JP2011009093A - Organic el device and electronic equipment - Google Patents

Abstract

In a conventional organic EL device, it is difficult to improve display quality.
First and second light-emitting elements that emit R light and are arranged along the X direction, and third light that emits G-color light and that is arranged along the Y direction. An element, a fourth light emitting element, and a fifth light emitting element; and a sixth light emitting element and a seventh light emitting element that emit light of B color and are arranged along the Y direction. The sixth light emitting element is disposed between the third light emitting element and the fourth light emitting element, and the seventh light emitting element is disposed between the fourth light emitting element and the second light emitting element. The first light emitting element, the second light emitting element, the third light emitting element, the light emitting layer included in each of the fourth light emitting element and the fifth light emitting element are formed by a coating method. The light emitting layers of the sixth light emitting element and the seventh light emitting element are formed by vapor deposition or spin coating. The organic EL device, characterized in that.
[Selection] Figure 3

Description

  The present invention relates to an organic EL device, an electronic device, and the like.

  2. Description of the Related Art Conventionally, in an organic EL (Electro Luminescence) device having a plurality of types of pixels in which emission colors are classified for each of a plurality of colors, the light-emitting layer of some types of pixels among the plurality of types of pixels is the same. There is known a configuration in which a plurality of types of pixels including a plurality of types of pixels and other types of pixels are provided (see, for example, Patent Document 1).

JP-A-10-153967

Patent Document 1 describes an organic EL device having three types of pixels whose emission colors are classified into three, red, green, and blue. This organic EL device includes a pixel provided with a light emitting layer that emits red light (hereinafter referred to as a red pixel), a pixel provided with a light emitting layer that emits green light (hereinafter referred to as a green pixel), It has three types of pixels, a pixel provided with a light emitting layer that emits blue light (hereinafter referred to as a blue pixel).
According to Patent Document 1, a light emitting layer that emits red light (hereinafter referred to as a red light emitting layer) and a light emitting layer that emits green light (hereinafter referred to as a green light emitting layer) are each formed by an inkjet method. Each pattern is patterned. A light emitting layer that emits blue light (hereinafter referred to as a blue light emitting layer) is also formed on the red light emitting layer and the green light emitting layer across three types of pixels including the pixel on which the blue light emitting layer is to be provided. The Thereby, full color display in an organic EL device can be realized.

Here, in the organic EL device described in Patent Document 1, the following manufacturing method can be adopted.
In this manufacturing method, the light emitting layers of the respective colors are formed on the substrate 801 shown in FIG. A partition wall 803 is provided on the substrate 801. The partition wall 803 partitions a red pixel region 805, a green pixel region 807, and a blue pixel region 809 for each pixel.
In this manufacturing method, as shown in FIG. 15B, the liquid body 811a and the liquid body 813a are arranged in the region 805 and the region 807, respectively. The liquid body 811a contains an organic material constituting the red light emitting layer. The liquid body 813a contains an organic material constituting the green light emitting layer. For the arrangement of the liquid body 811a and the liquid body 813a, an ink jet method using a droplet discharge head 815 can be used.

A technique for ejecting the liquid body 811a, the liquid body 813a, and the like from the droplet ejection head 815 as the droplet 811b and the droplet 813b is called an inkjet technique. A method of arranging the liquid material 811a, the liquid material 813a, and the like at predetermined positions using the ink jet technique is called an ink jet method. This ink jet method is one of coating methods.
Next, by drying each of the liquid body 811a and the liquid body 813a, the red light emitting layer 821 and the green light emitting layer 823 shown in FIG. 15C can be formed.
Next, as shown in FIG. 15D, a blue light emitting layer 825 is formed on the substrate 801 by a vapor deposition method. Accordingly, a blue light emitting layer 825 can be formed in the region 809.
With the above manufacturing method, an organic EL device capable of performing full color display can be manufactured.

By the way, in the above-described substrate 801, the film thickness of the red light emitting layer 821 and the green light emitting layer 823 tends to be biased when the liquid 811a and the liquid 813a are dried, as shown in FIG.
In the organic EL device, when the thickness of the light emitting layer varies within the pixel region, the luminance within the pixel region tends to vary. In other words, if the thickness of the light emitting layer varies within the pixel region, a difference in brightness tends to occur within the pixel region according to the thickness of the light emitting layer.
In the above-described substrate 801, the red light emitting layer 821 and the green light emitting layer 823 are likely to be uneven in thickness, and therefore, regions having high luminance are likely to be uneven in each of the region 805 and the region 807. This tends to lead to a decrease in display quality.
That is, the conventional organic EL device has a problem that it is difficult to improve display quality.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 First and second light emitting elements that emit light of a first color and are arranged along a first direction, and light of a second color that is different from the first color The third light emitting element, the fourth light emitting element, and the fifth light emitting element that emit light and are arranged along the second direction intersecting the first direction are different from the first color and the second color. And a sixth light emitting element and a seventh light emitting element arranged along the second direction, wherein the fourth light emitting element includes the first light emitting element and the second light emitting element. The sixth light emitting element is disposed between the third light emitting element and the fourth light emitting element, and the seventh light emitting element is disposed between the fourth light emitting element and the fourth light emitting element. The first light-emitting element, the second light-emitting element, the third light-emitting element, the fourth light-emitting element, and the The light emitting layers of the five light emitting elements are formed by a coating method, and the light emitting layers of the sixth light emitting element and the seventh light emitting element are formed by an evaporation method or a spin coating method. An organic EL device.

The organic EL device of this application example includes a first light emitting element and a second light emitting element, a third light emitting element, a fourth light emitting element and a fifth light emitting element, and a sixth light emitting element and a seventh light emitting element. ing.
The first light emitting element and the second light emitting element emit light of the first color. The first light emitting element and the second light emitting element are arranged along the first direction.
The third light emitting element, the fourth light emitting element, and the fifth light emitting element emit light of a second color different from the first color. The third light emitting element, the fourth light emitting element, and the fifth light emitting element are arranged along a second direction that intersects the first direction.
The sixth light emitting element and the seventh light emitting element emit light of a third color different from the first color and the second color. The sixth light emitting element and the seventh light emitting element are arranged along the second direction.
In this organic EL device, the fourth light emitting element is disposed between the first light emitting element and the second light emitting element. The sixth light emitting element is disposed between the third light emitting element and the fourth light emitting element. The seventh light emitting element is disposed between the fourth light emitting element and the fifth light emitting element.
And the light emitting layer which each of the first light emitting element, the second light emitting element, the third light emitting element, the fourth light emitting element, and the fifth light emitting element has is formed by a coating method. Further, the light emitting layers of the sixth light emitting element and the seventh light emitting element are formed by vapor deposition or spin coating.

In this organic EL device, the fourth light emitting element is sandwiched between the first light emitting element and the second light emitting element in the first direction. For this reason, when the light emitting layer of the fourth light emitting element is formed by a coating method, the material of the applied light emitting layer is sandwiched in the first direction by the materials of the respective light emitting layers of the first light emitting element and the second light emitting element. It is. Thereby, it is possible to easily prepare the dry state of the material at both ends of the material of the light emitting layer of the fourth light emitting element. As a result, the thickness of the light emitting layer of the fourth light emitting element can be easily aligned at both ends in the first direction. For this reason, in the first direction, the thickness of the light emitting layer of the fourth light emitting element can be easily made symmetrical.
On the other hand, the fourth light emitting element is sandwiched between the sixth light emitting element and the seventh light emitting element in the second direction. Therefore, when the light emitting layer of the fourth light emitting element is formed by a coating method, the material of the applied light emitting layer is sandwiched in the second direction by the respective regions of the sixth light emitting element and the seventh light emitting element. Thereby, it is possible to easily prepare the dry state of the material at both ends of the material of the light emitting layer of the fourth light emitting element. As a result, in the second direction, the thickness of the light emitting layer of the fourth light emitting element can be easily aligned at both ends. For this reason, in the second direction, the thickness of the light emitting layer of the fourth light emitting element can be easily made symmetrical.
That is, in this organic EL device, the film thickness of the light emitting layer of the fourth light emitting element tends to be symmetric in each of the first direction and the second direction. As a result, in this organic EL device, the luminance distribution in the light emitting region of the light emitting element tends to be symmetric in each of the first direction and the second direction. Therefore, in this organic EL device, display quality can be easily improved.

  Application Example 2 First and second light emitting elements that emit light of a first color and are arranged along a first direction, and light of a second color that is different from the first color. The third light emitting element, the fourth light emitting element, and the fifth light emitting element that emit light and are arranged along the second direction intersecting the first direction are different from the first color and the second color. And a sixth light emitting element and a seventh light emitting element that are arranged along the first direction, and the fourth light emitting element includes the first light emitting element and the second light emitting element. The sixth light emitting element is disposed between the first light emitting element and the fourth light emitting element, and the seventh light emitting element is disposed between the fourth light emitting element and the fourth light emitting element. Two light emitting elements, the first light emitting element, the second light emitting element, the third light emitting element, the fourth light emitting element, and the The light emitting layers of the five light emitting elements are formed by a coating method, and the light emitting layers of the sixth light emitting element and the seventh light emitting element are formed by an evaporation method or a spin coating method. An organic EL device.

The organic EL device of this application example includes a first light emitting element and a second light emitting element, a third light emitting element, a fourth light emitting element and a fifth light emitting element, and a sixth light emitting element and a seventh light emitting element. ing.
The first light emitting element and the second light emitting element emit light of the first color. The first light emitting element and the second light emitting element are arranged along the first direction.
The third light emitting element, the fourth light emitting element, and the fifth light emitting element emit light of a second color different from the first color. The third light emitting element, the fourth light emitting element, and the fifth light emitting element are arranged along a second direction that intersects the first direction.
The sixth light emitting element and the seventh light emitting element emit light of a third color different from the first color and the second color. The sixth light emitting element and the seventh light emitting element are arranged along the first direction.
In this organic EL device, the fourth light emitting element is disposed between the first light emitting element and the second light emitting element. The sixth light emitting element is disposed between the first light emitting element and the fourth light emitting element. The seventh light emitting element is disposed between the fourth light emitting element and the second light emitting element.
And the light emitting layer which each of the first light emitting element, the second light emitting element, the third light emitting element, the fourth light emitting element, and the fifth light emitting element has is formed by a coating method. Further, the light emitting layers of the sixth light emitting element and the seventh light emitting element are formed by vapor deposition or spin coating.

In this organic EL device, the fourth light emitting element is sandwiched between the third light emitting element and the fifth light emitting element in the second direction. For this reason, when the light emitting layer of the fourth light emitting element is formed by the coating method, the material of the applied light emitting layer is sandwiched in the second direction by the materials of the light emitting layers of the third light emitting element and the fifth light emitting element. It is. Thereby, it is possible to easily prepare the dry state of the material at both ends of the material of the light emitting layer of the fourth light emitting element. As a result, in the second direction, the thickness of the light emitting layer of the fourth light emitting element can be easily aligned at both ends. For this reason, in the second direction, the thickness of the light emitting layer of the fourth light emitting element can be easily made symmetrical.
On the other hand, the fourth light emitting element is sandwiched between the sixth light emitting element and the seventh light emitting element in the first direction. For this reason, when forming the light emitting layer of a 4th light emitting element by the apply | coating method, the material of the apply | coated light emitting layer is pinched | interposed by the 1st direction by each area | region of a 6th light emitting element and a 7th light emitting element. Thereby, it is possible to easily prepare the dry state of the material at both ends of the material of the light emitting layer of the fourth light emitting element. As a result, the thickness of the light emitting layer of the fourth light emitting element can be easily aligned at both ends in the first direction. For this reason, in the first direction, the thickness of the light emitting layer of the fourth light emitting element can be easily made symmetrical.
That is, in this organic EL device, the film thickness of the light emitting layer of the fourth light emitting element tends to be symmetric in each of the first direction and the second direction. As a result, in this organic EL device, the luminance distribution in the light emitting region of the light emitting element tends to be symmetric in each of the first direction and the second direction. Therefore, in this organic EL device, display quality can be easily improved.

  Application Example 3 In the above organic EL device, the distance between the first light emitting element and the fourth light emitting element is substantially the same as the distance between the fourth light emitting element and the second light emitting element. Equally, the distance between the third light emitting element and the fourth light emitting element is substantially equal to the distance between the fourth light emitting element and the fifth light emitting element.

  In the organic EL device of this application example, the distance between the first light emitting element and the fourth light emitting element is substantially equal to the distance between the fourth light emitting element and the second light emitting element, and the third light emitting element and the fourth light emitting element are the same. Since the distance between the light emitting elements is substantially the same as the distance between the fourth light emitting element and the fifth light emitting element, the thickness of the light emitting layer of the fourth light emitting element in each of the first direction and the second direction is It tends to be symmetric. As a result, in this organic EL device, the luminance distribution in the light emitting region of the light emitting element tends to be symmetric in each of the first direction and the second direction. Therefore, in this organic EL device, display quality can be easily improved.

  Application Example 4 In the organic EL device described above, an eighth light emitting element that emits light of the first color, sandwiches the first light emitting element, and is arranged along the second direction. And a ninth light emitting element, and a distance between the first light emitting element and the fourth light emitting element is substantially equal to a distance between the fourth light emitting element and the second light emitting element. An interval between the light emitting element and the fourth light emitting element is substantially equal to an interval between the fourth light emitting element and the fifth light emitting element, and is between the eighth light emitting element and the first light emitting element. The interval is substantially equal to the interval between the first light emitting element and the ninth light emitting element, and the sixth light emitting element is also disposed between the eighth light emitting element and the first light emitting element. The seventh light emitting element is also disposed between the first light emitting element and the ninth light emitting element. EL devices.

The organic EL device of this application example includes an eighth light emitting element and a ninth light emitting element. The eighth light emitting element and the ninth light emitting element emit light of the first color. The 8th light emitting element and the 9th light emitting element are arranged along the 2nd direction on both sides of the 1st light emitting element.
In this organic EL device, the distance between the first light emitting element and the fourth light emitting element is substantially equal to the distance between the fourth light emitting element and the second light emitting element, and the third light emitting element, the fourth light emitting element, Is approximately equal to the distance between the fourth light emitting element and the fifth light emitting element, and the distance between the eighth light emitting element and the first light emitting element is between the first light emitting element and the ninth light emitting element. Is approximately equal to the interval between
In this organic EL device, the sixth light emitting element is also disposed between the eighth light emitting element and the first light emitting element, and the seventh light emitting element is interposed between the first light emitting element and the ninth light emitting element. Also arranged. For this reason, in this organic EL device, the film thickness of the light emitting layer of the first light emitting element can be easily made symmetrical in the second direction.

  Application Example 5 In the above organic EL device, the light emitting layer included in the sixth light emitting element and the light emitting layer included in the seventh light emitting element are continuous.

  Application Example 6 In the organic EL device described above, the light emitting layer included in the sixth light emitting element and the light emitting layer included in the seventh light emitting element are formed by vapor deposition, and the light emission included in the sixth light emitting element. The layer is separated from the light-emitting layer of the seventh light-emitting element.

  Application Example 7 In the organic EL device described above, the third color is a blue color.

  Application Example 8 An electronic apparatus having the organic EL device described above.

The electronic apparatus of this application example has an organic EL device. In this organic EL device, the film thickness of the light emitting layer tends to be symmetric in each of the first direction and the second direction. For this reason, in this organic EL device, the luminance distribution in the light emitting region of the light emitting element tends to be symmetric in each of the first direction and the second direction. Therefore, in this organic EL device, display quality can be easily improved.
The electronic apparatus has an organic EL device that can easily improve display quality. For this reason, in this electronic device, the display quality in the organic EL device can be easily improved.

The perspective view which shows the display apparatus in this embodiment. Sectional drawing in the AA in FIG. FIG. 3 is a plan view showing a part of a plurality of pixels in the embodiment. The figure which shows the circuit structure of the display apparatus in 1st Embodiment. Sectional drawing in the DD line | wire in FIG.3 (b). The figure explaining the manufacturing process of the element substrate in 1st Embodiment. The figure explaining the manufacturing process of the element substrate in 1st Embodiment. The figure explaining the manufacturing process of the element substrate in 1st Embodiment. The enlarged view of the E section in Fig.8 (a). Sectional drawing in the FF line | wire in FIG. The figure explaining the manufacturing process of the element substrate in 2nd Embodiment. The figure explaining the manufacturing process of the element substrate in 2nd Embodiment. FIG. 9 is a plan view showing a part of a plurality of pixels in a third embodiment. The perspective view of the electronic device to which the display apparatus in this embodiment is applied. The figure explaining a prior art. The figure explaining a prior art.

Embodiments will be described with reference to the drawings, taking as an example a display device using an organic EL device which is one of electronic devices.
As shown in FIG. 1, the display device 1 in the present embodiment includes an element substrate 3 and a sealing substrate 5. The element substrate 3 and the sealing substrate 5 are opposed to each other.
In the display device 1, an image or the like can be displayed on the display surface 7 that is the surface opposite to the sealing substrate 5 side of the element substrate 3.

Here, a plurality of composite pixels 9 are set in the display device 1. The plurality of composite pixels 9 are arranged in the X direction and Y direction in the drawing within the display area 11 and constitute a matrix M in which the X direction is the row direction and the Y direction is the column direction. The X direction and the Y direction are directions that intersect (orthogonal) each other in plan view. In the present embodiment, the X direction is also a direction in which scanning lines described later extend. Further, the Y direction is also a direction in which signal lines to be described later extend.
The display device 1 displays an image or the like on the display surface 7 by selectively emitting light from the plurality of composite pixels 9 to the outside of the display device 1 via the display surface 7. The display area 11 is an area where an image can be displayed. In FIG. 1, the composite pixel 9 is exaggerated and the number of composite pixels 9 is reduced for easy understanding of the configuration.

In the display device 1, the sealing substrate 5 has a bottom surface 13 that is a surface opposite to the element substrate 3 side, as shown in FIG. 2, which is a cross-sectional view taken along the line AA in FIG. 1. .
The element substrate 3 is provided with an organic EL element, which will be described later, on the bottom surface 13 side, that is, the sealing substrate 5 side. In the display device 1, the display surface 7 and the bottom surface 13 are in a front-back relationship.

The sealing substrate 5 is provided in a state of facing the element substrate 3 on the bottom surface 13 side with respect to the element substrate 3. The element substrate 3 and the sealing substrate 5 are bonded via an adhesive 16. In the display device 1, the organic EL element is covered with the adhesive 16 from the bottom surface 13 side.
Further, the element substrate 3 and the sealing substrate 5 are sealed with a sealing material 17 that surrounds the display region 11 inside the periphery of the display device 1. That is, in the display device 1, the organic EL element and the adhesive 16 are sealed with the element substrate 3, the sealing substrate 5, and the sealing material 17.

Here, the plurality of composite pixels 9 in the display device 1 constitute a plurality of composite pixel columns 21 and a plurality of composite pixel rows 23 as shown in FIG.
In the present embodiment, a plurality of composite pixels 9 arranged along the Y direction constitute one composite pixel row 21. A plurality of composite pixels 9 arranged along the X direction constitute one composite pixel row 23. In the composite pixel row 21, a plurality of composite pixels 9 are arranged at substantially equal intervals in the Y direction. In the composite pixel row 21, a plurality of composite pixels 9 are arranged at substantially equal intervals in the X direction.
The composite pixel 9 includes a plurality of pixels 25 (three pixels 25 in the present embodiment) as shown in FIG. 3B, which is an enlarged view of a portion C in FIG. The plurality of pixels 25 in one composite pixel 9 have different colors of emitted light.

In the present embodiment, in the composite pixel 9, each of the plurality of pixels 25 has a color of light emitted from the display surface 7 of one of red (R), green (G), and blue (B). Is set to one. The composite pixel 9 includes three types of pixels 25 having different colors of emitted light. That is, the plurality of pixels 25 constituting the composite pixel 9 include a pixel 25R that emits R light, a pixel 25G that emits G light, and a pixel 25B that emits B light.
In the following, the notation of pixel 25 and the notation of pixel 25R, pixel 25G, and pixel 25B are used appropriately.

  Here, the color of R is not limited to a pure red hue, and includes orange and the like. The color of G is not limited to a pure green hue, and includes bluish green and yellowish green. The color of B is not limited to a pure blue hue, and includes bluish purple and blue-green. From another viewpoint, light exhibiting the color of R can be defined as light having a light wavelength peak in a range of 570 nm or more in the visible light region. The light exhibiting the color G can be defined as light having a light wavelength peak in the range of 500 nm to 565 nm. Light exhibiting the color B can be defined as light having a light wavelength peak in the range of 415 nm to 495 nm.

  In the present embodiment, a plurality of pixels 25 arranged along the X direction constitute one pixel row 27 as shown in FIG. One composite pixel row 23 includes two pixel rows 27 of a pixel row 27S and a pixel row 27P. In the plurality of pixels 25 constituting the pixel row 27S, the color of the emitted light is unified to one of R, G, and B. That is, the plurality of pixels 25 constituting the pixel row 27S are unified into one type of the pixel 25R, the pixel 25G, and the pixel 25B. In the present embodiment, the plurality of pixels 25 constituting the pixel row 27S are unified into the pixel 25B. In the pixel row 27S, a plurality of pixels 25B are arranged along the X direction.

On the other hand, the plurality of pixels 25 constituting the pixel row 27P includes the remaining two types of the pixel 25R, the pixel 25G, and the pixel 25B. In the present embodiment, the plurality of pixels 25 constituting the pixel row 27P includes a pixel 25R and a pixel 25G. In the pixel row 27P, the pixels 25R and the pixels 25G are alternately arranged along the X direction.
In the present embodiment, the pixel rows 27S and the pixel rows 27P are alternately arranged in the Y direction.

  In the present embodiment, the pixel 25B has a length in the X direction that is longer than a length in the Y direction. That is, the pixel 25B extends in the X direction. In contrast, the pixel 25R and the pixel 25G each have a longer length in the Y direction than a length in the X direction. That is, the pixel 25R and the pixel 25G each extend in the Y direction. In the present embodiment, the regions of the pixel 25B, the pixel 25R, and the pixel 25G are set to have substantially the same area. Thereby, the amount of light emitted from the pixel 25 can be made substantially equal among the pixel 25B, the pixel 25R, and the pixel 25G. However, the respective regions of the pixel 25B, the pixel 25R, and the pixel 25G are not limited to being substantially the same area as each other. There may be.

By the way, the region of the composite pixel 9 has a quadrilateral shape in plan view. In the present embodiment, the area of the composite pixel 9 is set to be substantially square.
In the present embodiment, in the region of the composite pixel 9, the three pixels 25 are arranged in the order of the pixel 25B, the pixel 25G, and the pixel 25R in the clockwise direction from the pixel 25B. However, the arrangement order of the three pixels 25 is not limited to this, and for example, the arrangement order of the pixels 25B, 25R, and 25G in the clockwise direction from the pixel 25B can be employed. In this arrangement order, the pixel 25R and the pixel 25G shown in FIG. 3B are replaced with each other.

The interval between two pixels 25B adjacent in the X direction is set to be approximately equal over the pixel row 27S. Further, between two composite pixels 9 adjacent in the Y direction, the interval between the two pixels 25 </ b> B arranged in the Y direction is set to be substantially equal across the composite pixel row 21.
On the other hand, the interval between the pixel 25R and the pixel 25G adjacent in the X direction is set at substantially equal intervals over the pixel row 27P. Further, between two composite pixels 9 adjacent in the Y direction, the interval between the two pixels 25 </ b> R arranged in the Y direction is set to be substantially equal across the composite pixel row 21. Similarly, the interval between two pixels 25 </ b> G arranged in the Y direction between two adjacent composite pixels 9 in the Y direction is also set to be approximately equidistant across the composite pixel row 21.

The display device 1 includes a selection transistor 31, a drive transistor 33, a capacitor element 35, and an organic EL element 37 for each pixel 25, as shown in FIG. The organic EL element 37 has a pixel electrode 39, an organic layer 41, and a common electrode 43. Each of the selection transistor 31 and the drive transistor 33 is configured by a TFT (Thin Film Transistor) element and has a function as a switching element. In the following, when the organic EL element 37 is identified for each of the pixel 25R, the pixel 25G, and the pixel 25B, the notation of the organic EL element 37R, the organic EL element 37G, and the organic EL element 37B is used. At this time, the organic EL element 37 in the pixel 25R corresponds to the organic EL element 37R, the organic EL element 37 in the pixel 25G corresponds to the organic EL element 37G, and the organic EL element 37 in the pixel 25B corresponds to the organic EL element 37B. .
In addition, the display device 1 includes a scanning line driving circuit 45, a signal line driving circuit 47, a plurality of scanning lines GT, a plurality of signal lines SI, and a plurality of power supply lines PW.

The plurality of scanning lines GT are respectively connected to the scanning line driving circuit 45, and extend in the X direction with a space therebetween in the Y direction.
The plurality of signal lines SI are respectively connected to the signal line drive circuit 47, and extend in the Y direction with a space therebetween in the X direction.
The plurality of power supply lines PW extend in the X direction in a state in which the power supply lines PW are spaced from each other in the Y direction, and the power supply lines PW and the scanning lines GT are spaced in the Y direction.

Each pixel 25 is set corresponding to the intersection of each scanning line GT and each signal line SI. Each scanning line GT and each power supply line PW correspond to each pixel row 27 shown in FIG. Each signal line SI is provided corresponding to each of a column of pixels 25R arranged in the Y direction and a column of pixels 25G arranged in the Y direction.
The gate electrode of each selection transistor 31 shown in FIG. 4 is electrically connected to each corresponding scanning line GT. The source electrode of each selection transistor 31 is electrically connected to each corresponding signal line SI. The drain electrode of each select transistor 31 is electrically connected to the gate electrode of each drive transistor 33 and one electrode of each capacitive element 35.
In the present embodiment, the source electrode of the selection transistor 31 in the pixel 25B is connected to the signal line SI corresponding to the pixel 25R. However, the source electrode of the selection transistor 31 in the pixel 25B may be connected to the signal line SI corresponding to the pixel 25G.

The other electrode of the capacitive element 35 and the source electrode of the drive transistor 33 are electrically connected to the corresponding power supply line PW.
The drain electrode of each drive transistor 33 is electrically connected to each pixel electrode 39. Each pixel electrode 39 and the common electrode 43 constitute a pair of electrodes having the pixel electrode 39 as an anode and the common electrode 43 as a cathode.
Here, the common electrode 43 is provided in a series of states between the plurality of pixels 25 constituting the matrix M, and functions in common between the plurality of pixels 25.
The organic layer 41 interposed between each pixel electrode 39 and the common electrode 43 is made of an organic material and has a configuration including a light emitting layer to be described later.

  The selection transistor 31 is turned on when a selection signal is supplied to the scanning line GT connected to the selection transistor 31. At this time, a data signal is supplied from the signal line SI connected to the selection transistor 31, and the driving transistor 33 is turned on. The gate potential of the driving transistor 33 is held for a certain period by holding the potential of the data signal in the capacitor 35 for a certain period. As a result, the ON state of the drive transistor 33 is held for a certain period. Each data signal is generated at a potential corresponding to the gradation display.

When the ON state of the drive transistor 33 is maintained, a current corresponding to the gate potential of the drive transistor 33 flows from the power supply line PW to the common electrode 43 through the pixel electrode 39 and the organic layer 41. Then, the light emitting layer included in the organic layer 41 emits light with a luminance corresponding to the amount of current flowing through the organic layer 41. Thereby, the display device 1 can perform gradation display.
The display device 1 is one of bottom emission type organic EL devices in which a light emitting layer included in the organic layer 41 emits light, and light from the light emitting layer is emitted from the display surface 7 through the element substrate 3. In the display device 1, the expression “display surface 7 side” is also expressed as the upper side, and the expression “bottom surface 13 side” is also expressed as the lower side.

Here, the details of the configurations of the element substrate 3 and the sealing substrate 5 will be described.
The element substrate 3 includes a first substrate 51 and an element layer 53, as shown in FIG. 5 which is a cross-sectional view taken along the line DD in FIG. The element layer 53 includes a drive element layer 55.
5, the selection transistor 31, the drive transistor 33, the capacitor 35, the scanning line GT, the signal line SI, and the power supply line PW shown in FIG. 4 are omitted for easy understanding of the configuration. The selection transistor 31, the drive transistor 33, the capacitor element 35, the scanning line GT, the signal line SI, and the power supply line PW are included in the drive element layer 55.

The first substrate 51 is made of a light-transmitting material such as glass or quartz, for example, and includes a first surface 52a directed to the bottom surface 13 side, and a second surface 52b directed to the display surface 7 side. ,have.
The drive element layer 55 is provided on the first surface 52 a of the first substrate 51.
A pixel electrode 39 is provided on the bottom surface 13 side of the drive element layer 55. As a material of the pixel electrode 39, for example, ITO (Indium Tin Oxide), indium zinc oxide (Indium Zinc Oxide), or the like can be adopted. In the present embodiment, ITO is adopted as the material of the pixel electrode 39.

  An insulating film (first partition) 57 that partitions each pixel 25 is provided between adjacent pixel electrodes 39. The insulating film 57 is made of a light transmissive material such as silicon oxide, silicon nitride, or acrylic resin. The insulating film 57 is provided in a mesh shape in which the area of each pixel 25 is opened over the display area 11 in plan view. For this reason, the display region 11 is partitioned into regions of the plurality of pixels 25 by the insulating film 57. When attention is paid to one pixel 25, the insulating film 57 is provided in an annular shape in plan view. Each pixel electrode 39 overlaps the area of each pixel 25 surrounded by the insulating film 57 in plan view. In this embodiment, silicon oxide is employed as the material for the insulating film 57.

  On the bottom surface 13 side of the insulating film 57, an insulating film (second partition) 59 surrounding the region of each pixel 25 is provided. The insulating film 59 is made of, for example, an organic material such as an acrylic resin or a polyimide resin containing a material having high light absorption such as carbon black or chromium, and has a mesh shape along the insulating film 57 in a plan view. Is provided. Focusing on one pixel 25, the insulating film 59 surrounds the region of each pixel 25 in plan view. For this reason, the insulating film 59 can be regarded as being provided in a ring shape for each pixel 25. In the present embodiment, an acrylic resin is employed as the material of the insulating film 59.

An organic layer 41 is provided on the bottom surface 13 side of the pixel electrode 39.
The organic layer 41 is provided corresponding to each pixel 25 and has a hole injection layer 61 and a light emitting layer 65.
The hole injection layer 61 is made of an organic material, and is provided on the bottom surface 13 side of the pixel electrode 39 for each pixel 25.
As the organic material of the hole injection layer 61, a mixture of a polythiophene derivative such as 3,4-polyethylenedioxythiophene (PEDOT) and polystyrene sulfonic acid (PSS) or the like may be employed. As the organic material for the hole injection layer 61, polythiophene, polypyrrole, polyaniline, polyacetylene, derivatives thereof, and the like may be employed. In the present embodiment, a mixture of PEDOT and PSS is employed as the organic material for the hole injection layer 61.

The light emitting layer 65 is made of an organic material, and has a different configuration for each of the pixels 25R, 25G, and 25B.
Here, in the following, when the light emitting layer 65 is identified for each of R, G, and B, the notation of the light emitting layer 65R, the light emitting layer 65G, and the light emitting layer 65B is used. The light emitting layer 65R is a light emitting layer 65 that emits R light. Similarly, the light emitting layer 65G is a light emitting layer 65 that emits G light, and the light emitting layer 65B is a light emitting layer 65 that emits B light.
The organic layer 41R corresponding to the pixel 25R includes a light emitting layer 65R and a light emitting layer 65B.
The organic layer 41G corresponding to the pixel 25G has a light emitting layer 65G and a light emitting layer 65B.
The organic layer 41B corresponding to the pixel 25B has a light emitting layer 65B.

In the pixel 25 </ b> R, the light emitting layer 65 </ b> R is provided on the bottom surface 13 side of the hole injection layer 61. The light emitting layer 65R is provided in a region overlapping each pixel electrode 39 in plan view. In the present embodiment, in each pixel 25R, the light emitting layer 65R covers the hole injection layer 61 from the bottom surface 13 side.
As the organic material of the light emitting layer 65R, for example, the following compound 1 may be employed.

In the organic layer 41R, the light emitting layer 65B is provided on the bottom surface 13 side of the light emitting layer 65R. In the present embodiment, in each pixel 25R, the light emitting layer 65B covers the light emitting layer 65R from the bottom surface 13 side.
In the pixel 25G, the light emitting layer 65G is provided on the bottom surface 13 side of the hole injection layer 61. The light emitting layer 65G is provided in a region overlapping each pixel electrode 39 in plan view. In the present embodiment, in each pixel 25G, the light emitting layer 65G covers the hole injection layer 61 from the bottom surface 13 side.
As the organic material for the light emitting layer 65G, for example, the following compound 2 may be employed.

In the organic layer 41G, the light emitting layer 65B is provided on the bottom surface 13 side of the light emitting layer 65G. In the present embodiment, in each pixel 25G, the light emitting layer 65B covers the light emitting layer 65G from the bottom surface 13 side.
In the pixel 25 </ b> B, the light emitting layer 65 </ b> B is provided on the bottom surface 13 side of the hole injection layer 61. The light emitting layer 65B is provided in a region overlapping each pixel electrode 39 in plan view. In the present embodiment, in each pixel 25B, the light emitting layer 65B covers the hole injection layer 61 from the bottom surface 13 side.
As the organic material of the light emitting layer 65B, for example, the following compound 3 may be employed.

  In the present embodiment, the light emitting layer 65 </ b> B is provided between the plurality of pixels 25, that is, in a state in which the light emitting layer 65 </ b> B extends across the insulating film 59. However, the mode of the light emitting layer 65B is not limited to this, and a mode in which each pixel 25 is provided independently independently, that is, in a state in which the pixels 25 are interrupted may be employed.

A common electrode 43 is provided on the bottom surface 13 side of the organic layer 41. In the present embodiment, the common electrode 43 is provided in a state in which the common electrode 43 extends over the plurality of pixels 25 across the insulating film 57 in a plan view.
In the present embodiment, the common electrode 43 has a configuration in which a plurality of layers (not shown) are stacked. In the present embodiment, the plurality of layers constituting the common electrode 43 include a lithium fluoride layer, a calcium layer, and an aluminum layer in order from the organic layer 41 toward the bottom surface 13 side.
The lithium fluoride layer is made of a material mainly composed of lithium fluoride. The calcium layer is made of a material mainly composed of calcium. The aluminum layer is made of a material mainly composed of aluminum.

  In the display device 1, the region emitting light in each pixel 25 is defined as a region where the pixel electrode 39, the organic layer 41, and the common electrode 43 overlap in a region surrounded by the insulating film 57 in plan view. Can be done. In addition, a group of elements constituting a region that emits light for each pixel 25 may be defined as one organic EL element 37. In the display device 1, one organic EL element 37 has a configuration including one pixel electrode 39, one organic layer 41, and a common electrode 43 corresponding to one pixel 25.

The sealing substrate 5 is made of a light-transmitting material such as glass or quartz, for example, and includes a facing surface 5a facing the display surface 7 side and an outward surface 5b facing the bottom surface 13 side. Have.
In the element substrate 3 and the sealing substrate 5 having the above-described configuration, the common electrode 43 of the element substrate 3 and the facing surface 5 a of the sealing substrate 5 are bonded via an adhesive 16.

  In the display device 1, the sealing material 17 illustrated in FIG. 2 is sandwiched between the first surface 52 a of the first substrate 51 and the facing surface 5 a of the sealing substrate 5 illustrated in FIG. 5. That is, in the display device 1, the organic EL element 37 and the adhesive 16 are sealed with the first substrate 51, the sealing substrate 5, and the sealing material 17. The sealing material 17 may be provided between the facing surface 5 a and the common electrode 43. In this case, the organic EL element 37 and the adhesive 16 can be regarded as being sealed by the element substrate 3, the sealing substrate 5, and the sealing material 17.

Here, a method for manufacturing the display device 1 will be described.
The manufacturing method of the display device 1 is roughly divided into a step of manufacturing the element substrate 3 and a step of assembling the display device 1.
In the process of manufacturing the element substrate 3, first, the drive element layer 55 is formed on the first surface 52 a of the first substrate 51 as shown in FIG.
Next, pixel electrodes 39 corresponding to the respective pixels 25 are formed on the bottom surface 13 side of the drive element layer 55.
Next, an insulating film 57 is formed on the periphery of each pixel electrode 39 between adjacent pixel electrodes 39.
Next, an insulating film 59 is formed on the bottom surface 13 side of the insulating film 57.

  Here, in the formation of the pixel electrode 39, for example, a film forming technique such as a sputtering technique or a vacuum evaporation technique, or a patterning technique such as a photolithography technique or an etching technique can be used. In forming the pixel electrode 39, first, an ITO film is formed on the bottom surface 13 side of the drive element layer 55 by utilizing, for example, a sputtering technique or a vacuum deposition technique. Next, the pixel electrode 39 may be formed by patterning the ITO film using a patterning technique such as a photolithography technique and an etching technique.

In forming the insulating film 57, a film forming technique such as a CVD (Chemical Vapor Deposition) technique, a PVD (Physical Vapor Deposition) technique, or a patterning technique such as a photolithography technique and an etching technique can be used. In forming the insulating film 57, first, a silicon oxide film is formed by utilizing, for example, a CVD technique or a PVD technique. Next, the insulating film 57 can be formed by patterning the silicon oxide film using a patterning technique such as a photolithography technique and an etching technique.
In forming the insulating film 59, first, a resin film that covers the pixel electrode 39 and the insulating film 57 in a plan view is formed with an acrylic resin containing a negative photosensitive material. In the formation of the resin film, spin coating technology, printing technology, or the like can be used. Next, the resin film is patterned by utilizing, for example, a photolithography technique. Thereby, the insulating film 59 can be formed.
The first substrate 51 on which the configuration from the drive element layer 55 to the insulating film 59 is formed is hereinafter referred to as a substrate 51a.

Next, as shown in FIG. 6B, the substrate 51a is subjected to plasma treatment. In this plasma processing, oxygen plasma processing is performed on the substrate 51a, and then CF ₄ plasma processing is performed on the substrate 51a. By subjecting the substrate 51a to oxygen plasma treatment, the pixel electrode 39 is given lyophilicity to the liquid 61a described later. In addition, by performing CF ₄ plasma treatment on the substrate 51a, the insulating film 59 is provided with liquid repellency with respect to the liquid 61a described later.
In the present embodiment, a method is employed in which plasma is generated in the processing chamber while introducing a processing gas into the processing chamber while the processing chamber is kept at a predetermined degree of vacuum. In the present embodiment, a gas containing oxygen is used as the processing gas in the oxygen plasma processing. Further, the CF ₄ plasma treatment, as the processing gas, CF ₄ gas is employed is a gas containing a fluorine compound. In the CF ₄ plasma processing, the processing gas is not limited to CF ₄ gas, and halogen gas such as SF ₆ or CHF ₃ , fluorine gas, or the like may be employed.

Following the step of performing plasma treatment on the substrate 51a, as shown in FIG. 7A, the liquid material 61a is disposed in the region of each pixel 25 surrounded by the insulating film 59. The liquid material 61 a contains an organic material that constitutes the hole injection layer 61. For the arrangement of the liquid material 61a, an ink jet method using a droplet discharge head 71 can be used.
A technique for ejecting the liquid 61a or the like as the droplet 61b from the droplet ejection head 71 is called an inkjet technique. And the method of arrange | positioning the liquid body 61a etc. in a predetermined position using an inkjet technique is called the inkjet method. This ink jet method is one of coating methods.

The hole injection layer 61 shown in FIG. 7B can be formed by drying the liquid material 61a disposed in the region of each pixel 25 after drying by a reduced pressure drying method. In addition, the liquid body 61a may employ a configuration in which a mixture of PEDOT and PSS is dissolved in a solvent. As the solvent, for example, diethylene glycol, isopropyl alcohol, normal butanol and the like can be employed.
The reduced pressure drying method is a drying method performed under a reduced pressure environment, and is also called a vacuum drying method. The firing conditions of the liquid 61a are an environmental temperature of about 200 ° C. and a holding time of about 15 minutes.

Next, as illustrated in FIG. 7B, the liquid material 65Ra and the liquid material 65Ga are disposed in the respective regions of the pixel 25R and the pixel 25G in the region of the pixel 25 surrounded by the insulating film 59. For the pixel 25R, the liquid 65Ra is disposed in the region surrounded by the insulating film 59 by discharging the liquid 65Ra as the droplet 65Rb from the droplet discharge head 71. For the pixel 25G, the liquid material 65Ga is disposed in a region surrounded by the insulating film 59 by discharging the liquid material 65Ga as the liquid droplet 65Gb from the liquid droplet discharge head 71.
At this time, the liquid material is not arranged in the region of the pixel 25B.
Note that the arrangement of the liquid material 65Ra and the arrangement of the liquid material 65Ga may be either before or after.

The liquid body 65Ra contains an organic material that constitutes the light emitting layer 65R. The liquid material 65Ga contains an organic material that constitutes the light emitting layer 65G.
In the present embodiment, a configuration in which the above-described compound 1 is dissolved in a solvent may be employed as the liquid 65Ra. Moreover, the structure which melt | dissolved the compound 2 mentioned above in the solvent as liquid 65Ga may be employ | adopted. As the solvent, for example, cyclohexylbenzene or the like can be employed.
Next, the liquid material 65Ra and the liquid material 65Ga are dried by a reduced pressure drying method. Thereby, the light emitting layer 65R and the light emitting layer 65G shown in FIG. 8A can be formed.
In the following, the first substrate 51 on which the structure from the drive element layer 55 to the light emitting layer 65R and the light emitting layer 65G is formed is referred to as a substrate 51b.

Next, as shown in FIG. 8B, a liquid film 65Bb is formed of the liquid material 65Ba on the bottom surface 13 side of the substrate 51b. The liquid body 65Ba contains an organic material constituting the light emitting layer 65B. The liquid film 65Bb can be formed by utilizing, for example, a spin coating technique. Note that a film formation method utilizing a spin coating technique is one of application methods.
In the present embodiment, a configuration in which the above-described compound 3 is dissolved in a solvent may be employed as the liquid 65Ba. As the solvent, for example, isopropyl alcohol, normal butanol and the like can be employed. In the present embodiment, isopropyl alcohol is employed as the solvent for the liquid 65Ba.
Next, heat treatment is performed on the liquid film 65Bb in an inert gas. Thereby, the light emitting layer 65B shown in FIG. 5 may be formed. The heat treatment conditions are an environmental temperature of about 130 ° C. and a holding time of about 15 minutes. Moreover, in this embodiment, nitrogen gas is employ | adopted as inert gas.

Next, the common electrode 43 shown in FIG. 5 can be formed by forming a film in the order of the lithium fluoride layer, the calcium layer, and the aluminum layer by utilizing a vapor deposition technique or the like.
Thereby, the element substrate 3 can be manufactured.
In the process of assembling the display device 1, as shown in FIG. 2, the element substrate 3 and the sealing substrate 5 are joined via an adhesive 16 and a sealing material 17.
At this time, the element substrate 3 and the sealing substrate 5 are bonded together with the first surface 52a of the first substrate 51 and the facing surface 5a of the sealing substrate 5 facing each other, as shown in FIG. Thereby, the display apparatus 1 can be manufactured.

In the present embodiment, the display device 1 corresponds to the organic EL device, the organic EL element 37 corresponds to the light emitting element, the X direction corresponds to the first direction, and the Y direction corresponds to the second direction.
In the present embodiment, the interval between the pixel 25R and the pixel 25G adjacent in the X direction is set at substantially equal intervals over the pixel row 27P. For this reason, in the pixel 25 located at the center of the three pixels 25 continuously arranged in the pixel row 27P (FIG. 3B), the thickness of the light emitting layer 65 is the E portion in FIG. As shown in FIG. 9, which is an enlarged view of FIG.

Conventionally, in general organic EL devices, there are many configurations in which the pixels 25R, 25G, and 25B are arranged at substantially equal intervals in the X direction. In this configuration, an interval between the pixel 25R and the pixel 25G adjacent in the X direction in the composite pixel 9, and an interval between the pixel 25R and the pixel 25G adjacent in the X direction between the composite pixels 9 adjacent in the X direction are as follows. Different. This is one of the factors that cause the dried state of the liquid material 65Ra and the liquid material 65Ga disposed in the region of the pixel 25 to be biased in the X direction.
For this reason, in this configuration, the thickness of the light emitting layer 65 tends to be asymmetric with respect to the center line 81. That is, in this configuration, the thickness of the light emitting layer 65 tends to be biased.

  On the other hand, in the present embodiment, the interval between the pixel 25R and the pixel 25G adjacent in the X direction is set to be approximately equal over the pixel row 27P. For this reason, the dry state of the liquid material 65Ra and the liquid material 65Ga disposed in the region of the pixel 25 can be easily made symmetrical with respect to the center line 81. As a result, in the present embodiment, the thickness of the light emitting layer 65 can be easily made symmetrical with respect to the center line 81.

Similarly, in the present embodiment, between the composite pixels 9 adjacent in the Y direction, the interval between the two pixels 25R arranged in the Y direction and the interval between the two pixels 25G arranged in the Y direction are respectively the composite pixel column 21. It is set at substantially equal intervals. Therefore, in the pixel 25R and the pixel 25G, the thickness of the light emitting layer 65 is symmetrical with respect to the center line 83 having a width in the Y direction, as shown in FIG. 10 which is a cross-sectional view taken along line FF in FIG. Prone. This is for the same reason as described above.
As a result, in the present embodiment, the film thickness of the light emitting layer 65 tends to be symmetric in each of the X and Y directions. Therefore, in this embodiment, the luminance distribution in the region of the pixel 25 tends to be symmetric in each of the X direction and the Y direction. Therefore, in this embodiment, the display quality in the display device 1 can be easily improved.

A second embodiment will be described.
In the display device 1 according to the second embodiment, a hole blocking layer and an electron transport layer, which will be described later, are interposed between the light emitting layer 65B and the common electrode 43 (FIG. 5). In the second embodiment, the material of the light emitting layer 65B and the method of forming the light emitting layer 65B are different from those of the first embodiment. Except for these points, the display device 1 in the second embodiment has the same configuration as the display device 1 in the first embodiment. Therefore, in the following, in order to avoid redundant description, the same components as those of the display device 1 in the first embodiment among the components of the display device 1 in the second embodiment are denoted by the same reference numerals and detailed. Description is omitted.
In the second embodiment, a material in which a dopant material such as FIrpic shown as the following compound 5 is mixed with a host material such as CBP shown as the following compound 4 is employed as the light emitting layer 65B.

Further, in the formation of the light emitting layer 65B, a vapor deposition technique (vapor deposition method) is utilized. In the formation of the light emitting layer 65B, the host material of Compound 4 and the dopant material of Compound 5 are vapor-deposited on the bottom surface 13 side of the substrate 51b shown in FIG. Thereby, the light emitting layer 65B shown to Fig.11 (a) can be formed.
Next, as shown in FIG. 11B, a hole blocking layer 87 is formed on the bottom surface 13 side of the light emitting layer 65B. As a material constituting the hole blocking layer 87, for example, BCP shown as the following compound 6 may be employed. In the present embodiment, the hole blocking layer 87 is formed of BCP by vapor deposition.

  Next, as shown in FIG. 12A, an electron transport layer 89 is formed on the bottom surface 13 side of the hole blocking layer 87. As a material constituting the electron transport layer 89, for example, Alq3 (aluminum quinolinol) shown as the following compound 7 can be employed. In this embodiment, the electron transport layer 89 is formed of Alq3 by a vapor deposition method.

Next, as shown in FIG. 12B, the common electrode 43 is formed on the bottom surface 13 side of the electron transport layer 89. In the second embodiment, as the common electrode 43, a stacked configuration including a lithium fluoride layer and an aluminum layer in order from the electron transport layer 89 toward the bottom surface 13 is employed. By forming the common electrode 43 by the vapor deposition method, the element substrate 3 shown in FIG. 12B can be manufactured.
In the second embodiment having the above-described configuration, the same effect as that of the first embodiment can be obtained.
In the second embodiment, in order to provide the light emitting layer 65B independently for each pixel 25B, for example, a mask vapor deposition technique using a mask can be used.

A third embodiment will be described.
The display device 1 in the third embodiment has the same configuration as that of the display device 1 in the first embodiment except that the configuration of the pixel 25 in the composite pixel 9 is different. Therefore, in the following, in order to avoid redundant description, among the configurations of the display device 1 in the third embodiment, the same configurations as those of the display device 1 in the first embodiment are denoted by the same reference numerals and detailed. Description is omitted.

In the third embodiment, the composite pixel 9 includes four pixels 25 as shown in FIG. The third embodiment is common to the first embodiment in that the composite pixel 9 includes three types of pixels 25, a pixel 25R, a pixel 25G, and a pixel 25B.
In the third embodiment, the composite pixel 9 includes one pixel 25R, one pixel 25G, and two pixels 25B. Within the composite pixel 9, the four pixels 25 are arranged along the X direction. Each pixel 25 has a length in the Y direction longer than a length in the X direction. That is, each pixel 25 extends in the Y direction.

The width dimension in the X direction of the pixel 25B is narrower than the width dimension in the X direction of the pixel 25R and the pixel 25G. In the composite pixel 9, the total area of the two pixels 25B is set equal to the area of the pixel 25R and the area of the pixel 25G. Thereby, in the composite pixel 9, the amount of light emitted from the pixel 25 can be made substantially equal among the pixel 25B, the pixel 25R, and the pixel 25G. However, in the composite pixel 9, the total area of the two pixels 25B is not limited to being equal to the area of the pixel 25R or the area of the pixel 25G, and may be different from each other.
In the third embodiment, the pixels 25R and the pixels 25G are alternately arranged in the X direction at substantially equal intervals. In the X direction, the pixel 25B is interposed between the pixel 25R and the pixel 25G.
In the third embodiment, a plurality of pixels 25 arranged in a line along the Y direction constitute one pixel column 91. A plurality of pixels 25 arranged in a line along the X direction form one pixel row 93.

The light color of each pixel 25 in one pixel column 91 is set to one of R, G, and B. That is, in the third embodiment, a pixel column 91R in which a plurality of pixels 25R are arranged in the Y direction, a pixel column 91G in which a plurality of pixels 25G are arranged in the Y direction, and a pixel column in which a plurality of pixels 25B are arranged in the Y direction. 91B.
Hereinafter, the notation of the pixel column 91 and the notation of the pixel column 91R, the pixel column 91G, and the pixel column 91B are appropriately used.
In the third embodiment, one composite pixel row 23 includes one pixel row 93. One composite pixel column 21 includes four pixel columns 91. These four pixel columns 91 include one pixel column 91R, one pixel column 91G, and two pixel columns 91B.

The third embodiment is common to the first embodiment in that the scanning line GT (FIG. 4) is provided corresponding to the pixel row 93 (FIG. 13). However, the third embodiment is different from the first embodiment in that the signal line SI (FIG. 4) is provided corresponding to the pixel column 91 (FIG. 13).
Moreover, in 3rd Embodiment, the organic material of the light emitting layer 65B and the manufacturing method of the display apparatus 1 are also according to 1st Embodiment.
In the third embodiment having the above-described configuration, the same effects as those of the first embodiment and the second embodiment can be obtained. In the third embodiment, the pixel row 93 corresponds to the light emitting element array.

A fourth embodiment will be described.
In the display device 1 according to the fourth embodiment, the hole blocking layer 87 and the electron transport layer 89 are interposed between the light emitting layer 65B and the common electrode 43 (FIG. 5). In the fourth embodiment, the material of the light emitting layer 65B and the method of forming the light emitting layer 65B are different from those of the third embodiment. Except for these points, the display device 1 in the fourth embodiment has the same configuration as the display device 1 in the third embodiment. Therefore, in the following, in order to avoid redundant description, among the configurations of the display device 1 in the fourth embodiment, the same configurations as those of the display device 1 in the third embodiment are denoted by the same reference numerals and detailed. Description is omitted.
In the fourth embodiment, a material in which a dopant material such as FIrpic shown as the compound 5 is mixed with a host material such as CBP shown as the compound 4 described above is used as the light emitting layer 65B.

Further, in the formation of the light emitting layer 65B, a vapor deposition technique (vapor deposition method) is utilized. In the formation of the light emitting layer 65B, the host material of Compound 4 and the dopant material of Compound 5 are vapor-deposited on the bottom surface 13 side of the substrate 51b shown in FIG. Thereby, the light emitting layer 65B can be formed.
Next, after forming the hole blocking layer 87 on the bottom surface 13 side of the light emitting layer 65 </ b> B, the electron transport layer 89 is formed on the bottom surface 13 side of the hole blocking layer 87.
In the fourth embodiment, BCP shown as the compound 6 is adopted as the material of the hole blocking layer 87. As a material of the electron transport layer 89, Alq3 shown as the compound 7 is adopted. Further, the hole blocking layer 87 and the electron transport layer 89 are each formed by a vapor deposition method.
Then, the common electrode 43 is formed on the bottom surface 13 side of the electron transport layer 89. The configuration and formation method of the common electrode 43 are the same as those in the second embodiment.
In the fourth embodiment having the above-described configuration, the same effects as those in the first to third embodiments can be obtained.
In the fourth embodiment, for example, a mask vapor deposition technique using a mask can be used to provide the light emitting layer 65B independently for each pixel 25B.

  In the first to fourth embodiments, an example in which three types of pixels 25 (pixel 25R, pixel 25G, and pixel 25B) are set in the display device 1 is shown. The types are not limited to three types. As the types of the pixels 25, four or more types including the pixel 25R, the pixel 25G, and the pixel 25B, for example, the pixel 25 that emits white light and the pixel 25 that emits magenta light are used. Can be done.

  In the first to fourth embodiments, the display device 1 in which a plurality of pixels 25 are set and the organic EL element 37 is provided for each pixel 25 has been described as an example. However, the embodiment is limited to this. Not. As an embodiment, there is a form such as a lighting device in which the organic EL elements 37 are arranged in a series over the display region 11. Such an illuminating device is suitable for a light source such as a liquid crystal display device.

  In the first embodiment to the fourth embodiment, the insulating film 57 is made of a light-transmitting material, but the material of the insulating film 57 is not limited to this. As the material of the insulating film 57, a material having high light absorption can be adopted. If a material having a high light absorption property is adopted as the material of the insulating film 57, the light shielding property between the adjacent pixels 25 is enhanced. Thereby, the contrast in display can be easily improved, and the display quality can be easily improved.

In the first to fourth embodiments, the bottom emission type organic EL device that emits light from the organic layer 41 from the display surface 7 through the element substrate 3 is described as an example. The apparatus is not limited to this. As the organic EL device, a top emission type in which light from the organic layer 41 is emitted from the bottom surface 13 through the sealing substrate 5 may be employed.
In the case of the top emission type, since the light from the organic layer 41 is emitted from the bottom surface 13, the display surface 7 is set on the bottom surface 13 side. That is, in the top emission type, the bottom surface 13 and the display surface 7 of the display device 1 are interchanged. In the top emission type, the bottom surface 13 side corresponds to the upper side, and the display surface 7 side corresponds to the lower side.

  The display device 1 described above can be applied to, for example, the display unit 510 of the electronic device 500 illustrated in FIG. The electronic device 500 is a mobile phone. This electronic device 500 has an operation button 511. The display unit 510 can display various information including information input by the operation buttons 511 and incoming call information. In this electronic apparatus 500, since the display device 1 is applied to the display unit 510, the display quality in the display unit 510 can be easily improved.

  The electronic device 500 is not limited to a mobile phone, and includes various electronic devices such as mobile computers, digital still cameras, digital video cameras, in-vehicle devices such as display devices for car navigation systems, and audio devices.

  DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 3 ... Element substrate, 5 ... Sealing substrate, 7 ... Display surface, 9 ... Composite pixel, 13 ... Bottom surface, 21 ... Composite pixel column, 23 ... Composite pixel row, 25 ... Pixel, 27 ... Pixel row 27S ... pixel row, 37 ... organic EL element, 37R, 37G, 37B ... organic EL element, 41 ... organic layer, 41R, 41G, 41B ... organic layer, 65 ... light emitting layer, 65R, 65G, 65B ... light emitting layer, 65Ra, 65Ga ... liquid, 65Rb, 65Gb ... droplet, 65Ba ... liquid, 65Bb ... liquid film, 71 ... droplet ejection head, 87 ... hole blocking layer, 89 ... electron transport layer, 91 ... pixel row, 91R, 91G, 91B... Pixel columns, 93... Pixel rows, 500.

Claims (8)

A first light emitting element and a second light emitting element that emit light of a first color and are arranged along a first direction;
A third light emitting element, a fourth light emitting element, and a fifth light emitting element that emit light of a second color different from the first color and are arranged along a second direction that intersects the first direction;
A sixth light emitting element and a seventh light emitting element that emit light of a third color different from the first color and the second color and are arranged along the second direction;
Have
The fourth light emitting element is disposed between the first light emitting element and the second light emitting element;
The sixth light emitting element is disposed between the third light emitting element and the fourth light emitting element;
The seventh light emitting element is disposed between the fourth light emitting element and the fifth light emitting element;
The light emitting layers of each of the first light emitting element, the second light emitting element, the third light emitting element, the fourth light emitting element, and the fifth light emitting element are formed by a coating method,
The organic EL device, wherein the light emitting layers of the sixth light emitting element and the seventh light emitting element are formed by vapor deposition or spin coating. A first light emitting element and a second light emitting element that emit light of a first color and are arranged along a first direction;
A third light emitting element, a fourth light emitting element, and a fifth light emitting element that emit light of a second color different from the first color and are arranged along a second direction that intersects the first direction;
A sixth light emitting element and a seventh light emitting element that emit light of a third color different from the first color and the second color and are arranged along the first direction;
Have
The fourth light emitting element is disposed between the first light emitting element and the second light emitting element;
The sixth light emitting element is disposed between the first light emitting element and the fourth light emitting element;
The seventh light emitting element is disposed between the fourth light emitting element and the second light emitting element;
The light emitting layers of each of the first light emitting element, the second light emitting element, the third light emitting element, the fourth light emitting element, and the fifth light emitting element are formed by a coating method,
The organic EL device, wherein the light emitting layers of the sixth light emitting element and the seventh light emitting element are formed by vapor deposition or spin coating. The distance between the first light emitting element and the fourth light emitting element is substantially equal to the distance between the fourth light emitting element and the second light emitting element.
The distance between the third light emitting element and the fourth light emitting element is substantially equal to the distance between the fourth light emitting element and the fifth light emitting element. Organic EL device. Having the eighth light emitting element and the ninth light emitting element that emit light of the first color, sandwich the first light emitting element therebetween, and are arranged along the second direction;
The distance between the first light emitting element and the fourth light emitting element is substantially equal to the distance between the fourth light emitting element and the second light emitting element.
The distance between the third light emitting element and the fourth light emitting element is substantially equal to the distance between the fourth light emitting element and the fifth light emitting element.
A distance between the eighth light emitting element and the first light emitting element is substantially equal to a distance between the first light emitting element and the ninth light emitting element.
The sixth light emitting element is also disposed between the eighth light emitting element and the first light emitting element,
The organic EL device according to claim 1, wherein the seventh light emitting element is also disposed between the first light emitting element and the ninth light emitting element.   5. The organic EL device according to claim 1, wherein a light emitting layer included in the sixth light emitting element and a light emitting layer included in the seventh light emitting element are continuous.   The light emitting layer of the sixth light emitting element and the light emitting layer of the seventh light emitting element are formed by vapor deposition, and the light emitting layer of the sixth light emitting element is separated from the light emitting layer of the seventh light emitting element. The organic EL device according to claim 1, wherein the organic EL device is an organic EL device.   The organic EL device according to claim 1, wherein the third color is a blue color.   An electronic apparatus comprising the organic EL device according to claim 1.

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