JP2019083038A - Input device and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin input device and a display device. An input device is a conductive first substrate including a first substrate having a first surface and a second surface, and a plurality of first conductive layers formed on the second surface side and formed in one layer. A conductive second electrode formed in a layer different from the electrode portion and the first electrode portion, and the second electrode portion includes a plurality of second conductive layers having a size overlapping with one of the first conductive layers in a plan view. The portion is electrically in contact with at least a part of the first electrode portion, is formed between the first electrode portion and the second electrode portion, and overlaps the first conductive layer and the first conductive layer in a plan view. The light emitting element portion including the light emitting layer electrically in contact with the second conductive layer is formed so as to be insulated from the first conductive layer, and changes according to the coordinates of a nearby object at a position where it overlaps the first surface in a plan view. A third electrode portion for detecting a change in the electric field between the first conductive layer and the first conductive layer is provided. [Selection diagram] FIG. 9

Description

  The present invention relates to an input device and a display device capable of detecting an external proximity object, and more particularly to an input device and a display device capable of detecting an external proximity object approaching from the outside based on a change in capacitance.

  Patent Document 1 describes an input device in which an input device called a so-called touch panel and a lighting device called a front light are integrated.

JP, 2010-198415, A

  The input device described in Patent Document 1 described above is provided at the boundary between the touch panel and the front light so as to be shared by the touch panel and the front light, and is a translucent substrate capable of transmitting light. Although it has been made thinner in recent years, further thinning has been required in recent years.

  The present invention has been made in view of such problems, and an object thereof is to provide a thin input device and a display device.

  According to a first aspect, the input device includes a first substrate having a first surface and a second surface, and a plurality of first conductive layers formed on the second surface and formed in one layer. A conductive second electrode comprising a plurality of conductive first electrode portions and a plurality of second conductive layers formed in a layer different from the first electrode portions and having a size overlapping one of the first conductive layers in plan view A portion electrically connected to at least a portion of the first electrode portion, and formed between the first electrode portion and the second electrode portion, and the first conductive layer, and the first in a plan view A first light emitting element portion including a light emitting layer electrically contacting the second conductive layer overlapping the conductive layer, and a first light emitting element portion insulated from the first conductive layer, and overlapping with the first surface in a plan view A third electrode unit for detecting a change in an electric field between the first conductive layer and the first conductive layer, which changes in accordance with the coordinates of a proximity object; Equipped with a.

  According to a second aspect, the input device includes a first substrate having a first surface and a second surface, and a plurality of first conductive layers formed on the second surface and formed in one layer. A conductive second electrode comprising a plurality of conductive first electrode portions and a plurality of second conductive layers formed in a layer different from the first electrode portions and having a size overlapping one of the first conductive layers in plan view A portion electrically connected to at least a portion of the first electrode portion, and formed between the first electrode portion and the second electrode portion, and the first conductive layer, and the first in a plan view A first light emitting element portion including a light emitting layer electrically contacting the second conductive layer overlapping the conductive layer, and a first light emitting element portion insulated from the first conductive layer, and overlapping with the first surface in a plan view A third electrode unit for detecting a change in an electric field between the first conductive layer and the first conductive layer, which changes in accordance with the coordinates of a proximity object; The provided, pulse rises in the same direction with respect to the first conductive layer and the second conductive layer overlap each other in plan view, the drive signal pulse is applied.

  According to a third aspect, a display device includes a first substrate including a first surface and a second surface, and a plurality of first conductive layers formed on the second surface and formed in one layer. A conductive second electrode comprising a plurality of conductive first electrode portions and a plurality of second conductive layers formed in a layer different from the first electrode portions and having a size overlapping one of the first conductive layers in plan view A portion electrically connected to at least a portion of the first electrode portion, and formed between the first electrode portion and the second electrode portion, and the first conductive layer, and the first in a plan view A first light emitting element portion including a light emitting layer electrically contacting the second conductive layer overlapping the conductive layer, and a first light emitting element portion insulated from the first conductive layer, and overlapping with the first surface in a plan view A third electrode unit for detecting a change in an electric field between the first conductive layer and the first conductive layer, which changes in accordance with the coordinates of a proximity object; An input device comprising a disposed on the second surface side of the input device, a display unit capable of displaying an image on the first surface side.

FIG. 1 is a block diagram for explaining the configuration of the display device according to the first embodiment. FIG. 2 is an explanatory view showing a state in which an external proximity object is not in contact or in proximity, in order to explain the basic principle of the capacitive proximity detection system. FIG. 3 is an explanatory view showing an example of an equivalent circuit in a state where the external proximity object shown in FIG. 2 is not in contact or in proximity. FIG. 4 is an explanatory view showing a state in which an external proximity object is in contact or in proximity, in order to explain the basic principle of the capacitive proximity detection system. FIG. 5 is an explanatory view showing an example of an equivalent circuit in a state where the external proximity object shown in FIG. 4 is in contact or in proximity. FIG. 6 is a diagram illustrating an example of waveforms of the drive signal and the proximity detection signal. FIG. 7 is a perspective view illustrating an example of a drive electrode and a proximity detection electrode of the input device according to the first embodiment. FIG. 8 is a cross-sectional view schematically showing the structure of the display device with a proximity detection function in the first embodiment. FIG. 9 is a cross-sectional view schematically showing the structure of the input device according to the first embodiment. FIG. 10 is a cross-sectional view schematically showing the structure of the input device according to the first embodiment. FIG. 11 is an explanatory diagram for explaining the positional relationship in plan view of the first electrode unit, the second electrode unit, and the third electrode unit of the input device according to the first embodiment. FIG. 12 is an explanatory view for explaining the positional relationship in plan view of the first electrode portion, the second electrode portion, and the third electrode portion of the input device according to the first modification of the first embodiment. FIG. 13 is a cross-sectional view schematically illustrating the structure of the input device according to the second modification of the first embodiment. FIG. 14 is a cross-sectional view schematically illustrating the structure of the input device according to the third modification of the first embodiment. FIG. 15 is an explanatory diagram for describing a first drive electrode driver and a second drive electrode driver according to the first embodiment. FIG. 16 is an explanatory diagram for illustrating voltages of the first electrode portion and the second electrode portion in the drive electrode selection period in the state where the first light emitting element is not lit. FIG. 17 is an explanatory diagram for illustrating voltages of the first electrode portion and the second electrode portion in the drive electrode selection period when the first light emitting element is in the lighted state. FIG. 18 is an explanatory view for explaining voltages of the first electrode portion and the second electrode portion in the drive electrode selection period in the state where the first light emitting element is not lit. FIG. 19 is an explanatory view for explaining voltages of the first electrode portion and the second electrode portion in the drive electrode selection period in the state where the first light emitting element is lit. FIG. 20 is an explanatory diagram for explaining a first drive electrode driver and a second drive electrode driver according to the second embodiment. FIG. 21 is a timing chart of drive control according to the second embodiment. FIG. 22 is a timing chart of drive control according to a modification of the second embodiment.

  Hereinafter, modes (embodiments) for carrying out the invention will be described in detail with reference to the drawings. The present invention is not limited by the contents described in the following embodiments. Further, the components described below include those which can be easily conceived by those skilled in the art and those which are substantially the same. Furthermore, the components described below can be combined as appropriate. The disclosure is merely an example, and it is naturally included within the scope of the present invention as to what can be easily conceived of by those skilled in the art as to appropriate changes while maintaining the gist of the invention. In addition, the drawings may be schematically represented as to the width, thickness, shape, etc. of each portion in comparison with the actual embodiment in order to clarify the description, but this is merely an example, and the interpretation of the present invention is not limited. It is not limited. In the specification and the drawings, the same elements as those described above with reference to the drawings already described may be denoted by the same reference numerals, and the detailed description may be appropriately omitted.

(Embodiment 1)
FIG. 1 is a block diagram for explaining the configuration of the display device according to the first embodiment. The display system 100 includes a display device with proximity detection function 1, a control unit 11, a gate driver 12, a source driver 13, a source selector unit 13S, a first electrode driver 14, a second electrode driver 15, and proximity. And a detection processing unit 40. In the display device 1 with the proximity detection function, as described later, the reflective display unit 9 and the input device 2 are overlapped in a plan view. The display unit 9 is a reflective liquid crystal display unit, and the input device is a capacitive touch panel.

  The display unit 9 is a device that sequentially scans and displays one horizontal line at a time according to a scanning signal Vscan supplied from the gate driver 12 as described later. The control unit 11 supplies control signals to the gate driver 12, the source driver 13, the first electrode driver 14, the second electrode driver 15, and the proximity detection processing unit 40 based on the video signal Vdisp supplied from the outside. And a circuit that controls them to operate in synchronization with each other. The control device in the present invention includes a control unit 11, a gate driver 12, a source driver 13, a first electrode driver 14, a second electrode driver 15, and a proximity detection processing unit 40.

  The gate driver 12 has a function of sequentially selecting one horizontal line to be a target of display drive of the display unit 9 based on a control signal supplied from the control unit 11.

  The source driver 13 is a circuit that supplies a pixel signal Vpix to each pixel (each sub-pixel) arranged in a matrix on the display surface of the display unit 9 based on a control signal supplied from the control unit 11. The source driver 13 generates an image signal Vsig in which the pixel signals Vpix of the plurality of sub-pixels of the display unit 9 are time division multiplexed from the control signal for one horizontal line, and supplies the image signal Vsig to the source selector 13S. Further, the source driver 13 generates a switch control signal Vsel necessary to separate the pixel signal Vpix multiplexed into the image signal Vsig, and supplies the switch control signal Vsel to the source selector 13S together with the image signal Vsig. The source selector unit 13S can reduce the number of wires between the source driver 13 and the source selector unit 13S.

  The first electrode driver 14 is a circuit that supplies a drive signal pulse based on a drive signal to a first electrode portion of the input device 2 described later, based on a control signal supplied from the control unit 11.

  The second electrode driver 15 is a circuit that supplies a drive signal Vel to a second electrode portion of the input device 2 described later, based on a control signal supplied from the control unit 11.

  The proximity detection processing unit 40 detects the presence or absence of the proximity state to the input device 2 based on the control signal supplied from the control unit 11 and the proximity detection signal Vdet supplied from the input device 2 and the proximity state is present. And a circuit for obtaining the coordinates and the like in the proximity detection area. The proximity detection processing unit 40 includes a proximity detection signal amplification unit 42, an A / D conversion unit 43, a signal processing unit 44, a coordinate extraction unit 45, and a detection timing control unit 46.

  The proximity detection signal amplification unit 42 amplifies the proximity detection signal Vdet supplied from the input device 2. The proximity detection signal amplification unit 42 may include a low pass analog filter that removes high frequency components (noise components) included in the proximity detection signal Vdet, extracts components of the proximity detection signal, and outputs the components.

(Basic principle of capacitive proximity detection)
The input device 2 operates based on the basic principle of capacitive proximity detection, and outputs a proximity detection signal Vdet. The basic principle of proximity detection in the input device 2 will be described with reference to FIGS. 1 to 6. FIG. 2 is an explanatory view showing a state in which an external proximity object is not in contact or in proximity, in order to explain the basic principle of the capacitive proximity detection system. FIG. 3 is an explanatory view showing an example of an equivalent circuit in a state where the external proximity object shown in FIG. 2 is not in contact or in proximity. FIG. 4 is an explanatory view showing a state in which an external proximity object is in contact or in proximity, in order to explain the basic principle of the capacitive proximity detection system. FIG. 5 is an explanatory view showing an example of an equivalent circuit in a state where the external proximity object shown in FIG. 4 is in contact or in proximity. FIG. 6 is a diagram illustrating an example of waveforms of the drive signal and the proximity detection signal.

  For example, as illustrated in FIG. 2, the capacitive element C1 includes a pair of electrodes disposed to face each other with the dielectric D interposed therebetween, a drive electrode E1 and a proximity detection electrode E2. As shown in FIG. 3, one end of the capacitive element C1 is connected to an AC signal source (drive signal source) S, and the other end is connected to a voltage detector (proximity detection unit) DET. The voltage detector DET is, for example, an integration circuit included in the proximity detection signal amplification unit 42 shown in FIG.

  When a drive signal pulse Sg which is an alternating current rectangular wave of a predetermined frequency (for example, about several kHz to several hundreds kHz) is applied from an AC signal source S to a drive electrode E1 (one end of a capacitive element C1), a proximity detection electrode E2 (capacitive element An output waveform (proximity detection signal Vdet) appears via the voltage detector DET connected to the other end side of C1.

In the non-proximity state (including the non-contact state) in which an external proximity object (for example, a finger or a stylus pen) is not in proximity (or in contact), as shown in FIG. 2 and FIG. Thus, a current I ₀ flows according to the capacitance value of the capacitive element C1. As shown in FIG. 6, the voltage detector DET converts the fluctuation of the current I ₀ according to the drive signal pulse Sg into a fluctuation of voltage (waveform V _{0 of} solid line).

On the other hand, in the proximity state (including the contact state) in which the external proximity object is in proximity (or in contact), as shown in FIG. 4, the capacitance C2 formed by the external proximity object is in contact with the proximity detection electrode E2. By being in the vicinity, the electrostatic capacitance corresponding to the fringe between the drive electrode E1 and the proximity detection electrode E2 is interrupted, and acts as a capacitive element C1 ′ having a smaller capacitance value than the capacitance value of the capacitive element C1. When seen in the equivalent circuit shown in FIG. 5, the current I ₁ flows through the capacitor C1 '. As shown in FIG. 6, the voltage detector DET converts the fluctuation of the current I ₁ according to the drive signal pulse Sg into a fluctuation of voltage (waveform V _{1 of a} dotted line). In this case, the waveform V ₁ has a smaller amplitude than the waveform V ₀ described above. As a result, the absolute value | ΔV | of the voltage difference between the waveform V ₀ and the waveform V ₁ changes in accordance with the influence of a nearby object such as an external proximity object. Note that the voltage detector DET accurately detects the absolute value | ΔV | of the voltage difference between the waveform V ₀ and the waveform V ₁ , so that switching in the circuit matches the frequency of the drive signal pulse Sg. It is more preferable to perform an operation provided with a period Reset in which charging and discharging are reset.

  The input device 2 shown in FIG. 1 is configured to perform proximity detection by sequentially scanning one detection block in accordance with a drive signal supplied from the first electrode driver 14.

  The input device 2 outputs the proximity detection signal Vdet for each detection block from a plurality of proximity detection electrodes described later via the voltage detector DET shown in FIG. 3 or 5, and the proximity signal amplification of the proximity detection processing unit 40 It is supplied to the section 42. The proximity signal amplification unit 42 amplifies the proximity detection signal Vdet, and then supplies the proximity detection signal Vdet to the A / D conversion unit 43.

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

The signal processing unit 44 includes a digital filter which is included in the output signal of the A / D conversion unit 43 and reduces frequency components (noise components) other than the frequency at which the drive signal is sampled. The signal processing unit 44 is a logic circuit that detects the presence or absence of a touch on the input device 2 based on the output signal of the A / D conversion unit 43. The signal processing unit 44 performs a process of extracting only the voltage difference due to the external proximity object. The signal of the voltage difference due to this external proximity object is the absolute value | ΔV | of the difference between the waveform V ₀ and the waveform V ₁ described above. The signal processing unit 44 may calculate the average of the absolute values | ΔV | by averaging the absolute values | ΔV | per detection block. Thereby, the signal processing unit 44 can reduce the influence of noise. The signal processing unit 44 compares the signal of the voltage difference due to the detected external proximity object with a predetermined threshold voltage, and if the voltage difference is greater than this threshold voltage, the external proximity object is in the proximity state I will judge. On the other hand, the signal processing unit 44 compares the detected digital voltage with a predetermined threshold voltage, and determines that the external proximity object is not in proximity if the voltage difference is less than the threshold voltage. Thus, the proximity detection processing unit 40 can perform proximity detection.

  The coordinate extraction unit 45 is a logic circuit that obtains the coordinate position at which the proximity state has occurred in the plane of the detection area when the signal processing unit 44 detects the proximity state. The detection timing control unit 46 controls the A / D conversion unit 43, the signal processing unit 44, and the coordinate extraction unit 45 to operate in synchronization with each other. The coordinate extraction unit 45 outputs the coordinates of the close object as an output signal Vout.

  FIG. 7 is a perspective view illustrating an example of a drive electrode and a proximity detection electrode of the input device according to the first embodiment. The input device 2 includes a first electrode portion 31, a second electrode portion 32, and a third electrode portion 33 insulated from the first electrode portion 31 and the second electrode portion 32. The first electrode portion 31 acts as drive electrodes Tx1, Tx2, Tx3... Txn on the transmission side to which the drive signal pulse Sg is applied (hereinafter also referred to as drive electrode Tx) in a predetermined extending direction of the conductor pattern It has a plurality of extending stripe-like electrode patterns.

  The second electrode portion 32 acts as drive electrodes Tz1, Tz2, Tz3... Tzn (hereinafter also referred to as drive electrodes Tz) on the transmission side to which the drive signal pulse Sg is applied, in a predetermined extending direction of the conductor pattern. It has a plurality of extending stripe-like electrode patterns. The drive electrode Tz has a one-to-one correspondence with the opposing drive electrode Tx, and the same drive signal pulse Sg is synchronously applied to the drive electrode Tz opposing the drive electrode Tx to which the drive signal pulse Sg is applied. It is done.

  The third electrode portion 33 intersects with the extending direction of the first electrode portion 31 as proximity detection electrodes Rx1, Rx2, Rx3 ... Rxm (hereinafter also referred to as proximity detection electrodes Rx) which output the proximity detection signal Vdet. It has a plurality of stripe-shaped electrode patterns extending in the direction. Each electrode pattern of the proximity detection electrode Rx is connected to an input of the proximity detection signal amplification unit 42 of the proximity detection processing unit 40.

  As shown in FIG. 7, in the input device 2 according to the first embodiment, the proximity detection electrode Rx faces the drive electrode Tx. The proximity detection electrode Rx may not be opposed to the drive electrode Tx, and may be formed in the same layer as the drive electrode Tx. Further, the proximity detection electrode Rx or the drive electrode Tx is not limited to the shape of being divided into a plurality of stripes. For example, the proximity detection electrode Rx or the drive electrode Tx may have a comb shape. Alternatively, the proximity detection electrode Rx or the first electrode portion 31 (drive electrode block) may be divided into a plurality of pieces, and the shape of the slits for dividing the first electrode portion 31 may be linear or curved. Good.

  The drive electrodes E1 shown in FIG. 2 correspond to the drive electrodes Tx shown in FIG. 7, and the proximity detection electrodes E2 shown in FIG. 2 correspond to the proximity detection electrodes Rx. Therefore, at the intersection where the drive electrode Tx and the proximity detection electrode Rx shown in FIG. 7 intersect with each other in plan view, a capacitance corresponding to the capacitance value of the capacitive element C1 shown in FIG. 2 is generated.

  Next, the structure of the display device 1 with proximity detection function will be described. FIG. 8 is a cross-sectional view schematically showing the structure of the display device with a proximity detection function in the first embodiment. In the first embodiment, the display unit 9 is a reflective image display panel. The display unit 9 may be a semi-transmissive image display panel, as long as it is a display device that reflects an incident light incident from the viewer 200 side and displays an image. As shown in FIG. 8, the display unit 9 includes an array substrate 91 and an opposing substrate 92 facing each other. Between the array substrate 91 and the counter substrate 92, a liquid crystal layer 93 in which a liquid crystal element is sealed is provided.

  The array substrate 91 is a translucent substrate having transparency, such as glass. The array substrate 91 has a plurality of pixel electrodes 94 on the surface of the insulating layer 98 on the liquid crystal layer 93 side. The pixel electrode 94 is connected to the signal line via the switching element 99. The pixel signal Vpix described above is applied to the pixel electrode 94. The pixel electrode 94 is formed of, for example, a material having a metallic luster such as aluminum or silver, and has light reflectivity. Therefore, the pixel electrode 94 reflects external light or light from the input device 2.

  The opposing substrate 92 is, for example, a translucent substrate having transparency such as glass. The counter substrate 92 has a counter electrode 95 and a color filter 96 on the surface on the liquid crystal layer 93 side. More specifically, the counter electrode 95 is provided on the surface of the color filter 96 on the liquid crystal layer 93 side.

  The counter electrode 95 is formed of, for example, a translucent conductive material having transparency such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide). A common potential common to the pixels is given to the counter electrode 95. Since the pixel electrode 94 and the counter electrode 95 are provided to face each other, when a voltage by an image output signal is applied between the pixel electrode 94 and the counter electrode 95, the pixel electrode 94 and the counter electrode 95 An electric field is generated in the liquid crystal layer 93. The electric field generated in the liquid crystal layer 93 twists the liquid crystal element to change the birefringence, and the amount of light from the display unit 9 is adjusted for each sub-pixel 97. The display unit 9 is a so-called vertical electric field system, but may be a horizontal electric field system in which an electric field is generated in a direction parallel to the display surface.

  The color filter 96 of any one of the first color (for example red R), the second color (for example green G) and the third color (for example blue B) corresponds to the pixel electrode 94 for each sub-pixel 97. Provided. Thus, the pixel electrode 94, the counter electrode 95, and the color filter 96 of each color respectively constitute a sub-pixel 97.

  The input device 2 can emit light toward the LF1 direction on the display unit 9 side. An input device 2 is provided on the surface of the opposite substrate 92 opposite to the liquid crystal layer 93. The display unit 9 reflects light incident in the LF1 direction in the LF2 direction as a front light as described later, and displays an image. For example, the pixel electrode 94 reflects light incident in the LF1 direction from the surface on the viewer 200 side (the surface on which the image is displayed) in the LF2 direction. Further, the input device 2 and the counter substrate 92 are joined by an optical adhesive layer 8. It is desirable that the optical adhesive layer 8 be made of a material having a light scattering function. In the optical adhesive layer 8, the light irradiated from the input device 2 in the direction of the LF 1 is scattered. Thereby, the light from the input device 2 is easily irradiated to the pixel electrode 94 uniformly. In addition, a polarizing plate can be further formed at the position of the optical bonding layer 8.

  FIG. 9 is a cross-sectional view schematically showing the structure of the input device according to the first embodiment. FIG. 10 is a cross-sectional view schematically showing the structure of the input device according to the first embodiment. FIG. 11 is an explanatory diagram for explaining the positional relationship in plan view of the first electrode unit, the second electrode unit, and the third electrode unit of the input device according to the first embodiment. The cross section shown in FIG. 9 is a B-B cross section of FIG. 11, and the cross section shown in FIG. 10 is an A-A cross section of FIG. As shown in FIGS. 9 and 10, the input device 2 includes the first substrate 21, the first electrode portion 31, the second electrode portion 32, the light emitting layer 22, the third electrode portion 33, and the first light shielding. And a unit 24. The second electrode portion 32 is covered with an insulating protective layer 23. The insulating protective layer 23 may not be formed. The first substrate 21 is a translucent substrate such as glass provided with the first surface 201 and the second surface 202. In the input device 2, the first surface 201 in FIGS. 9 and 10 is on the viewer 200 side shown in FIG. 8, and the second surface 202 is on the display unit 9 side.

  The first electrode portion 31 is a conductive first conductive layer formed in one layer on the second surface 202 side of the first substrate 21. The plurality of first conductive layers have a shape extending continuously in one direction in plan view, and are in contact with the light emitting layer 22 along the shape of the first conductive layer. The first conductive layer of the first electrode portion 31 is formed of, for example, a transparent conductive material having conductivity or a conductive metal material such as ITO or IZO. The material of the first conductive layer of the first electrode portion 31 is formed of a metallic material having metallic gloss, such as aluminum (Al), silver (Ag), chromium (Cr), and an alloy containing them. The light emission of the light emitting layer 22 can be reflected.

  The first light shielding portion 24 is disposed between the first substrate 21 and the first electrode portion 31. The first light shielding portion 24 is formed along the shape of the first conductive layer of the first electrode portion 31. The first light shielding portion 24 has a larger area than the first conductive layer of the first electrode portion 31. When viewed in a direction perpendicular to the first surface 201 of the first substrate 21, the first light shielding portion 24 can cover the entire first conductive layer of the first electrode portion 31.

  The first light-shielding portion 24 may be made of any material as long as it has a light-shielding property. As a material of the first light shielding portion 24, a metal material having metallic luster, such as aluminum (Al), silver (Ag), chromium (Cr), and an alloy including them can reflect light emitted from the light emitting layer 22. ,preferable. Accordingly, the first light emitting element portion DEL includes the first light shielding portion 24 closer to the first surface 201 of the first substrate 21 than the light emitting layer 22, so that light leaks to the first surface 201 side of the first substrate 21. Can be suppressed.

  The light emitting layer 22 has a size overlapping with one of the first conductive layers in plan view. The light emitting layer 22 is formed between the first electrode portion 31 and the second electrode portion 32 as shown in FIGS. 9 and 10. Thus, the light emitting layer 22 is in electrical contact with the first conductive layer of the first electrode portion 31. The light emitting layer 22 is an organic light emitting layer, includes an organic material, and includes a hole injection layer, a hole transport layer, an organic layer, an electron transport layer, and an electron injection layer (not shown).

  The second electrode portion 32 is a conductive second conductive layer formed in a layer different from the first electrode portion 31. The second conductive layer has a size overlapping with one of the first conductive layers in plan view. The second conductive layer of the second electrode portion 32 is in electrical contact with the entire surface of the light emitting layer 22. The material of the second conductive layer of the second electrode portion 32 is formed of, for example, a transparent conductive material having transparency, such as ITO or IZO.

  The first light emitting element portion DEL has a first electrode portion 31, a light emitting layer 22, and a second electrode portion 32, and applies a voltage in the forward bias direction to the first electrode portion 31 and the second electrode portion 32. Thus, the light emitting layer 22 emits light. When voltage is applied to the first light emitting element portion DEL, the light emitting layer 22 can emit light along the shape of the first conductive layer of the first electrode portion 31. As a result, a light emission band extending continuously in one direction in a plan view is generated, and the input device 2 functions as a front light capable of emitting light to the display unit 9 shown in FIG.

  For example, when the first electrode portion 31 is a cathode and the second electrode portion 32 is an anode, the first conductive layer of the first electrode portion 31 is formed of only a metal such as aluminum (Al) or silver (Ag), The second conductive layer of the second electrode portion 32 may be formed of ITO. When the first electrode portion 31 is an anode, aluminum (Al) may be formed as a first conductive layer of the first electrode portion 31 and then ITO may be sputtered on the aluminum (Al). When the 2nd electrode part 32 is a cathode, the 2nd conductive layer of the 2nd electrode part 32 may be formed with IZO.

  The third electrode portion 33 is formed on the first surface 201 side of the first substrate 21 and is insulated from the first conductive layer of the first electrode portion 31. The third electrode portion 33 is a layer different from the first conductive layer of the first electrode portion 31 and has a plurality of third conductive layers formed in one layer. The first surface 201 on which the third electrode unit 33 is formed is a reference plane (coordinate input reference plane) serving as a reference of input coordinates of the proximity object.

  As described above, the first electrode unit 31 and the second electrode unit 32 are the drive electrode Tx on the transmission side to which the drive signal pulse Sg is applied, and the third electrode unit 33 is the proximity detection electrode Rx described above ( See Figure 7). Therefore, when the input device 2 performs the proximity detection operation, the third electrode unit 33 changes according to the coordinates of the proximity object at a position overlapping with the first surface 201 of the first substrate 21 in plan view. The change of the electric field between 31 and 31 can be output to the proximity detection processing unit 40 (see FIG. 1).

First, as a method of manufacturing the input device 2, the first substrate 21 is prepared, and the first light shielding portion 24 is patterned on the second surface 202 of the first substrate 21. The gap between the adjacent first light shields 24 is planarized by the insulating layer 23a. Next, the first conductive layer of the first electrode portion 31 is patterned in the first light shielding portion 24. The gap between the adjacent first conductive layers of the first electrode portion 31 is planarized by the insulating layer 23 b. Next, as a method of manufacturing the input device 2, the second conductive layer adjacent to the light emitting layer 22 and the second electrode portion 32 is formed on the first conductive layer of the first electrode portion 31 and the insulating layer 23 b. The gap between the adjacent light emitting layer 22 and the adjacent second conductive layer of the adjacent second electrode portion 32 is planarized by the insulating layer 23 c. Next, in the input device 2, the insulating layer 23d is formed of an insulator. Thus, the protective layer 23 is formed of the insulating layer 23a, the insulating layer 23b, the insulating layer 23c, and the insulating layer 23d. The insulating layer 23a, the insulating layer 23b, the insulating layer 23c, and the insulating layer 23d are, for example, light transmitting insulators, for example, light transmitting insulators such as alumina (Al ₂ O ₃ ). The insulating layer 23a, the insulating layer 23b, the insulating layer 23c, and the insulating layer 23d may be formed of different materials as long as they are insulators. Next, in the input device 2, the third electrode portion 33 is formed on the first surface 201 of the first substrate 21. As described above, in the input device 2 according to the first embodiment, the number of steps of the etching process is small, and the manufacturing cost can be reduced.

(Modification 1 of Embodiment 1)
Next, the input device 2 according to the first modification of the first embodiment will be described. FIG. 12 is an explanatory view for explaining the positional relationship in plan view of the first electrode portion, the second electrode portion, and the third electrode portion of the input device according to the first modification of the first embodiment. In addition, the same code | symbol is attached | subjected to the same component as what was demonstrated in Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 12, unlike the input device 2 according to the first embodiment, the input device 2 according to the first modification of the first embodiment does not include the first light shield 24.

(Modification 2 of Embodiment 1)
Next, the input device 2 according to the second modification of the first embodiment will be described. FIG. 13 is a cross-sectional view schematically illustrating the structure of the input device according to the second modification of the first embodiment. The cross section shown in FIG. 13 is an AA cross section shown in FIG. In the input device according to the second modification of the first embodiment shown in FIG. 13, the positional relationship between the first electrode portion, the second electrode portion and the third electrode portion in plan view is the same as the positional relationship in plan view in FIG. is there. In addition, the same code | symbol is attached | subjected to the same component as what was demonstrated in Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

  The input device 2 according to the second modification of the first embodiment includes the first substrate 21, the insulating layer 25, the first electrode portion 31, the second electrode portion 32, the light emitting layer 22, and the third electrode portion 33. , And the first light shielding portion 24. The third electrode portion 33 according to the second modification of the first embodiment is formed on the second surface 202 side of the first substrate 21 and is insulated from the first conductive layer of the first electrode portion 31 via the insulating layer 25. There is. The first surface 201 of the first substrate 21 opposite to the second surface 202 on which the third electrode portion 33 is formed is a reference plane (coordinate input reference surface) which is a reference of input coordinates of the proximity object. As shown in FIG. 13, the first electrode portion 31, the second electrode portion 32 and the third electrode portion 33 are on the second surface side of the first substrate 21.

  As described above, the first electrode unit 31 and the second electrode unit 32 are the drive electrode Tx on the transmission side to which the drive signal pulse Sg is applied, and the third electrode unit 33 is the proximity detection electrode Rx described above ( See Figure 7). Therefore, when the input device 2 performs the proximity detection operation, the third electrode unit 33 changes according to the coordinates of the proximity object at a position overlapping with the first surface 201 of the first substrate 21 in plan view. The change of the electric field between 31 and 31 can be output to the proximity detection processing unit 40 (see FIG. 1).

(Modification 3 of Embodiment 1)
Next, the input device 2 according to the third modification of the first embodiment will be described. FIG. 14 is a cross-sectional view schematically illustrating the structure of the input device according to the third modification of the first embodiment. In the input device according to the third modification of the first embodiment shown in FIG. 14, the positional relationship between the first electrode portion, the second electrode portion, and the third electrode portion in plan view is the same as the positional relationship in plan view in FIG. is there. The same components as those described in the first embodiment and the first modification of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

  The input device 2 includes a cover substrate 26, an insulating layer 25, a first substrate 21, a first electrode portion 31, a second electrode portion 32, a light emitting layer 22, a third electrode portion 33, and a first light shielding. And a unit 24. The cover substrate 26 is a translucent substrate such as glass. The third electrode portion 33 according to the third modification of the first embodiment is formed on the surface of the cover substrate 26 facing the first substrate 21 and is on the first surface 201 side of the first substrate 21. The cover substrate 26 and the first substrate 21 are stacked via the insulating layer 25 and insulated. In the third modification of the first embodiment, the first surface 201 of the first substrate 21 is a reference plane (coordinate input reference surface) which is a reference of input coordinates of a proximity object. The surface opposite to the surface of the cover substrate 26 having the third electrode portion 33 is a surface substantially parallel to the first surface 201 of the first substrate 21.

  As described above, the first electrode unit 31 is the drive electrode Tx on the transmission side to which the drive signal pulse Sg is applied, and the third electrode unit 33 is the above-described proximity detection electrode Rx (see FIG. 7). Therefore, when the input device 2 performs the proximity detection operation, the third electrode unit 33 changes according to the coordinates of the proximity object at a position overlapping with the first surface 201 of the first substrate 21 in plan view. The change of the electric field between 31 and 31 can be output to the proximity detection processing unit 40 (see FIG. 1).

  As described above, the first electrode unit 31 and the second electrode unit 32 according to the first embodiment and the modifications of the first embodiment function as an electrode of the first light emitting element unit DEL and drive the input device 2. It also functions as an electrode Tx. For this reason, the input device 2 becomes thin.

(Drive control)
The drive control of the input device 2 according to the first embodiment and each modification of the embodiment will be described with reference to FIGS. 1, 7, and 15 to 19. When performing the proximity detection operation, the input device 2 drives the first electrode driver 14 shown in FIG. 1 to line-sequentially scan the drive electrodes Tx and the drive electrodes Tz shown in FIG. 7 in a time-division manner. Thereby, the drive electrodes Tx of the first electrode unit 31 are sequentially selected in the scan direction Scan. Then, the input device 2 outputs the proximity detection signal Vdet from the proximity detection electrode Rx. Note that the input device 2 may be driven so that the first electrode driver 14 performs line-sequential scanning in a time-division manner as a single detection block by grouping a plurality of drive electrodes Tx shown in FIG. 7.

  Here, since the first electrode unit 31 functions as an electrode of the first light emitting element unit DEL and also functions as a drive electrode Tx of the input device 2, even when the first light emitting element unit DEL does not need to emit light. When the drive signal pulse Sg is applied to the drive electrode Tx of the first electrode portion 31, the first light emitting element portion DEL may emit light. Therefore, in the input device 2 according to the first embodiment and each modification of the first embodiment, even when the drive signal pulse Sg is applied to the drive electrode Tx of the first electrode unit 31, the light emission of the unintended first light emitting element unit DEL Provide a driving method for suppressing

  FIG. 15 is an explanatory diagram for describing a first drive electrode driver and a second drive electrode driver according to the first embodiment. The first electrode driver 14 includes a first electrode control unit 141 and a Tx buffer 16. The first electrode control unit 141 generates the drive signal Vtx based on the control signal supplied from the control unit 11 and supplies the drive signal Vtx to the Tx buffer 16. The Tx buffer 16 supplies the amplified drive signal pulse Sg to the drive electrode Txn (part of the first electrode portion 31) sequentially selected in the scan direction Scan based on the drive signal Vtx.

  The second electrode driver 15 includes a second electrode control unit 151 and a voltage control circuit 17. The second electrode control unit 151 supplies a control signal ELbev for supplying power of a constant voltage to the voltage control circuit 17. The voltage control circuit 17 controls the voltage supplied to the second electrode unit 32 of the input device 2 based on the control signal supplied from the control unit 11. The voltage control circuit 17 applies the amplified drive signal pulse Sg to the drive electrode Tzn (part of the second electrode portion 32) sequentially selected in the scan direction Scan in the same manner as the Tx buffer 16 based on the drive signal Vtx. Supply.

  FIG. 16 is an explanatory diagram for illustrating voltages of the first electrode portion and the second electrode portion in the drive electrode selection period in the state where the first light emitting element is not lit. FIG. 17 is an explanatory diagram for illustrating voltages of the first electrode portion and the second electrode portion in the drive electrode selection period when the first light emitting element is in the lighted state. In FIGS. 16 and 17, the first electrode portion 31 is a cathode of the first light emitting element portion DEL, and the second electrode portion 32 is an anode of the first light emitting element portion DEL.

  The voltage control circuit 17 causes the voltage Va of the second electrode portion 32 to be close to the voltage Vk of the first electrode portion 31 in order to bring the first light emitting element portion DEL into the non-lighting state, thereby making the first electrode The voltage between the voltage Vk of the portion 31 and the voltage Va of the second electrode portion 32 does not reach the light emission drive voltage in the forward direction. In this state, as shown in FIG. 16, the first electrode driver 14 applies a drive signal pulse Sg to the first electrode portion 31. The second electrode driver 15 applies the drive signal pulse Sg to a portion of the second electrode portion 32 overlapping in plan view with a portion of the first electrode portion 31 to which the first electrode driver 14 applies the drive signal pulse Sg. . The rising directions of the pulses of the drive signal pulse Sg applied by the first electrode driver 14 and the second electrode driver 15 are the same. Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 is a light emission drive voltage at which the first light emitting element portion DEL is lit. The light emission of the first light emitting element portion DEL is suppressed without exceeding ΔVFL. As a result, the first electrode driver 14 and the second electrode driver 15 drive the drive electrode Tx and the drive electrode Tz to line-sequentially scan the drive electrode Tx and the drive electrode Tz in a time-division manner, and the first light emitting element The light emission of the part DEL is suppressed.

  The voltage control circuit 17 sets the difference between the voltage Vk of the second electrode portion 32 and the voltage Vk of the first electrode portion 31 to the light emission drive voltage in the forward bias direction so that the first light emitting element portion DEL is turned on. Control is performed so as to approach ΔVFL, and as shown in FIG. 17, a voltage in the forward bias direction greater than the light emission drive voltage ΔVFL is applied between the first electrode portion 31 and the second electrode portion 32.

  As shown in FIG. 17, the first electrode driver 14 applies a drive signal pulse Sg to the first electrode portion 31. The second electrode driver 15 applies the drive signal pulse Sg to a portion of the second electrode portion 32 overlapping in plan view with a portion of the first electrode portion 31 to which the first electrode driver 14 applies the drive signal pulse Sg. . Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 becomes equal to or higher than the light emission drive voltage ΔVFL. Then, even when the drive signal pulse Sg is applied, the light emission of the first light emitting element unit DEL continues. The lighting amount of the first light emitting element portion DEL changes in accordance with the voltage Va of the second electrode portion 32 controlled by the voltage control circuit 17 based on the command of the control portion 11.

  The first electrode unit 31 may be an anode of the first light emitting element unit DEL, and the second electrode unit 32 may be a cathode of the first light emitting element unit DEL. FIG. 18 is an explanatory view for explaining voltages of the first electrode portion and the second electrode portion in the drive electrode selection period in the state where the first light emitting element is not lit. FIG. 19 is an explanatory view for explaining voltages of the first electrode portion and the second electrode portion in the drive electrode selection period in the state where the first light emitting element is lit. In FIGS. 18 and 19, the first electrode portion 31 is an anode of the first light emitting element portion DEL, and the second electrode portion 32 is a cathode of the first light emitting element portion DEL.

  The voltage control circuit 17 causes the voltage Vk of the second electrode portion 32 to be close to the voltage Va of the first electrode portion 31 in order to bring the first light emitting element portion DEL into the non-lighting state, thereby making the first electrode The voltage between the voltage Va of the portion 31 and the voltage Vk of the second electrode portion 32 does not reach the light emission drive voltage in the forward direction. In this state, as shown in FIG. 18, the first electrode driver 14 applies a drive signal pulse Sg between the first electrode portion 31 and the second electrode portion 32. The second electrode driver 15 applies the drive signal pulse Sg to a portion of the second electrode portion 32 overlapping in plan view with a portion of the first electrode portion 31 to which the first electrode driver 14 applies the drive signal pulse Sg. . Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 is a light emission drive voltage at which the first light emitting element portion DEL is lit. The light emission of the first light emitting element portion DEL is suppressed without exceeding ΔVFL. As a result, the first electrode driver 14 and the second electrode driver 15 drive the drive electrode Tx and the drive electrode Tz to line-sequentially scan the drive electrode Tx and the drive electrode Tz in a time-division manner, and the first light emitting element can be driven by any drive signal pulse Sg. The light emission of the part DEL is suppressed.

  The voltage control circuit 17 sets the difference between the voltage Va of the first electrode portion 31 and the voltage Vk of the second electrode portion 32 to the light emission drive voltage in the forward bias direction so that the first light emitting element portion DEL is turned on. Control is performed so as to approach ΔVFL, and as shown in FIG. 19, a voltage in the forward bias direction greater than the light emission drive voltage ΔVFL is applied between the first electrode portion 31 and the second electrode portion 32.

  As shown in FIG. 19, the first electrode driver 14 applies a drive signal pulse Sg to the first electrode portion 31. The second electrode driver 15 applies the drive signal pulse Sg to a portion of the second electrode portion 32 overlapping in plan view with a portion of the first electrode portion 31 to which the first electrode driver 14 applies the drive signal pulse Sg. . Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 becomes equal to or higher than the light emission drive voltage ΔVFL. Then, even if the drive signal pulse Sg is applied, the light emission of the first light emitting element unit DEL continues. The lighting amount of the first light emitting element portion DEL changes in accordance with the voltage Vk of the second electrode portion 32 controlled by the voltage control circuit 17 based on the command of the control portion 11.

  As described above, the input device 2 according to the first embodiment and each modification of the first embodiment includes the plurality of first conductive layers in which the first electrode portion 31 is formed in one layer, and the second electrode portion A plurality of second conductive layers 32 have a size overlapping with one first conductive layer of the first electrode portion 31 in plan view. A drive signal pulse Sg is applied to the first conductive layer of the first electrode portion 31 and the second conductive layer of the second electrode portion 32 which overlap in a plan view, in the same direction.

  Specifically, the input device 2 according to the first embodiment and each modification of the first embodiment supplies a voltage to the first electrode driver 14 that supplies a voltage to the first electrode unit 31 and a voltage to the second electrode unit 32. The change of the electric field between the first electrode portion and the third electrode portion 33, which changes according to the coordinates of the proximity object at a position overlapping the second electrode driver 15 and the first surface 201 of the first substrate 21 in plan view And a proximity detection processing unit 40 for detecting a detection signal Vdet in response to the drive signal pulse Sg. Then, as described above, the first electrode driver 14 and the second electrode driver 15 time-divide portions of the first electrode portion 31 and the second electrode portion 32 overlapping in a plan view as the drive electrode Tx and the drive electrode Tz. It scans and supplies drive signal pulse Sg.

  When the input device 2 according to the first embodiment and each modification of the first embodiment does not function as a front light, the second electrode driver 15 is in the forward bias direction between the first electrode portion 31 and the second electrode portion 32. The light emission drive voltage ΔVFL is not applied. In this case, even when the drive signal pulse Sg is applied to the first electrode portion 31 and the second electrode portion 32, the light emission of the first light emitting element portion DEL is suppressed in the input device 2.

  When the input device 2 according to the first embodiment and each modified example of the first embodiment functions as a front light, the second electrode driver 15 is in the forward bias direction between the first electrode portion 31 and the second electrode portion 32. When the applied voltage is applied and the light emission drive voltage ΔVFL is applied, the first light emitting element portion DEL emits light. The second electrode driver 15 controls the light emission amount of the first light emitting element unit DEL by controlling a voltage value of the light emission drive voltage ΔVFL or more. In this case, even when the drive signal pulse Sg is applied to the first electrode unit 31 and the second electrode unit 32, the input device 2 continues the light emission of the first light emitting element unit DEL.

Second Embodiment
Next, drive control of the input device 2 according to the second embodiment will be described with reference to FIGS. 1, 6, 7, 20, and 21. The input device 2 according to the second embodiment will be described by exemplifying the input device 2 of the first embodiment, but can be applied to any of the input devices described in the respective modifications of the first embodiment described above. FIG. 20 is an explanatory diagram for explaining a first drive electrode driver and a second drive electrode driver according to the second embodiment. The first electrode portion 31 is a cathode of the first light emitting element portion DEL, and the second electrode portion 32 is an anode of the first light emitting element portion DEL. In addition, the same code | symbol is attached | subjected to the same component as what was demonstrated by Embodiment 1 mentioned above and each modification of Embodiment 1, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 20, the first electrode driver 14 according to the second embodiment includes a first electrode control unit 141, a Tx timing synthesis circuit 19, and a Tx buffer 16. The first electrode control unit 141 generates the drive signal Vtx based on the control signal supplied from the control unit 11 and supplies the drive signal Vtx to the Tx timing synthesis circuit 19 and the EL lighting timing generation circuit 18. The control unit 11 provides the EL lighting timing generation circuit 18 with a display synchronization signal Vp for lighting the display unit 9 and a lighting amount signal Vg. The display synchronization signal Vp is a request signal for causing the first light emitting element unit DEL to emit light in synchronization with the rewriting of the display, and the EL lighting timing generation circuit 18 responds to the lighting amount signal Vg based on the display synchronization signal Vp. The pulse signal ELreq of the lighting period is generated. The EL lighting timing generation circuit 18 sets, for example, the lighting period to the high level (H) and the non-lighting period to the low level (L) to the Tx timing synthesis circuit 19, and the pulse width according to the lighting amount of the first light emitting element unit DEL. The pulse signal ELreq of the lighting period is generated and supplied. When the drive signal Vtx is supplied to the EL lighting timing generation circuit 18, the pulse of the driving signal Vtx is superimposed on the pulse signal ELreq in the lighting period.

  The second electrode driver 15 includes a second electrode control unit 151 and a voltage control circuit 17. The second electrode control unit 151 supplies power of a constant voltage to the voltage control circuit 17. The voltage control circuit 17 controls the voltage supplied to the second electrode unit 32 of the input device 2 based on the control signal supplied from the control unit 11.

  The voltage control circuit 17 according to the second embodiment causes the voltage Va of the second electrode portion 32 to be closer to the voltage Vk of the first electrode portion 31 in order to put the first light emitting element portion DEL into the non-lighting state. In advance (see FIG. 16), the voltage is maintained as it is even when the first light emitting element portion DEL is in the lighting state.

  FIG. 21 is a timing chart of drive control according to the second embodiment. As shown in FIG. 21, in the first period H1, the drive signal Vtx transmitted by the first electrode control unit 141 and the pulse signal ELreq in the lighting period do not overlap. In the first period H1, the first electrode driver 14 applies a drive signal pulse Sg to a part of the first conductive layer (drive electrode Txn) of the first electrode portion 31 according to the drive signal Vtx. The second electrode driver 15 applies a drive signal pulse Sg to the second conductive layer (drive electrode Tzn) of the second electrode unit 32 overlapping the drive electrode Txn in plan view according to the drive signal Vtx. Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 is a light emission drive voltage at which the first light emitting element portion DEL is lit. The light emission of the first light emitting element portion DEL is suppressed without exceeding ΔVFL. As a result, the first electrode driver 14 and the second electrode driver 15 drive the drive electrode Tx and the drive electrode Tz to line-sequentially scan the drive electrode Tx and the drive electrode Tz in a time-division manner, and the first light emitting element can be driven by any drive signal pulse Sg. The light emission of the part DEL is suppressed.

  In the first period H1, the lighting pulse Sel is supplied to the drive electrode Tzn (a part of the first electrode portion 31) of the input device 2 based on the pulse signal ELreq in the lighting period. A voltage difference is generated between the first electrode portion 31 and the second electrode portion 32 due to the lighting pulse Sel. When this voltage difference becomes the light emission drive voltage ΔVFL in the forward bias direction, the first light emitting element portion DEL emits light. The lighting pulse Sel may be composed of a plurality of pulses, and the light emission amount of the first light emitting element portion DEL may be controlled by pulse width modulation.

  As described above, when the display synchronization signal Vp is supplied to the EL lighting timing generation circuit 18, the pulse signal ELreq for the lighting period is generated. Therefore, when the drive signal Vtx and the request signal (display synchronization signal Vp) of the lighting pulse Sel overlap, the rise of the drive signal Vtx transmitted by the first electrode control unit 141 in the second period H2 shown in FIG. The rising edge of the pulse signal ELreq in the lighting period overlaps. In the second period H2, the lighting pulse Sel on which the driving signal pulse Sg is superimposed is a part of the second conductive layer of the second electrode portion 32 based on a signal on which the driving signal Vtx is superimposed on the pulse signal ELreq in the lighting period. (Drive electrode Tzn) is applied. That is, even if the drive signal pulse Sg is superimposed, the light emission drive voltage ΔVFL in the forward bias direction is applied between the first electrode portion 31 and the second electrode portion 32 by the lighting pulse Sel, and the first light emitting element portion DEL emits light.

  In the second period H2, the first electrode driver 14 applies a drive signal pulse Sg to a part of the first conductive layer (drive electrode Txn) of the first electrode portion 31 according to the drive signal Vtx. The second electrode driver 15 applies a drive signal pulse Sg to the second conductive layer (drive electrode Tzn) of the second electrode unit 32 overlapping the drive electrode Txn in plan view according to the drive signal Vtx. Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, if the potential difference between the first electrode portion 31 and the second electrode portion 32 becomes the light emission drive voltage ΔVFL, the first light emitting element portion DEL can emit light.

  As shown in FIG. 21, in the third period H3, the drive signal Vtx transmitted by the first electrode control unit 141 and the pulse signal ELreq in the lighting period overlap. In the third period H3, the drive selection period Htx and the required lighting period overlap. In the third period H3, the lighting pulse Sel on which the driving signal pulse Sg is superimposed is a second conductive layer of a part of the second electrode portion 32 based on a signal on which the driving signal Vtx is superimposed on the pulse signal ELreq in the lighting period. (Drive electrode Tzn) is applied. Even when the drive signal pulse Sg is superimposed, the light emission drive voltage ΔVFL in the forward bias direction is applied between the first electrode portion 31 and the second electrode portion 32 by the lighting pulse Sel, and the first light emitting element portion DEL It emits light.

  In the third period H3, the first electrode driver 14 applies a drive signal pulse Sg to a portion of the first conductive layer (drive electrode Txn) of the first electrode portion 31 in accordance with the drive signal Vtx. The second electrode driver 15 applies a drive signal pulse Sg to the second conductive layer (drive electrode Tzn) of the second electrode unit 32 overlapping the drive electrode Txn in plan view according to the drive signal Vtx. Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, if the potential difference between the first electrode portion 31 and the second electrode portion 32 becomes the light emission drive voltage ΔVFL, the first light emitting element portion DEL can emit light.

  As shown in FIG. 21, in the fourth period H4, the rise of the drive signal Vtx sent by the first electrode control unit 141 and the fall of the pulse signal ELreq in the lighting period overlap. Even if the pulse signal ELreq in the lighting period is superimposed on the driving signal Vtx, the pulse signal ELreq in the lighting period and the driving signal Vtx do not overlap. When the lighting pulse Sel amplified and generated from the pulse signal ELreq in the lighting period is applied to a part of the second conductive layer (driving electrode Tzn) of the second electrode part 32 of the input device 2, the first light emitting element part DEL It emits light. That is, the light emission drive voltage ΔVFL in the forward bias direction is applied between the first electrode portion 31 and the second electrode portion 32 by the lighting pulse Sel, and the first light emitting element portion DEL emits light.

  In the fourth period H4, the first electrode driver 14 applies the drive signal pulse Sg to a part of the first conductive layer (drive electrode Txn) of the first electrode portion 31 according to the drive signal Vtx. The second electrode driver 15 applies a drive signal pulse Sg to the second conductive layer (drive electrode Tzn) of the second electrode unit 32 overlapping the drive electrode Txn in plan view according to the drive signal Vtx. Thus, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 is a light emission drive voltage at which the first light emitting element portion DEL is lit. It becomes smaller than ΔVFL, and the light emission of the first light emitting element portion DEL is suppressed.

(Modification of Embodiment 2)
Next, drive control of the input device 2 according to the modification of the second embodiment will be described with reference to FIGS. 1, 6, 7, and 20 to 22. The input device 2 according to the second modification of the second embodiment is described by exemplifying the input device 2 according to the first embodiment, but is applied to any of the input devices described in each of the modifications of the first embodiment described above. be able to. FIG. 22 is a timing chart of drive control according to a modification of the second embodiment. The same components as those described in the first embodiment, the second embodiment, and the respective modifications of the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 22, if the same driving as in the first period H1 described in the second embodiment is performed, lighting drive in the first period H1 and proximity detection driving can be compatible, so a modification of the second embodiment can be made. The details of the drive control in the first period H1 of the input device 2 according to the example will be omitted.

  In the second period H2, the EL lighting timing generation circuit 18 delays the pulse signal ELreq in the lighting period by a period not overlapping the driving signal Vtx (for example, a period twice the driving selection period Htx). After replacing the ELon, the voltage control circuit 17 is supplied. The voltage control circuit 17 supplies the amplified drive signal pulse Sg to the drive electrode Tzn (part of the second electrode unit 32) sequentially selected in the scan direction Scan based on the drive signal Vtx. Thereafter, the voltage control circuit 17 generates the lighting pulse Sel based on the pulse signal ELon during the lighting period. When the voltage control circuit 17 applies the lighting pulse Sel to the second conductive layer (drive electrode Tzn) of a part of the second electrode portion 32 of the input device 2, the first light emitting element portion DEL emits light. That is, the light emission drive voltage ΔVFL in the forward bias direction is applied between the first electrode portion 31 and the second electrode portion 32 by the lighting pulse Sel, and the first light emitting element portion DEL emits light.

  In the second period H2, the first electrode driver 14 applies a drive signal pulse Sg to a part of the first conductive layer (drive electrode Txn) of the first electrode portion 31 according to the drive signal Vtx. As described above, the second electrode driver 15 applies the drive signal pulse Sg to the second conductive layer (drive electrode Tzn) of the second electrode unit 32 overlapping with the drive electrode Txn in plan view according to the drive signal Vtx. ing. Therefore, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 is a light emission drive voltage at which the first light emitting element portion DEL is lit. It becomes smaller than ΔVFL, and the light emission of the first light emitting element portion DEL is suppressed.

  In the third period H3, the pulse signal ELreq in the lighting period is divided and delayed by a period not overlapping with the first pulse signal ELon1 in the lighting period and the drive signal Vtx (for example, a period twice the drive selection period Htx) The second pulse signal ELon2 of the lighting period is generated, and the pulse signal ELreq of the lighting period is replaced with the first pulse signal ELon1 of the lighting period and the second pulse signal ELon2 of the lighting period. The voltage control circuit 17 generates a lighting pulse Sel1 corresponding to the first pulse signal ELon1 of the lighting period. The voltage control circuit 17 supplies the amplified drive signal pulse Sg to the drive electrode Tzn (part of the second electrode unit 32) sequentially selected in the scan direction Scan based on the drive signal Vtx. Thereafter, the voltage control circuit 17 generates a second lighting pulse Sel2 corresponding to the second pulse signal ELon2 of the lighting period. When the voltage control circuit 17 applies the first lighting pulse Sel1 and the second lighting pulse Sel2 to the second conductive layer (drive electrode Tzn) of a part of the second electrode unit 32 of the input device 2, the first light emitting element unit DEL Emits light. That is, the light emission drive voltage ΔVFL in the forward bias direction is applied between the first electrode portion 31 and the second electrode portion 32 by the first lighting pulse Sel1 and the second lighting pulse Sel2, and the first light emitting element portion DEL emits light Do.

  In the third period H3, the first electrode driver 14 applies a drive signal pulse Sg to a portion of the first conductive layer (drive electrode Txn) of the first electrode portion 31 in accordance with the drive signal Vtx. As described above, the second electrode driver 15 applies the drive signal pulse Sg to the second conductive layer (drive electrode Tzn) of the second electrode unit 32 overlapping with the drive electrode Txn in plan view according to the drive signal Vtx. ing. Therefore, even if the drive signal pulse Sg is applied during the drive selection period Htx, the potential difference between the first electrode portion 31 and the second electrode portion 32 is a light emission drive voltage at which the first light emitting element portion DEL is lit. It becomes smaller than ΔVFL, and the light emission of the first light emitting element portion DEL is suppressed.

  As shown in FIG. 22, if the same driving as the fourth period H4 described in the second embodiment is performed, lighting drive and proximity detection driving in the fourth period H4 can be compatible, so a modification of the second embodiment can be made. The details of the drive control in the fourth period H4 of the input device 2 according to the example will be omitted.

  As described above, when the drive signal Vtx for generating the drive signal pulse Sg and the request signal (display synchronization signal Vp) of the lighting pulse Sel overlap, the second electrode driver 15 divides the lighting pulse back and forth The divided first lighting pulse Sel1, the drive signal pulse Sg, and the divided second lighting pulse Sel2 are sequentially applied to the second electrode section 32 in the above. The second electrode driver 15 gives priority to the application of the drive signal pulse Sg when scanning the drive electrode Tz in a time division manner during a period in which lighting is requested, and delays the lighting pulse Sel compared to the application of the drive signal. As a result, the drive signal pulse Sg and the lighting pulse Sel do not substantially overlap, and the drive of the drive electrode Tx and the light emission of the first light emitting element portion DEL can be compatible.

  In any of the first period H1, the second period H2, the third period H3, and the fourth period H4, the first electrode driver 14 and the second electrode driver 1 turn on / off the first light emitting element portion DEL. Regardless of this, the drive signal pulse Sg can be supplied at a constant timing. Thereby, the accuracy of the proximity detection of the input device 2 does not change even if the first light emitting element portion DEL is in the lighting or non-lighting state.

  Although the case where the drive signal Vtx is applied as a single pulse to each drive electrode Tx and drive electrode Tz has been described, as described in the modification of the second embodiment, even when a plurality of pulses are applied, the first period If the same drive is performed in H1, the second period H2 and the fourth period H4, both the lighting drive and the proximity detection drive can be compatible in the first period H1, the second period H2 and the fourth period H4.

  Note that the second embodiment is a modification of the second embodiment in which the first electrode portion 31 is a cathode of the first light emitting element portion DEL and the second electrode portion 32 is an anode of the first light emitting element portion DEL. The electrode unit 31 may be an anode of the first light emitting element unit DEL, and the second electrode unit 32 may be a cathode of the first light emitting element unit DEL.

  As mentioned above, although the preferred embodiment of the present invention was described, the present invention is not limited to such an embodiment. The content disclosed in the embodiment is merely an example, and various modifications can be made without departing from the scope of the present invention. Appropriate modifications made without departing from the spirit of the present invention also of course fall within the technical scope of the present invention.

  For example, the light emitting layer 22 is not limited to the organic layer, and may be an inorganic layer. The light emitting layer may be a light emitting diode. The light emitting layer 22 may emit white light by depositing a plurality of layers, or the light emitting layers of red (R), green (G) and blue (B) may be separately formed. In the case of the light emitting layer 22 in which a plurality of colors are arranged on the same plane to obtain white display, such as red (R), green (G) and blue (B), the optimum current value differs depending on the light emitting element portion of each color. In the input device 2, when the current value is optimized by the light emitting element unit of each color, when the light emitting element unit of the same color is disposed on the same conductive layer of the first electrode unit 31, the current value is easily optimized.

  Further, even if each of the first conductive layer of the first electrode portion 31, the second conductive layer of the second electrode portion 32, and the third conductive layer of the third electrode portion described above is a single layer, a plurality of layers are stacked. It may be done.

  For example, the input device 2 according to the first and second embodiments and each modification is applied to electronic devices in all fields such as television devices, digital cameras, notebook personal computers, portable terminal devices such as mobile phones, and video cameras. It is possible. In other words, the display device with proximity detection function 1 including the input device 2 according to the first, second, third, and fourth embodiments and each modification, and the display unit 9 is a video signal input from the outside or generated internally. The present invention can be applied to electronic devices in all fields that display video signals as images or video.

1 Display device (Display device with proximity detection function)
Reference Signs List 2 input device 9 display unit 11 control unit 12 gate driver 14 first electrode driver 15 second electrode driver 21 first substrate 22 light emitting layer 23 protective layer 24 first light shielding unit 25 insulating layer 26 cover substrate 31 first electrode unit 32 first 2 electrode unit 33 third electrode unit 40 proximity detection processing unit 91 array substrate 92 counter substrate 93 liquid crystal layer 94 pixel electrode 95 counter electrode 96 color filter 97 sub-pixel 98 insulating layer 99 switching element 141 first electrode control unit 151 second electrode Control section 201 first surface 202 second surface DEL first light emitting element portion Sel lighting pulse Sel1 first lighting pulse Sel2 second lighting pulse Sg drive signal pulse ΔVFL light emission driving voltage

Claims (13)

A first substrate comprising a first surface and a second surface;
A conductive first electrode portion including a plurality of first conductive layers formed on the second surface side, formed in one layer, and having a shape extending continuously in a first direction in plan view;
A second conductive layer formed in a layer different from the first electrode portion, and including a plurality of second conductive layers extending continuously in the first direction and overlapping one first conductive layer in plan view 2 electrode parts,
By electrically contacting the first conductive layer and the second conductive layer overlapping with the first conductive layer in plan view, a voltage in the forward bias direction is applied to the first electrode portion and the second electrode portion. A light emitting layer that emits light;
A light emitting element portion including
And a third electrode portion formed so as to be insulated from the first conductive layer and continuously extending in a direction intersecting the first direction,
A drive signal pulse is applied to the first conductive layer and the second conductive layer to form an electric field with the third electrode portion, and a change in the electric field is detected by the third electrode portion, thereby causing proximity. An input device where an object is detected. The third electrode unit includes a plurality of third conductive layers which are layers different from the first conductive layer and are formed in one layer.
The input device according to claim 1.   The input device according to claim 1, wherein the light emitting element portion can emit light along the shape of the first conductive layer.   The input device according to any one of claims 1 to 3, wherein the light emitting element portion includes a light shielding portion closer to the first surface than the light emitting layer.   The input device according to claim 4, wherein the light shielding portion is formed of a metal material having a metallic gloss.   The input device according to any one of claims 1 to 5, wherein the light emitting layer is an organic light emitting layer.   The input device according to any one of claims 1 to 6, wherein the first electrode unit, the second electrode unit, and the third electrode unit are on the second surface side of the first substrate.   The said 3rd electrode part is in the 1st surface side of the said 1st board | substrate, The said 1st electrode part and the said 2nd electrode part are in the 2nd surface side of the said 1st board | substrate, The input device according to item 1 or 2.   The input device according to claim 8, further comprising: a cover substrate facing the first surface of the first substrate, wherein the third electrode portion is on the cover substrate. A first electrode driver for supplying a voltage to the first electrode portion;
A second electrode driver for supplying a voltage to the second electrode portion;
Proximity in response to the drive signal pulse for change in electric field between the first electrode portion and the third electrode portion, which changes according to the coordinates of the proximity object at a position overlapping in plan view with the first surface of the first substrate And a proximity detection processing unit that processes the detection signal.
The first electrode driver and the second electrode driver scan the first conductive layer and the second conductive layer overlapping in a plan view in a time division manner as drive electrodes, and supply the drive signal pulse. The input device according to any one of 9.   The second electrode driver superimposes the drive signal pulse and the lighting pulse, when the driving signal for generating the driving signal pulse and the request signal of the lighting pulse for causing the light emitting element unit to emit light overlap. The input device according to claim 10.   The second electrode driver divides the lighting pulse before and after when the driving signal for generating the driving signal pulse and the request signal for the lighting pulse for causing the light emitting element to emit light overlap. The input device according to claim 10, wherein the first lighting pulse, the drive signal pulse, and the divided second lighting pulse are sequentially applied to the second electrode portion. A first substrate having a first surface and a second surface, and a plurality of first conductors formed on the second surface side, formed in one layer, and having a shape continuously extending in a first direction in plan view A conductive first electrode portion including a layer, and a layer different from the first electrode portion and having a size that extends continuously in the first direction and overlaps one of the first conductive layers in a plan view Electrically contacting a conductive second electrode portion having a plurality of second conductive layers, and a second conductive layer overlapping the first conductive layer and the first conductive layer in plan view; A light emitting element portion including a light emitting layer that emits light by applying a voltage in the forward bias direction to the second electrode portion, and a direction that is insulated from the first conductive layer and intersects the first direction And a third electrode portion extending continuously with the driving signal to the first conductive layer and the second conductive layer. An input device for an electric field, the proximity object by change in electric field is detected by the third electrode portion is detected between the third electrode portion pulse is applied,
A display device comprising: a display unit disposed on the second surface side of the input device and capable of displaying an image on the first surface side.

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