JPS61255320A - Shutter device for camera - Google Patents

Shutter device for camera

Info

Publication number
JPS61255320A
JPS61255320A JP9873185A JP9873185A JPS61255320A JP S61255320 A JPS61255320 A JP S61255320A JP 9873185 A JP9873185 A JP 9873185A JP 9873185 A JP9873185 A JP 9873185A JP S61255320 A JPS61255320 A JP S61255320A
Authority
JP
Japan
Prior art keywords
liquid crystal
cell
voltage
light
cells
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
JP9873185A
Other languages
Japanese (ja)
Inventor
Masato Katagiri
正人 片桐
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP9873185A priority Critical patent/JPS61255320A/en
Publication of JPS61255320A publication Critical patent/JPS61255320A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1313—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application

Abstract

PURPOSE:To obtain a shutter for camera which does not make any shuttering sound, by controlling a transmissive type liquid crystal cell under a no-light transmitting condition during the period from the moment when the cell is set to a light transmitting condition to the moment when the cell is set to a no-light transmitting condition again. CONSTITUTION:Transmissive liquid crystal cells 1-5 are arranged in a form which divides the maximum aperture area of a diaphragm and voltage impression and cut-off of voltage impression are individually made to each cell and, at the same time, the voltage impressing time to each cell is individually controlled. When no photograph is taken, no voltage is impressed across the cells 1-5 and the cells 1-5 do not transmit light. At the time of photographing, voltages are appropriately impressed across the cells 1-5 in accordance with the degree of the diaphragm. When, for example, a voltage is impressed across the transmissive liquid crystal cell 1 only, only the area corresponding to the cell 1 transmits light and, when voltages are impressed across all the cells 1-5, the area corresponding to the cells 1-5 transmits light. Moreover, the light transmitting time of each cell can be controlled, when the period from the moment when the voltage is impressed across the cell to the moment when the impressed voltage is cut off.

Description

【発明の詳細な説明】 この発明は透過形液晶によって絞り機能とシャッター機
能を備えたカメラ用シャッターに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera shutter having an aperture function and a shutter function using a transmissive liquid crystal.

一般にカメラで撮影する際は絞り開口に基づいて感光体
へ照射する光の通過面積を決定し、シャッター速度に基
づいて感光体へ照射する時間を決定しており、絞り及び
シャッターは一般的には各々別の機構部としてカメラに
内蔵されている。Generally, when taking a picture with a camera, the area through which light irradiates the photoreceptor is determined based on the aperture aperture, and the time for irradiating the photoreceptor is determined based on the shutter speed. Each is built into the camera as a separate mechanical part.

従来のカメラで用いられている絞り及びシャターは、高
水準の機械的精度が要求され、シャターが動作する際に
は、機械音が発生する。The aperture and shutter used in conventional cameras require a high level of mechanical precision, and when the shutter operates, mechanical noise is generated.

この発明はシャッター及び絞りの機械的構造を、液晶セ
ルによって構成することにより不要とし、シャッター音
を発生しないカメラ用シャッターを提供することを目的
とする。An object of the present invention is to provide a camera shutter that eliminates the need for mechanical structures of the shutter and diaphragm by using liquid crystal cells, and that does not generate shutter noise.

本発明の構成と動作原理を説明する。The configuration and operating principle of the present invention will be explained.

この発明は、透過形液晶セルの光透過状態及び光不透過
状態を利用して、シャッター機能と絞り機能を発生させ
るものである。透過形液晶セルは液晶に電圧を印加する
と光透過状態となり、電圧が印加されない状態では光不
透過となる。そこで、従来のカメラにおけるシャッター
に代わって、透過形液晶でシャッター開口部を塞ぐ形に
配置し、これに透過形液晶駆動用電圧を印加すると光透
過状態となり、続いて透過形液晶駆動用電圧を非印加と
すると光不透過となり、シャッターが閉じたのと同じ効
果がある。This invention utilizes the light transmitting state and the light non-transmitting state of a transmissive liquid crystal cell to generate a shutter function and an aperture function. A transmissive liquid crystal cell becomes a light-transmissive state when a voltage is applied to the liquid crystal, and becomes non-light-transmissive when no voltage is applied. Therefore, instead of the shutter in a conventional camera, a transmissive liquid crystal is placed to cover the shutter opening, and when a transmissive liquid crystal driving voltage is applied to it, it becomes a light transmitting state, and then the transmissive liquid crystal driving voltage is applied. When no voltage is applied, no light is transmitted, which has the same effect as a closed shutter.

また、透過形液晶駆動用電圧の印加時間の長短を制御す
ることにより、シャッターの低速度、高速度と同じ効果
が得られる。これにより、いわゆるシャッター機能が得
られる。In addition, by controlling the length of the application time of the voltage for driving the transmissive liquid crystal, the same effect as that of the low speed and high speed of the shutter can be obtained. This provides a so-called shutter function.

また、従来のカメラにおける絞り開口部面積を、複数の
透過形液晶セルで分割して塞ぎ、これらセルのうち、光
透過したいセルには透過形液晶駆動用電圧を印加し、光
透過したくないセルには透過形液晶駆動用電圧を非印加
とする。In addition, the aperture area of a conventional camera is divided and blocked by multiple transmissive liquid crystal cells, and a voltage for driving the transmissive liquid crystal is applied to the cell that you want to transmit light to, so that you do not want to transmit light. No voltage for driving a transmissive liquid crystal is applied to the cell.

これにより、絞り開口部の光透過面積を広（、又は狭く
することができ、いわゆる絞り機能を得る。更に、絞り
開口部面積を分割して塞いだ複数の透過形液晶セルのう
ち、光透過させるセルの光透過時間を長短制御すること
により、シャッター機能と絞り機能を同一の装置で実現
することもできる。As a result, the light transmission area of the diaphragm opening can be widened (or narrowed), and a so-called diaphragm function is obtained. By controlling the length of light transmission time of the cell, the shutter function and the aperture function can be realized in the same device.

以下、この発明の一実施例を図を用いて説明する。An embodiment of the present invention will be described below with reference to the drawings.

第１図は、カメラの対物レンズ、シャッター装置、感光
体の位置関係を示すカメラ内の概念図である。第１図に
おいて、レンズ（１）を通過した光　はシャッター装置
ｔ　（２１が開口した瞬間、感光体（３）上に達し、被
写体像を結ぶ。シャッター装置（２）は、いわゆる絞り
の程度によって、開口する面積が決定される。シャッタ
ー装置（２）の開口した面積は、いわゆるシャッター速
度に応じた時間経過後、光を遮断する。FIG. 1 is a conceptual diagram inside the camera showing the positional relationship among the objective lens, shutter device, and photoreceptor of the camera. In Fig. 1, the light that has passed through the lens (1) reaches the photoreceptor (3) at the moment when the shutter device t (21) opens and forms an image of the subject. , the opening area is determined.The opening area of the shutter device (2) blocks light after a lapse of time corresponding to the so-called shutter speed.

第２図は、シャッター装置平面図であり、第１図のシャ
ッター装置（２）を感光体（３）の方向から見たもので
ある。　透過形液晶セル（１）〜（５）は、絞りの最大
開口面積を分割する形に配置し、各透過形液晶セルの一
つ一つに対して、個別に電圧印加及び印加電圧断を行う
とともに、電圧印加時間を制御する。非撮影時は、透過
形液晶セル（１１〜（５）はいずれも電圧非印可であり
、光不透過となっている。撮影時は、いわゆる絞りの程
度によって透過形液晶セル（１１〜（５）に適宜電圧を
印可する。例えば、透過形液晶セル（１）だけに電圧印
可すれば、透過形液晶セル（１１に相当する面積だけ光
を透過し、透過形液晶セル（１）〜（５）の全てに電圧
印可すれば、透過形液晶セル（１１〜（５）に相当する
面積で光を透過する。また、いわゆるシャッター速度に
基づいて、透過形液晶セル（１）〜（５）に電圧印可し
た時から印加電圧断とするまでの時間を制御することに
より、光透過時間を制御できる。FIG. 2 is a plan view of the shutter device, showing the shutter device (2) of FIG. 1 viewed from the direction of the photoreceptor (3). Transmissive liquid crystal cells (1) to (5) are arranged in a manner that divides the maximum aperture area of the diaphragm, and voltage is applied and applied voltage is cut off individually to each transmissive liquid crystal cell. At the same time, the voltage application time is controlled. When not photographing, no voltage is applied to any of the transmissive liquid crystal cells (11 to (5)) and they do not transmit light.When photographing, the transmissive liquid crystal cells (11 to (5) ).For example, if a voltage is applied only to the transmissive liquid crystal cell (1), light will pass through an area corresponding to the transmissive liquid crystal cell (11), and the transmissive liquid crystal cells (1) to (5) will transmit light. ), the light will pass through the area corresponding to the transmissive liquid crystal cells (11 to (5)).Also, based on the so-called shutter speed, the transmissive liquid crystal cells (1) to (5) By controlling the time from when voltage is applied to when the applied voltage is cut off, the light transmission time can be controlled.

隣接する透過形液晶セルの間は、スペーサ（６）によっ
て区切られ、スペーサは電気的に絶縁物質であるととも
に光不透過物質である。これにより、透過形液晶セルに
駆動用電圧非印加時は、液晶が光不透過となることとス
ペーサが光不透過であることから、対物レンズから入射
する光は、シャッター装置で遮断される。Adjacent transmissive liquid crystal cells are separated by a spacer (6), which is an electrically insulating material and a light-opaque material. Accordingly, when no driving voltage is applied to the transmissive liquid crystal cell, the liquid crystal does not transmit light and the spacer does not transmit light, so that the light incident from the objective lens is blocked by the shutter device.

最も外側のスペーサとカメラのフレームの間は、光不透
過物質（７）により支持されている。Between the outermost spacer and the camera frame is supported by a light-opaque material (7).

第３図は、シャッター装置の断面図である。FIG. 3 is a sectional view of the shutter device.

液晶は、透明な封入ガラス（７）とスペーサ（６）で仕
切られたセル（１）〜（５）に密閉されている。The liquid crystal is sealed in cells (1) to (5) partitioned by transparent encapsulating glass (7) and spacers (6).

第４図は、セルの断面拡大図である。FIG. 4 is an enlarged cross-sectional view of the cell.

液晶（１）は、透明な封入ガラス（２）とスペーサ（３
）で形成される容器内に密閉される。封入ガラス（２）
の外面及び内面は平面かつ平行であり、対向する封入ガ
ラス（２）の内面は互いに平行である。The liquid crystal (1) consists of a transparent encapsulating glass (2) and a spacer (3).
) is sealed in a container formed by Encapsulated glass (2)
The outer and inner surfaces of are plane and parallel, and the inner surfaces of the opposing encapsulating glasses (2) are parallel to each other.

駆動用電極（４）はスペーサ（３）の容器内側に対向す
る位置関係に取りつけられ、リード線（５）が接続され
ている。スペーサ（３）及び駆動用電極（４）の、液晶
（１１に接触する面は、先非反射である。The drive electrode (4) is attached to the inside of the spacer (3) so as to face each other, and is connected to a lead wire (5). The surfaces of the spacer (3) and the driving electrode (4) that contact the liquid crystal (11) are non-reflective.

リード線（５）はスペーサ内部を通って配線されており
、各リード線間及び液晶間は絶縁されている。The lead wires (5) are routed through the spacer, and the lead wires and the liquid crystals are insulated.

この様に透過形液晶セルで構成されたシャッター装置は
、従来のカメラのシャッター装置の様な機械的構造を持
たず、製造技術上の高い機械的精度を必要としないため
、機械部品製造及び機械部品組立工程が技術的に緩和さ
れる。また、シャッター動作は液晶の状態変化によるの
で、機械的動作を伴わずシャッター動作音を発生しない
、このため、撮影環境の静粛性を維持させたまま撮影し
たい場合に効果的である。In this way, a shutter device constructed from a transmissive liquid crystal cell does not have a mechanical structure like a conventional camera shutter device, and does not require high mechanical precision in terms of manufacturing technology. The parts assembly process is technologically relaxed. Further, since the shutter operation is based on a change in the state of the liquid crystal, there is no mechanical operation and no shutter operation sound is generated, which is effective when it is desired to take pictures while maintaining the quietness of the shooting environment.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はカメラの対物レンズ、シャッター装置、感光体
の位置関係を示す概念図。第２図はシャッター装置平面
図。第３図はシャッター装置断面図。第４図はセル断面
拡大図である。 なお、第２図、第３図、第４図のＡＳＢを結ぶ位置は同
一である。FIG. 1 is a conceptual diagram showing the positional relationship among the objective lens, shutter device, and photoreceptor of the camera. FIG. 2 is a plan view of the shutter device. FIG. 3 is a sectional view of the shutter device. FIG. 4 is an enlarged cross-sectional view of the cell. Note that the positions where ASBs are connected in FIGS. 2, 3, and 4 are the same.

Claims (2)

【特許請求の範囲】[Claims] （１）光不透過状態の透過形液晶セルを、光透過状態と
した時点から再び光不透過状態とするまでの時間を制御
することにより、シャッター速度機能を発生させること
を特徴とするシャッター装置。(1) A shutter device that generates a shutter speed function by controlling the time from when a transmissive liquid crystal cell in a light-opaque state is brought into a light-transmissive state until it is brought back into a light-opaque state. . （２）カメラの絞り開口部を複数の透過形液晶セルで分
割し、光不透過状態から光透過状態とし再び光不透過状
態とする透過形液晶セルと、光不透過状態を維持する透
過形液晶セルとの比率を選択することにより、絞り機能
を発生させることを特徴とするシャッター装置。(2) The aperture aperture of the camera is divided into multiple transmissive liquid crystal cells, and the transmissive liquid crystal cell changes from a light-opaque state to a light-transmissive state and returns to a light-opaque state, and the transmissive liquid crystal cell maintains a light-opaque state. A shutter device that generates an aperture function by selecting the ratio to a liquid crystal cell.
JP9873185A 1985-05-09 1985-05-09 Shutter device for camera Pending JPS61255320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9873185A JPS61255320A (en) 1985-05-09 1985-05-09 Shutter device for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9873185A JPS61255320A (en) 1985-05-09 1985-05-09 Shutter device for camera

Publications (1)

Publication Number Publication Date
JPS61255320A true JPS61255320A (en) 1986-11-13

Family

ID=14227660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9873185A Pending JPS61255320A (en) 1985-05-09 1985-05-09 Shutter device for camera

Country Status (1)

Country Link
JP (1) JPS61255320A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051770A (en) * 1986-01-20 1991-09-24 Scanera S.C. Image processing device for controlling the transfer function of an optical system
US5337106A (en) * 1993-06-09 1994-08-09 Kowa Company, Ltd. Liquid-crystal image director for single-lens-reflex camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051770A (en) * 1986-01-20 1991-09-24 Scanera S.C. Image processing device for controlling the transfer function of an optical system
US5337106A (en) * 1993-06-09 1994-08-09 Kowa Company, Ltd. Liquid-crystal image director for single-lens-reflex camera

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