JPH05328210A - Led lighting device for television camera - Google Patents

Led lighting device for television camera

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Publication number
JPH05328210A
JPH05328210A JP15302792A JP15302792A JPH05328210A JP H05328210 A JPH05328210 A JP H05328210A JP 15302792 A JP15302792 A JP 15302792A JP 15302792 A JP15302792 A JP 15302792A JP H05328210 A JPH05328210 A JP H05328210A
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JP
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Patent type
Prior art keywords
led
circuit
lighting
television camera
timing
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
JP15302792A
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Japanese (ja)
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JP2994139B2 (en )
Inventor
Junichi Hozumi
Etsuo Iida
Tomofumi Nakayama
Shinichi Sumimoto
智文 中山
信一 住本
順一 穂積
悦男 飯田
Original Assignee
Koito Ind Ltd
小糸工業株式会社
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Abstract

PURPOSE: To obtain the video image of a moving picture similar to that under lighting using an electric bulb by pulsating an LED synchronously with the shutter operation of a television camera.
CONSTITUTION: The LED lighting device 14 is made up of a field selection circuit 2 switching a field with a lighting synchronization mode selector switch 4, a counter circuit 6 frequency-dividing the frequency according to a shutter time set from a setting switch 7, an automatic tracking circuit 8 automatically setting a lighting timing of the LED 10 and a lighting time traces by the drive timing from the counter circuit 6, an AND gate circuit 5 operating a field signal from a field selection circuit 2 and the lighting signal from the automatic tracking circuit 8 and outputting the operated signal to a drive circuit 9 of the LED 10. Then the LED 10 is driven relatively in the shutter operating timing of the television camera 1 and the image pickup is executed by lighting the object 13.
COPYRIGHT: (C)1993,JPO&Japio

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、テレビカメラを利用した動画像の撮影システムにおいて、室内や夜間の撮影を行う際に使用するテレビカメラ用LED照明装置に関するものである。 The present invention relates, in the imaging system of the moving image using a television camera, to an LED lighting device for a television camera for use in making indoor or night shooting.

【0002】 [0002]

【従来の技術】従来より、テレビカメラによる室内や夜間の映像を撮影するための照明装置としては、連続点灯する電球或はテレビカメラのシャッター動作と連動発光させるストロボを光源として使用していたが、前者は寿命が短く消費電力が大きい等の欠点を有しており、後者もまた寿命が短く、高速の繰り返し発光において、各発光毎の1回の光量が不均一であり、光量調整が困難である等の欠点を有していた。 Conventionally, as a lighting device for taking indoor or nighttime image by the television camera, but the bulb or stroboscope for interlocking emitting a shutter operation of the television camera continuous lighting it was used as the light source the former has a disadvantage of such life consumption power short greater, the latter also short lifetime, in high-speed repeated emission, one of the light amount of each light emitting each is heterogeneous, difficult to light quantity adjustment etc. had the disadvantage of it.

【0003】そして、テレビカメラ等のシャッターカメラを使用して動画像を撮影する場合は、シャッタータイミングとストロボ発光のタイミングを一致させる必要がある。 [0003] Then, when photographing a moving image by using shutter camera such as a television camera, it is necessary to match the timing of the shutter timing and strobe lighting. しかし、現在使用されている各種ストロボの発光原理からして、微妙なタイミングが取り難いため、一般にはシャッター時間を長くしてストロボ発光時間がその開放時間に入るようにしている。 However, with the principle of light emission of various strobe that is currently being used, since it is difficult to take subtle timing, typically so that flash light emission time by increasing the shutter time it enters its open time. そのため、この方法では、露光時間がストロボの発光時間となり、高速の移動物体を撮影する場合、サンプリング間隔が安定せず、また露光量も安定しないという欠点があった。 Therefore, in this method, the exposure time becomes a light emission time of the flash, when photographing fast moving objects, the sampling interval is not stable, also exposure amount was a disadvantage that stable.

【0004】 [0004]

【発明が解決しようとする課題】本発明は、上記問題に鑑みて創案されたものであり、 (1)電球を用いた連続した照明と同様な動画像の映像を得る。 The present invention 0005] has been developed in view of the above problems, obtain an image of the illumination similar to moving image continuous with (1) bulbs. (2)露光量(露光時間)を安定化する。 (2) stabilizing the exposure amount (exposure time). (3)LED発光タイミングを安定化する。 (3) stabilizing the LED emission timing. (4)シャッター時間を変更した時に生じるシャッタータイミングのずれとLED発光時間の変動に対して自動的に追従し、常時最適な発光条件を維持する。 (4) automatically follow the variations in displacement and LED emission time of shutter timing that occurs when changing the shutter time, to maintain a constant optimum emission conditions. (5)フィールド毎にLEDを発光させることにより、 (5) by emission of the LED for each field,
等価的に2倍の光量を得る。 Equivalently obtain two times the intensity. (LEDの発光電流を2倍にできる。) (6)LED光源を使用し、光量調整を簡単化(発光電流の調整)する。 (The light emission current of the LED can be doubled.) (6) using the LED light source, to simplify the light amount adjustment (adjustment of the light emission current). (7)LED光源を使用し、省電力化を図る。 (7) using the LED light source, power saving. (8)LED光源を使用し、装置の長寿命化を図る。 (8) using the LED light source, increase the life of the device. ことができるテレビカメラ用LED照明装置を提供することを目的とするものである。 It it is an object to provide an LED lighting device for a television camera that can.

【0005】 [0005]

【課題を解決するための手段】上記目的を達成するために、本発明に係るテレビカメラ用LED照明装置は、テレビカメラのシャッター動作と同期してLEDをパルス発光することを要旨とするものである。 To achieve the above object, according to the Invention The, LED lighting device for a television camera according to the present invention has been made to subject matter that pulse emission of the LED in synchronism with the shutter operation of the television camera is there. 即ち、本発明に係るテレビカメラ用LED照明装置は、映像信号の奇数フィールドと偶数フィールドに対して、どちらか片方のフィールド、或は両フィールドに同期してLEDをパルス発光するようにしたものである。 That, LED lighting device for a television camera according to the present invention is obtained by for odd and even fields of the video signal, either one of the fields, or the LED in synchronization with both fields so that pulse emission is there.

【0006】 [0006]

【作用】上記構成によれば、テレビカメラの片方のフィールド毎にパルス発光させることにより、発光電流を2 According to the above configuration, by pulse emission for each one of the fields of the television camera, the emission current 2
倍にすることができるから、両フィールドで発光させる方式に比べて2倍の光量が得られる。 Since it is possible to double, double light intensity compared with a method to emit light in both fields is obtained. また、パルス発光のタイミングを映像信号の中の水平同期信号をカウントしてシャッタータイミングと同期するようにしてあるから、安定なタイミングでシャッター撮影をすることができる。 Further, since the timing of the pulse emission by counting the horizontal synchronizing signal in the video signal are to be synchronized with shutter timing, it is possible to make the shutter photographing a stable timing.

【0007】上記シャッター時間を変更した時、それに合わせてLEDの発光タイミングと発光時間を自動的に追従させるようにした。 [0007] and so when changing the shutter time, to automatically follow the LED light emitting timing and the light emission time accordingly. そして、シャッター時間に比べてパルス発光時間を長く取るようにして、シャッター優先の露光方式としてあるため、安定な露光時間で撮影をすることができる。 Then, to take long pulse light emission time than the shutter time, because of the exposure method of the shutter priority, it can be captured in a stable exposure time.

【0008】 [0008]

【実施例】以下、本発明に係るテレビカメラ用LED照明装置の一実施例を図面に従って説明する。 EXAMPLES Hereinafter, a description will be given of an embodiment of a television camera LED lighting device according to the present invention with reference to the accompanying drawings. 図1はLE 1 LE
D照明装置をCCDカメラと組み合わせた状態のブロック図であり、図2の信号タイミングチャートを参照しながら説明する。 The D lighting device is a block diagram of a combined state with the CCD camera will be described with reference to the signal timing chart of FIG.

【0009】テレビカメラ1は、一般にはCCD方式のカメラが使用されることが多く、その中でフレームトランスファ方式のCCDカメラの場合を一例として説明する。 [0009] Television camera 1 generally that camera CCD type is used often, the case of the CCD camera frame transfer method in which as an example. 図1の本実施例の説明では、該部同期信号を使用した場合のものを示しており、画像処理装置11からの垂直同期信号VDと水平同期信号HDによってテレビカメラ1が映像動作を行い、画像処理装置11に映像信号S In the description of this embodiment 1, it shows those when using the portion sync signal, the television camera 1 by the vertical synchronizing signal VD and horizontal synchronizing signal HD from the image processing apparatus 11 performs an image operation, video signal S to the image processing apparatus 11
を出力する。 To output.

【0010】本発明のLED照明装置14は、発光同期モード選択スイッチ4によってフィールドの切替を行うフィールド選択回路2と、設定スイッチ7から設定したシャッター時間に従って分周するカウンタ回路6と、該カウンタ回路6からの駆動タイミングに追従させてLE [0010] LED lighting device 14 of the present invention includes a field selection circuit 2 for switching fields by emitting the synchronization mode selector switch 4, the counter circuit 6 for dividing according shutter time set from the setting switch 7, the counter circuit to follow the drive timing from 6 LE
D10の発光タイミングと発光時間を自動的に設定する自動追従回路8と、LED10の駆動回路9に上記フィールド選択回路2からのフィールド信号と自動追従回路8からの発光信号を演算して出力するANDゲート回路5とから構成してある。 An automatic follow-up circuit 8 automatically sets the light emission timing and the light emission time of the D10, the AND outputs by calculating the emission signal from the field signal and the automatic follow-up circuit 8 from said field selection circuit 2 to the driving circuit 9 LED10 It is composed of a gate circuit 5. そして、LED10をテレビカメラ1のシャッター動作タイミングと相対発光駆動して被写体13を照明し、撮影を実施するものである。 Then, to illuminate the object 13 and the shutter operation timing and relative light emission driving of the television camera 1 LED 10, is intended to carry out imaging.

【0011】上記フィールド選択回路2は、画像処理装置11からの奇数と偶数のフィールドを選択する機能を有し、設定スイッチ3からどちらのフィールドに同期してLED10を発光させるかを設定するようになり、発光同期モード選択スイッチ4は、「全フィールドで発光させる」か、又は「片方のフィールドで発光させる」かを選択する。 [0011] The field selection circuit 2 has a function of selecting the odd and even fields from the image processing apparatus 11, to set whether to emit LED10 in synchronism with either the field from the setting switch 3 becomes, emission synchronization mode selection switch 4 selects either "full field emitted thereby in" or "emit light at one of the field".

【0012】図2(e)は、全フィールド発光同期モードであり、ANDゲート回路5の入力端子に発光可能な状態とするためのレベル信号を入力し、図2(b)の垂直同期信号VDの全てに同期して発光する。 [0012] FIG. 2 (e) is the total field emission synchronous mode, inputs a level signal for a light emitting ready to input terminals of the AND gate circuit 5, a vertical synchronizing signal VD shown in FIG. 2 (b) in synchronization with the light emission in all.

【0013】図2(f)は、片フィールド発光同期モードであり、ANDゲート回路5の入力端子に図2(b) [0013] FIG. 2 (f) is a single field emission synchronous mode, FIG. 2 to the input terminal of the AND gate circuit 5 (b)
の垂直同期信号VDの奇数フィールドのみ発光可能な状態とする図2(c)のフィールド信号が入力し、奇数フィールド時にのみ同期して発光する。 Field signal is inputted shown in FIG. 2 (c) to the light emitting ready only the odd fields of the vertical synchronizing signal VD, to emit light in synchronization only during odd fields.

【0014】図2(d)は、テレビカメラ1のシャッター動作を示すものであり、シャッター時間は設定スイッチ7により任意の時間に設定することができる。 [0014] FIG. 2 (d), which shows the shutter operation television camera 1, a shutter time can be set to any time by setting the switch 7.

【0015】また、自動追従回路8は、設定スイッチ7 [0015] In addition, the automatic follow-up circuit 8, set switch 7
で設定された時間に対し、LED10の発光タイミングと発光時間を自動的に追従させる機能を有するもので、 In contrast set time, it has a function to automatically follow the light emission time and light emission timing of the LED 10,
図3は、シャッター時間を変更した時のシャッターとL Figure 3, and the shutter when you change the shutter time L
ED発光動作の関係を示すタイミングチャートである。 Is a timing chart showing the relationship between the ED light-emitting operation.
この自動追従回路8により、短いシャッター時間(図3 The automatic follow-up circuit 8, a short shutter time (Fig. 3
(b)参照)に対する発光信号の動作(図2(c)参照)と、長いシャッター時間(図3(d)参照)を設定したときのLED10の発光タイミング(図2(e)参照)と、LED10の発光時間(図3(e)参照)の関係が自動的に追従していることを示している。 (B) refer) emission signal behavior for the reference (FIG. 2 (c)), a long shutter time (FIG. 3 (d) emission timing of LED10 at the time of setting the reference) reference (FIG. 2 (e)), LED10 of the light emission time indicates that the relationship (FIG. 3 (e) see) is automatically follow.

【0016】一方、テレビカメラ1のシャッター動作とLED10の発光動作との同期は、画像処理装置11から送られてくる水平同期信号HD(図2(a)参照)をカウンタ回路6によりデジタル的に計数するため、正確なタイミングで動作する。 [0016] On the other hand, the synchronization with the light emission operation of the shutter operation and LED10 of the television camera 1, the horizontal synchronizing signal HD sent from the image processing apparatus 11 (see FIG. 2 (a)) digitally by the counter circuit 6 for counting, it operates at an accurate timing. (従来はアナログ式タイマーであった。)また、発光タイミングt1は、シャッターが切れるよりも早い時間となるように設定し、LED1 (Which has been conventionally analog timer.) Further, the light emitting timing t1 is set to be earlier in time than the shutter is released, LED1
0の発光タイミングが遅れて露光不足となることを防止している。 0 of the light emitting timing lagging prevented from becoming underexposed.

【0017】また、駆動回路9は、LED10に必要な駆動電流を得るための電流増幅機能を有し、ANDゲート回路5からの発光信号によりLED10をパルス駆動発光する。 Further, the drive circuit 9 has a current amplification function for obtaining a driving current required to LED 10, pulsing emitting LED 10 by the light emission signal from the AND gate circuit 5. 該LED10は、テレビカメラの波長感度特性や使用目的により波長を選択し、必要な光量を得るための個数、被写体13の大きさに合わせた配光特性を考慮した構造になっている。 The LED10 is adapted to select the wavelength by the wavelength sensitivity characteristics and intended use of the television camera, the number for obtaining the necessary amount of light, considering the light distribution characteristic corresponding to the size of the object 13 structure.

【0018】尚、本発明は、図1に点線で示すようにテレビカメラの映像信号(コンポジット信号)Sから、同期分離回路12を用いて垂直同期信号及び水平同期信号を分離してLED10の発光タイミングを設定することにより、前記実施例と同様の機能を実現することができる。 [0018] The present invention is a television camera video signal (composite signal) S of the as shown by the dotted line in FIG. 1, LED 10 emitting the separated vertical synchronizing signal and a horizontal synchronizing signal by using the synchronous separation circuit 12 by setting the timing, it is possible to implement the same function as the previous examples. また、図1に示す実施例では、LED10部と電子回路を一体の筐体に収容したものを示したが、該LED In the embodiment shown in FIG. 1, showed that housed integrally housing the LED10 parts and electronic circuits, the LED
部を被写体13を臨む位置に分離して構成することが可能であることはいうまでもない。 It goes without saying parts can be configured to separate at a position facing the subject 13.

【0019】 [0019]

【発明の効果】本発明に係るテレビカメラ用LED照明装置は、以上のように構成したから、光源としてLED LED lighting device for a television camera according to the present invention, since the structure described above, LED as a light source
を使用し、テレビカメラを駆動する画像処理装置からの垂直及び水平同期信号、或はテレビカメラからのコンポジット信号と同期させて発光駆動させる構造にしたことにより、 (1)電球を用いた照明と同様な動画像の映像が得られる。 Using the vertical and horizontal synchronizing signals from the image processing device for driving a television camera, or by having a structure in which light is emitted driven in synchronization with the composite signal from the television camera, the illumination with (1) Bulb similar images of a moving image is obtained. (2)露光量を安定化させることができる。 (2) exposure to can be stabilized. (3)発光タイミングを安定化させることができる。 (3) the emission timing can be stabilized. (4)光量調整を簡単にすることができる。 (4) it is possible to simplify the light quantity adjustment. (5)省電力化することができる。 (5) can be power saving. (6)長寿命化することができる。 (6) can be long life. (7)テレビカメラのフィールド毎にLEDを発光させることにより、等価的に2倍の光量を得ることができる。 (7) by emission of the LED for each field of the television camera, equivalently it can be obtained 2 times the intensity. 等の特徴を有するものであり、本発明の実施によって得られる効果は極めて大きい。 Those having features like, effects obtained by the practice of the present invention is extremely large.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明に係るテレビカメラ用LED照明装置の一実施例を示すLED照明装置をCCDカメラと組み合わせた状態のブロック図である。 1 is a block diagram of a state in combination with CCD camera LED lighting apparatus according to an exemplary embodiment of a LED lighting device for a television camera according to the present invention.

【図2】同装置の信号タイミングチャートである。 2 is a signal timing chart of the apparatus.

【図3】シャッター時間を変更した時のシャッターとL [Figure 3] shutter when you change the shutter time and L
ED発光動作の関係を示すタイミングチャートである。 Is a timing chart showing the relationship between the ED light-emitting operation.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 テレビカメラ 2 フィールド選択回路 3 設定スイッチ 4 発光同期モード選択スイッチ 5 ANDゲート回路 6 カウンタ回路 8 自動追従回路 9 駆動回路 10 LED 11 画像処理装置 12 同期分離回路 13 被写体 14 LED照明装置 1 a television camera 2 field selection circuit 3 sets the switch 4 emission synchronous mode selector switch 5 the AND gate circuit 6 counter circuit 8 automatic follow-up circuit 9 drive circuit 10 LED 11 image processing apparatus 12 sync separator 13 subject 14 LED illumination device

───────────────────────────────────────────────────── フロントページの続き (72)発明者 飯田 悦男 神奈川県横浜市戸塚区前田町100番地 小 糸工業株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Etsuo Iida Kanagawa Prefecture, Totsuka-ku, Yokohama-shi Maeda-cho, address 100 small yarn industrial Co., Ltd. in

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 テレビカメラのシャッター動作と同期してLEDをパルス発光することを特徴とするテレビカメラ用LED照明装置。 1. A television camera television camera LED lighting device characterized by pulsed light emission of the LED in synchronism with the shutter operation of the.
JP15302792A 1992-05-21 1992-05-21 TV camera led lighting device Expired - Lifetime JP2994139B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP15302792A JP2994139B2 (en) 1992-05-21 1992-05-21 TV camera led lighting device

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JPH05328210A true true JPH05328210A (en) 1993-12-10
JP2994139B2 JP2994139B2 (en) 1999-12-27

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US7076162B2 (en) 2002-03-15 2006-07-11 Sharp Kabushiki Kaisha Mobile equipment and mobile phone with shooting function
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US8687109B2 (en) 2003-08-04 2014-04-01 Sharp Kabushiki Kaisha Image capturing device having pulsed LED flash

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US7139474B2 (en) 2002-03-15 2006-11-21 Sharp Kabushiki Kaisha Mobile equipment and mobile phone with shooting function
US7480454B2 (en) 2002-03-15 2009-01-20 Sharp Kabushiki Kaisha Mobile equipment and mobile phone with shooting function
US7076162B2 (en) 2002-03-15 2006-07-11 Sharp Kabushiki Kaisha Mobile equipment and mobile phone with shooting function
US7085489B2 (en) 2002-03-15 2006-08-01 Sharp Kabushiki Kaisha Mobile device and mobile telephone device having imaging function
US7277630B2 (en) 2002-03-15 2007-10-02 Sharp Kabushiki Kaisha Mobile equipment and mobile phone with shooting function
JP2004199041A (en) * 2002-12-13 2004-07-15 Commissariat A L'energie Atomique Optical microscope with modifiable lighting and method of operation thereof
US7746405B2 (en) 2002-12-27 2010-06-29 Casio Computer Co., Ltd. Illumination apparatus, imaging apparatus and irradiation method for an imaging apparatus comprising light emitting diodes which are duty-driven during an imaging period of a frame period
WO2004062268A1 (en) * 2002-12-27 2004-07-22 Casio Computer Co., Ltd. Illumination apparatus and illumination method for an imaging apparatus
US8687109B2 (en) 2003-08-04 2014-04-01 Sharp Kabushiki Kaisha Image capturing device having pulsed LED flash
GB2425362A (en) * 2005-04-19 2006-10-25 Accu Sort Systems Inc Synchronizing image capture with strobing light source
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