JP6744169B2 - Detection device and display device - Google Patents

Description

The present invention relates to a detection device capable of detecting an external proximity object, and particularly to a detection device and a display device capable of detecting an external proximity object based on a change in capacitance.

In recent years, a detection device called a touch panel, which can detect an external proximity object, has attracted attention. A touch panel is used for a display device with a touch detection function, which is mounted on or integrated with a display device such as a liquid crystal display device. The display device with a touch detection function allows various information such as button images to be displayed on the display device, and allows the touch panel to be used as a substitute for a normal mechanical button to input information. A display device with a touch detection function that has such a touch panel does not require an input device such as a keyboard, a mouse, or a keypad, and is therefore widely used in personal computers such as computers and personal digital assistants such as mobile phones. Tend to do.

There are several types of touch detection devices such as an optical type, a resistance type, and a capacitance type. The capacitive touch detection device has a relatively simple structure and can realize low power consumption when used in a mobile terminal or the like. For example, Patent Document 1 describes a touch panel in which a transparent electrode pattern is made invisible.

Further, in a detection device capable of detecting an external proximity object, the resistance of the detection electrode is required to be low in order to reduce the thickness, increase the screen size, and increase the definition. The detection electrode uses a transparent conductive oxide such as ITO (Indium Tin Oxide) as a material of the transparent electrode. In order to reduce the resistance of the detection electrode, it is effective to use a conductive material such as a metal material. However, when a conductive material such as a metal material is used, moire may be visually recognized due to interference between the pixels of the display device and the conductive material such as a metal material.

JP, 2010-197576, A JP, 2014-041589, A

Therefore, Patent Document 2 describes a detection device capable of reducing the possibility that moire is visually recognized even if the detection electrode is made of a conductive material such as a metal material. In the detection device described in Patent Document 2, although the possibility that moire is visually recognized can be reduced, the light intensity pattern that is diffracted or scattered by the plurality of detection electrodes when visible light is incident is close to a plurality of scattered light points. , The point of light may be visible.

The present invention has been made in view of the above problems, and an object thereof is to reduce the possibility that a plurality of scattered light spots are visually recognized while using a detection electrode made of a conductive material such as a metal material. An object of the present invention is to provide a detection device and a display device capable of detecting an external proximity object.

According to the first aspect, the detection device includes a substrate, a plurality of first conductive thin wires provided on a surface parallel to the substrate and extending in the first direction, and the same layer as the first conductive thin wires. A plurality of second conductive thin wires that are provided above and extend in a second direction that forms an angle with the first direction, and are arranged in a first band-shaped region having a predetermined width, and are displaced from each other at least in the second direction. A first group including the two first conductive thin wires and a second group including two second conductive thin wires arranged in a second band-shaped region having a predetermined width and displaced from each other at least in the first direction. And the first conductive thin line and the second conductive thin line are in contact with each other in an intersecting region of the first strip-shaped region and the second strip-shaped region.

According to the second aspect, the display device includes a detection device and a display region, and the first conductive thin line and the second conductive thin line are provided in a region overlapping with the display region. ..

FIG. 1 is a block diagram illustrating a configuration example of a display device with a touch detection function according to the first embodiment. FIG. 2 is an explanatory diagram showing a state in which a finger is not in contact with or in proximity to the basic principle of the capacitive touch detection method. FIG. 3 is an explanatory diagram showing an example of an equivalent circuit in a state where the finger shown in FIG. 2 is not in contact with or approaching. FIG. 4 is an explanatory diagram showing a state in which a finger is in contact with or in proximity to, in order to explain the basic principle of the capacitive touch detection method. FIG. 5 is an explanatory diagram showing an example of an equivalent circuit in a state where the finger shown in FIG. FIG. 6 is a diagram illustrating an example of waveforms of the drive signal and the detection signal. FIG. 7 is a diagram showing an example of a module in which a display device with a touch detection function is mounted. FIG. 8 is a diagram showing an example of a module in which a display device with a touch detection function is mounted. FIG. 9 is a sectional view showing a schematic sectional structure of the display device with a touch detection function according to the first embodiment. FIG. 10 is a circuit diagram showing a pixel arrangement of the display device with a touch detection function according to the first embodiment. FIG. 11 is a plan view of the detection electrode according to the first embodiment. FIG. 12 is a process diagram for explaining the method of arranging the detection electrodes according to the first embodiment. FIG. 13 is a plan view of the detection electrode according to the second embodiment. FIG. 14 is a plan view of the detection electrode according to the first modification of the second embodiment. FIG. 15 is a plan view of the detection electrode according to the second modification of the second embodiment. FIG. 16 is a plan view of the detection electrode according to the third embodiment. FIG. 17 is a plan view of the detection electrode according to the fourth embodiment. FIG. 18 is a plan view of the detection electrode according to the fifth embodiment. FIG. 19 is a plan view of the detection electrode according to the sixth embodiment. FIG. 20 is an explanatory diagram showing an example of an equivalent circuit for self-capacitive touch detection.

Hereinafter, modes for carrying out the invention (embodiments) 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 skilled in the art can easily think of appropriate modifications while keeping the gist of the invention, of course, is included in the scope of the invention. In addition, 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 already-explained drawings are designated by the same reference numerals, and detailed description thereof may be appropriately omitted.

(Embodiment 1)
FIG. 1 is a block diagram illustrating a configuration example of a display device with a touch detection function according to the first embodiment. The display device with a touch detection function 1 includes a display unit with a touch detection function 10, a control unit 11, a gate driver 12, a source driver 13, a drive electrode driver 14, and a touch detection unit (also simply referred to as a detection unit. ) 40 and. The display unit 10 with a touch detection function is a device in which a display device 20 which is a so-called liquid crystal display device and a capacitance type detection device 30 are integrated. The display unit with a touch detection function 10 may be a device in which the electrostatic capacitance type detection device 30 is mounted on the display device 20. The display device 20 may be, for example, an organic EL display device. The gate driver 12, the source driver 13, or the drive electrode driver 14 may be provided in the display unit 10.

As will be described later, the display device 20 is a device that sequentially scans and displays one horizontal line at a time according to a scanning signal Vscan supplied from the gate driver 12. The control unit 11 supplies control signals to the gate driver 12, the source driver 13, the drive electrode driver 14, and the touch detection unit 40 based on the video signal Vdisp supplied from the outside, and these are synchronized with each other. It is a circuit (control device) for controlling so as to operate as follows.

The gate driver 12 has a function of sequentially selecting one horizontal line to be a display drive target of the display unit 10 with a touch detection function, 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, which will be described later, of the display unit 10 with a touch detection function, based on a control signal supplied from the control unit 11.

The drive electrode driver 14 is a circuit that supplies a drive signal Vcom to drive electrodes COML, which will be described later, of the display unit 10 with a touch detection function, based on a control signal supplied from the control unit 11.

The touch detection unit 40 touches the detection device 30 based on the control signal supplied from the control unit 11 and the detection signal Vdet supplied from the detection device 30 of the display unit 10 with a touch detection function (contact or proximity described later). The state of) is detected, and when there is a touch, the coordinates of the touch detection area are obtained. The touch detection unit 40 includes a detection signal amplification unit 42, an A/D conversion unit 43, a signal processing unit 44, a coordinate extraction unit 45, and a detection timing control unit 46.

The detection signal amplifier 42 amplifies the detection signal Vdet supplied from the detection device 30. The detection signal amplifier 42 may include a low-pass analog filter that removes high frequency components (noise components) included in the detection signal Vdet, extracts touch components, and outputs the touch components.

(Basic principle of capacitive touch detection)
The detection device 30 operates based on the basic principle of capacitance type proximity detection and outputs a detection signal Vdet. A basic principle of touch detection in the display unit 10 with a touch detection function according to the first embodiment will be described with reference to FIGS. FIG. 2 is an explanatory diagram showing a state in which an external object, for example, a finger is not in contact with or in proximity, in order to explain the basic principle of the capacitive touch detection method. FIG. 3 is an explanatory diagram showing an example of an equivalent circuit in a state where the finger shown in FIG. 2 is not in contact with or approaching. FIG. 4 is an explanatory diagram showing a state in which a finger is in contact with or in proximity to, in order to explain the basic principle of the capacitive touch detection method. FIG. 5 is an explanatory diagram showing an example of an equivalent circuit in a state where the finger shown in FIG. FIG. 6 is a diagram illustrating an example of waveforms of the drive signal and the detection signal. It should be noted that the external object may be any object that generates a capacitance described below, and examples thereof include the above-mentioned finger and stylus. In the present embodiment, a finger will be described as an example of the external object.

For example, as shown in FIGS. 3 and 5, the capacitive element C1 and the capacitive element C1' include a drive electrode E1 and a detection electrode E2 as a pair of electrodes that are arranged to face each other with a dielectric D in between. As shown in FIG. 3, one end of the capacitive element C1 is connected to the AC signal source (driving signal source) S and the other end is connected to the voltage detector (touch detection unit) DET. The voltage detector DET is, for example, an integrating circuit included in the detection signal amplifier 42 shown in FIG.

When an AC rectangular wave Sg having a predetermined frequency (eg, 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 detection electrode E2 (the other end of the capacitive element C1) side is applied. An output waveform (detection signal Vdet1) appears via the voltage detector DET connected to.

In a state where the finger is not in contact (or in proximity) (non-contact state), as shown in FIGS. 2 and 3, as the capacitor C1 is charged and discharged, a current I ₀ corresponding to the capacitance value of the capacitor C1 is generated. Flows. As shown in FIG. 6, the voltage detector DET converts the fluctuation of the current I ₀ according to the AC rectangular wave Sg into the fluctuation of the voltage (waveform V _{0 of the} solid line).

On the other hand, when the finger is in contact (or in proximity) (contact state), the capacitance C2 formed by the finger is in contact with or in the vicinity of the detection electrode E2 as shown in FIG. The fringe capacitance between E1 and the detection electrode E2 is blocked. Therefore, the capacitance value of the capacitive element C1′ becomes smaller than the capacitance value of the capacitive element C1. Then, in the equivalent circuit shown in FIG. 5, the current I ₁ flows through the capacitive element C1′. As shown in FIG. 6, the voltage detector DET converts the fluctuation of the current I ₁ according to the AC rectangular wave Sg into the fluctuation of the voltage (dotted line waveform V ₁ ). In this case, the waveform V ₁ has a smaller amplitude than the waveform V ₀ described above. As a result, the absolute value |ΔV| of the voltage difference between the waveform V ₀ and the waveform V ₁ changes according to the influence of an object approaching from the outside such as a finger. It is preferable that the voltage detector DET accurately detect the absolute value |ΔV| of the voltage difference between the waveform V ₀ and the waveform V ₁ . For this reason, it is more preferable to provide a period Reset for resetting the charge/discharge of the capacitor in accordance with the frequency of the AC rectangular wave Sg by switching in the circuit.

The detection device 30 illustrated in FIG. 1 sequentially scans one detection block at a time according to the drive signal Vcom supplied from the drive electrode driver 14 to perform touch detection.

The detection device 30 outputs a detection signal Vdet1 for each detection block from a plurality of detection electrodes TDL described later via the voltage detector DET shown in FIG. 3 or 5, and the A/D conversion unit of the touch detection unit 40. 43.

The A/D conversion unit 43 is a circuit that samples the analog signals output from the detection signal amplification unit 42 and converts the analog signals into digital signals at the timing synchronized with the drive signal Vcom.

The signal processing unit 44 includes a digital filter that reduces frequency components (noise components) included in the output signal of the A/D conversion unit 43 other than the frequency at which the drive signal Vcom is sampled. The signal processing unit 44 is a logic circuit that detects the presence or absence of a touch on the detection device 30 based on the output signal of the A/D conversion unit 43. The signal processing unit 44 performs a process of extracting only the voltage difference of the finger. The voltage difference due to the finger is the absolute value |ΔV| of the difference between the waveform V ₀ and the waveform V ₁ described above. The signal processing unit 44 may calculate the average value of the absolute values |ΔV| per detection block to obtain the average value of the absolute values |ΔV|. Thereby, the signal processing unit 44 can reduce the influence of noise. The signal processing unit 44 compares the detected voltage difference due to the finger with a predetermined threshold voltage, and if the voltage is equal to or higher than this threshold voltage, the signal processing unit 44 determines that the contact state of a finger approaching from the outside, If it is less than, it is determined that the finger is not in contact. In this way, the touch detection unit 40 can perform touch detection.

The coordinate extracting unit 45 is a logic circuit that obtains touch panel coordinates when a touch is detected by the signal processing unit 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 with each other. The coordinate extraction unit 45 outputs the touch panel coordinates as a signal output Vout.

7 and 8 are plan views showing an example of a module in which the display device with a touch detection function according to the first embodiment is mounted. FIG. 7 is a plan view showing an example of drive electrodes, and FIG. 8 is a plan view showing an example of detection electrodes.

As shown in FIG. 7, the display device 1 with a touch detection function includes a TFT (Thin Film Transistor) substrate 21 and a flexible printed circuit board 72. A COG (Chip On Glass) 19 is mounted on the TFT substrate 21, and a region corresponding to a display region 10a of the display device 20 (see FIG. 1) and a frame region 10b surrounding the display region 10a is formed. The COG 19 is an IC driver chip mounted on the TFT substrate 21, and incorporates each circuit required for display operation, such as the control unit 11, the gate driver 12, and the source driver 13 shown in FIG. In addition, in the present embodiment, the gate driver 12, the source driver 13, or the drive electrode driver 14 may be formed on the TFT substrate 21 which is a glass substrate. The COG 19 and the drive electrode driver 14 are provided in the frame region 10b. The COG 19 may include the drive electrode driver 14 therein. In this case, the frame area 10b can be narrowed. The flexible printed circuit board 72 is connected to the COG 19, and the video signal Vdisp and the power supply voltage are externally supplied to the COG 19 via the flexible printed circuit board 72.

As shown in FIG. 7, the display unit with a touch detection function 10 is provided with a plurality of drive electrodes COML in a region overlapping the display region 10a. Each of the plurality of drive electrodes COML extends in the direction along one side of the display region 10a, and is arranged at intervals in the direction along the other side of the display region 10a. The plurality of drive electrodes COML are connected to the drive electrode driver 14, respectively.

As shown in FIG. 8, the display device with a touch detection function 1 further includes a substrate 31 and a flexible printed circuit board 71. The touch detection unit 40 described above is mounted on the flexible printed circuit board 71. The touch detection unit 40 may not be mounted on the flexible printed board 71, and may be mounted on another board to which the flexible printed board 71 is connected. The substrate 31 is, for example, a translucent glass substrate, and faces the TFT substrate 21 in the direction perpendicular to the surface of the TFT substrate 21 shown in FIG. 7. As shown in FIG. 8, the display unit with a touch detection function 10 is provided with a plurality of detection electrodes TDL in a region overlapping with the display region 10a. Each of the plurality of detection electrodes TDL extends in a direction intersecting the extension direction of the drive electrode COML shown in FIG. 7. As shown in FIG. 8, there is a space SP between adjacent detection electrodes TDL. Further, the plurality of detection electrodes TDL are arranged at intervals in the extending direction of the drive electrodes COML. That is, the plurality of drive electrodes COML and the plurality of detection electrodes TDL are arranged so as to intersect with each other in a three-dimensional manner, and the electrostatic capacitance is formed in a portion where they overlap each other.

As will be described later, the display device with a touch detection function 1 sequentially scans one horizontal line at the time of display operation. That is, the display device with a touch detection function 1 performs display scanning parallel to the direction along one side of the display unit with a touch detection function 10 (see FIG. 8 ). On the other hand, the display device with a touch detection function 1 sequentially applies the drive signal Vcom from the drive electrode driver 14 to the drive electrode COML during the touch detection operation, thereby sequentially scanning one detection line at a time. That is, the display unit with a touch detection function 10 scans in the direction SCAN in parallel with the direction along the other side of the display unit with a touch detection function 10 (see FIG. 7 ).

As shown in FIG. 8, the detection electrode TDL of the present embodiment has a plurality of first conductive thin wires 33U and a plurality of second conductive thin wires 33V. The first conductive thin wire 33U and the second conductive thin wire 33V are inclined in directions opposite to each other with respect to the direction parallel to one side of the display region 10a.

Each of the plurality of first conductive thin wires 33U and the second conductive thin wires 33V has a narrow width, and in the display region 10a, a direction intersecting the extending direction of the first conductive thin wires 33U and the second conductive thin wires 33V ( The display areas 10a are arranged at intervals in the short side direction of the display area 10a. Both ends of the plurality of first conductive thin wires 33U and the second conductive thin wires 33V in the extending direction are connected to the connection wirings 34a and 34b arranged in the frame region 10b. Accordingly, the plurality of first conductive thin wires 33U and the second conductive thin wires 33V are electrically connected to each other and function as one detection electrode TDL. A wiring 37 is connected to each of the plurality of connection wirings 34 a, and the detection electrode TDL and the flexible printed board 71 are connected by the wiring 37. A part of the detection electrodes TDL may be arranged outside the display area 10a (frame area 10b). Further, the connection wiring 34a and the connection wiring 34b may be arranged in the display area 10a instead of the frame area 10b. The plurality of connection wirings 34a and the connection wirings 34b are connected to the touch detection unit 40 via the wiring 37, and connect the plurality of first conductive thin wires 33U and the second conductive thin wires 33V to the touch detection unit 40. It may be a wiring for doing.

FIG. 9 is a sectional view showing a schematic sectional structure of a display device with a touch detection function. As shown in FIG. 9, the display unit with a touch detection function 10 includes a pixel substrate 2, a counter substrate 3 arranged to face the surface of the pixel substrate 2 in a direction perpendicular to the surface, a pixel substrate 2 and a counter substrate 3. And a liquid crystal layer 6 provided between and.

The pixel substrate 2 includes a TFT substrate 21 as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix above the TFT substrate 21, and a plurality of pixel electrodes 22 formed between the TFT substrate 21 and the pixel electrodes 22. The drive electrode COML and the insulating layer 24 that insulates the pixel electrode 22 and the drive electrode COML are included. A polarizing plate 65 is provided below the TFT substrate 21 via an adhesive layer 66.

The counter substrate 3 includes a substrate 31 and a color filter 32 formed on one surface of the substrate 31. The detection electrode TDL of the detection device 30 is formed on the other surface of the substrate 31. As shown in FIG. 9, the detection electrode TDL is provided above the substrate 31. Further, a protective layer 38 for protecting the first conductive thin wire 33U and the second conductive thin wire 33V of the detection electrode TDL is provided on the detection electrode TDL. For the protective layer 38, a translucent resin such as an acrylic resin can be used. The polarizing plate 35 is provided on the protective layer 38 with the adhesive layer 39 interposed therebetween.

The TFT substrate 21 and the substrate 31 are arranged to face each other with a predetermined space provided by a spacer 61. The liquid crystal layer 6 is provided in the space surrounded by the TFT substrate 21, the substrate 31, and the spacer 61. The liquid crystal layer 6 modulates light passing therethrough according to the state of an electric field, and for example, a display using a horizontal electric field mode liquid crystal such as IPS (in-plane switching) including FFS (fringe field switching). Panels are used. Alignment films may be provided between the liquid crystal layer 6 and the pixel substrate 2 shown in FIG. 9, and between the liquid crystal layer 6 and the counter substrate 3, respectively.

FIG. 10 is a circuit diagram showing a pixel arrangement of the display device with a touch detection function according to the first embodiment. On the TFT substrate 21 shown in FIG. 9, the thin film transistor element (hereinafter referred to as TFT element) Tr of each sub-pixel SPix shown in FIG. 10, the pixel signal line SGL which supplies the pixel signal Vpix to each pixel electrode 22, and each TFT element Tr are provided. Wirings such as the scanning signal line GCL to be driven are formed. The pixel signal line SGL and the scanning signal line GCL extend in a plane parallel to the surface of the TFT substrate 21. The direction orthogonal to the arrangement direction of the sub-pixels SPix shown in FIG. 10 (the extending direction of the scanning signal line GCL) is shown as the direction Dx, and the arrangement direction of the sub-pixels SPix (the extending direction of the pixel signal line SGL) is shown as the direction Dy. ing. In the present embodiment, the direction Dy is a direction in which color regions (described later) having the highest human visibility are arranged. The direction Dx is a direction orthogonal to the direction Dy on a plane parallel to the surface of the counter substrate 3.

The display device 20 shown in FIG. 10 has a plurality of sub-pixels SPix arranged in a matrix. Each sub-pixel SPix includes a TFT element Tr and a liquid crystal element LC. The TFT 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. One of the source and the drain of the TFT element Tr is connected to the pixel signal line SGL, the gate is connected to the scanning signal line GCL, and the other of the source and the drain is connected to one end of the liquid crystal element LC. The liquid crystal element LC has one end connected to the other of the source and the drain of the TFT element Tr and the other end connected to the drive electrode COML.

The sub-pixel SPix is connected to another sub-pixel SPix belonging to the same row of the display device 20 by the scanning signal line GCL. The scanning signal line GCL is connected to the gate driver 12 (see FIG. 1), and the scanning signal Vscan is supplied from the gate driver 12. Further, the sub-pixel SPix is connected to another sub-pixel SPix belonging to the same column of the display device 20 by the pixel signal line SGL. The pixel signal line SGL is connected to the source driver 13 (see FIG. 1), and the pixel signal Vpix is supplied from the source driver 13. Further, the sub-pixel SPix is connected to another sub-pixel SPix belonging to the same row by the drive electrode COML. The drive electrode COML is connected to the drive electrode driver 14 (see FIG. 1), and the drive signal Vcom is supplied from the drive electrode driver 14. That is, in this example, the plurality of sub-pixels SPix belonging to the same row share one drive electrode COML. The extending direction of the drive electrode COML of this embodiment is parallel to the extending direction of the scanning signal line GCL. The extending direction of the drive electrode COML of the present embodiment is not limited to this. For example, the extending direction of the drive electrode COML may be a direction parallel to the extending direction of the pixel signal line SGL.

The gate driver 12 shown in FIG. 1 drives the scanning signal line GCL so as to sequentially scan. The scanning signal Vscan (see FIG. 1) is applied to the gate of the TFT element Tr of the sub-pixel SPix via the scanning signal line GCL, and one horizontal line of the sub-pixel SPix is sequentially selected as a display drive target. .. Further, in the display device with a touch detection function 1, the source driver 13 supplies the pixel signal Vpix to the sub-pixels SPix belonging to one horizontal line, so that display is performed one horizontal line at a time. When performing this display operation, the drive electrode driver 14 applies the drive signal Vcom to the drive electrode COML corresponding to the one horizontal line.

In the color filter 32 shown in FIG. 9, for example, color regions 32R, color regions 32G and 32B of color filters colored in three colors of red (R), green (G) and blue (B) are periodically arranged. Has been done. Each of the sub-pixels SPix shown in FIG. 10 described above is associated with a color region 32R of three colors of R, G, B, a color region 32G, and a color region 32B as one set, and a color region 32R, a color region 32G, and a color region. Pixels Pix are configured with 32B as one set. As shown in FIG. 9, the color filter 32 faces the liquid crystal layer 6 in the direction perpendicular to the TFT substrate 21. The color filter 32 may be a combination of other colors as long as it is colored in different colors. Further, the color filter 32 is not limited to the combination of three colors and may be a combination of four or more colors.

FIG. 11 is a plan view of the detection electrode according to the first embodiment. The detection electrode TDL shown in FIG. 11 is a partially enlarged view of the detection electrode TDL shown in FIG. In the detection electrode TDL shown in FIG. 8, the parallelogram looks uniform, but the actual shape of the detection electrode TDL is the shape shown in FIG.

The first conductive thin wire 33U and the second conductive thin wire 33V are one kind selected from aluminum (Al), copper (Cu), silver (Ag), molybdenum (Mo), chromium (Cr) and tungsten (W). It is formed of the above metal layers. Alternatively, the first conductive thin wire 33U and the second conductive thin wire 33V are selected from aluminum (Al), copper (Cu), silver (Ag), molybdenum (Mo), chromium (Cr), and tungsten (W). It is formed of an alloy of metallic materials containing one or more kinds. The first conductive thin wire 33U and the second conductive thin wire 33V are selected from aluminum (Al), copper (Cu), silver (Ag), molybdenum (Mo), chromium (Cr) and tungsten (W). Further, it may be a laminated body in which a plurality of conductive layers of one or more kinds of metal materials or alloys containing one or more kinds of these materials are laminated. The first conductive thin wire 33U and the second conductive thin wire 33V are, in addition to the conductive layer made of the metal material or the alloy of the metal material described above, a conductive layer made of a transparent conductive oxide such as ITO (Indium Tin Oxide). May be laminated. Further, a blackening film, a black organic film, or a black conductive organic film, which is a combination of the metal material and the conductive layer described above, may be laminated.

The metal material described above has a lower resistance than a transparent conductive oxide such as ITO as a material of the transparent electrode. Since the above-mentioned metal material has a light-shielding property as compared with the translucent conductive oxide, the transmissivity may decrease or the pattern of the detection electrode TDL may be visually recognized. In the present embodiment, one detection electrode TDL has a plurality of narrow first conductive thin wires 33U and a plurality of second conductive thin wires 33V, and the first conductive thin wires 33U and the second conductive thin wires 33U. By arranging 33V with an interval larger than the line width, low resistance and invisibility can be realized. As a result, the detection electrode TDL has a low resistance, and the display device 1 with a touch detection function can be made thin, have a large screen, or have high definition.

The width of the first conductive thin wire 33U and the second conductive thin wire 33V is preferably 1 μm or more and 10 μm or less, and more preferably 1 μm or more and 5 μm or less. When the width of the first conductive thin line 33U and the second conductive thin line 33V is 10 μm or less, in the display region 10a, the black matrix or a region where light transmission is not suppressed by the scanning signal line GCL and the pixel signal line SGL described later. This is because the area that covers a certain opening is reduced, and the possibility of impairing the opening ratio is reduced. Further, when the width of the first conductive thin wire 33U and the second conductive thin wire 33V is 1 μm or more, the shapes are stable and the possibility of disconnection is reduced.

Explaining with reference to FIG. 8, FIG. 10 and FIG. 11, the detection electrode TDL has a plurality of first conductive thin wires 33U and second conductive thin wires 33V arranged at a predetermined pitch. As a whole, the color regions 32R, 32G, and 32B of the color filter 32 extend in a direction parallel to the extending direction of the color regions 32R, 32G, and 32B. That is, the detection electrode TDL extends in a direction parallel to the direction Dy in which the pixel signal line SGL shown in FIG. 10 extends. The first conductive thin wires 33U and the second conductive thin wires 33V are opposite to each other so that each of the first conductive thin wires 33U and the second conductive thin wires 33V does not block a specific color region of the color filter 32. It has a mesh-like shape in which thin wire pieces that incline to each other intersect. The first conductive thin wires 33U and the second conductive thin wires 33V are opposite to each other with an angle θ with respect to a direction parallel to the extending direction (direction Dy) of the color regions 32R, 32G, and 32B. Inclining in the direction Du and the direction Dv. The electrical connection portion 33x is formed at a location where the first conductive thin wire 33U and the second conductive thin wire 33V are electrically connected. For example, the angle θ is 5 degrees or more and 75 degrees or less, preferably 25 degrees or more and 40 degrees or less, and more preferably 50 degrees or more and 65 degrees or less.

Thus, the detection electrode TDL includes at least one first conductive thin wire 33U extending in the direction Du and at least one second conductive thin wire 33V intersecting the first conductive thin wire 33U and extending in the direction Dv. Including. When each of the plurality of first conductive thin wires 33U and each of the plurality of second conductive thin wires 33V cross each other, one mesh shape of the detection electrode TDL becomes a parallelogram.

In the present embodiment, when the electrical connection portion 33x closest to the connection wiring 34a is used as a boundary, the side closer to the connection wiring 34a than the electrical connection portion 33x closest to the connection wiring 34a is the closest to the connection wiring 34a. The region from the nearby electrical connection portion 33x to the connection wiring 34a is the end region 10c of the detection electrode TDL (see FIG. 11). Similarly, the area farther from the connection wiring 34a than the electrical connection portion 33x closest to the connection wiring 34a is the main detection area 10d of the detection electrode TDL.

The pattern of the detection electrodes TDL around the connection wiring 34a and the pattern of the detection electrodes around the connection wiring 34b are line-symmetrical or point-symmetrical as shown in FIG. Therefore, with the electrical connection portion 33x closest to the connection wiring 34b as a boundary, a region closer to the connection wiring 34b than the electrical connection portion 33x closest to the connection wiring 34b and a region up to the connection wiring 34b is an end of the detection electrode TDL. It is a partial area. Similarly, the area farther from the connection wiring 34b than the electrical connection portion 33x closest to the connection wiring 34b is the main detection area of the detection electrode TDL.

As shown in FIG. 11, in the end region 10c of the detection electrode TDL, the conductive thin wire 33a is arranged at a position where the first conductive thin wire 33U is extended, and the connection wiring 34a and the first conductive area of the main detection region 10d are conductive. The thin wire 33U is electrically connected to the thin wire 33U through the conductive thin wire 33a.

The drive electrode COML shown in FIGS. 7 and 9 functions as a common electrode that applies a common electric potential to the plurality of pixel electrodes 22 of the display device 20, and at the time of performing touch detection by the mutual capacitance method of the detection device 30. It also functions as a drive electrode. The detection device 30 includes a drive electrode COML provided on the pixel substrate 2 and a detection electrode TDL provided on the counter substrate 3.

The drive electrode COML is divided into a plurality of electrode patterns extending in a direction parallel to the other side of the display area 10a shown in FIG. The detection electrode TDL is composed of an electrode pattern having a plurality of metal wirings extending in a direction intersecting the extending direction of the electrode pattern of the drive electrode COML. The detection electrode TDL faces the drive electrode COML in the direction perpendicular to the surface of the TFT substrate 21 (see FIG. 9). Each electrode pattern of the detection electrode TDL is connected to the input of the detection signal amplification section 42 of the touch detection section 40 (see FIG. 1). The electrode patterns intersecting with each other by the drive electrode COML and the detection electrode TDL generate a capacitance at the intersection.

For the drive electrode COML, for example, a light-transmitting conductive material such as ITO is used. The detection electrode TDL and the drive electrode COML (drive electrode block) are not limited to the shape divided into a plurality of stripes. For example, the detection electrode TDL and the drive electrode COML may be comb-shaped. Alternatively, the detection electrode TDL and the drive electrode COML may be divided into a plurality of pieces, and the shape of the slit dividing the drive electrode COML may be a straight line or a curved line.

With this configuration, in the detection device 30, when the touch detection operation of the mutual capacitance method is performed, the drive electrode driver 14 drives the drive electrode block so as to sequentially scan in a time-division manner, so that one of the drive electrodes COML is detected. The detection blocks are sequentially selected. Then, the detection signal Vdet1 is output from the detection electrode TDL, so that the touch detection of one detection block is performed. That is, the drive electrode block corresponds to the drive electrode E1 in the basic principle of the touch detection of the mutual capacitance method described above, and the detection electrode TDL corresponds to the detection electrode E2. The detection device 30 detects a touch input according to this basic principle. The detection electrodes TDL and the drive electrodes COML that intersect each other three-dimensionally form a capacitive touch sensor in a matrix. Therefore, by scanning over the entire touch detection surface of the detection device 30, it is possible to detect the position where contact or proximity of the conductor from the outside occurs.

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

In the present embodiment, the drive electrode COML also serves as the common electrode of the display device 20, and therefore the control unit 11 displays the drive electrode COML selected via the drive electrode driver 14 during the display operation period. The drive signal Vcom, which is the common electrode potential, is supplied.

When the detection operation is performed only by the detection electrode TDL without using the drive electrode COML in the detection period, for example, when the touch detection is performed based on the touch detection principle of the self-capacitance method described later, the drive electrode driver 14 detects The drive signal Vcom for touch detection may be supplied to the electrode TDL.

Thus, the extending direction of the first conductive thin wire 33U and the second conductive thin wire 33V of the detection electrode TDL is the extending direction (direction Dy) of each color region 32R, color region 32G, and color region 32B of the color filter 32. Forms an angle θ. As a result, the first conductive thin wire 33U and the second conductive thin wire 33V of the detection electrode TDL sequentially shield the respective color regions 32R, 32G, and 32B of the color filter 32 from light, and thus the specific color of the color filter 32. It is possible to suppress a decrease in transmittance in the region. As a result, in the detection device according to the first embodiment, the bright and dark patterns are less likely to have a constant cycle, and the possibility that moire is visually recognized can be reduced.

In the technique described in Patent Document 1, when visible light is incident, the light intensity pattern that is diffracted or scattered by the plurality of detection electrodes becomes close to a plurality of scattered light points. By tilting the detection device itself by the viewer, the position or number of scattered light points of the plurality of light intensity patterns can be changed, but it is difficult to reduce the visibility of the light points of the plurality of light intensity patterns. .. In the technique described in Patent Document 1, the angle formed by the adjacent thin wire pieces a and b is random. Therefore, it is considered that when the viewer tilts the detection device itself, new diffraction or scattering is likely to occur and light spots of a plurality of scattered light intensity patterns are likely to appear.

On the other hand, the angle θ formed by the first conductive thin wire 33U and the second conductive thin wire 33V of the first embodiment with respect to the direction Dy is constant. Therefore, when visible light enters the first conductive thin wires 33U and the second conductive thin wires 33V, the light intensity patterns diffracted or scattered by the respective first conductive thin wires 33U and the second conductive thin wires 33V diffuse. It becomes difficult. Furthermore, the light intensity patterns diffracted or scattered by the respective first conductive thin wires 33U and the second conductive thin wires 33V are likely to gather in four directions, and a certain directivity is likely to be exhibited. Then, when the viewer tilts the detection device 30 itself according to the first embodiment, it becomes easy to avoid an angle at which the light intensity pattern is likely to appear.

Therefore, the plurality of first conductive thin wires 33U of the first embodiment are arranged in the first strip-shaped area UA having the predetermined width WU, and include the plurality of first conductive thin wires 33U that are displaced from each other at least in the direction Dv. One group GU is formed (see FIG. 11).

Similarly, the plurality of second conductive thin wires 33V of the first embodiment are arranged in the second strip-shaped area VA having the predetermined width WV, and include a plurality of second conductive thin wires 33V displaced from each other at least in the direction Du. The second group GV is formed (see FIG. 11).

FIG. 12 is a process diagram for explaining the method of arranging the detection electrodes according to the first embodiment. The plurality of first reference lines 33SU shown in FIGS. 11 and 12 are virtual lines that are arranged at equal pitches in the direction Dv and extend in the direction Du. The first reference line 33SU is a straight line that bisects the first strip area UA in the width direction (direction Dv). Similarly, the plurality of second reference lines 33SV are virtual lines that are arranged at equal pitches in the direction Du and extend in the direction Dv. The second reference line 33SV is a straight line that bisects the second strip area VA in the width direction (direction Du). The predetermined width WU is a width in which the first conductive thin wire 33U may be displaced from the first reference line 33SU when the first reference line 33SU is the center. When the length between two first reference lines 33SU adjacent in the direction Dv is the first reference length SW1, the predetermined width WU is 1/20 or more and 1/5 or less of the first reference length SW1. For example, the predetermined width WU is 10 μm or more and 30 μm or less. The predetermined width WV is a width in which the second conductive thin wire 33V may be displaced from the second reference line 33SV when the second reference line 33SV is the center. When the length between the two second reference lines 33SV adjacent to each other in the direction Du is the second reference length SW2, the predetermined width WV is 1/20 or more and 1/5 or less of the second reference length SW2. For example, the predetermined width WV is 10 μm or more and 30 μm or less.

That is, the length of the first conductive thin wire 33U is equal to or more than the difference between twice the length between the adjacent second reference lines 33SV (second reference length SW2) and the predetermined width WV of the second strip-shaped area VA. Is. In addition, the length of the first conductive thin wire 33U is less than or equal to twice the length between the adjacent second reference lines 33SV (second reference length SW2) and the predetermined width WV of the second strip-shaped area VA. is there. The length of the second conductive thin wire 33V is equal to or more than the difference between twice the length between the adjacent first reference lines SW1 (first reference length SW1) and the predetermined width WU of the first strip-shaped area UA. .. The length of the second conductive thin wire 33V is less than or equal to twice the length between the adjacent first reference lines SW1 (first reference length SW1) and the predetermined width WU of the first strip-shaped area UA. is there.

As shown in FIG. 12, the first end U11 of one first conductive thin wire 33U is arranged at the reference point. At the reference point, an angle formed by the first conductive thin wire 33U with respect to the direction Dx is an angle α. The second end U12 of the first conductive thin wire 33U is arranged at a position of twice the second reference length SW2±length β from the first end U11 of the first conductive thin wire 33U in the direction Du. Here, the length β is within a predetermined width WV/2 and is a length randomly selected. When the position of the second end U12 of the first conductive thin wire 33U is determined, in the direction forming an angle of (90°-α) with respect to the direction Dx from the position of the second end U12 of the first conductive thin wire 33U. The first end U11 of the next first conductive thin wire 33U is arranged at a position within a predetermined width WU/2 and displaced by a randomly selected length γ. By repeating the arrangement method of the detection electrodes TDL described above, the plurality of first conductive thin wires 33U are arranged in one first strip-shaped area UA extending along the direction Du while allowing the first conductive thin wires 33U to be displaced from each other in the direction Dv. It The second conductive thin wire 33V can be similarly arranged.

As shown in FIG. 11, in the intersection area AX where the first strip-shaped area UA and the second strip-shaped area VA intersect, the electrical connection portion 33x where the first conductive thin wire 33U and the second conductive thin wire 33V are in contact with each other. You can Two first conductive thin wires 33U and one second conductive thin wire 33V are in contact with each other in the intersection area AX including the two first conductive thin wires 33U which are displaced from each other in the direction Dv, and thus two electrical connection portions are formed. There is 33x. In the intersection area AX including the two second conductive thin wires 33V which are offset from each other in the direction Du, the two second conductive thin wires 33V and one first conductive thin wire 33U are in contact with each other to form two electrical connection portions. There is 33x. As a result, a portion where the first conductive thin wire 33U and the second conductive thin wire 33V cross each other is suppressed.

That is, four electrical connection portions 33x are generated in one first conductive thin wire 33U. That is, the number of the second conductive thin wires 33V in contact with one first conductive thin wire 33U is four. One first conductive thin wire 33U is in contact with the second conductive thin wire 33V at one end, the other end, and two intermediate places.

Further, four electrical connection portions 33x are formed in one second conductive thin wire 33V. That is, the number of the first conductive thin wires 33U in contact with one second conductive thin wire 33V is four. One second conductive thin wire 33V is in contact with the first conductive thin wire 33U at one end, the other end, and two intermediate places.

(Embodiment 2)
Next, a detection device according to the second embodiment will be described. FIG. 13 is a plan view of the detection electrode according to the second embodiment. In addition, the same components as those described in the first embodiment will be denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 8, there is a space SP between adjacent detection electrodes TDL. In order to prevent the viewer from visually recognizing the interval SP, as shown in FIG. 13, dummy electrodes TDD are arranged.

In the dummy electrode TDD, the plurality of first conductive thin wires 33U are arranged in the first strip-shaped area UA having the predetermined width WV, and the plurality of first conductive thin wires 33U including at least two first conductive thin wires 33U displaced from each other in the direction Dv. A group GU is formed.

Similarly, in the dummy electrode TDD, a plurality of second conductive thin wires 33V are arranged in the second strip-shaped region VA having a predetermined width WU and include a plurality of second conductive thin wires 33V displaced from each other at least in the direction Du. The second group GV is formed.

In the dummy electrode TDD, the slit SL is provided in each of the first conductive thin wire 33U and the second conductive thin wire 33V. The slit SL is a portion where the material forming the first conductive thin wire 33U and the second conductive thin wire 33V is not formed, or is removed by etching or the like, and is a portion having only an insulating material. The slit SL is provided between the adjacent electrical connection portions 33x. Since the distance from the electrical connection portion 33x to the slit SL is constant, it is possible to make the slit SL itself difficult to visually recognize.

Since the dummy electrode TDD is provided with components that extend in the same direction as the first conductive thin wires 33U and the second conductive thin wires 33V that form the detection electrode TDL, it is possible to make the interval SP invisible and to detect the detection electrode. It is possible to reduce the possibility that the TDL is visually recognized.

(Modification 1 of Embodiment 2)
FIG. 14 is a plan view of the detection electrode according to the first modification of the second embodiment. As shown in FIG. 14, in the dummy electrode TDD, the first conductive thin wire 33U sandwiching the slit SL is displaced in the direction Dv. Similarly, in the dummy electrode TDD, the second conductive thin wire 33V sandwiching the slit SL is displaced in the direction Du.

(Modification 2 of Embodiment 2)
FIG. 15 is a plan view of the detection electrode according to the second modification of the second embodiment. As shown in FIG. 15, in the second modification of the second embodiment, the plurality of slits SL are arranged on the straight line LY1, the straight line LY2, or the straight line LY3 parallel to the direction Dy. The straight line LY1 is a virtual straight line positioned at one end of the one detection electrode TDL in the direction Dx, and the straight line LY2 is a virtual straight line positioned at the other end of the one detection electrode TDL in the direction Dx. The straight line LY3 is arranged between the straight line LY1 and the straight line LY2. For example, the width WTDL from the straight line LY1 to the straight line LY2 is constant. As a result, the parasitic capacitances of the two detection electrodes TDL adjacent to each other with the dummy electrode TDD in between are substantially equal. There may be a plurality of straight lines LY3 between the straight lines LY1 and LY2. That is, in a region between the straight line LY1 and the straight line LY2, there may be a plurality of rows configured by the plurality of slits SL arranged on the same straight line.

(Embodiment 3)
Next, a detection device according to the third embodiment will be described. FIG. 16 is a plan view of the detection electrode according to the third embodiment. As shown in FIG. 16, in the third embodiment, the first conductive thin wire 33U includes a first main thin wire 331U and a first auxiliary thin wire 332U. The second conductive thin wire 33V includes a second main thin wire 331V and a second auxiliary thin wire 332V. In addition, the same components as those described in the first embodiment will be denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 16, the plurality of first main thin wires 331U are arranged in the first main strip-shaped area UAa having a predetermined width WU. A plurality of first main groups GU1 including two first main thin lines 331U displaced from each other at least in the direction Dv are formed. The plurality of first auxiliary fine wires 332U are arranged in the first auxiliary strip-shaped area UAb having a predetermined width WU. A plurality of first auxiliary groups GU2 including two first auxiliary thin wires 332U displaced from each other at least in the direction Dv are formed. The first main strip-shaped areas UAa and the first auxiliary strip-shaped areas UAb are alternately arranged at equal pitches in the direction Dv. The length between the adjacent first main strip-shaped area UAa and first auxiliary strip-shaped area UAb is the first reference length SW1.

As shown in FIG. 16, the plurality of second main thin wires 331V are arranged in the second main strip-shaped region VAa having the predetermined width WV. A plurality of second main groups GV1 including two second main thin lines 331V displaced from each other at least in the direction Du are formed. The plurality of second auxiliary fine wires 332V are arranged in the second auxiliary strip-shaped region VAb having the predetermined width WV. A plurality of second auxiliary groups GV2 including two second auxiliary thin wires 332V displaced from each other at least in the direction Du are formed. The second main strip-shaped areas VAa and the second auxiliary strip-shaped areas VAb are alternately arranged at equal pitches in the direction Du. The length between the adjacent second main strip-shaped region VAa and second auxiliary strip-shaped region VAb is the second reference length SW2.

The length of the first main thin wire 331U is not less than the difference between twice the second reference length SW2 and the predetermined width WV and not more than the sum of twice the second reference length SW2 and the predetermined width WV. Two electrical connection portions 33x are formed in one first main thin wire 331U. One second auxiliary thin wire 332V is in contact with one end of the first main thin wire 331U, and another second auxiliary thin wire 332V is in contact with the other end of the first main thin wire 331U. Further, two second main thin wires 331V are in contact with each other in the middle of the first main thin wires 331U. That is, the two second main thin wires 331V and the two second auxiliary thin wires 332V (four second conductive thin wires 33V) are in contact with one first main thin wire 331U.

The length of the first auxiliary thin wire 332U is not more than the predetermined width WV. Two electrical connection portions 33x are formed in one first auxiliary thin wire 332U. One second main thin wire 331V is in contact with one end of the first auxiliary thin wire 332U, and another second main thin wire 331V is in contact with the other end of the first auxiliary thin wire 332U. That is, the two second main thin wires 331V (two second conductive thin wires 33V) are in contact with one first auxiliary thin wire 332U.

The length of the second main thin wire 331V is not less than the difference between the first reference length SW1 and the predetermined width WU and not more than the sum of the first reference length SW1 and the predetermined width WU. Two electrical connecting portions 33x are formed in one second main thin wire 331V. One first main thin wire 331U is in contact with one end of the second main thin wire 331V, and one first auxiliary thin wire 332U is in contact with the other end of the second main thin wire 331V. That is, one first main thin wire 331 and one first auxiliary thin wire 332U (two first conductive thin wires 33U) are in contact with one second main thin wire 331V.

The length of the second auxiliary thin wire 332V is not more than the predetermined width WU. Two electrical connection portions 33x are formed in one second auxiliary thin wire 332V. One first main thin wire 331U is in contact with one end of the second auxiliary thin wire 332V, and another first main thin wire 331U is in contact with the other end of the second auxiliary thin wire 332V. That is, the two first main thin wires 331U (two first conductive thin wires 33U) are in contact with one second auxiliary thin wire 332V.

As shown in FIG. 16, in some of the intersection regions AX (intersection region AX1), two electrical connection portions 33x are generated. On the other hand, in the other intersection area AX (intersection area AX2), the electrical connection portion 33x does not occur.

In the third embodiment, the area of the polygon formed by the first conductive thin wire 33U and the second conductive thin wire 33V is less likely to vary than in the first embodiment. Therefore, the aperture ratio is likely to be uniform in the display area 10a.

(Embodiment 4)
Next, a detection device according to the fourth embodiment will be described. FIG. 17 is a plan view of the detection electrode according to the fourth embodiment. As shown in FIG. 17, in the fourth embodiment, the detection electrode TDL includes a first conductive thin wire 33U, a second conductive thin wire 33V, and a third conductive thin wire 33Y. In addition, the same components as those described in the first embodiment will be denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 17, the plurality of first conductive thin wires 33U are arranged in the first strip-shaped area UA having a predetermined width WU. A plurality of first groups GU including two first conductive thin wires 33U displaced from each other at least in the direction Dv are formed.

The plurality of second conductive thin wires 33V are arranged in the second strip area VA having a predetermined width WV. A plurality of second groups GV including two second conductive thin wires 33V that are displaced from each other at least in the direction Du are formed.

The plurality of third conductive thin wires 33Y are arranged in the third strip area YA having a predetermined width WY. A plurality of third groups GY including two third conductive thin wires 33Y displaced from each other at least in the direction Dx are formed.

The plurality of reference lines 33SY are virtual lines arranged in the direction Dx at equal pitches and extending in the direction Dy. The predetermined width WY is a width in which the third conductive thin line 33Y may be displaced from the reference line 33SY when the reference line 33SY is the center. The predetermined width WY is 1/20 or more and 1/5 or less of the third reference length SW3 when the length between the two reference lines 33SY adjacent in the direction Dx is the third reference length SW3. For example, the predetermined width WY is 10 μm or more and 30 μm or less.

One mesh shape of the detection electrode TDL is a hexagon. That is, a hexagon is formed by two first conductive thin wires 33U, two second conductive thin wires 33V, and two third conductive thin wires 33Y.

In the intersection area AXX where the first strip-shaped area UA, the second strip-shaped area VA, and the third strip-shaped area YA intersect, one first conductive thin wire 33U, one second conductive thin wire 33V, and one It is in contact with the third conductive thin wire 33Y. That is, the third conductive thin wire 33Y is in contact with the electrical connection portion 33xx, which is the intersection of the first conductive thin wire 33U and the second conductive thin wire 33V. The intersection area AXX is a hexagonal area. In some intersection regions AXX, one electrical connection portion 33xx is generated. On the other hand, the electrical connection portion 33xx does not occur in the other intersection regions AXX.

As described above, the detection electrode TDL includes, in addition to the first conductive thin wire 33U and the second conductive thin wire 33V, the third conductive thin wire extending in a direction different from the first conductive thin wire 33U and the second conductive thin wire 33V. 33Y may be provided.

(Embodiment 5)
FIG. 18 is a plan view of the detection electrode according to the fifth embodiment. It should be noted that the same components as those described in the above-described first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIG. 18, the first strip-shaped area UA includes a first right area UAa and a first left area UAb that are separated by a first reference line 33SU. In the fifth embodiment, the plurality of first conductive thin wires 33U are arranged in either the first right area UAa or the first left area UAb. The length γ, which is the amount of displacement of the first conductive thin wire 33U with respect to the first reference line 33SU, is a value randomly selected from values within a predetermined range that does not include 0. That is, the appearance frequency of the value selected as the length γ is uniform. For example, the length γ is selected from values in the range of 5 μm to 15 μm.

In one first strip-shaped area UA, the first conductive thin wires 33U arranged in the first right area UAa and the first conductive thin wires 33U arranged in the first left area UAb alternate along the direction Du. Are lined up. That is, in one first strip-shaped area UA, the first conductive thin wire 33U adjacent to the first conductive thin wire 33U arranged in the first right area UAa is arranged in the first left area UAb and the first left area UAb. The first conductive thin wire 33U adjacent to the first conductive thin wire 33U arranged in the UAb is arranged in the first right area UAa. For example, the direction in which the first conductive thin wire 33U deviates from the first reference line 33SU is determined by a random number. The random number is generated by a computer. When designing the first conductive thin wires 33U included in one first strip-shaped area UA, the computer controls the random numbers so that positive values and negative values alternately appear along the direction Du.

As shown in FIG. 18, the second strip area VA includes a second right area VAa and a second left area VAb that are separated by a second reference line 33SV. In the fifth embodiment, the plurality of second conductive thin wires 33V are arranged in either the second right area VAa or the second left area VAb. The length β, which is the amount of deviation of the second conductive thin wire 33V with respect to the second reference line 33SV, is a value randomly selected from values within a predetermined range that does not include zero. That is, the appearance frequency of the value selected as the length β is uniform. For example, the length β is selected from values in the range of 5 μm or more and 15 μm.

In one second strip-shaped area VA, the second conductive thin wire 33V arranged in the second right area VAa and the second conductive thin wire 33V arranged in the second left area VAb alternate along the direction Dv. Are lined up. That is, in one second strip-shaped area VA, the second conductive thin wire 33V adjacent to the second conductive thin wire 33V arranged in the second right area VAa is arranged in the second left area VAb and the second left area VAb. The first conductive thin wire 33V adjacent to the second conductive thin wire 33V arranged in VAb is arranged in the second right area VAa. For example, the direction in which the second conductive thin wire 33V deviates from the second reference line 33SV is determined by a random number. The random number is generated by a computer. When designing the second conductive thin wire 33V included in one second strip-shaped area VA, the computer controls the random numbers so that positive values and negative values alternately appear along the direction Dv.

With the above-described configuration, the first conductive thin wire 33U and the second conductive thin wire 33V do not cross each other as shown in FIG. For this reason, the difference between the aperture ratio in the peripheral region of the electrical connection portion 33x and the aperture ratio in the other regions is reduced, so that the visibility is improved.

(Embodiment 6)
FIG. 19 is a plan view of the detection electrode according to the sixth embodiment. As shown in FIG. 19, the detection electrode TDL according to the sixth embodiment has a plurality of detection blocks TDLB including a plurality of first conductive thin wires 33U and a plurality of second conductive thin wires 33V. For example, the plurality of detection blocks TDLB are arranged in a matrix on a plane parallel to the substrate 31. The plurality of detection blocks TDLB are respectively connected to the flexible printed board 71 (see FIG. 8) by the wiring 37. The detection device 30 according to the sixth embodiment performs the touch detection operation of the self-capacitance method instead of the mutual capacitance method.

Next, with reference to FIG. 20, the basic principle of touch detection of the self-capacitance method will be described. FIG. 20 is an explanatory diagram showing an example of an equivalent circuit for self-capacitive touch detection.

As shown in FIG. 20, the voltage detector DET is connected to the detection electrode E2. The voltage detector DET is a detection circuit including an imaginarily shorted operational amplifier. When the AC rectangular wave Sg having a predetermined frequency (for example, several kHz to several hundred kHz) is applied to the non-inverting input section (+), the AC rectangular wave Sg having the same potential is applied to the detection electrode E2.

When a conductor such as a finger is not in contact or in proximity (non-contact state), a current flows according to the capacitance Cx1 of the detection electrode E2. The voltage detector DET converts the fluctuation of the current according to the AC rectangular wave Sg into the fluctuation (waveform) of the voltage. In the state where a conductor such as a finger is in contact with or in proximity (contact state), the capacitance Cx2 generated by the finger in proximity to the detection electrode E2 is added to the capacitance Cx1 of the detection electrode E2, which is larger than the capacitance in the non-contact state. A current corresponding to the charged capacity (Cx1+Cx2) flows. The voltage detector DET converts the fluctuation of the current according to the AC rectangular wave Sg into the fluctuation (waveform) of the voltage. The amplitude of the waveform in the contact state is larger than the amplitude of the waveform in the non-contact state. As a result, the absolute value of the voltage difference between the waveform in the contact state and the waveform in the non-contact state changes in accordance with the influence of the conductor that is in contact with or approaching from the outside such as a finger. The switch SW is in an on (open) state when touch detection is performed, and is in an off (closed) state when touch detection is not performed, and resets the voltage detector DET.

In addition, it is understood that other actions and effects that are brought about by the aspects described in the above-described embodiments are apparent from the description of the present specification, or those that can be appropriately conceived by those skilled in the art, are brought about by the present invention. It

The present invention can be widely applied to the detection device and the display device according to the following aspects.

(1) substrate,
A plurality of first conductive thin wires provided on a plane parallel to the substrate and extending in a first direction;
A plurality of second conductive thin wires provided on the same layer as the first conductive thin wires and extending in a second direction forming an angle with the first direction;
A first group arranged in a first band-shaped region having a predetermined width and including at least two first conductive thin lines displaced from each other in the second direction;
A second group that is arranged in a second band-shaped region having a predetermined width and that includes at least two second conductive thin lines that are offset from each other in the first direction,
In the intersecting region of the first strip-shaped region and the second strip-shaped region, the first conductive thin line and the second conductive thin line are in contact with each other.
Detection device.

(2) The detection device according to (1), wherein in the intersecting region of the first strip-shaped region and the second strip-shaped region, there are two connecting portions where the first conductive thin line and the second conductive thin line are in contact with each other.

(3) The first conductive thin wire or the second conductive thin wire having a plurality of connecting portions in which the first conductive thin wire and the second conductive thin wire are in contact with each other, There is a slit. The detection device according to (1) or (2).

(4) The detection device according to any one of (1) to (3), wherein one mesh surrounded by the first conductive thin wire and the second conductive thin wire is a parallelogram.

(5) When a straight line bisecting the first strip-shaped region in the width direction is a first reference line and a straight line bisecting the second strip-shaped region in a width direction is a second reference line,
The length of the first conductive thin line is equal to or more than a difference between twice the length between the adjacent second reference lines and a predetermined width of the second strip-shaped region, and between the adjacent second reference lines. Is equal to or less than the sum of twice the length of the second strip-shaped region and a predetermined width of the second strip-shaped region,
The length of the second conductive thin line is not less than a difference between twice the length between the adjacent first reference lines and a predetermined width of the first strip-shaped region, and between the adjacent first reference lines. The detection device according to any one of (1) to (4), which is equal to or less than a sum of twice the length of the first strip-shaped region and a predetermined width of the first strip-shaped region.

(6) The first conductive thin line includes a first main thin line arranged in a first main strip-shaped region having a predetermined width and a first auxiliary thin line arranged in a first auxiliary strip-shaped region having a predetermined width,
The second conductive thin line includes a second main thin line arranged in a second main strip-shaped region having a predetermined width and a second auxiliary thin line arranged in a second auxiliary strip-shaped region having a predetermined width,
One said 1st main thin wire is in contact with 2 said 2nd main thin wires and 2 said 2nd auxiliary|assistant thin wires,
One said first auxiliary thin line is in contact with two said second main thin lines,
One said 2nd main thin wire touches one said 1st main thin wire and 1 said 1st auxiliary|assistant thin wire,
One said 2nd auxiliary|assistant thin wire is in contact with two said 1st main thin wires, The detection apparatus as described in (1).

(7) A plurality of third conductive thin wires provided on the same layer as the first conductive thin wires and extending in a third direction forming an angle with the first direction and the second direction,
A third group that is disposed in a third band-shaped region having a predetermined width and that includes at least two of the third conductive thin wires that are offset from each other in at least a direction orthogonal to the third direction,
In the intersecting region of the first strip-shaped region, the second strip-shaped region and the third strip-shaped region, the first conductive thin line, the second conductive thin line and the third conductive thin line are in contact with each other (1). The detection device described.

(8) The first strip-shaped region includes a first right region and a first left region that are separated by a first reference line that bisects the first strip-shaped region in the second direction,
In one of the first strip-shaped regions, the first conductive thin line arranged in the first right region and the first conductive thin line arranged in the first left region are arranged along the first direction. Alternated,
The second strip-shaped region includes a second right region and a second left region that are separated by a second reference line that bisects the second strip-shaped region in the first direction.
In one of the second strip-shaped regions, the second conductive thin line arranged in the second right region and the second conductive thin line arranged in the second left region are arranged along the second direction. The detection device according to (1), which is arranged alternately.

(9) The detection device according to any one of (1) to (8), and a display area,
A display device, wherein the first conductive thin line and the second conductive thin line are provided in a region overlapping with the display region.

1 Display Device with Touch Detection Function 2 Pixel Substrate 3 Counter Substrate 6 Liquid Crystal Layer 10 Display Unit with Touch Detection Function 10a Display Area 10b Frame Region 11 Control Unit 12 Gate Driver 13 Source Driver 14 Drive Electrode Driver 20 Display Device 21 TFT Substrate 22 Pixel Electrode 30 Detection device 31 Substrate 32 Color filter 33a Conductive thin wire 33U First conductive thin wire 33V Second conductive thin wire 33Y Third conductive thin wire 33x, 33xx Electrical connection portion 331U First main thin wire 331V Second main thin wire 332U first 1 Auxiliary fine wire 332V Second auxiliary fine wire 37 Wiring 38 Protective layer 40 Touch detection unit (detection unit)
42 detection signal amplification section 43 A/D conversion section 44 signal processing section 45 coordinate extraction section 46 detection timing control section AX, AXX crossing area COML drive electrode GCL scanning signal line Pix pixel SGL pixel signal line SPix subpixel SL slit TDL detection electrode TDLB detection block Tr TFT element UA first belt-shaped area UAa first main belt-shaped area UAb first auxiliary belt-shaped area VA second belt-shaped area VAa first main belt-shaped area VAb first auxiliary belt-shaped area Vcom drive signal Vdet detection signal Vdisp video signal Vpix Pixel signal Vscan Scan signal YA Third band area

Claims (13)

Board,
A plurality of first conductive thin wires provided on a plane parallel to the substrate and extending in a first direction;
A plurality of second conductive thin wires provided on the same layer as the first conductive thin wires and extending in a second direction forming an angle with the first direction;
A first group arranged in a first band-shaped region having a predetermined width and including at least two first conductive thin lines displaced from each other in the second direction;
A second group that is arranged in a second band-shaped region having a predetermined width and that includes at least two second conductive thin lines that are offset from each other in the first direction,
Wherein in the crossing region of the first strip-shaped region and the second strip-shaped region, the second conductive thin wire and the first electroconductive thin line is tangent,
The first strip-shaped region includes a first main strip-shaped region having a predetermined width and a first auxiliary strip-shaped region having a predetermined width,
The second strip-shaped region includes a second main strip-shaped region having a predetermined width and a second auxiliary strip-shaped region having a predetermined width,
The first conductive thin line includes a first main thin line arranged in the first main strip-shaped region and a first auxiliary thin line arranged in the first auxiliary strip-shaped region,
The second conductive thin wire includes a second main thin wire arranged in the second main strip-shaped area and a second auxiliary thin wire arranged in the second auxiliary strip-shaped area,
One said 1st main thin wire is in contact with 2 said 2nd main thin wires and 2 said 2nd auxiliary|assistant thin wires,
One said first auxiliary thin line is in contact with two said second main thin lines,
One said 2nd main thin wire touches one said 1st main thin wire and 1 said 1st auxiliary|assistant thin wire,
A detection device in which one of the second auxiliary thin wires is in contact with two of the first main thin wires . The detection device according to claim 1, wherein in the intersecting region of the first strip-shaped region and the second strip-shaped region, there are two connecting portions where the first conductive thin line and the second conductive thin line are in contact with each other. The first conductive thin wire and the second conductive thin wire have a plurality of connecting portions in contact with each other, and the first conductive thin wire or the second conductive thin wire between the two connecting portions has a slit. The detection device according to claim 1. When a straight line bisecting the first strip-shaped region in the width direction is a first reference line and a straight line bisecting the second strip-shaped region in a width direction is a second reference line,
The length of the first main thin line is not less than a difference between twice the length between the adjacent second reference lines and a predetermined width of the second main strip-shaped region, and between the adjacent second reference lines. Is less than or equal to the sum of twice the length of the second main strip-shaped region and a predetermined width of the second main strip-shaped region,
The length of the second main thin line is equal to or more than a difference between twice the length between the adjacent first reference lines and a predetermined width of the first main strip-shaped region, and between the adjacent first reference lines. 2. The detection device according to claim 1, which is less than or equal to twice the length of the first main strip-shaped region and a predetermined width of the first main strip-shaped region. The first strip-shaped region includes a first right region and a first left region that are separated by a first reference line that bisects the first strip-shaped region in the second direction.
In one of the first strip-shaped regions, the first conductive thin line arranged in the first right region and the first conductive thin line arranged in the first left region are arranged along the first direction. Alternated,
The second strip-shaped region includes a second right region and a second left region that are separated by a second reference line that bisects the second strip-shaped region in the first direction.
In one of the second strip-shaped regions, the second conductive thin line arranged in the second right region and the second conductive thin line arranged in the second left region are arranged along the second direction. The detection device according to claim 1, which is arranged alternately. A detection device according to any one of claims 1 to 5 , and a display area,
A display device, wherein the first conductive thin line and the second conductive thin line are provided in a region overlapping with the display region. Board,
A plurality of first conductive thin wires provided on a plane parallel to the substrate and extending in a first direction;
A plurality of second conductive thin wires provided on the same layer as the first conductive thin wires and extending in a second direction forming an angle with the first direction;
A first group arranged in a first band-shaped region having a predetermined width and including at least two first conductive thin lines displaced from each other in the second direction;
A second group that is arranged in a second band-shaped region having a predetermined width and that includes at least two second conductive thin lines that are offset from each other in the first direction,
In the intersecting region of the first strip-shaped region and the second strip-shaped region, the first conductive thin line and the second conductive thin line are in contact with each other,
When a straight line bisecting the first strip-shaped region in the width direction is a first reference line and a straight line bisecting the second strip-shaped region in a width direction is a second reference line,
The length of the first conductive thin line is equal to or more than a difference between twice the length between the adjacent second reference lines and a predetermined width of the second strip-shaped region, and between the adjacent second reference lines. Is equal to or less than the sum of twice the length of the second strip-shaped region and a predetermined width of the second strip-shaped region,
The length of the second conductive thin line is not less than a difference between twice the length between the adjacent first reference lines and a predetermined width of the first strip-shaped region, and between the adjacent first reference lines. Is equal to or less than the sum of twice the length and the predetermined width of the first strip-shaped region.
Detection device. The detection device according to claim 7, wherein in the intersecting region of the first strip-shaped region and the second strip-shaped region, there are two connecting portions where the first conductive thin line and the second conductive thin line are in contact with each other. The first conductive thin wire and the second conductive thin wire have a plurality of connecting portions, and the first conductive thin wire or the second conductive thin wire between the two connecting portions has a slit. The detection device according to claim 7. The detection device according to claim 7, wherein one mesh surrounded by the first conductive thin wire and the second conductive thin wire is a parallelogram. A plurality of third conductive thin wires provided on the same layer as the first conductive thin wires and extending in a third direction forming an angle with the first direction and the second direction;
A third group that is disposed in a third band-shaped region having a predetermined width, and that includes at least two third conductive thin wires that are offset from each other in at least a direction orthogonal to the third direction,
The first conductive thin line, the second conductive thin line, and the third conductive thin line are in contact with each other in an intersecting region of the first strip-shaped region, the second strip-shaped region, and the third strip-shaped region.
The detection device according to claim 7. The first strip-shaped region includes a first right region and a first left region that are separated by a first reference line that bisects the first strip-shaped region in the second direction.
In one said 1st strip|belt-shaped area|region, the said 1st electroconductive thin wire arrange|positioned in the said 1st right area|region and the said 1st electroconductive thin wire arrange|positioned in the said 1st left area|region are along the said 1st direction. Alternated,
The second strip-shaped region includes a second right region and a second left region that are separated by a second reference line that bisects the second strip-shaped region in the first direction.
In the one second strip-shaped region, the second conductive thin line arranged in the second right region and the second conductive thin line arranged in the second left region are along the second direction. Staggered
The detection device according to claim 7. A detection device according to any one of claims 7 to 12, and a display region,
A display device, wherein the first conductive thin line and the second conductive thin line are provided in a region overlapping with the display region.