WO2019004239A1 - Unité de rétroéclairage et affichage tête haute - Google Patents

Unité de rétroéclairage et affichage tête haute Download PDF

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Publication number
WO2019004239A1
WO2019004239A1 PCT/JP2018/024269 JP2018024269W WO2019004239A1 WO 2019004239 A1 WO2019004239 A1 WO 2019004239A1 JP 2018024269 W JP2018024269 W JP 2018024269W WO 2019004239 A1 WO2019004239 A1 WO 2019004239A1
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WO
WIPO (PCT)
Prior art keywords
heat sink
light
lens
display
substrate
Prior art date
Application number
PCT/JP2018/024269
Other languages
English (en)
Japanese (ja)
Inventor
文吉 金子
正雄 佐藤
泰行 飯田
俊郎 鶴丸
長谷川　達也
航 齋藤
Original Assignee
日本精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Priority to JP2019526956A priority Critical patent/JP7100811B2/ja
Publication of WO2019004239A1 publication Critical patent/WO2019004239A1/fr

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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—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells

Definitions

  • the present invention relates to a backlight unit and a head-up display provided with the backlight unit.
  • the head-up display is mounted, for example, on a vehicle, and displays a virtual image as information necessary for the driver to drive through a transmissive reflection unit such as a windshield.
  • a transmissive reflection unit such as a windshield.
  • the head-up display can display information superimposed on the scenery in front of the vehicle, and the driver can grasp necessary information without performing a large eye movement during driving.
  • the head-up display has a display device for displaying a display image.
  • the display device has a liquid crystal display panel and a backlight unit for illuminating the liquid crystal panel.
  • the backlight unit has a substrate on which the light source is mounted, and a lens for collecting light from the light source. Moreover, the backlight unit radiates the heat which a light source emits to the exterior by having a heat sink and a heat conduction sheet.
  • the lens is designed to efficiently collect the light of the light source. For this reason, the lens and the substrate must be positioned with high accuracy.
  • the backlight unit is manufactured by sequentially assembling a lens, a substrate, a heat conductive sheet and a heat sink.
  • a lens for example, in order to accurately position each component using a positioning pin and a corresponding hole, it is necessary to reduce the clearance between the positioning pin and the hole.
  • the larger the clearance the better. For this reason, coexistence with positioning accuracy and workability was a subject.
  • the present invention has been made in consideration of such circumstances, and it is an object of the present invention to provide a backlight unit excellent in manufacturability and a head-up display including the same.
  • the backlight unit dissipates the heat transmitted from the substrate on which the light source is mounted, the thermally conductive sheet which transmits the heat of the light source, and the thermally conductive sheet, And a heat sink having a mounting surface on which the heat conductive sheet is mounted, and a positioning wall for positioning the substrate and the heat conductive sheet with respect to the surface direction of the mounting surface.
  • the head-up display which concerns on this invention, and is a perspective view explaining the whole structure.
  • the longitudinal cross-sectional view of the head up display of FIG. The disassembled perspective view of a backlight unit. Sectional drawing of a backlight unit. Sectional drawing for demonstrating the positioning of a backlight unit.
  • the principal part top view which shows a display apparatus, a heat sink, and the wall part of upper case.
  • the head-up display according to the present invention is mounted, for example, on a vehicle such as a car.
  • the head-up display according to the present invention will be described using an example mounted on a car.
  • FIG. 1 is an embodiment of a head-up display according to the present invention, and is a perspective view for explaining the entire configuration.
  • FIG. 2 is a plan view of the head-up display 1 with the upper case 21 and the light transmitting cover 30 removed.
  • FIG. 3 is a longitudinal sectional view of the head-up display 1 of FIG.
  • a head-up display 1 (hereinafter referred to as HUD 1) is disposed in an instrument panel of a car.
  • the HUD 1 mainly includes a display device 3, a plane mirror 4, a concave mirror 5, a case 6, and a control substrate 7.
  • the HUD 1 reflects the display light representing the display image displayed by the display device 3 by the plane mirror 4 and the concave mirror 5 constituting the relay optical system, and irradiates the windshield of the car, which is an example of the transmission / reflection unit.
  • a viewer (mainly the driver) can view the virtual image of the display image superimposed on the real view in front of the vehicle.
  • the display device 3 outputs display light.
  • the display device 3 is, for example, a TFT (Thin Film Transistor) type liquid crystal display device.
  • the display device 3 has a backlight unit 40 and a liquid crystal display panel 41.
  • FIG. 4 is an exploded perspective view of the backlight unit 40. As shown in FIG.
  • FIG. 5 is a cross-sectional view of the backlight unit 40. As shown in FIG.
  • the backlight unit 40 includes a light source substrate 50, a lens 51, a lens case 52, a heat sink 53, and a heat conduction sheet 54.
  • a light source 56 is mounted on the light source substrate 50.
  • the light source 56 is made of a light emitting element such as a light emitting diode (LED) and emits a light beam.
  • the light source substrate 50 is, for example, an alumina (ceramics) substrate excellent in thermal conductivity.
  • the lens 51 condenses the light beam emitted from the light source 56 and collimates it with respect to the optical axis of the HUD 1.
  • the lens 51 makes one lens portion 51 a correspond to one light source 56.
  • the lens 51 has a plurality of lens portions 51 a.
  • the lens case 52 is a cylindrical case formed of an impermeable resin material.
  • the lens case 52 is attached to the heat sink 53, and accommodates the light source substrate 50 and the lens 51. Further, the lens case 52 guides parallel light emitted from the lens 51 to the liquid crystal display panel 41.
  • the lens case 52 has an open end 52 a facing the mounting surface 53 c when installed on the heat sink 53.
  • the heat sink 53 is provided at the opening 28 of the case 6 (lower case 22).
  • the heat sink 53 is formed of, for example, a metal such as aluminum.
  • the heat sink 53 releases the heat generated by the light source 56 in the fins 53a to the air.
  • the heat sink 53 has a light shielding wall 53d on the installation surface 53c.
  • the light shielding wall 53 d is provided to cover the periphery of the lens case 52.
  • the light shielding wall 53d has a height equal to or greater than the distance between the installation surface 53c and the opening end 52a.
  • the light shielding wall 53 d prevents the light beam of the light source 56 from leaking from the opening end 52 a of the lens case 52.
  • the light shielding wall 53d does not have to be provided all around the lens case 52, and in particular, may be provided in a portion where the opening is large or a portion which can be provided in relation to other members.
  • the heat transfer sheet 54 is provided between the light source substrate 50 and the heat sink 53, and efficiently transfers the heat of the light source 56 to the heat sink 53.
  • the liquid crystal display panel 41 (FIG. 2) has a liquid crystal cell and a polarizing plate.
  • the liquid crystal cell has a pair of light transmitting substrates on which a transparent electrode film is formed, and a liquid crystal layer sealed in the light transmitting substrate.
  • the polarizing plates are attached to the front and back of the liquid crystal cell. The light beam that has become parallel light from the lens 51 is transmitted through the liquid crystal display panel 41 and output as display light.
  • the plane mirror 4 (reflecting mirror) has, for example, a base made of a synthetic resin material, and a reflective film formed on the surface of the base by vapor deposition or the like.
  • the flat mirror 4 reflects the display light output from the display device 3 toward the concave mirror 5.
  • the concave mirror 5 (reflecting mirror) has, for example, a base made of a synthetic resin material and a reflective film formed on the surface of the base by means such as vapor deposition.
  • the concave mirror 5 reflects the display light reflected by the plane mirror 4 toward the windshield.
  • the concave mirror 5 has a function as a magnifier, magnifies the display image and reflects it to the windshield. Thereby, the viewer visually recognizes the virtual image in which the display image is enlarged. Further, the concave mirror 5 corrects the distortion of display light due to the curved surface of the windshield with a concave curved surface.
  • the concave mirror 5 is rotated about the rotation axis by an actuator, although detailed illustration is omitted here, for example.
  • the actuator adjusts the angle of the concave mirror 5 by rotating the concave mirror 5 to adjust the irradiation position of the display light, or adjusts the angle at which external light is not reflected by the concave mirror 5 toward the display device 3.
  • the case 6 (FIG. 1) is formed of, for example, a synthetic resin having a light shielding property of black, and has an upper case 21 and a lower case 22.
  • the case 6 has an internal space 23 that accommodates the display device 3, the plane mirror 4, and the concave mirror 5 by combining the upper case 21 and the lower case 22.
  • the upper case 21 has an opening 27.
  • the opening 27 is provided in a portion facing the windshield.
  • the opening 27 is covered by a translucent cover 30 as a translucent emitting part. That is, this means that the upper case 21 has the light transmitting cover 30 for emitting the display light to the front glass.
  • the lower case 22 is formed in a box shape having a bottom, and has a structure for mainly attaching the display device 3, the plane mirror 4, the concave mirror 5, and the control substrate 7.
  • the control board 7 is a printed circuit board on which a control unit (not shown) for controlling the operation of the display device 3 or the like is mounted.
  • the control unit includes, for example, a microcomputer having a storage device and an arithmetic device.
  • the control unit causes the display device 3 to display a display image by the computing device appropriately computing according to the operation program stored in advance by the storage device based on various types of vehicle information acquired from the in-vehicle network and various sensors.
  • the control substrate 7 is fixed to the lower case 22 along with the substrate cover 31 on the outer surface 29 outside the internal space 23 of the lower case 22.
  • FIG. 6 is a cross-sectional view for explaining the positioning of the backlight unit 40. As shown in FIG.
  • FIG. 7 is a rear perspective view for explaining the lens 51. As shown in FIG.
  • FIG. 8 is a perspective view when the heat conduction sheet 54 is installed on the heat sink 53.
  • the lens case 52 covers the lens 51, the light source substrate 50, and the heat conduction sheet 54 after the lens 51, the light source substrate 50, and the heat conduction sheet 54 are positioned and fixed to the heat sink 53. By being fixed by a screw, it is assembled as one unit.
  • the lens 51, the light source substrate 50, the thermally conductive sheet 54, and the heat sink 53 have a structure for positioning.
  • the light source substrate 50 has a first positioning hole 60 (hereinafter simply referred to as “a hole 60 in the substrate”).
  • the hole 60 in the substrate penetrates the light source substrate 50.
  • the heat sink 53 has a second positioning hole 61 (hereinafter simply referred to as "the hole 61 of the heat sink”).
  • the hole 61 of the heat sink has a thick hole 61a and a narrow hole 61b in order from the opening side.
  • the heat sink 53 has a positioning wall 53b for positioning the heat conduction sheet 54 and the light source substrate 50 in the surface direction of the installation surface 53c on the installation surface 53c on which the heat conduction sheet 54 and the light source substrate 50 are provided.
  • the heat conductive sheet 54 has a third positioning hole 62 (hereinafter simply referred to as "sheet hole 62").
  • sheet hole 62 The holes 62 in the sheet penetrate the heat conductive sheet 54.
  • the holes 62 of the sheet have a diameter larger than the holes 60 of the substrate and the holes 61 of the heat sink in consideration of the workability at the time of assembly.
  • the sheet hole 62 The heat sink hole 61 (thick hole 61a) is not concealed.
  • the holes 60 in the substrate, the holes 61 in the heat sink, and the holes 62 in the sheet are circular (elliptical).
  • the lens 51 has a hole 60 of the substrate, a hole 61 of the heat sink, and a positioning pin 65 having a circular cross-sectional shape, which is disposed substantially coaxially with the center of the hole 62 of the sheet.
  • the positioning pin 65 has a thick pin portion 65a, a thin pin portion 65b, and a tapered portion 65c.
  • the thick pin portion 65 a is provided on the root side of the positioning pin 65.
  • the thin pin portion 65 b is thinner than the thick pin portion 65 a and is provided on the tip end side of the positioning pin 65.
  • the tapered portion 65c connects the thick pin portion 65a and the thin pin portion 65b.
  • the positioning pin 65 has the thin pin portion 65 b, the tapered portion 65 c and the thick pin portion 65 a in order from the tip end side of the positioning pin 65.
  • the thin pin portion 65 b fits the thin hole portion 61 b of the hole 61 of the heat sink, thereby positioning the heat sink 53 and the lens 51.
  • the thick pin portion 65 a positions the lens 51 and the light source substrate 50 by fitting the hole 60 of the substrate.
  • the thick hole portion 61a is larger (thicker) than the hole 60 (thick pin portion 65a) of the substrate.
  • the backlight unit 40 having the configuration for such positioning is positioned as follows.
  • the heat conduction sheet 54 and the light source substrate 50 are sequentially disposed on the heat sink 53.
  • the heat sink 53 has a heat conducting sheet 54 and a positioning wall 53 b for positioning the light source substrate 50. For this reason, the heat conduction sheet 54 and the light source substrate 50 are positioned on the installation surface 53c according to the positioning wall 53b, so that they are accurately positioned.
  • the positioning pin 65 of the lens 51 is inserted into the hole 61 of the heat sink through the hole 60 of the substrate and the hole 62 of the sheet.
  • the heat conduction sheet 54 is accurately positioned by the positioning wall 53b. Therefore, the heat conduction sheet 54 does not inhibit the insertion of the positioning pin 65.
  • an assembly error may occur, and the heat conductive sheet 54 may move in a slight gap between the positioning wall 53 b and the center of the hole 62 of the sheet and the hole 61 of the heat sink.
  • the holes 62 of the sheet are larger than the holes 61 of the heat sink so that the holes 62 of the sheet do not hide the holes 61 of the heat sink (the thick holes 61a and the narrow holes 61b). Therefore, the heat conduction sheet 54 does not inhibit the insertion of the positioning pin 65.
  • the positioning pin 65 is inserted into the hole 61 of the heat sink, the narrow pin portion 65b is inserted into and fitted to the narrow hole portion 61b, and the lens 51 and the heat sink 53 are correctly positioned.
  • the tapered portion 65c located in the hole 60 of the substrate slides the light source substrate 50 to guide it to the correct position.
  • the thick pin portion 65a is inserted into and fitted in the hole 60 of the substrate, and the lens 51 and the light source substrate 50 are correctly positioned. That is, by inserting the positioning pin 65 into the hole 61 of the heat sink, the positions of the light source substrate 50 and the lens 51 are determined, and at the same time, the positions of the lens 51 and the heat sink 53 are determined. For this reason, even if assembly errors occur and the centers of the holes 60 of the substrate and the holes 61 of the heat sink shift, the assembly operation is easy.
  • the backlight unit 40 and the HUD 1 in this embodiment can improve the manufacturability by improving the workability at the time of assembly. That is, the heat sink 53 has a positioning wall 53b. Thereby, the worker can arrange the heat conduction sheet 54 and the light source substrate 50 on the heat sink 53 easily and accurately. Further, since the holes 62 of the sheet, the holes 60 of the substrate, and the holes 61 of the heat sink are accurately arranged, the operator can easily insert the positioning pin 65.
  • the heat sink 53 has a light shielding wall 53d.
  • the light blocking wall 53 d can block light leaking from the opening end 52 a of the lens case 52. For this reason, HUD 1 in this embodiment can display a display image correctly, without making light other than the light of a display image approach into the optical path of a display image.
  • FIG. 9 is a plan view of relevant parts showing the display device 3, the heat sink 53 and a wall portion of the upper case 21 described later in FIG. 2 in a simplified manner.
  • FIG. 10 is a side view of an essential part of the upper case 21. As shown in FIG.
  • the lower case 22 has a peripheral wall 22a as one side wall provided so as to overlap the heat sink 53.
  • the peripheral wall 22a has a base 22b in the form of an upright wall of a thin plate, which is the main part, and a gap S1 between the base 22b and the heat sink 53 with a minute clearance (two locations). It has the above-mentioned opening (opening) 28 which enables the fin 53a which is a required part of 53 to be exposed to the outside of the lower case 22.
  • the opening 28 here is a cutaway portion in which the base portion 22 b corresponding to the heat sink 53 is cut out.
  • Reference numeral 53 e denotes a pair of wedge-shaped fixing portions provided around the heat sink 53.
  • the fixing portion 53e has, for example, a screw fixing structure for screwing the lower case 22 and the heat sink 53, a positioning structure for positioning the lower case 22 and the heat sink 53, etc. Provided.
  • the liquid crystal display panel 41 is not in close contact with the lens case 52, and the liquid crystal display panel 41 and the lens case 52 And a space S2 is formed between them.
  • the outgoing light (light beam) emitted from the lens unit 51a (lens 51) travels to the liquid crystal display panel 41, passes through the space S2, and is outside the lens case 52. And leaked light.
  • Reference numeral 52 b denotes an opening window partially provided in the vicinity of the opening end 52 a of the lens case 52, and the opening window 52 b is formed to correspond to the connector 50 a mounted on the light source substrate 50. Then, although not shown in detail here, one connector of the pair of connectors mounted on both ends of the wiring cord is connected to the connector 50a through the opening window 52b, and the other connector is connected to the control board 7 By connecting the connector, the light source 56 can be supplied with lighting power.
  • 21a is a rib-shaped (two) wall portion formed on the upper case 21 provided to be paired with the lower case 22.
  • the wall portion 21a provided so as to hang from the upper case 21 is located inside the base portion 22b (the gap portion S1) so as to close the above-mentioned (two) gap portions S1, and a space is formed through a predetermined light path. It has a function as a light shielding wall (light shielding rib) for shielding the leakage light and the like from the portion S2 to the gap portion S1.
  • the predetermined optical path for example, an optical path of light reflected toward the lower case 22 through the inner wall surface of the upper case 21 facing the space portion S2 and the inner space 23 side sequentially to the lower case 22 is listed. be able to.
  • a part of the light beam from the light source 56 leaks from the opening window 52b of the lens case 52, for example, and is reflected to the lower case 22 by the inner wall surface of the upper case 21
  • the wall 21a is formed on the upper case 21 so as to close the gap S1, the leaked light and the lens case The light leaked from the opening window 52b of 52 and directed to the gap S1 can be surely blocked by the wall 21a. Therefore, when the light source 56 is lit, it is possible to reliably prevent the light beam emitted from the light source 56 from leaking to the outside of the HUD 1 and to improve the commercial property.
  • HUD Head-up display
  • Reference Signs List 3 display device 4 plane mirror 5 concave mirror 6 case 7 control board 21 upper case 21 a wall portion (light shielding wall) 22 lower case 22a peripheral wall 22b base 28 opening (opening) 30 Translucent cover (emitting part) DESCRIPTION OF SYMBOLS 40 Backlight unit 41 Liquid crystal display panel 50 Light source substrate 51 Lens 52 Lens case 52a Opening end 53 Heat sink 53b Positioning wall 53c Installation surface 53d Light shielding wall 54 Heat conduction sheet 56 Light source 60 1st positioning hole (hole of substrate) 61 2nd positioning hole (hole of heat sink) 62 3rd positioning hole (hole in sheet) 65 Positioning pin S1 Gap S2 Space

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Geometry (AREA)
  • Instrument Panels (AREA)
  • Liquid Crystal (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Planar Illumination Modules (AREA)

Abstract

La présente invention concerne une unité de rétroéclairage comprenant : un substrat sur lequel une source de lumière est montée ; une feuille thermoconductrice (54) qui conduit la chaleur provenant de la source de lumière ; et un dissipateur thermique (53). Le dissipateur thermique (53) rayonne la chaleur transmise par la feuille thermoconductrice (54), et a une surface d'installation (53c) sur laquelle le substrat et la feuille thermoconductrice (54) sont placées, et des parois de positionnement (53b) pour positionner le substrat et la feuille thermoconductrice (54) par rapport à la direction de surface de la surface d'installation (53c). De plus, le dissipateur thermique (53) a des parois de protection contre la lumière (53d) ayant chacune une hauteur qui est supérieure ou égale à la distance entre la surface d'installation (53c) et une extrémité d'ouverture d'un boîtier de lentille.
PCT/JP2018/024269 2017-06-30 2018-06-27 Unité de rétroéclairage et affichage tête haute WO2019004239A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019526956A JP7100811B2 (ja) 2017-06-30 2018-06-27 バックライトユニット及びヘッドアップディスプレイ

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017128503 2017-06-30
JP2017-128503 2017-06-30
JP2018006069 2018-01-18
JP2018-006069 2018-01-18

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WO2019004239A1 true WO2019004239A1 (fr) 2019-01-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2603039A (en) * 2021-01-20 2022-07-27 Continental Automotive Gmbh Head-up display

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090154180A1 (en) * 2007-12-18 2009-06-18 Sl Seobong Heat-dissipating apparatus
JP2010006196A (ja) * 2008-06-26 2010-01-14 Nippon Seiki Co Ltd 発光表示装置
JP2012529145A (ja) * 2009-06-24 2012-11-15 エルポイント カンパニー，リミテッド モジュール回路基板とフレームの結合装置及びこれを用いたバックライト
JP2013004423A (ja) * 2011-06-20 2013-01-07 Koito Mfg Co Ltd 車輌用灯具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090154180A1 (en) * 2007-12-18 2009-06-18 Sl Seobong Heat-dissipating apparatus
JP2010006196A (ja) * 2008-06-26 2010-01-14 Nippon Seiki Co Ltd 発光表示装置
JP2012529145A (ja) * 2009-06-24 2012-11-15 エルポイント カンパニー，リミテッド モジュール回路基板とフレームの結合装置及びこれを用いたバックライト
JP2013004423A (ja) * 2011-06-20 2013-01-07 Koito Mfg Co Ltd 車輌用灯具

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2603039A (en) * 2021-01-20 2022-07-27 Continental Automotive Gmbh Head-up display

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JP7100811B2 (ja) 2022-07-14
JPWO2019004239A1 (ja) 2020-04-30

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