing substrate disposed at an interval so as to face the array substrate.
- the position input device includes the first position detection electrode and the floating electrode, while the second position detection electrode is provided in the display area on a surface of the counter substrate facing the array substrate.
- An electrode is provided in the display region on a plate surface of the counter substrate facing the side opposite to the array substrate side, thereby being integrated with the display panel.
- Sectional drawing of the liquid crystal display device which concerns on Embodiment 1 of this invention.
- Plan view of a liquid crystal panel provided in a liquid crystal display device Plan view of the array substrate constituting the liquid crystal panel
- Plan view of the CF substrate constituting the liquid crystal panel Bottom view of the CF substrate constituting the liquid crystal panel
- An enlarged plan view of the central part of the array substrate Vii-vii sectional view of FIG. Viii-viii sectional view of FIG.
- the top view which expanded the both ends side part about the short side direction among CF substrates The bottom view which expanded the end side part about the short side in the edge part on the opposite side to the terminal part side about a long side direction among CF boards.
- the bottom view which expanded the end side part about the short side direction in the edge part by the side of the terminal part about a long side direction among CF boards The bottom view which expanded further the end side part about the short side in the edge part on the opposite side to the terminal part side about the long side direction among CF substrates
- substrate The top view which shows each width
- FIGS. 1 A first embodiment of the present invention will be described with reference to FIGS.
- a liquid crystal display device (display device with a position input function) 10 having a position input function is illustrated.
- a part of each drawing shows an X axis, a Y axis, and a Z axis, and each axis direction is drawn to be a direction shown in each drawing.
- FIG. 2 and the like are used as a reference, and the upper side of the figure is the front side and the lower side of the figure is the back side.
- the liquid crystal display device 10 displays an image and can detect position information input by the user based on the displayed image (with a position input function).
- Display panel 11 and a backlight device (illumination device) 12 that is an external light source that supplies light used for display to the liquid crystal panel 11.
- the liquid crystal display device 10 includes a chassis 13 that houses the backlight device 12, a frame 14 that holds the backlight device 12 between the chassis 13, and a bezel that holds the liquid crystal panel 11 between the frames 14. Holding member) 15.
- the backlight device 12 includes at least a light source (for example, a cold cathode tube, an LED, an organic EL, etc.) and an optical member having an optical function such as conversion into a surface shape emitted from the light source. Is done.
- a light source for example, a cold cathode tube, an LED, an organic EL, etc.
- an optical member having an optical function such as conversion into a surface shape emitted from the light source. Is done.
- the liquid crystal display device 10 includes a mobile phone (including a smartphone), a notebook computer (including a tablet notebook computer), a portable information terminal (including an electronic book and a PDA), a digital photo frame, It is used for various electronic devices (not shown) such as portable game machines. For this reason, the screen size of the liquid crystal panel 11 constituting the liquid crystal display device 10 is set to about several inches to several tens of inches, and is generally classified into a small size and a small size.
- the liquid crystal panel 11 will be described. As shown in FIG. 2, the liquid crystal panel 11 has a vertically long rectangular shape (rectangular shape) as a whole, and the long side direction coincides with the Y-axis direction and the short side direction coincides with the X-axis direction. Yes.
- the liquid crystal panel 11 includes a display area (active area) AA that can display an image, a frame shape (frame shape) surrounding the display area AA, and a non-display area (non-active area) NAA that cannot display an image. It is divided.
- the display area AA is arranged at a position offset toward one end side (the upper side shown in FIG. 2) in the long side direction.
- the non-display area NAA is secured in a substantially frame-shaped area (frame portion in a CF substrate 11a described later) surrounding the display area AA and the other end side in the long side direction (lower side shown in FIG. 2).
- a driver (panel drive unit) 16 for driving the liquid crystal panel 11
- a flexible This is a mounting area where the substrate (external connection component) 17 is mounted.
- the flexible substrate 17 has flexibility and connects the liquid crystal panel 11 and the control circuit board 18 which is an external signal supply source, and transmits various signals supplied from the control circuit board 18 to the driver 16 and the like. Is possible.
- the driver 16 is composed of an LSI chip having a drive circuit therein, processes an input signal supplied from the control circuit board 18 to generate an output signal, and outputs the output signal to the display area AA of the liquid crystal panel 11. It is supposed to be output.
- a one-dot chain line that is slightly smaller than the CF substrate 11a represents the outer shape of the display area AA, and a region outside the one-dot chain line is a non-display area NAA.
- the liquid crystal panel 11 includes a pair of substrates 11a and 11b, and liquid crystal molecules that are interposed between both the substrates 11a and 11b and change in optical properties when an electric field is applied.
- a liquid crystal layer (liquid crystal) 11c, and the substrates 11a and 11b are bonded together by a seal portion (not shown) in a state where a gap corresponding to the thickness of the liquid crystal layer 11c is maintained.
- the front side (front side) of the pair of substrates 11a and 11b is a CF substrate (counter substrate) 11a
- the back side (back side) is an array substrate (element substrate, active matrix substrate) 11b.
- the CF substrate 11a and the array substrate 11b are provided with a glass substrate GS that is almost transparent (having high translucency), and various films are laminated on the glass substrate GS by a known photolithography method or the like. It is supposed to be.
- the CF substrate 11a has a short side dimension substantially equal to that of the array substrate 11b, but a long side dimension smaller than that of the array substrate 11b. Then, they are bonded together with the ends of one side (the upper side shown in FIG. 2) in the long side direction aligned. Therefore, the other end (the lower side shown in FIG.
- the display area AA on the inner surface side of the array substrate 11b (the liquid crystal layer 11c side and the surface facing the CF substrate 11a) is a TFT (Thin Film Transistor, display element) as a switching element.
- a TFT Thin Film Transistor, display element
- a gate wiring 21 and a source wiring 22 having a lattice shape are disposed so as to surround the TFT 19 and the pixel electrode 20.
- the TFT 19 and the pixel electrode 20 are arranged in a matrix at the intersection of the gate wiring 21 and the source wiring 22 that form a lattice.
- the gate wiring 21 and the source wiring 22 are connected to the gate electrode 19 a and the source electrode 19 b of the TFT 19, respectively, and the pixel electrode 20 is connected to the drain electrode 19 c of the TFT 19.
- the TFT 19, the pixel electrode 20, the gate wiring 21, and the source wiring 22 constitute a part of a display circuit that is a circuit for displaying an image. The detailed configuration of the TFT 19 will be described later.
- the pixel electrode 20 has a vertically long rectangular shape (rectangular shape) when seen in a plan view.
- the array substrate 11b is provided with a common electrode 23 that forms an electric field with the pixel electrode 20 by supplying a common potential (reference potential).
- the liquid crystal panel 11 according to the present embodiment is an FFS (Fringe Field Switching) mode in which the operation mode is further improved from the IPS (In-Plane Field Switching) mode.
- the pixel electrode 20 and the common electrode 23 are arranged in different layers.
- slits 20 a extending in an oblique direction with respect to the X-axis direction and the Y-axis direction when viewed in a plan view are formed intermittently.
- a plurality of color filters 24 are arranged in parallel in a matrix so that each colored portion such as) overlaps with each pixel electrode 20 on the array substrate 11b side in a plan view.
- a substantially lattice-shaped light shielding portion (black matrix) 25 for preventing color mixture is formed between each colored portion constituting the color filter 24, a substantially lattice-shaped light shielding portion (black matrix) 25 for preventing color mixture is formed.
- the light shielding portion 25 is arranged so as to overlap the above-described gate wiring 21 and source wiring 22 in a plan view.
- a planarizing film (protective film, overcoat film) 26 is provided on the surface of the color filter 24 and the light shielding portion 25.
- one display pixel which is a display unit by a set of three colored portions of R (red), G (green), and B (blue) and three pixel electrodes 20 facing them. Is configured.
- the display pixel includes a pixel portion PX of three colors of R, G, and B. Each pixel portion PX is configured by a set of the pixel electrode 20 and a coloring portion facing the pixel electrode 20.
- pixel portions PX of each color are arranged repeatedly along the row direction (X-axis direction) on the plate surface of the liquid crystal panel 11 to constitute a pixel portion group, and this pixel portion group is arranged in the column direction ( Many are arranged along the (Y-axis direction).
- the above-described light-shielding portion 25 is arranged in a form that partitions between adjacent pixel portions PX.
- the array substrate 11b is mainly provided with a structure for displaying an image display function (display function) among the functions of the liquid crystal panel 11.
- the array substrate 11b includes a base coat film 27, a semiconductor film 28, a gate insulating film (inorganic insulating film) 29, and a first metal in order from the lower layer side (glass substrate GS side, back side).
- a film (gate metal film) 30, a first interlayer insulating film (inorganic insulating film) 31, a second metal film (source metal film) 32, a planarizing film (organic insulating film) 33, a first transparent electrode film 34, a second An interlayer insulating film (inorganic insulating film) 35 and a second transparent electrode film 36 are stacked.
- the alignment film described above is formed on the upper side of the second interlayer insulating film 35 and the second transparent electrode film 36.
- the base coat film 27 is a solid pattern that covers the entire surface of the glass substrate GS forming the array substrate 11b.
- the semiconductor film 28 is stacked on the upper layer side of the base coat film 27 and is patterned so as to be disposed in the display area AA and the non-display area NAA, respectively.
- the semiconductor film 28 is patterned in an island shape at least in the display area AA in accordance with the arrangement of the TFT 19 described later.
- the semiconductor film 28 is made of a CG silicon (Continuous Grain Silicon) thin film which is a kind of polycrystalline silicon thin film (polycrystalline silicon thin film).
- the CG silicon thin film is formed, for example, by adding a metal material to an amorphous silicon thin film and performing a heat treatment for a short time at a low temperature of about 550 ° C. or less. have.
- the gate insulating film 29 is stacked on the upper side of the base coat film 27 and the semiconductor film 28, and has a solid pattern extending over the display area AA and the non-display area NAA. For example, silicon oxide (SiO 2). ).
- the first metal film 30 is stacked on the upper layer side of the gate insulating film 29 and is patterned so as to be disposed in the display area AA and the non-display area NAA, for example, titanium (Ti) and copper (Cu).
- the laminated film is formed.
- the first metal film 30 constitutes the gate wiring 21 and the gate electrode 19a described above.
- the first interlayer insulating film 31 is laminated on the upper side of the gate insulating film 29 and the first metal film 30, and has a solid pattern extending over the display area AA and the non-display area NAA. It is made of silicon oxide (SiO 2 ).
- the first interlayer insulating film 31 maintains the insulation between the intersections of the gate wiring 21 and the source wiring 22 described above.
- the second metal film 32 is laminated on the upper layer side of the first interlayer insulating film 31 and is patterned so as to be respectively disposed in the display area AA and the non-display area NAA.
- titanium (Ti) and copper ( Cu) laminated film For example, titanium (Ti) and copper ( Cu) laminated film.
- the second metal film 32 constitutes the source wiring 22, the source electrode 19b, the drain electrode 19c, and the like described above.
- the planarizing film 33 is stacked on the upper side of the first interlayer insulating film 31 and the second metal film 32, and has a solid pattern extending across the display area AA and the non-display area NAA. It is made of an acrylic resin material such as polymethyl methacrylate resin (PMMA).
- PMMA polymethyl methacrylate resin
- the planarizing film 33 is relatively thicker than the other insulating films 29, 31, and 35, which are inorganic insulating films. Therefore, the planarizing film 33 can suitably planarize the surface on the liquid crystal layer 11c side (the surface on which the alignment film is disposed) in the array substrate 11b.
- the first transparent electrode film 34 is laminated on the upper layer side of the planarizing film 33 and is formed as a substantially solid pattern at least in the display area AA.
- ITO Indium Tin Oxide
- ZnO Zinc Oxide
- the first transparent electrode film 34 constitutes a common electrode 23 having a substantially solid pattern.
- the second interlayer insulating film 35 is laminated on the upper side of the planarizing film 33 and the first transparent electrode film 34, and has a solid pattern extending over the display area AA and the non-display area NAA.
- it is made of silicon nitride (SiN x ).
- the second transparent electrode film 36 is laminated on the upper layer side of the second interlayer insulating film 35 and is patterned in an island shape in accordance with the arrangement of the TFTs 19 in the display area AA.
- ITO Indium Tin Oxide
- ZnO It is made of a transparent electrode material such as (Zinc Oxide).
- the pixel electrode 20 is constituted by the second transparent electrode film 36.
- the gate insulating film 29, the first interlayer insulating film 31, the planarizing film 33, and the second interlayer insulating film 35 are patterned in the manufacturing process of the array substrate 11b, so that contact holes are formed at predetermined positions. Openings such as CH1 and CH2 are formed.
- the TFT 19 arranged in the display area AA in the array substrate 11b has a channel portion 19d made of a semiconductor film 28, and is superimposed on the channel portion 19d on the upper layer side through a gate insulating film 29. And a source electrode 19b and a drain electrode 19c disposed on the upper layer side with respect to the gate electrode 19a via the first interlayer insulating film 31, and a so-called top gate type (staggered) Type). Among these, the source electrode 19b and the drain electrode 19c are connected to the channel portion 19d through contact holes CH1 formed in the gate insulating film 29 and the first interlayer insulating film 31, respectively. Electrons can move between the drain electrode 19c.
- the semiconductor film 28 forming the channel portion 19d is made of a CG silicon thin film as described above. Since this CG silicon thin film has an electron mobility as high as about 200 to 300 cm 2 / Vs, for example, compared to an amorphous silicon thin film or the like, the semiconductor film 28 made of this CG silicon thin film is used as the channel portion 19 d of the TFT 19. As a result, the TFT 19 can be miniaturized and the amount of light transmitted through the pixel electrode 20 can be maximized, which is suitable for achieving high definition and low power consumption.
- the drain electrode 19c of the TFT 19 is connected to the pixel electrode 20 made of the second transparent electrode film 36 through contact holes CH2 formed in the planarizing film 33 and the second interlayer insulating film 35, respectively.
- the gate electrode 19a of the TFT 19 when the gate electrode 19a of the TFT 19 is energized, a current flows between the source electrode 19b and the drain electrode 19c via the channel portion 19d, and a predetermined potential is applied to the pixel electrode 20.
- the common electrode 23 made of the first transparent electrode film 34 is arranged so as to overlap with each pixel electrode 20 in a plan view with the second interlayer insulating film 35 interposed therebetween.
- the pixel electrode 20 is located at a position overlapping the contact hole CH2 of the planarization film 33 and the second interlayer insulating film 35 in plan view. An opening for passing the contact portion is formed.
- a display circuit is provided together with the TFT 19 and the like at a position adjacent to the display area AA in the X-axis direction (the short side direction of the liquid crystal panel 11) as shown in FIG.
- a monolithic circuit unit (element drive unit) 37 to be configured is provided.
- a pair of monolithic circuit portions 37 are provided so as to sandwich the display area AA from both sides in the X-axis direction, and are provided over a range extending almost the entire length of the display area AA along the Y-axis direction.
- the monolithic circuit unit 37 is connected to the gate wiring 21 drawn from the display area AA, so that control for supplying the output signal from the driver 16 to the TFT 19 can be performed.
- the monolithic circuit portion 37 is monolithically formed on the array substrate 11b based on the same semiconductor film 28 as the TFT 19 in the display area AA, and thereby a control circuit for controlling the supply of output signals to the TFT 19 and its It has a circuit element.
- the circuit elements constituting the control circuit include, for example, a circuit TFT (circuit thin film transistor) (not shown) using the semiconductor film 28 as a channel portion.
- the control circuit includes a circuit wiring section (not shown) using the first metal film 30 and the second metal film 32.
- the monolithic circuit unit 37 includes a scanning circuit that sequentially scans each gate wiring 21 by supplying a scanning signal included in an output signal from the driver 16 to each gate wiring 21 at a predetermined timing.
- the monolithic circuit unit 37 can include an attached circuit such as a level shifter circuit or an ESD protection circuit.
- the monolithic circuit unit 37 is connected to the driver 16 by connection wiring (not shown) formed on the array substrate 11b.
- the liquid crystal panel 11 has both a display function for displaying an image and a position input function for detecting position information input by the user based on the displayed image.
- a touch panel pattern (position input device) TPP for exhibiting a position input function is incorporated (in-cell).
- the touch panel pattern TPP is a so-called projected capacitive method, and its detection method is a mutual capacitance method.
- This touch panel pattern TPP is exclusively provided on the CF substrate 11a. Specifically, as shown in FIGS.
- the touch panel pattern TPP has a detection electrode (first side) provided on the outer surface side (the side opposite to the liquid crystal layer 11 c side, the front side, the display surface side) of the CF substrate 11 a. And at least a drive electrode (second position detection electrode, transmission electrode) 39 provided on the inner surface side (the side opposite to the liquid crystal layer 11c side, the back side, and the display surface side). It becomes.
- this touch panel pattern TPP presence / absence of position input (touch operation) due to a difference in capacitance due to presence / absence of a substance (such as a user's finger) that blocks an electric field formed between the detection electrode 38 and the drive electrode 39. Can be detected.
- the detection electrodes 38 and the drive electrodes 39 constituting the touch panel pattern TPP are arranged in the display area AA of the CF substrate 11a. Therefore, the display area AA in the liquid crystal panel 11 substantially coincides with the touch area where the input position can be detected, and the non-display area NAA substantially coincides with the non-touch area where the input position cannot be detected.
- the both ends of the short side direction (X-axis direction) that are non-touch areas (non-display areas NAA) on the inner surface of the CF substrate 11a are connected to the drive electrodes 39 and transmit signals to the drive electrodes 39.
- Position detection wiring sections 40 are provided for each.
- a touch panel controller (not shown) is provided on the outer surface side of one end portion (the lower end portion shown in FIGS. 4 and 5) in the long side direction (Y-axis direction) which is a non-touch area of the CF substrate 11a.
- a touch panel flexible substrate 41 for transmitting a signal is connected between the sensor electrode 38 and the detection electrode 38.
- the touch panel flexible substrate 41 is arranged so as to substantially overlap with the display flexible substrate 17 connected to the liquid crystal panel 11 when seen in a plan view. Further, in the non-touch region on the inner surface of the CF substrate 11a, the portion overlapping the touch panel flexible substrate 41 is connected to the end of the position detection wiring portion 40 opposite to the side connected to the drive electrode 39.
- a pair of CF substrate side contact portions (signal supply portion, counter substrate side signal supply portion) 42 is provided.
- the portion overlapping the CF substrate side contact portion 42 is connected to the CF substrate side contact portion 42 in an array substrate side contact portion ( A pair of element substrate side signal supply units) 43 is provided.
- the array substrate side contact portion 43 is connected to the driver 16 via connection wiring (not shown) formed on the inner surface of the array substrate 11b. Therefore, a signal from a touch panel controller (not shown) is transmitted to the drive electrode 39 through the flexible substrate 17, the driver 16, the array substrate side contact portion 43, the CF substrate side contact portion 42, and the position detection wiring portion 40 in order. It has become so.
- the CF substrate side contact portion 42 and the array substrate side contact portion 43 are disposed so as to overlap with a seal portion (not shown) for sealing the liquid crystal layer 11c in a plan view. It is supposed that mutual conduction connection is achieved through the contained conductive particles.
- the detection electrode 38 is provided so as to extend along the long side direction, that is, the Y-axis direction (first direction) in the display area AA on the outer surface of the CF substrate 11 a.
- the planar shape is a vertically long rectangular shape.
- the detection electrode 38 is made of a transparent electrode film 44 using a transparent electrode material such as ITO (Indium Tin Oxide) or ZnO (Zinc Oxide), like the pixel electrode 20 and the common electrode 23. For this reason, although the detection electrode 38 is disposed in the display area AA of the CF substrate 11a, it is difficult for the user to visually recognize the detection electrode 38.
- the detection electrode 38 is further larger than the long side dimension of the display area AA.
- the portion (the lower end portion shown in FIG. 4) reaches the non-display area NAA and is connected to the touch panel flexible substrate 41.
- the detection electrode 38 has a line width larger than the dimension of the display pixel (pixel unit PX) in the X-axis direction and the like, and has a size that spans between the plurality of display pixels (pixel unit PX). (See FIG. 7).
- the line width of the detection electrode 38 is set to about several mm (for example, about 2 mm), which is far more than about several hundred ⁇ m which is the dimension in the X-axis direction of the display pixel (pixel unit PX). It is considered big.
- FIGS. 4 and 9 there are a plurality of detection electrodes 38 in the short-side direction, that is, the X-axis direction (second direction, alignment direction of the detection electrodes 38) in the display area AA on the outer surface of the CF substrate 11a. 12 are arranged side by side at intervals. In the display area AA on the outer surface of the CF substrate 11a, a plurality of floating electrodes 45 are provided so as to be adjacent to each detection electrode 38 in the X-axis direction in plan view.
- the plurality of floating electrodes 45 are arranged so as to be sandwiched between the detection electrodes 38 adjacent to each other in the X-axis direction, and in the X-axis direction with respect to the detection electrode 38 positioned at the extreme end in the X-axis direction. Are arranged adjacent to each other on the end side.
- Each floating electrode 45 is physically and electrically separated from each detection electrode 38 and has a floating island shape, and forms a capacitance with at least the detection electrode 38 adjacent in the X-axis direction. It is supposed to be. Therefore, among the plurality of floating electrodes 45, the one arranged between the detection electrodes 38 adjacent to each other in the X-axis direction is between the two detection electrodes 38 adjacent to the left and right in the X-axis direction.
- each floating electrode 45 is arranged so as to overlap with a driving electrode 39 to be described later in plan view, a capacitance is formed between the floating electrodes 45 and the overlapping driving electrode 39.
- the floating electrode 45 is made of the same transparent electrode film 44 as the detection electrode 38, and is arranged in the same layer as the detection electrode 38 on the outer surface of the CF substrate 11a.
- the floating electrode 45 and the detection electrode 38 are formed, after forming the solid transparent electrode film 44 on the outer surface of the CF substrate 11a, the transparent electrode film 44 is patterned to electrically connect each other. Independent floating electrodes 45 and detection electrodes 38 are formed.
- the floating electrode 45 makes the transmittance of the region between the detection electrodes 38 adjacent to each other in the X-axis direction in the CF substrate 11a equal to the transmittance of the region where the detection electrode 38 is disposed. The presence of is difficult for the user to see.
- the floating electrode 45 adjacent to the detection electrode 38 in the X-axis direction is divided into a plurality of divided floating portions that are divided in the Y-axis direction so as to individually overlap with a plurality of drive electrodes 39 to be described later. It is composed of an electrode (divided first floating electrode) 45S.
- the divided floating electrode 45S has a vertically long planar shape, the long side dimension (dimension in the Y-axis direction) is shorter than the long side dimension of the detection electrode 38, and the width dimension of the drive electrode 39 to be described later. (Dimension in the Y-axis direction).
- the plurality of divided floating electrodes 45S are arranged so as to individually overlap the plurality of drive electrodes 39 arranged along the Y-axis direction when viewed in a plane. Thereby, each divided floating electrode 45S forms an electrostatic capacity individually with each of the overlapping drive electrodes 39, and is hardly affected by the potential of the other drive electrodes 39 that do not overlap. It is said.
- the number of divided floating electrodes 45S constituting one floating electrode 45 matches the number of drive electrodes 39 arranged along the Y-axis direction.
- the drive electrode 39 has an X-axis direction (a first direction) orthogonal to the Y-axis direction (first direction) in which the detection electrode 38 extends in the display area AA on the inner surface of the CF substrate 11a. (Second direction) is provided.
- the drive electrode 39 has a length dimension equal to the short side dimension of the display area AA, whereas its line width is wider than the line width of the detection electrode 38.
- a plurality of drive electrodes 39 are arranged side by side along the Y-axis direction (first direction, the direction in which the drive electrodes 39 are arranged) orthogonal to the extending direction on the inner surface of the display area AA of the CF substrate 11a.
- the intervals between adjacent drive electrodes 39 in the Y-axis direction are equal to each other, and it can be said that the plurality of drive electrodes 39 are arranged at an equal pitch.
- the drive electrode 39 partially intersects the detection electrode 38 and the floating electrode 45 in a plan view, and the intersecting portions are opposed to each other with the glass substrate GS of the CF substrate 11a interposed therebetween. Capacitances can be formed respectively.
- the drive electrode 39 is made of a metal film 46 that is more conductive than the transparent electrode film 44 that constitutes the detection electrode 38 and the floating electrode 45, thereby reducing wiring resistance. .
- the metal film 46 constituting the drive electrode 39 is made of a metal material such as aluminum, molybdenum, titanium, tungsten, copper, silver, or gold.
- the CF substrate side contact portion 42 is constituted by the metal film 46 constituting the drive electrode 39.
- the drive electrode 39 includes a plurality of divided drive electrodes (divided second position detection electrodes, unit drive electrodes, branch drive electrodes) 39S, and each of these divided drives.
- the electrode 39S is arranged so as to overlap with a part of the light shielding portion 25 of the CF substrate 11a in a plan view.
- the plurality of divided drive electrodes 39S constituting the drive electrode 39 extend along the X-axis direction (second direction), and the upper layer side of the light shielding portion 25 that extends along the X-axis direction ( It is provided in such a manner that it is laminated on the array substrate 11b side, the liquid crystal layer 11c side, and the glass substrate GS side).
- the drive electrode 39 is hidden by the light shielding portion 25 when viewed from the user, so that it is difficult for external light to be reflected by the drive electrode 39 and the drive electrode 39 is not used by the user. It is assumed that the situation where it is visually recognized does not easily occur.
- the divided drive electrodes 39S are arranged in a plurality of rows with an interval in the Y-axis direction (first direction), and the interval is an interval between adjacent gate wirings 21 in the Y-axis direction (in the Y-axis direction).
- the arrangement pitch between the pixel portions PX and the length dimension of the pixel electrode 20) are substantially equal.
- Each divided drive electrode 39S is arranged so as to overlap with the gate wiring 21 as viewed in a plane.
- the divided drive electrode 39S constituting the drive electrode 39 has a line width smaller than the width dimension of the portion extending along the X-axis direction in the light shielding portion 25.
- the divided drive electrode 39S of the CF substrate 11a Even when a relative positional shift occurs when patterning the light shielding portion 25 and the drive electrode 39 in the manufacturing process, there is a high degree of certainty that the divided drive electrode 39S is superposed on the light shielding portion 25. Further, the divided drive electrode 39S has a line width smaller than that of the detection electrode 38.
- the position detection wiring section 40 has one end connected to one end of the drive electrode 39 in the non-display area NAA on the inner surface of the CF substrate 11a.
- the end portion is formed so as to be connected to the CF substrate side contact portion 42, and most of the end portion extends along the Y-axis direction (first direction) orthogonal to the extending direction of the drive electrode 39. It is provided in the form.
- the position detection wiring unit 40 includes a first wiring unit 40a connected to one end of the drive electrode 39, a second wiring unit 40b extending from the first wiring unit 40a along the Y-axis direction, A third wiring portion 40c having a planar shape bent from the two wiring portions 40b to the CF substrate side contact portion 42;
- the position detection wiring section 40 has a line width that gradually decreases from the drive electrode 39 toward the CF substrate side contact section 42, and the line width of the first wiring section 40 a is substantially equal to the line width of the drive electrode 39.
- the line width of the second wiring portion 40b is narrower than the line width of the first wiring portion 40a
- the line width of the third wiring portion 40c is more than the line width of the second wiring portion 40b.
- the extended distance of the position detection wiring section 40 extends from the drive electrode 39 to be connected to the CF substrate side contact section 42. Accordingly, the position detection wiring portion 40 connected to the drive electrode 39 relatively close to the CF substrate side contact portion 42 has a relatively short extension surface distance, but is relatively far from the CF substrate side contact portion 42. The position detection wiring portion 40 connected to the far drive electrode 39 has a relatively long extended surface distance.
- the position detection wiring part 40 is made of the same metal film 46 as the drive electrode 39 and is arranged in the same layer as the drive electrode 39 on the inner surface of the CF substrate 11a. As described above, since the position detection wiring section 40 is made of the metal film 46, the wiring resistance is sufficiently low, so that the signal transmitted to the drive electrode 39 is hardly dulled. It is supposed to be. Since the position detection wiring section 40 is made of the metal film 46, the position detection wiring section 40 has almost no translucency, but is disposed in the non-display area NAA in the CF substrate 11a, so that the display quality is hardly adversely affected. ing.
- a plurality of the position detection wiring portions 40 are arranged in such a manner that the drive electrodes 39 are sandwiched from both sides in the extending direction. That is, the position detection wiring unit 40 is divided and arranged on the left and right sides of the non-display area NAA (non-touch area) with the display area AA (touch area) sandwiched in the X-axis direction. These position detection wiring portions 40 are respectively arranged so as to overlap each monolithic circuit portion 37 provided in the non-display area NAA of the array substrate 11b in a plan view.
- one position detection wiring section 40 that overlaps with one (for example, the right side in FIG. 5) monolithic circuit section 37 is connected to one end in the extending direction of the drive electrode 39.
- the other position detection wiring portion 40 that overlaps the other (for example, the left side of FIG. 5) monolithic circuit portion 37 is connected to the other end in the extending direction of the drive electrode 39.
- the plurality of drive electrodes 39 arranged along the Y-axis direction have one end connected to one position detection wiring unit 40 and the other end connected to the other position detection wiring unit 40. Are arranged in an alternating manner in the Y-axis direction. More specifically, the odd-numbered drive electrodes 39 counted from the CF substrate side contact portion 42 side in the Y-axis direction are connected to the other position detection wiring portion 40, whereas the even-numbered drive electrodes 39 Are connected to the position detection wiring section 40.
- the non-display area NAA on the inner surface of the CF substrate 11 a has an X axis relative to the end of each drive electrode 39 opposite to the side connected to the position detection wiring section 40.
- Dummy wiring portions 47 are provided adjacent to each other in the direction.
- the dummy wiring portion 47 has a dimension in the Y-axis direction that is substantially equal to the line width of the drive electrode 39 (dimension in the Y-axis direction), and is arranged for each of the plurality of drive electrodes 39 arranged in the X-axis direction. Arranged individually. Specifically, the dummy wiring portion 47 is arranged adjacent to the other end portion of the drive electrode 39 connected to one position detection wiring portion 40 and the other position detection wiring portion 40.
- the dummy wiring part 47 is between the drive electrode 39 adjacent in the X-axis direction and the second wiring part 40b constituting the position detection wiring part 40 adjacent to the side far from the CF substrate side contact part 42 in the Y-axis direction. It is arranged in the form sandwiched between.
- the dummy wiring portion 47 has a dimension in the X-axis direction that is smaller than the distance between the drive electrode 39 that sandwiches the dummy wiring portion 47 and the second wiring portion 40b.
- the former has a dimension in the X axis direction that is larger than the latter. It is supposed to be small.
- the dummy wiring part 47 is made of the same metal film 46 as the drive electrode 39 and the position detection wiring part 40, and is arranged in the same layer as the drive electrode 39 and the position detection wiring part 40 on the inner surface of the CF substrate 11a. Note that the interval between the dummy wiring portion 47 and the adjacent second wiring portion 40b is preferably included in the range of 3 ⁇ m to 100 ⁇ m, for example.
- the dummy wiring portion 47 is arranged so as to overlap with the monolithic circuit portion 37 provided in the non-display area NAA of the array substrate 11b in a plan view. Specifically, the dummy wiring portion 47 arranged adjacent to one end portion of the drive electrode 39 connected to the other position detection wiring portion 40 overlaps with the one monolithic circuit portion 37 in a plan view. On the other hand, the other dummy wiring portion 47 arranged adjacent to the other end portion of the drive electrode 39 connected to the one position detection wiring portion 40 is flat with the other monolithic circuit portion 37. Is superimposed.
- These dummy wiring portions 47 are the end portions of the drive electrodes 39 opposite to the side connected to the position detection wiring portion 40, and X It arrange
- the dummy wiring part 47 is connected to the end of the drive electrode 39 adjacent in the X-axis direction, in other words, the end of the drive electrode 39 opposite to the side connected to the position detection wiring part 40.
- the noise can be shielded with high efficiency by the cooperation of the position detection wiring unit 40 and the dummy wiring unit 47.
- a metal film 46 constituting the drive electrode 39, the position detection wiring part 40, the CF substrate side contact part 42, and the dummy wiring part 47 is formed on the inner surface of the CF substrate 11a, and the metal film 46 is formed.
- the drive electrode 39 and the position detection wiring unit 40 are disconnected by attempting to energize the CF substrate side contact unit 42 and the dummy wiring unit 47 with the continuity testing pad constituting the continuity testing device. It is possible to detect whether or not a defect such as the above has occurred.
- the dummy wiring portion 47 can be used for the energization inspection of the drive electrode 39 and the position detection wiring portion 40.
- the dummy wiring portion 47 does not exhibit any particular function regarding the position input function.
- the line width of the second wiring section 40b varies depending on the drive electrode 39 to be connected. Specifically, in the position detection wiring unit 40, the line widths of the first wiring unit 40a and the third wiring unit 40c are substantially constant regardless of the drive electrode 39 to be connected, whereas the position of the second wiring unit 40b.
- the line width is narrower as it is connected to the drive electrode 39 closer to the CF substrate side contact portion 42 and wider as it is connected to the drive electrode 39 farther from the CF substrate side contact portion 42.
- the position detection wiring portion 40 connected to the drive electrode 39 far from the CF substrate side contact portion 42 is relatively different from the position detection wiring portion 40 connected to the drive electrode 39 close to the CF substrate side contact portion 42.
- the wiring resistance tends to be high, but the wiring resistance is kept low by relatively widening the line width of the second wiring portion 40b as described above. Can do.
- the position detection wiring part 40 connected to the drive electrode 39 far from the CF substrate side contact part 42 and the position detection wiring part 40 connected to the drive electrode 39 close to the CF substrate side contact part 42 are interposed.
- the difference in wiring resistance that can be generated can be reduced, whereby the position detection performance is hardly deteriorated.
- the dimension (line width) of the first wiring part 40a in the Y-axis direction of the position detection wiring part 40 is substantially constant, the dimension of the first wiring part 40a in the X-axis direction is the CF substrate side. The smaller the electrode connected to the drive electrode 39 closer to the contact portion 42, the smaller the electrode.
- a light shielding portion 25, a color filter 24, a metal film 46, and a planarizing film 26 are laminated on the CF substrate 11a in order from the lower layer side (glass substrate GS side, front side).
- the alignment film described above is laminated on the upper layer side of the planarizing film 26.
- a columnar photo spacer portion that protrudes through the liquid crystal layer 11 c toward the array substrate 11 b is provided on the upper layer side of the planarizing film 26. Therefore, the cell gap can be kept constant mainly in the display area AA.
- the light shielding portion 25 is arranged on the surface of the glass substrate GS forming the CF substrate 11a so as to straddle the display area AA and the non-display area NAA.
- a light shielding material for example, carbon black
- the light-shielding portion 25 is patterned in a lattice pattern when viewed in a plane on the display area AA, whereas the portion disposed in the non-display area NAA has a frame shape (frame shape) when viewed in a plane. Patterned.
- the portion arranged in the display area AA is formed by connecting a portion extending along the Y-axis direction and a portion extending along the X-axis direction, and these portions.
- the pixel portion PX is defined.
- the portion extending along the Y-axis direction in the light shielding portion 25 is, as shown in FIG. 12, an interval corresponding to the short side dimension of the pixel portion PX in the X-axis direction (in the X-axis direction).
- the color filter 24 is arranged in the display area AA and is patterned in an island shape according to the arrangement of the pixel electrodes 20 on the array substrate 11b side described later. A pigment for coloring is contained in the resin material.
- the color filter 24 has a number of colored portions arranged in a matrix (matrix shape) in a matrix (matrix shape) at a position overlapping the pixel electrodes 20 on the array substrate 11b side in the plane in the display area AA of the CF substrate 11a. It is composed of Each colored portion has a vertically long rectangular shape (not shown) when viewed in plan.
- the color filter 24 configures a colored portion group by alternately arranging the colored portions that respectively exhibit red, green, and blue along the row direction (X-axis direction), and the colored portion group is arranged in the column direction (Y-axis). In the direction).
- the colored portions adjacent to each other in the display area AA are partitioned by a grid-like portion in the light shielding portion 25, thereby preventing color mixture between the pixel portions PX.
- the metal film 46 is laminated on the upper layer side of the light-shielding portion 25, and in the display area AA, a horizontal stripe shape so as to overlap with a portion extending along the X-axis direction among the lattice-shaped portions of the light-shielding portion 25. With this pattern, the drive electrode 39 is configured (FIG. 14).
- portions disposed in the non-display area NAA constitute a position detection wiring portion 40, a CF substrate side contact portion 42, and a dummy wiring portion 47.
- the planarizing film 26 is laminated on the upper side of the light shielding portion 25, the color filter 24, and the metal film 46, and has a solid pattern extending over the display area AA and the non-display area NAA. It is made of an acrylic resin material such as polymethyl methacrylate resin (PMMA).
- PMMA polymethyl methacrylate resin
- the planarizing film 26 has a film thickness larger than that of the color filter 24, the light-shielding portion 25, and the metal film 46, so that the surface of the CF substrate 11a on the liquid crystal layer 11c side (the surface on which the alignment film is disposed). It is preferably flattened.
- the planarizing film 26 is arranged so as to cover the drive electrode 39 made of the metal film 46, the position detection wiring section 40, and the dummy wiring section 47 from the array substrate 11b side.
- a plurality of floating electrodes arranged along the X-axis direction have the same width except for those located at both ends, whereas the width of those located at both ends is the width of the one located at the center side. For example, it is reduced to about half. For this reason, the difference in capacitance between the detection electrode located closest to the end in the X-axis direction and the detection electrode adjacent thereto is the capacitance between the detection electrodes adjacent to each other on the center side in the X-axis direction. Compared to the difference, it tends to be relatively large.
- the plurality of floating electrodes 45 includes the reference width floating electrode 48 having a reference width (reference width) FW3 and the X-axis direction (second direction).
- the minimum width floating electrode 49 arranged at the end and having the smallest width FW1 and the width FW2 arranged at the end side of the reference width floating electrode 48 in the X-axis direction and at the center side of the minimum width floating electrode 49 in the X-axis direction.
- the intermediate width floating electrode 50 is narrower than the width FW3 of the reference width floating electrode 48 and wider than the width FW1 of the minimum width floating electrode 49.
- the electrostatic capacitance formed between the minimum width floating electrode 49 and the detection electrode 38 adjacent thereto, and the electrostatic capacitance formed between the reference width floating electrode 48 and the detection electrode 38 adjacent thereto are relatively small.
- the floating electrodes 48 to 50 are arranged in the X-axis direction. It is avoided that the capacitance value of the capacitance formed between the plurality of detection electrodes 38 arranged along the line is equalized and an extreme capacitance value difference is generated on the end side in the X-axis direction. Therefore, at the time of position detection, the detection electrode 38 is hardly affected by noise on the end side in the X-axis direction, and the situation where the position detection sensitivity is locally lowered on the end side in the X-axis direction is less likely to occur.
- the floating electrodes 48 to 50 are configured so that the inequality “FW1 ⁇ FW2 ⁇ FW3” relating to the widths FW1 to FW3 is satisfied.
- the floating electrode 45 has the three types of widths FW1 to FW3 as described above, whereas the detection electrode 38 adjacent to the floating electrode 45 in the X-axis direction is shown in FIG. As shown, each width SW is configured to be equal. In this case, if the width of the detection electrode located at the end in the X-axis direction is made wider than the other detection electrodes, the total area of the plurality of floating electrodes is smaller than that in the conventional case. The total area of the plurality of floating electrodes 45 is kept equal to the conventional one.
- the minimum width floating electrode 49 is configured such that its own width FW1 is larger than the half value of the width FW2 of the intermediate width floating electrode 50.
- the width of the floating electrode located at both ends in the X-axis direction is reduced to about half the width of the floating electrode located at the center side.
- the difference between the width FW1 of the minimum width floating electrode 49 and the width FW2 of the intermediate width floating electrode 50 is sufficiently small, so that the capacitance that can occur on the end side in the X-axis direction. The difference in values can be further relaxed. Further, as shown in FIGS.
- the minimum width floating electrodes 49 are arranged one by one in pairs in the X axis direction in the plate surface of the CF substrate 11a.
- the minimum width floating electrode 49 and the intermediate width floating electrode 50 are configured so that the inequality “(FW2 / 2) ⁇ FW1” relating to the widths FW1 and FW2 holds.
- the two intermediate width floating electrodes 50 having the same width FW2 are arranged so as to sandwich the detection electrode 38 in the X-axis direction, two intermediate width floating electrodes having different widths are temporarily arranged.
- the configuration related to the floating electrode 45 is simplified.
- the second and third floating electrodes 45 from the end in the X-axis direction are intermediate width floating electrodes 50 having the same width FW2.
- the two intermediate width floating electrodes 50 are located at the second and third positions from the ends in the X-axis direction among the plurality of floating electrodes 45. Therefore, the reference width floating electrode 48 is located at the fourth and subsequent positions from each end in the X-axis direction among the plurality of floating electrodes 45.
- two intermediate width floating electrodes 50 are arranged in pairs in the X-axis direction at both ends in the plate surface of the CF substrate 11a.
- the detection electrode 38 sandwiched between two reference width floating electrodes 48 in the X-axis direction coincides with the intermediate position of the two reference width floating electrodes 48 in the X-axis direction.
- the detection electrode 38 adjacent to the minimum width floating electrode 49 in the X-axis direction and the detection electrode 38 adjacent to the intermediate width floating electrode 50 in the X-axis direction have their centers in the X-axis direction. Further, they are arranged so as to be eccentric toward the end in the X-axis direction with respect to the intermediate position between the two floating electrodes 45 sandwiching the detection electrode 38.
- the detection electrode 38 (second detection electrode 38 from the left end shown in FIG. 13) sandwiched between the two intermediate width floating electrodes 50 is centered in the X-axis direction at an intermediate position between the two intermediate width floating electrodes 50. On the other hand, it is arranged closer to the end in the X-axis direction.
- the detection electrode 38 (the leftmost detection electrode 38 shown in FIG.
- the detection electrodes 38 adjacent to the intermediate width floating electrode 50 or the minimum width floating electrode 49 in the X-axis direction are arranged so as to be unevenly distributed toward the center with respect to the center of the position detection range in the X-axis direction. It can be said.
- the intermediate width floating electrode 50 has a difference between its own width FW2 and the width FW3 of the reference width floating electrode 48 smaller than the difference between its own width FW2 and the width FW1 of the minimum width floating electrode 49. It is configured as follows. That is, the floating electrodes 48 to 50 are configured so that the inequality “FW3-FW2 ⁇ FW2-FW1” relating to the widths FW1 to FW3 is satisfied. In the present embodiment, the intermediate width floating electrode 50 has a difference between its own width FW2 and the width FW3 of the reference width floating electrode 48, which is half the difference between its own width FW2 and the width FW1 of the minimum width floating electrode 49. It is comprised so that it may become equal to.
- the minimum width floating electrode 49 is configured such that its width FW1 is larger than the width SW of the detection electrode 38. That is, the minimum width floating electrode 49 and the detection electrode 38 are configured such that the inequality “SW ⁇ FW1” relating to the widths FW1 and SW is satisfied.
- the width SW of the detection electrode 38 is about 2000 ⁇ m
- the width FW3 of the reference width floating electrode 48 is about 3000 ⁇ m
- the width FW1 of the minimum width floating electrode 49 is about 2100 ⁇ m, for example.
- the width FW2 of the intermediate width floating electrode 50 is, for example, about 2700 ⁇ m
- the position detection range (sensor pitch) SP in the X-axis direction that each of the plurality of detection electrodes 38 arranged along the X-axis direction takes charge of is For example, it is about 5000 ⁇ m.
- the touch panel pattern (position input device) TPP of the present embodiment extends along the first direction (Y-axis direction) and extends in the second direction (X-axis direction) orthogonal to the first direction.
- a plurality of detection electrodes (first position detection electrodes) 38 arranged side by side and a portion overlapping each of the plurality of detection electrodes 38 in plan view extend in the second direction and include a second direction.
- a plurality of drive electrodes (second position detection electrodes) 39 that are arranged side by side along one direction and form capacitance between the detection electrodes 38 and the plurality of detection electrodes 38 are adjacent to each other in plan view.
- Each with capacitance A plurality of floating electrodes 45 formed, a reference width floating electrode 48 included in the plurality of floating electrodes 45, and included in the plurality of floating electrodes 45 and disposed at the end in the second direction and having the narrowest width FW1.
- An intermediate width floating electrode 50 that is narrower than 48 and wider than the minimum width floating electrode 49.
- the plurality of floating electrodes 45 are arranged on the end side with respect to the reference width floating electrode 48 in the second direction and on the center side with respect to the minimum width floating electrode 49 at the end, and the width FW2 is set as the reference. Since an intermediate width floating electrode 50 narrower than the width floating electrode 48 and wider than the minimum width floating electrode 49 is included, it is formed between each floating electrode 45 and a plurality of detection electrodes 38 arranged in the second direction. It is avoided that the capacitance values of the electrostatic capacitances are equalized and an extreme difference in the capacitance values is generated on the end side in the second direction. As a result, the detection electrode 38 is not easily affected by noise on the end side in the second direction during position detection, and the situation in which the position detection sensitivity is locally lowered on the end side in the second direction is less likely to occur.
- the plurality of detection electrodes 38 are configured so that their widths SW are equal. In this way, the total area of the plurality of floating electrodes 45 is kept equal to that of the conventional case as compared with the case where the width of the detection electrode located at the end in the second direction is relatively wide.
- the minimum width floating electrode 49 is configured such that its own width FW1 is larger than the half value of the width FW2 of the intermediate width floating electrode 50. In this way, the difference between the width FW1 of the minimum width floating electrode 49 and the width FW2 of the intermediate width floating electrode 50 is sufficiently small, so that the capacitance value difference that can occur on the end side in the second direction is reduced. It can be more relaxed.
- At least two intermediate width floating electrodes 50 having the same width FW2 are arranged so as to sandwich the detection electrode 38 in the second direction. In this way, the configuration is simplified as compared with the case where two intermediate width floating electrodes having different widths are arranged.
- the liquid crystal display device (display device with position input function) 10 includes at least the touch panel pattern TPP and a liquid crystal panel (display panel) 11 including the touch panel pattern TPP.
- the liquid crystal panel 11 and the touch panel pattern TPP are provided, the user's position input and the display of the liquid crystal panel 11 can be smoothly coordinated, and the usability This is suitable for improving the above.
- the liquid crystal panel 11 is arranged with an array substrate 11b having at least a TFT (display element) 19 arranged in the display area AA on which an image is displayed, and an array substrate 11b spaced apart from each other.
- the touch panel pattern TPP has a drive electrode 39 provided in the display area AA on the plate surface of the CF substrate 11a facing the array substrate 11b side, whereas the detection electrode 38 has a touch panel pattern TPP.
- the floating electrode 45 are provided in the display area AA on the plate surface of the CF substrate 11a facing away from the array substrate 11b side, so that the liquid crystal panel 11 is integrated.
- the touch panel pattern TPP is integrated with the liquid crystal panel 11, the liquid crystal display device 10 can be compared with a case where the touch panel pattern is provided on a touch panel separate from the liquid crystal panel 11. This is suitable for reducing the thickness and cost.
- the plurality of detection electrodes 138 are arranged at the extreme end in the X-axis direction (second direction) with the reference width detection electrode 51 having a reference width (reference width) SW3.
- the maximum width detection electrode 52 having the widest width SW1 and the width SW2 is arranged closer to the center side than the maximum width detection electrode 52 on the end side with respect to the reference width detection electrode 51 in the X-axis direction.
- the intermediate width detection electrode 53 is wider than the width SW3 of the maximum width detection electrode 52 and narrower than the width SW1 of the maximum width detection electrode 52.
- the capacitance formed between the minimum width floating electrode 149 and the maximum width detection electrode 52 adjacent thereto, and between the reference width floating electrode 148 and the reference width detection electrode 51 adjacent thereto, are used.
- the intermediate width floating electrode 150 and adjacent thereto are relatively small, and is formed between the reference width floating electrode 148 and the reference width detection electrode 51 adjacent thereto.
- the capacitance formed between the intermediate width floating electrode 150 and the adjacent intermediate width detection electrode 53 is relatively small.
- each of the detection electrodes 51 to 53 is arranged in the X-axis direction. It is avoided that the capacitance value of the capacitance formed between the plurality of floating electrodes 148 to 150 arranged along the same is made equal, and an extreme capacitance value difference is generated on the end side in the X-axis direction. Therefore, the detection electrode 138 is less susceptible to noise on the end side in the X-axis direction during position detection, and the situation in which the position detection sensitivity is locally lowered on the end side in the X-axis direction is less likely to occur. .
- Each of the detection electrodes 51 to 53 is configured such that the inequality “SW3 ⁇ SW2 ⁇ SW1” relating to the widths SW1 to SW3 is satisfied.
- one intermediate width detection electrode 53 is provided adjacent to each maximum width detection electrode 52 on the center side in the X-axis direction, and among the plurality of detection electrodes 138, the X-axis It is located second from each end in the direction. Therefore, the reference width detection electrode 51 is located in the third and subsequent positions from each end in the X-axis direction among the plurality of detection electrodes 138. Note that the maximum width detection electrodes 52 are arranged one by one so as to form a pair at both ends in the X-axis direction.
- the intermediate width detection electrode 53 is configured such that the difference between its own width SW2 and the width SW3 of the reference width detection electrode 51 is equal to the difference between its own width SW2 and the width SW1 of the maximum width detection electrode 52.
- the width SW2 of the intermediate width detection electrode 53 is an average value of the width SW3 of the reference width detection electrode 51 and the width SW1 of the maximum width detection electrode 52.
- the capacitance that can be generated on the end side in the X-axis direction by further suitably equalizing the capacitance value of the capacitance formed between the plurality of floating electrodes 145 (148 to 150) arranged in the X-axis direction. The difference in values is further relaxed.
- Two intermediate width floating electrodes 150 included in the plurality of floating electrodes 145 are arranged with two different widths FW5 and FW6 sandwiching the detection electrode 138 in the X-axis direction.
- the intermediate width floating electrode 150 includes a first intermediate width floating electrode 150A having a relatively narrow width FW5 and a second intermediate width floating electrode 150B having a relatively wide width FW6. Yes.
- the first intermediate width floating electrode 150A is positioned second from the left end shown in FIG. 14 among the plurality of floating electrodes 145, and the second intermediate width floating electrode 150B is the figure of the plurality of floating electrodes 145. 14 is located third from the left end.
- the intermediate width detection electrode 53 is sandwiched between the first intermediate width floating electrode 150A and the second intermediate width floating electrode 150B.
- the first intermediate width floating electrode 150A and the second intermediate width floating electrode 150B have widths FW5 and FW6 wider than the width FW4 of the minimum width floating electrode 149 and narrower than the width FW7 of the reference width floating electrode 148. .
- two intermediate widths FW5 and FW6 are different. It is possible to more suitably reduce the difference in capacitance value generated between the intermediate width detection electrode 53 sandwiched between the width floating electrodes 150A and 150B and the maximum width detection electrode 52 adjacent to the minimum width floating electrode 149. it can.
- the floating electrodes 148 to 150 and the detection electrodes 51 to 53 are configured so that the inequality “FW4 ⁇ SW3 ⁇ SW2 ⁇ SW1 ⁇ FW5 ⁇ FW6 ⁇ FW7” relating to the widths FW4 to FW7 and SW1 to SW3 is satisfied. Will be.
- the width SW3 of the reference width detection electrode 51 is, for example, about 2000 ⁇ m
- the width SW1 of the maximum width detection electrode 52 is, for example, about 2400 ⁇ m
- the width SW2 of the intermediate width detection electrode 53 is, for example,
- the width FW7 of the reference width floating electrode 148 is, for example, about 3000 ⁇ m
- the width FW4 of the minimum width floating electrode 149 is, for example, about 1300 ⁇ m
- the width FW5 of the first intermediate width floating electrode 150A is, for example,
- the position detection range (sensor pitch) in the X-axis direction, in which the second intermediate width floating electrode 150B has a width FW6 of about 2900 ⁇ m, for example, and each of the plurality of detection electrodes 138 arranged along the X-axis direction takes charge of. ) SP is, for example, about 5000 ⁇ m.
- the reference width detection electrode 51 included in the plurality of detection electrodes 138 and the second width (X-axis direction) included in the plurality of detection electrodes 138 are arranged at the end.
- the maximum width detection electrode 52 having the widest width SW1 and the plurality of detection electrodes 138 are arranged on the end side of the reference width detection electrode 51 and on the center side of the maximum width detection electrode 52 in the second direction.
- An intermediate width detection electrode 53 having a width SW2 wider than the reference width detection electrode 51 and narrower than the maximum width detection electrode 52 is provided.
- the plurality of detection electrodes 138 are arranged on the end side with respect to the reference width detection electrode 51 in the second direction and are arranged on the center side with respect to the maximum width detection electrode 52 at the extreme end, and the width thereof. Since SW2 is wider than the reference width detection electrode 51 and includes an intermediate width detection electrode 53 narrower than the maximum width detection electrode 52, each of the detection electrodes 138 and a plurality of floating electrodes 145 arranged along the second direction are included. The capacitance values of the capacitances formed between them are more preferably equalized, and the difference between the capacitance values that can occur on the end side in the second direction is further alleviated.
- the intermediate width detection electrode 53 is configured such that the difference between its own width SW2 and the width SW3 of the reference width detection electrode 51 is equal to the difference between its own width SW2 and the width SW1 of the maximum width detection electrode 52. Yes.
- the width SW2 of the intermediate width detection electrode 53 is an average value of the width SW3 of the reference width detection electrode 51 and the width SW1 of the maximum width detection electrode 52, so each detection electrode 138,
- the capacitance value of the capacitance formed between the plurality of floating electrodes 145 arranged in the two directions is more preferably equalized, and the difference between the capacitance values that can occur on the end side in the second direction is further reduced.
- At least two intermediate width floating electrodes 150 having different widths FW5 and FW6 are arranged so as to sandwich the detection electrode 138 in the second direction.
- the detection electrode 138 (sandwiched between two intermediate width floating electrodes 150 having different widths FW5 and FW6 is compared to the case where two intermediate width floating electrodes having the same width are arranged.
- the difference in capacitance value generated between the intermediate width detection electrode 53) and the detection electrode 138 (maximum width detection electrode 52) adjacent to the minimum width floating electrode 149 can be more suitably reduced.
- the specific magnitude relationship between the widths of the floating electrodes and the specific magnitude relationship between the widths of the detection electrodes can be changed as appropriate.
- the detection electrode and the floating electrode are each provided on the outer surface of the CF substrate.
- a configuration in which a cover panel is stacked on the front side of the CF substrate it is also possible to provide either one or both of the detection electrode and the floating electrode on the plate surface of the cover panel on the CF substrate side.
- the drive electrode is provided on the inner surface of the CF substrate.
- the common electrode provided on the inner surface of the array substrate has the same planar configuration as that of the drive electrode described above. It is also possible to perform patterning so that the function of the drive electrode is shared. In that case, a display signal and a position detection signal may be input to the common electrode of the array substrate while being shifted forward and backward in time.
- the pixel electrode and the common electrode are both disposed on the array substrate side, and the pixel electrode and the common electrode overlap with each other with an insulating film interposed therebetween.
- FPS mode liquid crystal panel is exemplified, but a pixel electrode is arranged on the array substrate side, a common electrode is arranged on the CF substrate side, and a liquid crystal layer is interposed between the pixel electrode and the common electrode
- VA mode liquid crystal panel liquid crystal panel
- the present invention can be applied to a so-called IPS mode liquid crystal panel.
- the touch area of the touch panel pattern and the display area of the liquid crystal panel are configured to match each other.
- the touch area of the pattern may be set in a range extending over the entire display area of the liquid crystal panel and a part of the non-display area (a part near the display area).
- the semiconductor film is a CG silicon thin film (polycrystalline silicon thin film)
- CG silicon thin film polycrystalline silicon thin film
- oxide semiconductor or amorphous silicon is used as the material of the semiconductor film. Is also possible.
- the color filter of the liquid crystal panel is exemplified as a three-color configuration of red, green, and blue.
- a yellow colored portion is added to each colored portion of red, green, and blue.
- the present invention can also be applied to a color filter having a four-color configuration.
- a transmissive liquid crystal display device including a backlight device that is an external light source is illustrated.
- the present invention is applied to a reflective liquid crystal display device that performs display using external light.
- the backlight device can be omitted.
- the present invention can also be applied to a transflective liquid crystal display device.
- liquid crystal panel used for various electronic devices is exemplified, but the present invention can also be applied to a liquid crystal panel having a screen size of, for example, 20 inches to 90 inches and classified into a medium size or a large size (very large size).
- the liquid crystal panel can be used for an electronic device such as a television receiver, an electronic signboard (digital signage), or an electronic blackboard.
- the liquid crystal panel having a configuration in which a liquid crystal layer is sandwiched between a pair of substrates has been exemplified.
- the present invention is also applicable to.
- the TFT is used as the switching element of the liquid crystal panel.
- the present invention can be applied to a liquid crystal display device having a liquid crystal panel for monochrome display.
- the liquid crystal display device using the liquid crystal panel as the display panel has been exemplified, but other types of display panels (PDP (plasma display panel), organic EL panel, EPD (electrophoretic display panel)
- PDP plasma display panel
- organic EL panel organic EL panel
- EPD electrotrophoretic display panel
- the present invention can also be applied to display devices using the above. In that case, the backlight device can be omitted.
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Abstract
Description
ところで、複数のセンスラインのうち、最も端に位置するセンスラインに係る静電容量は、それよりも中央側に位置するセンスラインに係る静電容量よりも小さくなる傾向にある。このため、最も端に位置するセンスラインとそれに隣り合うセンスラインとの間の静電容量の差は、中央側において互いに隣り合うセンスラインの間の静電容量の差に比べると、相対的に大きくなる。ここで、上記した特許文献1に記載したように、隣り合うセンスラインの静電容量の差分をとることで位置検出を行うと、最も端に位置するセンスラインとそれに隣り合うセンスラインとの間で静電容量の差分をとる際に大きなノイズが生じてしまい、位置検出感度が局所的に低下するおそれがあった。
本発明の位置入力装置は、第1方向に沿って延在するとともに前記第1方向と直交する第2方向に沿って並んで配される複数の第1位置検出電極と、複数の前記第1位置検出電極に対して平面視においてそれぞれ重畳する部分を含む形で前記第2方向に沿って延在するとともに前記第1方向に沿って並んで配されて前記第1位置検出電極との間で静電容量を形成する複数の第2位置検出電極と、複数の前記第1位置検出電極に対して平面視においてそれぞれ隣り合う形で配されるとともに複数の前記第2位置検出電極に対して平面視において重畳する部分を含む形で配されていて隣り合う前記第1位置検出電極との間と、重畳する前記第2位置検出電極との間と、でそれぞれ静電容量を形成する複数のフローティング電極と、複数の前記フローティング電極に含まれる基準幅フローティング電極と、複数の前記フローティング電極に含まれて前記第2方向について最も端に配されてその幅が最も狭い最小幅フローティング電極と、複数の前記フローティング電極に含まれて前記第2方向について前記基準幅フローティング電極よりも端側で前記最小幅フローティング電極よりも中央側に配されてその幅が前記基準幅フローティング電極よりも狭く前記最小幅フローティング電極よりは広い中間幅フローティング電極と、を備える。
(1)複数の前記第1位置検出電極は、それぞれの幅が等しくなるよう構成されている。このようにすれば、仮に第2方向について端に位置する第1位置検出電極の幅を相対的に広くした場合に比べると、複数のフローティング電極の総面積が従来と同等に保たれる。
(1)前記表示パネルは、画像が表示される表示領域に配される表示素子を少なくとも有するアレイ基板と、前記アレイ基板と対向状をなす形で間隔を空けて配される対向基板と、を備えており、前記位置入力装置は、前記第2位置検出電極が前記対向基板における前記アレイ基板側を向いた板面において前記表示領域に設けられるのに対し、前記第1位置検出電極と前記フローティング電極とが前記対向基板における前記アレイ基板側とは反対側を向いた板面において前記表示領域に設けられることで、前記表示パネルに一体化されている。このようにすれば、位置入力装置が表示パネルに一体化されているので、仮に位置入力装置を表示パネルとは別部品とした場合に比べると、当該位置入力機能付き表示装置の薄型化や低コスト化などを図る上で好適となる。
本発明によれば、位置検出感度の局所的な低下を抑制することができる。
本発明の実施形態1を図1から図13によって説明する。本実施形態では、位置入力機能を備えた液晶表示装置(位置入力機能付き表示装置)10について例示する。なお、各図面の一部にはX軸、Y軸及びZ軸を示しており、各軸方向が各図面で示した方向となるように描かれている。また、上下方向については、図2などを基準とし、且つ同図上側を表側とするとともに同図下側を裏側とする。
本発明の実施形態2を図14によって説明する。この実施形態2では、検出電極138の幅やフローティング電極145の幅を変更したものを示す。なお、上記した実施形態1と同様の構造、作用及び効果について重複する説明は省略する。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)上記した実施形態1では、全ての検出電極の幅が均一化された構成において、X軸方向について両端側に同一幅の中間幅フローティング電極が2つずつ備えられる場合を例示したが、全ての検出電極の幅が均一化された構成において、X軸方向について両端側に同一幅の中間幅フローティング電極が1つずつまたは3つ以上ずつ備えられる構成を採ることも可能である。また、全ての検出電極の幅が均一化された構成において、X軸方向について両端側に異なる幅の中間幅フローティング電極が複数ずつ備えられる構成を採ることも可能である。
Claims (9)
- 第1方向に沿って延在するとともに前記第1方向と直交する第2方向に沿って並んで配される複数の第1位置検出電極と、
複数の前記第1位置検出電極に対して平面視においてそれぞれ重畳する部分を含む形で前記第2方向に沿って延在するとともに前記第1方向に沿って並んで配されて前記第1位置検出電極との間で静電容量を形成する複数の第2位置検出電極と、
複数の前記第1位置検出電極に対して平面視においてそれぞれ隣り合う形で配されるとともに複数の前記第2位置検出電極に対して平面視において重畳する部分を含む形で配されていて隣り合う前記第1位置検出電極との間と、重畳する前記第2位置検出電極との間と、でそれぞれ静電容量を形成する複数のフローティング電極と、
複数の前記フローティング電極に含まれる基準幅フローティング電極と、
複数の前記フローティング電極に含まれて前記第2方向について最も端に配されてその幅が最も狭い最小幅フローティング電極と、
複数の前記フローティング電極に含まれて前記第2方向について前記基準幅フローティング電極よりも端側で前記最小幅フローティング電極よりも中央側に配されてその幅が前記基準幅フローティング電極よりも狭く前記最小幅フローティング電極よりは広い中間幅フローティング電極と、を備える位置入力装置。 - 複数の前記第1位置検出電極は、それぞれの幅が等しくなるよう構成されている請求項1記載の位置入力装置。
- 前記最小幅フローティング電極は、自身の幅が前記中間幅フローティング電極の幅の半値よりも大きくなるよう構成されている請求項2記載の位置入力装置。
- 前記中間幅フローティング電極は、幅が等しくなるものが前記第2方向について前記第1位置検出電極を挟む形で少なくとも2つ配されている請求項2または請求項3記載の位置入力装置。
- 複数の前記第1位置検出電極に含まれる基準幅第1位置検出電極と、
複数の前記第1位置検出電極に含まれて前記第2方向について最も端に配されてその幅が最も広い最大幅第1位置検出電極と、
複数の前記第1位置検出電極に含まれて前記第2方向について前記基準幅第1位置検出電極よりも端側で前記最大幅第1位置検出電極よりも中央側に配されてその幅が前記基準幅第1位置検出電極よりも広く前記最大幅第1位置検出電極よりは狭い中間幅第1位置検出電極と、を備える請求項1記載の位置入力装置。 - 前記中間幅第1位置検出電極は、自身の幅と前記基準幅第1位置検出電極の幅との差が、自身の幅と前記最大幅第1位置検出電極の幅との差と等しくなるよう構成されている請求項5記載の位置入力装置。
- 前記中間幅フローティング電極は、幅が異なるものが前記第2方向について前記第1位置検出電極を挟む形で少なくとも2つ配されている請求項5または請求項6記載の位置入力装置。
- 請求項1から請求項7のいずれか1項に記載の位置入力装置と、前記位置入力装置を備える表示パネルと、を少なくとも備える位置入力機能付き表示装置。
- 前記表示パネルは、画像が表示される表示領域に配される表示素子を少なくとも有するアレイ基板と、前記アレイ基板と対向状をなす形で間隔を空けて配される対向基板と、を備えており、
前記位置入力装置は、前記第2位置検出電極が前記対向基板における前記アレイ基板側を向いた板面において前記表示領域に設けられるのに対し、前記第1位置検出電極と前記フローティング電極とが前記対向基板における前記アレイ基板側とは反対側を向いた板面において前記表示領域に設けられることで、前記表示パネルに一体化されている請求項8記載の位置入力機能付き表示装置。
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KR102309163B1 (ko) * | 2015-01-07 | 2021-10-06 | 삼성디스플레이 주식회사 | 터치 센서 장치 및 이를 포함하는 표시 장치 |
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2016
- 2016-06-03 WO PCT/JP2016/066582 patent/WO2016199691A1/ja active Application Filing
- 2016-06-03 US US15/580,378 patent/US10203808B2/en active Active
- 2016-06-03 JP JP2017523616A patent/JP6411652B2/ja not_active Expired - Fee Related
- 2016-06-03 CN CN201680033104.XA patent/CN107636581A/zh active Pending
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US20130049771A1 (en) * | 2011-08-24 | 2013-02-28 | Tao Peng | Edge accuracy in a capacitive sense array |
JP2013084166A (ja) * | 2011-10-12 | 2013-05-09 | Mitsubishi Electric Corp | タッチパネルおよびそれを備える表示装置 |
JP2015035205A (ja) * | 2013-07-08 | 2015-02-19 | 凸版印刷株式会社 | タッチセンサ用電極、タッチパネル、および、表示装置 |
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WO2018212034A1 (ja) * | 2017-05-16 | 2018-11-22 | シャープ株式会社 | 位置入力機能付き表示装置 |
Also Published As
Publication number | Publication date |
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US20180136785A1 (en) | 2018-05-17 |
CN107636581A (zh) | 2018-01-26 |
US10203808B2 (en) | 2019-02-12 |
JPWO2016199691A1 (ja) | 2018-03-15 |
JP6411652B2 (ja) | 2018-10-24 |
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