Organic EL device and electronic apparatus

An organic EL device includes an element substrate above which an organic EL element is provided; a counter substrate arranged so as to face the element substrate; a sealing layer arranged between the organic EL element and the counter substrate, and having at least a first sealing layer made from an inorganic material, a planarized second sealing layer, and a third sealing layer formed from an inorganic material; and a filler arranged between the sealing layer and the counter substrate, in which the counter substrate is arranged in a region spaced by a predetermined gap from any end portion of the element substrate, the filler is arranged so as to protrude to the gap from between the element substrate and the counter substrate, and the end portion of the second sealing layer is covered by the filler.

BACKGROUND

1. Technical Field

The present invention relates to an organic EL device and an electronic apparatus.

2. Related Art

The organic electroluminescence (EL) device has a structure in which a light emitting layer formed from a light emitting material is interposed between an anode (pixel electrode) and a cathode (counter electrode). The organic EL devices are adhered to an element substrate and a counter substrate via a sealing material and a filler. A connection terminal that electrically connects the organic EL device and an external apparatus is provided on the element substrate.

JP-A-2014-89803 discloses an organic EL device with a structure in which an end portion of the element substrate and an end portion of the counter substrate are arranged at approximately the same position in plan view, except for a region in which the connection terminal is arranged.

However, in a case where a plurality of organic EL devices is formed at the same time on a large substrate (motherboard), when formed so that the end portions of the element substrate and the counter substrate have substantially the same position, a problem arises of the filler protruding to the neighboring organic EL device side.

Meanwhile, when formed so that the end portion of the counter substrate is further to the inside (so as to become smaller) in plan view than the end portion of the element substrate, a problem arises of the part of the organic EL device to be protected (for example, a sealing film) protrudes. When the part to be protected is to be protected by the counter substrate, a problem arises of the non-display region becoming larger.

SUMMARY

The invention can be realized in the following forms or application examples.

Application Example 1

According to this application example, there is provided an organic EL device, including a first substrate on which an organic EL element is provided; a second substrate arranged so as to face the first substrate; a sealing layer arranged between the organic EL element and the second substrate, and having at least a first sealing layer made from an inorganic material, a planarized second sealing layer, and a third sealing layer formed from an inorganic material; and a filler arranged between the sealing layer and the second substrate, in which the second substrate is arranged in a region spaced by a predetermined gap from any end portion of the first substrate, the filler is arranged so as to protrude to the gap from between the first substrate and the second substrate, and the end portion of the second sealing layer is covered by the filler.

According to the application example, since the second sealing layer is covered by the filler layer and the second substrate in plan view, the sealing layer can be protected from external impact, and it is possible to suppress breakage of the second sealing layer. Thus, the infiltration of moisture and the like into the organic EL element via the sealing layer can be suppressed. Since the end portion of the second substrate is arranged so as to be further to the inside (so as to become smaller) than the end portion of the first substrate, the protrusion amount of the filler to the end portion side of the substrate can be suppressed, and the non-display region becoming excessively large may be suppressed. Thus, the filler protruding into the side of the neighboring organic EL device as in a case of forming with a large substrate (motherboard) can be suppressed.

Application Example 2

In the organic EL device according to the application example, it is preferable that the end portion of the second sealing layer is arranged further to the inside than the end portion of the second substrate in plan view.

According to the application example, since the end portion of second sealing layer is arranged so as to be further to the inside than the end portion of the second substrate, the amount that the filler that covers the second sealing layer protrudes from end portion of the second substrate to the outside may be suppressed. Thus, the filler protruding into the region of the neighboring organic EL device as in a case of forming with a large substrate (motherboard) can be suppressed.

Application Example 3

In the organic EL device according to the application example, it is preferable that a distance from the end portion of the filler to the end portion of the second sealing layer is longer than the thickness of the filler between the second sealing layer and the second substrate.

According to the application example, regarding the filler that covers the second sealing layer, since the distance from the end portion of the second sealing layer to the end portion of the filler is longer than the thickness of the filler between the second sealing layer and the second substrate, it is possible to protect the sealing layer from external impact by means of the filler.

Application Example 4

In the organic EL device according to the application example, it is preferable that the second substrate is formed with a taper to the outer edge of the side on which the filler is arranged.

According to the application example, since the taper is formed on the outer edge of the filler side on the second substrate, it is possible for the part where the second substrate comes in contact with the filler to be further to the inside than the end portion side of the second substrate. Thus, the amount that the filler protrudes from the end portion of the second substrate to the outside can be suppressed, and it is possible for the filler protruding to the region of the neighboring organic EL device, as in a case of forming with a large substrate (motherboard) to be suppressed.

Application Example 5

In the organic EL device according to the application example, it is preferable that the taper is formed at a position not overlapping the second sealing layer in plan view.

According to the application example, since the taper is formed in a region not overlapping the second sealing layer, it is possible to cover the second sealing layer with the filler, and along therewith, to keep the end portion of the filler so as to be between the end portion of the second sealing layer and the end portion of the second substrate. Thus, the filler can be made not to spread excessively from the end portion of the second sealing layer to the outside, and it is possible to prevent the filler from protruding to the region of a neighboring organic EL device.

Application Example 6

In the organic EL device according to the application example, it is preferable that a display region is further included at a region that includes the organic EL element in plan view, and the distance from an edge of the display region to an end portion of the second sealing layer is longer than the distance from an end portion of the second sealing layer to the end portion of the second substrate.

According to the application example, since the distance from the end portion of the second sealing layer to the end portion of the second substrate is shorter (thinner), it is possible for the end portion of the second sealing layer being excessively covered with the filler to be suppressed. Thus, the filler can be prevented from protruding into the region of a neighboring organic EL device.

Application Example 7

In the organic EL device according to the application example, it is preferable that a projection is provided on the third sealing layer and further to the outside than the second sealing layer in plan view.

According to the application example, by providing the projection, it is possible for excessive filler protruding (flowing) to the neighboring region when the end portion of the second sealing layer is covered by the filler to be suppressed. Application Example 8

In the organic EL device according to the application example, it is preferable that the projection is formed by any material of a color filter, a barrier layer arranged between the color filters, and an overcoating layer.

According to the application example, by forming the projection using the above materials, it is possible to form the projection without adding a new manufacturing process.

Application Example 9

According to this application example, there is provided an electronic apparatus, including the above-described organic EL device.

According to the application example, since the organic EL device is provided, it is possible to provide a highly reliable electronic apparatus.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Below, specific embodiments of the invention will be described according to the drawings. The drawings used are displayed after enlarging or reducing as appropriate in order that the portions described are recognizable.

Moreover, in the following forms, for example, a case where “on a substrate” is disclosed indicates a case where arrangement is performed so as to contact the top of the substrate, a case where arrangement is performed via another constituent component on top of the substrate, or a case where a portion is arranged so as to contact the top of the substrate, and a portion is arranged via the other constituent component.

First Embodiment

Organic EL Device

First, the organic electroluminescence (EL) device of the embodiment will be described with reference toFIGS. 1 to 3.FIG. 1is an equivalent circuit diagram showing an electrical configuration of the organic EL device of the first embodiment;FIG. 2is a schematic plan view showing the configuration of the organic EL device of the first embodiment; andFIG. 3is a schematic plan view showing a pixel arrangement in the first embodiment.

As shown inFIG. 1, the organic EL device100of the embodiment includes plurality of scanning lines12and a plurality of data lines13that intersect one another, and a plurality of power lines14arranged in a line for each of the plurality of data lines13. The organic EL device includes a scanning line driving circuit16to which the plurality of scanning lines12is connected, and a data line driving circuit15to which the plurality of data lines13is connected. A plurality of sub-pixels18that is arranged in a matrix form corresponding to each intersection of the plurality of scanning lines12and the plurality of data lines13is included.

The sub-pixels18include an organic EL element30that is a light emitting element and a pixel circuit20that controls the driving of the organic EL element30.

The organic EL element30includes a pixel electrode31that functions as an anode, a counter electrode33that functions as a cathode, and a functional layer32that includes an organic light emitting layer provided between the pixel electrode31and the counter electrode33. It is possible for such an organic EL element30to be electrically denoted as a diode.

The pixel circuit20includes a switching transistor21, a storage capacitor22, and a driving transistor23. It is possible for the two transistors21and23to be configured using an n-channel or p-channel thin film transistor (TFT) or a MOS transistor.

The gate of the switching transistor21is connected to the scanning line12, one of the source or drain is connected to the data line13, and the other of the source and drain is connected to the gate of the driving transistor23.

One of the source or drain of the driving transistor23is connected to the pixel electrode31of the organic EL element30, and the other of the source and drain is connected to the power line14. The storage capacitor22is connected between the gate of the driving transistor23and the power line14,

When the scanning line12is driven and the switching transistor21thereby enters an on state, and the potential based on the image signal supplied from the data line13at this time is held by the storage capacitor22via the switching transistor21.

The on and off states of the driving transistor23are determined according to the potential of the storage capacitor22, that is, the gate potential of the driving transistor23. When the driving transistor23is in the on state, a current with an amount according to the gate potential flows from the power line14to the functional layer32interposed between the pixel electrode31and the counter electrode33via the driving transistor23. The organic EL element30emits light according to the current amount flowing to the functional layer32.

The configuration of the pixel circuit20is not limited thereto. For example, a light emission control transistor that controls the electrical connection between the pixel electrode31and the driving transistor23and that is provided between the pixel electrode31and the driving transistor23may be provided.

As shown inFIG. 2, the organic EL device100includes an element substrate10as a first substrate, and a counter substrate41as a second substrate arranged so as to face the element substrate10. A display region E1(displayed by a dotted line in the drawing), and a dummy region E2(displayed with the double dashed line in the drawing) outside the display region E1are provided on the element substrate10. The outside of the dummy region E2is a non-display region,

The sub-pixels18are arranged in a matrix form in the display region E1. The sub-pixel18is provided with the organic EL element30that is the above-described light emitting element, and is configured so that emitted light with any color from red (R), green (G), and blue (B) is obtained according to the operation of the switching transistor21and the driving transistor23.

In the embodiment, the sub-pixels18from which the same color of light emission is obtained are arranged in a first direction, and the sub-pixels18from which different colors of light emission is obtained are arranged in a second direction that intersects (orthogonal to) the first direction, a so-called striped method of sub-pixel arrangement18. Below, description is made with the first direction as the Y direction and the second direction as the X direction. The arrangement of the sub-pixels18on the element substrate10is not limited to the stripe format, and may be a mosaic format or a delta format.

A peripheral circuit for mainly causing the organic EL element30of each sub-pixel18to emit light is provided in the dummy region E2. As shown inFIG. 2, a pair of scanning line driving circuits16is provided extending in the Y direction at positions interposing the display region E1in the X direction. A scanning circuit17is provided at a position along the display region E1between the pair of scanning line driving circuits16.

A wiring layer29extending in the Y direction along the pair of scanning line driving circuits16and in the X direction along the scanning circuit17, and arranged so as to surround the dummy region E2is included on the element substrate10. The counter electrode33of the organic EL element30is formed as a shared cathode across the plurality of organic EL elements30, that is, the plurality of sub-pixels18. The counter electrode33is formed so as to reach from the display region E1to the non-display region, and is electrically connected to the wiring layer29in the non-display region.

The element substrate10is larger than the counter substrate41, and a plurality of connection terminals101for achieving electrical connection with external driving circuits is arranged in the X direction on one edge portion (edge portion between the end portion of the substrate10and the dummy region E2in the lower portion of the drawing; below, referred to as terminal portion lit) protruded from the counter substrate41in the Y direction.

A flexible circuit substrate (FPC)105is connected to the plurality of connection terminals101. A driving IC110is mounted to the FPC105. The driving IC110includes the above-described data line driving circuit15.

The FPC105includes an input terminal102connected to the input side of the driving IC110via a wiring, and an output terminal (not shown in the drawings) connected to the output side of the driving IC110via a wiring.

The data line13and the power line14of the element substrate10side are electrically connected to the driving IC110via the connection terminal101and the FPC105. The wiring connected to the scanning line driving circuit16and the scanning circuit17is electrically connected to the driving IC110via the connection terminal101and the FPC105.

The counter electrode33as a shared cathode is also electrically connected to the driving IC110via the wiring layer29and the connection terminal101, and the FPC105. Accordingly, any of the plurality of connection terminals101arranged on the terminal portion lit is supplied with a control signal, driving potential (VDD) or the like from the driving IC110.

It is possible for a know method to be used as the method for electrically connecting the plurality of connection terminals101on the element substrate10side and the output terminal on the FPC105side, and examples include a method using a thermoplastic anisotropic conductive film and a method using a thermosetting anisotropic adhesive.

Next, the configuration of the sub-pixel18and the planar arrangement thereof will be described with reference toFIG. 3. The organic EL device100in the embodiment is configured by combining an organic EL element30from which white light emission is obtained, and a color filter36that includes red (R), green (G), and blue (B) colored layers.

As shown inFIG. 3, the sub-pixel18R from which red (R) light emission is obtained, the sub-pixel18G from which green (G) light emission is obtained, and the sub-pixel18B from which blue (B) light emission is obtained are arranged in parallel in this order in the X direction. The sub-pixels18from which the same color of light emission is obtained are arranged in parallel in the Y direction. The configuration performs display with the three sub-pixels18R,18G, and18B arranged in parallel in the X direction as one pixel19.

In the embodiment, the arrangement pitch of the sub-pixels18R,18G, and18B in the X direction is less than 5 μm. The sub-pixels18R,18G, and18B are arranged spaced with a gap of 0.5 μm to 1.0 μm in the X direction. The arrangement pitch of the sub-pixels18R,18G, and18B in the Y direction is less than approximately 10 μm.

The pixel electrodes31in the sub-pixels18are substantially rectangular, and the long direction thereof is arranged along the Y direction. The pixel electrodes31are also referred to as the pixel electrodes31R,31G, and31B corresponding to the light emission color.

An insulating barrier28is formed while covering the outer edge of each pixel electrode31R,31G, and31B. Thus, the opening portion28ais formed on each pixel electrode31R,31G, and31B, and the pixel electrodes31R,31G, and31B each contact the functional layer32in the opening portion28aprovided in the barrier28. The planar shape of the opening portion28ais also a substantially rectangular.

The wording substantially rectangular includes a rectangle, a shape in which the corners of a rectangle are rounded, a shape in which the short edge side of the rectangle is a circular arc, and the like.

The red (R) colored layer36R of the color filter36is formed so as to overlap the plurality of pixel electrodes31R arranged in parallel in the Y direction. The green (G) colored layer36G is formed so as to overlap the plurality of pixel electrodes31G arranged in the Y direction. The blue (B) colored layer36B is formed so as to overlap the plurality of pixel electrodes31B arranged in the Y direction. That is, the different colors of colored layer36R,36G, and36B are formed in a striped form extending in the Y direction, and formed alternately contacting in the X direction.

Next, the structure of the sub-pixels of the organic EL device100will be described with reference toFIG. 4.FIG. 4is a schematic cross-sectional view showing the structure of the organic EL device taken along line IV-IV inFIG. 3.FIG. 4shows the structure of the sub-pixel18in the display region E1.

As shown inFIG. 4, the organic EL device100is provided with a base material11, and an element substrate10that includes a pixel circuit20, organic EL elements30, a sealing layer34that seals the plurality of organic EL elements30, and a color filter36formed in this order on the base material11. A counter substrate41is provided as a second substrate arranged facing the element substrate10.

The counter substrate41is formed from a transparent substrate such as glass, and is arranged facing the element substrate10via the filler42to protect the color filter36formed on the sealing layer34on the element substrate10.

The emitted light from the functional layer32of the sub-pixels18R,18G, and18B is reflected by a reflection layer25, described later, and is extracted from the counter substrate41side while passing though the color filter36. That is, the organic EL device100is a top emission-type light-emitting device.

It is possible to use a transparent substrate such as glass or a non-transparent substrate such as silicon or ceramic as the base material11, because the organic EL device100is a top emission-type. Below, an example of using a thin film transistor as the pixel circuit20will be described.

A first insulating film27ais formed covering the surface of the base material11. A semiconductor layer23aof the driving transistor23in the pixel circuit20is formed on the first insulating film27a. A second insulating film27bthat functions as a gate insulating film is formed covering the semiconductor layer23a. A gate electrode23gis formed at a position facing the channel region of the semiconductor layer23avia the second insulating film27b. A first interlayer insulating film24is formed with a film thickness of 300 nm to 2 μm covering the gate electrode23g.

The first interlayer insulating film24is subjected to a planarizing treatment so as to eliminate roughness of the surface arising due to covering the driving transistor23and the like of the pixel circuit20. Contact holes that pass through the second insulating film27band the first interlayer insulating film24are formed corresponding to each of the source region23sand the drain region23dof the semiconductor layer23a.

A conductive film is formed so as to embed the contact holes, and an electrode and a wiring connected to the driving transistor23are formed while being patterned. The conductive film is formed using optically reflective aluminum or an alloy or the like of aluminum and Ag (silver) or Cu (copper), and reflection layers25are independently formed for each sub-pixel18by subjecting these to patterning.

InFIG. 4, although not shown in the drawings, a switching transistor21and a storage capacitor22in the pixel circuit20are also formed on the base material11.

The second interlayer insulating film26is formed with a thickness of 10 nm to 2 μm covering the reflection layer25and the first interlayer insulating film24. Thereafter, the contact holes for electrically connecting the pixel electrode31and the driving transistor23are formed passing through the second interlayer insulating film26.

It is possible for an oxide or a nitride of silicon or an oxynitride silicon to be used as the material that configures the first insulating film27a, the second insulating film27b, the first interlayer insulating film24, and the second interlayer insulating film26.

The conductive film is formed covering the second interlayer insulating film26so as to embed the contact hole formed in the second interlayer insulating film26, and the pixel electrodes31(31R,31G,31B) are formed by patterning the conductive film. The pixel electrode31(31R,31G,31B) is formed using a transparent conductive film such as indium tin oxide (ITO). In a case where the reflection layer25is not provided for each sub-pixel18, the pixel electrodes31(31R,31G,31B) may be formed using aluminum or an alloy thereof having optical reflectivity.

A barrier28is formed while covering the outer edge portion of each pixel electrode31R,31G, and31B. Thereby, the opening portion28ais formed on the pixel electrodes31R,31G, and31B. The barrier28is formed using an acrylic light sensitive resin, so as to partition each of the pixel electrodes31R,31G, and31B at a height of approximately 1 μm.

In the embodiment, although the barrier28formed from a light sensitive resin is formed in order for each of the pixel electrodes31R,31G, and31B to enter a mutually insulated state, each of the pixel electrodes31R,31G, and31B may be partitioned using an inorganic insulating material such as silicon oxide.

The functional layer32is formed using a vapor phase process such as a vacuum deposition method or an ion plating method so as to contact each pixel electrode31R,31G, and31B, and the surface of the barrier28is covered with the functional layer32. Since the functional layer32may be formed in a region partitioned by a barrier28without the need for the functional layer32to cover the entire surface of the barrier28, it is not necessary for the apex portion of the barrier28to be covered by the functional layer32.

The functional layer32includes a hole injection layer, a hole transporting layer, an organic light emission layer and an electron transporting layer. In the embodiment, the functional layer32is formed by forming and layering each of the hole injection layer, the hole transporting layer, the organic light emitting layer, the electron transporting layer in order on the pixel electrode31using a vapor phase process. The layer configuration of the functional layer32is not limited thereto, and an intermediate layer that controls the movement of holes and electrodes that are the carrier may be included.

The organic light emitting layer may be formed in a configuration from which white light emission is obtained, and it is possible to employ a configuration in which an organic light emitting layer from which red light emission, an organic light emitting layer from which green light emission is obtained, and an organic light emitting layer from which blue light emission is obtained are combined.

The counter electrode33as a shared cathode is formed covering the functional layer32. The counter electrode33is formed by forming an alloy of Mg and Ag with a film thickness to an extent at which optical transparency and optical reflectivity are obtained (for example, 10 nm to 30 nm). Thereby, a plurality of organic EL elements30is completed.

By forming the counter electrode33in a state of having optical transparency and optical reflectivity, an optical resonator may be configured between the reflection layer25and the counter electrode33for each of the sub-pixels18R,18G, and18B.

Next, the sealing layer34that covers the plurality of organic EL elements30so that water, oxygen and the like do not infiltrate is formed. The sealing layer34of the embodiment includes a first sealing layer34a, a second sealing layer34b, and a third sealing layer34clayered in order from the counter electrode33side.

It is preferable to use an inorganic material having optical transparency and excellent gas barrier properties such as silicon oxynitride (SiON) as the first sealing layer34aand the third sealing layer34c.

Examples of the method of forming the first sealing layer34aand the third sealing layer34cinclude a vacuum deposition method. High gas barrier properties can be realized by making the film thickness of the first sealing layer34aand the third sealing layer34cthick; however, on the other hand, cracks easily arise due to expansion and compression. Accordingly, it is preferable to control the film thickness to approximately 200 nm to 400 nm, and, in the embodiment, high gas barrier properties are realized by overlapping the first sealing layer34aand the third sealing layer34cwith the second sealing layer34binterposed.

It is possible for the second sealing layer34bto be formed using an epoxy resin or a coating-type inorganic material (such as silicon oxide) with excellent thermal stability. If the second sealing layer34bis formed by coating with a printing method such as screen printing, and fixed amount discharge method, it is possible to planarize the surface of the second sealing layer34b. That is, it is possible for the second sealing layer34bto be caused to also function as a planarizing layer that alleviates the roughness of the surface of the first sealing layer34a. The thickness of the second sealing layer34bis 1 μm to 5 μm.

Colored layers36R,36G, and36B are formed corresponding to each color of the sub-pixels18R,18G, and18B on the sealing layer34. Examples of the method of forming a color filter36that includes the colored layers36R,36G, and36B include a method of forming a light sensitive resin layer by applying a light sensitive resin material that includes a coloring material, and exposing and developing the resin layer with a photolithography method. The film thickness of the colored layers36R,36G, and36B may be the same for any color, or at least one color may be made different to the other colors.

The element substrate10and the counter substrate41are arranged so as to face via the filler42formed from a transparent resin material or the like. Possible examples of the transparent resin material include resin materials such as urethane-, acrylic-, epoxy-, and polyolefin-based resin materials.

Overall Structure of Organic EL Device of First Embodiment

Next, the overall structure of the organic EL device of the first embodiment will be described with reference toFIG. 5.FIG. 5is a schematic cross-sectional view of the organic EL device shown inFIG. 2taken along the line V-V. Because the outer peripheral portion in the organic EL element is mainly described, a detailed depiction of the pixel circuit20, the organic EL element30and the like will be omitted.

As shown inFIG. 5, the organic EL device100of the first embodiment, as described above, is provided with a pixel circuit layer20ain which a driving transistor23or the like is formed on the base material11that configures the element substrate10. The functional layer32having an organic light emitting layer and the like is provided on the pixel circuit layer20a. The functional layer32is covered by the counter electrode33that functions as a cathode.

The first sealing layer34athat configures the sealing layer34is formed across the entire counter electrode33and base material11on the counter electrode33. The second sealing layer34bis formed on the first sealing layer34a. The end portion34b1of the second sealing layer34bis arranged so as to be further to the inside (so as to become smaller) than the end portion41aof the counter substrate41in plan view. In other words, the second sealing layer34bis formed so as to be covered by the counter substrate41in plan view.

The third sealing layer34cis formed over the entire second sealing layer34band base material11on the second sealing layer34b. The color filter36is formed so as to include the region of the functional layer32in plan view on the third sealing layer34c. The filler42is provided on the color filter36. The end portion42aof the filler42is arranged so as to be between the end portion34b1of the second sealing layer34band the end portion11aof the base material11.

The thickness of the filler42is 10 μm. The preferable range is approximately 2 μm to 30 μm. When the filler42is thin, there is concern of foreign materials coming in contact with and damaging the sealing layer34. Whereas, when the filler42is thick, the organic EL device100becomes larger. Furthermore, there is concern of optical loss occurring when the thickness of the filler42is thick.

The counter substrate41is arranged on the filler42. The end portion41aof the counter substrate41is preferably arranged further to the inside than the end portion11aof the base material11in plan view so that the filler42does not protrude from the end portion11aof the base material11in plan view.

As long as the distance from the end portion42aof the filler42to the end portion34b1of the second sealing layer34bis approximately 0.1 mm to 0.5 mm, it is possible to reliably protect the second sealing layer34b. The distance (also referred to as thickness) from the end portion42aof the filler42to the end portion34b1of the second sealing layer34bis longer than the thickness of the filler42. It is preferable that the distance from the end portion42aof the filler42to the end portion34b1of the second sealing layer34bdiffers by one digit or more from the thickness of the filler42.

The width by which the filler42protrudes from the counter substrate41is approximately 10 to 300 μm. The width can be adjusted according to the coating amount and thickness of the pressing force of the filler42.

The distance from the display region to the end portion34b1of the second sealing layer34bis 0.5 mm to 1.0 mm. The distance from the end portion34b1of the second sealing layer34bto the end portion41aof the counter substrate41is approximately 0.3 mm to 0.8 mm.

That is, the end portion34b1of the second sealing layer34bis arranged on the display region side. In so doing, compared to a case where the end portion34b1of the second sealing layer34bis arranged on the end portion41aof the counter substrate41side, it is possible to reliably protect the second sealing layer with the filler42and the counter substrate41.

By doing so, since the second sealing layer34bthat serves a function as a planarizing layer that configures the sealing layer34is covered by the counter substrate41in plan view, it is possible to prevent the second sealing layer34bfrom breaking due to contact from the outside. In so doing, it is possible to suppress infiltration of moisture from the sealing layer34, thereby contributing to damage of the organic EL element30.

Additionally, since the end portion41aof the counter substrate41is arranged so as to be further to the inside than the end portion11aof the base material11, it is possible for the filler42protruding to the neighboring organic EL device100side as in a case of forming the plurality of organic EL devices100at the same time on a large substrate11W (refer toFIG. 7A) to be suppressed without the display region spreading excessively. It is possible to provide a small organic EL device100.

Method of Manufacturing Organic EL Device

Next, the method of manufacturing the organic EL device of the first embodiment will be described with reference toFIGS. 6 to 7B.FIG. 6is a flowchart showing the method of manufacturing the organic EL device.FIGS. 7A and 7Bare schematic view showing a portion of the manufacturing process from the method of manufacturing an organic EL device.

In the embodiment, an example of forming the plurality of organic EL devices100at the same time on a large substrate11W (motherboard) will be described.FIG. 7Ais a schematic plan view showing a large substrate11W to which the plurality of organic EL devices100is attached.FIG. 7Bis a schematic cross-sectional view of the large substrate shown inFIG. 7Ataken along line VIIB-VIIB.

First, the element circuit layer20aincluding the pixel circuit20or the like, the functional layer32including the organic EL elements30and the like, and the counter electrode33and the like are formed on the base material11, It is possible for the method of forming thereof to perform manufacturing using a known method.

Next, as shown inFIG. 6, in step S11, the sealing layer34is formed. Specifically, as shown inFIG. 7B, the first sealing layer34ais formed so as to cover the entire counter electrode33and the base material11. Example of the method of forming the first sealing layer34ainclude a method of vacuum depositing an oxynitride of silicon (SiON).

Next, the second sealing layer34bthat covers the first sealing layer34ais formed. As a method of forming the second sealing layer34b, the second sealing layer34bformed from an epoxy resin is formed by using a solution including an epoxy resin having transparency and a solvent of the epoxy resin, and applying and drying the solution with a printing method or a spin coating method.

The second sealing layer34bis not limited of being formed using an organic material such as an epoxy resin, and a silicon oxide film may be formed as the second sealing layer34bby applying a coating-type inorganic material with a printing method, and drying and baking the applied inorganic material.

The third sealing layer34cthat covers the second sealing layer34bis formed. Examples of the method of forming the third sealing layer34cinclude a method of vacuum depositing an oxynitride of silicon (SiON) similarly to the first sealing layer34a.

Next, in the step S12, the color filter36(36R,36G,36B) is formed. Specifically, the known method forms each colored layer by forming a light sensitive resin layer by applying and drying light sensitive resins that include each coloring material with a spin coating method, and exposing and developing the light sensitive resin layer.

Next, in the step S13, the filler42is applied. Specifically, the transparent resin material having adhesiveness is applied so as to cover the color filter36. The transparent resin material is, for example, a thermosetting epoxy resin.

Next, in the step S14, the counter substrate41is adhered. Specifically, the counter substrate41is arranged at a predetermined position facing the base material11coated with the filler42, and the counter substrate41is pressed to the base material11side. In so doing, the element substrate10and the counter substrate41are adhered.

Next, in the step S15, as shownFIG. 7A, by cutting the large substrate11W along a virtual scribe line SL between element substrate10, individual organic EL devices100are extracted. Examples of the cutting method include an incision scribing method using an ultra-hard tip or a diamond tip and a dicing method using a diamond blade.

Through manufacturing in this way, as shown inFIG. 7B, it is possible to suppress the filler42protruding to the neighboring organic EL device100side.

Electronic Apparatus

Next, the electronic apparatus according to the embodiment will be described with reference toFIG. 8.8is a schematic view showing a configuration of a head mounted display (HMD) as an electronic apparatus.

As shown inFIG. 8, the head mounted display1000is provided with the above-described organic EL device100, and is provided with main body section115having a glasses shape, and a controller200having a size approximately able to be held in the hand of a user.

The main body section115and the controller200are connected to be able to communicate in a wired manner or wirelessly. In the embodiment, the main body section115and the controller200are connected to be able to communicate with a cable300. The main body section115and the controller200communicate image signals or control signals via the cable300.

The main body section115is provided with a right eye display unit115A and a left eye display unit115B. The right eye display unit115A is provided with an image forming unit120A that forms image light of a right eye image. The left eye display unit115B is provided with an image forming unit120B that forms image light of left eye image.

The image forming unit120A is accommodated in temple part (right side) of the glasses in the glasses-type main body section115Meanwhile, the image forming unit120B is accommodated in temple part (left side) of the glasses in the glasses-type main body section115.

A viewing portion131A having optical transparency is provided in the main body section115. The viewing portion131A radiates image light of the right eye image toward the right eye of the user. In the head mounted display1000, the viewing portion131A has optical transparency, and the periphery is visible via the viewing portion131A.

A viewing portion131B having optical transparency is provided in the main body section115. The viewing portion131B radiates image light of the left eye image toward the left eye of the user. In the head mounted display1000, the viewing portion131E has optical transparency, and the periphery is visible via the viewing portion131B.

The controller200includes an operation unit210and operation buttons220. The user performs operation input with respect to the operation unit210or the operation button unit220of the controller200, and performs instruction to the main body section115.

It is possible to use various electronic apparatuses, in addition to the head mounted display1000, such as a heads up display (HUD), a projector, a smartphone, an electrical view finder (EVF), a mobile telephone, a mobile computer, a digital camera, a digital video camera, a vehicle-mounted apparatus, and a lighting apparatus as the electronic apparatus to which the organic EL device100is mounted.

As described in detail above, according to the organic EL device100and electronic apparatus of the first embodiment, the effects shown below are obtained.

(1) According to the organic EL device100of the first embodiment, since the second sealing layer34bis covered by the filler42and the counter substrate41in plan view, the sealing layer34(second sealing layer34b) can be protected from external impact, and it is possible to suppress breakage of the second sealing layer34b. Thus, it is possible for the infiltration of moisture and the like into the organic EL element30via the sealing layer34to be suppressed. Since the end portion41aof the counter substrate41is arranged so as to be further to the inside (so as to become smaller) than the end portion11aof the base material11that configures the element substrate10, the amount that the filler42protrudes to the end portion41aside of the counter substrate41can be suppressed, and it is possible for the non-display region becoming excessively large to be suppressed. Thus, the filler42protruding into the region of the neighboring organic EL device100as in a case of forming with a large substrate (motherboard)11W can be suppressed.

(2) According to the organic EL device100of the first embodiment, in the filler42that covers the second sealing layer34b, since the thickness from the second sealing layer34bto the counter substrate41is thinner than the thickness from the end portion of the34b1of the second sealing layer34bto the end portion42aof the filler42, it is possible to reduced optical loss.

(3) According to the organic EL device100of the first embodiment, since the distance from the end portion34b1of the second sealing layer34bto the end portion41aof the counter substrate41is shorter compared to the distance from the end portion of the34b1of the second sealing layer34bto the end portion42a, it is possible for the end portion34b1of the second sealing layer34bbeing excessively covered by the filler42to be suppressed. Thus, the filler42can be prevented from protruding into the region of the neighboring organic EL device100.

(4) According to the electronic apparatus of the first embodiment, since the organic EL device100is provided, it is possible to provide a highly reliable electronic apparatus.

Second Embodiment

Organic EL Device

Next, the organic EL device of the second embodiment will be described with reference toFIG. 9.FIG. 9is a schematic cross-sectional view showing a structure of the organic EL device of the second embodiment.

Compared to the organic EL device100of the above-described first embodiment, the organic EL device111of the second embodiment differs in the shape of the counter substrate141and the other parts are substantially the same. Therefore, in the second embodiment, the parts different to the first embodiment will be described in detail, and the other overlapping parts will not be described, as appropriate.

As shown inFIG. 9, a taper141aof the organic EL device111of the second embodiment is formed on the outer peripheral edge of the filler42side on the counter substrate141. Specifically, the region in which the taper141ais formed is preferably formed at a position (further to the outside than the second sealing layer34bin plan view) at which the sealing layer34does not overlap the second sealing layer34bin plan view.

By forming the taper141ain this way, the end portion42aof the filler42can be kept between the end portion41aof the counter substrate41and the end portion34b1of the second sealing layer34b. In other words, the coating state of the filler42is easily controlled. Thus, it is possible for the filler42to not excessively spread, and it is possible for the filler42to no protrude to the region of the neighboring organic EL device111.

By providing the taper141a, it is possible to suppress the corners being cut thereby generating foreign materials as in a case where the outer peripheral edge of the counter substrate141has corners (state before tapering). Since the taper141ais formed at a position not overlapping the second sealing layer34bin plan view, it is possible for damage being imparted to the second sealing layer34bby the edge of the taper141ato be suppressed.

Even in case where the planar size of the counter substrate41is formed to be large compared to the first embodiment, since the taper141ais formed, it is possible for the filler42protruding further to the outside than the end portion41aof the counter substrate41to be suppressed.

The thickness of the filler42is 10 μm, similarly to the first embodiment. The preferable range is approximately 2 μm to 30 μm. The distance from the display region to the end portion34b1of the second sealing layer34bis 0.5 mm to 1.0 mm. The distance from the end portion34b1of the second sealing layer34bto the end portion41aof the counter substrate41is approximately 0.3 mm to 0.8 mm.

As described in detail above, according to the organic EL device111of the second embodiment, the effects shown below are obtained.

(5) According to the organic EL device111of the second embodiment, since the taper141ais formed on the outer edge of the counter substrate41on the filler42side, it is possible for the part that contacts the counter substrate41and the filler42to be further to the inside than the end portion41aof the counter substrate41. Thus, the amount that the filler42protrudes from the end portion41aof the counter substrate41to the outside can be suppressed, and it is possible for the filler42protruding to the region of the neighboring organic EL device111, as in a case of forming with a large substrate (motherboard)11W to be suppressed. It is possible to control the position of the filler42by the taper141a.

(6) According to organic EL device111of the second embodiment, since the taper141ais formed in a region not overlapping the second sealing layer34b, it is possible to cover the second sealing layer34bwith the filler42, and along therewith, to keep the end portion42aof the filler42so as to be between the end portion34b1of the second sealing layer34band the end portion41aof the counter substrate41. Thus, the filler42can be made to not spread excessively from the end portion34b1of the second sealing layer34bto the outside, and it is possible to prevent the filler42from protruding to the region of a neighboring organic EL device111.

(7) According to the organic EL device111of the second embodiment, by providing the taper141a, it is possible for the corners being cut to be suppressed, thereby generating foreign materials as in a case where the outer peripheral edge of the counter substrate141has corners (state before tapering). Additionally, since the taper141ais formed at a position not overlapping the second sealing layer34bin plan view, it is possible for damage being imparted to the second sealing layer34bby the edge of the taper141ato be suppressed.

Third Embodiment

Organic EL Device

Next, the organic EL device of the third embodiment will be described with reference toFIG. 10.FIG. 10is a schematic cross-sectional view showing a structure of the organic EL device of the third embodiment.

Compared to the organic EL device100of the above-described first embodiment, the organic EL device112of the third embodiment differs in the parts having the projection36abetween the end portion11aof the base material11and the end portion42aof the filler42in plan view, and the other parts are substantially the same. Therefore, in the third embodiment, the parts different to the first embodiment will be described in detail, and the other overlapping parts will not be described, as appropriate.

As shown inFIG. 10, the counter substrate41of the organic EL device112of the third embodiment is arranged so as to cover the second sealing layer34bin plan view, as described above. Further, a projection36athat is a characteristic part of the third embodiment is formed on the outer edge portion on the third sealing layer34c.

The projection36ais formed with the same material as the material of any of the color filters36. By being formed with the same material, it is possible to form the projection36aat the same time as the process of manufacturing the color filter36. Thus, it is possible to manufacture the projection36awithout adding a new manufacturing process.

In this way, by forming the projection36a, when the filler42is applied on the color filter36and when the counter substrate41is adhered, it is possible for the filler42protruding to the region of the neighboring organic EL device112to be suppressed. As a result, the filler42formed so as to cover the sealing layer34can be kept between the end portion11aof the base material11and the end portion34b1of the second sealing layer34bthat configures the sealing layer34in plan view.

As described in detail above, according to the organic EL device112of the third embodiment, the effects shown below are obtained.

(8) According to the organic EL device112of the third embodiment, by providing the projection36aon the third sealing layer34cand further to the outside than the end portion34b1of the second sealing layer34b, when the end portion34b1of the second sealing layer34bis covered with the filler42, it is possible for excess filler42protruding (flowing) to the neighboring regions to be suppressed. In other words, it is possible to keep back the filler42. Thus, it is possible to provide an organic EL device112with a reduced size.

The aspects of the invention are not limited to the above-described embodiments and are able to be appropriately changed within a range not departing from the gist or spirit of the invention read from the aspects and the entire specification, and are included in the technical range of the aspects of the invention. It is possible to execute the embodiments in the following manner.

Modification Example 1

As in the above-described third embodiment, the material of the projection36ais not limited to forming with the same material as the color filter36, and the following materials may be used.FIG. 11is a schematic cross-sectional view showing a structure of an organic EL device113of a modification example. The organic EL device113shown inFIG. 11exhibits a cross-sectional structure of a pixel region.

As shown inFIG. 11, the insulating layer35of the organic EL device113of the modification example is formed as a barrier layer between each colored layer36R,36G, and36B that configure the color filter36. Specifically, the insulating layer35is formed in a stripe form. The cross-sectional shape of the insulating layer35is trapezoidal shape in which the bottom surface that contacts the sealing layer34is larger than the apex portion.

The insulating layer35is formed from a light sensitive resin material not including a coloring material. That is, the method of forming the insulating layer35forms the insulating layer35by applying a light sensitive resin material not including a coloring material across the entire surface of the base material11using a spin coating method or the like, thereby forming the light sensitive resin layer, and exposing and developing the light sensitive resin layer.

In the formation process of the color filter36, each colored layer36R,36G, and36B is formed between the insulating layers35by applying a light sensitive resin material including a coloring material across the entire surface of the base material11using a spin coating method or the like covering the insulating layer35, thereby forming the light sensitive resin layer, and exposing and developing the light sensitive resin layer. Accordingly, the height of the insulating layer35on the sealing layer34is smaller (lower) than the thickness of each colored layer36R,36G, and36B.

In this way, as long as the insulating layer35is formed between the colored layers of the different colors of sub-pixels18, since the proportion of emitted light from the organic EL element30of the different colors of sub-pixels18that passes through the colored layer with a color different to the colored layer originally to be passed through is reduced, it is possible to reduce variations in the mixed color of red light and green light, green light and blue light, and blue light and red light and the color balance in the viewing angle characteristics.

In this way, in a case of an aspect of forming the insulating layer35, it is possible to use the material of the insulating layer35in the projection. Since it is possible to manufacture the projection with the same process as the manufacturing process of the insulating layer35, it is possible to manufacture the projection without newly adding a manufacturing process.

As shown inFIG. 11, an overcoating layer37is formed so as to cover the color filter36. The overcoating layer37is formed with the object of relieving the roughness of the surface of the colored layers36R,36G, and36B formed on the sealing layer34, and protecting the color filter36. The overcoating layer37is formed using an acrylic or polyimide light sensitive resin material so as to cover the color filter36. The thickness of the overcoating layer37is approximately 0.5 μm to 1 μm.

In this way, in the case of a form that forms the overcoating layer37, it is possible to use the material of the overcoating layer37as the projection. Since it is possible to manufacture the projection with the same process as the manufacturing process of the overcoating layer37, it is possible to manufacture the projection without newly adding a manufacturing process.

As above, the projection is not limited to being formed with the material of the color filter36, and the same material as the insulating layer35may be used, or the projection may be formed using the same material as the overcoating layer37.

Modification Example 2

As described above, the end portion34b1of the second sealing layer34bis not limited to being arranged further to the inside than the end portion41aof the counter substrate41, and may be arranged as shown inFIG. 12.FIG. 12is a schematic cross-sectional view showing a structure of an organic EL device114of the modification example.

As shown inFIG. 12, the organic EL device114of the Modification Example 2 is configured so that the end portion41aof the counter substrate41is further inside than the end portion34b1of the second sealing layer34bin plan view. That is, the size of the planar counter substrate41is made smaller than the size of the second sealing layer34b.

Accordingly, since the counter substrate41is small compared to the above-described embodiment, it is possible for the margin for ensuring the precision of positioning with the element substrate10to be reduced. It is possible for the filler42protruding to the side of the neighboring organic EL device114to be suppressed. Meanwhile, even though the second sealing layer34bis a part not protected by the counter substrate41, it is possible for the second sealing layer34bto be protected by the filler42.

Modification Example 3

Although the color filter36is arranged in the organic EL device100as in the above-described first embodiment, there is no limitation thereto, and a form may be used without a color filter36.

The entire disclosure of Japanese Patent Application No.:2015-020008, filed Feb. 4, 2015 is expressly incorporated by reference herein.