JP2004301687A - Display device - Google Patents

Display device Download PDF

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Publication number
JP2004301687A
JP2004301687A JP2003095414A JP2003095414A JP2004301687A JP 2004301687 A JP2004301687 A JP 2004301687A JP 2003095414 A JP2003095414 A JP 2003095414A JP 2003095414 A JP2003095414 A JP 2003095414A JP 2004301687 A JP2004301687 A JP 2004301687A
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JP
Japan
Prior art keywords
display
light
colorless
transparent
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.)
Pending
Application number
JP2003095414A
Other languages
Japanese (ja)
Inventor
Norihiro Tamura
則広 田村
Takeshi Izumida
剛 泉田
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
Priority to JP2003095414A priority Critical patent/JP2004301687A/en
Publication of JP2004301687A publication Critical patent/JP2004301687A/en
Pending legal-status Critical Current

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  • Indicating Measured Values (AREA)
  • Details Of Measuring Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device having satisfactory visibility while maintaining a dark color tone. <P>SOLUTION: This display device is equipped with a display board 8 comprising an opaque ground-color layer provided on a transparent and colorless substrate and a display part formed by providing a removed part in the ground-color layer, a transparent and colorless cover member 15 for covering the front side of the display board 8, a transmissive semitransparent member 9 disposed behind the display board 8, and a light-emitting diode 10A disposed behind the semitransparent member 9 to transmissively light the display part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、例えば自動車やオートバイをはじめとする各種車両に搭載される表示装置に関し、特に透視可能な表示部を設けた表示板の背後に表示部を彩って視認させる半透明部材を配置した表示装置に関するものである。
【0002】
【従来の技術】
従来、この種の表示装置において、斬新さや高品質なイメージを与えるために表示装置の表示面を通常は暗色系としておいて、背後に配置した光源を点灯させた際に表示部が視認されるように構成したものとして、例えば特許文献1がある。特許文献1における指示計器(表示装置)の文字板5は、光透過性基板6の表面側に光を透過させる暗色系の地色層7を設けるとともに、光透過性基板6の裏面側に目盛2や数字3などの指標となる開口部101〜103を有する遮光層9を設けたものである。この様に構成することにより、通常は文字板5全面が暗色系で視認され、照明8点灯時には照明光が開口部101〜103を通って表面側に抜けて指標として明るく視認されるようになる。
【0003】
【特許文献1】
特開平11−105581号公報
【0004】
【発明が解決しようとする課題】
しかしながら、オープンカーなどにおいて太陽光が表示装置を直射した場合、強い直射光が暗色系の地色層7で反射することによって照明灯が点灯しているにも関わらず指標が見えにくくなる。また、特許文献1の図5に示す従来例は、地色の部分と指標類の部分とが同一の暗色調ではないものの指標部分も多少暗色系に視認されるということで、暗色調を実現する手法の一つでもある。しかし、この従来例においては、照明灯が点灯していない状態で外光によって指標である開口部から基板を通して指示計器の内部(文字板の背後)が透けてしまう。透けた状態で視認される指標は一定の明るさ(色調)ではない。
【0005】
本発明はこの様な点に鑑みなされたもので、暗色調を維持しながら表示部の視認性が良好な表示装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明は前記課題を解決するため、無色透明な基板に設けられた不透過性の地色層と、この地色層に抜き部を設けることによって形成された表示部とを有する表示板と、この表示板の前方側を被う無色透明な被い部材と、前記表示板の背後に配置される透過性の半透明部材と、この半透明部材の背後に配置され前記表示部を透過照明する光源とを備えたものである。
【0007】
また、前記表示部に対応した前記基板の裏面側に無色透明な拡散層を設けたものである。
【0008】
【発明の実施の形態】
本発明を、車両用の表示装置を実施形態として説明する。図1は回転計1と速度計2を備えた表示装置の正面図を示し、図2は回転計1の断面図(図1におけるA−A断面)であり、図3は回転計1に用いられる表示板の部分詳細断面図である。なお、図1に於いて速度計2の表示部は記載を省略する。
【0009】
表示装置は、硬質な回路基板3と、この回路基板3の裏面側に回路基板3と導通状態で装着され、回路基板3を貫通して前方に延びる回動軸4を有する表示器本体5と、回動軸4の先端側に固着される指針6と、この指針6の後方に配置され指針6の動作に対応する目盛,数字などの表示部7を有する表示板8と、この表示板8の背後に配置され例えば乳白色の光透過性の合成樹脂からなる半透明部材9と、回路基板3上に実装され指針6や表示板8を背後から照明する光源としての発光ダイオード10,10Aと、半透明部材9の背後であって半透明部材9と回路基板3との間に配置されたケース部材11と、回路基板3の裏面側を覆うカバー12と、表示板8の前方側に配置され表示板8の可視領域を定める開口部13を有する黒色の見返し部材14と、指針6や表示板8などの前方側を被う無色透明な被い部材15を備えている。
【0010】
指針6は、無色透明な合成樹脂からなる指示部16と、指針軸17と、指示部16の基部周囲(指針軸17の上方)を覆う遮光部材としての黒色の指針キャップ18を備えている。この指針6は指針軸17を表示器本体5の回動軸4の先端側に圧入することによって表示器本体5に固着されている。また、指示部16の裏面には赤色の箔(図示せず)がホットスタンプされている。指針6の指示部16は赤色で視認されるが、指針6照明用の発光ダイオード10が点灯した際も、指示部16の裏面に設けた赤色の箔に発光ダイオード10から導かれた光が反射して赤色で視認されるようになっている。
【0011】
表示板8は、図3に示す様に、無色透明な基板19の表面側に車両のエンジン回転数を現す目盛,数字などの表示部7となる箇所を除いて、地部20となる例えば黒色(不透過性)の地色層21を印刷する。すなわち、表示部7は地色層21に抜き部Xを設けることによって形成されるものである。また、基板19の表面側には地色層21や基板19面を保護するための無色透明な保護層22が設けてある。また、少なくとも表示部7に対応した基板19の裏面側には無色透明な拡散層23が印刷によって設けてある。
【0012】
ケース部材11は、遮光性のある白色の合成樹脂からなり、回動軸4周囲の指針6照明用の発光ダイオード10と表示板8を照明する発光ダイオード10Aとの間に立設した筒部24と、この筒部24の周囲に設けられ、発光ダイオード10Aからの光を周囲に反射する第1の反射部25と、発光ダイオード10A周辺から筒部24を取り巻くように表示板8の周囲側に向かって傾斜して形成された第2の反射部26と、半透明部材9あるいは表示板8が載置される前面部27や外周壁28などを有している。この様に、ケース部材11は半透明部材9および表示板9を保持するとともに、反射部材としての役目も果たしている。
【0013】
この様に構成された表示装置において、昼間時、発光ダイオード10Aが点灯していない状態では、表示板8の地部20は地色層21によって黒色で視認され、表示部7は抜き部Xを通して表示板8の背後に配置した半透明部材9が視認される。この際、半透明部材9の裏面側がケース部材11で覆われたような状態である、すなわち半透明部材9の裏面側が暗い状態であるために、抜き部Xを通して視認される表示部7の色は暗さを帯びた乳白色として視認される(表示板8に乳白色の印刷層を設けた場合は乳白色がくっきりと視認されるが、表示板8とは別部材であるため暗さを帯びた状態となる)。また、太陽光が直射した場合は抜き部Xを通して乳白色の表示部7として視認される。
【0014】
また、例えば白色で発光する発光ダイオード10Aが点灯した時は、発光ダイオード10Aから直接、あるいはケース部材11の第2の反射部26に反射して表示板8の裏面側に向かったそれぞれの光が半透明部材9を透過して表示部7を乳白色で視認させる。この際、発光ダイオード10Aからの光は半透明部材9および表示板8の裏面側に設けられている拡散層23で拡散されるため、表示部7が均一に透過照明する。さらに、半透明部材9にシボなどの光拡散処理や網点印刷などの調光用処理を施すことによって、より均一な照明が可能となる。なお、太陽光が直射するような環境下にあっては、表示部7を透過する光以上に外光が強いため、表示部7は抜き部Xを通して視認される半透明部材9の色(乳白色)として視認される。
【0015】
この様に、無色透明な基板19に設けられた不透過性の地色層21と、この地色層21に抜き部Xを設けることによって形成された表示部7とを有する表示板8と、この表示板8の前方側を被う無色透明な被い部材15と、表示板8の背後に配置される透過性の半透明部材9と、この半透明部材9の背後に配置され表示部7を透過照明する発光ダイオード10Aとを備えたことにより、暗色調を維持しながら、外光が直射するような場合であっても表示部7の視認性が良好な表示装置を得ることができる。
【0016】
また、表示板8の表示部7に対応した基板19の裏面側に無色透明な拡散層23を設けたことにより、発光ダイオード10Aからの光が拡散されるため、表示部7が均一に透過照明される。
【0017】
【発明の効果】
以上詳述したように、本発明によれば、暗色調を維持しながら表示部の視認性が良好な表示装置を得ることができる。
【図面の簡単な説明】
【図1】本発明の実施形態を示す表示装置の正面図。
【図2】同実施形態を示す表示装置の断面図(図1におけるA−A断面)。
【図3】同実施形態を示す表示板の部分詳細断面図。
【符号の説明】
7 表示部
8 表示板
9 半透明部材
10,10A 発光ダイオード(光源)
15 被い部材
19 基板
21 地色層
X 抜き部
23 拡散層
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display device mounted on various vehicles including, for example, automobiles and motorcycles, and in particular, a display in which a translucent member for coloring and visually recognizing a display unit behind a display plate provided with a transparent display unit is provided. It concerns the device.
[0002]
[Prior art]
Conventionally, in this type of display device, the display surface of the display device is usually set to a dark color in order to give a novelty and a high quality image, and the display unit is visually recognized when a light source arranged behind is turned on. For example, Patent Document 1 discloses such a configuration. The dial 5 of the indicating instrument (display device) in Patent Document 1 has a dark-colored ground color layer 7 for transmitting light on the front side of the light-transmitting substrate 6 and a scale on the back side of the light-transmitting substrate 6. A light-shielding layer 9 having openings 101 to 103 serving as indices such as 2 and 3 is provided. With this configuration, normally, the entire dial 5 is visually recognized in a dark color system, and when the illumination 8 is turned on, the illumination light passes through the openings 101 to 103 to the surface side and is visually recognized as an index. .
[0003]
[Patent Document 1]
JP-A-11-105581
[Problems to be solved by the invention]
However, when sunlight directly shines on the display device in an open car or the like, strong direct light is reflected by the dark ground color layer 7 so that the indicator is difficult to see even though the illumination lamp is turned on. Further, in the conventional example shown in FIG. 5 of Patent Document 1, the ground color portion and the indicator type portions are not the same dark color tone, but the index portion is somewhat visually recognized in a dark color system, thereby realizing the dark color tone. It is one of the techniques to do it. However, in this conventional example, the inside of the indicating instrument (behind the dial) is transmitted through the substrate from the opening serving as the indicator by the external light when the illumination lamp is not turned on. An index visually recognized in a transparent state is not constant brightness (color tone).
[0005]
The present invention has been made in view of such a point, and an object of the present invention is to provide a display device with good visibility of a display unit while maintaining a dark color tone.
[0006]
[Means for Solving the Problems]
The present invention, in order to solve the above problems, an impermeable ground color layer provided on a colorless and transparent substrate, and a display plate having a display portion formed by providing a punched portion in this ground color layer, A colorless and transparent covering member covering the front side of the display panel, a translucent translucent member disposed behind the display panel, and a transmissive illumination of the display unit disposed behind the translucent member. And a light source.
[0007]
Further, a colorless and transparent diffusion layer is provided on the back side of the substrate corresponding to the display section.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention will be described with a display device for a vehicle as an embodiment. FIG. 1 is a front view of a display device provided with a tachometer 1 and a speedometer 2, FIG. 2 is a cross-sectional view of the tachometer 1 (A-A cross section in FIG. 1), and FIG. FIG. 4 is a partial detailed cross-sectional view of a display panel provided. In FIG. 1, the display of the speedometer 2 is omitted.
[0009]
The display device includes a rigid circuit board 3, a display body 5 having a rotating shaft 4 mounted on the back side of the circuit board 3 in a conductive state with the circuit board 3 and extending forward through the circuit board 3. A pointer 6 fixed to the distal end side of the rotating shaft 4, a display panel 8 disposed behind the pointer 6, and having a display 7 for indicating scales, numbers, etc. corresponding to the operation of the pointer 6, and a display panel 8 A translucent member 9 made of, for example, a milky white light-transmitting synthetic resin, and light-emitting diodes 10, 10A mounted on the circuit board 3 and illuminating the hands 6 and the display panel 8 from behind; A case member 11 disposed behind the translucent member 9 and between the translucent member 9 and the circuit board 3, a cover 12 covering the back side of the circuit board 3, and a front side of the display panel 8 Black view with an opening 13 that defines the visible area of the display panel 8 And to member 14, and a colorless transparent covered member 15 covering the front side, such as the pointer 6 and the display panel 8.
[0010]
The pointer 6 includes a pointer 16 made of a colorless and transparent synthetic resin, a pointer shaft 17, and a black pointer cap 18 as a light shielding member that covers the base of the pointer 16 (above the pointer shaft 17). The pointer 6 is fixed to the display main body 5 by press-fitting the pointer shaft 17 into the distal end side of the rotating shaft 4 of the display main body 5. A red foil (not shown) is hot-stamped on the back surface of the indicator 16. Although the indicator 16 of the pointer 6 is visually recognized in red, even when the light emitting diode 10 for illuminating the indicator 6 is turned on, light guided from the light emitting diode 10 is reflected on the red foil provided on the back surface of the indicator 6. It is visible in red.
[0011]
As shown in FIG. 3, the display plate 8 is, for example, a black portion which becomes the ground portion 20 except for a portion which becomes the display portion 7 such as a scale and a number indicating the engine speed of the vehicle on the front side of the colorless and transparent substrate 19. The (opaque) ground color layer 21 is printed. That is, the display unit 7 is formed by providing the blank portion X in the ground color layer 21. On the front surface side of the substrate 19, a ground color layer 21 and a colorless and transparent protective layer 22 for protecting the surface of the substrate 19 are provided. A colorless and transparent diffusion layer 23 is provided by printing on at least the back surface of the substrate 19 corresponding to the display unit 7.
[0012]
The case member 11 is made of a light-shielding white synthetic resin, and has a cylindrical portion 24 erected between the light-emitting diode 10 for illumination of the pointer 6 and the light-emitting diode 10A for illuminating the display panel 8 around the rotary shaft 4. A first reflecting portion 25 provided around the cylindrical portion 24 and reflecting light from the light emitting diode 10A to the surroundings; and a first reflecting portion 25 around the display plate 8 so as to surround the cylindrical portion 24 from around the light emitting diode 10A. It has a second reflecting portion 26 inclined toward the front, a front portion 27 on which the translucent member 9 or the display panel 8 is placed, an outer peripheral wall 28, and the like. As described above, the case member 11 holds the translucent member 9 and the display panel 9 and also serves as a reflection member.
[0013]
In the display device thus configured, in the daytime, when the light emitting diode 10A is not lit, the ground portion 20 of the display panel 8 is visually recognized in black by the ground color layer 21, and the display portion 7 passes through the cutout portion X. The translucent member 9 disposed behind the display plate 8 is visible. At this time, since the back surface of the translucent member 9 is covered with the case member 11, that is, the back surface of the translucent member 9 is dark, the color of the display unit 7 visually recognized through the cutout portion X. Is visually recognized as a dark milky white (when the display panel 8 is provided with a milky white printed layer, the milky white is clearly visible, but is dark because it is a separate member from the display panel 8). Becomes). Further, when sunlight is directly irradiated, the sunlight is visually recognized as the milky white display unit 7 through the cutout portion X.
[0014]
Further, for example, when the light emitting diode 10A that emits white light is turned on, each light directed from the light emitting diode 10A or reflected on the second reflecting portion 26 of the case member 11 toward the back surface side of the display panel 8 is emitted. The display unit 7 is visually perceived as milky white through the translucent member 9. At this time, since the light from the light emitting diode 10A is diffused by the translucent member 9 and the diffusion layer 23 provided on the back surface side of the display panel 8, the display unit 7 is uniformly transmitted and illuminated. Further, by performing a light diffusion process such as graining or a light control process such as halftone dot printing on the translucent member 9, more uniform illumination can be achieved. In an environment where sunlight directly shines, the external light is stronger than the light transmitted through the display unit 7. ).
[0015]
As described above, the display plate 8 including the impermeable ground color layer 21 provided on the colorless and transparent substrate 19 and the display unit 7 formed by providing the cutout portion X in the ground color layer 21, A colorless and transparent covering member 15 covering the front side of the display panel 8, a translucent translucent member 9 disposed behind the display panel 8, and a display section 7 disposed behind the translucent member 9. And a light-emitting diode 10A that transmits and illuminates the display device, it is possible to obtain a display device in which the visibility of the display unit 7 is good even when external light is directly incident while maintaining a dark color tone.
[0016]
In addition, since the colorless and transparent diffusion layer 23 is provided on the back surface of the substrate 19 corresponding to the display unit 7 of the display plate 8, light from the light emitting diode 10A is diffused, so that the display unit 7 can be uniformly transmitted and illuminated. Is done.
[0017]
【The invention's effect】
As described in detail above, according to the present invention, it is possible to obtain a display device in which the visibility of the display unit is good while maintaining the dark color tone.
[Brief description of the drawings]
FIG. 1 is a front view of a display device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the display device according to the embodiment (a cross-section taken along line AA in FIG. 1).
FIG. 3 is a partial detailed cross-sectional view of the display panel showing the embodiment.
[Explanation of symbols]
7 display part 8 display board 9 translucent member 10, 10A light emitting diode (light source)
15 Covering member 19 Substrate 21 Ground color layer X Cutout 23 Diffusion layer

Claims (2)

無色透明な基板に設けられた不透過性の地色層と、この地色層に抜き部を設けることによって形成された表示部とを有する表示板と、この表示板の前方側を被う無色透明な被い部材と、前記表示板の背後に配置される透過性の半透明部材と、この半透明部材の背後に配置され前記表示部を透過照明する光源とを備えることを特徴とする表示装置。A display plate having an impermeable ground color layer provided on a colorless and transparent substrate, and a display portion formed by providing a cutout in the ground color layer, and a colorless covering the front side of the display plate A display, comprising: a transparent cover member, a translucent translucent member disposed behind the display panel, and a light source disposed behind the translucent member and configured to transmit and illuminate the display unit. apparatus. 前記表示部に対応した前記基板の裏面側に無色透明な拡散層を設けたことを特徴とする請求項1に記載の表示装置。The display device according to claim 1, wherein a colorless and transparent diffusion layer is provided on a back surface side of the substrate corresponding to the display unit.
JP2003095414A 2003-03-31 2003-03-31 Display device Pending JP2004301687A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006208036A (en) * 2005-01-25 2006-08-10 Nippon Seiki Co Ltd Meter for vehicle
JP2009019930A (en) * 2007-07-10 2009-01-29 Denso Corp Vehicle instrument
WO2009128516A1 (en) * 2008-04-17 2009-10-22 株式会社フジクラ Display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006208036A (en) * 2005-01-25 2006-08-10 Nippon Seiki Co Ltd Meter for vehicle
JP2009019930A (en) * 2007-07-10 2009-01-29 Denso Corp Vehicle instrument
WO2009128516A1 (en) * 2008-04-17 2009-10-22 株式会社フジクラ Display device
JPWO2009128516A1 (en) * 2008-04-17 2011-08-04 株式会社フジクラ Display device

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