WO2019176439A1 - Display device - Google Patents

Display device 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
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WO
WIPO (PCT)
Prior art keywords
light
light guide
sub
partition wall
display device
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Application number
PCT/JP2019/005490
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French (fr)
Japanese (ja)
Inventor
昌幸 根本
竹内　和也
凌 滝澤
Original Assignee
日本精機株式会社
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Publication of WO2019176439A1 publication Critical patent/WO2019176439A1/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—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • 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)
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  • Details Of Measuring Devices (AREA)

Abstract

In order to provide a display device capable of improving the appearance of a segment display, the present invention has: a substrate 14 having a plurality of light sources 15; partition walls 45 which partitively surround respective light sources 15 and each of which has a substrate-side opening 45a being in contact with the substrate 14 and an output-side opening 45b for outputting light of each light source 15 guided from the substrate-side opening 45a; a display plate 13 that is disposed facing the output-side openings 45b of the partition walls 45 and that displays information through the transmission of the light from the light sources 15; and a light guide body 16 that is arranged between the partitions walls 45 and the display plate 13, that has an incident surface 30a facing the substrate 14 and an emission surface 30b facing the display plate 13, and that guides the light that passes inside the partition walls 45 from the incident surface 30a to the emission surface 30b. The light guide body 16 has a plurality of sub light guide bodies 31 which are respectively provided for the light sources 15 and are separated from each other by gaps 16d, and the display plate 13 displays information by forming segments with the respective light outputted from the emission surface 30b of each sub guide body 31.

Description

表示装置Display device
　本発明は、車両などに搭載される表示装置に関する。 The present invention relates to a display device mounted on a vehicle or the like.
　自動車などの車両には、速度計、エンジン回転計などの運転に必要な情報を表示する表示装置が搭載されている。このような表示装置の表示方法の一つとして、セグメント表示が知られている。セグメント表示は、複数の光源を仕切壁で区切ることにより複数のセグメントを形成し、そのセグメントの点灯の組み合わせにより情報を形成する。 Vehicles such as automobiles are equipped with a display device for displaying information necessary for driving such as a speedometer and an engine tachometer. As one of the display methods of such a display device, segment display is known. In the segment display, 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.
特開２０１５－１５２５３７号公報Japanese Patent Laying-Open No. 2015-152537
　セグメント表示は、隣接する光源間を仕切壁で区切っている。また、この仕切壁が視認者から視認されないよう、仕切壁の幅よりも太い幅の遮光層を有する表示板で、ケースの視認者と対向する面を覆う。このような事情から、隣接するセグメント間の距離を小さくしたい場合には、仕切壁の幅及び表示板の遮光層の幅を小さくすればよい。 In the segment display, adjacent light sources are separated by a partition wall. In addition, 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.
　しかし、ケースが射出成形で形成される場合、ショートショット（成形品の一部が欠け、不完全な形状の成形品を生ずる現象）を考慮すると、仕切壁の厚さは１ｍｍ程度確保しなければならない。このため、照明領域間の距離を１ｍｍよりも小さくすることが困難であった。 However, when the case is formed by injection molding, considering the short shot (a phenomenon in which a part of the molded product is missing and an incompletely shaped product is formed), 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.
　本発明はこのような事情を考慮してなされたもので、セグメント表示の外観を向上させることができる表示装置を提供することを目的とする。 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.
　本発明に係る表示装置は、上述した課題を解決するために、複数の光源を有する基板と、各前記光源を区画して囲い、前記基板と接する基板側開口と、前記基板側開口から導かれた前記各光源の光を出射する出射側開口と、を有する仕切壁と、前記仕切壁の前記出射側開口に対向して配置され、前記光源の光が透過することにより情報を表示する表示板と、前記仕切壁と前記表示板との間に配置され、前記基板に対向する入射面と、前記表示板に対向する出射面とを有し、前記仕切壁内を通過する光を前記入射面から前記出射面まで導く導光体と、と有し、前記導光体は、前記光源毎に設けられ、隙間で離間された複数のサブ導光体を有し、前記表示板は、各前記サブ導光体の前記出射面から出射した各光でセグメントを形成して、情報を表示する。 In order to solve the problems described above, a display device according to the present invention 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.
　本発明に係る表示装置においては、セグメント表示の外観を向上させることができる。 In the display device according to the present invention, the appearance of segment display can be improved.
本発明に係る表示装置の実施形態である表示装置の正面図。The front view of the display apparatus which is embodiment of the display apparatus which concerns on this invention. 図１のII－II線に沿う断面図。Sectional drawing which follows the II-II line | wire of FIG. 図１のIII－III線に沿う断面図。Sectional drawing which follows the III-III line | wire of FIG. 図１のIV－IV線に沿う断面図。Sectional drawing which follows the IV-IV line of FIG. 中ケース及び回路基板を前面側から見た図。The figure which looked at the middle case and the circuit board from the front side. 導光体の斜視図。The perspective view of a light guide. （ａ）は第１導光体の斜視図であり、（ｂ）は第２導光体の斜視図。(A) is a perspective view of a 1st light guide, (b) is a perspective view of a 2nd light guide.
　本発明に係る表示装置の実施形態を添付図面に基づいて説明する。本発明に係る表示装置は、例えば自動車や二輪車などの車両や、船舶、農業機械、建設機械に搭載される。 Embodiments of a display device according to the present invention will be described with reference to the accompanying drawings. 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.
　図１は、本発明に係る表示装置の実施形態である表示装置１の正面図である。 FIG. 1 is a front view of a display device 1 which is an embodiment of a display device according to the present invention.
　図２は、図１のII－II線に沿う断面図である。 FIG. 2 is a sectional view taken along line II-II in FIG.
　図３は、図１のIII－III線に沿う断面図である。 FIG. 3 is a sectional view taken along line III-III in FIG.
　図４は、図１のIV－IV線に沿う断面図である。 FIG. 4 is a sectional view taken along line IV-IV in FIG.
　図５は、中ケース４１及び回路基板１４を前面側から見た図である。 FIG. 5 is a view of the middle case 41 and the circuit board 14 as seen from the front side.
　本実施形態においては、表示装置が、速度計２及び燃料残量を表示するゲージ２５を主に有している例を用いて説明する。
　以下の説明において、「前面側（前側）」は、図１における手前側、及び図２における上側（表示板１３側）であり視認者に視認される側を意味する。「背面側（後側）」は、図１における奥側、及び図２における下側（回路基板１４側）を意味する。 In the present embodiment, description will be made using an example in which the display device mainly includes a speedometer 2 and a gauge 25 for displaying the remaining fuel amount.
In the following description, “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).
　表示装置１は、指針基部１０と、指針１１と、指針駆動部（図示せず）と、表示板１３と、回路基板１４と、光源１５と、導光体１６と、ケース１７と、を主に有している。 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.
　指針駆動部は、回路基板１４に設けられており、入力された車両の走行速度に応じて指針軸を回転する。指針１１は、指針基部１０を介して指針軸に接続されており、表示板１３の面に平行する面上を回転することにより、速度に対応する表示板１３の目盛２１（意匠）を指し示す。 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.
　表示板１３は、導光体１６の前面側であり、指針１１の背面側に設けられている。具体的には、表示板１３は、仕切壁４５の出射側開口４５ｂに対向して配置されている。表示板１３は、光源１５の光が透過することにより情報を表示する。表示板１３は、基材と、意匠層と、を有している。基材は、例えば透過性（透光性）を有するポリカーボネート樹脂の板状部材である。意匠層は、基材の前面側または背面側に形成された黒色の遮光性インキで印刷された印刷層である。 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.
　意匠層は、抜き文字状に形成された目盛２１、数字２２、文字２３及び記号２４などの意匠を有している。意匠は、表示板１３の背面側から照射された光源１５の光が透過することにより、点灯表示される。 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.
　本実施形態においては、表示板１３は、特に、燃料の残量を表す意匠として、ゲージ２５を有している。ゲージ２５は、表示板１３の外縁形状に沿って湾曲した四角形状の意匠である。ゲージ２５は、図１に示す点線で示された境界２６ｂで区切られた８つのセグメント２６ａを有している。ゲージ２５は、燃料の残量に応じた数のセグメント２６ａを点灯（光が透過）することにより、燃料の残量を表示する。すなわち、ゲージ２５（表示板１３）は、後述するサブ導光体３１の出射面３０ｂから出射した各光でセグメント２６ａを形成し、情報を表示する。ゲージ２５は、外縁２５ａのみが意匠層により形成されており、各セグメント２６ａの境界２６ｂは意匠層により形成されてはいない。 In the present embodiment, 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. In 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.
　回路基板１４（基板）は、指針駆動部と、複数の光源１５と、光源１５や指針駆動部のドライバなどを含む制御部と、を主に有している。 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.
　制御部は、ＣＰＵ（Central Processing Unit）、ＲＯＭ（Read Only Memory）、ＲＡＭ（Random Access Memory）などを有しており、例えば、ＲＯＭに書き込まれたプログラムに従って所定の演算処理を実行する。制御部は、例えば、車両のＥＣＵ（Electronic Control Unit）から各種車両情報を取得する。制御部は、取得した情報に基づき、光源１５を点灯させ、また、指針駆動部を駆動する。 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. 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.
　光源１５は、回路基板１４の前面に設けられている。光源１５は、例えばトップビュー型（上面発光型）のＬＥＤ（Light Emitting Diode）である。光源１５は、表示装置１の意匠の数及び位置に応じて、複数個設けられている。特に、ゲージ２５を表示するために、ゲージ２５で用いられるセグメント数に対応した数（８個）の光源１５が、ゲージ２５の背面側に設けられている。 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. In particular, in order to display the gauge 25, 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.
　導光体１６は、ポリメタクリル酸メチル樹脂（Polymethyl methacrylate、ＰＭＭＡ）などの透明樹脂からなる。導光体１６は、回路基板１４に対向する入射面３０ａと、表示板１３に対向する出射面３０ｂとを有している。導光体１６は、光源１５が出射し、仕切壁４５内を通過する光を入射面３０ａから出射面３０ｂまで導く。導光体１６は、図２から図４に示すように、仕切壁４５（を有する中ケース４１）と表示板１３との間に配置されている。また、入射面３０ａは、仕切壁４５内に配置されている。すなわち、表示装置１の前後方向において、導光体１６は仕切壁４５（中ケース４１）と重なっており、入射面３０ａは仕切壁４５の出射側開口４５ｂ（仕切壁４５の先端４７）よりも背面側に位置し、出射面３０ｂは仕切壁４５の出射側開口４５ｂよりも前面側に位置する。 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. As shown in FIGS. 2 to 4, 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. That is, in the front-rear direction of the display device 1, 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). Located on the back side, the exit surface 30 b is located on the front side of the exit side opening 45 b of the partition wall 45.
　ここで、図６は、導光体１６の斜視図である。図７（ａ）は第１導光体１６ａの斜視図であり、（ｂ）は第２導光体１６ｂの斜視図である。 Here, FIG. 6 is a perspective view of the light guide 16. FIG. 7A is a perspective view of the first light guide 16a, and FIG. 7B is a perspective view of the second light guide 16b.
　導光体１６は、光源１５毎に（光源１５の数に対応する数）設けられ、隙間１６ｄで離間された複数のサブ導光体３１を有している。サブ導光体３１は、入射面３０ａと出射面３０ｂとをつなぐ側面３０ｃを有している。側面３０ｃは、側面３０ｃへ入射する導光体１６内の光の入射角が、臨界角より大きくなるように形成されている。すなわち、側面３０ｃは、側面３０ｃへ入射するサブ導光体３１内の光を、出射することなく全反射する。例えば、サブ導光体３１は、出射面３０ｂが入射面３０ａよりも大きい面積を有する四角錐台形状を有し、図２に示すように、逆台形形状の断面を有する。なお、サブ導光体３１は、隙間１６ｄに面する側面３０ｃへ入射する導光体１６内の光の入射角が臨界角より大きくなるように、側面３０ｃが形成されていればよい。 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. For example, 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.
　また、導光体１６は、第１導光体１６ａと、第２導光体１６ｂと、からなる。第１導光体１６ａは、サブ導光体３１のうち、一部のサブ導光体３１ａを有している。サブ導光体３１ａは、支持部３２ａにより連結されている。第２導光体１６ｂは、他部のサブ導光体３１ｂを有している。サブ導光体３１ｂは、支持部３２ｂにより連結されている。 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.
　第１導光体１６ａ及び第２導光体１６ｂは、支持部３２ａ、３２ｂを介して組み合わせられることにより一体となり、導光体１６を形成する。第１導光体１６ａのサブ導光体３１ａ、及び第２導光体１６ｂのサブ導光体３１ｂは、隙間１６ｄを形成して隣り合うように組み合わせられている。すなわち、第１導光体１６ａのサブ導光体３１ａ、及び第２導光体１６ｂのサブ導光体３１ｂは、互い違いとなるように配置されている。隙間１６ｄは、例えば０．２ｍｍから０．３ｍｍである。 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.
　ケース１７は、合成樹脂材料からなり、遮光性の白色の中ケース４１と、遮光性の黒色の下ケース（図示せず）及び上ケース４２と、を有している。 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.
　中ケース４１は、表示板１３、導光体１６、及び回路基板１４を支持する。中ケース４１は、各光源１５を区画して囲い、出射された光を導く仕切壁４５を有している。仕切壁４５は、光源１５の照明（発光）領域を区切る筒状の壁で空間を形成しており、光はこの空間を背面から前面に向って通る。サブ導光体３１は、この区画毎に設けられている。仕切壁４５は、先細りした先端４７を有する。先端４７は、例えば厚さ１ｍｍ以下である。 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.
　なお、仕切壁４５は、少なくともサブ導光体３１の入射面３０ａよりも前面側にまで伸びている必要があるため、入射面３０ａよりも前面側において厚さが１ｍｍの部分があればよい。この厚さ１ｍｍ部分よりもさらに先端４７側の仕切壁４５の厚さは、１ｍｍ以下であることが好ましい。仕切壁４５は、先細りした先端４７を有することにより、表示板１３を介して隙間１６ｄから先端４７が影となり視認されてしまうことを防止することができる。なお、入射面３０ａよりも前面側において１ｍｍの厚さが確保されていれば、仮に射出成形時に先端４７側にショートショットが発生しても影響はない。 In addition, since 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.
　仕切壁４５は、基板側開口４５ａと、出射側開口４５ｂと、を有している。基板側開口４５ａは、回路基板１４と接している。出射側開口４５ｂは、基板側開口４５ａから導かれた各光源１５の光を導光体１６に向けて出射する。また、仕切壁４５は、境界２６に対応する位置、つまり、サブ導光体３１間（サブ導光体３１ａ、サブ導光体３１ｂの間）に形成される。仕切壁４５の先端４７は、導光体１６の入射面３０ａと出射面３０ｂの間に位置するように形成され、側面３０ｃ及び表示板１３の背面で形成される空間内に、側面３０ｃに面して形成されている。 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.
　上ケース４２（図１）は、下ケースと嵌まり合い、表示装置１の外形を形成する。また、上ケース４２は、透光性の樹脂材料からなるカバー４４が取り付けられる開口４２ａを有している。 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.
　このような本実施形態における表示装置１は、セグメント２６ａの境界２６ｂを導光体１６の隙間１６ｄで形成したため、仕切壁４５の先端４７で境界２６ｂを形成する場合に比べて細くすることができる。 In such a display device 1 according to the present embodiment, 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. .
　すなわち、仕切壁４５の先端４７で境界２６ｂを形成する場合、中ケース４１の射出成形時に発生するショートショットを考慮すると、先端４７の最小厚さは１ｍｍ程度で形成する必要がある。仮に先端４７の厚さを１ｍｍよりも小さく設定した場合、ショートショットが発生し、所望の寸法の高さ（前後方向長さ）を有する仕切壁４５が得られない虞がある。この場合、仕切壁４５の先端４７が境界２６ｂとして機能せず、先端４７から隣接するセグメント２６ａ方向に光が漏れてしまう。これに対し、本実施形態における表示装置１は、サブ導光体３１間の隙間１６ｄにより境界２６ｂを形成した。このため、仕切壁４５で境界２６ｂを形成する場合よりも製造上の制限を受けず、表示装置１はデザイン上の自由度を向上させることができる。 That is, when the boundary 26 b is formed by the tip 47 of the partition wall 45, in consideration of a short shot that occurs during the injection molding of the middle case 41, 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. On the other hand, in the display device 1 according to the present embodiment, 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.
　また、サブ導光体３１間（サブ導光体３１ａ、サブ導光体３１ｂの間）の前面側）を仕切壁４５で仕切らないため、導光体１６の側面３０ｃから光が漏れ出る虞がある。これに対しては、表示装置１は、サブ導光体３１の形状を四角錐台とし、側面３０ｃに入射する光が全反射するようにした。これにより、表示装置１は、出射面３０ｂから出射した光のみを表示板１３から透過させることができ、境界２６ｂを鮮明に表現することができる。 Moreover, since the partition wall 45 does not partition between the sub light guides 31 (the front side between the sub light guide 31a and the sub light guide 31b), light may leak from the side surface 30c of the light guide 16. is there. In response to this, 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.
　さらに、サブ導光体３１の入射面３０ａは、仕切壁４５内に配置された。これにより、仕切壁４５の出射側開口４５ｂから出射する光は全て導光体１６に入射し、仕切壁４５から光が漏れ出ることを防止することができる。 Furthermore, the incident surface 30 a of the sub light guide 31 is disposed in the partition wall 45. Thereby, 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.
　また、導光体１６は、複数の導光体１６ａ、１６ｂを組み合わせて一体とすることにより形成した。これにより１つの導光体（１部品としての導光体）に全てのサブ導光体３１を連結し、サブ導光体３１を隙間を形成して隣り合わせて配置する場合に比べて、表示装置１は隙間１６ｄを小さくすることができる。例えば、射出成形により１部品としての導光体を形成する場合、サブ導光体間の隙間を小さく形成するためには、隙間を形成する金型の肉厚を小さくする必要がある。この場合、肉厚が小さい部分においては、金型強度が確保できず、金型が破損する虞がある。これに対し、導光体１６が２以上の部品からなる場合には、１部品で小さな隙間１６ｄを実現する必要はないため、上記問題は発生することがない。 Moreover, the light guide 16 was formed by combining a plurality of light guides 16a and 16b. Thus, as compared with the case where all the sub light guides 31 are connected to one light guide (light guide as one component) and the sub light guides 31 are arranged adjacent to each other with a gap formed therebetween, the display device. 1 can reduce the gap 16d. For example, when forming a light guide as one component by injection molding, it is necessary to reduce the thickness of the mold that forms the gap in order to reduce the gap between the sub light guides. In this case, in the portion where the wall thickness is small, the mold strength cannot be secured, and the mold may be damaged. On the other hand, when 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.
　よって、本実施形態における表示装置１は、セグメント２６ａ間の境界２６ｂを小さくすることができ、セグメント表示の外観を向上させることができる。 Therefore, 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.
　本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
　例えば、導光体１６は、少なくとも一のサブ導光体３１を有する３以上の複数の導光体であってもよい。この場合、複数の導光体のうち異なる導光体が有するサブ導光体３１同士が、隙間１６ｄを形成して隣り合うように組み合わせられている。 For example, the light guide 16 may be three or more light guides having at least one sub light guide 31. In this case, 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.
　セグメント２６ａ及び境界２６ｂが形成する意匠は、ゲージ２５以外にも数字、文字、記号等であってもよい。 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.
　一つのセグメント２６ａを表す光源は、複数の光源の組み合わせである場合も含む。すなわち、本発明は、一つのサブ導光体３１が、複数の光源の光を一つのセグメント２６ａへ導くものも含む。 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.
１　表示装置
２　速度計
１０　指針基部
１１　指針
１３　表示板
１４　回路基板
１５　光源
１６　導光体
１６ａ　第１導光体
１６ｂ　第２導光体
１６ｄ　隙間
１７　ケース
２１　目盛
２２　数字
２３　文字
２５　ゲージ
２５ａ　外縁
２６ａ　セグメント
２６ｂ　境界
３０ａ　入射面
３０ｂ　出射面
３０ｃ　側面
３１、３１ａ、３１ｂ　サブ導光体
３２ａ、３２ｂ　支持部
４１　中ケース
４２　上ケース
４２ａ　開口
４４　カバー
４５　仕切壁
４５ａ　基板側開口
４５ｂ　出射側開口
４７　先端 DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Speedometer 10 Pointer base 11 Pointer 13 Display board 14 Circuit board 15 Light source 16 Light guide 16a First light guide 16b Second light guide 16d Crevice 17 Case 21 Scale 22 Number 23 Character 25 Gauge 25a Outer edge 26a Segment 26b Boundary 30a Incident surface 30b Emission surface 30c Side surfaces 31, 31a, 31b Sub light guides 32a, 32b Support portion 41 Middle case 42 Upper case 42a Opening 44 Cover 45 Partition wall 45a Substrate side opening 45b Outgoing side opening 47 Tip

Claims (7)

  1. 　複数の光源を有する基板と、
    　各前記光源を区画して囲い、前記基板と接する基板側開口と、前記基板側開口から導かれた前記各光源の光を出射する出射側開口と、を有する仕切壁と、
    　前記仕切壁の前記出射側開口に対向して配置され、前記光源の光が透過することにより情報を表示する表示板と、
    　前記仕切壁と前記表示板との間に配置され、前記基板に対向する入射面と、前記表示板に対向する出射面とを有し、前記仕切壁内を通過する光を前記入射面から前記出射面まで導く導光体と、と有し、
    　前記導光体は、前記区画毎に設けられ、隙間で離間された複数のサブ導光体を有し、
    　前記表示板は、各前記サブ導光体の前記出射面から出射した各光でセグメントを形成して、情報を表示する、表示装置。     A substrate having a plurality of light sources;
    A partition wall that partitions and surrounds each of the light sources, and has a substrate-side opening in contact with the substrate, and an emission-side opening that emits light of each light source guided from the substrate-side opening;
    A display plate that is disposed to face the emission side opening of the partition wall and displays information by transmitting light from the light source;
    The light source is disposed between the partition wall and the display plate, has an incident surface facing the substrate, and an output surface facing the display plate, and transmits light passing through the partition wall from the incident surface. A light guide that leads to the exit surface;
    The light guide has a plurality of sub light guides provided for each of the sections and separated by a gap,
    The display device is configured to display information by forming a segment with each light emitted from the emission surface of each of the sub light guides.
  2. 　前記サブ導光体は、前記入射面と前記出射面とをつなぐ側面を有し、
    　前記側面は、前記側面へ入射する前記導光体内の光の入射角が臨界角より大きくなるように形成された、請求項１記載の表示装置。     The sub light guide has a side surface connecting the incident surface and the exit surface,
    The display device according to claim 1, wherein the side surface is formed such that an incident angle of light in the light guide that enters the side surface is larger than a critical angle.
  3. 　前記サブ導光体は、前記出射面が前記入射面よりも大きい面積を有する錐台形状を有する請求項２記載の表示装置。 The display device according to claim 2, wherein the sub light guide has a frustum shape in which the exit surface has a larger area than the entrance surface.
  4. 　前記入射面は、前記仕切壁内に配置された、請求項１記載の表示装置。 The display device according to claim 1, wherein the incident surface is disposed in the partition wall.
  5. 　前記仕切壁は、先細りした先端を有する、請求項２記載の表示装置。 The display device according to claim 2, wherein the partition wall has a tapered tip.
  6. 　前記導光体は、一部の前記サブ導光体を有する第１導光体と、他部の前記サブ導光体を有する第２導光体とを有し、前記第１導光体の前記サブ導光体、及び前記第２導光体の前記サブ導光体が前記隙間を形成して隣り合うように組み合わせられている、請求項１から５のいずれか一項記載の表示装置。 The light guide includes a first light guide having a part of the sub light guide and a second light guide having the sub light guide of another part, and the first light guide. 6. The display device according to claim 1, wherein the sub light guide and the sub light guide of the second light guide are combined so as to form the gap and are adjacent to each other.
  7. 　前記導光体は、少なくとも一の前記サブ導光体を有する複数の導光体からなり、前記複数の導光体のうち異なる前記導光体が有する前記サブ導光体同士が前記隙間を形成して隣り合うように組み合わせられている、請求項１から５のいずれか一項記載の表示装置。 The light guide includes a plurality of light guides having at least one sub light guide, and the sub light guides of different light guides among the plurality of light guides form the gap. The display device according to claim 1, wherein the display devices are combined so as to be adjacent to each other.
PCT/JP2019/005490 2018-03-12 2019-02-15 Display device WO2019176439A1 (en)

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JPH11101667A (en) * 1997-09-26 1999-04-13 Yazaki Corp Stereoscopic scale display device
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JP2007127909A (en) * 2005-11-07 2007-05-24 Meidensha Corp Led indicator, surface panel of led indicator, and light shielding plate
JP2012037570A (en) * 2010-08-03 2012-02-23 Yazaki Corp Backlight of display for vehicle

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Publication number Priority date Publication date Assignee Title
JPH05257429A (en) * 1992-03-16 1993-10-08 Fuji Electric Co Ltd Structure for mounting of pilot lamp of electronic appliance
JP2000502184A (en) * 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 Display device
JPH11101667A (en) * 1997-09-26 1999-04-13 Yazaki Corp Stereoscopic scale display device
JP2007127909A (en) * 2005-11-07 2007-05-24 Meidensha Corp Led indicator, surface panel of led indicator, and light shielding plate
JP2012037570A (en) * 2010-08-03 2012-02-23 Yazaki Corp Backlight of display for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021120622A (en) * 2020-01-30 2021-08-19 日本精機株式会社 Display device
JP7327185B2 (en) 2020-01-30 2023-08-16 日本精機株式会社 Display device

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