Display device with touch detection function

Abstract

The present invention provides a display device with a touch detection function, and a display device having a touch detection device, that can perform touch detection while suppressing resistance and pattern visibility even when using touch detection electrodes made of metal. In the display device with a touch detection function, the plurality of touch detection electrodes (TDL) are metal wirings that face drive electrodes in a direction perpendicular to the substrate surface and extend in a direction different from that in which signal lines extend. The metal wirings are arranged at a predetermined pitch and are capacitively coupled to the drive electrodes.

Description

[0001] This application is a divisional application of a patent application filed on November 25, 2013, with application number 201310601109.6 and invention name “Display device and electronic device with touch detection function”, all contents of which are incorporated herein by reference. Technical Field

[0002] The present invention relates to a display device capable of detecting an external approaching object, and in particular to a display device with a touch detection function capable of detecting an external approaching object based on a change in electrostatic capacitance, and a display device having a touch detection device. Background Art

[0003] In recent years, touch detection devices capable of detecting external approaching objects, known as so-called touch panels, have attracted much attention. Touch panels are mounted on display devices such as liquid crystal display devices or integrated with display devices such as liquid crystal display devices, and are thus used in display devices with touch detection functions. In addition, display devices with touch detection functions can display various button images on the display device, thereby allowing the touch panel to replace conventional mechanical buttons and input information. Since display devices with touch detection functions having such touch panels do not require input devices such as keyboards, mice, and auxiliary keyboards, their use in portable information devices such as mobile phones, in addition to computers, is also tending to expand.

[0004] There are several touch detection methods, including optical, resistive, and capacitive. Using a capacitive touch detection device in a portable information terminal or similar device can create a device with a relatively simple structure and low power consumption. For example, Patent Document 1 describes a touch panel that incorporates a transparent electrode pattern to prevent visibility.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2010-197576 Summary of the Invention

[0008] Problems to be solved by the invention

[0009] However, in display devices with touch detection functions, the need for thinner, larger screens, or higher resolution demands lower resistance in touch detection electrodes. Touch detection electrodes are made of transparent conductive oxides such as ITO (Indium Tin Oxide). While metal materials are effective for achieving lower resistance in touch detection electrodes, their light-blocking properties compared to transparent conductive oxides such as ITO can reduce transmittance and expose the touch detection electrode pattern.

[0010] The present invention is a technology developed in view of the above-mentioned problems, and its purpose is to provide a display device with a touch detection function and a display device with a touch detection device that can perform touch detection while suppressing resistance and pattern visibility even when using touch detection electrodes made of metal materials.

[0011] The display device with a touch detection function of the present invention comprises: a substrate; a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate; a plurality of signal lines extending on a plane parallel to the surface of the substrate, supplying pixel signals for displaying images to the pixel electrodes; a display function layer performing an image display function based on the pixel signals; a driving electrode opposite to the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction parallel to the direction in which the signal lines extend; and a plurality of touch detection electrodes, the touch detection electrodes being metal wiring opposite to the driving electrodes in the perpendicular direction and extending in a direction different from the direction in which the signal lines extend, the metal wiring being arranged at a prescribed pitch and capacitively coupled to the driving electrodes.

[0012] A display device with a touch detection function according to the present invention comprises: a substrate; a plurality of pixel electrodes arranged in an array on a surface parallel to a surface of the substrate; a plurality of signal lines extending in a plane parallel to the surface of the substrate and supplying pixel signals to the pixel electrodes; a display function layer performing an image display function based on the pixel signals; a drive electrode opposing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction different from the direction in which the signal lines extend; a plurality of touch detection electrodes, the touch detection electrodes being metal wirings opposing the drive electrodes in the perpendicular direction, the metal wirings being arranged at a predetermined pitch and capacitively coupled to the drive electrodes; and a color filter opposing the display function layer in the perpendicular direction, the color filter having a plurality of color regions including at least one of a red color region, a green color region, and a blue color region, wherein the plurality of touch detection electrodes extend in the direction in which the signal lines extend and three-dimensionally intersect with the color regions of the color filter.

[0013] A display device with a touch detection function according to the present invention comprises: a substrate; a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate; a plurality of signal lines extending on a plane parallel to the surface of the substrate and supplying pixel signals to the pixel electrodes; a display function layer performing an image display function based on the pixel signals; a drive electrode opposing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction different from the direction in which the signal lines extend; a plurality of touch detection electrodes opposing the drive electrodes in the perpendicular direction and arranged at a predetermined pitch and capacitively coupled to the drive electrodes; and a color filter opposing the display function layer in the perpendicular direction, the color filter having a plurality of color regions including at least one of a color region colored red, a color region colored green, and a color region colored blue, wherein the plurality of touch detection electrodes include a transparent electrode extending along a specific color region of the color filter and a metal electrode disconnected in the extending direction and laminated on the transparent electrode.

[0014] The electronic device of the present invention includes the above-mentioned display device with a touch detection function, and corresponds to, for example, a television device, a digital camera, a personal computer, a video camera, or a portable terminal device such as a mobile phone.

[0015] In the display device and electronic device with a touch detection function of the present invention, although metal touch detection electrodes are used, a decrease in transmittance caused by the metal touch detection electrodes or visual recognition of the touch detection electrode pattern can be suppressed.

[0016] (Effects of the Invention)

[0017] According to the display device with a touch detection function and the electronic device of the present invention, the touch detection electrode can achieve low resistance, and the display device with a touch detection function can achieve thinning, a larger screen, or high definition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a block diagram illustrating a configuration example of a display device with a touch detection function according to the first embodiment.

[0019] Figure 2 This is an explanatory diagram showing a state where a finger is not in contact with or close to the device in order to explain the basic principle of the electrostatic capacitance type touch detection method.

[0020] Figure 3 It shows Figure 2 1 is an explanatory diagram of an example of an equivalent circuit in a state where a finger is not in contact with or close to the device.

[0021] Figure 4 This is an explanatory diagram showing a state where a finger is in contact with or close to the device in order to explain the basic principle of the electrostatic capacitance touch detection method.

[0022] Figure 5 It shows Figure 4 1 is an explanatory diagram of an example of an equivalent circuit when a finger is in contact with or close to the device.

[0023] Figure 6 3 is a diagram showing an example of the waveforms of the drive signal and the touch detection signal.

[0024] Figure 7 FIG. 1 is a diagram showing an example of a module in which a display device with a touch detection function is mounted.

[0025] Figure 8 FIG. 1 is a diagram showing an example of a module in which a display device with a touch detection function is mounted.

[0026] Figure 9 This is a cross-sectional view schematically showing a cross-sectional structure of a display unit with a touch detection function according to the first embodiment.

[0027] Figure 10 This is a circuit diagram showing a pixel arrangement of a display unit with a touch detection function according to the first embodiment.

[0028] Figure 11 This is a perspective view showing a configuration example of drive electrodes and touch detection electrodes in the display unit with a touch detection function according to the first embodiment.

[0029] Figure 12 This is a timing waveform chart showing an operation example of the display device with a touch detection function according to the first embodiment.

[0030] Figure 13 Schematic diagram showing the arrangement of touch detection electrodes according to the first embodiment.

[0031] Figure 14 Schematic diagram showing the arrangement of touch detection electrodes in a comparative example.

[0032] Figure 15 Schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter in a comparative example.

[0033] Figure 16 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the first embodiment.

[0034] Figure 17This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the first modification of the first embodiment.

[0035] Figure 18 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the second modification of the first embodiment.

[0036] Figure 19 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the third modification of the first embodiment.

[0037] Figure 20 This is a cross-sectional view schematically illustrating a cross-sectional structure of a display unit with a touch detection function according to a fourth modification of the first embodiment.

[0038] Figure 21 This is a cross-sectional view schematically illustrating a cross-sectional structure of a display unit with a touch detection function according to a fifth modification of the first embodiment.

[0039] Figure 22 This is a cross-sectional view schematically illustrating a cross-sectional structure of a display unit with a touch detection function according to a sixth modification of the first embodiment.

[0040] Figure 23 This is a cross-sectional view schematically illustrating a cross-sectional structure of a display unit with a touch detection function according to a seventh modification of the first embodiment.

[0041] Figure 24 This is a cross-sectional view schematically showing a cross-sectional structure of a display unit with a touch detection function according to the second embodiment.

[0042] Figure 25 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the second embodiment.

[0043] Figure 26 This is a cross-sectional view schematically showing a cross-sectional structure of a display unit with a touch detection function according to a modification of the second embodiment.

[0044] Figure 27 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the third embodiment.

[0045] Figure 28 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to a modification of the third embodiment.

[0046] Figure 29 It is a cross-sectional view schematically showing a cross-sectional structure of a touch detection electrode according to the fourth embodiment.

[0047] Figure 30 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the fourth embodiment.

[0048] Figure 31 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the first modification of the fourth embodiment.

[0049] Figure 32 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the second modification of the fourth embodiment.

[0050] Figure 33 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0051] Figure 34 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0052] Figure 35 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0053] Figure 36 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0054] Figure 37 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0055] Figure 38 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0056] Figure 39 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0057] Figure 40 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0058] Figure 41 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0059] Figure 42This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0060] Figure 43 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied.

[0061] Figure 44 This is a diagram illustrating an example of an electronic device to which the display device with a touch detection function according to this embodiment is applied. DETAILED DESCRIPTION

[0062] The embodiments of the present invention will be described in detail with reference to the accompanying drawings. The contents described in the following embodiments are not intended to limit the present invention. In addition, the constituent elements described below include contents that can be easily thought of by those skilled in the art, and substantially the same contents. Moreover, the constituent elements described below can be appropriately combined. In addition, the description is carried out in the following order.

[0063] 1. Implementation (Display Device with Touch Detection Function)

[0064] 1-1. Implementation Method 1

[0065] 1-2. Implementation Method 2

[0066] 1-3. Implementation Method 3

[0067] 1-4. Implementation Method 4

[0068] 1-5. Other embodiments and modifications

[0069] 2. Application Examples (Electronic Equipment)

[0070] The display device with a touch detection function according to the above-described embodiment is applied to an example of an electronic device.

[0071] 3. Forms of the present invention

[0072] (1. Implementation Method)

[0073] (1-1. Implementation Method 1)

[0074] (Configuration Example)

[0075] (Overall structure example)

[0076] Figure 1This is a block diagram illustrating an example configuration of a display device with a touch detection function according to Embodiment 1. The display device 1 with a touch detection function includes a display unit 10 with a touch detection function, a control unit 11, a gate driver 12, a source driver 13, a drive electrode driver 14, and a touch detection unit 40. The display device 1 with a touch detection function is a display device in which the touch detection function is built into the display unit 10 with a touch detection function. The display unit 10 with a touch detection function is a so-called in-cell type device in which a liquid crystal display unit 20 using a liquid crystal display element as a display element and an electrostatic capacitance type touch detection component 30 are integrated. Alternatively, the display unit 10 with a touch detection function may be a so-called on-cell type device in which an electrostatic capacitance type touch detection component 30 is mounted on a liquid crystal display unit 20 using a liquid crystal display element as a display element.

[0077] As described later, the liquid crystal display unit 20 sequentially scans and displays images one horizontal line at a time in accordance with a scanning signal Vscan supplied from the gate driver 12. The control unit 11 is a circuit that supplies control signals to the gate driver 12, source driver 13, drive electrode driver 14, and touch detection unit 40 based on an externally supplied video signal Vdisp, thereby controlling their synchronous operation.

[0078] The gate driver 12 has a function of sequentially selecting one horizontal line to be driven for display in the display unit with a touch detection function 10 based on a control signal supplied from the control unit 11 .

[0079] The source driver 13 is a circuit that supplies a pixel signal Vpix to each pixel Pix (described later) of the display unit with a touch detection function 10 based on a control signal supplied from the control unit 11 .

[0080] The drive electrode driver 14 is a circuit that supplies a drive signal Vcom to drive electrodes COML (described later) of the display unit with a touch detection function 10 based on a control signal supplied from the control unit 11 .

[0081] (Basic Principle of Electrostatic Capacitive Touch Detection)

[0082] The touch detection unit 30 operates based on the basic principle of electrostatic capacitance type touch detection and outputs a touch detection signal Vdet. Figures 1 to 6 , the basic principle of touch detection in the display device with a touch detection function of this embodiment is described. Figure 2 This is an explanatory diagram showing a state where a finger is not in contact with or close to the device in order to explain the basic principle of the electrostatic capacitance type touch detection method. Figure 3 It shows Figure 21 is an explanatory diagram of an example of an equivalent circuit in a state where a finger is not in contact with or close to the device. Figure 4 This is an explanatory diagram showing a state where a finger is in contact with or close to the device in order to explain the basic principle of the electrostatic capacitance touch detection method. Figure 5 It shows Figure 4 1 is an explanatory diagram of an example of an equivalent circuit when a finger is in contact with or close to the device.

[0083] For example, Figure 2 as well as Figure 4 As shown in FIG, the capacitive element C1 includes a pair of electrodes disposed opposite to each other via a dielectric D, a driving electrode E1, and a touch detection electrode E2. Figure 3 as well as Figure 5 As shown, one end of the capacitive element C1 is connected to an AC signal source (driving signal source) S, and the other end P is grounded via a resistor R and connected to a voltage detector (touch detection unit) DET.

[0084] When an AC rectangular wave Sg of a predetermined frequency (e.g., several kHz to several hundred kHz) is applied from an AC signal source S to the drive electrode E1 (one end of the capacitive element C1), an output waveform (touch detection signal Vdet) appears at the touch detection electrode E2 (the other end P of the capacitive element C1). This AC rectangular wave Sg corresponds to the touch drive signal Vcomt, described later.

[0085] When the finger is not in contact (or close to) Figure 2 as well as Figure 3 As shown, a current I0 corresponding to the capacitance value of the capacitor element C1 flows as the capacitor element C1 is charged and discharged. At this time, the potential waveform of the other end P of the capacitor element C1 becomes, for example, Figure 6 As shown in the waveform V0, Figure 3 The voltage detector DET shown detects the waveform V0.

[0086] On the other hand, when the finger is in contact (or close to) Figure 4 As shown in FIG, the electrostatic capacitance formed by the finger acts as a capacitance element C2 applied to the capacitance element C1. Figure 5 From the equivalent circuit shown in FIG. 1 , the capacitor element C2 is connected in series with the capacitor element C1. In this state, as the capacitor elements C1 and C2 are charged and discharged, currents I1 and I2 flow through the capacitor elements C1 and C2. At this time, the potential waveform of the other end P of the capacitor element C1 becomes, for example, Figure 6The voltage detector DET detects waveform V1, similar to waveform V1 in FIG1 . At this point, the potential at the other end P is a divided potential determined by the values ​​of currents I1 and I2 flowing through capacitors C1 and C2. Therefore, waveform V1 is smaller than waveform V0 in the non-contact state. Voltage detector DET compares the detected voltage with a predetermined threshold voltage Vth. If the voltage is above the threshold voltage, it determines a non-contact state. On the other hand, if the voltage is below the threshold voltage Vth, it determines a contact state. This enables touch detection.

[0087] Figure 1 The touch detection unit 30 shown performs touch detection by sequentially scanning one detection block at a time according to a drive signal Vcom (a touch drive signal Vcomt described later) supplied from the drive electrode driver 14 .

[0088] The touch detection element 30 outputs a touch detection signal Vdet from a plurality of touch detection electrodes TDL (described later) to each detection block, and supplies the signal to the touch detection unit 40 .

[0089] The touch detection unit 40 is a circuit that detects the presence of a touch on the touch detection component 30 (the aforementioned contact state) based on a control signal supplied by the control unit 11 and a touch detection signal Vdet supplied by the touch detection component 30 of the display unit 10 with a touch detection function. If a touch is present, the circuit determines the coordinates of the touch within the touch detection area. The touch detection unit 40 includes an analog low-pass filter (LPF) unit 42, an A / D converter 43, a signal processor 44, a coordinate extractor 45, and a detection timing controller 46.

[0090] The analog LPF unit 42 is a low-pass analog filter that receives the touch detection signal Vdet supplied by the touch detection component 30, removes high-frequency components (noise components) contained in the touch detection signal Vdet, extracts the touch components, and outputs them separately. A resistor R is connected between each input terminal of the analog LPF unit 42 and ground to apply a DC potential (0 V). Alternatively, a switch can be provided in place of the resistor R, and the DC potential (0 V) can be applied by turning the switch on for a predetermined period of time.

[0091] The A / D converter 43 is a circuit that samples the analog signals output from the analog LPF 42 at a timing synchronized with the drive signal Vcom and converts the samples into digital signals.

[0092] The signal processing unit 44 includes a digital filter that removes frequency components (noise components) higher than the frequency of the sampled touch drive signal Vcomt contained in the output signal of the A / D converter 43, thereby extracting the touch component. The signal processing unit 44 is a logic circuit that detects the presence or absence of a touch on the touch detection element 30 based on the output signal of the A / D converter 43.

[0093] The coordinate extraction unit 45 is a logic circuit that obtains the touch panel coordinates when a touch is detected in 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 synchronously.

[0094] (Module)

[0095] Figure 7 as well as Figure 8 FIG. 1 is a diagram showing an example of a module in which a display device with a touch detection function is mounted. Figure 7 As shown, the display device with a touch detection function 1 may also be mounted in a module by forming the aforementioned driving electrode driver 14 on the TFT substrate 21 of the glass substrate.

[0096] like Figure 7 As shown, the display device 1 with a touch detection function has a display unit 10 with a touch detection function, a driving electrode driver 14, and a COG (Chip On Glass: chip on glass substrate) 19A. The display unit 10 with a touch detection function is a so-called landscape (horizontal display) type (horizontally long) component. For the display unit 10 with a touch detection function, the driving electrode COML and the touch detection electrode TDL formed in a three-dimensional intersection with the driving electrode COML are schematically shown in a direction perpendicular to the surface of the TFT substrate described later. That is, the driving electrode COML is formed in the short side direction of the display unit 10 with a touch detection function, and the touch detection electrode TDL is formed in the long side direction of the display unit 10 with a touch detection function. The output of the touch detection electrode TDL is provided on the short side of the display unit 10 with a touch detection function, and is connected to the touch detection unit 40 installed on the outside of the module through the terminal portion T composed of a flexible substrate or the like. The driving electrode driver 14 is formed on the TFT substrate 21 which is a glass substrate. COG19A is a chip mounted on the TFT substrate 21, and has a built-in Figure 4 The control unit 11, gate driver 12, source driver 13 and other circuits required for display operation are shown. Figure 8 As shown, the display device with a touch detection function 1 can include a driving electrode driver 14 built into COG (Chip On Glass).

[0097] like Figure 8As shown, the display device with a touch detection function 1 includes a COG 19B in the module. Figure 8 The COG19B shown has a built-in drive electrode driver 14 in addition to the various circuits required for the display operation described above. As will be described later, the display device 1 with a touch detection function performs line-by-line scanning, one horizontal line at a time, during a display operation. That is, the display device 1 with a touch detection function performs display scanning in parallel with the short side direction of the display unit 10 with a touch detection function. On the other hand, during a touch detection operation, the display device 1 with a touch detection function sequentially scans one detection line at a time, by sequentially applying a drive signal Vcom to the drive electrodes COML. That is, the display device 1 with a touch detection function performs touch detection scanning in parallel with the long side direction of the display unit 10 with a touch detection function.

[0098] so, Figure 7 as well as Figure 8 The display device 1 with a touch detection function shown in FIG. 1 outputs a touch detection signal Vdet from the short side of the display unit 10 with a touch detection function. This reduces the number of touch detection electrodes TDL in the display device 1 with a touch detection function, and also simplifies the layout of wiring for connecting to the touch detection unit 40 via the terminal portion T. Figure 8 The display device with a touch detection function 1 shown has the drive electrode driver 14 built into the COG 19B, and thus the frame can be narrowed.

[0099] (Display unit 10 with touch detection function)

[0100] Next, a configuration example of the display unit with a touch detection function 10 will be described in detail.

[0101] Figure 9 This is a cross-sectional view schematically showing a cross-sectional structure of a display unit with a touch detection function according to the first embodiment. Figure 10 This is a circuit diagram illustrating the pixel arrangement of a display unit with a touch detection function according to Embodiment 1. The display unit with a touch detection function 10 includes a pixel substrate 2, an opposing substrate 3 disposed perpendicularly to the surface of the pixel substrate 2 and facing the pixel substrate, and a liquid crystal layer 6 interposed between the pixel substrate 2 and the opposing substrate 3.

[0102] The pixel substrate 2 includes a TFT substrate 21 as a circuit substrate and a plurality of pixel electrodes 22 arranged in a matrix on the TFT substrate 21. Figure 10As shown, the TFT substrate 21 includes thin film transistor (TFT) elements Tr for each pixel Pix, pixel signal lines SGL that supply pixel signals Vpix to each pixel electrode 22, and scanning signal lines GCL that drive each TFT element Tr. The pixel signal lines SGL extend in a plane parallel to the surface of the TFT substrate and supply pixel signals for displaying images to the pixels. Figure 10 The illustrated liquid crystal display unit 20 includes a plurality of pixels Pix arranged in a matrix. Each pixel Pix includes a TFT element Tr and a liquid crystal element LC. The TFT element Tr is composed of a thin-film transistor, in this example, an n-channel MOS (Metal Oxide Semiconductor) TFT. The source 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 drain is connected to one end of the liquid crystal element LC. One end of the liquid crystal element LC is connected to the drain of the TFT element Tr, and the other end is connected to the drive electrode COML.

[0103] The pixel Pix is ​​connected to other pixels Pix belonging to the same row of the liquid crystal display unit 20 through the scanning signal line GCL. The scanning signal line GCL is connected to the gate driver 12, and is supplied with the scanning signal Vscan from the gate driver 12. In addition, the pixel Pix is ​​connected to other pixels Pix belonging to the same column of the liquid crystal display unit 20 through the pixel signal line SGL. The pixel signal line SGL is connected to the source driver 13, and is supplied with the pixel signal Vpix from the source driver 13. Moreover, the pixel Pix is ​​connected to other pixels Pix belonging to the same column of the liquid crystal display unit 20 through the driving electrode COML. The driving electrode COML is connected to the driving electrode driver 14, and is supplied with the driving signal Vcom from the driving electrode driver 14. That is, in this example, a plurality of pixels Pix belonging to the same column share one driving electrode COML.

[0104] Figure 1 The gate driver 12 shown is Figure 10 The scanning signal line GCL shown applies a scanning signal Vscan to the gate of the TFT element Tr of the pixel Pix, thereby sequentially selecting one row (one horizontal line) of the pixels Pix formed in a matrix in the liquid crystal display unit 20 as a target for display driving. Figure 1 The source driver 13 shown is Figure 10 The pixel signal line SGL shown supplies pixel signals Vpix to the pixels Pix constituting one horizontal line sequentially selected by the gate driver 12. Then, in these pixels Pix, display for one horizontal line is performed based on the supplied pixel signals Vpix. Figure 1The driving electrode driver 14 shown applies a driving signal Vcom, according to Figure 9 as well as Figure 10 Each block shown, which is composed of a predetermined number of drive electrodes COML, drives the drive electrodes COML.

[0105] As described above, the liquid crystal display unit 20 is driven by causing the gate driver 12 to sequentially scan the scanning signal lines GCL in a time-division manner, thereby sequentially selecting one horizontal line. Furthermore, the liquid crystal display unit 20 supplies pixel signals Vpix to pixels Pix belonging to one horizontal line via the source driver 13, thereby displaying one horizontal line at a time. During this display operation, the drive electrode driver 14 applies the drive signal Vcom to the block containing the drive electrode COML corresponding to that horizontal line.

[0106] The counter substrate 3 includes a glass substrate 31, a color filter 32 formed on one side of the glass substrate 31, and a plurality of drive electrodes COML formed on the surface of the color filter 32 on the opposite side of the glass substrate 31. Touch detection electrodes TDL, which serve as detection electrodes for the touch detection component 30, are formed on the other side of the glass substrate 31, and a polarizing plate 35 is provided on top of the touch detection electrodes TDL.

[0107] The color filter 32 is periodically arranged with color filters colored in, for example, red (R), green (G), and blue (B). The three colors R, G, and B are combined as a group with the above-mentioned Figure 10 The color filter 32 is opposite to the liquid crystal layer 6 in a direction perpendicular to the TFT substrate. In addition, the color filter 32 may be colored in different colors or a combination of other colors.

[0108] The driving electrode COML involved in this embodiment not only functions as a common driving electrode of the liquid crystal display unit 20, but also functions as a driving electrode of the touch detection component 30. In this embodiment, one driving electrode COML is configured to correspond to one pixel electrode 22 (forming a column of pixel electrodes 22). The driving electrode COML involved in the first embodiment is opposite to the pixel electrode 22 in a direction perpendicular to the surface of the TFT substrate 21, and extends in a direction parallel to the direction in which the above-mentioned pixel signal line SGL extends. The driving electrode COML applies an AC rectangular waveform driving signal Vcom from the driving electrode driver 14 to the driving electrode COML through a conductive contact conductive column not shown in the figure.

[0109] The liquid crystal layer 6 modulates light passing therethrough according to the state of the electric field, and uses liquid crystals in various modes such as TN (Twisted Nematic) mode, VA (Virtical Alignment) mode, and ECB (Electrically Controlled Birefringence) mode.

[0110] Furthermore, alignment films may be provided between the liquid crystal layer 6 and the pixel substrate 2 and between the liquid crystal layer 6 and the counter substrate 3 . Furthermore, an incident-side polarizing plate may be provided on the lower surface of the pixel substrate 2 .

[0111] Figure 11 This is a three-dimensional diagram showing an example of the structure of the driving electrodes and touch detection electrodes of the display unit with touch detection function involved in the first embodiment. The touch detection component 30 is composed of the driving electrodes COML and the touch detection electrodes TDL provided on the opposing substrate 3. The driving electrode COML is composed of a plurality of stripe-shaped electrode patterns extending in the left-right direction of the figure. When performing a touch detection operation, the driving electrode driver 14 sequentially supplies a driving signal Vcom to each electrode pattern, and performs line-by-line scanning drive in a time-division manner as described later. The touch detection electrode TDL is composed of a stripe-shaped electrode pattern extending in a direction intersecting with the extension direction of the electrode pattern of the driving electrode COML. In addition, the touch detection electrode TDL is opposite to the driving electrode COML in a direction perpendicular to the surface of the TFT substrate 21. Each electrode pattern of the touch detection electrode TDL is connected to the input of the analog LPF unit 42 of the touch detection unit 40. The electrode patterns of the driving electrode COML and the touch detection electrode TDL intersect with each other so that electrostatic capacitance is generated at their intersection.

[0112] With this structure, in the touch detection component 30, when performing a touch detection action, the driving electrode driver 14 is driven so that the driving electrode COML is used as a driving electrode block to perform line-by-line scanning in a time-division manner, thereby selecting one detection block of the driving electrode COML in turn, and outputting a touch detection signal Vdet from the touch detection electrode TDL, thereby performing touch detection of one detection block. In other words, the driving electrode block corresponds to the driving electrode E1 in the basic principle of touch detection described above, and the touch detection electrode TDL corresponds to the touch detection electrode E2, and the touch detection component 30 detects touch according to this basic principle. Figure 11 As shown, the intersecting electrode patterns form a matrix of electrostatic capacitive touch sensors. Therefore, by scanning the entire touch detection surface of the touch detection component 30, it is possible to detect the position where an external proximity object contacts or approaches.

[0113] Here, the TFT substrate 21 corresponds to a specific example of a "substrate" in the present invention. The pixel electrode 22 corresponds to a specific example of a "pixel electrode" in the present invention. The pixel signal line SGL corresponds to a specific example of a "signal line" in the present invention. The drive electrode COML corresponds to a specific example of a "drive electrode" in the present invention. The liquid crystal element LC corresponds to a specific example of a "display function layer" in the present invention. The source driver 13 and the drive electrode driver 14 correspond to a specific example of a "scanning drive unit" in the present invention. The touch detection unit 40 corresponds to a specific example of a "detection processing unit" in the present invention. The touch detection electrode TDL corresponds to a "touch detection electrode" in the present invention. The color filter 32 corresponds to a "color filter" in the present invention.

[0114] (Action and Effect)

[0115] Next, the operation and effects of the display device with a touch detection function 1 according to the first embodiment will be described.

[0116] The drive electrode COML functions not only as a common drive electrode for the liquid crystal display unit 20 but also as a drive electrode for the touch detection component 30. Therefore, there is a possibility that the drive signals Vcom may affect each other. Therefore, the drive electrode COML is applied with the drive signal Vcom during the display period B, during which display operations are performed, and the touch detection period A, during which touch detection operations are performed. The drive electrode driver 14 applies the drive signal Vcom as a display drive signal during the display period B, during which display operations are performed. Furthermore, the drive electrode driver 14 applies the drive signal Vcom as a touch drive signal during the touch detection period A, during which touch detection operations are performed. In the following description, the drive signal Vcom serving as a display drive signal may be referred to as the display drive signal Vcomd, and the drive signal Vcom serving as a touch drive signal may be referred to as the touch drive signal Vcomt.

[0117] (Overall action summary)

[0118] The control unit 11 supplies control signals to the gate driver 12, source driver 13, drive electrode driver 14, and touch detection unit 40 based on an externally supplied video signal Vdisp, controlling their operation in synchronization. During display period B, the gate driver 12 supplies a scan signal Vscan to the liquid crystal display unit 20, sequentially selecting a horizontal line for display drive. During display period B, the source driver 13 supplies a pixel signal Vpix to each pixel Pix constituting the horizontal line selected by the gate driver 12.

[0119] During display period B, the drive electrode driver 14 applies the display drive signal Vcomd to the drive electrode blocks associated with one horizontal line. During touch detection period A, the drive electrode driver 14 sequentially applies a touch drive signal Vcomt, which has a higher frequency than the display drive signal Vcomd, to the drive electrode blocks involved in the touch detection operation, sequentially selecting one detection block. During display period B, the display unit 10 with a touch detection function performs display operations based on signals supplied by the gate driver 12, source driver 13, and drive electrode driver 14. During touch detection period A, the display unit 10 with a touch detection function performs touch detection operations based on signals supplied by the drive electrode driver 14, and outputs a touch detection signal Vdet from the touch detection electrodes TDL. The analog LPF unit 42 amplifies and outputs the touch detection signal Vdet. The A / D converter 43 converts the analog signal output from the analog LPF unit 42 into a digital signal at a timing synchronized with the touch drive signal Vcomt. Based on the output signal from the A / D converter 43, the signal processing unit 44 detects the presence or absence of a touch on the touch detection element 30. The coordinate extraction unit 45 obtains the touch panel coordinates when the touch detection is completed in the signal processing unit 44. The control unit 11 controls the detection timing control unit 46 to change the sampling frequency of the touch drive signal Vcomt.

[0120] (Detailed actions)

[0121] Next, detailed operations of the display device with a touch detection function 1 will be described. Figure 12 1 is a timing waveform diagram showing an operation example of the display device with a touch detection function according to the first embodiment. Figure 12 As shown, the liquid crystal display unit 20 sequentially scans and displays the scanning signal lines GCL in the order of the (n-1)th row, the adjacent nth row, and the adjacent (n+1)th row in the scanning signal lines GCL, one horizontal line at a time. Similarly, the driving electrode driver 14 sequentially supplies driving signals to the driving electrodes COML of the display unit with a touch detection function 10 in the order of the (m-1)th column, the adjacent mth column, and the adjacent (m+1)th column, based on the control signal supplied by the control unit 11.

[0122] Thus, in the display device 1 with a touch detection function, touch detection operation (touch detection period A) and display operation (display period B) are time-divided during each display horizontal period (1H). During the touch detection operation, different drive electrodes COML are selected and drive signal Vcom is applied during each display horizontal period (1H), thereby performing touch detection scanning. This operation is described in detail below.

[0123] First, the gate driver 12 applies the scanning signal Vscan to the scanning signal line GCL of the (n-1)th row, and the scanning signal Vscan(n-1) changes from a low level to a high level, thereby starting one display horizontal period 1H.

[0124] Next, during the touch detection period A, the driving electrode driver 14 applies the driving signal Vcom to the driving electrode COML of the (m-1)th column, and the driving signal Vcom(m-1) changes from a low level to a high level. The driving signal Vcom(m-1) is transmitted to the touch detection electrode TDL through the electrostatic capacitance, and the touch detection signal Vdet changes. Next, if the driving signal Vcom(m-1) changes from a high level to a low level, the touch detection signal Vdet also changes. The waveform of the touch detection signal Vdet during the touch detection period A is the waveform corresponding to the touch detection signal Vdet in the basic principle of touch detection described above. The A / D conversion unit 43 performs touch detection by performing A / D conversion on the touch detection signal Vdet during the touch detection period A. Thus, in the display device 1 with a touch detection function, touch detection of one detection line is performed.

[0125] Next, in the display period B, the source driver 13 applies the pixel signal Vpix to the pixel signal line SGL to display one horizontal line. Figure 12 As shown, the change in pixel signal Vpix is ​​transmitted to the touch detection electrode TDL via parasitic capacitance, potentially changing the touch detection signal Vdet. However, the A / D converter 43 does not perform A / D conversion during display period B, thereby suppressing the effect of the change in pixel signal Vpix on touch detection. After the source driver 13 finishes supplying the pixel signal Vpix, the gate driver 12 changes the scanning signal Vscan(n-1) of the scanning signal line GCL in the (n-1)th row from a high level to a low level, and the 1 display horizontal period ends.

[0126] Next, the gate driver 12 applies the scanning signal Vscan to the scanning signal line GCL of the nth row different from the previous one, and the scanning signal Vscan(n) changes from the low level to the high level, thereby starting the next one display horizontal period.

[0127] In the next touch detection period A, the drive electrode driver 14 applies the drive signal Vcom to the drive electrode COML in the mth column different from the previous one. Then, the A / D converter 43 performs A / D conversion on the change in the touch detection signal Vdet, thereby performing touch detection on the detection line.

[0128] Next, during display period B, the source driver 13 applies a pixel signal Vpix to the pixel signal line SGL, displaying one horizontal line. Furthermore, because the display device 1 with a touch detection function of this embodiment performs dot inversion drive, the polarity of the pixel signal Vpix applied by the source driver 13 is reversed compared to the pixel signal during the previous display horizontal period. After display period B ends, the display horizontal period 1H ends.

[0129] Thereafter, by repeating the above-described operations, the display device with a touch detection function 1 performs a display operation by scanning the entire display surface, and performs a touch detection operation by scanning the entire touch detection surface.

[0130] As described above, in the display device 1 with a touch detection function, operations are performed in a manner such that the display scanning direction and the touch detection scanning direction are different. This means that during a certain display horizontal period (1H), both display operation and touch detection operation are always performed in a certain pixel Pix. In the display device 1 with a touch detection function, during a single display horizontal period (1H), touch detection operation is performed during touch detection period A, and display operation is performed during display period B. In this way, since the touch detection operation and display operation are performed during different periods, both display operation and touch detection operation can be performed during the same single display horizontal period, and the influence of the display operation on touch detection can be suppressed.

[0131] (Arrangement of touch detection electrodes)

[0132] Figure 13 Schematic diagram showing the arrangement of touch detection electrodes according to the first embodiment. Figure 14 Schematic diagram showing the arrangement of touch detection electrodes in a comparative example. Figure 15 Schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter in a comparative example.

[0133] like Figure 13 As shown, the touch detection electrodes TDL according to the first embodiment, arranged on the counter substrate 3, are connected to the touch detection unit 40 via detection wiring TDG. The touch detection electrodes TDL are formed of at least one metal material selected from aluminum (Al), copper (Cu), silver (Ag), or alloys thereof. As a material for a transparent electrode, the at least one metal material selected from aluminum (Al), copper (Cu), silver (Ag), or alloys thereof has lower resistance than transparent conductive oxides such as ITO (Indium Tin Oxide). Because the at least one metal material selected from aluminum (Al), copper (Cu), silver (Ag), or alloys thereof has light-shielding properties compared to transparent conductive oxides such as ITO, there is a possibility that transmittance may decrease or the pattern of the touch detection electrodes TDL may be visually recognized.

[0134] Therefore, the opposing substrate 3 arranges the dummy electrodes TDD that are not connected to the touch detection unit 40 between the touch detection electrodes TDL and in parallel with the extension direction of the touch detection electrodes TDL. The dummy electrodes TDD are formed of the same material as the touch detection electrodes TDL. As a result, the visibility caused by the light shielding of the touch detection electrodes TDL is alleviated. The description of the prescribed pitch of the metal wiring of the touch detection electrodes TDL in the following embodiments 1, 2, 3, 4 and the modified examples can also be applied to the prescribed pitch between the metal wiring of the dummy electrodes TDD (touch detection electrode pitch). Similarly, the description of the prescribed pitch of the metal wiring of the touch detection electrodes TDL in the following embodiments 1, 2, 3, 4 and the modified examples can also be applied to the prescribed pitch between the metal wiring of the touch detection electrodes TDL and the metal wiring of the dummy electrodes TDD.

[0135] As described above, the driving electrodes COML according to the first embodiment are opposite to the pixel electrodes 22 in a direction perpendicular to the surface of the TFT substrate 21 and extend in a direction parallel to the direction in which the pixel signal lines SGL extend. Figure 13 The touch detection electrode TDL is shown in FIG. Figure 10 The metal wirings shown extend in directions different from the directions in which the pixel signal lines SGL that supply the pixel signals Vpix to the pixel electrodes 22 extend, and the metal wirings are arranged at a predetermined pitch.

[0136] However, the driving electrode COML may extend in a direction different from the direction in which the above-mentioned pixel signal line SGL extends, facing the pixel electrode 22 in a direction perpendicular to the surface of the TFT substrate 21. Figure 14 The touch detection electrode TDL is shown in FIG. Figure 10 The metal wirings extend in a direction parallel to the direction in which the pixel signal lines SGL for supplying pixel signals Vpix to the pixel electrodes 22 extend, and the metal wirings are arranged at a predetermined pitch. Figure 14 In the case of metal wirings of the touch detection electrodes TDL arranged as shown, Figure 15 As shown, there is a possibility that the specific color region 32B of the color filter 32 is blocked. Figure 1 The color filter 32 shown has color regions 32R, 32G, and 32B colored in red (R), green (G), and blue (B). Generally, the color regions 32R, 32G, and 32B extend in the directions in which the pixel signal lines SGL extend. Figure 15The touch detection electrodes TDL shown are metal wirings extending in a direction parallel to the direction in which the pixel signal lines SGL extend. Therefore, for example, only the light-shielding color region 32B may cause the liquid crystal display unit 20 to deviate from the color originally displayed.

[0137] Figure 16 This is a schematic diagram for explaining the relationship between the arrangement of the touch detection electrodes and the color areas of the color filter involved in the first embodiment. Figure 13 As shown in FIG. 1 , the touch detection electrode TDL is a metal wiring extending in a direction different from the direction in which the pixel signal line SGL extends. Figure 16 As shown, the color regions 32R, 32G, and 32B of the color filter 32 intersect with the touch detection electrodes TDL in a three-dimensional manner. Therefore, the touch detection electrodes TDL evenly shield each color region 32R, 32G, and 32B from light. As a result, the liquid crystal display unit 20 can minimize the possibility of color shift from the intended display color.

[0138] like Figure 16 As shown, the touch detection electrodes TDL are arranged at intervals of a natural number multiple (for example, 1) of the pixel pitch vl of the pixels Pix of the plurality of pixel electrodes 22 arranged in a matrix. In this case, the touch detection electrode pitch pl, which is the interval between adjacent touch detection electrodes TDL, is equal to the pixel pitch vl of the pixels Pix in the direction orthogonal to the extension direction of the touch detection electrode TDL. Alternatively, although the touch detection electrode pitch pl is also based on the pixel size, it can be a natural number multiple of more than 1 times and less than 10 times the pixel pitch vl. Alternatively, although the touch detection electrode pitch pl is also based on the pixel size, it can be an interval of more than 50 μm and less than 500 μm. As a result, the touch detection electrode TDL passes through the edge of the pixel Pix, and therefore, the transmittance of the pixel Pix can be suppressed from decreasing. Furthermore, as a measure to counteract moire interference, the touch detection electrode pitch p1 can be configured with a fluctuating pitch, or can be randomly arranged within a range of approximately 10% of (width of display area / number of detection electrodes) (e.g., 50 μm for a 500 μm pitch). Here, the number of detection electrodes refers to the total number of dummy electrodes TDD and touch detection electrodes TDL, and the width of the display area refers to the length of the displayable area of ​​the liquid crystal display unit 20 in a direction perpendicular to the extension direction of the touch detection electrodes TDL.

[0139] (Effect)

[0140] As described above, the display device with a touch detection function 1 according to the first embodiment uses metal touch detection electrodes TDL. However, the metal touch detection electrodes TDL can be used to suppress a decrease in transmittance or visual recognition of the touch detection electrode TDL pattern. As a result, the touch detection electrodes TDL can achieve low resistance, enabling the display device with a touch detection function 1 to be thinner, have a larger screen, or achieve higher resolution.

[0141] Furthermore, the display device with a touch detection function 1 according to the first embodiment can suppress the possibility that the liquid crystal display unit 20 may cause a color shift that is originally intended to be displayed.

[0142] (Variation 1 of Embodiment 1)

[0143] Figure 17 Schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color areas of the color filter according to the first modification of the first embodiment. Figure 17 As shown, the touch detection electrodes TDL are arranged at intervals that are a natural multiple (e.g., 2) of the pitch of the pixels Pix of the plurality of pixel electrodes 22 arranged in a matrix. In this case, the touch detection electrode pitch p1, which is the interval between adjacent touch detection electrodes TDL, is equal to twice the pixel pitch vl of the pixels Pix in a direction orthogonal to the extension direction of the touch detection electrodes TDL. As a result, the touch detection electrodes TDL pass through the edges of the pixels Pix, thereby suppressing a decrease in the transmittance of the pixels Pix.

[0144] (Variation 2 of Embodiment 1)

[0145] Figure 18 Schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color area of ​​the color filter according to the second modification of the first embodiment. Figure 18 As shown, the touch detection electrodes TDL are arranged at intervals that are a natural number multiple (e.g., 2 times) of the pitch of the pixels Pix of the plurality of pixel electrodes 22 arranged in a matrix. In this case, the touch detection electrode pitch pl, which is the interval between adjacent touch detection electrodes TDL, is equal to 2 times the pixel pitch vl of the pixels Pix in the direction orthogonal to the extending direction of the touch detection electrodes TDL. Figure 18 As shown, the touch detection electrode TDL is a metal wiring described as follows: by regularly having a bend TDQ, it has an angle with the direction along the edge of the pixel Pix and extends in a direction different from the direction in which the pixel signal line SGL extends. By having the bend TDQ, light that hits the touch detection electrode TDL and is scattered is dispersed, which can suppress light interference and suppress the occurrence of Newton rings or Moire interference. In addition, the touch detection electrode TDL is as shown in FIG. Figure 18As shown, the color regions 32R, 32G, and 32B of the color filter 32 three-dimensionally intersect with the touch detection electrodes TDL.

[0146] (Variation 3 of Embodiment 1)

[0147] Figure 19 Schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color area of ​​the color filter according to the third modification of the first embodiment. Figure 19 As shown, the touch detection electrodes TDL are arranged at intervals that are a natural number multiple (e.g., 2 times) of the pitch of the pixels Pix of the plurality of pixel electrodes 22 arranged in a matrix. In this case, the touch detection electrode pitch pl, which is the interval between adjacent touch detection electrodes TDL, is equal to 2 times the pixel pitch vl of the pixels Pix in the direction orthogonal to the extending direction of the touch detection electrodes TDL. Figure 19 As shown, the touch detection electrode TDL is a metal wiring as described below: by regularly having bending portions TDQD and TDQU, it has an angle with the direction along the edge of the pixel Pix and extends in a direction different from the direction in which the pixel signal line SGL extends. By having different bending portions TDQD and TDQU on adjacent touch detection electrodes TDL, light that hits the touch detection electrode TDL and is scattered is dispersed, which can suppress light interference and suppress the occurrence of Newton rings or Moiré interference. In addition, the touch detection electrode TDL is as shown in FIG. Figure 19 As shown, the color regions 32R, 32G, and 32B of the color filter 32 three-dimensionally intersect with the touch detection electrodes TDL.

[0148] (Variation 4 of Embodiment 1)

[0149] Figure 20 This is a cross-sectional view schematically illustrating the cross-sectional structure of a display unit with a touch detection function according to a fourth variation of the first embodiment. The display unit with a touch detection function 10 includes a pixel substrate 2, an opposing substrate 3 disposed perpendicularly to the surface of the pixel substrate 2 and facing the pixel substrate 2, and a liquid crystal layer 6 interposed between the pixel substrate 2 and the opposing substrate 3. Furthermore, the opposing substrate 3 includes a glass substrate 31 and a color filter 32 formed on one surface of the glass substrate 31. Touch detection electrodes TDL, which serve as detection electrodes for the touch detection element 30, are formed on the other surface of the glass substrate 31. Furthermore, a polarizing plate 35A is provided on the touch detection electrodes TDL.

[0150] The pixel substrate 2 includes a TFT substrate 21 serving as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix on the TFT substrate 21, a plurality of drive electrodes COML formed between the TFT substrate 21 and the pixel electrodes 22, and an incident-side polarizer 35B arranged on the lower surface side of the TFT substrate 21.

[0151] (Variation 5 of Embodiment 1)

[0152] Figure 21 This is a cross-sectional view schematically illustrating the cross-sectional structure of a display unit with a touch detection function according to a fifth variation of the first embodiment. The display unit with a touch detection function 10 includes a pixel substrate 2, an opposing substrate 3 disposed opposite the pixel substrate 2 in a direction perpendicular to the surface of the pixel substrate 2, and a liquid crystal layer 6 interposed between the pixel substrate 2 and the opposing substrate 3. Furthermore, in the opposing substrate 3, one surface of a glass substrate 31A and one surface of a glass substrate 31B are bonded together via an adhesive layer 31P. A color filter 32 is formed on the other surface of the glass substrate 31B. Touch detection electrodes TDL are formed on one surface of the glass substrate 31A, and a polarizing plate 35A is provided on the touch detection electrodes TDL. The glass substrates 31B and 31A are bonded together via an adhesive layer 31P, thereby sandwiching the touch detection electrodes TDL between the glass substrates 31B and 31A.

[0153] The pixel substrate 2 includes a TFT substrate 21 serving as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix on the TFT substrate 21, a plurality of drive electrodes COML formed between the TFT substrate 21 and the pixel electrodes 22, and an incident-side polarizer 35B arranged on the lower surface side of the TFT substrate 21.

[0154] (Sixth Modification of the First Embodiment)

[0155] Figure 22 This is a cross-sectional view schematically illustrating the cross-sectional structure of a display unit with a touch detection function according to a sixth variation of the first embodiment. The display unit with a touch detection function 10 includes a pixel substrate 2, an opposing substrate 3 disposed opposite the pixel substrate 2 in a direction perpendicular to the surface of the pixel substrate 2, and a liquid crystal layer 6 interposed between the pixel substrate 2 and the opposing substrate 3. Furthermore, in the opposing substrate 3, one surface of a glass substrate 31A and one surface of a glass substrate 31B are bonded together via an adhesive layer 31P. A color filter 32 is formed on the other surface of the glass substrate 31B. Touch detection electrodes TDL are formed on one surface of the glass substrate 31A, and a polarizing plate 35A is provided on the other surface of the glass substrate 31A. The glass substrates 31B and 31A are bonded together via an adhesive layer 31P, thereby sandwiching the touch detection electrodes TDL between the glass substrates 31B and 31A.

[0156] The pixel substrate 2 includes a TFT substrate 21 serving as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix on the TFT substrate 21, a plurality of drive electrodes COML formed between the TFT substrate 21 and the pixel electrodes 22, and an incident-side polarizer 35B arranged on the lower surface side of the TFT substrate 21.

[0157] (Variation 7 of Embodiment 1)

[0158] Figure 23 : This is a cross-sectional view showing the schematic cross-sectional structure of a display unit with a touch detection function according to a seventh variant of the first embodiment. In the seventh variant of the first embodiment, the aforementioned drive electrode COML functions as a common drive electrode of the liquid crystal display unit 20, and the drive electrode Comt functions as a drive electrode of the touch detection component 30. In other words, the display unit 10 with a touch detection function is a so-called on-cell type device in which an electrostatic capacitive touch detection component 30 is mounted on a liquid crystal display unit 20 that uses a liquid crystal display element as a display element. Therefore, the drive electrode driver 14 applies the drive signal Vcom as a display drive signal to the drive electrode COML during the display period B when the display action is performed. In addition, the drive electrode driver 14 applies the drive signal Vcom as a touch drive signal to the drive electrode COMLt during the touch detection period A when the touch detection action is performed.

[0159] The display unit 10 with a touch detection function includes a pixel substrate 2, an opposing substrate 3 arranged to oppose the pixel substrate 2 in a direction perpendicular to the surface of the pixel substrate 2, and a liquid crystal layer 6 interposed between the pixel substrate 2 and the opposing substrate 3. Furthermore, in the opposing substrate 3, one surface of a glass substrate 31A and one surface of a glass substrate 31B are bonded together via an adhesive layer 31P. A color filter 32 is formed on the other surface of the glass substrate 31B. A plurality of drive electrodes COMLt are formed on the surface of the color filter 32. Touch detection electrodes TDL are formed on one surface of the glass substrate 31A, and a polarizing plate 35A is provided on the other surface of the glass substrate 31A. The glass substrates 31B and 31A are bonded together via an adhesive layer 31P, thereby sandwiching the touch detection electrodes TDL between the glass substrates 31B and 31A.

[0160] The pixel substrate 2 includes a TFT substrate 21 serving as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix on the TFT substrate 21, a plurality of drive electrodes COML formed between the TFT substrate 21 and the pixel electrodes 22, and an incident-side polarizer 35B provided on the lower surface of the TFT substrate 21. As described above, the display unit with a touch detection function 10 according to the seventh modification of the first embodiment is a display unit in which a capacitive touch detection component is mounted on a liquid crystal display unit.

[0161] (1-2. Implementation Method 2)

[0162] Next, a display device 1 with a touch detection function according to a second embodiment will be described. Figure 24 This is a cross-sectional view schematically showing a cross-sectional structure of a display unit with a touch detection function according to the second embodiment. Figure 25 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to Embodiment 2. Components identical to those described in Embodiment 1 are denoted by the same reference numerals, and repeated description thereof will be omitted.

[0163] The display unit 10 with a touch detection function includes a pixel substrate 2, a counter substrate 3 disposed perpendicularly to the surface of the pixel substrate 2 and facing the pixel substrate 2, and a liquid crystal layer 6 interposed between the pixel substrate 2 and the counter substrate 3. In the counter substrate 3, one surface of a glass substrate 31A and one surface of a glass substrate 31B are bonded together via an adhesive layer 31P. A color filter 32 is formed on the other surface of the glass substrate 31B. Touch detection electrodes TDL are formed on the surface of the color filter 32, and a polarizing plate 35A is provided on the other surface of the glass substrate 31A.

[0164] The pixel substrate 2 includes a TFT substrate 21 serving as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix on the TFT substrate 21, a plurality of drive electrodes COML formed between the TFT substrate 21 and the pixel electrodes 22, and an incident-side polarizer 35B arranged on the lower surface side of the TFT substrate 21.

[0165] like Figure 24 As shown in FIG. 1 , the touch detection electrode TDL is arranged at a position closer to the liquid crystal layer 6 than the color filter 32. Figure 25 As shown in FIG. 1 , a light shielding layer BM having a light shielding function and being the same layer as the color filter 32 and called a black matrix is ​​arranged at the edge of the pixel Pix. If the touch detection electrode TDL is a metal wiring extending in a direction different from the direction in which the pixel signal line SGL extends, then Figure 25 As shown, the color regions 32R, 32G, and 32B of the color filter 32 intersect the touch detection electrodes TDL in a three-dimensional manner. In this case, the touch detection electrodes TDL extend in the direction of the light shielding layer BM and are perpendicularly closer to the pixel electrodes 22 than the light shielding layer BM. Therefore, the decrease in transmittance caused by the touch detection electrodes TDL is comparable to the decrease in transmittance caused by the light shielding layer BM, minimizing the decrease in transmittance caused by the metal formation of the touch detection electrodes TDL.

[0166] (Variation of Embodiment 2)

[0167] Figure 26 This is a cross-sectional view schematically illustrating the cross-sectional structure of a display unit with a touch detection function according to a modified example of the second embodiment. The display unit with a touch detection function 10 includes a pixel substrate 2, an opposing substrate 3 disposed perpendicularly to the surface of the pixel substrate 2 and facing the pixel substrate 2, and a liquid crystal layer 6 interposed between the pixel substrate 2 and the opposing substrate 3. Furthermore, in the opposing substrate 3, one surface of a glass substrate 31A and one surface of a glass substrate 31B are bonded together via an adhesive layer 31P. A color filter 32 is formed on the other surface of the glass substrate 31B. A polarizing plate 35A is provided on the other surface of the glass substrate 31A.

[0168] The pixel substrate 2 includes a TFT substrate 21 serving as a circuit substrate, a plurality of pixel electrodes 22 arranged in a matrix on the TFT substrate 21, a touch detection electrode TDL formed on the same layer as the pixel electrode 22, a plurality of driving electrodes COML formed between the TFT substrate 21 and the pixel electrode 22, and an incident side polarizing plate 35B arranged on the lower surface side of the TFT substrate 21.

[0169] (Effect)

[0170] As described above, the display device with a touch detection function 1 according to the second embodiment uses metal touch detection electrodes TDL. However, the metal touch detection electrodes TDL can be used to suppress a decrease in transmittance or visual recognition of the touch detection electrode TDL pattern. As a result, the touch detection electrodes TDL can be made less resistive, allowing the display device with a touch detection function 1 to be thinner, have a larger screen, or achieve higher resolution.

[0171] (1-3. Implementation Method 3)

[0172] Next, a display device 1 with a touch detection function according to a third embodiment will be described. Figure 27 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to Embodiment 3. Components identical to those described in Embodiments 1 and 2 are denoted by the same reference numerals, and repeated descriptions thereof are omitted.

[0173] The driving electrodes COML according to the third embodiment face the pixel electrodes 22 in a direction perpendicular to the surface of the TFT substrate 21 and extend in a direction different from the direction in which the above-mentioned pixel signal lines SGL extend. Figure 27 The touch detection electrode TDL is shown in FIG. Figure 10As shown, the metal wiring extends in a direction parallel to the direction in which the pixel signal line SGL for supplying the pixel signal Vpix to each pixel electrode 22 extends, and the metal wiring is arranged at a predetermined pitch. Figure 27 As shown, in the case of the metal wiring where the touch detection electrodes TDL are arranged, the metal wiring has regular bends TDQL and TDQR in order not to shield the specific color area of ​​the color filter 32. Figure 27 As shown, the metal wiring of the touch detection electrode TDL is a zigzag line formed by folding back at bends TDQL and TDQR at regular intervals relative to a straight line perpendicular to the scanning signal line GCL. For example, the angle θ is between 5 degrees and 75 degrees, preferably between 25 degrees and 40 degrees, and more preferably between 50 degrees and 65 degrees. Furthermore, the metal wiring of the touch detection electrode TDL can be arranged with undulations within a preferred range. Thus, the metal wiring of the touch detection electrode TDL meanders and intersects the color regions 32R, 32G, and 32B of the color filter 32 in a three-dimensional manner. Furthermore, the extension direction of the touch detection electrode TDL is angled relative to the extension direction of the color regions 32R, 32G, and 32B of the color filter 32. As a result, the metal wiring of the touch detection electrode TDL sequentially shields the color regions 32R, 32G, and 32B of the color filter 32 from light, thereby suppressing a decrease in transmittance in specific color regions of the color filter 32. Furthermore, one detection block can conduct the plurality of touch detection electrodes TDL via the detection wiring TDG, thereby making it possible to use the plurality of touch detection electrodes TDL.

[0174] (Variation of the third embodiment)

[0175] Figure 28 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to a modification of the third embodiment. Figure 28 The touch detection electrode TDL is shown in FIG. Figure 10 As shown, the metal wiring extends in a direction parallel to the direction in which the pixel signal line SGL for supplying the pixel signal Vpix to each pixel electrode 22 extends, and the metal wiring is arranged at a predetermined pitch. Figure 28 As shown, when the metal wiring of the touch detection electrodes TDL is arranged, the bends TDQL and TDQR are regularly provided so as not to block the specific color area of ​​the color filter 32. Therefore, the metal wiring of the touch detection electrodes TDL intersects at the intersection TDQX on the same plane. The touch detection electrodes TDL that are conductive at the intersection TDQX operate as one detection block. Figure 28As shown, the metal wiring of the touch detection electrode TDL is a Z-shaped line formed by bending at the bends TDQL and TDQR at a certain interval with respect to a straight line perpendicular to the above-mentioned scanning signal line GCL at an angle θ. For example, the angle θ is greater than 5 degrees and less than 75 degrees, preferably greater than 25 degrees and less than 40 degrees, and more preferably greater than 50 degrees and less than 65 degrees. In addition, the metal wiring of the touch detection electrode TDL can be configured to have fluctuations within a preferred range. Moreover, the metal wiring of the touch detection electrode TDL is meandering and wired in a manner that three-dimensionally intersects with the various color regions 32R, 32G, and 32B of the color filter 32. As a result, the metal wiring of the touch detection electrode TDL sequentially shields the various color regions 32R, 32G, and 32B of the color filter 32 from light, thereby suppressing the decrease in transmittance in specific color regions of the color filter 32.

[0176] (Effect)

[0177] As described above, the display device with a touch detection function 1 according to the third embodiment uses metal touch detection electrodes TDL. However, the metal touch detection electrodes TDL can be used to suppress a decrease in transmittance or visual recognition of the touch detection electrode TDL pattern. As a result, the touch detection electrodes TDL can achieve low resistance, enabling the display device with a touch detection function 1 to be thinner, have a larger screen, or achieve higher resolution.

[0178] (1-4. Implementation Method 4)

[0179] Next, a display device 1 with a touch detection function according to a fourth embodiment will be described. Figure 29 It is a cross-sectional view schematically showing a cross-sectional structure of a touch detection electrode according to the fourth embodiment. Figure 30 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to Embodiment 4. Components identical to those described in Embodiments 1 and 2 are denoted by the same reference numerals, and repeated descriptions thereof are omitted.

[0180] The drive electrodes COML according to the fourth embodiment are opposite to the pixel electrodes 22 in a direction perpendicular to the surface of the TFT substrate 21 and extend in a direction different from the direction in which the above-mentioned pixel signal lines SGL extend. Figure 14 The touch detection electrode TDL is shown in FIG. Figure 10 The metal wirings extend in a direction parallel to the direction in which the pixel signal lines SGL supplying pixel signals Vpix to the pixel electrodes 22 extend, and the metal wirings are arranged at a predetermined pitch plm. It is preferred that the predetermined pitch plm between the metal wirings is not less than 10 μm and not more than 500 μm. Figure 14In the case where the metal wiring of the touch detection electrodes TDL is arranged as shown, Figure 15 As shown, there is a possibility that a specific color area 32B of the light-shielding filter 32 exists. Figure 29 as well as Figure 30 The touch detection electrode TDL is shown in FIG. Figure 10 As shown, transparent electrodes TDLi made of ITO or the like extend in a direction parallel to the direction in which pixel signal lines SGL, which supply pixel signals Vpix to each pixel electrode 22, extend. These transparent electrodes TDLi are arranged at a predetermined pitch. However, since transparent electrodes TDLi made of ITO or the like have high resistance, the touch detection electrodes TDL are formed by laminating metal touch electrodes (metal electrodes) TDLm made of at least one metal material such as aluminum (Al), copper (Cu), silver (Ag), or alloys thereof on the transparent electrodes TDLi. This reduces the resistance of the touch detection electrodes TDL only in the portion containing the transparent electrodes TDLi.

[0181] If the metal touch electrode TDLm is continuous in the direction in which the transparent electrode TDLi extends, there is a possibility that the specific color region 32B of the color filter 32 is shielded. Figure 30 As shown, the metal touch electrode TDLm is disconnected in the direction of the transparent electrode TDLi's extension and electrically connected by the transparent electrode TDLi. Similarly to the dummy electrode TDD and the touch detection electrode TDL, the metal touch electrode (metal electrode) TDLm is laminated on the transparent electrode TDLi. This mitigates visibility caused by light blocking of the touch detection electrode TDL. Furthermore, the transparent electrode TDLi is insulated at the gap TDDS.

[0182] Figure 31 This is a schematic diagram for explaining the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the first modification of the fourth embodiment. As the ratio of the metal touch electrode TDLm being disconnected in the direction in which the transparent electrode TDLi extends increases, a decrease in transmittance can be suppressed.

[0183] Figure 32 This is a schematic diagram illustrating the relationship between the arrangement of touch detection electrodes and the color regions of the color filter according to the second variation of the fourth embodiment. Metal touch electrodes TDLm are arranged in the color regions 32R, 32G, and 32B of the color filter 32. This suppresses a decrease in transmittance in specific color regions of the color filter 32. By arranging the metal touch electrodes somewhat irregularly, the display device 1 with a touch detection function according to the fourth embodiment can suppress moiré interference.

[0184] (Effect)

[0185] As described above, the display device with a touch detection function 1 according to the fourth embodiment uses metal touch detection electrodes TDL. However, the use of metal touch electrodes TDLm can suppress a decrease in transmittance or visual recognition of the touch detection electrode TDL pattern. As a result, the touch detection electrodes TDL can achieve low resistance, enabling the display device with a touch detection function 1 to be thinner, have a larger screen, or achieve higher resolution.

[0186] (1-5. Other Embodiments and Modifications)

[0187] Although several embodiments and modifications have been cited and described above, the present invention is not limited to these embodiments and various modifications are possible.

[0188] In the above embodiment, as shown in the above embodiment 1, each driving electrode COML is driven and scanned. However, this is not limited to this. This method can also be replaced by, for example, driving a specified number of driving electrodes COML and shifting the driving electrodes COML one by one to scan.

[0189] Furthermore, in the display device 1 with a touch detection function according to each of the above-described embodiments and variations, the liquid crystal display unit 20 using liquid crystals in various modes, such as TN, VA, and ECB, and the touch detection component 30 may be integrated to form the display unit 10 with a touch detection function. Alternatively, the display unit 10 with a touch detection function may also integrate a liquid crystal display unit using liquid crystals in a transverse electric field mode, such as FFS (Fringe Field Switching) or IPS (In-Plane Switching), and the touch detection component.

[0190] For example, the display device 1 with a touch detection function can use a liquid crystal in a transverse electric field mode. In addition, in the above-mentioned embodiments, a so-called in-cell type is adopted in which a liquid crystal display unit and an electrostatic capacitance type touch detection component are integrated. However, this is not limited to this. Instead, this method can be replaced, for example, by installing an electrostatic capacitance type touch detection component on the liquid crystal display unit. In this case, through the above-mentioned structure, touch detection can be performed while suppressing external noise and noise transmitted from the liquid crystal display unit (noise corresponding to the internal noise in the above-mentioned embodiments).

[0191] (2. Application Examples)

[0192] Below, refer to Figures 33 to 44Application examples of the display device with a touch detection function 1 described in the embodiment and the modified example will be described. Figures 33 to 44 This figure illustrates an example of an electronic device incorporating a display device with a touch detection function according to this embodiment. The display device 1 with a touch detection function according to the first, second, third, and fourth embodiments, as well as their variations, can be applied to electronic devices in all fields, including televisions, digital cameras, notebook personal computers, portable terminals such as mobile phones, and video cameras. In other words, the display device 1 with a touch detection function according to the first, second, third, and fourth embodiments, as well as their variations, can be applied to electronic devices in all fields that display an image or video from an externally input video signal or an internally generated video signal.

[0193] (Application Example 1)

[0194] Figure 33 The electronic device shown is a television device that uses the display device 1 with a touch detection function according to the first, second, third, fourth, and modified examples. The television device includes, for example, an image display screen portion 510 including a front panel 511 and a filter glass 512. The image display screen portion 510 is the display device with a touch detection function according to the first, second, third, fourth, and modified examples.

[0195] (Application Example 2)

[0196] Figure 34 as well as Figure 35 The electronic device shown is a digital camera that uses the display device 1 with a touch detection function according to the first, second, third, and fourth embodiments and their modifications. The digital camera includes, for example, a light-emitting unit 521 for a flash, a display unit 522, a menu switch 523, and a shutter button 524. The display unit 522 is the display device with a touch detection function according to the first, second, third, and fourth embodiments and their modifications.

[0197] (Application Example 3)

[0198] Figure 36 The electronic device shown shows the appearance of a camera that employs the display device 1 with a touch detection function according to the first, second, third, and fourth embodiments and their modifications. This camera includes, for example, a main body 531, a lens 532 for photographing a subject, located on the front side of the main body 531, a start / stop switch 533 for photographing, and a display 534. The display 534 is the display device with a touch detection function according to the first, second, third, and fourth embodiments and their modifications.

[0199] (Application Example 4)

[0200] Figure 37The electronic device shown is a notebook personal computer that uses the display device 1 with a touch detection function according to the first, second, third, and fourth embodiments and their modifications. This notebook personal computer includes, for example, a main body 541, a keyboard 542 for inputting characters, etc., and a display unit 543 for displaying images. The display unit 543 is the display device with a touch detection function according to the first, second, third, and fourth embodiments and their modifications.

[0201] (Application Example 5)

[0202] Figures 38 to 44 The electronic device shown is a mobile phone that employs the display device 1 with a touch detection function according to the first, second, third, and fourth embodiments and their variations. This mobile phone, for example, has an upper housing 551 and a lower housing 552 connected by a connection portion (hinge portion) 553, and includes a display 554, a sub-display 555, a flash (picture light) 556, and a camera 557. The display 554 or the sub-display 555 is the display device with a touch detection function according to the first, second, third, and fourth embodiments and their variations.

[0203] (3. Aspects of the Invention)

[0204] The present invention includes the following aspects. (1)

[0206] A display device with a touch detection function, comprising:

[0207] substrate;

[0208] a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate;

[0209] a plurality of signal lines extending on a plane parallel to the surface of the substrate and supplying pixel signals for displaying an image to the pixel electrodes;

[0210] A display function layer, performing an image display function based on the pixel signal;

[0211] a driving electrode facing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction parallel to the direction in which the signal line extends; and

[0212] A plurality of touch detection electrodes are provided. The touch detection electrodes are metal wirings that face the drive electrodes in the vertical direction and extend in a direction different from the direction in which the signal lines extend. The metal wirings are arranged at a predetermined pitch and are capacitively coupled to the drive electrodes. (2)

[0214] The display device with a touch detection function according to (1) has:

[0215] a color filter, facing the display function layer in the vertical direction, the color filter having a plurality of color regions including at least one of a color region colored red, a color region colored green, and a color region colored blue,

[0216] The extension direction of each color area of ​​the color filter is consistent with the extension direction of the signal line.

[0217] The plurality of touch detection electrodes three-dimensionally intersect with the color regions of the color filter. (3)

[0219] The display device with a touch detection function according to (1) above, wherein the metal wirings are arranged at intervals that are a natural number of multiples of a pixel pitch of the display function layer. (4)

[0221] According to the display device with a touch detection function described in (3), the touch detection electrode is located in a layer closer to the display function layer than a light shielding layer that shields the edge portion of the pixel. (5)

[0223] The display device with a touch detection function according to (1) above, wherein the touch detection electrode has a bent portion. (6)

[0225] A display device with a touch detection function, comprising:

[0226] substrate;

[0227] a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate;

[0228] a plurality of signal lines extending on a plane parallel to the surface of the substrate and supplying pixel signals to the pixel electrodes;

[0229] A display function layer, performing an image display function based on the pixel signal;

[0230] a driving electrode, facing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction different from the direction in which the signal line extends;

[0231] a plurality of touch detection electrodes, the touch detection electrodes being metal wirings opposed to the drive electrodes in the vertical direction, the metal wirings being arranged at a predetermined pitch and capacitively coupled to the drive electrodes; and

[0232] a color filter, facing the display function layer in the vertical direction, the color filter having a plurality of color regions including at least one of a color region colored red, a color region colored green, and a color region colored blue,

[0233] The plurality of touch detection electrodes extend in parallel with the direction in which the signal lines extend, and three-dimensionally intersect with the color regions of the color filter. (7)

[0235] According to the display device with a touch detection function described in (6), the touch detection electrode has a curved portion, and the curved portion is formed by an extension direction of the touch detection electrode having an angle with respect to an extension direction of each color area of ​​the color filter. (8)

[0237] A display device with a touch detection function, comprising:

[0238] substrate;

[0239] a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate;

[0240] a plurality of signal lines extending on a plane parallel to the surface of the substrate and supplying pixel signals to the pixel electrodes;

[0241] A display function layer, performing an image display function based on the pixel signal;

[0242] a driving electrode, facing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction different from the direction in which the signal line extends;

[0243] a plurality of touch detection electrodes, which are opposite to the drive electrodes in the vertical direction, are arranged at a predetermined pitch, and are capacitively coupled to the drive electrodes; and

[0244] a color filter, facing the display function layer in the vertical direction, the color filter having a plurality of color regions including at least one of a color region colored red, a color region colored green, and a color region colored blue,

[0245] The plurality of touch detection electrodes include a transparent electrode extending along a specific color region of the color filter, and a metal electrode which is disconnected in an extending direction and laminated on the transparent electrode. (9)

[0247] According to the display device with a touch detection function described in (1), the touch detection electrode detects the external proximity object by utilizing a change in electrostatic capacitance caused by the approach or contact of the external proximity object. (10)

[0249] The display device with a touch detection function according to (1) comprises:

[0250] A scan driving unit applies a display driving signal to the driving electrodes during a display operation period and applies a touch driving signal to the driving electrodes during a touch detection operation period. (11)

[0252] An electronic device has a display device with a touch detection function capable of detecting an external approaching object, wherein:

[0253] The display device with touch detection function includes:

[0254] substrate;

[0255] a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate;

[0256] a plurality of signal lines extending on a plane parallel to the surface of the substrate and supplying pixel signals for displaying an image to the pixel electrodes;

[0257] A display function layer, performing an image display function based on the pixel signal;

[0258] a driving electrode facing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction parallel to the direction in which the signal line extends; and

[0259] A plurality of touch detection electrodes are provided. The touch detection electrodes are metal wirings that face the drive electrodes in the vertical direction and extend in a direction different from the direction in which the signal lines extend. The metal wirings are arranged at a predetermined pitch and are capacitively coupled to the drive electrodes. (12)

[0261] An electronic device has a display device with a touch detection function capable of detecting an external approaching object, wherein:

[0262] The display device with touch detection function includes:

[0263] substrate;

[0264] a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate;

[0265] a plurality of signal lines extending on a plane parallel to the surface of the substrate and supplying pixel signals to the pixel electrodes;

[0266] A display function layer, performing an image display function based on the pixel signal;

[0267] a driving electrode, facing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction different from the direction in which the signal line extends;

[0268] a plurality of touch detection electrodes, the touch detection electrodes being metal wirings opposed to the drive electrodes in the vertical direction, the metal wirings being arranged at a predetermined pitch and capacitively coupled to the drive electrodes; and

[0269] a color filter, facing the display function layer in the vertical direction, the color filter having a plurality of color regions including at least one of a color region colored red, a color region colored green, and a color region colored blue,

[0270] The plurality of touch detection electrodes extend in parallel with the direction in which the signal lines extend, and three-dimensionally intersect with the color regions of the color filter. (13)

[0272] An electronic device has a display device with a touch detection function capable of detecting an external approaching object, wherein:

[0273] The display device with touch detection function includes:

[0274] substrate;

[0275] a plurality of pixel electrodes arranged in an array on a surface parallel to the surface of the substrate;

[0276] a plurality of signal lines extending on a plane parallel to the surface of the substrate and supplying pixel signals to the pixel electrodes;

[0277] A display function layer, performing an image display function based on the pixel signal;

[0278] a driving electrode, facing the plurality of pixel electrodes in a direction perpendicular to the surface of the substrate and extending in a direction different from the direction in which the signal line extends;

[0279] a plurality of touch detection electrodes, which are opposite to the drive electrodes in the vertical direction, are arranged at a predetermined pitch, and are capacitively coupled to the drive electrodes; and

[0280] A color filter, facing the display function layer in the vertical direction, is colored at least red, green, or blue.

[0281] The plurality of touch detection electrodes include a transparent electrode extending along a specific color region of the color filter, and a metal electrode which is disconnected in an extending direction and laminated on the transparent electrode.

[0282] Description of Reference Numerals

[0283] 1 Display device with touch detection function 2 Pixel substrate

[0284] 3 Counter substrate 6 Liquid crystal layer

[0285] 10 Display unit with touch detection function 11 Control unit

[0286] 12 Gate driver 13 Source driver

[0287] 14 driving electrode driver 20 liquid crystal display unit

[0288] 21 TFT substrate 22 pixel electrode

[0289] 30 touch detection component 31 glass substrate

[0290] 32 color filters 35 polarizing plates

[0291] 40 Touch detection unit 42 Simulation LPF unit

[0292] 43 A / D conversion unit 44 Signal processing unit

[0293] 45 Coordinate Extraction Unit 46 Detection Timing Control Unit

[0294] COML drive electrode GCL scanning signal line

[0295] LC liquid crystal element B display period

[0296] A Pix pixel during touch detection

[0297] R Resistor SGL Pixel signal line

[0298] TDL touch detection electrode TrTFT element

[0299] Vcom driving signal Vdet touch detection signal

[0300] Vdisp video signal Vpix pixel signal

[0301] Vscan scan signal.

Claims

1. A display device with a touch detection function, characterized in that: include: substrate; A plurality of pixels are arranged in a matrix in a first direction and a second direction on a plane parallel to the surface of the substrate, each of the pixels having a plurality of sub-pixels; A plurality of pixel electrodes, each corresponding to one of the plurality of sub-pixels; a plurality of signal lines extending along a first direction on a plane parallel to the surface of the substrate and providing pixel signals for displaying an image to the pixel electrodes; A display function layer, performing an image display function based on the pixel signal; a plurality of touch detection electrodes, all of which are metal wires and extend in the second direction, the touch detection electrodes being arranged along the first direction; as well as a plurality of dummy electrodes, each of which is a metal wire made of the same material as the touch detection electrodes and extending in the second direction, wherein the dummy electrodes are arranged along the first direction and are not connected to a touch detection unit, and the touch detection unit detects a touch based on a detection signal from the touch detection electrodes; each of the touch detection electrodes and the dummy electrodes extends in the second direction and does not extend in the first direction in which each of the signal lines extends, so that the touch detection electrodes do not cross over each other and the dummy electrodes do not cross over each other, The metal lines including the dummy electrodes and the touch detection electrodes are arranged in the first direction at intervals of a first pixel pitch that is a natural multiple of the pixel electrodes, The touch detection electrodes are arranged between the pixels, and a pitch between adjacent touch detection electrodes is equal to a pixel pitch of the pixels in a direction perpendicular to an extending direction of the touch detection electrodes.

2. The display device with a touch detection function according to claim 1, wherein: One touch detection electrode among the plurality of touch detection electrodes and a dummy electrode adjacent to the one touch detection electrode in the first direction are arranged at an interval that is a natural multiple of the first pixel pitch.

3. The display device with a touch detection function according to claim 2, wherein: At least two dummy electrodes are arranged between the touch detection electrodes adjacent to each other along the first direction, The virtual electrodes adjacent to each other along the first direction are arranged at intervals that are a natural multiple of the first pixel pitch, and The touch detection electrodes are arranged at intervals equal to or greater than three times the first pixel pitch.

4. The display device with a touch detection function according to claim 1, wherein: The display device further includes a color filter facing the display function layer in a vertical direction and having a plurality of color regions, the plurality of color regions including at least one of a color region colored in red, a color region colored in green, and a color region colored in blue. The extension direction of each color region of the color filter is consistent with the first direction, and A plurality of the touch detection electrodes spans across each color region of the color filter.

5. The display device with a touch detection function according to claim 1, wherein: The touch detection electrode includes a bent portion.

6. The display device with a touch detection function according to claim 1, wherein: Also includes: a driving electrode facing the plurality of pixel electrodes in a vertical direction relative to the surface of the substrate and extending in the first direction, wherein the touch detection electrode faces the driving electrode in the vertical direction, and the driving electrode extends in the first direction; as well as A scan driving unit applies a display driving signal to the driving electrodes during a display operation and applies a touch driving signal to the driving electrodes during a touch detection operation.

7. The display device with a touch detection function according to claim 1, wherein: The touch detection electrode includes a bent portion, and The bent portion is line-symmetrical with respect to the first direction.

Images