JP2012048001A - Light emitting device - Google Patents

Light emitting device Download PDF

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JP2012048001A
JP2012048001A JP2010190512A JP2010190512A JP2012048001A JP 2012048001 A JP2012048001 A JP 2012048001A JP 2010190512 A JP2010190512 A JP 2010190512A JP 2010190512 A JP2010190512 A JP 2010190512A JP 2012048001 A JP2012048001 A JP 2012048001A
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light
light emission
light emitting
emitting device
temperature
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JP2012048001A5 (en
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Norifumi Nakagawa
憲史 仲川
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Nikon Corp
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Nikon Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device capable of efficiently emitting light while preventing deterioration of the light emitting device due to increase in temperature.SOLUTION: A light emitting device 1 of the present invention includes a light emitting part 3 adapted to emit illumination light by application of voltage, an optical member 5 provided in a light emitting direction of the illumination light, temperature measuring means 6 adapted to measure a temperature of the optical member 5, a booster circuit 13 adapted to generate a charging voltage to be supplied to the light emitting part 3 by boosting a power source voltage, and light emitting control means 10 adapted to set a light emitting interval suitable for continuously emitting the illumination light in accordance with the temperature of the optical member 5 measured by the temperature measuring means 6 and control timing of the light emission by the light emitting part 3 based on the set light emitting interval.

Description

本発明は、撮影時に被写体を証明するために用いられる発光装置に関するものである。   The present invention relates to a light emitting device used to prove a subject at the time of shooting.

撮影時に被写体を照明するためにカメラ等に装着される発光装置がある。このような発光装置においては、連続発光すると、発光部近傍に設けられたフレネルレンズ等のカバーレンズの温度が上昇し、変形等する可能性がある。
このため、従来、温度検出手段をカバーレンズの近傍に取り付け、該温度検出手段によりカバーレンズの温度を測定し、温度が第１の温度以上になったら発光用のコンデンサの昇圧動作を制限し、第１の温度以上の第２の温度以上になったら昇圧動作を禁止している発光装置がある（例えば、特許文献１参照）。 There is a light-emitting device that is attached to a camera or the like to illuminate a subject during shooting. In such a light-emitting device, when the continuous light emission occurs, the temperature of a cover lens such as a Fresnel lens provided in the vicinity of the light-emitting portion may increase and be deformed.
For this reason, conventionally, a temperature detecting means is attached in the vicinity of the cover lens, the temperature of the cover lens is measured by the temperature detecting means, and when the temperature exceeds the first temperature, the boosting operation of the light emitting capacitor is limited, There is a light-emitting device that prohibits a boosting operation when the temperature becomes a second temperature that is equal to or higher than the first temperature (see, for example, Patent Document 1).

特許第３７６２００９号公報Japanese Patent No. 3762009

しかし、上記従来技術によると、コンデンサの昇圧動作の制限方法が一種類であるため、必ずしも実際の検出温度に応じた適切な制限が行われるわけではない。必要以上に昇圧動作が制限され、昇圧時間が長くなる可能性もある。また、第２の温度以上になると、測定温度が下がるまで昇圧が禁止され、一旦昇圧動作が禁止されると検出温度が低下するまで昇圧動作は行われないため、次の発光までに時間がかかる。   However, according to the above prior art, there is only one type of method for restricting the boosting operation of the capacitor, and therefore, appropriate restriction according to the actual detected temperature is not necessarily performed. The boosting operation is limited more than necessary, and the boosting time may be longer. Further, when the temperature is higher than the second temperature, boosting is prohibited until the measured temperature decreases, and once the boosting operation is prohibited, the boosting operation is not performed until the detected temperature is lowered, so it takes time until the next light emission. .

本発明の課題は、発光装置の温度上昇による劣化を防止しつつ、効率良く発光が可能な発光装置を提供することにある。   An object of the present invention is to provide a light emitting device capable of efficiently emitting light while preventing deterioration of the light emitting device due to temperature rise.

本発明は、以下のような解決手段により前記課題を解決する。なお、理解を容易にするために、本発明の実施形態に対応する符号を付して説明するが、これに限定されるものではない。   The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.

請求項１記載の発明は、電圧の印加により照明光を発光する発光部（３）と、前記照明光の発光方向に設けられた光学部材（５）と、前記光学部材（５）の温度を計測する温度計測手段（６）と、電源電圧を昇圧することにより、前記発光部（３）に供給する充電用の電圧を生成する昇圧回路（１３）と、前記温度計測手段（６）により計測された前記光学部材（５）の温度に応じて前記照明光を連続発光するのに適した発光間隔を設定すると共に、設定した前記発光間隔に基づいて前記発光部（３）における発光のタイミングを制御する発光制御手段（１０）と、を備えることを特徴とする発光装置（１）である。
請求項２記載の発明は、請求項１に記載の発光装置（１）において、前記光学部材（５）の温度と、前記発光部（３）を連続発光させたときに前記光学部材（５）を融解させない発光間隔とを対応付けたデータを記憶するデータ記憶手段（１６）を備え、前記発光制御手段（１０）は、前記温度計測手段（６）により計測された前記光学部材（５）の温度と、前記データ記憶手段（１６）に記憶されている前記データとに基づいて前記発光間隔を設定すること、を特徴とする発光装置（１）である。
請求項３記載の発明は、請求項１又は２に記載の発光装置（１）において、前記発光制御手段（１０）は、設定した前記発光間隔に基づいて前記昇圧回路（１３）における昇圧動作のデューティ比を変更すること、を特徴とする発光装置（１）である。
請求項４記載の発明は、請求項１〜３のいずれか一項に記載の発光装置（１）において、前記発光制御手段（１０）は、設定した前記発光間隔と、前記発光部（３）における直前の発光量とに基づいて前記昇圧回路（１３）における昇圧動作のデューティ比を変更すること、を特徴とする発光装置（１）である。
請求項５記載の発明は、請求項４に記載の発光装置（１）において、前記発光制御手段（１０）は、前記発光部（３）における直前の前記発光量が設定値よりも大きいときにはデューティ比をより小さくし、前記発光量が設定値よりも小さいときにはデューティ比をより大きくすること、を特徴とする発光装置（１）である。
請求項６記載の発明は、請求項３又は４に記載の発光装置（１）において、前記発光制御手段（１０）は、昇圧動作の開始直後においてはデューティ比を大きくし、昇圧動作の終了間近においてはデューティ比を小さくすること、を特徴とする発光装置（１）である。
請求項７記載の発明は、請求項１又は２に記載の発光装置（１）において、ユーザに充電完了を報知する充電完了報知手段を備え、前記発光制御手段（１０）は、設定した前記発光間隔に基づいて、前記充電完了報知手段により充電完了を報知するタイミングを遅らせること、を特徴とする発光装置（１）である。
請求項８記載の発明は、請求項１又は２に記載の発光装置（１）において、前記発光制御手段（１０）は、設定した前記発光間隔に基づいて、前記発光部（３）における発光のタイミングを遅らせること、を特徴とする発光装置（１）である。
請求項９記載の発明は、請求項８に記載の発光装置（１）において、前記発光制御手段（１０）は、前記発光部（３）における直前の発光量が設定値よりも大きいときには前記発光部（３）における発光タイミングの遅れを大きくし、前記発光部（３）における直前の前記発光量が設定値よりも小さいときには前記発光部（３）における発光タイミングの遅れを小さくすること、を特徴とする発光装置（１）である。
なお、符号を付して説明した構成は、適宜改良してもよく、また、少なくとも一部を他の構成物に代替してもよい。 According to the first aspect of the present invention, the temperature of the light emitting part (3) that emits illumination light by applying voltage, the optical member (5) provided in the light emission direction of the illumination light, and the temperature of the optical member (5) Measured by a temperature measuring means (6) for measuring, a booster circuit (13) for generating a charging voltage to be supplied to the light emitting section (3) by boosting the power supply voltage, and the temperature measuring means (6) A light emission interval suitable for continuously emitting the illumination light is set according to the temperature of the optical member (5), and the light emission timing in the light emitting unit (3) is set based on the set light emission interval. And a light emission control means (10) for controlling the light emission device (1).
According to a second aspect of the present invention, in the light emitting device (1) according to the first aspect, the temperature of the optical member (5) and the optical member (5) when the light emitting portion (3) emits light continuously. Data storage means (16) for storing data in association with the light emission interval that does not melt the light, and the light emission control means (10) is configured to measure the temperature of the optical member (5) measured by the temperature measurement means (6). The light emitting device (1) is characterized in that the light emission interval is set based on a temperature and the data stored in the data storage means (16).
According to a third aspect of the present invention, in the light emitting device (1) according to the first or second aspect, the light emission control means (10) performs a step-up operation in the step-up circuit (13) based on the set light emission interval. A light emitting device (1) characterized by changing a duty ratio.
According to a fourth aspect of the present invention, in the light emitting device (1) according to any one of the first to third aspects, the light emission control means (10) includes the set light emission interval and the light emitting unit (3). The light-emitting device (1) is characterized in that the duty ratio of the boosting operation in the booster circuit (13) is changed based on the immediately preceding light emission amount.
According to a fifth aspect of the present invention, in the light emitting device (1) according to the fourth aspect, the light emission control means (10) has a duty when the light emission amount immediately before the light emitting unit (3) is larger than a set value. The light emitting device (1) is characterized in that the ratio is made smaller and the duty ratio is made larger when the light emission amount is smaller than a set value.
According to a sixth aspect of the present invention, in the light emitting device (1) according to the third or fourth aspect of the invention, the light emission control means (10) increases the duty ratio immediately after the start of the boosting operation and is nearing the end of the boosting operation. Is a light emitting device (1) characterized in that the duty ratio is reduced.
The invention according to claim 7 is the light emitting device (1) according to claim 1 or 2, further comprising charging completion notification means for notifying the user of completion of charging, wherein the light emission control means (10) is configured to set the light emission. The light emitting device (1) is characterized in that, based on the interval, the charging completion notification means delays the timing of notification of charging completion.
According to an eighth aspect of the present invention, in the light emitting device (1) according to the first or second aspect, the light emission control means (10) emits light in the light emitting section (3) based on the set light emission interval. The light emitting device (1) is characterized by delaying the timing.
According to a ninth aspect of the present invention, in the light emitting device (1) according to the eighth aspect, the light emission control means (10) is configured such that the light emission control unit (10) emits the light when a light emission amount immediately before the light emitting unit (3) is larger than a set value. The delay of the light emission timing in the light emitting unit (3) is increased, and the light emission timing delay in the light emitting unit (3) is reduced when the light emission amount immediately before the light emitting unit (3) is smaller than a set value. The light emitting device (1).
Note that the configuration described with reference numerals may be modified as appropriate, and at least a part of the configuration may be replaced with another component.

本発明によれば、発光装置の温度上昇による劣化を防止しつつ、効率良く発光が可能な発光装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the light-emitting device which can light-emit efficiently can be provided, preventing the deterioration by the temperature rise of a light-emitting device.

発光装置の概略図である。It is the schematic of a light-emitting device. 発光装置のブロック図である。It is a block diagram of a light-emitting device. 温度検出装置の検出温度と連続発光間隔との関係を示すグラフである。It is a graph which shows the relationship between the detection temperature of a temperature detection apparatus, and a continuous light emission interval.

以下、図面を参照して、本発明の第一実施形態の発光装置について説明する。
図１は、発光装置１の概略図である。本実施形態では、発光装置１として、例えば一眼レフカメラに着脱可能に取り付けられる外付け用の発光装置１について説明するが、これに限定されず、カメラと一体型の発光装置であってもよい。 Hereinafter, a light emitting device according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view of a light emitting device 1. In the present embodiment, for example, an external light emitting device 1 that is detachably attached to a single-lens reflex camera will be described as the light emitting device 1, but the present invention is not limited to this, and a light emitting device integrated with a camera may be used. .

図示するように、発光装置１は、閃光を発光するキセノン管２を有する発光部３と、発光部３を覆う筐体４と、筐体４の被写体側開口部を覆うカバーレンズ５とを備える。カバーレンズ５は、プラスチック製のフレネルレンズ等であり、キセノン管２から発光された光を拡散させるものである。
筐体４の内面のカバーレンズ５近傍には、サーミスタや温度センサＩＣ等の温度検出装置６が取り付けられている。温度検出装置６は、後述する制御部１０に接続されている。 As shown in the figure, the light emitting device 1 includes a light emitting unit 3 having a xenon tube 2 that emits flash light, a housing 4 that covers the light emitting unit 3, and a cover lens 5 that covers a subject-side opening of the housing 4. . The cover lens 5 is a plastic Fresnel lens or the like, and diffuses the light emitted from the xenon tube 2.
In the vicinity of the cover lens 5 on the inner surface of the housing 4, a temperature detection device 6 such as a thermistor or a temperature sensor IC is attached. The temperature detection device 6 is connected to a control unit 10 described later.

図２は発光装置１のブロック図である。
発光装置１は、電池１１を収納可能な電池収納部１２と、電池収納部１２に接続された昇圧回路１３と、その昇圧回路１３の二次側に配置された整流素子１４と、高電圧に充電されるコンデンサ１５とを備える。
さらに発光装置１は、上述の発光部３と、温度検出装置６と、発光部３の発光動作を行う発光回路１７と、発光装置１全体を制御する制御部１０とを備える。 FIG. 2 is a block diagram of the light emitting device 1.
The light emitting device 1 includes a battery storage unit 12 that can store a battery 11, a booster circuit 13 connected to the battery storage unit 12, a rectifier element 14 disposed on the secondary side of the booster circuit 13, and a high voltage. And a capacitor 15 to be charged.
The light-emitting device 1 further includes the above-described light-emitting unit 3, the temperature detection device 6, a light-emitting circuit 17 that performs a light-emitting operation of the light-emitting unit 3, and a control unit 10 that controls the entire light-emitting device 1.

発光装置１に設けられた電源（図示せず）がオンにされると、制御部１０は初期チェックを行い、昇圧回路１３を動作させ、所定の電圧までコンデンサ１５を充電して昇圧回路１３を停止させる。
次に制御部１０は、発光装置１が取り付けられているカメラから発光指示を受信すると、発光回路１７を動作させて、発光部３を発光させる。なお、発光指示は、カメラのレリーズボタンの全押し動作に連動している。 When a power source (not shown) provided in the light emitting device 1 is turned on, the control unit 10 performs an initial check, operates the booster circuit 13, charges the capacitor 15 to a predetermined voltage, and sets the booster circuit 13. Stop.
Next, when receiving a light emission instruction from the camera to which the light emitting device 1 is attached, the control unit 10 operates the light emitting circuit 17 to cause the light emitting unit 3 to emit light. Note that the light emission instruction is linked to the full pressing operation of the release button of the camera.

発光部３の発光が終了するとカバーレンズ５近傍の温度が温度検出装置６によって検出される。検出された温度情報は制御部１０に送られる。
連続発光する場合、制御部１０は、再度、昇圧回路１３を動作させてコンデンサ１５を充電させる。この際、温度検出装置６によって検出された温度に応じて、昇圧回路１３によるコンデンサ１５の充電速度が変更される。
すなわち、温度検出装置６によって検出された温度によって、連続発光を行うことが可能な連続発光間隔が変更される。 When the light emission from the light emitting unit 3 is completed, the temperature in the vicinity of the cover lens 5 is detected by the temperature detection device 6. The detected temperature information is sent to the control unit 10.
In the case of continuous light emission, the control unit 10 operates the booster circuit 13 again to charge the capacitor 15. At this time, the charging speed of the capacitor 15 by the booster circuit 13 is changed according to the temperature detected by the temperature detection device 6.
That is, the continuous light emission interval at which continuous light emission can be performed is changed according to the temperature detected by the temperature detection device 6.

図３は、カバーレンズ５の近傍に設けられた温度検出装置６の検出温度の温度と、発光部３を連続発光させたときにカバーレンズ５を融解させない発光間隔とを対応付けたグラフである。なお、このグラフは、フル発光を行う場合のグラフである。本実施形態で制御部１０は、このグラフの関係を示すテーブルを記憶している記憶部１６（図２に図示）を備えている。
ただし、本発明はこれに限定されず、制御部１０は、記憶部１６に温度検出装置６の検出温度と連続発光間隔との関係を示すテーブルを記憶する代わりに、検出温度と連続発光時間との関数を演算してもよい。 FIG. 3 is a graph in which the temperature detected by the temperature detection device 6 provided in the vicinity of the cover lens 5 is associated with a light emission interval that does not melt the cover lens 5 when the light emitting unit 3 emits light continuously. . This graph is a graph when full light emission is performed. In the present embodiment, the control unit 10 includes a storage unit 16 (shown in FIG. 2) that stores a table indicating the relationship of the graph.
However, the present invention is not limited to this, and the control unit 10 stores the detected temperature and the continuous light emission time instead of storing a table indicating the relationship between the detected temperature of the temperature detection device 6 and the continuous light emission interval in the storage unit 16. The function may be calculated.

図３のグラフによると、温度検出装置６の検出温度が７０度以上で８０度より低い場合、連続発光間隔は２秒である。検出温度が８０度以上で９０度より低い場合、連続発光間隔は３秒である。検出温度が９０度以上で１００度より低い場合、連続発光間隔は４秒である。検出温度が１００度以上で１１０度より低い場合、連続発光間隔は５秒である。検出温度が１１０度以上で１２０度より低い場合、連続発光間隔は７秒である。検出温度が１２０度以上で１３０度より低い場合、連続発光間隔は１０秒である。検出温度が１３０度以上の場合、連続発光間隔は１２秒である。   According to the graph of FIG. 3, when the temperature detected by the temperature detecting device 6 is 70 degrees or higher and lower than 80 degrees, the continuous light emission interval is 2 seconds. When the detected temperature is 80 degrees or higher and lower than 90 degrees, the continuous light emission interval is 3 seconds. When the detected temperature is 90 degrees or higher and lower than 100 degrees, the continuous light emission interval is 4 seconds. When the detected temperature is 100 degrees or higher and lower than 110 degrees, the continuous light emission interval is 5 seconds. When the detected temperature is 110 degrees or higher and lower than 120 degrees, the continuous light emission interval is 7 seconds. When the detected temperature is 120 degrees or higher and lower than 130 degrees, the continuous light emission interval is 10 seconds. When the detected temperature is 130 ° C. or higher, the continuous light emission interval is 12 seconds.

このように、温度検出装置６の検出温度による、連続発光間隔の変更は、制御部１０から昇圧回路１３へ送られる信号のデューティ比を変更することで行われる。
デューティ比は、充電時間／（充電時間＋充電停止時間）で表される。すなわち、デューティ比が大きいということは、充電停止時間が短く、短時間で充電可能なため、連続発光間隔が短くなる。デューティ比が小さいということは、充電停止時間が長く、連続発光間隔が長くなる。 Thus, the change of the continuous light emission interval according to the temperature detected by the temperature detection device 6 is performed by changing the duty ratio of the signal sent from the control unit 10 to the booster circuit 13.
The duty ratio is expressed by charging time / (charging time + charging stop time). That is, when the duty ratio is large, the continuous light emission interval is shortened because the charging stop time is short and the charging can be performed in a short time. A small duty ratio means that the charging stop time is long and the continuous light emission interval is long.

本実施形態で、デューティ比＝１の場合、すなわち、充電を停止せず継続した場合の、発光装置１が発光可能となる時間は、例えば１秒である。温度検出装置６の検出温度が７０度より低い場合、デューティ比＝１で、充電は停止せず、この最短時間の１秒で充電される。
温度検出装置６の検出温度が高くなるに従い、段階的にデューティ比が小さくなり、発光装置１が発光可能になるまでの時間が長くなる。例えば、デューティ比が１／２の場合、発光装置１が発光可能になるまでの時間は２秒になる。例えば、デューティ比が１／３の場合、発光装置１が発光可能になるまでの時間は３秒になる。 In the present embodiment, when the duty ratio is 1, that is, when the charging is continued without stopping, the time during which the light emitting device 1 can emit light is, for example, 1 second. When the temperature detected by the temperature detection device 6 is lower than 70 degrees, the duty ratio = 1, charging is not stopped, and charging is performed in 1 second, which is the shortest time.
As the detected temperature of the temperature detecting device 6 increases, the duty ratio decreases stepwise, and the time until the light emitting device 1 can emit light becomes longer. For example, when the duty ratio is 1/2, the time until the light emitting device 1 can emit light is 2 seconds. For example, when the duty ratio is 1/3, the time until the light emitting device 1 can emit light is 3 seconds.

本実施形態において、カバーレンズ５の融解温度は約１３０度である。温度検出装置６の検出温度が１３０度になると、連続発光間隔は１２秒となる。この１２秒は、本実施形態の発光装置１における発光による温度上昇分が冷却可能な時間である。温度検出装置６で１３０度が検出されたとき、１２秒間発光しないと、カバーレンズ５の温度は低下する。１２秒後に発光しても、１３０度以上にはならず、発光装置１の融解による変形や破壊が防止される。
なお、温度検出装置６の検出温度が１３０度になった場合、発光装置１の背面等に警告を表示するようにしてもよい。 In the present embodiment, the melting temperature of the cover lens 5 is about 130 degrees. When the temperature detected by the temperature detecting device 6 is 130 degrees, the continuous light emission interval is 12 seconds. This 12 seconds is a time during which the temperature rise due to light emission in the light emitting device 1 of the present embodiment can be cooled. When 130 degrees is detected by the temperature detection device 6, the temperature of the cover lens 5 is lowered unless light is emitted for 12 seconds. Even if it emits light after 12 seconds, it does not exceed 130 degrees, and deformation and destruction due to melting of the light emitting device 1 are prevented.
When the temperature detected by the temperature detecting device 6 reaches 130 degrees, a warning may be displayed on the back surface of the light emitting device 1 or the like.

以上、本実施形態によると、以下の効果を有する。   As described above, this embodiment has the following effects.

（１）本実施形態は、発光装置１のカバーレンズ５の近傍の温度に応じて、コンデンサを充電するための信号のデューティ比を細かく変更し、充電時間を段階的に変更している。したがって、カバーレンズ５が変形等することのない必要且つ十分な時間で連続発光間隔が決定されるので、充電時間が不必要に長くなることがなく、効率がよい。 (1) In this embodiment, the duty ratio of the signal for charging the capacitor is finely changed according to the temperature in the vicinity of the cover lens 5 of the light emitting device 1, and the charging time is changed stepwise. Therefore, since the continuous light emission interval is determined in a necessary and sufficient time without the cover lens 5 being deformed or the like, the charging time is not unnecessarily prolonged and the efficiency is high.

（２）本実施形態では、温度検出装置６による検出温度によらず、充電速度は異なるものの、コンデンサ１５の充電は行うので、連続発光間隔が不必要に長くなることがない。 (2) In this embodiment, although the charging speed is different regardless of the temperature detected by the temperature detecting device 6, the capacitor 15 is charged, so that the continuous light emission interval does not become unnecessarily long.

（３）カバーレンズ５の融解温度付近まで温度上昇（例えば１３０度）すると、融解温度を越えない発光間隔で、発光が継続される。したがって、発光装置１の温度上昇による変形等の劣化を防止しつつ、効率良く発光が可能である。 (3) When the temperature rises to near the melting temperature of the cover lens 5 (for example, 130 degrees), light emission is continued at a light emission interval that does not exceed the melting temperature. Therefore, it is possible to emit light efficiently while preventing deterioration such as deformation due to a temperature rise of the light emitting device 1.

（変形形態）
以上説明した実施形態に限定されることなく、本発明は以下に示すような種々の変形や変更が可能であり、それらも本発明の範囲内である。 (Deformation)
Without being limited to the embodiment described above, the present invention can be variously modified and changed as described below, and these are also within the scope of the present invention.

（１）上述の実施形態では、温度検出装置６の検出温度により制御部１０から昇圧回路１３へ送られる信号のデューティ比を変更したが、これに限定されない。発光部３の直前の発光量によってデューティ比を変更してもよい。例えば、小発光の場合、温度上昇は少ないのでデューティ比を大きくし、大発光の場合は温度上昇が大きいのでデューティ比を小さくする。
この場合、小発光、中発光、大発光において、予め、どのぐらい発熱量があるかを測定し、それぞれ、どのぐらいの充電時間が適切かを予め決定しておく。それに併せて充電時間を延長するようにデューティ比を変更する。例えば、大発光の場合は小発光に比べてデューティ比を１／３倍、中発光なら１／２倍というような制御を行う。 (1) In the above-described embodiment, the duty ratio of the signal sent from the control unit 10 to the booster circuit 13 is changed according to the temperature detected by the temperature detection device 6, but the present invention is not limited to this. The duty ratio may be changed according to the light emission amount immediately before the light emitting unit 3. For example, in the case of small emission, the temperature rise is small and the duty ratio is increased. In the case of large emission, the temperature rise is large and the duty ratio is reduced.
In this case, the amount of heat generated is measured in advance for small light emission, medium light emission, and large light emission, and each charging time is determined in advance. At the same time, the duty ratio is changed so as to extend the charging time. For example, the control is performed such that the duty ratio is 1/3 times that in the case of large light emission and 1/2 times that in the case of medium light emission.

（２）また、発光の直後か充電完了近くかでデューティ比を変えるようにしてもよい。例えば、発光直後はデューティ比を大きくして充電完了近くはデューティ比を小さくする。 (2) The duty ratio may be changed immediately after light emission or near the completion of charging. For example, the duty ratio is increased immediately after light emission, and the duty ratio is decreased near the completion of charging.

（３）発光間隔を伸ばす方法としては、デューティ比を変更せず、充電は一定の速度で行い、レディーランプの点灯を遅らせるようにしてもよい。 (3) As a method of extending the light emission interval, charging may be performed at a constant speed without changing the duty ratio, and the ready lamp may be turned on.

（４）さらに、予め、温度検出装置６により検出された温度に対応して設定された時間だけ発光タイミングを遅らせてもよい。
また、上記実施形態及び変形形態は適宜に組み合わせて用いることができるが、各実施形態の構成は図示と説明により明らかであるため、詳細な説明を省略する。さらに、本発明は以上説明した実施形態によって限定されることはない。 (4) Furthermore, the light emission timing may be delayed by a time set in advance corresponding to the temperature detected by the temperature detection device 6.
Moreover, although the said embodiment and modification can be used in combination suitably, since the structure of each embodiment is clear by illustration and description, detailed description is abbreviate | omitted. Furthermore, the present invention is not limited by the embodiment described above.

１：発光装置、３：発光部、５：カバーレンズ、６：温度検出装置、１０：制御部、１３：昇圧回路、１５：コンデンサ   1: Light-emitting device, 3: Light-emitting unit, 5: Cover lens, 6: Temperature detection device, 10: Control unit, 13: Booster circuit, 15: Capacitor

Claims (9)

電圧の印加により照明光を発光する発光部と、
前記照明光の発光方向に設けられた光学部材と、
前記光学部材の温度を計測する温度計測手段と、
電源電圧を昇圧することにより、前記発光部に供給する充電用の電圧を生成する昇圧回路と、
前記温度計測手段により計測された前記光学部材の温度に応じて前記照明光を連続発光するのに適した発光間隔を設定すると共に、設定した前記発光間隔に基づいて前記発光部における発光のタイミングを制御する発光制御手段と、
を備えることを特徴とする発光装置。 A light emitting unit that emits illumination light by applying a voltage;
An optical member provided in the light emitting direction of the illumination light;
Temperature measuring means for measuring the temperature of the optical member;
A booster circuit that generates a voltage for charging to be supplied to the light emitting unit by boosting a power supply voltage;
A light emission interval suitable for continuously emitting the illumination light is set according to the temperature of the optical member measured by the temperature measuring means, and the light emission timing in the light emitting unit is set based on the set light emission interval. Light emission control means for controlling,
A light emitting device comprising: 請求項１に記載の発光装置において、
前記光学部材の温度と、前記発光部を連続発光させたときに前記光学部材を融解させない発光間隔とを対応付けたデータを記憶するデータ記憶手段を備え、
前記発光制御手段は、前記温度計測手段により計測された前記光学部材の温度と、前記データ記憶手段に記憶されている前記データとに基づいて前記発光間隔を設定すること、
を特徴とする発光装置。 The light-emitting device according to claim 1.
Data storage means for storing data in which the temperature of the optical member is associated with a light emission interval that does not melt the optical member when the light emitting unit continuously emits light,
The light emission control means sets the light emission interval based on the temperature of the optical member measured by the temperature measurement means and the data stored in the data storage means;
A light emitting device characterized by the above. 請求項１又は２に記載の発光装置において、
前記発光制御手段は、設定した前記発光間隔に基づいて前記昇圧回路における昇圧動作のデューティ比を変更すること、
を特徴とする発光装置。 The light-emitting device according to claim 1 or 2,
The light emission control unit changes a duty ratio of a boost operation in the boost circuit based on the set light emission interval;
A light emitting device characterized by the above. 請求項１〜３のいずれか一項に記載の発光装置において、
前記発光制御手段は、設定した前記発光間隔と、前記発光部における直前の発光量とに基づいて前記昇圧回路における昇圧動作のデューティ比を変更すること、
を特徴とする発光装置。 In the light-emitting device as described in any one of Claims 1-3,
The light emission control means changes the duty ratio of the boost operation in the boost circuit based on the set light emission interval and the previous light emission amount in the light emitting unit,
A light emitting device characterized by the above. 請求項４に記載の発光装置において、
前記発光制御手段は、前記発光部における直前の前記発光量が設定値よりも大きいときにはデューティ比をより小さくし、前記発光量が設定値よりも小さいときにはデューティ比をより大きくすること、
を特徴とする発光装置。 The light-emitting device according to claim 4.
The light emission control means reduces the duty ratio when the previous light emission amount in the light emitting unit is larger than a set value, and increases the duty ratio when the light emission amount is smaller than a set value;
A light emitting device characterized by the above. 請求項３又は４に記載の発光装置において、
前記発光制御手段は、昇圧動作の開始直後においてはデューティ比を大きくし、昇圧動作の終了間近においてはデューティ比を小さくすること、
を特徴とする発光装置。 The light-emitting device according to claim 3 or 4,
The light emission control means increases the duty ratio immediately after the start of the boosting operation, and decreases the duty ratio near the end of the boosting operation.
A light emitting device characterized by the above. 請求項１又は２に記載の発光装置において、
ユーザに充電完了を報知する充電完了報知手段を備え、
前記発光制御手段は、設定した前記発光間隔に基づいて、前記充電完了報知手段により充電完了を報知するタイミングを遅らせること、
を特徴とする発光装置。 The light-emitting device according to claim 1 or 2,
Charging completion notification means for notifying the user of the completion of charging;
The light emission control means delays the timing for notifying the completion of charging by the charging completion notifying means based on the set light emission interval;
A light emitting device characterized by the above. 請求項１又は２に記載の発光装置において、
前記発光制御手段は、設定した前記発光間隔に基づいて、前記発光部における発光のタイミングを遅らせること、
を特徴とする発光装置。 The light-emitting device according to claim 1 or 2,
The light emission control means delays the light emission timing in the light emitting unit based on the set light emission interval;
A light emitting device characterized by the above. 請求項８に記載の発光装置において、
前記発光制御手段は、前記発光部における直前の発光量が設定値よりも大きいときには前記発光部における発光タイミングの遅れを大きくし、前記発光部における直前の前記発光量が設定値よりも小さいときには前記発光部における発光タイミングの遅れを小さくすること、
を特徴とする発光装置。 The light-emitting device according to claim 8.
The light emission control unit increases the delay of the light emission timing in the light emitting unit when the light emission amount immediately before the light emitting unit is larger than a set value, and the light emission control unit when the light emission amount immediately before the light emitting unit is smaller than a set value. Reducing the delay of the light emission timing in the light emitting section,
A light emitting device characterized by the above.
JP2010190512A 2010-08-27 2010-08-27 Light emitting device Pending JP2012048001A (en)

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