JPS6131346Y2 - - Google Patents
Info
- Publication number
- JPS6131346Y2 JPS6131346Y2 JP1978026782U JP2678278U JPS6131346Y2 JP S6131346 Y2 JPS6131346 Y2 JP S6131346Y2 JP 1978026782 U JP1978026782 U JP 1978026782U JP 2678278 U JP2678278 U JP 2678278U JP S6131346 Y2 JPS6131346 Y2 JP S6131346Y2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- polarizing plate
- display device
- antireflection film
- 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
- 239000004973 liquid crystal related substance Substances 0.000 claims description 19
- 239000004020 conductor Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 230000005684 electric field Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 210000002858 crystal cell Anatomy 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【考案の詳細な説明】
本考案は偏光板の表面に導電性物質からなる反
射防止膜を形成した液晶表示装置に関するもので
ある。[Detailed Description of the Invention] The present invention relates to a liquid crystal display device in which an antireflection film made of a conductive material is formed on the surface of a polarizing plate.
従来、液晶表示装置において強い表面反射光が
目に入ると表示が非常に見づらかつた。 Conventionally, in liquid crystal display devices, when strong surface reflected light enters the eye, the display is extremely difficult to see.
一方特に電界効果型液晶表示装置において、低
電圧駆動用の液晶セルが開発の動向にあり、液晶
分子は従来に比して低電界にて配向が変化し、し
たがつて外部電界の影響によつて液晶分子の配列
が乱される可能性が増加してきた。即ち外部電界
の影響で電極パターン部分または液晶充填部全域
が表示状態の現象を呈する等実用上問題があつ
た。 On the other hand, especially in field-effect liquid crystal display devices, there is a trend in the development of liquid crystal cells for low-voltage driving, and the orientation of liquid crystal molecules changes in a lower electric field than in the past, so it is difficult to change the orientation of liquid crystal molecules due to the influence of an external electric field. As a result, the possibility that the arrangement of liquid crystal molecules is disturbed has increased. That is, there were practical problems such as the electrode pattern portion or the entire liquid crystal filled portion exhibiting a display state phenomenon due to the influence of an external electric field.
本考案は上記従来欠点を解消するものであり、
偏光板の表面に反射防止膜をコーテイングするこ
とによつて外部光の表面反射を防ぐとともに上記
反射防止膜を導電性物質にて形成することによつ
て液晶セルの静電シールドを行うことを目的とす
る。 The present invention solves the above-mentioned conventional drawbacks,
The purpose is to prevent surface reflection of external light by coating the surface of a polarizing plate with an anti-reflection film, and to perform electrostatic shielding of a liquid crystal cell by forming the above-mentioned anti-reflection film with a conductive material. shall be.
以下本考案の一実施例を図面を用いて詳細に説
明する。 An embodiment of the present invention will be described in detail below with reference to the drawings.
図面は本考案に係わる一実施例の液晶表示装置
の側面図を示す。図において示されるように、液
晶組成物１が２枚のガラス基板２，２′の間に介
在される。そして上記ガラス基板２，２′の外側
には偏光板３，３′が配役され下部偏光板３′の下
には反射板４が取り付けられる。また上記偏光板
３の上面に導電性物質からなる反射防止膜５が蒸
着、浸漬、スパツタリング法等によつてコーテイ
ングされ表面反射を防いでいる。ここで入射光の
波長をλ、反射防止膜の厚さをｄ、屈折率をｎ、
偏光板の屈折率をn′とすれば単層の反射防止膜で
は空気中で
ｄ＝（λ／４）／ｎ
ｎ＝√′
の条件が満足されれば波長λの光を防止すること
ができる。一般にはｎ≒１であるためｄ≒λ／４
の関係が成り立つ。また偏光板の材質は通常トリ
アセチルカーボネートのように熱に弱いものであ
るが低温スパツタリング等の方法を用いればコー
テイングが可能である。また導電性の物質にて上
記反射防止膜を形成する際、単層の場合は屈折率
が小さい物質が望まれるが屈折率の大きい1nO2
膜を用いた場合でもこれを多層とすれば上記反射
防止膜を形成することは可能である。そしてこの
導電性の反射防止膜をアースすれば静電遮蔽する
ことができる。 The drawing shows a side view of a liquid crystal display device according to an embodiment of the present invention. As shown in the figure, a liquid crystal composition 1 is interposed between two glass substrates 2, 2'. Polarizing plates 3, 3' are arranged outside the glass substrates 2, 2', and a reflecting plate 4 is attached below the lower polarizing plate 3'. Further, an antireflection film 5 made of a conductive material is coated on the upper surface of the polarizing plate 3 by vapor deposition, dipping, sputtering, or the like to prevent surface reflection. Here, the wavelength of the incident light is λ, the thickness of the antireflection film is d, the refractive index is n,
If the refractive index of the polarizing plate is n', then a single-layer antireflection film can prevent light with wavelength λ in air if the following conditions are satisfied: d=(λ/4)/n n=√' can. In general, n≒1, so d≒λ/4
The relationship holds true. Furthermore, although the material of the polarizing plate is usually one that is sensitive to heat, such as triacetyl carbonate, it can be coated using a method such as low-temperature sputtering. Furthermore, when forming the above antireflection film using a conductive substance, a substance with a low refractive index is desired in the case of a single layer, but 1nO 2 with a high refractive index is preferable.
Even when a film is used, it is possible to form the above-mentioned antireflection film by making it a multilayer film. If this conductive anti-reflection film is grounded, static electricity can be shielded.
以上説明した本考案によれば液晶表示装置の偏
光板の照明光の入射側表面に透明な導電性物質か
らなる反射防止膜を形成し、該反射防止膜の膜厚
を、照明光の波長をλ、上記偏光板の屈折率を
n′とした時略λ／４√ｎ′に設定するとともに上記反
射
防止膜をアースしたので、液晶表示装置の表面反
射を防いで表示内容の視認性を向上せしめ、更に
外部電界に対する静電シールドを達成して外部電
界の影響によつて液晶分子の配列が乱されること
を防止することができるものである。 According to the present invention described above, an antireflection film made of a transparent conductive material is formed on the illumination light incident side surface of a polarizing plate of a liquid crystal display device, and the thickness of the antireflection film is adjusted by adjusting the wavelength of the illumination light. λ, the refractive index of the above polarizing plate
Since n' is set to approximately λ/4√n' and the anti-reflection film is grounded, it prevents reflections from the surface of the liquid crystal display and improves the visibility of displayed contents, and also provides an electrostatic shield against external electric fields. By achieving this, it is possible to prevent the arrangement of liquid crystal molecules from being disturbed by the influence of an external electric field.
図面は本考案に係わる液晶表示装置の側面図を
示す。
図中、１：液晶表示装置、２，２′：ガラス基
板、３，３′：偏光板、４：反射板、５：反射防
止膜。
The drawing shows a side view of a liquid crystal display device according to the present invention. In the figure, 1: liquid crystal display device, 2, 2': glass substrate, 3, 3': polarizing plate, 4: reflective plate, 5: antireflection film.
Claims (1)
板の両外側に２枚の偏光板が配置されてなる液晶
表示装置において、上記偏光板の照明光の入射側
表面に透明な導電性物質からなる反射防止膜を形
成し、該反射防止膜の膜厚を、照明光の波長を
λ、上記偏光板の屈折率をn′とした時略λ／４√ｎ′
に 設定するとともに、上記反射防止膜をアースした
ことを特徴とする液晶表示装置。[Claims for Utility Model Registration] In a liquid crystal display device in which a liquid crystal composition is interposed between two substrates, and two polarizing plates are disposed on both outer sides of the substrates, the incident of illumination light on the polarizing plates An anti-reflection film made of a transparent conductive material is formed on the side surface, and the thickness of the anti-reflection film is approximately λ/4√, where the wavelength of the illumination light is λ and the refractive index of the polarizing plate is n′. n′
A liquid crystal display device characterized in that the antireflection film is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978026782U JPS6131346Y2 (en) | 1978-02-28 | 1978-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978026782U JPS6131346Y2 (en) | 1978-02-28 | 1978-02-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54129981U JPS54129981U (en) | 1979-09-10 |
| JPS6131346Y2 true JPS6131346Y2 (en) | 1986-09-11 |
Family
ID=28869687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978026782U Expired JPS6131346Y2 (en) | 1978-02-28 | 1978-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6131346Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613822B2 (en) * | 1976-11-02 | 1981-03-31 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618410Y2 (en) * | 1979-07-10 | 1986-03-15 |
-
1978
- 1978-02-28 JP JP1978026782U patent/JPS6131346Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613822B2 (en) * | 1976-11-02 | 1981-03-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54129981U (en) | 1979-09-10 |
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