JP2004020744A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent adverse effect on the quality of information imprinted on a film due to deterioration of an electrical part, damage by static electricity or deterioration of a property when a camera is used for a long period of time. <P>SOLUTION: In the camera, recording of high definition information in which numbers, characters or the like can be discriminated is realized, by preventing imprinting by deteriorated imprinting circuit or LED by setting a signal of one pulse or more not to make an imprinting LED81 emit light to a port before the information to be recorded prior to the feeding of the film when imprinting the information. <P>COPYRIGHT: (C)2004,JPO

Description

【００６４】
ここで、０はＬレベルを示し、１はＨレベルを示しているものとする。
この表１は、予めメインＣＰＵからサブＣＰＵへ通信で伝送されているデータを表している。このデータはサブＣＰＵのメモリに格納されているテーブルの状態を示しており、「写し込み開始の通信受信」ととも似、列番号「０」のデータをポートＰ００〜Ｐ０６に出力する。意向、ＬＥＤＯＮ信号の立ち下がりを検出したら、メモリを参照するアドレスを更新し、サブＣＰＵのポートへデータを出力する。この処理は、ＣＰＵの実行速度が遅いため、割り込みを使って処理される。
【００６５】
次に、図１４及び図１５のフローチャートを参照して、サブＣＰＵ８１の処理動作について説明する。
【００６６】
まず、電源の供給によりサブＣＰＵ８１がイニシャライズされる（ステップＳ４１）。この処理において、ポートの設定、ＲＡＭの初期設定、１秒毎の割込み設定等が行われる。次に、通信要求があるか否かを判定する（ステップＳ４２）。この判定で通信要求があった場合（ＹＥＳ）、通信要求（ＣＥＮ）信号の立ち上がりで割込みフラグ１が設定されているため、通信要求フラグが立っていれば、通信処理を行い、メインＣＰＵからのコマンドを受信する（ステップＳ４３）。一方、通信要求が無ければ（ＮＯ）、後述するステップＳ５１に移行する。
【００６７】
次に、受信したコマンドに従った処理に振り分ける（ステップＳ４４）。これは、コマンドに応じた処理が多数あるが詳細な説明は省略し、代表的に、低消費電流モード処理、ＲＡＭデータの読み／書き処理、割込みカウントリセット処理を例として説明する。例えば、低消費電流モードヘの移行処理を行う（ステップＳ４５）。これは、予め設定した割込みが発生すると、その処理を行った後、また低消費電流モードになる。また、ＲＡＭデータの読み／書き処理を行う（ステップＳ４６）。コマンドに続いて、通信が必要な場合には、引き続き通信を行う。
【００６８】
また、写し込み開始コマンドを受信した場合には、続いて発生するＬＥＤＯＮ信号の割込みの回数をカウントするカウンタをリセット「０」し（ステップＳ４７）、割り込み分岐を許可する（ステップＳ４８）。また、写込みモードは、ＤＭＯＤＳＷ８５がオンされる度に、「写し込みしない」→「年月日」→「月日年」→「日月年」→「日時分」→「写し込みしない」の順で切り替わる。
【００６９】
次に、写し込みに必要なデータの第０列目の信号をポートに出力する（ステップＳ４９）。（ステップＳ４９）。例えば、図１０の０列目（Ａ）のデータは、Ｐ０６から順に、０，０，０，０，０，０，０であり、１列目のデータも同様である。ＬＥＤを点灯させるための実際のデータは２列目からとなる。
【００７０】
そして、写し込み準備完了フラグに１を設定する（ステップＳ５０）。次に、１秒毎の割込みが発生したか否かを検出する（ステップＳ５１）。割込みが発生した場合（ＹＥＳ）、１秒の計時を行い、年月日時分秒を更新するカレンダ処理を行う（ステップＳ５２）。このカレンダ処理の終了後、若しくはステップＳ５１で割込みが発生しなかった場合には（ＮＯ）、キー入力による割込みがあったか否かを検出する（ステップＳ５３）。
【００７１】
このステップＳ５３で、割り込みがあった場合（ＹＥＳ）、キー入力に応じた処理を行う（ステップＳ５４）。これは、ＤＭＯＤＳＷを短い時間間隔で押された場合には、写込みモードの変更を行い、一方、２秒以上押し続けられた場合には、時間データの修正処理を行う。時間データの修正処理では、ＤＳＥＴＳＷを押す度に、データを更新し、ＤＭＯＤＳＷを押す度に、「年」→「月」→「日」→「時」→「分」→「修正終了」と、修正するデータの場所を更新する。このキー入力に応じた処理の終了後若しくは、ステップＳ５３で割り込みがなかった場合には（ＮＯ）、上記ステップＳ４２へ戻る。
【００７２】
次に図１５に示すフローチャートを参照して、サブＣＰＵ８１の割込み分岐処理について説明する。
ＬＥＤＯＮ信号の立ち下がりを検出したら、割込み分岐してくる。
まず、写込み準備完了か否かを判定する（ステップＳ６１）。この判定は、写し込み準備完了フラグの有無で判断する。例えば、フラグ１であれば、準備完了しているものと判断され、フラグ０であれば、後述するステップＳ６６へ移行する。
【００７３】
そして、フラグ１であった場合（ＹＥＳ）、ＬＥＤＯＮ信号のカウント数をカウントする（ステップＳ６２）。これは、写し込むデータによって、列数が変化する為に、予め写し込むデータから列数を求める。次に、前記カウント数と、所定の列数を比較し（ステップＳ６３）、カウント数が列数を超えていた場合（ＹＥＳ）、写込みが終了したことと判断され、写込み用ポートをＬレベルにして（ステップＳ６６）、写込み準備完了を解除し割り込みの禁止処理を行う（ステップＳ６７）。具体的には「写込み準備完了フラグ」を０にリセットする。そして、割込み分岐からリターンして写込みを終了する。
【００７４】
また、前記ステップＳ６３の判定で、カウント数が列数以下であった場合には（ＮＯ）、次の列番号に写し込むデータをテーブルを参照して求め（ステップＳ６４）、写込み用ポートにそのデータを出力して（ステップＳ６５）、割り込み処理へリターンする。例えば、図１０の２列目のデータは、Ｐ００からＰ０６へ順に、１，０，０，０，１，１，０である。
【００７５】
次に図１６乃至図１８を参照して、第２の実施形態について説明する。
前述した第１の実施形態では、写し込みをしない期間は、ポートにＬレベルを出力していたが、この第２の実施形態では、ポートをハイインピーダンス（Ｈｉ−ｚ）状態にするところが異なっている。
【００７６】
図１６に示すタイミングチャートを参照して写し込みのタイミングについて説明する。
サブＣＰＵ８１が、「写し込み開始通信」のコマンドを受信した場合、サブＣＰＵ８１は、Ｐ００〜Ｐ０６までのレベルをハイインピーダンス（Ｈｉ−ｚ）に設定する。具体的な例として、ワンチップマイクロコンピュータに備わっている機能を使って、入出力兼用ポートの場合には、入力ポートに設定することや、Ｎ−ｃｈオープンドレインポートの場合には、内蔵プルアップ抵抗を遮断して、Ｈレベルを出力するなどの方法がある。
【００７７】
その後、メインＣＰＵ１０は、巻き上げモータ（モータＭ３　２６）をオンにしてフィルムの給送を開始する。そして、メインＣＰＵ１０がモータの回転に伴い出力されるＭＴＰＩ１２４をカウントしたところで、ＬＥＤＯＮ信号を出力し始める。サブＣＰＵ８１は、メインＣＰＵ１０から出力される所定パルス数（ここでは、２パルス）のＬＥＤＯＮ信号を検出すると、出力ポートに設定した後、写し込みのデータに従い、データを出力する。
【００７８】
図１７は、前述した図１６に示した写し込み部分を拡大したタイミングチャートである。図１８は、サブＣＰＵ８１の動作を説明するためのフローチャートである。尚、図１８に示すフローチャートのステップ符号については、前述した図１４で説明したステップと同じ処理等を行うものには、同じステップ符号を付してその詳細な説明は省略する。
【００７９】
まず、電源の供給によりサブＣＰＵ８１がイニシャライズされる（ステップＳ４１）。この処理において、ポートの設定、ＲＡＭの初期設定、１秒毎の割込み設定等が行われ、さらに、図１７に示すように、Ｐ００からＰ０６を入力ポートに設定しておき、ハイインピーダンスにする。
【００８０】
次に、通信要求の有無を判定を行い、通信要求に基づき通信処理を行い、メインＣＰＵからのコマンドを受信する（ステップＳ４２，Ｓ４３）。次に、受信したコマンドに従った処理に振り分け、それぞれの処理を行う（ステップＳ４５，Ｓ４６）。また、写し込み開始コマンドを受信した場合、ＬＥＤＯＮ信号の割込み回数をリセットして、割り込み分岐を許可する（ステップＳ４７，Ｓ４８）。
【００８１】
次に、ポートＰ００からＰ０６を入力ポートに設定することにより、ハイインピーダンス（Ｈｉ−Ｚ）に設定する（ステップＳ５６）。
【００８２】
以降は、写し込み準備完了フラグに１を設定し、１秒毎の割込み発生の有無を検出し、割込みが発生した場合には、１秒の計時を行い、年月日時分秒を更新して、キー入力による割込みの有無を検出して、その割り込みがあれば、キー入力に応じた処理を行う（ステップＳ５０〜Ｓ５４）。
【００８３】
次に図１９のフローチャートを参照して、「ＬＥＤＯＮ割り込み」について説明する。
まず、ＬＥＤＯＮ信号の立ち下がりを検出したら、割込み分岐する。そして、写込み準備完了か否かを判定する（ステップＳ７１）。この判定は、写し込み準備完了フラグの有無で判断する。例えば、フラグ１であれば、準備完了しているものと判断され、フラグ０であれば、後述するステップＳ７６へ移行する。そして、フラグ１であった場合（ＹＥＳ）、ＬＥＤＯＮ信号のカウント数をカウントする（ステップＳ７２）。これは、写し込むデータによって、列数が変化する為に、予め写し込むデータから列数を求める。
【００８４】
次に、前記カウント数と、所定の列数を比較し（ステップＳ７３）、カウント数が列数を超えていた場合（ＹＥＳ）、写込みが終了したことと判断され、写込み用ポートを入力ポート若しくはハイインピーダンスに設定する（ステップＳ７６）。その後、写込み準備完了を解除し割り込みの禁止処理を行う（ステップＳ８０）。具体的には「写込み準備完了フラグ」を０に設定し、割込み分岐からリターンして写込みを終了する。
【００８５】
また、前記ステップＳ７３の判定で、カウント数が列数以下であった場合には（ＮＯ）、カウント数が２以上か否かを判定する（ステップＳ７５）。この判定で、２以上ならば（ＹＥＳ）、次の列番号に写し込むデータをテーブルを参照し求めて（ステップＳ７７）、写込み用ポートにそのデータを出力して（ステップＳ７８）、割り込み処理へリターンする。一方、ステップＳ７５の判定で、２未満ならば（ＮＯ）、ポートＰ００からＰ０６を入力ポートにすることにより、ハイインピーダンスに設定する（ステップＳ７６）。
【００８６】
以上の実施形態について説明したが、本明細書には以下のような発明も含まれている。
【００８７】
（１）フィルムを給送しながら撮影情報を記録するカメラであって、
マスタとなるメインＣＰＵと、
前記メインＣＰＵよりも処理速度の遅いスレーブとなるサブＣＰＵと、
前記メインＣＰＵと、前記サブＣＰＵは、複数の信号線と制御信号からなる通信手段と、
前記サブＣＰＵから順次出力される列情報信号と、前記メインＣＰＵから出力されるタイミング信号により撮影情報を記録する記録手段と、
を具備し、
前記フィルムの給送に先立って、予め記録する撮影情報を前記メインＣＰＵから、前記サブＣＰＵに送信され、該フィルムの給送に伴い該メインＣＰＵから、第１の所定数の連続したパルス信号からなるタイミング信号が出力され、
前記サブＣＰＵは前記タイミング信号をカウントし、少なくとも１パルス以上の第２の所定カウント値になったところで、該カウント値の示す前記予めメインＣＰＵから受信した記録情報を列情報として順次出力する。
【００８８】
（２）前記第２の所定カウント値になるまでは、前記サブＣＰＵは列情報を“Ｌ”出力もしくは、Ｈｉ−ｚ状態にすることを特徴とする前記（１）項に記載のカメラ。
【００８９】
（３）前記第１の所定パルスは、撮影情報を構成するのに必要なパルス数と、第２のパルス数を加えた数以上であることを特徴とする前記（１）項に記載のカメラ。
【００９０】
（４）フィルムを給送に従い、略一列に並べられた複数の点光源を繰り返しオン・オフしながら、撮影情報を記録するカメラであって、
マスターとなるメインＣＰＵと、
前記メインＣＰＵよりも処理速度の遅いスレーブとなるサブＣＰＵと、
前記メインＣＰＵと前記サブＣＰＵに設けられ、複数の信号線と制御信号からなる通信手段と、
フィルムの給送に先立って、予め記録する情報を、メインＣＰＵからサブＣＰＵに送信され、前記フィルムの給送に伴いメインＣＰＵから、第１の所定数のパルス信号を出力し、前記サブＣＰＵは、上記パルス信号をカウントして、少なくとも１パルス以上の第２の所定カウント値になった時に、カウント値の示す前記予め受信した記録情報を出力開始することを特徴とするカメラ。
【００９１】
（５）フィルムを給送しながら撮影情報を記録するカメラであって、
マスターとなるメインＣＰＵと、
前記メインＣＰＵよりも処理速度の遅いスレーブとなるサブＣＰＵと、
前記メインＣＰＵと前記サブＣＰＵに設けられた、複数の信号線と制御信号からなる通信手段と、
前記サブＣＰＵに設けられ、前記フィルムの給送に先立って予め記録する撮影情報を前記メインＣＰＵから受け取り記憶するメモリと、
前記フィルムの給送に伴い、前記メインＣＰＵから前記第１の所定数のパルス信号を出力し、前記サブＣＰＵは該パルス信号をカウントし、少なくとも１パルス以上の第２の所定カウント値になったところで、該パルス信号に従い、前記メモリから前記撮影情報を順次出力ポートに出力することを特徴とするカメラ。
【００９２】
（６）前記撮影情報は、最初の文字又は数字の先頭に必ずすべての出力ポートがＬレベル若しくはハイインピーダンス状態の信号が付与されたデータであることを特徴とする前記（１）、（４）、（５）のいずれかに記載のカメラ。
【００９３】
【発明の効果】
以上詳述したように本発明によれば、カメラがユーザーの手に渡った後に、静電気下に置かれた場合や、通常の使用範囲を超えた過酷な条件で使用された場合に電気部品の劣化が発生しても、品位の高い情報記録を実現するカメラを提供することができる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態に係るカメラの外観を示す図である。
【図２】第１の実施形態に係るカメラの裏蓋を開けた状態を示す図である。
【図３】第１の実施形態に係る回路構成を示す図である。
【図４】第１の実施形態に係る本体側に設けた基板と、裏蓋側に設けた基板とを示す図である。
【図５】第１の実施形態に係る写込みを行う光学系を示す図である。
【図６】第１の実施形態に係るメインＣＰＵと、サブＣＰＵ８１を接続している通信の信号線を示す図である。
【図７】第１の実施形態に係る通信タイミングを説明するためのタイミングチャートである。
【図８】第１の実施形態に係るフィルム給送中に写込みを行う制御を説明するためのタイミングチャートである。
【図９】第１の実施形態に係るフィルムに正しく写し込こまれた情報とＬＥＤに障害が発生した時に写し込こまれた情報を示す図である。
【図１０】第１の実施形態に係る写し込み信号を示す図である。
【図１１】第１の実施形態に係るメインＣＰＵの処理動作を説明するためのフローチャートである。
【図１２】図１１に続きメインＣＰＵの処理動作を説明するためのフローチャートである。
【図１３】図１２に続きメインＣＰＵの処理動作を説明するためのフローチャートである。
【図１４】第１の実施形態に係るサブＣＰＵの処理動作を説明するためのフローチャートである。
【図１５】第１の実施形態に係るサブＣＰＵの割り込み処理動作を説明するためのフローチャートである。
【図１６】第２の実施形態に係るフィルム給送中に写込みを行う制御を説明するためのタイミングチャートである。
【図１７】第２の実施形態に係る写し込み信号を示す図である。
【図１８】第２の実施形態に係るサブＣＰＵの処理動作を説明するためのフローチャートである。
【図１９】第２の実施形態に係るサブＣＰＵの割り込み処理動作を説明するためのフローチャートである。
【図２０】写し込み用ＬＥＤの回路を示す図である。
【図２１】従来のフィルムに正しく写し込こまれた情報の例を示す図である。
【図２２】従来の写し込み信号を示す図である。
【図２３】従来のＬＥＤに障害が発生した時にフィルムに写し込こまれた情報の例を示す図である。
【符号の説明】
１…ストロボ部
２…表示部
３…イメージセレクト釦
４…レリーズ釦
５…メインＣＰＵ
６…撮影レンズ
１３…ＬＣＤ表示パネル
１５…ストロボユニット
８１…サブＣＰＵ
８７…電流制御用抵抗
９５…写し込み光学系[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for optically copying shooting information such as shooting date and time of a camera onto a film.
[0002]
[Prior art]
In general, most film cameras are equipped with a function of optically photographing a corner of a photographed frame when winding up the film after photographing so that information such as photographing date and time is written in a printed photograph.
[0003]
This information imprinting is performed by arranging a plurality of light emitting diodes (dot type LEDs) in a line in a direction perpendicular to the film feeding direction, and blinking in accordance with information to be written during film feeding, as shown in FIG. As shown in a), characters and numerals are formed by dots.
[0004]
Japanese Unexamined Patent Application Publication No. 2001-209109 proposed by the present applicant discloses a technique for imprinting data having small shape and dimensional errors on a film. This is to detect a motor pulse signal according to the rotation amount of the film feeding motor, and further count the number of motor pulse signals from the time when perforation is detected until the next perforation is detected. A lighting interval pulse for controlling the lighting interval of the LED is determined based on the count value. The correction time corresponding to the decimal part of the lighting interval pulse is calculated with reference to the cycle of the motor pulse signal, and based on the integer part of the lighting interval pulse and the correction time, the data is controlled while controlling the lighting interval of the LED. Is a technology for imprinting on a film.
[0005]
Also, when shooting with a dot type LED from the camera body side, it is necessary to turn on and off the LED corresponding to the high-sensitivity film, and a CPU with a relatively high processing speed is often used, and film feeding is performed. While detecting the position, the LED is directly driven to perform imprinting. In addition, when the film is fed while being fed, the positional relationship between the aperture portion for exposing the film and the LED is restricted by the moving direction of the film, and the layout cannot be freely adjusted. This cited document discloses an example in which a lens shutter camera is used to capture an image from the front side of a film.
[0006]
Also, Japanese Patent Application No. 2001-046648 proposed by the present applicant introduces a method of using a single-lens reflex camera and using a dot-type LED to capture an image from behind the film.
[0007]
[Problems to be solved by the invention]
In general, when the usage period of the camera is prolonged, deterioration of electric components, destruction by static electricity, deterioration of characteristics, and the like may occur, which may adversely affect the quality of imprinting by the data imprinting function. For example, in the driving circuit described in Japanese Patent Application No. 2001-046648, when the reverse current, which is one of the basic characteristics of the LED, increases, or the transistor between the cathode side of the LED and the ground is short-circuited. In such a case, the LED emits light at times other than the original imprint timing, and a linear locus may be imprinted on the photographed film.
[0008]
This problem will be described with reference to FIGS.
For example, when “98 12 12” as shown in FIG. 21 is considered as an example, the characters are the last characters “2”, “1”, “2”... In relation to the film feeding direction. Photographed from the opposite direction. Therefore, the dots constituting one character are also sequentially printed from the rear. Here, an example in which one LED (D1) among the dots (D0 to D6) of the LED 82a illustrated in FIG. 20 has a large reverse current due to deterioration will be described.
[0009]
From the port (P00) outputting the H level of the sub CPU 81 from the power supply Vcc, through the R1 in the current limiting resistor group 87, through the anode (AO) of the LED 82a (DO), and from the cathode, the reverse current is output. It flows into the cathode of the small LED 82a (D1). If D1 has deteriorated, the current flows from the anode (A1) through the resistor R2, and further through the port (P01) outputting the L level on the ground path. That is, a current path P00-R1-DO-D1-R2-P01-GND is formed.
[0010]
Similarly, even when a defect occurs in D4 and D5, a current flow path is formed and unnecessary light emission occurs. With the light emission, the light emission continues for a period represented by “period a” in the timing chart shown in FIG. As a result, as shown in FIG. 23, several tracks are exposed on the right side of the portion where the date of the photograph is imprinted.
In view of the above, the present invention provides a camera having an imprinting function for realizing high-quality information recording in which figures and characters can be distinguished even when electrical components for imprinting information relating to shooting on a film are deteriorated. The purpose is to:
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a camera that optically records photographing information on a film when the film is fed.In order to optically record the film on the film, a predetermined number of continuous pulse signals are used. A main control unit that outputs a timing signal that intersects the film feeding direction in order to imprint the photographing information including at least characters or numbers represented by a plurality of dots on the film onto the film. A recording unit having a plurality of light-emitting elements arranged in a direction, and a photographing operation which is slower in processing speed than the main control unit and which is recorded by a column information signal which outputs the timing signal and the photographing information in the arrangement direction. A sub-control unit that controls recording of the photographing information by causing any of the plurality of light-emitting elements to emit light in accordance with information, wherein the sub-control unit Prior to feeding the at front of the photographing information recorded in a period of at least one or more of said pulse signal, to provide a camera providing a signal which does not emit the light emitting element to the column information signals. In addition, the signal that does not cause the light emitting element to emit light causes the column information signal output from the sub control unit to be in an L level or a high impedance state.
[0012]
In the camera having the above configuration, when the film is fed and the photographing information is printed, a signal that does not drive the light emitting element of at least one pulse or more before the photographing information to be recorded is supplied before the film is fed. By setting, the light emitting element is not driven during the period from when the film is fed to when the shooting information is printed, so that the imprinting due to the malfunction of the circuit and the light emitting element has deteriorated. This prevents discrimination of numbers and characters.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating an external configuration of a camera according to the first embodiment of the present invention. FIG. 1A is a view of the camera viewed from a side, FIG. 1B is a top view of the camera viewed from above, and FIG. 1C is a view of the camera viewed from the front.
In the camera of this embodiment, a camera having a system capable of arbitrarily setting various photographing modes by a single-lens reflex system is taken as an example.
[0014]
In this camera configuration, the strobe unit 1 is provided with a strobe unit 15 (see FIG. 2) normally stored in the top of the main body, and pops up and emits light as necessary. The display unit 2 is composed of an LCD display panel 13 (see FIG. 2) and displays information about the camera. In particular, the display unit 2 has a layout similar to the shape of a mode setting image select button 3 to be described later. The character in the shooting mode is displayed.
[0015]
The image select button 3 is a mode setting switch group including a FKSW 46, a PRSW 47, a SASW 48, a YKSW 49, a FASW 50, and the like, which will be described later. These are respectively assigned to the respective photographing modes, and five kinds of photographing modes as the first mode with one touch, for example, “landscape mode”, “portrait mode”, “stop action mode”, “night scene mode” or One can be selected from “full auto mode”. Each of the SWs 46 to 50 shown in FIG. 3 switches from the first mode to the next second mode described later in response to the pressing operation.
[0016]
The release button 4 is a two-stage push-down type switch. A first release switch 1RSW40 for starting a shooting sequence and performing distance measurement and photometry, and a second release switch for performing exposure. And a switch 2RSW41. In addition, the finder observes the subject image formed by the photographing lens 6 by the single-lens reflex method, and at the same time, various photographing information is simultaneously displayed on the image forming surface and on the side thereof. It is possible to confirm information on various kinds of photographing without releasing.
[0017]
Next, FIG. 2 shows a state where the back cover 101 of the camera is opened. Inside the camera body 102, a cartridge chamber 103 for loading a film cartridge, a shutter mechanism 104, and a spool chamber 105 are provided. In this embodiment, the WPR 23 is disposed below and to the left of the shutter mechanism 104, and a zoom lever 106 and a finder 107 are disposed outside. A pressure plate 109 for pressing a film (not shown) against the surface of the rail 108 on the camera side is provided at the center on the back cover 101 side, and the printing window 110 is provided at the upper right of the pressure plate 109. Behind them, a substrate 91, a substrate 92 for connecting the projection optical system 95 to the substrate 91, and a substrate 90 for connecting the substrate 91 to the substrate 95 on the camera body side are arranged.
[0018]
Next, FIG. 3 shows a circuit configuration according to a first embodiment of the camera of the present invention.
[0019]
In this configuration, the main CPU 10 serving as a main control unit is a CPU having a pin number of, for example, 100 to 120 Pins, and sequentially executes a predetermined control program recorded in its built-in ROM to control various peripheral ICs. Is appropriately performed to comprehensively control the camera system.
[0020]
An oscillator (not shown) (10 MHz) is connected to the main CPU 10 so as to give the original vibration of the main CPU 10, and an AFIC 11 which is an IC for auto focus (AF); Is connected. In this embodiment, the “TTL phase difference detection method” is adopted as an example of the autofocus method, but the present invention is not limited to this.
[0021]
The main CPU 10 is connected to an LCD display panel 13, a date module 14, a strobe unit 15, and an interface IC 16, and various switch groups 40 to 52, 55 to 63 to be described later. And a piezoelectric buzzer (PCV) 65 that emits a confirmation sound when the switch is operated.
[0022]
A photographing sequence by the camera configured as described above will be described.
[0023]
First, the AFIC 11 is reset by receiving a reset signal (AFCEN) Sig1 from the main CPU 10. Next, when the subject image is formed on the photo sensor array arranged on the upper surface of the AFIC 11 through the photographing lens 6, processes such as light intensity integration and quantization are performed inside the AFIC 11, and the defocus amount is used as distance measurement information. Is calculated. Then, a signal (AFEND) Sig2 indicating that the light quantity integration processing has been completed is sent to the main CPU 10 together with the end of the light quantity integration.
[0024]
The distance measurement information is transferred to the main CPU 10 by a signal (AFCEN) Sig3 indicating that communication between the AFIC 11 and the main CPU 10 is performed, a data signal (DATA) Sig4, and a synchronization clock signal (CLK) Sig5. .
[0025]
However, if the characteristics of each element of the photosensor array vary, accurate distance measurement information cannot be obtained as it is. Therefore, predetermined variation information of the photosensor array is stored in the EEPROM 12 in advance, and the main CPU 10 corrects the distance measurement information obtained from the AFIC 11 with reference to the information. In the EEPROM 12, other adjustment values such as mechanical variations and variations in electrical characteristics of various elements are stored in advance.
[0026]
These adjustment values can be read by a signal (EPCEN) Sig7, a data signal (DATA) Sig8, and a synchronous clock signal (CLK) Sig9, which make the EEPROM 12 communicable, if necessary.
[0027]
Data transfer between the main CPU 10, the AFIC 11, the EEPROM 12, and the sub CPU 81 is performed by serial communication. The sub CPU 81 has a pin count of 64 to 80 Pin, is attached to the back cover 101, and is connected to the main CPU 10 provided on the camera body side by the serial signal line Sig1-9 and other control signal lines. ing.
[0028]
The signal lines between the main body 102 and the back cover 101 are connected by the connector 93 on the main board 89, the relay flexible board 89, and the connector 94 on the back cover 101 substrate 91. A clock oscillator (32 kHz) 83 and an oscillator (not shown) (4 MHz) are connected to the sub CPU 81.
[0029]
Further, an imprinting LED 82 for imprinting photographing information on the film as a recording section while feeding the film is connected to the sub CPU 81 as the sub-controller via a current control resistor 87. The imprinting LED 82 is composed of seven dot type LEDs, and is a cathode common type. An NPN transistor 88 is connected to those commons, and the transistor 88 is controlled by the main CPU 10 to turn on and off the dot LED 82. The dot-type LEDs 82 are composed of a plurality of light-emitting elements as point light sources, are arranged in a row, and their arrangement direction intersects, specifically, crosses the direction in which the film is fed. The sub CPU 81 is connected to a DMODSW 85 for setting a printing mode and a DSETSW 86 for setting data to be printed.
[0030]
Then, the interface IC 16 is activated by an interface IC activation signal (IFCENb) Sig11 from the main CPU 10. Parallel communication is performed using the main CPU 10, the latch signal (LATCH) Sig12, the 4-bit bus line signals (D0b to D3b) Sig13 to Sig6, and the D / Ab signal Sig17 to measure subject brightness and camera temperature. , Waveform shaping of output signals of photo interrupters, etc., constant voltage drive control of motor, generation of various constant voltages such as temperature stable voltage and temperature proportional voltage, check of remaining battery level, reception of infrared light remote control, motor Control of a driver, control of various LEDs, monitoring of a low voltage of a power supply voltage, control of a booster circuit, and the like are performed.
[0031]
In addition, a notice of strobe emission, a focus, and a brightness warning are notified to the photographer using the LED 20 in the viewfinder. The measurement of the subject brightness is performed using a photometric sensor 21 composed of a two-part silicon light emitting diode (SPD). The light-receiving surface of the photometric sensor 21 is divided into two parts, a central part of the screen and a peripheral part thereof. The light-receiving surface is divided into a spot light meter that measures light only at a part of the center of the screen and a multi-light meter that measures light using the entire screen. Two types of photometry can be selectively performed.
[0032]
Further, a motor driver IC 123 controlled by the main CPU 10 is connected to the interface IC 16. The motor driver IC 123 includes a motor (M1) 24 for focus adjustment, a motor (M2) 25 for zoom drive, and a motor (M3) 26 for mirror up / down, focal plane shutter charging and film feeding. Connected. In addition, the motor driver IC 123 is connected with an LED 27 for a self-timer and a magnet for holding the front curtain and the rear curtain of the focal plane shutter. The mechanism driven by the focus adjustment motor (M1) 24 and the zoom drive motor (M2) 25 includes an LDPI 32 for outputting a drive pulse, and a ZMPR 33 and a ZMPI 34 for outputting a zoom position and a movement amount. The output signal is sent to the main CPU 10. Further, the motor (M3) 26 is provided with an MTPI 24 for detecting a rotation amount, a clutch mechanism (not shown) for switching a drive target, and an SCPI 31 for identifying the target.
[0033]
Further, while the camera body is operating with the self-timer, the self-timer LED 27 emits light to notify the photographer who is away. In addition, the LCD display panel 13 displays the number of film frames, a shooting mode, a strobe mode, an aperture value, a remaining battery level, and the like based on a segment signal (SEG) Sig 34 and a common signal (COM) Sig 35 sent from the main CPU 10. . Further, in order to control the stop position of the film feeding and the like, a photo reflector WPR23 for detecting the perforation of the film is provided.
[0034]
Further, the strobe unit 15 functions as a composition assist light at the time of shooting or AF ranging, and outputs a strobe charging signal (STCHG) Sig 36, a strobe light emission start signal (STON) Sig 37 of the interface IC 16 output from the main CPU 10. The signal (STRG) for controlling the trigger circuit is controlled by each signal of Sig38. Further, the strobe charging voltage is sent to the main CPU 10 as a VST signal Sig39.
[0035]
The switches 40 to 52 detect key signals 0 to 5 (KEY0 to KEY5) Sig40 to Sig45 and key commons 0 to 2 (KEYCOM0 to 2) Sig46 to Sig48. From these signals, it is possible to determine how many of the switches 40 to 52 are on.
[0036]
A zoom-up switch (ZUSW) 42 and a zoom-down switch (ZDSW) 43 are switches for performing a zoom operation of a lens frame. When the ZUSW 42 is turned on, zooming is performed in the long focus direction, and when the ZDSW 43 is turned on, zooming is performed in the short focus direction. When the self-switch (SELFSW) 44 is turned on, the camera enters a self-timer shooting mode or a standby state of the remote controller. In this state, if the 2RSW 41 is turned on, self-timer shooting is performed, and if a shooting instruction operation is performed by a remote control transmitter (not shown), shooting by the remote control is performed.
[0037]
When the SPOTSW 45 is turned on, the SPOTSW 45 is in a spot metering mode in which metering is performed only by a part of the center of the shooting screen by the metering sensor 21. Normal photometry with the SPOTSW 45 turned off is a center-weighted average photometry mode performed using the entire photographing screen. A strobe switch (STSW) 5 is a switch for switching a strobe light emission mode. When the STSW 51 is operated, a normal automatic light emission mode (AUTO), a red-eye reduction automatic light emission mode (AUTO-S), and a forced light emission mode (AUTO-S) are set. The light emission mode (FILL-IN) and the strobe off mode are switched.
[0038]
The pop-up switch (PUPSW) 61 is a switch for controlling a strobe. The PUPSW 61 is linked to the movement of the strobe light-emitting unit, and is turned on when the light-emitting unit is raised to perform strobe charging. If the subject is low in brightness and the flash mode is set to By-Auto-By, the flash emission is permitted if the PUPSW 61 is on. The switch 63 is a switch (XSW63) for setting the timing of strobe light emission. The XSW 63 is turned on when the front curtain of the shutter runs and ends, and turned off when the shutter charge is completed.
[0039]
Next, FIG. 4 is a diagram for describing a configuration of a substrate provided on the camera body side and a substrate provided on the back cover side.
The main body substrate 89 is a substrate arranged on the camera main body, on which the main CPU 10, the interface IC 16, the motor driver 123, the LCD display panel 13, and the connector 93 are mounted, and each is connected by a wiring (not shown). On the other hand, a sub CPU 81 and a connector 94 are mounted on a back cover board 91 arranged on the back cover side, and the main board 89 and the back cover board 91 are connected to each other by a relay board 90 via connectors 93 and 94. You. As the relay substrate 90, a flexible substrate formed of a soft material so as to be freely bent at a hinge portion between the back cover and the camera body is used. The back cover board 91 and the imprinting LED 82 are connected by a relay board 92.
[0040]
Next, FIGS. 5A and 5B are diagrams for explaining the configuration of an optical system that imprints data on a shooting frame.
FIG. 5A is a diagram illustrating a positional relationship among the pressure plate 109, the projection window 110, and the projection optical system 95. FIG. 5B is a diagram illustrating the inside of the imprinting optical system 95. With such a configuration, the light emitted from the imprinting LED 82 is designed to pass through the lens, pass once through the mirror or prism, and focus on the film surface.
[0041]
FIG. 6 is a diagram for describing a connection relationship regarding communication between the main CPU 10 and the sub CPU 81.
The main CPU 10 and the sub CPU 81 include a signal line for controlling communication (a chip enable signal (CEN) 131, a communication ready signal) in addition to a serial communication signal line (a clock signal (CLK) 133, a data signal (DO, DI) 134). (READY) 132 and an LEDON signal 135 that also serves as a switching control of the imprinting LED and issues a request to switch the output of the sub CPU 81. The LEDON signal 135 includes the cathode of the imprinting LED 82 and the ground. An NPN-type transistor 88 for switching between the terminals is connected to the power supply (Vcc) 130 and a ground signal line in addition to the signal lines. 136 are connected.
[0042]
The output port of the sub CPU 81 is connected with a current control resistor 87 composed of a plurality of resistors for limiting the current flowing through the LED. Connected to the anode.
[0043]
FIG. 7 is a timing chart for explaining the communication timing of serial communication between the main CPU 10 and the sub CPU 81.
In this example, one communication data amount is set to 8 bits. The communication request is one-way from the main CPU 10 to the sub CPU 81. When required, the main CPU 10 outputs a communication request to the sub CPU 81, and upon receiving the request, outputs a communication clock from the main CPU 10 to perform communication.
[0044]
First, the main CPU 10 outputs the CEN signal 131 at H level, and after receiving the CEN signal 131 and completing the communication preparation, the sub CPU 81 outputs the READY signal 132 at H level. After receiving the READY signal 132, the main CPU 10 starts communication by putting data on the communication clock 133 and the data output signal 134. When the communication is completed, the output of the CEN signal 131 is changed to L level. After receiving the communication data, the sub CPU 81 sets the READY signal 132 to the L level, and the 8-bit communication is completed. Depending on the command, subsequent data exchange is performed in the same manner.
[0045]
Next, with reference to the timing chart shown in FIG. 8, timing control for performing imprinting during film feeding will be described. [A] a control signal of the hoist motor 24, [b] a WPR signal which is an output signal of the WPR 23 for detecting film perforation, and [c] an output signal of the MTPI 124 provided for detecting rotation of the motor. An MTPI signal, [d] an LEDON signal serving as a timing signal output from the main CPU 10, and [e] an LED control signal output from the sub CPU 81.
Further, the control signal of the winding motor 24 is turned on for convenience, and winding of the film is started. The hoist motor 24 is provided with a PI blade on the rotation shaft of the motor, and the rotation of the blade is detected by the photo interrupter MTPI 124. The main CPU 10 outputs the LEDON signal so that the WPR signal and the MTPI signal can be imprinted with good timing. The sub CPU 81 switches the output of the port by detecting the LEDON signal.
[0046]
Next, FIGS. 9A and 9B are diagrams for describing information imprinted on a film. FIG. 9A shows an information form imprinted in a normal state, and FIG. 8B shows an information form imprinted when the LED of the port 01 is broken or the characteristics are deteriorated. Is shown. Here, an example in which December 12, 1998, that is, “'98 12 12” is printed will be described.
[0047]
The data to be imprinted is imprinted from the end “2” of the numeral, based on the positional relationship between the imprinting LED 82 and the film to be fed. The ports of the sub CPU 81 are assigned to the LEDs of the imprinting LEDs 82 in order from the bottom, and the port P00 of the 0th bit, the port P01 of the 1st bit,... Has become. Then, for convenience, the column numbers are assigned to the 0th column, the 1st column,... In order from the right in FIG. The actual imprinting is performed sequentially from the second column after two dummy pulses are input as described later.
[0048]
In this embodiment, since the required number of dots for each character is known in advance, the required number of dots for all the characters to be printed before printing is known. The number of dots is also the number of pulses of the LEDON signal necessary for imprinting.
"2" is 5 dots, "1" is 3 dots, and the space between numbers is 2 dots between "1" and 1 dot between "1". And decide the space. It is determined in advance that there is 6 dots between the day data and the attached data and between the month and the year.
[0049]
In this case, 46 dots are required for the characters to be copied. In addition, the number of pulses for turning off the LED at the start of imprinting, which is the point of the present invention, is set to two. It can be seen that 46 pulses (predetermined number of pulses) are obtained by adding 46 pulses of the character to be imprinted and 2 pulses (predetermined count value) in which the LED is not turned on.
[0050]
Next, the imprinting operation at each port will be described with reference to the timing chart of FIG.
First, while the LEDON signal output from the main CPU 10 is at the H level, the transistor 88 is turned on, and among the ports of the sub CPU 81 to which the imprinting LED 82 is connected, the LED at the H level is turned on. The length of time of the H level of the LEDON signal (tLEDON) is determined based on the film sensitivity.
[0051]
Next, the main CPU 10 determines the MTPI signal from the number of pulses of the MTPR signal that indicates the rotation amount of the hoisting motor that is generated in one pulse of the WPR signal, and detects the perforation interval of the film during the film feeding. The movement amount of the film per one pulse is simply obtained, and the timing of outputting the LEDON signal corresponding to the MTPI signal is obtained.
[0052]
At this time, the number of pulses of the LEDON signal required for one imprint depends on the data to be imprinted. However, since the maximum number of pulses necessary for the imprint data is known in advance, only the number of pulses is targeted. Extra pulses are cut by the sub CPU 81.
[0053]
The LEDON signal and the output signal of the port of the sub CPU 81 are shown corresponding to the column numbers shown in FIG. For example, data output to the port P0 * is stored as table data inside the sub CPU 81 according to the data to be copied, and is obtained by referring to the table. Further, a port to be turned on is represented by 1 and a port to be turned off is represented by 0. In this example, in the counters 0 and 1, that is, the 0th line and the 1st line, the L level, that is, the LED is not turned on, and the LEDs of the first ports P00, P04, and P05 are turned on after the LEDON signal tLEDON2. In particular, in the present embodiment, after two pulses, which are the dummy pulses of the LEDON signal, are input, they are output to the port P0 * from the second column. In other words, the first two pulses serving as the dummy are controlled so that the LEDON signal becomes L level. With this L level, since the LED does not emit light, it is possible to prevent imprinting due to unnecessary light emission before data input.
[0054]
Next, the processing operation of the main CPU 10 will be described with reference to a series of flowcharts shown in FIGS.
First, the processing operation in the main CPU 10 of the camera body will be described. First, power is supplied by loading a battery or turning on a power switch, and the main CPU 10 is initialized (step S1). At this time, the RAM and the port are initialized, and necessary data is read from the EEPROM 12 and expanded.
[0055]
Next, it is determined whether or not the power switch provided on the camera has been operated (step S2). If the power switch has been operated, it is determined whether or not the power switch (PWSW 55) has been turned on (step S3). In this determination, when the power switch is turned on (YES), the photographing lens is extended from the retracted position to the photographable position (step S4). On the other hand, if the PWSW 55 has not been turned on (NO), the photographing lens is retracted into the retracted state (step S5).
[0056]
In step S2, if the PWSW 55 has not been operated (NO), or if the photographing lens has been advanced to a state in which photographing can be performed in step S4, or if collapsing has been completed in step S5, winding is performed. It is determined whether the return switch has been operated (step S6).
[0057]
If the rewind switch is turned on (YES), the film is rewound (step S7). When the rewinding is completed or the rewinding switch is not operated and is not turned on (NO), the open / close state of the back cover 101 is determined based on whether or not the back cover SW (BKSW 57) is operated ( Step S8). The state where the back cover SW is operated and the back cover is opened is set to the ON state, and the state where the back cover is closed is set to the OFF state. If it is determined in step S8 that the operation has been performed (YES), it is determined whether or not the back cover SW has been turned off (step S9). If the BKSW 57 is turned off (from ON to OFF) in the determination in step S9 (YES), it is determined that the opened back cover 101 is closed, and the film is pulled out from the loaded film cartridge and put on the spool. The idle feeding for winding is performed (step S10), and the completion of the film loading is recognized based on the success of the idle feeding (step S11). However, if the BKSW 57 is turned on (from OFF to ON) in step S9 (NO), it is recognized that the closed back cover 101 has been opened (step S12).
[0058]
If the BKSW 57 has not been operated in step S8, that is, if the back cover 101 has not been opened / closed (NO), or if the recognition in steps S11 and S12 has been completed, the power supply (PWSW 55) is ON. It is determined whether or not it is (Step S13). If it is not ON (NO), the process returns to Step S2. However, if the PWSW 55 is ON (YES), the information is displayed on the LCD display panel 13 of the camera body (step S14), for example, to detect the state of the zoom SW, the shooting mode selection button and the like, and to perform the processing. It performs (step S15), and determines whether or not the release button is pressed and the 1RSW 40 is turned on (step S16).
[0059]
If it is determined that the 1RSW 40 is not ON (NO), the process returns to the step S2. However, if the 1RSW 40 is turned on, photometry is performed (step S17), the film sensitivity written on the film cartridge is detected (step S18), and exposure calculation for determining the shutter speed and the like is performed (step S19).
[0060]
Thereafter, the AF sensor is integrated, and the amount of defocus is calculated to obtain a lens drive amount for focusing (steps S20 and S22). The focusing lens is driven based on the obtained lens driving amount (step S23), and after the driving is completed, it is determined whether or not the focusing by the focusing lens is within a predetermined range (step S24). If it is out of the range (NO), the process returns to step S17, and the light measurement is started again. However, if it is within the range (YES), a symbol or the like indicating that the image is focused on the LCD display panel 13 or the viewfinder is displayed (step S25).
[0061]
Then, it is determined whether or not the 1RSW 40 is in the ON state (step S26). If the 1RSW 40 has been turned off (NO), the process returns to the step S2. However, if 1RSW 40 is ON (YES), it is detected whether 2RSW 41 is ON (step S27). If the 2RSW 41 has not been turned on (NO), the process returns to step S26 to wait. If the 2RSW 41 has been turned on (YES), the process proceeds to the next step S28.
[0062]
Exposure is performed in step S28, and it is determined whether or not film loading is completed (step S29). If the loading has been completed (YES), the sub CPU 81 is notified of the start of printing. This involves transferring the imprint data as shown in Table 1 and communicating a code indicating the start of imprinting to prepare the sub CPU 81 for imprinting (step S30) while feeding the film. While outputting the LEDON signal, "wind one frame of film" is performed (step S31). After the completion of the winding, or if the loading of the film is not completed in the step S29 (NO), the winding of the film is not necessary, and the process returns to the step S2.
[0063]
[Table 1]

[0064]
Here, it is assumed that 0 indicates the L level and 1 indicates the H level.
Table 1 shows data that has been transmitted by communication from the main CPU to the sub CPU in advance. This data indicates the state of the table stored in the memory of the sub CPU, and outputs the data of column number "0" to the ports P00 to P06, similar to "communication reception for starting printing". When the intention is detected, the fall of the LEDON signal is detected, the address for referring to the memory is updated, and the data is output to the port of the sub CPU. This processing is performed using an interrupt because the execution speed of the CPU is low.
[0065]
Next, the processing operation of the sub CPU 81 will be described with reference to the flowcharts of FIGS.
[0066]
First, the sub CPU 81 is initialized by power supply (step S41). In this processing, port setting, RAM initial setting, interrupt setting every second, and the like are performed. Next, it is determined whether there is a communication request (step S42). If there is a communication request in this determination (YES), since the interrupt flag 1 is set at the rise of the communication request (CEN) signal, if the communication request flag is set, communication processing is performed, and the communication from the main CPU is performed. A command is received (step S43). On the other hand, if there is no communication request (NO), the process proceeds to step S51 described later.
[0067]
Next, the process is distributed to a process according to the received command (step S44). Although there are many processes corresponding to commands, detailed description is omitted, and representatively, low-current-consumption mode processing, RAM data read / write processing, and interrupt count reset processing will be described as examples. For example, a transition process to the low current consumption mode is performed (step S45). In this case, when a preset interrupt occurs, after the processing is performed, the mode again becomes the low current consumption mode. Further, a read / write process of the RAM data is performed (step S46). If communication is required following the command, communication is continued.
[0068]
When the imprint start command is received, the counter that counts the number of interruptions of the LEDON signal that occurs subsequently is reset to "0" (step S47), and the interruption branch is permitted (step S48). In addition, each time the DMODSW 85 is turned on, the imprint mode is set to “not imprint” → “year / month / day” → “month / year / year” → “day / month / year” → “date / time / minute” → “not imprint” It switches in order.
[0069]
Next, a signal in the 0th column of data necessary for imprinting is output to the port (step S49). (Step S49). For example, the data in the 0th column (A) in FIG. 10 is 0, 0, 0, 0, 0, 0, 0 in order from P06, and the same applies to the data in the first column. Actual data for turning on the LED is from the second column.
[0070]
Then, 1 is set to the imprint preparation completion flag (step S50). Next, it is detected whether or not a one-second interrupt has occurred (step S51). If an interrupt has occurred (YES), a one second clock is performed, and calendar processing for updating the date, month, day, hour, minute, and second is performed (step S52). After the end of the calendar process, or if no interrupt has occurred in step S51 (NO), it is detected whether or not there has been an interrupt due to key input (step S53).
[0071]
If there is an interrupt at step S53 (YES), a process corresponding to the key input is performed (step S54). When the DMODSW is pressed at short time intervals, the printing mode is changed, and when the DMODSW is pressed for more than 2 seconds, the time data is corrected. In the time data correction process, every time DSETSW is pressed, the data is updated, and each time DMODSW is pressed, "year" → "month" → "day" → "hour" → "minute" → "correction end"; Update the location of the data to be modified. After the process corresponding to the key input is completed, or when there is no interruption in step S53 (NO), the process returns to step S42.
[0072]
Next, the interrupt branch processing of the sub CPU 81 will be described with reference to the flowchart shown in FIG.
When the falling edge of the LEDON signal is detected, an interruption branch occurs.
First, it is determined whether or not the preparation for imprinting is completed (step S61). This determination is made based on the presence or absence of the imprint preparation completion flag. For example, if the flag is 1, it is determined that the preparation is completed. If the flag is 0, the process proceeds to step S66 described later.
[0073]
If the flag is 1 (YES), the count number of the LEDON signal is counted (step S62). Since the number of columns changes depending on the data to be copied, the number of columns is obtained in advance from the data to be copied. Next, the count number is compared with a predetermined number of columns (step S63). If the count number exceeds the number of columns (YES), it is determined that the printing has been completed, and the printing port is set to L. The level is set (step S66), the completion of the preparation for imprinting is released, and interrupt prohibition processing is performed (step S67). Specifically, the “imprint preparation completion flag” is reset to 0. Then, the process returns from the interrupt branch and ends the imprinting.
[0074]
If it is determined in step S63 that the count number is equal to or less than the number of columns (NO), the data to be copied to the next column number is obtained by referring to the table (step S64), and the data for the port for printing The data is output (step S65), and the process returns to the interrupt processing. For example, the data in the second column in FIG. 10 is 1,0,0,0,1,1,0 in order from P00 to P06.
[0075]
Next, a second embodiment will be described with reference to FIGS.
In the above-described first embodiment, the L level is output to the port during the period in which no imprinting is performed. However, the second embodiment is different from the first embodiment in that the port is set to a high impedance (Hi-z) state. I have.
[0076]
The imprint timing will be described with reference to the timing chart shown in FIG.
When the sub CPU 81 receives the “imprint start communication” command, the sub CPU 81 sets the levels of P00 to P06 to high impedance (Hi-z). As a specific example, using the function provided in the one-chip microcomputer, it can be set as an input port in the case of an I / O port or a built-in pull-up in the case of an N-ch open drain port. There is a method of outputting an H level by cutting off the resistance.
[0077]
Thereafter, the main CPU 10 turns on the winding motor (motor M326) and starts feeding the film. Then, when the main CPU 10 counts the MTPI 124 output with the rotation of the motor, it starts outputting the LEDON signal. When detecting a predetermined number of pulses (here, two pulses) of the LEDON signal output from the main CPU 10, the sub CPU 81 sets the output port, and then outputs the data in accordance with the imprint data.
[0078]
FIG. 17 is an enlarged timing chart of the imprint portion shown in FIG. 16 described above. FIG. 18 is a flowchart illustrating the operation of sub CPU 81. Note that, for the step codes in the flowchart shown in FIG. 18, those that perform the same processing as the steps described in FIG. 14 described above are given the same step signs, and detailed descriptions thereof are omitted.
[0079]
First, the sub CPU 81 is initialized by power supply (step S41). In this process, port setting, RAM initial setting, interrupt setting every second, and the like are performed. Further, as shown in FIG. 17, P00 to P06 are set as input ports, and high impedance is set.
[0080]
Next, it is determined whether there is a communication request, a communication process is performed based on the communication request, and a command from the main CPU is received (steps S42 and S43). Next, the processing is distributed to processing according to the received command, and each processing is performed (steps S45 and S46). Further, when the imprint start command is received, the number of interrupts of the LEDON signal is reset to permit the interrupt branch (steps S47 and S48).
[0081]
Next, by setting the ports P00 to P06 as input ports, high impedance (Hi-Z) is set (step S56).
[0082]
Thereafter, 1 is set to the imprint preparation completion flag, the presence or absence of an interrupt occurrence every 1 second is detected, and when an interrupt occurs, the time of 1 second is measured, and the date, month, day, hour, minute, and second are updated. Then, the presence or absence of the interruption by the key input is detected, and if there is the interruption, the processing according to the key input is performed (steps S50 to S54).
[0083]
Next, the “LEDON interrupt” will be described with reference to the flowchart in FIG.
First, when the falling of the LEDON signal is detected, the process branches to an interrupt. Then, it is determined whether or not the preparation for imprinting is completed (step S71). This determination is made based on the presence or absence of the imprint preparation completion flag. For example, if the flag is 1, it is determined that the preparation is completed. If the flag is 0, the process proceeds to step S76 described later. If the flag is 1 (YES), the count number of the LEDON signal is counted (step S72). Since the number of columns changes depending on the data to be copied, the number of columns is obtained in advance from the data to be copied.
[0084]
Next, the counted number is compared with a predetermined number of columns (step S73). If the counted number exceeds the number of columns (YES), it is determined that the imprinting has been completed, and the imprinting port is input. The port or high impedance is set (step S76). Thereafter, the completion of the preparation for imprinting is released, and interrupt prohibition processing is performed (step S80). Specifically, the “imprint preparation completion flag” is set to 0, and the process returns from the interrupt branch to end the imprint.
[0085]
If it is determined in step S73 that the count number is equal to or less than the column number (NO), it is determined whether the count number is equal to or greater than 2 (step S75). If the determination is 2 or more (YES), the data to be copied to the next column number is obtained by referring to the table (step S77), and the data is output to the port for printing (step S78), and the interrupt processing is performed. Return to On the other hand, if it is determined in step S75 that the value is less than 2 (NO), the ports P00 to P06 are set as the input ports to set them to high impedance (step S76).
[0086]
Although the above embodiments have been described, the present specification also includes the following inventions.
[0087]
(1) A camera for recording shooting information while feeding a film,
A main CPU serving as a master,
A sub CPU serving as a slave having a lower processing speed than the main CPU;
The main CPU and the sub CPU each include a communication unit including a plurality of signal lines and control signals;
A column information signal sequentially output from the sub CPU, and recording means for recording shooting information based on a timing signal output from the main CPU;
With
Prior to the feeding of the film, shooting information to be recorded in advance is transmitted from the main CPU to the sub CPU, and the main CPU sends a first predetermined number of continuous pulse signals from the main CPU along with the feeding of the film. Output a timing signal
The sub-CPU counts the timing signal, and when the count reaches a second predetermined count value of at least one pulse or more, sequentially outputs record information indicated by the count value and received in advance from the main CPU as column information.
[0088]
(2) The camera according to (1), wherein the sub CPU outputs column information to “L” or sets the column information to a Hi-z state until the second predetermined count value is reached.
[0089]
(3) The camera according to the above (1), wherein the first predetermined pulse is equal to or more than the number obtained by adding the number of pulses required to compose photographing information and the second number of pulses. .
[0090]
(4) A camera which records shooting information while repeatedly turning on and off a plurality of point light sources arranged substantially in a line in accordance with feeding of a film,
A main CPU serving as a master,
A sub CPU serving as a slave having a lower processing speed than the main CPU;
Communication means provided in the main CPU and the sub CPU, the communication means comprising a plurality of signal lines and control signals;
Prior to the feeding of the film, information to be recorded in advance is transmitted from the main CPU to the sub CPU, and a first predetermined number of pulse signals are output from the main CPU along with the feeding of the film. A camera that counts the pulse signal and starts outputting the previously received recording information indicated by the count value when the count reaches a second predetermined count value of at least one pulse.
[0091]
(5) A camera for recording shooting information while feeding a film,
A main CPU serving as a master,
A sub CPU serving as a slave having a lower processing speed than the main CPU;
Communication means comprising a plurality of signal lines and control signals provided in the main CPU and the sub CPU;
A memory that is provided in the sub CPU and receives and stores, from the main CPU, shooting information that is recorded in advance before the film is fed;
Along with the feeding of the film, the first predetermined number of pulse signals are output from the main CPU, and the sub CPU counts the pulse signals, and has reached a second predetermined count value of at least one pulse or more. By the way, the camera sequentially outputs the photographing information from the memory to an output port according to the pulse signal.
[0092]
(6) The above-mentioned (1), (4), wherein the photographing information is data in which a signal of an L level or a high impedance state is always added to all output ports at the beginning of the first character or number. , (5).
[0093]
【The invention's effect】
As described above in detail, according to the present invention, after the camera reaches the user's hand, the camera is placed under static electricity, or when used under severe conditions beyond the normal use range, the electric components are removed. Even if deterioration occurs, it is possible to provide a camera that realizes high-quality information recording.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an appearance of a camera according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating a state in which a back cover of the camera according to the first embodiment is opened.
FIG. 3 is a diagram illustrating a circuit configuration according to the first embodiment.
FIG. 4 is a diagram illustrating a substrate provided on a main body side and a substrate provided on a back cover side according to the first embodiment.
FIG. 5 is a diagram illustrating an optical system that performs imprinting according to the first embodiment.
FIG. 6 is a diagram illustrating communication signal lines connecting the main CPU and the sub CPU 81 according to the first embodiment.
FIG. 7 is a timing chart for explaining communication timing according to the first embodiment.
FIG. 8 is a timing chart for explaining control for performing imprinting during film feeding according to the first embodiment.
FIG. 9 is a diagram illustrating information correctly imprinted on a film according to the first embodiment and information imprinted when a failure occurs in an LED.
FIG. 10 is a diagram illustrating an imprint signal according to the first embodiment.
FIG. 11 is a flowchart illustrating a processing operation of a main CPU according to the first embodiment.
FIG. 12 is a flowchart for explaining the processing operation of the main CPU following FIG. 11;
FIG. 13 is a flowchart illustrating the processing operation of the main CPU subsequent to FIG. 12;
FIG. 14 is a flowchart illustrating a processing operation of a sub CPU according to the first embodiment.
FIG. 15 is a flowchart illustrating an interrupt processing operation of the sub CPU according to the first embodiment.
FIG. 16 is a timing chart for explaining control for performing imprinting during film feeding according to the second embodiment.
FIG. 17 is a diagram illustrating an imprint signal according to the second embodiment.
FIG. 18 is a flowchart illustrating a processing operation of a sub CPU according to the second embodiment.
FIG. 19 is a flowchart illustrating an interrupt processing operation of a sub CPU according to the second embodiment.
FIG. 20 is a diagram showing a circuit of an imprinting LED.
FIG. 21 is a diagram showing an example of information correctly imprinted on a conventional film.
FIG. 22 is a diagram showing a conventional imprint signal.
FIG. 23 is a diagram showing an example of information imprinted on a film when a failure occurs in a conventional LED.
[Explanation of symbols]
1. Strobe unit
2 Display unit
3. Image select button
4: Release button
5 ... Main CPU
6 ... photographic lens
13 LCD display panel
15 ... Strobe unit
81 ... Sub CPU
87 ... Current control resistor
95: Imprinting optical system

Claims (3)

In a camera that optically records shooting information on the film when feeding the film,
For optical recording on the film, a main control unit that outputs a timing signal consisting of a predetermined number of continuous pulse signals,
In order to imprint the photographing information including at least characters or numbers represented by a plurality of dots on the film on the film, the film includes a plurality of light emitting elements arranged in a direction intersecting with a feeding direction of the film. A recording unit;
The processing speed is slower than the main control unit, the timing signal and the column information signal to output the imaging information divided in the array direction, according to the imaging information to be recorded, to emit any one of the plurality of light emitting elements, A sub-control unit that controls recording of shooting information;
The sub-control unit, prior to the feeding of the film, before the shooting information to be recorded, during a period including at least one or more of the pulse signal, the signal that does not cause the light emitting element to emit light, A camera provided in a column information signal. The signal that does not cause the light emitting element to emit light is
2. The camera according to claim 1, wherein the column information signal output from the sub control unit is set to an L level or a high impedance state. In a camera that blinks a plurality of point light sources arranged substantially in a line when feeding a film, and optically records shooting information represented by a plurality of dots on the film,
For optical recording on the film, a main control unit that outputs a timing signal consisting of a predetermined number of continuous pulse signals,
Processing speed is slower than the main control unit, according to the timing signal, a sub-control unit that controls the recording of the imaging information,
With
Prior to the feeding of the film, the shooting information to be recorded in advance is transmitted from the main control unit to the sub-control unit, and along with the feeding of the film, a predetermined number of pulse signals are transmitted from the main control unit. Output, the sub-control unit counts the pulse signal, and outputs the recording information received from the main control unit when at least the pulse signal has a count value of one or more pulses. Camera.

Images