JP2006337739A - Illuminating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illuminating apparatus, capable of using the same light condensing lens for plural kinds of LED light sources, and capable of switching the plural compact light sources, by constituting the apparatus where small-sized LEDs are used, with the LEDs being movable to positions corresponding to the light condensing lens. <P>SOLUTION: In the illuminating apparatus freely attachably/detachably loaded to an imaging apparatus, the illuminating apparatus includes; the light condensing lens; a first light source group, mounted on a printed circuit board and arranged in a position corresponding to the condensing lens; a second light source group, mounted near the first light source group on the printed circuit board so as to emit light whose hue is different from that of the first light source group; and a light source switching means, capable of switching either of the first light source group or the second light source group to the position corresponding to the light condensing lens. The plurality of light sources are switched selectively and set into active state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an illuminating device that is attached to an imaging device such as a video camera and can be used by switching a plurality of types of light sources having different color tones.

The following are known as illumination devices to be mounted on the imaging device. Japanese Patent Application Laid-Open No. H10-228667 discloses a lamp provided with a plurality of lamps in order to improve the reliability of the lamp or to obtain a special lighting effect in photographing. This embodiment has two types of lamps, a main lamp and a spare lamp, and is movable between a basic position where the main lamp illuminates by a position switching mechanism and a spare position where the spare lamp illuminates. A lamp holder is described. Japanese Patent Application Laid-Open No. 2004-228561 discloses a device that includes a halogen lamp for visible light photography and an infrared light emitting unit for night vision photography, and switches the lighting state of the light source by switching electrical connection.
JP-A-10-269833 Japanese Patent Laid-Open No. 11-252424

  The apparatus as described above collects light emitted from a lamp by using a lens or a reflector and irradiates the light in front of the apparatus. However, when a plurality of types of lamps are switchably arranged in the lighting device, it is necessary to provide a reflector or the like for each lamp, and such a reflector is generally larger than the lamp light emitting unit, and thus the lighting device. The whole will be large.

  In addition, a method in which a plurality of lamps are provided in one reflector without providing a reflector for each lamp, and each lamp is electrically switched so as to be lit is not provided with a reflector in each lamp. Efficient for downsizing, but because each lamp has a different light emitting position, it is difficult to irradiate in the same direction no matter which lamp emits light, and a lens for diffusing and condensing light A group or specially shaped diffusion plate is required, which is not efficient because it takes time.

  The present invention is an illumination device that is detachably attached to an imaging device, and includes a condenser lens, a first light source group that is mounted on a printed circuit board and disposed at a position corresponding to the condenser lens, A second light source group mounted in the vicinity of the first light source group on the printed circuit board and emitting light in a color tone different from that of the first light source group; the first light source group and the second light source group; A light source switching means capable of switching any one of the light source to a position corresponding to the condensing lens, and a plurality of light sources can be selectively switched to be used.

  According to the present invention, the same condensing lens is used in a plurality of types of LED light sources by using a small-sized light emitting diode (hereinafter referred to as LED) mounted at high density so as to be movable to a position corresponding to the condensing lens. Therefore, it is possible to provide a lighting device that can switch a plurality of small light sources.

  Hereinafter, the illumination device (video light device) of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an external perspective view of a configuration of an embodiment of the video light device according to the present embodiment. FIG. 2 is an exploded perspective view showing the structure of the video light shown in FIG. 1 and 2, reference numeral 1 denotes a video light body, which includes a front cover 11 and a rear cover 12. 2 is a condensing lens, 31 is a first group of white LEDs, 32 is a second group of white LEDs having a different color from the first group of white LEDs 31, 4 is a printed circuit board, 5 is an LED selector switch, and 6 is an LED. A lighting circuit board, 7 is a light on / off switch, 8 is an accessory shoe, and 9 is a battery pack.

  The first group of white LEDs 31 and the second group of white LEDs 32 are mounted on the printed circuit board 4. The first group of white LEDs 31 and the second group of white LEDs 32 are slid in the horizontal direction by the LED changeover switch 5. The position can be physically switched so that either one of the group of white LEDs 31 and the second group of white LEDs 32 is selectively arranged. Here, the first group of white LEDs 31 and the second group of white LEDs 32 are arranged alternately and alternately.

  The LED lighting circuit board 6 is fixed to the rear cover 12 inside the video light body. In the video light of this embodiment, the LED lighting circuit board 6 and the printed circuit board 4 are electrically connected by a cable (not shown), and power is supplied from the battery pack 9 by turning on the lighting / extinguishing switch 7. The condensing lenses of the first group of white LEDs 31 and the second group of white LEDs 32 mounted on the electrically connected printed circuit board 4 that are controlled to light the LEDs by the LED lighting circuit board 6. The white LED arranged at a position facing 2 is caused to emit light, and the light is condensed by the condenser lens 2 and irradiated to the front of the video light main body.

  Next, the operation of this embodiment will be described.

  FIG. 3 shows a cross-sectional view of a state in which the first group of white LEDs 31 is disposed at a position facing the condenser lens 2. As shown in this figure, among the white LEDs on the printed circuit board 4, the first group of LEDs 31 is arranged with the light emitting surface facing the condenser lens 2. Power is supplied from the battery pack 9, power is controlled by the LED lighting circuit board 6, the first group of white LEDs 31 emit light, is collected by the condenser lens 2, and is irradiated forward of the video light. At this time, power is not supplied to the second group of white LEDs 32 and the light is turned off.

  Next, FIG. 4 shows a cross-sectional view of the state in which the second group of white LEDs 32 is arranged at a position facing the condenser lens 2 by the LED changeover switch 5. As shown in this figure, among the LEDs on the printed circuit board 4, the second group of white LEDs 32 is arranged with the light emitting surface facing the condenser lens 2. Power is supplied from the battery pack 9 and the power is controlled by the LED lighting circuit board 6. The second group of white LEDs 32 emit light, is condensed by the condenser lens 2, and is irradiated forward of the video light. At this time, power is not supplied to the first group of white LEDs 31 and they are turned off.

The perspective view which shows the external appearance of the video light in the Example of this invention. The disassembled perspective view which shows the structure of the video light in the Example of this invention. The fragmentary sectional view when arrange | positioning the white LED of a 1st group in the position facing a condensing lens. The fragmentary sectional view when arrange | positioning white LED of a 2nd group in the position facing a condensing lens.

Explanation of symbols

1 Video Light Body 11 Front Cover 12 Rear Cover 2 Condensing Lens 31 First Group White LED
32 Second group of white LEDs
4 Printed circuit board 5 LED selector switch 6 LED lighting circuit board 7 ON / OFF switch

Claims (5)

  An illumination device that is detachably attached to an imaging device, comprising a condensing lens, a first light source group mounted on a printed circuit board and disposed at a position corresponding to the condensing lens, and the printed circuit board A second light source group that is mounted in the vicinity of the first light source group and emits light in a color tone different from that of the first light source group; and one of the first light source group and the second light source group Has a light source switching means capable of switching to a position corresponding to the condenser lens, and a plurality of light sources can be selectively switched to be used.   The lighting device according to claim 1, wherein the first light source group and the second light source group are arranged alternately and alternately.   The lighting device according to claim 1, wherein at least one of the first light source group and the second light source group is a white LED.   4. The lighting device according to claim 1, wherein at least one of the first light source group and the second light source group is a white LED having a color tone different from that of the other light source groups. 5.   5. The illumination device according to claim 1, wherein the light source switching unit is configured to slide one of the plurality of light source groups or the condenser lens.

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