JP2005071693A - Light emitting device, its manufacturing method, and three-dimensional display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a full color display having a high resolution, high a numerical aperture, and high reliability, and a display capable of displaying a three-dimensional picture. <P>SOLUTION: This light emitting device is constituted such that, by overlapping at least two sheets of light emitting panels capable of emitting light from both sides, preferably three sheets of unit color light emitting panels 101, 102 and 103 of R, G and B, one full color display picture is obtained. Furthermore, by overlapping more than three sheets, for example, 3×n (n is a natural number) sheets of unit color light emitting panels having different colors, the light emitting element is arranged three-dimensionally and the display itself is made three-dimensional, and an observer can view a three-dimensional image by perceiving it. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an organic light emitting device having an anode, a cathode, and a layer containing an organic compound that can emit light by applying an electric field (hereinafter referred to as “electroluminescent layer”), and a light emitting device using the same About. In particular, the present invention relates to an organic light-emitting element that emits white light, and a light-emitting device using the organic light-emitting element capable of full-color display.

  Note that a light-emitting device in this specification refers to an image display device, a light-emitting device, or a light source (including a lighting device). Also, a module in which a connector such as an FPC (Flexible printed circuit) or TAB (Tape Automated Bonding) tape or TCP (Tape Carrier Package) is attached to the light emitting device, or a module in which a printed wiring board is provided at the end of the TAB tape or TCP In addition, a module in which an IC (integrated circuit) is directly mounted on a light emitting element by a COG (Chip On Glass) method is also included in the light emitting device.

  The electroluminescent element comprises an electroluminescent layer sandwiched between a pair of electrodes (anode and cathode), and the light emission mechanism is such that holes injected from the anode when an electric field is applied between both electrodes, Electrons injected from the cathode recombine in the electroluminescent layer to recombine at the emission center in the electroluminescent layer to form molecular excitons, and release energy when the molecular excitons return to the ground state. And is said to emit light.

  A low molecular material or a high molecular material can be used for the electroluminescent layer in this electroluminescent element, and the film formation method includes vapor deposition (including vacuum vapor deposition), spin coating, ink jet, Examples include a dip method and an electric field polymerization method.

When considering creating a full-color flat panel display using red, green, and blue emission colors, the film deposition accuracy is not so high. An insulator called a bank or a barrier is provided. Patent Document 1 is an example in which a barrier is provided between pixels.

  Further, Patent Document 2 describes a multicolor electroluminescent display device that displays a multicolor image by stacking a plurality of electroluminescent devices having different emission colors in the same stacking order so that the positions of the stripes in parallel are shifted. is there.

In addition, full-color flat panel displays have been prototyped using color filters and color conversion filters. When such a filter is used, since light emission is cut by the filter, there is a possibility that the luminance is lowered. Further, high-quality materials are required because they are easily dependent on white light-emitting materials and blue light-emitting materials. Patent Document 3 is an example of full color using a color filter.

Further, in Patent Document 4, a blue or green light emitting part formed from an organic EL element and a red light emitting part composed of a light emitting diode (LED) provided apart from the organic EL element are used for the progress of light. There is a description of a multicolor display device arranged so as not to overlap in the direction.
Japanese Patent Application Laid-Open No. 5-258859 JP-A-6-68777 Japanese Patent Laid-Open No. 10-177895 JP-A-7-199824

  As a full-color flat panel display using red, green, and blue emission colors, demands for high definition, high aperture ratio, and high reliability are increasing. Such a requirement is a major issue in the progress of miniaturization of each display pixel pitch accompanying the high definition (increase in the number of pixels) and miniaturization of the light emitting device. At the same time, demands for improved productivity and lower costs are increasing.

In addition, a display with a deep display, and a display capable of displaying a stereoscopic image are provided.

  The present invention is characterized by a light-emitting device capable of obtaining one full-color display image by stacking at least two light-emitting panels that can emit light from both sides, preferably three R, G, and B single-color light-emitting panels. .

  Specifically, a panel in which a blue light-emitting element is provided as the first panel on the outermost surface when viewed from the viewer side and is sealed with a light-transmitting substrate or film is used. In addition, a panel in which a red light-emitting element is provided as the second panel and is sealed with a light-transmitting substrate or film is used. In addition, a panel provided with a green light-emitting element and sealed with a light-transmitting substrate or film is used as the third panel. That is, the light emitting elements having different emission colors are sealed. These three panels are bonded with an adhesive so as to form one pixel in which red pixels (red light emitting regions), blue pixels (blue light emitting regions), and green pixels (green light emitting regions) are regularly arranged as viewed from the viewer side. . In these three panels, the anode and cathode of the light emitting element are made of a transparent or translucent conductive material, light is emitted from both sides of each panel, and the background is seen through.

  When coating for full color display on a single panel, the optimal film thickness (light emitting layer, electron transport layer, electron injection layer, hole transport layer, hole injection layer, etc.) for each light emitting color in the light emitting element Because it is different, it is difficult to adjust the film thickness so that three types of light emission can be obtained in a balanced manner. However, the present invention has excellent characteristics such as light emission efficiency and luminance simply by setting the optimal film thickness for one light emission color for each panel. Panels can be provided. In addition, the substrate on the outer surface side is a glass substrate (2 sheets) and the other substrate (4 sheets) is a film substrate, so that stress relaxation at the time of bonding is performed on the middle panel sandwiched between the panels. In particular, the middle panel is sealed with a film substrate (2 sheets), but as a result, the outer panel is sealed with a film substrate (2 sheets) and a glass substrate (2 sheets). , Improve reliability.

  In addition, in the light emitting element, the optimum power supply voltage differs depending on each emission color. However, since the present invention only requires different power supply voltages for each panel, a simple panel configuration can be obtained. In addition, since the human eye is differently identified in the external environment (sunlight, surrounding scenery), for example, when it is dark and bright, the degree of color may change depending on the external environment even if the brightness is the same. is there. Even in such a case, the present invention is effective, and the voltage applied to each panel (R, G, B) can be easily adjusted and the brightness can be changed. It can be easily adjusted as appropriate.

  In order to obtain a high-definition display, it is preferable to use an active matrix substrate in which light-emitting elements connected to TFTs are arranged in a matrix. In addition, since it is possible to design a pixel so that a gate wiring and a source wiring overlap in design, a light-emitting device with a high aperture ratio can be obtained. Conventionally, it has been necessary to form a power supply wiring for R, a power supply wiring for G, a power supply wiring for B, etc., and TFTs for three colors on the same substrate with a single light emitting panel. It was difficult to ensure the aperture ratio.

  In addition, the number of light emitting elements (or TFTs) built in one panel is reduced to one third, and the amount of heat generated per sheet is reduced, so that the reliability is improved. Further, when the driving circuit is formed on the same substrate, it is only required to be one third, and the frame can be narrowed.

  In addition, all three panels have the same pixel design, and a light-emitting panel that differs only in emission color, for example, a light-emitting panel that differs only in the material of a layer containing an organic compound, is prepared and bonded by shifting one pixel electrode at the time of bonding. Thus, design cost and manufacturing cost can be reduced.

  In addition, the three panels can have different pixel designs, and a full-color display device that can obtain a high aperture ratio can be realized.

  It is also possible to vary the configuration of the three panels. For example, among the three panels, only the third panel viewed from the viewer side may be a bottom emission structure light emission panel or a top emission structure light emission panel. However, in the case of using a light emission panel having a bottom emission structure or a panel having a top emission structure, the light emission direction is set to be an observer side.

  Further, although the light emitting panels are stacked in the order of B, R, and G as viewed from the observer side in the order of low visibility for humans, the order is not particularly limited.

  Even when the three panels are stacked, the thickness of each light-emitting panel is as thin as about 2 mm, so that the thickness of the entire light-emitting device can be reduced.

  In addition, in order to keep the total thickness of the light emitting device thin, two types of light emission colors of R, G, and B are configured by one panel, and the remaining one type of single color panel is overlapped with a total of two. Full color display may be obtained with this panel. Since only two panels are bonded, the bonding becomes easy. In addition, when two types of light emission colors are configured by one panel, two light emitting elements having different light emission colors are arranged at intervals in one pixel and provided on the other panel to be overlapped. It arrange | positions so that one light emitting element may come between.

  Moreover, in the said patent document 4, since it is a display apparatus which provided LED and organic EL element which were provided in the printed circuit board apart, it has the complicated structure which provided the optical fiber used as the transmission path of light between It has become. Moreover, since the LED lamp is large in size, it is difficult to perform high-definition display. In addition, a line for manufacturing LED lamps, a line for manufacturing organic EL elements, and a dedicated manufacturing apparatus for combining optical fibers must be prepared separately, which increases manufacturing costs. On the other hand, the present invention is greatly different from the above-mentioned Patent Document 4, and only a thin organic EL element is used, and each can perform high-definition display. be able to. In addition, the light-emitting device of the present invention can produce a plurality of panels having different emission colors by using a line for manufacturing an organic EL element.

  In the light emitting device of the present invention, the screen display driving method 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. Typically, a line sequential driving method is used, and a time-division gray scale driving method or an area gray scale driving method may be used as appropriate. The video signal input to the source line of the light-emitting device may be an analog signal or a digital signal, and a drive circuit or the like may be designed in accordance with the video signal as appropriate.

  In addition, since the pixel portion is configured by three panels, variation between adjacent portions can be reduced. In the case of full color display on one panel, if the TFT provided in one pixel and the peripheral TFT characteristics are defective, all the RGB pixels in one place become defective and become conspicuous. In the present invention, since the adjacent pixel TFTs are provided on different substrates, the possibility that the defective portions are the same on the three substrates is low and is not noticeable.

  Further, one light emission of the double-sided light emitting panel on the observer side reaches the observer, and the other light emission is absorbed by the lower panel. It is not necessary to use a circularly polarizing plate. Further, by providing a reflective layer in the lower panel, the amount of light emitted from the light emitting element provided in the upper layer may be increased.

  Further, not only polysilicon TFTs but also amorphous silicon TFTs can be used as switching elements of light emitting elements provided on the active matrix substrate. When an amorphous silicon TFT is used, the area occupied by the element increases. However, in the present invention, since the RGB light emitting elements are formed on three substrates, the switching elements of the light emitting elements are overlapped. The aperture ratio can be improved.

Moreover, it is good also as a light-emitting device which added a white panel in addition to three RGB panels, and piled up four panels.

The configuration of the invention disclosed in this specification is as follows.
A light-emitting device for full-color display in which three types of light-emitting elements that emit red, green, and blue are combined to form one pixel,
The light-emitting element includes a first electrode, a layer containing an organic compound, and a second electrode,
A light-emitting device in which a plurality of substrates on which light-emitting elements having different emission colors are formed are bonded together.

In addition, as shown in FIG.
A light-emitting device for full-color display in which three types of light-emitting elements that emit red, green, and blue are combined to form one pixel,
Of the three types of light-emitting elements, the first substrate provided with two types of light-emitting elements and the second substrate provided with the remaining one type of light-emitting elements are stacked to perform full-color display. It is a light-emitting device.

  In the above structure, one pixel display is achieved by two types of light emission that have passed through the first substrate and the second substrate and one type of light emission of a light emitting element provided on the second substrate. It is said. In the above structure, the light-emitting element provided on the second substrate includes a light-transmitting first electrode, a layer containing an organic compound, and a light-transmitting second electrode. It is characterized by having.

In addition, as shown in FIG.
A light-emitting device for full-color display in which three types of light-emitting elements that emit red, green, and blue are combined to form one pixel,
The light emitting areas of the three types of light emitting elements do not overlap when viewed from the viewer side.
A first substrate in which light emitting elements emitting green light are provided in a matrix;
A second substrate in which light emitting elements emitting blue light are provided in a matrix;
A light-emitting device which performs full-color display by bonding a light-emitting element that emits red light to a third substrate provided in a matrix.

  In the above structure, at least two of the three types of light-emitting elements include a light-transmitting first electrode, a layer containing an organic compound, and a light-transmitting second electrode. It is characterized by having.

  In each of the above structures, the first electrode and the second electrode are a cathode or an anode of a light-emitting element having a layer containing an organic compound as a light-emitting layer. In each of the above structures, a TFT is connected to the first electrode or the second electrode, and one or both of the TFT source wiring and the TFT gate wiring overlap each other through the substrate on different substrates. It is characterized by having.

  In each of the above structures, the first electrode or the second electrode is a transparent conductive film or a metal thin film that transmits light.

  Furthermore, according to the present invention, three or more, for example, 3 × n (n is a natural number) sheets of monochromatic light-emitting panels having different emission colors can be stacked to form a display with a deep display. In addition, a three-dimensional image can be formed by stacking an infinite number of monochromatic light emitting panels having different emission colors. Conventionally, images having parallax for right eye and left eye are displayed using two imaging devices, and stereoscopic images are displayed using special glasses or a special screen. To display a stereoscopic image. However, in order to obtain a stereoscopic image, it is necessary to prepare display data for the stereoscopic image and divide and display the display data for each panel.

  In addition, when an infinite number of panels are stacked, a material that absorbs light emission (for example, CuPc absorbs red light emission) is avoided as much as possible depending on the organic compound used for the light-emitting element, and a material that does not absorb light emission of the issuing element is used for the light-emitting element Is preferred.

  In order to obtain a display with a deep display, the total thickness of the light-emitting device is intentionally increased by overlapping each panel that is overlapped with a certain interval or via a film.

  In addition, by utilizing the fact that the transmittance and the amount of light emission differ depending on the number of stacked panels, a bright display part is displayed on the front panel when viewed from the observer side, and a dark display part is displayed on the back panel. Form an image. That is, even if the luminance emitted from the front panel is the same as the luminance emitted from the back panel, the display on the back panel is darker than the display on the front panel depending on the number of panels sandwiched between them. Can show. Furthermore, a light-shielding film (for example, a dyed polyester film having a thickness of 25 μm to 350 μm that can adjust the transmittance and color tone between the panels so that the gradation of the display on the front panel and the display on the back panel is formed remarkably. ) May be adjusted as appropriate. For example, in order to obtain a full gradation display of 4 gradations and 64 colors, a light emitting device in which 12 panels are stacked, that is, a light emission that is an aggregate consisting of a total of 4 sets of 3 single color RGB panels. In order to adjust the gradation, a total of three light-shielding films may be provided, one for each group. In this case, the monochromatic panel may be a simple one that cannot display gradation, and the gradation of each panel is created by the number of panels and the number of light shielding films stacked from the observer side.

In addition, other configurations of the invention include
A first substrate on which light emitting elements for emitting a first emission color are provided in a matrix;
A second substrate in which light-emitting elements emitting a second emission color are provided in a matrix;
Stacking a plurality of panel groups each formed by stacking light emitting elements emitting a third emission color with a third substrate provided in a matrix,
A three-dimensional display device characterized in that three-dimensionally arranged light emitting elements are lit to make the display itself three-dimensional.

In the above structure, the first emission color, the second emission color, and the third emission color are any one of red, orange, green, yellow, blue, and white. In the above structure, the light-emitting element includes a light-transmitting first electrode, a layer containing an organic compound, and a light-transmitting second electrode.

  The three-dimensional display device of the present invention stacks light emitting elements, makes the display itself three-dimensional, and makes the viewer recognize a three-dimensional image by visually recognizing it. It is not necessary to use special glasses for stereoscopic images such as optical films. Further, since the display itself is a three-dimensional image, the appropriate viewing distance is wide. In addition, since the images in both eyes are not synthesized in the brain as in the past, there is little fatigue.

  In addition to a single color light emitting panel, even when two or more full color light emitting panels capable of emitting light from both sides are stacked, a display having a deep display or a stereoscopic image can be formed.

  An optical lens or an optical film may be inserted between the panel groups.

  Further, in this specification, transparent to visible light means that the visible light transmittance is 80 to 100%, and translucent to visible light is a visible light transmittance of 50 to 80%. It means that.

Note that the light-emitting element (EL element) includes a layer containing an organic compound (hereinafter referred to as an EL layer) from which luminescence (Electro Luminescence) generated by applying an electric field is obtained, an anode, and a cathode. Luminescence in an organic compound includes light emission (fluorescence) when returning from a singlet excited state to a ground state and light emission (phosphorescence) when returning from a triplet excited state to a ground state, which are produced according to the present invention. The light emitting device can be applied to either light emission. The layer including the organic compound layer (EL layer) may also include an inorganic material such as silicon.

A light-emitting element using a layer containing an organic compound as a light-emitting layer has been difficult to develop materials and elements that have long-term reliability of all of R, G, and B and good color purity on the same substrate. Has made a full-color display device that combines long-term reliability and good color purity by making three types of light-emitting elements on a plurality of substrates and stacking each of them.

  In addition, the present invention eliminates the need to form three types of light emitting elements R, G, and B on a single substrate, simplifies device design, and provides wiring and switching elements (TFTs) between a plurality of substrates. Therefore, the aperture ratio can be improved.

  In addition, since the present invention does not require separate coating for each RGB even in the case of a full-color display device, it is possible to use a film formation method in which the film formation accuracy of a layer containing an organic compound is not so high, and for mass production. Are suitable. For example, the film may be formed by an ink jet method. Film formation by the inkjet method is easy to spread because it is a liquid, but in the present invention, since the interval between adjacent pixels in one panel is large, the film formation position margin is wide. Also in vapor deposition, there is a limit in the opening distance of the mask due to the wraparound of the vapor deposition material and the mask processing accuracy, and it has been difficult to coat each RGB with a fine pitch.

Further, in the present invention, since a monochromatic light emitting element may be manufactured over one substrate, the time from formation of a layer containing an organic compound to sealing can be shortened. The shorter the time from the formation of the layer containing the organic compound to the sealing, the more the impurities (mainly moisture) can be prevented from mixing, and the reliability is improved. When coating a single substrate for each RGB by vapor deposition, in addition to the vapor deposition time of the R, G, B EL material film, the alignment time of the R, G, B masks is further added, resulting in a long time. Therefore, the process has a high possibility that impurities are mixed.

  Embodiments of the present invention will be described below.

(Embodiment 1)
FIG. 1A is a perspective view showing an example of the present invention, and FIG. 1B is an exploded perspective view for easy understanding.

A panel in which blue light-emitting elements are provided in a matrix as the first panel 101 on the outermost surface when viewed from the observer side, one substrate is sealed with glass and the other substrate is sealed with plastic. Further, as the second panel 102, a panel in which red light emitting elements are provided in a matrix and sealed between a pair of substrates made of plastic is used. Further, as the third panel 103, a panel in which green light-emitting elements are provided in a matrix, one substrate is sealed with plastic, and the other substrate is sealed with glass.

  These three panels are stacked so as not to overlap each other in the direction of light emission, and a perspective view thereof is shown in FIG. Specifically, the three panels are fixed with an adhesive or the like so that red pixels, blue pixels, and green pixels are aligned when viewed from the viewer side. FIG. 2A shows an example of a pixel configuration viewed from the observer side.

  The present invention is a light emitting device for full color display in which three types of light emitting elements that emit red, green, and blue are combined to form one pixel, but it is not built on the same substrate as in the prior art, but for each light emitting color. Separately, light emitting elements are separately formed on a plurality of substrates.

  FIG. 2B shows a pixel configuration in the first panel as viewed from the observer side. The wiring 112B and the wiring 111B are gate wirings, source wirings, power supply lines, or the like, and an element circuit 113 including a TFT or the like is also provided. Since the first panel has only the blue light emitting region 110B, the same element circuit and wiring as the single color light emitting panel may be provided. In addition, the interval between the adjacent light emitting regions in the first panel is two, and the film forming margin is wide.

FIG. 2C illustrates a pixel structure in the second panel. Also in the second panel, the pixel configuration such as wiring and element circuit is the same, but the red light emitting region 110R is shifted so as not to overlap the blue light emitting region 110B of the first panel when they are overlapped. In addition, the wiring 121R is shifted so as not to overlap the blue light emitting region 110B of the first panel. As in the first panel, the wiring 112R and the wiring 121R are gate wirings, source wirings, power supply lines, or the like, and an element circuit 113R is also provided. Further, the wiring 121R is overlapped so as to be disposed between the blue light emitting region 110B and the red light emitting region 110R. However, the aperture ratio is maintained so that the wiring 112R overlaps with the wiring 112B and the element circuit 113R overlaps with the element circuit 113B.

FIG. 2D illustrates a pixel structure in the third panel. Also in the third panel, the pixel configuration such as wiring and element circuit is the same, but when overlaid, the green light emitting area 110G becomes the blue light emitting area 110B of the first panel and the red light emitting area 110R of the second panel. They are shifted so that they do not overlap. In addition, the wiring 131G is shifted so as not to overlap the red light emitting region 110R of the second panel. As in the other panels, the wiring 112G and the wiring 131G are gate wirings, source wirings, power supply lines, or the like, and an element circuit 113G is also provided.

Thus, by making the panel into three panels separately, it is possible to secure a high aperture ratio while reducing the number of element circuits and wirings formed per sheet and providing a margin for pixel design. In addition, by making the three panels separately, the variation between adjacent elements in the circuit becomes inconspicuous.

  Further, in manufacturing one panel, there is a distance between adjacent light emitting regions, so that the margin of the film formation pattern is wide. In addition, it is possible to perform lamination and film thickness setting of a layer containing an organic compound that is optimal for the emission color for each panel. In addition, as long as it is transparent, the cathode material (or anode material) formed on the layer containing the organic compound can be selected as the optimum material for the emission color for each panel, and the film thickness can be freely set.

  Note that only the frame portion may be bonded and fixed with the three panels non-contacting. In addition, as a whole of the light emitting device, three panels are stacked and sealed so that the front substrate and the back substrate are glass substrates. Since the glass substrate is easily broken, it is preferable to use a plastic substrate for the panel sandwiched therebetween. In these three panels, the anode and cathode of the light emitting element are made of a transparent or translucent conductive material, light is emitted from both sides of each panel, and the background is seen through.

  Here, the display image 104 will be described. The display image 104 is a composite of the display of three panels. Display data is input from the FPC 105 to the first panel 101 on the outermost surface when viewed from the observer side, and a blue image 104B is displayed. The second panel 102 receives display data from the FPC 106 and displays a red image 104R, and the third panel 103 receives display data from the FPC 107 and displays a green image 104G.

In the display of the third panel 103, since the light passes through the first panel and the second panel before reaching the observer's eyes, the brightness of the green image 104G is slightly reduced. In green, it is easy to secure a higher luminance than other colors, and by increasing the luminance higher than that of the first panel and the second panel, the color purity can be balanced and a good display image 104 can be obtained. it can. Similarly, it is preferable to balance the color purity of the second panel by making the luminance higher than that of the first panel. In the present invention, the color purity of the display image 104 can be easily balanced by appropriately changing the signals input to the FPCs 105 to 107.

  Further, in the light emission progression direction of the third panel 103, the region through which the light emission from the green light emitting region 110G passes (the region in the first panel and the second panel) is a layer that is as transparent as possible and has little scattering. It is preferable. Similarly, in the light emission progression direction of the second panel 102, the region through which light emission from the red light emission region 110R passes (the first panel) is preferably a laminate that is as transparent as possible and has little scattering.

  The FPCs 106 and 107 can be firmly fixed because the panels are fixed and sandwiched between the substrates after the FPC is first attached to the terminal electrodes of the substrate.

Although not shown here, a drive circuit using a CMOS circuit composed of TFTs may be formed, and the drive circuit can be separately formed on each substrate, so that the area occupied by the drive circuit can be reduced. .

  In addition, using three panels having the same pixel structure as shown in FIG. 2 (however, layers of layers containing organic compounds are different) is suitable for mass production. For example, all substrates on which TFTs are arranged in a matrix can be made common.

(Embodiment 2)
In the first embodiment, an example in which three panels having the same pixel structure are stacked is shown, but here, an example of a light-emitting device capable of full-color display by stacking two panels having different pixel structures is shown in FIGS. Shown in

FIG. 3A is a perspective view showing an example of the present invention, and FIG. 3B is an exploded perspective view for easy understanding.

A panel in which blue light-emitting elements are provided in a matrix as the first panel 201 on the outermost surface when viewed from the observer side, one substrate on which TFTs are provided is sealed with glass, and the other substrate is sealed with plastic Is used. As the second panel 202, a panel in which red light-emitting elements and green light-emitting elements are provided in a matrix and sealed between a pair of substrates made of glass is used.

These two panels are stacked so that they do not overlap each other in the light emission progression direction, and a perspective view thereof is shown in FIG.

In the first panel 201 on the outermost surface, the anode and the cathode of the light emitting element are made of a transparent or translucent conductive material, light is emitted from both sides of the panel, and the background is seen through. The second panel 202 has a cathode made of a metal film and emits light only in one direction of the panel.

FIG. 4A illustrates an example of a pixel configuration viewed from the observer side. As shown in FIG. 4A, a light emitting device for full color display in which three types of light emitting elements emitting red, green, and blue are combined to form one pixel.

  FIG. 4B shows a pixel configuration in the first panel as viewed from the observer side. The wiring 212 and the wiring 211 are a gate wiring, a source wiring, a power supply line, or the like, and an element circuit 213B including a TFT or the like is also provided. Since the first panel has only the blue light emitting region 210B, the same element circuit and wiring as the single color light emitting panel may be provided. In addition, the interval between the adjacent light emitting regions in the first panel is two, and the film forming margin is wide.

FIG. 2C illustrates a pixel structure in the second panel. In the second panel, the pixel configuration is different, the drive circuit 208 is also provided, and the size of the light emitting area is also different. The red light emitting region 220R and the green light emitting region 220G are shifted so as not to overlap the blue light emitting region 210B of the first panel when they are stacked. The wirings 211, 212, and 215 are gate wirings, source wirings, power supply lines, or the like, and element circuits 213G and 214 are provided. The element circuit 213G maintains the aperture ratio so as to overlap with the element circuit 213B.

  Here, the display image 204 will be described. The display image 204 is a composite of the display of two panels. Display data is input from the FPC 205 to the first panel 201 on the outermost surface when viewed from the observer side, and a blue image 204B is displayed. The second panel 202 receives display data from the FPC 206 and displays a red image 204R and a green image 204G.

  The light-emitting device illustrated in FIG. 3 is an example in which an FPC is pasted after bonding substrates (two sheets) provided with TFTs in a matrix. Further, the bonding process is reduced as compared with the first embodiment.

  Also, there are several possible combinations of configurations in which two panels having different pixel structures are stacked. Specifically, the first panel 201 may be a double-sided light emitting device, and the second panel 202 may be a bottom emission type light emitting device, a top emission type light emitting device, or a double sided light emitting device.

  FIG. 5 shows an example in which the first panel is a double-sided light emitting device and the second panel is a bottom emission type light emitting device.

In FIG. 5, an amorphous silicon TFT 510 and a blue light emitting element 511 connected to the TFT 510 via a connection electrode 508 are provided on a first substrate 501, and the blue light emission is emitted from the second substrate. There are both light emission that passes through 506 and light emission that passes through the first substrate 501. The light emitted through the first substrate 501 further passes through the third substrate 520 and is reflected by the cathode 522 (cathode of the light emitting elements 521R and 521G) made of a metal film, and the third substrate, the second substrate, Further, the extraction efficiency of blue light emission is increased by passing the first substrate.

  In addition, in order to reflect blue light emission that passes through the first substrate 501, a reflective electrode may be formed simultaneously using the same material as the gate wiring and the source wiring of the TFTs 530R and 530G.

In FIG. 5, 502 is an insulating film, 503 and 532 are protective films, 504 is a partition, 507 is a filler, 513 is an adhesive, and a transparent material is used. Reference numeral 509 denotes one electrode of the light emitting element 511, and the other electrode is a transparent conductive film 512. Reference numerals 505 and 525 are sealing materials, 514, 515, 534 and 535 are routing wirings, 516 and 536 are connection terminals, 518 and 538 are FPCs, 519 and 529 are anisotropic conductive materials, 526 is a sealing substrate, and 527 Are voids and 528 is a desiccant.

  Reference numeral 523 denotes an n-channel TFT and reference numeral 524 denotes a p-channel TFT, which forms a CMOS circuit. A driving circuit is configured using this CMOS circuit.

(Embodiment 3)
Here, FIG. 6 shows an example in which a three-dimensional image is formed by stacking innumerable monochromatic light emitting panels having different emission colors.

  A first substrate in which light emitting elements that emit light of the first emission color are provided in a matrix, a second substrate in which light emitting elements that emit light of the second emission color are provided in a matrix, and a third light emission A plurality of panel groups each formed by overlapping light emitting elements emitting light in color with a third substrate provided in a matrix are stacked, and the three-dimensionally arranged light emitting elements are turned on to make the display itself three-dimensional.

FIG. 6A shows a perspective view of a light emitting device on which a stereoscopic display image 602 is displayed, and only a part thereof is shown. FIG. 6B shows a simplified cross-sectional view.

  A first panel group 610 composed of three panels including the first panel 601 as viewed from the observer side, a second panel group 611 composed of three panels, and a third panel group 612 composed of three panels. A fourth panel group 613 composed of three panels and an nth panel group 614 composed of three panels are stacked. Further, optical films 603a to 603d for adjusting the gradation by adjusting the transmittance are provided between the panel groups.

  Here, the stereoscopic display image 602 will be described. The stereoscopic display image 602 is obtained by synthesizing the display of a plurality of panel groups. As an example, a display using up to the fourth panel group (pixels in 8 rows and 8 columns) will be described with reference to FIG. One pixel is composed of three types of light emitting elements respectively formed on three panels. The image shown in FIG. 7B is displayed on the first panel group 610 on the outermost surface when viewed from the observer side, and the image shown in FIG. 7C is displayed on the second panel group 611. The image shown in FIG. 7D is displayed on the third panel group 612, and the image shown in FIG. 7E is displayed on the fourth panel group 613.

An optical film for adjusting the gradation is provided between each panel group, so even if the light emitting elements of each panel emit light with the same brightness, the darker the display is, the farther away from the viewer side. It becomes.

Therefore, the display viewed from the observer (FIG. 7A) looks three-dimensional.

  In this way, the light emitting elements are stacked, the display itself is made into a three-dimensional image, and the viewer can recognize the three-dimensional image by visually recognizing it.

FIG. 8 shows an example of a cross-sectional view of the first panel group and the optical film 804. For the sake of simplification, the second panel group and thereafter are not shown.

In FIG. 8, 801 is a first substrate, 806 is a second substrate, 802 is a third substrate, 803 is a fourth substrate, 808 is a partition wall, 807, 813 and 817 are fillers, and are transparent materials. Is used.

Reference numerals 805, 820, and 821 denote sealing materials, 814 and 815 denote routing wirings, 816 denotes connection terminals, 818B, 818R, and 818G denote FPCs, and 819 denotes an anisotropic conductive material.

  The light-emitting element 811G is sealed with a fourth substrate 803 and a third substrate 802. Further, the gap between the two substrates is secured by a gap material included in the sealing material 821. Note that reference numeral 810G denotes a TFT which is electrically connected to the light emitting element 811G.

  The light-emitting element 811R is sealed with the third substrate 802 and the first substrate 801. Further, the gap between the two substrates is secured by a gap material included in the sealing material 820. Note that reference numeral 810R denotes a TFT which is electrically connected to the light emitting element 811R.

  In addition, the light-emitting element 811B is sealed with the second substrate 806 and the first substrate 801. Further, the gap between the two substrates is secured by a gap material included in the seal material 805. One electrode of the light-emitting element 811B is a transparent conductive film 812. Note that reference numeral 810B denotes a TFT which is electrically connected to the light emitting element 811B.

The light emitting elements 811B, 811R, and 811G are formed at different positions (substrates), but all light emitted from the light emitting elements 811B, 811R, and 811G passes through the second substrate 806 and reaches the observer. A pixel portion can be formed using the light emitted from these three light emitting elements, and full color display can be performed. Note that there is no particular limitation on the structure of the panel as long as light emitted from the light-emitting elements 811B, 811R, and 811G reaches the observer through the second substrate 806.

  By stacking a plurality of panel groups and optical films shown in FIG. 8, light emitting elements are three-dimensionally arranged to complete a three-dimensional display device.

  The present invention having the above-described configuration will be described in more detail with the following examples.

  In this embodiment, a part of a cross-sectional structure of a pixel portion manufactured over one substrate is shown in FIG.

In FIG. 9A, 300 is a first substrate, 301a and 301b are insulating layers, 302 is a TFT, 308 is a first electrode, 309 is an insulator, 310 is an EL layer, 311 is a second electrode, 312 Is a transparent protective layer, 313 is a second sealing material, and 314 is a second substrate.

A TFT 302 (p-channel TFT) provided over the first substrate 300 is an element that controls a current flowing through the EL layer 310 that emits light, and a drain region (or a source region) 304. Reference numeral 306 denotes a drain electrode (or source electrode) that connects the first electrode and the drain region (or source region). In addition, a wiring 307 such as a power supply line or a source wiring is formed at the same time in the same process as the drain electrode 306. Here, an example is shown in which the first electrode and the drain electrode are formed separately, but they may be the same. An insulating layer 301a serving as a base insulating film (here, a nitride insulating film as a lower layer and an oxide insulating film as an upper layer) is formed over the first substrate 300. Between the gate electrode 305 and the active layer, A gate insulating film is provided. Reference numeral 301b denotes an interlayer insulating film made of an organic material or an inorganic material. Although not shown here, one or more other TFTs (n-channel TFTs or p-channel TFTs) are provided in one pixel. Although a TFT having one channel formation region 303 is shown here, the TFT is not particularly limited and may be a TFT having a plurality of channels.

Reference numeral 308 denotes a first electrode, that is, an anode (or a cathode) of the light emitting element. In the case where the first electrode 308 made of a transparent conductive film is used as shown in FIG. 9B, light can be emitted to both the upper surface and the lower surface. As the transparent conductive film, ITO (indium tin oxide alloy), indium zinc oxide alloy (In ₂ O ₃ —ZnO) ITSO, zinc oxide (ZnO), or the like may be used.

  In addition, an insulator 309 (referred to as a bank, a partition, a barrier, a bank, or the like) is provided to cover an end portion (and the wiring 307) of the first electrode 308. As the insulator 309, an inorganic material (silicon oxide, silicon nitride, silicon oxynitride, or the like), a photosensitive or non-photosensitive organic material (polyimide, acrylic, polyamide, polyimide amide, resist, or benzocyclobutene), or a material thereof For example, a photosensitive organic resin covered with a silicon nitride film is used. For example, when positive photosensitive acrylic is used as the organic resin material, it is preferable that only the upper end portion of the insulator has a curved surface having a curvature radius. As the insulator, either a negative type that becomes insoluble in an etchant by photosensitive light or a positive type that becomes soluble in an etchant by light can be used.

The layer 310 containing an organic compound is formed by an evaporation method or a coating method (such as an ink jet method). Note that in order to improve reliability, it is preferable to perform deaeration by performing vacuum heating before the formation of the layer 310 containing an organic compound. For example, in the case of using a vapor deposition method, the vapor deposition is performed in a film formation chamber that is evacuated to a vacuum degree of 5 × 10 ⁻³ Torr (0.665 Pa) or less, preferably 10 ⁻⁴ to 10 ⁻⁶ Torr. At the time of vapor deposition, the organic compound is vaporized by resistance heating in advance, and is scattered in the direction of the substrate by opening the shutter at the time of vapor deposition. The vaporized organic compound scatters upward and is deposited on the substrate through an opening provided in the metal mask.

As a vapor deposition material, an organic compound material made of a low molecule, for example, tris (8-quinolinolato) aluminum (abbreviation: Alq ₃ ), tris (4-methyl-8-quinolinolato) aluminum (abbreviation: Almq ₃ ), bis (10 -Hydroxybenzo [h] -quinolinato) beryllium (abbreviation: BeBq ₂ ), bis (2-methyl-8-quinolinolato)-(4-hydroxy-biphenylyl) -aluminum (abbreviation: BAlq), bis [2- (2- Metal complexes such as hydroxyphenyl) -benzoxazolate] zinc (abbreviation: Zn (BOX) ₂ ) and bis [2- (2-hydroxyphenyl) -benzothiazolate] zinc (abbreviation: Zn (BTZ) ₂ ). . In addition to metal complexes, 2- (4-biphenylyl) -5- (4-tert-butylphenyl) -1,3,4-oxadiazole (abbreviation: PBD), 1,3-bis [5- Oxadiazole derivatives such as (p-tert-butylphenyl) -1,3,4-oxadiazol-2-yl] benzene (abbreviation: OXD-7), 3- (4-tert-butylphenyl) -4 -Phenyl-5- (4-biphenylyl) -1,2,4-triazole (abbreviation: TAZ), 3- (4-tert-butylphenyl) -4- (4-ethylphenyl) -5- (4-biphenylyl) ) -1,2,4-triazole (abbreviation: p-EtTAZ) derivative, 2,2 ′, 2 ″-(1,3,5-benzenetriyl) tris [1-phenyl-1H-benzimidazole ] An imidazole derivative such as (abbreviation: TPBI), a phenanthroline derivative such as bathophenanthroline (abbreviation: BPhen), and bathocuproin (abbreviation: BCP) can be used.

  Here, light emitting elements of three kinds of light emission colors are separately formed on three substrates. Since a hole injection layer, a hole transport layer, a light emitting layer, a (blocking layer), an electron transport layer, and an electron injection layer can be continuously deposited using a single mask, pattern displacement between layers does not occur. In addition, the time from formation of a layer containing an organic compound to formation of the second electrode can be shortened and contamination of impurities (such as moisture) can be reduced as compared with the case where three types of light-emitting elements are formed over the same substrate. Reliability is improved. Further, the laminated structure and film thickness can be changed for each emission color.

In this embodiment, when a blue light emitting element is formed on the first substrate, α-NPD is deposited to 60 [nm] as a hole transport layer. Thereafter, using the same mask, a blue light-emitting layer and a blocking layer are formed, and then an electron transport layer and an electron injection layer are formed. In this example, PPD (4,4′-bis (N- (9-phenanthryl) -N-phenyl) to which CBP (4,4′-bis (N-carbazolyl) -biphenyl) was added as a blue light-emitting layer was used. Amino) biphenyl) 30 nm, SAlq (bis (2-methyl-8-quinolinolato) (triphenylsilanolato) aluminum) 10 [nm] as a blocking layer, and Alq ₃ 40 [nm] as an electron transport layer A film is formed, and 1 nm of CaF ₂ is formed as an electron injection layer.

Further, in this embodiment, when a red light emitting element is formed on the second substrate, α-NPD is deposited to 60 [nm] as a hole transport layer. Thereafter, using the same mask, a red light emitting layer is formed, and then an electron transport layer and an electron injection layer are formed. In this example, 40 nm of Alq ₃ to which DCM is added is formed as a red light emitting layer, 40 nm of Alq ₃ is formed as an electron transport layer, and 1 [CaF ₂ is formed as an electron injection layer. nm] is formed.

In this embodiment, when a green light emitting element is formed on the third substrate, CuPc is formed to 20 nm as a hole injection layer and α-NPD is formed to 60 nm as a hole transport layer. Thereafter, using the same mask, a green light emitting layer is formed, and then an electron transport layer and an electron injection layer are formed. In this embodiment, the green of Alq ₃ which DMQD has been added as a light-emitting layer was 40 [nm] deposition, the Alq ₃ was 40 [nm] deposited as an electron transport layer, a CaF ₂ 1 [as an electron injection layer nm] is formed.

  Moreover, when forming the layer containing an organic compound by the apply | coating method using spin coating, after apply | coating, it is preferable to bake by vacuum heating. For example, a poly (ethylenedioxythiophene) / poly (styrenesulfonic acid) aqueous solution (PEDOT / PSS) acting as a hole injection layer may be applied and fired on the entire surface.

Reference numeral 311 denotes a second electrode made of a conductive film, that is, a cathode (or an anode) of the light emitting element. As a material of the second electrode 311, an alloy such as MgAg, MgIn, AlLi, CaF ₂ , CaN, or a thin film formed by co-evaporation with an element belonging to Group 1 or 2 of the periodic table and aluminum is used. Good. Here, since light is emitted through the second electrode, a stack of a 1 nm to 10 nm aluminum film or an aluminum film containing a small amount of Li and a transparent conductive film is used. Further, a light-transmitting layer (film thickness: 1 nm to 5 nm) made of CaF ₂ , MgF ₂ , or BaF ₂ may be formed as a cathode buffer layer before forming an aluminum film having a thickness of 1 nm to 10 nm.

In order to reduce the resistance of the cathode, an auxiliary electrode may be provided over the second electrode 311 in a region that does not serve as a light emitting region. Further, when the cathode is formed, a resistance heating method by vapor deposition is used, and the cathode may be selectively formed using a vapor deposition mask.

Reference numeral 312 denotes a transparent protective layer formed by vapor deposition, which protects the second electrode 311 made of a metal thin film. Further, the transparent protective layer 312 is covered with a second sealing material 313. Since the second electrode 311 is an extremely thin metal film, if it comes into contact with oxygen, oxidation or the like is not easily generated, and there is a possibility that the second electrode 311 reacts with a solvent or the like contained in the sealing material and changes its quality. By covering the second electrode 311 made of such a metal thin film with a transparent protective layer 312 such as CaF ₂ , MgF ₂ , or BaF ₂ , a solvent contained in the second electrode 311 and the second sealant 313, etc. In addition to preventing reaction with other ingredients, it effectively blocks oxygen and moisture without using a desiccant. CaF ₂ , MgF ₂ , and BaF ₂ can be formed by a vapor deposition method. By continuously forming a cathode and a transparent protective layer by a vapor deposition method, contamination of impurities and the surface of the electrode can be Can be prevented from touching. In addition, if the vapor deposition method is used, the transparent protective layer 312 can be formed under the condition that hardly damages the layer containing the organic compound. In addition, the second electrode 311 may be further protected by providing and sandwiching a light-transmitting layer made of CaF ₂ , MgF ₂ , or BaF ₂ above and below the second electrode 311.

Further, a metal having no oxygen atom in the material itself (material having a high work function), for example, a titanium nitride film is used as the first electrode, and a metal having no oxygen atom in the material itself (material having a low work function) as the second electrode. For example, by using an aluminum thin film and further covering with CaF ₂ , MgF ₂ , and BaF ₂ , the region between the first electrode and the second electrode can be maintained in an oxygen-free state close to zero as much as possible.

In addition, the second sealant 313 bonds the second substrate 314 and the first substrate 300 together. The second sealant 313 is not particularly limited as long as it is a light-transmitting material. Typically, an ultraviolet-curing or thermosetting epoxy resin may be used. Here, a highly heat-resistant UV epoxy resin having a refractive index of 1.50, a viscosity of 500 cps, a Shore D hardness of 90, a tensile strength of 3000 psi, a Tg point of 150 ° C., a volume resistance of 1 × 10 ¹⁵ Ω · cm, and a withstand voltage of 450 V / mil (electro Wright Corporation: 2500 Clear) is used. Further, by filling the second sealant 313 between the pair of substrates, the entire transmittance can be improved.

FIG. 9B shows a simplified stack structure in the light emitting region. Light emission is emitted in the direction of the arrow shown in FIG. Since the transparent first electrode and the transparent second electrode are used as shown in FIG. 9B, light emission can be emitted to both the upper surface and the lower surface.

In the case of forming a top emission type (also referred to as top emission type) light emitting element, the first electrode 318 made of a metal layer may be used instead of the first electrode 308 made of a transparent conductive film. When the first electrode 318 made of a metal layer is used as shown in FIG. 9C, light emission can be emitted only to the upper surface. The material of the first electrode 318 is Ti, TiN, TiSi _x N _y , Ni, W, WSi _x , WN _x , WSi _x N _y , NbN, Mo, Cr, Pt, Zn, Sn, In, or Mo A film mainly composed of an element selected from the above, an alloy material or compound material containing the element as a main component, or a stacked film thereof may be used in a total film thickness range of 100 nm to 800 nm. In the case where a metal film is used as the first electrode 318, it is preferable to increase the work function by performing plasma treatment using ultraviolet irradiation or chlorine gas on the surface.

In the case of forming a bottom emission type (also referred to as a bottom emission type) light-emitting element, an opaque first electrode 311 is used instead of the transparent second electrode 311 formed by stacking a metal thin film and a transparent conductive film. That's fine. As the opaque second electrode 311, an alloy such as MgAg, MgIn, AlLi, CaF ₂ , or CaN, or an element belonging to Group 1 or Group 2 of the periodic table and aluminum formed by a co-evaporation method is used. The metal film is used. When the second electrode 311 made of a thick metal film is used as shown in FIG. 9D, light emission can be emitted only to the lower surface.

  The light-emitting elements shown in FIG. 9B are manufactured on three substrates, that is, three substrates for each emission color. Then, as shown in the best mode described above, a full-color display device can be completed by stacking three substrates so as not to overlap each other in the light emission traveling direction.

  Alternatively, the full-color display device may be manufactured by appropriately stacking the three types of light-emitting elements in FIGS. 9B to 9D. For example, a blue light-emitting element having a blocking layer is manufactured over a first substrate as the stacked structure in FIG. 9B, and a material other than the light-emitting layer is shared over the second substrate as the stacked structure in FIG. 9C. Two types of light-emitting elements (red light-emitting element and green light-emitting element) are manufactured as layers, and the two substrates are combined so that they do not overlap each other in the direction of light emission generated from each light-emitting element. It may be produced.

  This embodiment can be freely combined with the best mode described above.

  In this embodiment, an example of manufacturing a full-color light emitting device with a small number of bonding steps and a small number of substrates to be used is shown in FIG.

  First, TFTs 1020R and 1020G, an insulating film 1012, and a protective film 1013 are formed over the first substrate 1001. Simultaneously with these TFTs, a reflective electrode 1029, routing wires 1024 and 1025, and a connection terminal 1026 are formed. The reflective electrode 1029 is formed at a position where it overlaps with the blue light-emitting element when overlapped with another substrate (second substrate 1006).

  Next, a first electrode serving as an anode (or a cathode) of the light-emitting elements 1021R and 1021G is formed, and an insulator (partition wall) 1028 that covers an end portion of the first electrode is formed. Next, a layer containing an organic compound and a transparent second electrode are formed, so that the light-emitting elements 1021R and 1021G are formed. Note that the layer containing an organic compound in the light-emitting element 1021G contains a green light-emitting material, and the layer containing an organic compound in the light-emitting element 1021R contains a red light-emitting material.

  In addition, the TFT 1010B and the light emitting element 1011B are also formed in advance on the second substrate. Simultaneously with the TFT 1011B, lead wirings 1024 and 1025 and a connection terminal 1026 are formed. The layer containing an organic compound in the light emitting element 1021B contains a blue light emitting material.

Next, a substrate 1001 provided with two types of light-emitting elements and a substrate 1006 provided with one type of light-emitting elements are attached to each other with a sealant 1005 and a filler 1007. When pasting, they are stacked so that they do not overlap each other in the direction of light emission. In this way, a light emitting device for full color display which completes one pixel by combining three types of light emitting elements that emit red, green, and blue is completed.

Finally, FPCs 1018 and 1038 are attached to the connection terminals 1016 and 1036 by anisotropic conductive films 1019 and 1039, respectively.

  The light-emitting device shown in FIG. 10 has a structure in which an observer can visually recognize display by light emission of each light-emitting element that has passed through the second substrate. The light-emitting device illustrated in FIG. 10 has a structure in which the partition wall 1008 does not exist in a portion through which light emitted from the light-emitting elements 1021R and 1021G passes in order to increase transmittance. In addition, the interlayer insulating film 1002 and the protective film 1003 are formed using a material having high transmittance with respect to light emission of the light-emitting element. In order to further increase the transmittance, a structure in which the interlayer insulating film 1002 or the protective film 1003 is selectively removed in a portion where light emission from the light emitting elements 1021R and 1021G passes may be employed.

The light emitting element 1021B may be a bottom emission type or a dual emission type, but when the light emitting element 1021B is a bottom emission type, the second electrode of the light emitting element 1021B is formed by vapor deposition. Therefore, it is necessary to form a film with a portion overlapping with the light emitting elements 1021R and 1021G, and it is difficult to form such a fine pattern. Accordingly, a dual emission type is used, and light emitted from the light-emitting element 1021B is generated on the first substrate side, is reflected by the reflective electrode 1029, passes through the second substrate, and is emitted on the second substrate side. It is preferable to improve the luminance.

The light emitting elements 1021R and 1021G may be a top emission type or a dual emission type. However, it is preferable that the light emitting elements 1021R and 1021G be a top emission type because high luminance can be obtained.

  This embodiment can be freely combined with the best mode described above or Embodiment 1.

Various electronic devices can be manufactured by incorporating a light-emitting display device obtained by implementing the present invention. Electronic devices include video cameras, digital cameras, goggle-type displays (head-mounted displays), navigation systems, sound playback devices (car audio, audio components, etc.), notebook-type personal computers, game devices, and portable information terminals (mobile computers, A mobile phone, a portable game machine, an electronic book, or the like), an image playback device including a recording medium (specifically, a display capable of playing back a recording medium such as a digital versatile disc (DVD) and displaying the image) Apparatus). Specific examples of these electronic devices are shown in FIGS.

  FIG. 11A 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. 11B shows a digital camera, which includes a main body 2101, a display portion 2102, an image receiving portion 2103, operation keys 2104, an external connection port 2105, a shutter 2106, and the like. The present invention can be applied to the display portion 2102. In addition, stereoscopic display is also possible according to the present invention.

  FIG. 11C illustrates a laptop personal computer, which includes a main body 2201, 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. In addition, stereoscopic display is also possible according to the present invention.

  FIG. 11D 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 can be applied to the display portion 2302. In addition, stereoscopic display is also possible according to the present invention.

  FIG. 11E illustrates a portable image reproducing device (specifically, a DVD reproducing device) provided with a recording medium, which includes a main body 2401, a housing 2402, a display portion A2403, a display portion B2404, and a recording medium (DVD or the like). A reading unit 2405, operation keys 2406, a speaker unit 2407, and the like are included. 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. Note that an image reproducing device provided with a recording medium includes a home game machine and the like. In addition, stereoscopic display is also possible according to the present invention.

  FIG. 11F shows a game machine, which includes a main body 2501, a display portion 2505, operation switches 2504, and the like. In addition, stereoscopic display is also possible according to the present invention.

  FIG. 11G shows a video camera, which includes a main body 2601, a display portion 2602, a housing 2603, an external connection port 2604, a remote control receiving portion 2605, an image receiving portion 2606, a battery 2607, an audio input portion 2608, operation keys 2609, and the like. . The present invention can be applied to the display portion 2602. In addition, stereoscopic display is also possible according to the present invention.

  FIG. 11H 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. In addition, stereoscopic display is also possible according to the present invention.

  FIG. 12A shows a helmet viewed from the side, and is equipped with a display device 2804. In addition, FIG. 12 (B) is the helmet seen from the front. 12A and 12B, reference numeral 2801 denotes a helmet body, 2802 denotes a shield, and 2803 denotes a shield attachment portion. A light emitting device is mounted on a helmet in a vehicle having a small space in front of the driver, such as a vehicle such as a motorcycle or a snowmobile. The light emitting device attached to the helmet has a structure that allows the background behind the display to be seen. The light-emitting device is more advantageous than other display devices in that high-definition display is possible, light weight, and small size. The projection type display device has to secure an optical path for projection, and it is difficult to arrange the projection type display device in a limited space in the helmet even if a mirror is used.

  Since the light emitting device 2804 that can see the background on the other side of the display is mounted on the helmet and display is possible within the front view of the wearer, the wearer can display information without diverting his gaze from the front while driving Can be seen safely. Further, the present invention uses an active matrix substrate, and the light-emitting device 2804 can display with high definition. Although not shown in the drawing, a position signal such as latitude and longitude information from a satellite is received by a device called GPS, and the current location is measured by one or both of these detection signals and position signals, and based on the measurement results. Thus, the map information is read out from the storage device, and the current location is displayed on the light emitting device 2804. Further, although not shown, it can be connected to a battery, an antenna, a display control unit, or a vehicle body. Therefore, the light emitting device 2804 can display not only map information but also an instrument related to a vehicle and a character display.

  Moreover, the helmet shown in FIG. 12 can be used not only for a vehicle including a motorcycle but also for a game apparatus for playing a game such as flight simulation by wearing a helmet.

  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 the best mode, Example 1, or Example 2 may be used for the electronic device of this example.

A full-color display device that combines long-term reliability and good color purity can be realized by making three types of light-emitting elements on a plurality of substrates and stacking each of them.

In addition, it is possible to realize a stereoscopic display device that allows a viewer to recognize a stereoscopic image by stacking light emitting elements in a three-dimensional manner and making the display itself a three-dimensional display.

It is a perspective view of the light emitting device of the present invention. It is a top view which shows a pixel structure. It is a perspective view of the light emitting device of the present invention. It is a top view which shows a pixel structure. It is sectional drawing of a light-emitting device. It is a perspective view of the three-dimensional display apparatus of this invention. It is a figure which shows the example of a display. It is sectional drawing of a light-emitting device. 1 is a diagram illustrating Example 1. FIG. FIG. 6 is a diagram showing Example 2. It is a figure which shows an example of an electronic device. It is a figure which shows an example of an electronic device.

Explanation of symbols

101: First panel (blue display)
102: Second panel (displayed in red)
103: Third panel (green display)
104: Full color display screen 105, 106, 107: FPC

Claims (13)

A light-emitting device for full-color display in which three types of light-emitting elements that emit red, green, and blue are combined to form one pixel,
The light-emitting element includes a first electrode, a layer containing an organic compound, and a second electrode,
A light-emitting device comprising a plurality of substrates on which light-emitting elements having different emission colors are formed. A light-emitting device for full-color display in which three types of light-emitting elements that emit red, green, and blue are combined to form one pixel,
Of the three types of light-emitting elements, the first substrate provided with two types of light-emitting elements and the second substrate provided with the remaining one type of light-emitting elements are stacked to perform full-color display. Light-emitting device.   3. The pixel display according to claim 2, wherein two types of light emission that has passed through the first substrate and the second substrate and one type of light emission of a light emitting element provided on the second substrate are used. A light emitting device characterized.   4. The light-emitting element provided over the second substrate according to claim 2, wherein the light-emitting element includes a light-transmitting first electrode, a layer containing an organic compound, and a light-transmitting second electrode. A light emitting device comprising: A light-emitting device for full-color display in which three types of light-emitting elements that emit red, green, and blue are combined to form one pixel,
The light emitting areas of the three types of light emitting elements do not overlap when viewed from the viewer side.
A first substrate in which light emitting elements emitting green light are provided in a matrix;
A second substrate in which light emitting elements emitting blue light are provided in a matrix;
A light-emitting device that performs full-color display by bonding a light-emitting element that emits red light to a third substrate provided in a matrix.   6. The light-emitting element according to claim 5, wherein at least two of the three types of light-emitting elements include a light-transmitting first electrode, a layer containing an organic compound, and a light-transmitting second electrode. A light emitting device comprising:   7. The light emitting device according to claim 1, wherein the first electrode and the second electrode are a cathode or an anode of a light emitting element having a layer containing an organic compound as a light emitting layer. .   8. The TFT according to claim 1, wherein a TFT is connected to the first electrode or the second electrode, and one or both of a TFT source wiring and a TFT gate wiring are formed on different substrates. A light-emitting device that overlaps with each other. 9. The light-emitting device according to claim 1, wherein the first electrode or the second electrode is a transparent conductive film or a metal thin film that transmits light. 10. The electronic device according to claim 1, wherein the light emitting device is a video camera, a digital camera, a vehicle navigation system, a personal computer, or a portable information terminal. A first substrate on which light emitting elements for emitting a first emission color are provided in a matrix;
A second substrate in which light-emitting elements emitting a second emission color are provided in a matrix;
Stacking a plurality of panel groups each formed by stacking light emitting elements emitting a third emission color with a third substrate provided in a matrix,
A three-dimensional display device characterized in that three-dimensionally arranged light emitting elements are lit to make the display itself three-dimensional.   12. The method according to claim 11, wherein the first emission color, the second emission color, and the third emission color are any one of red, orange, green, yellow, blue, and white. 3D display device. 13. The light-emitting element according to claim 11 or 12, wherein the light-emitting element includes a light-transmitting first electrode, a layer containing an organic compound, and a light-transmitting second electrode. 3D display device.

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