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WO2012046627A1 - Dispositif d'affichage équipé d'un écran tactile - Google Patents

Dispositif d'affichage équipé d'un écran tactile Download PDF

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Publication number
WO2012046627A1
WO2012046627A1 PCT/JP2011/072389 JP2011072389W WO2012046627A1 WO 2012046627 A1 WO2012046627 A1 WO 2012046627A1 JP 2011072389 W JP2011072389 W JP 2011072389W WO 2012046627 A1 WO2012046627 A1 WO 2012046627A1
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WO
WIPO (PCT)
Prior art keywords
touch panel
electrode
bridge portion
bridge
pixels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/072389
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English (en)
Japanese (ja)
Inventor
聖 中原
安弘 小原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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Filing date
Publication date
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Publication of WO2012046627A1 publication Critical patent/WO2012046627A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06—COMPUTING OR CALCULATING; 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 display device with a touch panel provided with a touch panel capable of detecting a touch position on an operation surface.
  • a display device with a touch panel including a touch panel capable of detecting a position touched by a pen or a finger on the operation surface, that is, a touch position.
  • a touch panel as disclosed in, for example, Japanese Patent Application Laid-Open No. 2009-53894, an electrode extending in a first direction on a substrate and a second direction intersecting the first direction are extended.
  • a plurality of existing electrodes are arranged.
  • the electrodes extending in the first direction are integrally formed.
  • the electrodes extending in the second direction have electrode pads (pad portions) electrically connected to each other by a bridge portion (relay electrode). The bridge portion is provided so as to straddle the electrode extending in the first direction.
  • a finger touching the touch panel is disposed between the electrode extending in the first direction and the electrode extending in the second direction.
  • Capacitances are respectively formed.
  • the touch position of an operation surface is detectable by detecting the capacitance difference of these electrostatic capacitances. That is, the configuration disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2009-53894 is a so-called capacitance type touch panel.
  • the bridge portion is easily visually recognized. That is, generally, the electrodes of the touch panel are made of a transparent conductive film material, but the bridge portion is made of a metal material such as an aluminum alloy that is the same as the wiring. Therefore, the bridge portion is easily visually recognized by the observer.
  • the bridge portion of the touch panel is easily visually recognized as a portion where no color is displayed, similarly to the light shielding portion provided in the display panel.
  • An object of the present invention is to obtain a configuration in which a bridge portion connecting electrode pads is not easily seen in a display device with a touch panel provided with a touch panel configured to be able to detect a touch position on an operation surface.
  • a display device with a touch panel includes a display panel capable of displaying an image, and a touch panel superimposed on the display panel, and the display panel includes pixels of different colors in at least one direction.
  • a plurality of color pixels are arranged side by side, and the touch panel intersects a substrate, a first electrode formed on the substrate so as to extend in a certain direction, and the first electrode.
  • a second electrode formed so as to extend in a direction, and the second electrode includes a plurality of second electrode pads arranged so as to sandwich the first electrode, and the second electrode pads, A bridge portion that is electrically connected across the first electrode, and the bridge portion extends in one direction among the adjacently arranged pixels when viewed from the viewing side.
  • the display device with a touch panel can make it difficult to visually recognize the bridge portion that connects the electrode pads.
  • FIG. 1 is a cross-sectional view schematically illustrating a configuration of a liquid crystal display device with a touch panel including a touch panel according to an embodiment.
  • FIG. 2 is a plan view showing a schematic configuration of the touch panel.
  • FIG. 3 is a diagram schematically showing the configuration of the liquid crystal panel.
  • FIG. 4 is a cross-sectional view showing a schematic configuration of the liquid crystal panel.
  • FIG. 5 is a plan view showing a schematic configuration of the X-direction electrode pad.
  • FIG. 6 is a plan view showing a configuration of a bridge portion that connects the X-direction electrode pads.
  • 7 is a cross-sectional view taken along line VII-VII in FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG.
  • FIG. 9 is a diagram illustrating an example of the positional relationship between the color filter layer and the bridge portion of the touch panel.
  • FIG. 10 is a diagram illustrating an example of the positional relationship between the gate wiring and the bridge portion of the touch panel in a liquid crystal display device with a touch panel according to another embodiment.
  • a display device with a touch panel includes a display panel capable of displaying an image, and a touch panel superimposed on the display panel, and the display panel includes pixels of different colors in at least one direction.
  • a plurality of color pixels are arranged side by side, and the touch panel intersects a substrate, a first electrode formed on the substrate so as to extend in a certain direction, and the first electrode.
  • a second electrode formed so as to extend in a direction, and the second electrode includes a plurality of second electrode pads arranged so as to sandwich the first electrode, and the second electrode pads, A bridge portion that is electrically connected across the first electrode, and the bridge portion extends in one direction among the adjacently arranged pixels when viewed from the viewing side.
  • the bridge portion that connects the second electrode pads becomes difficult to see due to the portion that is not displayed on the display panel. That is, the plurality of color pixels provided on the display panel are in a dark state at least one color except when the screen is in a white state. Therefore, as in the above-described configuration, by providing a bridge portion of the touch panel so as to extend in a direction (one direction) in which pixels of a plurality of colors are arranged, at least a part of the bridge portion is formed by a pixel portion in a dark color state. Become invisible. Thereby, it becomes difficult to visually recognize the bridge portion.
  • the pixels of the plurality of colors are provided so that pixels of the same color are arranged in a direction orthogonal to the one direction when viewed from the viewing side (second configuration). .
  • the display panel is provided with a linear light shielding portion between the pixels of the plurality of colors when viewed from the viewing side, and the bridge portion is visually recognized. As viewed from the side, it is preferable to be provided in parallel to the light shielding portion (third configuration).
  • the bridge portion of the touch panel is assimilated with the linear light shielding portion of the display panel, and is difficult to be visually recognized. That is, when viewed from the viewer side, the bridge portion of the touch panel is made parallel to the linear light-shielding portion of the display panel. It is assimilated with the shading part of the display panel which is easy to see. Thereby, it can prevent that only a bridge part is visually recognized.
  • the bridge portion is provided in parallel to the light-shielding portion having the largest width among the light-shielding portions as viewed from the viewing side (fourth configuration).
  • the bridge portion when viewed from the viewing side, the bridge portion can be made more difficult to visually recognize by making it parallel to the widest light shielding portion of the light shielding portions of the display panel. That is, the light-shielding portion having the widest width among the light-shielding portions is more easily viewed by an observer, so that the bridge portion that is assimilated with the light-shielding portion is not easily seen.
  • the light shielding portion is preferably a black matrix provided in the display panel (fifth configuration).
  • the display panel is provided with a black matrix extending linearly so as to cover the wiring and the like. Therefore, when the black matrix is visually recognized by an observer, the bridge portion can be made difficult to visually recognize by configuring the touch panel so that the bridge portion is parallel to the black matrix.
  • the light-shielding portion is a signal wiring provided in the display panel (sixth configuration).
  • the bridge portion is visually recognized by configuring the touch panel so that the bridge portion is parallel to the signal wiring. Can be difficult.
  • FIG. 1 schematic structure of the liquid crystal display device 1 with a touch panel (display device with a touch panel) provided with the touch panel 2 which concerns on one Embodiment of this invention is shown.
  • a liquid crystal display device 1 with a touch panel is configured by superimposing a touch panel 2 capable of detecting a touch position on a liquid crystal panel 3 (display panel) capable of displaying an image.
  • reference numeral 4 denotes a backlight.
  • illustration of a cover glass or the like covering the surface of the touch panel 2 opposite to the liquid crystal panel 3 (operation surface side, viewing side) is omitted.
  • FIG. 1 schematically shows a configuration of a liquid crystal display device 1 with a touch panel in cross section.
  • the touch panel 2 includes a touch electrode 12 arranged on the operation surface so that the position touched on the operation surface can be detected (see FIG. 2).
  • the touch panel 2 of the present embodiment utilizes the fact that capacitance is formed between the touch electrode 12 and the finger touching the operation surface, and the capacitance between the electrode and the finger depending on the touch position. The touch position is determined from the difference. That is, the touch panel 2 of the present embodiment is a so-called capacitance type touch panel.
  • the touch panel 2 includes a substrate 11, a touch electrode 12 formed on one surface side (operation surface side, viewing side) of the substrate 11, and the touch electrode 12. And an insulating layer 13 formed between the substrate 11 and the protective layer 14 for protecting the touch electrode 12.
  • the touch electrode 12 includes a plurality of electrode pads 21a and 22a formed in a substantially square shape and a plurality of electrode pads 21c and 22c formed in a substantially triangular shape.
  • the touch electrode 12 is configured by arranging these electrode pads 21 a, 22 a, 21 c, and 22 c on the entire operation surface of the touch panel 2 at substantially equal intervals.
  • the touch electrode 12 includes an X direction electrode 22 (second electrode) extending in the X direction and a Y direction electrode 21 (first electrode) extending in the Y direction (constant direction) (see FIG. 2).
  • These X direction electrode 22 and Y direction electrode 21 are comprised with the electroconductive material which has translucency, such as ITO (indium tin oxide). Note that, as shown in FIG. 2, the X direction and the Y direction intersect each other.
  • the liquid crystal panel 3 has a plurality of pixels 40 arranged in a matrix.
  • a source line 43, a gate line 44, and a CS line 45 are connected to each pixel 40 of the liquid crystal panel 3.
  • the source wiring 43 is connected to the source driving circuit 51 and supplies a signal output from the source driving circuit 51 to the TFT 41 in each pixel 40.
  • the gate wiring 44 is connected to the gate drive circuit 52 and supplies a signal output from the gate drive circuit 52 to the TFT 41 in each pixel 40.
  • the CS wiring 45 is connected to an auxiliary capacitor described later, and supplies a signal from the CS drive circuit 53 to the auxiliary capacitor.
  • the source drive circuit 51, the gate drive circuit 52, and the CS drive circuit 53 are connected to the control unit 54, and in accordance with a signal output from the control unit 54, the source wiring 43, the gate wiring 44, and the CS wiring are provided. 45 is configured to output a signal. Therefore, the source wiring 43, the gate wiring 44, and the CS wiring 45 constitute a signal wiring.
  • the liquid crystal panel 3 includes an active matrix substrate 31 and a counter substrate 32 disposed to face the active matrix substrate 31 as schematically shown in a sectional structure in FIG.
  • the liquid crystal panel 3 includes a liquid crystal layer 33 between the active matrix substrate 31 and the counter substrate 32.
  • the area where the liquid crystal layer 33 is provided and the liquid crystal can be controlled constitutes a display area of the liquid crystal panel 3.
  • the liquid crystal layer 33 may be any type of liquid crystal as long as it can display an image by controlling the liquid crystal, and the operation mode of the liquid crystal may be any mode.
  • a pair of polarizing plates is attached to the liquid crystal panel 3 so as to sandwich the active matrix substrate 31 and the counter substrate 32 therebetween.
  • a transparent substrate 31a such as a glass substrate
  • a plurality of TFTs (Thin Film Transistors) 41, a pixel electrode 42 and a plurality of wirings (a source wiring 43, a gate wiring 44 shown in FIG. CS wiring 45 etc.) is provided on a transparent substrate 31a such as a glass substrate.
  • TFTs Thin Film Transistors
  • a pixel electrode 42 a plurality of wirings (a source wiring 43, a gate wiring 44 shown in FIG. CS wiring 45 etc.) is provided.
  • Each of the wirings 43 to 45 is made of an aluminum alloy or the like and causes reflection on the surface thereof. Note that the configuration of the TFT is the same as the conventional one, and the description thereof is omitted.
  • the pixel electrode 42 is a transparent electrode, and is formed of a light-transmitting conductive material such as ITO (indium tin oxide).
  • the pixel electrodes 42 are arranged so as to be separated from each other for each pixel.
  • the pixel electrode 42 defines a pixel as a unit of image display.
  • the source electrode, the gate electrode, and the drain electrode of the TFT 41 are connected to the source wiring 43, the gate wiring 44, and the pixel electrode 42, respectively.
  • the point that a signal is input to the TFT 41 via the gate wiring 44 and the source wiring 43 and the TFT 41 is driven is the same as that of the conventional display device, and thus detailed description is omitted.
  • a pixel capacitor and an auxiliary capacitor are connected to the drain side of the TFT 41.
  • the auxiliary capacitor is provided in parallel to the pixel capacitor and functions to suppress a change in the potential of the pixel capacitor due to a liquid crystal leakage current or the like.
  • the CS wiring 45 is connected to this auxiliary capacitor.
  • an insulating layer 46 is provided between the transparent substrate 31a and the pixel electrode.
  • the counter substrate 32 is provided with a counter electrode 61 made of a transparent conductive film such as ITO on a transparent substrate 32a such as a glass substrate.
  • black matrices 62 and 64 (light shielding portions) for covering the TFT 41, the gate wiring 44 and the like are provided on the counter electrode 61.
  • the black matrices 62 and 64 are usually formed in the same layer as the color filter layer 63.
  • the black matrix 62 covers and hides the TFT 41, the gate wiring 44, and the CS wiring 45.
  • the black matrix 64 covers and hides the source wiring 43.
  • a portion not covered by these black matrices 62 and 64 is a pixel opening. That is, the black matrixes 62 and 64 constitute a light shielding portion of the display area of the liquid crystal panel 3.
  • the color filter layer 63 has three color filters 63r, 63g, and 63b (a plurality of color filters) of red, green, and blue. These color filters 63r, 63g, and 63b are repeatedly arranged in one direction in the plane (X direction in FIG. 9) in the order of red, green, and blue.
  • the color filters 63r, 63g, and 63b constitute a part of each pixel 40 described above. That is, each pixel 40 has any one of these color filters 63r, 63g, and 63b, and the color of the pixel is defined by the color filter.
  • the color filters 63r, 63g, 63b are also arranged in a direction (Y direction in FIG. 9) perpendicular to the one direction.
  • color filters 63r, 63g, and 63b are provided on the entire surface of the color filter layer 63.
  • the color filters 63r, 63g, and 63b are arranged in the order of red, green, and blue in the X direction, but color filters of the same color are arranged in the Y direction.
  • the color filter layer 63 is formed so that the above-described TFT 41, gate wiring 43, and CS wiring 45 are positioned between the color filters 63r, 63g, and 63b arranged in the Y direction.
  • the TFT 41, the gate wiring 43, and the CS wiring 45 are covered with the black matrix 62, a linear black line extending in the X direction is provided between the color filters 63r, 63g, and 63b arranged in the Y direction.
  • a matrix 62 is provided. In FIG. 9, although not a cross section, the region of the black matrix 62 is indicated by hatching.
  • the color filter layer 63 is formed so that the source wiring 43 is positioned between the color filters 63r, 63g, and 63b arranged in the X direction.
  • a linear black matrix 64 extending in the Y direction is provided between 63r, 63g, and 63b arranged in the X direction.
  • the width of the black matrix 64 is smaller than the width of the black matrix 62 described above.
  • the touch panel 2 includes the substrate 11, the touch electrode 12, the insulating layer 13, and the protective layer 14 (see FIGS. 7 and 8).
  • the touch electrode 12 has the X direction electrode 22 extended in the X direction of FIG. 2, and the Y direction electrode 21 extended in a Y direction.
  • These X direction electrode 22 and Y direction electrode 21 are both made of a transparent conductive film material such as ITO.
  • the Y-direction electrode 21 is formed by integrally forming a substantially square Y-direction electrode pad 21a in plan view and a connection portion 21b for connecting the Y-direction electrode pads 21a. That is, the Y-direction electrode 21 has a shape that is long in the Y direction in FIG.
  • the Y-direction electrode 21 is such that the corner portions of the Y-direction electrode pad 21a are connected by the connecting portion 21b in a state where the plurality of Y-direction electrode pads 21a are arranged so that the diagonal line coincides with the Y-direction.
  • the Y direction electrode 21 is formed such that a plurality of Y direction electrode pads 21a are arranged at equal intervals in the Y direction.
  • a plurality of Y direction electrodes 21 are provided side by side in the X direction.
  • a substantially triangular Y-direction electrode pad 21c is provided at both ends in the longitudinal direction of the Y-direction electrode 21 in plan view. That is, the Y-direction electrode pads 21c located at both ends in the longitudinal direction of the Y-direction electrode 21 are approximately half the size of the other Y-direction electrode pads 21a.
  • the X-direction electrode 22 has a substantially rectangular shape like the Y-direction electrode pad 21a described above and has an X-direction electrode pad 22a (second electrode) having the same size as the Y-direction electrode pad 21a. Pad) and a bridge portion 23 for connecting the X-direction electrode pads 22a to each other.
  • the X-direction electrode 22 is configured by connecting the corner portions of a plurality of X-direction electrode pads 22 a arranged so that the diagonal line coincides with the X direction by the bridge portion 23.
  • the X-direction electrode 22 is provided with substantially triangular X-direction electrode pads 22c at both longitudinal ends. . That is, the X-direction electrode pads 22c located at both ends in the longitudinal direction of the X-direction electrode 22 are approximately half the size of the other X-direction electrode pads 22a.
  • the X-direction electrode pads 22 a and 22 c of the X-direction electrode 22 are connected to the adjacent X-direction electrode pads 22 a and 22 c with the Y-direction electrode 21 interposed therebetween by the bridge portion 23.
  • the bridge portion 23 that connects the X-direction electrode pads 22 a and 22 c is disposed so as to straddle the connection portion 21 b of the Y-direction electrode 21.
  • the X-direction electrode pads 22a and 22c are made of a transparent conductive material such as ITO, for example, like the Y-direction electrode 21. As shown in FIGS. 5 and 6, the X-direction electrode pad 22 a is provided with an extending portion 22 b for connecting the bridge portion 23 to a pair of opposite corner portions.
  • the extending portion 22b is a rectangular region integrally formed with the X-direction electrode pad 22a. In this way, by providing the extending portion 22b on the X-direction electrode pad 22a, the portion to be joined to the bridge portion 23 (joint portion 23b shown in FIG. 6) is more peripheral than the X-direction electrode pad 22a. Can be positioned on the side.
  • the X-direction electrode pads 22c located at both ends in the longitudinal direction of the X-direction electrode 22 are also provided with the above-described extending portions 22b at the corner portions as in the other X-direction electrode pads 22a (see FIG. 2). ).
  • the bridge portion 23 is configured by laminating a material having a low reflectance such as titanium on the surface of a metal material such as an aluminum alloy. As shown in FIG. 6, the bridge portion 23 is formed on a substantially rectangular connecting portion 23a having a pair of sides parallel to each other when viewed from the normal direction of the substrate 11, and on both sides in the longitudinal direction of the connecting portion 23a. And a joining portion 23b. The connecting portion 23a is formed to have a smaller width than the joint portion 23b. That is, the bridge portion 23 has a shape like a dumbbell.
  • the bridge portion 23 can be made difficult to visually recognize.
  • the joint portion 23b of the bridge portion 23 is joined to the extended portions 22b of the X-direction electrode pads 22a and 22c. Specifically, as will be described later, the joint portion 23b of the bridge portion 23 and the extending portions 22b of the X-direction electrode pads 22a and 22c are electrically connected by the contact hole 13a (see FIG. 7). As described above, by providing the extended portions 22b on the X-direction electrode pads 22a and 22c, the X-direction electrode 22 can be compared with the case where the joint portion 23b of the bridge portion 23 is connected to an electrode without the extended portion 22b. It can be joined to a position on the outer peripheral side.
  • the angle of the X direction electrode is considered in consideration of a dimensional error, a positional deviation, and the like. It is necessary to join the joint part 23b of the bridge part 23 at a position inside the part.
  • the extending portion 22b as described above is provided on the X-direction electrode pads 22a and 22c, and the connecting portion 23b of the bridge portion 12 is bonded to the extending portion 22b, thereby connecting the connecting portion 23b to the X direction. It can be joined to the electrode 22 at the outer peripheral portion of the X-direction electrode 22. Thereby, the length of the connection part 23a of the bridge part 23 can be shortened, and this bridge part 23 can be made difficult to visually recognize.
  • the extending portions 22b of the X-direction electrode pads 22a and 22c are more than the connecting portions 23b so that the connecting portions 23b of the bridge portions 23 are located in the extending portions 22b in plan view. Has a large area. Thereby, even if a dimensional error arises in the X direction electrode 22 or the bridge part 23, the junction part 23b of this bridge part 23 can be more reliably joined with respect to the extension part 22b.
  • the bridge part 23 becomes difficult to visually recognize if the dimension of the width direction of the connection part 23a is 0.25 times or less with respect to the length P of this bridge part 23 whole. More preferably, the widthwise dimension of the connecting portion 23a is 0.05 times or less the entire length P of the bridge portion 23, and more preferably the widthwise dimension of the connecting portion 23a is the bridge portion 23.
  • the total length P is 0.02 to 0.03 times.
  • the length P of the entire bridge portion 23 is a dimension Q between the ends of the extension portions 22a and the ends of the extension portions 22a on the opposite side of the pair of X-direction electrode pads 22a (hereinafter referred to as the X-direction electrode 22). If it is 0.25 times or less with respect to (electrode length), it will become difficult to visually recognize. More preferably, the entire length P of the bridge portion 23 is 0.06 to 0.08 times the electrode length Q of the X-direction electrode 22.
  • the width of the connecting portion 23a of the bridge portion 23 is 12 ⁇ m or less.
  • the connecting portion 23a could not be visually recognized. Therefore, the width of the connecting portion 23a of the bridge portion 23 is preferably 12 ⁇ m or less.
  • the width of the connecting portion 23 a of the bridge portion 23 is preferably smaller than the width of the black matrix 62 having the largest width in the liquid crystal panel 3. By doing so, the connecting portion 23 a of the bridge portion 23 is easily assimilated with the black matrix 62. Thereby, it becomes difficult to visually recognize this connection part 23a.
  • the width of the connecting portion 23a of the bridge portion 23 is more preferably smaller than the width of the black matrix (the black matrix 64 in the present embodiment) having the smallest width of the liquid crystal panel 3.
  • a lead-out wiring 24 is connected to substantially triangular electrodes 21c, 22c located on one end side in the longitudinal direction of the Y-direction electrode 21 and the X-direction electrode 22.
  • the lead wiring 24 is made of a metal material such as an aluminum alloy, for example.
  • the lead-out wiring 24 is formed so that the end opposite to the end connected to the Y-direction electrode 21 and the X-direction electrode 22 gathers on one side of the substrate 11.
  • a terminal 25 for outputting a signal to an external control circuit is formed at the end of the collected lead wiring 24.
  • FIGS. 7 and 8 are a sectional view taken along line VII-VII and a sectional view taken along line VIII-VIII in FIG. 2, respectively.
  • a bridge portion 23 and a lead-out wiring 24 for connecting the X-direction electrodes 22 to each other are provided on the substrate 11. That is, in the present embodiment, the bridge portion 23 and the lead wiring 24 made of the same metal material are formed in the lowermost layer.
  • An insulating layer 13 is formed on the substrate 11, the bridge portion 23, and the lead wiring 24.
  • a Y-direction electrode 21 and an X-direction electrode 22 made of a transparent conductive material such as ITO are formed on the insulating layer 13.
  • the protective layer 14 is provided so that the Y direction electrode 21 and the X direction electrode 22 may be covered.
  • a contact hole 13 a for electrically connecting the X-direction electrode 22 and the bridge portion 23 formed on the substrate 11 is formed.
  • bridging part 23 can be formed as a different layer. Accordingly, a three-dimensional intersection between the connecting portion 21a of the Y-direction electrode 21 and the bridge portion 23 that connects the X-direction electrode pads 22a and 22c becomes possible.
  • the touch panel 2 having the above configuration is connected to the liquid crystal panel 3 so that the bridge portion 23 of the touch panel 2 is parallel to the black matrix 62 of the liquid crystal panel 3 when viewed from the viewing side. Combined. By doing so, the bridge portion 23 of the touch panel 2 and the black matrix 62 of the liquid crystal panel 3 become parallel when viewed from the viewing side.
  • the black matrix 62 is aligned along the direction in which the color filters 63r, 63g, and 63b are arranged in the order of red, green, and blue (the X direction in FIG. 9). Is extended.
  • the bridge portion 23 of the touch panel 2 is arranged in parallel to the black matrix 62, the bridge portion 23 is arranged in a direction in which the color filters 63r, 63g, and 63b are arranged in the order of red, green, and blue. It is arranged to extend. That is, the bridge part 23 of the touch panel 2 is arranged so as to extend in a direction (one direction) in which the pixels 40 of different colors are arranged side by side.
  • the bridge portion 23 of the touch panel 2 is assimilated with the black matrix 62 and visually recognized. It becomes difficult.
  • parallel means not only when the bridge portion 23 of the touch panel 2 and the black matrix 62 of the liquid crystal panel 3 are completely parallel, but also when the bridge portion 23 and the black matrix 62 are assimilated. Includes positional relationships. Specifically, “parallel” includes an angle between an extension line of the bridge portion 23 and the black matrix 62 of 0 degrees to 10 degrees.
  • the bridge portion 23 is arranged along the direction in which the pixels 40 of different colors are arranged side by side (the X direction in FIG. 9), so that the bridge portion 23 is formed by the darkly displayed pixels 40. Can be made difficult to visually recognize. That is, since the portion of the pixel 40 that is darkly displayed on the liquid crystal panel 3 is shielded from light and becomes black, at least a part of the bridge portion 23 is hidden by the portion, and the bridge portion 23 becomes difficult to visually recognize.
  • the color filters of the same color are in a direction (Y direction of FIG. 9) orthogonal to the direction (X direction of FIG. 9) in which the color filters 63r, 63g, 63b of different colors are arranged. When arranged side by side, the dark-colored portion is formed in a line extending in the orthogonal direction. Thereby, since the bridge part 23 of the touch panel 2 is hidden in a wide range, the bridge part 23 becomes less visible.
  • the bridge portion 23 that connects the X-direction electrode pads 22a and 22c is provided so as to extend in the direction in which the pixels 40 (color filters 63r, 63g, and 63b) of a plurality of colors are arranged. Accordingly, at least a part of the bridge portion 23 can be hidden by the pixels 40 displayed in dark color, and the bridge portion 23 can be made difficult to visually recognize.
  • the color filters of the same color are arranged in a direction orthogonal to the direction in which the color filters 63r, 63g, and 63b of a plurality of colors are arranged, the color is displayed in a dark color. Can cover the bridge portion 23 in a wide range.
  • the bridge portion 23 of the touch panel 2 is formed so as to extend in the X direction along the black matrix 62.
  • the bridge portion 23 of the touch panel 2 is parallel to the black matrix 62 of the liquid crystal panel 3 when viewed from the viewing side.
  • the bridge part 23 of the touch panel 2 becomes assimilated with the black matrix 62 of the liquid crystal panel 3, and the bridge part 23 becomes difficult to visually recognize. Therefore, by providing the bridge portion 23 along the black matrix 62, it is possible to make the bridge portion 23 of the touch panel 2 less visible.
  • the bridge portion 23 of the touch panel 2 is made parallel to the black matrix 62 having a larger width among the black matrices 62 and 64 of the liquid crystal panel 3, the bridge portion 23 is easily visible to the observer. It becomes easier to assimilate with 62. Thereby, the bridge part 23 can be made more difficult to visually recognize.
  • the source wiring 43, the gate wiring 44, the CS wiring 45 and the TFT 41 are covered with the black matrices 62 and 64.
  • the source wiring 43, the gate wiring 44, the CS wiring 45, and the TFT 41 may be exposed without being covered with the black matrix.
  • the source wiring 43, the gate wiring 44, and the CS wiring 45 serve as a light-shielding portion, at least one of these wirings 43 to 45 is viewed from the viewing side as a bridge of the touch panel 2. What is necessary is just to arrange
  • the bridge portion 23 may be parallel to any wiring, but it is more preferable to arrange the bridge portion 23 of the touch panel 2 parallel to the widest wiring. preferable.
  • the gate wiring 44 is indicated by hatching.
  • the black matrix 62 is formed so as to extend in the X direction.
  • the black matrix may be formed to extend in a direction other than the X direction. In this case, what is necessary is just to arrange
  • the color filters 63r, 63g, 63b of a plurality of colors are arranged so that the color filters of the same color are arranged in the Y direction in FIG.
  • the present invention is not limited to this, and a configuration in which color filters of the same color are not arranged in the Y direction in FIG. 9 may be used.
  • the color filters 63r, 63g, and 63b of three colors of red, green, and blue are used.
  • two or four or more color filters may be used, or a color filter using colors other than red, green, and blue may be used.
  • the Y-direction electrode pads 21a and 21c and the X-direction electrode pads 22a and 22c are formed in a substantially square shape or a substantially triangular shape, respectively.
  • the Y-direction electrode pad and the X-direction electrode pad may be formed in other shapes such as a polygon or a circle.
  • the extending portion may be provided at a position near the adjacent X-direction electrode pad on the outer peripheral portion of the X-direction electrode pad.
  • the Y-direction electrode pads 21a and 21c and the X-direction electrode pads 22a and 22c are arranged so that the corner portions are close to each other.
  • the Y-direction electrode pads 21a and 21c and the X-th electrode pads 22a and 22c may be arranged so that the sides approach each other.
  • the bridge portion 23 is made of the same metal material as that of the wiring or the like, but may be made of a transparent conductive film material such as ITO. If it carries out like this, it will become difficult to visually recognize the bridge part 23 further.
  • the touch panel 2 may be superimposed on a display panel having another configuration such as an organic EL display or a plasma display.
  • the bridge part 23 should just be provided so that it may extend in the arrangement direction of the pixel of each color in the touch panel 2 similarly to the above-mentioned embodiment.
  • the bridge portion 23 may be provided so as to extend in the arrangement direction of the pixels.
  • the touch panel according to the present invention can be used for a touch panel in which a bridge portion for electrically connecting electrode pads is arranged so as to straddle electrodes provided to extend in a certain direction.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • Liquid Crystal (AREA)

Abstract

La présente invention concerne un écran tactile qui est configuré pour être capable de détecter la position touchée sur une surface de fonctionnement, où des parties faisant pont qui connectent entre elles des pastilles d'électrode sont à peine visibles. Un écran tactile (2) est doté d'un substrat (11), d'électrodes de direction Y (21) (premières électrodes) formées de façon à s'étendre dans une direction sur le substrat (11), et d'électrodes de direction X (22) (secondes électrodes) formées, sur le substrat (11), de façon à s'étendre dans une direction qui croise les électrodes de direction Y (21). Les électrodes de direction X (22) sont pourvues d'une pluralité de pastilles d'électrode de direction X (22a) (pastilles de seconde électrode) disposées de façon à prendre en sandwich les électrodes de direction Y (21), et de parties faisant pont (23) connectant électriquement les pastilles d'électrode de direction X (22a) entre elles en s'étendant au-dessus des électrodes de direction Y (21). Vues du côté de visualisation, les parties faisant pont (23) sont disposées de sorte à s'étendre dans une des directions dans laquelle des pixels (40) ayant des couleurs différentes sont positionnés les uns à côté des autres.
PCT/JP2011/072389 2010-10-08 2011-09-29 Dispositif d'affichage équipé d'un écran tactile Ceased WO2012046627A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-228799 2010-10-08
JP2010228799 2010-10-08

Publications (1)

Publication Number Publication Date
WO2012046627A1 true WO2012046627A1 (fr) 2012-04-12

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PCT/JP2011/072389 Ceased WO2012046627A1 (fr) 2010-10-08 2011-09-29 Dispositif d'affichage équipé d'un écran tactile

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Country Link
TW (1) TW201225035A (fr)
WO (1) WO2012046627A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111665986A (zh) * 2020-06-02 2020-09-15 武汉天马微电子有限公司 一种显示面板及显示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007257164A (ja) * 2006-03-22 2007-10-04 Wacom Co Ltd 表示装置、センサパネル、位置検出装置、位置入力装置、および、コンピュータシステム
JP2009230735A (ja) * 2008-03-21 2009-10-08 Elan Microelectronics Corp タッチパネル装置
WO2010095302A1 (fr) * 2009-02-20 2010-08-26 シャープ株式会社 Elément d'affichage et dispositif électrique utilisant celui-ci

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007257164A (ja) * 2006-03-22 2007-10-04 Wacom Co Ltd 表示装置、センサパネル、位置検出装置、位置入力装置、および、コンピュータシステム
JP2009230735A (ja) * 2008-03-21 2009-10-08 Elan Microelectronics Corp タッチパネル装置
WO2010095302A1 (fr) * 2009-02-20 2010-08-26 シャープ株式会社 Elément d'affichage et dispositif électrique utilisant celui-ci

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111665986A (zh) * 2020-06-02 2020-09-15 武汉天马微电子有限公司 一种显示面板及显示装置
CN111665986B (zh) * 2020-06-02 2022-07-01 武汉天马微电子有限公司 一种显示面板及显示装置

Also Published As

Publication number Publication date
TW201225035A (en) 2012-06-16

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