JPH07218975A - Electronic diaphragm device - Google Patents
Electronic diaphragm deviceInfo
- Publication number
- JPH07218975A JPH07218975A JP6028795A JP2879594A JPH07218975A JP H07218975 A JPH07218975 A JP H07218975A JP 6028795 A JP6028795 A JP 6028795A JP 2879594 A JP2879594 A JP 2879594A JP H07218975 A JPH07218975 A JP H07218975A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- transparent conductive
- crystal cell
- conductive layer
- diaphragm
- 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
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 54
- 230000010287 polarization Effects 0.000 claims abstract description 42
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 41
- 230000005684 electric field Effects 0.000 claims abstract description 19
- 125000006850 spacer group Chemical group 0.000 claims abstract description 7
- 239000011521 glass Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005571 horizontal transmission Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 230000005570 vertical transmission Effects 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Diaphragms For Cameras (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液晶シャッターを用い
た電子絞り装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic diaphragm device using a liquid crystal shutter.
【０００２】[0002]
【従来の技術】種々のカメラには、レンズを介して撮像
素子に入射する光量を調整するために絞りが設けられて
いる。従来の絞りの１つは機械式のために、絞り動作の
タイミングに不安定さがあり、他のシステムとの同期化
が困難であった。特に、撮影対象物をストロボなどで照
明する際に、このストロボの発光の同期して絞りを調整
することが、機械式絞りでは困難であった。また、機械
式絞りには、その耐久性にも問題があり、この絞り以外
に頻繁に動く機械的構造がない場合、絞り以外のカメラ
の各部分の寿命が長いにもかかわらず、保守、点検又は
修理の期間が絞りに影響されてしまった。さらに、機械
式のため、経時変化も大きく取り扱いが面倒であった。2. Description of the Related Art Various cameras are provided with a diaphragm for adjusting the amount of light incident on an image sensor through a lens. Since one of the conventional diaphragms is mechanical, the timing of diaphragm operation is unstable, and it is difficult to synchronize with other systems. In particular, when illuminating an object to be photographed with a strobe or the like, it is difficult to adjust the diaphragm in synchronization with the light emission of the strobe with a mechanical diaphragm. In addition, the mechanical diaphragm also has a problem with its durability.If there is no mechanical structure that moves frequently other than this diaphragm, even if the parts of the camera other than the diaphragm have a long life, maintenance and inspection are required. Or the repair period was affected by the aperture. Further, since it is a mechanical type, it has a large change over time and is troublesome to handle.
【０００３】機械式絞りの欠点を改善したものとして
は、本願出願人が提案した調光液晶シートを用いた絞り
がある。これは、例えば、味の素株式会社及びタキロン
株式会社が開発製造販売している商品名「アクト」を用
いる。これは、２つの透明導電膜の間に、樹脂及び液晶
の液晶樹脂分散層を挟んだ構造であり、透明導電膜に供
給する電圧に応じて、光の透過量を任意に制御できる。
また、電気的に制御できる共に、機械的部分がないた
め、耐久性や、他のシステムとのタイミングの問題を解
決できる。As an improvement on the drawbacks of the mechanical diaphragm, there is an diaphragm using a light control liquid crystal sheet proposed by the applicant of the present application. For this, for example, the product name “ACT” developed, manufactured and sold by Ajinomoto Co., Inc. and Takiron Co., Ltd. is used. This is a structure in which a resin and a liquid crystal resin dispersion layer of liquid crystal are sandwiched between two transparent conductive films, and the amount of light transmission can be arbitrarily controlled according to the voltage supplied to the transparent conductive film.
Further, since it can be electrically controlled and there is no mechanical part, the problems of durability and timing with other systems can be solved.
【０００４】[0004]
【発明が解決しようとする課題】上述の調光液晶シート
を用いた絞りは、シート前面の光透過量を制御するため
に撮像素子への光量を調整できる。しかし、絞りを調整
しても、絞りを通過する光束の断面積が変化せず、被写
界深度を調整できなかった。The diaphragm using the above-mentioned light control liquid crystal sheet can adjust the light amount to the image pickup device in order to control the light transmission amount on the front surface of the sheet. However, even if the diaphragm was adjusted, the cross-sectional area of the light flux passing through the diaphragm did not change, and the depth of field could not be adjusted.
【０００５】したがって、本発明の目的は、電子制御で
きると共に、被写界深度も調整できる電子絞り装置の提
供にある。Therefore, it is an object of the present invention to provide an electronic diaphragm device which can be electronically controlled and whose depth of field can be adjusted.
【０００６】[0006]
【課題を解決するための手段】本発明の電子絞り装置
は、偏光角が異なるか又は同一である第１及び第２偏光
フィルタと、これら第１及び第２偏光フィルタ間に設け
られた液晶セルと、この液晶セルを制御する制御回路と
を具えている。そして、液晶セルは、対向する２個の透
明電極構体と、スペーサと、これら２個の電極構体及び
スペーサに挟まれた液晶物質とを有しており、２個の透
明電極構体の少なくとも一方の透明導電層が複数個に分
割されている。制御回路は、分割された透明導電層に選
択的に電界発生用の電圧を供給する。The electronic diaphragm device of the present invention comprises first and second polarizing filters having different or identical polarization angles, and a liquid crystal cell provided between the first and second polarizing filters. And a control circuit for controlling the liquid crystal cell. The liquid crystal cell has two opposing transparent electrode structures, a spacer, and a liquid crystal substance sandwiched between the two electrode structures and the spacer, and at least one of the two transparent electrode structures. The transparent conductive layer is divided into a plurality of parts. The control circuit selectively supplies a voltage for generating an electric field to the divided transparent conductive layers.
【０００７】また、透明電極構体は、ガラスと、このガ
ラス上に分割されて設けられた複数の透明導電層と、こ
の透明導電層上に設けられたディレクタ配向フィルム層
とで構成されている。なお、複数の透明導電層は、円形
透明導電層と、この円形透明導電層と絶縁され且つ同心
円上に配置されたドーナツ状透明導電層とを有してい
る。Further, the transparent electrode structure is composed of glass, a plurality of transparent conductive layers provided on the glass in a divided manner, and a director alignment film layer provided on the transparent conductive layer. The plurality of transparent conductive layers have a circular transparent conductive layer and a donut-shaped transparent conductive layer which is insulated from the circular transparent conductive layer and arranged concentrically.
【０００８】[0008]
【作用】第１及び第２偏光フィルタの偏光角度は、例え
ば９０度だけ異なっている。液晶セルに電界が供給され
ている場合は、この液晶セルは、通過する光を回転させ
ずに通過させる。よって、第１偏光フィルタを通過した
光は、そのまま液晶セルを通過するので、第２偏光フィ
ルタに通過を阻止される。しかし、液晶セルに電界が供
給されないと、第１偏光フィルタを通過した光は、液晶
セルで例えば、９０度回転するので、第２偏光フィルタ
を通過できる。また、第１及び第２変更フィルタの偏光
角度が同一の場合は、液晶セルに電界が供給された場合
に、入射光が通過し、電界が供給されない場合に入射光
の通過が阻止される。このように、液晶セルと第１及び
第２偏光フィルタとにより、入射光の通過及び阻止を制
御する。The polarization angles of the first and second polarizing filters differ by 90 degrees, for example. When an electric field is applied to the liquid crystal cell, the liquid crystal cell passes the light passing therethrough without rotating it. Therefore, the light that has passed through the first polarization filter passes through the liquid crystal cell as it is, and is blocked from passing through the second polarization filter. However, when the electric field is not supplied to the liquid crystal cell, the light that has passed through the first polarization filter is rotated by 90 degrees in the liquid crystal cell, for example, and therefore can pass through the second polarization filter. When the polarization angles of the first and second modification filters are the same, the incident light passes when the electric field is supplied to the liquid crystal cell, and the passage of the incident light is blocked when the electric field is not supplied. Thus, the liquid crystal cell and the first and second polarization filters control the passage and blocking of incident light.
【０００９】液晶セルに電界を供給するための透明導電
層が複数に分割されているため、各透明導電層に供給す
る電圧を制御することにより、光透過領域を液晶セル全
体にしたり、部分的にしたりして、光透過領域を任意に
制御して、通過光量を調整できる。また、光透過領域の
面積を調整できるので、被写界深度を制御できる。な
お、透明導電層が円形透明導電層及びドーナツ状透明導
電層の場合、絞りを小さな穴から大きな穴に順次大きく
できる。Since the transparent conductive layer for supplying an electric field to the liquid crystal cell is divided into a plurality of parts, the light transmitting region can be made the entire liquid crystal cell or partially by controlling the voltage supplied to each transparent conductive layer. Alternatively, the amount of passing light can be adjusted by arbitrarily controlling the light transmitting region. Moreover, since the area of the light transmitting region can be adjusted, the depth of field can be controlled. When the transparent conductive layer is a circular transparent conductive layer and a donut-shaped transparent conductive layer, the aperture can be increased sequentially from a small hole to a large hole.
【００１０】[0010]
【実施例】図１は、本発明の好適な実施例の説明図であ
り、図２は、絞りを厚さ方向に拡大した断面図である。
絞り１０は、偏光角が異なるか又は同一である第１偏光
フィルタ４２及び第２偏光フィルタ８２と、これら第１
及び第２偏光フィルタ間に設けられた液晶セル５４から
構成される。図２に詳細に示すように、液晶セル５４
は、ネマチック液晶物質１０６が、透明電極構体１０
０、１０２と、スペーサ１１４の間に挟まれる。各電極
構体は、ガラス１０８、透明導電層１１０、及びディレ
クタ配向フィルム層１１２から構成される。なお、透明
電極構体１００の透明導電層１１０は、連続した平面で
あり、リード線１１３を介して、基準電位源、例えば、
接地に接続される。しかし、透明電極構体１０２の透明
導電層１１０は、円形透明導電層１２と、この円形透明
導電層１２と絶縁され且つ同心円上に配置された第１ド
ーナツ状透明導電層１４と、この導電層１４と絶縁され
且つ同心円上に配置された第２ドーナツ状透明導電層１
６とから構成される。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a preferred embodiment of the present invention, and FIG. 2 is a sectional view in which a diaphragm is enlarged in the thickness direction.
The diaphragm 10 includes a first polarization filter 42 and a second polarization filter 82 having different or identical polarization angles, and the first polarization filter 42 and the first polarization filter 82.
And a liquid crystal cell 54 provided between the second polarization filters. As shown in detail in FIG. 2, the liquid crystal cell 54
The nematic liquid crystal material 106 is the transparent electrode structure 10.
It is sandwiched between 0 and 102 and the spacer 114. Each electrode assembly is composed of glass 108, transparent conductive layer 110, and director oriented film layer 112. The transparent conductive layer 110 of the transparent electrode structure 100 is a continuous flat surface, and a reference potential source such as, for example,
Connected to ground. However, the transparent conductive layer 110 of the transparent electrode structure 102 includes the circular transparent conductive layer 12, the first doughnut-shaped transparent conductive layer 14 which is insulated from the circular transparent conductive layer 12 and arranged concentrically, and the conductive layer 14. Second donut-shaped transparent conductive layer 1 insulated from and arranged concentrically
6 and 6.
【００１１】第２ドーナツ状透明導電層１６は、リード
線８０を介して電子スイッチ２０に接続される。また、
第１ドーナツ状透明導電層１４及び円形透明導電層１２
も、リード線８２及び８４（図２には示さず）を介して
電子スイッチ２０に接続される。なお、リード線８２及
び８４は、絶縁された透明導体である。これら透明導体
は、例えば、酸化錫である。電子スイッチ２０は、制御
回路２４の制御により、透明導電層１２、１４及び１６
を選択的に液晶駆動回路２２に接続する。The second donut-shaped transparent conductive layer 16 is connected to the electronic switch 20 via a lead wire 80. Also,
First donut-shaped transparent conductive layer 14 and circular transparent conductive layer 12
Is also connected to the electronic switch 20 via leads 82 and 84 (not shown in FIG. 2). The lead wires 82 and 84 are insulated transparent conductors. These transparent conductors are, for example, tin oxide. The electronic switch 20 controls the transparent conductive layers 12, 14 and 16 under the control of the control circuit 24.
Are selectively connected to the liquid crystal drive circuit 22.
【００１２】次に、液晶セル５４及び偏光フィルタ４
６、８２を用いた絞りの動作原理を、図３を参照して説
明する。なお、図３では、透明導電層が分割されていな
いものとする。液晶絞り１０を構成する第１偏光フィル
タ４２及び第２偏光フィルタ８２の偏光角度は、例えば
９０度だけ異なっている。即ち、偏光フィルタ４２は、
垂直透過軸４６及び水平吸収軸４８を有し、偏光フィル
タ８２は、垂直吸収軸８４及び水平透過軸８６を有す
る。液晶セル５４は、可変光学遅延器として作用し、電
界が供給されている場合は、この液晶セルは、通過する
光を回転させずに通過させる。よって、偏光フィルタ４
２を通過した光は、そのまま液晶セル５４を通過する
が、偏光フィルタ８２に通過を阻止される。しかし、液
晶セルに電界が供給されないと、偏光フィルタ４２を通
過した光は、液晶セル５４で９０度回転するので、偏光
フィルタ８２を通過できる。Next, the liquid crystal cell 54 and the polarization filter 4
The operating principle of the diaphragm using the Nos. 6 and 82 will be described with reference to FIG. In addition, in FIG. 3, it is assumed that the transparent conductive layer is not divided. The polarization angles of the first polarization filter 42 and the second polarization filter 82 that form the liquid crystal diaphragm 10 differ by 90 degrees, for example. That is, the polarization filter 42 is
The vertical filter has a vertical transmission axis 46 and a horizontal absorption axis 48, and the polarization filter 82 has a vertical absorption axis 84 and a horizontal transmission axis 86. The liquid crystal cell 54 acts as a variable optical delay device, and when the electric field is supplied, the liquid crystal cell 54 allows the light passing therethrough to pass without rotating. Therefore, the polarization filter 4
The light passing through 2 passes through the liquid crystal cell 54 as it is, but is blocked by the polarization filter 82. However, when an electric field is not supplied to the liquid crystal cell, the light that has passed through the polarization filter 42 is rotated by 90 degrees in the liquid crystal cell 54 and can therefore pass through the polarization filter 82.
【００１３】上述では、偏光フィルタ４２及び８２の偏
光角度が９０度だけ異なっていたが、これら２つの偏光
フィルタの偏光角度が同一であってもよい。この場合
は、液晶セル５４に電界が供給されている場合は、この
液晶セルは、通過する光を回転させずに通過させる。よ
って、偏光フィルタ４２を通過した光は、そのまま液晶
セル５４及び偏光フィルタ８２を通過する。しかし、液
晶セルに電界が供給されないと、偏光フィルタ４２を通
過した光は、液晶セル５４で９０度回転するので、偏光
フィルタ８２で阻止される。In the above description, the polarization angles of the polarization filters 42 and 82 differ by 90 degrees, but the polarization angles of these two polarization filters may be the same. In this case, when an electric field is supplied to the liquid crystal cell 54, the liquid crystal cell allows the light passing therethrough to pass without rotating. Therefore, the light passing through the polarization filter 42 passes through the liquid crystal cell 54 and the polarization filter 82 as it is. However, when an electric field is not supplied to the liquid crystal cell, the light passing through the polarization filter 42 is rotated by 90 degrees in the liquid crystal cell 54, and is blocked by the polarization filter 82.
【００１４】図４は、図３に示す液晶セル５４の導電層
１１０間に電位差を与えて、交番電界を加えた場合の説
明図である。交番電界Ｅにより、正の異方性である液晶
物質１０６内の大多数の面非接触ディレクタ１２０は、
電極構体の表面に直角である電気力線の方向１２１に沿
ってほぼその端部を連ねて整列する。よって、液晶セル
を通過する光がそのまま通過する。FIG. 4 is an explanatory diagram when a potential difference is applied between the conductive layers 110 of the liquid crystal cell 54 shown in FIG. 3 and an alternating electric field is applied. Due to the alternating electric field E, the majority of the surface non-contact directors 120 in the liquid crystal material 106 that are positively anisotropic are
The ends of the electrode structure are aligned and aligned along the direction 121 of the line of electric force that is perpendicular to the surface of the electrode structure. Therefore, the light passing through the liquid crystal cell passes as it is.
【００１５】図５は、図３に示す液晶セル５４の導電層
１１０間の電位差を除去した場合の説明図である。面非
接触ディレクタ１２０が図示のような方向になるため、
液晶セルを通過する光が９０度回転する。このように動
作する液晶はπセルと呼ばれている。FIG. 5 is an explanatory diagram when the potential difference between the conductive layers 110 of the liquid crystal cell 54 shown in FIG. 3 is removed. Since the surface non-contact director 120 is oriented as shown,
Light passing through the liquid crystal cell rotates 90 degrees. A liquid crystal that operates in this way is called a π cell.
【００１６】上述から理解できる如く、液晶セル５４及
び偏光フィルタ４２、８２の組合せを用い、液晶セルに
交番電界を選択的に供給することにより、光の通過を制
御できる。まず、偏光フィルタ４２及び８２の偏光角度
が９０度だけ異なっている場合を考察する。制御回路２
４が、電子スイッチ２０の総てをオンにした場合、駆動
回路２２は、透明導電層１２、１４及び１６に交番電圧
を供給して、液晶セル５４全体に交番電界を供給する。
よって、絞り１０全体で光の通過を阻止する。次に、電
子スイッチ２０を制御して、リード線８４のスイッチを
オフにすると、透明導電層１２のみに交番電圧が供給さ
れないので、透明導電層１２の領域のみ、光が通過す
る。また、リード線８４及び８２のスイッチをオフにす
ると、透明導電層１２及び１４に交番電圧が供給され
ず、透明導電層１２及び１４の領域で光が通過する。す
なわち、絞りが更に開いたことになる。さらに、電子ス
イッチ２０の総てのスイッチをオフにすると、透明導電
層１２、１４及び１６の総ての領域で光が通過する。よ
って、絞りが完全に開いたことになる。As can be understood from the above, the passage of light can be controlled by using the combination of the liquid crystal cell 54 and the polarization filters 42 and 82 and selectively supplying an alternating electric field to the liquid crystal cell. First, consider the case where the polarization angles of the polarization filters 42 and 82 differ by 90 degrees. Control circuit 2
When 4 turns on all of the electronic switches 20, the drive circuit 22 supplies an alternating voltage to the transparent conductive layers 12, 14 and 16 to supply an alternating electric field to the entire liquid crystal cell 54.
Therefore, the stop 10 as a whole blocks the passage of light. Next, when the electronic switch 20 is controlled to turn off the switch of the lead wire 84, the alternating voltage is not supplied only to the transparent conductive layer 12, so that the light passes through only the region of the transparent conductive layer 12. Further, when the switches of the lead wires 84 and 82 are turned off, the alternating voltage is not supplied to the transparent conductive layers 12 and 14, and the light passes through the regions of the transparent conductive layers 12 and 14. That is, the aperture has been opened further. Further, when all the switches of the electronic switch 20 are turned off, light passes through all the areas of the transparent conductive layers 12, 14 and 16. Therefore, the aperture is completely open.
【００１７】つぎに、偏光フィルタ４２及び８２の偏光
角度が同一の場合を考察する。この場合は、交番電界を
供給した場合に光が通過する。よって、リード線８４の
スイッチのみをオンにすれば、透明導電層１２の領域で
光が通過する。また、リード線８４及び８２のスイッチ
をオンにすれば、透明導電層１２及び１４の領域で光が
通過する。さらに、３個のスイッチ総てをオンにすれ
ば、透明導電層１２、１４及び１６の領域の総てで光が
通過する。よって、任意に絞り調整が可能になる。Next, consider the case where the polarization angles of the polarization filters 42 and 82 are the same. In this case, the light passes when an alternating electric field is supplied. Therefore, if only the switch of the lead wire 84 is turned on, light passes through the region of the transparent conductive layer 12. When the switches of the lead wires 84 and 82 are turned on, light passes through the regions of the transparent conductive layers 12 and 14. Further, if all three switches are turned on, light will pass through all of the regions of the transparent conductive layers 12, 14 and 16. Therefore, the aperture can be adjusted arbitrarily.
【００１８】上述は、本発明の好適な実施例について説
明したが、本発明の要旨を逸脱することなく種々の変形
及び変更が可能である。例えば、透明導電層の数は、実
施例では３個であったが、任意の個数でよい。また、透
明導電層の各々の形は、矩形でもよい。Although the preferred embodiment of the present invention has been described above, various modifications and changes can be made without departing from the spirit of the present invention. For example, the number of transparent conductive layers is three in the embodiment, but may be any number. The shape of each of the transparent conductive layers may be rectangular.
【００１９】[0019]
【発明の効果】上述の如く本発明によれば、絞りの程度
を電子制御できると共に、被写界深度も調整できる。ま
た、機械的駆動部分を含んでいないので、高精度の制御
が可能になると共に、取り扱いも簡単である。As described above, according to the present invention, the degree of the aperture can be electronically controlled and the depth of field can be adjusted. In addition, since it does not include a mechanical drive part, it is possible to control with high accuracy and the handling is easy.
【図１】本発明の好適な実施例の説明図である。FIG. 1 is an explanatory diagram of a preferred embodiment of the present invention.
【図２】絞りの拡大断面図である。FIG. 2 is an enlarged sectional view of a diaphragm.
【図３】絞りの動作原理を説明する図である。FIG. 3 is a diagram illustrating the operating principle of a diaphragm.
【図４】液晶セルの電界供給時の説明図である。FIG. 4 is an explanatory diagram when an electric field is supplied to the liquid crystal cell.
【図５】電界を供給しないときの液晶セルの説明図であ
る。FIG. 5 is an explanatory diagram of a liquid crystal cell when an electric field is not supplied.
１０ 絞り １２、１４、１６ 透明導電層 ２０ 電子スイッチ ２２ 液晶駆動回路 ２４ 電子スイッチ制御回路 ４２、８２ 偏光フィルタ ５４ 液晶セル 10 diaphragm 12, 14, 16 transparent conductive layer 20 electronic switch 22 liquid crystal drive circuit 24 electronic switch control circuit 42, 82 polarization filter 54 liquid crystal cell
Claims (3)
び第２偏光フィルタと、 該第１及び第２偏光フィルタ間に設けられた液晶セル
と、 該液晶セルを制御する制御回路とを具え、 上記液晶セルは、対向する２個の透明電極構体と、スペ
ーサと、上記２個の電極構体及び上記スペーサに挟まれ
た液晶物質とを有し、 上記２個の透明電極構体の少なくとも一方の透明導電層
が複数個に分割されており、 上記制御回路は、上記分割された透明導電層に選択的に
電界発生用の電圧を供給することを特徴とする電子絞り
装置。1. A first and a second polarization filter having different or the same polarization angle, a liquid crystal cell provided between the first and the second polarization filter, and a control circuit for controlling the liquid crystal cell. The liquid crystal cell has two transparent electrode structures facing each other, a spacer, and a liquid crystal substance sandwiched between the two electrode structures and the spacer, and at least one of the two transparent electrode structures. The transparent diaphragm is divided into a plurality of layers, and the control circuit selectively supplies a voltage for generating an electric field to the divided transparent conductive layers.
ス上に分割されて設けられた複数の透明導電層と、該透
明導電層上に設けられたディレクタ配向フィルム層とを
有することを特徴とする請求項１の電子絞り装置。2. The transparent electrode structure comprises glass, a plurality of transparent conductive layers provided on the glass in a divided manner, and a director alignment film layer provided on the transparent conductive layer. The electronic diaphragm device according to claim 1.
層と、該円形透明導電層と絶縁され且つ同心円上に配置
されたドーナツ状透明導電層とを有することを特徴とす
る請求項２の電子絞り装置。3. The plurality of transparent conductive layers include a circular transparent conductive layer and a donut-shaped transparent conductive layer which is insulated from the circular transparent conductive layer and arranged concentrically. Electronic diaphragm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6028795A JPH07218975A (en) | 1994-01-31 | 1994-01-31 | Electronic diaphragm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6028795A JPH07218975A (en) | 1994-01-31 | 1994-01-31 | Electronic diaphragm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07218975A true JPH07218975A (en) | 1995-08-18 |
Family
ID=12258367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6028795A Pending JPH07218975A (en) | 1994-01-31 | 1994-01-31 | Electronic diaphragm device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07218975A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016534392A (en) * | 2013-09-23 | 2016-11-04 | エルシー−テック ディスプレイズ アーベーＬｃ−Ｔｅｃ Ｄｉｓｐｌａｙｓ Ａｂ | High contrast electro-optic LCD camera iris |
| US10012884B2 (en) | 2013-09-23 | 2018-07-03 | Lc-Tec Displays Ab | High contrast electro-optic liquid crystal camera iris providing angle independent transmission for uniform gray shades |
| US10401700B2 (en) | 2013-09-23 | 2019-09-03 | Lc-Tec Displays Ab | High contrast electro-optic liquid crystal camera iris including liquid crystal material mixed with a dye to improve achromatic performance |
| CN110888251A (en) * | 2019-12-05 | 2020-03-17 | 黄剑鸣 | Annular liquid crystal dimming unit, aperture structure and electronic equipment |
| CN110888252A (en) * | 2019-12-05 | 2020-03-17 | 黄剑鸣 | Array type aperture structure and camera electronic equipment |
-
1994
- 1994-01-31 JP JP6028795A patent/JPH07218975A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016534392A (en) * | 2013-09-23 | 2016-11-04 | エルシー−テック ディスプレイズ アーベーＬｃ−Ｔｅｃ Ｄｉｓｐｌａｙｓ Ａｂ | High contrast electro-optic LCD camera iris |
| US10012884B2 (en) | 2013-09-23 | 2018-07-03 | Lc-Tec Displays Ab | High contrast electro-optic liquid crystal camera iris providing angle independent transmission for uniform gray shades |
| US10401700B2 (en) | 2013-09-23 | 2019-09-03 | Lc-Tec Displays Ab | High contrast electro-optic liquid crystal camera iris including liquid crystal material mixed with a dye to improve achromatic performance |
| US10928698B2 (en) | 2013-09-23 | 2021-02-23 | Lc-Tec Displays Ab | High contrast liquid crystal light control device providing angle independent variable transmission of incident light for uniform gray shades |
| CN110888251A (en) * | 2019-12-05 | 2020-03-17 | 黄剑鸣 | Annular liquid crystal dimming unit, aperture structure and electronic equipment |
| CN110888252A (en) * | 2019-12-05 | 2020-03-17 | 黄剑鸣 | Array type aperture structure and camera electronic equipment |
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