JP2006251600A - Display panel, display device, display module, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display panel, a display device, a display module, and electronic equipment wherein the temperature of the display panel can be kept low and the life of the display panel can be extended. <P>SOLUTION: An organic EL panel 2 has a heat sink 6 provided in a non-luminescence area 9 on the panel surface 2a. Since the organic EL panel 2 displays an image by using the whole luminescence area 8, the whole luminescence area 8 serves as a real display area, and the heat sink 6 is provided in the non-luminescence area 9 on the panel surface 2a. Since the heat sink 6 draws heat transmitted to the panel surface 2a side and radiates it, heat generation on the panel surface 2a side can be suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display panel such as an organic EL panel, a display device, a display module, and an electronic device.

In recent years, organic EL (electroluminescence) panels using organic EL elements have attracted attention as being superior to other devices in terms of low power consumption ratio, high viewing angle, and high contrast ratio. In a display device such as an organic EL display or a plasma display that uses a self-luminous element, the display panel has heat, and thus the display panel needs to dissipate heat. Conventionally, for example, a technique described in Patent Document 1 is known as a heat dissipation device for a plasma display panel. In this heat dissipating device, heat dissipating fins are provided between two heat transfer plates which are arranged opposite each other with a predetermined gap and one of which is joined to the back surface of the plasma display panel via a heat conductive sheet so as to be able to transfer heat. ing. The heat dissipating fins are corrugated fins formed by repeating irregular shapes, and the fin longitudinal direction is inclined with respect to the long side and the short side of the heat transfer plate, thereby forming an inclined air passage between the heat transfer plates. . Moreover, in the plasma display device described in Patent Document 1, a heat dissipating device for a plasma display panel is provided on the back side of the plasma display panel so that heat can be transferred.
JP 2000-242182 A

  By the way, as a result of experiments by the present inventors, in a display panel used for a display device such as an organic EL display or a plasma display, the heat generated by each light emitting element of a plurality of pixels is opposite to the panel surface (light emitting surface). It is transmitted not only to the back side of the panel but also to the surface side of the panel. It was found that cooling the panel surface has a high cooling effect on the display panel. For example, in the case of a bottom emission type organic EL panel that includes a light emitting element substrate and a sealing substrate and emits light from the light emitting element substrate side, heat generated in each light emitting element is generated between the light emitting element substrate and the inside of the sealing substrate. In addition to being transmitted to the sealing substrate side through the desiccant contained in the substrate, it is also transmitted to the light emitting element substrate side.

  In the conventional display device as described in Patent Document 1, a heat radiating plate and a heat radiating structure are provided on the back side of the display panel, and heat is radiated on the back side. Therefore, there is a problem that the panel cooling effect is not sufficient and the panel temperature cannot be lowered sufficiently. In particular, in the case of an organic EL panel, it is important for life countermeasures to suppress the temperature rise of the organic EL panel.

  The present invention has been made paying attention to such conventional problems, and the object thereof is to provide a display panel and a display device that can keep the temperature of the display panel low and extend the life of the display panel. It is in providing a display module and an electronic device.

  The display panel according to the present invention is a display panel including a light emitting area in which a plurality of pixels each having a light emitting element are arranged on a substrate and a non-light emitting area in which the pixels are not arranged. The light emitting area is used for image display. The gist is to have an actual display area and an area other than the actual display area, and to provide a heat sink in the area other than the actual display area.

According to this, since the heat sink provided in the area other than the actual display area takes away the heat transmitted to the panel and dissipates it, heat generation of the panel can be suppressed. Therefore, the temperature of the display panel can be kept low, and the life of the display panel can be extended.

The gist of this display panel is that a heat radiating plate is also provided in the non-light emitting area.
According to this, since the heat radiating plate provided also in the non-light emitting area takes away the heat transmitted to the panel (for example, to the panel surface) and radiates heat, the heat generation of the panel (for example, heat generation on the panel surface side) can be suppressed. .

  In this display panel, in a display panel including a light emitting area in which a plurality of pixels having light emitting elements are arranged on a substrate and a non-light emitting area in which the pixels are not arranged, a heat sink is provided in the non light emitting area. The gist.

  According to this, since the heat radiating plate provided in the non-light emitting area takes away the heat transmitted to the panel (for example, to the panel surface) and radiates heat, the heat generation of the panel (for example, heat generation on the panel surface side) can be suppressed.

  In this display panel, the heat dissipation plate is an annular plate in which a portion corresponding to the light emitting area is punched out, and the annular heat dissipation plate is provided in the entire non-light emitting area.

According to this, since the annular heat radiating plate takes away the heat transmitted to the panel in the entire non-light emitting area and dissipates it, heat generation of the panel can be effectively suppressed.
The gist of this display panel is that the surface of the heat radiating plate is provided with a plurality of fins formed by bending a plurality of tongue pieces.

  According to this, the plurality of fins on the surface of the heat radiating plate can radiate the heat transmitted to the panel more effectively, so that the temperature of the display panel can be further reduced and the life of the display panel can be reduced. It can be made even longer.

The gist of this display panel is that engaging portions that elastically engage with both side portions of the display panel are formed on at least both sides of the heat radiating plate.
According to this, it is possible to fix the heat sink to the display panel without using double-sided tape or adhesive by elastically engaging the engagement parts on at least both sides of the heat sink to both sides of the display panel. Can do. In addition, because the heat sink is directly in contact with the panel surface and fixed, the heat dissipated directly by the heat sink due to heat conduction is dissipated from the heat transmitted to the panel surface, resulting in a high heat dissipation effect. Can be more effectively suppressed. In addition, the heat sink can be easily attached to the display panel.

The gist of the display panel is that the light-emitting element is an electroluminescence element.
According to this, the lifetime of electroluminescent panels, such as an organic electroluminescent panel using an electroluminescent element, can be lengthened.

The gist of this display panel is that the heat radiating plate is provided on the panel surface side.
As a result of experiments conducted by the present inventors, heat generated in each light emitting element of a plurality of pixels is not only transmitted to the panel back side opposite to the panel surface but also to the panel surface side, so that the panel surface is cooled. Then, it turned out that the cooling effect of a display panel is high. According to this, since the heat sink provided in the area outside the actual display area on the panel surface deprives the heat transmitted to the panel surface and dissipates heat, heat generation on the panel surface side can be suppressed. Therefore, the temperature of the display panel can be kept low, and the life of the display panel can be extended.

  Here, the “panel surface” refers to a surface (light emitting surface) on the side from which light emitted from the light emitting element is emitted. For example, in the case of a bottom emission type in which a display panel includes a light emitting element substrate and a sealing substrate and light is emitted from the light emitting element substrate side, the surface of the light emitting element substrate from which light is emitted is the panel surface.

The gist of the display device of the present invention is that it has the display panel. According to this, a display panel having a long display panel life can be realized.
The gist of the display module according to the present invention is that a plurality of the display panels are arranged side by side and different images are displayed on the plurality of display panels. According to this, in a display module that displays different images on a plurality of display panels, the life of each display panel can be extended and high-quality display can be maintained over a long period of time.

  The gist of the present invention is that the display module includes the display panel, and is configured to display different images in a plurality of display areas in a light emitting area of the display panel. According to this, in a display module that displays different images on a single panel, the life of the display panel can be extended and high-quality display can be maintained over a long period of time.

  The gist of the electronic apparatus according to the present invention is that the display panel is used. According to this, the lifetime of the display panel can be extended and high-quality display can be maintained over a long period of time.

Hereinafter, embodiments embodying the present invention will be described with reference to the drawings. In the description of each embodiment, similar parts are denoted by the same reference numerals, and redundant description is omitted.
(First embodiment)
A display device 1 according to a first embodiment will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the display device 1 includes an organic EL panel 2 (display panel) as an electroluminescence panel, and a heat dissipation plate 6 provided on the surface of the organic EL panel 2 (panel surface 2a). Is an organic EL display. The organic EL panel 2 as a display panel includes a light emitting element substrate 11 in which a plurality of pixels 220 each having an organic EL element 221 as a self-luminous electroluminescence element (light emitting element) are arranged in a matrix, and a plurality of pixels. And a sealing substrate 12 bonded to the light emitting element substrate 11 so as to seal 220. In FIG. 1, only one of the plurality of pixels 220 is shown. This organic EL panel 2 is a bottom emission in which light emitted from each organic EL element 221 of a plurality of pixels 220 is emitted from the panel surface 2a (see FIG. 3) side of the organic EL panel 2 as indicated by arrows in FIG. This is a type of organic EL panel. The panel surface 2 a is the surface of the light emitting element substrate 11.

  A circularly polarizing plate 7 is affixed to the panel surface 2a, which is a light emitting surface of the organic EL panel 2, in order to prevent external incident light from being reflected on the surface. The circularly polarizing plate 7 is disposed so as to cover the entire light emitting area 8 of each organic EL panel 2. In the organic EL panel 2, the periphery of the light emitting area 8 is a non-light emitting area 9 (see FIG. 2) called a frame.

Although not shown in FIG. 3, rectangular pixel electrodes that function as anodes are formed in a matrix on the light emitting element substrate 11 of the organic EL panel 2. A hole injection / transport layer and a light emitting layer are sequentially laminated, and a cathode is formed over almost the entire surface of the substrate on which the light emitting layer is formed. In addition, a thin film transistor (TFT) or the like is electrically connected to each pixel electrode, and each pixel 220 includes a pixel electrode, a hole injection / transport layer formed thereon, a light emitting layer, and a cathode. An organic EL element 221 (see FIG. 3) is configured. That is, the organic EL element 221 of one pixel shown in FIG. 3 includes a transparent pixel electrode, a hole injection / transport layer, a light emitting layer, and a cathode that is a common electrode. Further, on the light emitting element substrate 11, a plurality of wiring terminal portions (not shown) including a plurality of power supply lines, a plurality of signal lines, and a plurality of control lines are formed.

  As shown in FIG. 3, the sealing substrate 12 is formed in a bottomed cylindrical shape having rectangular convex portions 12 a, and is made of, for example, a transparent glass substrate. In the sealing substrate 12, the end surface of the convex portion 12a is bonded to the light emitting element substrate 11 with an adhesive 51 so as to seal the entire plurality of pixels 220 (see FIG. 3). Further, as shown in FIG. 3, the organic EL panel 2 is housed in a space between the light emitting element substrate 11 and the sealing substrate 12, and includes a desiccant 52 (see FIG. 3) capable of absorbing moisture. . The desiccant 52 is fixed to the inner surface 12b of the sealing substrate 12 with an adhesive.

  2 and 4, the display device 1 includes a panel connect substrate 16 fixed to the surface of the sealing substrate 12 in addition to the organic EL panel 2, and a panel connect substrate 16 substantially at the center. And a fixed mounting base 17. The mounting base 17 is a member required when a plurality of organic EL panels 2 are arranged and fixed to the base plate 5 as shown in FIG. 11, and may not be provided in a normal display device. The display device 1 further includes two panel control boards 22 and 23 on the left and right sides, and a total of four flexible wiring boards 24, 25, 26 and 27 arranged on the left and right sides of the organic EL panel 2.

  In the panel control boards 22 and 23 shown in FIG. 4, for example, various display image data created and supplied by an external circuit based on vehicle information data and image data are used for the organic EL panel 2. Panel control circuits for displaying images are provided. Here, the “vehicle information data” is data such as vehicle speed and engine speed representing vehicle driving information when the moving body is a vehicle such as an automobile. The “image data” includes image data from other systems such as a car navigation device, a television, and a video device mounted on the vehicle, and image data from a storage device such as an HDD or a DVD.

  The panel control circuit of the panel control board 22 is electrically connected to a plurality of wirings on the organic EL panel 2 via the two flexible wiring boards 24 and 25, respectively. The panel control circuit of the panel control board 23 is electrically connected to a plurality of wirings on the organic EL panel 2 via two flexible wiring boards 26 and 27, respectively. In order to obtain such an electrical connection, the input end sides of a plurality of wirings on the flexible wiring boards 24 and 25 are connected to four connectors 28 provided on the panel control board 22. The output end sides of the plurality of wirings on the flexible wiring boards 24 and 25 are electrically connected to the plurality of wirings on the light emitting element substrate 11 through an anisotropic conductive film (ACF). Similarly, the input end sides of the plurality of wirings on the flexible wiring boards 26 and 27 are connected to four connectors 29 provided on the panel control board 23. The output end sides of the plurality of wirings on the flexible wiring boards 26 and 27 are electrically connected to the plurality of wirings on the light emitting element substrate 11 through an anisotropic conductive film (see FIG. 4). .

  Each panel control circuit of these two panel control boards 22 is electrically connected to an external circuit (not shown), for example, and various display image data, control signals, signals such as a power source are supplied from an external circuit. It is input via a connection cable (not shown). Connectors 31 and 32 to which the connection cables are connected are provided on the panel control boards 22 and 23, respectively (see FIG. 4).

  The display device 1 having such a configuration is characterized in that a heat radiating plate 6 is provided in a region outside the actual display region of the panel surface 2a of the organic EL panel 2 as shown in FIGS. In the display device 1 according to the first embodiment, an image is displayed on the entire light emitting area 8 based on various image data. Therefore, the “real display area” of the panel surface 2a of the organic EL panel 2 is a light emitting area. Area 8. Therefore, in this display device 1, the heat sink 6 is provided in the non-light emitting area 9 on the panel surface 2a.

  The heat radiating plate 6 is a thin plate of stainless steel (SUS), and is an annular plate in which a rectangular portion corresponding to the light emitting area 8 of the organic EL panel 2 is punched out by pressing. The annular heat sink 6 is provided on the entire non-light emitting area 9 on the panel surface 2 a of the organic EL panel 2. On both sides of the heat radiating plate 6, bent portions 6 a and 6 b which are bent to engage with both side portions of the light emitting element substrate 11 are formed. As shown in FIGS. 2 and 3, the heat sink 6 having such a shape is attached to the panel surface 2 a of the organic EL panel 2 with a double-sided tape 53.

  In the organic EL panel 2 shown in FIG. 1, the heat generated in each organic EL element 221 of the plurality of pixels 220 is the back of the panel opposite to the panel surface 2a of the organic EL panel 2 as shown by the arrow 54 in FIG. In addition to being transmitted to the 2b side, it is also transmitted to the panel surface 2a side as indicated by an arrow 55 in FIG. In the display device 1 of this example, the heat transferred to the panel back surface 2b side of the organic EL panel 2 is further transferred to the panel connect substrate 16, the panel control substrates 22, 23, etc., and escapes to the outside. The heat transmitted to the panel surface 2a side of the organic EL panel 2 is transmitted to the heat radiating plate 6 by heat conduction and is radiated by the heat radiating plate 6, so that heat generation on the panel surface 2a is suppressed.

  FIG. 5 shows the result of measuring the temperature at the center of the panel surface 2a when the organic EL panel 2 of the display device 1 according to the first embodiment is continuously energized. In FIG. 5, a curve 56 shows the measurement result of the organic EL panel without the heat sink 6 shown in FIG. 1, and a curve 57 shows the measurement result of the organic EL panel 2 having the heat sink 6. As is apparent from the curves 56 and 57 in FIG. 5, it can be seen that the temperature of the center of the panel surface 2 a is lower in the organic EL panel 2 having the heat sink 6 than in the organic EL panel without the heat sink 6. .

According to 1st Embodiment comprised as mentioned above, there exist the following effects.
○ Since the heat radiating plate 6 provided in the area outside the actual display area of the panel surface 2a of the organic EL panel 2 radiates and dissipates heat transmitted to the panel surface 2a side, heat generation on the panel surface 2a side can be suppressed. it can. Therefore, the temperature of the organic EL panel 2 can be kept low, and the life of the organic EL panel 2 can be extended.

O Since the heat radiating plate 6 provided in the non-light emitting area 9 on the panel surface 2a takes away the heat transmitted to the panel surface and dissipates it, heat generation on the panel surface 2a side can be suppressed.
An annular heat sink 6, which is a stainless steel thin plate, is provided over the entire non-light emitting area 9 on the panel surface 2 a of the organic EL panel 2. Thereby, since the annular heat sink 6 radiates and dissipates heat transmitted to the panel surface 2a in the entire non-light emitting area 9 of the panel surface 2a, heat generation on the panel surface 2a side can be effectively suppressed.

(Second Embodiment)
FIG. 6 shows a heat sink 6A used for the organic EL panel of the display device according to the second embodiment.

A plurality of fins 60 formed by bending a plurality of tongue pieces are provided on the surface of the heat radiating plate 6A. In the heat radiating plate 6A of this example, a plurality of fins 60 are provided on the surfaces of two opposing belt-like portions 62 and 64 among the four belt-like portions 61 to 64 that are continuous in a rectangular ring shape. These fins 60 are formed by bending up a plurality of tongue pieces that can be formed by pressing the heat radiating plate 6A. The configuration other than the fins 60 in the display device according to the second embodiment is the same as that of the first embodiment.

According to 2nd Embodiment comprised as mentioned above, there exist the following effects.
O Since the heat transmitted to the panel surface 2a of the organic EL panel 2 is radiated over the entire surface of the plurality of fins 60 provided on the heat radiating plate 6, heat generation on the panel surface 2a side can be more effectively suppressed.

  ○ The plurality of fins 60 on the surface of the heat radiating plate 6A can effectively radiate and dissipate heat transmitted to the organic EL panel, so that the temperature of the organic EL panel can be further reduced, and the life of the display panel Can be made even longer.

(Third embodiment)
A display device 1B according to a third embodiment will be described with reference to FIGS. In this display device 1 </ b> B, two engaging portions 65 that are elastically engaged with both side portions of the organic EL panel 2 are formed on both sides of the heat dissipation plate 6 </ b> B used for the organic EL panel 2. Each engaging portion 65 includes an engaging piece 65a that is elastically deformed, and an engaging claw 65b that is formed at the tip of the engaging piece 65a.

  The engaging pieces 65a of the four engaging portions 65 having such a configuration are elastically deformed, and the engaging claws 65b are engaged with the corners of the panel control board 22 of the organic EL panel 2 as shown in FIG. By combining, the heat sink 6B is fixed to the organic EL panel 2.

According to 3rd Embodiment comprised as mentioned above, there exist the following effects.
O Double-sided tape by elastically engaging each engagement claw 65b of the four engagement portions 65 provided on each side of the heat radiating plate 6B with the corner of the panel control board 22 of the organic EL panel 2 The heat sink 6B can be fixed to the organic EL panel 2 without using an adhesive.

  ○ Since the heat sink 6B is directly in contact with and fixed to the panel surface 2a of the organic EL panel 2, the heat dissipating plate 6B directly dissipates and dissipates the heat transmitted to the panel surface 2a, thereby providing a high heat dissipation effect. And the heat generation on the panel surface 2a side can be more effectively suppressed.

O The mounting of the heat sink 6B to the organic EL panel 2 is also simplified.
(Fourth embodiment)
A display device 1 </ b> C according to the fourth embodiment will be described with reference to FIGS. 9 and 10. This display device 1C is mounted on an instrument panel of a vehicle such as an automobile as a moving body, and displays an image of a speedometer or the like. In the display device 1C, the light emitting area 8 has an actual display area 8a used for image display and an area 8b other than the actual display area. That is, the area 8 b other than the actual display area is an area that is not used for image display in the light emitting area 8.

  As shown in FIG. 9, the heat radiating plate 6 </ b> C used in the organic EL panel 2 includes a non-light emitting area 9 on the panel surface 2 a of the organic EL panel 2 and a real display area outside the circular real display area 8 a in the light emitting area 8. Is provided in a region including the other region 8b. Therefore, the heat radiating plate 6C has a shape in which a circular thin portion 66a corresponding to the circular actual display region 8a is removed by pressing a stainless steel rectangular thin plate.

In addition, the organic EL panel 2 of this example is one of the left and right arrows 67a and 67b by the operation of the direction indicator 42 (see FIG. 12) in the upper left and right direction display portions 8c and 8d of the circular real display area 8a. Are displayed as shown in FIG. Therefore, on the panel surface 2a, a circular circularly polarizing plate 7a covering the circular actual display region 8a and the two direction display portions 8c, 8 are provided.
Rectangular circularly polarizing plates 7b and 7c that respectively cover d are provided. Moreover, as shown in FIG. 9, the heat sink 6C of this example has two rectangular openings 66b and 66c corresponding to the two direction display parts 8c and 8d, respectively, in addition to the circular opening 66a. It has an extracted shape.

  When the display device 1C having such a configuration is mounted on an instrument panel of a vehicle (not shown), the surface of the heat radiating plate 6C shown in FIG. The cover plate 68 is fixed as shown in FIG. The cover plate 68 is formed with openings 68a, 68b, 68c corresponding to the openings 66a, 66b, 66c of the heat sink 6C, respectively. FIG. 10 shows a display state of the display device 1C when such a cover plate 68 is attached to the display device 1C.

  The organic EL panel 2 displays an image of a speedometer scale 91 for displaying the vehicle speed in an analog manner, a numeral 92, and a pointer 93 in the actual display area 8a, and in the direction display portions 8c and 8d, the left and right arrows 67a and 67b are displayed. Display the image.

According to 4th Embodiment comprised as mentioned above, there exist the following effects.
The heat sink 6C has a wide area including the non-light emitting area 9 on the panel surface 2a of the organic EL panel 2 and the region 8b other than the actual display region in the light emitting area 8 (however, the left and right direction display portions 8c and 8d ), The heat transmitted to the panel surface 2a is taken away and radiated, so that heat generation on the panel surface 2a side can be effectively suppressed.

  The display panel having such a configuration is particularly effective when mounted on a vehicle such as an automobile as a moving body and displays an image of a speedometer or the like. That is, when an image such as a speedometer is displayed on the display panel, an area 8b other than the actual display area is formed outside the actual display area 8a in the light emitting area 8, for example. By using it, the heat transmitted to the panel surface can be taken away over a wider area, and the heat generation on the panel surface side can be more effectively suppressed.

(Mobile display module)
Next, an embodiment of a moving body display module as a display module using a display panel will be described with reference to FIGS.

  As shown in FIG. 11, the mobile display module 10 according to the present embodiment includes three display devices each using the same organic EL panels 2, 3, and 4 as the organic EL panel 2 described in the first embodiment. 1 is attached to the base plate 5 in the longitudinal direction.

  Since this base plate 5 is a plate having a flat panel mounting surface, the height position of each display device 1 from the panel mounting surface is changed by changing the thickness of each mounting base 17 of the three display devices 1. is there. Here, the thickness of the mounting base 17 of the middle organic EL panel 2 is made larger than the thickness of the mounting base 17 of the left and right organic EL panels 3 and 4, so that the panel mounting of each organic EL panel 2, 3 and 4 is performed. The arrangement is such that the non-light emitting areas 9 of adjacent panels overlap each other by changing the height position from the surface.

  FIG. 12 shows a state in which the mobile display module 10 having such a configuration is mounted on an instrument panel 41 of a vehicle 40 such as an automobile. Moreover, the display state by this display module 10 is shown in FIG. In FIG. 13, reference numeral 30 denotes a panel cover attached to the surface of each organic EL panel 2, 3, 4 of the three display devices 1. The panel cover 30 is formed with circular openings 33 and 34 and rectangular openings 35 at positions corresponding to the actual display areas of the organic EL panels 2, 3, and 4, respectively.

  As an example, as shown in FIG. 13, the moving body display module 10 displays a speedometer scale 91 for displaying the vehicle speed in an analog manner, a numeral 92, and a pointer 93 using the organic EL panel 2 in the middle. Further, a tachometer scale 94, numeral 95, and pointer 96 for analog display of the engine speed are displayed on the right organic EL panel 3, and an image 97 such as map information of the car navigation device is displayed on the left organic EL panel 4. . In addition, the organic EL panel 4 can also display an image of a television or an image of a DVD device.

According to the mobile display module 10 according to the embodiment configured as described above, the following operational effects are obtained.
In the mobile display module 10 that displays different images on the plurality of organic EL panels 2 to 4, the life of each organic EL panel 2 to 4 can be extended and high-quality display can be maintained over a long period of time. can do.

(Electronics)
Next, an electronic apparatus using the organic EL panel 2 of the display device 1 described in the above embodiments will be described. The organic EL panel 2 can be applied to a mobile personal computer as shown in FIG. A personal computer 70 shown in FIG. 14 includes a main body 72 having a keyboard 71 and a display unit 73 using the organic EL panel 2.

  In addition, when applying the said organic EL panel 2 to an electronic device, among the organic EL panels 2 shown in FIGS. 1-4, at least the light emitting element substrate 11, the sealing substrate 12, the heat sink 6, and four flexible plates. An organic EL panel having a configuration including at least one of the wiring boards 24 to 27 can be used.

According to the personal computer 70, the life of the display unit 73 can be extended and high-quality display can be maintained over a long period of time.
In addition, this invention can also be changed and embodied as follows.

In each of the above embodiments, an organic EL panel used for an organic EL display is described as an example of the display panel. However, a display panel used for a fluorescent plasma display using discharge, a display (FED) using an electron-emitting device, The present invention can also be applied to a display panel used in an SED (Surface-Conduction Electron-Emitter Display), and the same effects as those in the above embodiments can be obtained.

  In each of the above embodiments, the display device 1 using the organic EL panel configured as shown in FIGS. 1 to 4 has been described as an example. However, the present invention includes at least a light emitting element substrate 11, a sealing substrate 12, and The present invention can be widely applied to an organic EL panel having a configuration including the heat sink 6 and a display device using the organic EL panel.

In each of the above embodiments, the heat radiating plate is made of a stainless steel thin plate, but the heat radiating plate may be made of a thin metal plate having a high thermal conductivity instead of stainless steel.
In each of the above embodiments, the heat generation on the panel surface 2a side of the organic EL panel 2 as a display panel is suppressed by the heat dissipation plate, but a heat dissipation plate is also provided on the panel back surface 2b side of the organic EL panel 2 The present invention is also applied to the configuration.

The mobile display module 10 described with reference to FIGS. 11 to 13 includes a plurality of organic EL panels 2 to 4 (three in this example as examples) for displaying different images. Although heat generation on the panel surface 2a side is suppressed, the present invention is not limited to this. In the display module of a moving body configured to display different images in a plurality of display areas (for example, three display areas) in the light emitting area 8 of the organic EL panel 2, heat generation on the panel surface side is generated. The present invention can also be applied to a configuration that is suppressed by a heat sink.

  In each of the above embodiments, the bottom emission type organic EL panel in which light is emitted from the light emitting element substrate side has been described as an example. However, the present invention is a top emission type organic EL panel in which light is emitted from the sealing member side. It is also applicable to. In this case, the “panel surface” on which the heat sink is provided refers to the surface on the sealing member side that is the light emitting surface side of the organic EL panel.

  In the mobile display module 10 shown in FIG. 11, the number of organic EL panels is “3”, but the number is an example, and the present invention uses a plurality of organic EL panels other than “3”. It can be applied to a mobile display module.

  In the mobile display module 10 shown in FIGS. 11 to 13, the three organic EL panels 2 to 4 having the same size are used, but the mobile display using a plurality of organic EL panels having different sizes is used. The present invention can also be applied to modules. For example, when mounted on a vehicle such as an automobile and the speedometer is displayed on the middle panel of the three organic EL panels, the middle panel is enlarged and raised in order to improve the visibility of the speedometer. Preferably, the left and right panels are made smaller and lower than the middle panel.

  -Moreover, in the structure provided with the organic electroluminescent panel in which the light emission area 8 has the real display area 8a and area | regions 8b other than an actual display area like the display apparatus 1C which concerns on the said 4th Embodiment shown in FIG.9 and FIG.10. The present invention is also applicable to a configuration in which the heat radiating plate is provided only in the region 8b other than the actual display region.

  In FIG. 14, a personal computer has been described as an example of an electronic device using the organic EL panel 2. However, the organic EL panel 2 described in the above embodiments is not limited to a personal computer, such as a mobile phone or a digital camera. Applicable to various electronic devices.

The perspective view which shows the display apparatus which concerns on 1st Embodiment. The disassembled perspective view which shows the display apparatus. Sectional drawing which shows a part of organic electroluminescent panel used for the display apparatus. The perspective view which shows the back surface side of the display apparatus. The graph which shows the result of having measured the panel temperature of the display apparatus and the conventional display apparatus. Sectional drawing which shows the organic EL panel. The perspective view which shows the display apparatus which concerns on 2nd Embodiment. Sectional drawing which shows the engaging part of the heat sink in the display apparatus. The disassembled perspective view which shows the display apparatus which concerns on 4th Embodiment. The top view which shows the display state by the display apparatus. The perspective view which shows the display module of the moving body which concerns on one Embodiment. FIG. 2 is a perspective view of the inside of the vehicle on which the display module is mounted. The top view which shows the display state of the display module. The perspective view which shows the personal computer as an electronic device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 2a ... Panel surface, 2b ... Panel back surface, 6, 6A, 6B, 6C ... Heat sink, 2-4 ... Organic EL panel, 8 ... Light emission area, 8a ... Real display area, 8b ... Real display area Non-light emitting area, 9 ... non-light emitting area, 10 ... display module, 11 ... light emitting element substrate, 12 ... sealing substrate, 40 ... vehicle, 60 ... fin, 65 ... engaging portion, 97 ... image, 220 ... pixel.

Claims (12)

In a display panel including a light emitting area in which a plurality of pixels each having a light emitting element are disposed on a substrate and a non-light emitting area in which the pixels are not disposed,
The light emitting area has an actual display area used for image display and an area other than the actual display area,
A display panel, wherein a heat sink is provided in a region other than the actual display region. The display panel according to claim 1,
A display panel, wherein a heat sink is also provided in the non-light emitting area. In a display panel including a light emitting area in which a plurality of pixels each having a light emitting element are disposed on a substrate and a non-light emitting area in which the pixels are not disposed,
A display panel, wherein a heat sink is provided in the non-light emitting area. The display panel according to claim 2 or 3,
The display panel, wherein the heat radiating plate is an annular plate in which a portion corresponding to the light emitting area is punched out, and the annular heat radiating plate is provided in the entire non-light emitting area. In the display panel as described in any one of Claims 1-4,
A display panel, wherein a plurality of fins formed by bending a plurality of tongue pieces are provided on a surface of the heat radiating plate. In the display panel as described in any one of Claims 1-5,
The display panel according to claim 1, wherein engaging portions that are elastically engaged with both side portions of the display panel are formed on at least both sides of the heat radiating plate. In the display panel as described in any one of Claims 1-6,
The display panel, wherein the light emitting element is an electroluminescence element. In the display panel as described in any one of Claims 1-7,
A display panel, wherein the heat radiating plate is provided on a panel surface side. A display device comprising the display panel according to claim 1. 9. A display module comprising: a plurality of display panels according to claim 1 arranged side by side so that different images are displayed on the plurality of display panels. A display module comprising the display panel according to claim 1, wherein different images are displayed in a plurality of display areas in the light emitting area. An electronic apparatus using the display panel according to claim 1.

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