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WO2019176439A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2019176439A1
WO2019176439A1 PCT/JP2019/005490 JP2019005490W WO2019176439A1 WO 2019176439 A1 WO2019176439 A1 WO 2019176439A1 JP 2019005490 W JP2019005490 W JP 2019005490W WO 2019176439 A1 WO2019176439 A1 WO 2019176439A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light guide
sub
partition wall
display device
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2019/005490
Other languages
English (en)
Japanese (ja)
Inventor
昌幸 根本
竹内　和也
凌 滝澤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Seiki Co Ltd
Original Assignee
Nippon Seiki Co Ltd
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 Nippon Seiki Co Ltd filed Critical Nippon Seiki Co Ltd
Publication of WO2019176439A1 publication Critical patent/WO2019176439A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/213—Virtual instruments
    • 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
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/22—Display screens
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D7/00—Indicating measured values

Definitions

  • the present invention relates to a display device mounted on a vehicle or the like.
  • Segmented display is known.
  • a plurality of segments are formed by dividing a plurality of light sources by a partition wall, and information is formed by a combination of lighting of the segments.
  • the segment display adjacent light sources are separated by a partition wall.
  • a surface of the case facing the viewer is covered with a display plate having a light shielding layer having a width wider than the width of the partition wall so that the partition wall is not visible to the viewer. For this reason, when it is desired to reduce the distance between adjacent segments, the width of the partition wall and the width of the light shielding layer of the display panel may be reduced.
  • the thickness of the partition wall must be secured to about 1 mm. Don't be. For this reason, it was difficult to make the distance between the illumination areas smaller than 1 mm.
  • the present invention has been made in consideration of such circumstances, and an object thereof is to provide a display device capable of improving the appearance of segment display.
  • a display device is guided from a substrate having a plurality of light sources, a substrate-side opening that divides and surrounds each of the light sources, and is in contact with the substrate, and the substrate-side opening.
  • a partition wall having an emission side opening for emitting light from each of the light sources, and a display board arranged to face the emission side opening of the partition wall and displaying information when the light from the light source is transmitted And an incident surface that is disposed between the partition wall and the display plate and faces the substrate, and an exit surface that faces the display plate, and transmits light that passes through the partition wall to the incident surface
  • a light guide that leads from the light source to the exit surface, and the light guide has a plurality of sub light guides provided for each of the light sources and spaced apart by a gap, and the display plate A segment is formed by each light emitted from the exit surface of the sub light guide, and information is obtained. Shimesuru.
  • the appearance of segment display can be improved.
  • the front view of the display apparatus which is embodiment of the display apparatus which concerns on this invention. Sectional drawing which follows the II-II line
  • the perspective view of a light guide. (A) is a perspective view of a 1st light guide, (b) is a perspective view of a 2nd light guide.
  • the display device according to the present invention is mounted on a vehicle such as an automobile or a motorcycle, a ship, an agricultural machine, or a construction machine.
  • FIG. 1 is a front view of a display device 1 which is an embodiment of a display device according to the present invention.
  • FIG. 2 is a sectional view taken along line II-II in FIG.
  • FIG. 3 is a sectional view taken along line III-III in FIG.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG.
  • FIG. 5 is a view of the middle case 41 and the circuit board 14 as seen from the front side.
  • the display device mainly includes a speedometer 2 and a gauge 25 for displaying the remaining fuel amount.
  • front side (front side) means the near side in FIG. 1 and the upper side (display plate 13 side) in FIG.
  • Back side (rear side) means the back side in FIG. 1 and the lower side in FIG. 2 (circuit board 14 side).
  • the display device 1 mainly includes a pointer base 10, a pointer 11, a pointer driving unit (not shown), a display board 13, a circuit board 14, a light source 15, a light guide 16, and a case 17. Have.
  • the pointer driving unit is provided on the circuit board 14 and rotates the pointer shaft in accordance with the input vehicle traveling speed.
  • the pointer 11 is connected to the pointer shaft via the pointer base 10 and indicates the scale 21 (design) of the display plate 13 corresponding to the speed by rotating on a surface parallel to the surface of the display plate 13.
  • the display board 13 is provided on the front side of the light guide 16 and on the back side of the pointer 11. Specifically, the display panel 13 is disposed to face the emission side opening 45 b of the partition wall 45. The display board 13 displays information when the light from the light source 15 is transmitted.
  • the display board 13 has a base material and a design layer.
  • the substrate is, for example, a polycarbonate resin plate member having transparency (translucency).
  • the design layer is a printed layer printed with black light-shielding ink formed on the front side or the back side of the substrate.
  • the design layer has designs such as scales 21, numbers 22, characters 23, and symbols 24 formed in a letter shape.
  • the design is turned on when the light from the light source 15 irradiated from the back side of the display panel 13 is transmitted.
  • the display board 13 has a gauge 25 as a design representing the remaining amount of fuel.
  • the gauge 25 is a quadrangular design curved along the outer edge shape of the display panel 13.
  • the gauge 25 has eight segments 26a separated by a boundary 26b indicated by a dotted line shown in FIG.
  • the gauge 25 displays the remaining amount of fuel by turning on (transmitting light) the number of segments 26a corresponding to the remaining amount of fuel. That is, the gauge 25 (display board 13) forms the segment 26a with each light emitted from the emission surface 30b of the sub light guide 31 described later, and displays information.
  • the gauge 25 only the outer edge 25a is formed by the design layer, and the boundary 26b of each segment 26a is not formed by the design layer.
  • the circuit board 14 (substrate) mainly includes a pointer driving unit, a plurality of light sources 15, and a control unit including a driver of the light source 15 and the pointer driving unit.
  • the control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and executes predetermined arithmetic processing according to a program written in the ROM, for example.
  • the control unit acquires various types of vehicle information from an ECU (Electronic Control Unit) of the vehicle. Based on the acquired information, the control unit turns on the light source 15 and drives the pointer driving unit.
  • ECU Electronic Control Unit
  • the light source 15 is provided on the front surface of the circuit board 14.
  • the light source 15 is, for example, a top view type (upside light emission type) LED (Light Emitting Diode).
  • a plurality of light sources 15 are provided according to the number and positions of the designs of the display device 1.
  • a number (eight) of light sources 15 corresponding to the number of segments used in the gauge 25 are provided on the back side of the gauge 25.
  • the light guide 16 is made of a transparent resin such as polymethyl methacrylate resin (PMMA).
  • the light guide 16 has an incident surface 30 a that faces the circuit board 14 and an exit surface 30 b that faces the display panel 13.
  • the light guide 16 guides the light emitted from the light source 15 and passing through the partition wall 45 from the entrance surface 30a to the exit surface 30b.
  • the light guide 16 is disposed between the partition wall 45 (the middle case 41 having the partition wall 45) and the display panel 13. Further, the incident surface 30 a is disposed in the partition wall 45.
  • the light guide 16 overlaps the partition wall 45 (middle case 41), and the incident surface 30 a is more than the exit-side opening 45 b of the partition wall 45 (the tip 47 of the partition wall 45).
  • the exit surface 30 b is located on the front side of the exit side opening 45 b of the partition wall 45.
  • FIG. 6 is a perspective view of the light guide 16.
  • FIG. 7A is a perspective view of the first light guide 16a
  • FIG. 7B is a perspective view of the second light guide 16b.
  • the light guide 16 is provided for each light source 15 (a number corresponding to the number of the light sources 15), and has a plurality of sub light guides 31 separated by a gap 16d.
  • the sub light guide 31 has a side surface 30c that connects the entrance surface 30a and the exit surface 30b.
  • the side surface 30c is formed so that the incident angle of light in the light guide 16 incident on the side surface 30c is larger than the critical angle. That is, the side surface 30c totally reflects the light in the sub light guide 31 incident on the side surface 30c without being emitted.
  • the sub light guide 31 has a quadrangular pyramid shape in which the exit surface 30b has a larger area than the entrance surface 30a, and has an inverted trapezoidal cross section as shown in FIG.
  • the sub light guide 31 only needs to have the side surface 30c so that the incident angle of light in the light guide 16 incident on the side surface 30c facing the gap 16d is larger than the critical angle.
  • the light guide 16 includes a first light guide 16a and a second light guide 16b.
  • the first light guide 16 a includes a part of the sub light guides 31 a.
  • the sub light guide 31a is connected by the support part 32a.
  • the 2nd light guide 16b has the sublight guide 31b of other parts.
  • the sub light guide 31b is connected by the support part 32b.
  • the first light guide body 16a and the second light guide body 16b are combined with each other via the support portions 32a and 32b to form a light guide body 16.
  • the sub light guide 31a of the first light guide 16a and the sub light guide 31b of the second light guide 16b are combined so as to be adjacent to each other by forming a gap 16d. That is, the sub light guide 31a of the first light guide 16a and the sub light guide 31b of the second light guide 16b are alternately arranged.
  • the gap 16d is, for example, 0.2 mm to 0.3 mm.
  • the case 17 is made of a synthetic resin material, and includes a light-shielding white middle case 41, a light-shielding black lower case (not shown), and an upper case 42.
  • Middle case 41 supports display board 13, light guide 16, and circuit board 14.
  • the middle case 41 has a partition wall 45 that partitions and surrounds the light sources 15 and guides the emitted light.
  • the partition wall 45 forms a space with a cylindrical wall that divides the illumination (light emission) region of the light source 15, and light passes through this space from the back to the front.
  • the sub light guide 31 is provided for each section.
  • the partition wall 45 has a tapered tip 47.
  • the tip 47 has a thickness of 1 mm or less, for example.
  • the partition wall 45 needs to extend at least to the front surface side from the incident surface 30a of the sub light guide 31, it is only necessary to have a portion having a thickness of 1 mm on the front surface side from the incident surface 30a.
  • the thickness of the partition wall 45 closer to the tip 47 than the 1 mm thick portion is preferably 1 mm or less. Since the partition wall 45 has the tapered tip 47, the tip 47 can be prevented from being viewed as a shadow from the gap 16 d through the display plate 13. If a thickness of 1 mm is secured on the front side of the entrance surface 30a, there is no effect even if a short shot occurs on the tip 47 side during injection molding.
  • the partition wall 45 has a substrate side opening 45a and an emission side opening 45b.
  • the board side opening 45 a is in contact with the circuit board 14.
  • the emission side opening 45 b emits the light of each light source 15 guided from the substrate side opening 45 a toward the light guide 16.
  • the partition wall 45 is formed at a position corresponding to the boundary 26, that is, between the sub light guides 31 (between the sub light guide 31a and the sub light guide 31b).
  • the front end 47 of the partition wall 45 is formed so as to be positioned between the incident surface 30a and the exit surface 30b of the light guide 16, and faces the side surface 30c in a space formed by the side surface 30c and the back surface of the display panel 13. Is formed.
  • the upper case 42 (FIG. 1) fits with the lower case and forms the outer shape of the display device 1.
  • the upper case 42 has an opening 42a to which a cover 44 made of a translucent resin material is attached.
  • the boundary 26b of the segment 26a is formed by the gap 16d of the light guide 16, so that it can be made thinner than when the boundary 26b is formed by the tip 47 of the partition wall 45. .
  • the minimum thickness of the tip 47 needs to be about 1 mm. If the thickness of the tip 47 is set to be smaller than 1 mm, a short shot occurs and there is a possibility that the partition wall 45 having a desired dimension height (length in the front-rear direction) cannot be obtained. In this case, the tip 47 of the partition wall 45 does not function as the boundary 26b, and light leaks from the tip 47 toward the adjacent segment 26a.
  • the boundary 26b is formed by the gap 16d between the sub light guides 31. For this reason, the display device 1 can improve the degree of freedom in design without being restricted in manufacturing as compared with the case where the boundary 26 b is formed by the partition wall 45.
  • the display device 1 is configured such that the shape of the sub light guide 31 is a quadrangular pyramid, and the light incident on the side surface 30c is totally reflected. Thereby, the display apparatus 1 can transmit only the light emitted from the emission surface 30b from the display plate 13, and can express the boundary 26b clearly.
  • the incident surface 30 a of the sub light guide 31 is disposed in the partition wall 45. Therefore, all the light emitted from the emission side opening 45b of the partition wall 45 enters the light guide 16, and the light can be prevented from leaking out of the partition wall 45.
  • the light guide 16 was formed by combining a plurality of light guides 16a and 16b.
  • the display device. 1 can reduce the gap 16d.
  • the display device. 1 can reduce the gap 16d.
  • the thickness of the mold that forms the gap in order to reduce the gap between the sub light guides.
  • the mold strength cannot be secured, and the mold may be damaged.
  • the light guide 16 is composed of two or more parts, it is not necessary to realize the small gap 16d with one part, and thus the above problem does not occur.
  • the display device 1 according to the present embodiment can reduce the boundary 26b between the segments 26a, and can improve the appearance of the segment display.
  • the light guide 16 may be three or more light guides having at least one sub light guide 31.
  • the sub light guides 31 included in different light guides among the plurality of light guides are combined so as to be adjacent to each other by forming a gap 16d.
  • the design formed by the segment 26 a and the boundary 26 b may be numbers, letters, symbols, etc. in addition to the gauge 25.
  • the light source representing one segment 26a includes a combination of a plurality of light sources. That is, the present invention includes one in which one sub light guide 31 guides light from a plurality of light sources to one segment 26a.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Instrument Panels (AREA)
  • Details Of Measuring Devices (AREA)

Abstract

Afin de fournir un dispositif d'affichage pouvant améliorer l'aspect d'un affichage de segment, la présente invention comprend : un substrat (14) comportant plusieurs sources de lumière (15) ; des parois de séparation (45) qui entourent les sources de lumière (15) respectives et dont chacune présente une ouverture côté substrat (45a) qui est en contact avec le substrat (14) et une ouverture côté sortie (45b) pour émettre de la lumière de chaque source de lumière (15) guidée depuis l'ouverture côté substrat (45a) ; un panneau d'affichage (13) qui est disposé face aux ouvertures côté sortie (45b) des parois de séparation (45) et qui affiche des informations par l'intermédiaire de la transmission de la lumière provenant des sources de lumière (15) ; et un corps de guidage de lumière (16) qui est disposé entre les parois de séparation (45) et le panneau d'affichage (13), qui a une surface incidente (30a) faisant face au substrat (14) et une surface d'émission (30b) faisant face au panneau d'affichage (13), et qui guide la lumière passant à l'intérieur des parois de séparation (45) depuis la surface incidente (30a) vers la surface d'émission (30b). Le corps de guidage de lumière (16) comporte plusieurs corps de guidage de lumière secondaires (31) qui sont respectivement fournis pour les sources de lumière (15) et qui sont séparés les uns des autres par des espaces (16d), et le panneau d'affichage (13) affiche des informations en formant des segments avec la lumière respective émise depuis la surface d'émission (30b) de chaque corps de guidage secondaire (31).
PCT/JP2019/005490 2018-03-12 2019-02-15 Dispositif d'affichage Ceased WO2019176439A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-043688 2018-03-12
JP2018043688 2018-03-12

Publications (1)

Publication Number Publication Date
WO2019176439A1 true WO2019176439A1 (fr) 2019-09-19

Family

ID=67907569

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/005490 Ceased WO2019176439A1 (fr) 2018-03-12 2019-02-15 Dispositif d'affichage

Country Status (1)

Country Link
WO (1) WO2019176439A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021120622A (ja) * 2020-01-30 2021-08-19 日本精機株式会社 表示装置
EP4485434A1 (fr) * 2023-06-26 2025-01-01 Casio Computer Co., Ltd. Appareil d'affichage et instrument électronique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05257429A (ja) * 1992-03-16 1993-10-08 Fuji Electric Co Ltd 電子機器の表示灯取付け構造
JPH11101667A (ja) * 1997-09-26 1999-04-13 Yazaki Corp 立体目盛表示装置
JP2000502184A (ja) * 1995-12-19 2000-02-22 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 表示装置
JP2007127909A (ja) * 2005-11-07 2007-05-24 Meidensha Corp Ｌｅｄ表示器並びにｌｅｄ表示器の表面パネル及び遮光板
JP2012037570A (ja) * 2010-08-03 2012-02-23 Yazaki Corp 車両用表示装置のバックライト

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05257429A (ja) * 1992-03-16 1993-10-08 Fuji Electric Co Ltd 電子機器の表示灯取付け構造
JP2000502184A (ja) * 1995-12-19 2000-02-22 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 表示装置
JPH11101667A (ja) * 1997-09-26 1999-04-13 Yazaki Corp 立体目盛表示装置
JP2007127909A (ja) * 2005-11-07 2007-05-24 Meidensha Corp Ｌｅｄ表示器並びにｌｅｄ表示器の表面パネル及び遮光板
JP2012037570A (ja) * 2010-08-03 2012-02-23 Yazaki Corp 車両用表示装置のバックライト

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021120622A (ja) * 2020-01-30 2021-08-19 日本精機株式会社 表示装置
JP7327185B2 (ja) 2020-01-30 2023-08-16 日本精機株式会社 表示装置
EP4485434A1 (fr) * 2023-06-26 2025-01-01 Casio Computer Co., Ltd. Appareil d'affichage et instrument électronique

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