JP2011175779A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device with a simple structure without using a matrix segment structure, the display device being capable of independently controlling an emission of lights in a plurality of colors and displaying a light pattern with a high luminance. <P>SOLUTION: The display device 1 includes a light emitting layer 2 and an electrode part 3. The electrode part 3 has a transparent electrode 5 and a counter electrode 6 opposite from the transparent electrode 5 across the light emitting layer 2. The light emitting layer 3 is divided into a plurality of regions and arranged on the transparent electrode 5. The counter electrode 6 includes a lamination of a first electrode layer 61 covering one region 2b facing an outer periphery of the light emitting layer and a second electrode layer 62 covering an other region 2a not facing the outer periphery of the light emitting layer, with an insulating layer 63 interposed between the electrode layers 61, 62. Because the light emission of each of the regions 2a, 2b can be independently controlled by supplying power to the light emitting layer 2 through different lines with respect to the regions 2a, 2b, by forming the light emitting layer 2 with desired colors for each of the regions 2a, 2b, light emission of a plurality of colors can be separately controlled. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device that displays a predetermined light pattern by light emission.

  2. Description of the Related Art Conventionally, some display devices of this type include an organic EL light emitting element having excellent light emission efficiency as a light emitting unit. An organic EL light-emitting device is a planar light source in which a transparent electrode serving as an anode, a light-emitting layer composed of an organic substance, and an aluminum electrode serving as a cathode are sequentially laminated on a transparent substrate, and a voltage is applied between both electrodes. As a result, the light emitting layer emits light, and light is extracted through the substrate. In addition, a moisture absorption layer and a sealing layer may be provided from a viewpoint of protecting the light emitting layer and each electrode.

  By the way, if a display device that emits light in a plurality of colors and independently controls light emission of each color by using the planar light emitting element as described above, the attractiveness by the light pattern is improved. When such a display device is used for, for example, a guide light, it can be used such that a sign part such as a pattern or a character for guiding an emergency exit blinks in green, and other background parts are lit in white. Become.

  Therefore, as a method for individually controlling the light emission of a plurality of colors, there is a technique for combining a plurality of light emitting elements (see, for example, Patent Document 1). However, in such a technique, when the guide light is configured as described above, the light emitting layer is divided into a region facing the outer edge and a region not facing the outer edge due to the structure of the sign and the background portion. In the so-called sea-island structure, it becomes difficult to take out the electrode laminated on the region not facing the outer edge on the substrate.

  Further, there is a matrix type organic EL display device in which light emitting layers composed of three colors of RGB are arranged in units of dots (for example, see Patent Documents 2 and 3). However, such a technique is suitable as a display for displaying a moving image, but it is over-spec when displaying an image that does not change a picture such as a guide light. In addition, since it is necessary to form a fine segment structure, when the light emitting layer is applied separately, high accuracy is required for the alignment of the vapor deposition mask, and the manufacturing cost increases. Furthermore, the electrode formation pattern becomes fine, and connection with an external power source becomes difficult.

  In addition, although there exists a technique which colors the light from a light emission part using a color filter (for example, refer patent document 4), the brightness | luminance of a light pattern may fall by absorption of a color filter.

JP 2008-227326 A JP 2008-107628 A Japanese Patent Application Laid-Open No. 09-102395 JP 2009-75606 A

  The present invention has been made to solve the above-described problems, and it is possible to independently control light emission of a plurality of colors while having a simple structure without using a matrix-type segment configuration, It is an object of the present invention to provide a display device capable of displaying a light pattern with luminance.

  In order to achieve the above object, an invention according to claim 1 includes a light emitting layer and an electrode portion that sandwiches the light emitting layer and feeds power to the light emitting layer, and controls power feeding to the light emitting layer to control predetermined light. In the display device for displaying a pattern, the electrode unit includes a transparent electrode provided on a transparent substrate, and a counter electrode facing the transparent electrode with the light emitting layer interposed therebetween, and the light emitting layer includes: The counter electrode is divided into a plurality of regions on the transparent electrode, and the counter electrode includes a first electrode layer covering one region facing the outer edge of the light emitting layer, and the light emitting layer. A second electrode layer covering the other region not facing the outer edge is laminated, and an insulating layer is interposed between the first and second electrode layers.

  According to a second aspect of the present invention, in the first aspect of the invention, the first electrode layer is disposed closer to the light emitting layer than the second electrode layer.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the first and second electrode layers are led out from the outer edge of the light emitting layer in different directions, and are formed on the substrate. It is electrically connected to the extraction electrode to be formed.

  According to the first aspect of the present invention, the first electrode layer covers a region facing the outer edge of the light emitting layer, and the second electrode layer covers a region not facing the outer edge of the light emitting layer. Since the layers are insulated from each other, power supply to the light-emitting layer can be controlled separately for each region, and light emission in each region can be controlled independently. Therefore, by forming the light-emitting layer in a desired color for each region, the light emission of multiple colors can be individually controlled with a simple structure without using a fine segment structure like a matrix display device. It is possible to display a highly attractive light pattern. In addition, since light can be arranged without using a color filter, a high-luminance light pattern can be displayed, which is suitable for use as a guide light. In addition, since it is only necessary to divide the light-emitting layer into necessary regions in one light-emitting element, a high degree of accuracy is required for the alignment of the evaporation mask when forming the light-emitting layer as in a matrix display device. Therefore, it can be manufactured easily.

  According to the invention of claim 2, an insulating layer is formed on the first electrode layer, and then the second electrode layer is formed on the insulating layer over the entire area of the light emitting layer. Since the second electrode layer can be taken out while the insulation is removed, it is easy to supply power to each region of the light emitting layer in a separate system.

  According to the invention of claim 3, the first and second electrode layers and the extraction electrode can be easily connected without short-circuiting each other, and the connection between the extraction electrode and the external power source is facilitated.

1 is an exploded perspective view of a display device according to a first embodiment of the present invention. The top view of the said display apparatus. (A) is the sectional view on the AA line of FIG. 2, (b) is the sectional view on the BB line of FIG. The figure which shows the formation procedure of the anode in the said display apparatus, a light emitting layer, and a cathode in time series. The figure which shows the formation procedure of the sealing substrate in the said display apparatus in time series. The disassembled perspective view of the display apparatus which concerns on the modification of the said embodiment. The disassembled perspective view of the display apparatus which concerns on the other modification of the said embodiment. The top view of the display apparatus of the said modification. (A) is the CC sectional view taken on the line of FIG. 8, (b) is the DD sectional view taken on the line of FIG. The perspective view of the display apparatus which concerns on the 2nd Embodiment of this invention. The disassembled perspective view of the said display apparatus. The disassembled block diagram when the light emission panel of the said display apparatus is seen from the opposite side to the light emission surface.

(First embodiment)
A display device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3 show a configuration of the display device 1 according to the present embodiment. The display device 1 displays a predetermined light pattern by light emission, and constitutes an organic EL type planar light emitting element as a light emitting part. The display device 1 includes a light emitting layer 2, an electrode portion 3 that sandwiches the light emitting layer 2 and supplies power to the light emitting layer 2, and a transparent element substrate 4 on which the light emitting layer 2 and the electrode portion 3 are provided. 2 is extracted through the element substrate 4. Here, the electrode section 3 is composed of a transparent anode 5 (transparent electrode) formed on the element substrate 4 and a cathode 6 (counter electrode) facing the anode 5 with the light emitting layer 2 interposed therebetween. In the following description, the x direction shown in the figure is the left-right direction in the apparatus 1 and the y direction is the front-rear direction.

  The light-emitting layer 2 is divided into two regions on the anode 5 and has a light-emitting region 2a formed in a circular pattern and a light-emitting region 2b formed in a pattern surrounding the circle. . The light emitting region 2 a is a region that does not face the outer edge of the light emitting layer 2. Here, the light emitting region 2 a is composed of a green organic phosphor, and emits green light when fed from the electrode unit 3. The light emitting region 2b is a region facing the outer edge of the light emitting layer 2. Here, the light emitting region 2b is composed of a white organic phosphor and emits white light when fed. The light emitting region 2a and the light emitting region 2b are insulated from each other by a gap C1. The light emitting layer 2 may have a hole transport layer for improving the hole injection property on the anode 5 side and an electron transport layer for improving the electron injection property on the cathode 6 side.

  The anode 5 of the electrode portion 3 is a transparent electrode layer made of ITO (indium tin oxide), and one end portion thereof is led out from the outer edge of the light emitting layer 2 to serve as an extraction electrode 5a. Here, if a Mo—Al—Mo laminated film is formed as an auxiliary electrode on the outer peripheral portion on the anode 5, light unevenness of the light emitting layer 2 due to a voltage drop can be reduced. The Mo layer on the anode 5 side has a function to increase the affinity with the anode 5 (ITO), the Al layer has a function to improve the conductivity of the anode 5, and the outer Mo layer protects the Al layer from scratches and corrosion. It has a function to do. The Mo—Al—Mo laminated film is formed using a sputtering method, and the thickness dimension of each layer is preferably about 50 nm, 500 nm, and 50 nm, respectively.

  The cathode 6 is made of a non-transparent metal, such as aluminum or silver, and can reflect light emitted from the light emitting layer 2 toward the element substrate 4 with high efficiency. The cathode 6 is not necessarily a non-transparent electrode, and may be composed of a transparent electrode like the anode 5. The cathode 6 is formed by laminating a first electrode layer 61 that covers one light emitting region 2b of the light emitting layer 2 and a second electrode layer 62 that covers the other light emitting region 2a. An insulating layer 63 is interposed between the second electrode layers 61 and 62.

  The first electrode layer 61 is coated on the light emitting region 2b along a pattern surrounding a circle, and the light emitting region 2a is exposed from the circular hollow portion. The first electrode layer 61 is disposed closer to the light emitting layer 2 than the second electrode layer 62. The insulating layer 63 is formed on the first electrode layer 61 along a pattern surrounding a circle, and, like the first electrode layer 61, the light emitting region 2a is exposed from the circular hollow portion. The insulating layer 63 is made of, for example, a polyimide resin. The second electrode layer 62 is formed on the insulating layer 63 so as to cover the entire area including the circular hollow portion, thereby covering the light emitting region 2a. The first and second electrode layers 61 and 62 are led out from the outer edge of the light emitting layer 2 in different left and right directions and taken out onto the element substrate 4. Here, the light emitting layer 2, the anode 5, and the cathode 6 are sealed with a sealing substrate 7 in order to ensure water resistance, gas barrier properties, and the like. The sealing substrate 7 has a can shape with an opening on the lower surface, and is provided to face the element substrate 4. The material used for the sealing substrate 7 is a material having a high thermal conductivity and low oxygen permeability and water vapor permeability, such as stainless steel or copper, because the light emitting layer 2 is deteriorated in characteristics due to temperature, humidity, oxygen and the like. It is desirable to use a metal material such as silicon or a resin material such as silicon.

  The element substrate 4 is made of a member having excellent light transmittance, such as glass or transparent resin, and the side opposite to the side where the light emitting layer 2 is provided (the back side) is the light emitting surface. On the surface of the element substrate 4 on the light emitting layer side, an extraction electrode 61 a electrically connected to the lead-out portion of the first electrode layer 61 and an extraction electrode 62 a electrically connected to the lead-out portion of the second electrode layer 62 are provided. Is provided. The extraction electrodes 61 a and 62 a are transparent electrodes made of ITO, and are provided on the left and right side portions on the element substrate 4 in correspondence with the lead-out directions of the first and second electrode layers 62. The extraction electrodes 51a and 61a are connected to the power source E1, and the extraction electrodes 5a and 62a are connected to the power source E2. Further, in the present display device 1, if insulating portions are formed in the regions 2 a and 2 b of the light emitting layer 2 and in the gap portion C <b> 2 between the anode 5 and the cathode 6, the insulation of these portions can be reliably ensured.

  A method for manufacturing the display device 1 will be described with reference to FIGS. First, as shown in FIG. 4A, an anode 5 and extraction electrodes 61a and 62a are formed by forming an ITO film on the element substrate 4 and patterning the ITO film. Next, as shown in FIG. 4B, on the anode 5, the light emitting region 2a of the light emitting layer 2 is formed in a circular pattern, and the light emitting region 2b is formed in a pattern surrounding the circle. At this time, film formation is performed while appropriately masking so that the light emitting regions 2a and 2b do not mix with each other. Next, as shown in FIG. 4C, an insulating portion 8a made of polyimide resin is formed in the gap between the anode 5 and the extraction electrodes 61a and 62a.

  Next, as shown in FIG. 4D, a first electrode layer 61 is formed on the light emitting region 2b so as to follow a pattern surrounding a circle. Examples of the method for forming the first electrode layer 61 include a method of depositing a metal such as aluminum by a sputtering method. At this time, it forms so that the one end part of the 1st electrode layer 61 may be connected with the extraction electrode 61a. Further, if a metal film such as the first electrode layer 61 is formed on the connection portion with the external power source on the extraction electrode 61, the connection resistance can be reduced. Next, as shown in FIG. 4E, an insulating layer 63 (for example, a polyimide resin layer) is formed on the first electrode layer 61 so as to follow a pattern surrounding a circle. Next, as shown in FIG. 4F, a second electrode layer 62 is formed on the insulating layer 63 and the light emitting region 2a by vapor deposition of aluminum or the like. At this time, the second electrode layer 62 is formed so that one end portion thereof is connected to the extraction electrode 62 a on the element substrate 4.

  Thereafter, as shown in FIG. 5A, an insulating layer 8 b is formed on one surface of the second electrode layer 62. Next, as shown in FIG. 5B, the sealing substrate 7 is bonded to the insulating layer 8b with an adhesive, whereby the display device 1 is completed. The adhesive used for joining the sealing substrate 7 is preferably excellent in airtightness in a low temperature to normal temperature range, for example, a thermosetting epoxy resin adhesive, an ultraviolet curable acrylic resin adhesive, or the like. May be used.

  Here, since the resin adhesive as described above has a relatively high oxygen permeability and water vapor permeability, even when the sealing substrate 7 is provided, water, air, or the like passes from the adhesion portion. In some cases, deterioration of the light emitting layer 2 cannot be prevented. As a method of solving this problem, there is a method of joining the sealing substrate 7 by glass fusion. In this case, it is preferable to use a glass frit having a low melting point. However, heating of 300 ° C. or more is still necessary for glass fusing, and therefore, a fused portion of the sealing substrate 7, a heat-sensitive light emitting layer and an insulating film, Need to be separated as much as possible. Therefore, as shown in FIG. 5C, a region T to be fused is provided on the extraction electrodes 61a and 62a, and the sealing substrate 7 is fused with the glass frit in the region T. At this time, since it is necessary to heat only the glass frit, a laser irradiation heating apparatus is used. Accordingly, it is desirable to use a glass frit containing a light absorber so that light energy can be efficiently absorbed. Further, from the viewpoint of preventing warpage of the sealing substrate 7 and the extraction electrodes 61a and 62a due to heating, it is desirable that the materials used for the substrate 7 and the extraction electrodes 61a and 62a have close linear expansion coefficients.

  The operation of the display device 1 configured as described above will be described. When the switch of the power supply unit E1 is turned on and power is supplied from the power supply unit E1 to the anode 5 and the first electrode layer 61, the light emitting region 2b of the light emitting layer 2 emits light, and a light pattern that surrounds a circle is displayed. Is done. On the other hand, when the switch of the power supply unit E2 is turned on and power is supplied from the power supply unit E2 to the anode 5 and the second electrode layer 62, the light emitting region 2a of the light emitting layer 2 emits light, and a circular light pattern is formed. Is displayed. Here, if the power supply by the power supply units E1 and E2 is appropriately controlled, the light emitting areas 2a and 2b can be switched to the on, flashing, or extinguished state, and the light emission pattern can be changed variously. become.

  As described above, according to the display device 1 according to the present embodiment, the first electrode layer 61 covers the region 2 b facing the outer edge of the light emitting layer 2, and the second electrode layer 62 faces the outer edge of the light emitting layer 2. Since the electrode layers 61 and 62 are covered with each other, the power supply to the light-emitting layer 2 is separated for each of the regions 2a and 2b. The light emission of 2b can be controlled independently. Therefore, by forming the light emitting layer 2 in a desired color for each region, light emission of a plurality of colors can be individually performed with a simple structure without using a fine segment structure as in a matrix display device. It is possible to control and display a highly attractive light pattern. Further, since light can be arranged without using a color filter, a high-luminance light pattern can be displayed. Further, since it is only necessary to divide the light emitting layer 2 into necessary regions in one light emitting element, a high degree of accuracy is required for alignment of the vapor deposition mask when forming the light emitting layer 2 as in a matrix type display device. It is not necessary and can be manufactured easily.

  Further, the insulating layer 63 is formed on the first electrode layer 61, and then the second electrode layer 62 is formed over the entire region of the light emitting layer 2 on the insulating layer 63, whereby the electrode layers 61 and 62 are formed. Since the second electrode layer 62 can be taken out while insulating between them, it becomes easy to supply power to the regions 2a and 2b of the light emitting layer 2 in different systems. Further, the first and second electrode layers 61 and 62 and the extraction electrodes 61a and 62a can be easily connected without short-circuiting each other, and the extraction electrodes 61a and 62a are connected to the external power sources E1 and E2. It becomes easy.

  A modification of the above embodiment will be described with reference to FIG. In the display device 1 of this modification shown in FIG. 6, the second electrode layer 62 is led out from the outer edge of the light emitting layer 2 and is electrically connected to the extraction electrode 62 a in the rear part on the element substrate 4. . Here, each lead-out portion of the first and second electrode layers 62 has a shape extending only partially from the outer edge of each layer. Also in the display device 1 of such a modification, the connection between the first and second electrode layers 61 and 62 and the extraction electrode and the connection between the extraction electrode and the external power source can be easily performed as in the above embodiment.

  Another modification of the above embodiment will be described with reference to FIGS. The display device 1 according to this modification shown in these drawings has a two-layered anode structure, and includes an electrode layer 51 (anode) formed on the element substrate 4 and a light emitting region 2a formed on the electrode layer 51. And an insulating layer 52, an electrode layer 53 (anode) formed on the insulating layer 52, a light emitting region 2b formed on the electrode layer 53, and a cathode 6 formed on the light emitting region 2b. The electrode layer 51 is formed so as to cover the entire surface of the element substrate 4, and is led out to the right side from the outer edge of the light emitting layer 2 to become an extraction electrode 51 a. The insulating layer 52 is formed on the electrode layer 51 so as to surround the circular shape of the light emitting region 2a, and insulates the electrode layers 51 and 53 from each other. The electrode layer 53 is formed on the insulating layer 52 along a pattern surrounding a circle, and is led out to the left from the outer edge of the light emitting layer 2 to be electrically connected to the extraction electrode 53a. The cathode 6 is formed so as to cover the entire area including the circular hollow portion on the light emitting region 2b, thereby covering the light emitting region 2a. The cathode 6 is led forward from the outer edge of the light emitting layer 2 and is electrically connected to the extraction electrode 6a. The extraction electrodes 53a and 6a are connected to the power source E1, and the extraction electrodes 51a and 6a are connected to the power source E2.

  According to the display device 1 of such a modification, when power is supplied from the power supply unit E1 to the electrode layer 53 and the cathode 6, the light emitting region 2b emits light, and a light pattern that surrounds the circle is displayed. On the other hand, when power is supplied from the power source E2 to the electrode layer 51 and the cathode 6, the light emitting region 2a emits light, and a circular light pattern is displayed. Accordingly, if the power supply by the power supply units E1 and E2 is appropriately controlled, it becomes possible to change the lighting state of the light emitting areas 2a and 2b, so that similarly to the above embodiment, the light emission of a plurality of colors can be individually controlled. A highly attractive light pattern can be displayed.

(Second Embodiment)
A display device according to a second embodiment of the present invention will be described with reference to FIGS. 10 and 11 show the configuration of the display device 1 according to the present embodiment. The display device 1 is used as a guide light for guiding an emergency exit, and includes a light-emitting panel 10 that emits light in a humanoid pattern. The display device 1 also includes a power supply circuit 11 that supplies power to the light emitting panel 10, an electrical connection member 12 that electrically connects the light emitting panel 10 and the power supply circuit 11, and a control circuit 13 that controls the lighting state of the light emitting panel 10; The battery 14 functions as an auxiliary power source in the event of a power failure, and the housing 15 that houses the power circuit 11, the control circuit 13, the battery 14, and the like.

  The light-emitting panel 10 is configured to emit a human-shaped pattern (hatched portion) in green, and to emit a pattern (cross hatch portion) surrounding the human-shaped pattern in white. The light emitting panel 10 is attached to the opening of the housing 15 and has an outer size of 150 mm × 150 mm and a thickness of about 1 mm. Other configurations of the light emitting panel 10 will be described later.

  The power supply circuit 11 has a function of converting a direct-current voltage from a direct-current power source into a voltage necessary for driving the light-emitting panel 10, and is formed by mounting a DC / DC converter or the like on an organic substrate. . For example, an FR-4 substrate having a size of 80 mm × 80 mm is used as the organic substrate.

  The electrical connection member 12 is composed of a flexible wiring board on which a connector connected to the power supply circuit 11 is mounted, and a plurality of terminal portions that are electrically connected to the power extraction lead electrode disposed on the back surface of the light emitting panel 10 on the wiring board. 12a. The terminal portion of the electrical connection member 12 is made of a gold-plated electrode, and is thermocompression bonded to the take-out electrode of the light-emitting panel using an anisotropic conductive film (ACF) or a conductive paste (ACP). As the above-mentioned flexible wiring board, it is desirable to use a wiring board in which a copper foil is laminated on a film of polyimide or LCP (Liquid Crystal Polymer).

  The control circuit 13 has a function of controlling lighting of each pattern of the light emitting panel 10 based on a predetermined operation program, and is configured by mounting a control microcomputer or the like on an organic substrate. As the above-mentioned operation program, for example, it is conceivable to blink a humanoid pattern in an emergency. The control circuit 13 is not limited to the above configuration, and may be configured as a module integrated with the power supply circuit 11.

  The battery 14 preferably has a capacity capable of driving the light emitting panel 10 for at least 30 minutes at the time of a power failure. For example, a Li ion rechargeable battery having a size of about 30 mm × 50 mm × 10 mm may be used.

  The casing 15 is a box having an outer size of 150 mm × 150 mm and a height of 10 mm, and is formed of, for example, a plastic material such as polyethylene (PS) or polyethylene (PE). The housing 15 has an indicator 15a that displays the operating state of the light emitting panel 10 on the front surface thereof.

  FIG. 12 shows a specific configuration of each part constituting the light emitting panel 10. The light-emitting panel 10 includes a light-emitting layer 2, an anode 5 and a cathode 6 that supply power to the light-emitting layer 2, an element substrate 4 provided with the light-emitting layer 2, the anode 5, and the cathode 6, and a sealing that seals the light-emitting layer 2 and the like. And a substrate 7. The light emitting layer 2 has a light emitting region 2a formed in a humanoid pattern and a light emitting region 2b formed in a pattern surrounding the humanoid. The light emitting region 2 a is a region in which the human-shaped head portion does not face the outer edge of the light emitting layer 2, and the other portion is a region that faces the outer edge of the light emitting layer 2. The light emitting region 2 a is composed of a green organic phosphor and emits green light when fed from the anode 5 and the cathode 6. The light emitting region 2b is a region facing the outer edge of the light emitting layer 2, and here, it is composed of a white organic phosphor, and emits white light when fed. The outer dimension of the light emitting layer 2 is 130 mm × 130 mm, and an insulating gap is provided with a width of 200 μm between the light emitting regions 2a and 2b.

  The anode 5 is led out from the outer edge of the light emitting layer 2 in both the left and right directions, and forms a pair of extraction electrodes 5 a on the element substrate 4. The cathode 6 includes first and second electrode layers 61 and 62, and the first electrode layer 61 is formed on the light emitting region 2 b along a pattern surrounding a human figure, and the second electrode layer 62 is formed. However, the entire surface of the insulating layer 63 having a pattern surrounding the human figure is covered to cover the light emitting region 2a. Two first electrode layers 61 are led forward from the outer edge of the light emitting layer 2 and are electrically connected to the extraction electrodes 61a and 61b, respectively. The second electrode layer 62 is led out from the outer edge of the light emitting layer 2 to one front and two to the left and right, respectively, and is electrically connected to the extraction electrodes 61 a to 62 c on the element substrate 4. The extraction electrode 5a has a size of 30 mm × 10 mm, the extraction electrodes 62a and 62b have a size of 49 mm × 5 mm, and a gap of about 1 mm is provided between the extraction electrodes 5a and 62a and 62b. The element substrate 4 is composed of a substrate made of alkali-free glass and having an outer size of 150 mm × 150 mm and a thickness of 0.7 mm.

  In the display device 1 configured as described above, when a voltage is applied to the anode 5 and the first electrode layer 61, the light emitting region 2b of the light emitting layer 2 emits light, and a light pattern that surrounds the human figure is displayed. Is done. On the other hand, when power is supplied to the anode 5 and the second electrode layer 62, the light emitting region 2a of the light emitting layer 2 emits light, and a human-shaped light pattern is displayed. Accordingly, similarly to the above-described embodiment, light emission of a plurality of colors can be individually controlled, a highly attractive light pattern can be displayed, and the inducing effect in an emergency can be improved.

  In addition, this invention is not restricted to the structure of the said various embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. For example, in the above, the case where only one region is formed that does not face the outer edge of the light emitting layer 2 is shown, but there are two or more such regions and each region emits light in different colors. In addition to the first and second electrode layers 61 and 62, by providing another electrode layer, it is possible to individually control the light emission of these multiple colors. In addition, the second electrode layer 62 is not limited to a configuration in which the second electrode layer 62 is formed on one surface of the insulating layer 63, and can cover the region that does not face the outer edge of the light emitting layer 2 and can be led out onto the substrate 4. For example, it may be formed on the insulating layer 63 with a predetermined width from the region not facing the outer edge of the light emitting layer 2 toward the extraction electrode on the substrate 4.

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Light emitting layer 2a Light emission area | region (other area | region)
2b Light emitting area (one area)
3 Electrode section 4 Element substrate (substrate)
5 Anode (transparent electrode)
6 Cathode (counter electrode)
61 1st electrode layer 62 2nd electrode layer 63 Insulating layer 61a, 61b, 62a-62c Extraction electrode

Claims (3)

A display device that includes a light emitting layer and an electrode portion that sandwiches the light emitting layer and feeds power to the light emitting layer, and displays a predetermined light pattern by controlling power feeding to the light emitting layer,
The electrode portion includes a transparent electrode provided on a transparent substrate, and a counter electrode facing the transparent electrode with the light emitting layer interposed therebetween,
The light emitting layer is arranged to be divided into a plurality of regions on the transparent electrode,
The counter electrode includes a first electrode layer covering one region facing the outer edge of the light emitting layer, and a second electrode layer covering the other region not facing the outer edge of the light emitting layer. A display device comprising a plurality of layers and an insulating layer interposed between the first and second electrode layers.   The display device according to claim 1, wherein the first electrode layer is disposed closer to the light emitting layer than the second electrode layer.   The said 1st and 2nd electrode layer is derived | led-out from the outer edge of the said light emitting layer in a mutually different direction, and is electrically connected with the extraction electrode formed on the said board | substrate. Item 3. The display device according to Item 2.

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