JP2001153808A - Power supply for controlling lighting device - Google Patents
Power supply for controlling lighting deviceInfo
- Publication number
- JP2001153808A JP2001153808A JP33989299A JP33989299A JP2001153808A JP 2001153808 A JP2001153808 A JP 2001153808A JP 33989299 A JP33989299 A JP 33989299A JP 33989299 A JP33989299 A JP 33989299A JP 2001153808 A JP2001153808 A JP 2001153808A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- lighting device
- led
- dimming
- segment
- 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
Links
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＬＥＤ照明装置の
ＬＥＤの発光量を制御して被検査体への照度分布を自在
に調整し得る電源装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device capable of freely adjusting the illuminance distribution on an object to be inspected by controlling a light emission amount of an LED of an LED lighting device.
【０００２】[0002]
【従来の技術】近年、被検査体表面における凹凸や欠陥
などの表面性状や塵などの不純物を見出すための照明手
段としてＬＥＤが広く使用されている。複数のＬＥＤの
配列パターンを工夫することで、被検査体表面における
照度分布を均一にしたり、所望の照度分布を得ることが
容易に実現できるという利点がある。このようにして照
明された被検査体表面はＣＣＤカメラなどで撮像された
後、その画像データを表示装置に写して目視したり、画
像処理したりして被検査体の表面性状や不純物が検出さ
れる。この種のＬＥＤ照明装置は、例えば、特開平４−
２４１４７６号公報（名称：照明装置）、特公平７−５
０２９１号公報（名称：ビデオカメラ装置）、特開平２
−１００５８０号公報（名称：光学的撮影装置）などに
開示されている。2. Description of the Related Art In recent years, LEDs have been widely used as an illuminating means for finding surface properties such as irregularities and defects on the surface of an object to be inspected and impurities such as dust. By devising the arrangement pattern of the plurality of LEDs, there is an advantage that the illuminance distribution on the surface of the inspection object can be made uniform or a desired illuminance distribution can be easily realized. After the surface of the test object illuminated in this way is picked up by a CCD camera or the like, the image data is transferred to a display device for visual inspection or image processing to detect the surface properties and impurities of the test object. Is done. This type of LED lighting device is disclosed in, for example,
Japanese Patent Application Laid-Open No. 241476 (name: lighting device), Tokuhei 7-5
No. 0291 (name: video camera device),
No. 100580 (name: optical photographing apparatus).
【０００３】[0003]
【発明が解決しようとする課題】また、近年、被検査体
に全周方向から検査光を均一照射するだけでなく、被検
査体に特定方向からのみ検査光を照射し被検査面の凹凸
などを明瞭に顕在化させる工程や、照射方向に応じて検
査面の照度を変化させる工程などが要求されている。ま
た、ＬＥＤの発光波長域に特化した検査工程も要求され
る場合があり、このとき検査工程に適した発光波長域を
決めてＬＥＤを選択使用する必要がある。このように被
検査体の種類に応じて、ＬＥＤを選択し、照射方向によ
りＬＥＤの発光量を調整して照度分布を最適にし得る照
明装置が求められている。In recent years, in addition to uniformly irradiating the inspection object with the inspection light from all the circumferential directions, the inspection object is irradiated with the inspection light only from a specific direction, and irregularities on the inspection surface have been recently developed. There is a demand for a process of clearly exposing the image, a process of changing the illuminance of the inspection surface according to the irradiation direction, and the like. In some cases, an inspection process specialized for the emission wavelength range of the LED is also required. At this time, it is necessary to determine an emission wavelength range suitable for the inspection process and selectively use the LED. As described above, there is a demand for an illumination device that can select an LED in accordance with the type of the object to be inspected, adjust the light emission amount of the LED according to the irradiation direction, and optimize the illuminance distribution.
【０００４】しかしながら、このような多種多様な照度
分布を必要とする検査工程の各々に対応した照明装置を
一々用意していたのではコストがかかり効率が悪い。そ
こで、本発明者は、ＬＥＤを取り付けた複数の基板を用
意し、これら基板をドーム状に組み立ててなるＬＥＤ照
明装置を作製した。前記複数の基板に供給される電力信
号を基板毎に個別に制御することにより、一つの装置
で、被検査体を全周方向から均一照射したり、特定方向
からのみ照射したり、照射方向に応じて各基板のＬＥＤ
の発光量を変化させることができるため、所望の照度分
布を簡易に形成することが可能となった。[0004] However, it is costly and inefficient to prepare a single illuminator corresponding to each of the inspection processes that require such various illuminance distributions. Then, the present inventor prepared a plurality of substrates on which LEDs were mounted, and produced an LED lighting device in which these substrates were assembled in a dome shape. By individually controlling the power signals supplied to the plurality of substrates for each substrate, a single device can uniformly irradiate the test object from all circumferential directions, irradiate only from a specific direction, or irradiate in the irradiation direction. LED on each board according to
Since the amount of light emission can be changed, a desired illuminance distribution can be easily formed.
【０００５】それに伴い、要求される多種多様な照度分
布に対応させるため、前記ＬＥＤ照明装置の照度分布を
最適なものに効率良く調整し得る調光手段や、その照度
分布を記憶して利用し得る装置の必要性が生じた。Accordingly, in order to cope with a variety of required illuminance distributions, dimming means capable of efficiently adjusting the illuminance distribution of the LED lighting device to an optimum one, and storing and using the illuminance distribution. The need for a gained device has arisen.
【０００６】以上の事情に鑑み、本発明が解決しようと
するところは、ＬＥＤ照明装置の調光作業において、被
検査体の検査工程に対応した最適な照度分布を簡易な操
作で得ることができ、その照度分布を効率良く利用する
ことができ、更には検査効率と検査精度を向上せしめる
照明装置の制御電源を提供する点にある。In view of the above circumstances, an object of the present invention is to provide an optimal illuminance distribution corresponding to an inspection process of an object to be inspected by a simple operation in a dimming operation of an LED lighting device. Another object of the present invention is to provide a control power supply for a lighting device that can efficiently use the illuminance distribution and improve inspection efficiency and inspection accuracy.
【０００７】[0007]
【課題を解決するための手段】前記課題を解決すべく、
本発明者が鋭意検討し試行錯誤の末に到達するに至った
発明は、互いに独立に電力供給される複数のセグメント
を立体的に配設し、該セグメントの各々にＬＥＤを設け
てなるＬＥＤ照明装置を用意し、前記ＬＥＤ照明装置の
各セグメントに対応する調光値を設定し格納する調光レ
ベル記憶部と、該調光レベル記憶部に格納した調光値に
従って前記セグメントの各々に対してＬＥＤの発光量を
制御する出力制御部と、前記調光レベル記憶部および出
力制御部を制御する主制御部と、を備えることにより、
前記セグメント毎にＬＥＤの発光量を変化させ被検査体
への照度分布を調整せしめることを特徴とした照明装置
の制御電源である。In order to solve the above-mentioned problems,
SUMMARY OF THE INVENTION The present inventor has studied diligently and arrived at the end of trial and error. An LED lighting device in which a plurality of segments which are independently supplied with electric power are three-dimensionally arranged and an LED is provided for each of the segments. Prepare a device, a dimming level storage unit that sets and stores a dimming value corresponding to each segment of the LED lighting device, and for each of the segments according to the dimming value stored in the dimming level storage unit By including an output control unit that controls the light emission amount of the LED, and a main control unit that controls the dimming level storage unit and the output control unit,
A control power supply for a lighting device, characterized in that the light emission amount of an LED is changed for each segment to adjust the illuminance distribution on an object to be inspected.
【０００８】このような制御電源は、各セグメントを選
択し、選択したセグメントのＬＥＤの発光量を照度分布
を最適化するように調節して調光値を得る調光手段と、
前記調光値の組合せを前記調光レベル記憶部に記憶させ
る調光値記憶手段と、を備えることが好ましい。これに
より、多種多様な検査工程における照度分布を簡易に最
適化できると同時に、これら照度分布に対応した調光値
の組合せを記憶し、記憶した調光値の組合せを参照利用
することが可能となる。[0008] Such a control power supply includes a dimming means for selecting each segment and adjusting a light emission amount of the LED of the selected segment so as to optimize the illuminance distribution to obtain a dimming value;
Preferably, a dimming value storage unit for storing the dimming value combination in the dimming level storage unit is provided. As a result, it is possible to easily optimize the illuminance distribution in various inspection processes, and at the same time, it is possible to store combinations of dimming values corresponding to these illuminance distributions and to refer to and use the stored combinations of dimming values. Become.
【０００９】また、前記調光レベル記憶部としてバック
アップ電源により電力供給されたＲＡＭを用いることが
好ましい。これにより、主制御部の制御によりＲＡＭに
高速アクセスして調光値を取得し、各セグメントへ電力
信号を送出できるため、ＬＥＤの発光パターンの切換時
間を大幅に短縮することができ、複数の発光パターンを
瞬時に切り換えられるため、検査効率が向上する。Preferably, a RAM supplied with power from a backup power supply is used as the dimming level storage unit. With this, under the control of the main control unit, the RAM can be accessed at a high speed to obtain the dimming value and the power signal can be transmitted to each segment. Therefore, the switching time of the light emission pattern of the LED can be significantly reduced, Since the light emission pattern can be instantaneously switched, the inspection efficiency is improved.
【００１０】また、前記出力制御部は、各セグメントへ
の電力信号をパルス幅変調させるパルス幅変調回路を有
することが好ましい。これにより、ＬＥＤの発光に要す
る消費電力を低減できる。Further, it is preferable that the output control section has a pulse width modulation circuit for performing pulse width modulation of a power signal to each segment. Thereby, power consumption required for light emission of the LED can be reduced.
【００１１】さらに、前記出力制御部は、パワートラン
ジスタに代表される電力用半導体を備えたドライバ回路
を有することが望ましい。これにより、低電力で電力信
号のオン／オフ動作ができ、発光パターンを高速に切り
換えることが可能となる。Further, it is desirable that the output control section has a driver circuit provided with a power semiconductor represented by a power transistor. As a result, the power signal can be turned on / off with low power, and the light emission pattern can be switched at high speed.
【００１２】[0012]
【発明の実施の形態】以下に、本発明に係る照明装置の
制御電源の実施形態を図面を参照しながら説明する。図
１は、本発明に係る照明装置の制御電源の一実施例を示
す概略ブロック図である。先ず、複数のセグメント１，
セグメント２，…，セグメントＮを有し、これら各セグ
メントにＬＥＤを配設してなるＬＥＤ照明装置２を用意
する。本実施例の制御電源１は、このようなＬＥＤ照明
装置２のセグメントの各々に対してＬＥＤの発光量を制
御する出力制御部３と、前記各セグメントに対応する調
光値を設定し記憶する調光レベル記憶部４と、ＣＰＵ５
ａなどを有する主制御部５と、入出力インターフェース
６を介して主制御部５に接続しているパターン設定器
７、セグメント設定器８および光量調節器９などと、外
部機器１０への接続を介するインターフェース１１と、
からなるものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a control power supply for a lighting device according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram showing one embodiment of a control power supply for a lighting device according to the present invention. First, a plurality of segments 1,
An LED lighting device 2 having segments 2,..., And a segment N and having LEDs arranged in these segments is prepared. The control power supply 1 according to the present embodiment sets the output control unit 3 that controls the light emission amount of the LED for each of the segments of the LED lighting device 2 and sets and stores the dimming value corresponding to each of the segments. Light control level storage unit 4 and CPU 5
a, a pattern setting unit 7, a segment setting unit 8, a light amount adjusting unit 9, and the like connected to the main control unit 5 via the input / output interface 6, and to the external device 10. An interface 11 through
It consists of
【００１３】前記ＬＥＤ照明装置１は、単または複数の
ＬＥＤを設けたセグメント１，セグメント２，…，セグ
メントＮを有している。図３に、このようなＬＥＤ照明
装置１を例示して説明する。図３（ａ）は、本実施例の
ＬＥＤ照明装置２の底面図であり、同図（ｂ）は、同図
（ａ）のＡ−Ａ断面図である。本実施例のＬＥＤ照明装
置２は、１２個のセグメントを構成する屈曲可能なプリ
ント配線基板２０Ａ，２０Ｂ，…，２０Ｌを保持枠２１
の内部に取り付けて立体的なドーム形状となしたもので
ある。各プリント配線基板の内周面には、周方向に沿っ
て複数のＬＥＤ２２，２２，…が配設されており、各基
板にはＬＥＤ２２，２２，…に電力信号を供給する電力
供給線（図示せず）が上記出力制御部３から延びて接続
されている。このように複数の基板を立体的に組み立て
る際、各基板のＬＥＤの配設面の法線角度を調整しその
立体的形状を工夫することにより、所望の照度分布で被
検査体を照明することが可能となる。また、前記保持枠
２１には軸心に沿った中心孔２１ａが貫通形成されてお
り、図２に示すように、中心孔２１ａの下方に配置した
被検査体２３をＬＥＤ２２，２２，…の出射光で照射
し、中心孔２１ａの上方に配置したＣＣＤイメージセン
サなどの撮像装置２４で当該被検査体２３の表面像を得
て、この像に基づき被検査体２３を検査するのである。The LED lighting device 1 has a segment 1, a segment 2,..., A segment N provided with one or a plurality of LEDs. FIG. 3 illustrates such an LED lighting device 1 as an example. FIG. 3A is a bottom view of the LED lighting device 2 of the present embodiment, and FIG. 3B is a cross-sectional view taken along the line AA of FIG. The LED lighting device 2 of the present embodiment is configured such that the bendable printed circuit boards 20A, 20B,...
It is a three-dimensional dome shape attached to the inside. A plurality of LEDs 22, 22,... Are arranged along the circumferential direction on the inner peripheral surface of each printed wiring board, and a power supply line (see FIG. (Not shown) extends from the output control unit 3 and is connected thereto. When assembling a plurality of boards in a three-dimensional manner as described above, the object to be inspected is illuminated with a desired illuminance distribution by adjusting the normal angle of the LED arrangement surface of each board and devising its three-dimensional shape. Becomes possible. A center hole 21a is formed in the holding frame 21 along the axis so as to penetrate the holding frame 21. As shown in FIG. Irradiation is performed, and a surface image of the inspection object 23 is obtained by an imaging device 24 such as a CCD image sensor arranged above the center hole 21a, and the inspection object 23 is inspected based on this image.
【００１４】尚、前記ＬＥＤ２２，２２，…としては、
単色に限らず、赤色、緑色、青色などの可視光波長域を
有するＬＥＤや、紫外線領域、赤外線領域などの各種発
光波長域を有するＬＥＤを組み合わせて使用しても良
く、各色毎にまたは発光波長域毎にセグメントを構成し
て、所望の発光色でもしくは所望の発光波長域で被検査
体を照明してもよい。The LEDs 22, 22,...
Not limited to a single color, an LED having a visible light wavelength range such as red, green, and blue, or an LED having various emission wavelength ranges such as an ultraviolet region and an infrared region may be used in combination. A segment may be formed for each region to illuminate the test object with a desired emission color or a desired emission wavelength range.
【００１５】また、制御電源１の調光レベル記憶部４に
おいては、ＬＥＤ光量の調節値すなわち調光値の複数個
から構成される発光パターンの記憶領域Ｐ1，…，Ｐ
m（ｍ：自然数）がｍ個用意されており、各発光パター
ンの記憶領域において更にＮ個の独立した調光値の記憶
領域Ｄ1，…，ＤNが設定されている。各々の調光値は、
ＬＥＤ照明装置２の各々のセグメントに対応付けられて
いる。また、このような調光レベル記憶部４には発光パ
ターンの瞬時の切り換えを実現すべくアクセス速度が高
速なＲＡＭを用い、このＲＡＭをバックアップ電源１２
で常時電力供給して調光値データの消失を防止するのが
好ましい。Further, in the dimming level storage section 4 of the control power supply 1, the light emitting pattern storage areas P 1 ,.
m (m: natural number) are prepared, and N independent light control value storage areas D 1 ,..., D N are set in the storage area of each light emission pattern. Each dimming value is
It is associated with each segment of the LED lighting device 2. In addition, a RAM having a high access speed is used for such a dimming level storage unit 4 in order to realize instantaneous switching of the light emission pattern.
It is preferable to always supply power to prevent loss of dimming value data.
【００１６】また、上記主制御部５は、ＣＰＵ５ａ、制
御プログラムが格納されたＥＥＰＲＯＭなどの書き換え
可能なＲＯＭ５ｂおよびＲＡＭ５ｃからなり、調光レベ
ル記憶部４や出力制御部３などの入出力信号を制御し、
調光レベル記憶部４を参照してそこに格納した発光パタ
ーンに基づき出力制御部３を制御することによりセグメ
ント毎にＬＥＤの発光量を指令する機能を有する。The main control unit 5 comprises a CPU 5a, a rewritable ROM 5b such as an EEPROM storing a control program, and a RAM 5c, and controls input / output signals of a dimming level storage unit 4 and an output control unit 3. And
It has a function of referring to the dimming level storage unit 4 and controlling the output control unit 3 based on the light emission pattern stored therein to instruct the light emission amount of the LED for each segment.
【００１７】そして、上記出力制御部３は、パルス幅変
調したＰＷＭ（Pulse Width Modulator）信号を発生す
るパルス幅制御回路３ａと、パワートランジスタやフォ
トカプラ素子、フォトＭＯＳリレーなどを備えたドライ
バ回路３ｂから構成されている。パルス幅制御回路３ａ
はＣＰＵ５ａからの指令信号によりＰＷＭ信号を発生
し、このＰＷＭ信号を受けたドライバ回路３ｂはパワー
トランジスタを駆動することにより、ＬＥＤ照明装置２
の各セグメントに個別に電力信号を供給する。このよう
に、ドライバ回路３ｂにパワートランジスタを用いてい
るため、その駆動時間が短時間で済み、ＣＰＵ５ａが指
令信号を発してから短時間で各セグメントへ電力信号を
供給することができる。また、特にＰＷＭ信号を用いる
ことで、ＬＥＤの発光に要する消費電力が低減し発熱量
が抑えられるから、ＬＥＤの寿命を延ばしたり、ＬＥＤ
の実装密度を高めることができる。The output control section 3 includes a pulse width control circuit 3a for generating a pulse width modulated PWM (Pulse Width Modulator) signal, and a driver circuit 3b including a power transistor, a photocoupler element, and a photo MOS relay. It is composed of Pulse width control circuit 3a
Generates a PWM signal in response to a command signal from the CPU 5a, and upon receiving the PWM signal, the driver circuit 3b drives a power transistor, thereby driving the LED lighting device 2
Are individually supplied with a power signal. As described above, since the power transistor is used for the driver circuit 3b, the driving time is short, and the power signal can be supplied to each segment in a short time after the CPU 5a issues the command signal. In particular, by using the PWM signal, the power consumption required for light emission of the LED is reduced and the amount of heat generated is suppressed, so that the life of the LED can be extended,
Mounting density can be increased.
【００１８】また、セグメントを選択し、選択したセグ
メントのＬＥＤの発光量を調節して調光値を得る調光手
段として、図１に示した入出力インターフェース６を通
じて接続される発光パターン設定器７，セグメント設定
器８，光量調節器９などがあり、これらにより各セグメ
ントのＬＥＤの発光量を確認しつつ調節したり、調節し
た発光量（調光値）を登録したり、登録した発光パター
ンを確認することができる。より具体的な実施例とし
て、図４に、入出力インターフェース６に接続される各
種設定器の一例を示して説明する。図４に示す設定パネ
ル３０には、電源スイッチ３１と、各種発光パターンの
設定状況を表示する表示器３２と、セグメントを構成す
る基板の調光値を設定する各種スイッチで構成される設
定部３３と、点灯，光量設定または消灯する基板の選択
を行う照明基板設定部３４と、上記した外部機器１０に
より外部制御可能にするか否かを選択するローカル／リ
モート切替スイッチ３５と、選択した当該発光パターン
で全ＬＥＤ照明基板の全点灯と全消灯を行うパターンオ
ン／オフスイッチ３６とが設けられている。As a dimming means for selecting a segment and adjusting a light emission amount of the LED of the selected segment to obtain a dimming value, a light emitting pattern setting unit 7 connected through the input / output interface 6 shown in FIG. , A segment setting unit 8, a light amount adjusting unit 9, etc., which are used to adjust while confirming the light emitting amount of the LED of each segment, register the adjusted light emitting amount (dimming value), and register the registered light emitting pattern. You can check. As a more specific embodiment, an example of various setting devices connected to the input / output interface 6 will be described with reference to FIG. The setting panel 30 shown in FIG. 4 includes a power switch 31, a display 32 for displaying the setting status of various light-emitting patterns, and a setting unit 33 including various switches for setting the dimming values of the boards constituting the segments. An illumination board setting unit 34 for setting a board to be turned on, a light quantity or to be turned off; a local / remote switch 35 for selecting whether or not to enable external control by the external device 10 described above; A pattern on / off switch 36 for turning on and off all the LED lighting boards in a pattern is provided.
【００１９】前記設定部３３では、登録スイッチ３７を
除く各種スイッチは上昇スイッチと下降スイッチとが一
組になったものである。例えば、発光パターン番号を設
定するパターン選択スイッチ３８ａ，３８ｂでは、上部
スイッチ３８ａを押すと発光パターン番号が上昇し、下
部スイッチ３８ｂを押すと発光パターン番号が下がる。
このように発光パターン番号を選択した後は、照明基板
設定スイッチ３９ａ，３９ｂで調光する照明基板番号を
設定する。そして、光量調節スイッチ４０ａ，４０ｂで
当該照明基板におけるＬＥＤの発光量を確認しつつ調節
する。このように各照明基板を順次選択して、ＬＥＤの
発光量を確認しつつ調節することで、所望の照度分布を
得ることが可能となる。尚、ＬＥＤの発光量は１２８階
調で調節することが可能である。In the setting section 33, various switches except the registration switch 37 are a set of an up switch and a down switch. For example, in the pattern selection switches 38a and 38b for setting the light emission pattern number, when the upper switch 38a is pressed, the light emission pattern number increases, and when the lower switch 38b is pressed, the light emission pattern number decreases.
After the selection of the light emitting pattern number, the lighting board number to be adjusted is set by the lighting board setting switches 39a and 39b. The light amount adjustment switches 40a and 40b adjust the light emission amount of the LED on the lighting board while confirming the light emission amount. As described above, by sequentially selecting each of the illumination substrates and adjusting while confirming the light emission amount of the LED, it is possible to obtain a desired illuminance distribution. The light emission amount of the LED can be adjusted in 128 gradations.
【００２０】全ての照明基板の発光量すなわち調光値を
設定した後は、上記パターンオン／オフスイッチ３６を
押して、ＬＥＤ照明装置を当該発光パターンで点灯し照
度分布を確認することができる。このとき所望の照度分
布が得られなければ、照明基板毎に再度ＬＥＤの発光量
を調節する。そして、所望の照度分布を得ることができ
れば、調光値データ登録スイッチ３７を押して、上記調
光レベル記憶部４の当該発光パターン番号の記憶領域に
調光値を記憶させる。After setting the light emission amounts, that is, the dimming values, of all the lighting boards, the pattern on / off switch 36 is pressed to turn on the LED lighting device in the light emitting pattern and check the illuminance distribution. At this time, if a desired illuminance distribution is not obtained, the light emission amount of the LED is adjusted again for each lighting board. Then, if a desired illuminance distribution can be obtained, the dimming value data registration switch 37 is pressed, and the dimming value is stored in the light emitting pattern number storage area of the dimming level storage unit 4.
【００２１】また、照明基板設定部３４では、照明基板
番号１〜１６に対応したスイッチＳＷ１，ＳＷ２，…が
並設されており、スイッチを一度押すと、当該発光パタ
ーン番号の設定光量で照明基板のＬＥＤが点灯し、再度
同スイッチを押すと上記設定部３３で当該照明基板のＬ
ＥＤの光量調節が可能となる。尚、図３に示したＬＥＤ
照明装置では、照明基板が１２個あるので、照明基板番
号１〜１２に対応したスイッチを利用できる。In the lighting board setting section 34, switches SW1, SW2,... Corresponding to the lighting board numbers 1 to 16 are arranged in parallel. LED is turned on and the switch is pressed again.
The light intensity of the ED can be adjusted. The LED shown in FIG.
Since the lighting device has twelve lighting boards, switches corresponding to lighting board numbers 1 to 12 can be used.
【００２２】そして、以上の設定作業中、上記表示器３
２では、設定している照明基板番号や光量などの数値が
表示される。During the above setting operation, the display 3
In 2, numerical values such as the set illumination board number and light amount are displayed.
【００２３】ところで、上記ローカル／リモート切替ス
イッチ３５をオンにして外部機器１０による制御を可能
とした場合、制御電源１が外部機器１０からインターフ
ェース１１を通して発光パターン１，発光パターン２，
…の指示信号を順次受けると、ＣＰＵ５ａは、調光レベ
ル記憶部４を参照して前記発光パターン１，発光パター
ン２，…に合致する発光パターンを見出し、当該発光パ
ターンに対応する調光値の組合せを呼び出して出力制御
部３へ発光パターン１に基づく指令信号を発する。次い
で、出力制御部３が当該発光パターンに基づく電力信号
をＬＥＤ照明装置２の各セグメントに供給し、ＬＥＤ照
明装置２は当該発光パターンで被検査体を照明する。次
いで、ＣＰＵ５ａは、指示された所定時間経過後、発光
パターン２に基づく指令信号を出力制御部３へ発し、被
検査体は発光パターン２で所定時間照明される。このよ
うに、本実施例の制御電源１は、外部機器１０が指示し
た発光パターン１，発光パターン２，…を順次切り換え
てＬＥＤ照明装置２に電力信号を供給できる。また、制
御電源内部に調光レベル記憶部４を備えているから、外
部機器から調光値データを転送するのに要する転送時間
に比べて、調光値データの呼び出し時間は短時間で済
み、発光パターンの切り換えを数ミリ秒以下の短時間で
実行することが可能となる。When the local / remote switch 35 is turned on to enable control by the external device 10, the control power supply 1 transmits the light emission pattern 1, the light emission pattern 2,
When the CPU 5a receives the instruction signals in sequence, the CPU 5a refers to the dimming level storage unit 4 to find a light emitting pattern that matches the light emitting pattern 1, the light emitting pattern 2,. The combination is called and a command signal based on the light emission pattern 1 is issued to the output control unit 3. Next, the output control unit 3 supplies a power signal based on the light emission pattern to each segment of the LED lighting device 2, and the LED lighting device 2 illuminates the inspection object with the light emission pattern. Next, the CPU 5a issues a command signal based on the light emission pattern 2 to the output control unit 3 after the instructed predetermined time elapses, and the subject is illuminated with the light emission pattern 2 for a predetermined time. As described above, the control power supply 1 of the present embodiment can supply the power signal to the LED lighting device 2 by sequentially switching the light emission pattern 1, the light emission pattern 2,... Further, since the dimming level storage unit 4 is provided in the control power supply, the calling time of the dimming value data is shorter than the transfer time required to transfer the dimming value data from the external device, Switching of the light emission pattern can be performed in a short time of several milliseconds or less.
【００２４】次に、図２に、上記制御電源１を用いた典
型的な画像検査システムを例示して説明する。この画像
検査システムは、上記制御電源１と、図３に示したもの
と同種のＬＥＤ照明装置２と、ＬＥＤ照明装置２の中心
孔２１ａを通して被検査体２３を撮像する撮像装置２４
と、被検査体２３の画像を表示する画像表示装置２５
と、被検査体２３の画像データが入力するとその画像デ
ータの二次処理を行うシステムコントローラ２６と、か
ら構成される。被検査体表面の画像データは、画像表示
装置２５に出力されて目視で確認可能であり、その画像
を確認しつつ上記した設定パネル３０で所望の照度分布
に調節するといういわゆるティーチング作業が可能とな
る。Next, a typical image inspection system using the control power supply 1 will be described with reference to FIG. This image inspection system includes the control power supply 1, an LED illumination device 2 of the same type as that shown in FIG. 3, and an imaging device 24 for imaging an inspection object 23 through a center hole 21 a of the LED illumination device 2.
And an image display device 25 for displaying an image of the test object 23
And a system controller 26 that, when image data of the object 23 is input, performs secondary processing on the image data. The image data of the surface of the object to be inspected is output to the image display device 25 and can be visually checked. It is possible to perform a so-called teaching operation of adjusting the illuminance distribution to a desired one with the setting panel 30 while checking the image. Become.
【００２５】また、各セグメントのＬＥＤの発光量を調
節して調光値を得る調光手段として、外部機器であるシ
ステムコントローラ２６を利用することも可能である。
すなわち、システムコントローラ２６は、シーケンサや
コンピュータなどから構成され、制御電源１のインター
フェース１１に接続されている。このようなシステムコ
ントローラ２６は、撮像装置２４から入力した画像デー
タを画像処理し、この画像処理データが予め記憶されて
いる基準照度分布に一致しない場合、照度分布を修正す
べく、補正した調光値データを上記制御電源１に伝送指
示し、調光レベル記憶部４における当該調光値データを
書き換えたり、新規の発光パターンとして記憶させるこ
とができる。It is also possible to use a system controller 26, which is an external device, as dimming means for adjusting the amount of light emitted from the LED of each segment to obtain a dimming value.
That is, the system controller 26 includes a sequencer, a computer, and the like, and is connected to the interface 11 of the control power supply 1. Such a system controller 26 performs image processing on image data input from the imaging device 24, and when the image processing data does not match a pre-stored reference illuminance distribution, the corrected dimming is performed to correct the illuminance distribution. By instructing the control power supply 1 to transmit the value data, the dimming value data in the dimming level storage unit 4 can be rewritten or stored as a new light emission pattern.
【００２６】[0026]
【発明の効果】以上の如く、請求項１に係る制御電源に
よれば、ＬＥＤ照明装置の各セグメントに対応する調光
値を設定し格納する調光レベル記憶部と、前記調光値に
従って前記セグメントの各々に対してＬＥＤの発光量を
制御する出力制御部と、前記調光レベル記憶部および出
力制御部を制御する主制御部と、を備えているから、セ
グメント毎にＬＥＤの発光量を変化させて所望の照度分
布に調整しこれを得ることが可能となる。As described above, according to the control power supply of the first aspect, the dimming level storage unit for setting and storing the dimming value corresponding to each segment of the LED lighting device, An output control unit that controls the light emission amount of the LED for each of the segments, and a main control unit that controls the dimming level storage unit and the output control unit. It is possible to obtain a desired illuminance distribution by changing the illuminance distribution.
【００２７】また、請求項２に係る制御電源は、各セグ
メントを選択し、選択したセグメントのＬＥＤの発光量
を照度分布を最適化するように調節して調光値を得る調
光手段と、前記調光値の組合せを前記調光レベル記憶部
に記憶させる調光値記憶手段と、を備えているから、セ
グメント毎のＬＥＤ発光量を調節して照度分布を簡易に
最適化でき、最適化した照度分布に対応する調光値の組
合せを記憶し、記憶した調光値の組合せを参照利用する
ことができ、もって制御電源の操作性が向上する。Further, the control power supply according to a second aspect of the present invention includes a dimming means for selecting each segment and adjusting a light emission amount of the LED of the selected segment so as to optimize the illuminance distribution, thereby obtaining a dimming value; And a dimming value storage unit for storing the dimming value combination in the dimming level storage unit, so that the illuminance distribution can be easily optimized by adjusting the LED light emission amount for each segment. The combination of the dimming values corresponding to the obtained illuminance distribution can be stored, and the stored combination of the dimming values can be used for reference, thereby improving the operability of the control power supply.
【００２８】また、請求項３に係る制御電源によれば、
調光レベル記憶部としてバックアップ電源により電力供
給されたＲＡＭを用いるので、外部コントローラから調
光値データを転送する場合に比べ、調光値データの呼び
出し時間が短縮し、ＬＥＤの発光パターンの切換時間が
大幅に短縮するから、複数の発光パターンを瞬時に切り
換えて実行できるため、検査効率が向上する。また、バ
ックアップ電源を用いているため、装置電源をオフにし
ても調光値データを消失させずに保持することが可能で
ある。Further, according to the control power supply of claim 3,
Since the RAM supplied with the backup power supply is used as the dimming level storage unit, the calling time of the dimming value data is reduced as compared with the case where the dimming value data is transferred from the external controller, and the LED light emission pattern switching time is reduced. Is greatly shortened, and a plurality of light emission patterns can be instantaneously switched and executed, so that inspection efficiency is improved. Further, since the backup power supply is used, it is possible to retain the light control value data without losing it even when the apparatus power supply is turned off.
【００２９】また、請求項４に係る制御電源によれば、
出力制御部が各セグメントへの電力信号をパルス幅変調
させるパルス幅変調回路を有するので、ＬＥＤの発光に
要する消費電力を低減させることができる。Further, according to the control power supply of claim 4,
Since the output control unit has the pulse width modulation circuit that performs pulse width modulation on the power signal to each segment, it is possible to reduce power consumption required for light emission of the LED.
【００３０】また、請求項５および請求項６に係る制御
電源によれば、前記出力制御部が、パワートランジスタ
に代表される電力用半導体を備えたドライバ回路を有す
るので、低電力で電力信号のオン／オフ動作ができ、発
光パターンを高速に切り換えることが可能となる。Further, according to the control power supply according to the fifth and sixth aspects, since the output control section has the driver circuit including the power semiconductor represented by the power transistor, the power signal of the power signal can be reduced at low power. On / off operation can be performed, and the light emission pattern can be switched at high speed.
【図１】本発明に係る照明装置の制御電源の一実施例を
示す概略ブロック図である。FIG. 1 is a schematic block diagram showing one embodiment of a control power supply of a lighting device according to the present invention.
【図２】図１に示した制御電源を用いた典型的な画像検
査システムの一例を示す概略図である。FIG. 2 is a schematic diagram showing an example of a typical image inspection system using the control power supply shown in FIG.
【図３】本発明に係る制御電源と共に使用するＬＥＤ照
明装置の一実施例を示す概略図であり、（ａ）は、ＬＥ
Ｄ照明装置の底面図、（ｂ）は、そのＡ−Ａ断面図であ
る。FIG. 3 is a schematic view showing one embodiment of an LED lighting device used together with a control power supply according to the present invention.
FIG. 4B is a bottom view of the D lighting device, and FIG.
【図４】本発明に係る制御電源の設定パネルの一例を示
す概略図である。FIG. 4 is a schematic view showing an example of a control power supply setting panel according to the present invention.
１ 制御電源 ２ ＬＥＤ照明装置 ３ 出力制御部 ３ａ パルス幅制御回路 ３ｂ ドライバ回路 ４ 調光レベル記憶部 ５ 主制御部 ５ａ ＣＰＵ ５ｂ 書換可能なＲＯＭ ５ｃ ＲＡＭ ６ 入出力インターフェース ７ パターン設定器 ８ セグメント設定器 ９ 光量調節器 １０ 外部機器 １１ インターフェース １２ バックアップ電源 ２０Ａ〜２０Ｌ プリント配線基板 ２１ 保持枠 ２１ａ 中心孔 ２２ ＬＥＤ ２３ 被検査体 ２４ 撮像装置 ２５ 画像表示装置 ２６ システムコントローラ ３０ 設定パネル ３１ 電源スイッチ ３２ 表示器 ３３ 設定部 ３４ 照明基板設定部 ３５ ローカル／リモート切替スイッチ ３６ パターンオン／オフスイッチ ３７ 登録スイッチ ３８ａ，３８ｂ パターン選択スイッチ ３９ａ，３９ｂ 照明基板設定スイッチ ４０ａ，４０ｂ 光量調節スイッチ Reference Signs List 1 control power supply 2 LED lighting device 3 output control unit 3a pulse width control circuit 3b driver circuit 4 dimming level storage unit 5 main control unit 5a CPU 5b rewritable ROM 5c RAM 6 input / output interface 7 pattern setting unit 8 segment setting unit Reference Signs List 9 light amount controller 10 external device 11 interface 12 backup power supply 20A to 20L printed wiring board 21 holding frame 21a center hole 22 LED 23 inspected object 24 imaging device 25 image display device 26 system controller 30 setting panel 31 power switch 32 display device 33 Setting unit 34 Lighting board setting unit 35 Local / remote changeover switch 36 Pattern on / off switch 37 Registration switch 38a, 38b Pattern selection switch 39a, 39b Lighting board setting switch 40a, 40b Light intensity adjustment switch
Claims (6)
メントを立体的に配設し、該セグメントの各々にＬＥＤ
を設けてなるＬＥＤ照明装置を用意し、 前記ＬＥＤ照明装置の各セグメントに対応する調光値を
設定し格納する調光レベル記憶部と、 該調光レベル記憶部に格納した調光値に従って前記セグ
メントの各々に対してＬＥＤの発光量を制御する出力制
御部と、 前記調光レベル記憶部および出力制御部を制御する主制
御部と、を備えることにより、前記セグメント毎にＬＥ
Ｄの発光量を変化させ被検査体への照度分布を調整せし
めることを特徴とする照明装置の制御電源。1. A three-dimensional arrangement of a plurality of segments which are independently supplied with power, and each of the segments has an LED.
Preparing an LED lighting device provided with: a dimming level storage unit for setting and storing a dimming value corresponding to each segment of the LED lighting device; and a dimming value stored in the dimming level storage unit. By providing an output control unit for controlling the light emission amount of the LED for each of the segments, and a main control unit for controlling the dimming level storage unit and the output control unit, the LE for each segment is provided.
A control power supply for a lighting device, characterized in that a light emission amount of D is changed to adjust an illuminance distribution on a test object.
ントのＬＥＤの発光量を照度分布を最適化するように調
節して調光値を得る調光手段と、前記調光値の組合せを
前記調光レベル記憶部に記憶させる調光値記憶手段と、
を備えてなる請求項１記載の照明装置の制御電源。2. A dimming means for selecting each segment and adjusting a light emission amount of an LED of the selected segment so as to optimize an illuminance distribution to obtain a dimming value; Light control value storage means for storing in the light level storage unit;
The control power supply of the lighting device according to claim 1, further comprising:
源により電力供給されたＲＡＭを用いてなる請求項１ま
たは２記載の照明装置の制御電源。3. The control power supply for an illumination device according to claim 1, wherein a RAM supplied with power from a backup power supply is used as the dimming level storage unit.
信号をパルス幅変調させるパルス幅変調回路を有してな
る請求項１〜３の何れか１項に記載の照明装置の制御電
源。4. The control power supply of the lighting device according to claim 1, wherein the output control unit includes a pulse width modulation circuit that performs pulse width modulation on a power signal to each segment.
ドライバ回路を有してなる請求項１〜４の何れか１項に
記載の照明装置の制御電源。5. The control power supply for a lighting device according to claim 1, wherein the output control unit includes a driver circuit including a power semiconductor.
スタを用いてなる請求項５記載の照明装置の制御電源。6. The control power supply for a lighting device according to claim 5, wherein a power transistor is used as the power semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33989299A JP4230628B2 (en) | 1999-11-30 | 1999-11-30 | Control power supply for lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33989299A JP4230628B2 (en) | 1999-11-30 | 1999-11-30 | Control power supply for lighting equipment |
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| JP2001153808A true JP2001153808A (en) | 2001-06-08 |
| JP4230628B2 JP4230628B2 (en) | 2009-02-25 |
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