WO2017090336A1 - Heat dissipation structure - Google Patents

Heat dissipation structure Download PDF

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Publication number
WO2017090336A1
WO2017090336A1 PCT/JP2016/080476 JP2016080476W WO2017090336A1 WO 2017090336 A1 WO2017090336 A1 WO 2017090336A1 JP 2016080476 W JP2016080476 W JP 2016080476W WO 2017090336 A1 WO2017090336 A1 WO 2017090336A1
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WO
WIPO (PCT)
Prior art keywords
reflector
circuit board
light source
gap
heat dissipation
Prior art date
Application number
PCT/JP2016/080476
Other languages
French (fr)
Japanese (ja)
Inventor
和宣 都丸
Original Assignee
カルソニックカンセイ株式会社
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Publication date
Application filed by カルソニックカンセイ株式会社 filed Critical カルソニックカンセイ株式会社
Publication of WO2017090336A1 publication Critical patent/WO2017090336A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Arrangement of adaptations of instruments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/508—Cooling arrangements characterised by the adaptation for cooling of specific components of electrical circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof

Definitions

  • This case concerns the heat dissipation structure.
  • Some display devices include an illumination device such as a backlight capable of illuminating a display unit.
  • the backlight described in Patent Document 1 includes a circuit board having a light source (LED) attached to the surface thereof, and a reflector (reflecting member) disposed on the surface side of the circuit board so as to surround the light source. And have.
  • a diffusion sheet for adjusting luminance unevenness or the like is attached to the surface of the reflector.
  • Patent Document 1 has a problem that heat is trapped inside the reflector.
  • the main purpose of this case is to solve the above-mentioned problems.
  • a circuit board having a light source attached to the surface;
  • a reflector disposed on the surface side of the circuit board so as to surround the light source;
  • Between the reflector and the circuit board is provided with a ventilation part through which air can flow along the surface of the circuit board,
  • the ventilation portion is characterized by a heat dissipation structure having a gap portion at least between an edge portion of the circuit board and a base portion of the reflector.
  • the above configuration can prevent heat from being trapped inside the reflector.
  • FIG. 7A It is the longitudinal cross-sectional view which looked at the head-up display apparatus which uses the display apparatus provided with the illumination structure concerning this Embodiment from the side. It is a whole perspective view of the display apparatus of FIG. It is a perspective view of the illumination structure (backlight) which shows the state which removed the display part from the display apparatus of FIG. It is sectional drawing which cut
  • the display device 1 includes a display unit 2 and a backlight 3 (illumination device) that illuminates the display unit 2 from the back side, and is displayed by the backlight 3. It is assumed that the part 2 can be illuminated.
  • the backlight 3 described above includes a circuit board 6 having a light source 5 attached to the surface, as shown in FIGS. 3 to 5 (mainly see FIG. 5), A reflector 7 is provided on the surface side of the circuit board 6 so as to surround the light source 5.
  • an LED or the like is used for the light source 5.
  • a heat sink 11 having heat dissipating fins 11a is attached to the back side of the circuit board 6 (see FIG. 2).
  • the heat sink 11 is made of a metal having good thermal conductivity such as aluminum.
  • the reflector 7 is a light guide component having a substantially cylindrical or frame shape.
  • the reflector 7 has a board contact portion 12 that is in contact with the circuit board 6 on the base side (back side).
  • the reflector 7 has the light emission part 13 which radiate
  • the reflector 7 directly surrounds the light source 5 and reflects the light 14 from the light source 5 toward the light output portion 13, and an outer peripheral wall surrounding the outside of the reflection wall portion 15.
  • the resin part has a double structure having a portion 16.
  • the inner surface of the reflecting wall 15 is a reflecting surface.
  • the reflection wall part 15 and the outer peripheral wall part 16 are integrally connected by the frame-shaped connection surface part 18 in the front end part.
  • An inner portion (opening) of the frame-shaped connecting surface portion 18 is the light emitting portion 13, and the light emitting portion 13 is continuous with the inner surface of the reflecting wall portion 15.
  • the inside of the reflection wall portion 15 is a lamp chamber 21 (illumination room) that houses the light source 5, and the enclosure that surrounds the outside of the lamp chamber 21 is between the reflection wall portion 15 and the outer peripheral wall portion 16.
  • a space 22 is provided.
  • the lamp chamber 21 is in a state of being individually partitioned by a partition wall 43 for each of the light sources 5 attached to the circuit board 6.
  • the light emitting section 13 is approximately the same size as the illumination area of the light source 5 with respect to the display section 2.
  • the light exit unit 13 diffuses the light 14 from the light source 5 as necessary to make it uniform (or adjust brightness unevenness) or the like, or a diffusion plate 51 (or a diffusion sheet or diffusion). A film etc. can be attached.
  • the connecting surface portion 18 of the reflector 7 is provided with a diffusing plate attaching portion 57 such as a stepped concave portion 55 and a claw portion 56 along the edge of the light output portion 13 (see FIG. 3).
  • the display device 1 can illuminate the display unit 2 by disposing the backlight 3 so that the light output unit 13 faces the back side of the display unit 2 with respect to the display device 1. It becomes.
  • the display unit 2 can be, for example, a dial or a liquid crystal panel.
  • the display device 1 using the display unit 2 as a dial can be an instrument device or the like.
  • the display device 1 in which the display unit 2 is a liquid crystal panel can be a liquid crystal display device or the like.
  • the display unit 2 can be a combination of a dial and a liquid crystal panel.
  • the heat dissipation structure of this embodiment is as follows.
  • a ventilation portion 102 through which air 101 can flow is provided along the surface of the circuit board 6 between the reflector 7 and the circuit board 6.
  • the ventilation portion 102 has a gap portion 105 at least between the edge portion 103 of the circuit board 6 and the base portion of the reflector 7.
  • the gap 105 is provided as, for example, a gap for intake (intake gap), and the edge 103 of the circuit board 6 and the base of the reflector 7 (substrate contact portion 12 of the outer peripheral wall 16). And the position (in the direction of the surface of the circuit board 6) in a shifted state.
  • the gap 105 may be, for example, an exhaust gap.
  • the circuit board 6 is made smaller than the reflector 7 so that the gap 105 can be easily secured (pattern 2). It should be noted that a notch portion is provided in the edge portion 103 of the circuit board 6 so that a gap portion 105 is formed between the notch portion and the base portion of the reflector 7 (the substrate contact portion 12 of the outer peripheral wall portion 16). It may be (pattern 3).
  • the gap 105 is provided so as to communicate with the surrounding space 22 described above. Then, in order to allow the enclosed space 22 and the lamp chamber 21 to communicate with each other, at least a part of the base portion of the reflection wall portion 15 is made shorter than the base portion (substrate contact portion 12) of the outer peripheral wall portion 16 (in the non-contact portion). Thus, the base portion of the reflection wall portion 15 is separated from the surface of the circuit board 6 with a gap 106 (necessary as the gap portion 105).
  • the reflector 7 is installed in a sideways state. That is, the reflector 7 is arranged so that the light 14 is emitted from the reflector 7 in the lateral direction. Then, by aligning the upper side of the circuit board 6 whose vertical dimension is shortened with the base of the reflector 7 so that the lower side is displaced, the gap 105 is formed under the circuit board 6. It is made to provide between the edge part 103 of the side, and the base (the board
  • the ventilation portion 102 may have a hole portion 111 provided on a side surface of the base portion of the reflector 7 at a position away from the gap portion 105.
  • the hole 111 is provided, for example, as a hole for exhaust (exhaust hole), and the base of the reflector 7 installed in a sideways state (around the substrate contact portion 12 of the outer peripheral wall portion 16). ) In the upper side (both) side surfaces so as to communicate with the surrounding space 22.
  • the hole 111 may be a hole, but in this case, the hole 111 is a notch provided at the position of the substrate contact portion 12 of the outer peripheral wall 16, and this notch is used as a circuit board. It is made to become a hole shape by closing with 6.
  • the hole 111 may be an intake hole or the like.
  • the hole 111 described above can be provided at a position above the circuit board 6. Further, as shown in FIGS. 6A to 7B, an attachment portion 115 and a positioning portion 116 (for the heat sink 11, the display device 1, etc.) are provided between the circuit board 6 and the reflector 7.
  • the head-up display apparatus 73 which projects the image 71 displayed on the display apparatus 1 ahead (of the driver's seat in a vehicle) is provided.
  • the display device 1 includes a backlight 3 that illuminates an image 71.
  • the backlight 3 may include the circuit board 6 and the reflector 7 having the ventilation portion 102 therebetween (see FIG. 5).
  • the head-up display device 73 is provided with an image forming device 76 inside the housing 75 and an optical path 77 for guiding the image 71 formed by the image forming device 76 to the outside of the housing 75.
  • the housing 75 is provided with an opening 78 for taking out the image 71 guided to the optical path 77 to the outside.
  • the opening 78 is provided with a combiner 79 (for example, a translucent projection member) for projecting the image 71.
  • the housing 75 is appropriately provided with air holes for heat dissipation.
  • a reflecting mirror 81 is appropriately provided for reflecting the image 71 and guiding it to the combiner 79.
  • the image forming apparatus 76 is the display apparatus 1 described above, and the display apparatus 1 includes the display unit 2 and the backlight 3 that illuminates the display unit 2 from the back side as described above.
  • the display unit 2 is a liquid crystal panel.
  • the light 14 from the light source 5 passes through the inside of the reflector 7 installed on the front surface side of the circuit board 6, and the light output portion 13 provided on the tip side of the reflector 7. It is emitted from. Thereby, the display part 2 installed in the front end side of the reflector 7 is illuminated.
  • the light 14 from the light source 5 includes a light that has directly passed through the reflector 7 without being reflected (direct light) and a light that has been reflected by the reflector 7 (the reflection wall portion 15) (reflected light). It will be in the state of being condensed by combining. In this way, by condensing and irradiating the light 14 from the light source 5, the luminance can be increased and the illumination can be brightened.
  • the light source 5 generates heat as it emits light. Therefore, in the backlight 3, it is necessary to radiate heat inside the reflector 7.
  • the ventilation portion 102 is provided between the reflector 7 and the circuit board 6. Then, by allowing the air 101 to flow along the surface of the circuit board 6 by the ventilation portion 102, it is possible to efficiently release the heat generated by the light source 5 to the outside of the reflector 7.
  • the heat sink 11 for heat dissipation attached to the circuit board 6 can be reduced in size and weight, and the cost required for the heat sink 11 can be reduced.
  • the size and weight of the heat sink 11 it is possible to reduce the size and weight of the entire display device 1 having this heat dissipation structure.
  • the light source 5 with high brightness
  • the diffusion plate 51 is attached to the surface of the reflector 7, the air permeability inside the reflector 7 can be ensured.
  • the ventilation part 102 is not provided, the inside of the reflector 7 becomes a sealed space by the diffusion plate 51 attached to the surface of the reflector 7, so that heat is trapped inside the reflector 7. become.
  • a gap portion 105 of the ventilation portion 102 is provided in a portion (contact portion) between the edge portion 103 of the circuit board 6 and the base portion of the reflector 7 (substrate contact portion 12 of the outer peripheral wall portion 16). Since the air 101 is taken into (or exhausted from) the part 102, that is, the gap part 105 of the ventilation part 102 is lower than the light emitting part of the light source 5 (position close to the circuit board 6). Therefore, there is no need to worry about light leakage from the ventilation portion 102 (gap portion 105).
  • the gap 105 is obtained by arranging the positions of the edge 103 of the circuit board 6 and the base of the reflector 7 in a state of being shifted in the surface direction of the circuit board 6. Even simple. Furthermore, since the required gap portion 105 is ensured in the state where the base portion of the reflector 7 is in contact with the circuit board 6, the gap management is easy and reliable. On the other hand, for example, when the gap portion 105 is to be secured by installing the base portion of the reflector 7 away from the circuit board 6 in the direction perpendicular to the surface (or floating), it is difficult to manage the gap portion. The size of 105 becomes unstable.
  • a hole 111 of the vent 102 may be provided on the side surface of the base of the reflector 7. Thereby, the air 101 inside the reflector 7 heated by the heat of the light source 5 is discharged (or sucked) from the hole 111 to the outside. For example, by discharging the air 101 from the hole 111 to the outside, the air 101 having a low temperature outside the reflector 7 is introduced into the reflector 7 through the gap 105.
  • the gap portion 105 is provided at a lower position (at the base of the reflector 7) and the hole portion 111 is provided at an upper position, thereby generating natural convection of the air 101 from the bottom to the top. It is possible to efficiently dissipate heat to the outside. Further, since the hole portion 111 of the ventilation portion 102 is provided in the base portion (side surface thereof) of the reflector 7, as with the gap portion 105 described above, there is a concern about light leakage from the ventilation portion 102 (hole portion 111). Can be eliminated.
  • the head-up display device 73 projects the image 71 formed by the display device 1 on the combiner 79 and displays it as a virtual image so as to enter the field of view of the driver seat occupant who is driving facing the front. is there. And the backlight 3 provided with the circuit board 6 and the reflector 7 which have the ventilation part 102 in between may be applied with respect to such a head-up display apparatus 73.
  • FIG. Thereby, like the above, the heat dissipation effect of the backlight 3 of the head-up display device 73 can be enhanced. As a result, even if the light source 5 having high luminance and large heat generation is used, sufficient heat dissipation can be obtained, so that a brighter head-up display device 73 can be obtained.

Abstract

The present invention mainly prevents heat from being retained in the interior of a reflector. The present invention relates to a heat dissipation structure for a lighting device comprising: a circuit substrate (6) having a light source (5) attached to the surface thereof; and a reflector (7) arranged so as to surround the light source (5) on the surface side of the circuit substrate (6). A ventilation section (102) that makes it possible for air (101) to flow along the surface of the circuit substrate (6) is provided between the reflector (7) and the circuit substrate (6). The ventilation section (102) comprises at least a gap (105) between the edge (103) of the circuit substrate (6) and the base of the reflector (7).

Description

放熱構造Heat dissipation structure
　本件は、放熱構造に関するものである。 This case concerns the heat dissipation structure.
　例えば、自動車などの車両には、車室内に各種の表示装置が設けられている。そして、この表示装置には、表示部を照明可能なバックライトなどの照明装置を備えたものが存在している。 For example, vehicles such as automobiles are provided with various display devices in the passenger compartment. Some display devices include an illumination device such as a backlight capable of illuminating a display unit.
　例えば、特許文献１に記載されたバックライトは、表面に光源（ＬＥＤ）が取付けられた回路基板と、この回路基板の表面側に、前記光源を取り囲むように配設されたリフレクター（反射部材）とを有している。そして、リフレクターの表面には、輝度ムラなどを調整するための拡散シートが貼り付けられている。 For example, the backlight described in Patent Document 1 includes a circuit board having a light source (LED) attached to the surface thereof, and a reflector (reflecting member) disposed on the surface side of the circuit board so as to surround the light source. And have. A diffusion sheet for adjusting luminance unevenness or the like is attached to the surface of the reflector.
特開２００１－２８２１１８号公報JP 2001-282118 A
　しかしながら、上記特許文献１に記載されたバックライトには、リフレクターの内部に熱がこもってしまうという問題があった。 However, the backlight described in Patent Document 1 has a problem that heat is trapped inside the reflector.
　そこで、本件は、上記した問題点を解決することを、主な目的としている。 Therefore, the main purpose of this case is to solve the above-mentioned problems.
　上記課題を解決するために、本件は、
  表面に光源が取付けられている回路基板と、
  該回路基板の表面側に、前記光源を取り囲むように設置されているリフレクターとを有しており、
  該リフレクターと前記回路基板との間に、回路基板の表面に沿って空気を流通可能な通気部が設けられていると共に、
  該通気部が、少なくとも、前記回路基板の縁部と前記リフレクターの基部との間に隙間部を有している放熱構造を特徴とする。 In order to solve the above problem,
A circuit board having a light source attached to the surface;
A reflector disposed on the surface side of the circuit board so as to surround the light source;
Between the reflector and the circuit board is provided with a ventilation part through which air can flow along the surface of the circuit board,
The ventilation portion is characterized by a heat dissipation structure having a gap portion at least between an edge portion of the circuit board and a base portion of the reflector.
　本件によれば、上記構成によって、リフレクターの内部に熱がこもらないようにすることができる。 According to the present case, the above configuration can prevent heat from being trapped inside the reflector.
本実施の形態にかかる照明構造を備えた表示装置を使用するヘッドアップディスプレイ装置を側方から見た縦断面図である。It is the longitudinal cross-sectional view which looked at the head-up display apparatus which uses the display apparatus provided with the illumination structure concerning this Embodiment from the side. 図１の表示装置の全体斜視図である。It is a whole perspective view of the display apparatus of FIG. 図２の表示装置から表示部を取り外した状態を示す照明構造（バックライト）の斜視図である。It is a perspective view of the illumination structure (backlight) which shows the state which removed the display part from the display apparatus of FIG. 図３を縦に切断して側方から見た断面図である。It is sectional drawing which cut | disconnected longitudinally FIG. 3 and was seen from the side. 図４の部分拡大図である。It is the elements on larger scale of FIG. バックライトの背面図である。It is a rear view of a backlight. 図６Ａにおいて回路基板を外した状態を示す図である。It is a figure which shows the state which removed the circuit board in FIG. 6A. バックライトを背面側から見た斜視図である。It is the perspective view which looked at the backlight from the back side. 図７Ａにおいて回路基板を外した状態を示す図である。It is a figure which shows the state which removed the circuit board in FIG. 7A.
　以下、本実施の形態を、図面を用いて詳細に説明する。
  図１～図７Ｂは、この実施の形態を説明するためのものである。 Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 7B are for explaining this embodiment.
　＜構成＞以下、この実施例の構成について説明する。 <Configuration> The configuration of this embodiment will be described below.
　例えば、自動車などの車両には、車室内に各種の表示装置が設けられている。図１（および図２）に示すように、この表示装置１を、表示部２と、この表示部２を背面側から照明するバックライト３（照明装置）とを備えて、バックライト３によって表示部２を照明可能にしたものとする。 For example, vehicles such as automobiles are provided with various display devices in the passenger compartment. As shown in FIG. 1 (and FIG. 2), the display device 1 includes a display unit 2 and a backlight 3 (illumination device) that illuminates the display unit 2 from the back side, and is displayed by the backlight 3. It is assumed that the part 2 can be illuminated.
　そして、上記したバックライト３は、図３～図５（主に、図５参照）に示すように、表面に光源５が取付けられている回路基板６と、
  この回路基板６の表面側に、上記光源５を取り囲むように設置されているリフレクター７とを有するものとされる。 The backlight 3 described above includes a circuit board 6 having a light source 5 attached to the surface, as shown in FIGS. 3 to 5 (mainly see FIG. 5),
A reflector 7 is provided on the surface side of the circuit board 6 so as to surround the light source 5.
　ここで、光源５には、ＬＥＤなどが使用される。 Here, an LED or the like is used for the light source 5.
　回路基板６の裏面側には、放熱用のフィン１１ａを有するヒートシンク１１が取付けられる（図２参照）。このヒートシンク１１は、例えば、アルミ製などの熱伝導性の良い金属製のものとされる。 A heat sink 11 having heat dissipating fins 11a is attached to the back side of the circuit board 6 (see FIG. 2). The heat sink 11 is made of a metal having good thermal conductivity such as aluminum.
　リフレクター７は、ほぼ筒状または枠状をした導光部品である。リフレクター７は、その基部側（裏面側）に、回路基板６に当接される基板当接部１２を有している。また、リフレクター７は、その先端側（表面側）に、光源５からの光１４（図５参照）を出射させる出光部１３を有している。 The reflector 7 is a light guide component having a substantially cylindrical or frame shape. The reflector 7 has a board contact portion 12 that is in contact with the circuit board 6 on the base side (back side). Moreover, the reflector 7 has the light emission part 13 which radiate | emits the light 14 (refer FIG. 5) from the light source 5 in the front end side (surface side).
　具体的には、リフレクター７は、光源５を直接取り囲んで、光源５からの光１４を出光部１３へ向けて反射させるための反射壁部１５と、この反射壁部１５の外側を囲む外周壁部１６とを有する二重構造の樹脂部品とされている。反射壁部１５は、その内面が反射面となっている。そして、反射壁部１５と外周壁部１６とは、その先端側の部分が枠状の連結面部１８によって一体に連結されている。枠状の連結面部１８の内側部分（開口）は上記出光部１３となっており、この出光部１３は、反射壁部１５の内面と連続されている。 Specifically, the reflector 7 directly surrounds the light source 5 and reflects the light 14 from the light source 5 toward the light output portion 13, and an outer peripheral wall surrounding the outside of the reflection wall portion 15. The resin part has a double structure having a portion 16. The inner surface of the reflecting wall 15 is a reflecting surface. And the reflection wall part 15 and the outer peripheral wall part 16 are integrally connected by the frame-shaped connection surface part 18 in the front end part. An inner portion (opening) of the frame-shaped connecting surface portion 18 is the light emitting portion 13, and the light emitting portion 13 is continuous with the inner surface of the reflecting wall portion 15.
　そして、上記した反射壁部１５の内部は光源５を収容するランプ室２１（照明ルーム）になっており、反射壁部１５と外周壁部１６との間にはランプ室２１の外側を取り囲む包囲空間２２が設けられている。なお、ランプ室２１は、回路基板６に対して複数取付けられた光源５ごとに、仕切壁４３によって個々に仕切られた状態になっている。 The inside of the reflection wall portion 15 is a lamp chamber 21 (illumination room) that houses the light source 5, and the enclosure that surrounds the outside of the lamp chamber 21 is between the reflection wall portion 15 and the outer peripheral wall portion 16. A space 22 is provided. The lamp chamber 21 is in a state of being individually partitioned by a partition wall 43 for each of the light sources 5 attached to the circuit board 6.
　上記出光部１３は、表示部２に対する光源５の照明領域とほぼ同じ大きさとされている。そして、出光部１３には、必要に応じて、光源５からの光１４を拡散させて均一化を図るための（または、輝度ムラなどを調整するための）拡散板５１（または拡散シートや拡散フィルムなど）が取付けられるようになっている。拡散板５１を取付けるために、リフレクター７の連結面部１８には、出光部１３の縁部に沿って段差凹部５５や爪部５６などの拡散板取付部５７が設けられる（図３参照）。 The light emitting section 13 is approximately the same size as the illumination area of the light source 5 with respect to the display section 2. The light exit unit 13 diffuses the light 14 from the light source 5 as necessary to make it uniform (or adjust brightness unevenness) or the like, or a diffusion plate 51 (or a diffusion sheet or diffusion). A film etc. can be attached. In order to attach the diffusing plate 51, the connecting surface portion 18 of the reflector 7 is provided with a diffusing plate attaching portion 57 such as a stepped concave portion 55 and a claw portion 56 along the edge of the light output portion 13 (see FIG. 3).
　そして、図１に示すように、表示装置１に対し、表示部２の裏面側へ出光部１３が向くようにバックライト３を配置することによって、表示装置１は表示部２が照明可能なものとなる。この表示部２は、例えば、文字板や液晶パネルなどとすることができる。表示部２を文字板とした表示装置１は、計器装置などにすることができる。また、表示部２を液晶パネルとした表示装置１は、液晶表示装置などにすることができる。なお、表示部２は、文字板と液晶パネルとを組み合わせたものなどとすることもできる。 As shown in FIG. 1, the display device 1 can illuminate the display unit 2 by disposing the backlight 3 so that the light output unit 13 faces the back side of the display unit 2 with respect to the display device 1. It becomes. The display unit 2 can be, for example, a dial or a liquid crystal panel. The display device 1 using the display unit 2 as a dial can be an instrument device or the like. Further, the display device 1 in which the display unit 2 is a liquid crystal panel can be a liquid crystal display device or the like. The display unit 2 can be a combination of a dial and a liquid crystal panel.
　以上のような表示装置１やバックライト３の構成に対し、この実施例の放熱構造は、以下のようなものとされる。 In contrast to the configuration of the display device 1 and the backlight 3 as described above, the heat dissipation structure of this embodiment is as follows.
　（１）図５（～図７Ｂ）に示すように、リフレクター７と上記回路基板６との間に、回路基板６の表面に沿って空気１０１を流通可能な通気部１０２が設けられている。
  そして、この通気部１０２が、少なくとも、上記回路基板６の縁部１０３と上記リフレクター７の基部との間に隙間部１０５を有するものとされている。 (1) As shown in FIG. 5 (FIG. 7B), a ventilation portion 102 through which air 101 can flow is provided along the surface of the circuit board 6 between the reflector 7 and the circuit board 6.
The ventilation portion 102 has a gap portion 105 at least between the edge portion 103 of the circuit board 6 and the base portion of the reflector 7.
　ここで、隙間部１０５は、例えば、吸気用の隙間などとして設けられるものであり（吸気隙間）、回路基板６の縁部１０３とリフレクター７の基部（外周壁部１６の基板当接部１２）との位置を（回路基板６の面方向に）ズラした状態で当接させることによって形成したものとされる。但し、隙間部１０５は、例えば、排気用の隙間などとなっても良い。 Here, the gap 105 is provided as, for example, a gap for intake (intake gap), and the edge 103 of the circuit board 6 and the base of the reflector 7 (substrate contact portion 12 of the outer peripheral wall 16). And the position (in the direction of the surface of the circuit board 6) in a shifted state. However, the gap 105 may be, for example, an exhaust gap.
　ズラした状態には、同じ大きさのものどうしの位置をズラして合わせる場合（パターン１）や、異なる大きさのものを合わせる場合（パターン２）や、縁部形状が異なるものどうしを合わせる場合（パターン３）や、これらを適宜組み合わせる場合（パターン４）などが含まれる。この実施例では、隙間部１０５を容易に確保できるようにするために、回路基板６を、リフレクター７よりも小さなものとしている（パターン２）。なお、回路基板６の縁部１０３に切欠状の部分を設けて、この切欠状の部分とリフレクター７の基部（外周壁部１６の基板当接部１２）との間に隙間部１０５が生じるようにしても良い（パターン３）。 When shifting the position of the same size (pattern 1), when matching different sizes (pattern 2), or when matching different edge shapes (Pattern 3) and the case where these are appropriately combined (Pattern 4) are included. In this embodiment, the circuit board 6 is made smaller than the reflector 7 so that the gap 105 can be easily secured (pattern 2). It should be noted that a notch portion is provided in the edge portion 103 of the circuit board 6 so that a gap portion 105 is formed between the notch portion and the base portion of the reflector 7 (the substrate contact portion 12 of the outer peripheral wall portion 16). It may be (pattern 3).
　この場合、隙間部１０５は、上記した包囲空間２２に対して連通されるように設けられている。そして、包囲空間２２とランプ室２１とを連通させるために、反射壁部１５の基部の少なくとも一部を外周壁部１６の基部（基板当接部１２）よりも短くする（非当接部にする）ことで、回路基板６の表面に対して反射壁部１５の基部が、（隙間部１０５として必要な）間隙１０６を有して離間されるようにしている。 In this case, the gap 105 is provided so as to communicate with the surrounding space 22 described above. Then, in order to allow the enclosed space 22 and the lamp chamber 21 to communicate with each other, at least a part of the base portion of the reflection wall portion 15 is made shorter than the base portion (substrate contact portion 12) of the outer peripheral wall portion 16 (in the non-contact portion). Thus, the base portion of the reflection wall portion 15 is separated from the surface of the circuit board 6 with a gap 106 (necessary as the gap portion 105).
　更に、この実施例では、リフレクター７は、横向き状態で設置されるようにしている。即ち、リフレクター７から横向きに光１４が出射されるようにリフレクター７を配置している。そして、リフレクター７の基部に対し、上下寸法を短くした回路基板６を上側で合わせることで、下側がズレた状態となるようにして当接させることによって、隙間部１０５は、回路基板６の下側の縁部１０３とリフレクター７の下側となっている外周壁部１６の基部（外周壁部１６の基板当接部１２）との間に設けられるようにしている。 Furthermore, in this embodiment, the reflector 7 is installed in a sideways state. That is, the reflector 7 is arranged so that the light 14 is emitted from the reflector 7 in the lateral direction. Then, by aligning the upper side of the circuit board 6 whose vertical dimension is shortened with the base of the reflector 7 so that the lower side is displaced, the gap 105 is formed under the circuit board 6. It is made to provide between the edge part 103 of the side, and the base (the board | substrate contact part 12 of the outer peripheral wall part 16) of the outer peripheral wall part 16 which is the lower side of the reflector 7. FIG.
　（２）更に、上記通気部１０２が、上記リフレクター７の基部における、上記隙間部１０５から離れた位置の側面に設けられた孔部１１１を有しても良い。 (2) Further, the ventilation portion 102 may have a hole portion 111 provided on a side surface of the base portion of the reflector 7 at a position away from the gap portion 105.
　ここで、孔部１１１は、例えば、排気用の孔などとして設けられるものであり（排気孔部）、横向き状態で設置されているリフレクター７の基部（外周壁部１６の基板当接部１２周辺）における、上側となる位置の（両）側面に、包囲空間２２に対して連通されるように設けられている。孔部１１１は、孔状のものとしても良いが、この場合、孔部１１１は、外周壁部１６の基板当接部１２の位置に設けた切欠部とされると共に、この切欠部を回路基板６で塞ぐことで孔状になるようにしている。但し、孔部１１１は、吸気用の孔などとなっても良い。 Here, the hole 111 is provided, for example, as a hole for exhaust (exhaust hole), and the base of the reflector 7 installed in a sideways state (around the substrate contact portion 12 of the outer peripheral wall portion 16). ) In the upper side (both) side surfaces so as to communicate with the surrounding space 22. The hole 111 may be a hole, but in this case, the hole 111 is a notch provided at the position of the substrate contact portion 12 of the outer peripheral wall 16, and this notch is used as a circuit board. It is made to become a hole shape by closing with 6. However, the hole 111 may be an intake hole or the like.
　なお、構造的には、上記した孔部１１１は、回路基板６の上側の位置に設けることも可能である。また、図６Ａ～図７Ｂに示すように、回路基板６とリフレクター７との間には、（ヒートシンク１１や表示装置１などに対する）取付部１１５と位置決め部１１６とが設けられている。 Note that structurally, the hole 111 described above can be provided at a position above the circuit board 6. Further, as shown in FIGS. 6A to 7B, an attachment portion 115 and a positioning portion 116 (for the heat sink 11, the display device 1, etc.) are provided between the circuit board 6 and the reflector 7.
　（３）そして、図１に示すように、表示装置１に表示された画像７１を（車両における運転席の）前方へ投影するヘッドアップディスプレイ装置７３が設けられる。
  上記表示装置１が、画像７１を照明するバックライト３を備えたものとされている。
  そして、このバックライト３が、間に上記通気部１０２を有する上記回路基板６および上記リフレクター７を備えたものとされても良い（図５参照）。 (3) And as shown in FIG. 1, the head-up display apparatus 73 which projects the image 71 displayed on the display apparatus 1 ahead (of the driver's seat in a vehicle) is provided.
The display device 1 includes a backlight 3 that illuminates an image 71.
The backlight 3 may include the circuit board 6 and the reflector 7 having the ventilation portion 102 therebetween (see FIG. 5).
　ここで、ヘッドアップディスプレイ装置７３は、ハウジング７５の内部に、画像形成装置７６と、この画像形成装置７６で形成された画像７１をハウジング７５の外部へと導く光路７７とを設けたものとされる。 Here, the head-up display device 73 is provided with an image forming device 76 inside the housing 75 and an optical path 77 for guiding the image 71 formed by the image forming device 76 to the outside of the housing 75. The
　そして、ハウジング７５には、光路７７に導かれた画像７１を外部へ取り出すための開口部７８が設けられている。この開口部７８には、画像７１を投影させるためのコンバイナー７９（例えば、半透光性の投影部材）が設けられている。ハウジング７５には、放熱用の空気穴が適宜設けられている。なお、光路７７の途中には、画像７１を反射させてコンバイナー７９へ導くなどのための反射鏡８１が適宜設けられている。 The housing 75 is provided with an opening 78 for taking out the image 71 guided to the optical path 77 to the outside. The opening 78 is provided with a combiner 79 (for example, a translucent projection member) for projecting the image 71. The housing 75 is appropriately provided with air holes for heat dissipation. In the middle of the optical path 77, a reflecting mirror 81 is appropriately provided for reflecting the image 71 and guiding it to the combiner 79.
　画像形成装置７６は、上記した表示装置１とされ、この表示装置１は、上記したように、表示部２と、表示部２を背面側から照明するバックライト３とを備えている。表示部２は、液晶パネルとされる。 The image forming apparatus 76 is the display apparatus 1 described above, and the display apparatus 1 includes the display unit 2 and the backlight 3 that illuminates the display unit 2 from the back side as described above. The display unit 2 is a liquid crystal panel.
　＜作用＞以下、この実施例の作用について説明する。 <Operation> The operation of this embodiment will be described below.
　回路基板６に取付けた光源５を点灯すると、光源５からの光１４は、回路基板６の表面側に設置されているリフレクター７の内部を通ってリフレクター７の先端側に設けられた出光部１３から出射される。これにより、リフレクター７の先端側に設置された表示部２が照明される。 When the light source 5 attached to the circuit board 6 is turned on, the light 14 from the light source 5 passes through the inside of the reflector 7 installed on the front surface side of the circuit board 6, and the light output portion 13 provided on the tip side of the reflector 7. It is emitted from. Thereby, the display part 2 installed in the front end side of the reflector 7 is illuminated.
　この際、光源５からの光１４は、リフレクター７の内部を反射せずに直接通過したもの（直接光）と、リフレクター７（の反射壁部１５）で反射されたもの（反射光）とが合わさることで集光された状態になる。このように、光源５からの光１４を集光させて照射することにより、輝度を高めて照明を明るくすることができる。 At this time, the light 14 from the light source 5 includes a light that has directly passed through the reflector 7 without being reflected (direct light) and a light that has been reflected by the reflector 7 (the reflection wall portion 15) (reflected light). It will be in the state of being condensed by combining. In this way, by condensing and irradiating the light 14 from the light source 5, the luminance can be increased and the illumination can be brightened.
　そして、光源５は、発光に伴って発熱する。よって、バックライト３においては、リフレクター７内部の放熱を図る必要がある。 The light source 5 generates heat as it emits light. Therefore, in the backlight 3, it is necessary to radiate heat inside the reflector 7.
　＜効果＞この実施例によれば、以下のような効果を得ることができる。 <Effect> According to this embodiment, the following effects can be obtained.
　（効果１）上記において、リフレクター７と回路基板６との間に通気部１０２が設けられるようにした。そして、この通気部１０２によって、回路基板６の表面に沿って空気１０１を流通させるようにすることで、光源５が発する熱を効率的にリフレクター７の外部へ放出することが可能となる。 (Effect 1) In the above, the ventilation portion 102 is provided between the reflector 7 and the circuit board 6. Then, by allowing the air 101 to flow along the surface of the circuit board 6 by the ventilation portion 102, it is possible to efficiently release the heat generated by the light source 5 to the outside of the reflector 7.
　その結果、光源５が発する熱に対する放熱性を上げて、リフレクター７の内部に熱がこもらないようにすることができる。よって、その分、回路基板６に取付けられる放熱用のヒートシンク１１を小型・軽量化して、ヒートシンク１１に要するコストを削減することが可能となる。また、ヒートシンク１１の小型・軽量化により、この放熱構造を備えた表示装置１全体の小型・軽量化も得ることができる。 As a result, it is possible to increase the heat dissipation performance of the heat generated by the light source 5 and prevent the heat from being trapped inside the reflector 7. Accordingly, the heat sink 11 for heat dissipation attached to the circuit board 6 can be reduced in size and weight, and the cost required for the heat sink 11 can be reduced. In addition, by reducing the size and weight of the heat sink 11, it is possible to reduce the size and weight of the entire display device 1 having this heat dissipation structure.
　あるいは、放熱性の向上により、輝度の高い（即ち、発熱の大きい）光源５を使用することが可能となる。加えて、リフレクター７の表面に拡散板５１が取付けられているような場合であっても、リフレクター７内部の通気性を確保することができる。
　これに対し、通気部１０２を設けていない場合には、リフレクター７の表面に取付けた拡散板５１によってリフレクター７の内部が密閉空間となってしまうため、リフレクター７の内部に熱がこもってしまうことになる。 Or it becomes possible to use the light source 5 with high brightness | luminance (namely, heat_generation | fever is large) by improvement of heat dissipation. In addition, even if the diffusion plate 51 is attached to the surface of the reflector 7, the air permeability inside the reflector 7 can be ensured.
On the other hand, when the ventilation part 102 is not provided, the inside of the reflector 7 becomes a sealed space by the diffusion plate 51 attached to the surface of the reflector 7, so that heat is trapped inside the reflector 7. become.
　この際、回路基板６の縁部１０３とリフレクター７の基部（外周壁部１６の基板当接部１２）との間の部分（当接部分）に通気部１０２の隙間部１０５を設けて、通気部１０２への空気１０１の取り込み（または排気）などを行わせるようにしているので、即ち、通気部１０２の隙間部１０５を、光源５の発光部よりも低い位置（回路基板６に近い位置）に設けるようにしているので、通気部１０２（隙間部１０５）からの光漏れなどの心配をなくすことができる。 At this time, a gap portion 105 of the ventilation portion 102 is provided in a portion (contact portion) between the edge portion 103 of the circuit board 6 and the base portion of the reflector 7 (substrate contact portion 12 of the outer peripheral wall portion 16). Since the air 101 is taken into (or exhausted from) the part 102, that is, the gap part 105 of the ventilation part 102 is lower than the light emitting part of the light source 5 (position close to the circuit board 6). Therefore, there is no need to worry about light leakage from the ventilation portion 102 (gap portion 105).
　しかも、隙間部１０５は、回路基板６の縁部１０３とリフレクター７の基部との位置を、回路基板６の面方向へズラした状態で配置することなどによって得るようにしているので、構造的にも簡単である。更に、リフレクター７は、その基部を回路基板６に当接させた状態で、所要の隙間部１０５が確保されるようにしているので、隙間管理が容易且つ確実である。これ対し、例えば、リフレクター７の基部を、回路基板６から面直方向に離して（または浮かして）設置することによって隙間部１０５を確保しようとした場合には、隙間管理が困難で、隙間部１０５の大きさが不安定になる。 In addition, the gap 105 is obtained by arranging the positions of the edge 103 of the circuit board 6 and the base of the reflector 7 in a state of being shifted in the surface direction of the circuit board 6. Even simple. Furthermore, since the required gap portion 105 is ensured in the state where the base portion of the reflector 7 is in contact with the circuit board 6, the gap management is easy and reliable. On the other hand, for example, when the gap portion 105 is to be secured by installing the base portion of the reflector 7 away from the circuit board 6 in the direction perpendicular to the surface (or floating), it is difficult to manage the gap portion. The size of 105 becomes unstable.
　（効果２）リフレクター７の基部の側面に通気部１０２の孔部１１１を設けても良い。これにより、光源５の熱によって暖められたリフレクター７の内部の空気１０１が孔部１１１から外部へ排出（または吸入）されるようになる。そして、例えば、この孔部１１１から外部への空気１０１の排出によって、リフレクター７の外部の温度の低い空気１０１が隙間部１０５を通してリフレクター７の内部へ導入されることになる。 (Effect 2) A hole 111 of the vent 102 may be provided on the side surface of the base of the reflector 7. Thereby, the air 101 inside the reflector 7 heated by the heat of the light source 5 is discharged (or sucked) from the hole 111 to the outside. For example, by discharging the air 101 from the hole 111 to the outside, the air 101 having a low temperature outside the reflector 7 is introduced into the reflector 7 through the gap 105.
　その結果、リフレクター７の内部に、回路基板６の表面に沿った空気１０１の自然対流が生じるので、この空気１０１の自然対流を利用して、光源５が発した熱を効果的にリフレクター７の内部から外部へ放熱することが可能となる。 As a result, natural convection of the air 101 along the surface of the circuit board 6 occurs inside the reflector 7, and the natural convection of the air 101 is used to effectively generate heat generated by the light source 5. Heat can be radiated from the inside to the outside.
　この際、隙間部１０５を（リフレクター７の基部における）下側となる位置に設けると共に、孔部１１１を上側となる位置に設けることにより、下から上へ向かう空気１０１の自然対流を発生させて、効率良く外部への放熱を行わせることができる。また、通気部１０２の孔部１１１をリフレクター７の基部（の側面）に設けるようにしているので、上記した隙間部１０５と同様に、通気部１０２（孔部１１１）からの光漏れなどの心配をなくすことができる。 At this time, the gap portion 105 is provided at a lower position (at the base of the reflector 7) and the hole portion 111 is provided at an upper position, thereby generating natural convection of the air 101 from the bottom to the top. It is possible to efficiently dissipate heat to the outside. Further, since the hole portion 111 of the ventilation portion 102 is provided in the base portion (side surface thereof) of the reflector 7, as with the gap portion 105 described above, there is a concern about light leakage from the ventilation portion 102 (hole portion 111). Can be eliminated.
　（効果３）ヘッドアップディスプレイ装置７３は、正面を向いて運転している運転席乗員の視界に入るように、表示装置１で形成した画像７１をコンバイナー７９に投影させて虚像として表示させるものである。そして、このようなヘッドアップディスプレイ装置７３に対して、間に通気部１０２を有する回路基板６およびリフレクター７を備えたバックライト３を適用するようにしても良い。これにより、上記と同様に、ヘッドアップディスプレイ装置７３のバックライト３の放熱効果を高くすることができる。その結果、輝度が高く、発熱の大きい光源５を使用しても、十分な放熱性が得られるようになるので、より明るいヘッドアップディスプレイ装置７３にすることが可能となる。 (Effect 3) The head-up display device 73 projects the image 71 formed by the display device 1 on the combiner 79 and displays it as a virtual image so as to enter the field of view of the driver seat occupant who is driving facing the front. is there. And the backlight 3 provided with the circuit board 6 and the reflector 7 which have the ventilation part 102 in between may be applied with respect to such a head-up display apparatus 73. FIG. Thereby, like the above, the heat dissipation effect of the backlight 3 of the head-up display device 73 can be enhanced. As a result, even if the light source 5 having high luminance and large heat generation is used, sufficient heat dissipation can be obtained, so that a brighter head-up display device 73 can be obtained.
　以上、実施例を図面により詳述してきたが、実施例は例示にしか過ぎないものである。よって、実施例の構成にのみ限定されるものではなく、要旨を逸脱しない範囲の設計の変更等があっても本件に含まれることは勿論である。また、例えば、各実施例に複数の構成が含まれている場合には、特に記載がなくとも、これらの構成の可能な組合せが本件に含まれることは勿論である。また、複数の実施例や変形例が本件のものとして開示されている場合には、特に記載がなくとも、これらに跨がった構成の組合せのうちの可能なものが本件に含まれることは勿論である。また、図面に描かれている構成については、特に記載がなくとも、本件に含まれることは勿論である。更に、「等」の用語がある場合には、同等のものを含むという意味で用いられている。また、「ほぼ」「約」「程度」などの用語がある場合には、常識的に認められる範囲や精度のものを含むという意味で用いられている。 Although the embodiments have been described in detail with reference to the drawings, the embodiments are only examples. Therefore, the present invention is not limited to the configuration of the embodiment, and it is a matter of course that changes in design and the like within a range not departing from the gist are included in the present case. For example, when a plurality of configurations are included in each embodiment, it is a matter of course that possible combinations of these configurations are included in this case even if not specifically described. In addition, in the case where a plurality of examples and modifications are disclosed as the present case, even if there is no particular description, it is possible that a possible combination of configurations across these is included in the present case. Of course. Further, the configuration depicted in the drawings is included in the present case even if there is no particular description. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.
　１　　　表示装置
　３　　　バックライト
　５　　　光源
　６　　　回路基板
　７　　　リフレクター
　７１　　画像
　７３　　ヘッドアップディスプレイ装置
　１０２　通気部
　１０３　縁部
　１０５　隙間部
　１１１　孔部 DESCRIPTION OF SYMBOLS 1 Display apparatus 3 Backlight 5 Light source 6 Circuit board 7 Reflector 71 Image 73 Head-up display apparatus 102 Ventilation part 103 Edge part 105 Clearance part 111 Hole part
関連出願の相互参照Cross-reference of related applications
　本出願は、２０１５年１１月２７日に、日本国特許庁に出願された特願２０１５－２３２０８８に基づいて優先権を主張し、その全ての開示は、完全に本明細書で参照により組み込まれる。 This application claims priority based on Japanese Patent Application No. 2015-232088 filed with the Japan Patent Office on November 27, 2015, the entire disclosure of which is fully incorporated herein by reference. .

Claims (3)

  1.   表面に光源が取付けられている回路基板と、
      該回路基板の表面側に、前記光源を取り囲むように設置されているリフレクターとを有しており、
      該リフレクターと前記回路基板との間に、回路基板の表面に沿って空気を流通可能な通気部が設けられていると共に、
      該通気部が、少なくとも、前記回路基板の縁部と前記リフレクターの基部との間に隙間部を有していることを特徴とする放熱構造。     A circuit board having a light source attached to the surface;
    A reflector disposed on the surface side of the circuit board so as to surround the light source;
    Between the reflector and the circuit board is provided with a ventilation part through which air can flow along the surface of the circuit board,
    The heat radiating structure, wherein the ventilation portion has a gap portion at least between an edge portion of the circuit board and a base portion of the reflector.
  2. 　請求項１に記載の放熱構造において、
      前記通気部が、前記リフレクターの基部における、前記隙間部から離れた位置の側面に設けられた孔部を有していることを特徴とする放熱構造。     In the heat dissipation structure according to claim 1,
    The heat radiating structure, wherein the ventilation portion has a hole provided in a side surface at a position away from the gap in the base of the reflector.
  3. 　請求項１に記載の放熱構造において、
      表示装置に表示された画像を前方へ投影するヘッドアップディスプレイ装置が設けられていると共に、
      前記表示装置が、画像を照明するバックライトを備えており、
      該バックライトが、間に前記通気部を有する前記回路基板および前記リフレクターを備えていることを特徴とする放熱構造。     In the heat dissipation structure according to claim 1,
    A head-up display device that projects an image displayed on the display device forward is provided,
    The display device includes a backlight for illuminating an image;
    The backlight includes the circuit board having the ventilation portion therebetween and the reflector.
PCT/JP2016/080476 2015-11-27 2016-10-14 Heat dissipation structure WO2017090336A1 (en)

Applications Claiming Priority (2)

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JP2015-232088 2015-11-27
JP2015232088A JP2017098197A (en) 2015-11-27 2015-11-27 Heat radiation structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220179259A1 (en) * 2019-03-28 2022-06-09 Maxell, Ltd. Head-up display

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Publication number Priority date Publication date Assignee Title
JP2004094115A (en) * 2002-09-03 2004-03-25 Olympus Corp Lighting device and display device using same
JP2011150990A (en) * 2009-12-25 2011-08-04 Nippon Seiki Co Ltd Lighting system
JP2012226950A (en) * 2011-04-19 2012-11-15 Mitsubishi Electric Corp Lighting system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004094115A (en) * 2002-09-03 2004-03-25 Olympus Corp Lighting device and display device using same
JP2011150990A (en) * 2009-12-25 2011-08-04 Nippon Seiki Co Ltd Lighting system
JP2012226950A (en) * 2011-04-19 2012-11-15 Mitsubishi Electric Corp Lighting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220179259A1 (en) * 2019-03-28 2022-06-09 Maxell, Ltd. Head-up display
US11860463B2 (en) * 2019-03-28 2024-01-02 Maxell, Ltd. Head-up display

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