WO2016181704A1

WO2016181704A1 - Organic electroluminescence module and smart device

Info

Publication number: WO2016181704A1
Application number: PCT/JP2016/058584
Authority: WO
Inventors: 夏樹山本; 一由小俣
Original assignee: コニカミノルタ株式会社
Priority date: 2015-05-13
Filing date: 2016-03-17
Publication date: 2016-11-17
Also published as: JPWO2016181704A1

Abstract

The present invention addresses the problem of providing an organic electroluminescence module that has an organic electroluminescence element provided with a light-emitting function as well as scrolling and tapping capabilities and a smart device that is equipped with the organic electroluminescence module. This organic electroluminescence module has an organic electroluminescence panel and an electrical connection member. The organic electroluminescence module is characterized in that: the organic electroluminescence panel has an organic electroluminescence element that has a structure wherein an organic functional layer group including a light-emitting layer is sandwiched between one pair of electrodes comprising an anode and a cathode and at least one bezel electrode that does not contribute to the emission of light and is disposed in a bezel region serving as a non-light-emitting region; the electrical connection member has electric energy supply lines to the anode and the cathode of the organic electroluminescence panel and a signal line to the bezel electrode; and the electrical connection member is electrically connected to the organic electroluminescence panel via an electrically conductive member.

Description

Organic electroluminescence module and smart device

The present invention relates to an organic electroluminescence module having a touch detection function and a smart device having the same.

Conventionally, as a planar light source body, a light emitting diode using a light guide plate (Light Emitting Diode, hereinafter abbreviated as “LED”), an organic light emitting diode (Organic Light Emitting Diode, hereinafter, an organic electroluminescence element, Organic EL element or “OLED”).

Since around 2008, the production volume of smart devices (for example, smartphones, tablets, etc.) has grown dramatically worldwide. In these smart devices, a key having a flat surface is arranged from the viewpoint of operability. For example, an icon part which is a common function key button provided in the lower part of the smart device corresponds to this. This common function key button has, for example, three types of marks indicating “Home” (displayed by a square mark, etc.), “Back” (displayed by an arrow mark, etc.), and “Search” (displayed by a magnifying glass mark, etc.). It may be provided.

From the viewpoint of improving the visibility, such a common function key button is used in accordance with the pattern shape of the mark to be displayed. A method of installing and using the inside is disclosed (for example, refer to Patent Document 1).

In addition, as a capacitive information input unit using an LED light source, it is possible to increase the sensitivity of the sensor electrode, ensure the detection of the change in capacitance by the sensor circuit, and stably process the user's input operation. Between the target flexible printed circuit (hereinafter abbreviated as “FPC”) on which the sensor electrode is formed and the surface panel, a position avoiding a site such as an icon, rather than an air layer of the same shape A method of improving the accuracy of a detection electrode that detects electrostatic capacitance by providing an adhesive layer having a high dielectric constant is disclosed (for example, see Patent Document 2).

The above-mentioned organic electroluminescence element has attracted attention as a surface light source for illumination in addition to applications such as television, and studies on its application are underway in various fields.

In recent years, organic electroluminescence elements with thin flexibility have begun to be developed using a film substrate, taking advantage of its thinness and excellent flexibility, organic electroluminescence elements can be used as light sources for smart devices, particularly smartphones, For example, studies on application to backlights, functional key lights, decoration lights, camera auxiliary lights, and the like have been actively made. In addition, for decoration lights, each smart media manufacturer needs to appeal its brand by emitting its own logo on smartphones, which tend to have a single design, and fine pixel division like a display However, the possibility of its application has been studied from an early stage.

On the other hand, the development of multifunctional organic electroluminescence elements incorporating different functions is promoted for one pixel of organic electroluminescence light source (illumination) that simply shines. For example, temperature detection using the characteristics of organic electroluminescence panels, Developments such as touch operation detection using the electrode surface of the panel as a detection electrode have been actively developed.

As a touch detection function in such a smart device, a method of arranging a capacitive touch detection type device for touch detection on the back side of the cover glass up to the display unit and the common function key unit has been studied. ing.

As this touch detection type device, a film / film type touch sensor is often used which is laminated to a size equivalent to that of a cover glass. In particular, in the case of a model whose thickness is not restricted, a glass / glass type may be used. In recent years, a capacitive detection type is often employed as a touch detection type. For the main display, a method called “projection capacitive method”, which has fine electrode patterns in the x-axis and y-axis directions, is employed. In this method, it is possible to detect two or more touches called “multi-touch”.

Even when such a touch sensor is used, a light emitting device having no touch function has been used for the common function key part until now. However, in recent years, with the emergence of so-called “in-cell” type or “on-cell” type displays, it has been strongly required to provide a unique touch detection function in a light emitting device for a common function key.

On the other hand, the organic electroluminescence element is a surface light emitter, and unlike the conventional light source for illumination, it is thin and flexible, and can be bent into various shapes. Strength.

With regard to smartphones that are smart devices, in recent years, there has been a complaint that any set maker's product looks the same in the design of the device. For example, brand appeal by making the company logo on the back side emit light. The development of smartphones with appealing functions, such as making calls, flashing during calls, and turning on when receiving calls, is also underway.

As a smartphone operation method, it is becoming mainstream to eliminate common function keys (icon keys) and incorporate the functions into the display, and fingerprint authentication, pulse measurement, small touchpad for operability improvement, etc. The trend of installing various additional function devices on the back of smartphones is also gradually being considered.

However, when designing and verifying the placement of the above company logo and the placement of additional function devices, the mechanical strength of various components inside the smartphone, such as RF (high frequency) antennas, NFC (near field communication) coils, and back covers Due to processing shape restrictions due to restrictions, it has been a problem that there is a limit to mounting a large number of devices on the back of the smartphone.

For models that have a switch function on the back side, in particular, an interactive operability that makes use of the touch function, and a new display function that shines the company logo, there are solutions to achieve both functions. The search continues.

As a specific means for solving the above problem, for example, an in-cell type organic electroluminescence element is a promising candidate as a device having a light emitting function and capable of providing a touch detection function. come. By applying this method, there is no need to laminate an additional touch panel, which can greatly contribute to the reduction of the number of parts. However, in order to provide a multi-touch function such as a scroll operation or a tap operation, in the in-cell type organic electroluminescence element, it is necessary to divide the anode electrode itself into areas.

Therefore, the development of an in-cell type organic electroluminescence module capable of detecting a scrolling action and a tapping action by a finger touch and capable of displaying a company logo and the like and a smart device equipped with the in-cell type are demanded.

JP 2012-194291 A JP 2013-0665429 A

The present invention has been made in view of the above-described problems and situations, and the problem to be solved is an organic electroluminescence module having an organic electroluminescence element having a light emitting display function, a scroll operation function and a tap operation function, and Providing a smart device.

As a result of intensive studies to solve the above problems, the inventor is an organic electroluminescence module constituted by an organic electroluminescence panel and an electrical connection member, and the organic electroluminescence panel is a pair of organic electroluminescence elements. A bezel region, which is a non-light emitting display region constituted by the electrodes, has at least one bezel electrode that does not contribute to the light emission operation, and the electrical connection member is electrically connected to the organic electroluminescence panel via a conductive member. It has been found that the above-mentioned problems can be solved by an organic electroluminescence module characterized by being connected, and the present invention has been achieved.

That is, the problem according to the present invention is solved by the following means.

1. An organic electroluminescence module having an organic electroluminescence panel and an electrical connection member, wherein the organic electroluminescence panel is configured to sandwich an organic functional layer group including a light emitting layer between a pair of an anode electrode and a cathode electrode The device has at least one bezel electrode that does not contribute to the light emitting operation in the bezel region that is a non-light emitting display region,
The electrical connection member has an electrical energy supply line to the anode electrode and the cathode electrode of the organic electroluminescence panel, and a signal line to the bezel electrode,
The organic electroluminescence module, wherein the electrical connection member is electrically connected to the organic electroluminescence panel via a conductive member.

2. A light emitting element driving circuit unit for instructing light emission of the organic electroluminescence element; and a capacitance type touch detection circuit unit for detecting a self-capacitance change of the anode electrode or a self-capacitance change of the bezel electrode. 2. The organic electroluminescence module according to item 1, which is characterized.

3. The light emission period of the organic electroluminescence panel controlled by the light emitting element driving circuit unit is separated from the touch sensing period controlled by the touch detection circuit unit, and the capacitance of the organic electroluminescence panel is not detected in the touch sensing period. Thus, the organic electroluminescence module according to item 2, wherein at least one of the pair of electrodes is in a floating potential state.

4). A smart device comprising the organic electroluminescence module according to any one of items 1 to 3,
A smart device, wherein the organic electroluminescence module is disposed on a main display surface side, a back surface side, or a side surface side.

By the above means of the present invention, it is possible to provide an organic electroluminescence module having an organic electroluminescence element having a light emitting function, a scroll operation and a tap operation, and a smart device equipped with the organic electroluminescence module.

The technical features of the organic electroluminescence module having the configuration defined in the present invention and the mechanism of its effects are as follows.

Up to now, when applying a light emitting member to the company logo part on the back of smart media and trying to incorporate a touch operability function, simple touch operations with the LED chip and light guide plate, Multiple members such as a touch panel module having a complicated electrode pattern configuration, a light shielding member, and a flexible printed circuit (FPC) having a large number of wirings connected to the “simple” operation such as a vertical or horizontal scroll operation Therefore, the light emitting function and the touch detection function are separated from each other. Therefore, the film thickness is increased, which is an obstacle to the small format.

With respect to the above problem, in the organic electroluminescence module of the present invention (hereinafter abbreviated as “organic EL module”), as shown in FIG. In addition to the anode electrode and the cathode electrode that contribute to light emission, a “bezel electrode” that does not contribute to light emission is disposed in at least one place in the bezel region of the organic EL panel, A touch detection circuit is provided for the bezel electrode. Further, as a first electric control member, for controlling light emission of an organic electroluminescence element (hereinafter abbreviated as “organic EL element”) between a pair of anode / cathode electrodes arranged at opposite positions. The light-emitting element driving circuit unit is included, and at least one electrode of the pair of electrodes functions as a touch detection electrode as the second electric control member, and the touch detection circuit unit is included therein.

In the present invention, the anode electrode in the organic EL panel is used as a detection electrode for a normal tap operation or a double tap operation applied to the logo portion with a finger or the like.

Usually, in the configuration of an organic EL panel or an organic EL element, when an anode electrode (anode) or a cathode electrode (cathode) is used as a touch detection electrode (hereinafter also simply referred to as “detection electrode”), the touching finger and touch When the capacitance between the detection electrodes is Cf and the capacitance between the anode electrode and the cathode electrode is Cel, the capacitance when touching (when touching) is “Cf + Cel”, and there is no finger touch. However, in the normal case, Cf <Cel, so that touch detection is difficult.

In the organic EL module of the present invention, the light emitting element driving circuit unit and the touch detection circuit unit are provided independently, and the anode electrode (in order to prevent the capacitance Cel between the anode electrode and the cathode electrode from being detected during touch detection). Touch detection is performed by turning off the switch between the anode) and cathode electrode (cathode) and the light emitting element driving circuit unit, and setting at least one of the anode electrode (anode) and cathode electrode (cathode) to a floating potential state. As a result, small formatting and thinning can be achieved, and simplification of the process can be achieved.

The floating potential state in the present invention refers to a floating potential state that is not connected to the power supply or the ground of the device, and the anode electrode (anode) or cathode electrode (cathode) at the time of touch detection has a floating potential. The electrostatic capacitance Cel of the organic EL panel is not detected, and as a result, touch detection by finger touch becomes possible.

Further, Cel is not present in at least one bezel electrode, and it is possible to detect a finger touch to the area by detecting a change in Cf. By combining touch detection by switch-off operation to the part and Cf change detection of the bezel electrode, it is possible to perform the company logo light emission, touch operation, and slide touch operation on the back and side surfaces of the smart device and the entire surface in a small format. .

Schematic sectional view showing an example of the overall configuration of the organic electroluminescence module of the present invention The schematic top view which shows an example of a structure of the organic electroluminescent panel which comprises an organic electroluminescent module, and an electrical connection member (FPC: flexible printed circuit) Schematic top view and schematic back view showing an example of an organic electroluminescence module configured by connecting an organic electroluminescence panel and an electrical connection member Schematic sectional view showing an example of an organic electroluminescence module The schematic block diagram which shows the example of arrangement | positioning by the side of the main display surface of the smart device which comprised the organic electroluminescent module of this invention The schematic block diagram which shows the example of arrangement | positioning of the back side of the smart device which comprised the organic electroluminescent module of this invention Schematic showing an example of scroll operation and tap operation by a smart device Schematic sectional view showing an example of a smart device having an organic electroluminescence module Drive circuit diagram of Embodiment 1 which is an example of an organic electroluminescence module Schematic circuit diagram showing an example of the configuration of the light emitting element driving circuit unit Circuit operation | movement figure which shows an example of the circuit operation | movement in the sensing period of Embodiment 1 Timing chart showing an example of a light emission period and a sensing period in Embodiment 1 Driving circuit diagram of Embodiment 2 which is another example of the organic electroluminescence module Driving circuit diagram of Embodiment 3 which is another example (time division method) of the organic electroluminescence module Circuit operation | movement figure which shows an example of the circuit operation | movement in the light emission period of Embodiment 3 Circuit operation | movement figure which shows an example of the circuit operation | movement in the sensing period of Embodiment 3 Timing chart showing an example of a light emission period and a sensing period in Embodiment 3 Timing chart which shows another example of the light emission period and sensing period in Embodiment 3 Drive circuit diagram of Embodiment 4 which is another example (time division method) of the organic electroluminescence module

The organic electroluminescence module of the present invention has an organic electroluminescence panel and an electrical connection member, and the organic electroluminescence panel has a configuration in which an organic functional layer group including a light emitting layer is sandwiched between a pair of anode electrodes and a cathode electrode. An organic electroluminescence element and at least one bezel electrode that does not contribute to light emission operation is provided in a bezel region that is a non-light-emitting display region, and the electrical connection member includes an anode electrode and a cathode of the organic electroluminescence panel An electrical energy supply line to the electrode and a signal line to the bezel electrode, wherein the electrical connection member is electrically connected to the organic electroluminescence panel through a conductive member. To do. This feature is a technical feature common to the claimed invention.

As an embodiment of the present invention, an organic electroluminescence module includes a light emitting element driving circuit unit for instructing light emission of the organic electroluminescent element, and a self-operating of the anode electrode, from the viewpoint that the effect of the present invention can be further expressed. A configuration having a capacitive touch detection circuit unit that detects a change in capacitance or a change in self-capacitance of the bezel electrode can simplify the circuit and exhibit an efficient touch detection function. From the viewpoint of being able to.

Further, the light emission period of the organic electroluminescence panel controlled by the light emitting element driving circuit unit and the touch sensing period controlled by the touch detection circuit unit are separated, and in the touch sensing period, the electric capacitance of the organic electroluminescence panel is In order to prevent detection, it is preferable that at least one of the pair of electrodes is in a floating potential state from the viewpoint of more clearly separating the light emission period and the sensing period.

In addition, by arranging the organic electroluminescence module of the present invention on the main display surface side, the back surface side or the side surface side, various users can easily operate regardless of the size of the operating hand or the size of the smart device body. A smart device that can be provided can be provided.

In the following description, in the present invention, a member constituted by a pair of electrodes and an organic functional layer unit is referred to as “organic electroluminescence element or organic EL element”. Moreover, the structure which has arrange | positioned the organic EL element and the sealing member on the transparent base material is called "an organic electroluminescent panel or an organic EL panel." The “organic electroluminescence module or organic EL module” is composed of an organic EL panel, a capacitive touch detection circuit unit, a light emitting element drive circuit unit, and an electrical connection member, and has a light emitting function and a touch detection function. The structure which has this.

In addition, the “bezel region” in the present invention refers to a region that does not contribute to light emission in the organic EL element, specifically, a region excluding the light emitting display region. An electrode that is formed in this bezel region and is not electrically connected to the anode electrode and the cathode electrode of the organic EL element is referred to as a “bezel electrode”.

Hereinafter, constituent elements of the present invention, and modes and modes for carrying out the present invention will be described in detail with reference to the drawings. In the present application, “˜” representing a numerical range is used in the sense that numerical values described before and after the numerical value range are included as a lower limit value and an upper limit value. In the description of each figure, the number described in parentheses at the end of the constituent element represents the code in each figure.

<< Organic EL module >>
The organic EL module of the present invention has a configuration in which an electrical connection member is joined to an organic EL panel, and the electrical connection member is a capacitive touch detection circuit unit and a light emitting element drive for driving the organic EL panel. The organic EL panel has at least an anode electrode and a cathode electrode as a pair of planar electrodes at opposing positions inside, and the pair of electrodes are connected to the light emitting element driving circuit unit. In addition, the present invention is characterized in that a bezel electrode that is not connected to the pair of electrodes is provided in the outer peripheral portion of the light emitting region constituted by the pair of electrodes, that is, the bezel region portion.

Hereinafter, a schematic configuration of the entire organic EL module of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic cross-sectional view showing an example of the configuration of the organic EL module of the present invention.

In the organic EL module (1) shown in FIG. 1, an anode electrode (4, anode) and, for example, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron are formed on a transparent substrate (3). An organic functional layer unit (5) composed of an injection layer or the like is laminated to constitute a light emitting region (LA). A cathode electrode (6, cathode) is laminated on the upper part of the organic functional layer unit (5) to constitute the organic EL element (9). Further, two bezel electrodes (BZ-A and BZ-B) are arranged on the outer peripheral portion of the light emitting region (LA). The outer peripheral part of the organic EL element (9) is sealed with a sealing adhesive layer (7), and on its surface, harmful gas (oxygen, moisture, etc.) from the external environment is prevented from penetrating into the light emitting part. For this purpose, the sealing member (8) is arranged to constitute the organic EL panel (2).

The organic EL panel (2) according to the present invention may have a configuration in which a metal foil layer is provided on the outermost surface side for the purpose of protecting the organic EL element (9).

In the configuration shown in FIG. 1, the anode electrode (4) and the cathode electrode (6), which are a pair of electrodes, are connected to a light emitting element driving circuit unit (12) that controls light emission. Also, the two bezel electrodes (BZ-A and BZ-B), or the two bezel electrodes (BZ-A and BZ-B) and the anode electrode (4), touch detection for detecting touch (finger touch) Connected to the circuit unit (14).

Moreover, in the state separated from the organic EL panel (2), the surface of the transparent base (3) opposite to the surface on which the organic EL element is formed is, for example, an anode of an organic electroluminescence panel on a flexible substrate. An electric connection member (FPC, flexible printed circuit) provided with an electric energy supply line to the electrode and the cathode electrode and a signal line to the bezel electrode is electrically connected to the organic EL panel through the conductive member. Yes. Details of this configuration will be described later.

Next, an organic EL module composed of an organic EL panel and an electrical connection member will be described.

FIG. 2 is a schematic top view showing an example of the configuration of an FPC (flexible printed circuit) as an example of an organic EL panel constituting an organic EL module and an electrical connection member.

2A is a schematic top view showing an example of an organic EL panel.

The organic EL panel (2) shown in FIG. 2A comprises a transparent substrate (3), an anode electrode (4), an organic functional layer group including a light emitting layer (not shown), and a cathode electrode (6). The organic EL element (9) to be formed is arranged to form a light emitting region (LA). From the organic EL element (9), an extraction electrode from the anode electrode (4) and an extraction electrode from the cathode electrode (6) are arranged. Further, a bezel electrode A (BZ-A) and a bezel electrode B (BZ-B) are formed independently of other electrodes on the upper and lower portions outside the light emitting region (LA).

A sealing member (8) is formed on the organic EL element (9) and each bezel electrode.

The ends of the anode electrode (4), the cathode electrode (6), and the bezel electrodes (BZ-A and BZ-B) are electrically connected to an FPC (flexible printed circuit) which is an electrical connection member described with reference to FIG. Because it is connected, it is exposed.

B shown in the lower part of FIG. 2 is a schematic top view showing an example of the configuration of an FPC (flexible printed circuit) which is an electrical connection member.

The FPC shown in B of FIG. 2 is electrically connected to each electrode constituting the organic EL panel (2) described above on a printed wiring board (PCB) to control driving power supply and information. It has a printed wiring (PC) and each pad (P) for transmission to the part. The pads include a bezel electrode A connection pad (BZ-AP) for connecting the bezel electrode A (BZ-A), and a cathode electrode connection pad (6-P) for connecting the cathode electrode (6). ), An anode electrode connection pad (4-P) for connecting the anode electrode (4), and a bezel electrode B connection pad (BZ-BP) for connecting the bezel electrode B (BZ-B). Has been placed.

FIG. 3 is a schematic diagram showing an example of the organic EL module (1) configured by connecting the organic EL panel (2) described in FIG. 2 and an electrical connection member (FPC).

A shown in the upper part of FIG. 3 is a schematic top view of the organic EL module (1), and B shown in the lower part of FIG. 3 is a schematic rear view when the organic EL module (1) is observed from the back side. . Therefore, a schematic top view of the electrical connection member (FPC) observed from the top side shown by B in FIG. 2 and a schematic back view of the electrical connection member (FPC) observed from the back side shown by B in FIG. The upper and lower configurations are reversed.

As shown by A in FIG. 3, the bezel electrode A (BZ-A), the anode electrode (4), the cathode electrode (6), and the bezel electrode B, which are electrodes constituting the organic EL panel (2) described in FIG. (BZ-B), the bezel electrode A connection pad (BZ-AP), the cathode electrode connection pad (6-P), and the anode electrode connection pad (4) included in the electrical connection member (FPC). -P) and the bezel electrode B connection pad (BZ-BP) are electrically connected to form the organic EL module (1). 3 is a transparent base material which comprises an organic electroluminescent panel (2), 8 is the sealing member arrange | positioned at the lowest part, 9 is an organic EL element.

B shown in the lower part of FIG. 3 is a view of the organic EL module (1) seen from the back side, and a protective film (F) is disposed on the outermost surface.

FIG. 4 is a schematic cross-sectional view showing an example of the organic EL module having the configuration described in FIG.

4A is a cross-sectional view represented by the II cut plane shown in FIG. 3 and includes a bezel electrode A formed in the bezel region.

4A, the bezel electrode A (BZ-A) is disposed under the transparent base material (3) and is sealed by the sealing member (8). The end portion of the bezel electrode A (BZ-A) constitutes an exposed extraction electrode, and the end portion of the electrical connection member (FPC) has a bezel electrode A connection pad (BZ-AP). The bezel electrode A (BZ-A) and the bezel electrode A connection pad (BZ-AP) are electrically connected by a conductive member (not shown) to constitute the organic EL module (1). Yes. A protective film (F) for protecting the organic EL module (1) is provided below the sealing member (8).

B shown in the lower part of FIG. 4 is a cross-sectional view taken along the line II-II shown in FIG. 3, and is a cross-sectional view including the cathode electrode (6).

4B, the organic EL element (9) is disposed under the transparent substrate (3) and is sealed by the sealing member (8). A lead electrode of the cathode electrode (6) is formed from the end of the organic EL element (9). A cathode electrode connection pad (6-P) is provided at the end of the electrical connection member (FPC). The cathode electrode (6) and the cathode electrode connection pad (6-P) are electrically conductive members (non-conductive). The organic EL module (1) is configured by electrical connection according to the figure. A protective film (F) for protecting the organic EL module (1) is provided below the sealing member.

5A and 5B are schematic configuration diagrams showing an example of a smart device including the organic EL module of the present invention, FIG. 5A is a main display screen side, and FIG. 5B is a back side.

FIG. 5B is a schematic diagram showing an example of a configuration having a main display screen (120) and a sub display screen (110) on the main surface side of the smart device (100) shown in FIG. 5A.

The smart device (100) shown in FIG. 5A includes a display screen (110) and a main display screen (120) including a liquid crystal display device on the front side. A conventionally known liquid crystal display device can be used as the liquid crystal display device constituting the main display screen (120). On the sub display screen (110), the organic EL module of the present invention may be arranged, or a conventional organic EL module may be arranged.

Each of the sub display screens (110) has a plurality of organic EL panels of the present invention or conventional organic EL panels, and icon display portions (111) having different display patterns are arranged. At the time of light emission, light emission of various display patterns such as figures, characters, and patterns is visually recognized. Further, when the organic EL panel is in a non-light emitting state, various display patterns are not visually recognized.

FIG. 5B is a configuration on the back side of the smart device (100), and an overall configuration in which an organic EL module (1) having a scroll function or a touch function including the organic EL element (9) is arranged as a sub display screen. An example of a schematic diagram is shown.

In the smart device (100) shown in FIGS. 5A and 5B, the organic EL module (1) of the present invention has a main display screen side as shown in FIG. 5A, a back side as shown in FIG. 5B, or a smart device. The organic EL module (1) of the present invention having a scroll function or a touch function as a secondary display screen is preferably provided on the back side as exemplified in FIG. 5B. The configuration is the most preferred embodiment.

Next, an outline of scroll operation and tap operation by a smart device equipped with the organic EL module (1) of the present invention will be described. A specific operation method will be described in an embodiment using a circuit diagram to be described later.

FIG. 6 is a schematic diagram illustrating an example of a scroll operation and a tap operation by a smart device.

A shown in FIG. 6 is a rear view of the same smart device (100) as FIG. 5B, and includes the organic EL module (1) of the present invention.

B shown in FIG. 6 is a diagram showing the internal structure of the region of the organic EL module (1), an organic EL panel (2) including an organic EL element (9) having a light emitting region (LA), An organic EL module (1) composed of an electrical connection member (FPC) is disposed.

FIG. 6C is a diagram showing a state of scrolling operation, for example, page scrolling, on the organic EL panel (2), and the finger (15) is touched in the vertical direction of the organic EL panel (2). By scrolling (SC), page scrolling is performed.

D shown in FIG. 6 is a diagram illustrating a situation where a tap operation is performed. By double-tapping (T) the screen of the organic EL panel (2) with the finger (15) on the organic EL panel (2). , Tap operation can be performed.

FIG. 7 is an overall configuration diagram of a smart device including the organic EL module of the present invention. FIG. 7 shows an example in which the sub display screens are arranged on both the front side and the back side.

In the smart device (100) shown in FIG. 7, the cover glass (104) is disposed on the front surface side (main display screen side), the liquid crystal panel (105) is disposed on the lower surface side thereof, and the lower portion thereof is driven. A battery (not shown) or the like which is power for use is stored. On the other hand, an organic EL panel (2) is arranged on the lower surface side of the sub display screen (110) on the front side, and the organic EL panel (2) passes through a flexible printed circuit (FPC) which is an electrical connection unit. Are connected to a printed wiring circuit (PCB) for controlling driving.

The liquid crystal panel (105) is also connected to a printed wiring circuit (PCB) via a flexible printed circuit (FPC). Moreover, when electrically connecting the extraction electrode part of an organic EL panel (2) and a flexible printed circuit (FPC), it joins using a conductive adhesive. The conductive adhesive will be described later.

In the smart device (100) shown in FIG. 7, a configuration having a sub-display screen (102B) configured from the organic EL module (1) of the present invention shown in FIG. 5B is described on the back side. .

The sub display screen (102B) includes the organic EL element (2) and a flexible printed circuit (FPC) electrically connected thereto on the lower surface side of the light-transmissive protective member (F). The organic EL device (1) and the flexible printed circuit (FPC) are connected to a printed wiring circuit (PCB) that controls driving.

(Scroll operation and tap operation)
The scroll operation and tap operation by the organic EL module (1) provided with the bezel electrode of the present invention shown in FIG. 6 will be described.

In the organic EL module of the present invention, it is preferable to mainly apply the following two touch detection methods.

The details of the first method will be described with reference to FIGS. 8 to 12, which will be described later, but only two bezel electrodes (bezel electrode A and bezel electrode B) are used to perform a scroll operation and a tap operation by touch detection. It is.

In this method, the light emitting element circuit unit is always energized to emit light, and the bezel electrode A and the bezel electrode B having a switch function are used. When a touch is detected, the switches are turned “ON” in order from the bezel electrode A to the bezel electrode B. By detecting the change in the capacitance (hereinafter also referred to as Cf) while switching, the operation of scrolling the page or screen from the top to the bottom can be performed. By detecting the Cf change while switching “ON”, the page or screen can be scrolled from the bottom to the top. In such a method, since it is not necessary to short-circuit the light emitting line of the organic EL element to be in a floating state, a scroll operation or the like can be performed with a very simple circuit or method.

The details of the second method will be described with reference to FIGS. 13 to 17 described later, but using two bezel electrodes (bezel electrode A and bezel electrode B) and an anode electrode of an organic EL element as detection electrodes, time division is performed. This is a method of performing scroll operation and tap operation by touch detection and light emission control of the organic EL element.

In this configuration, by detecting the Cf change while switching the switch “ON” in the order of bezel electrode A → anode detection electrode → bezel electrode B, an operation of scrolling the page or screen from top to bottom can be performed. By detecting the change in Cf while switching the switch “ON” in the order of bezel electrode B → anode detection electrode → bezel electrode A, the page or screen can be scrolled from bottom to top.

Further, a tap operation can be performed by detecting a change in Cf of only the anode detection electrode, and a double tap can be enabled by detecting a change in Cf with a time difference. Details will be described later.

<< Components of organic EL module >>
Next, details of an organic EL panel including an organic EL element, which is a main constituent member of the organic EL module of the present invention, and an electrical connection member (FPC) will be described.

[Configuration of organic EL panel]
The organic EL panel (2) constituting the organic EL module (1) includes, for example, an anode electrode (4, anode) and an organic functional layer unit on the transparent substrate (3) as illustrated in FIG. (5) is laminated, and an organic EL element (9) having a light emitting region (LA) is formed by laminating a cathode electrode (6, cathode) on the organic functional layer unit (5). . The outer peripheral portion of the organic EL element (9) is sealed with a sealing adhesive (7), and a sealing member (8) is disposed on the surface thereof to constitute an organic EL panel (2).

The following is a typical example of the configuration of the organic EL element.

(I) Anode / organic functional layer unit (hole injection transport layer / light emitting layer / electron injection transport layer) / cathode (ii) Anode / organic functional layer unit (hole injection transport layer / light emitting layer / hole blocking layer / Electron injection transport layer) / cathode (iii) Anode / organic functional layer unit (hole injection transport layer / electron blocking layer / light emitting layer / hole blocking layer / electron injection transport layer) / cathode (iv) Anode / organic functional layer Unit (hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer) / cathode (v) Anode / organic functional layer unit (hole injection layer / hole transport layer / light emitting layer / hole) Blocking layer / electron transport layer / electron injection layer) / cathode (vi) anode / organic functional layer unit (hole injection layer / hole transport layer / electron blocking layer / light emitting layer / hole blocking layer / electron transport layer / electron) Injection layer) / cathode Further, in the organic EL panel according to the present invention, the bezel region, which is a non-light emitting region, is positively charged. The (anode electrode) and a cathode (cathode electrode), characterized in that it has a bezel electrode not electrically connected.

As for the outline of the organic EL element applicable to the present invention, for example, JP2013-157634A, JP2013-168552A, JP2013-177361A, JP2013-187221A, JP JP 2013-191644 A, JP 2013-191804 A, JP 2013-225678 A, JP 2013-235994 A, JP 2013-243234 A, JP 2013-243236 A, JP 2013-2013 A. JP 242366, JP 2013-243371, JP 2013-245179, JP 2014-003249, JP 2014-003299, JP 2014-013910, JP 2014-017493. Gazette, JP 2014-017494 A It can be mentioned configurations described in equal.

Further, details of each constituent material constituting the organic EL element will be described.

(Transparent substrate)
Examples of the transparent substrate (3) applicable to the organic EL element according to the present invention include transparent materials such as glass and plastic. Examples of the transparent substrate (3) having light transmittance preferably used include glass, quartz, and resin films. The term “transparent” as used in the present invention means that the light transmittance at a wavelength of 550 nm is 50% or more, preferably 70% or more, and more preferably 85% or more.

Examples of the glass material include silica glass, soda lime silica glass, lead glass, borosilicate glass, and alkali-free glass. On the surface of these glass materials, from the viewpoint of adhesion with adjacent layers, durability, and smoothness, a physical treatment such as polishing, a coating made of an inorganic material or an organic material, or these coatings, if necessary. A combined hybrid coating can be formed.

Examples of the resin material constituting the resin film include polyesters such as polyethylene terephthalate (abbreviation: PET) and polyethylene naphthalate (abbreviation: PEN), polyethylene (abbreviation: PE), polypropylene (abbreviation: PP), cellophane, and cellulose diene. Cellulose esters such as acetate, cellulose triacetate (abbreviation: TAC), cellulose acetate butyrate, cellulose acetate propionate (abbreviation: CAP), cellulose acetate phthalate, cellulose nitrate, and derivatives thereof, polyvinylidene chloride, polyvinyl alcohol ( Abbreviation: PVA), polyethylene vinyl alcohol, syndiotactic polystyrene, polycarbonate (abbreviation: PC), norbornene resin, polymethylpentene, poly -Terketone, polyimide (abbreviation: PI), polyethersulfone (abbreviation: PES), polyphenylene sulfide, polysulfones, polyetherimide, polyetherketoneimide, polyamide, fluororesin, nylon, polymethylmethacrylate (abbreviation: PMMA), acrylic And polyarylates, cycloolefin resins (abbreviation: COP) such as Arton (trade name, manufactured by JSR) and Apel (trade name, manufactured by Mitsui Chemicals).

In the organic EL element, a gas barrier layer may be provided on the transparent substrate (3) as described above, if necessary.

As a material for forming the gas barrier layer, any material that has a function of suppressing intrusion of water or oxygen that causes deterioration of the organic EL element may be used. For example, an inorganic substance such as silicon oxide, silicon dioxide, or silicon nitride may be used. Can be used. Furthermore, in order to improve the brittleness of the gas barrier layer, it is more preferable to have a laminated structure of these inorganic layers and organic layers made of organic materials. Although there is no restriction | limiting in particular about the lamination | stacking order of an inorganic layer and an organic layer, It is preferable to laminate | stack both alternately several times.

[Anode electrode: anode]
Examples of the anode constituting the organic EL element include metals such as Ag and Au, alloys containing metal as a main component, CuI, indium-tin composite oxide (ITO), and metal oxides such as SnO ₂ and ZnO. However, a metal or a metal-based alloy is preferable, and silver or a silver-based alloy is more preferable. The anode according to the present invention may be a transparent electrode or a non-transparent electrode, but is designed as a transparent electrode when the anode side is a light extraction surface (light emitting surface).

When the transparent anode is composed mainly of silver, the purity of silver is preferably 99% or more. Further, palladium (Pd), copper (Cu), gold (Au), or the like may be added to ensure the stability of silver.

The transparent anode is preferably a layer composed mainly of silver, but specifically, it may be formed of silver alone or an alloy containing silver (Ag) as a main component. It may be. Examples of such alloys include silver / magnesium (Ag / Mg), silver / copper (Ag / Cu), silver / palladium (Ag / Pd), silver / palladium / copper (Ag / Pd / Cu), silver -Indium (Ag.In) etc. are mentioned.

Among the constituent materials constituting the anode, the anode constituting the organic EL device according to the present invention is a transparent anode composed mainly of silver and having a thickness in the range of 2 to 20 nm. The thickness is preferably in the range of 4 to 12 nm. A thickness of 20 nm or less is preferable because the absorption component and reflection component of the transparent anode can be kept low and high light transmittance can be maintained.

In the present invention, the layer composed mainly of silver means that the silver content in the transparent anode is 60% by mass or more, preferably the silver content is 80% by mass or more, More preferably, the silver content is 90% by mass or more, and particularly preferably the silver content is 98% by mass or more. The term “transparent” in the transparent anode according to the present invention means that the light transmittance at a wavelength of 550 nm is 50% or more.

The transparent anode may have a configuration in which a layer composed mainly of silver is divided into a plurality of layers as necessary.

Further, in the present invention, when the anode is a transparent anode composed mainly of silver, a base layer may be provided at the lower portion from the viewpoint of improving the uniformity of the silver film of the transparent anode to be formed. preferable. Although there is no restriction | limiting in particular as a base layer, It is preferable that it is a layer containing the organic compound which has a nitrogen atom or a sulfur atom, and the method of forming a transparent anode on the said base layer is a preferable aspect.

[Intermediate electrode]
In the organic EL device according to the present invention, in the case of taking a structure in which two or more organic functional layer units composed of an organic functional layer group and a light emitting layer are laminated between the anode and the cathode, two or more The organic functional layer units can be separated by an intermediate electrode layer unit having independent connection terminals for obtaining electrical connection.

[Bezel electrode]
In the present invention, it is characterized in that a bezel electrode for touch detection is formed in a non-light emitting region, but the bezel electrode is made of the same material and method as those used for forming the anode described above or the cathode described later. It can be formed in the bezel region.

[Light emitting layer]
The light emitting layer constituting the organic EL element preferably has a structure containing a phosphorescent light emitting compound as a light emitting material.

The light emitting layer is a layer that emits light by recombination of electrons injected from the electrode or the electron transport layer and holes injected from the hole transport layer, and the light emitting portion is in the layer of the light emitting layer. Alternatively, it may be an interface between the light emitting layer and another adjacent layer.

The light emitting layer is not particularly limited in its configuration as long as the light emitting material included satisfies the light emission requirements. Moreover, there may be a plurality of layers having the same emission spectrum and emission maximum wavelength. In this case, it is preferable to provide a non-light emitting intermediate layer between the light emitting layers.

The total thickness of the light emitting layers is preferably in the range of 1 to 100 nm, and more preferably in the range of 1 to 30 nm because a lower driving voltage can be obtained. In addition, the sum total of the thickness of a light emitting layer means the thickness also including the said intermediate | middle layer, when a nonluminous intermediate | middle layer exists between light emitting layers.

The light emitting layer as described above is prepared by using, for example, a vacuum emitting method, a spin coating method, a casting method, an LB method (Langmuir Blodget, Langmuir Blodgett method), a wet coating method, an ink jet method, and the like. It can form by the well-known method of these.

The light-emitting layer may be a mixture of a plurality of light-emitting materials having different characteristics. A phosphorescent light-emitting material and a fluorescent light-emitting material (also referred to as a fluorescent dopant or a fluorescent compound) are mixed and used in the same light-emitting layer. Also good. The structure of the light-emitting layer preferably includes a host compound (also referred to as a light-emitting host) and a light-emitting material (also referred to as a light-emitting dopant compound), and emits light from the light-emitting material.

(Host compound)
As the host compound contained in the light emitting layer, a compound having a phosphorescence quantum yield of phosphorescence emission at room temperature (25 ° C.) of less than 0.1 is preferable. Further, the phosphorescence quantum yield is preferably less than 0.01. Moreover, it is preferable that the volume ratio in the layer is 50% or more among the compounds contained in a light emitting layer.

As the host compound, a known host compound may be used alone, or a plurality of types of host compounds may be used in combination. By using a plurality of types of host compounds, it is possible to adjust the movement of charges, and the efficiency of the organic electroluminescent device can be improved. In addition, by using a plurality of kinds of light emitting materials described later, it is possible to mix different light emission, thereby obtaining an arbitrary light emission color.

The host compound used in the light emitting layer may be a conventionally known low molecular compound or a high molecular compound having a repeating unit, and a low molecular compound having a polymerizable group such as a vinyl group or an epoxy group (evaporation polymerizable light emitting host). )

Examples of host compounds applicable to the present invention include, for example, JP-A Nos. 2001-257076, 2001-357777, 2002-8860, 2002-43056, 2002-105445, 2002-352957, 2002-231453, 2002-234888, 2002-260861, 2002-305083, US2005 / 0112407, US2009 No./0030202, International Publication No. 2001/039234, International Publication No. 2008/056746, International Publication No. 2005/089025, International Publication No. 2007/063754, International Publication No. 2005/030900, International Publication No. 2009. / 08 028, WO 2012/023947, can be mentioned JP 2007-254297, JP-European compounds described in Japanese Patent No. 2034538 Pat like.

(Luminescent material)
As the light-emitting material that can be used in the present invention, a phosphorescent compound (also referred to as a phosphorescent compound, a phosphorescent material, or a phosphorescent dopant) and a fluorescent compound (both a fluorescent compound or a fluorescent material) are used. Say).

<Phosphorescent compound>
A phosphorescent compound is a compound in which light emission from an excited triplet is observed. Specifically, it is a compound that emits phosphorescence at room temperature (25 ° C.), and the phosphorescence quantum yield is 0 at 25 ° C. A preferred phosphorescence quantum yield is 0.1 or more, although it is defined as 0.01 or more compounds.

The phosphorescent quantum yield can be measured by the method described in Spectroscopic II, page 398 (1992 edition, Maruzen) of the Fourth Edition Experimental Chemistry Course 7. The phosphorescence quantum yield in the solution can be measured using various solvents, but when using a phosphorescent compound in the present invention, the phosphorescence quantum yield is 0.01 or more in any solvent. Should be achieved.

The phosphorescent compound can be appropriately selected from known compounds used for the light-emitting layer of a general organic EL device, but preferably contains a group 8 to 10 metal in the periodic table of elements. More preferred are iridium compounds, more preferred are iridium compounds, osmium compounds, platinum compounds (platinum complex compounds) or rare earth complexes, and most preferred are iridium compounds.

In the present invention, at least one light emitting layer may contain two or more phosphorescent compounds, and the concentration ratio of the phosphorescent compound in the light emitting layer varies in the thickness direction of the light emitting layer. An inclined configuration may be used.

Specific examples of known phosphorescent compounds that can be used in the present invention include compounds described in the following documents.

Nature 395, 151 (1998), Appl. Phys. Lett. 78, 1622 (2001), Adv. Mater. 19, 739 (2007), Chem. Mater. 17, 3532 (2005), Adv. Mater. 17, 1059 (2005), International Publication No. 2009/100991, International Publication No. 2008/101842, International Publication No. 2003/040257, US Patent Publication No. 2006/835469, US Patent Publication No. 2006/020202194. The compounds described in the specification, US Patent Publication No. 2007/0087321, US Patent Publication No. 2005/0244673, and the like can be mentioned.

Also, Inorg. Chem. 40, 1704 (2001), Chem. Mater. 16, 2480 (2004), Adv. Mater. 16, 2003 (2004), Angew. Chem. lnt. Ed. 2006, 45, 7800, Appl. Phys. Lett. 86, 153505 (2005), Chem. Lett. 34, 592 (2005), Chem. Commun. 2906 (2005), Inorg. Chem. 42,1248 (2003), International Publication No. 2009/050290, International Publication No. 2009/000673, US Pat. No. 7,332,232, US Patent Publication No. 2009/0039776, US Pat. No. 6,687,266, US Pat. As described in Japanese Patent Publication No. 2006/0008670, US Patent Publication No. 2008/0015355, US Pat. No. 7,396,598, US Patent Publication No. 2003/0138667, US Pat. No. 7090928, etc. A compound can be mentioned.

Also, Angew. Chem. lnt. Ed. 47, 1 (2008), Chem. Mater. 18, 5119 (2006), Inorg. Chem. 46, 4308 (2007), Organometallics 23, 3745 (2004), Appl. Phys. Lett. 74, 1361 (1999), International Publication No. 2006/056418, International Publication No. 2005/123873, International Publication No. 2005/123873, International Publication No. 2006/082742, US Patent Publication No. 2005/0260441, Compounds described in U.S. Pat. No. 7,534,505, U.S. Patent Publication No. 2007/0190359, U.S. Pat. No. 7,338,722, U.S. Pat. No. 7,279,704, U.S. Pat. Publication No. 2006/103874, etc. Can also be mentioned.

Furthermore, International Publication No. 2005/076380, International Publication No. 2008/140115, International Publication No. 2011/134013, International Publication No. 2010/086089, International Publication No. 2012/020327, International Publication No. 2011/051404. Further, compounds described in International Publication No. 2011/073149, JP2009-114086, JP2003-81988, JP2002-363552, and the like can also be mentioned.

Preferred phosphorescent compounds in the present invention include organometallic complexes having Ir as a central metal. More preferably, a complex containing at least one coordination mode of a metal-carbon bond, a metal-nitrogen bond, a metal-oxygen bond, and a metal-sulfur bond is preferable.

The phosphorescent compound described above (also referred to as a phosphorescent metal complex) is described in, for example, Organic Letter, vol. 16, 2579-2581 (2001), Inorganic Chemistry, Vol. 30, No. 8, pp. 1685-1687 (1991), J. Am. Am. Chem. Soc. , 123, 4304 (2001), Inorganic Chemistry, Vol. 40, No. 7, pages 1704-1711 (2001), Inorganic Chemistry, Vol. 41, No. 12, pages 3055-3066 (2002) , New Journal of Chemistry. 26, 1171 (2002), European Journal of Organic Chemistry, Vol. 4, pages 695-709 (2004), and methods disclosed in the references and the like described in these documents Can be synthesized.

<Fluorescent compound>
Fluorescent compounds include coumarin dyes, pyran dyes, cyanine dyes, croconium dyes, squalium dyes, oxobenzanthracene dyes, fluorescein dyes, rhodamine dyes, pyrylium dyes, perylene dyes, stilbene dyes. And dyes, polythiophene dyes, and rare earth complex phosphors.

[Organic functional layer group excluding luminescent layer]
Next, each layer other than the light emitting layer constituting the organic functional layer unit will be described in the order of a charge injection layer, a hole transport layer, an electron transport layer, and a blocking layer.

(Charge injection layer)
The charge injection layer is a layer provided between the electrode and the light emitting layer in order to lower the driving voltage and improve the light emission luminance. “The organic EL element and its industrialization front line (NST 30, November 30, 1998) The details are described in Chapter 2, “Electrode Materials” (pages 123 to 166) of the second edition of “The Company”). The charge injection layer includes a hole injection layer and an electron injection layer.

In general, the charge injection layer exists between the anode and the light emitting layer or the hole transport layer if it is a hole injection layer, or between the cathode and the light emitting layer or the electron transport layer if it is an electron injection layer. In the present invention, it is preferable to dispose the charge injection layer at a position adjacent to the transparent electrode.

The hole injection layer is a layer disposed adjacent to the anode, which is a transparent electrode, in order to lower the driving voltage and improve the luminance of light emission. “The organic EL element and its industrialization front line (November 30, 1998 The details are described in Chapter 2, “Electrode Materials” (pages 123 to 166) of the second volume of “issued by TS Co., Ltd.”.

The details of the hole injection layer are described in JP-A-9-45479, JP-A-9-260062, JP-A-8-288069, etc. Examples of materials used for the hole injection layer include: , Porphyrin derivatives, phthalocyanine derivatives, oxazole derivatives, oxadiazole derivatives, triazole derivatives, imidazole derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, hydrazone derivatives, stilbene derivatives, polyarylalkane derivatives, triarylamine derivatives, carbazole derivatives, Indolocarbazole derivatives, isoindole derivatives, acene derivatives such as anthracene and naphthalene, fluorene derivatives, fluorenone derivatives, polyvinylcarbazole, aromatic amines introduced into the main chain or side chain Child material or oligomer, polysilane, a conductive polymer or oligomer (e.g., PEDOT (polyethylene dioxythiophene): PSS (polystyrene sulfonic acid), aniline copolymers, polyaniline, polythiophene, etc.) and the like can be mentioned.

Examples of the triarylamine derivative include benzidine type represented by α-NPD (4,4′-bis [N- (1-naphthyl) -N-phenylamino] biphenyl), and MTDATA (4,4 ′, 4 ″). Examples include a starburst type represented by -tris [N- (3-methylphenyl) -N-phenylamino] triphenylamine), a compound having fluorene or anthracene in the triarylamine-linked core.

In addition, hexaazatriphenylene derivatives described in JP-T-2003-519432 and JP-A-2006-135145 can also be used as hole transport materials.

The electron injection layer is a layer provided between the cathode and the light emitting layer in order to lower the driving voltage and improve the light emission luminance. When the cathode is composed of a transparent electrode, it is adjacent to the transparent electrode. The details are described in the second chapter, Chapter 2, “Electrode Materials” (pages 123 to 166) of “Organic EL devices and their forefront of industrialization” (issued by NTS, November 30, 1998). Are listed.

Details of the electron injection layer are also described in JP-A-6-325871, JP-A-9-17574, JP-A-10-74586, and the like. Specific examples of materials preferably used for the electron injection layer are as follows. Metals represented by strontium and aluminum, alkali metal compounds represented by lithium fluoride, sodium fluoride, potassium fluoride, etc., alkali metal halide layers represented by magnesium fluoride, calcium fluoride, etc. Examples thereof include an alkaline earth metal compound layer typified by magnesium, a metal oxide typified by molybdenum oxide and aluminum oxide, and a metal complex typified by lithium 8-hydroxyquinolate (Liq). When the transparent electrode is a cathode, an organic material such as a metal complex is particularly preferably used. The electron injection layer is preferably a very thin film, and depending on the constituent material, the layer thickness is preferably in the range of 1 nm to 10 μm.

(Hole transport layer)
The hole transport layer is made of a hole transport material having a function of transporting holes, and in a broad sense, the hole injection layer and the electron blocking layer also have a function as a hole transport layer. The hole transport layer can be provided as a single layer or a plurality of layers.

The hole transport material has characteristics of hole injection or transport and electron barrier properties, and may be either organic or inorganic. For example, triazole derivatives, oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, oxazole derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, Examples include stilbene derivatives, silazane derivatives, aniline copolymers, conductive polymer oligomers, and thiophene oligomers.

As the hole transport material, the above-mentioned materials can be used. Further, porphyrin compounds, aromatic tertiary amine compounds and styrylamine compounds can be used. Particularly, aromatic tertiary amine compounds are used. It is preferable to use it.

Representative examples of aromatic tertiary amine compounds and styrylamine compounds include N, N, N ′, N′-tetraphenyl-4,4′-diaminophenyl, N, N′-diphenyl-N, N′— Bis (3-methylphenyl)-[1,1′-biphenyl] -4,4′-diamine (abbreviation: TPD), 2,2-bis (4-di-p-tolylaminophenyl) propane, 1,1 -Bis (4-di-p-tolylaminophenyl) cyclohexane, N, N, N ', N'-tetra-p-tolyl-4,4'-diaminobiphenyl, 1,1-bis (4-di-p -Tolylaminophenyl) -4-phenylcyclohexane, bis (4-dimethylamino-2-methylphenyl) phenylmethane, bis (4-di-p-tolylaminophenyl) phenylmethane, N, N'-diphenyl-N N'-di (4-methoxyphenyl) -4,4'-diaminobiphenyl, N, N, N ', N'-tetraphenyl-4,4'-diaminodiphenyl ether, 4,4'-bis (diphenylamino) Quadriphenyl, N, N, N-tri (p-tolyl) amine, 4- (di-p-tolylamino) -4 '-[4- (di-p-tolylamino) styryl] stilbene, 4-N, N -Diphenylamino- (2-diphenylvinyl) benzene, 3-methoxy-4'-N, N-diphenylaminostilbenzene, N-phenylcarbazole and the like.

For the hole transport layer, the above-described hole transport material may be a known method such as a vacuum deposition method, a spin coating method, a casting method, a printing method including an inkjet method, and an LB method (Langmuir Brodget, Langmuir Brodgett method). The thin film can be formed by the method. The thickness of the hole transport layer is not particularly limited, but is usually in the range of 5 nm to 5 μm, preferably in the range of 5 to 200 nm. The hole transport layer may have a single structure containing one or more of the above materials.

Also, the p property can be increased by doping impurities into the hole transport material constituting the hole transport layer. Examples thereof include JP-A-4-297076, JP-A-2000-196140, 2001-102175 and J.P. Appl. Phys. 95, 5773 (2004), and the like.

Thus, it is preferable to increase the p property of the hole transport layer because an organic EL element with lower power consumption can be produced.

(Electron transport layer)
The electron transport layer is made of a material having a function of transporting electrons, and in a broad sense, an electron injection layer and a hole blocking layer are also included in the electron transport layer. The electron transport layer can be provided as a single layer structure or a stacked structure of a plurality of layers.

In the electron transport layer having a single layer structure and the electron transport layer having a multilayer structure, as an electron transport material (also serving as a hole blocking material) constituting the layer portion adjacent to the light emitting layer, electrons injected from the cathode (cathode) are used. What is necessary is just to have the function to transmit to a light emitting layer. As such a material, any one of conventionally known compounds can be selected and used. Examples include nitro-substituted fluorene derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, carbodiimides, fluorenylidenemethane derivatives, anthraquinodimethane, anthrone derivatives, and oxadiazole derivatives. Furthermore, in the above oxadiazole derivative, a thiadiazole derivative in which the oxygen atom of the oxadiazole ring is substituted with a sulfur atom, and a quinoxaline derivative having a quinoxaline ring known as an electron-withdrawing group can also be used as a material for the electron transport layer. it can. Furthermore, a polymer material in which these materials are introduced into a polymer chain, or a polymer material having these materials as a polymer main chain can also be used.

In addition, metal complexes of 8-quinolinol derivatives such as tris (8-quinolinol) aluminum (abbreviation: Alq ₃ ), tris (5,7-dichloro-8-quinolinol) aluminum, tris (5,7-dibromo-8- Quinolinol) aluminum, tris (2-methyl-8-quinolinol) aluminum, tris (5-methyl-8-quinolinol) aluminum, bis (8-quinolinol) zinc (abbreviation: Znq), etc. and the central metal of these metal complexes A metal complex replaced with In, Mg, Cu, Ca, Sn, Ga, or Pb can also be used as a material for the electron transport layer.

The electron transport layer can be formed by thinning the above material by a known method such as a vacuum deposition method, a spin coating method, a casting method, a printing method including an inkjet method, and an LB method. The thickness of the electron transport layer is not particularly limited, but is usually in the range of 5 nm to 5 μm, preferably in the range of 5 to 200 nm. The electron transport layer may have a single structure composed of one or more of the above materials.

(Blocking layer)
Examples of the blocking layer include a hole blocking layer and an electron blocking layer, which are provided as necessary in addition to the constituent layers of the organic functional layer unit described above. For example, it is described in JP-A Nos. 11-204258 and 11-204359, and “Organic EL elements and the forefront of industrialization (published by NTT Corporation on November 30, 1998)” on page 237. Hole blocking (hole block) layer and the like.

The hole blocking layer has a function of an electron transport layer in a broad sense. The hole blocking layer is made of a hole blocking material that has a function of transporting electrons but has a very small ability to transport holes, and recombines electrons and holes by blocking holes while transporting electrons. Probability can be improved. Moreover, the structure of an electron carrying layer can be used as a hole-blocking layer as needed. The hole blocking layer is preferably provided adjacent to the light emitting layer.

On the other hand, the electron blocking layer has a function of a hole transport layer in a broad sense. The electron blocking layer is made of a material that has the ability to transport holes and has a very small ability to transport electrons. By blocking holes while transporting holes, the probability of recombination of electrons and holes is improved. Can be made. Moreover, the structure of a positive hole transport layer can be used as an electron blocking layer as needed. The layer thickness of the hole blocking layer applied to the present invention is preferably in the range of 3 to 100 nm, and more preferably in the range of 5 to 30 nm.

〔cathode〕
The cathode is an electrode that functions to supply holes to the organic functional layer group and the light emitting layer, and a metal, an alloy, an organic or inorganic conductive compound, or a mixture thereof is used. Specifically, gold, aluminum, silver, magnesium, lithium, magnesium / copper mixture, magnesium / silver mixture, magnesium / aluminum mixture, magnesium / indium mixture, indium, lithium / aluminum mixture, rare earth metal, ITO, ZnO, TiO Oxide semiconductors such as ₂ and SnO ₂ .

The cathode can be formed as a thin film by depositing these conductive materials by vapor deposition or sputtering. The sheet resistance as a cathode is several hundred Ω / sq. The film thickness is usually in the range of 5 nm to 5 μm, preferably in the range of 5 to 200 nm.

In the case where the organic EL element is a double-sided light emitting type in which the emitted light L is also taken out from the cathode side, a light transmissive cathode is selected and configured.

(Sealing member)
Examples of the sealing means used for sealing the organic EL element include a method in which a sealing member, a cathode, and a transparent substrate are bonded with a sealing adhesive.

The sealing member only needs to be disposed so as to cover the display area of the organic EL element, and may be concave or flat. Moreover, if it is not a light extraction side, transparency and electrical insulation will not be specifically limited.

Specific examples of the sealing member include a glass plate, a polymer plate, a metal plate, and a polymer film. Examples of the glass plate include soda-lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, and quartz. Examples of the polymer plate or polymer film include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfide, and polysulfone. Examples of the metal plate include one or more metals or alloys selected from the group consisting of stainless steel, iron, copper, aluminum, magnesium, nickel, zinc, chromium, titanium, molybdenum, silicon, germanium, and tantalum.

As the sealing member, a polymer film and a metal film can be preferably used from the viewpoint of reducing the thickness of the organic EL element. Furthermore, the polymer film has a water vapor transmission rate of 1 × 10 ⁻³ g / m ² .multidot.m at a temperature of 25 ± 0.5 ° C. and a relative humidity of 90 ± 2% RH measured by a method according to JIS K 7129-1992. The oxygen permeability measured by a method according to JIS K 7126-1987 is preferably 1 × 10 ⁻³ ml / m ² · 24 h · atm (1 atm is 1.01325 × 10 ⁵ a Pa) equal to or lower than a temperature of 25 ± 0.5 ° C., water vapor permeability at a relative humidity of 90 ± 2% RH is preferably not more than ^{^{1 × 10 -3 g / m 2}} · 24h.

In the gap between the sealing member and the display area (light emitting area) of the organic EL element, an inert gas such as nitrogen or argon, or an inert liquid such as fluorocarbon or silicon oil is injected in the gas phase and liquid phase. can do. Further, the gap between the sealing member and the light emitting region of the organic EL element can be evacuated, or a hygroscopic compound can be sealed in the gap.

《Electrical connection member》
The electrical connection member according to the present invention is also called FPC (Flexible Printed Circuit), and is also called a printed circuit board (PCB, Printed Circuit Board) or a printed circuit board as shown in FIG. ) Above, printed wiring (PC) and each pad (electrically connected to each electrode constituting the organic EL panel (2) described above to supply driving power and transmit each information to the control unit) P). The pads include a bezel electrode A connection pad (BZ-AP) for connecting the bezel electrode A (BZ-A), and a cathode electrode connection pad (6-P) for connecting the cathode electrode (6). ), An anode electrode connection pad (4-P) for connecting the anode electrode (4), and a bezel electrode B connection pad (BZ-BP) for connecting the bezel electrode B (BZ-B). The organic EL module of the present invention is configured by being bonded to the organic EL panel in the arrangement.

The substrate constituting the printed circuit board (PCB) is not particularly limited as long as it is a transparent and flexible plastic film having sufficient mechanical strength. Polyimide resin (abbreviation: PI), polycarbonate resin (Abbreviation: PC), polyethylene terephthalate resin (abbreviation: PET), polyethylene naphthalate resin (abbreviation: PEN), cycloolefin resin (abbreviation: COP), and the like, preferably a polyimide resin (abbreviation: PI), Polyethylene terephthalate resin (abbreviation: PET) and polyethylene naphthalate resin (abbreviation: PEN) are preferable.

Further, the material constituting the printed wiring (PC, Printed Circuit) is preferably composed of a conductive metal material, and examples thereof include gold, silver, copper, and ITO. In the invention, it is preferable to form with copper.

As a method of forming a printed wiring (PC), after forming a copper layer on a printed wiring board (PCB), a photoresist material or the like is applied, or a dry resist film is laminated, and a desired wiring pattern is obtained. As described above, exposure is performed through a mask material or the like, development is performed, and a resist pattern is formed through an unnecessary resist stripping process.

Next, a desired printed wiring pattern is formed by removing the copper layer in a region other than the mask by immersing in a copper layer etchant or applying the etchant by showering.

In the organic EL module of the present invention, it is preferable that the electrical connecting member and the organic EL panel are electrically connected via a conductive member.

The members to be electrically connected include the bezel electrode A connection pad (BZ-AP) for connecting the bezel electrode A (BZ-A) as exemplified in FIG. 2B, the cathode electrode (6). For connecting the cathode electrode connection pad (6-P) for connecting the anode electrode, the pad for connecting the anode electrode (4-P) for connecting the anode electrode (4), and the bezel electrode B (BZ-B) A pad such as a bezel electrode B connection pad (BZ-BP).

The constituent material of the pad is not particularly limited as long as it is a member having conductivity, but is preferably an anisotropic conductive film (ACF, Anisotropic Conductive Film), a conductive paste, or a metal paste.

Examples of the anisotropic conductive film (ACF) include a conductive film obtained by forming a layer having fine conductive particles having conductivity mixed with a thermosetting resin into a film shape. The conductive particle-containing layer that can be used in the present invention is not particularly limited as long as it is a layer containing conductive particles as an anisotropic conductive member, and can be appropriately selected according to the purpose. The conductive particles that can be used as the anisotropic conductive member according to the present invention are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include metal particles and metal-coated resin particles. Examples of commercially available ACFs include low-temperature curing ACFs that can also be applied to resin films, such as MF-331 (manufactured by Hitachi Chemical).

Examples of the metal particles include nickel, cobalt, silver, copper, gold, and palladium. These may be used individually by 1 type and may use 2 or more types together. Among these, nickel, silver, and copper are preferable. In the said metal particle, you may use the particle | grains which gave the surface gold | metal | money and palladium for the purpose of preventing surface oxidation. Furthermore, you may use what gave the metal film and the insulating film with the organic substance on the surface.

Examples of the metal-coated resin particles include particles in which the surface of the resin core is coated with any metal of nickel, copper, gold, and palladium. Similarly, particles having gold and palladium added to the outermost surface of the resin core may be used. Further, a resin core whose surface is coated with a metal protrusion or an organic material may be used.

As the metal paste, commercially available metal nanoparticle pastes such as silver particle paste, silver-palladium particle paste, gold particle paste, and copper particle paste can be appropriately selected and used. Examples of the metal paste include silver pastes for organic substrates (CA-6178, CA-6178B, CA-2500E, CA-2503-4, CA-2503N, CA-271, etc., sold by Daiken Chemical Co., Ltd. Resistance value: 15-30 mΩ · cm, formed by screen printing, curing temperature: 120-200 ° C., LTCC paste (PA-88 (Ag), TCR-880 (Ag), PA-Pt (Ag · Pt)) ), Silver paste for glass substrate (US-201, UA-302, baking temperature: 430 to 480 ° C.), and the like.

<< Configuration example of organic EL module >>
Next, a light emission operation and a touch detection operation of the organic EL module of the present invention will be described using a drive circuit diagram and a timing chart.

[Embodiment 1: Constant-emission organic EL module]
FIG. 8 is a drive circuit diagram showing an example (embodiment 1) of a method for driving an organic EL module.

In the circuit diagram of the organic EL module (1) shown in FIG. 8, the organic EL panel (2) shown in the center has an anode electrode wiring (25) and a cathode electrode wiring (26), and a diode is provided between both wirings. An organic EL element (22) and a capacitor (21, Cel) are connected.

In the left light emitting element drive circuit unit (12), the anode electrode wiring (25) drawn from the anode electrode is directly connected to the light emitting element drive circuit section (23), while the cathode electrode drawn from the cathode electrode. The wiring (26) is also directly connected to the light emitting element driving circuit unit (23). Further, the light emitting element driving circuit section (23) is connected to the ground (27). This ground (27) is specifically called a signal ground.

The light emitting element drive circuit unit (12) incorporates a constant current drive circuit or a constant voltage drive circuit, controls the light emission timing of the organic EL element, and applies reverse bias (reverse applied voltage) as necessary. It has a light emitting element driving circuit section (23).

The light emitting element driving circuit unit (12) in the present invention is composed of an anode electrode wiring (25), a light emitting element driving circuit section (23), and a cathode electrode wiring (26) as shown by the solid line in FIG. The circuit range.

On the other hand, in the touch detection circuit unit (14) shown on the right side, an independent first bezel electrode A (BZ-A) for functioning as a detection electrode is connected via a switch 4 (SW4) to the touch detection circuit unit ( 24) and further on the lower side, the second bezel electrode B (BZ-B) is connected to the touch detection circuit section (24) via the switch 5 (SW5).

The touch detection circuit unit (24) is connected to the ground (27). A configuration in which the switch 4 (SW4) and the switch 5 (SW5) are incorporated in the touch detection circuit unit (24) may be employed.

The configuration of the light emitting element driving circuit unit (23) according to the present invention is not particularly limited, and a conventionally known light emitting element driving circuit unit (organic EL element driving circuit) can be applied.

The light emission pattern in the organic EL element having the circuit configuration shown in FIG. 8 is a system that always emits light. In addition, for example, as shown in FIG. 13 to FIG. Accordingly, a time division method having a function of applying a current according to the amount of light emitted from the organic EL element, which is a light emitting element, may be used between the anode electrode and the cathode electrode.

As this light emitting element driving circuit, a constant current circuit including a step-up or step-down DC-DC converter circuit, a current value feedback circuit, a DC-DC converter switch control circuit, and the like is known. Reference can be made to the light emitting element driving circuits described in Japanese Patent Application Laid-Open No. 2002-156944, Japanese Patent Application Laid-Open No. 2005-265937, Japanese Patent Application Laid-Open No. 2010-040246, and the like.

Hereinafter, a configuration example of the light emitting element driving circuit unit (23) applicable to the present invention will be shown below.

FIG. 9 is a schematic circuit diagram showing an example of the configuration of the light emitting element driving circuit unit (23) according to the present invention.

In FIG. 9, the light emitting element drive circuit section (23) includes a step-up or step-down DC-DC converter circuit (31), a DC-DC converter switch element control circuit (32), and a current value feedback circuit (33). have. For example, when the detection resistance is R ₁ and the comparison potential is V _ref , the anode potential of the organic EL element (22) is DC− so that the current I _OLED flowing through the organic EL element (22) becomes V _ref / R _1. A constant current circuit can be obtained by stepping up or down the voltage by the DC converter circuit (31). Here, the feedback circuit (33) _applies feedback to the output V _out of the DC-DC converter circuit (31) so that V _X = V _ref . For example, when V _ref = 0.19 V and R ₁ = 100Ω, V _out is adjusted by the DC-DC converter circuit (31) so that the constant current value V _ref / R ₁ = 1.9 mA.

On the other hand, the configuration of the touch detection circuit unit (24) is not particularly limited, and a conventional known touch detection circuit unit can be applied. In general, the touch detection circuit is composed of an amplifier, a filter, an AD converter, a rectifying / smoothing circuit, a comparator, and the like. Typical examples include a self-capacitance detection method, a series capacitance division comparison method (OMRON method), and the like. In addition, reference can be made to touch detection circuits described in JP 2012-073783 A, JP 2013-088932 A, JP 2014-053000 A, and the like.

In the present invention, the switches constituting the drive circuit are not particularly limited as long as they have a switch function such as an FET (field effect transistor), a TFT (thin film transistor), or the like.

Next, the sensing method (touch detection method) in Embodiment 1 shown in FIG. 8 will be described.

FIG. 10 is a circuit operation diagram illustrating an example of the circuit operation in the sensing period according to the first embodiment.

In Embodiment 1 shown in FIG. 10, the organic EL element (22) is always connected to the light emitting element driving circuit unit (23), continuously emits light, and is controlled by the touch detection circuit unit. This is a driving method in which a sensing period appears periodically.

As the sensing period, first, in the state where the switch 4 (SW4) of the bezel electrode A (BZ-A) of the touch detection circuit unit (14) is set to “ON”, the bezel electrode A (BZ-A) which is the detection electrode. By touching the upper surface of the protective member with the finger (15A), a capacitance Cf1 is generated between the finger (15A) and the bezel electrode A (BZ-A) as the detection electrode, and the first touch detection A is performed. Do. The capacitance Cf1 is connected to the ground (16A, ground). 29A is a touch detection information route at the time of the first sensing. At this time, the switch 5 (SW5) of the bezel electrode B (BZ-B) is in the “OFF” state.

Next, the switch 4 (SW4) of the bezel electrode A (BZ-A) is set to “OFF”, and the switch 5 (SW5) of the bezel electrode B (BZ-B) is set to “ON”. By touching the upper surface of the protective member of the electrode B (BZ-B) with the finger (15B), a capacitance Cf2 (not shown) is formed between the finger (15B) and the bezel electrode B (BZ-B) as the detection electrode. ) Occurs, and the second touch detection B is performed. 29B is a touch detection information route at the time of second sensing.

In this way, by detecting the amount of change in the capacitances Cf1 and Cf2 while switching “ON” and “OFF” of the switches SW4 and SW5 in the order of the bezel electrode A to the bezel electrode B at the time of touch detection, By detecting the change in the capacitance Cf while switching the “ON” and “OFF” of the switch in the order from the bezel electrode B to the bezel electrode A, the page or screen can be scrolled from top to bottom. Scroll pages and screens from bottom to top.

FIG. 11 is a timing chart of circuit operation in the sensing period of the first embodiment described in FIG.

As shown in FIG. 11, since the light emitting element drive circuit unit (23) has no switch and the circuit is always connected, the OLED applied voltage is always “ “ON” is always in the light emission state, and the entire period is the light emission period (LT). On the other hand, SW4 and SW5 of the touch detection circuit unit (14) are sequentially “ON / OFF”, so that the sensing period (ST) can be divided into two to periodically perform touch detection.

[Embodiment 2: Organic EL module 2 of constant light emission type]
FIG. 12 is a drive circuit diagram showing another example (embodiment 2) of the always-emitting organic EL module.

In FIG. 12, the light emitting element drive circuit section (23) is the same as the first embodiment shown in FIG.

The touch detection circuit unit (14) is composed of a bezel electrode A (BZ-A) and a bezel electrode B (BZ-B) as in the first embodiment. Each bezel electrode is an independent touch detection circuit. Connected to the units (24 and 25), and each touch detection is controlled independently. Accordingly, SW4 and SW5 in Embodiment 1 shown in FIG. 10 are not necessary.

The sensing method is the same as in the first embodiment.

[Embodiment 3: Time division method in which the light emission period and the touch sensing period are separated]
Embodiment 3 is a time-division type organic EL module in which the light emission period (LT) of the organic EL panel controlled by the light emitting element drive circuit unit and the touch sensing period (ST) controlled by the touch detection circuit unit are separated. 1).

FIG. 13 is a drive circuit diagram of the time-division type organic EL module (1) in which the light emission period (LT) and the touch sensing period (ST) are separated.

In the circuit diagram of the organic EL module (1) shown in FIG. 13, the organic EL panel (2) shown in the center has an anode electrode wiring (25) and a cathode electrode wiring (26), and a diode is provided between both wirings. An organic EL element (22) and a capacitor (21, Cel) are connected.

In the left side light emitting element drive circuit unit (12), the anode electrode wiring (25) for organic EL element light emission led out from the anode electrode is connected to the light emitting element drive circuit unit (23) via the switch 1 (SW1). On the other hand, the cathode electrode wiring (26) drawn from the cathode electrode is connected to the light emitting element drive circuit section (23) via the switch 2 (SW2). Further, the light emitting element driving circuit section (23) is connected to the ground (27).

The light emitting element driving circuit unit (12) incorporates a constant current driving circuit or a constant voltage driving circuit, controls the light emission timing of the organic EL element, and applies reverse bias (reverse applied voltage) as necessary. And a light emitting element driving circuit portion (23). In FIG. 13, the light emitting element driving circuit unit (23) and SW1 and SW2 are shown as independent components. However, the switch 1 (SW1) is connected to the light emitting element driving circuit unit (23) as necessary. ) Or switch 2 (SW2) may be incorporated.

The light emitting element driving circuit unit (12) in the configuration shown in FIG. 13 is a circuit range including the anode electrode wiring (25), SW1, the light emitting element driving circuit unit (23), SW2, and the cathode electrode wiring (26). Say.

On the other hand, the touch detection circuit unit (14) shown on the right side touches via the switch 4 (SW4) in order to cause the first bezel electrode A (BZ-A) described in FIG. 8 to function independently as a detection electrode. It is connected to the detection circuit section (24). Further, as explained in FIG. 8, the second bezel electrode B (BZ-B) is connected to the touch detection circuit section (24) via the switch 5 (SW5) at the bottom. .

In addition, in order to function as a touch detection electrode, the anode electrode wiring 2 (25A) drawn out from the anode electrode is connected to the touch detection circuit unit (24) via the switch 3 (SW3), and the touch detection electrode group Is configured.

The touch detection circuit unit (24) is connected to the ground (27). The switch 3 (SW3), the switch 4 (SW4), and the switch 5 (SW5) may be incorporated in the touch detection circuit unit (24).

In the organic EL module (1) having the circuit configuration shown in FIG. 13, the light emission period (LT) of the organic EL panel controlled by the light emitting element driving circuit unit (12) and touch detection are controlled by ON / OFF control of each switch. The touch sensing period (ST) controlled by the circuit unit (14) can be separated and driven, and the touch sensor function can be expressed in the organic EL module.

FIG. 14 shows the state of the drive circuit diagram in the light emission period (LT) of the organic EL panel. By setting SW1 and SW2 to “ON” and SW3 to SW5 to “OFF”, the organic EL panel is turned on. Light emission starts when the voltage of the element (22) rises from the off-voltage and becomes a voltage necessary for light emission. Next, when SW1 and SW2 are turned “OFF”, the current supply to the organic EL element is stopped and turned off.

FIG. 15 shows a drive circuit diagram in the touch sensing period (ST) of the organic EL panel. SW3 and SW5 which are switches for controlling the drive of the touch detection circuit unit (14) are turned on by SW1 and SW2. In the state of “”, the state is set to “OFF”, and after SW1 and SW2 are set to “OFF”, as shown in FIG. However, the timing at which SW3 is turned “ON” is preferably set to “ON” after a predetermined standby time (t) has elapsed after SW1 and SW2 described above are turned “OFF”. The standby period (t) is preferably in the range of about 0τ to 5τ of the charge / discharge time constant τ of the organic EL element.

FIG. 16 is a timing chart of a method in which the light emission period and the touch sensing period in the third embodiment are time-divided.

In the timing chart shown in FIG. 16, the period from when SW1 and SW2 are turned “ON” to when it is turned “OFF” is the light emission period (LT), and SW1 and SW2 are turned “OFF” and the standby time (t , (Not shown), SW 4, SW 3, SW 5 are sequentially set to “ON” and “OFF”, touch detection is performed, and the period from when SW 5 is turned “OFF” is the sensing period (ST), LT + ST is referred to as one frame period (1FT).

The light emitting period (LT), touch sensing period (ST), and one frame period (1FT) in the organic EL module of the present invention are not particularly limited, and conditions suitable for the environment to be applied can be appropriately selected. As an example, the light emission period (LT) of the organic EL element is 0.1 to 2.0 msec. And the touch sensing period (ST) is 0.05 to 0.3 msec. The one frame period (1FT) can be in the range of 0.15 to 2.3 msec. In addition, the one frame period (1FT) is preferably 60 Hz or more for the purpose of reducing flicker.

The touch detection method in the touch sensing period of the timing chart shown in FIG. 16 is as described above, and “ON” and “OFF” of the switch 4 (SW4) of the bezel electrode A (BZ-A) → the anode detection electrode (25A ) Switch 3 (SW3) “ON” and “OFF” → Bezel electrode B (BZ-B) switch 5 (SW5) switch “ON” and “OFF” while touching with fingers (15A to 15C) By detecting the change in Cf1 to Cf3 due to the operation, the operation of scrolling the page or screen from the top to the bottom can be performed. Conversely, the bezel electrode B (BZ-B) → the anode detection electrode (25A) → the bezel electrode A ( BZ-A) Scrolls pages and screens from bottom to top by detecting Cf changes while switching each switch between “ON” and “OFF”. Can Lumpur.

Further, a tap operation can be performed by detecting a change in Cf of only the anode detection electrode (25A), and a double tap can be detected by detecting a change in Cf with a time difference.

FIG. 17 is a timing chart showing another example of the light emission period and the sensing period in the embodiment 3. Compared to the timing chart shown in FIG. 16, the switch 4 (SW4) of the bezel electrode A (BZ-A) and the bezel electrode A mode in which the sensing period by the switch 5 (SW5) of B (BZ-B) overlaps with the light emission period (LT) of the organic EL element is shown. That is, it is a method of performing sensing with the bezel electrode during the light emission period (LT) of the organic EL element.

[Embodiment 4: Time division method 2 in which light emission period and touch sensing period are separated]
FIG. 18 is a drive circuit diagram showing another example (embodiment 4) of the time-division type organic EL module in which the light emission period and the touch sensing period are separated.

In FIG. 18, the light-emitting element drive circuit unit (23) is the same as that of the third embodiment shown in FIGS. 13 to 15, and the light emission period of the organic EL element is set by “ON” and “OFF” of SW1 and SW2. Control.

On the other hand, the electrode configuration for touch detection in the touch detection circuit unit (14) is the same as in the third embodiment, with the bezel electrode A (BZ-A), the bezel electrode B (BZ-B), and the anode detection electrode (25A). The bezel electrode (BZ-A and BZ-B) and the anode detection electrode (25A) are connected to individual touch detection circuit units (24 to 26), respectively, and each touch detection is performed independently. And control it. In such a configuration, SW4 and SW5 as shown in FIG. 13 are unnecessary in the circuit of the bezel electrode A (BZ-A) and the bezel electrode B (BZ-B). The sensing method is the same as the method shown in FIGS. 16 and 17 of the third embodiment.

<< Application fields of organic EL modules >>
The organic EL module of the present invention can achieve small formatting and thinning, can achieve simplification of the process, and can be suitably used for various smart devices and lighting devices such as smartphones and tablets.

[Smart device]
As shown in FIGS. 5 to 7 described above, for example, it can be provided as a smart device (100) including the organic EL module of the present invention on the sub-display screen on the back side.

The organic electroluminescence module of the present invention is an organic electroluminescence module having an organic electroluminescence element having a light emitting function and a scroll operation and a tap operation, and can be suitably used for various smart devices such as smartphones and tablets.

DESCRIPTION OF SYMBOLS 1 Organic EL module 2 Organic EL panel 3 Transparent base material 4 Anode electrode 4-P Anode electrode connection pad 5 Organic functional layer unit 6 Cathode electrode 6-P Cathode electrode connection pad 7 Adhesive layer for sealing 8

Sealing member

9, 22 Organic EL element 10 Conventional touch detection electrode 12 Light emitting element drive circuit unit 14 Touch

detection circuit unit

15, 15A, 15B, 15C Finger 16, 16A Ground (ground)
21 Condenser (Cel)
23 Light-Emitting Element

Drive Circuit Unit

24, 25, 26 Touch Detection Circuit Unit 25 Anode Electrode Wiring 26 Cathode Electrode Wiring 27 Ground 28 Light Emission

Control Information Route

29A, 29B, 30 Touch Detection Information Route 31 DC-DC Converter Circuit 32 Switch Element Control Circuit 33 Feedback circuit 100 Smart device 102B Sub display screen (rear side)
104 Cover Glass 105 Liquid Crystal Panel 110 Sub Display Screen 111 Icon Display Unit 120 Liquid Crystal Display 1FT 1 Frame Period BZ-A Bezel Electrode A
BZ-B Bezel electrode B
BZ-A-P Bezel electrode A connection pad BZ-BP Bezel electrode B connection pad Cf, Cf1 Capacitance between finger and touch detection electrode Cel Capacitance between anode electrode and cathode electrode F Protection member FPC Flexible printed circuit LA Light emitting area LT Light emitting period PCB Printed wiring circuit PL Printed wiring SC Scroll ST Sensing period, Touch sensing period SW1 Switch 1
SW2 switch 2
SW3 switch 3
SW4 switch 4
SW5 Switch 5
T tap

Claims

An organic electroluminescence module having an organic electroluminescence panel and an electrical connection member, wherein the organic electroluminescence panel includes an organic functional layer group including a light emitting layer between a pair of an anode electrode and a cathode electrode. The device has at least one bezel electrode that does not contribute to the light emitting operation in the bezel region that is a non-light emitting display region,
The electrical connection member has an electrical energy supply line to the anode electrode and the cathode electrode of the organic electroluminescence panel, and a signal line to the bezel electrode,
The organic electroluminescence module, wherein the electrical connection member is electrically connected to the organic electroluminescence panel via a conductive member.
A light emitting element driving circuit unit for instructing light emission of the organic electroluminescence element; and a capacitance type touch detection circuit unit for detecting a self-capacitance change of the anode electrode or a self-capacitance change of the bezel electrode. The organic electroluminescence module according to claim 1.
The light emission period of the organic electroluminescence panel controlled by the light emitting element drive circuit unit is separated from the touch sensing period controlled by the touch detection circuit unit, and the electric capacitance of the organic electroluminescence panel is not detected in the touch sensing period. The organic electroluminescence module according to claim 2, wherein at least one of the pair of electrodes is in a floating potential state.
A smart device comprising the organic electroluminescence module according to any one of claims 1 to 3,
A smart device, wherein the organic electroluminescence module is disposed on a main display surface side, a back surface side, or a side surface side.