JPH0443912Y2 - - Google Patents
Info
- Publication number
- JPH0443912Y2 JPH0443912Y2 JP1967788U JP1967788U JPH0443912Y2 JP H0443912 Y2 JPH0443912 Y2 JP H0443912Y2 JP 1967788 U JP1967788 U JP 1967788U JP 1967788 U JP1967788 U JP 1967788U JP H0443912 Y2 JPH0443912 Y2 JP H0443912Y2
- Authority
- JP
- Japan
- Prior art keywords
- display
- front cover
- display device
- plate
- reflected
- 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.)
- Expired
Links
- 239000010409 thin film Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims 1
- 239000011521 glass Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000011247 coating layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Landscapes
- Instrument Panels (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、例えば自動車に配備されるヘツドア
ツプ式表示装置として使用される反射型表示装置
に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reflective display device used as a head-up display device installed in, for example, an automobile.
従来のこの種の反射型表示装置としては、例え
ば第５図に示す如きものがある。これは、蛍光表
示器、EL表示器等の自発光素子を用いた表示器
１を内装するハウジング２に、開口部３を設ける
と共に、このハウジング２内には、表示器１から
の表示像を前記開口部３を経て運転者等へ視認せ
しめるための反射板４が内装されており、さらに
その開口部には、透光性の前面カバー５が被着さ
れている。この前面カバー５の構造は第６図に示
すように、円偏光板５ｂの表裏両面に、夫々の透
明ガラス板５ａを重合して一体形成したものであ
る。
As a conventional reflective display device of this type, there is one shown in FIG. 5, for example. In this case, an opening 3 is provided in a housing 2 that houses a display 1 using a self-luminous element such as a fluorescent display or an EL display, and a display image from the display 1 is provided inside the housing 2. A reflective plate 4 is installed inside the vehicle so that it can be seen by the driver through the opening 3, and a translucent front cover 5 is attached to the opening. As shown in FIG. 6, the front cover 5 has a structure in which transparent glass plates 5a are superposed and integrally formed on both the front and back surfaces of a circularly polarizing plate 5b.
ところが、このような従来の反射型表示装置、
即ち開口部３に設けられている前面カバー５にあ
つては、表示器１による表示像の一部が、前面カ
バー５における裏面（透明ガラス板５ａ）に反射
し、さらにこの反射光が反射板４に反射ａされ
て、表示器１から、直接に反射板４を反射して得
られる表示像ｂとの重なりによつて二重像となつ
てしまうこと、また外来光ｃの一部がその前面カ
バー５の表面ガラス板５ａの反射されること等
で、表示器１からの表示像が見づらくなるという
不具合があつた。
However, such conventional reflective display devices,
That is, in the case of the front cover 5 provided in the opening 3, a part of the image displayed by the display 1 is reflected on the back surface (transparent glass plate 5a) of the front cover 5, and this reflected light is further reflected on the reflection plate. 4, a part of the external light c is overlapped with the display image b obtained by directly reflecting the reflection plate 4 from the display 1, resulting in a double image. There was a problem in that the displayed image from the display 1 became difficult to see due to reflection from the front glass plate 5a of the front cover 5.
本考案は、かかる従来の不具合に着目してなさ
れたもので、開口部を有するハウジング内に、反
射板及び表示器を対向配置せしめ、該表示器の表
示内容を前記反射板に反射せしめて、その反射表
示像を前方から視認しうるようにしてなる反射型
表示装置において、前記ハウジングの開口部に、
２枚の透光板で円偏光板を挾持しかつその表側透
光板の表面に無反射コーテイングを施した前面カ
バーを配設すると共に、前記表示器の表示面に該
表示器からの表示像が前記前面カバーに反射され
ることを防止するルーバ型フイルタを近設せしめ
て、表示器からの表示像の前面カバーによる反射
と、外来光の反射を有効に防止して鮮明なる表示
像を目視し得る反射型表示装置を提供することに
ある。
The present invention has been developed by focusing on such conventional problems, and includes a reflecting plate and a display disposed facing each other in a housing having an opening, and the display contents of the display being reflected on the reflecting plate. In a reflective display device whose reflective display image can be viewed from the front, an opening of the housing includes:
A front cover is provided in which a circularly polarizing plate is sandwiched between two transparent plates and a non-reflective coating is applied to the surface of the front transparent plate, and a display image from the display is displayed on the display surface of the display unit. A louver type filter is installed nearby to prevent light from being reflected on the front cover, effectively preventing reflection of the display image from the display unit by the front cover and reflection of external light, so that a clear display image can be viewed visually. The object of the present invention is to provide a reflective display device that can be used as a reflective display device.
以下に本考案を、第１図乃至第４図に示す実施
例に基いて詳細に説明するが、本実施例では表示
器の表示面にルーバ型フイルタを増設すること、
及び前面カバーの構造が従来例のものと異り、そ
の他の構造は従来例と同じであるので、その同一
部分は従来例で引用した符号を付してその同一構
造部の説明は省略する。
The present invention will be explained in detail below based on the embodiment shown in FIGS. 1 to 4. In this embodiment, a louver type filter is added to the display surface of the display,
The structure of the front cover is different from that of the conventional example, and the other structures are the same as those of the conventional example. Therefore, the same parts are given the same reference numerals as in the conventional example, and a description of the same structural parts will be omitted.
即ち本実施における前面カバー６の構成は第２
図に示すように、円偏光板６ｂの表裏両面に夫々
の透明ガラス板６ａを重ね合せ、さらにその前面
カバー６の表側に位置される透明ガラス板６ａの
表面には、無反射コーテイング層６ｃを施したも
のである。 That is, the configuration of the front cover 6 in this embodiment is the second one.
As shown in the figure, transparent glass plates 6a are stacked on both the front and back surfaces of a circularly polarizing plate 6b, and a non-reflective coating layer 6c is further applied to the surface of the transparent glass plate 6a located on the front side of the front cover 6. It was given.
この無反射コーテイング層６ｃの構造についてさ
らに具体的に説明すると、この無反射コーテイン
グ層６ｃは、第３図に示す如く、その透明ガラス
板６ａの表面より、光屈折率が異る２種類の反射
防止薄膜６c′と６c″を交互多層に（本実施例では
薄膜６c′と６c″ともに３層で合計で６層）に形成
することにある。この反射防止薄膜６c′と６c″と
の材質選定は次の式を満足する物質であればよ
い。To explain the structure of the non-reflective coating layer 6c in more detail, as shown in FIG. The purpose is to form the preventive thin films 6c' and 6c'' in alternating multilayers (in this embodiment, the thin films 6c' and 6c'' are both three layers, making a total of six layers). The material for the antireflection thin films 6c' and 6c'' may be selected as long as it satisfies the following formula.
即ち、一方の薄膜６c′の屈折率をn1とし、他方
の薄膜６c″の屈折率をn2としたとき、屈折率n1の
物質と屈折率n2の物質をそれぞれ入射光の波長λ
の1/4の厚さの層にして屈折率ng（約1.49）のガラ
ス上にコートしたときの表面反射率Ｒは、
Ｒ＝（n1 2ng−n2 2／n1 2ng＋n2 2）2
であるため、Ｒ＝０となるにはn1 2ng−n2 2＝０す
なわちn2／n1＝√となるような物質を選定す
る。 That is, when the refractive index of one thin film 6c' is n 1 and the refractive index of the other thin film 6c'' is n 2 , the material with the refractive index n 1 and the material with the refractive index n 2 are each given the wavelength λ of the incident light.
When coated on glass with a refractive index of ng (approximately 1.49), the surface reflectance R is R = (n 1 2 ng - n 2 2 / n 1 2 ng + n 2 2 ) 2 , so in order for R=0, select a substance such that n 1 2 ng−n 2 2 =0, that is, n 2 /n 1 =√.
上記式を満足し得る物質は、例えば薄膜６c′の
物質が酸化ジルコニウム（ZrO2）であるとき、
薄膜６c″の物質は弗化マグネシウム（MgF2）で
あることが望ましい。また薄膜６c′の物質が酸化
チタン（TiO2）であるとき、薄膜６c″の物質は
２酸化ケイ素（SiO2）であることが望ましい。 For example, when the material of the thin film 6c' is zirconium oxide (ZrO 2 ), the material that can satisfy the above formula is:
The material of the thin film 6c'' is preferably magnesium fluoride (MgF 2 ). When the material of the thin film 6c' is titanium oxide (TiO 2 ), the material of the thin film 6c'' is preferably silicon dioxide (SiO 2 ). It is desirable that there be.
７は表示器１の表示面近傍に取付けてなるルー
バ型フイルタであつて、このルーバ型フイルタ７
の詳細構造は、第４図に示す如く、透光孔７ａと
遮光壁７ｂとが交互に形成されて、そのルーバ型
フイルタ７の表面に対して直角に近い光ｄは透す
が、その表面に対して平行に近い光ｅは遮光する
ことができるよになつている。従つて光ｅは遮光
されるために、表示器１からの前面カバー方向へ
の表示像が遮断され、前面カバー６内面で表示像
が反射されることがない。即ち第６図における反
射光ａが生じることがなくなる。またこのルーバ
型フイルタ７の配置については、表示器からの表
示像が有効に反射板４方向へ照射されるようにす
るため、そのルーバ型フイルタ７の面と、前面カ
バー６とがなす角θが鈍角となるように配置して
ある。 Reference numeral 7 denotes a louver type filter attached near the display surface of the display unit 1, and this louver type filter 7
As shown in FIG. 4, the detailed structure is that light transmitting holes 7a and light shielding walls 7b are formed alternately, and the light d that is nearly perpendicular to the surface of the louver type filter 7 passes through, but the It is possible to block light e that is nearly parallel to the light e. Therefore, since the light e is blocked, the displayed image from the display 1 toward the front cover is blocked, and the displayed image is not reflected on the inner surface of the front cover 6. That is, the reflected light a shown in FIG. 6 is no longer generated. In addition, regarding the arrangement of this louver type filter 7, in order to effectively irradiate the display image from the display device in the direction of the reflection plate 4, the angle θ formed between the surface of the louver type filter 7 and the front cover 6 is is arranged so that it forms an obtuse angle.
このように本考案にあつては、表示装置の表示
開口部に被着される前面カバーとして屈折率が異
なる２種類の薄膜６c′と６c″を交互に複数層成し
てなる。無反射コーテイング層６ｃを、円偏光板
の両面に重合せしめた表側のガラス板５ａの表面
に施したものであるから、この無反射コーテイン
グ層６ｃの作用によつて、その前面カバー６に当
つた外来光は、その前面カバー６を透過してハウ
ジング２内に吸収される。また表示器１の表示面
に面して、表示器１からの表示像を、反射板４へ
導光するためのルーバ型フイルタ７を具備せしめ
ていることから、表示器１からの表示像の一部が
前面カバー６の内側面で反射されることもなく、
従つて、その表示装置の観者は、表示器１から発
して反射板４に反射された表示像のみが目視さ
れ、これにより鮮明な表示像が目視できる効果が
ある。また本考案の前面カバー６は平板であつて
も無反射性であることから、従来の曲面カバー使
用の表示装置に比して設計の自由度が広がり、製
品コストの経済的効果もある。
In this way, in the present invention, two types of thin films 6c' and 6c'' having different refractive indexes are alternately formed in multiple layers as a front cover to be applied to the display opening of the display device. Since the layer 6c is applied to the surface of the front glass plate 5a superimposed on both sides of the circularly polarizing plate, the external light that hits the front cover 6 is reduced by the action of the anti-reflection coating layer 6c. , transmitted through the front cover 6 and absorbed into the housing 2.Furthermore, a louver type filter is provided facing the display surface of the display 1 to guide the displayed image from the display 1 to the reflection plate 4. 7, a part of the displayed image from the display 1 is not reflected on the inner surface of the front cover 6,
Therefore, the viewer of the display device can see only the displayed image emitted from the display 1 and reflected by the reflecting plate 4, which has the effect of allowing the viewer to see a clear displayed image. Furthermore, since the front cover 6 of the present invention is non-reflective even though it is a flat plate, the degree of freedom in design is increased compared to display devices using conventional curved covers, and there is also an economical effect on product costs.
第１図は、本考案よりなる反射型表示装置の実
施例を示した説明図、第２図は前面カバーの断面
説明図、第３図は前面カバーの詳細断面図、第４
図はルーバ型フイルタの詳細断面図、第５図は従
来例の説明図、第６図は従来の前面カバーのみの
断面説明図である。
６……前面カバー、６ａ……透明ガラス、６ｂ
……円偏光板、６ｃ……無反射コーテイング層、
６c′，６c″……反射防止薄膜、７……ルーバ型フ
イルタ、７ａ……透光孔、７ｂ……遮光壁。
FIG. 1 is an explanatory diagram showing an embodiment of the reflective display device according to the present invention, FIG. 2 is a cross-sectional explanatory diagram of the front cover, FIG. 3 is a detailed cross-sectional diagram of the front cover, and FIG.
The figure is a detailed cross-sectional view of a louver type filter, FIG. 5 is an explanatory view of a conventional example, and FIG. 6 is a cross-sectional view of only a conventional front cover. 6...Front cover, 6a...Transparent glass, 6b
...Circularly polarizing plate, 6c...Non-reflection coating layer,
6c', 6c''...Anti-reflection thin film, 7...Louver type filter, 7a...Transparent hole, 7b...Shading wall.
Claims (1)
及び表示器１を対向配置せしめ、該表示器１の表
示内容を前記反射板４に反射せしめて、その反射
表示像を前方から視認しうるようにしてなる反射
型表示装置において、前記ハウジング２の開口部
３に、２枚の透光板６ａで円偏光板６ｂを挾持し
てなるかつその表側となる透光板６ａの表面に、
屈折率が異る２種類の光学的薄膜６c′と６c″を交
互多層に形成してなる前面カバー６を配設すると
共に、該前面カバーとなす角度θが鈍角をなるよ
うにルーバ型フイルタ７を前記表示器１の表示面
側に配設したことを特徴とする反射型表示装置。 A reflector 4 is disposed within the housing 2 having the opening 3.
and a reflective display device in which display devices 1 are disposed facing each other, the display content of the display device 1 is reflected by the reflector plate 4, and the reflected display image can be visually recognized from the front. A circularly polarizing plate 6b is sandwiched between two transparent plates 6a in the opening 3, and on the front surface of the transparent plate 6a,
A front cover 6 formed by alternately forming two types of optical thin films 6c' and 6c'' with different refractive indices in multilayers is provided, and a louver-type filter 7 is provided so that the angle θ formed with the front cover is an obtuse angle. A reflective display device characterized in that: is arranged on the display surface side of the display device 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1967788U JPH0443912Y2 (en) | 1988-02-17 | 1988-02-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1967788U JPH0443912Y2 (en) | 1988-02-17 | 1988-02-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01125486U JPH01125486U (en) | 1989-08-28 |
| JPH0443912Y2 true JPH0443912Y2 (en) | 1992-10-16 |
Family
ID=31235398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1967788U Expired JPH0443912Y2 (en) | 1988-02-17 | 1988-02-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443912Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007052671B4 (en) | 2007-11-05 | 2012-11-08 | Airbus Operations Gmbh | Display module for displaying passenger-specific display information |
| JP6131766B2 (en) | 2013-08-06 | 2017-05-24 | 株式会社デンソー | Head-up display device for vehicle |
| JP6320645B2 (en) * | 2016-05-16 | 2018-05-09 | 株式会社ポラテクノ | Polarizing member and head-up display device including the same |
-
1988
- 1988-02-17 JP JP1967788U patent/JPH0443912Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01125486U (en) | 1989-08-28 |
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