JP2001222004A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JP2001222004A JP2001222004A JP2000033942A JP2000033942A JP2001222004A JP 2001222004 A JP2001222004 A JP 2001222004A JP 2000033942 A JP2000033942 A JP 2000033942A JP 2000033942 A JP2000033942 A JP 2000033942A JP 2001222004 A JP2001222004 A JP 2001222004A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- thin film
- polarizing
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶表示装置に係
わり、特に、使用者だけが画面の表示を視認できるよう
にした液晶表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device in which only a user can visually recognize a display on a screen.
【０００２】[0002]
【従来の技術】一般に透過型と反射型のいずれにおいて
も液晶セルと偏光板とを組み合わせて使用される液晶表
示装置は、液晶セルの光学的偏光性を液晶分子の配列を
制御することによって変化させて、明あるいは暗表示、
または中間階調を表示するものである。2. Description of the Related Art In general, a liquid crystal display device in which a liquid crystal cell and a polarizing plate are used in combination in both a transmission type and a reflection type changes the optical polarization of the liquid crystal cell by controlling the arrangement of liquid crystal molecules. Let it be light or dark,
Alternatively, an intermediate gradation is displayed.
【０００３】液晶表示装置は通常、ある程度の視野角の
制限はあるものの、視野角内にあるすべての観測者の目
で表示が視認できる。つまり、一度に複数の人が一つの
液晶表示装置の表示を同時に見ることができる。どの方
向からでも表示が見えるように改良された最近の広視野
角化対策技術によりその傾向は顕著となりつつある。[0003] In general, the liquid crystal display device has a limited viewing angle, but the display can be visually recognized by all observers within the viewing angle. That is, a plurality of persons can simultaneously view the display of one liquid crystal display device at a time. This tendency is becoming more prominent due to the recent technology for widening the viewing angle that has been improved so that the display can be viewed from any direction.
【０００４】これは使用者が見る位置を多少変えても常
に正しく表示を視認できるという点では大変好都合であ
るが、一方では自分が見ている表示中の内容を他人にも
見られてしまうというセキュリティやプライバシーの問
題もある。例えば、会社員が携帯情報端末の表示を電車
内のような他人がすぐ近くにいる社外で見るような場合
に、それが社外秘の重要な緊急メールなどのときには、
周囲の人の目が気になってメールを開き、見ることが困
難な場合がある。また、機密上問題のない表示内容であ
っても、他人には見られたくない場合もある。[0004] This is very convenient in that the display can always be viewed correctly even if the user changes the viewing position slightly, but on the other hand, the contents being displayed by the user can be viewed by others. There are also security and privacy issues. For example, if an office worker looks at the display of a personal digital assistant outside the company, such as on a train, where others are nearby, and this is an important confidential emergency email,
Opening an e-mail when people around you are worried about it can be difficult to read. In addition, even if the displayed content has no confidentiality problem, it may not be desired to be seen by others.
【０００５】[0005]
【発明が解決しようとする課題】ＳＴＮ型液晶ディスプ
レイは視角特性が比較的よくないが、ある程度の視角範
囲にいる人には表示は見えてしまう。The STN type liquid crystal display has relatively poor viewing angle characteristics, but the display is visible to a person who is in a certain viewing angle range.
【０００６】ヘッドマウントディスプレイは、ゴーグル
型の表示装置であり、使用者がその頭部に装着すること
で内部の小型の液晶ディスプレイで使用者だけが表示を
見ることができ、他人が見ることはできない。しかし、
現在この種の装置はかさばって見た目が悪く、また重量
も比較的重いので、使用感が今一つ快適でなく、装着中
は周囲がまったく見えなくなってしまうという問題もあ
る。A head-mounted display is a goggle-type display device. When the user wears the head-mounted display on his / her head, only the user can view the display on a small liquid crystal display inside, and others cannot see the display. Can not. But,
At present, this type of device is bulky and unsightly and relatively heavy, so that it is not comfortable to use and its surroundings are completely invisible during wearing.
【０００７】眼鏡型ディスプレイの提案もなされている
が、ディスプレイ自体を小型化するためのコストアッ
プ、解像度の低下、高価な光学系、焦点距離が短くて使
用者が非常に疲れやすいといった諸問題がある。[0007] Although spectacle-type displays have been proposed, there are various problems such as an increase in cost for reducing the size of the display itself, a decrease in resolution, an expensive optical system, and a short focal length, which makes the user very tired. is there.
【０００８】本発明の目的は、使用者以外の第三者が近
くで覗き込んでも表示内容を視認することをできなく
し、使用者だけが表示を視認することができて、セキュ
リティやプライバシーを保つことのできる液晶表示装置
を提供することである。[0008] An object of the present invention is to prevent a third party other than the user from seeing the display contents even when peeping in the vicinity, so that only the user can view the display and maintain security and privacy. It is to provide a liquid crystal display device capable of performing the above.
【０００９】[0009]
【課題を解決するための手段】液晶表示装置は、一般に
液晶分子の配列を制御することによって液晶セルの光学
的偏光状態を変化させて、明あるいは暗表示、または中
間階調を表示するものである。従って，そのような液晶
表示装置は透過型と反射型のいずれにおいても液晶セル
と偏光性薄膜すなわち偏光板とを組み合わせて使用する
ことにより表示を視認することができる。従って、偏光
性薄膜を使用者のみが使えるようにすることで、第三者
が表示を見ることをできなくすることができる。In general, a liquid crystal display device displays a bright or dark display or an intermediate gradation by changing the optical polarization state of a liquid crystal cell by controlling the arrangement of liquid crystal molecules. is there. Therefore, in such a liquid crystal display device, a display can be visually recognized by using a liquid crystal cell in combination with a polarizing thin film, that is, a polarizing plate, in both the transmission type and the reflection type. Therefore, by making the polarizing thin film usable only by the user, it is possible to prevent a third party from seeing the display.
【００１０】本発明の液晶表示装置は、液晶層を一対の
対向する基板で挟持した液晶セルと、第１の偏光性薄膜
とを有する液晶表示部と、該液晶表示部とは離れて独立
して設けられ、前記液晶表示部の表示面と利用者の位置
との間の任意の位置に配置可能であって、前記液晶表示
部の前記第１の偏光性薄膜と対をなすように配置される
第２の偏光性薄膜とを有し、前記第１と第２の偏光性薄
膜を通して前記表示面での表示が視認可能とする。A liquid crystal display device according to the present invention comprises a liquid crystal cell having a liquid crystal layer sandwiched between a pair of opposing substrates, a liquid crystal display portion having a first polarizing thin film, and a separate and independent liquid crystal display portion. And can be arranged at any position between the display surface of the liquid crystal display unit and the position of the user, and are arranged so as to form a pair with the first polarizing thin film of the liquid crystal display unit. And a display on the display surface can be visually recognized through the first and second polarizing thin films.
【００１１】[0011]
【実施例】図１に、本発明の実施例による透過型の液晶
表示装置の構成図を示す。外形を点線で描いた１０は、
液晶表示部であり、２０は偏光性の薄膜あるいは偏光板
であり、３０は使用者で、４０は使用者でない第三者
（他人）である。本発明の実施例による液晶表示装置
は、液晶表示部１０と、それから離れて配置された偏光
板２０との組み合わせで構成される。外部の偏光板２０
は適当な保持部材（図示せず。）で支持して液晶表示部
１０と使用者３０との間に配置されてもよいし、あるい
は、使用者３０が手に持って使用することもできる。FIG. 1 is a block diagram of a transmission type liquid crystal display device according to an embodiment of the present invention. 10 with the outline drawn by dotted lines,
A liquid crystal display unit, 20 is a polarizing thin film or a polarizing plate, 30 is a user, and 40 is a third party (other person) who is not a user. The liquid crystal display device according to the embodiment of the present invention includes a combination of a liquid crystal display unit 10 and a polarizing plate 20 disposed apart from the liquid crystal display unit 10. External polarizing plate 20
May be disposed between the liquid crystal display unit 10 and the user 30 while being supported by a suitable holding member (not shown), or may be used while being held by the user 30.
【００１２】また、液晶表示部１０側に、公知技術によ
る止め具あるいはあるいはレールのような保持機構１６
をもうけて外部偏光板２０を着脱自在に装着することも
できる。この場合、液晶表示装置を使用しないときは、
液晶表示部１０からはずした外部偏光板２０を使用者だ
けが知っている場所に保管しておくことにより、外部の
第三者が表示装置を使用して無断で画像を見るというこ
とができなくできるので、セキュリティを保つことがで
きる。A holding mechanism 16 such as a stopper or a rail according to a known technique is provided on the liquid crystal display section 10 side.
And the external polarizing plate 20 can be detachably mounted. In this case, when not using the liquid crystal display,
By keeping the external polarizer 20 removed from the liquid crystal display unit 10 in a place known only to the user, an external third party cannot use the display device to view the image without permission. Yes, security can be maintained.
【００１３】実線で描いた液晶表示部１０の内部は、一
対の透明基板１１，１２で液晶層１３を挟持した液晶セ
ルと偏光板１４とバックライト光源１５とから構成され
ている。液晶セルがＳＴＮ型などであれば、偏光板１４
は直線偏光板で、外部の偏光板２０も直線偏光板で、両
偏光板の偏光軸方向が直交するような配置とされる。The inside of the liquid crystal display section 10 drawn by solid lines is composed of a liquid crystal cell having a liquid crystal layer 13 sandwiched between a pair of transparent substrates 11 and 12, a polarizing plate 14, and a backlight light source 15. If the liquid crystal cell is an STN type or the like, the polarizing plate 14
Is a linear polarizer, the external polarizer 20 is also a linear polarizer, and the polarizers are arranged so that the polarization axes of both polarizers are orthogonal to each other.
【００１４】この場合、使用者３０は、視線Ａの方向
で、偏光板２０を介して液晶表示部１０の表示を視認で
きる。しかし、そばにいる第三者４０は、視線Ｂの方向
では偏光板２０を介して表示面をみることはできない。
また、視線Ｃの方向には、液晶表示部１０がない。よっ
て、使用者３０のみが表示を視認でき、第三者４０は視
認できない。その視認範囲を狭く限定する効果は外部偏
光板２０を使用者３０側に近づければ近づけるほど、ま
た、面積を小さくすればするほど高くなる。In this case, the user 30 can visually recognize the display on the liquid crystal display unit 10 via the polarizing plate 20 in the direction of the line of sight A. However, the third person 40 in the vicinity cannot see the display surface via the polarizing plate 20 in the direction of the line of sight B.
Further, there is no liquid crystal display unit 10 in the direction of the line of sight C. Therefore, only the user 30 can visually recognize the display, and the third party 40 cannot. The effect of narrowing the viewing range is increased as the external polarizing plate 20 is moved closer to the user 30 and as the area is reduced.
【００１５】また、本願出願人が平成１１年９月２８日
に出願した特願平１１−２７４６３３号の明細書には、
液晶層の液晶分子が、基板に平行な方位角方向で、ラン
ダムな方向に配列するか、または基板に平行な面内で連
続的に変化している状態、いわゆるマルチドメイン構造
を有する液晶セルを使用し、その液晶セルを挟持する一
対の偏光板を円偏光板とする液晶表示装置が開示されて
いる。The specification of Japanese Patent Application No. 11-274633, filed on Sep. 28, 1999 by the present applicant,
A liquid crystal cell having a so-called multi-domain structure in which liquid crystal molecules of a liquid crystal layer are arranged in a random direction in an azimuthal direction parallel to the substrate or continuously change in a plane parallel to the substrate. A liquid crystal display device is disclosed in which a pair of polarizing plates that use the liquid crystal cell and sandwich the liquid crystal cell are circularly polarizing plates.
【００１６】第２の実施例においては、この先出願の明
細書に記載の液晶表示装置と同様に、図２に示すよう
に、液晶表示部１０側の偏光板を円偏光板５０に置き換
え、外部偏光板も円偏光板６０に置き換えて同様な効果
を得ることができる。いずれの円偏光板も、直線偏光板
と１／４波長板とで構成される。直線偏光板５１の透過
軸の方向ａと１／４波長板５２の遅相軸の方向ｂとが４
５°になるように配置されている。もう一方の外部円偏
光板６０も直線偏光板６１と１／４波長板６２とで構成
されている。In the second embodiment, similarly to the liquid crystal display device described in the specification of this prior application, as shown in FIG. The same effect can be obtained by replacing the polarizing plate with the circular polarizing plate 60. Each circularly polarizing plate includes a linearly polarizing plate and a quarter-wave plate. The direction a of the transmission axis of the linear polarizing plate 51 and the direction b of the slow axis of the quarter-wave plate 52 are 4
It is arranged to be 5 °. The other external circularly polarizing plate 60 is also composed of a linearly polarizing plate 61 and a 板 wavelength plate 62.
【００１７】円偏光板を使用する図２の実施例では。液
晶表示部１０内部の円偏光板５０と外部円偏光板６０と
の配置関係は、任意とすることができるので、外部の円
偏光板６０は、液晶表示部１０の表示面に対してほぼ平
行に配置するだけで、偏光軸の方向がどの方向にあって
も視認できるという利点がある。直線偏光板を使用する
場合には、外部の直線偏光板２０は、その偏光軸方向
が、内部の直線偏光板１４の偏光軸方向と特定の関係に
なるように、配置しないと表示を視認することができな
い。In the embodiment of FIG. 2 using a circular polarizer. Since the positional relationship between the circular polarizer 50 inside the liquid crystal display unit 10 and the external circular polarizer 60 can be arbitrarily set, the external circular polarizer 60 is substantially parallel to the display surface of the liquid crystal display unit 10. Has the advantage that it can be viewed in any direction of the polarization axis. When a linear polarizer is used, the display is visually recognized unless the external linear polarizer 20 is arranged so that its polarization axis direction has a specific relationship with the polarization axis direction of the internal linear polarizer 14. Can not do.
【００１８】図２の実施例では、液晶セルの前後に直線
偏光板と１／４波長板とを組み合わせた構成の円偏光板
を配置したが、図３に示した実施例においては、外部偏
光板として前述の実施例と同様な円偏光板６０を配置
し、それと反対側のバックライト光源側に、円偏光板の
代わりに円偏光板と同様な作用を持ったコレステリック
フィルム８０を配置した。この実施例でも両側に円偏光
板を使用した場合と同等な効果を得ることができる。液
晶セルは、図２の実施例と同様の構成である。In the embodiment shown in FIG. 2, a circular polarizer having a combination of a linear polarizer and a quarter-wave plate is arranged before and after the liquid crystal cell. In the embodiment shown in FIG. A circular polarizing plate 60 similar to that of the above-described embodiment was disposed as a plate, and a cholesteric film 80 having the same function as the circular polarizing plate was disposed on the opposite side of the backlight light source instead of the circular polarizing plate. Also in this embodiment, the same effect as that obtained when the circularly polarizing plates are used on both sides can be obtained. The liquid crystal cell has the same configuration as the embodiment of FIG.
【００１９】図１の透過型液晶表示装置のほかに、反射
型液晶表示装置の実施例を図４に示す。図４では、バッ
クライト光源はなく、７０はコレステリックフィルムを
備えた偏光機能を有する光反射板であり、６０は外部円
偏光板である。なお、反射型の場合に、液晶層をλ／４
板として機能させ、直線偏光板と組み合わせて用いても
よい。この場合も、図１の実施例と同じような効果を得
ることができる。FIG. 4 shows an embodiment of a reflection type liquid crystal display device in addition to the transmission type liquid crystal display device of FIG. In FIG. 4, there is no backlight light source, 70 is a light reflecting plate having a cholesteric film and having a polarizing function, and 60 is an external circular polarizing plate. In the case of the reflection type, the liquid crystal layer is λ / 4
It may function as a plate and be used in combination with a linear polarizing plate. In this case, the same effect as in the embodiment of FIG. 1 can be obtained.
【００２０】図５は眼鏡９０のレンズ部に直線偏光板あ
るいは円偏光板を使用し、それを外部偏光板２０とした
ものである。使用者３０は、眼鏡９０を装着して表示面
を視認することができる。眼鏡９０を装着しない第三者
は表示面を見ても映像は見えない。この場合、眼鏡９０
のレンズ部として、偏光性の薄膜を眼鏡のガラス板面に
形成したもの用いるか、あるいは眼鏡レンズの前に偏光
板を別途装着するようにしてもよい。この場合、眼鏡は
レンズ部が偏光板になるだけであるので、重量や形状は
通常の眼鏡と変わりが無く、使用に際しての違和感はな
い。直線偏光板や円偏光板は、眼鏡のレンズ部の全部あ
るいは一部に貼れば良いし、眼鏡の両眼あるいは片眼だ
けでもよい。FIG. 5 shows a configuration in which a linear polarizing plate or a circular polarizing plate is used for the lens portion of the glasses 90 and the external polarizing plate 20 is used. The user 30 can wear the glasses 90 and visually recognize the display surface. A third person who does not wear the glasses 90 cannot see the image even when looking at the display surface. In this case, the glasses 90
As the lens part, a polarizing thin film formed on the glass plate surface of spectacles may be used, or a polarizing plate may be separately mounted in front of the spectacle lens. In this case, since the spectacles only have a lens part as a polarizing plate, the weight and shape are the same as those of ordinary spectacles, and there is no uncomfortable feeling in use. The linearly polarizing plate or the circularly polarizing plate may be attached to all or a part of the lens portion of the spectacles, or may be only the binocular or only one eye of the spectacles.
【００２１】さらに、偏光性の違いを利用する立体映像
表示の場合には、左右レンズ部で偏光性の異なる偏光板
を用いればよい。その場合も、眼鏡を使用しない第三者
は立体表示を見ることはできない。Further, in the case of a stereoscopic image display utilizing a difference in polarization, a polarizing plate having different polarization may be used in the left and right lens portions. Even in that case, a third party who does not use glasses cannot see the stereoscopic display.
【００２２】さらに、図５の（Ｂ）は、帽子に図５の
（Ａ）の眼鏡を装着した実施例を示す。帽子の代りにサ
ンバイザーのつばなどに偏光板や眼鏡を装着してもよ
い。あるいは、図５の（Ｃ）のようにテレホンカードの
ようなカード型の偏光板（円偏光板）とし、必要なとき
にだけ使用者がそれを手に持って表示画面を見るように
してもよいであろう。カード型の場合には、携帯端末装
置の液晶ディスプレイに適用すると便利である。FIG. 5B shows an embodiment in which the glasses of FIG. 5A are attached to a hat. Instead of a hat, a polarizing plate or glasses may be attached to a brim of a sun visor or the like. Alternatively, as shown in FIG. 5C, a card-type polarizing plate (circular polarizing plate) such as a telephone card may be used, and the user may hold it and view the display screen only when necessary. Would be good. In the case of a card type, it is convenient to apply it to a liquid crystal display of a portable terminal device.
【００２３】以上、実施例に沿って本発明を説明した
が、本発明はこれらに制限されるものではない。例え
ば、種々の変更、改良、組み合わせが可能なことは当業
者に自明であろう。Although the present invention has been described with reference to the embodiments, the present invention is not limited to these embodiments. For example, it will be apparent to those skilled in the art that various modifications, improvements, and combinations are possible.
【００２４】[0024]
【発明の効果】以上説明したように、液晶表示装置にお
いて、偏光性薄膜を液晶表示部とは独立して使用者側に
近い位置に配置できるようにすることによって、第三者
が表示を見ることをできなくし、または困難とし、使用
者のみが表示を視認できて、セキュリティとプライバシ
ーを保護することが可能となる。本発明では、偏光性の
薄膜を液晶表示部とは独立して離間させて配置したの
で、従来の液晶表示装置と比べて製造コストのアップや
解像度の低下などがなく、また使用者の疲労等の問題も
ほとんどない。As described above, in the liquid crystal display device, the polarizing thin film can be arranged at a position close to the user independently of the liquid crystal display portion, so that a third party can view the display. This makes it impossible or difficult to do so that only the user can visually recognize the display and protect the security and privacy. In the present invention, the polarizing thin film is disposed separately from the liquid crystal display unit, so that there is no increase in manufacturing cost or reduction in resolution as compared with the conventional liquid crystal display device, and there is no user fatigue. There are almost no problems.
【図１】 本発明の実施例による透過型液晶表示装置の
使用時における液晶表示部と偏光板と使用者との配置関
係を示した図である。FIG. 1 is a diagram illustrating an arrangement relationship between a liquid crystal display unit, a polarizing plate, and a user when a transmission type liquid crystal display device according to an embodiment of the present invention is used.
【図２】 本発明の他の実施例による透過型液晶表示装
置の液晶層と円偏光板の配置関係を示した模式図であ
る。FIG. 2 is a schematic view illustrating an arrangement relationship between a liquid crystal layer and a circularly polarizing plate of a transmission type liquid crystal display device according to another embodiment of the present invention.
【図３】 本発明のさらに別の実施例による透過型液晶
表示装置の液晶層と円偏光板の別の配置関係を示した模
式図である。FIG. 3 is a schematic view showing another arrangement relationship between a liquid crystal layer and a circularly polarizing plate of a transmission type liquid crystal display device according to still another embodiment of the present invention.
【図４】 本発明の別の実施例による反射型液晶表示装
置の液晶層と偏光板の配置関係を示した模式図である。FIG. 4 is a schematic view illustrating an arrangement relationship between a liquid crystal layer and a polarizing plate of a reflection type liquid crystal display device according to another embodiment of the present invention.
【図５】 本発明の実施例による液晶表示装置のいくつ
かの使用例の図である。FIG. 5 is a diagram illustrating some usage examples of a liquid crystal display device according to an embodiment of the present invention.
１０ 液晶表示部 １１ 液晶層 １２、１３ ガラス基板 １４ 偏光板 １５ バックライト光源 １６ 偏光板保持機構 ２０ 偏光板 ３０ 使用者 ４０ 第三者 ５０、６０ 円偏光板 ７０ 光反射層 ８０ コレステリックフィルム ９０ 眼鏡 DESCRIPTION OF SYMBOLS 10 Liquid crystal display part 11 Liquid crystal layer 12, 13 Glass substrate 14 Polarizer 15 Back light source 16 Polarizer holding mechanism 20 Polarizer 30 User 40 Third party 50, 60 Circular polarizer 70 Light reflection layer 80 Cholesteric film 90 Glasses
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2H091 FA08X FA08Z FA26X FB02 FD06 FD25 GA06 LA09 LA16 MA10 5G435 AA01 BB12 BB17 DD04 FF05 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H091 FA08X FA08Z FA26X FB02 FD06 FD25 GA06 LA09 LA16 MA10 5G435 AA01 BB12 BB17 DD04 FF05
Claims (12)
液晶セルと、第１の偏光性薄膜とを有する液晶表示部
と、該液晶表示部とは離れて独立して設けられ、前記液
晶表示部の表示面と利用者の位置との間の任意の位置に
配置可能であって、前記液晶表示部の前記第１の偏光性
薄膜と対をなすように配置される第２の偏光性薄膜とを
有し、前記第１と第２の偏光性薄膜を通して前記表示面
での表示が視認可能な液晶表示装置。A liquid crystal cell having a liquid crystal layer sandwiched between a pair of opposing substrates; a liquid crystal display having a first polarizing thin film; and a liquid crystal display provided separately and separately from the liquid crystal display. A second polarizer, which can be arranged at an arbitrary position between the display surface of the display unit and the position of the user, and is arranged to form a pair with the first polarizable thin film of the liquid crystal display unit; A liquid crystal display device comprising: a thin film; and a display on the display surface can be visually recognized through the first and second polarizing thin films.
が、前記基板に平行な方位角方向で、ランダムな方向に
配列するか、または前記基板に平行な面内で連続的に変
化している状態を有し、前記第１と第２の偏光性薄膜が
円偏光板である請求項１記載の液晶表示装置。2. The liquid crystal layer, wherein the liquid crystal molecules of the liquid crystal layer are arranged in a random direction in an azimuthal direction parallel to the substrate, or continuously change in a plane parallel to the substrate. 2. The liquid crystal display device according to claim 1, wherein said first and second polarizing thin films are circularly polarizing plates.
が、前記基板に平行な方位角方向で、ランダムな方向に
配列するか、または前記基板に平行な面内で連続的に変
化している状態を有し、前記第１の偏光性薄膜がコレス
テリックフィルムであり、前記第２の偏光性薄膜が円偏
光板である請求項１記載の液晶表示装置。3. The liquid crystal layer according to claim 1, wherein the liquid crystal molecules of the liquid crystal layer are arranged in a random direction in an azimuth direction parallel to the substrate or continuously change in a plane parallel to the substrate. 2. The liquid crystal display device according to claim 1, wherein the first polarizing thin film is a cholesteric film, and the second polarizing thin film is a circular polarizing plate.
性薄膜を着脱自在とする手段を有する請求項１記載の液
晶表示装置。4. The liquid crystal display device according to claim 1, wherein said liquid crystal display section has means for making said second polarizing thin film detachable.
に形成あるいは装着されている請求項１記載の液晶表示
装置。5. The liquid crystal display device according to claim 1, wherein the second polarizing thin film is formed or mounted on a lens of spectacles.
ンズの表面に形成されている請求項１記載の液晶表示装
置。6. The liquid crystal display device according to claim 1, wherein the second polarizing thin film is formed on a surface of a contact lens.
全面もしくは一部に形成あるいは装着されている請求項
５あるいは６記載の液晶表示装置。7. The liquid crystal display device according to claim 5, wherein the second polarizing thin film is formed or mounted on the entire surface or a part of the lens.
ンズの少なくとも一方に形成あるいは装着されている請
求項５あるいは６記載の液晶表示装置。8. The liquid crystal display device according to claim 5, wherein said second polarizing thin film is formed or mounted on at least one of a pair of lenses by two sheets.
液晶セルと、前記液晶セルの一方の面に対向して配置さ
れた偏光機能を有する光反射層とを有する液晶表示部
と、該液晶表示部とは離れて独立して設けられ、前記液
晶表示部の表示面と利用者の位置との間の任意の位置に
配置可能であって、前記偏光機能を有する光反射層と対
をなすように配置される偏光性薄膜とを有し、前記偏光
性薄膜を通して前記表示面での表示が視認可能な液晶表
示装置。9. A liquid crystal display section comprising: a liquid crystal cell having a liquid crystal layer sandwiched between a pair of opposing substrates; and a light reflection layer having a polarizing function disposed to face one surface of the liquid crystal cell; It is provided separately from the liquid crystal display unit and can be arranged at any position between the display surface of the liquid crystal display unit and the position of the user, and pairs with the light reflection layer having the polarizing function. A liquid crystal display device comprising: a polarizing thin film disposed so as to form a display, and a display on the display surface can be visually recognized through the polarizing thin film.
が、前記基板に平行な方位角方向で、ランダムな方向に
配列するか、または前記基板に平行な面内で連続的に変
化している状態を有し、前記偏光性薄膜が円偏光板であ
る請求項９記載の液晶表示装置。10. The liquid crystal layer, wherein the liquid crystal molecules of the liquid crystal layer are arranged in a random direction in an azimuthal direction parallel to the substrate, or continuously change in a plane parallel to the substrate. The liquid crystal display device according to claim 9, wherein the polarizing film is a circularly polarizing plate.
膜を着脱自在とする手段を有する請求項９記載の液晶表
示装置。11. The liquid crystal display device according to claim 9, wherein said liquid crystal display unit has means for making said polarizing thin film detachable.
成あるいは装着されている請求項９記載の液晶表示装
置。12. The liquid crystal display device according to claim 9, wherein the polarizing thin film is formed or mounted on a lens of spectacles.
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| JP2000033942A JP4665138B2 (en) | 2000-02-10 | 2000-02-10 | Liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000033942A JP4665138B2 (en) | 2000-02-10 | 2000-02-10 | Liquid crystal display device |
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|---|---|
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| JP4665138B2 JP4665138B2 (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2000033942A Expired - Fee Related JP4665138B2 (en) | 2000-02-10 | 2000-02-10 | Liquid crystal display device |
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| KR20030038214A (en) * | 2001-11-06 | 2003-05-16 | 김연학 | a screen concealment-device of a monitor |
| JP2005331765A (en) * | 2004-05-20 | 2005-12-02 | Toshiba Matsushita Display Technology Co Ltd | Display device |
| JP2013254212A (en) * | 2013-07-16 | 2013-12-19 | Dainippon Printing Co Ltd | Image visualization control system |
| US9547112B2 (en) | 2013-02-06 | 2017-01-17 | Steelcase Inc. | Polarized enhanced confidentiality |
| US9568766B2 (en) | 2014-06-19 | 2017-02-14 | Boe Technology Group Co., Ltd. | Lighting system, lighting device and receiving device |
| US11106124B2 (en) | 2018-02-27 | 2021-08-31 | Steelcase Inc. | Multiple-polarization cloaking for projected and writing surface view screens |
| US11221497B2 (en) | 2017-06-05 | 2022-01-11 | Steelcase Inc. | Multiple-polarization cloaking |
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| US11221497B2 (en) | 2017-06-05 | 2022-01-11 | Steelcase Inc. | Multiple-polarization cloaking |
| US11106124B2 (en) | 2018-02-27 | 2021-08-31 | Steelcase Inc. | Multiple-polarization cloaking for projected and writing surface view screens |
| US11500280B2 (en) | 2018-02-27 | 2022-11-15 | Steelcase Inc. | Multiple-polarization cloaking for projected and writing surface view screens |
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