JP2020095075A - Display device with sensing function and electronic apparatus - Google Patents

Abstract

To provide a display device capable of simultaneously performing display driving and electromagnetic induction sensor driving by using a configuration of electrodes and various wirings provided in the display device.SOLUTION: A first substrate, a plurality of first sensor electrodes, a shield electrode 24, a plurality of pixel electrodes 25, a display function layer, and a second substrate are provided in this order so as to overlap with each other. Potential fluctuation of the first sensor electrodes 26 to which an electromagnetic induction detection drive signal is supplied is shielded by the shield electrode 24. Induction electromotive force generated in a second sensor electrode 27 intersecting with the first sensor electrodes 26 in a plan view is detected.SELECTED DRAWING: Figure 9

Description

The present invention relates to a display device and electronic equipment having a sensing function.

In recent years, a touch detection device called a touch panel, which can detect an external proximity object, has been receiving attention. The touch panel is mounted on or integrated with a display device such as a liquid crystal display device, and is used as a display device with a touch detection function. Capacitive methods and electromagnetic induction methods are known as detection methods for such display devices. In the electromagnetic induction method, a coil that generates a magnetic field and a coil that detects the magnetic field are provided in the detection device. The pen, which is an external object, is provided with a coil and a capacitive element that form a resonance circuit. The detection device detects the pen by electromagnetic induction between each coil of the detection device and the coil in the pen. The following Patent Document 1 describes a technique relating to an electromagnetic induction type coordinate input device integrated on a display device.

JP, 2016-194580, A

When using the electrodes and various wirings provided in the display device and their drive configuration and directly adopting the electromagnetic induction method, it is necessary to separate the display period and the sensor period, and the time required for display and touch detection may be insufficient. There is a nature. Moreover, since the periods are divided, the driving configuration becomes very complicated.

An object of the present invention is to provide a display device provided with an electromagnetic induction type touch detection function and other sensing functions without impairing the display function of the display device and without additional steps.

A display device with a sensing function according to one aspect of the present invention includes a first substrate, a plurality of first sensor electrodes, a plurality of pixel electrodes, a display function layer, a shield electrode, and a second substrate. The first sensor electrode, the shield electrode, the plurality of pixel electrodes, the display function layer, and the second substrate are provided in this order so as to be overlapped with each other, and a potential fluctuation of the first shield electrode is shielded by the shield electrode. Therefore, the influence on the potential of the pixel electrode is reduced. At least a part of the plurality of pixel electrodes is provided with a reflection area that reflects external light, and the reflection area and the first sensor electrode are arranged so as to overlap each other, thereby providing a sensing function without impairing the aperture ratio of the pixel. You can

A second sensor electrode connected to a first analog front-end circuit that intersects with the first sensor electrode in a plan view is provided, and a signal is supplied to the first sensor electrode in accordance with a control signal from a control unit to perform electromagnetic induction. And a signal is detected by the first analog front-end circuit connected to the second sensor electrode.

The second sensor electrode is provided, for example, between the first substrate and the shield electrode. Alternatively, it is arranged in the same layer as the shield electrode so as to be adjacent to the shield electrode. Further, it is arranged closer to the second substrate than the display function layer.

In addition, a second sensor electrode provided on the second substrate side of the display function layer is provided on the second substrate side for driving for electrostatic capacitance detection, and is provided on the second substrate side of the display function layer. It is also possible to detect electrostatic capacitance by using.

An electronic device according to the present invention includes the above display device with a sensing function.

Since the present invention can reduce the influence on the pixel electrode by shielding the sensor electrode with the shield electrode, it is possible to perform the operation related to the display and the operation related to the sensing at the same time, and perform the operation related to the sensing. Since sufficient time is obtained, the detection accuracy of sensing is improved. Furthermore, by overlapping the sensor electrode at a portion of the pixel electrode that becomes the reflection region, it is possible to prevent the reduction of the aperture ratio and secure the arrangement area of the sensor electrode that can obtain sufficient characteristics. It is possible to improve the sensing accuracy.

FIG. 1 is a block diagram showing a configuration example of a display device according to the first embodiment. FIG. 2 is an explanatory diagram for explaining the basic principle of electromagnetic induction type touch detection. FIG. 3 is an explanatory diagram of a magnetic field generation period for explaining a basic principle of electromagnetic induction type touch detection. FIG. 4 is an explanatory diagram of the magnetic field detection period for explaining the basic principle of electromagnetic induction type touch detection. FIG. 5 is a sectional view showing a schematic sectional structure of the display device according to the first embodiment. FIG. 6 is a plan view showing a pixel structure of the display device according to the first embodiment. FIG. 7 is a circuit diagram showing a pixel array of the display device according to the first embodiment. FIG. 8 is a plan view showing the sensor structure of the display device according to the first embodiment. FIG. 9 is a plan view showing a pixel structure of the display device according to the second embodiment. FIG. 10 is a cross-sectional view showing a schematic cross-sectional structure of the display device according to the third embodiment. FIG. 11 is a plan view showing the pixel structure of the display device according to the third embodiment. FIG. 12 is a sectional view showing a schematic sectional structure of the display device according to the fourth embodiment. FIG. 13 is a cross-sectional view related to the conducting portion of the display device according to the fourth embodiment. FIG. 14 is a plan view showing the pixel structure of the display device according to the fourth embodiment. FIG. 15 is a plan view of the second sensor electrode of the display device according to the fourth embodiment. FIG. 16 is a plan view showing the sensor structure of the display device according to the fifth embodiment. FIG. 17 is a principle diagram for explaining the basic principle of touch detection by the electromagnetic induction method according to the sixth embodiment. FIG. 18 is a plan view showing the sensor structure of the display device according to the seventh embodiment. FIG. 19 is a diagram showing an example of an electronic device to which the display device with a touch detection function according to the present embodiment is applied. FIG. 20 is a diagram showing an example of an electronic device to which the display device with a touch detection function according to the present embodiment is applied.

Modes (embodiments) for carrying out the present invention will be described in detail with reference to the drawings. The present invention is not limited to the contents described in the embodiments below. Further, the constituent elements described below include those that can be easily conceived 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 a person having ordinary skill in the art can easily think of an appropriate modification while keeping the gist of the invention, and is naturally included in the scope of the invention. Further, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each part as compared with the actual mode, but this is merely an example, and the interpretation of the present invention will be understood. It is not limited. In the specification and the drawings, the same elements as those described above with reference to the drawings already described are denoted by the same reference numerals, and detailed description thereof may be appropriately omitted.

(First embodiment)
FIG. 1 is a block diagram showing a configuration example of a display device according to the first embodiment. The display device 1 according to the present embodiment has a built-in detection function that detects contact or proximity of the detection target to the display surface. As shown in FIG. 1, the display device 1 includes a display panel 10, a controller 11, a gate driver 12, a source driver 13, a drive circuit 14, and a detector 40.

The display panel 10 includes a plurality of pixels having display elements and has a display surface facing the plurality of pixels. Further, the display panel 10 receives an input of a video signal and displays an image composed of a plurality of pixels on the display surface.

The control unit 11 is a circuit that supplies a control signal to the gate driver 12, the source driver 13, and the drive circuit 14 based on the video signal Vdisp supplied from the outside to mainly control the display operation.

The gate driver 12 has a function of sequentially selecting one horizontal line to be a display drive target of the display panel 10 based on a control signal supplied from the control unit 11.

The source driver 13 is a circuit that supplies a pixel signal Vpix to each sub-pixel SPix of the display panel 10 based on a control signal supplied from the control unit 11. The invention is not limited to this, and the control unit 11 may generate the pixel signal Vpix and supply the pixel signal Vpix to the source driver 13.

The drive circuit 14 supplies the drive signal Vcomdc for display to the common electrode COML (see FIG. 7) and the electromagnetic induction method to the first sensor electrode 26 (see FIG. 8) based on the control signal supplied from the control unit 11. Is a circuit for supplying the detection drive signal VTx.

The display panel 10 outputs the first detection signal Vdet to the detection unit 40 when detecting the contact or proximity of the touch pen by the electromagnetic induction method.

In the electromagnetic induction type touch detection, the detection unit 40 detects whether or not a touch pen touches the display surface of the display panel 10 based on the first detection signal Vdet output from the display panel 10.

As shown in FIG. 1, the detection unit 40 includes a first analog front end circuit 47 (hereinafter, referred to as AFE (Analog Front End) 47), a signal processing unit 44, a coordinate extraction unit 45, and a detection timing control unit. 46 and.

The AFE 47 includes an amplification section 42 and an A/D conversion section 43. The amplifier 42 amplifies the detection signal Vdet supplied from the display panel 10. The A/D converter 43 samples each analog signal output from the amplifier 42 at a timing synchronized with the drive signal Vcom1 and converts it into a digital signal. The AFE 47 is an analog signal processing circuit that converts the detection signal Vdet into a digital signal and outputs the digital signal to the signal processing unit 44.

The signal processing unit 44 is a logic circuit that detects the presence or absence of a touch on the display panel 10 based on the output signal of the AFE 47. The signal processing unit 44 performs a process of extracting a signal (absolute value |ΔV|) of a difference between detection signals of the detected object. The signal processing unit 44 compares the absolute value |ΔV| with a predetermined threshold voltage, and if the absolute value |ΔV| is less than the threshold voltage, it is determined that the detected object is in the non-contact state. .. On the other hand, if the absolute value |ΔV| In this way, the detection unit 40 can perform touch detection.

In the present specification, the “contact state” includes a state in which the detection target is in contact with the display surface or a state in which the detection target is close enough to be regarded as contact. Further, the “non-contact state” includes a state in which the detection target is not in contact with the display surface or a state in which the detection target is not close enough to be regarded as contact.

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 unit 45 may output the output signal Vout to the control unit 11. The control unit 11 can execute a predetermined display operation or detection operation based on the output signal Vout.

The detection timing control unit 46 controls the AFE 47, the signal processing unit 44, and the coordinate extraction unit 45 to operate in synchronization with each other, based on the control signal supplied from the control unit 11.

The AFE 47 of the detection unit 40, the signal processing unit 44, the coordinate extraction unit 45, and the detection timing control unit 46 are mounted on the display device 1. However, the present invention is not limited to this, and all or part of the functions of the detection unit 40 may be mounted on an external processor or the like. For example, the signal processing unit 44 and the coordinate extraction unit 45 may be mounted on an external controller 200 different from the display device 1.

Next, the basic principle of touch detection by the electromagnetic induction method of the display panel 10 of the present embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is an explanatory diagram of a magnetic field generation period for explaining a basic principle of electromagnetic induction type touch detection. FIG. 4 is an explanatory diagram of the magnetic field detection period for explaining the basic principle of electromagnetic induction type touch detection.

As shown in FIGS. 3 and 4, in the electromagnetic induction method, contact or proximity of the touch pen 100 is detected. A resonance circuit 101 is provided inside the touch pen 100. The resonance circuit 101 is configured by connecting a coil 102 and a capacitive element 103 in parallel.

In the electromagnetic induction method, the transmission coil CT and the reception coil CR are provided so as to overlap each other. The transmission coil CT includes a plurality of transmission coils CTx. The receiving coil CR includes a plurality of receiving coils CRx. The transmission coils CTx have a length in the first direction Dx and are arranged in a plurality in the second direction Dy intersecting the first direction Dx. The receiving coils CRx have a length in the second direction Dy and are arranged in a plurality in the first direction Dx. The reception coil CRx is provided so as to intersect the transmission coil CTx in a plan view. The transmission coil CTx is connected to an AC signal source (driving signal source), and the reception coil CRx is connected to a voltage detector DET (see FIG. 2).

As shown in FIG. 3, during the magnetic field generation period, an AC rectangular wave having a predetermined frequency (for example, several kHz to several hundred kHz) is applied from the AC signal source to the transmission coil CTx. As a result, a current flows through the transmission coil CTx, and the transmission coil CTx generates a magnetic field M1 according to this change in current. When the touch pen 100 is in contact with or in proximity to the touch pen 100, electromotive force is generated in the coil 102 due to mutual induction between the transmission coil CTx and the coil 102. As a result, the capacitive element 103 is charged.

Next, in the magnetic field detection period shown in FIG. 4, the coil 102 of the touch pen 100 generates a magnetic field M2 that changes according to the resonance frequency of the resonance circuit 101. When the magnetic field M2 passes through the receiving coil CRx, an electromotive force due to mutual induction between the receiving coil CRx and the coil 102 is generated in the receiving coil CRx. A current corresponding to the electromotive force of the receiving coil CRx flows through the voltage detector DET in the detection unit 40.

The voltage detector DET converts the fluctuation of the current according to the electromotive force of the receiving coil CRx into the fluctuation of the voltage. The detection unit 40 determines whether the touch pen 100 is in a non-contact state, a contact state, or a proximity state by comparing the absolute value |ΔV| with a predetermined threshold voltage as described above. By scanning the transmission coil CTx and the reception coil CRx respectively, the detection unit 40 can detect the touch pen 100 based on the basic principle of touch detection of the electromagnetic induction method.

Next, a configuration example of the display device 1 of this embodiment will be described in detail. FIG. 5 is a sectional view showing a schematic sectional structure of the display device according to the first embodiment. As shown in FIG. 5, the display device 1 includes a pixel substrate 2, a counter substrate 3, a liquid crystal layer 6 as a display function layer, and a cover substrate 50. The counter substrate 3 is arranged so as to face the surface of the pixel substrate 2 in a direction perpendicular to the surface. The liquid crystal layer 6 is provided between the pixel substrate 2 and the counter substrate 3.

The cover substrate 50 is provided on the surface of the counter substrate 3. The cover substrate 50 is a protective member for covering and protecting the pixel substrate 2 and the counter substrate 3. The cover substrate 50 has a first surface 50a and a second surface 50b opposite to the first surface 50a. The first surface 50a of the cover substrate 50 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. In the present embodiment, the touch detection includes the case of detecting the detected object that directly contacts the first surface 50a. In addition, the touch detection includes a case where a protective film (not shown) or the like is provided on the first surface 50a and the detection target that contacts the protective film is detected.

The second surface 50b of the cover substrate 50 is bonded to the polarizing plate 36 via the adhesive layer 55. The cover substrate 50 may be a glass substrate or may be a film-shaped base material using a resin material or the like. Light incident from the outside on the first surface 50a side is reflected by the pixel electrode 25 of the pixel substrate 2 and emitted from the first surface 50a. The display device 1 of the present embodiment is a reflective liquid crystal display device that displays an image using this reflected light.

In this specification, the direction parallel to the first surface 50a is the first direction Dx, and the direction parallel to the first surface 50a and the first direction Dx is the second direction Dy. The direction perpendicular to the first surface 50a is the third direction Dz. Further, in the present specification, the direction from the first substrate 21 to the second substrate 31 in the direction perpendicular to the first substrate 21 is referred to as “upper side”. Further, the direction from the second substrate 31 to the first substrate 21 will be referred to as “lower side”. Further, “plan view” refers to a case viewed from a direction perpendicular to the surface of the first substrate 21.

The pixel substrate 2 includes a first substrate 21, a first sensor electrode 26, a second sensor electrode 27, a pixel electrode 25, a shield electrode 24, a signal line SGL that forms a TFT (Thin Film Transistor), and a gate line. It has GCL, a silicon layer SI, insulating films 23 and 23A, a planarizing film 29, and an alignment film 28. The first sensor electrode 26, the shield electrode 24, and the pixel electrode 25 are provided on the first substrate 21 in this order. As the first substrate 21, for example, a glass substrate is used.

A plurality of pixel electrodes 25 are provided on the insulating film 23A. The alignment film 28 is disposed on the outermost surface of the pixel substrate 2 and is provided between the pixel electrode 25 and the liquid crystal layer 6. The pixel electrode 25 is formed of a metal such as aluminum (Al) or silver (Ag). Further, the pixel electrode 25 may have a configuration in which these metal materials and a translucent conductive material such as ITO (Indium Tin Oxide) are laminated. The pixel electrode 25 is made of a material having a good reflectance, and is formed as a reflective electrode that diffuses and reflects light incident from the outside. The pixel electrode 25 is connected to the contact hole connecting portion CHA via the contact hole portion CH provided in the insulating film 23A, and the contact hole connecting portion CHA is connected to the drain electrode portion DR.

The shield electrode 24 is provided on the flattening film 29. The shield electrode is made of a transparent conductive material such as ITO. Further, by using a metal material for the shield electrode 24, or by reducing the electric resistance by laminating the metal material in a part of the region, it is possible to improve the electric shield performance.

The first sensor electrode 26 is made of the same metal material as the signal line SGL, such as aluminum (Al) or copper (Cu), and is formed in the same photolithography process as the signal line SGL. Similarly, the second sensor electrode 27 is made of the same metal material as the gate line GCL, for example, aluminum, copper, molybdenum (Mo), etc., and is formed in the same photolithography process as the gate line GCL.

The first sensor electrode 26 is provided between the first substrate 21 and the shield electrode 24 in the direction perpendicular to the surface of the first substrate 21. The first sensor electrode 26 is provided so as to overlap the shield electrode 24 and the pixel electrode 25 with the insulating layers 23 and 23A and the flattening film 29 interposed therebetween. As a result, the storage capacitor 53 (see FIG. 6) is formed between the shield electrode 24 and the pixel electrode 25, and the capacitance between the first sensor electrode and the pixel electrode can be almost eliminated. The signal applied to 26 can prevent the potential of the pixel electrode 25 from being affected. In the present embodiment, the first sensor electrode 26 further functions as the transmission coil CTx (see FIGS. 3 and 4) of the display panel 10.

Similarly, the second sensor electrode 27 is provided between the first substrate 21 and the shield electrode 24 in the direction perpendicular to the surface of the first substrate 21. The second sensor electrode 27 is provided so as to overlap the shield electrode 24 and the pixel electrode 25 with the insulating layers 23 and 23A and the flattening film 29 interposed therebetween. As a result, the storage capacitor 53 (see FIG. 6) is formed between the shield electrode 24 and the pixel electrode 25. In the present embodiment, the second sensor electrode 27 further functions as a receiving coil (see FIGS. 3 and 4) of the display panel 10.

The counter substrate 3 is provided on the second substrate 31, the color filter 32 provided on one surface of the second substrate 31, the common electrode COML, the alignment film 38, and the other surface of the second substrate 31. It has an insulating layer 35 and a polarizing plate 36. In the present embodiment, the second substrate 31 is, for example, a glass substrate or a resin substrate.

The color filter 32 faces the liquid crystal layer 6 in the direction perpendicular to the first substrate 21. The color filter 32 may be arranged on the first substrate 21. The color filter 32 has three filters, for example, a color area 32R (red), a color area 32G (green), and a color area 32B (blue, not shown). The color filter 32 may include a W (white) filter, or may include five or more different color filters. A light shielding layer 39 is provided at the boundary between the color regions 32R, 32G, 32B. The light-shielding layer 39 is a colored resin layer called a so-called black matrix or a metal layer.

The common electrode COML is provided on the opposite side of the polarizing plate 36 with respect to the second substrate 31. The common electrode COML is provided between the color filter 32 and the liquid crystal layer 6 in the direction perpendicular to the first substrate 21. The common electrode COML is formed of a translucent conductive material such as ITO.

The liquid crystal layer 6 contains, for example, a nematic liquid crystal. The liquid crystal layer 6 changes its direction from the initial alignment based on the electric field formed between the common electrode COML and the pixel electrode 25 by changing the voltage level between the common electrode COML and the pixel electrode 25. .. Thereby, the light transmitted through the liquid crystal layer 6 is modulated for each sub-pixel SPix.

With such a configuration, the first substrate 21, the plurality of first sensor electrodes 26 and the plurality of second sensor electrodes 27, the shield electrode 24, the plurality of pixel electrodes 25, the liquid crystal layer 6 as the display function layer, the common electrode COML, They are provided overlapping in this order. Further, the second substrate 31, which is an insulating substrate, is provided above the common electrode COML. Incident light incident from the first surface 50a side of the display device 1 passes through the counter substrate 3 and the liquid crystal layer 6 and reaches the pixel electrode 25. Then, the incident light is reflected by the pixel electrode 25. The light reflected by the pixel electrode 25 passes through the liquid crystal layer 6, is modulated for each sub-pixel SPix, and is emitted from the first surface 50a.

Since the display device 1 according to the present embodiment is a reflective display device that reflects external light to perform display, even if the first sensor electrode 26 and the second sensor electrode 27 overlap with the pixel electrode in plan view, There is no light loss associated with it. Therefore, the first sensor electrode 26 and the second sensor electrode 27 having a sufficient area can be arranged, and the electrical resistance can be designed so that the sensing characteristics can be improved.

Further, since the display device 1 is a reflective display device that reflects external light to perform display, no light source such as a front light or a backlight is arranged. The present invention is not limited to this, and a light source such as a front light or a backlight may be provided. In this case, the front light is provided on the first surface 50a side. The backlight is provided on the back surface of the pixel substrate 2, that is, on the opposite side of the first substrate 21 from the liquid crystal layer 6. When a backlight is used, the light from the backlight passes between the pixel electrodes 25 and reaches the first surface 50a. The light from the backlight functions as auxiliary light. Furthermore, by making a part of the pixel electrode 25 transparent in a region of one pixel that does not overlap the first sensor electrode 26 and the second sensor electrode 27, the light from the backlight can be emitted from the transparent electrode of the pixel electrode 25. It passes through the portion and reaches the first surface 50a.

Next, a schematic plan view of the display device according to the present embodiment will be described. FIG. 6 shows a planar configuration of the pixel substrate 2 in FIG. The first sensor electrode 26, the second sensor electrode 27, the pixel electrode 25, the shield electrode 24, the signal line SGL forming the TFT, the gate line GCL, and the silicon layer SI are shown. For each sub-pixel SPix, the pixel electrode 24 is connected to the TFT via a contact hole provided in the shield electrode 24 and the flattening film (not shown). The second sensor electrode 27 is arranged in parallel with the extending direction of the gate line GCL, and the first sensor electrode 26 is arranged in parallel with the extending direction of the signal line SGL.

By changing the position of the TFT element for each sub-pixel SPix and arranging the signal line and the first sensor electrode 26 while bending them, the width of the first sensor electrode 26 is prevented from becoming extremely narrow. This can reduce the resistance value of the wiring formed by the first sensor electrode 26.

The gate line GCL, the signal line SGL, the first sensor electrode 26, and the second sensor electrode 27 are covered with the shield electrode 24 in a plan view. As a result, each electrode and the pixel electrode 24 are electrically separated from each other, and are not affected by potential fluctuations related to sensing, so that display driving and sensing driving can be performed at the same time.

Next, the display operation of the display device 1 will be described. FIG. 7 is a circuit diagram showing a pixel array of the display device according to the first embodiment. On the first substrate 21 shown in FIG. 7, the switching element Tr of each sub-pixel SPix, the signal line SGL that supplies the pixel signal Vpix to each pixel electrode 25, and the gate line GCL that supplies the drive signal that drives each switching element Tr. Etc. are formed. The signal line SGL and the gate line GCL are provided on a plane parallel to the surface of the first substrate 21. The plurality of gate lines GCL and the plurality of signal lines SGL are provided so as to intersect with each other. The display area Ad (see FIG. 8) is divided into a matrix by the gate lines GCL and the signal lines SGL. This one-partitioned area is called a sub-pixel SPix.

As shown in FIG. 7, the display device 1 has a plurality of sub-pixels SPix arranged in a matrix. Each sub-pixel SPix includes a switching element Tr, a liquid crystal element 52, and a storage capacitor 53. A pixel electrode 25 (see FIG. 6) is provided in the sub-pixel SPix, and each pixel electrode 25 is connected to the switching element Tr. 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. The liquid crystal element 52 includes a liquid crystal capacitance generated between the pixel electrode 25 and the common electrode COML. As the storage capacitor 53, a capacitor formed between the pixel electrode 25 and the shield electrode 24 can be used. The invention is not limited to this, and a capacitor may be provided.

By providing the storage capacitor 53 between the pixel electrode 25 and the shield electrode 24 as described above, it is possible to minimize or eliminate a storage capacitor element that is originally required separately, and accordingly, the first sensor electrode 26 and the first sensor electrode 26 and Since the area of the two-sensor electrode 27 can be increased, the sensing characteristics can be improved.

The plurality of gate lines GCL are connected to the gate driver 12. The gate driver 12 sequentially selects the gate line GCL. The gate driver 12 applies the scanning signal Vscan (see FIG. 1) to the gate of the switching element Tr via the selected gate line GCL. As a result, one row (one horizontal line) of the sub-pixel SPix is sequentially selected as a display drive target. Further, the plurality of signal lines SGL are connected to the source driver 13. The source driver 13 supplies the pixel signal Vpix to the sub-pixels SPix forming one selected horizontal line via the signal line SGL. Then, 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 drive circuit 14 (see FIG. 1) applies the drive signal Vcomdc for display to the common electrode COML and the shield electrode 24. As a result, each common electrode COML functions as a common electrode for the pixel electrode 25 during the display operation.

Each of the sub-pixels SPix shown in FIG. 6 described above is associated with the color regions 32R, 32G, 32B of three colors of R, G, B as one set, and the sub-regions corresponding to the color regions 32R, 32G, 32B of three colors. Pixels Pix are configured with one set of pixels SPix.

Next, the configuration of the common electrode COML and the touch detection operation will be described. FIG. 8 is a plan view schematically showing the display device according to the first embodiment. As shown in FIG. 8, the display device 1 includes a display area Ad and a peripheral area Gd. In the present specification, the display area Ad is an area for displaying an image, and is an area overlapping the plurality of pixels Pix (sub-pixels SPix). In the present embodiment, the direction along the long side of the display area Ad is the second direction Dy, and the direction intersecting the second direction Dy is the first direction Dx.

As shown in FIG. 8, the flexible substrate 110 is connected to the peripheral region Gd of the first substrate 21. The flexible substrate 110 is provided with a drive IC 19 and a touch IC 49 for controlling the detection operation of the display panel 10. The drive IC 19 operates in synchronization with the detection operation by the touch IC 49. The first sensor electrodes 26 are electrically connected to the drive ICs 19, respectively. The second sensor electrodes 27 are electrically connected to the touch ICs 49, respectively. Various circuits such as the source driver 13 and the drive circuit 14 shown in FIG. 1 are formed in the drive IC 19. Further, it is formed on the AFE 47 and the touch IC 49 shown in FIG.

As shown in FIG. 8, the first sensor electrode 26 is provided in the display area Ad of the first substrate 21, and the first sensor wiring 26W connected to the first sensor electrode is provided in the peripheral area Gd. The first sensor electrodes 26 are elongated in the second direction Dy and are arranged in the first direction Dx. The first sensor electrode 26 is a coil that generates a magnetic field by applying an external current from the driving IC 19, and the coils of the adjacent first sensor electrodes partially overlap each other. As a result, it is possible to eliminate a region where the magnetic field is not generated between the adjacent first sensor electrodes. In FIG. 7, the first sensor electrode 26 forming the coil is an electrode having a width corresponding to one pixel, but the first sensor electrodes 26 of a plurality of pixels may be bundled in parallel to form the coil.

Similarly, the second sensor electrode 27 is provided in the display area Ad of the first substrate 21, and the second sensor wiring 27W connected to the second sensor electrode is provided in the peripheral area Gd. The second sensor electrodes 27 are elongated in the first direction Dy and are arranged in the second direction Dx. The second sensor electrode 27 is a coil that receives a magnetic field from an external touch pen and generates a signal current by mutual induction, and the generated signal current is detected by the touch IC 49. Similar to the first sensor electrode 26, the second sensor electrode 27 overlaps with the adjacent second sensor electrode, and eliminates the region that cannot receive the magnetic field from the pen. Further, the second sensor electrodes 27 of a plurality of pixels may be bundled in parallel to form a coil.

Various circuits such as a gate scanning unit are provided on the long side of the peripheral region Gd of the first substrate 21. The gate scanning unit is a circuit included in the gate driver 12 (see FIG. 1) and sequentially selects the gate line GCL. A first sensor electrode wiring 26W electrically connected to the first sensor electrode 26 is arranged and connected to a predetermined terminal of the flexible substrate 110. Similarly, a source driver 13 including a source selection circuit such as a multiplexer is provided on the short side of the peripheral region Gd of the first substrate 21. A second sensor electrode wiring 27W electrically connected to the second sensor electrode is arranged and connected to a predetermined terminal of the flexible substrate 110.

With this configuration, in the shield electrode 24 shown in FIG. 5, the first sensor electrode 26 and the second sensor electrode 27 are electrically separated from the pixel electrode and the liquid crystal layer, so that the sensing operation is performed at the same time as the display operation. Since it can be performed, a large amount of time can be spent on sensing, which enables highly accurate sensing.

(Second embodiment)
Next, a schematic plan view of the display device of the second embodiment will be described as a modification of the first embodiment. FIG. 9 shows a planar structure of the pixel substrate 2 having the same layer structure as that of FIG. The first sensor electrode 26, the second sensor electrode 27, the pixel electrode 25, the shield electrode 24, the signal line SGL forming the TFT, the gate line GCL, and the silicon layer SI are shown. For each sub-pixel SPix, the pixel electrode 24 is connected to the TFT via a contact hole provided in the shield electrode 24 and the flattening film (not shown). The second sensor electrode 27 is arranged parallel to the extending direction of the gate line GCL, and the first sensor electrode 26 is arranged parallel to the extending direction of the signal line SGL.

The signal lines SGL for each sub-pixel SPix are arranged in the horizontal direction on the drawing, while the pixel electrodes 25 are arranged in the vertical direction on the drawing. By changing the position of the TFT element for each sub-pixel SPix and arranging the signal line while bending it, it is possible to make the arrangement position of the signal line SGL non-uniform, and to arrange the wider first sensor electrode 26. You can The shield electrode 24 electrically separates the pixel electrode 25 from the other electrodes, and since the display device is a reflection type display device, the electrode design arranged closer to the substrate 21 than the pixel electrode 25 has an optical aperture ratio. Since there is no influence, such an electrode arrangement is possible.

By partially thinning the first sensor electrode 26 located between the pixel electrodes 25 of each sub-pixel SPix, the influence that external light hits the first sensor electrode 25 and is reflected to deteriorate the display contrast is minimized. can do. Similarly, by arranging the second sensor electrode 27 while avoiding between the pixel electrodes, it is possible to prevent the display contrast from being lowered.

(Third Embodiment)
FIG. 10 is a cross-sectional view showing a schematic cross-sectional structure of the display device according to the third embodiment. As shown in FIG. 10, the display device 1 includes a pixel substrate 2, a counter substrate 3, a liquid crystal layer 6 as a display functional layer, and a cover substrate 50, as in the first embodiment. The counter substrate 3 is arranged so as to face the surface of the pixel substrate 2 in a direction perpendicular to the surface. The liquid crystal layer 6 is provided between the pixel substrate 2 and the counter substrate 3. The reflective display device displays an image by reflecting external light from the pixel electrode 25.

The pixel substrate 2 includes a first substrate 21, a first sensor electrode 26, a second sensor electrode 27A, a pixel electrode 25, a shield electrode 24, a signal line SGL forming a TFT, a gate line GCL, and a silicon layer SI. And insulating films 23 and 23A, a flattening film 29, and an alignment film 28. The first sensor electrode 26 is a metal wiring such as aluminum (Al) formed in the same photolithography process at the same time as the signal line SGL, and is electrically covered with the pixel electrode 25 because it is covered with the shield electrode 24 in a plan view. It is separated.

The second sensor electrode 27A is formed on the flattening film 29 like the shield electrode 24 and is not connected to the shield electrode 24. The second sensor electrode 27 is formed by laminating a metal layer such as aluminum (Al) and a translucent conductive material such as ITO. This laminated ITO layer is formed at the same time when the shield electrode 24 is formed.

The first sensor electrode 26 is provided between the first substrate 21 and the shield electrode 24 in the direction perpendicular to the surface of the first substrate 21. The first sensor electrode 26 is provided so as to overlap the shield electrode 24 and the pixel electrode 25 with the insulating layers 23 and 23A and the flattening film 29 interposed therebetween. As a result, the storage capacitor 53 (see FIG. 7) is formed between the shield electrode 24 and the pixel electrode 25, and the capacitance between the first sensor electrode 26 and the pixel electrode 25 can be almost eliminated. The signal applied to the first sensor electrode 26 functions as the transmission coil CTx (see FIG. 3 and FIG. 4), but since it is covered by the shield electrode 24, the potential of the pixel electrode 25 is prevented from being affected. be able to.

The second sensor electrode 27A is provided on the flattening layer 29 in parallel with the shield electrode 24, forms a storage capacitor 53 with the pixel electrode 25, and receives coil CRx (see FIGS. 3 and 4). Also has a function as. Similar to the shield electrode 24, the parasitic capacitance between the signal line SGL and the pixel electrode 25 can be reduced. Unlike the first sensor electrode 26, the second sensor electrode 27A has a small potential fluctuation due to application of a signal for sensing driving, and therefore the electrical influence on the pixel electrode 25 is negligible.

Since the second sensor electrode 27 in the first embodiment is formed in the same photolithography process as the gate line GCL, it is necessary to use a high resistance material such as molybdenum (Mo) due to process restrictions. In the present embodiment, since the second sensor electrode 27A is formed on the flattening layer 29 like the shield electrode 24, there are few process restrictions and a low resistance material such as aluminum (Al) can be selected, and the gate line GCL is avoided. Since it is not necessary to design and place the device, it is possible to design a wide range of low resistance. Further, in the first embodiment, since the first sensor electrode 26 and the second sensor electrode 27 intersect with each other with the insulating film 23 interposed therebetween, they have large capacitances with each other, and a large load is generated during driving and detection. .. In the present embodiment, the second sensor electrode 27A overlaps with the first sensor electrode 26 and other electrodes via the flattening layer 29. Since the flattening layer 29 is formed of an acrylic resin or the like, the capacitive load on the second sensor electrode 27A is particularly reduced, and signal delay and noise due to the capacitance can be improved.

Next, a schematic plan view of the display device according to the present embodiment will be described. FIG. 11 shows a planar configuration of the pixel substrate 2 in FIG. The first sensor electrode 26, the second sensor electrode 27A, the pixel electrode 25, the shield electrode 24, the signal line SGL forming the TFT, the gate line GCL, and the silicon layer SI are shown. For each sub-pixel SPix, the pixel electrode 25 is connected to the TFT via a contact hole provided in the shield electrode 24 and the flattening film (not shown). The second sensor electrode 27 is arranged in parallel with the extending direction of the gate line GCL, and the first sensor electrode 26 is arranged in parallel with the extending direction of the signal line SGL.

The second sensor electrode 27A arranged so as to be adjacent to the shield electrode 24 is provided by laminating aluminum and ITO so as to cover it. The aluminum portion is provided so as to overlap with the pixel electrode 25, and external light is not reflected by the aluminum portion to reduce the contrast.

The gate line GCL, the signal line SGL, and the first sensor electrode 26 are covered with the shield electrode 24 and the second sensor electrode 27A in plan view. As a result, since the first sensor electrode, which has a large potential fluctuation related to sensing, is electrically separated from the pixel electrode 24, it is possible to drive the display and the sensing at the same time.

(Fourth Embodiment)
FIG. 12 is a sectional view showing a schematic sectional structure of the display device according to the fourth embodiment. As shown in FIG. 12, the display device 1 includes a pixel substrate 2, a counter substrate 3, a liquid crystal layer 6 as a display function layer, and a cover substrate 50, as in the first embodiment. The counter substrate 3 is arranged so as to face the surface of the pixel substrate 2 in a direction perpendicular to the surface. The liquid crystal layer 6 is provided between the pixel substrate 2 and the counter substrate 3. The reflective display device displays an image by reflecting external light from the pixel electrode 25.

The pixel substrate 2 includes a first substrate 21, a first sensor electrode 26, a pixel electrode 25, a shield electrode 24, a signal line SGL forming a TFT, a gate line GCL, a silicon layer SI, and insulating films 23 and 23A. , A planarizing film 29 and an alignment film 28. The counter substrate 3 includes a second substrate 31, a light shielding layer 39 provided on one surface of the second substrate 31, a second sensor electrode 27B, a color filter 32, a common electrode COML, an alignment film 38, and a second substrate. It has an insulating layer 35 provided on the other surface of the substrate 31, a polarizing plate 36, an adhesive layer 55, and a cover substrate 50.

Similar to the first embodiment, the first sensor electrode 26 is provided between the first substrate 21 and the shield electrode 24 in the direction perpendicular to the surface of the first substrate 21. The first sensor electrode 26 is provided so as to overlap the shield electrode 24 and the pixel electrode 25 with the insulating layers 23 and 23A and the flattening film 29 interposed therebetween. As a result, the storage capacitor 53 (see FIG. 6) is formed between the shield electrode 24 and the pixel electrode 25, and the capacitance between the first sensor electrode 26 and the pixel electrode 25 can be almost eliminated. The signal applied to the first sensor electrode 26 functions as the transmission coil CTx (see FIG. 3 and FIG. 4), but since it is covered by the shield electrode 24, the potential of the pixel electrode 25 is prevented from being affected. be able to.

The second sensor electrode 27B is provided so as to at least partially overlap the light shielding layer 39, and is formed of a metal layer such as aluminum (Al) or copper (Cu). As a result, even when external light strikes the display device 1, the light is absorbed by the light shielding layer 39, so that the display is not affected by the reflection from the second sensor electrode 27B. The light shielding layer 39 is formed of a resin containing a pigment or the like. In the case where the second sensor electrode 27B itself is blackened such that the reflectance of the second sensor electrode 27B itself is low, such as a laminated layer of copper oxide (CuO), the light shielding layer 39 does not necessarily have to cover the entire second sensor electrode 27B. The second sensor electrode 27B functions as a receiving coil CRx (see FIGS. 3 and 4). Since the common electrode COML is provided between the second sensor electrode 27B and the liquid crystal layer 6, the potential of the second sensor electrode 27B does not affect the liquid crystal layer 6.

Since the color filter layer 32 made of acrylic resin or the like is disposed between the second sensor electrode 27B and the common electrode COML, the second sensor electrode 27B is formed thick to reduce resistance because it can be sufficiently flattened. It is possible to

As shown in FIG. 13, in the counter substrate 3, the color filter 32 is provided on one surface of the second substrate 31. The common electrode COML is provided between the color filter layer 32 and the liquid crystal layer 6. Further, the second sensor electrode 27B is provided between the color filter layer 32 and the light shielding layer 39. The second sensor electrode 27B is continuously provided from the display area Ad to the peripheral area Gd. In the peripheral region Gd, the second sensor electrode 27B is covered with the sensor conducting portion 72.

In the peripheral region Gd, the conducting portion 81 is provided between the first substrate 21 and the second substrate 31. The conducting portion 81 is a seal portion that seals between the first substrate 21 and the second substrate 31. The conductive portion 81 includes a plurality of conductive particles 82 dispersed in the sealing material. The conductive portion 81 is provided on the upper side of the peripheral circuit region 80 via the flattening film 29. Note that FIG. 13 is only schematically shown, and only one conductive particle 82 is shown in the conductive portion 81. Without being limited to this, a plurality of conductive particles 82 are dispersed in the conductive portion 81 to electrically connect the sensor conductive portion 72 and the conductive layer 71.

The upper portion of the conducting portion 81 is connected to the sensor conducting portion 72. The lower portion of the conductive portion 81 is connected to the connection electrode 72 via the conductive layer 71. The conductive layer 71 is a transparent conductive material such as ITO.

Next, a schematic plan view of the display device according to the present embodiment will be described. FIG. 14 shows only the planar structure of the pixel substrate 2 in FIG. 12 and the second sensor electrode 27B on the counter substrate 3. The first sensor electrode 26, the pixel electrode 25, the shield electrode 24, the signal line SGL forming the TFT, the gate line GCL, and the silicon layer SI are shown. For each sub-pixel SPix, the pixel electrode 25 is connected to the TFT via a contact hole provided in the shield electrode 24 and the flattening film (not shown). The first sensor electrode 26 is arranged in parallel with the extending direction of the signal line SGL, the second sensor electrode 27 is arranged in parallel with the extending direction of the gate line GCL, and adjacent second sensor electrodes are connected at a constant interval. It is connected at 27Ba.

Like the first embodiment, the first sensor electrode 26, the signal line SGL, the gate line GCL, etc. are covered with the shield electrode 24 and have no parasitic capacitance with the pixel electrode 25. Since the fluctuation does not affect the pixel electrode potential and the display quality, display driving and sensing driving can be performed at the same time.

The second sensor electrode 27B is arranged at a position located between the sub-pixels SPix. Unlike the cases of the first to third embodiments, the second sensor electrode 27B is arranged closer to the counter substrate than the pixel electrode. Therefore, the second sensor electrode 27B is arranged avoiding the openings of the pixels to reduce the influence on the display performance. There is a need. FIG. 15 is a schematic plan view of a region including a plurality of pixels. Even if the second sensor electrode 27B is arranged at a position located between the sub-pixels, the pixel opening portion is reduced. Therefore, if the second sensor electrode 27B is arranged between all the sub-pixels, the reflectance is reduced. By arranging the connecting portions 27Ba while shifting them at regular intervals as shown in FIG. 15, it is possible to minimize the reduction in the aperture ratio and prevent display defects such as streak defects from occurring.

The second sensor electrode 27B is arranged at a position located between the sub-pixels SPix. Unlike the cases of the first to third embodiments, the second sensor electrode 27B is arranged closer to the counter substrate than the pixel electrode. Therefore, the second sensor electrode 27B is arranged avoiding the openings of the pixels to reduce the influence on the display performance. There is a need. In the present embodiment, the second sensor electrode 27B has a tail provided between the liquid crystal layer 6 and the second substrate 31, but the second sensor electrode 27B is a surface of the second substrate 31 opposite to the liquid crystal layer 6. Alternatively, another substrate provided with the second sensor electrode 27B may be provided on the opposite side of the second substrate 31 from the liquid crystal layer 6.

(Fifth Embodiment)
The schematic cross-sectional view of the fifth embodiment is similar to that of the fourth embodiment, and has the structure shown in FIG. The display device 1 includes the pixel substrate 2, the counter substrate 3, the liquid crystal layer 6 as a display function layer, and the cover substrate 50, as in the first embodiment. The counter substrate 3 is arranged so as to face the surface of the pixel substrate 2 in a direction perpendicular to the surface. The liquid crystal layer 6 is provided between the pixel substrate 2 and the counter substrate 3. The reflective display device displays an image by reflecting external light from the pixel electrode 25.

In the fifth embodiment, as in the fourth embodiment, the second sensor electrode 27B is provided on the second substrate 31, and in addition to that, the third sensor electrode 41 for performing electrostatic touch driving is provided in the second. It is provided in the same layer as the sensor electrode 27B. Similar to the second sensor electrode 27B, the third sensor electrode 41 is connected to the first substrate 21 via the conductive particles 82 of the conductive portion 81 in the peripheral region Gd, and is connected to the electrostatic touch drive circuit outside the panel through the wiring. To be done.

FIG. 16 shows a schematic plan view of the second sensor electrode 27B and the third sensor electrode 41 on the second substrate 31 of the display device according to the fifth embodiment. The second sensor electrodes 27B and the third sensor electrodes 41 provided on the liquid crystal layer side of the second substrate 31 form a pattern in a matrix. The second sensor electrode 27B and the third sensor electrode 41 have a so-called single layer structure provided by the same metal layer, and each sensor electrode is drawn out to the peripheral region Gd by a wiring, and the conducting portion 81 (not shown) in the peripheral region Gd. ) To the first substrate 21, and then to the flexible substrate 110 through the wiring. The finely divided third sensor electrode 41 is drawn out to the flexible substrate 110 through the wiring, and is electrically connected on the flexible substrate 110 by using the divided electrode pattern arranged in the row direction of the paper surface as one touch drive electrode, and electrostatically. It is connected to the touch drive IC 19A. The second sensor electrode 27B has a coil shape, and wiring is connected from both ends of the coil and is connected to the touch IC 49. In this way, by switching the connection of the second sensor electrode 27B within the touch IC, it can be used as a detection sensor during both electromagnetic induction detection and electrostatic touch detection.

When performing detection by the electromagnetic induction method, a signal is applied to the first sensor electrode 26 provided on the first substrate 21, and the signal is detected from the second sensor electrode 27B via the touch pen 100. When the detection is performed by electrostatic touch, a signal is applied to the third sensor electrode 41, and the variation of the electric field due to the signal can be detected by the second sensor electrode 27B.

In the fifth embodiment, the second sensor electrode 27B and the third sensor electrode 41 are provided on the light-shielding layer 39 closer to the liquid crystal layer than the second substrate 31, but not limited to this, for example, the second substrate 31. Of the second sensor electrode 27B and the third sensor 51 electrode may be disposed between the second substrate 31 and the cover substrate 50. Furthermore, the second sensor electrode 27B and the third sensor electrode 41 do not necessarily have to be formed in the same layer. For example, the second sensor electrode 27B is arranged on the liquid crystal layer side of the second substrate 21 as in the fourth embodiment. However, only the third sensor electrode 41 may be directly formed on the cover substrate 50.

(Sixth Embodiment)
FIG. 17 is a principle diagram showing the principle of the sixth embodiment. In the first to fifth embodiments, the transmitting coil CTx charges the capacitive element 103 in the touch pen 100 based on the principle shown in FIGS. 3 and 4, and the magnetic field from the touch pen 100 intersects the transmitting coil. It was detected by CRx. In the sixth embodiment, two receiving coils CR whose extending directions intersect each other are arranged, and the magnetic field from the touch pen 100 is detected by each of them to detect the position of the pen. A built-in battery may be used to charge the capacitive element 103 included in the touch pen, or may be charged by a separately prepared charging coil (not shown).

When such a detection principle is applied, it is possible to utilize the first sensor electrode 26 as the receiving coil CRx in the sensor panel structures according to the first to fifth embodiments. There is an advantage that the detection time can be shortened as compared with the case where the first sensor electrodes 26 are sequentially driven as transmission coils one by one.

(Seventh embodiment)
The seventh embodiment is an example in which another type of sensor is arranged, unlike the electromagnetic induction type sensor described in the first to sixth embodiments. FIG. 18 is a schematic plan view schematically showing the seventh embodiment. The cross-sectional structure is the same as that of FIG. 5 showing the cross-sectional view of the first embodiment. In the first embodiment, the aluminum layer forming the first sensor electrode 26 and the aluminum forming the second sensor electrode are used to In the seventh embodiment, the fourth sensor electrode 51 is formed in the display area Ad. The fourth sensor electrodes 51 have a so-called strain gauge pattern, and are arranged at a plurality of locations uniformly in the display area Ad. The strain gauge is a pressure sensor that utilizes the change of the resistance value of the metal due to the pressure from the outside, and when the strain gauge is arranged in the display area Ad of the first substrate 21, when the display surface of the display device is strongly pressed from the outside. In addition, it can be detected as an external pressure.

The wiring of the fourth sensor electrode 51 is directly connected to a detector provided outside the display device, and the applied pressure is detected by measuring the resistance value of the fourth sensor electrode 51. Since the fourth sensor electrode 51 is shielded by the shield electrode 24, the signal for displaying and the like do not become noise, and the pressure can be detected with high accuracy.

(Eighth Embodiment)
The electronic devices illustrated in FIGS. 19 and 20 are information portable terminals that operate as portable computers, portable computers capable of voice communication, or portable computers capable of communication, and are sometimes called personal computers or tablet terminals. This portable information terminal has a display unit 111 on the surface of a housing 180, for example. The display unit 111 is the display device 1 with a pen touch detection function and the display device according to the first to seventh embodiments and the modifications.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to such an embodiment. The contents disclosed in the embodiments are merely examples, and various modifications can be made without departing from the spirit of the present invention. Appropriate changes made without departing from the spirit of the present invention naturally belong to the technical scope of the present invention.

1 Display Device 2 Pixel Substrate 3 Counter Substrate 6 Liquid Crystal Layer 10 Display Panel 11 Control Section 12 Gate Driver 13 Source Driver 14 Drive Circuit 19 Drive IC
21 first substrate 23, 23A insulating film 24, shield electrode 25 pixel electrode 26 first sensor electrode 26W first sensor wiring 27, 27A, 27B second sensor electrode 27W second sensor wiring 27Ba connecting portion 28 alignment film 29 flattening film 31 Second Substrate 32, 32R, 32G, 32B Color Filter 35 Insulating Film 36 Polarizing Plate 38 Alignment Film 39 Light-Shielding Layer 40 Detecting Section 41 Third Sensor Electrode 42 Amplifier 43 A/D Converting Section 44 Signal Processing Section 45 Coordinate Extracting Section 46 Detection timing control unit 47 First AFE
48 Multiplexer 49 Touch IC
50 Cover Substrate 51 Fourth Sensor Electrode 52 Liquid Crystal Element 53 Storage Capacitance 55 Adhesive Layer 71 Conductive Layer 72 Sensor Conductive Section 80 Peripheral Circuit Area 81 Conductive Section 82 Conductive Particle 100 Touch Pen 101 Resonance Circuit 102 Coil 103 Capacitive Element 110 Flexible Board 111 Display Section 180 housing Ad display area Gd peripheral area COML common electrode CT, CTx transmission coil CR, CRx reception coil DET voltage detector SGL signal line GCL gate line SI silicon layer DR drain line CH, CHA contact hole Tr switching element SPix subpixel Pix Pixel VTx detection drive signal Vcomdc Display drive signal Vscan Scan signal Vdet Detection signal Vpix Pixel signal Vout Output signal

Claims (12)

A first substrate, a plurality of first sensor electrodes, a plurality of pixel electrodes, a display function layer, a shield electrode, and a second substrate, the first substrate, the plurality of first sensor electrodes, the shield electrode , A plurality of the pixel electrodes, the display function layer, and the second substrate are provided in this order so as to overlap with each other, and a potential variation from the first sensor electrode to the pixel electrodes is shielded by the shield electrode. Display device. The first analog front-end circuit according to claim 1, further comprising a plurality of second sensor electrodes intersecting the first sensor electrodes in a plan view, and further comprising a first analog front end circuit connected to the plurality of second sensor electrodes. Display device with sensing function. The display device with a sensing function according to claim 2, wherein the second sensor electrode is formed between the substrate and the shield electrode. The display device with a sensing function according to claim 2, wherein at least a part of the second sensor electrode is formed of an electrode in the same layer as the shield electrode. The sensing according to claim 2, wherein the second sensor electrode is provided on the second substrate side with respect to the display function layer and at least partially overlaps with a light shielding layer provided on the second substrate in a plan view. Display device with functions. A plurality of third sensor electrodes are provided on the second substrate side with respect to the display function layer, the third sensor electrode and the second sensor electrode form a capacitance, and the third electrode is provided by the control unit. The display device with a sensing function according to claim 5, wherein a signal is supplied according to a control signal, and capacitance detection is performed by a third analog front end circuit connected to the second sensor electrode. The display device with a sensing function according to claim 5, wherein the second sensor electrode and the third sensor electrode are formed of a metal or semiconductor electrode in the same layer. A signal is supplied to the first sensor electrode in response to a control signal from the control unit, electromagnetic induction is formed, and the signal is detected by the first analog front end circuit connected to the second sensor electrode. The display device with a sensing function according to claim 2. The sensing function according to claim 2, further comprising a second analog front end circuit connected to the first sensor electrode, and detecting a magnetic field signal from the outside in combination with the second sensor electrode intersecting in a plan view. Display device. The display device with a sensing function according to claim 1, wherein the first sensor electrode is connected to a detector that detects a resistance value of the first sensor electrode. At least a part of the pixel electrode has a reflective region provided with a metal that reflects light from above, and the first sensor electrode and the reflective region at least partially overlap each other in a plan view. The display device with a sensing function according to claim 1, further comprising a common electrode between the layer and the second substrate. An electronic device comprising the display device with a sensing function according to claim 1.