JP5288657B2 - Light emitting device - Google Patents

Description

The present invention relates to a display device provided with an organic light emitting element.
In particular, the present invention relates to a display device (organic EL display) provided with a light-emitting element (organic light-emitting element) having an organic compound that can emit light by applying an electric field.
The present invention also relates to an electronic device using such a display device for a display portion.

An organic light-emitting element is luminescence generated by applying an electric field (Electro L).
An organic light-emitting element having a structure in which a layer (hereinafter referred to as an organic compound layer) containing an organic compound (organic light-emitting material) from which a luminescence is obtained is sandwiched between a pair of electrodes (a first electrode and a second electrode) . Organic light-emitting materials include a material that can convert energy when returning from the singlet excited state to the ground state (fluorescent material) and a material that can convert energy when returning from the triplet excited state to the ground state (emission). Phosphorescent material).

A display device (organic EL display) provided with such an organic light emitting element has features such as fast response speed suitable for moving image display, low voltage, low power consumption driving, and the like. It is attracting a great deal of attention as a next-generation display including terminals.

Unlike a liquid crystal display device, the organic EL display is self-luminous and has the advantage of no viewing angle problem. Therefore, it is more suitable than a liquid crystal display as a display used outdoors, and use in various forms has been proposed.

An organic light-emitting element that is provided on a light-transmitting substrate and emits light from both surfaces of the light-transmitting substrate (hereinafter referred to as a dual emission organic light-emitting element) is known (for example, see Patent Document 1).
This dual emission type organic light emitting device has a feature of emitting light in the direction of both sides of the substrate, and is expected to be applicable to various applications by utilizing this feature.

JP 2004-265691 A JP 2005-71693 A

Further, in Patent Document 2, the light emitting areas of the organic light emitting elements provided on the respective substrates are not overlapped with each other when the panels on which the double-sided emission type organic light emitting elements of different colors are formed. A display device that displays a full color image by superimposing on the screen is described.

An object of the present invention is to provide a display device that takes advantage of the above-described features of a dual emission type organic light emitting device.
It is another object of the present invention to improve the image quality of an organic EL display using a dual emission type organic light emitting element.
More specifically, there are the following three problems regarding the problem of improving the image quality.

First, the adjustment of the brightness of the display image is mentioned.
The appropriate display device brightness differs depending on whether the organic EL display is used indoors or outdoors where the ambient brightness is bright. It is also necessary to adjust the brightness of the device.

Next, improvement in chromaticity can be mentioned.
For example, when performing color display with three colors of red (R), green (G), and blue (B), in the chromaticity diagram, the chromaticity coordinates of red (R), the chromaticity coordinates of green (G), and blue Since only the color located inside the triangle having the chromaticity coordinate (B) as a vertex could be expressed, there was a limit to the range of colors that could be expressed. If the range of colors that can be expressed can be increased, the number of colors that can be expressed can be increased, and a more detailed and realistic image can be displayed.

Furthermore, there is a point of color balance.
It is known that the visibility varies depending on the color. Visibility is the sensitivity of the eyes to light, and the yellow-green wavelength near 555 nm has the highest visibility. The visibility decreases as the wavelength becomes shorter than 555 nm, and the visibility decreases as the wavelength becomes longer than 555 nm. Therefore, in three colors of red, green, and blue, the visibility of green is higher than that of red and blue. Therefore, it is necessary to balance the colors in consideration of the visibility.
Further, the blue organic light emitting device has a problem that the luminance is lower than that of the red and green organic light emitting devices. Therefore, it is necessary to be able to adjust the balance of red, green, and blue luminance.

  The present invention has been made in view of these problems.

The present invention
A first substrate provided with a plurality of organic light emitting elements, and a second substrate provided with organic light emitting elements,
The first substrate and the second substrate are provided facing each other,
At least one of the organic light emitting element provided on the first substrate or the organic light emitting element provided on the second substrate emits light in the direction of both surfaces of the substrate on which the organic light emitting element is formed,
The light emitting region of the organic light emitting device provided on the first substrate and the light emitting region of the organic light emitting device provided on the second substrate are arranged so as to overlap at least partially when viewed from the observer side. It is characterized by.

In order to obtain a structure in which the organic light emitting element emits light in both directions of the substrate on which the organic light emitting element is provided, the first electrode and the second electrode of the organic light emitting element may be formed of a transparent conductive film. .
Therefore, in the above configuration, “at least one of the organic light-emitting element provided on the first substrate or the organic light-emitting element provided on the second substrate is a substrate on which the organic light-emitting element is formed. The configuration “emits light in the direction of both sides” means that “the first organic light emitting element of at least one of the organic light emitting element provided on the first substrate or the organic light emitting element provided on the second substrate”.
In other words, the electrode and the second electrode are formed of a transparent conductive film.

Note that here, the first electrode of the organic light emitting element is provided on the substrate side on which the organic light emitting element is provided rather than the second electrode of the organic light emitting element.
Therefore, of the pair of electrodes of the organic light emitting element provided on the first substrate, the electrode provided on the first substrate side is the first electrode.

Further, the present invention provides the above-described configuration,
The first substrate is provided with a first organic light emitting element,
The second substrate is provided with a second organic light emitting element, a third organic light emitting element, and a fourth organic light emitting element,
One pixel is formed by the first to fourth organic light emitting elements.

Further, the present invention provides the above-described configuration,
The second substrate is provided with a first organic light emitting element,
The first substrate is provided with a second organic light emitting element, a third organic light emitting element, and a fourth organic light emitting element,
One pixel is formed by the first to fourth organic light emitting elements.

Further, the present invention provides the above-described configuration,
The first substrate is provided with a first organic light emitting element and a second organic light emitting element,
The first substrate is provided with a third organic light emitting element and a fourth organic light emitting element,
One pixel is formed by the first to fourth organic light emitting elements.

Furthermore, the present invention provides
The first to fourth organic light emitting elements are organic light emitting elements of different colors.

Further, the present invention provides the above-described configuration,
The first substrate is provided with a first organic light emitting element, a second organic light emitting element, and a third organic light emitting element,
The second substrate is provided with a fourth organic light emitting element, a fifth organic light emitting element, and a sixth organic light emitting element,
One pixel is formed by the first to sixth organic light emitting elements.

Furthermore, the present invention provides
The first to third organic light emitting devices are organic light emitting devices having different colors.

Furthermore, the present invention provides
The first to sixth organic light emitting elements are organic light emitting elements having different colors.

That is, according to the present invention, in the above configuration, red, green, blue, red complementary colors, green complementary colors,
2 or 3 colors selected from 4 to 6 colors, in which red, green and blue organic light emitting elements are added to 1 to 3 organic light emitting elements selected from blue complementary color and white An organic light emitting element is provided on a first substrate, and the remaining organic light emitting elements are provided on a second substrate.

Various combinations of the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are conceivable.
Therefore, the combination of the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate will be described more specifically in the following first to fourth configurations of the present invention.

The first configuration of the present invention is a configuration in which red, green, blue, and white organic light-emitting elements are provided on the first substrate or the second substrate. That is, one pixel is formed by organic light emitting elements of four colors of red, green, blue, and white.

Note that in this specification, a minimum unit necessary for displaying an image is referred to as a pixel, and the pixel is configured by a plurality of dots. For example, in the case of displaying an image with three colors of red, green, and blue, one pixel is formed by combining three dots of red, green, and blue.

Therefore, in the first configuration of the present invention, it can be said that pixels are formed by red dots, green dots, blue dots, and white dots.

As the first configuration of the present invention, for example, a red, green, or blue organic light emitting element is provided on one of the first substrate and the second substrate, and the other of the first substrate and the second substrate is provided. An example in which a white organic light-emitting element is provided on a substrate is given.

The brightness of the entire display screen of the display device can be improved by providing the white organic light-emitting element on a substrate different from the substrate on which the red, green, and blue organic light-emitting elements are provided.

When using an organic EL display as a display unit of an electronic device that is used outdoors or indoors, such as a mobile phone or a personal digital assistant, the brightness of the screen is set according to the ambient brightness. If it is not adjusted, visibility will deteriorate.
In such a case, only the brightness of the white organic light-emitting element provided on a substrate different from the substrate provided with the red, green, and blue organic light-emitting elements is increased to increase only the brightness of the screen. Can do.

Since the substrate provided with the white organic light emitting element is provided separately from the substrate provided with the red, green and blue organic light emitting elements for performing color display, the red, green and blue organic light emitting elements and Can independently change the luminance of the white organic light emitting device. Therefore, it is possible to easily adjust the brightness of the display screen.

Moreover, usually, when performing white display on an organic EL display capable of color display,
Red, green, and blue organic light-emitting elements emit light, and these three colors are mixed to perform white display. However, in the case of displaying white by providing a structure in which a substrate provided with red, green, and blue organic light emitting elements and a substrate provided with white organic light emitting elements are provided to overlap each other as in the present invention. Only the white organic light-emitting element can emit light, and the red, green, and blue organic light-emitting elements can emit no light. Therefore, power consumption can be reduced as compared with a case where white display is performed by emitting light from a red organic light emitting element, a green organic light emitting element, or a blue organic light emitting element.

The arrangement of the red, green, and blue organic light-emitting elements and the white organic light-emitting element may be any of the following cases (A) and (B), for example.

(A) One dot of a red organic light emitting element provided on the first substrate, 1 of a green organic light emitting element
One dot of the white organic light emitting element is provided on the second substrate so as to face the region where the dot and one dot of the blue organic light emitting element are formed.

(B) Red organic light-emitting element dots on the first substrate, green organic light-emitting element dots, and blue organic light-emitting element dots on positions on the second substrate facing the regions where the dots are provided. A white organic light emitting element dot is provided. That is, the white organic light emitting element 1 dot is provided on the second substrate so as to face the red organic light emitting element 1 dot provided on the first substrate,
A white organic light emitting element (1 dot) is provided on the second substrate so as to face the green organic light emitting element (1 dot) provided on the first substrate, and a blue organic light emitting element is provided on the first substrate. A white organic light emitting element (1 dot) is provided on the second substrate so as to face the element (1 dot).

In the case of (B) above, a white organic light emitting element formed at a position facing each light emitting region of the red organic light emitting element, green organic light emitting element, and blue organic light emitting element provided on the first substrate Can be controlled independently, so that the respective colors of red, green and blue can be adjusted. That is, for example, by emitting light only from the white organic light emitting element provided at the position facing the red organic light emitting element, a pink color is displayed by a mixed color of red and white, and green and blue are the same colors. Can be displayed, and color reproducibility can be further improved.

In the above (A) and (B), red, green, and blue organic light emitting elements are provided on the first substrate, and the second
Although the case where the white organic light emitting element is provided on the substrate is described as an example, a configuration in which the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are interchangeable is also possible. is there. That is, a white organic light emitting element may be provided on the first substrate, and red, green, and blue organic light emitting elements may be provided on the second substrate.

Moreover, although the example demonstrated above demonstrated the structural example in which only the white organic light emitting element was provided in one board | substrate, any one color of red, green, and blue was provided with the white organic light emitting element. It is good also as a structure which forms in a board | substrate, and provides the organic light emitting element of 2 colors other than the color provided in the same board | substrate as a white organic light emitting element among red, green, and blue.
That is, for example, one of the first substrate and the second substrate is provided with red and green organic light emitting elements, and the other substrate of the first substrate or the second substrate is blue and white. The organic light emitting element may be provided.

One of the first substrate and the second substrate is provided with a white organic light emitting element and an organic light emitting element of one color of red, green, and blue, and the other of the first substrate and the second substrate The organic light emitting element of the remaining two colors of red, green, and blue (two colors other than the color of the organic light emitting element provided on one of the first substrate and the second substrate) is provided on the substrate. The red, green, and blue can be balanced by increasing the area of the light emitting region of the red organic light emitting device and the blue organic light emitting device as compared with the area of the light emitting region of the green organic light emitting device. this is,
This is because red and blue have lower visibility than green.

In addition, since the organic light emitting elements provided on the first substrate and the second substrate have two colors, respectively, the number of pixels provided on the substrate is the same, and three colors of organic light emitting elements are provided on the substrate. In comparison, since the number of elements for driving the organic light emitting elements provided in each dot can be reduced, the aperture ratio can be improved.

In the second configuration of the present invention, the first substrate or the second substrate has red, green, and blue organic light emitting elements and one to three colors selected from red complementary color, green complementary color, and blue complementary color. An organic light emitting element is provided. In other words, in addition to red, green, and blue, one pixel is formed by organic light emitting elements of 4 to 6 colors that combine 1 to 3 colors selected from a complementary color of red, a complementary color of green, and a complementary color of blue. .

As the second configuration of the present invention, for example, on one of the first substrate and the second substrate,
Red, green, and blue organic light emitting elements are provided, and the other substrate of the first substrate or the second substrate is
Examples include providing organic light emitting elements of 1 to 3 colors selected from red complementary colors, green complementary colors, or blue complementary organic light emitting elements.

The complementary color of red is blue-green (cyan), the complementary color of blue is yellow (yellow), and the complementary color of green is magenta (magenta).
By forming organic light emitting elements of these colors, it is possible to express colors that could not be expressed only with red, blue, and green, and the range of colors that can be expressed can be expanded, greatly improving color reproducibility. can do.

Note that it is not always necessary to form complementary organic light emitting elements for all three colors of red, green, and blue. The color type and the number of colors of the organic light emitting elements provided on the second substrate can be changed according to the image quality required for the image to be displayed. That is, one to three colors may be selected from the red complementary color, the green complementary color, and the blue complementary color according to the required image quality.

Moreover, although the structural example demonstrated above showed the example which provided the organic light emitting element of red, green, and blue in one board | substrate of a 1st board | substrate or a 2nd board | substrate, it is not limited to this. Two organic light emitting elements of red, green, and blue are provided on one substrate, and the remaining organic light emitting elements of red, green, and blue are combined with red complementary color, green complementary color, and blue complementary color. It is good also as a structure which provides the organic light emitting element of 1 or 2 colors chosen from the other on the other board | substrate.

Since red and blue have lower visibility than green, in the above configuration, the area of the light emitting region of the red organic light emitting element and the blue organic light emitting element is made larger than the area of the light emitting region of the green organic light emitting element. For example, it is possible to balance red, green and blue.

As an example of such a configuration,
A red organic light emitting device is provided on the first substrate,
A blue organic light emitting device is provided on the second substrate,
A green organic light emitting element is provided on one of the first substrate and the second substrate,
An organic light emitting element of one color selected from a complementary color of red, a complementary color of green, and a complementary color of blue is provided on the other substrate of the first substrate or the second substrate,
There is an example in which the area of the light emitting region of the red organic light emitting device and the blue organic light emitting device is made larger than the area of the light emitting region of the green organic light emitting device.

Further, when the organic light emitting elements provided on the first substrate and the second substrate have two colors, respectively, the number of pixels provided on the substrate is the same, and the organic light emitting elements of three colors are provided on the substrate. In comparison, since the number of elements for driving the organic light emitting elements provided in each dot can be reduced, the aperture ratio can be improved.

In addition, in the second configuration of the present invention, the emission color of the organic light emitting element may be red chromaticity coordinates, green chromaticity coordinates, blue chromaticity coordinates in addition to red complementary color, green complementary color, and blue complementary color. Any color can be used as long as the range of the triangle with the apex can be expanded. Therefore, an organic light emitting element that emits light of a color having a chromaticity coordinate outside the range of a triangle having the chromaticity coordinate of red, the chromaticity coordinate of green, and the chromaticity coordinate of blue as a vertex may be used.
Therefore, instead of the complementary color of red, the complementary color of green, and the complementary color of blue, the color having a chromaticity coordinate outside the range of a triangle having the chromaticity coordinates of red, the chromaticity coordinates of green, and the chromaticity coordinates of blue as vertices. 1 to emit light
It is good also as a structure which provides the organic light emitting element of 3 colors.

The third configuration of the present invention is:
In this configuration, red, green, and blue organic light-emitting elements are provided on the first substrate and the second substrate.
That is, one pixel is formed by the red, green, and blue organic light emitting elements provided on the first substrate and the red, green, and blue organic light emitting elements provided on the second substrate.

In the third configuration of the present invention, when the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate overlap each other when viewed from the observer side, Display with higher luminance can also be performed. Therefore, more gradations can be expressed.

At this time, if at least a part of the light emitting regions of the organic light emitting elements of the same color overlap, display with higher luminance can be performed, but the area where the light emitting regions of the organic light emitting elements of different colors overlap A larger value is preferable because a decrease in the aperture ratio can be prevented. That is, the first
The aperture ratio is the highest when the light emitting region of the organic light emitting element provided on the substrate and the light emitting region of the organic light emitting element provided on the second substrate overlap in the same region at substantially the same position when viewed from the observer side. can do.

In the third configuration of the present invention, the light emitting regions of the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are so that different colors overlap each other when viewed from the observer side. Then, the resolution of the image can be improved.

At this time, if at least a part of the light emitting regions of the organic light emitting elements of different colors overlap, the resolution of the image can be improved, but the area where the light emitting regions of the organic light emitting elements of different colors overlap is larger. However, it is preferable because a decrease in the aperture ratio can be prevented. That is, when the light emitting region of the organic light emitting element provided on the first substrate and the light emitting region of the organic light emitting element provided on the second substrate overlap in the same region at substantially the same position when viewed from the observer side, The aperture ratio can be increased.

The fourth configuration of the present invention is as follows.
In this configuration, red, green, and blue organic light emitting elements are provided on the first substrate, and blue organic light emitting elements are provided on the second substrate.
That is, one pixel is formed by the red, green, and blue organic light emitting elements provided on the first substrate and the blue organic light emitting element provided on the second substrate.

Since the blue organic light emitting device has low luminance, the blue light emitting luminance can be supplemented by forming the blue organic light emitting device on the second substrate, and the balance of the red, blue and green luminance is improved. be able to.

In the fourth configuration, a white organic light-emitting element may also be provided on a substrate on which a blue organic light-emitting element is provided.
By providing a white organic light emitting element, it is possible to compensate for blue light emission luminance and adjust the brightness of the display screen.

In the fourth configuration, the substrate on which the blue organic light emitting element is provided is also provided with one or two colors of organic light emitting elements among red complementary color, green complementary color, or blue complementary color. Also good.
By providing one or two organic light emitting elements from among the complementary colors of red, green, or blue, the range of colors that can be complemented and can be expressed can be expanded.

The following two methods are conceivable for the arrangement of the first substrate and the second substrate of the display device of the present invention described above.

First, as a first arrangement method, the surface of the first substrate on which the organic light emitting element is formed,
This is a method of disposing the substrate facing the surface on which the organic light emitting element is formed.

With this arrangement, the second substrate functions as a counter substrate for the first substrate, and the first substrate functions as a counter substrate for the second substrate. Sealing can be performed with only two substrates, the first substrate and the second substrate. Therefore, the organic light emitting element is formed only on one substrate, and the thickness can be made almost the same as that of a normal display device sealed by the counter substrate.

In the second arrangement method, the surface of the first substrate on which the organic light emitting element is formed and the surface of the second substrate opposite to the surface on which the organic light emitting element is formed face each other. It is a method to do.

In the case of the second arrangement method, the second substrate functions as a counter substrate with respect to the first substrate. Therefore, the first substrate can be sealed with the second substrate. However, the second substrate cannot be sealed only with the first substrate and the second substrate. Therefore, the second substrate is sealed by providing a third substrate so as to face the surface of the second substrate on which the organic light emitting element is formed.

Therefore, since the first arrangement method can perform sealing with fewer substrates than the second arrangement method, the cost is lower and the thickness of the panel after bonding can be reduced. This is preferable because it is possible.

In addition, about the method of bonding and sealing a 1st board | substrate and a 2nd board | substrate, the method of bonding together with a sheet-like sealing agent, and apply | coating and bonding a solid sealing agent to the whole bonding surface of a board | substrate Various known methods such as a method and a method in which a sealing agent is applied only around the substrate and the filler is filled and bonded together can be used.

Using a method in which a solid sealing agent is applied to the entire attachment surface of the substrate and affixed, and the air is not present between the first substrate and the second substrate, the light extraction efficiency is increased. Can do.

  Each configuration of the first and second arrangement methods will be described in more detail below.

In the first arrangement method, the following three cases (1) to (3) are conceivable.
(1) The first substrate and the second substrate are translucent substrates, and the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are provided on both surfaces of each substrate. Emits light in the direction.
(2) The first substrate is a light-transmitting substrate, and the organic light emitting element provided on the first substrate emits light in the direction of both surfaces of the first substrate, and the organic light emission provided on the second substrate. The element emits light in the direction of the surface of the second substrate on which the organic light emitting element is provided, that is, in the direction of the first substrate.
(3) The second substrate is a light-transmitting substrate, and the organic light emitting element provided on the first substrate is the direction of the surface of the first substrate on which the organic light emitting element is provided, that is, the second substrate. Emits light in the direction of
The organic light emitting element provided on the substrate emits light in the direction of both surfaces of the second substrate.

In the case of (1), a display screen is formed on the first substrate and the second substrate, an image visually recognized on the display screen formed on the first substrate, and a display screen formed on the second substrate The image visually recognized in FIG. 2 is a mirror image. In addition, since the first substrate and the second substrate are light-transmitting substrates, the display screen and the first substrate on the first substrate can be seen through the first substrate and the second substrate in a state where the scenery on the other side can be seen through. A display screen on the second substrate is formed.

In addition, by providing polarizing plates on the first substrate and the second substrate, both the first substrate and the display screen formed on the first substrate and the display screen formed on the second substrate It is also possible to hide the scenery on the other side through the second substrate.

In the case of (2), the display screen is formed only on the first substrate, and in the case of (3), the display screen is formed only on the second substrate.

In the second arrangement method, the following three cases (4) to (6) are conceivable.
(4) The first substrate and the second substrate are translucent substrates, and the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are provided on both surfaces of each substrate. Emits light in the direction.
(5) The first substrate is a translucent substrate, and the organic light emitting element provided on the first substrate emits light in the direction of both surfaces of the first substrate, and the organic light emission provided on the second substrate. The element emits light in the direction of the surface opposite to the surface on which the organic light emitting element of the second substrate is provided, that is, in the direction of the first substrate.
(6) The second substrate is a light-transmitting substrate, and the organic light emitting element provided on the first substrate is the direction of the surface of the first substrate on which the organic light emitting element is provided, that is, the second substrate. Emits light in the direction of
The organic light emitting element provided on the substrate emits light in the direction of both surfaces of the second substrate.

In the case of (4), the display screen is formed on the first substrate and the second substrate, the image visually recognized on the display screen formed on the first substrate, and the display screen formed on the second substrate The image visually recognized in FIG. 2 is a mirror image. Further, since the first substrate and the second substrate are light-transmitting substrates, the display screen is formed in a state where the scenery on the other side can be seen through the first substrate and the second substrate.

In addition, by providing polarizing plates on the first substrate and the second substrate, both the first substrate and the display screen formed on the first substrate and the display screen formed on the second substrate It is also possible to hide the scenery on the other side through the second substrate.

In the case of (5), the display screen is formed only on the first substrate, and in the case of (6), the display screen is formed only on the second substrate.

In the present invention, a quartz substrate, a glass substrate, a plastic substrate, or the like is used as the light-transmitting substrate. A quartz substrate is used when a heat treatment at a temperature exceeding 600 ° C. is involved in a process for manufacturing an element such as a thin film transistor or an organic light emitting device on the substrate. A substrate may be used.
Here, the translucent substrate refers to a substrate that is transparent to visible light, and that it is transparent to visible light means that the transmittance of visible light is 80 to 100%.

In the above (2) and (5), a light-transmitting substrate is used as the first substrate. However, the second substrate is not particularly limited to a light-transmitting substrate, and a substrate having no light-transmitting property is used. It may be used.

In the above (3) and (6), a translucent substrate is used as the second substrate.
The substrate is not particularly limited to a light-transmitting substrate, and a substrate having no light-transmitting property may be used.

In the structure of the present invention described above, an active matrix display device is preferable.

In this specification, an organic light-emitting element includes not only a structure in which the entire film sandwiched between the first electrode and the second electrode is an organic compound but also an inorganic compound or the like in part. Including those that are present.

Organic light-emitting materials include a material that can convert energy when returning from the singlet excited state to the ground state (fluorescent material) and a material that can convert energy when returning from the triplet excited state to the ground state (emission). Phosphorescent material), and any of the organic light emitting materials used in the display device of the present invention may be used.

The structure of the organic compound layer is the structure in which the hole transport layer, the light emitting layer, and the electron transport layer are stacked in this order, the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, and the electron injection layer. Various known structures such as a stacked structure can be used.

In the display device of the present invention, a driving method for screen display is not particularly limited, and for example, a dot sequential driving method, a line sequential driving method, a surface sequential driving method, or the like may be used. In addition, as a method for expressing the gradation of the organic light emitting element, a digital gradation or an analog gradation may be used. Note that a signal input to the source line of the display device may be an analog signal or a digital signal, and a driver circuit or the like may be designed in accordance with a video signal as appropriate.

In addition to the substrate provided with the red, green, and blue organic light emitting elements, by providing the substrate provided with the white organic light emitting elements, only the luminance of the white organic light emitting elements can be increased. Only the screen brightness can be increased.
Since the substrate on which the white organic light emitting element is formed is provided separately from the substrate on which the organic light emitting element for performing color display is formed, the white light emitting device independently of the red, green, and blue organic light emitting devices is provided. The luminance of the organic light emitting device can be changed. Therefore, it is possible to easily adjust the brightness of the display screen.

Moreover, usually, when performing white display on an organic EL display capable of color display,
Red, green, and blue organic light-emitting elements emit light, and these three colors are mixed to perform white display. However, in the case of displaying white by adopting a configuration in which a substrate provided with a white organic light-emitting element is provided separately from a substrate provided with red, green, and blue organic light-emitting elements as in the present invention. Can cause only white organic light emitting elements to emit light, and red, green, and blue organic light emitting elements can emit no light. Therefore, power consumption can be reduced as compared with a case where white display is performed by emitting light from a red organic light emitting element, a green organic light emitting element, or a blue organic light emitting element.

By making the area of the light emitting region of the red organic light emitting device and the blue organic light emitting device larger than the area of the light emitting region of the green organic light emitting device, it is possible to balance red, green and blue.

Apart from red, green, and blue organic light emitting elements, organic light emitting light that can expand the range of triangles with red chromaticity coordinates, green chromaticity coordinates, and blue chromaticity coordinates as vertices. In the case where a light emitting element is provided, colors in a range that cannot be expressed only with three colors of red, green, and blue can be expressed, so that a more detailed and realistic image can be displayed.

In addition, red, green, and blue organic light emitting elements are provided on the first substrate, and red, green, and blue organic light emitting elements are provided on the second substrate, and the first substrate is provided on the first substrate as viewed from the observer side. By making the different colors of the organic light emitting element and the organic light emitting element provided on the second substrate overlap, the resolution of the image can be improved.

In addition to the substrate provided with the red, green, and blue organic light emitting elements, the blue light emitting luminance can be compensated by overlapping the substrate provided with the blue organic light emitting elements. The brightness balance can be improved.

The figure which shows the perspective view of the display apparatus of this invention. FIG. 6 is a top view illustrating a pixel structure of the display device described in Embodiment 1; FIG. 6 illustrates a cross-sectional structure of one pixel of the display device described in Embodiment 1; FIG. 6 illustrates a cross-sectional structure of one pixel of the display device described in Embodiment 1; FIG. 6 illustrates a cross-sectional structure of one pixel of the display device described in Embodiment 1; FIG. 9 is a top view illustrating a pixel structure of a display device described in Embodiment 3. FIG. 10 shows a cross-sectional structure of one pixel of a display device described in Embodiment 3; FIG. 10 shows a cross-sectional structure of one pixel of a display device described in Embodiment 3; FIG. 9 is a top view illustrating a pixel structure of a display device described in Embodiment 3. FIG. 10 shows a cross-sectional structure of one pixel of a display device described in Embodiment 3; FIG. 10 shows a cross-sectional structure of one pixel of a display device described in Embodiment 3; FIG. 10 is a top view illustrating a pixel structure of a display device described in Embodiment 4; FIG. 6 illustrates a cross-sectional structure of one pixel of a display device described in Embodiment 4; FIG. 7 is a top view illustrating a pixel structure of a display device described in Embodiment 6. FIG. 10 shows a cross-sectional structure of one pixel of a display device described in Embodiment 6; 10A and 10B illustrate an effect of a display device described in Embodiment 6; 10A and 10B illustrate an effect of a display device described in Embodiment 6; FIG. 6 is a top view illustrating a pixel structure of a display device described in Embodiment Mode 2; FIG. 5 shows a cross-sectional structure of one pixel of a display device described in Embodiment Mode 2; 3 is a top view illustrating a pixel structure of a display device described in Embodiment 1. FIG. 9 is a cross-sectional view illustrating a pixel structure of a display device described in Example 2. FIG. 9 is a cross-sectional view illustrating a pixel structure of a display device described in Example 2. FIG. Sectional drawing which shows the display apparatus of Example 3. FIG. Sectional drawing which shows the display apparatus of Example 3. FIG. FIG. 10 illustrates an electronic device described in Example 4; FIG. 10 illustrates an electronic device described in Example 4; FIG. 9 is a top view illustrating a pixel structure of a display device described in Embodiment 3. FIG. 10 shows a cross-sectional structure of one pixel of a display device described in Embodiment 3; FIG. 7 is a top view illustrating a pixel structure of a display device described in Embodiment 6. FIG. 10 shows a cross-sectional structure of one pixel of a display device described in Embodiment 6; FIG. 6 is a cross-sectional view of a display device according to a fourth embodiment.

  Embodiments of the present invention will be described below.

(Embodiment 1)
In this embodiment mode, a display device in which a substrate on which a white organic light-emitting element is formed and a substrate on which red (R), green (G), and blue (B) organic light-emitting elements are formed is attached. explain.
A perspective view of the display device of the present invention is shown in FIG.
In FIG. 1, 100 is a first substrate on which red (R), green (G), and blue (B) organic light emitting elements are formed, and 101 is a second substrate on which white organic light emitting elements are formed. , 102
Is a display screen, 103 and 104 are FPC (Flexible printed circuit)
It), 130 and 131 are peripheral drive circuits.
A pixel portion (not shown) in which a plurality of organic light emitting elements are formed and a peripheral driving circuit 130 are formed on the first substrate 100, and a pixel in which a plurality of organic light emitting elements are formed on the second substrate. Department (
And a peripheral drive circuit 131 are formed. First substrate 100 and second substrate 10
As shown in the figure, 1 is laminated and bonded so that the surfaces on which the organic light emitting elements are formed face each other.
A display screen 102 is formed on the first substrate 100.

Although FIG. 1 shows the case where the peripheral driver circuit is formed on the first substrate and the second substrate, the present invention is not limited to the case where the peripheral driver circuit is formed. A structure may be employed in which a driver circuit is formed in an IC and the IC is connected by a TAB method, a COG method, or the like.

FIG. 2 shows a pixel configuration of the display device of this embodiment. 2A shows a pixel configuration when viewed from the display screen 102 side, that is, an observer side, FIG. 2B shows a pixel configuration on the first substrate, and FIG. 2C shows a second configuration. The pixel structure in a board | substrate is shown. 2B and 2C are top views as seen from the surface side on which the organic light emitting element is formed.
The first substrate having the pixel configuration shown in FIG. 2B and the second substrate having the pixel configuration shown in FIG. 2C are overlapped so that the surfaces on which the organic light-emitting elements are formed face each other. Thus, when viewed from the display screen 102 side, that is, from the observer side, the pixel configuration is as shown in FIG.
In FIG. 2, wiring and the like are not shown for easy understanding of how the light emitting regions overlap.

In FIG. 2B, 201 is a red light emitting region formed by a red organic light emitting element,
202 is a green light emitting region formed by a green organic light emitting element, and 203 is a blue light emitting region formed by a blue organic light emitting element.
In FIG. 2C, reference numeral 204 denotes a white light emitting region formed by a white organic light emitting element.

In FIG. 2, the obliquely hatched portion on the right side indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate.
Therefore, when the first substrate and the second substrate are overlapped, when viewed from the observer side, FIG.
As shown in A), a part of the white light emitting region is shielded from light by the light shielding portion of the first substrate.

When all of the red light emitting area 201, the green light emitting area 202, the blue light emitting area 203, and the white light emitting area 204 of the second substrate are made to emit light, the light emitting area 205 is viewed from the observer side.
, 206, and 207, it appears that light emitting regions of three different colors are formed.
In this case, a red light emitting region brightened by white light emission is formed in 205.
In 206, a green light emitting region brightened by white light emission is formed. In 207, a blue light emitting region brightened by white light emission is formed.

Note that in 205, 206, and 207 in FIG. 2A, the color of the light-emitting region of the second substrate is shown in parentheses.
That is, “R” and “(W)” in 205 indicate that the red light emitting region of the first substrate and the white light emitting region of the second substrate overlap, “G”, “(W
")" Indicates that the green light-emitting region of the first substrate and the white light-emitting region of the second substrate overlap, and 207 indicates "B" and "(W)". This indicates that the blue light emitting region of the first substrate and the white light emitting region of the second substrate overlap.

FIG. 3 shows a cross-sectional view of the pixel configuration shown in FIG. 3A is a cross-sectional view taken along the line AA ′ in FIG. 2A, and FIG. 3B is a cross-sectional view taken along the line BB ′ in FIG. FIG. 3 is a cross-sectional view for clearly showing the positional relationship between the organic light emitting elements provided on the first substrate and the organic light emitting elements provided on the second substrate in the display device of the present invention. Accordingly, only the first substrate, the red, green, and blue organic light emitting elements formed on the first substrate, the second substrate, and the white organic light emitting element formed on the second substrate are shown. . That is, in the actual cross-sectional structure, the organic light emitting element is not provided in contact with the substrate, but an insulating film or the like is provided between the substrate and the organic light emitting element. Items other than are omitted. The same applies to cross-sectional views in the following embodiments and examples.
Examples of detailed cross-sectional structures will be described later in Examples.

3A, a red (R) organic light emitting element 121, a green (G) organic light emitting element 122, and a blue (B) organic light emitting element 123 are formed on the first substrate 100. In FIG. A white organic light emitting device 120 is formed on the second substrate 101. And FIG. 3 (A
), The first substrate 100 and the second substrate 101 include a red organic light-emitting element 121, a green organic light-emitting element 122, and a blue organic light-emitting element 1 formed on the first substrate 100.
23 and the white organic light emitting element 120 formed on the second substrate are provided so as to face each other.

With such a structure, the second substrate 101 functions as a counter substrate with respect to the first substrate 100, and the first substrate 100 functions as a counter substrate with respect to the second substrate 101. Therefore, sealing can be performed using only two substrates, the first substrate 100 and the second substrate 101. Therefore, the organic light emitting element is formed only on one substrate, and the thickness can be made almost the same as that of a normal display device sealed by the counter substrate.

The organic light emitting devices 121, 122, and 123 formed on the first substrate 100 include the direction of the surface on which the organic light emitting devices 121, 122, and 123 of the first substrate 100 are provided, and the first substrate 100. It has a dual emission type structure that emits light in the direction of the surface opposite to the surface on which the organic light emitting elements 121, 122, and 123 are provided. In addition, the white organic light emitting element 120 formed on the second substrate 101 is in the direction of the surface of the second substrate 101 where the white organic light emitting element 120 is provided, that is, in the direction of the first substrate. It has a structure of a top emission type (top emission type) that emits light.
In FIG. 3A, white arrows indicate the directions of light emission from the respective organic light emitting elements.

With such a configuration, the white organic light emitting device 120 and the organic light emitting device 12 are provided.
1, 122, 123 emit light from the organic light emitting elements 121, 122, 1, of the first substrate 100.
It can be taken out in the direction of the surface opposite to the surface on which 23 is formed. That is, a display screen can be formed on the surface of the first substrate 100 opposite to the surface on which the organic light emitting elements 121, 122, and 123 are formed. Therefore, the organic light emitting devices 121 and 12 of the first substrate 100 are used.
An image whose brightness is adjusted by the light emission of the white organic light emitting element 120 can be displayed on the surface opposite to the surface on which 2 and 123 are formed.

The red organic light-emitting element 121 includes the first electrode 110, the second electrode 108, and the first electrode 11.
The layer 109 includes an organic compound sandwiched between 0 and the second electrode 108. The green organic light-emitting element 122 includes a first electrode 113, a second electrode 111, and a layer 112 containing an organic compound sandwiched between the first electrode 113 and the second electrode 111. The blue organic light-emitting element 123 includes a first electrode 116, a second electrode 114, a first electrode 116, and a second electrode.
A layer 115 containing an organic compound sandwiched between the electrodes 114.

Then, the first electrode 110 and the second electrode 108 of the red organic light emitting element 121, the first electrode 113 of the green organic light emitting element 122, the second electrode 111, and the first of the blue organic light emitting element 123. The electrode 116 and the second electrode 114 are each made of indium tin oxide (ITO: Ind
Ium Tin Oxide) or IZO (Indi) containing zinc oxide in indium oxide
um Zinc Oxide) or the like.
The material used for the transparent conductive film is not limited to these materials, and a metal thin film or the like can also be used.

The first electrode 110 of the red organic light emitting element 121, the first electrode 113 of the green organic light emitting element 122, and the first electrode 116 of the blue organic light emitting element 123 are formed by patterning the same transparent conductive film. Is formed. The second electrode 108 of the red organic light emitting element 121, the second electrode 111 of the green organic light emitting element 122, and the second electrode 114 of the blue organic light emitting element 123 are formed by patterning the same transparent conductive film. Is formed.

Thus, by forming the first and second electrodes of each organic light emitting element with a transparent conductive film, a dual emission type organic light emitting element can be obtained.

The white organic light emitting element 120 includes the first electrode 105, the second electrode 107, and the first electrode 10.
5 and a layer 106 containing an organic compound sandwiched between the second electrode 107 and the second electrode 107.

As the first electrode 105 of the white organic light emitting element 120, an electrode having a reflection function is preferably used. Since the first electrode has a reflection function, the red organic light emitting element 121 is provided.
The light emitted from the green organic light-emitting element 122 and the blue organic light-emitting element 123 in the direction toward the second substrate 101 can be reflected by the first electrode 105 of the white organic light-emitting element 120. Light emission of the organic light emitting device 121, the green organic light emitting device 122, and the blue organic light emitting device 123 can be used efficiently.

As a material for forming an electrode having a reflection function, for example, a highly reflective metal film such as an aluminum film (including an aluminum alloy film or an aluminum film containing an additive) or a silver thin film can be given. Note that the first electrode 105 only needs to reflect light emitted from the organic light-emitting element formed on the second substrate, and thus the first electrode 105 does not need to have a reflective function as a whole. Therefore,
What laminated | stacked the transparent conductive film on the metal with a high reflectance can also be used. Further, at least the outermost surface of the first electrode 105 is formed of a highly reflective metal film, for example, a conductive material in which the surface (the surface facing the second substrate) is plated with aluminum or silver. A film or the like may be used.

In addition, by using an electrode having a reflection function as the first electrode 105 of the white organic light emitting element 120, light emitted from the organic light emitting elements 121, 122, and 123 in the direction toward the second substrate 101 is first. It can be reflected by the electrodes. Therefore, it is preferable that the first electrode 105 of the white organic light emitting element 120 overlaps with all the light emitting regions formed by the organic light emitting elements 121, 122, and 123. By doing in this way, the light emission from the organic light emitting element 121,122,123 can be used effectively.

As the second electrode 107 of the white organic light emitting element 120, indium tin oxide (ITO
: Indium Tin Oxide) or IZO containing zinc oxide in indium oxide (
A transparent conductive film such as Indium Zinc Oxide) is used.
The material used for the transparent conductive film is not limited to these materials, and a metal thin film or the like can also be used.

Since the display device of this embodiment is arranged so that white pixels overlap red pixels, green pixels, and blue pixels, display is performed by changing only the luminance of the white organic light-emitting elements. The screen brightness can be adjusted.

The red, green, and blue organic light-emitting devices have different current-luminance characteristics, so if you want to change only the brightness of the entire display screen, keep the balance of red, green, and blue. However, the brightness of the red, green, and blue organic light emitting elements must be changed so that the overall brightness changes. However, in the display device of this embodiment, only the brightness of the entire display screen can be changed by changing only the luminance of the white organic light emitting element.

Therefore, if a light sensor for detecting the ambient brightness is provided and the luminance of the white organic light emitting element is changed according to the ambient brightness detected by the light sensor, the display device can be used. The brightness of the entire display screen can be changed according to the brightness of the surroundings.

In addition, since the display device of this embodiment is arranged so that the white dots overlap the red dots, green dots, and blue dots, the red, green, and blue organic light emitting elements are turned off. By displaying only the white organic light-emitting element in the lighting state, it is possible to display only in white.

In a display device that performs color display using normal red, green, and blue dots as one pixel, white display is performed by lighting the red, green, and blue dots when performing white display. In the case of the configuration of the present embodiment, since the white organic light emitting element is formed on a substrate different from the substrate on which the red, green, and blue organic light emitting elements are formed, only the white organic light emitting element is turned on. Since one pixel can be displayed, power consumption can be reduced compared to the case where white display is performed by lighting red, green, and blue dots.

In addition, when the white organic light-emitting element is formed on the same substrate as the red, green, and blue organic light-emitting elements, the number of dots formed on one substrate increases. The number will decrease. However, in the configuration of the present embodiment, the white organic light emitting element is formed on a substrate different from the substrate on which the red, green, and blue organic light emitting elements are formed, so that the number of pixels is not reduced. In addition, when both color display and white display can be performed and only white display is performed, power consumption can be reduced.

In this embodiment, as shown in FIGS. 2 and 3A, a dual emission red organic light emitting element, a green organic light emitting element, and a blue organic light emitting element are formed on a first substrate. Although an example is shown in which a top emission type white organic light emitting element is formed on the second substrate and a display screen is formed on the first substrate side, the present invention is not limited to this configuration.

For example, as shown in FIG. 4, the organic light emitting element provided on the first substrate may be replaced with the organic light emitting element provided on the second substrate.

In FIG. 4, the same symbols are attached to the same components as those in FIG.
4 is different from the structure in FIG. 3A in that the organic light-emitting element provided on the first substrate 100 and the organic light-emitting element provided on the second substrate 101 are interchanged.

That is, the white organic light emitting element 120 is provided on the first substrate, and the red, green, and blue organic light emitting elements 121, 122, and 123 are provided on the second substrate. The electrode 105 and the second electrode 107 are formed of a transparent conductive film, and the second electrodes 108, 111, and 114 of the red, green, and blue organic light emitting devices 121, 122, and 123 are formed of a transparent conductive film. The first electrodes 1 of the red, green, and blue organic light emitting devices 121, 122, and 123
10, 113, and 116 are formed of electrodes having a reflection function, which is different from the structure of FIG.

When the display screen is provided only on the first substrate side, the organic light emitting element provided on the first substrate is:
A dual emission type organic light emitting element is used, and the organic light emitting element provided on the second substrate is a top emission type organic light emitting element. Therefore, in the configuration shown in FIG. 4, the white light emitting element 120 is a dual emission type, and the red, green, and blue organic light emitting elements 121, 122, and 123 are a top emission type.
In FIG. 4, white arrows indicate the directions of light emission from the respective organic light emitting elements.

3A and 4 illustrate the case where the display screen is formed only on the first substrate, the display screen is formed on both the first substrate and the second substrate. Also good.

FIG. 5 shows a configuration example in which display screens are formed on both the first substrate and the second substrate.
Also in FIG. 5, the same symbols are attached to the same components as those in FIG.

5 is different from FIG. 3A in that the first electrode 105 of the white organic light emitting element 120 provided on the second substrate 101 is formed of a transparent conductive film.
In FIG. 5, white arrows indicate the directions of light emission from the respective organic light emitting elements.

The first and second electrodes of the organic light emitting devices 121, 122, and 123 provided on the first substrate and the white organic light emitting device 120 provided on the second substrate are all formed of a transparent conductive film. Therefore, the organic light emitting elements 121, 122, 123 provided on the first substrate and the white organic light emitting element 120 provided on the second substrate are all dual emission type organic light emitting elements. Therefore, as shown in FIG. 4, since light is emitted from both the first substrate 100 and the second substrate 101, a display screen can be formed on both the first substrate and the second substrate. .

The image visually recognized on the display screen formed on the first substrate and the image visually recognized on the display screen formed on the second substrate are mirror images. Further, since the first substrate and the second substrate are light-transmitting substrates, the display screen is formed in a state where the scenery on the other side can be seen through the first substrate and the second substrate.

In addition, by providing polarizing plates on the first substrate and the second substrate, both the first substrate and the display screen formed on the first substrate and the display screen formed on the second substrate It is also possible to hide the scenery on the other side through the second substrate.

(Embodiment 2)
In the present embodiment, a case where the arrangement of (B) is used in the first configuration of the present invention will be described.
That is, the second so as to oppose the dots of the red organic light emitting element provided on the first substrate.
The white organic light emitting element dots are provided on the first substrate, and the white organic light emitting element dots are provided on the second substrate so as to face the green organic light emitting element dots provided on the first substrate. A case where white organic light emitting element dots are provided on the second substrate so as to face the blue organic light emitting element dots provided on the first substrate will be described.
In this embodiment, a case where a display screen is formed on the first substrate (display is performed on the first substrate side) will be described.

FIG. 18 shows a pixel structure of the display device of this embodiment mode. 18A shows a pixel configuration when viewed from the display screen side, that is, the observer side, FIG. 18B shows a pixel configuration on the first substrate, and FIG. 18C shows a second substrate. The pixel structure in is shown. 18 (B) and (C),
It is the top view seen from the surface side in which both the organic light emitting elements are formed.
The first substrate having the pixel configuration shown in FIG. 18B and the second substrate having the pixel configuration shown in FIG. 18C are overlapped so that the surfaces on which the organic light-emitting elements are formed face each other. Thus, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG.
In FIG. 18, wiring and the like are not shown in order to make it easy to understand how the light emitting regions overlap.

In FIG. 18B, 1200 is a red light emitting region formed by a red organic light emitting device, 1201 is a green light emitting region formed by a green organic light emitting device, and 1202 is blue light emitting formed by a blue organic light emitting device. It is an area.
In FIG. 18C, reference numerals 1203, 1204, and 1205 denote white light emitting regions formed by white organic light emitting elements, respectively.

In FIG. 18, the diagonally right hatched portion indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Also,
The diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate.
In the case of the present embodiment, the light emitting region formed on the first substrate and the light emitting region formed on the second substrate are approximately the same size and are formed so as to overlap at the same position. Therefore, the light shielding region of the first substrate and the light shielding region of the second substrate are also formed at substantially the same position.

A red light emitting area 1200, a green light emitting area 1201, a blue light emitting area 1202,
When all of the white light emitting areas 1203, 1204, and 1205 of the second substrate are made to emit light, it appears that three different color light emitting areas of the light emitting areas 1206, 1207, and 1208 are formed when viewed from the observer side. .
In this case, a red light emitting region brightened by white light emission is formed in 1206. In 1207, a green light emitting region brightened by white light emission is formed. 1208
A blue light emitting region that is brightened by white light emission is formed.

Note that in FIG. 18A, in 1206, 1207, and 1208, the light emitting region of the first substrate and the light emitting region of the second substrate overlap at the same position. Is shown in parentheses.
That is, “R” and “(W)” written in 1206 indicate that the red light emitting region of the first substrate and the white light emitting region of the second substrate overlap each other, and “G” "," (W
")" Indicates that the green light-emitting region of the first substrate and the white light-emitting region of the second substrate overlap, and 1208 indicates "B" and "(W)". This means that the blue light emitting region of the first substrate and the white light emitting region of the second substrate overlap.

Reference numeral 1206 denotes a red light emitting area when only the red light emitting area 1200 of the first substrate is turned on, and a white light emitting area when only the white light emitting area 1203 of the second substrate is turned on. Reference numeral 1207 denotes a green light emitting region when only the green light emitting region 1201 of the first substrate is turned on, and a white light emitting region when only the white light emitting region 1204 of the second substrate is turned on. Reference numeral 1208 denotes a blue light emitting region when only the blue light emitting region 1202 of the first substrate is turned on, and a white light emitting region when only the white light emitting region 1205 of the second substrate is turned on.

FIG. 19 is a cross-sectional view taken along the line AA ′ of FIG.
FIG. 19 is a schematic cross-sectional view for easy understanding of the cross-sectional structure of the display device of the present invention. The first substrate, the red, green, and blue organic light-emitting elements formed on the first substrate, the second Only the white organic light-emitting element formed on the substrate and the second substrate is shown.

In FIG. 19, a red (R) organic light emitting element 1311, a green (G) organic light emitting element 1312, and a blue (B) organic light emitting element 1313 are formed on the first substrate 1300. White organic light emitting elements 1323, 1324 and 1325 are formed on the substrate 1301. Then, as shown in FIG. 19, the red organic light emitting element 1311 formed on the first substrate and the white organic light emitting element 1323 formed on the second substrate are opposed to each other, and A blue organic light emitting element formed on the first substrate is formed such that the green organic light emitting element 1312 formed on the substrate and the white organic light emitting element 1324 formed on the second substrate face each other. The first substrate 1300 and the second substrate 1301 are overlapped so that 1313 and the white organic light emitting element 1325 formed on the second substrate face each other.

With such a structure, the second substrate 1301 is compared with the first substrate 1300.
Functions as a counter substrate, and the first substrate 1300 functions as a counter substrate with respect to the second substrate 1301, so that only the first substrate 1300 and the second substrate 1301 are sealed. Can be stopped. Therefore, the organic light emitting element is formed only on one substrate, and the thickness can be made almost the same as that of a normal display device sealed by the counter substrate.

The organic light emitting elements 1311, 1312, and 1313 formed on the first substrate 1300 include the direction of the surface of the first substrate 1300 on which the organic light emitting elements 1311, 1312, and 1313 are provided, and the first substrate 1300. It has a dual emission type structure that emits light in the direction of the surface opposite to the surface on which the organic light emitting elements 1311, 1312, and 1313 are provided. Further, the white organic light emitting element 1323 formed over the second substrate 1301.
, 1324 and 1325 are white organic light emitting elements 1323 and 1324 of the second substrate 1301.
, 1325 is a top emission type structure that emits light in the direction of the surface.
In FIG. 19, white arrows indicate the directions of light emission from the respective organic light emitting elements.

With such a configuration, white organic light emitting elements 1323, 1324, 1325 are formed.
, And light emitted from the red, green, and blue organic light emitting elements 1311, 1312, and 1313 in the direction of the surface opposite to the surface on which the organic light emitting elements 1311, 1312, and 1313 of the first substrate 1300 are formed. It can be taken out. That is, a display screen can be formed on the surface of the first substrate 1300 opposite to the surface on which the organic light emitting elements 1311, 1312, and 1313 are formed.

The red organic light emitting element 1311 includes a first electrode 1302, a second electrode 1304, and a layer 1303 containing an organic compound sandwiched between the first electrode 1302 and the second electrode 1304. The green organic light emitting element 1312 includes a first electrode 1305, a second electrode 1307,
The layer 1306 includes an organic compound sandwiched between the first electrode 1305 and the second electrode 1307. The blue organic light emitting element 1313 includes a first electrode 1308 and a second electrode 1.
310, a layer 130 containing an organic compound sandwiched between the first electrode 1308 and the second electrode 1310
9.

Then, the first electrode 1302 and the second electrode 1304 of the red organic light-emitting element 1311, the first electrode 1305 and the second electrode 1307 of the green organic light-emitting element 1312, and the first of the blue organic light-emitting element 1313. The electrode 1308 and the second electrode 1310 are formed using a transparent conductive film such as indium tin oxide (ITO) or IZO (indium zinc oxide) containing zinc oxide in indium oxide.
The material used for the transparent conductive film is not limited to these materials, and a metal thin film or the like can also be used.

Note that the first electrode 1302 of the red organic light-emitting element 1311 and the green organic light-emitting element 131 are used.
The second first electrode 1305 and the first electrode 1308 of the blue organic light emitting element 1313 are formed by patterning the same transparent conductive film. The red organic light emitting device 13
Eleventh second electrode 1304, second electrode 1307 of green organic light emitting element 1312, and second electrode 1310 of blue organic light emitting element 1313 are formed by patterning the same transparent conductive film.

Thus, by forming the first and second electrodes of each organic light emitting element with a transparent conductive film, a dual emission type organic light emitting element can be obtained.

The white organic light emitting element 1323 includes a first electrode 1314, a second electrode 1316, and a layer 1315 containing an organic compound sandwiched between the first electrode 1314 and the second electrode 1316. The white organic light emitting element 1324 includes a first electrode 1317 and a second electrode 13.
19, a layer 1318 containing an organic compound sandwiched between a first electrode 1317 and a second electrode 1319
It is constituted by. The white organic light emitting element 1325 includes a first electrode 1320, a second electrode 1322, and a layer 1321 containing an organic compound sandwiched between the first electrode 1320 and the second electrode 1322.

As the first electrode 1314 of the white organic light-emitting element 1323, the first electrode 1317 of the white organic light-emitting element 1324, and the first electrode 1320 of the white organic light-emitting element 1325, an electrode having a reflection function is used. preferable. White organic light emitting devices 1323, 1324, 132
5 first electrodes 1314, 1317, and 1320 have a reflection function, so that light is emitted from the red organic light emitting element 1311, the green organic light emitting element 1312, and the blue organic light emitting element 1313 toward the second substrate 1301. White light emitting elements 1323, 1324, 13
25 can be reflected by the first electrodes 1314, 1317, and 1320, so that the red organic light-emitting element 1311, the green organic light-emitting element 1312, and the blue organic light-emitting element 1313
Can be used efficiently.

The configuration described in this embodiment can individually adjust the white light emission luminance to be superimposed on each of red, green, and blue.
That is, the brightness of red, green, and blue can be individually adjusted in each pixel.
Therefore, for example, when viewed from the observer side, if the emission luminance of the white light emitting region formed at a position overlapping the red light emitting region is increased, that is, the white light provided opposite to the red organic light emitting element. If only the luminance of the organic light emitting element is increased, only red can be brightened and a pink display can be obtained.

In addition, the dot of the white organic light emitting element is provided on the second substrate so as to face the dot of the red organic light emitting element provided on the first substrate, and the green color provided on the first substrate is provided. White organic light emitting element dots are provided on the second substrate so as to face the organic light emitting element dots, and the first
Even when white organic light emitting element dots are provided on the second substrate so as to face the blue organic light emitting element dots provided on the other substrate, the red, green, and blue dots are provided to face each other. If all the white organic light-emitting elements thus made have the same light emission luminance, the brightness of the entire display screen can be adjusted, as in the case of the first embodiment.

In addition, since the display device of the present embodiment is arranged so that the white dots overlap the red dots, the green dots, and the blue dots, the red, green,
By setting the blue organic light-emitting element to the off state and turning on only the white organic light-emitting element, display can be performed even with only white.

In the display device of the present embodiment, when displaying only white, one white dot constitutes one pixel. Therefore, since the white dot overlaps with each of the red dot, green dot, and blue dot, when displaying only white, it is compared with performing color display. Thus, the number of pixels is tripled and a high-definition image can be displayed.

In addition, when displaying only white, the number of pixels is three times that of the first embodiment,
Since a high-definition image can be displayed, the configuration of this embodiment is more preferable than that of Embodiment 1.

In a display device that performs color display using normal red, green, and blue dots as one pixel, white display is performed by lighting the red, green, and blue dots when performing white display. On the other hand, in the case of the configuration of the present embodiment, the white organic light emitting element is formed on a substrate different from the substrate on which the red, green, and blue organic light emitting elements are formed. Since one pixel can be displayed with only the element in a lit state, power consumption can be reduced compared to the case where white display is performed by lighting red, green, and blue dots.

In addition, when the white organic light-emitting element is formed on the same substrate as the red, green, and blue organic light-emitting elements, the number of dots formed on one substrate increases. The number will decrease. However, in the configuration of the present embodiment, the white organic light emitting element is formed on a substrate different from the substrate on which the red, green, and blue organic light emitting elements are formed, so that the number of pixels is not reduced. In addition, when both color display and white display can be performed and only white display is performed, power consumption can be reduced.

In this embodiment, the first substrate is provided with red, green, and blue organic light-emitting elements, the second substrate is provided with white organic light-emitting elements, and a display screen is formed on the first substrate. However, the present invention is not limited to this.

The organic light emitting element provided on the first substrate may be replaced with the organic light emitting element provided on the second substrate. That is, a white light emitting element is provided on the first substrate, and red, green,
A blue organic light emitting element may be provided.

Alternatively, the display screen may be formed on both the first substrate and the second substrate.
In this case, the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate may be a dual emission type organic light emitting element. That is, the first electrode and the second electrode of the organic light-emitting element provided on the first substrate and the organic light-emitting element provided on the second substrate may be formed using a transparent conductive film.

(Embodiment 3)
In the present embodiment, in the first configuration of the present invention, a red organic light emitting element and a green organic light emitting element are provided on the first substrate, and a blue organic light emitting element and a white organic light emitting element are provided on the second substrate. A case where an element is provided will be described.

FIG. 27 shows a pixel structure of the display device of this embodiment mode. FIG. 27A shows the display screen side.
That is, FIG. 27B illustrates a pixel configuration on the first substrate, and FIG. 27C illustrates a pixel configuration on the second substrate as viewed from the observer side. FIGS. 27B and 27C are top views as seen from the side on which the organic light emitting element is formed.
The first substrate having the pixel configuration shown in FIG. 27B and the second substrate having the pixel configuration shown in FIG. 27C are overlapped so that the surfaces on which the organic light emitting elements are formed face each other. Thus, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG.
In FIG. 27, wiring and the like are not shown in order to make it easy to understand how the light emitting regions overlap.

In FIG. 27B, 3000 is a green light emitting region formed by a green organic light emitting element, and 3001 is a red light emitting region formed by a red organic light emitting element.
In FIG. 27C, reference numeral 3002 denotes a blue light emitting region formed by a blue organic light emitting element, and 3003 denotes a white light emitting region formed by a white organic light emitting element.

In FIG. 27, the obliquely hatched portion to the right indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate.
In the case of the present embodiment, the light emitting region formed on the first substrate and the light emitting region formed on the second substrate are approximately the same size and are formed so as to overlap at the same position. Therefore, the light shielding region of the first substrate and the light shielding region of the second substrate are also formed at substantially the same position.

When all of the green light emitting region 3000, the red light emitting region 3001, and the blue light emitting region 3002 and the white light emitting region 3003 of the second substrate emit light, the light emitting regions 3004 and 3005 are two when viewed from the observer side. It appears that light emitting areas of two different colors are formed.
In this case, a light emitting region of a mixed color of blue and green is formed in 3004. In 3005, a red light emitting region brightened by white light emission is formed.

Note that in FIG. 27A, in 3004 and 3005, the light emitting region of the first substrate and the light emitting region of the second substrate overlap at the same position. Shown in writing.
That is, “G” and “(B)” described in 3004 indicate that the green light emitting region of the first substrate and the blue light emitting region of the second substrate overlap, “R”, “
“(W)” indicates that the red light-emitting region of the first substrate overlaps the white light-emitting region of the second substrate.

Therefore, 3004 is a green light emitting region when only the green light emitting region 3000 of the first substrate is turned on, and 3004 is a blue light emitting region when only the blue light emitting region 3002 of the second substrate is turned on. Become. Reference numeral 3005 denotes a red light emitting region when only the red light emitting region 3001 of the first substrate is turned on, and a white light emitting region when only the white light emitting region 3003 of the second substrate is turned on.

FIG. 28 is a cross-sectional view of the pixel configuration shown in FIG. FIG. 28A shows an A- in FIG.
FIG. 28B is a cross-sectional view taken along the line BB ′ of FIG. 27A.
FIG. 28 shows an organic light emitting element provided on a first substrate and a second one in a display device of the present invention.
It is sectional drawing for showing clearly about the positional relationship of the organic light emitting element provided in this board | substrate. Accordingly, only the first substrate, the green and red organic light emitting elements formed on the first substrate, the second substrate, and the blue and white organic light emitting elements formed on the second substrate are shown. .

In FIG. 28A, a green (G) organic light-emitting element 408 is formed over the first substrate 400.
A red (R) organic light emitting element 409 is formed, and a blue organic light emitting element 416 and a white organic light emitting element 417 are formed on the second substrate 401. And FIG. 28 (A)
As shown, the green organic light emitting device 408 formed on the first substrate 400 is opposed to the blue organic light emitting device 416 formed on the second substrate, and is formed on the first substrate. A white organic light emitting device 417 in which the formed red organic light emitting device 409 is formed on the second substrate.
The first substrate 400 and the second substrate 401 are provided so as to face each other.

With such a structure, the second substrate 401 functions as a counter substrate with respect to the first substrate 400, and the first substrate 400 functions as a counter substrate with respect to the second substrate 401. Therefore, sealing can be performed using only two substrates, the first substrate 400 and the second substrate 401. Therefore, the organic light emitting element is formed only on one substrate, and the thickness can be made almost the same as that of a normal display device sealed by the counter substrate.

The organic light emitting elements 408 and 409 formed on the first substrate 400 are the direction of the surface where the organic light emitting elements 408 and 409 of the first substrate 400 are provided, and the organic light emitting element 408 of the first substrate 400. , 409, the direction of the surface opposite to the surface on which the second substrate 40 is provided.
It has a dual emission type structure that emits light in one direction. Also,
The organic light emitting elements 416 and 417 formed on the second substrate 401 are connected to the second substrate 310.
It has a top emission type (top emission type) structure that emits light in the direction of the surface on which the one organic light emitting element 416, 417 is provided, that is, in the direction of the first substrate.
In FIG. 28, white arrows indicate the directions of light emission from the respective organic light emitting elements.

The green organic light emitting element 408 includes a first electrode 402, a second electrode 404, and a first electrode 40.
2 and a layer 403 containing an organic compound sandwiched between the second electrode 402 and the second electrode 402. The red organic light-emitting element 409 includes a first electrode 405, a second electrode 407, and a layer 406 containing an organic compound sandwiched between the first electrode 405 and the second electrode 407. The blue organic light emitting element 416 includes a first electrode 410, a second electrode 412, a first electrode 410, and a second electrode.
The layer 411 includes an organic compound sandwiched between the electrodes 412.
The white organic light emitting element 417 includes a first electrode 413, a second electrode 415, and a first electrode 413.
And a layer 414 containing an organic compound sandwiched between the second electrodes 415.

Then, the first electrode 402 and the second electrode 404 of the green organic light emitting element 408, the first electrode 405 of the red organic light emitting element 409, the second electrode 407, and the second of the blue organic light emitting element 416. The electrode 412 and the second electrode 415 of the white organic light-emitting element 417 are each made of a transparent conductive film such as indium tin oxide (ITO) or IZO (Indium Zinc Oxide) containing zinc oxide in indium oxide. Use.
Note that the first electrode 402 of the green organic light emitting element 408 and the first electrode 405 of the red organic light emitting element 409 are formed by patterning the same transparent conductive film. Further, the second electrode 404 of the green organic light emitting element 408 and the second electrode 407 of the red organic light emitting element 409 are formed by patterning the same transparent conductive film. Further, the second electrode 412 of the blue organic light-emitting element 416 and the second electrode 4 of the white organic light-emitting element 417 are used.
15 is formed by patterning the same transparent conductive film.

Thus, by forming the first and second electrodes of each organic light emitting element provided on the first substrate 400 with a transparent conductive film, a dual emission type organic light emitting element can be obtained.

As the first electrode 410 of the blue organic light-emitting element 416 and the first electrode 413 of the white organic light-emitting element 417, an electrode having a reflective function is preferably used. Since the first electrode has a reflection function, the light emitted from the green organic light emitting element 408 and the red organic light emitting element 409 toward the second substrate 401 is converted into the blue organic light emitting element 416 and the white organic light emitting element. Element 4
Therefore, light emitted from the green organic light emitting element 408 and the red organic light emitting element 409 can be used efficiently.

27 and 28, the case where the areas of the light emitting regions of the organic light emitting elements are all the same has been described. However, the area of the light emitting regions of the organic light emitting elements may be different depending on the color.

FIG. 6 shows a pixel configuration of the display device in the case where the area of the light emitting region of the organic light emitting element is different depending on the color. 6A shows a pixel configuration when viewed from the display screen side, that is, the observer side, FIG. 6B shows a pixel configuration on the first substrate, and FIG. 6C shows a second substrate. The pixel structure in is shown.
The first substrate having the pixel configuration shown in FIG. 6B and the second substrate having the pixel configuration shown in FIG. 6C are overlapped so that the surfaces on which the organic light-emitting elements are formed face each other. Thus, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG. FIGS. 6B and 6C are top views as seen from the side on which the organic light emitting element is formed.

6B, reference numeral 300 denotes a green light emitting region formed by a green organic light emitting element,
Reference numeral 301 denotes a red light emitting region formed by a red organic light emitting element.
In FIG. 6C, 302 is a blue light emitting region formed by a blue organic light emitting element,
Reference numeral 303 denotes a white light emitting region formed by a white organic light emitting element.
In FIG. 6, wiring and the like are not shown for easy understanding of how the light emitting regions overlap.

The difference between the configuration shown in FIG. 6 and the configuration shown in FIG. 27 is that the areas of the light emitting regions of the red organic light emitting device and the blue organic light emitting device are different from the areas of the light emitting regions of the green organic light emitting device and the white organic light emitting device. Is also a large point. In the example shown in FIG. 6, the red and blue organic light-emitting elements have red light emitting areas formed larger in area than the light emitting areas of the green and white organic light emitting elements. A part of the light emitting region 301 of the organic light emitting element overlaps with a part of the light emitting region 302 of the blue organic light emitting element when viewed from the observer side.

In FIG. 6, the obliquely hatched portion on the right side indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate. Therefore, when the first substrate and the second substrate are overlapped and viewed from the first substrate side (observer side), in the regions other than the green light emitting region 300 and the red light emitting region 301 of the first substrate, The light emitted from the organic light emitting element formed on the second substrate is shielded from light. Therefore, when viewed from the observer side, the blue light emitting region 302 of the second substrate.
A part of the light is shielded by the light shielding region of the first substrate.

Green light emitting region 300, red light emitting region 301 on the first substrate, blue light emitting region 3 on the second substrate
02, when all of the white light emitting area 303 emits light, the light emitting area 304 is seen from the observer side.
, 305, 306, and 307, it appears that four different color light emitting regions are formed.
In this case, a light emitting region of a mixed color of blue and green is formed in 304. In 305, a light emitting region of a mixed color of red and blue is formed. In 306, a red light emitting region is formed. In 307, a light emitting region of a mixed color of red and white is formed.

Note that in 304, 305, 306, and 307 in FIG. 6A, the color of the light-emitting region of the second substrate is shown in parentheses.
That is, “G” and “(B)” in 304 indicate that the green light emitting region of the first substrate and the blue light emitting region of the second substrate overlap, “R”, “(B
) "Indicates that the red light emitting region of the first substrate and the blue light emitting region of the second substrate overlap, and" R "is described in 306 as This indicates that the region is formed only by the light emitting region of the first substrate, and “R” and “(W)” are described in 307 as the red light emitting region of the first substrate and the second substrate. It shows that the white light emitting region of the substrate overlaps.

Therefore, when only the green light emitting region 300 of the first substrate is turned on, 304 becomes a green light emitting region, and when only the red light emitting region 301 of the first substrate is turned on, 3
05, 306, and 307 are red light emitting regions. When only the blue light emitting area 302 of the second substrate is turned on, 304 and 305 are blue light emitting areas. When only the white light emitting area 303 of the second substrate is turned on, 307 emits white light. It becomes an area.

7 and 8 are cross-sectional views of the pixel configuration shown in FIG. FIG. 7A shows the AA of FIG.
7B is a cross-sectional view taken along the line BB ′ of FIG. 6A, FIG. 8A is a cross-sectional view taken along the line CC ′ of FIG. 6A, and FIG. FIG. 6B is a cross-sectional view taken along the line DD ′ of FIG. 7 and 8 are cross-sectional schematic views for easy understanding of the cross-sectional structure of the display device of the present invention. The first substrate, the green and red organic light-emitting elements formed on the first substrate, the first Only the blue and white organic light-emitting elements formed on the second substrate and the second substrate are shown. 7 and 8, the same reference numerals as those in FIG.

In FIG. 7A, a green (G) organic light-emitting element 408 and a red (R) organic light-emitting element 409 are formed over the first substrate 400, and the second substrate 401 has A blue organic light emitting element 416 and a white organic light emitting element 417 are formed. Then, as shown in FIG. 7A, a green organic light emitting element 408 formed on the first substrate 400 is part of the blue organic light emitting element 416 formed on the second substrate. Opposite blue organic light emitting device 416 formed on the second substrate and red organic light emitting device 409 formed on the first substrate.
The first substrate 400 and the second substrate 401 are provided so as to face each other and the white organic light emitting element 417 formed on the second substrate.
In FIG. 7, white arrows indicate the directions of light emission from the respective organic light emitting elements.

Since red and blue have lower visibility than green, the red and blue organic light-emitting elements have red areas by making the area of the light-emitting areas larger than the area of the green organic light-emitting elements. The green and blue colors can be balanced, and the brightness of the display screen can be adjusted by providing the white organic light emitting element.
In addition, since the organic light emitting elements provided on the first substrate and the second substrate have two colors, respectively, the number of pixels provided on the substrate is the same, and three colors of organic light emitting elements are provided on the substrate. In comparison, since the number of elements for driving the organic light emitting elements provided in each dot can be reduced, the aperture ratio can be improved.

A cross-sectional structure taken along BB ′, CC ′, and DD ′ in FIG.
Referring to FIG. 7B, in BB ′ of FIG. 6A, the green organic light emitting element 408 formed on the first substrate 400 and the blue organic light emitting element 408 formed on the second substrate. Organic light emitting device 41
It can be seen that 6 is provided so as to oppose.

Referring to FIG. 8A, in CC ′ of FIG. 6A, the red organic light emitting element 409 formed on the first substrate 400 and the blue organic light emitting element 409 formed on the second substrate. Organic light emitting device 41
It can be seen that 6 is provided so as to oppose.

Referring to FIG. 8B, in DD ′ of FIG. 6A, the red organic light emitting element 409 formed on the first substrate 400 and the white organic light emitting element 409 formed on the second substrate. Organic light emitting device 41
7 is provided so as to be opposed to 7.

In this embodiment, a red organic light emitting element and a green organic light emitting element are provided on the first substrate,
Although the case where the blue organic light emitting element and the white organic light emitting element are provided on the second substrate has been described, the present invention is not limited to this configuration.
Since it is only necessary to balance red, green, and blue, the area of the light emitting region of the red organic light emitting device and the blue organic light emitting device, which has low visibility compared with green, is the same as that of the light emitting region of the green organic light emitting device. What is necessary is just to be able to make it larger than an area. Therefore, the organic light emitting element provided on the same substrate as green may be either a red or blue organic light emitting element. Therefore, the green organic light emitting element and the white organic light emitting element may be interchanged. That is, a red organic light emitting element and a white organic light emitting element are provided on a first substrate, a blue organic light emitting element is provided on a second substrate,
A green organic light emitting element may be provided.

6-8, the green organic light emitting element 408 formed on the first substrate 400 faces a part of the blue organic light emitting element 416 formed on the second substrate, First
The red organic light emitting device 409 formed on the substrate is part of the blue organic light emitting device 416 formed on the second substrate, and the white organic light emitting device is formed on the second substrate. 41
Although each organic light emitting element is arrange | positioned so that 7 may be opposed, it is not limited to this arrangement | positioning.
For example, a green organic light emitting element and a white organic light emitting element may be opposed to each other, and a red organic light emitting element and a blue organic light emitting element may be opposed to each other.
Further, for example, the organic light emitting element provided on the second substrate can be formed in a direction rotated by ± 90 degrees.

Examples of the case where the organic light emitting element provided on the second substrate is rotated by +90 degrees are shown in FIGS.
1 will be used for explanation.
FIG. 9 shows a pixel configuration when the organic light emitting element provided on the second substrate is rotated by +90 degrees.
FIG. 9A shows a pixel configuration when viewed from the display screen side, that is, the observer side, and FIG.
FIG. 9C shows a pixel configuration on the first substrate, and FIG. 9C shows a pixel configuration on the second substrate.
A first substrate having the pixel configuration shown in FIG. 9B and a second substrate having the pixel configuration shown in FIG. 9C are overlapped so that the surfaces on which the organic light-emitting elements are formed face each other. Thus, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG. FIGS. 9B and 9C are top views as seen from the surface side on which the organic light emitting element is formed.

In FIG. 9B, 500 is a green light emitting region formed by a green organic light emitting element,
Reference numeral 501 denotes a red light emitting region formed by a red organic light emitting element.

In FIG. 9C, reference numeral 502 denotes a blue light emitting region formed by a blue organic light emitting element, and reference numeral 503 denotes a white light emitting region formed by a white organic light emitting element.
In FIG. 9, wirings and the like are not shown for easy understanding of how the light emitting regions overlap.

In FIG. 9, the obliquely hatched portion to the right indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate. Therefore, when the first substrate and the second substrate are overlapped and viewed from the first substrate side (observer side), in the region other than the green light emitting region 500 and the red light emitting region 501 of the first substrate. The light emitted from the organic light emitting element formed on the second substrate is shielded from light. Therefore, when viewed from the observer side, the blue light emitting region 502 of the second substrate.
And a part of the white light emitting region 503 are shielded from light by the light shielding region of the first substrate.

First substrate green light emitting region 500, red light emitting region 501, second substrate blue light emitting region 5
02, when all of the white light emitting region 503 emits light, the light emitting region 504 is viewed from the observer side.
, 505, 506, 507, 508, and 509, it seems that light emitting regions of six different colors are formed.
In this case, a light emitting region of a mixed color of green and blue is formed at 504. In 505, a green light emitting region is formed. In 506, a light emitting region of a mixed color of green and white is formed. In 507, a light emitting region of a mixed color of red and blue is formed. In 508, a red light emitting region is formed. 5
In 09, a light emitting region of a mixed color of red and white is formed.

Note that in 504, 506, 507, and 509 in FIG. 9A, the color of the light-emitting region of the second substrate is shown in parentheses.
That is, “G” and “(B)” described in 504 indicate that the green light-emitting region of the first substrate and the blue light-emitting region of the second substrate are overlapped. “G” indicates that the region is formed only by the green light emitting region of the first substrate, and “G” and “(W)” are described in 506. The green light emitting area of the first substrate and the white light emitting area of the second substrate are overlapped, and “R” and “(B)” are described in 507. The red light emitting region of the second substrate and the blue light emitting region of the second substrate overlap each other, and “R” is described in 508 as a region formed only by the red light emitting region of the first substrate. 309, “R” and “(W)” are described in 309 because the red emission region of the first substrate Indicates that overlap the white light-emitting region of the second substrate.

Therefore, when only the green light emitting region 500 of the first substrate is turned on, 504, 5
05 and 506 are green light emitting areas. When only the red light emitting area 501 of the first substrate is turned on, 507, 508, and 509 are red light emitting areas. When only the blue light emitting region 502 of the second substrate is turned on, 504 and 507 are blue light emitting regions. When only the white light emitting region 503 of the first substrate is turned on, 506 and 509 are It becomes a white light emitting region.

FIG. 10 is a cross-sectional view of the pixel configuration shown in FIG. FIG. 10A shows an AA ′ line in FIG.
FIG. 10B is a cross-sectional view taken along the line BB ′ of FIG. 9A, and FIG.
FIG. 11A is a cross-sectional view taken along the line CC ′ of FIG. 9A, and FIG. 11B is a cross-sectional view taken along the line DD ′ of FIG. 10 and 11 are cross-sectional views for clearly showing the positional relationship between the organic light-emitting element provided on the first substrate and the organic light-emitting element provided on the second substrate in the display device of the present invention. It is. Therefore, only the first substrate, the organic light emitting device formed on the first substrate, the second substrate, and the organic light emitting device formed on the second substrate are shown.

10A, a green (G) organic light-emitting element 608 is formed over the first substrate 600.
A red (R) organic light emitting element 609 is formed, and a blue organic light emitting element 613 is formed on the second substrate 601. Then, as shown in FIG. 10A, the second substrate 6
The first substrate 600 is arranged such that the blue organic light emitting device 613 formed on 01 faces the green organic light emitting device 408 and the red organic light emitting device 409 formed on the first substrate.
And the second substrate 601 are provided so as to overlap each other.

The organic light emitting elements 608 and 609 formed on the first substrate 600 are the direction of the surface of the first substrate 600 where the organic light emitting elements 608 and 609 are provided, and the organic light emitting element 608 of the first substrate 600. , 609, the direction of the surface opposite to the surface on which the second substrate 60 is provided.
It has a dual emission type structure that emits light in one direction. Also,
The organic light-emitting element 613 formed on the second substrate 601 is an upward emission type that emits light in the direction of the surface of the second substrate 601 where the organic light-emitting element 613 is provided, that is, in the direction of the first substrate. Top emission type).
10 and 11, white arrows indicate the directions of light emission from the respective organic light emitting elements.

The green organic light emitting element 608 includes a first electrode 602, a second electrode 604, and a first electrode 60.
2 and a layer 603 containing an organic compound sandwiched between the second electrode 602 and the second electrode 602. The red organic light-emitting element 609 includes a first electrode 605, a second electrode 607, and a layer 606 containing an organic compound sandwiched between the first electrode 605 and the second electrode 607. The blue organic light-emitting element 616 includes a first electrode 610, a second electrode 612, a first electrode 610, and a second electrode.
The layer 611 containing an organic compound is sandwiched between the electrodes 612.
The white organic light-emitting element 617 includes a first electrode 613, a second electrode 615, and a first electrode 613.
And a layer 614 containing an organic compound sandwiched between the second electrodes 615.

In addition, about the material which comprises the 1st electrode of each organic light emitting element, a 2nd electrode, and the layer containing an organic compound, the material same as the material demonstrated in the pixel structure shown to FIGS. That's fine.

Further, the configuration is not limited to the configuration illustrated in FIG. 9, and a configuration in which the positions of the blue light emitting region 502 and the white light emitting region 503 in FIG.

The pixel configuration examples shown in FIGS. 9 to 11 are the pixel configuration examples shown in FIGS. 6 to 8 and the organic light emitting region formed on the second substrate and the organic light emitting region formed on the first substrate. Since the light emitting regions overlap by the light emitting elements, the color mixing method, that is, the displayed color is different.

Organic light emission formed on the first substrate by changing the arrangement of the light emitting region formed by the organic light emitting element formed on the first substrate and the light emitting region formed by the organic light emitting element formed on the second substrate Since the color overlap of the light emitting region by the element and the light emitting region by the organic light emitting element formed on the second substrate changes, the color of the image to be displayed can be changed.
Therefore, if the arrangement of the light emitting region by the organic light emitting element formed on the first substrate and the light emitting region by the organic light emitting element formed on the second substrate is changed according to the image quality required for each image. , It is possible to make the color suitable for each image.

(Embodiment 4)
In the present embodiment, an example of the second configuration of the present invention will be described. That is, a first substrate on which red (R), green (G), and blue (B) organic light emitting elements are formed, and red (R)
), Cyan (C), which is a complementary color of green (G), magenta (M) which is a complementary color of green (G), and a second substrate on which an organic light emitting element of yellow (Y) which is a complementary color of blue (B) is formed. In addition, a display device in which a display screen is formed on a first substrate will be described.

In the display device of this embodiment, instead of the white organic light-emitting element of Embodiment 1, organic light emission of cyan, which is a complementary color of red, magenta which is a complementary color of green, and yellow which is a complementary color of blue is applied to the second substrate. An element is formed.

FIG. 12 is a diagram illustrating an example of a pixel configuration of the display device of this example.
FIG. 12A shows a pixel structure when viewed from the display screen side (from the observer side) when a display screen is formed only on the first substrate, and FIG. 12B shows a pixel on the first substrate. Configuration, FIG. 12C illustrates a pixel configuration on the second substrate.
The first substrate having the pixel configuration shown in FIG. 12B and the second substrate having the pixel configuration shown in FIG. 12C are overlapped so that the surfaces on which the organic light-emitting elements are formed face each other. Thus, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG. FIGS. 12B and 12C are top views as seen from the surface side on which the organic light emitting element is formed.

In FIG. 12B, 700 is a red light emitting region formed by a red (R) organic light emitting device, 701 is a green light emitting region formed by a green (G) organic light emitting device, and 702 is blue (B). 3 shows a blue light emitting region formed by an organic light emitting element.

In FIG. 12C, reference numeral 703 denotes a yellow light emitting region formed by a yellow (Y) organic light emitting element, reference numeral 704 denotes a magenta light emitting region formed by a magenta (M) organic light emitting element, and reference numeral 705 denotes cyan (C). It is a cyan light emitting region formed by an organic light emitting element.
In FIG. 12, wirings and the like are not shown for easy understanding of how the light emitting regions overlap.

As shown in FIG. 12A, when the first substrate and the second substrate are overlapped, a red light emitting region 700, a green light emitting region 701, a blue light emitting region 702, a yellow light emitting region 703, and a magenta light emitting region. 704 and the cyan light emitting region 705 are arranged so as to be substantially orthogonal to each other. That is, the red light emitting area 700 is a yellow light emitting area 703 and a magenta light emitting area 704.
, The cyan light emitting area 705 and the green light emitting area 701 overlap each other.
3 and the magenta light emitting region 704 and the cyan light emitting region 705, respectively, and the blue light emitting region 7
02 overlaps with the yellow light emitting area 703, the magenta light emitting area 704, and the cyan light emitting area 705, respectively.

In FIG. 12, the diagonally right hatched portion indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate. Therefore, when the first substrate and the second substrate are overlapped and viewed from the first substrate side (observer side), the red light emitting region 700 of the first substrate,
In regions other than the green light emitting region 701 and the blue light emitting region 702, light emission from the organic light emitting element formed on the second substrate is shielded. Therefore, when viewed from the observer side, a part of the yellow light emitting region 703, a part of the magenta light emitting region 704, and the cyan light emitting region 7 of the second substrate.
Part of 05 is shielded from light by the light shielding region of the first substrate.

When all of the red light emitting area 700, the green light emitting area 701, the blue light emitting area 702 of the first substrate, the yellow light emitting area 703, the magenta light emitting area 704, and the cyan light emitting area 705 of the second substrate are all emitted, As seen, the light emitting areas 706, 707, 708, 709, 71
0, 711, 712, 713, 714, 715, 716, 717, 718, 719, 72
It appears that 15 different colored light emitting regions of 0 are formed.
In this case, a light emitting region of a mixed color of red and yellow is formed at 706. In 707, a red light emitting region is formed. In 708, red and magenta light emitting regions are formed. 709
A red light-emitting region is formed in. In 710, a light emitting region of a mixed color of red and cyan is formed. In 711, a light emitting region of a mixed color of green and yellow is formed. In 712, a green light emitting region is formed. In 713, a light emitting region of mixed colors of green and magenta is formed. In 714, a green light emitting region is formed. In 715, a light emitting region of a mixed color of green and cyan is formed.
In 716, a light emitting region of a mixed color of blue and yellow is formed. In 717, a blue light emitting region is formed. In 718, a light emitting region of a mixed color of blue and magenta is formed. A blue light emitting region is formed at 719. In 720, a light emitting region of a mixed color of blue and cyan is formed.

In addition, 706, 708, 710, 711, 713, 715, 716, 7 in FIG.
18 and 720, the color of the light emitting region of the second substrate is shown in parentheses.
That is, “R” and “(Y)” described in 706 indicate that the red light-emitting region of the first substrate and the yellow light-emitting region of the second substrate are overlapped. “R” indicates that the region is formed only by the red light emitting region of the first substrate, and “R” and “(M)” are described in 708. The red light emitting region of the first substrate and the magenta light emitting region of the second substrate are overlapped, and “R” is written in 709 only by the red light emitting region of the first substrate. This indicates that the region is formed, and “R” and “(C)” are described in 710 as the red light emitting region of the first substrate and the second region.
This shows that the cyan light emitting regions of the substrate overlap. “G” and “(Y)” described in 711 indicate that the green light emitting region of the first substrate and the yellow light emitting region of the second substrate overlap, and “G” ”Indicates that the region is formed only by the green light emitting region of the first substrate, and“ G ”and“ (M) ”are described in 713. This indicates that the green light emitting area of the second substrate and the magenta light emitting area of the second substrate overlap each other, and “G” in 714 is formed only by the green light emitting area of the first substrate. 715 and “G” and “(C)” indicate that the green emission region of the first substrate and the cyan emission region of the second substrate overlap. Show. “B” and “(Y)” in 716 indicate that the blue light-emitting region of the first substrate and the yellow light-emitting region of the second substrate overlap, and “B” in 717 ”Indicates that the region is formed only by the blue light emitting region of the first substrate, and“ B ”and“ (M) ”are described in 718. The blue light-emitting region of the first substrate and the magenta light-emitting region of the second substrate are overlapped, and “B” in 719 is formed only by the blue light-emitting region of the first substrate. 7
“B” and “(C)” in 20 indicate that the blue light emitting region of the first substrate and the cyan light emitting region of the second substrate overlap.

Therefore, when only the red light emitting region 700 of the first substrate is turned on, 706, 7
Reference numerals 07, 708, 709, and 710 denote red light emitting regions, and the green light emitting region 701 of the first substrate.
711, 712, 713, 714, 715 are green light emitting areas when only the light emitting state is turned on, and 716, 7 are set when only the blue light emitting area 702 of the first substrate is turned on.
17, 718, 719, and 720 are blue light emitting regions. Yellow light emitting area 7 of the second substrate
When only 03 is turned on, 706, 711, and 716 are yellow light emitting areas, and when only the magenta light emitting area 704 of the second substrate is turned on, 708, 713
, 718 are magenta light emitting areas, and only the cyan light emitting area 705 of the second substrate is turned on, 710, 715, and 720 are cyan light emitting areas.

FIG. 13 is a cross-sectional view of the pixel configuration shown in FIG. FIG. 13A shows the A- of FIG.
FIG. 13B is a cross-sectional view taken along the line BB ′ of FIG. 12A.
FIG. 13 is a schematic cross-sectional view for easy understanding of the cross-sectional structure of the display device of the present invention. The first substrate, the red, green, and blue organic light-emitting elements formed on the first substrate, the second Only the yellow, magenta and cyan organic light emitting elements formed on this substrate and the second substrate are shown.

In FIG. 13A, a red organic light-emitting element 811, a green organic light-emitting element 812, and a blue organic light-emitting element 813 are formed over the first substrate 800, and the second substrate 801 is formed over the first substrate 800. A magenta organic light emitting device 828 is formed. The magenta organic light emitting device 828 is opposed to the red organic light emitting device 811, the green organic light emitting device 812, and the blue organic light emitting device 813.

In FIG. 13B, a red organic light emitting element 811 is formed over a first substrate 800, and a yellow organic light emitting element 827 and a magenta organic light emitting element 828 are formed over a second substrate 801. A cyan organic light emitting element 829 is formed.

The red organic light emitting element 811 includes a first electrode 802, a second electrode 804, and a first electrode 80.
2 and a layer 803 containing an organic compound sandwiched between the second electrode 804 and the second electrode 804. The green organic light-emitting element 812 includes a first electrode 805, a second electrode 807, and a layer 806 containing an organic compound sandwiched between the first electrode 805 and the second electrode 807. The blue organic light-emitting element 813 includes a first electrode 808, a second electrode 810, a first electrode 808, and a second electrode.
The layer 809 containing an organic compound is sandwiched between the electrodes 810.

The yellow organic light emitting element 827 includes a first electrode 818, a second electrode 820, and a layer 819 containing an organic compound sandwiched between the first electrode 818 and the second electrode 820. A magenta organic light-emitting element 828 includes a first electrode 821, a second electrode 823, and a layer 822 containing an organic compound sandwiched between the first electrode 821 and the second electrode 823. The cyan organic light emitting element 829 includes a first electrode 824, a second electrode 826, and a first electrode 8.
24 and a layer 825 containing an organic compound sandwiched between the second electrode 826 and the second electrode 826.

In FIG. 13, white arrows indicate the directions of light emission from the respective organic light emitting elements. In FIG. 13, an image is displayed on the first substrate. That is, the display screen is formed only on the first substrate. Therefore, the organic light emitting elements 811 and 8 formed on the first substrate.
Reference numerals 12 and 813 denote a dual emission type structure, an organic light emitting element 827 formed on the second substrate,
Reference numerals 828 and 829 each have a top emission type structure.
Therefore, the first electrode and the second electrode of the organic light emitting element formed on the first substrate are formed of a transparent conductive film, and the second electrode of the organic light emitting element formed on the second substrate is And a transparent conductive film. Note that the first electrode of the organic light emitting element provided on the second substrate has the light emitted from the organic light emitting element formed on the first substrate in the direction of the second substrate in the direction of the first substrate. In order to reflect, it is preferable to form with a reflective electrode.

Note that the material described in Embodiment 1 may be used as a material for forming the reflective electrode and the transparent conductive film.

With such a configuration, in addition to red, green, and blue, colors of yellow, magenta, and cyan can be displayed in an overlapping manner. Therefore, it is possible to express a color that cannot be expressed by only three colors of red, green, and blue.

Note that the pixel configuration shown in FIGS. 12 and 13 is an example, and the present invention is not limited to this configuration. In the present embodiment, an example in which organic light emitting elements of three colors of cyan, magenta, and yellow are formed is shown, but the number of colors of the organic light emitting elements to be formed is not limited to the case of three colors. Only one or two of the three colors of cyan, magenta, and yellow may be formed.
Further, the color type of the organic light emitting element to be formed is not limited to only cyan, magenta, and yellow which are complementary colors of red, green, and blue. Colors other than cyan, magenta, and yellow may be used as long as they are colors other than red, green, and blue and can increase the range of colors that can be displayed. Therefore, any color can be used as long as it is an organic light-emitting element that emits light of a color having a chromaticity coordinate outside the range of a triangle having the chromaticity coordinate of red, the chromaticity coordinate of green, and the chromaticity coordinate of blue as a vertex. There may be.

Further, the arrangement of yellow, magenta and cyan is not particularly limited to the arrangement shown in FIG. In FIG. 12, the light emitting region of the organic light emitting element provided on the first substrate and the light emitting region of the organic light emitting element formed on the second substrate are overlapped so as to be substantially orthogonal to each other. However, the method is not limited to such a stacking method, and the light emitting region of the organic light emitting element formed on the first substrate and the light emitting region formed on the second substrate are provided in a parallel direction, and the first One color of the organic light emitting element provided on the second substrate and one color of the organic light emitting element provided on the second substrate may overlap each other. However, when the light emitting region of the organic light emitting device provided on the first substrate and the light emitting region of the organic light emitting device provided on the second substrate are arranged as shown in FIG. 12, they are provided on the first substrate. Since the three-color organic light-emitting elements provided on the second substrate are uniformly overlapped with the one-color organic light-emitting elements, display can be performed with a uniform color.

In this embodiment, red, green, and blue organic light emitting elements are provided on the first substrate, yellow, magenta, and cyan organic light emitting elements are provided on the second substrate, and the display screen is provided on the first substrate. However, the present invention is not limited to this.

The organic light emitting element provided on the first substrate may be replaced with the organic light emitting element provided on the second substrate. In other words, the first substrate may be provided with yellow, magenta, and cyan organic light-emitting elements, and the second substrate may be provided with red, green, and blue organic light-emitting elements.

Alternatively, the display screen may be formed on both the first substrate and the second substrate.
In this case, the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate may be a dual emission type organic light emitting element. That is, the first electrode and the second electrode of the organic light-emitting element provided on the first substrate and the organic light-emitting element provided on the second substrate may be formed using a transparent conductive film.

(Embodiment 5)
In the present embodiment, an example of the second configuration of the present invention will be described. That is, the red organic light emitting element is formed on the first substrate, the blue organic light emitting element is formed on the second substrate, and the green organic light emitting element is one of the first substrate and the second substrate. The organic light emitting element of one color selected from the red complementary color, the green complementary color, and the blue complementary color is formed on the first substrate or the second substrate.
The display device is formed on the other substrate, and the area of the light emitting region of the red organic light emitting element and the blue organic light emitting element is larger than the area of the light emitting region of the green organic light emitting element. To do.

In Embodiment 3, the first substrate is provided with a red organic light emitting element and one of the green organic light emitting element or the white organic light emitting element, and the second substrate has A blue organic light emitting element and a green organic light emitting element or the other organic light emitting element of the white organic light emitting element are provided, and the area of the light emitting region of the red organic light emitting element and the blue organic light emitting element is green organic A display device that is larger than the area of the light emitting region of the light emitting element has been described. In the third embodiment, if a single color organic light emitting element selected from a red complementary color, a green complementary color, and a blue complementary color is provided instead of the white organic light emitting element, the fourth configuration of the present invention will be described. Can be implemented.

According to the configuration of this embodiment, red and blue have lower visibility than green, so the area of the light emitting region of the red organic light emitting element and that of the blue organic light emitting element is the area of the light emitting region of the green organic light emitting element. By making it larger than this, it is possible to balance red, green and blue. Furthermore, by providing an organic light emitting element of one color selected from a complementary color of red, a complementary color of green, and a complementary color of blue, colors that cannot be expressed only by red, green, and blue can be expressed. The range of colors that can be reproduced can be expanded.
In addition, since the organic light emitting elements provided on the first substrate and the second substrate have two colors, respectively, the number of pixels provided on the substrate is the same, and three colors of organic light emitting elements are provided on the substrate. In comparison, since the number of elements for driving the organic light emitting elements provided in each dot can be reduced, the aperture ratio can be improved.

It should be noted that which color to select from the complementary color of red, the complementary color of green, and the complementary color of blue may be determined according to the required image quality.
Further, even for colors other than the complementary color of red, the complementary color of green, and the complementary color of blue, it is possible to widen the range of the triangle having the chromaticity coordinates of red, the chromaticity coordinates of green, and the chromaticity coordinates of blue as vertices. If it is such a color, the above-mentioned effect can be acquired. Therefore, even if colors other than the complementary color of red, complementary color of blue, and complementary color of green are used, the chromaticity coordinates are outside the range of the triangle with red chromaticity coordinates, green chromaticity coordinates, and blue chromaticity coordinates as vertices. Any color may be used as long as it is an organic light-emitting element that emits light of the color it has.

(Embodiment 6)
In the present embodiment, an example of the third configuration of the present invention will be described. That is, red, green, and blue organic light emitting elements are provided on the first substrate, red, green, and blue organic light emitting elements are provided on the second substrate, and the first substrate is provided on the first substrate as viewed from the observer side. A display device having a structure in which different colors of the organic light emitting element and the organic light emitting element provided on the second substrate overlap will be described with reference to FIGS.

FIG. 29 shows a pixel structure of the display device of this embodiment mode. FIG. 29A shows the display screen side.
That is, FIG. 29B illustrates a pixel configuration on the first substrate, and FIG. 29C illustrates a pixel configuration on the second substrate as viewed from the observer side.
A first substrate having the pixel configuration shown in FIG. 29B and a second substrate having the pixel configuration shown in FIG. 29C are overlapped so that the surfaces on which the organic light-emitting elements are formed face each other. Thus, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG.
FIGS. 29B and 29C are top views as seen from the surface side on which the organic light emitting element is formed.
FIG. 29 shows the case where the display screen is formed only on the first substrate.

In FIG. 29B, 3100 is a red light emitting region formed by a red organic light emitting device, 3101 is a green light emitting region formed by a green organic light emitting device, and 3102 is a blue light emitting formed by a blue organic light emitting device. It is an area.
In FIG. 29C, 3103 is a blue light emitting region formed by a blue organic light emitting element, 3104 is a red light emitting region formed by a red organic light emitting element, and 3105 is a green light emitting formed by a green organic light emitting element. It is an area.
Note that, in FIG. 29, in order to make it easy to understand how the light emitting regions overlap, wiring and the like are not shown, and only the light emitting regions are shown.

In FIG. 29, an obliquely shaded portion on the right side indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate.
In the case of the present embodiment, the light emitting region formed on the first substrate and the light emitting region formed on the second substrate are approximately the same size and are formed so as to overlap at the same position. Therefore, the light shielding region of the first substrate and the light shielding region of the second substrate are also formed at substantially the same position.

A red light emitting region 3100, a green light emitting region 3101, a blue light emitting region 3102 of the first substrate,
When the blue light emitting region 3103, the red light emitting region 3104, and the green light emitting region 3105 of the second substrate are all made to emit light, the light emitting regions 3106, 3107, and 3108 of three different colors are formed when viewed from the observer side. Looks like it has been.
In this case, a light emitting region of a mixed color of red and blue is formed in 3106. In 3107, a light emitting region of mixed colors of green and red is formed. In 3108, a light emitting region of a mixed color of blue and green is formed.

Note that in FIG. 29A, in 3106, 3107, and 3108, since the light emitting region of the first substrate and the light emitting region of the second substrate overlap at the same position, the color of the light emitting region of the second substrate is the same. Is shown in parentheses.
That is, “R” and “(B)” described in 3106 indicate that the red light emitting region of the first substrate and the blue light emitting region of the second substrate overlap with each other. “G”, “
“(R)” indicates that the green light-emitting region of the first substrate and the red light-emitting region of the second substrate overlap each other, and “B” and “(G)” are displayed in 3108. Is described as
It shows that the blue light emitting region of the first substrate and the green light emitting region of the second substrate overlap.

Therefore, when only the red light emitting region 3100 of the first substrate is turned on, 3106
Is a red light emitting area. When only the green light emitting area 3101 of the first substrate is turned on, 3107 is a green light emitting area, and when only the blue light emitting area 3102 of the first substrate is turned on. 3108 is a blue light emitting region. When only the blue light emitting region 3103 of the second substrate is turned on, 3106 becomes a blue light emitting region, and when only the red light emitting region 3104 of the second substrate is turned on, 3107 becomes a red light emitting region. When only the green light emitting region 3105 of the second substrate is turned on, 3108 becomes a green light emitting region.

FIG. 30 is a cross-sectional view taken along the line AA ′ of FIG. FIG. 30 is a schematic cross-sectional view for easy understanding of the cross-sectional structure of the display device of the present invention. The first substrate, the red, green, and blue organic light-emitting elements formed on the first substrate, the second Only the red, green, and blue organic light emitting elements formed on the substrate and the second substrate are shown.

In FIG. 30, a red (R) organic light emitting element 1011, a green (G) organic light emitting element 1012, and a blue organic light emitting element 1013 are formed on a first substrate 1000, and the second
A blue organic light emitting element 1027, a red organic light emitting element 1028, and a green organic light emitting element 1029 are formed on the substrate 1001.

The organic light emitting elements 1011, 1012, and 1013 formed on the first substrate 1000 include the direction of the surface of the first substrate 1000 where the organic light emitting elements 1011, 1012, and 1013 are provided, and the first substrate 1000. A dual emission type that emits light in the direction of the surface opposite to the surface on which the organic light emitting elements 1011, 1012, and 1013 are provided, that is, in the direction of the second substrate 1001 (
Dual emission type). The organic light emitting elements 1027, 1028, and 1029 formed over the second substrate 1001 are in the direction of the surface of the second substrate 1001 where the organic light emitting elements 1027, 1028, and 1029 are provided, that is, the first It has a structure of a top emission type (top emission type) that emits light in the direction of the substrate.
In FIG. 30, white arrows indicate the directions of light emission from the respective organic light emitting elements.

The red organic light emitting element 1011 includes a first electrode 1002, a second electrode 1004, and a layer 1003 containing an organic compound sandwiched between the first electrode 1002 and the second electrode 1004. The green organic light emitting element 1012 includes a first electrode 1005, a second electrode 1007,
The layer 1006 includes an organic compound sandwiched between the first electrode 1005 and the second electrode 1007. The blue organic light emitting element 1013 includes a first electrode 1008 and a second electrode 1.
010, a layer 100 containing an organic compound sandwiched between the first electrode 1008 and the second electrode 1010
9.
The blue organic light emitting element 1027 includes a first electrode 1017, a second electrode 1019, and a first electrode 1.
A layer 1018 containing an organic compound sandwiched between 017 and the second electrode 1019 is formed. The red organic light emitting element 1028 includes a first electrode 1020, a second electrode 1022, and a layer 1021 containing an organic compound sandwiched between the first electrode 1020 and the second electrode 1022. The green organic light emitting element 1029 includes a first electrode 1023, a second electrode 1025,
The layer 1024 includes an organic compound sandwiched between the first electrode 1023 and the second electrode 1025.

In addition, what is necessary is just to use the material described in other embodiment as the material which forms the 1st electrode of each organic light emitting element, and a 2nd electrode.

As shown in FIG. 30, the red organic light emitting element 1011 formed on the first substrate faces the blue organic light emitting element 1027 formed on the second substrate, and is formed on the first substrate. The green organic light-emitting element 1012 is opposed to the red organic light-emitting element 1028 formed on the second substrate, and the blue organic light-emitting element 1013 formed on the first substrate is the second.
The first substrate 1 so as to face the green organic light emitting element 1029 formed on the substrate.
000 and the second substrate 1001 are provided so as to overlap each other.

In this way, the resolution of the image can be improved by overlapping different colors.

This point will be described with reference to FIGS.
FIG. 16 is a top view of a portion in which dots are formed in 5 rows × 7 columns as viewed from the observer side in a normal display device that performs color display using red, green, and blue dots as one pixel. .
In FIG. 16, R represents a red light emitting region (red dot) formed by a red organic light emitting device, G represents a green light emitting region (green dot) formed by a green organic light emitting device, and B represents The blue light emission area | region (blue dot) formed of the blue organic light emitting element is shown.

For example, when it is desired to display a blue diagonal line, as shown in FIG.
00, 1101, and 1102 are turned on. In FIG. 16, dots indicated by diagonal lines indicate dots that are lit, and dots that are not indicated by diagonal lines indicate dots that are off.

FIG. 17 is a top view of a portion of the first substrate on which dots are formed in 5 rows × 7 columns as viewed from the display screen side in the display device of this embodiment. Since the dots on the first substrate and the dots on the second substrate appear to overlap at the same position when viewed from the observer side as shown in FIG. 29, the dots on the second substrate are parentheses in FIG. It is written.

That is, in FIG. 17, R indicates a red light emitting region (red dot) formed by a red organic light emitting element provided on the first substrate, and G indicates a green color provided on the first substrate. B indicates a green light emitting region (green dot) formed by the organic light emitting device, B indicates a blue light emitting region (blue dot) formed by the blue organic light emitting device provided on the first substrate, R) indicates a red light emitting region (red dot) formed by a red organic light emitting element provided on the second substrate, and (G) indicates a green organic light emitting element provided on the second substrate. (B) shows a blue light-emitting region (blue dot) formed by a blue organic light-emitting element provided on the second substrate.
Thus, for example, the dot 1100 is a dot formed on the first substrate is blue,
The dots formed on the second substrate (overlapping at the same position as the dots formed on the first substrate when viewed from the observer side) are green.

When the display device of this embodiment is used to display blue diagonal lines as in the normal display device shown in FIG. 16, it is formed on the first substrate as shown in FIG. In addition to the blue dots 1100, 1101, and 1102, the blue dots 1103 and 1104 formed on the second substrate are turned on. Also in FIG. 17, dots indicated by diagonal lines indicate dots that are lit, and dots not indicated by diagonal lines indicate dots that are off. Of the lit dots, the dot 1100 formed on the first substrate.
1101 and 1102 are diagonally inclined to the right, and among the lit dots, dots 1103 and 1104 formed on the second substrate are diagonally inclined to the left.

As can be seen from a comparison between FIG. 16 and FIG. 17, the resolution of the image in FIG. 17 is higher than that in FIG. In other words, the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate can improve the image resolution by making the organic light emitting elements of different colors overlap each other. Therefore, higher-definition display can be performed.

FIGS. 29 and 30 show the case where the dots formed on the first substrate and the dots formed on the second substrate are arranged so as to overlap at the same position. It is not limited.
The light emitting region of the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are not configured so that the same colors overlap each other when viewed from the observer side. The resolution of the image can be improved. That is, the light emitting region of the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are such that different colors overlap at least partially when viewed from the observer side. If it is the structure, the effect of improving the resolution of an image will be acquired.
Therefore, different colors overlap each other in a state where the light emitting region of the organic light emitting element formed on the first substrate and the light emitting region of the organic light emitting element formed on the second substrate are slightly shifted. Also good.

The case where the light emitting area of the organic light emitting element formed on the first substrate and the light emitting area of the organic light emitting element formed on the second substrate are slightly shifted so that different colors partially overlap each other. 14 and 15 will be used for explanation.

FIG. 14 illustrates a pixel configuration of the display device of this embodiment mode. FIG. 14A shows the display screen side.
That is, FIG. 14B illustrates a pixel configuration on the first substrate, and FIG. 14C illustrates a pixel configuration on the second substrate when viewed from the observer side.
The first substrate having the pixel configuration shown in FIG. 14B and the second substrate having the pixel configuration shown in FIG. 14C are overlapped so that the surfaces on which the organic light emitting elements are formed face each other. Accordingly, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG.
14B and 14C are top views as seen from the surface side on which the organic light emitting element is formed.
FIG. 14 shows the case where the display screen is formed only on the first substrate.

In FIG. 14B, 900 is a red light emitting region formed by a red organic light emitting device, 901 is a green light emitting region formed by a green organic light emitting device, and 902 is blue light emitting formed by a blue organic light emitting device. It is an area.
In FIG. 14C, 903 is a part of a green light emitting region formed by a green organic light emitting element, 904 is a blue light emitting region formed by a blue organic light emitting element, and 905 is formed by a red organic light emitting element. The red light emitting region 906 is a part of the green light emitting region formed by the green organic light emitting element.

FIG. 14 shows a portion corresponding to a portion of one pixel in the first substrate. Therefore, only a part of the green light emitting regions 903 and 906 in FIG. 14C which is a cross-sectional view of the second substrate is shown.
In FIG. 14, in order to make it easy to understand how the light emitting areas overlap, wiring and the like are not shown, and only the light emitting areas are shown.
FIG. 14 shows the case where the display screen is formed only on the first substrate.

In FIG. 14B, 900 is a red light emitting region formed by a red organic light emitting device, 901 is a green light emitting region formed by a green organic light emitting device, and 902 is blue light emitting formed by a blue organic light emitting device. It is an area.
In FIG. 14C, 903 is a green light emitting region formed by a green organic light emitting element, 904 is a blue light emitting region formed by a blue organic light emitting element, and 905 is a red light emitting formed by a red organic light emitting element. A region 906 is a green light emitting region formed by a green organic light emitting element.

In FIG. 14, a diagonally right hatched portion indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate.
Therefore, when the first substrate and the second substrate are overlapped and viewed from the first substrate side (observer side), the red light emitting region 900, the green light emitting region 901, and the blue light emitting region 902 of the first substrate are displayed. In other regions, light emitted from the organic light emitting element formed on the second substrate is shielded from light.
Therefore, when viewed from the observer side, a part of the green light emitting region part 903, a part of the blue light emitting region 904, a part of the red light emitting region 905, and a part of the green light emitting region 906 of the second substrate. Some
The light is shielded by the light shielding region of the first substrate.

First substrate red light emitting region 900, green light emitting region 901, blue light emitting region 902, part green light emitting region 903 of second substrate, blue light emitting region 904, red light emitting region 905, part green light emitting region 906 , When viewed from the observer side, the light emitting areas 907 and 908 are emitted.
, 909, 910, 911, 912, 913, 914, and 915 seem to be formed.
In this case, a light emission region of a mixed color of red and green is formed in 907. In 908, a red light emitting region is formed. In 909, a light emitting region of a mixed color of red and blue is formed. In 910, a light emitting region of a mixed color of green and blue is formed. In 911, a green light emitting region is formed. 9
In 12, a light emitting region of mixed colors of green and red is formed. In 913, a light emitting region of a mixed color of blue and red is formed. In 914, a blue light emitting region is formed. In 915, a light emitting region of a mixed color of blue and green is formed.

Note that in 907, 909, 910, 912, 913, and 915 in FIG. 14A, the color of the light-emitting region of the second substrate is shown in parentheses.
That is, “R” and “(G)” described in 907 indicate that the red light-emitting region of the first substrate and the green light-emitting region of the second substrate are overlapped. “R” indicates that the region is formed only by the red light emitting region of the first substrate, and “R” and “(B)” are described in 909. , The red light emitting region of the first substrate and the blue light emitting region of the second substrate are overlapped, and “G” and “(B)” are shown in 910.
Indicates that the green light-emitting region of the first substrate and the blue light-emitting region of the second substrate overlap each other, and “G” in 911 indicates that the first light-emitting region overlaps the first substrate. , “G” and “(R)” are described in 912 as the green light emitting region of the first substrate and the second substrate. And “B” and “(R)” described in 913 indicate that the blue light emitting region of the first substrate and the red light emitting region of the second substrate are , “B” in 914 indicates that the region is formed only by the blue light emitting region of the first substrate, and “B”, “( G) ”means that the blue light emitting region of the first substrate and the green light emitting region of the second substrate are Now show that is.

Therefore, when only the red light emitting region 900 of the first substrate is turned on, 907 and 9
08 and 909 are red light emitting areas. When only the green light emitting area 901 of the first substrate is turned on, 910, 911 and 912 are green light emitting areas, and only the blue light emitting area 902 of the first substrate is used. When the lighting state is set, 913, 914, and 915 are blue light emitting regions. When only the green light emitting region 903 of the second substrate is turned on, 907 becomes a green light emitting region, and when only the blue light emitting region 904 of the second substrate is turned on, 909, 91
When 0 is a blue light emitting region and only the red light emitting region 905 of the second substrate is turned on, 912 and 913 are green light emitting regions, and only the green light emitting region 906 of the second substrate is turned on. In this case, 915 is a green light emitting area.

FIG. 15 is a cross-sectional view taken along line AA ′ of FIG. FIG. 15 is a schematic cross-sectional view for easy understanding of the cross-sectional structure of the display device of the present invention. The first substrate, the red, green, and blue organic light-emitting elements formed on the first substrate, the second Only the red, green, and blue organic light emitting elements formed on the substrate and the second substrate are shown.

In FIG. 15, a red (R) organic light emitting element 1011, a green (G) organic light emitting element 1012, and a blue organic light emitting element 1013 are formed on the first substrate 1000, and the second
On the substrate 1001, green organic light emitting elements 1026 and 1029, blue organic light emitting element 1
027, a red organic light emitting element 1028 is formed. In FIG. 15, only a part of the green organic light emitting elements 1026 and 1029 is shown.

In FIG. 15, the same components as those in FIG. 30 are denoted by the same reference numerals.
In FIG. 15, reference numeral 1026 denotes a green organic light-emitting element, which includes a first electrode 1014 and a second electrode 1014.
Electrode 1016, and a layer 1015 containing an organic compound sandwiched between the first electrode 1014 and the second electrode 1016.

As shown in FIG. 15, the red organic light emitting element 1011 formed on the first substrate is part of the green organic light emitting element 1026 formed on the second substrate and the blue organic light emitting element 1.
The green organic light emitting element 1012 formed on the first substrate is opposed to a part of 027, and a part of the blue organic light emitting element 1027 and the red organic light emitting element formed on the second substrate. A blue organic light emitting element 1013 and a green organic light emitting element 10 are formed on a second substrate so that a blue organic light emitting element 1013 formed on a first substrate is opposed to a part of 1028.
The first substrate 1000 and the second substrate 1001 are provided so as to be opposed to a part of the first substrate 1000. In other words, the organic light emitting elements formed on the first substrate and the organic light emitting elements formed on the second substrate are overlapped with a slight shift, and the organic light emitting elements of different colors partially overlap each other. It is provided as follows.

In this way, the resolution of the image can be improved by overlapping different colors.

(Embodiment 7)
In the present embodiment, the fourth structure of the present invention, that is, one of the first substrate and the second substrate is provided with red, green, and blue organic light-emitting elements, and the first substrate or the second substrate is provided.
An example in which a blue organic light emitting element is provided on the other of the substrates will be described.
A red, green or blue organic light emitting element is provided on one of the first substrate and the second substrate,
In order to obtain a structure in which a blue organic light-emitting element is provided on the other of the first substrate and the second substrate, the white organic light-emitting element 120 provided on the second substrate in Embodiment 1 is used. Instead, a blue organic light emitting element may be provided.

When the white organic light emitting element is provided, it is necessary to uniformly change the brightness of the entire display screen. Therefore, the light emission formed by the red, green, and blue organic light emitting elements provided on the first substrate. The region and the white organic light emitting element were uniformly overlapped. However, when a blue organic light emitting element is provided on the second substrate, it is provided for the purpose of supplementing the luminance of the blue organic light emitting element provided on the first substrate. Therefore, the red organic light emitting element provided on the first substrate is provided. It is not necessary to uniformly overlap the light emitting region formed by the green and blue organic light emitting elements and the blue organic light emitting element. For example, a blue organic light emitting element may be provided on the second substrate so as to overlap only with a blue organic light emitting element provided on the first substrate.

In addition, the organic light emitting element provided on the second substrate is not limited to the blue organic light emitting element. For example, when the luminance is insufficient with only the red organic light emitting element provided on the first substrate, the red organic light emitting element may be provided, or the green organic light emitting element provided on the first substrate may be provided. If the luminance is insufficient with only the light emitting element, a green organic light emitting element may be provided.

In this example, an example of a pixel structure of the second structure of the present invention, which is different from that in Embodiment Mode 4, will be described.
FIG. 20 shows a pixel structure of a display device different from that in Embodiment Mode 4.
20A shows a pixel configuration when viewed from the display screen side, FIG. 20B shows a pixel configuration on the first substrate, and FIG. 20C shows a pixel configuration on the second substrate. .
The first substrate having the pixel configuration shown in FIG. 20B and the second substrate having the pixel configuration shown in FIG. 20C are overlapped so that the surfaces on which the organic light-emitting elements are formed face each other. Accordingly, when viewed from the display screen side, that is, the observer side, the pixel configuration is as shown in FIG. Note that the display screen is formed on the first substrate. FIGS. 20B and 20C are top views as seen from the side on which the organic light emitting element is formed.

In FIG. 20B, reference numerals 1400, 1403, and 1406 denote red light emitting regions formed by red (R) organic light emitting elements, and reference numerals 1401, 1404, and 1407 denote green light emitting regions formed by green (G) organic light emitting elements. 1402, 1405, 1408 are blue light emitting regions formed by blue (B) organic light emitting elements.

In FIG. 20C, 1410 is a cyan light emitting region formed by cyan (C) organic light emitting elements, 1411 is a magenta light emitting region formed by magenta (M) organic light emitting elements, and 1412 is yellow (Y). This is a yellow light emitting region formed by an organic light emitting element.
In FIG. 20, wirings are not shown for easy understanding of how the light emitting regions overlap.

As shown in FIG. 20, a red light emitting area 1400, a green light emitting area 1401, and a blue light emitting area 14
02 and the cyan light emitting area 1410 overlap, the red light emitting area 1403, the green light emitting area 1404, the blue light emitting area 1405 and the magenta light emitting area 1411 overlap, and the red light emitting area 1406, the green light emitting area 1407, and the blue light emitting area. 1408 and the yellow light emitting area 1412 overlap each other. By adopting such a configuration, it is possible to express colors that could not be expressed only with the three colors of red, green, and blue.

In FIG. 20, the diagonally right shaded portion indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the first substrate. Further, the diagonally shaded portion on the left indicates a light-shielded region because wiring, an element for driving the organic light emitting element, and the like are formed on the second substrate. Therefore, when the first substrate and the second substrate are overlapped and viewed from the first substrate side (observer side), the red light emitting region 1400 of the first substrate is displayed.
1403, 1406, green light emitting area 1401, 1404, 1407, blue light emitting area 14
In regions other than 02, 1405, and 1408, light emitted from the organic light-emitting element formed on the second substrate is shielded. Therefore, when viewed from the observer side, a part of the cyan light emitting region 1410, a part of the magenta light emitting region 1411, and a part of the yellow light emitting region 1412 of the second substrate are shielded by the light shielding region of the first substrate. End up.

Red light emitting areas 1400, 1403, 1406, green light emitting areas 1401, 1 of the first substrate
404, 1407, blue light emitting areas 1402, 1405, 1408, cyan light emitting area 1410, magenta light emitting area 1411 and yellow light emitting area 1412 of the second substrate all emit light, when viewed from the observer side, light emitting area 1413, 1414, 1415, 1416, 14
It appears that nine different color light emitting regions 17, 1418, 1419, 1420, and 1421 are formed.
In this case, a light emitting region of a mixed color of red and cyan is formed in 1413. In 1414, a light emitting region of a mixed color of green and cyan is formed. In 1415, a light emitting region of a mixed color of blue and cyan is formed. In 1416, red and magenta light emitting regions are formed. In 1417, a light emitting region of a mixed color of green and magenta is formed. In 1418, a light emitting region of a mixed color of blue and magenta is formed. In 1419, a light emitting region of a mixed color of red and yellow is formed. 1420
A light emitting region of a mixed color of green and yellow is formed in. In 1421, a light emitting region of a mixed color of blue and yellow is formed.

Note that reference numerals 1413, 1414, 1415, 1416, 1417, and 1418 in FIG.
1419, 1420, and 1421, the color of the light emitting region of the second substrate is shown in parentheses.
That is, “R” and “(C)” described in 1413 indicate that the red light emission region of the first substrate and the cyan light emission region of the second substrate overlap. 1414 includes “G”, “(
“C)” indicates that the green light emitting region of the first substrate and the cyan light emitting region of the second substrate overlap. 1415 describes “B” and “(C)”
It shows that the blue light emitting region of the substrate of FIG. 1 overlaps the cyan light emitting region of the second substrate. 141
In FIG. 6, “R” and “(M)” indicate that the red light emitting region of the first substrate and the magenta light emitting region of the second substrate overlap. “G” and “(M)” in 1417 indicate that the green light emitting region of the first substrate and the magenta light emitting region of the second substrate overlap. “B” and “(M)” in 1418 indicate that the blue light emitting region of the first substrate and the magenta light emitting region of the second substrate overlap. 14
“R” and “(Y)” in 19 indicate that the red light emitting region of the first substrate and the yellow light emitting region of the second substrate overlap. “G” and “(Y)” described in 1420 indicate that the green light emitting region of the first substrate and the yellow light emitting region of the second substrate overlap. “B” and “(Y)” described in 1421 indicate that the blue light emitting region of the first substrate and the yellow light emitting region of the second substrate overlap.

Therefore, in the case where only the red light emitting region 1400 of the first substrate is turned on, 1413 is obtained.
Is a red light emitting area, when only the green light emitting area 1401 of the first substrate is turned on, 1414 is a green light emitting area, and when only the blue light emitting area 1402 of the first substrate is turned on, , 1415 are blue light emitting regions. Cyan emission region 1410 of the second substrate
1413, 1414, and 1415 are cyan light emitting areas when only the light emitting state is turned on, and 1416, 1 and 1415 are turned on when only the magenta light emitting area 1411 of the second substrate is turned on.
When 417 and 1418 are magenta light emitting areas and only the yellow light emitting area 1412 of the second substrate is turned on, 1419, 1420 and 1421 are yellow light emitting areas.

In this embodiment, an example in which organic light emitting elements of three colors of cyan, magenta, and yellow are formed is not limited to the case of forming three colors of organic light emitting elements to be formed. Only one or two of the three colors of cyan, magenta, and yellow may be formed.
Further, the color type of the organic light emitting element to be formed is not limited to only cyan, magenta, and yellow which are complementary colors of red, green, and blue. Colors other than cyan, magenta, and yellow may be used as long as they are colors other than red, green, and blue and can increase the range of colors that can be displayed. In other words, any organic light emitting element that emits light of a color having a chromaticity coordinate outside the range of a triangle having the chromaticity coordinate of red, the chromaticity coordinate of green, and the chromaticity coordinate of blue as a vertex. There may be.

In this embodiment, red, green, and blue organic light emitting elements are provided on the first substrate, cyan, magenta, and yellow organic light emitting elements are provided on the second substrate, and a display screen is provided on the first substrate. Although only the case of forming was described, it is not limited to this.

The organic light emitting element provided on the first substrate may be replaced with the organic light emitting element provided on the second substrate. In other words, cyan, magenta, and yellow light emitting elements may be provided on the first substrate, and red, green, and blue organic light emitting elements may be provided on the second substrate.

Alternatively, the display screen may be formed on both the first substrate and the second substrate.
In this case, the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate may be a dual emission type organic light emitting element. That is, the first electrode and the second electrode of the organic light-emitting element provided on the first substrate and the organic light-emitting element provided on the second substrate may be formed using a transparent conductive film.

In the example described in the above embodiment, the display device which seals the first substrate and the second substrate provided with the organic light emitting elements by facing each other is described. A display device having a structure in which a first substrate and a second substrate are sealed using a third substrate in addition to the first substrate and the second substrate will be described with reference to FIGS.

In this example, as in the first embodiment, when the red, green, and blue organic light emitting elements are formed on the first substrate and the white organic light emitting element is provided on the second substrate, that is, according to the present invention. In the first configuration, the case of the arrangement (A) will be described as an example, but the present invention is not limited to this case. The combination of the organic light emitting elements formed on the first substrate and the second substrate can be carried out in any case of the first to fourth configurations of the present invention.

In FIG. 21A, 1500 is the first substrate, 1501 is the second substrate 1530, and the third substrate 1530 is the third substrate.
It is a substrate.
For the first substrate 1500 and the second substrate 1501, a light-transmitting substrate such as a glass substrate or a plastic substrate is used.

The first substrate 1500 includes a red organic light emitting element 1521 and a green organic light emitting element 152.
2 and a blue organic light emitting element 1523 are formed.
The second substrate 1501 is provided with a white organic light emitting element 1520.

The red organic light emitting element 1521 includes a first electrode 1510, a second electrode 1508, and a first electrode
The organic compound layer 1509 is sandwiched between the first electrode 1510 and the second electrode 1508.
The green organic light emitting element 1522 includes a first electrode 1513, a second electrode 1511, and a first electrode
The organic compound layer 1512 is sandwiched between the first electrode 1513 and the second electrode 1511.
The blue organic light emitting element 1523 includes a first electrode 1516, a second electrode 1514, and a first electrode
The organic compound layer 1515 is sandwiched between the first electrode 1516 and the second electrode 1514.

The white organic light-emitting element 1520 includes a first electrode 1505, a second electrode 1507, and an organic compound layer 1506 sandwiched between the first electrode 1505 and the second electrode 1507. Yes.

And as shown to FIG. 21 (A), the organic light emitting elements 1521 and 1522 of the first substrate,
The first substrate and the second substrate are bonded so that the surface provided with 1523 and the surface of the second substrate opposite to the surface provided with the organic light emitting element 1520 face each other. Yes.

Further, the second substrate and the third substrate are bonded so that the surface of the second substrate on which the organic light emitting element 1520 is provided and the third substrate face each other.

For the first substrate, the second substrate functions as a counter substrate, and for the second substrate, the third substrate functions as a counter substrate.

The organic light emitting elements 1521, 1522, and 1523 provided on the first substrate are the first substrate 15.
The organic light-emitting device has a dual emission type structure that emits light in the direction of both sides of 00.
Therefore, the first electrode 1510 and the second electrode 1508 included in the organic light emitting element 1521, the first electrode 1513 and the second electrode 1511 included in the organic light emitting element 1522, and the first electrode included in the organic light emitting element 1523. 1516 and the second electrode 1514 are all formed of a transparent conductive film.

The organic light emitting element 1520 provided on the second substrate emits light in the direction of the surface opposite to the surface on which the organic light emitting element 1520 of the second substrate 1501 is provided, that is, in the direction of the first substrate. An organic light emitting device having a bottom emission type (bottom emission type) structure is provided.
Therefore, the first electrode 1505 of the organic light emitting element 1520 is formed of a transparent conductive film, and the second electrode 1507 is an electrode having a reflective function. An electrode having a reflective function may be formed using the material exemplified in Embodiment 1.

Note that in FIG. 21A, white arrows indicate the directions of light emission from the respective organic light-emitting elements.

By adopting the configuration described above, the organic light emitting elements 1521, 1522, 1523 are formed.
Emits light in the direction of both surfaces of the first substrate 1500, and the organic light emitting element 1520 is connected to the second substrate 1.
Light is emitted in the direction opposite to the surface provided with the white organic light emitting element 1520 of 501. Light emitted from the organic light emitting elements 1521, 1522, and 1523 toward the second substrate 1501 is the second electrode 150 of the white organic light emitting element 1520 provided on the second substrate 1501.
7 is reflected by 7 (electrode having a reflection function) and proceeds in the direction of the first substrate 1500. Thus, a display screen is formed on the first substrate 1500. Then, an image whose brightness is adjusted by the white organic light emitting element 1520 is displayed on the display screen.

Note that, in the display device having a structure sealed with three substrates as in this embodiment, the organic light emitting element provided on the first substrate and the second light emitting device are provided similarly to the display device having a structure sealed with two substrates. It is also possible to adopt a structure in which the organic light emitting element provided on the substrate is replaced or a structure in which display screens are formed on both sides.

FIG. 21B shows an example in which the organic light emitting element provided on the first substrate and the organic light emitting element provided on the second substrate are interchanged.
In FIG. 21B, the same components as those in FIG.

The surface of the second substrate 1501 on which the organic light emitting element 1520 is provided, and the first substrate 150
The first substrate 1500 and the second substrate 1501 are bonded so that the surface on which the 0 organic light emitting elements 1521, 1522, and 1523 are provided and the opposite surface face each other.
In addition, the first substrate and the third substrate are bonded so that the surface of the first substrate 1500 where the organic light emitting elements 1521, 1522, and 1523 are provided and the third substrate face each other.

FIG. 21B is different from FIG. 21A in that the arrangement of the first substrate 1500 and the second substrate 1501 is switched, and the organic light-emitting element 1521 provided in the first substrate.
, 1522 and 1523 are formed of electrodes having a reflective function, and the organic light-emitting element 152 provided on the second substrate 1501
The zero second electrode 1507 is formed of a transparent conductive film.

With such a configuration, the organic light emitting element 15 provided on the first substrate 1500.
21, 1522, 1523 are the organic light emitting elements 1521, 1522 of the first substrate 1500,
Light is emitted in the direction of the surface opposite to the surface on which 1523 is provided, and the organic light emitting element 1520 provided on the second substrate 1501 emits light in the direction of both surfaces of the second substrate. The light emitted from the white organic light emitting element 1520 in the direction of the first substrate 1500 is the second electrode (electrode having a reflection function) of the organic light emitting elements 1521, 1522, and 1523 provided on the first substrate. Is reflected in the direction of the second substrate 1501. Accordingly, a display screen is formed on the second substrate 1501. Then, an image whose brightness is adjusted by the white organic light emitting element 1520 is displayed on the display screen.

In addition, an example in which a display screen is formed on both sides in a display device having a structure sealed with three substrates will be described with reference to FIGS.

In FIG. 22, the same symbols are attached to the same components as those in FIG.
22 differs from FIG. 21A in that the second electrode 1507 of the organic light-emitting element 1520 provided over the second substrate 1501 is formed using a transparent conductive film.

With such a configuration, the organic light emitting element 15 provided on the first substrate 1500.
21, 1522, 1523, and the organic light emitting element 1520 provided on the second substrate 1501.
Since the first electrode and the second electrode are all formed of a transparent conductive film, the organic light emitting elements 1521, 1522, and 1523 provided on the first substrate and the white light provided on the second substrate are provided. The organic light emitting elements 1520 are all dual emission type organic light emitting elements. Therefore, as shown in FIG. 22, since light is emitted from both the first substrate 1500 and the second substrate 1501, the first
The display screen can be formed on both the substrate and the second substrate.

The image visually recognized on the display screen formed on the first substrate and the image visually recognized on the display screen formed on the second substrate are mirror images. Further, since the first substrate and the second substrate are light-transmitting substrates, the display screen is formed in a state where the scenery on the other side can be seen through the first substrate and the second substrate.

In addition, by providing polarizing plates on the first substrate and the second substrate, both the first substrate and the display screen formed on the first substrate and the display screen formed on the second substrate It is also possible to hide the scenery on the other side through the second substrate.

Alternatively, a display screen can be formed only on the third substrate.
In this case, the organic light emitting element provided on the first substrate is an upward emitting organic light emitting element, the organic light emitting element provided on the second substrate is a dual emission organic light emitting element, and the second substrate and the third substrate are used. May be a translucent substrate. That is, the second electrode of the organic light emitting element provided on the first substrate is formed of a transparent conductive film, and the first electrode and the second electrode of the organic light emitting element provided on the second substrate are formed of a transparent conductive film. That's fine.

For example, FIG. 21A shows a configuration in which a display screen is formed only on the first substrate 1500, but in order to make a configuration in which a display screen is formed only on the third substrate 1530, the first screen is used. The second electrode 1 of the organic light emitting elements 1521, 1522, and 1523 provided on the substrate 1500.
508, 1511, and 1514 are formed of a transparent conductive film, and the first electrode 1505 and the second electrode 1507 of the organic light emitting element 1520 formed on the second substrate 1501 are formed of a transparent conductive film. Good.

In this embodiment, an example of a more detailed cross-sectional structure of the display device shown in FIG. 1 will be described with reference to FIG. FIG. 23 is a cross-sectional view taken along the line AA ′ of the display device shown in FIG. In addition,
23 shows a case where the display device of FIG. 1 has the cross-sectional structure shown in FIG.
A more detailed cross-sectional structure is shown. That is, in the display device of FIG.
The first substrate on which the green organic light-emitting element and the blue organic light-emitting element are formed and the second substrate on which the white organic light-emitting element is formed are overlapped to form a display screen on the first substrate. of the case,
An example of a more detailed cross-sectional structure is shown.
In FIG. 23, the cross-sectional portion of the pixel portion shows only a cross-sectional view of one pixel.

First, TFTs 1620R, 1620G, which are provided in the pixel portion over the first substrate 1601,
1620B, a peripheral driving circuit TFT 1650, an insulating film 1612, and a protective film 1613 are formed. Simultaneously with these TFTs, lead wires 1614 and 1615 and a connection terminal 1616 are formed. Reference numeral 1620R denotes a thin film transistor for driving a red organic light emitting element.
20G is a thin film transistor for driving a green organic light emitting element, and 1620B is a thin film transistor for driving a blue organic light emitting element.

Next, a first electrode 1641 to be an anode (or a cathode) of the organic light emitting elements 1621R, 1621G, and 1621B is formed, and an insulator (partition wall) 1628 that covers an end portion of the first electrode is formed. Next, a layer containing an organic compound and a second electrode are formed to form an organic light emitting element 1621R,
1621G and 1621B are formed.
In addition, 1621R is a red organic light emitting element, 1621G is a green organic light emitting element, 1621
B is a blue organic light emitting element, and the first electrode and the second electrode of each organic light emitting element are formed using a transparent conductive film. By forming the first electrode and the second electrode of each organic light-emitting element with a transparent conductive film, a dual emission type structure is obtained.

Then, a protective film 1643 is formed over the organic light emitting elements 1621R, 1621G, and 1621B.

Note that the layer containing an organic compound in the organic light-emitting element 1621R contains a red light-emitting material, and the layer containing an organic compound in the organic light-emitting element 1621G contains a green light-emitting material and contains the organic compound in the organic light-emitting element 1621B. The containing layer contains a blue light emitting material.

In addition, the TFT 1610W and the peripheral driving circuit TFT 1651 are also formed over the second substrate 1606.
An insulating film 1602 and a protective film 1603 are formed. Simultaneously with the TFT, the wiring lines 1624, 1
625 and a connection terminal 1636 are formed. The TFT 1610W is a thin film transistor for driving a white organic light emitting element.

Next, a first electrode 1640 to be an anode (or a cathode) of the organic light emitting element 1611W is formed, and an insulator (partition wall) 1608 covering an end portion of the first electrode is formed. Next, a layer containing an organic compound and a second electrode are formed to form the organic light emitting element 1611W.
The organic light emitting element 1611W is a white organic light emitting element, and the organic light emitting element 1611 is used.
The first electrode of W is formed of an electrode having a reflection function, and the second electrode is formed of a transparent conductive film.

Then, a protective film 1642 is formed on the organic light emitting element 1611W. Note that the layer including an organic compound in the organic light emitting element 1611W includes a white light emitting material.

Next, the first substrate 1601 and the second substrate 1606 are combined with the sealant 1605 and the filler 1.
Paste with 607. A transparent material is used for the filler 1607. Fig. 2
3, the surface of the first substrate on which the organic light emitting elements 1621R, 1621G, and 1621B are formed and the surface of the second substrate on which the organic light emitting element 1611W is formed are opposed to each other.
In addition, the organic light emitting elements 1621R, 1621G, and 1621B formed on the first substrate and the organic light emitting element 1611W formed on the second substrate are arranged to overlap each other. In this way, a display device for full color display in which the brightness can be adjusted by the organic light emitting element that emits white light is completed.

Finally, FPCs 1618 and 1638 are attached to the connection terminals 1616 and 1636 by anisotropic conductive films 1619 and 1639, respectively.

In the display device shown in FIG. 23, the organic light emitting elements 1621R, 1
621G and 1621B emit light in the direction of both surfaces of the first substrate. 1621R, 1621G,
The light emitted from 1621B toward the second substrate is reflected by the first electrode (electrode having a reflection function) of the white organic light emitting element 1611W formed on the second substrate, and is directed toward the first substrate. move on. Moreover, the organic light emitting element 1611W formed on the second substrate emits light in the direction of the first substrate. Therefore, the observer can visually recognize the display by light emission of each organic light emitting element that has passed through the first substrate. That is, the display screen is formed on the first substrate.
In FIG. 23, white arrows indicate the direction of light emission from each organic light emitting element.

In the case of the structure shown in FIG. 23, the organic light emitting elements 1621R, 1621G, and 162 of the first substrate.
Only white light emitted from the organic light emitting element 1611W formed on the second substrate in a portion where 1B is not formed, for example, a portion where the TFTs 1620R, 1620G, and 1620B are formed passes through the first substrate. Therefore, white light may appear to float in that portion. In such a case, an insulator (partition wall) 1628 covering the end portion of the first electrode formed over the first substrate may be colored so that the partition wall 1628 functions as a black matrix. In order to color the partition 1628, the partition may be formed using a resin material in which fine particle pigments are dispersed.

In addition, a configuration in which the arrangement of the first substrate and the second substrate is replaced in the configuration of FIG. 23 will be described with reference to FIG. FIG. 24 does not show a connection portion with the peripheral driver circuit or the FPC, and shows a cross-sectional view of one pixel in the pixel portion.
In FIG. 24, the same symbols are added to the components common to FIG.

The manufacturing process of the display device illustrated in FIG. 24 may be performed in the same manner as the manufacturing process of the display device illustrated in FIG. 23. However, in the case of the display device illustrated in FIG. Element 1
The first electrodes 621R, 1621G, and 1621B are electrodes having a reflective function, and the second electrode is formed using a transparent conductive film. Further, the organic light emitting element 1611 formed on the second substrate.
The first electrode and the second electrode of W are formed of a transparent conductive film.

In the display device shown in FIG. 24, organic light emitting elements 1621R, 1 formed on the first substrate,
Reference numerals 621G and 1621B denote organic light emitting elements 1621R, 1621G, and 1621B on the first substrate.
Emits light in the direction of the surface on which is formed. That is, the organic light emitting elements 1621R, 1621G,
Light emitted from 1621B is emitted in the direction of the second substrate. Further, the organic light emitting element 1611W formed on the second substrate emits light in the direction of both surfaces of the second substrate. Light emitted from the 1611W toward the first substrate is the organic light emitting elements 1621R and 1621G formed on the first substrate.
, 1621B is reflected by the first electrode (electrode having a reflection function) and proceeds in the direction of the second substrate. Therefore, the observer can visually recognize the display by the light emission of each organic light emitting element that has passed through the second substrate. That is, the display screen is formed on the second substrate.
In FIG. 24, white arrows indicate the direction of light emission from each organic light emitting element.

In the display device shown in FIG. 24, the organic light emitting elements 1621R and 1621 of the second substrate.
An organic light emitting element 1611W is formed in a portion through which light emitted from G and 1621B passes. Therefore, since the partition 1608 does not exist in a portion of the second substrate where light emitted from the organic light emitting elements 1621R, 1621G, and 1621B passes, light emitted from the organic light emitting elements 1621R, 1621G, and 1621B is emitted. The structure is easy to penetrate.

In addition, the interlayer insulating film 1602 and the protective film 1603 are made of a material having a high transmittance with respect to light emission of the organic light emitting element, so that light emitted from the organic light emitting elements 1621R, 1621G, and 1621B can be easily transmitted. In order to further increase the transmittance, the organic light emitting element 1621R
, 1621G and 1621B may have a structure in which the interlayer insulating film 1602 or the protective film 1603 is selectively removed in a portion where light emission from the 1621G and 1621B passes.

23 and 24 show an example in which a TFT for driving an organic light emitting element uses a top gate structure, but the structure of the TFT is not limited to the top gate, and a bottom gate structure TFT is known. The TFT structure can be used.

23 and 24 has a structure in which a display screen is formed only on one surface of the display device, but a structure in which display screens are formed on both surfaces of the display device (the first substrate and the first substrate). Or a structure in which a display screen is formed on the second substrate).
In that case, the organic light emitting elements 1621R, 1621G, 1 formed on the first substrate
The first electrode and the second electrode of 621B and the organic light emitting element 1611W formed over the second substrate may be formed using a transparent conductive film.

In this example, Embodiment 1 in which a white organic light-emitting element was formed on the second substrate.
However, the present invention can also be applied to other embodiments and other examples.

In this embodiment, a configuration example in which the scenery on the other side is not seen through the first substrate and the second substrate when performing double-sided display in the present invention will be described with reference to FIG.

FIG. 31 is a cross-sectional view of a display device that performs double-sided display. A white arrow indicates a light emission direction.
In FIG. 31A, reference numeral 4000 denotes a first substrate, and 4001 denotes a second substrate. Although not shown, each of the first substrate 4000 and the second substrate 4001 has a double-sided light emitting organic light emitting element formed on one surface. The first substrate 4000 and the second substrate 4001 have the sealing materials 4002 and 40 so that the surfaces on which the organic light emitting elements are formed face each other.
The panel is configured by sealing with 03. Then, the first polarizing plate 4004 and the second polarizing plate 4005 are arranged so that the polarization directions of the light are perpendicular to each other with the sealed first substrate and second substrate interposed therebetween. The two polarizing plates of the first polarizing plate 4004 and the second polarizing plate 4005 can block outside light by being arranged so that the polarization directions of light are orthogonal to each other. Further, since light emitted from the panel passes through only one polarizing plate, display can be performed. Therefore, by providing the first polarizing plate 4004 and the second polarizing plate 4005 in this manner, the portion other than the portion that emits light and performs display becomes black, and either the first substrate side or the second substrate side is displayed. Since the background can be prevented from being seen through even when viewed from the screen, it is possible to prevent the display screen from becoming difficult to recognize.

Alternatively, a λ / 4 wavelength plate may be provided between the first substrate 4000 and the first polarizing plate 4004 and between the second substrate 4001 and the second polarizing plate 4005. This structural example is shown in FIG.
In FIG. 31B, the same components as those in FIG. 31A are denoted by the same reference numerals.
FIG. 31B is different from FIG. 31A in that a first λ / 4 wavelength plate 4006 is provided between the first substrate 4000 and the first polarizing plate 4004, and the second substrate. This is that a second λ / 4 wavelength plate 4007 is provided between 4001 and the second polarizing plate 4005. By providing a λ / 4 wavelength plate between the first substrate and the first polarizing plate, and between the second substrate and the second polarizing plate, the first substrate and the second polarizing plate are provided. In addition to not being able to see the scenery on the other side through the substrate, it is possible to prevent a decrease in contrast due to reflection of external light on the panel.

31A and 31B, between the first substrate and the first polarizing plate, between the first substrate and the first λ / 4 wavelength plate, and between the first λ / 4 wavelength. Between the second substrate and the second polarizing plate, and between the second substrate and the second first λ / 4 wavelength plate. while,
Although the second λ / 4 wavelength plate and the second polarizing plate are described with a gap therebetween, the present invention is not particularly limited, and the second λ / 4 wavelength plate may be provided so as to be in contact with each other.

In the configuration of FIG. 31, a first λ / 2 wavelength plate is provided between the first polarizing plate 4004 and the first λ / 4 wavelength plate 4006, and the first polarizing plate 4005 and the second λ wavelength plate are provided. / 4 wavelength plate 4007
A second λ / 2 wavelength plate may be provided between the two.

In the present embodiment, the configuration example in which the scenery on the other side is not seen through the first substrate and the second substrate when performing double-sided display has been described.
When performing single-sided display, there is no need to prevent the scenery on the other side from being seen through the first substrate and the second substrate, so there is no need to provide a polarizing plate, but external light is reflected on the panel. It is necessary to prevent a decrease in contrast due to. Therefore, in the case of single-sided display, a configuration in which a λ / 4 wavelength plate is provided between the display screen and the viewer, or λ / 4 between the display screen and the viewer.
When the wave plate and the λ / 2 wave plate are provided, it is possible to prevent a decrease in contrast due to reflection of external light on the panel.

This embodiment can be implemented in any of the display devices having the above-described configurations, and can be applied to all of Embodiments 1 to 7 and Examples 1 to 4. .

Various electronic devices can be manufactured by incorporating a display device obtained by implementing the present invention. Electronic devices include video cameras, digital cameras, goggle-type displays (
Head mounted display), navigation system, sound playback device (car audio, audio component, etc.), notebook personal computer, game machine, portable information terminal (mobile computer, mobile phone, portable game machine, electronic book, etc.), recording medium An image playback apparatus (specifically, Digital Versatile Disc (DV
D) etc.) and a device equipped with a display capable of displaying the image. Specific examples of these electronic devices are shown in FIGS.

FIG. 25A illustrates a television which includes a housing 2001, a support base 2002, a display portion 2003, a speaker portion 2004, a video input terminal 2005, and the like. The present invention can be applied to the display portion 2003. Note that all information display televisions such as a personal computer, a TV broadcast reception, and an advertisement display are included.

FIG. 25B illustrates a digital camera, which includes a main body 2101, a display portion 2102, and an image receiving portion 210.
3, an operation key 2104, an external connection port 2105, a shutter 2106, and the like. The present invention can be applied to the display portion 2102.

FIG. 25C illustrates a laptop personal computer which includes a main body 2201 and a housing 2202.
A display portion 2203, a keyboard 2204, an external connection port 2205, a pointing mouse 2206, and the like. The present invention can be applied to the display portion 2203.

FIG. 25D illustrates a mobile computer, which includes a main body 2301, a display portion 2302, a switch 2303, operation keys 2304, an infrared port 2305, and the like. The present invention provides the display unit 23.
02 can be applied.

FIG. 25E shows a portable image reproducing apparatus (specifically, a DVD reproducing apparatus) provided with a recording medium.
A main body 2401, a housing 2402, a display portion A 2403, a display portion B 2404, a recording medium (DVD or the like) reading portion 2405, operation keys 2406, a speaker portion 2407, and the like.
Although the display portion A 2403 mainly displays image information and the display portion B 2404 mainly displays character information, the present invention can be applied to the display portions A, B 2403, and 2404. In addition,
The image reproducing device provided with the recording medium includes a home game machine and the like.

FIG. 25F shows a game machine, which includes a main body 2501, a display portion 2505, and an operation switch 25.
04 etc. are included.

FIG. 25G illustrates a video camera, which includes a main body 2601, a display portion 2602, a housing 2603,
External connection port 2604, remote control receiving unit 2605, image receiving unit 2606, battery 260
7, a voice input unit 2608, operation keys 2609, an eyepiece unit 2610, and the like. The present invention can be applied to the display portion 2602.

FIG. 25H illustrates a mobile phone, which includes a main body 2701, a housing 2702, a display portion 2703, an audio input portion 2704, an audio output portion 2705, operation keys 2706, an external connection port 2707, an antenna 2708, and the like. The present invention can be applied to the display portion 2703.

FIG. 26 shows an audio player, which includes a main body 2801 and a full-panel 28 of a half mirror.
02, operation keys 2803, earphones 2804, and the like. Half mirror full face panel 280
A part of 2 is a display unit. The full-surface panel of the half mirror is almost a mirror when no display is performed on the display unit. The display device of the present invention can be applied to a display portion formed in part of the half mirror 2802.

In the example of the electronic device described above, a digital camera, a notebook personal computer, a game device, a video camera, a mobile phone, and the like can be freely carried and are used both outdoors and indoors. In such a usage pattern, the brightness of the surroundings is different between indoors and outdoors, so the optimal brightness (brightness that is easy to see) of the display screen differs between indoors and outdoors. there,
In an electronic device of such a usage pattern, a panel having a structure in which a substrate provided with red, green, and blue organic light-emitting elements and a substrate provided with white organic light-emitting elements are bonded to each other, and ambient brightness If a configuration is provided that changes the luminance of the white organic light-emitting element according to the ambient brightness detected by the optical sensor, along with the change in ambient brightness of the electronic device The brightness of the display screen can be adjusted.

As described above, the display device obtained by implementing the present invention may be used as a display unit of any electronic device. Note that a light-emitting device manufactured using any structure of Embodiment Modes 1 to 7 and Examples 1 to 4 may be used for the electronic device of this example.

100 First substrate 101 Second substrate 102 Display screen 103 FPC
104 FPC
105 First electrode 106 Layer containing organic compound 107 Second electrode 108 Second electrode 109 Layer containing organic compound 110 Second electrode 111 Second electrode 112 Layer containing organic compound 113 First electrode 114 First Two electrodes 115 Layer 116 containing organic compound First electrode 120 Organic light emitting device 121 Organic light emitting device 122 Organic light emitting device 123 Organic light emitting device 130 Peripheral drive circuit 131 Peripheral drive circuit 201 Red light emitting region 202 Green light emitting region 203 Blue light emitting region 204 white light emitting area 205 light emitting area 206 light emitting area 207 light emitting area 300 green light emitting area 301 red light emitting area 302 blue light emitting area 303 white light emitting area 304 light emitting area 305 light emitting area 306 light emitting area 307 light emitting area 400 first substrate 401 second Substrate 402 First electrode 403 containing organic compound Layer 404 second electrode 405 first electrode 406 layer containing organic compound 407 second electrode 408 organic light emitting element 409 organic light emitting element 410 first electrode 411 layer containing organic compound 412 second electrode 413 first Electrode 414 layer 415 containing organic compound second electrode 416 organic light emitting device 417 organic light emitting device 500 green light emitting region 501 red light emitting region 502 blue light emitting region 503 white light emitting region 504 light emitting region 505 light emitting region 506 light emitting region 507 light emitting region 508 Light emitting region 509 Light emitting region 600 First substrate 601 Second substrate 602 First electrode 603 Layer containing organic compound 604 Second electrode 605 First electrode 606 Layer containing organic compound 607 Second electrode 608 Organic light emitting Element 609 Organic light-emitting element 610 First electrode 611 Layer containing organic compound 612 Second Electrode 613 Organic light emitting element 614 Organic compound layer 615 Second electrode 616 Organic light emitting element 617 Organic light emitting element 700 Red light emitting area 701 Green light emitting area 702 Blue light emitting area 703 Yellow light emitting area 704 Magenta light emitting area 705 Cyan light emitting area 706 Light emitting area 707 Light emitting area 708 Light emitting area 709 Light emitting area 710 Light emitting area 711 Light emitting area 712 Light emitting area 713 Light emitting area 714 Light emitting area 715 Light emitting area 716 Light emitting area 717 Light emitting area 718 Light emitting area 719 Light emitting area 720 Light emitting area 800 First substrate 801 Second substrate 802 First electrode 803 Layer containing organic compound 804 Second electrode 805 First electrode 806 Layer containing organic compound 807 Second electrode 808 First electrode 809 Layer containing organic compound 810 Second Electrode 811 from organic Element 812 Organic light-emitting element 813 Organic light-emitting element 821 First electrode 822 Layer 823 containing organic compound Second electrode 824 First electrode 825 Layer containing organic compound 826 Second electrode 827 Organic light-emitting element 828 Organic light-emitting element 829 Organic light emitting device 900 Red light emitting region 901 Green light emitting region 902 Blue light emitting region 903 Part of green light emitting region 904 Blue light emitting region 905 Red light emitting region 906 Part of green light emitting region 907 Light emitting region 908 Light emitting region 909 Light emitting region 910 Light emitting region 911 Light-emitting region 912 Light-emitting region 913 Light-emitting region 914 Light-emitting region 915 Light-emitting region 1000 First substrate 1001 Second substrate 1002 First electrode 1003 Layer 1004 containing organic compound Second electrode 1005 First electrode 1006 containing organic compound Layer 1007 second electrode 1008 first Layer 1010 containing organic compound 1010 second electrode 1011 organic light emitting device 1012 organic light emitting device 1013 organic light emitting device 1014 first electrode 1015 layer 1016 containing organic compound second electrode 1017 first electrode 1018 organic compound Layer 1019 second electrode 1020 first electrode 1021 layer 1022 containing an organic compound second electrode 1023 first electrode 1024 layer 1025 containing an organic compound second electrode 1026 organic light emitting element 1027 organic light emitting element 1028 organic light emitting Element 1029 Organic light emitting element 1100 Blue dot 1101 Blue dot 1102 Blue dot 1103 Blue dot 1104 Blue dot 1200 Red light emitting area 1201 Green light emitting area 1202 Blue light emitting area 1203 White light emitting area 1204 White light emitting area 1205 White light emitting region 1206 Light emitting region 1207 Light emitting region 1208 Light emitting region 1300 First substrate 1301 Second substrate 1302 First electrode 1303 Layer 1304 containing organic compound Second electrode 1305 First electrode 1306 Layer 1307 containing organic compound Second electrode 1308 First electrode 1309 Layer 1310 containing organic compound Second electrode 1311 Organic light emitting element 1312 Organic light emitting element 1313 Organic light emitting element 1314 First electrode 1315 Layer 1316 containing organic compound Second electrode 1317 First First electrode 1318 Layer 1319 containing organic compound Second electrode 1320 First electrode 1321 Layer containing organic compound 1322 Second electrode 1323 Organic light emitting device 1324 Organic light emitting device 1325 Organic light emitting device 1400 Red light emitting region 1401 Green light emitting region 1402 Blue light emission Area 1403 Red light emitting area 1404 Green light emitting area 1405 Blue light emitting area 1406 Red light emitting area 1407 Green light emitting area 1408 Blue light emitting area 1410 Cyan light emitting area 1411 Magenta light emitting area 1412 Yellow light emitting area 1413 Light emitting area 1414 Light emitting area 1415 Light emitting area 1416 Light emitting area 1417 Light-emitting region 1418 Light-emitting region 1419 Light-emitting region 1420 Light-emitting region 1421 Light-emitting region 1500 First substrate 1501 Second substrate 1505 First electrode 1506 Organic compound layer 1507 First electrode 1508 Second electrode 1509 Organic compound layer 1510 First Electrode 1511 second electrode 1512 organic compound layer 1513 first electrode 1514 second electrode 1515 organic compound layer 1516 first electrode 1520 organic light emitting element 1521 organic light emitting element 152 The organic light emitting device 1523 the organic light emitting device 1530 third substrate 1601 first substrate 1602 insulating film 1603 protective film 1605 sealant 1606 second substrate 1607 filler 1608 insulator 1610W TFT
1611W Organic light emitting device 1612 Insulating film 1613 Protective film 1614 Leading wiring 1615 Leading wiring 1616 Connection terminal 1618 FPC
1619 Anisotropic Conductive Film 1620R TFT
1620G TFT
1620B TFT
1621R Organic light emitting element 1621G Organic light emitting element 1621B Organic light emitting element 1624 Leading wiring 1625 Leading wiring 1628 Insulator 1636 Connection terminal 1639 Anisotropic conductive film 1640 First electrode 1641 First electrode 1642 Protective film 1643 Protective film 1650 TFT
1651 TFT
2001 Housing 2002 Support stand 2003 Display unit 2004 Speaker unit 2005 Video input terminal 2101 Main body 2102 Display unit 2103 Image receiving unit 2104 Operation key 2105 External connection port 2106 Shutter 2201 Main body 2202 Housing 2203 Display unit 2204 Keyboard 2205 External connection port 2206 Pointing mouse 2301 Main body 2302 Display unit 2303 Switch 2304 Operation key 2305 Infrared port 2401 Main body 2402 Case 2403 Display unit A
2404 Display B
2405 Recording medium reading unit 2406 Operation key 2407 Speaker unit 2501 Main unit 2504 Operation switch 2505 Display unit 2601 Main unit 2602 Display unit 2603 Housing 2604 External connection port 2605 Remote control receiver 2606 Image receiving unit 2607 Battery 2609 Operation key 2610 Eyepiece unit 2701 Main unit 2702 Enclosure 2703 Display unit 2704 Audio input unit 2705 Audio output unit 2706 Operation key 2707 External connection port 2708 Antenna 2801 Main body 2802 Full panel 2803 Operation key 2804 Earphone 3000 Green light emission region 3001 Red light emission region 3002 Blue light emission region 3003 White light emission region 3004 Light emission Area 3005 Light emitting area 3100 Red light emitting area 3101 Green light emitting area 3102 Blue light emitting area 3103 Blue light emitting area 3104 Red Light emitting area 3105 Green light emitting area 3106 Light emitting area 3107 Light emitting area 3108 Light emitting area 4000 First substrate 4001 Second substrate 4002 Sealant 4003 Sealant 4004 First polarizing plate 4005 Second polarizing plate 4006 First λ / 4 Wave plate 4007 Second λ / 4 wave plate

Claims (5)

A first substrate having a first surface and a second surface facing each other ;
A second substrate having a third surface and a fourth surface facing each other ;
A third substrate;
First to third organic light emitting elements provided on the first surface;
A fourth organic light-emitting element provided on the third surface,
The first to the fourth organic light emitting device, respectively, a first electrode, a second electrode, and a layer containing an organic compound sandwiched between the second electrode and the first electrode Have
The emission color of the fourth organic light emitting element is white,
The first surface of the first substrate and the third substrate face each other with the first to third organic light emitting elements interposed therebetween,
Said third front surface of said first of said second surface of the substrate the second substrate, face each other across the fourth organic light emitting devices,
The first to third organic light emitting elements emit light in the direction of the second surface ,
The fourth organic light emitting element emits light to the fourth surface and both directions of the first substrate,
The light emitting device, wherein light emitting regions of the first to third organic light emitting elements overlap with light emitting regions of the fourth organic light emitting element. A first substrate having a first surface and a second surface facing each other ;
A second substrate having a third surface and a fourth surface facing each other ;
A third substrate;
First to third organic light emitting elements provided on the first surface;
A fourth organic light-emitting element provided on the third surface,
The first to the fourth organic light emitting device, respectively, a first electrode, a second electrode, and a layer containing an organic compound sandwiched between the second electrode and the first electrode Have
The emission color of the fourth organic light emitting element is white,
The first surface of the first substrate and the fourth surface of the second substrate are opposed to each other with the first to third organic light emitting elements interposed therebetween,
The third surface of the second substrate and the third substrate are opposed to each other with the fourth organic light emitting element interposed therebetween,
The first to the third organic light emitting element emits light to the second surface and both of the second board,
The fourth organic light emitting element emits light in both directions of the fourth surface and the third substrate,
The light emitting device, wherein light emitting regions of the first to third organic light emitting elements overlap with light emitting regions of the fourth organic light emitting element. In claim 1 or claim 2 ,
It said first substrate, a plastic substrate or a glass substrate der is, the second substrate, the light emitting device which is a plastic substrate or a glass substrate. In any one of Claim 1 thru | or 3 ,
A light-emitting device having a transistor electrically connected to the first organic light-emitting element on the first surface. In any one of Claims 1 thru | or 4,
The light emitting device according to any one of claims 1 to 3, wherein the first to third organic light emitting elements are not white and have different colors.

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