WO2021210261A1 - Display device and method for manufacturing display device - Google Patents

Display device and method for manufacturing display device Download PDF

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Publication number
WO2021210261A1
WO2021210261A1 PCT/JP2021/005873 JP2021005873W WO2021210261A1 WO 2021210261 A1 WO2021210261 A1 WO 2021210261A1 JP 2021005873 W JP2021005873 W JP 2021005873W WO 2021210261 A1 WO2021210261 A1 WO 2021210261A1
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Prior art keywords
frame
light emitting
organic light
panel
potting material
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PCT/JP2021/005873
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French (fr)
Japanese (ja)
Inventor
侯宏 松岡
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株式会社デンソー
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Publication of WO2021210261A1 publication Critical patent/WO2021210261A1/en

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8794—Arrangements for heating and cooling
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the disclosure in this specification relates to a display device having an organic emission (Electro Luminescence: abbreviated as EL) panel and a method for manufacturing the display device.
  • EL Organic Luminescence
  • the vehicle display device described in Patent Document 1 has a display panel housed in a case, and a translucent protective panel is provided on the front side of the organic EL panel. A translucent member is provided between the translucent protective panel and the display panel.
  • the organic EL panel Unlike the liquid crystal display panel, the organic EL panel generates heat in the entire display unit because it emits light by itself. In an environment where the temperature tends to be high, such as when mounted on a vehicle, it is necessary to efficiently dissipate heat and cool the organic EL panel.
  • an object of the present invention is to provide a display device capable of promoting heat dissipation of the organic light emitting panel and a method for manufacturing the display device.
  • the display device disclosed here includes an organic light emitting panel having a display surface for displaying an image, a flat plate-shaped frame provided at intervals from the back surface opposite to the display surface, and having thermal conductivity, and an organic. It is provided so as to protrude from the front surface of the frame on the side facing the back surface of the light emitting panel, has elasticity, and contacts the back surface of the organic light emitting panel to maintain the distance between the back surface of the organic light emitting panel and the front surface of the frame.
  • a plurality of potting materials that are filled in a closed portion surrounded by a wall portion, a wall portion, the back surface of the organic light emitting panel, and the front surface of the frame and have thermal conductivity, and the frame communicates with the closed portion. It is a display device in which a hole is formed.
  • frames are provided at intervals on the back surface of the organic light emitting panel.
  • the closed portion between the organic light emitting panel and the frame is filled with a potting material. Since the frame has a plurality of holes communicating with the closed portion, after assembling the frame to the organic light emitting panel, the precursor of the potting material is poured from the holes into the closed space to provide the potting material in the closed space. Can be done. As a result, even if the organic light emitting panel is curved or there is a tolerance due to manufacturing, the back surface of the organic light emitting panel and the frame can be connected by a potting material without a gap.
  • the wall portion has elasticity, it is possible to form a closed space by absorbing the difference in the distance between the organic light emitting panel and the frame due to the curvature and the tolerance. Since the frame and the potting material have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the frame to the external space. As a result, the organic light emitting panel can efficiently dissipate heat.
  • an organic light emitting panel having a display surface for displaying an image and a back surface opposite to the display surface are provided at intervals, and a plurality of holes are formed to form heat.
  • the organic light emitting panel is provided so as to project from the front surface of the frame on the side facing the back surface of the organic light emitting panel and the flat frame having conductivity, and has elasticity and comes into contact with the back surface of the organic light emitting panel. It is a method of manufacturing a display device having a wall portion that maintains a distance between the back surface of the frame and the front surface of the frame.
  • the hole that is not injected among the holes in the frame, including the third step of forming the potting material, is a method for manufacturing a display device that is a hole for removing air in the closed space in the second step.
  • a closed space is formed by the first step, but since the wall portion has elasticity, even if there is a curvature of the organic light emitting panel and a tolerance due to manufacturing, the organic light emitting panel and the organic light emitting panel It is possible to reliably form a closed space by absorbing the difference in spacing from the frame.
  • the precursor of the potting material can be poured into the closed space through the hole, and the potting material can be provided in the closed space. Since the precursor of the potting material is injected from the other holes, the air in the closed space can escape from one hole. Therefore, it is possible to prevent air from remaining in the closed space.
  • the potting material is provided in the closed space, the back surface of the organic light emitting panel and the frame can be connected by the potting material without a gap even if the organic light emitting panel is curved or there is a tolerance due to manufacturing. Since the frame and the potting material have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the frame to the external space. This makes it possible to manufacture a display device capable of efficiently dissipating heat from the organic light emitting panel.
  • the vehicle display device 10 of the first embodiment is installed on the dashboard of the vehicle and is configured as a device for displaying various information.
  • the vehicle display device 10 is arranged, for example, in a region located at the center in the vehicle width direction on the upper surface of the dashboard so that the display surface of the display faces the rear of the vehicle.
  • the vehicle display device 10 has a rectangular shape in the front view and a partially protruding shape in the rear view.
  • the vertical direction and the horizontal direction are set in advance on the vehicle display device 10.
  • the vehicle display device 10 is attached so that the vertical direction is substantially parallel to the vertical direction of the vehicle. Further, the vehicle display device 10 is attached so that the left-right direction is substantially parallel to the left-right direction of the vehicle, in other words, the vehicle width direction.
  • the vehicle display device 10 includes a display unit 11, a front panel 12, a rear panel 13, a housing frame 14, a board cover 15, a control unit 16, a potting material 17, and a sealer 18. It is composed.
  • the display unit 11 is a display device that displays an image. As shown in FIG. 5, the display unit 11 has a plate shape having a rectangular display surface. As shown in FIG. 10, the display unit 11 includes a touch unit 20, an organic light emitting panel 21, and a control board 22.
  • the organic light emitting panel 21 is also referred to as an organic EL panel or an organic light emitting diode (abbreviated as OLED), and may be hereinafter referred to as an organic EL panel 21.
  • the drive of the organic EL panel 21 is controlled by the control board 22.
  • the organic EL panel 21 has a flat plate shape and has a display surface on the front side for displaying an image.
  • the control board 22 is driven based on a control signal from the display controller mounted on the control unit 16 to control the display image.
  • the touch unit 20 is realized by a light-transmitting touch panel and allows a touch operation. It is attached to the front side of the organic EL panel 21 with an optical adhesive.
  • the control board 22 is provided on the back surface of the rear side of the organic EL panel 21.
  • the front panel 12 has a rectangular frame shape and is a portion that covers the outer periphery of the display unit 11 and forms a front design.
  • the front panel 12 is attached to the rear side of the organic EL panel 21 with an elastic adhesive as shown in FIG.
  • the housing frame 14 has a flat plate shape and is provided at intervals from the back surface on the rear side of the organic light emitting panel.
  • the housing frame 14 is a flat plate-shaped frame having thermal conductivity.
  • the flat plate shape also includes a flat plate shape and a curved plate shape.
  • the housing frame 14 is made of a material having excellent thermal conductivity, for example, an alloy containing aluminum or magnesium.
  • the housing frame 14 has a function of dissipating the heat of the organic EL panel 21 to the outside. As shown in FIG. 8, a plurality of holes 24 are formed in the housing frame 14.
  • the sealer 18 is provided so as to project from the front surface of the housing frame 14 on the side facing the back surface of the organic EL panel 21.
  • the sealer 18 has elasticity and comes into contact with the back surface of the organic EL panel 21 to maintain a distance between the back surface of the organic EL panel 21 and the front surface of the housing frame 14.
  • the sealer 18 forms a closed space 23 surrounded by the back surface of the organic EL panel 21 and the front surface of the housing frame 14.
  • the sealer 18 is also called a sealing material or a dam material and functions as a wall portion.
  • a rubber-based cushion, a urethane-based cushion, and a silicon-based gel are selected.
  • the potting material 17 is made of a material having thermal conductivity.
  • the potting material 17 is filled in the closed space 23 and provided so as to fill the closed space 23.
  • the potting material 17 thermally joins the organic EL panel 21 and the housing frame 14, and transfers the amount of heat of the organic EL panel 21 to the housing frame 14. Since the closed space 23 disappears when the closed space 23 is filled with the potting material 17, the portion filled with the potting material 17 is referred to as a closed portion.
  • the potting material 17 is preferably formed by curing a material having delayed curability.
  • the delayed curability is a property that does not cure immediately when injected into the closed space 23, but can start curing after flowing through the closed space 23 and filling the closed space 23. Therefore, it is desirable to have a delayed curing property in which curing is started several minutes after injection or curing is started by heat.
  • the potting material 17 is formed by curing a precursor having a low viscosity. If the potting material 17 has a high viscosity, it may stay in the closed space 23 without flowing to every corner. If the potting material 17 has a low viscosity, it can be spread to every corner of the closed space 23 when injected.
  • the low viscosity also depends on the injection pressure, and means the viscosity that can fill the closed space 23 to every corner when injected at the injection pressure adopted at the time of manufacture.
  • the potting material 17 is made of a resin material having thermal conductivity, delayed curability and low viscosity, for example, silicon.
  • liquid silicone grease is used as a precursor of the potting material 17.
  • the board cover 15 is provided on a part of the rear side of the housing frame 14, and is provided at a position of covering the control board 22.
  • the substrate cover 15 is formed with an opening for connecting.
  • the rear panel 13 has a rectangular frame shape and is a portion that covers the rear side of the housing frame 14 and forms a rear design.
  • the outer peripheral portion of the front surface of the rear panel 13 is fitted or joined to the front panel 12.
  • the rear panel 13 has an opening so that the substrate cover 15 is exposed.
  • the control unit 16 is provided in the opening portion of the rear panel 13.
  • the control unit 16 is electrically connected to the control board 22 through the opening of the board cover 15.
  • the control unit 16 has a rectangular parallelepiped shape and is a control unit that controls the display state of the organic EL panel 21.
  • the control unit 16 controls the image display of the organic EL panel 21 according to the image data for display, the operation state by the occupant, and the like.
  • the heat dissipation of the organic EL panel 21 will be described. Since the organic EL panel 21 emits light by itself, the entire display surface generates heat. Therefore, as a heat dissipation technique for the organic EL panel 21, for example, it is conceivable to provide a heat dissipation sheet on the back surface of the organic EL panel 21. However, in the case of the heat radiating sheet, the shape of the organic EL panel 21 may be flat, but if it is curved, there is a problem that the shape followability is poor and the assembling property is poor when the heat radiating sheet is sandwiched.
  • the heat radiating sheet if there is a dimensional tolerance, there is a possibility that a gap is partially formed with the back surface of the organic EL panel 21, and the heat radiating property is lowered by the air in the gap. In addition, it is difficult to sandwich the heat-dissipating sheet in a pressed state so as not to create a gap with the heat-dissipating sheet due to dimensional tolerances. Further, in order to improve the heat dissipation, the thickness of the heat dissipation sheet should be thin in order to reduce the thermal resistance, but in the case of the heat dissipation sheet, there are processing restrictions.
  • the potting material 17 is used instead of the heat radiating sheet.
  • the precursor of the potting material 17 is liquid, and the closed space 23 is filled in the liquid state. Therefore, the shape of the closed space 23 is excellent in followability. Further, it is possible to follow not only the shape of the organic EL panel 21 but also the variation in the distance between the organic EL panel 21 and the housing frame 14. Further, the potting material 17 can be made thinner to reduce the thermal resistance.
  • the display unit 11 is laminated on the housing frame 14.
  • the touch portion 20 is adhered to the surface of the organic EL panel 21 via the optical adhesive material 30.
  • An elastic adhesive 31 is applied to the periphery of the touch portion 20.
  • the touch portion 20 is adhered to the front panel 12 with an elastic adhesive 31.
  • the precursor of the potting material 17 is injected using the hole 24 of the housing frame 14.
  • a plurality of holes 24 and nine holes 24 are formed in the housing frame 14, but the precursor is not injected from all the holes 24.
  • the precursor is injected through the other injection holes 24 except for at least one air bleeding hole 24 in the housing frame 14.
  • the holes 24 for bleeding air that are not injected are holes 24 for removing air from the closed space 23. If the precursor is injected into all the holes 24, air may remain inside the closed space 23. Therefore, by leaving at least one air vent hole 24, air can be released to the outside and the closed space 23 can be filled with the precursor.
  • the precursor hardens over time to form the potting material 17. After that, or at the timing of curing, as shown in FIG. 10 (3), the main part of the vehicle display device 10 is completed by assembling the residual panel 13 and the like.
  • housing frames 14 are provided at intervals on the back surface of the organic light emitting panel.
  • the closed portion between the organic light emitting panel and the housing frame 14 is filled with the potting material 17. Since the housing frame 14 is formed with a plurality of holes 24 communicating with the closed portion, the precursor of the potting material 17 is poured from the holes 24 into the closed space 23 after the housing frame 14 is assembled to the organic light emitting panel. Therefore, the potting material 17 can be provided in the closed space 23. As a result, even if the organic light emitting panel is curved or there is a dimensional tolerance due to manufacturing, the back surface of the organic light emitting panel and the housing frame 14 can be connected by the potting material 17 without a gap.
  • the sealer 18 since the sealer 18 has elasticity, the closed space 23 can be formed by absorbing the difference in the distance between the organic light emitting panel and the housing frame 14 due to the curvature and the dimensional tolerance. Since the housing frame 14 and the potting material 17 have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the housing frame 14 to the external space. As a result, the organic light emitting panel can efficiently dissipate heat.
  • the organic EL panel 21 is thin like a film, it is easy to make it thin, and it is suitable for making a curved surface. Furthermore, because it is lightweight, it has the advantage of being easy to increase in size. However, there is a disadvantage that the entire display surface emits light to generate heat, and it is necessary to ensure heat dissipation. However, in the present embodiment, as described above, the closed space 23 is filled with the potting material 17 to realize a heat dissipation structure, so that heat can be reliably dissipated even if the size is increased or the surface is curved.
  • the first step of assembling the organic light emitting panel and the housing frame 14 to form the closed space 23 and the potting material from the hole 24 of the housing frame 14 It includes a second step of injecting the precursor of 17 and a third step of curing the precursor to form the potting material 17.
  • the closed space 23 is formed by the first step shown in FIG. 10 (1), but since the sealer 18 has elasticity, the organic light emitting panel and the frame can be connected to each other even if there are tolerances due to the curvature and manufacturing of the organic light emitting panel.
  • the closed space 23 can be reliably formed by absorbing the difference in spacing.
  • the precursor of the potting material 17 is poured from the injection hole 24 into the closed space 23 to pour the potting material 17 into the closed space 23. It can be provided in the closed space 23. Since the precursor of the potting material 17 is injected from the injection hole 24, the air in the closed space 23 can escape from the air bleeding hole 24. Therefore, it is possible to prevent air from remaining in the closed space 23. Further, since the potting material 17 is provided in the closed space 23, even if the organic light emitting panel is curved or there is a dimensional tolerance due to manufacturing, the back surface of the organic light emitting panel and the housing frame 14 are connected by the potting material 17 without a gap. be able to.
  • the housing frame 14 and the potting material 17 have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the housing frame 14 to the external space. This makes it possible to manufacture a vehicle display device 10 capable of efficiently dissipating heat from the organic light emitting panel.
  • the potting material 17 is formed by curing a material having delayed curability.
  • the delayed curability may be a thermosetting that not only cures over time but also cures by heating, or may be a material that hardens with ultraviolet rays, humidity, and two liquids.
  • a precursor having a low viscosity is cured and formed.
  • the housing frame 14 is made of a metal material. As a result, even the potting material 17 that requires heating for curing can be reliably cured by heating the housing frame 14, and curing can be accelerated.
  • the potting material 17 and the two-component curing type can also be used, and in the case of the one-component curing type heating type, curing can be promoted by heating the housing frame 14 as described above. Further, by providing a plurality of holes 24 in the housing frame 14, the filling location and filling speed can be controlled. As a result, the degree of freedom in design on the assembly equipment side can be improved.
  • the potting material 17 is provided over almost the entire back surface of the organic EL panel 21.
  • the housing frame 14 also has an area of substantially the same surface as the back surface of the organic EL panel 21, and the potting material 17 is provided. Therefore, it is possible to secure a heat dissipation area over a wide area on the back surface of the organic EL panel 21. Thereby, the cooling performance can be improved.
  • the sealer 18 is provided. Since the sealer 18 is added to the entire circumference of the housing frame 14 as shown in FIG. 7, the adhesion to the organic EL panel 21 can be improved. Thereby, the filling work of the potting material 17 can be easily realized.
  • the display device is realized for a vehicle, but the display device is not limited to the vehicle and may be used for other purposes.
  • the display unit 11 also has a function as a touch panel, but may be a display device having no touch panel function. Further, although the display unit 11 has a configuration having an organic EL panel 21, another display method, for example, a liquid crystal display panel may be used.
  • the sealer 18 is provided on the entire circumference of the housing frame 14, but is not limited to such a configuration.
  • the sealer 18 may be provided by dividing the grid into strips.
  • the potting material 17 can be filled in the divided closed space 23 by providing the hole 24 in the housing frame 14 so as to correspond to the divided portion.
  • the housing frame 14 and the front panel 12 are separate bodies, but they may be integrated.
  • the touch portion 20 needs to be fixed to the housing frame 14, but the sealer 18 may function as an adhesive, that is, the sealer 18 may have the function of the elastic adhesive 31.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

A display device (10) for vehicle is provided with a housing frame (14) spaced apart from a back face of an organic electro luminescence panel. An occluded portion between the organic electro luminescence panel and the housing frame (14) is filled with a potting material (17). A plurality of holes (24) in communication with the occluded portion are formed in the housing frame (14). Thus, after the housing frame (14) is mounted to the organic electro luminescence panel, the potting material (17) can be provided in an occluded space (23) by pouring a precursor of the potting material (17) from the holes (24) to the occluded space (23). The housing frame (14) and the potting material (17) have thermal conductivity and can therefore transfer heat of the organic electro luminescence panel and dissipate the heat from the housing frame (14) to an external space.

Description

表示装置および表示装置の製造方法Display device and manufacturing method of display device 関連出願の相互参照Cross-reference of related applications
　この出願は、２０２０年０４月１５日に日本に出願された特許出願第２０２０－０７３０５２号を基礎としており、基礎の出願の内容を、全体的に、参照により援用している。 This application is based on Patent Application No. 2020-073052 filed in Japan on April 15, 2020, and the contents of the basic application are incorporated by reference as a whole.
　この明細書における開示は、有機発光（Electro Luminescence：略称ＥＬ）パネルを有する表示装置および表示装置の製造方法に関する。 The disclosure in this specification relates to a display device having an organic emission (Electro Luminescence: abbreviated as EL) panel and a method for manufacturing the display device.
　特許文献１に記載の車両用表示装置は、ケース内に表示パネルを収納し、有機ＥＬパネルの前側には透光性保護パネルが設けられている。そして透光性保護パネルと表示パネルとの間に透光性部材を設けている。 The vehicle display device described in Patent Document 1 has a display panel housed in a case, and a translucent protective panel is provided on the front side of the organic EL panel. A translucent member is provided between the translucent protective panel and the display panel.
特開２０１８－１９４６７４号公報JP-A-2018-194674
　有機ＥＬパネルは、液晶表示パネルと異なり、自発光のため表示部全域が発熱する。車両に搭載する場合など高温になりやすい環境では、有機ＥＬパネルを効率よく放熱して冷却する必要がある。 Unlike the liquid crystal display panel, the organic EL panel generates heat in the entire display unit because it emits light by itself. In an environment where the temperature tends to be high, such as when mounted on a vehicle, it is necessary to efficiently dissipate heat and cool the organic EL panel.
　そこで、開示される目的は前述の問題点を鑑みてなされたものであり、有機発光パネルの放熱を促進することができる表示装置および表示装置の製造方法を提供することを目的とする。 Therefore, the purpose of disclosure is made in view of the above-mentioned problems, and an object of the present invention is to provide a display device capable of promoting heat dissipation of the organic light emitting panel and a method for manufacturing the display device.
　本開示は前述の目的を達成するために以下の技術的手段を採用する。 This disclosure employs the following technical means to achieve the above objectives.
　ここに開示された表示装置は、画像を表示する表示面を有する有機発光パネルと、表示面とは反対側の裏面から間隔をあけて設けられ、熱伝導性を有する平板状のフレームと、有機発光パネルの裏面と対向する側のフレームの表面から突出するように設けられ、弾力性を有し、有機発光パネルの裏面と接触して、有機発光パネルの裏面とフレームの表面との間隔を維持する壁部と、壁部と有機発光パネルの裏面とフレームの表面とに囲まれた閉塞部分に充填され、熱伝導性を有するポッティング材と、有し、フレームには、閉塞部分に連通する複数の穴が形成されている表示装置である。 The display device disclosed here includes an organic light emitting panel having a display surface for displaying an image, a flat plate-shaped frame provided at intervals from the back surface opposite to the display surface, and having thermal conductivity, and an organic. It is provided so as to protrude from the front surface of the frame on the side facing the back surface of the light emitting panel, has elasticity, and contacts the back surface of the organic light emitting panel to maintain the distance between the back surface of the organic light emitting panel and the front surface of the frame. A plurality of potting materials that are filled in a closed portion surrounded by a wall portion, a wall portion, the back surface of the organic light emitting panel, and the front surface of the frame and have thermal conductivity, and the frame communicates with the closed portion. It is a display device in which a hole is formed.
　このような表示装置に従えば、有機発光パネルの裏面には間隔をあけてフレームが設けられる。そして有機発光パネルとフレームとの間の閉塞部分には、ポッティング材が充填されている。フレームには閉塞部分に連通する複数の穴が形成されているので、フレームを有機発光パネルに組み付けた後に、ポッティング材の前駆体を穴から閉塞空間に流し込んで、ポッティング材を閉塞空間に設けることができる。これによって有機発光パネルが湾曲していたり、製造による公差があっても、隙間なく有機発光パネルの裏面とフレームとをポッティング材で接続することができる。また壁部は弾力性を有するので、有機発光パネルとフレームとの湾曲および公差による間隔の違いを吸収して、閉塞空間を形成することができる。そしてフレームとポッティング材は熱伝導性を有するので、有機発光パネルの熱を伝えてフレームから外部空間に放熱することができる。これによって有機発光パネルを効率よく放熱することができる。 According to such a display device, frames are provided at intervals on the back surface of the organic light emitting panel. The closed portion between the organic light emitting panel and the frame is filled with a potting material. Since the frame has a plurality of holes communicating with the closed portion, after assembling the frame to the organic light emitting panel, the precursor of the potting material is poured from the holes into the closed space to provide the potting material in the closed space. Can be done. As a result, even if the organic light emitting panel is curved or there is a tolerance due to manufacturing, the back surface of the organic light emitting panel and the frame can be connected by a potting material without a gap. Further, since the wall portion has elasticity, it is possible to form a closed space by absorbing the difference in the distance between the organic light emitting panel and the frame due to the curvature and the tolerance. Since the frame and the potting material have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the frame to the external space. As a result, the organic light emitting panel can efficiently dissipate heat.
　また開示された表示装置の製造方法は、画像を表示する表示面を有する有機発光パネルと、表示面とは反対側の裏面に間隔をあけて設けられ、複数の穴が形成されており、熱伝導性を有する平板状のフレームと、有機発光パネルの裏面と対向する側のフレームの表面から突出するように設けられ、弾力性を有し、有機発光パネルの裏面と接触して、有機発光パネルの裏面とフレームの表面との間隔を維持する壁部と、を有する表示装置の製造方法であって、有機発光パネルとフレームとを組み付けて、壁部と有機発光パネルの裏面とフレームの表面とに囲まれた閉塞空間を形成する第１工程と、フレームの少なくとも１つの穴を除いた他の穴から熱伝導性を有するポッティング材の前駆体を注入する第２工程と、前駆体を硬化してポッティング材を形成する第３工程と、を含み、フレームの穴のうち注入されない穴は、第２工程で、閉塞空間の空気を除去するための穴である表示装置の製造方法である。 Further, in the disclosed manufacturing method of the display device, an organic light emitting panel having a display surface for displaying an image and a back surface opposite to the display surface are provided at intervals, and a plurality of holes are formed to form heat. The organic light emitting panel is provided so as to project from the front surface of the frame on the side facing the back surface of the organic light emitting panel and the flat frame having conductivity, and has elasticity and comes into contact with the back surface of the organic light emitting panel. It is a method of manufacturing a display device having a wall portion that maintains a distance between the back surface of the frame and the front surface of the frame. The first step of forming a closed space surrounded by the frame, the second step of injecting a precursor of a potting material having thermal conductivity from other holes except at least one hole of the frame, and curing the precursor. The hole that is not injected among the holes in the frame, including the third step of forming the potting material, is a method for manufacturing a display device that is a hole for removing air in the closed space in the second step.
　このような表示装置の製造方法に従えば、第１行程によって閉塞空間を形成するが、壁部は弾力性を有するので、有機発光パネルの湾曲および製造による公差があっても、有機発光パネルとフレームとの間隔の違いを吸収して、確実に閉塞空間を形成することができる。そして第２工程および第３工程によって、ポッティング材の前駆体を穴から閉塞空間に流し込んで、ポッティング材を閉塞空間に設けることができる。他の穴からポッティング材の前駆体を注入するので、１つの穴から閉塞空間の空気を逃すことができる。したがって閉塞空間に空気が残留することを抑制することができる。また閉塞空間にポッティング材を設けるので、有機発光パネルが湾曲していたり、製造による公差があっても、隙間なく有機発光パネルの裏面とフレームとをポッティング材で接続することができる。そしてフレームとポッティング材は熱伝導性を有するので、有機発光パネルの熱を伝えてフレームから外部空間に放熱することができる。これによって有機発光パネルを効率よく放熱することができる表示装置を製造することができる。 According to the manufacturing method of such a display device, a closed space is formed by the first step, but since the wall portion has elasticity, even if there is a curvature of the organic light emitting panel and a tolerance due to manufacturing, the organic light emitting panel and the organic light emitting panel It is possible to reliably form a closed space by absorbing the difference in spacing from the frame. Then, in the second step and the third step, the precursor of the potting material can be poured into the closed space through the hole, and the potting material can be provided in the closed space. Since the precursor of the potting material is injected from the other holes, the air in the closed space can escape from one hole. Therefore, it is possible to prevent air from remaining in the closed space. Further, since the potting material is provided in the closed space, the back surface of the organic light emitting panel and the frame can be connected by the potting material without a gap even if the organic light emitting panel is curved or there is a tolerance due to manufacturing. Since the frame and the potting material have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the frame to the external space. This makes it possible to manufacture a display device capable of efficiently dissipating heat from the organic light emitting panel.
　なお、前述の各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示す一例である。 Note that the reference numerals in parentheses of the above-mentioned means are examples showing the correspondence with the specific means described in the embodiments described later.
正面側から見た車両用表示装置の斜視図。A perspective view of the vehicle display device seen from the front side. 背面側から見た車両用表示装置の斜視図。A perspective view of the vehicle display device seen from the rear side. 正面側から見た車両用表示装置の分解斜視図。An exploded perspective view of the vehicle display device viewed from the front side. 背面側から見た車両用表示装置の分解斜視図。An exploded perspective view of the vehicle display device seen from the rear side. 正面側から見た表示部の斜視図。A perspective view of the display unit as viewed from the front side. 背面側から見た表示部の斜視図。A perspective view of the display unit as viewed from the back side. 筐体フレームの一部を拡大して示す斜視図。The perspective view which shows a part of the housing frame enlarged. 筐体フレームの一部を拡大して示す斜視図。The perspective view which shows a part of the housing frame enlarged. 表示部の組付け工程を示す斜視図。The perspective view which shows the assembly process of a display part. 製造方法の工程を示す断面図。The cross-sectional view which shows the process of the manufacturing method.
　（第１実施形態）
　本開示の第１実施形態に関して、図１～図１０を用いて説明する。第１実施形態の車両用表示装置１０は、車両のダッシュボードに設置されて、種々の情報を表示する装置として構成されている。車両用表示装置１０は、たとえばダッシュボードの上面部において車幅方向中央部に位置する領域に、ディスプレイの表示面が車両後方に向いた姿勢で配置されている。車両用表示装置１０は、図１および図２に示すように、正面視では長方形状であり、背面視では一部が部分てきに突出した形状である。 (First Embodiment)
The first embodiment of the present disclosure will be described with reference to FIGS. 1 to 10. The vehicle display device 10 of the first embodiment is installed on the dashboard of the vehicle and is configured as a device for displaying various information. The vehicle display device 10 is arranged, for example, in a region located at the center in the vehicle width direction on the upper surface of the dashboard so that the display surface of the display faces the rear of the vehicle. As shown in FIGS. 1 and 2, the vehicle display device 10 has a rectangular shape in the front view and a partially protruding shape in the rear view.
　車両用表示装置１０には、予め上下方向と左右方向とが設定されている。車両用表示装置１０は、上下方向が車両の上下方向に略平行となるように取り付けられている。また、車両用表示装置１０は、左右方向が車両の左右方向、換言すれば車幅方向に略平行となるように取り付けられている。 The vertical direction and the horizontal direction are set in advance on the vehicle display device 10. The vehicle display device 10 is attached so that the vertical direction is substantially parallel to the vertical direction of the vehicle. Further, the vehicle display device 10 is attached so that the left-right direction is substantially parallel to the left-right direction of the vehicle, in other words, the vehicle width direction.
　車両用表示装置１０は、図３および図４に示すように、表示部１１、フロントパネル１２、リアパネル１３、筐体フレーム１４、基板カバー１５、制御ユニット１６、ポッティング材１７およびシーラー１８を含んで構成される。 As shown in FIGS. 3 and 4, the vehicle display device 10 includes a display unit 11, a front panel 12, a rear panel 13, a housing frame 14, a board cover 15, a control unit 16, a potting material 17, and a sealer 18. It is composed.
　表示部１１は、画像を表示する表示装置である。表示部１１は、図５に示すように、長方形の表示面を有する板状である。表示部１１は、図１０に示すように、タッチ部２０、有機発光パネル２１および制御基板２２を含んで構成される。有機発光パネル２１は、有機ＥＬパネルまたは有機発光デバイス（an organic light emitting diode：略称ＯＬＥＤ）ともいい、以下、有機ＥＬパネル２１ということがある。 The display unit 11 is a display device that displays an image. As shown in FIG. 5, the display unit 11 has a plate shape having a rectangular display surface. As shown in FIG. 10, the display unit 11 includes a touch unit 20, an organic light emitting panel 21, and a control board 22. The organic light emitting panel 21 is also referred to as an organic EL panel or an organic light emitting diode (abbreviated as OLED), and may be hereinafter referred to as an organic EL panel 21.
　有機ＥＬパネル２１は、制御基板２２によって駆動が制御される。有機ＥＬパネル２１は、平板状であり、画像を表示する前側に表示面を有する。制御基板２２は、制御ユニット１６に搭載されているディスプレイコントローラからの制御信号に基づいて駆動し、表示画像を制御する。タッチ部２０は、透光性を有するタッチパネルによって実現され、タッチ操作を許容する。有機ＥＬパネル２１の前側に光学接着剤によって貼り付けられている。制御基板２２は、有機ＥＬパネル２１の後側の裏面に設けられる。 The drive of the organic EL panel 21 is controlled by the control board 22. The organic EL panel 21 has a flat plate shape and has a display surface on the front side for displaying an image. The control board 22 is driven based on a control signal from the display controller mounted on the control unit 16 to control the display image. The touch unit 20 is realized by a light-transmitting touch panel and allows a touch operation. It is attached to the front side of the organic EL panel 21 with an optical adhesive. The control board 22 is provided on the back surface of the rear side of the organic EL panel 21.
　フロントパネル１２は、長方形枠状であり、表示部１１の外周を覆い、フロント意匠を形成する部分である。フロントパネル１２は、有機ＥＬパネル２１の後側に図１０に示すように弾性接着材によって貼り付けられている。 The front panel 12 has a rectangular frame shape and is a portion that covers the outer periphery of the display unit 11 and forms a front design. The front panel 12 is attached to the rear side of the organic EL panel 21 with an elastic adhesive as shown in FIG.
　筐体フレーム１４は、図６に示すように、平板状であり、有機発光パネルの後側の裏面から間隔をあけて設けられる。筐体フレーム１４は、熱伝導性を有する平板状のフレームである。平板状は、平らな板状および湾曲した板状も含む。筐体フレーム１４は、熱伝導性に優れる材料、たとえばアルミニウムまたはマグネシウムを含む合金からなる。筐体フレーム１４は、有機ＥＬパネル２１の熱を外部に放熱する機能を有する。筐体フレーム１４には、図８に示すように、複数の穴２４が形成されている。 As shown in FIG. 6, the housing frame 14 has a flat plate shape and is provided at intervals from the back surface on the rear side of the organic light emitting panel. The housing frame 14 is a flat plate-shaped frame having thermal conductivity. The flat plate shape also includes a flat plate shape and a curved plate shape. The housing frame 14 is made of a material having excellent thermal conductivity, for example, an alloy containing aluminum or magnesium. The housing frame 14 has a function of dissipating the heat of the organic EL panel 21 to the outside. As shown in FIG. 8, a plurality of holes 24 are formed in the housing frame 14.
　シーラー１８は、図７および図１０に示すように、有機ＥＬパネル２１の裏面と対向する側の筐体フレーム１４の表面から突出するように設けられる。シーラー１８は、弾力性を有し、有機ＥＬパネル２１の裏面と接触して、有機ＥＬパネル２１の裏面と筐体フレーム１４の表面との間隔を維持する。シーラー１８は、有機ＥＬパネル２１の裏面と筐体フレーム１４の表面とに囲まれた閉塞空間２３を形成する。シーラー１８は、シーリング材またはダム材とも呼ばれ、壁部として機能する。シーラー１８の材料としては、たとえばゴム系、ウレタン系クッションおよびシリコン系ゲルが選択される。 As shown in FIGS. 7 and 10, the sealer 18 is provided so as to project from the front surface of the housing frame 14 on the side facing the back surface of the organic EL panel 21. The sealer 18 has elasticity and comes into contact with the back surface of the organic EL panel 21 to maintain a distance between the back surface of the organic EL panel 21 and the front surface of the housing frame 14. The sealer 18 forms a closed space 23 surrounded by the back surface of the organic EL panel 21 and the front surface of the housing frame 14. The sealer 18 is also called a sealing material or a dam material and functions as a wall portion. As the material of the sealer 18, for example, a rubber-based cushion, a urethane-based cushion, and a silicon-based gel are selected.
　ポッティング材１７は、熱伝導性を有する材料からなる。ポッティング材１７は、閉塞空間２３に充填されて、閉塞空間２３を満たすように設けられる。ポッティング材１７は、有機ＥＬパネル２１と筐体フレーム１４とを熱的に接合し、有機ＥＬパネル２１の熱量を筐体フレーム１４に伝熱する。閉塞空間２３は、ポッティング材１７で充填されると閉塞空間２３がなくなるので、ポッティング材１７で充填された部分を閉塞部分と称する。 The potting material 17 is made of a material having thermal conductivity. The potting material 17 is filled in the closed space 23 and provided so as to fill the closed space 23. The potting material 17 thermally joins the organic EL panel 21 and the housing frame 14, and transfers the amount of heat of the organic EL panel 21 to the housing frame 14. Since the closed space 23 disappears when the closed space 23 is filled with the potting material 17, the portion filled with the potting material 17 is referred to as a closed portion.
　ポッティング材１７は、好ましくは遅延硬化性を有する材料が硬化して形成される。遅延硬化性とは、閉塞空間２３に注入したときに直ちに硬化することなく、閉塞空間２３を流れて閉塞空間２３を充填した後に硬化が開始可能な性質のことである。したがって注入後、数分後から硬化を開始したり、熱によって硬化が開始したりする遅延硬化性であることが望ましい。 The potting material 17 is preferably formed by curing a material having delayed curability. The delayed curability is a property that does not cure immediately when injected into the closed space 23, but can start curing after flowing through the closed space 23 and filling the closed space 23. Therefore, it is desirable to have a delayed curing property in which curing is started several minutes after injection or curing is started by heat.
　またポッティング材１７は、低粘度を有する前駆体が硬化して形成されている。ポッティング材１７が高粘度であると、閉塞空間２３の隅々まで流れることなく留まるおそれがある。ポッティング材１７が低粘度であると、注入したときに閉塞空間２３の隅々まで行き渡らせることができる。低粘度は、注入圧力にも依存し、製造時に採用された注入圧力で注入したときに閉塞空間２３を隅々まで充填できる粘性を意味する。 Further, the potting material 17 is formed by curing a precursor having a low viscosity. If the potting material 17 has a high viscosity, it may stay in the closed space 23 without flowing to every corner. If the potting material 17 has a low viscosity, it can be spread to every corner of the closed space 23 when injected. The low viscosity also depends on the injection pressure, and means the viscosity that can fill the closed space 23 to every corner when injected at the injection pressure adopted at the time of manufacture.
　ポッティング材１７は、熱伝導性、遅延硬化性および低粘度を有する樹脂材料、たとえばシリコンからなる。この場合、ポッティング材１７の前駆体として、液体状のシリコングリースが用いられることになる。 The potting material 17 is made of a resin material having thermal conductivity, delayed curability and low viscosity, for example, silicon. In this case, liquid silicone grease is used as a precursor of the potting material 17.
　基板カバー１５は、筐体フレーム１４の後側の一部に設けられ、制御基板２２を覆う位置に設けられる。基板カバー１５は、接続するための開口が形成されている。 The board cover 15 is provided on a part of the rear side of the housing frame 14, and is provided at a position of covering the control board 22. The substrate cover 15 is formed with an opening for connecting.
　リアパネル１３は、長方形枠状であり、筐体フレーム１４の後側を覆い、リア意匠を形成する部分である。リアパネル１３の前面の外周部分は、フロントパネル１２に嵌合または接合される。リアパネル１３は、基板カバー１５が露出するように開口を有する。 The rear panel 13 has a rectangular frame shape and is a portion that covers the rear side of the housing frame 14 and forms a rear design. The outer peripheral portion of the front surface of the rear panel 13 is fitted or joined to the front panel 12. The rear panel 13 has an opening so that the substrate cover 15 is exposed.
　制御ユニット１６は、リアパネル１３の開口部分に設けられる。制御ユニット１６は、基板カバー１５の開口を介して、制御基板２２に電気的に接続される。制御ユニット１６は、直方体の箱状を成して、有機ＥＬパネル２１の表示状態を制御する制御部となっている。制御ユニット１６は、表示用の画像データ、および乗員による操作状態等に応じて、有機ＥＬパネル２１の画像表示を制御するようになっている。 The control unit 16 is provided in the opening portion of the rear panel 13. The control unit 16 is electrically connected to the control board 22 through the opening of the board cover 15. The control unit 16 has a rectangular parallelepiped shape and is a control unit that controls the display state of the organic EL panel 21. The control unit 16 controls the image display of the organic EL panel 21 according to the image data for display, the operation state by the occupant, and the like.
　次に、有機ＥＬパネル２１の放熱に関して説明する。有機ＥＬパネル２１は、自発光のため、表示面の全域が発熱する。そこで有機ＥＬパネル２１の放熱技術として、たとえば有機ＥＬパネル２１の裏面に放熱シートを設けることが考えられる。しかし放熱シートの場合、有機ＥＬパネル２１の形状が平板状であればよいが、曲面になると放熱シートの挟み込みでは形状の追従性が悪く、また組付け性が悪いという問題がある。さらに放熱シートであると、寸法公差がある場合に有機ＥＬパネル２１の裏面と部分的に隙間が生じるおそれがあり、隙間の空気によって放熱性が低下する。また放熱シートとの隙間が生じないように押圧した状態で挟みこむことも寸法公差もあり困難である。また放熱性を向上させるためには、熱抵抗を下げるために放熱シートの厚みは薄い方がよいが、放熱シートの場合は加工上の制約がある。 Next, the heat dissipation of the organic EL panel 21 will be described. Since the organic EL panel 21 emits light by itself, the entire display surface generates heat. Therefore, as a heat dissipation technique for the organic EL panel 21, for example, it is conceivable to provide a heat dissipation sheet on the back surface of the organic EL panel 21. However, in the case of the heat radiating sheet, the shape of the organic EL panel 21 may be flat, but if it is curved, there is a problem that the shape followability is poor and the assembling property is poor when the heat radiating sheet is sandwiched. Further, in the case of the heat radiating sheet, if there is a dimensional tolerance, there is a possibility that a gap is partially formed with the back surface of the organic EL panel 21, and the heat radiating property is lowered by the air in the gap. In addition, it is difficult to sandwich the heat-dissipating sheet in a pressed state so as not to create a gap with the heat-dissipating sheet due to dimensional tolerances. Further, in order to improve the heat dissipation, the thickness of the heat dissipation sheet should be thin in order to reduce the thermal resistance, but in the case of the heat dissipation sheet, there are processing restrictions.
　そこで本実施形態では、放熱シートではなくポッティング材１７を用いている。ポッティング材１７は、前駆体は液状であり、液状の状態で閉塞空間２３に充填する。したがって閉塞空間２３の形状の追従性に優れる。また有機ＥＬパネル２１の形状だけでなく、有機ＥＬパネル２１と筐体フレーム１４の間隔のばらつきにも追従することができる。またポッティング材１７であれば薄くして、熱抵抗を小さくすることができる。 Therefore, in this embodiment, the potting material 17 is used instead of the heat radiating sheet. The precursor of the potting material 17 is liquid, and the closed space 23 is filled in the liquid state. Therefore, the shape of the closed space 23 is excellent in followability. Further, it is possible to follow not only the shape of the organic EL panel 21 but also the variation in the distance between the organic EL panel 21 and the housing frame 14. Further, the potting material 17 can be made thinner to reduce the thermal resistance.
　次に、具体的な製造方法に関して図９および図１０を用いて説明する。図９および図１０の（１）に示すように、表示部１１を筐体フレーム１４に積層する。有機ＥＬパネル２１は表面に光学接着材３０を介してタッチ部２０が接着されている。またタッチ部２０は、弾性接着材３１が周囲に塗布されている。タッチ部２０は、フロントパネル１２に弾性接着材３１で接着される。表示部１１が筐体フレーム１４に組み付けられると、有機ＥＬパネル２１の裏面は、シーラー１８の先端部に弾力的に接触する。そして図１０の（２）に示すように、有機ＥＬパネル２１の裏面と筐体フレーム１４の表面とシーラー１８とに囲まれた閉塞空間２３が形成される。 Next, a specific manufacturing method will be described with reference to FIGS. 9 and 10. As shown in FIG. 9 and FIG. 10 (1), the display unit 11 is laminated on the housing frame 14. The touch portion 20 is adhered to the surface of the organic EL panel 21 via the optical adhesive material 30. An elastic adhesive 31 is applied to the periphery of the touch portion 20. The touch portion 20 is adhered to the front panel 12 with an elastic adhesive 31. When the display unit 11 is assembled to the housing frame 14, the back surface of the organic EL panel 21 elastically contacts the tip end portion of the sealer 18. Then, as shown in FIG. 10 (2), a closed space 23 surrounded by the back surface of the organic EL panel 21, the front surface of the housing frame 14, and the sealer 18 is formed.
　そして図１０の（２）に示すように、筐体フレーム１４の穴２４を用いて、ポッティング材１７の前駆体を注入する。図８および図９に示すように、筐体フレーム１４には複数の穴２４、本実施形態では９個の穴２４が形成されているが、全ての穴２４から前駆体を注入しない。筐体フレーム１４の少なくとも１つの空気抜き用の穴２４を除いた他の注入用の穴２４から前駆体を注入する。筐体フレーム１４の穴２４のうち注入されない空気抜き用の穴２４は、閉塞空間２３の空気を除去するための穴２４である。全ての穴２４に前駆体を注入すると、閉塞空間２３の内部に空気が残留するおそれがある。そこで少なくとも１つの空気抜き用の穴２４を残すことによって、空気を外部に逃して、閉塞空間２３を前駆体で満たすことができる。 Then, as shown in (2) of FIG. 10, the precursor of the potting material 17 is injected using the hole 24 of the housing frame 14. As shown in FIGS. 8 and 9, a plurality of holes 24 and nine holes 24 are formed in the housing frame 14, but the precursor is not injected from all the holes 24. The precursor is injected through the other injection holes 24 except for at least one air bleeding hole 24 in the housing frame 14. Of the holes 24 of the housing frame 14, the holes 24 for bleeding air that are not injected are holes 24 for removing air from the closed space 23. If the precursor is injected into all the holes 24, air may remain inside the closed space 23. Therefore, by leaving at least one air vent hole 24, air can be released to the outside and the closed space 23 can be filled with the precursor.
　そして前駆体を注入した後は、時間が経過すると前駆体が硬化してポッティング材１７を形成する。その後または硬化中のタイミングで、図１０の（３）に示すように、リアパネル１３など残余の組み付けることで車両用表示装置１０の主な部分が完成する。 Then, after injecting the precursor, the precursor hardens over time to form the potting material 17. After that, or at the timing of curing, as shown in FIG. 10 (3), the main part of the vehicle display device 10 is completed by assembling the residual panel 13 and the like.
　以上説明したように本実施形態の車両用表示装置１０は、有機発光パネルの裏面には間隔をあけて筐体フレーム１４が設けられる。そして有機発光パネルと筐体フレーム１４との間の閉塞部分には、ポッティング材１７が充填されている。筐体フレーム１４には閉塞部分に連通する複数の穴２４が形成されているので、筐体フレーム１４を有機発光パネルに組み付けた後に、ポッティング材１７の前駆体を穴２４から閉塞空間２３に流し込んで、ポッティング材１７を閉塞空間２３に設けることができる。これによって有機発光パネルが湾曲していたり、製造による寸法公差があっても、隙間なく有機発光パネルの裏面と筐体フレーム１４とをポッティング材１７で接続することができる。またシーラー１８は弾力性を有するので、有機発光パネルと筐体フレーム１４との湾曲および寸法公差による間隔の違いを吸収して、閉塞空間２３を形成することができる。そして筐体フレーム１４とポッティング材１７は熱伝導性を有するので、有機発光パネルの熱を伝えて筐体フレーム１４から外部空間に放熱することができる。これによって有機発光パネルを効率よく放熱することができる。 As described above, in the vehicle display device 10 of the present embodiment, housing frames 14 are provided at intervals on the back surface of the organic light emitting panel. The closed portion between the organic light emitting panel and the housing frame 14 is filled with the potting material 17. Since the housing frame 14 is formed with a plurality of holes 24 communicating with the closed portion, the precursor of the potting material 17 is poured from the holes 24 into the closed space 23 after the housing frame 14 is assembled to the organic light emitting panel. Therefore, the potting material 17 can be provided in the closed space 23. As a result, even if the organic light emitting panel is curved or there is a dimensional tolerance due to manufacturing, the back surface of the organic light emitting panel and the housing frame 14 can be connected by the potting material 17 without a gap. Further, since the sealer 18 has elasticity, the closed space 23 can be formed by absorbing the difference in the distance between the organic light emitting panel and the housing frame 14 due to the curvature and the dimensional tolerance. Since the housing frame 14 and the potting material 17 have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the housing frame 14 to the external space. As a result, the organic light emitting panel can efficiently dissipate heat.
　有機ＥＬパネル２１は、フィルム状の薄さであるため薄型化しやすく、また曲面化に適している。さらに軽量であるため、大型化しやすいという長所がある。しかし、表示面の全域が発光して発熱し、放熱性を確保する必要があるという短所がある。しかし本実施形態では、前述のように閉塞空間２３にポッティング材１７を充填して放熱構造を実現しているので、大型化および曲面化しても確実に放熱させることができる。 Since the organic EL panel 21 is thin like a film, it is easy to make it thin, and it is suitable for making a curved surface. Furthermore, because it is lightweight, it has the advantage of being easy to increase in size. However, there is a disadvantage that the entire display surface emits light to generate heat, and it is necessary to ensure heat dissipation. However, in the present embodiment, as described above, the closed space 23 is filled with the potting material 17 to realize a heat dissipation structure, so that heat can be reliably dissipated even if the size is increased or the surface is curved.
　また本実施形態の車両用表示装置１０の製造方法に従えば、有機発光パネルと筐体フレーム１４とを組み付けて閉塞空間２３を形成する第１工程と、筐体フレーム１４の穴２４からポッティング材１７の前駆体を注入する第２工程と、前駆体を硬化してポッティング材１７を形成する第３工程とを含む。図１０の（１）に示す第１行程によって閉塞空間２３を形成するが、シーラー１８は弾力性を有するので、有機発光パネルの湾曲および製造による公差があっても、有機発光パネルとフレームとの間隔の違いを吸収して、確実に閉塞空間２３を形成することができる。そして図１０の（２）に示す第２工程および図１０の（３）に示す第３工程によって、ポッティング材１７の前駆体を注入用の穴２４から閉塞空間２３に流し込んで、ポッティング材１７を閉塞空間２３に設けることができる。注入用の穴２４からポッティング材１７の前駆体を注入するので、空気抜き用の穴２４から閉塞空間２３の空気を逃すことができる。したがって閉塞空間２３に空気が残留することを抑制することができる。また閉塞空間２３にポッティング材１７を設けるので、有機発光パネルが湾曲していたり、製造による寸法公差があっても、隙間なく有機発光パネルの裏面と筐体フレーム１４とをポッティング材１７で接続することができる。そして筐体フレーム１４とポッティング材１７は熱伝導性を有するので、有機発光パネルの熱を伝えて筐体フレーム１４から外部空間に放熱することができる。これによって有機発光パネルを効率よく放熱することができる車両用表示装置１０を製造することができる。 Further, according to the manufacturing method of the vehicle display device 10 of the present embodiment, the first step of assembling the organic light emitting panel and the housing frame 14 to form the closed space 23 and the potting material from the hole 24 of the housing frame 14 It includes a second step of injecting the precursor of 17 and a third step of curing the precursor to form the potting material 17. The closed space 23 is formed by the first step shown in FIG. 10 (1), but since the sealer 18 has elasticity, the organic light emitting panel and the frame can be connected to each other even if there are tolerances due to the curvature and manufacturing of the organic light emitting panel. The closed space 23 can be reliably formed by absorbing the difference in spacing. Then, by the second step shown in FIG. 10 (2) and the third step shown in FIG. 10 (3), the precursor of the potting material 17 is poured from the injection hole 24 into the closed space 23 to pour the potting material 17 into the closed space 23. It can be provided in the closed space 23. Since the precursor of the potting material 17 is injected from the injection hole 24, the air in the closed space 23 can escape from the air bleeding hole 24. Therefore, it is possible to prevent air from remaining in the closed space 23. Further, since the potting material 17 is provided in the closed space 23, even if the organic light emitting panel is curved or there is a dimensional tolerance due to manufacturing, the back surface of the organic light emitting panel and the housing frame 14 are connected by the potting material 17 without a gap. be able to. Since the housing frame 14 and the potting material 17 have thermal conductivity, the heat of the organic light emitting panel can be transferred and dissipated from the housing frame 14 to the external space. This makes it possible to manufacture a vehicle display device 10 capable of efficiently dissipating heat from the organic light emitting panel.
　さらに本実施形態では、ポッティング材１７は、遅延硬化性を有する材料が硬化して形成されている。これによって閉塞空間２３にポッティング材１７の前駆体を注入したときに、直ちに硬化することなく、閉塞空間２３を充填することができる。したがってポッティング材１７による伝熱性を確保することができる。遅延硬化性としては、時間で硬化するだけでなく、加熱によって硬化する熱硬化性であってもよく、紫外線および湿気および２液で固まる材料であってもよい。 Further, in the present embodiment, the potting material 17 is formed by curing a material having delayed curability. As a result, when the precursor of the potting material 17 is injected into the closed space 23, the closed space 23 can be filled without being immediately cured. Therefore, the heat transfer property of the potting material 17 can be ensured. The delayed curability may be a thermosetting that not only cures over time but also cures by heating, or may be a material that hardens with ultraviolet rays, humidity, and two liquids.
　また本実施形態では、低粘度を有する前駆体が硬化して形成されている。これによって閉塞空間２３にポッティング材１７の前駆体を注入したときに、閉塞空間２３の隅々まで充填することができる。したがってポッティング材１７による伝熱性を確保することができる。 Further, in the present embodiment, a precursor having a low viscosity is cured and formed. As a result, when the precursor of the potting material 17 is injected into the closed space 23, it is possible to fill every corner of the closed space 23. Therefore, the heat transfer property of the potting material 17 can be ensured.
　さらに本実施形態では、筐体フレーム１４は金属材料からなる。これによって硬化に加熱が必要なポッティング材１７であっても、筐体フレーム１４を加熱することで確実に硬化させることができ、また硬化を促進することができる。 Further, in the present embodiment, the housing frame 14 is made of a metal material. As a result, even the potting material 17 that requires heating for curing can be reliably cured by heating the housing frame 14, and curing can be accelerated.
　またポッティング材１７、２液硬化型を使用することもでき、１液硬化型の加熱式の場合は、前述のように筐体フレーム１４を加熱することで、硬化を促進出来る。また筐体フレーム１４に穴２４を複数設けることで、充填箇所、充填スピードもコントロールすることができる。これによって組付け設備側の設計自由度も向上することができる。 The potting material 17 and the two-component curing type can also be used, and in the case of the one-component curing type heating type, curing can be promoted by heating the housing frame 14 as described above. Further, by providing a plurality of holes 24 in the housing frame 14, the filling location and filling speed can be controlled. As a result, the degree of freedom in design on the assembly equipment side can be improved.
　さらに本実施形態では、有機ＥＬパネル２１の裏面のほぼ全域にわたってポッティング材１７を設けている。そして筐体フレーム１４も有機ＥＬパネル２１の裏面とほぼ同じ表面の面積を有し、ポッティング材１７が設けられている。したがって有機ＥＬパネル２１の裏面の広範囲にわたって放熱面積を確保することができる。これによって冷却性能を向上することができる。 Further, in the present embodiment, the potting material 17 is provided over almost the entire back surface of the organic EL panel 21. The housing frame 14 also has an area of substantially the same surface as the back surface of the organic EL panel 21, and the potting material 17 is provided. Therefore, it is possible to secure a heat dissipation area over a wide area on the back surface of the organic EL panel 21. Thereby, the cooling performance can be improved.
　また本実施形態では、シーラー１８を設けている。シーラー１８を図７に示すように筐体フレーム１４の全周に追加しているので、有機ＥＬパネル２１との密着性を高めることができる。これによってポッティング材１７の充填作業を容易に実現することができる。 Further, in the present embodiment, the sealer 18 is provided. Since the sealer 18 is added to the entire circumference of the housing frame 14 as shown in FIG. 7, the adhesion to the organic EL panel 21 can be improved. Thereby, the filling work of the potting material 17 can be easily realized.
　（その他の実施形態）
　以上、本開示の好ましい実施形態について説明したが、本開示は前述した実施形態に何ら制限されることなく、本開示の主旨を逸脱しない範囲において種々変形して実施することが可能である。 (Other embodiments)
Although the preferred embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and can be variously modified and implemented without departing from the gist of the present disclosure.
　前述の実施形態の構造は、あくまで例示であって、本開示の範囲はこれらの記載の範囲に限定されるものではない。本開示の範囲は、請求の範囲の記載によって示され、さらに請求の範囲の記載と均等の意味及び範囲内での全ての変更を含むものである。 The structure of the above-described embodiment is merely an example, and the scope of the present disclosure is not limited to the scope of these descriptions. The scope of the present disclosure is indicated by the description of the scope of claims, and further includes all changes within the meaning and scope equivalent to the description of the claims.
　前述の第１実施形態では、表示装置は車両用によって実現されているが、車両に限るものではなく、他の用途であってもよい。 In the above-mentioned first embodiment, the display device is realized for a vehicle, but the display device is not limited to the vehicle and may be used for other purposes.
　前述の第１実施形態では、表示部１１はタッチパネルとしての機能も有するが、タッチパネルの機能がない表示装置であってもよい。また表示部１１は、有機ＥＬパネル２１を有する構成であるが、他の表示方式、たとえば液晶表示パネルであってもよい。 In the above-described first embodiment, the display unit 11 also has a function as a touch panel, but may be a display device having no touch panel function. Further, although the display unit 11 has a configuration having an organic EL panel 21, another display method, for example, a liquid crystal display panel may be used.
　前述の第１実施形態では、シーラー１８は、筐体フレーム１４の全周に設けられているが、このような構成に限るものではない。たとえば格子条に分割してシーラー１８を設けてもよい。この場合、区分けした部分に対応するように筐体フレーム１４に穴２４を設けることで、区分けされた閉塞空間２３にポッティング材１７を充填することができる。 In the above-mentioned first embodiment, the sealer 18 is provided on the entire circumference of the housing frame 14, but is not limited to such a configuration. For example, the sealer 18 may be provided by dividing the grid into strips. In this case, the potting material 17 can be filled in the divided closed space 23 by providing the hole 24 in the housing frame 14 so as to correspond to the divided portion.
　また前述の第１実施形態では、筐体フレーム１４とフロントパネル１２とは別体があったが、一体であってもよい。一体の場合は、タッチ部２０を筐体フレーム１４に固定する必要があるが、シーラー１８が接着材として機能、すなわちシーラー１８が弾性接着材３１の機能を有してもよい。 Further, in the above-mentioned first embodiment, the housing frame 14 and the front panel 12 are separate bodies, but they may be integrated. In the case of integration, the touch portion 20 needs to be fixed to the housing frame 14, but the sealer 18 may function as an adhesive, that is, the sealer 18 may have the function of the elastic adhesive 31.

Claims (4)

  1. 　画像を表示する表示面を有する有機発光パネル（２１）と、
    　前記表示面とは反対側の裏面から間隔をあけて設けられ、熱伝導性を有する平板状のフレーム（１４）と、
    　前記有機発光パネルの裏面と対向する側の前記フレームの表面から突出するように設けられ、弾力性を有し、前記有機発光パネルの裏面と接触して、前記有機発光パネルの裏面と前記フレームの表面との間隔を維持する壁部（１８）と、
    　前記壁部と前記有機発光パネルの裏面とフレームの表面とに囲まれた閉塞部分に充填され、熱伝導性を有するポッティング材（１７）と、有し、
    　前記フレームには、前記閉塞部分に連通する複数の穴（２４）が形成されている表示装置。     An organic light emitting panel (21) having a display surface for displaying an image, and
    A flat frame (14) provided at a distance from the back surface opposite to the display surface and having thermal conductivity, and a flat frame (14).
    It is provided so as to project from the front surface of the frame on the side facing the back surface of the organic light emitting panel, has elasticity, and comes into contact with the back surface of the organic light emitting panel to contact the back surface of the organic light emitting panel and the frame. The wall (18) that maintains the distance from the surface and
    The closed portion surrounded by the wall portion, the back surface of the organic light emitting panel, and the front surface of the frame is filled with a potting material (17) having thermal conductivity.
    A display device in which a plurality of holes (24) communicating with the closed portion are formed in the frame.
  2. 　前記ポッティング材は、遅延硬化性を有する材料が硬化して形成されている請求項１に記載の表示装置。 The display device according to claim 1, wherein the potting material is formed by curing a material having delayed curability.
  3. 　前記ポッティング材は、低粘度を有する前駆体が硬化して形成されている請求項１または２に記載の表示装置。 The display device according to claim 1 or 2, wherein the potting material is formed by curing a precursor having a low viscosity.
  4. 　画像を表示する表示面を有する有機発光パネル（２１）と、
    　前記表示面とは反対側の裏面に間隔をあけて設けられ、複数の穴（２４）が形成されており、熱伝導性を有する平板状のフレーム（１４）と、
    　前記有機発光パネルの裏面と対向する側の前記フレームの表面から突出するように設けられ、弾力性を有し、前記有機発光パネルの裏面と接触して、前記有機発光パネルの裏面と前記フレームの表面との間隔を維持する壁部（１８）と、を有する表示装置の製造方法であって、
    　前記有機発光パネルと前記フレームとを組み付けて、前記壁部と前記有機発光パネルの裏面とフレームの表面とに囲まれた閉塞空間（２３）を形成する第１工程と、
    　前記フレームの少なくとも１つの穴を除いた他の穴から熱伝導性を有するポッティング材（１７）の前駆体を注入する第２工程と、
    　前記前駆体を硬化して前記ポッティング材を形成する第３工程と、を含み、
    　前記フレームの穴のうち注入されない穴は、前記第２工程で、前記閉塞空間の空気を除去するための穴である表示装置の製造方法。     An organic light emitting panel (21) having a display surface for displaying an image, and
    A flat frame (14) having a plurality of holes (24) formed at intervals on the back surface opposite to the display surface and having thermal conductivity, and a flat frame (14).
    It is provided so as to project from the front surface of the frame on the side facing the back surface of the organic light emitting panel, has elasticity, and comes into contact with the back surface of the organic light emitting panel to contact the back surface of the organic light emitting panel and the frame. A method of manufacturing a display device having a wall portion (18) that maintains a distance from the surface.
    The first step of assembling the organic light emitting panel and the frame to form a closed space (23) surrounded by the wall portion, the back surface of the organic light emitting panel, and the front surface of the frame.
    The second step of injecting the precursor of the potting material (17) having thermal conductivity from the other holes except for at least one hole of the frame, and the second step.
    A third step of curing the precursor to form the potting material, and the like.
    A method for manufacturing a display device, wherein the holes that are not injected among the holes in the frame are holes for removing air in the closed space in the second step.
PCT/JP2021/005873 2020-04-15 2021-02-17 Display device and method for manufacturing display device WO2021210261A1 (en)

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