JPS63110427A - Liquid crystal shutter - Google Patents

Liquid crystal shutter

Info

Publication number
JPS63110427A
JPS63110427A JP25575586A JP25575586A JPS63110427A JP S63110427 A JPS63110427 A JP S63110427A JP 25575586 A JP25575586 A JP 25575586A JP 25575586 A JP25575586 A JP 25575586A JP S63110427 A JPS63110427 A JP S63110427A
Authority
JP
Japan
Prior art keywords
liquid crystal
slit
crystal shutter
shutter array
pieces
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
Application number
JP25575586A
Other languages
Japanese (ja)
Other versions
JP2594921B2 (en
Inventor
Yoshitake Nagashima
長島 良武
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP25575586A priority Critical patent/JP2594921B2/en
Publication of JPS63110427A publication Critical patent/JPS63110427A/en
Application granted granted Critical
Publication of JP2594921B2 publication Critical patent/JP2594921B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

PURPOSE:To reduce the weight and size of a camera main body and make the moving speed and shape of its slit controllable, by constituting a focal plane shutter by using a self-scanning type liquid crystal shutter. CONSTITUTION:This liquid crystal shutter array is constituted of NXM pieces of shutters, with the N pieces being in the horizontal direction and M pieces being in the vertical direction, and the number of the liquid crystal shutters is determined in accordance with the number of image pickup elements to be combined. The clock to cause the shutter array 1 to make self-scanning is inputted to a liquid crystal shutter array 1 from a slit moving clock generator 2 through an input signal line and CLK.IN. Moreover, M pieces of data for determining the slit shape and its transmittance are inputted to the shutter array 1 from an ND controlling section 4 through a signal line DIN. Therefore, an optional slit shape can be obtained and the transmittance of the slit at an optional position of the liquid crystal shutter array can be controlled when the pulse amplitude of the clock signal DIN is controlled by means of the ND controller 4.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はカメラ用のシャッタ素子に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a shutter element for a camera.

〔従来の技術〕[Conventional technology]

従来この種のフォーカル・プレーン・シャッタはメカニ
カル機構で構成されていたが、高速シャッタを切ると、
きの精度が悪い、重量/容積が大きく、作動するときの
音の発生、リセットするのにかかる時間が長い。メカ部
分が摩耗するため短寿命であるという問題点があった。
Conventionally, this type of focal plane shutter was composed of a mechanical mechanism, but when the high-speed shutter is released,
Poor accuracy, large weight/volume, noise when operating, and long time to reset. The problem was that the mechanical parts wore out and had a short lifespan.

(発明が解決しようとする問題点〕 本発明は、このような問題点を解決し、スリット移動の
速度制御、スリット形状の制御、外部制御信号との同期
を容易にとることができる液晶シャッタを提供すること
にある。
(Problems to be Solved by the Invention) The present invention solves these problems and provides a liquid crystal shutter that can easily control the speed of slit movement, control the slit shape, and synchronize with external control signals. It is about providing.

〔問題点を解決するための手段〕[Means for solving problems]

このような目的を達成するために、本発明は複数個の液
晶素子を2次元状に配列し、複数個の液晶素子を第1お
よび第2の走査方向に対応する第1および第2同期信号
に同期して自己走査することにより、光を透過するスリ
ットを形成し、スリットの第1および/または第2方向
の幅およびスリットの第1および/または第2走査方向
の走査速度を、スリットに透過させたい光量に応じて可
変設定できるようにしたことを特徴とする。
In order to achieve such an object, the present invention arranges a plurality of liquid crystal elements in a two-dimensional manner, and connects the plurality of liquid crystal elements to first and second synchronization signals corresponding to first and second scanning directions. A slit that transmits light is formed by self-scanning in synchronization with It is characterized by being able to be variably set according to the amount of light that is desired to be transmitted.

(作用〕 本発明は、スリット幅は液晶シャッタに印加する第1お
よび/または第2の同期信号のパルスの数に応じて可変
設定され、スリットの走査速度は第1および/または第
2の同期信号の周波数に応じて可変改定されるのてシャ
ッタ速度の精度が安定し、シャッタの作動音がなく、リ
セット時間も短く、シャッタの寿命も長くまたシャッタ
機構を小型化することができる。
(Function) In the present invention, the slit width is variably set according to the number of pulses of the first and/or second synchronization signal applied to the liquid crystal shutter, and the scanning speed of the slit is set variably according to the number of pulses of the first and/or second synchronization signal applied to the liquid crystal shutter. Since the shutter speed is variably revised according to the frequency of the signal, the accuracy of the shutter speed is stable, there is no shutter operation noise, the reset time is short, the life of the shutter is long, and the shutter mechanism can be downsized.

(実施例〕 以下、図面を参照して本発明の詳細な説明する。(Example〕 Hereinafter, the present invention will be described in detail with reference to the drawings.

第1図は本発明実施例における構成を示す。液晶シャッ
タ1は水平N、垂直MのNxM個のシャッタから構成さ
れており、液晶シャッタ数は組合せる撮像素子の数に応
じて決定される。つまり撮像画素数に対応させて液晶シ
ャッタを設ければよい。この入力は自己走査させるため
のクロックがスリット移動クロック発生器2から入力信
号線、 CLに−INを介して液晶シャッタアレイ1に
入力される。スリット形状とその透過率を決めるM個の
データが信号線DINを介して、ND制御部4から液晶
シャッタアレイ1に人力する。
FIG. 1 shows the configuration of an embodiment of the present invention. The liquid crystal shutter 1 is composed of N×M shutters (N horizontally and M vertically), and the number of liquid crystal shutters is determined according to the number of image pickup elements to be combined. In other words, it is sufficient to provide liquid crystal shutters corresponding to the number of imaging pixels. As for this input, a clock for self-scanning is inputted from the slit movement clock generator 2 to the liquid crystal shutter array 1 via the input signal line CL and -IN. M pieces of data determining the slit shape and its transmittance are manually input from the ND control section 4 to the liquid crystal shutter array 1 via the signal line DIN.

CLK・INには、制御信号■で制御されるスリット移
動クロック発生器2に接続されている。
CLK/IN is connected to a slit movement clock generator 2 controlled by a control signal (2).

Th−INは制御信号Jで制御されるスリット形状制御
データ発生器3および制御信号にで制御されるND制御
器4出力に接続されている。
Th-IN is connected to the output of the slit shape control data generator 3 controlled by the control signal J and the ND controller 4 controlled by the control signal.

第2図は本発明実施例におけるスリット形状の発生例を
示す。
FIG. 2 shows an example of the occurrence of slit shapes in the embodiment of the present invention.

第2図において、斜線の部分は遮光部分である。第3図
は、本発明実施例における液晶シャッタアレイの回路構
成の一例を示す。
In FIG. 2, the shaded area is a light shielding area. FIG. 3 shows an example of a circuit configuration of a liquid crystal shutter array in an embodiment of the present invention.

信号線[:LK−INはクロック信号線、CLK・1゜
CLに・2の2相駆動信号線、D・IN信号は入力端子
71〜7Mに接続される。41(1)〜4N (M)は
、BBDタイプの動作をする液晶素子で、信号線D・I
NのデータをCLK・1がH°゛で液晶セル41が透明
になり、 CLに・2が“Hパになったとき液晶セル4
1が不透明に液晶セル42が透明になる。
Signal line [:LK-IN is a clock signal line, CLK/1°CL/2 two-phase drive signal line, D/IN signal is connected to input terminals 71 to 7M. 41(1) to 4N (M) are liquid crystal elements that operate in a BBD type, and are connected to signal lines D and I.
When the data of N is CLK・1 becomes H°, the liquid crystal cell 41 becomes transparent, and when CL・2 becomes “H”, the liquid crystal cell 4 becomes transparent.
1 becomes opaque and the liquid crystal cell 42 becomes transparent.

したがってスリットの移動速度はCLに・INの周波数
に比例する。次にスリット形状の発生について説明する
Therefore, the moving speed of the slit is proportional to the frequency of CL and IN. Next, the generation of the slit shape will be explained.

例えば第2図の形状aのスリットを発生するにはクロッ
ク信号線D−IN入力端子71〜7Mを全て“H”にn
個りロック後゛1.°゛にすれば、nに比例してスリッ
ト幅が決まる。第2図の形状すにするためにはクロック
信号線D−INに第4図(B)に示すタイミングで順次
データを入力端子71〜7M入力すればよい。クロック
信号線D −INの振幅すなわち液晶セル41〜4Nに
加えられる電圧aを制御することによりスリットの透過
率を変えることができる。
For example, to generate a slit of shape a in Fig. 2, all clock signal line D-IN input terminals 71 to 7M are set to "H".
After individual lock 1. If n is set to n, the slit width will be determined in proportion to n. In order to obtain the shape shown in FIG. 2, data may be sequentially inputted to the input terminals 71 to 7M to the clock signal line D-IN at the timing shown in FIG. 4(B). The transmittance of the slit can be changed by controlling the amplitude of the clock signal line D-IN, that is, the voltage a applied to the liquid crystal cells 41 to 4N.

以上説明したように、スリット形状制御データ発生器3
およびスリット移動クロック発生器2により入力端子7
1〜7Mへ入力するパルスタイミングと信号線CLK・
1およびCLK・2に人力するパルスタイミングを制御
することで例えば第2図に示す形状a −fまでのスリ
ット形状およびその任意のスリット形状を作り出すこと
ができる。
As explained above, the slit shape control data generator 3
and input terminal 7 by slit movement clock generator 2.
Pulse timing input to 1 to 7M and signal line CLK・
By manually controlling the pulse timing applied to CLK.1 and CLK.2, it is possible to create, for example, the slit shapes a to f shown in FIG. 2, as well as any arbitrary slit shape.

また、ND制御器4によりクロック信号DINのパルス
振幅を制御することにより液晶シャッタアレイの任意の
位置のスリットの透過率を制御することも可能である。
Furthermore, by controlling the pulse amplitude of the clock signal DIN using the ND controller 4, it is also possible to control the transmittance of the slit at any position in the liquid crystal shutter array.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、自己走査型の液晶
シャッタを用いてフォーカル・ブレーン型のシャッタを
構成することにより、カメラ本体の重量を軽減できまた
形状も小さくできる。またスリットの移動速度、スリッ
トの形状の制御が可能となり、またさらに液晶セルに加
える電圧を変えれば透過率も変わるのでNOフィルタの
作用また部分的にシャッタ速度を変えND量もそれに応
じて可変にすれば露光量は常に一定にすることができる
という効果が得られる。
As described above, according to the present invention, by constructing a focal-brain type shutter using a self-scanning liquid crystal shutter, the weight and size of the camera body can be reduced. In addition, it is possible to control the moving speed of the slit and the shape of the slit, and if you change the voltage applied to the liquid crystal cell, the transmittance will also change, so the NO filter effect and the shutter speed can be partially changed so that the ND amount can be varied accordingly. This provides the effect that the exposure amount can always be kept constant.

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

第1図は本発明の実施例の構成を示すブロック図、 第2図は本発明によるスリット形状の発生例を示す説明
図、 第3図は本発明実施例における液晶シャッタアレイ1の
回路構成を示す回路図、 第4図(A) 、 (B)は本発明実施例における液晶
シャッタアレイ1を駆動するタイミングチャートである
。 1・・・液晶シャッタアレイ、 2・・・移動クロック発生器、 3・・・スリット形状制御データ発生器、4・・・ND
制御器、 41〜4N・・・画素電極、 45・・・駆動回路、 46〜49・・・転送回路、 71〜7M・・・信号入力端子、 CLKI 、CLK2・・・クロック信号線。 ≧ ト c  な   ) 卜 手続補正書 昭和61年12月9日
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is an explanatory diagram showing an example of the generation of slit shapes according to the present invention, and FIG. 3 is a circuit diagram of the liquid crystal shutter array 1 in the embodiment of the present invention. The circuit diagrams shown in FIGS. 4(A) and 4(B) are timing charts for driving the liquid crystal shutter array 1 in the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Liquid crystal shutter array, 2...Movement clock generator, 3...Slit shape control data generator, 4...ND
Controller, 41-4N... Pixel electrode, 45... Drive circuit, 46-49... Transfer circuit, 71-7M... Signal input terminal, CLKI, CLK2... Clock signal line. ≧ Toc) Written amendment to the procedure December 9, 1986

Claims (1)

【特許請求の範囲】 1)複数個の液晶素子を2次元状に配列し、前記複数個
の液晶素子を第1および第2の走査方向に対応する第1
および第2同期信号に同期して自己走査することにより
、光を透過するスリットを形成し、前記スリットの前記
第1および/または第2方向の幅および前記スリットの
第1および/または第2走査方向の走査速度を、当該ス
リットに透過させたい光量に応じて可変設定できるよう
にしたことを特徴とする液晶シャッタ。 2)特許請求の範囲第1項記載の液晶シャッタにおいて
、 前記スリットの幅を前記第1および/または第2同期信
号を同時に印加する液晶素子の個数に応じて可変設定す
るようにしたことを特徴とする液晶シャッタ。 3)特許請求の範囲第1項または第2項のいずれかに記
載の液晶シャッタにおいて、 前記スリットの前記第1および/または第2走査方向の
走査速度を前記第1および/または第2同期信号の周波
数に応じて、それぞれ、可変設定するようにしたことを
特徴とする液晶シャッタ。 4)特許請求の範囲第1項または第2項または第3項の
いずれかに記載の液晶シャッタにおいて、 前記第1および/または第2の同期信号の振幅に応じて
前記スリットの透過率を可変設定するようにしたことを
特徴とする液晶シャッタ。
[Scope of Claims] 1) A plurality of liquid crystal elements are arranged in a two-dimensional manner, and the plurality of liquid crystal elements are arranged in a first scanning direction and a second scanning direction.
and self-scanning in synchronization with a second synchronization signal to form a slit that transmits light, and the width of the slit in the first and/or second direction and the first and/or second scanning of the slit. A liquid crystal shutter characterized in that a scanning speed in a direction can be variably set according to the amount of light that is desired to be transmitted through the slit. 2) The liquid crystal shutter according to claim 1, characterized in that the width of the slit is variably set according to the number of liquid crystal elements to which the first and/or second synchronization signals are simultaneously applied. LCD shutter. 3) In the liquid crystal shutter according to claim 1 or 2, the scanning speed of the slit in the first and/or second scanning direction is determined by the first and/or second synchronization signal. A liquid crystal shutter characterized by variable settings depending on the frequency of each. 4) In the liquid crystal shutter according to any one of claims 1, 2, or 3, the transmittance of the slit is variable according to the amplitude of the first and/or second synchronization signal. A liquid crystal shutter characterized in that it can be set.
JP25575586A 1986-10-29 1986-10-29 LCD shutter device Expired - Fee Related JP2594921B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25575586A JP2594921B2 (en) 1986-10-29 1986-10-29 LCD shutter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25575586A JP2594921B2 (en) 1986-10-29 1986-10-29 LCD shutter device

Publications (2)

Publication Number Publication Date
JPS63110427A true JPS63110427A (en) 1988-05-14
JP2594921B2 JP2594921B2 (en) 1997-03-26

Family

ID=17283177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25575586A Expired - Fee Related JP2594921B2 (en) 1986-10-29 1986-10-29 LCD shutter device

Country Status (1)

Country Link
JP (1) JP2594921B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07239493A (en) * 1994-02-15 1995-09-12 Ind Technol Res Inst Nonmechanical camera shutter, diaphragm application method and applied device
JP2009186761A (en) * 2008-02-06 2009-08-20 Olympus Corp Shutter device for camera

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07239493A (en) * 1994-02-15 1995-09-12 Ind Technol Res Inst Nonmechanical camera shutter, diaphragm application method and applied device
JP2009186761A (en) * 2008-02-06 2009-08-20 Olympus Corp Shutter device for camera

Also Published As

Publication number Publication date
JP2594921B2 (en) 1997-03-26

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