JP7329641B2 - Display device - Google Patents

Description

The present invention relates to display devices.

In recent years, a touch detection device capable of detecting an externally approaching object, which is called a touch panel, has attracted attention. A touch panel is mounted on or integrated with a display device such as a liquid crystal display device and used as a display device with a touch detection function. For example, in the touch screen panel of Patent Document 1, a plurality of detection electrodes are provided in a matrix. In the touch screen panel of Patent Document 1, touch detection of the display area is performed based on changes in the capacitance of the detection electrodes. In a display device with a touch detection function, buttons having an input function are arranged in a peripheral area of a peripheral portion of a display area. Techniques for integrating such input buttons in peripheral regions of touch panels and display devices are known.

U.S. Patent Application Publication No. 2016/0202829

However, Patent Document 1 does not describe touch detection in the peripheral area. Touch detection in the peripheral area may be difficult with the detection electrodes provided in the display area.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device with good detection performance in the peripheral area.

A display device of one embodiment of the present invention includes a substrate, a plurality of first electrodes arranged in a matrix in a display area of the substrate, and a plurality of electrodes arranged in a peripheral area outside the display area of the substrate. a second electrode; a driving unit that supplies a driving signal to the first electrode and the second electrode; and a plurality of wirings connected to each of the plurality of first electrodes, wherein the first electrode is , the wiring is electrically connected to the drive unit, and the first electrode and the second electrode output detection signals according to their respective self-capacitance changes.

A display device of one embodiment of the present invention includes a substrate, a plurality of first electrodes arranged in a matrix in a display area of the substrate, and a peripheral area outside the display area along at least one side of the display area. a second electrode; a driving unit that supplies a driving signal to the second electrode; and wiring connected to each of the plurality of first electrodes; When the drive signal is supplied to the second electrode, the first electrode outputs a detection signal corresponding to a change in capacitance between the first electrode and the second electrode. .

FIG. 1 is a block diagram showing one configuration example of a display device according to the first embodiment. FIG. 2 is an explanatory diagram for explaining the basic principle of mutual capacitive touch detection. FIG. 3 is an explanatory diagram showing an example of an equivalent circuit of mutual capacitance type touch detection. FIG. 4 is a diagram showing an example of waveforms of drive signals and detection signals for mutual capacitance type touch detection. FIG. 5 is an explanatory diagram showing a non-contact state for explaining the basic principle of self-capacitance touch detection. FIG. 6 is an explanatory diagram showing a contact state for explaining the basic principle of self-capacitance touch detection. FIG. 7 is an explanatory diagram showing an example of an equivalent circuit for self-capacitance touch detection. FIG. 8 is a diagram showing an example of waveforms of drive signals and detection signals for self-capacitance touch detection. FIG. 9 is a cross-sectional view showing a schematic cross-sectional structure of the display device according to the first embodiment. FIG. 10 is a circuit diagram showing the pixel arrangement of the display section. 11 is a plan view of the first substrate according to the first embodiment; FIG. 12 is a cross-sectional view taken along line A1-A2 of FIG. 11. FIG. FIG. 13 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the first embodiment. FIG. 14 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the first embodiment. 15 is a schematic diagram showing a connection configuration between first electrodes and an analog front-end circuit in a display device according to a modification of the first embodiment; FIG. 16 is a circuit diagram showing an example of a connection circuit according to a modification of the first embodiment; FIG. FIG. 17 is a circuit diagram showing another example of the connection circuit according to the modification of the first embodiment; FIG. 18 is a plan view of the first substrate according to the second embodiment. FIG. 19 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the second embodiment. FIG. 20 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the second embodiment. FIG. 21 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the second embodiment. FIG. 22 is a plan view of the first substrate according to the third embodiment. FIG. 23 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the third embodiment. FIG. 24 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the third embodiment. FIG. 25 is an explanatory diagram for explaining an operation example of touch detection of the display device according to the third embodiment. FIG. 26 is a cross-sectional view showing a schematic cross-sectional structure of the display device according to the fourth embodiment. FIG. 27 is a plan view of the first substrate according to the fourth embodiment. FIG. 28 is a plan view of a cover substrate according to the fourth embodiment; FIG. 29 is a plan view of the first substrate according to the fifth embodiment. FIG. 30 is a plan view of a cover substrate according to the fifth embodiment; FIG. 31 is a schematic diagram showing the connection configuration between the first electrodes and the analog front-end circuit of the display device according to the sixth embodiment. 32 is a cross-sectional view taken along line B1-B2 of FIG. 31. FIG. FIG. 33 is a cross-sectional view of a display device according to a modification of the sixth embodiment; 34 is a plan view of the first substrate according to the seventh embodiment. FIG. 35 is a plan view of a first substrate according to a first modification of the seventh embodiment; FIG. FIG. 36 is a plan view of a first substrate according to a second modification of the seventh embodiment; FIG. 37 is a plan view of a first substrate according to a third modified example of the seventh embodiment;

A form (embodiment) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited by the contents described in the following embodiments. In addition, the components described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the components described below can be combined as appropriate. It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive appropriate modifications while keeping the gist of the invention are, of course, included in the scope of the present invention. In addition, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part compared to the actual embodiment, but this is only an example, and the interpretation of the present invention is not intended. It is not limited. In addition, in this specification and each figure, the same reference numerals may be given to the same elements as those described above with respect to the existing figures, and detailed description thereof may be omitted as appropriate.

(First embodiment)
FIG. 1 is a block diagram showing one configuration example of a display device according to the first embodiment. As shown in FIG. 1 , the display device 1 includes a display panel 10 , a control section 11 , a gate driver 12 , a source driver 13 , a first electrode driver 14 and a detection section 40 . The display panel 10 includes a display unit 20 that displays an image, and a touch sensor 30 that is a detection device that detects touch input.

The display panel 10 is a display device in which a display unit 20 and a touch sensor 30 are integrated. Specifically, in the display panel 10 , some of the members such as the electrodes and substrate of the display section 20 are also used as the electrodes and substrate of the touch sensor 30 .

The display unit 20 uses a liquid crystal display element as a display element. The display unit 20 includes a plurality of pixels having display elements, and has a display surface facing the plurality of pixels. Further, the display unit 20 receives an input of the video signal Vdisp and displays an image made up of a plurality of pixels on the display surface. Note that the display panel 10 may be a device in which the touch sensor 30 is mounted on the display section 20 . Also, the display unit 20 may be, for example, an organic EL display panel.

The control unit 11 supplies control signals to the gate driver 12, the source driver 13, the first electrode driver 14, and the detection unit 40 based on the video signal Vdisp supplied from the outside. The control unit 11 is a circuit that controls the display operation and detection operation of the display device 1 .

The gate driver 12 supplies the scanning signal Vscan to one horizontal line to be displayed on the display panel 10 based on the control signal supplied from the control unit 11 . As a result, one horizontal line to be driven for display is selected sequentially or simultaneously.

The source driver 13 is a circuit that supplies a pixel signal Vpix to each sub-pixel SPix (see FIG. 10) of the display section 20 . A part of the functions of the source driver 13 may be installed in the display panel 10 . In this case, the control unit 11 may generate the pixel signal Vpix and supply the pixel signal Vpix to the source driver 13 .

The first electrode driver 14 is a circuit that supplies a drive signal Vcomdc for display to the first electrodes COML (see FIG. 11) of the display panel 10 . Further, the first electrode driver 14 supplies a detection drive signal Vcom to the first electrodes COML and the second electrodes 53, 54, and 55 (see FIG. 11) during touch detection.

In the present embodiment, the control unit 11 performs the display operation of displaying by the display unit 20 and the detection operation of detecting the object to be detected by the touch sensor 30 in a time-sharing manner. The first electrode driver 14 supplies drive signals Vcomdc, Vcom to the first electrode COML and the second electrodes 53 , 54 , 55 based on the control signal from the controller 11 .

The touch sensor 30 performs touch detection based on the basic principle of touch detection by a self-capacitance method (also referred to as a self method). The touch sensor 30 outputs a detection signal Vdet<b>2 to the detection unit 40 when detecting the object to be detected in the contact state. The touch sensor 30 can also perform touch detection based on the basic principle of touch detection by a mutual capacitance method (also referred to as a mutual method). The touch sensor 30 outputs a detection signal Vdet<b>1 to the detection unit 40 when detecting the object to be detected in the contact state by the mutual capacitance method.

As used herein, the term “contact state” refers to a state in which the object to be detected is in contact with the display surface or is in close proximity to the display surface. In addition, the “non-contact state” represents a state in which the object to be detected is not in contact with the display surface or is not so close to the display surface as to be equated with contact.

In the mutual capacitance type touch detection, the detection unit 40 detects the surface of the display panel 10 based on the control signal supplied from the control unit 11 and the detection signal Vdet1 output from the display panel 10. This is a circuit that detects whether or not a detection object is touched. Further, in the self-capacitance touch detection, the detection unit 40 detects an image on the display surface of the display panel 10 based on the control signal supplied from the control unit 11 and the detection signal Vdet2 output from the display panel 10 . Detects whether or not the object to be detected is touched. The detection unit 40 obtains the coordinates of the touch input when there is a touch.

The detection unit 40 includes an analog front end circuit 48 , a signal processing unit 44 , a coordinate extraction unit 45 and a detection timing control unit 46 . An analog front end circuit 48 (hereinafter referred to as AFE (Analog Front End) 48 ) includes a detection signal amplification section 42 and an A/D conversion section 43 . The AFE 48 is an analog signal processing circuit that converts the detection signals Vdet1 and Vdet2 into digital signals and outputs the digital signals to the signal processing section 44 . The detection timing control unit 46 controls the A/D conversion unit 43, the signal processing unit 44, and the coordinate extraction unit 45 to operate in synchronization based on the control signal supplied from the control unit 11. FIG.

In touch detection, the detection signal amplifier 42 amplifies the detection signal Vdet1 supplied from the display panel 10 . The A/D converter 43 samples each of the analog signals output from the detection signal amplifier 42 at timing synchronized with the drive signal Vcom and converts them into digital signals.

The signal processing unit 44 is a logic circuit that detects whether or not the display panel 10 is touched based on the output signal of the A/D conversion unit 43 . The signal processing unit 44 performs processing for extracting a signal (absolute value |ΔV|) of the difference between the signals detected by the finger. The signal processing unit 44 compares the absolute value |ΔV| with a predetermined threshold voltage, and if the absolute value |ΔV| . On the other hand, when the absolute value |ΔV| is equal to or greater than the threshold voltage, the signal processing unit 44 determines that the object to be detected is in the contact state or the proximity state. In this manner, the detection unit 40 can perform touch detection.

The coordinate extraction unit 45 is a logic circuit that obtains touch panel coordinates when a touch is detected by the signal processing unit 44 . The coordinate extraction unit 45 outputs the touch panel coordinates as an output signal Vout. The coordinate extraction section 45 may output the output signal Vout to the control section 11 . The control unit 11 can execute a predetermined display operation or detection operation based on the output signal Vout.

The detection signal amplifier 42 , A/D converter 43 , signal processor 44 , coordinate extractor 45 and detection timing controller 46 of the detector 40 are mounted on the display device 1 . However, it is not limited to this, and all or part of the functions of the detection unit 40 may be mounted on an external control board, processor, or the like. For example, the coordinate extractor 45 may be mounted on an external processor separate from the display device 1 . In this case, the detection unit 40 may output the signal processed by the signal processing unit 44 as the output signal Vout. Alternatively, the AFE 48 may be mounted on the display device 1, and the signal processing section 44 and the coordinate extraction section 45 may be mounted on an external processor. In this case, the detection unit 40 may output the digital signal processed by the A/D conversion unit 43 as the output signal Vout.

Next, the basic principle of touch detection by the mutual capacitance method of the display device 1 of the present embodiment will be described with reference to FIGS. 2 to 4. FIG. FIG. 2 is an explanatory diagram for explaining the basic principle of mutual capacitive touch detection. FIG. 3 is an explanatory diagram showing an example of an equivalent circuit of mutual capacitance type touch detection. FIG. 4 is a diagram showing an example of waveforms of drive signals and detection signals for mutual capacitance type touch detection. In the following description, a case in which a finger touches or approaches is described, but the touch is not limited to the finger and may be, for example, a stylus pen.

As shown in FIG. 2, the capacitive element C1 includes a pair of drive electrode E1 and detection electrode E2 arranged opposite to each other with a dielectric D interposed therebetween. The capacitive element C1 has fringes extending from the end of the drive electrode E1 toward the upper surface of the detection electrode E2 in addition to the electric lines of force (not shown) formed between the facing surfaces of the drive electrode E1 and the detection electrode E2. minute electric lines of force are generated. As shown in FIG. 3, one end of the capacitive element C1 is connected to an AC signal source (driving signal source) S, and the other end is connected to the voltage detector DET. The voltage detector DET is, for example, an integrating circuit included in the detection signal amplifying section 42 shown in FIG.

When an AC rectangular wave Sg having a predetermined frequency (for example, several kHz to several hundred kHz) is applied from the AC signal source S to the drive electrode E1 (one end of the capacitive element C1), the voltage detector DET detects the voltage as shown in FIG. An output waveform (detection signal Vdet1) appears as shown in FIG.

In the non-contact state, a current flows according to the capacitance value of the capacitive element C1. The voltage detector DET shown in FIG. 3 converts the current fluctuation corresponding to the AC rectangular wave Sg into a voltage fluctuation (solid-line waveform V ₀ (see FIG. 4)).

As shown in FIGS. 2 and 3, in the contact state, the capacitance C2 formed by the finger is in contact with the detection electrode E2, or is so close that it can be regarded as contact. As a result, the electric lines of force corresponding to the fringe between the drive electrode E1 and the detection electrode E2 are blocked by the conductor (finger). Therefore, the capacitive element C1 acts as a capacitive element having a capacitance value smaller than that in the non-contact state. Then, the voltage detector DET converts the fluctuation of the current _I1 corresponding to the AC rectangular wave Sg into the fluctuation of the voltage (the dotted line waveform _V1 (see FIG. 4)).

In this case, waveform _V1 has a smaller amplitude than waveform _V0 described above. As a result, the absolute value |ΔV| of the voltage difference between the waveform _V0 and the waveform _V1 changes according to the influence of an external object such as a finger that touches or approaches from the outside. The voltage detector DET resets the charge/discharge of the capacitor by switching in the circuit in accordance with the frequency of the AC rectangular wave Sg. By providing such a period Reset, the absolute value |ΔV| of the voltage difference can be accurately detected.

The detection unit 40 compares the absolute value |ΔV| with a predetermined threshold voltage as described above to determine whether the external proximity object is in a non-contact state, a contact state, or a proximity state. Thus, the detection unit 40 can perform touch detection based on the basic principle of mutual capacitance type touch detection.

Next, the basic principle of self-capacitance touch detection will be described with reference to FIGS. 5 to 8. FIG. FIG. 5 is an explanatory diagram showing a non-contact state for explaining the basic principle of self-capacitance touch detection. FIG. 6 is an explanatory diagram showing a contact state for explaining the basic principle of self-capacitance touch detection. FIG. 7 is an explanatory diagram showing an example of an equivalent circuit for self-capacitance touch detection. FIG. 8 is a diagram showing an example of waveforms of drive signals and detection signals for self-capacitance touch detection.

The left diagram of FIG. 5 shows a state in which the switch SW1 connects the power supply Vdd and the detection electrode E3 and the switch SW2 does not connect the detection electrode E3 to the capacitor Ccr in the non-contact state. In this state, the capacitance Cx1 of the detection electrode E3 is charged. The right diagram of FIG. 5 shows a state in which the switch SW1 disconnects the power source Vdd from the detection electrode E3 and the switch SW2 connects the detection electrode E3 to the capacitor Ccr. In this state, the charge of capacitor Cx1 is discharged through capacitor Ccr.

The left diagram of FIG. 6 shows a state in which the switch SW1 connects the power supply Vdd and the detection electrode E3 and the switch SW2 does not connect the detection electrode E3 to the capacitor Ccr in the contact state. In this state, in addition to the capacitance Cx1 of the detection electrode E3, the capacitance Cx2 generated by the finger close to the detection electrode E3 is also charged. The right diagram of FIG. 6 shows a state in which the switch SW1 disconnects the power source Vdd from the detection electrode E3 and the switch SW2 connects the detection electrode E3 to the capacitor Ccr. In this state, the charge of the capacitor Cx1 and the charge of the capacitor Cx2 are discharged through the capacitor Ccr.

Here, with respect to the voltage change characteristic of the capacitor Ccr during discharge (non-contact state) shown in the right diagram of FIG. 5, the voltage change characteristic of the capacitor Ccr during discharge (contact state) shown in the right diagram of FIG. is clearly different due to the presence of Therefore, in the self-capacitance method, the presence or absence of an operation input by a finger or the like is determined by utilizing the fact that the voltage change characteristic of the capacitor Ccr differs depending on the presence or absence of the capacitor Cx2.

Specifically, an AC rectangular wave Sg (see FIG. 8) having a predetermined frequency (for example, several kHz to several hundred kHz) is applied to the detection electrode E3. The voltage detector DET shown in FIG. 7 converts current fluctuations according to the AC rectangular wave Sg into voltage fluctuations (waveforms V ₄ and V ₅ ).

In FIG. 8, the AC rectangular wave Sg rises to a voltage level corresponding to voltage _V6 at time _T01 . At this time, the switch SW1 is turned on and the switch SW2 is turned off, so that the potential of the detection electrode E3 also rises to the voltage _V6 . Next, the switch SW1 is turned off before the timing of time _T11 . At this time, the detection electrode E3 is in a floating state, but the potential of the detection electrode E3 is maintained at voltage _V6 by the capacitance Cx1 (or Cx1+Cx2, see FIG. 6) of the detection electrode E3. Furthermore, the reset operation of the voltage detector DET is performed before the timing of time _T11 .

Subsequently, when the switch SW2 is turned on at time _T11 , the charge accumulated in the capacitor Cx1 (or Cx1+Cx2) of the detection electrode E3 moves to the capacitor C5 in the voltage detector DET. increases (see detection signal Vdet2 in FIG. 8). The output of the voltage detector DET (detection signal Vdet2) in the non-contact state has a waveform _V4 indicated by a solid line, and Vdet2=Cx1× _V6 /C5. In the contact state, the waveform is _V5 indicated by the dotted line, and Vdet2=(Cx1+Cx2)× _V6 /C5.

After that, by turning off the switch SW2 and turning on the switches SW1 and SW3 at time _T31 , the potential of the detection electrode E3 is brought to the same low level as that of the AC rectangular wave Sg, and the voltage detector DET is reset. Let The above operation is repeated at a predetermined frequency (for example, several kHz to several hundred kHz). Thus, the detection unit 40 can perform touch detection based on the basic principle of self-capacitance touch detection.

Next, a configuration example of the display device 1 of this embodiment will be described in detail. FIG. 9 is a cross-sectional view showing a schematic cross-sectional structure of the display panel according to the first embodiment. As shown in FIG. 9, the display device 1 includes a pixel substrate 2, a counter substrate 3, and a liquid crystal layer 6 as a display function layer. The counter substrate 3 is arranged to face the surface of the pixel substrate 2 in a direction perpendicular to it. Also, the liquid crystal layer 6 is provided between the pixel substrate 2 and the counter substrate 3 .

The pixel substrate 2 has a first substrate 21, a pixel electrode 22, a first electrode COML, a second electrode 53, and a polarizing plate 35B. Circuits such as gate scanners included in the gate driver 12, switching elements such as TFTs (Thin Film Transistors), and various wirings such as gate lines GCL and signal lines SGL (not shown in FIG. 9) are provided on the first substrate 21. shown) are provided.

The first electrode COML is provided on the upper side of the first substrate 21 . The pixel electrode 22 is provided above the first electrode COML with the insulating layer 24 interposed therebetween. The pixel electrode 22 is provided in a layer different from that of the first electrode COML, and is arranged so as to overlap with the first electrode COML in plan view. The second electrode 53 is provided in the same layer as the pixel electrode 22 and is provided closer to the outer circumference of the first substrate 21 than the pixel electrode 22 is. In addition, the pixel electrodes 22 are arranged in a matrix in plan view. The polarizing plate 35B is provided below the first substrate 21 . Note that although the example in which the pixel electrode 22 is provided above the first electrode COML has been described in the present embodiment, the present invention is not limited to this. The first electrode COML may be provided above the pixel electrode 22 . That is, the pixel electrode 22 and the first electrode COML are separated from each other in the direction perpendicular to the surface of the first substrate 21 with the insulating layer 24 interposed therebetween, and one of them is above the other.

In this specification, the direction from the first substrate 21 toward the second substrate 31 in the direction perpendicular to the surface of the first substrate 21 is defined as "upper". Also, the direction from the second substrate 31 toward the first substrate 21 is defined as "lower side". In addition, “planar view” indicates the case when viewed from a direction perpendicular to the surface of the first substrate 21 .

The pixel electrodes 22 are provided corresponding to the sub-pixels SPix forming each pixel Pix of the display panel 10 . A pixel signal Vpix for performing a display operation is supplied to the pixel electrode 22 from the source driver 13 (see FIG. 1). Further, during display operation, a display drive signal Vcomdc, which is a DC voltage signal, is supplied to the first electrode COML. Thereby, the first electrode COML functions as a common electrode for the plurality of pixel electrodes 22 . Also, the first electrode COML functions as a detection electrode in touch detection.

In the present embodiment, the pixel electrode 22, the first electrode COML, and the second electrodes 53, 54, 55 (only the second electrode 53 is shown in FIG. 9) have translucency such as ITO (Indium Tin Oxide). A conductive material is used.

The counter substrate 3 has a second substrate 31 , a color filter 32 formed on one surface of the second substrate 31 , and a polarizing plate 35A provided on the other surface of the second substrate 31 . The color filter 32 faces the liquid crystal layer 6 in the direction perpendicular to the first substrate 21 . Note that the color filter 32 may be arranged on the first substrate 21 . In this embodiment, the first substrate 21 and the second substrate 31 are, for example, glass substrates or resin substrates.

The first substrate 21 and the second substrate 31 are arranged facing each other with a predetermined gap therebetween. A liquid crystal layer 6 is provided between the first substrate 21 and the second substrate 31 . The liquid crystal layer 6 modulates the light passing therethrough according to the state of the electric field. As the liquid crystal layer 6, for example, horizontal electric field mode liquid crystal such as IPS (In-Plane Switching) including FFS (Fringe Field Switching) is used. Alignment films (not shown in FIG. 9) are arranged between the liquid crystal layer 6 and the pixel substrate 2 and between the liquid crystal layer 6 and the counter substrate 3 shown in FIG.

An illumination unit (backlight) (not shown) is provided below the first substrate 21 . The lighting section has a light source such as an LED, for example, and emits light from the light source toward the first substrate 21 . Light from the illumination section passes through the pixel substrate 2 and is modulated by the state of the liquid crystal at that position, and the state of transmission to the display surface changes depending on the location. As a result, an image is displayed on the display surface.

Next, the display operation of the display panel 10 will be described. FIG. 10 is a circuit diagram showing the pixel arrangement of the display section according to the embodiment. On the first substrate 21 (see FIG. 9), switching elements Tr, signal lines SGL, gate lines GCL, etc. of each sub-pixel SPix shown in FIG. 10 are formed. The signal line SGL and gate line GCL are electrically connected to the switching element Tr. The switching element Tr is provided at the intersection of the signal line SGL and the gate line GCL. The signal line SGL is a wiring for supplying the pixel signal Vpix to each pixel electrode 22 . The gate line GCL is a wiring for supplying a driving signal for driving each switching element Tr. The signal lines SGL and gate lines GCL extend in a plane parallel to the surface of the first substrate 21 .

The display unit 20 shown in FIG. 10 has a plurality of sub-pixels SPix arranged in a matrix. Each sub-pixel SPix includes a switching element Tr and a liquid crystal element 6a. The switching element Tr is composed of a thin film transistor, and in this example, is composed of an n-channel MOS (Metal Oxide Semiconductor) type TFT. An insulating layer 24 is provided between the pixel electrode 22 and the first electrode COML to form the storage capacitor 6b shown in FIG.

The gate driver 12 shown in FIG. 1 sequentially selects the gate lines GCL. The gate driver 12 applies the scanning signal Vscan to the gate of the switching element Tr of the sub-pixel SPix via the selected gate line GCL. As a result, one row (one horizontal line) of the sub-pixels SPix is sequentially selected as a target for display driving. Also, the source driver 13 supplies the pixel signal Vpix to the selected sub-pixel SPix via the signal line SGL. In these sub-pixels SPix, display is performed one horizontal line at a time according to the supplied pixel signal Vpix.

When performing this display operation, the first electrode driver 14 shown in FIG. 1 applies the display drive signal Vcomdc to the first electrodes COML. The drive signal Vcomdc for display is a voltage signal that becomes a common potential for a plurality of sub-pixels SPix. Thereby, each first electrode COML functions as a common electrode for the pixel electrodes 22 in the display operation. During display, the first electrode driver 14 applies the drive signal Vcomdc to all the first electrodes COML in the display area Ad (see FIG. 11).

As for the color filter 32 shown in FIG. 9, for example, color regions of the color filter 32 colored in three colors of red (R), green (G), and blue (B) may be arranged periodically. Each sub-pixel SPix shown in FIG. 10 described above is associated with one set of color regions 32R, 32G, and 32B of three colors of R, G, and B. In FIG. A pixel Pix is composed of a set of sub-pixels SPix corresponding to the three color regions 32R, 32G, and 32B. Note that the color filter 32 may include color areas of four or more colors.

Next, the configuration of the first electrodes COML and the second electrodes 53, 54, and 55 and the touch detection operation will be described. 11 is a plan view of the first substrate according to the first embodiment; FIG. As shown in FIG. 11, the display device 1 is provided with a display area Ad and a peripheral area Gd. In this specification, the display area Ad is an area for displaying an image, and is an area overlapping with a plurality of pixels Pix (sub-pixels SPix). The peripheral area Gd indicates an area inside the outer periphery of the first substrate 21 and outside the display area Ad. Note that the peripheral area Gd may have a frame shape surrounding the display area Ad, in which case the peripheral area Gd can also be called a frame area.

In this embodiment, a plurality of first electrodes COML are arranged in a matrix in the display area Ad of the first substrate 21 . In other words, a plurality of first electrodes COML are arranged in the first direction Dx, and a plurality of them are arranged in the second direction Dy. The first electrodes COML are arranged over the entire display area Ad. A wiring 27 is connected to each of the first electrodes COML. In the example shown in FIG. 11, the wiring 27 is connected to the first electrodes COML in a one-to-one relationship. The wirings 27 extend in the second direction Dy and are arranged in a plurality with intervals in the first direction Dx. The first electrodes COML are connected to the driver IC 19 through wirings 27, respectively.

In the present embodiment, the first direction Dx is a direction along one side of the display area Ad. The second direction Dy is a direction perpendicular to the first direction Dx. The second direction Dy is not limited to this, and may intersect the first direction Dx at an angle other than 90°. A plane defined by the first direction Dx and the second direction Dy is parallel to the surface of the first substrate 21 . A direction orthogonal to the first direction Dx and the second direction Dy is the thickness direction of the first substrate 21 (see FIG. 9).

A plurality of second electrodes 53, 54, and 55 are arranged in the peripheral region Gd outside the display region Ad. The second electrodes 53, 54, and 55 are provided at positions that do not overlap the first electrodes COML in plan view. The second electrodes 53 are provided in the peripheral region Gd along the second direction Dy, and are arranged in plurality in the second direction Dy. The second electrode 53 has a rectangular shape extending in the second direction Dy. In the present embodiment, the arrangement pitch of the second electrodes 53 in the second direction Dy is equal to the arrangement pitch of the first electrodes COML in the second direction Dy. That is, the second electrodes 53 are arranged adjacent to the first electrodes COML in the first direction Dx. The length of the second electrodes 53 in the second direction Dy is substantially equal to the length of the first electrodes COML in the second direction Dy, and the distance between the second electrodes 53 is the distance between the first electrodes COML in the second direction. It is substantially equal to the spacing of Dy. The length of the second electrode 53 in the first direction Dx is shorter than the length of the first electrode COML in the first direction Dx.

The second electrodes 54 are provided in the peripheral region Gd along the first direction Dx, and are arranged in plurality in the first direction Dx. The second electrode 54 has a rectangular shape extending in the first direction Dx. In this embodiment, the arrangement pitch of the second electrodes 54 is equal to the arrangement pitch of the first electrodes COML in the first direction Dx. The second electrodes 54 are arranged adjacent to the first electrodes COML in the second direction Dy. The length of the second electrodes 54 in the first direction Dx is substantially equal to the length of the first electrodes COML in the first direction Dx. substantially equal to the spacing of Dx. The length of the second electrode 54 in the second direction Dy is shorter than the length of the first electrode COML in the second direction Dy. That is, the arrangement pitch of the second electrodes 53 and 54 is equal to the arrangement pitch of the first electrodes COML in the direction along one side of the peripheral region Gd.

The second electrodes 55 are provided at corners of the peripheral region Gd. The second electrode 55 is arranged adjacent to the end of the second electrode 53 in the second direction Dy and arranged adjacent to the end of the second electrode 54 in the first direction Dx. In this manner, the second electrodes 53, 54, and 55 are provided on four sides of the peripheral region Gd surrounding the plurality of first electrodes COML, and are arranged in a frame shape as a whole. The second electrodes 53 and 54 are not limited to this, and a plurality of second electrodes 53 and 54 may be provided along at least one side of the peripheral region Gd.

As shown in FIG. 11, a flexible substrate 72 is provided in the peripheral region Gd of the first substrate 21 . A driver IC 19 is provided in the peripheral region Gd between the first electrode COML and the flexible substrate 72 .

The second electrodes 53 are each connected to the driver IC 19 via the wiring 28A. The second electrodes 54 are each connected to the driver IC 19 via the wiring 28B. Also, the second electrode 55 is connected to the driver IC 19 via the wiring 28C.

The wiring 27 is provided in a layer different from that of the first electrode COML with an insulating layer (not shown) interposed therebetween, and is provided so as to overlap the first electrode COML in plan view. Also, the wirings 28A, 28B, 28C are provided in a different layer from the second electrodes 53, 54, 55 via an insulating layer (not shown). The wirings 28A and 28C overlap the second electrodes 53 and 55 and extend in the second direction Dy. The wiring 28B connected to the second electrode 54 on the opposite side of the driver IC 19 with respect to the display area Ad overlaps the first electrode COML and extends in the second direction Dy.

The driver IC 19 functions as the controller 11 shown in FIG. Also, the first electrode driver 14 shown in FIG. 1 is included in the driver IC 19 . Also, part of the functions of the detection unit 40 may be included in the driver IC 19, or may be provided as functions of an external MPU (Micro-Processing Unit). For example, AFE 48 is included in driver IC 19 . Without being limited to this, the first electrode driver 14 may be provided on the first substrate 21 or may be provided on an external control substrate. Note that the driver IC 19 is not limited to this, and may be provided on a control board outside the module, for example. In addition to the driver IC 19 , another touch IC 18 (see FIG. 15) may be provided, and the AFE 48 and the like may be mounted on the touch IC 18 .

As an example of the operation method of the display device 1, the display device 1 performs a touch detection operation (touch detection period) and a display operation (display period) in a time division manner. The touch detection operation and the display operation may be performed separately.

In the display operation, the first electrode driver 14 (see FIG. 1) included in the driver IC 19 supplies the drive signal Vcomdc for display to all the first electrodes COML. In self-capacitance touch detection, the first electrode driver 14 simultaneously or time-divisionally supplies the drive signal Vcom to the first electrodes COML. The first electrode COML outputs to the AFE 48 a sensor output signal according to the capacitance change of each of the first electrodes COML. Touch detection of the display area Ad is performed based on the sensor output signal from each first electrode COML. That is, the first electrode COML functions as a common electrode during display operation, and also functions as a detection electrode during touch detection by the self-capacitance method.

In display operation, the first electrode driver 14 (see FIG. 1) included in the driver IC 19 supplies a voltage signal having the same potential as the drive signal Vcomdc for display to all the second electrodes 53, 54, and 55. do. Thereby, the second electrodes 53, 54, 55 function as shield electrodes during display.

Also, in self-capacitance touch detection, the first electrode driver 14 supplies the drive signal Vcom to the second electrodes 53, 54, and 55 simultaneously or in a time division manner. The second electrodes 53 , 54 , 55 output sensor output signals to the AFE 48 in accordance with the respective capacitance changes of the second electrodes 53 , 54 , 55 . Based on the sensor output signals from the second electrodes 53, 54, 55, touch detection of the peripheral area Gd is performed. That is, the second electrodes 53, 54, and 55 are used as detection electrodes of the self-capacitance method.

When the second electrodes 53, 54, 55 are provided in this way, the distance between the object to be detected that contacts or approaches the peripheral region Gd and the second electrodes 53, 54, 55 is the same as that of the object to be detected and the first electrode. It is smaller than the distance to COML. Therefore, the capacitance change of the second electrodes 53, 54, and 55 due to the object to be detected in the peripheral region Gd is increased, and the detection sensitivity of the peripheral region Gd is improved. Therefore, the display device 1 of the present embodiment has good detection performance of the peripheral area Gd.

12 is a cross-sectional view taken along line A1-A2 of FIG. 11. FIG. As shown in FIG. 12, in the display area Ad, a plurality of wirings 27 are provided above the first substrate 21 via an insulating layer 25a and a planarization layer 25b. A first electrode COML is provided above the plurality of wirings 27 with an insulating layer 25c interposed therebetween. A pixel electrode 22 is provided above the first electrode COML with an insulating layer 24 interposed therebetween. One wiring 27 among the plurality of wirings 27 overlapping the first electrode COML is connected to the first electrode COML via the contact hole H1.

In the peripheral region Gd, the second electrode 53 is provided on the insulating layer 24, that is, on the same layer as the pixel electrode 22 and on a layer different from the first electrode COML. Note that another second electrode 53 not shown in FIG. 12 is also provided in the same layer. In other words, the other second electrode 53 is also provided in the same layer as the pixel electrode 22 . The multiple wirings 28A and 28C are provided in the same layer as the multiple wirings 27 . One wiring 28A among the plurality of wirings 28A is connected to the second electrode 53 through the contact hole H2. Wirings 12 a and 12 b are provided between the second electrode 56 and the first substrate 21 in the direction perpendicular to the surface of the first substrate 21 . The wirings 12a and 12b are wirings included in a circuit such as a gate scanner included in the gate driver 12 (see FIG. 1).

The second electrode 53 of the present embodiment can also use a guard ring provided to improve the reliability of display operation as a drive electrode for touch detection. During display operation, the first electrode driver 14 supplies a DC voltage signal having the same potential as the drive signal Vcomdc to the plurality of second electrodes 53 . Thereby, the second electrode 53 can shield noise of various circuits including the wirings 12a and 12b, and improve display reliability.

13 and 14 are explanatory diagrams for explaining an operation example of touch detection of the display device according to the first embodiment. In touch detection, the first electrode COML and the second electrodes 53, 54, 55 may be driven in any way. 13 and 14, an example in which detection is performed in a time division manner for each detection electrode block BK will be described.

As shown in FIG. 13, the first electrode driver 14 (not shown in FIG. 13) included in the driver IC 19 selects the detection electrode block BK1. The detection electrode block BK1 includes a second electrode 54 and a second electrode 55 arranged in the first direction Dx, and a first electrode COML and a second electrode 53 arranged in the first direction Dx. The first electrode driver 14 simultaneously supplies the drive signal Vcom to the first electrodes COML and the second electrodes 53, 54, 55 included in the detection electrode block BK1. The first electrode COML and the second electrodes 53, 54, 55 included in the detection electrode block BK1 output sensor output signals according to their own capacitance changes to the AFE 48 (see FIG. 1). As a result, touch detection is performed in the display area Ad and the peripheral area Gd that overlap with the detection electrode block BK1.

Next, as shown in FIG. 14, the first electrode driver 14 (not shown in FIG. 14) selects the detection electrode block BK2 during a period different from the period during which the detection electrode block BK1 is selected. The detection electrode block BK2 includes first electrodes COML and second electrodes 53 arranged in the first direction Dx and first electrodes COML and second electrodes 53 adjacent to them in the second direction Dy. The first electrode driver 14 simultaneously supplies the drive signal Vcom to the first electrodes COML and the second electrodes 53 included in the detection electrode block BK2. The first electrode COML and the second electrode 53 included in the detection electrode block BK2 output sensor output signals to the AFE 48 in accordance with respective capacitance changes. As a result, touch detection is performed in the display area Ad and the peripheral area Gd that overlap with the detection electrode block BK2.

Then, the first electrode driver 14 sequentially scans the detection electrode block BK including the first electrodes COML and the second electrodes 53, 54, 55 for two lines. Thereby, touch detection of one detection surface is performed. The first electrode driver 14 supplies guard signals to the first electrodes COML and the second electrodes 53, 54, 55 other than the detection electrode block BK. The guard signal is a voltage signal that is synchronized with the drive signal Vcom and has the same potential. As a result, the detection electrode block BK and the non-selected first electrodes COML and second electrodes 53, 54, 55 other than the detection electrode block BK are driven at the same potential. Therefore, the parasitic capacitance of the detection electrode block BK can be suppressed.

Thus, in the present embodiment, the first electrodes COML and the second electrodes 53, 54, 55 form a plurality of detection electrode blocks BK each including a predetermined number of the first electrodes COML and the second electrodes 53, 54, 55. Configure. The first electrode driver 14 supplies drive signals Vcom to the plurality of detection electrode blocks BK in a time division manner. By driving the first electrodes COML and the second electrodes 53, 54, 55 of the detection electrode block BK at the same time, the touch detection in the display area Ad and the touch detection in the peripheral area Gd can be performed at the same time.

In addition, since the detection is performed for each detection electrode block BK, the electrodes connected to the AFE 48 (see FIG. 1) at the same time are less than the case where the first electrodes COML and the second electrodes 53, 54, and 55 are all driven at the same time. can reduce the number of Therefore, the number of terminals of the driver IC 19 on which the AFE 48 is mounted can be reduced.

Note that the operation examples shown in FIGS. 13 and 14 are merely examples, and other driving methods may be used. For example, the first electrode driver 14 may select the first electrodes COML and the second electrodes 53, 54, 55 for one line as the detection electrode block BK. Alternatively, the first electrode driver 14 may select the first electrodes COML and the second electrodes 53, 54, 55 for three or more lines as the detection electrode block BK. The number of electrodes driven simultaneously can be appropriately changed according to the number of channels of the AFE 48 .

(Modification of the first embodiment)
In the first embodiment, an example in which one driver IC 19 is provided in the peripheral region Gd of the first substrate 21 as shown in FIG. 11 has been described, but the present invention is not limited to this. 15 is a schematic diagram showing a connection configuration between first electrodes and an analog front-end circuit in a display device according to a modification of the first embodiment; FIG.

As shown in FIG. 11, a COF (Chip on Film) 75 is connected to the first substrate 21 in the display device 1A of the present embodiment. The flexible substrate 72 is connected to the opposite side of the first substrate 21 with respect to the COF 75 . The COF 75 includes a film-like base material 74 and a driver IC 19 . The driver IC 19 is mounted on the base material 74 . A touch IC 18 is mounted on the flexible substrate 72 . Touch IC 18 includes AFE 48 .

The driver IC 19 mainly controls display operations. Also, the touch IC 18 mainly controls touch detection. That is, the driver IC 19 supplies the drive signal Vcomdc for display to the first electrodes COML. The touch IC 18 supplies a drive signal Vcom for detection to the first electrodes COML and the second electrodes 53 , 54 , 55 .

A connection circuit 17 is provided between the first electrode COML and the COF 75 in the peripheral region Gd of the first substrate 21 . The connection circuit 17 is a connection switching circuit that switches connection and disconnection between the first electrode COML and the AFE 48, and may employ, for example, a multiplexer. Each of the first electrodes COML is connected to the connection circuit 17 via the wiring 27 . Further, the second electrodes 53, 54, 55 are connected to the connection circuit 17 via wirings 28A, 28B, 28C, respectively. The connection circuit 17 is connected to the AFE 48 via the wiring L11. The wiring L<b>11 is provided over the first substrate 21 , the base material 74 and the flexible substrate 72 and is provided at a position not overlapping the driver IC 19 . The connection circuit 17 bundles and connects a plurality of wirings 27 and a plurality of wirings 28A, 28B, and 28C to one wiring L11. Therefore, the number of wires L11 provided on the base material 74 and flexible substrate 72 can be reduced compared to the number of wires 27 and the plurality of wires 28A, 28B, and 28C.

By providing the connection circuit 17 in this way, the number of terminals of the AFE 48 and the touch IC 18 can be reduced compared to a configuration in which all the wiring 27 and the wirings 28A, 28B, and 28C are connected to the AFE 48 and the touch IC 18 . Therefore, the configuration of the touch IC 18 can be simplified, and the chip size can be reduced.

16 is a circuit diagram showing an example of a connection circuit according to a modification of the first embodiment; FIG. Note that FIG. 16 omits the second electrodes 53, 54, 55, the wirings 28A, 28B, 28C, the COF 75, the driver IC 19, the touch IC 18, and the like. As shown in FIG. 16, for example, first electrodes COML(11), COML(12), COML(13), COML(14) are arranged in the second direction Dy. The first electrodes COML(11), COML(12), COML(13), and COML(14) are arranged closer to the AFE 48 in this order. Also, the first electrodes COML(12), COML(22), COML(32), COML(42) are arranged in the first direction Dx in that order. In the following description, it is necessary to distinguish between the first electrodes COML(11), COML(12), COML(13), COML(14), COML(22), COML(32), and COML(42). If not, it is referred to as first electrode COML.

The connection circuit 17 includes switches SW11, SW12, SW13, SW14 and a line L12. The switches SW11, SW12, SW13 and SW14 are provided corresponding to the plurality of first electrodes COML(11), COML(12), COML(13) and COML(14) arranged in the second direction Dy. The switches SW11, SW12, SW13, and SW14 are connected to one wiring L11 via a common wiring L12. The switches SW11, SW12, SW13, SW14 and the wiring L12 are provided for each first electrode COML arranged in the first direction Dx.

The operations of the switches SW11, SW12, SW13, and SW14 are controlled based on control signals from the driver IC 19 (see FIG. 15). In the example shown in FIG. 16, the switch SW12 is turned on, and the switches SW11, SW13, and SW14 are turned off. The first electrodes COML(12), COML(22), COML(32), COML(42) arranged in the first direction Dx are each connected to the AFE 48 via the wiring L11. Thereby, the detection electrode block Rx is selected. The detection electrode blocks Rx are sequentially selected by operating the switches SW11 to SW14 based on the control signal from the driver IC19.

By providing the connection circuit 17 in this manner, the number of wires L11 connected to the AFE 48 becomes equal to the number of first electrodes COML included in one detection electrode block Rx. That is, the number of wirings L11 can be made smaller than the number of wirings 27 respectively connected to the first electrodes COML.

The configuration of the connection circuit 17 shown in FIG. 16 is merely an example, and is not limited to this. FIG. 17 is a circuit diagram showing another example of the connection circuit according to the modification of the first embodiment; The connection circuit 17a shown in FIG. 17 includes switches SW11, SW12, SW13 and SW14 and lines L13, L14, L15 and L16.

The multiple switches SW11 are connected to the AFE 48 via a common wiring L13. The multiple switches SW12 are connected to the AFE 48 via a common wiring L14. The multiple switches SW13 are connected to the AFE 48 via a common wiring L15. The multiple switches SW14 are connected to the AFE 48 via a common wiring L16.

In the example shown in FIG. 17, switches SW11, SW12, SW13, and SW14 are connected to the first electrodes COML (21), COML (22), COML (23), and COML (24) arranged in the second direction Dy, respectively. is turned on. As a result, the first electrodes COML (21), COML (22), COML (23), and COML (24) arranged in the second direction Dy are connected to the AFE 48 through the wirings L13, L14, L15, and L16, respectively. be done. Thereby, the detection electrode block Rx is selected. Based on the control signal from the driver IC 19, the switches SW11 to SW14 are operated for each of the first electrodes COML arranged in the second direction Dy, whereby the detection electrode blocks Rx are sequentially selected along the first direction Dx. be done.

In the configuration of the connection circuit 17a shown in FIG. 17, the arrangement direction of the first electrodes COML included in the detection electrode block Rx can be made different from that in FIG. Also in the example shown in FIG. 17, the number of wires L11 connected to the AFE 48 is equal to the number of first electrodes COML included in one detection electrode block Rx. The number of wirings L11 can be made smaller than the number of wirings 27 respectively connected to the first electrodes COML. Compared to the connection circuit 17a shown in FIG. 17, the connection circuit 17 shown in FIG. 16 does not have the wirings L13, L14, L15, and L16, and is therefore advantageous in narrowing the frame.

(Second embodiment)
FIG. 18 is a plan view of the first substrate according to the second embodiment. In the display device 1B of this embodiment, two second electrodes 53A and 53B and two second electrodes 54A and 54B are provided in the peripheral region Gd. The second electrodes 53A and 53B are long in the second direction Dy. The second electrodes 54A and 54B are long in the first direction Dx.

The second electrode 53A is provided on one long side of the peripheral region Gd, and the second electrode 53B is provided on the other long side of the peripheral region Gd. A first electrode COML is arranged between the two second electrodes 53A and 53B. The second electrodes 53A and 53B are provided adjacent to the plurality of first electrodes COML arranged in the second direction Dy. The length of the second electrodes 53A and 53B in the second direction Dy is preferably equal to or longer than the length of the display area Ad in the second direction Dy. The length of the second electrodes 53A and 53B in the second direction Dy may be shorter than the length of the display area Ad in the second direction Dy. The second electrodes 53A and 53B are connected to the driver IC 19 through wirings 28A, respectively.

The second electrode 54A is provided on one short side of the peripheral region Gd, and the second electrode 54B is provided on the other short side of the peripheral region Gd. The second electrode 54A is provided in the peripheral area Gd at a position farther from the driver IC 19 than the display area Ad. The second electrode 54B is provided in the peripheral area Gd at a position closer to the driver IC 19 than the display area Ad.

A first electrode COML is arranged between the two second electrodes 54A and 54B. The second electrodes 54A and 54B are provided adjacent to the plurality of first electrodes COML arranged in the first direction Dx. The length of the second electrodes 54A and 54B in the first direction Dx is preferably equal to or longer than the length of the display area Ad in the first direction Dx. The length of the second electrodes 54A and 54B in the first direction Dx may be shorter than the length of the display area Ad in the first direction Dx. The second electrodes 54A and 54B are connected to the driver IC 19 through wirings 28B, respectively.

With such a configuration, the second electrodes 53A, 53B and the second electrodes 54A, 54B form capacitance between the respective adjacent first electrodes COML. The second electrodes 53A, 53B and the second electrodes 54A, 54B are provided on four sides of the peripheral region Gd, surrounding the plurality of first electrodes COML. That is, the second electrodes 53A, 53B and the second electrodes 54A, 54B are provided in a frame shape as a whole. In addition, it is not limited to this, and at least one of the second electrodes 53A and 53B and the second electrodes 54A and 54B may be provided along at least one side of the peripheral region Gd. Moreover, it is preferable that the second electrodes 53A and 53B and the second electrodes 54A and 54B are not electrically separated but continuously connected within a range along at least one side of the display area Ad.

In the second embodiment, in the touch detection of the display area Ad, by the self-capacitance type touch detection described in the first embodiment, the display area Ad is detected based on the capacitance change of each first electrode COML. Detect the object to be detected. On the other hand, in the peripheral area Gd, the object to be detected in the peripheral area Gd is detected by mutual capacitance type touch detection. Details are shown below.

19, 20, and 21 are explanatory diagrams for explaining an operation example of touch detection of the display device according to the second embodiment. The display device 1B of the present embodiment performs touch detection on the peripheral area Gd based on changes in capacitance between the second electrodes 53A, 53B, 54A, 54B and the first electrodes COML. Specifically, as shown in FIG. 19, the first electrode driver 14 supplies the drive signal Vcom to the second electrode 54A and the second electrode 54B.

The control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the second electrode 54A among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the first direction Dx adjacent to the second electrodes 54A are referred to as a detection electrode block Rx1. That is, the first electrodes COML of the detection electrode block Rx1 are arranged adjacent to the second electrode 54A along the longitudinal direction of the second electrode 54A. Further, the control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the second electrode 54B among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the first direction Dx adjacent to the second electrodes 54B are referred to as a detection electrode block Rx2. That is, the first electrodes COML of the detection electrode block Rx2 are arranged adjacent to the second electrodes 54B along the longitudinal direction of the second electrodes 54B.

When the drive signal Vcom is supplied to the second electrode 54A, the first electrode COML of the detection electrode block Rx1 outputs to the AFE 48 a sensor output signal according to the capacitance change between the first electrode COML and the second electrode 54A. At the same time, the first electrode COML of the detection electrode block Rx2 outputs to the AFE 48 (see FIG. 1) a sensor output signal corresponding to the change in electrostatic capacitance with the second electrode 54B. Thus, each first electrode COML of the detection electrode block Rx1 and the detection electrode block Rx2 functions as a detection electrode. Therefore, even when the second electrodes 54A and 54B are elongated, the position of the object to be detected can be detected in the area along the short sides of the peripheral area Gd. As described above, touch detection is performed in the peripheral region Gd provided with the second electrode 54A and in the peripheral region Gd provided with the second electrode 54B by the mutual capacitance method.

In this case, the number of first electrodes COML included in the detection electrode block Rx1 and the detection electrode block Rx2 is determined according to the number of channels of the AFE 48 . In the example shown in FIG. 19, eight first electrodes COML are simultaneously connected to the AFE 48 during the same detection period. Not limited to this, seven or less or nine or more first electrodes COML may be connected to the AFE 48 .

Next, as shown in FIG. 20, the first electrode driver 14 supplies the drive signal Vcom to the second electrode 53A. The control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the second electrode 53A among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the second direction Dy adjacent to the second electrodes 53A are referred to as a detection electrode block Rx3.

The detection electrode block Rx3 outputs to the AFE 48 a sensor output signal corresponding to a change in capacitance with the second electrode 53A. Thereby, touch detection is performed on one of the long sides of the peripheral region Gd where the second electrode 53A is provided. In the example shown in FIG. 20, eight first electrodes COML arranged in the second direction Dy are simultaneously connected to the AFE 48 during the same detection period.

Next, as shown in FIG. 21, the first electrode driver 14 supplies the drive signal Vcom to the second electrode 53B. The control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the second electrode 53B among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the second direction Dy adjacent to the second electrodes 53B are referred to as a detection electrode block Rx4.

The detection electrode block Rx4 outputs to the AFE 48 a sensor output signal according to the change in capacitance with the second electrode 53B. Thereby, touch detection is performed on the other long side of the peripheral region Gd where the second electrode 53B is provided. In the example shown in FIG. 21 as well, eight first electrodes COML arranged in the second direction Dy are simultaneously connected to the AFE 48 during the same detection period.

As described above, the plurality of first electrodes COML arranged adjacent to the second electrodes 53A, 53B, 54A, 54B are divided into a plurality of detection electrode blocks Rx1, Rx2, Rx3 each including a predetermined number of first electrodes COML. , Rx4. When the predetermined number is the first number and the total number of the first electrodes COML is the second number, the first number is smaller than the second number. The first electrode driver 14 supplies the drive signal Vcom to the second electrodes 53A, 53B, 54A, 54B simultaneously or in a time division manner. Then, the first electrode COML outputs to the AFE 48 a sensor output signal corresponding to the capacitance change for each of the detection electrode blocks Rx1, Rx2, Rx3, and Rx4. Thereby, the touch detection of the peripheral area Gd is performed by the mutual capacitance method. That is, in the present embodiment, the second electrodes 53A, 53B, 54A, 54B function as drive electrodes, and the first electrodes COML of the detection electrode blocks Rx1, Rx2, Rx3, Rx4 function as detection electrodes. With such a detection operation, the position of the object to be detected in the peripheral area Gd can be detected satisfactorily.

In FIGS. 19 to 21, touch detection is performed in a time division manner for each of eight first electrodes COML, but the present invention is not limited to this. For example, if the AFE 48 has a sufficient number of channels, the detection electrode blocks Rx1, Rx2, Rx3, and Rx4 may include eight or more first electrodes COML, or the second electrodes 53A, 53B, 54A, 54B may be driven at the same time. The detection electrode blocks Rx1, Rx2, Rx3, and Rx4 are composed of the first electrodes COML positioned on the outermost side of the display area Ad, but are not limited to this. The detection electrode blocks Rx1, Rx2, Rx3, and Rx4 may include first electrodes COML arranged inside the display area Ad. Further, in the touch detection of the display area Ad, the object to be detected can be detected based on the capacitance change of each of the first electrodes COML by the self-capacitance method described above.

(Third embodiment)
FIG. 22 is a plan view of the first substrate according to the third embodiment. In the display device 1C of the present embodiment, a frame-shaped second electrode 56 is provided in the peripheral region Gd. The second electrode 56 has a first region 56a, a second region 56b, a third region 56c and a fourth region 56d.

The first region 56a and the second region 56b are long in the second direction Dy. The third region 56c and the fourth region 56d are long in the first direction Dx. The third region 56c connects one end of the first region 56a and one end of the second region 56b. The fourth region 56d connects the other end of the first region 56a and the other end of the second region 56b. In this way, the second electrode 56 is continuously provided over the four sides of the peripheral region Gd and formed in a single continuous frame shape. The second electrode 56 is provided so as to surround the display area Ad. The second electrode 56 is connected to the driver IC 19 via the wiring 28A.

Also in this embodiment, as in the example shown in FIG. 12, in the peripheral region Gd, the second electrode 56 is provided on the insulating layer 24, that is, in the same layer as the pixel electrode 22, and is different from the first electrode COML. provided in different layers. Also, the first region 56a, the second region 56b, the third region 56c, and the fourth region 56d are provided in the same layer as each other, and are provided in the same layer as the pixel electrode 22 .

The second electrode 56 of the present embodiment can also use the guard ring provided to improve the reliability of the display operation as a drive electrode for touch detection. During display operation, the first electrode driver 14 supplies a DC voltage signal having the same potential as the drive signal Vcomdc to the second electrodes 56 . Thereby, the second electrode 56 can shield noise of various circuits including the wirings 12a and 12b, and can improve display reliability.

Also in this embodiment, like the second embodiment, the touch detection of the peripheral area Gd is performed by the mutual capacitance method. 23 to 25 are explanatory diagrams for explaining an operation example of touch detection of the display device according to the third embodiment. The display device 1C of the present embodiment performs touch detection on the peripheral area Gd based on the capacitance change between the second electrode 56 and the first electrode COML. Specifically, as shown in FIG. 23 , the first electrode driver 14 supplies the drive signal Vcom to the second electrode 56 .

The control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the third region 56c among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the first direction Dx adjacent to the third region 56c are referred to as a detection electrode block Rx1. That is, the first electrodes COML of the detection electrode block Rx1 are arranged adjacent to the third region 56c along the longitudinal direction of the third region 56c. Further, the control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the fourth region 56d among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the first direction Dx adjacent to the fourth region 56d are defined as a detection electrode block Rx2. That is, the first electrodes COML of the detection electrode block Rx2 are arranged adjacent to the fourth region 56d along the longitudinal direction of the fourth region 56d.

When the drive signal Vcom is supplied to the second electrode 56, the first electrode COML of the detection electrode block Rx1 outputs to the AFE 48 a sensor output signal according to the capacitance change between the first electrode block Rx1 and the third region 56c. At the same time, the first electrode COML of the detection electrode block Rx2 outputs to the AFE 48 (see FIG. 1) a sensor output signal corresponding to the change in capacitance with the fourth region 56d. Thus, each first electrode COML of the detection electrode block Rx1 and the detection electrode block Rx2 functions as a detection electrode. Therefore, even if the second electrode 56 is frame-shaped, it is possible to detect the position of the object to be detected in the area along the short sides of the peripheral area Gd. As described above, touch detection is performed in the peripheral area Gd provided with the third area 56c and in the peripheral area Gd provided with the fourth area 56d by the mutual capacitance method.

In this case, the number of first electrodes COML included in the detection electrode block Rx1 and the detection electrode block Rx2 is determined according to the number of channels of the AFE 48 . In the example shown in FIG. 23, eight first electrodes COML are simultaneously connected to the AFE 48 during the same detection period. Not limited to this, seven or less or nine or more first electrodes COML may be connected to the AFE 48 .

Next, as shown in FIG. 24 , the first electrode driver 14 supplies the drive signal Vcom to the second electrode 56 . The control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the first region 56a among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the second direction Dy adjacent to the first region 56a are referred to as a detection electrode block Rx3.

The detection electrode block Rx3 outputs to the AFE 48 a sensor output signal according to the change in capacitance with the first region 56a. Thereby, touch detection is performed in the peripheral area Gd where the first area 56a is provided. In the example shown in FIG. 24, eight first electrodes COML arranged in the second direction Dy are simultaneously connected to the AFE 48 during the same detection period.

Next, as shown in FIG. 25 , the first electrode driver 14 supplies the drive signal Vcom to the second electrode 56 . The control unit 11 (see FIG. 1) selects a plurality of first electrodes COML adjacent to the second region 56b among the first electrodes COML as detection targets. Here, a plurality of first electrodes COML arranged in the second direction Dy adjacent to the second region 56b are referred to as a detection electrode block Rx4.

The detection electrode block Rx4 outputs to the AFE 48 a sensor output signal corresponding to the change in capacitance with the second region 56b. Thereby, touch detection is performed in the peripheral region Gd where the second region 56b is provided. In the example shown in FIG. 25 as well, eight first electrodes COML arranged in the second direction Dy are simultaneously connected to the AFE 48 during the same detection period.

As described above, the plurality of first electrodes COML arranged adjacent to the second electrodes 56 form a plurality of detection electrode blocks Rx1, Rx2, Rx3, Rx4 each including a predetermined number of first electrodes COML. The first electrode driver 14 supplies the drive signal Vcom to the second electrode 56 . Then, the first electrode COML outputs to the AFE 48 a sensor output signal corresponding to the capacitance change for each of the detection electrode blocks Rx1, Rx2, Rx3, and Rx4. Thereby, the touch detection of the peripheral area Gd is performed by the mutual capacitance method. That is, in the present embodiment, the second electrodes 56 function as drive electrodes, and the first electrodes COML of the detection electrode blocks Rx1, Rx2, Rx3, and Rx4 function as detection electrodes. With such a detection operation, the position of the object to be detected in the peripheral area Gd can be detected satisfactorily.

In this embodiment, one second electrode 56 is provided in the peripheral region Gd. Therefore, compared to the first and second embodiments, the number of wirings 28A connecting the second electrodes 56 and the driver IC 19 can be reduced, and the number of terminals of the driver IC 19 can be reduced. can be done. Also, the circuit for scanning the second electrode 56 can be omitted.

(Fourth embodiment)
FIG. 26 is a cross-sectional view showing a schematic cross-sectional structure of the display device according to the fourth embodiment. FIG. 27 is a plan view of the first substrate according to the fourth embodiment. FIG. 28 is a plan view of a cover substrate according to the fourth embodiment; As shown in FIG. 26, the display device 1D of this embodiment has a cover substrate 51 in addition to the pixel substrate 2 and the counter substrate 3 . The cover substrate 51 is provided apart from the first substrate 21 in the direction perpendicular to the surface of the first substrate 21 . The cover substrate 51 is arranged on the opposite side of the pixel substrate 2 with respect to the counter substrate 3 . In this embodiment, the cover substrate 51 is also called a third substrate.

The cover substrate 51 is a protective member for covering and protecting the pixel substrate 2 and the counter substrate 3 . The cover substrate 51 may be a glass substrate, or may be a film-like base material using a resin material or the like. The cover substrate 51 has a first surface 51a and a second surface 51b opposite to the first surface 51a. The first surface 51a of the cover substrate 51 is a display surface on which an image is displayed, and is a detection surface with which an object to be detected contacts or approaches. The second surface 51b of the cover substrate 51 faces the opposing substrate 3 and is adhered to the opposing substrate 3 via an adhesive layer (not shown).

In this embodiment, the cover substrate 51 has an outer shape larger than the display panel 10 in plan view. A colored layer 52 is provided on the second surface 51 b of the cover substrate 51 . The colored layer 52 is provided in the peripheral region Gd. Since the colored layer 52 is provided, various circuits such as the gate driver 12 and the source driver 13, wiring, and the like can be prevented from being visually recognized from the outside. The colored layer 52 is, for example, a decorative layer using a colored resin material or a metal material so as to suppress the transmission of light.

In this embodiment, the second electrodes 53</b>C and 53</b>D are provided on the second surface 51 b of the cover substrate 51 so as to overlap the colored layer 52 . That is, the second electrodes 53C and 53D are provided on a layer different from that of the pixel electrode 22 . The second electrodes 53C and 53D function as drive electrodes in touch detection of the peripheral area Gd.

The second electrodes 53C and 53D are not limited to a translucent conductive material such as ITO. The second electrodes 53C and 53D are, for example, one or more metal layers selected from aluminum (Al), copper (Cu), silver (Ag), molybdenum (Mo), chromium (Cr), and tungsten (W). may be formed. The second electrodes 53C and 53D may be formed of an alloy containing one or more selected from these metal materials, or may be a laminate in which a plurality of conductive layers formed of these materials are laminated. .

As shown in FIG. 27, the peripheral region Gd of the first substrate 21 is not provided with the second electrodes 53C and 53D. A plurality of first electrodes COML are arranged in a matrix in the display area Ad of the first substrate 21 . The configuration of the first electrode COML is the same as in the second and third embodiments. That is, also in the present embodiment, touch detection on the display area Ad is performed by the self-capacitance method. Note that the guard ring described in the third embodiment may be provided in the peripheral region Gd of the first substrate 21 .

FIG. 28 shows a plan view of the cover substrate 51 viewed from the first surface 51a. A peripheral region Gd of the cover substrate 51 is provided with second electrodes 53C, 53D and a second electrode 54C. A flexible substrate 73 is provided in the peripheral region Gd of the cover substrate 51 . The flexible substrate 73 is provided at a position overlapping the flexible substrate 72 shown in FIG. Alternatively, it is preferably provided on the same side as the side on which the flexible substrate 72 is provided.

The second electrodes 53C and 53D are elongated and elongated along the second direction Dy. The second electrode 54C has an elongated shape that extends along the first direction Dx. The second electrode 53C is provided on one long side of the peripheral region Gd of the cover substrate 51, and the second electrode 53D is provided on the other long side. Further, the second electrode 54C is provided on the short side of the peripheral region Gd of the cover substrate 51 to which the flexible substrate 73 is connected. The second electrodes 53C and 53D and the second electrode 54C are provided at positions that do not overlap the first electrodes COML in plan view.

The second electrodes 53C and 53D are each electrically connected to the flexible substrate 73 via the wiring L1. The second electrode 54C is electrically connected to the flexible substrate 73 via the wiring L2. The wiring L1 and the wiring L2 are connected to the terminal portion 73A through the wiring L3 provided on the flexible substrate 73. As shown in FIG. A terminal portion 73A of the flexible substrate 73 is connected to a terminal portion 72A of the flexible substrate 72 shown in FIG. The terminal portion 72A is connected to the driver IC 19 via a wiring L4 provided on the flexible substrate 72. FIG. With such a configuration, the second electrodes 53C and 53D and the second electrode 54C provided on the cover substrate 51 are electrically connected to the driver IC 19 .

Also in this embodiment, the second electrodes 53C, 53D and the second electrode 54C form capacitance between the adjacent first electrodes COML in plan view. In the display device 1D of this embodiment, similarly to the second and third embodiments, touch detection of the peripheral area Gd can be performed by the mutual capacitance method.

Specifically, in the touch detection of the peripheral area Gd, the first electrode driver 14 simultaneously or time-divisionally touches the second electrodes 53C, 53D, and the second electrode 54C, similarly to the examples shown in FIGS. It supplies the drive signal Vcom. The control unit 11 (see FIG. 1) selects detection electrode blocks Rx2, Rx3, and Rx4 (see FIGS. 19 to 21) among the plurality of first electrodes COML simultaneously or in a time division manner. In addition, in the present embodiment, the second electrode is not provided in the peripheral region Gd on the opposite side of the second electrode 54C with respect to the display region Ad. Therefore, the detection electrode block Rx1 shown in FIG. 19 is not selected as a detection electrode.

The detection electrode blocks Rx2, Rx3, and Rx4 output sensor output signals to the AFE 48 according to changes in capacitance between the second electrodes 53C, 53D and the second electrode 54C and the second electrode 56. FIG. Thereby, touch detection of the peripheral area Gd can be performed. The first electrodes COML of the detection electrode blocks Rx2, Rx3, and Rx4 each function as detection electrodes. Therefore, the position of the object to be detected in the peripheral area Gd can be detected satisfactorily.

In this embodiment, the cover substrate 51 is provided with the second electrodes 53C, 53D and the second electrode 54C. Therefore, it is advantageous for narrowing the frame of the first substrate 21 . In addition, compared to the second and third embodiments, there are less restrictions on various wirings and circuits provided in the peripheral region Gd of the first substrate 21, so the second electrodes 53C, 53D and the second electrode 54C are less constrained. area can be increased. Therefore, it is possible to improve the detection sensitivity of touch detection in the peripheral area Gd.

(Fifth embodiment)
FIG. 29 is a plan view of the first substrate according to the fifth embodiment. FIG. 30 is a plan view of a cover substrate according to the fifth embodiment; As shown in FIG. 29, the peripheral region Gd of the first substrate 21 is not provided with the second electrode. A plurality of first electrodes COML are arranged in a matrix in the display area Ad of the first substrate 21 . Also in this embodiment, touch detection on the display area Ad is performed by the self-capacitance method. Note that the guard ring described in the third embodiment may be provided in the peripheral region Gd of the first substrate 21 .

In the display device 1</b>E of this embodiment, the second electrode 56</b>A is provided in the peripheral region Gd of the cover substrate 51 . The second electrode 56A is formed in a frame shape as in the third embodiment shown in FIG. That is, the second electrode 56A has a first area 56Aa, a second area 56Ab, a third area 56Ac and a fourth area 56Ad.

The first region 56Aa and the second region 56Ab are long in the second direction Dy. The third region 56Ac and the fourth region 56Ad are long in the first direction Dx. The third region 56Ac connects one end of the first region 56Aa and one end of the second region 56Ab. The fourth region 56Ad connects the other end of the first region 56Aa and the other end of the second region 56Ab. Thus, the second electrode 56A is formed in one continuous frame shape. The second electrode 56A is provided so as to surround the display area Ad.

The second electrode 56A is electrically connected to the flexible substrate 73 via the wiring L5 connected to the fourth region 56Ad. The wiring L5 is connected to the terminal portion 73A through the wiring L6 provided on the flexible substrate 73. As shown in FIG. The terminal portion 73A of the flexible substrate 73 is connected to the terminal portion 72A of the flexible substrate 72 shown in FIG. The terminal portion 72A is connected to the driver IC 19 via a wiring L7 provided on the flexible substrate 72. FIG. With such a configuration, the second electrode 56A provided on the cover substrate 51 is electrically connected to the driver IC 19. As shown in FIG.

Also in this embodiment, the second electrode 56A forms a capacitance between the adjacent first electrodes COML in plan view. Also in the display device 1E of the present embodiment, the touch detection of the peripheral area Gd can be performed by the mutual capacitance method.

Specifically, in the touch detection of the peripheral area Gd, the first electrode driver 14 supplies the drive signal Vcom to the second electrode 56A. 19 to 21, the controller 11 (see FIG. 1) selects the detection electrode blocks Rx1, Rx2, Rx3 and Rx4 simultaneously or in a time division manner. The detection electrode blocks Rx1, Rx2, Rx3, and Rx4 output sensor output signals to the AFE 48 according to changes in capacitance with the second electrode 56A. Thereby, touch detection of the peripheral area Gd can be performed.

In this embodiment, one second electrode 56A is provided in the peripheral region Gd of the cover substrate 51 . Therefore, compared to the fourth embodiment, the number of wires L5 connecting the second electrodes 56A and the flexible substrate 73 can be reduced. Also, the number of wirings L6 and L7 provided on the flexible substrate 73 and the flexible substrate 72 can be reduced. Therefore, the configurations of the flexible substrates 73 and 72 can be simplified.

(Sixth embodiment)
FIG. 31 is a schematic diagram showing the connection configuration between the first electrodes and the analog front-end circuit of the display device according to the sixth embodiment. 32 is a cross-sectional view taken along line B1-B2 of FIG. 31. FIG. Although FIG. 31 omits the second electrode in the peripheral region Gd, it is possible to employ a configuration in which the second electrode is provided on the first substrate 21 as in the first to third embodiments described above. can be done. Alternatively, a configuration in which the second electrode is provided on the cover substrate 51 can be adopted as in the fourth and fifth embodiments.

As shown in FIG. 31, the COF 75 is connected to the first substrate 21 in the display device 1F of this embodiment. The flexible substrate 72 is connected to the opposite side of the first substrate 21 with respect to the COF 75 . The COF 75 includes a film-like base material 74 and a driver IC 19 . The driver IC 19 is mounted on the base material 74 . A touch IC 18 is mounted on the flexible substrate 72 . Touch IC 18 includes AFE 48 .

In the display device 1F of the present embodiment, the wiring L11 is provided at a position overlapping the driver IC19. The wiring L11 passes under the driver IC 19 and connects the connection circuit 17 and the AFE 48 .

As shown in FIG. 32, the driver IC 19 is mounted on the base material 74 via the connecting member 81 . The base material 74 is provided with the wiring L11, the wiring 74B, the pads 74A, and the pads 74C. Pad 74A is provided on wiring 74B and is electrically connected to wiring 74B. The wiring 74B is electrically connected to the first electrode COML. The pad 74C is provided on the wiring L11 and electrically connected to the wiring L11.

The connection member 81 is provided between the pad 74A of the base material 74 and the pad 19A of the driver IC 19. As shown in FIG. The driver IC 19 is thereby electrically connected to the substrate 74 . The wiring L11 is provided under the dummy pad 19B of the driver IC 19 via the connection member 81. As shown in FIG. In this manner, the wiring L11 is provided so as to overlap the driver IC19. With such a configuration, the wiring L11 passes under the driver IC 19 and is connected from the connection circuit 17 to the AFE 48 .

FIG. 33 is a cross-sectional view of a display device according to a modification of the sixth embodiment; In this modified example, the driver IC 19 is not provided with the dummy pads 19B. The wiring L11 is provided between adjacent pads 19A. Even with such a configuration, the wiring L11 passes under the driver IC 19 and is connected from the connection circuit 17 to the AFE 48 . 32 and 33 illustrate the configuration in which the wiring L11 is not electrically connected to the driver IC 19, but the present invention is not limited to this. A configuration in which the wiring L11 is connected to the driver IC 19 and is electrically connected to the touch IC 18 via the circuit or wiring of the driver IC 19 can also be adopted.

(Seventh embodiment)
In the first to sixth embodiments, an example in which the first substrate 21 has a rectangular shape in plan view is shown, but the invention is not limited to this. 34 is a plan view of the first substrate according to the seventh embodiment. FIG. In the display device 1G of this embodiment, the first substrate 21A has an irregular shape in plan view. A corner portion 102 of the first substrate 21A is curved. The corner portion 102 is a portion where an extension line of one side extending in the first direction Dx and an extension line of one side extending in the second direction Dy of the sides of the first substrate 21A intersect. According to the shape of the corner 102, the first electrodes COMLa, COMLb, COMLc, and COMLd arranged at the corner of the display area Ad have outer diameter shapes including curved lines.

A recess 101 is formed on the side of the first substrate 21A that is opposite to the driver IC 19 with respect to the display area Ad. The concave portion 101 curves from the outer periphery of the first substrate 21A toward the display area Ad. The portions of the first electrodes COMLe and COMLf where the recess 101 is provided have an irregular shape corresponding to the shape of the recess 101 . Specifically, the first electrode COMLf has a rectangular shape with a smaller width than the other first electrodes COML. Also, the first electrode COMLe has an outer diameter shape including a curved line that curves inward.

The two first electrodes COMLf and the first electrode COMLf are arranged in the first direction Dx with the recess 101 interposed therebetween. Also, the two first electrodes COMLe and the first electrode COMLe are arranged in the first direction Dx with the end portion of the recess 101 interposed therebetween. In such an irregular-shaped first substrate 21A, it may be difficult to secure the connection between the wiring 27 and the first electrode COML.

As shown in FIG. 34, wiring blocks 127A, 127B, 127C, 127D, 127E, and 127F are provided for each first electrode COML arranged in the second direction Dy. The wiring blocks 127A, 127B, 127C, 127D, 127E and 127F respectively include wirings 27a, 27b, 27c, 27d, 27e, 27f, 27g and 27h. The wirings 27a, 27b, 27c, 27d, 27e, 27f, 27g, and 27h are respectively connected to the first electrodes COML arranged in the second direction Dy. The wirings 27a, 27b, 27c, 27d, 27e, 27f, 27g, and 27h are arranged in this order in the first direction Dx.

In the following description, the wirings 27a, 27b, 27c, 27d, 27e, 27f, 27g, and 27h are referred to as wirings 27 when there is no need to distinguish them.

The wiring block 127A and the wiring block 127F are arranged outside the other wiring blocks 127B, 127C, 127D, and 127E in the first direction Dx. In the wiring block 127A, the wiring 27h is provided at the farthest position from the corner 102, that is, the farthest position from the outer periphery of the first substrate 21A in the first direction Dx. The wiring 27 h is connected to the first electrode COMLa farthest from the driver IC 19 . The wiring 27h is arranged closer to the center of the display area Ad than the wiring 27g.

In the first direction Dx, the wiring 27a is provided at the position closest to the corner 102, that is, the position closest to the outer periphery of the first substrate 21A. The wiring 27a is not connected to the first electrodes COMLa and COMLc at both ends of the first electrodes COML arranged in the second direction Dy. The wiring 27a is connected to the first electrode COML in the central portion in the second direction Dy.

The wiring 27b is connected to the first electrode COML adjacent to the driver IC 19, among the first electrodes COML arranged in the second direction Dy, with respect to the first electrode COML to which the wiring 27a is connected. The wiring 27c is connected to the first electrode COML adjacent to the driver IC 19, among the first electrodes COML arranged in the second direction Dy, with respect to the first electrode COML to which the wiring 27b is connected. The wiring 27d is connected to a first electrode COMLc adjacent to the first electrode COML to which the wiring 27c is connected among the first electrodes COML arranged in the second direction Dy on the side closer to the driver IC 19 . That is, in the first direction Dx, the wiring 27d provided between the wiring 27h furthest from the outer circumference of the first substrate 21A and the wiring 27a closest to the outer circumference of the first substrate 21A is the first wiring closest to the driver IC 19. It is connected to one electrode COMLc.

The wiring 27e is connected to the first electrode COML adjacent to the first electrode COML to which the wiring 27a is connected among the first electrodes COML arranged in the second direction Dy in the direction away from the driver IC 19 . The wiring 27f, the wiring 27g, and the wiring 27h are connected to the first electrode COML at a position away from the driver IC 19 in this order.

That is, in FIG. 30, in the wiring block 127A, the wirings 27a, 27b, 27c, 27d, 27e, 27f, 27g, and 27h are divided into the wiring 27h farthest from the outer circumference of the first substrate 21A and the wiring 27h farthest from the outer circumference of the first substrate 21A. A wiring 27 d provided between the closest wiring 27 a is connected to the first electrode COMLc closest to the driver IC 19 . The wirings 27d, 27c, 27b, and 27a are connected to the first electrodes COML at positions away from the driver IC 19 in the order of the wirings 27d, 27c, 27b, and 27a as they approach the outer periphery of the first substrate 21A. In addition, the wires 27d, 27e, 27f, 27g, and 27h are connected to the first electrodes COML farther from the driver IC 19 in the order of distance from the outer periphery of the first substrate 21A from the wiring 27d.

The wirings 27a, 27b, 27c, 27d, 27e, 27f, 27g, and 27h of the wiring block 127F pass through the center of the recess 101 in the first direction Dx and are aligned with respect to the line of symmetry AX along the second direction Dy. 127A and line symmetry. In the wiring block 127</b>F, the wiring 27 a is connected to the first electrode COMLb located farthest from the driver IC 19 . Also, the wiring 27h is not connected to the first electrodes COMLb and COMLd, but is connected to the first electrode COML in the central portion in the second direction Dy. A wiring 27e between the wiring 27a and the wiring 27h is connected to the first electrode COMLd. With such a configuration, it is possible to secure the connection with the wiring 27 even in the first electrodes COMLa, COMLb, COMLc, and COMLd arranged at the corners of the display area Ad.

The wiring block 127B is connected to each first electrode COML so as to be line-symmetrical with the wiring block 127A. The wiring block 127E is connected to each first electrode COML so as to be line-symmetrical with the wiring block 127F.

The wiring block 127C is connected to each first electrode COML in the same pattern as the wiring block 127B. The wiring block 127C and the wiring block 127D arranged near the recess 101 are arranged line-symmetrically with respect to a line of symmetry AX passing through the center of the recess 101 in the first direction Dx and along the second direction Dy. . Specifically, the wiring 27a of the wiring block 127C and the wiring 27h of the wiring block 127D are arranged with the concave portion 101 interposed therebetween, and are connected to the first electrodes COMLf, COMLf located farthest from the driver IC 19, respectively. The wiring 27b of the wiring block 127C and the wiring 27g of the wiring block 127D are arranged near the end of the recess 101 and connected to the first electrodes COMLe and COMLe, respectively.

The wiring 27c of the wiring block 127C and the wiring 27f of the wiring block 127D are connected to the first electrodes COML and COML adjacent to the driver IC 19 with respect to the first electrodes COMLe and COMLe, respectively. The wiring 27d of the wiring block 127C and the wiring 27e of the wiring block 127D are adjacent to each other on the side closer to the driver IC 19 with respect to the first electrode COML to which the wiring 27c of the wiring block 127C and the wiring 27f of the wiring block 127D are connected. It is connected to the first electrodes COML, COML.

The wiring 27 e of the wiring block 127 C and the wiring 27 d of the wiring block 127 D are connected to the first electrodes COML, COML arranged closest to the driver IC 19 . The wirings 27f, 27g, and 27h of the wiring block 127C are connected to the first electrodes COML at positions away from the driver IC 19 in this order. The wirings 27c, 27b, and 27a of the wiring block 127D are connected to the first electrodes COML at positions away from the driver IC 19 in this order.

In this manner, at least a pair of first electrodes (for example, the first electrode COMLe and the first electrode COMLe) among the plurality of first electrodes COML are arranged in the second direction Dy that passes through the recess 101 and crosses the first direction Dx. They are arranged adjacent to each other in the first direction Dx across a line of symmetry AX along which they extend. A wiring (for example, wiring 27b) connected to one of a pair of first electrodes COMLe is arranged line-symmetrically with respect to a symmetry line AX with a wiring (for example, wiring 27g) connected to the other first electrode COMLe. . The wiring 27 of the wiring block 127C connected to each of the plurality of first electrodes COML arranged in the second direction Dy is connected to the plurality of first electrodes COML adjacent to the plurality of arranged first electrodes COML in the first direction Dx. are arranged line-symmetrically with respect to the line of symmetry AX with the wiring 27 of the wiring block 127D connected to each of them. Thus, even in the first electrodes COMLe, COMLe, COMLf, and COMLf, which are formed in different shapes corresponding to the shape of the recess 101, the connection with the wiring 27 can be ensured.

Each wiring pattern of wiring blocks 127A, 127B, 127C, 127D, 127E, and 127F is not limited to the example shown in FIG. 35 is a plan view of a first substrate according to a first modification of the seventh embodiment; FIG.

As shown in FIG. 35, in the display device 1H of this modified example, the shape of the first substrate 21A is the same as in FIG. That is, the first substrate 21A has a curved corner portion 102 and a concave portion 101 formed on one side of the outer circumference.

In the wiring block 127A, the wiring 27h provided at the farthest position from the corner 102 in the first direction Dx, that is, at the farthest position from the outer periphery of the first substrate 21A, is located at the farthest position from the driver IC 19. It is connected to one electrode COMLa. A wiring 27g adjacent to the wiring 27h in the first direction Dx is connected to the first electrode COMLc closest to the driver IC 19 .

The wiring 27f adjacent to the wiring 27g is connected to the first electrode COML located closer to the driver IC 19 than the first electrode COMLa. The wiring 27e adjacent to the wiring 27f is connected to the first electrode COML located farther from the driver IC 19 than the first electrode COMLc. The wiring 27d adjacent to the wiring 27e is connected to the first electrode COML located closer to the driver IC 19 than the first electrode COML to which the wiring 27f is connected. The wiring 27c adjacent to the wiring 27d is connected to the first electrode COML located farther from the driver IC 19 than the first electrode COML to which the wiring 27e is connected. The wiring 27b adjacent to the wiring 27c is connected to the first electrode COML located closer to the driver IC 19 than the first electrode COML to which the wiring 27d is connected. The wiring 27a provided at the position closest to the corner 102, that is, the position closest to the outer periphery of the first substrate 21A, connects the first electrodes COML at both ends of the first electrodes COML arranged in the second direction Dy. It is connected to the first electrode COML in the excluded central portion. In this manner, the wirings 27h, 27g, 27f, 27e, 27d, 27c, 27b, and 27a are alternately connected to the first electrodes COML in this order and converge to the central first electrode COML. Also in this modification, the wiring 27g arranged between the wiring 27a and the wiring 27h is connected to the first electrode COMLc closest to the driver IC 19 among the first electrodes COML arranged in the second direction Dy. be.

The wirings 27a, 27b, 27c, 27d, 27e, 27f, 27g, and 27h of the wiring block 127F are connected to the respective first electrodes COML so as to be line-symmetrical with respect to the wiring block 127A. With such a configuration, it is possible to secure the connection with the wiring 27 even in the first electrodes COMLa, COMLb, COMLc, and COMLd arranged at the corners of the display area Ad.

Also in this modification, the wiring block 127C and the wiring block 127D at the position corresponding to the recess 101 are aligned with respect to the symmetry line AX passing through the center of the recess 101 in the first direction Dx and along the second direction Dy. arranged symmetrically. Thus, even in the first electrodes COMLe, COMLe, COMLf, and COMLf, which are formed in different shapes corresponding to the shape of the recess 101, the connection with the wiring 27 can be ensured.

Further, in this modified example, the wiring block 127B is connected to each first electrode COML so as to be asymmetrical with respect to the wiring block 127A. The wiring block 127B is connected to each first electrode COML so as to be line-symmetrical with respect to the wiring block 127E. Such a wiring pattern may be used.

In FIG. 35, only in the wiring blocks arranged on the outermost side in the first direction Dx, that is, the wiring block 127A and the wiring block 127F, the wirings 27 are alternately connected to the first electrodes COML, and the wirings 27 are alternately connected to the first electrodes COML. Although the wiring pattern converges on the first electrode COML, the wiring pattern is not limited to this. For example, if the wiring blocks 127A and 127B in FIG. 35 are representative of the arrangement of the wirings 27, the wiring blocks 127A and 127B in FIG. 35 may be provided alternately. Alternatively, a plurality of wiring blocks 127B and one wiring block 127A may be arranged along the first direction Dx. Alternatively, one wiring block 127B and a plurality of wiring blocks 127A may be arranged along the first direction Dx.

FIG. 36 is a plan view of a first substrate according to a second modification of the seventh embodiment; FIG. 37 is a plan view of a first substrate according to a third modified example of the seventh embodiment; In the display device 1I of the second modification shown in FIG. 36, the wiring patterns of the wiring blocks 127A-127F are the same as those shown in FIG. In the display device 1J of the third modified example shown in FIG. 37, the wiring pattern of each wiring block 127A-127F is the same as that shown in FIG.

The modification shown in FIGS. 36 and 37 is different from the display device 1G in FIG. 34 and the display device 1H in FIG. 35 in that dummy wirings Ld are provided. As shown in FIGS. 36 and 37, the wirings 27 are connected to the first electrodes COML through contact holes H1. A dummy wiring Ld extending in a direction parallel to the wiring 27 is provided on the first electrode COML located farther from the driver IC 19 than the first electrode COML connected to the wiring 27 .

The dummy wiring Ld is arranged so as to overlap with the first electrode COML. Dummy wiring Ld and wiring 27 are separated by slit SL. Also, a plurality of dummy wirings Ld are arranged in the second direction Dy. In this case, dummy wirings Ld are separated from each other by slits SL. The dummy wiring Ld may be electrically connected to the first electrode COML arranged to overlap with the dummy wiring Ld. In the examples shown in FIGS. 32 and 33, the width of the slit SL is the same as the interval between the adjacent first electrodes COML in the second direction Dy.

The same material as the wiring 27 is used for the dummy wiring Ld. Also, the dummy wirings Ld are arranged with the same width and the same arrangement pitch as the wirings 27 . By providing the dummy wiring Ld in this way, variations in light transmittance between the portion where the wiring 27 is provided and the portion where the dummy wiring Ld is provided are suppressed. Therefore, the display devices 1I and 1J can obtain good visibility.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments. The content disclosed in the embodiment is merely an example, and various modifications can be made without departing from the scope of the present invention. Appropriate changes that do not deviate from the gist of the present invention naturally belong to the technical scope of the present invention.

For example, the display device of this aspect can take the following aspects.
(1) a substrate;
a plurality of first electrodes arranged in a matrix in the display area of the substrate;
a plurality of second electrodes arranged in a peripheral area outside the display area of the substrate;
a driving unit that supplies a driving signal to the first electrode and the second electrode;
a plurality of wires connected to each of the plurality of first electrodes;
has
the first electrode is electrically connected to the driving unit through the wiring,
The display device, wherein the first electrode and the second electrode output a detection signal corresponding to a change in self-capacitance.
(2) a plurality of the second electrodes are provided along at least one side of the peripheral region;
The display device according to (1) above, wherein the arrangement pitch of the second electrodes is equal to the arrangement pitch of the first electrodes in a direction along one side of the peripheral region.
(3) The display device according to (1) or (2) above, wherein the second electrodes are provided on four sides of the peripheral region surrounding the plurality of first electrodes.
(4) the first electrode and the second electrode constitute a plurality of detection electrode blocks;
The display device according to any one of (1) to (3) above, wherein the drive section supplies the drive signal to the plurality of detection electrode blocks in a time-division manner.
(5) The display device according to any one of (1) to (4) above, wherein the plurality of first electrodes and the plurality of second electrodes are provided in different layers.
(6) a substrate;
a plurality of first electrodes arranged in a matrix in the display area of the substrate;
a second electrode provided along at least one side of a peripheral region outside the display region;
a drive unit that supplies a drive signal to the second electrode;
wiring connected to each of the plurality of first electrodes;
has
the first electrode is electrically connected to the driving unit through the wiring,
A display device, wherein when the drive signal is supplied to the second electrode, the first electrode outputs a detection signal corresponding to a change in capacitance between the first electrode and the second electrode.
(7) the second electrode is provided continuously along at least one side of the peripheral region;
The display device according to (6) above, wherein the plurality of first electrodes are arranged adjacent to the second electrode in the longitudinal direction of the second electrode.
(8) The display device according to (6) or (7) above, wherein the second electrodes surround the plurality of first electrodes and are provided on four sides of the peripheral region.
(9) The display device according to (6) or (7) above, wherein the second electrode is provided continuously over four sides of the peripheral region.
(10) the plurality of first electrodes arranged adjacent to the second electrode constitute a plurality of detection electrode blocks;
The display device according to (8) or (9) above, wherein the first electrode outputs the detection signal for each detection electrode block.
(11) having a cover substrate separated from the substrate in a direction perpendicular to the surface of the substrate;
The display device according to any one of (6) to (10) above, wherein the second electrode is provided in the peripheral region of the cover substrate.
(12) The display device according to any one of (1) to (11) above, further comprising a connection switching circuit for switching connection and disconnection between the first electrode and the driving section.
(13) At the outer circumference of the substrate, in a plan view, a side along a first direction in a plane parallel to the surface of the substrate intersects with a side along a second direction that intersects the first direction. A curved corner is provided to
a plurality of the wires connected to the plurality of first electrodes arranged in the second direction are arranged in the first direction;
the wiring farthest from the outer periphery of the substrate in the first direction is electrically connected to the first electrode farthest from the drive unit;
The wiring arranged between the wiring arranged closest to the outer circumference of the substrate in the first direction and the wiring arranged farthest from the outer circumference of the substrate is the first wiring closest to the driving unit. The display device according to any one of (1) to (12) above, electrically connected to the electrodes.
(14) a concave portion recessed toward the display area is provided on an outer periphery of the substrate along a first direction in a plane parallel to the surface of the substrate in plan view;
At least a pair of the first electrodes among the plurality of first electrodes are arranged adjacent to each other in the first direction across a line of symmetry along a second direction that passes through the recess and intersects with the first direction. cage,
The wiring connected to one of the pair of first electrodes is arranged line-symmetrically with respect to the line of symmetry with the wiring connected to the other first electrode. The display device according to any one of 13).
(15) Above (1) to (1) to above, wherein a dummy wiring extending in a direction parallel to the wiring is provided at the first electrode located farther from the driving unit than the first electrode connected to the wiring. The display device according to any one of (14) above.

Reference Signs List 1, 1A-1J display device 2 pixel substrate 3 counter substrate 6 liquid crystal layer 10 display panel 11 control unit 17 connection circuit 18 touch IC
19 Driver IC
20 display unit 21 first substrate 22 pixel electrodes 27, 28A, 28B, 28C wiring 30 touch sensor 31 second substrate 40 detection unit 48 analog front end circuit 51 cover substrate 53, 53A, 53B, 54, 54A, 54B, 55, 56, 56A second electrode 72, 73 flexible substrate 72A, 73A terminal portion 74 base material 75 COF
COML 1st electrode

Claims (30)

a substrate;
a plurality of electrodes arranged in a matrix in a display area of the substrate in a first direction and in a second direction intersecting the first direction;
a drive unit that supplies a drive signal to the plurality of electrodes;
a plurality of wirings extending in the second direction within the display area and connecting the plurality of electrodes to the drive unit, respectively;
the plurality of wirings comprise a first wiring, a second wiring, and a third wiring arranged in order from one side to the other in the first direction;
the first wiring is connected to the predetermined electrode;
the second wiring overlaps with the predetermined electrode and is connected to another electrode among the electrodes arranged in the second direction with the predetermined electrode;
The third wiring is connected to another electrode out of the electrodes arranged in the second direction with the predetermined electrode without overlapping with the predetermined electrode. An insulating layer is provided between the plurality of electrodes and the plurality of wirings, and each of the electrodes is connected to the plurality of wirings through contact holes provided in the insulating layer. 1. The display device according to 1. 3. The display device according to claim 2, wherein each contact hole is provided at a position overlapping with each electrode in plan view. 4. The device according to claim 1, wherein the first wiring and the second wiring are adjacent to each other, and the second wiring and the third wiring are adjacent to each other. display device. The electrodes connected to the first wiring, the second wiring, and the third wiring aligned in the second direction are arranged in the outermost row in the first direction within the display area. 5. The display device according to claim 1. at least one of the electrodes connected to the second wiring and the third wiring has a smaller area than the predetermined electrode;
The display device according to claim 5. 7. The display device according to claim 6, wherein corners of said display area are arcuate, and electrodes having an area smaller than said predetermined electrode are arcuate along said arc. 8. The display device according to claim 1, further comprising another electrode between said electrode connected to said first wiring and said electrode connected to said second wiring. . 8. The display device according to claim 1, further comprising another electrode between said electrode connected to said first wiring and said electrode connected to said third wiring. . 4. At least one of the first wiring, the second wiring, and the third wiring is connected to the electrode through the contact hole at an intermediate portion of the wiring. The display device according to . At least one of the first wiring, the second wiring, and the third wiring extends from one end to the other end of the display area,
The display device according to any one of claims 1 to 10. The plurality of electrodes form an electrode block for each column in the display area, and the electrodes connected to the first wiring, the second wiring, and the third wiring are arranged in the display area. belonging to the outermost electrode block on one end side in the first direction,
The electrode block positioned outermost on the other end side in the first direction in the display area is positioned around the center line where the arrangement of the wirings and the contact holes bisects the display area in the first direction. is axisymmetric with the electrode block positioned outermost on the end side,
11. The display device according to claim 2, 3 or 10. The plurality of electrodes form an electrode block for each column in the display area, and the electrodes connected to the first wiring, the second wiring, and the third wiring belong to the first block. and
In the second block adjacent to the first block in the first direction, the lines of the wirings and the contact holes are aligned with the imaginary line extending in the second direction between the first block and the second block. Axisymmetric with the first block,
11. The display device according to claim 2, 3 or 10. 14. The display device according to any one of claims 1 to 13, wherein the plurality of electrodes overlap the plurality of pixel electrodes in the display area. a display period in which pixel signals are supplied to the plurality of pixel electrodes and in which the drive unit supplies display drive signals to the plurality of electrodes;
a touch detection period in which the plurality of pixel electrodes hold the pixel signals and the drive unit supplies a drive signal for touch detection to at least one of the plurality of electrodes through the wiring;
15. The display device of claim 14, comprising: a display area;
a first wiring, a second wiring, and a third wiring provided side by side in the first direction in the display area and extending in a second direction intersecting the first direction;
a first electrode, a second electrode, and a third electrode arranged side by side in the second direction within the display area;
An insulating layer provided between these wirings and electrodes,
the first electrode is connected to the first wiring through a first contact hole formed in the insulating layer;
the second electrode is connected to the second wiring through a second contact hole formed in the insulating layer;
the third electrode is connected to the third wiring through a third contact hole formed in the insulating layer;
the first wiring, the second wiring and the third wiring are arranged in this order from one side to the other side in the first direction;
The second contact hole, the first contact hole, and the third contact hole are arranged in this order from one side to the other side in the second direction. 17. The display device according to claim 16, wherein said first wiring, said second wiring and said third wiring are connected to a driving section provided outside said display area. further comprising a peripheral area surrounding the display area;
18. The display device according to claim 17, wherein the driving section is provided along the edge of the display area in the second direction in the peripheral area. 19. The method according to any one of claims 16 to 18, wherein the first wiring and the second wiring are adjacent to each other, and the second wiring and the third wiring are adjacent to each other. display device. The first electrode, the second electrode, and the third electrode connected to the first wiring, the second wiring, and the third wiring are arranged in the outermost row in the display area. 20. The display device according to any one of claims 16 to 19. at least one of the second electrode and the third electrode has a smaller area than the first electrode;
21. A display device according to claim 20. 22. The display device according to claim 21, wherein corners of said display area are arcuate, and electrodes having an area smaller than said first electrode are arcuate along said arc. 23. The display device according to any one of claims 16 to 22, further comprising another electrode between said first electrode and said second electrode. 23. The display device according to any one of claims 16 to 22, further comprising another electrode between said first electrode and said third electrode. At least one of the first wiring, the second wiring, and the third wiring is formed in each of the first contact hole, the second contact hole, and the third contact hole when viewed from the driving section. 18. The display device of claim 17, extending far beyond. At least one of the first wiring, the second wiring, and the third wiring extends from one end of the display area to the other.
26. The display device according to any one of claims 16 to 25. A plurality of electrodes including the first electrode, the second electrode and the third electrode form an electrode block for each column in the display area, and the first electrode and the second electrode and the third electrode belongs to the outermost electrode block on one end side in the first direction in the display area,
an electrode block positioned outermost on the other end side in the first direction in the display area includes a fourth electrode, a fifth electrode, and a sixth electrode;
the fourth electrode is connected to a fourth wiring through a fourth contact hole,
the fifth electrode is connected to a fifth wiring through a fifth contact hole,
the sixth electrode is connected to a sixth wiring through a sixth contact hole,
the arrangement of the first wiring to the third wiring and the arrangement of the first contact hole to the third contact hole about a center line that divides the display area into two areas arranged in the first direction; , the arrangement of the fourth wiring to the sixth wiring and the arrangement of the fourth contact hole to the sixth contact hole are line symmetrical;
27. A display device according to any one of claims 16 to 26. A plurality of electrodes including the first electrode, the second electrode and the third electrode form an electrode block for each column in the display area, and the first electrode and the second electrode and said third electrode belongs to a first block,
a second block adjacent to the first block in the first direction includes a fourth electrode, a fifth electrode, and a sixth electrode;
the fourth electrode is connected to a fourth wiring through a fourth contact hole,
the fifth electrode is connected to a fifth wiring through a fifth contact hole,
the sixth electrode is connected to a sixth wiring through a sixth contact hole,
An imaginary line extending in the second direction between the first block and the second block is used as an axis to form an arrangement of the first wiring to the third wiring , and an arrangement of the first wiring to the third wiring. The arrangement of the contact holes, the arrangement of the fourth wiring to the sixth wiring, and the arrangement of the fourth contact hole to the sixth contact hole are line symmetrical.
27. A display device according to any one of claims 16 to 26. a plurality of electrodes including the first electrode, the second electrode and the third electrode are arranged in a matrix in the first direction and the second direction;
29. The display device according to any one of claims 16 to 28, wherein the plurality of electrodes overlap with the plurality of pixel electrodes in the display area. a display period in which a pixel signal is supplied to the plurality of pixel electrodes and a driving section supplies a drive signal for display to the plurality of electrodes;
a touch detection period in which the plurality of pixel electrodes hold the pixel signals and the drive unit supplies a drive signal for touch detection to at least one of the plurality of electrodes;
30. The display device of claim 29, comprising:

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