JP2003295270A - Illuminator for photographing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To build an illuminator for photographing equipment in the photographing equipment. <P>SOLUTION: A light emission part is composed of an LED and made small- sized to arrange the light emission part at the outer circumferential part of a lens for photography of the photographing equipment for macrophotography, and a circuit for making the light emission part illuminate is built in the photographing equipment. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a photographing device that illuminates a subject when a macro image is photographed by a photographing device such as a camera.

[0002]

2. Description of the Related Art Conventionally, when a macro image is taken by a camera or the like, a ring-shaped illumination device is mounted on the outer peripheral portion of a photographing lens, and the subject is illuminated by the ring-shaped illumination device for photography.

[0003]

However, the conventional ring-shaped illuminating device for macro photography is large and cannot be built in the camera. Therefore, it is necessary to mount the illuminator for macro photography one by one when performing macro photography, which is convenient. Was bad.

The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a lighting device for a photographing device which can be built in the photographing device and has good operability. Is.

[0005]

The present invention for solving the problems of the present invention provides a lighting device for a photographing device, which is arranged close to an outer peripheral portion of a photographing lens of a photographing device and illuminates an object during macro photographing. A plurality of light emitting diodes arranged in a ring shape on the outer periphery of the photographing lens, a booster circuit for boosting and rectifying the battery power of the photographing device side, and a boosted voltage output from the booster circuit. A lighting circuit for supplying and stopping the supply to a plurality of light emitting diodes is provided in the photographing device.

According to the present invention, when the battery power of the photographing device is supplied to the booster circuit, the battery voltage is boosted, and the boosted voltage is supplied to the plurality of light emitting diodes through the lighting circuit. The light emitting diode lights up in a ring shape on the outer peripheral portion of the photographing lens of the photographing device.

According to a second aspect of the present invention, in the first aspect, the battery power on the side of the photographing device is supplied to the booster circuit.
A switch circuit for stopping the supply is provided, and the lighting circuit is turned on / off in synchronization with turning on / off of the switch circuit.

According to a third aspect of the present invention, in the second aspect, the switch circuit is turned on / off according to a mode of the photographing device by a control circuit on the photographing device side.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a configuration example of a camera having a built-in illumination device for a photographing device according to an embodiment of the present invention. The illumination device for a photographing device has an LED light emitting section 3 in which a plurality of LEDs (light emitting diodes) 31 arranged in a ring shape are arranged on an outer peripheral portion of a photographing lens 2 of a camera 1.

FIG. 2 is a block diagram showing an example of the structure of a lighting device for photographing equipment built in the camera 1 shown in FIG. The illumination device for a photographing device includes an LED light emitting section 3, a lighting circuit 4 for lighting the LED light emitting section 3, and a boosting circuit 5 for generating a voltage for causing the LED light emitting section 3 to emit light.
And a switch circuit 6 for turning on and off the booster circuit 5,
Power is supplied from the battery 7 on the camera side to the booster circuit 5 through the switch circuit 6. The switch circuit 6 is controlled by a control circuit (microcomputer or the like) 8 on the camera side.

FIG. 3 is a circuit diagram showing a detailed configuration example of the functional blocks shown in FIG. The LED light emitting unit 3 is formed by connecting in parallel two circuits in which a plurality of LEDs 31 are connected in series. Resistor R1 inserted in the series circuit
Is a current limiting resistor. The lighting circuit 4 includes an NPN transistor 41, a capacitor C1 that determines the time constant of the base circuit of the transistor 41, and a resistor R2. The booster circuit 5 includes a booster inductor L, a switching MOS transistor 51, a switching control circuit 52 connected to the gate of the MOS transistor 51 to perform switching control, a voltage stabilizing capacitor C2, and a rectified voltage. It includes a smoothing capacitor C3, a rectifying diode D that rectifies the boosted voltage, and voltage dividing resistors R3 and R4 that divide the boosted voltage.

Next, the operation of this embodiment will be described. When the camera 1 is set to the macro photography mode, the control circuit 8 such as a microcomputer on the camera side shown in FIG.
Is turned on to supply power from the battery 7 on the camera side to the booster circuit 5. The booster circuit 5 boosts the supplied battery voltage. This boosted voltage (30V) is passed through the lighting circuit 4 to LE.
It is supplied to the D light emitting unit 3, and the LED light emitting unit 3 is turned on to illuminate a subject (not shown).

When the switch circuit 6 is turned on, the lighting circuit 4 is also turned on in synchronization with this. When the camera 1 is returned from the macro shooting mode to the normal mode, the control circuit 8 turns off the switch circuit 6, the lighting circuit 4 is also turned off in synchronization with this, and the LED light emitting section 3 is turned off.

Next, the operation of each circuit described above will be described in more detail with reference to FIG. When the switch circuit 6 is turned on, the transistor 41 is turned on in synchronization with it. The voltage from the battery 7 is supplied to the switching control circuit 52, and the switching control circuit 52 causes the transistor 51 to start switching. As a result, a high voltage is generated in the inductor L, the high voltage is rectified by the rectifier diode D, and further smoothed by the capacitor C3 to obtain 30V.
It becomes a boosted voltage of about a degree. This boosted voltage is applied to the LED light emitting section 3
Is applied to the LEDs 31 constituting the LED via the resistor R1 to light these LEDs 31.

Here, the boosted voltage is divided by the resistors R3 and R4, and the divided voltage is the switching control circuit 52.
Be fed back to. Therefore, the switching control circuit 52 controls the switching of the transistor 51 so that the boosted voltage becomes constant. This allows the LED
The light emitting unit 3 is stably turned on with a predetermined amount of light.

According to the present embodiment, the light-emitting portion of the illumination device for photographing equipment is made up of LEDs to make it compact,
Thereby, the illumination device for a photographing device can be built in the camera 1, and the LED light emitting portion 3 can be arranged on the outer peripheral portion of the photographing lens 2. Further, it is necessary to turn on and off the LED light emitting unit 3 of the illuminating device for the photographing device in conjunction with the operation on the camera 1 side, and to attach the illuminating device for the photographing device to the camera 1 one by one during macro photography. Therefore, the operability during macro photography can be significantly improved. Furthermore,
Since the light emitting section 3 is an LED, it is possible to save electric power and to remarkably extend its life.

The present invention is not limited to the above-described embodiments, and can be carried out in various other modes in specific configurations, functions, actions and effects without departing from the scope of the invention. it can. For example, the switch circuit 6 is turned on / off by the control section 8 on the camera side, but may be turned on / off by a manual switch. Also,
Although a camera has been described as an example of the macro photography device in the above-described embodiment, the same effect can be obtained by incorporating the illumination device for a photography device of the present invention in an information terminal such as a mobile phone having a photography function.

[0018]

As described above in detail, according to the present invention, the light emitting unit for macro photography is composed of LEDs to be miniaturized, so that the illumination device for photography equipment can be built in the photography equipment. It is possible to improve its operability.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration example of a camera having a built-in illumination device for a photographing device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of a lighting device for a photographing device incorporated in the camera shown in FIG.

3 is a circuit diagram showing a detailed configuration example of a functional block shown in FIG.

[Explanation of symbols]

3 LED light emitting part 4 lighting circuit 5 Booster circuit 6 switch circuit 7 batteries 8 control circuit

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[Procedure amendment]

[Submission date] October 4, 2002 (2002.10.
4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a photographing device that illuminates a subject with monochromatic or various color light emitting diodes when macro photographing is performed by the photographing device such as a camera.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

[0003]

However, the conventional ring-shaped illuminating device for macro photography is large and cannot be built in the camera. Therefore, it is necessary to mount the illuminator for macro photography one by one when performing macro photography, which is convenient. Was bad. Moreover, since it was a single color, it was not possible to direct the mixed light of the colors to the subject, and it was not possible to respond to the required various uses of colors.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

The present invention has been made in order to solve the above-mentioned conventional problems, and the purpose thereof is to be able to be incorporated in a photographing device, to have good operability, and to be able to use various colors. An object is to provide a lighting device for an imaging device.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

The present invention is not limited to the above-described embodiments, and can be carried out in various other modes in specific configurations, functions, actions and effects without departing from the scope of the invention. it can. For example, the switch circuit 6 is turned on / off by the control section 8 on the camera side, but may be turned on / off by a manual switch. Also,
Although a camera has been described as an example of the macro photography device in the above-described embodiment, the same effect can be obtained by incorporating the illumination device for a photography device of the present invention in an information terminal such as a mobile phone having a photography function. Further, the light emitting diode can emit a mixed color for a subject by using each color, and can emit a single color of various colors when required, and a mixed color when a mixed color of each color is desired. It has the effect of being able to emit colors.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

[0018]

As described above in detail, according to the present invention, the light emitting unit for macro photography is composed of LEDs to be miniaturized, so that the illumination device for photography equipment can be built in the photography equipment. It is possible to provide an illuminating device for a photographing device, which is capable of improving the operability thereof, and further, in the case where a single color or a mixed color is required for a subject, it is possible to sufficiently meet this demand.

Claims (3)

[Claims] 1. An illuminating device for a photographing device, which is arranged close to an outer peripheral portion of a photographing lens of a photographing device and illuminates an object during macro photographing, wherein a plurality of ring-shaped arrangements are arranged on the outer peripheral portion of the photographing lens. A light emitting diode; a boosting circuit for boosting and rectifying the battery power source on the side of the photographing device; a lighting circuit for supplying and stopping the boosted voltage output from the boosting circuit to the plurality of light emitting diodes; A lighting device for a photographing device, which is provided in the device. 2. A switch circuit for supplying and stopping the battery power on the side of the photographing device to the booster circuit is provided, and the lighting circuit is turned on in synchronization with turning on and off of the switch circuit.
The lighting device for a photographing device according to claim 1, wherein the lighting device is turned off. 3. The illumination device for a photographing device according to claim 2, wherein the switch circuit is turned on / off according to a mode of the photographing device by a control circuit on the photographing device side.