JP2005100723A - Led type light source device and spotlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED light source device causing no irradiation displacement even at a point where no correct focus is obtained or when blurring is applied. <P>SOLUTION: A first reflecting mirror 14 is provided for condensing light from a plurality of LEDs 13 mounted on an LED substrate 12 toward a focal point F, and a second reflecting mirror 16 is provided to face toward the first reflecting mirror 14. The second reflecting mirror 16 has the focal point F at the same position as the focal point of the first reflecting mirror 14, and reflects the light reflected by the first reflecting mirror 14 to cause color mixture to thereby obtain parallel light. The parallel light reflected by the second reflecting mirror 16 is then emitted from an opening 15 provided at a center portion of the first reflecting mirror 14. As a result, no irradiation displacement occurs even at a point where no correct focus is obtained or when blurring is applied. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an LED light source device using a light emitting diode (LED) and a spotlight.

  Generally, halogen light bulbs and discharge lamps are used as light sources for spotlights used for lighting in theaters and television studios. This is because the light emitting portion of the light source is sufficiently small with respect to the lens, and the lens can sufficiently capture the light from the light source and can irradiate efficiently. In a spotlight using a halogen bulb or a discharge lamp, the filament is heated as high as possible to generate light, so that not only visible light but also a lot of heat rays are emitted. Therefore, iron or light metal plates that can withstand heat are used for the housing that houses the light source, and heat-resistant glass is also used for the lens, making the spotlight heavier and requiring effort to move the spotlight. Yes.

Therefore, a large number of LEDs are arranged as a light source on the curved surface, and the irradiation beam of each LED is condensed at one point to constitute a virtual single point light source unit. The positional relationship between the light source unit and the lens is variable to be irradiated Spotlights that change the illuminance and illuminance distribution of the surface have been developed.
Japanese Patent Laid-Open No. 2001-307502 (FIGS. 2 and 3)

  However, in Japanese Patent Laid-Open No. 2001-307502, the colors are mixed at the point of focus and no deviation occurs in the irradiation area of each LED. However, the deviation of the illumination occurs when there is no focus. This is because light from each LED condensed at one point is directly emitted to the irradiated surface. For example, when focusing on a person, the illumination of each LED shifts on the background wall and the like, resulting in an irradiation shift. In some cases, the light beam is intentionally blurred using a spotlight, but this also causes an irradiation deviation.

  An object of the present invention is to provide an LED-type light source device and a spotlight that do not cause an irradiation deviation even when it is out of focus or blurred.

  An LED light source device according to a first aspect of the present invention is an LED substrate on which a plurality of LEDs are attached; and a first reflection for condensing the light of the plurality of LEDs attached to the LED substrate toward a focal point. A second mirror that has a focal point at the same position as the focal point of the first reflecting mirror and is disposed on the opposite side of the first reflecting mirror to reflect the reflected light of the first reflecting mirror to be parallel light; A reflection mirror; and an opening that is provided at a central portion of the first reflection mirror and emits parallel light reflected by the second reflection mirror.

  In the present invention and the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified. The LED substrate is formed of, for example, a flat plate made of an insulating material, and a plurality of LEDs are arranged in rows and columns. The first reflecting mirror has a focal point, for example, a reflecting surface formed on the mirror surface. And the light of several LED attached to the LED board is reflected on a reflective surface, and is condensed toward a focus. Thereby, the light from each LED attached to a different position of the LED substrate is reflected by the reflecting surface of the first reflecting mirror and collected at one point (the focal point of the first reflecting mirror).

  The second reflecting mirror, for example, has a reflecting surface formed on the mirror surface and has a focal point at the same position as the focal point of the first reflecting mirror. And it installs facing a 1st reflective mirror, reflects the reflected light of a 1st reflective mirror, and outputs light as parallel light. Therefore, the light from each LED reflected by the first reflecting mirror is mixed by the second reflecting mirror and emitted as parallel light. The opening is provided at the center of the first reflecting mirror, and emits the parallel light reflected by the second reflecting mirror to the outside. For example, it emits light toward a condensing lens of a spotlight.

  The reflecting surface shape of the first reflecting mirror and the second reflecting mirror is, for example, a parabolic shape or an elliptical shape. In the case of a parabolic shape, the reflecting surface is formed by a parabolic surface having a focal point, and in the case of an elliptical shape, the reflecting surface is formed by an elliptical surface having a focal point. Thereby, sharp directivity and high gain are obtained. As the plurality of LEDs, for example, RGB three-color LEDs are used. The three colors of RGB are appropriately arranged to irradiate the irradiated surface with various colors.

  According to the present invention, the light from a plurality of LEDs mounted on the LED substrate is collected at the focal point by the first reflecting mirror, and further parallel by the second reflecting mirror having the focal point at the same position as the focal position. Since the light exits from the opening as light, it is mixed by the second reflecting mirror, and the mixed light is output to the outside. Accordingly, there is no irradiation deviation even when the subject is out of focus or is blurred.

  An LED light source device according to a second aspect of the present invention is an LED substrate arranged so that light from a plurality of LEDs is condensed toward one point; A reflecting mirror which has a focal point and is installed on the opposite side of the LED substrate to reflect the light of a plurality of LEDs to be parallel light; and the parallel light which is provided at the center of the LED substrate and reflected by the reflecting mirror. And an opening for emitting light.

  According to the present invention, the first reflecting mirror is omitted from the invention of claim 1 and an LED substrate is provided so that the light of a plurality of LEDs is condensed toward one point. The LED substrate is formed of an insulating material, for example, and the plurality of LEDs are arranged so that each light is condensed toward one point.

  The reflecting mirror has a focal point, for example, a reflecting surface formed on the mirror surface. And it arrange | positions so that the focus of a reflective mirror may be located in the condensing point position where the light of several LED condenses. The reflecting mirror reflects light from a plurality of LEDs attached to the LED substrate and emits light as parallel light. Therefore, the light from each LED is mixed by the reflecting mirror and emitted as parallel light. The opening is provided at the center of the LED substrate and emits parallel light reflected by the reflecting mirror to the outside. For example, it emits light toward a condensing lens of a spotlight.

  The LED mounting shape of the LED substrate and the reflecting surface shape of the reflecting mirror are formed, for example, in a parabolic shape or an elliptical shape. When the LED mounting shape of the LED substrate is a parabolic shape, a plurality of LEDs are arranged along a parabolic surface having a focal point. Similarly, when the LED mounting shape of the LED substrate is an elliptical shape, a plurality of LEDs are arranged along an elliptical surface having a focal point. On the other hand, when the reflecting surface of the reflecting mirror has a parabolic shape, the reflecting surface is formed by a parabolic surface having a focal point. Similarly, in the case of an elliptical shape, the reflecting surface is formed by an elliptical surface having a focal point. Thereby, sharp directivity and high gain are obtained. As the plurality of LEDs, for example, RGB three-color LEDs are used. The three colors of RGB are appropriately arranged to irradiate the irradiated surface with various colors.

  According to the present invention, the light from the plurality of LEDs attached to the LED substrate is collected at the focal point of the reflecting mirror, reflected by the reflecting mirror, and emitted as parallel light to the outside from the opening. The colors are mixed and the mixed light is emitted to the outside. Accordingly, there is no irradiation deviation even when the subject is out of focus or is blurred. Further, as compared with the first aspect of the invention, two reflecting mirrors are not required and only one reflecting mirror is sufficient.

  A spotlight according to a third aspect of the present invention is an LED light source device according to any one of the first or second aspect; a spotlight body that houses the LED light source device; and the spotlight body that is housed in the spotlight body. A condensing lens that condenses the light from the LED light source device and emits the light to the outside, and a moving mechanism that relatively changes the distance between the LED light source device and the condensing lens. To do.

  The spotlight body is formed of, for example, a metal box, and houses the LED light source device according to any one of claims 1 and 2. The condensing lens is disposed in the spotlight body at a distance from the opening of the LED light source device, and condenses the emitted light emitted from the opening of the LED light source device. Includes a lens. The moving mechanism makes the distance between the condensing lens and the opening of the LED light source device relatively variable. By focusing with this moving mechanism, the irradiation area on the irradiated surface is continuously changed. In addition, the amount of light can be continuously changed.

  According to the present invention, light from a plurality of LEDs is mixed by the LED light source device, and the mixed light is collected by the condenser lens and focused by the moving mechanism, so that the focus is not achieved. However, even if the image is blurred, the irradiated surface can be illuminated without any irradiation deviation.

  According to the first aspect of the present invention, the light from the plurality of LEDs mounted on the LED substrate is mixed by the second reflecting mirror through the first reflecting mirror, and the mixed light is externally transmitted. Therefore, even if it is out of focus or blurred, there will be no irradiation deviation.

  According to the second aspect of the present invention, light from a plurality of LEDs mounted on the LED substrate is mixed by the reflecting mirror, and the mixed light is emitted to the outside. Even in the case of irradiation, there is no irradiation deviation.

  According to the invention of claim 3, the light from the plurality of LEDs is mixed by the LED type light source device, and the mixed light is collected by the condenser lens and focused by the moving mechanism. Irradiation deviation does not occur even when it is not matched or blurred, and the irradiated surface can be illuminated.

  FIG. 1 is a configuration diagram of an LED type light source apparatus 11 according to the first embodiment of the present invention. The LED board 12 is formed in a flat plate with an insulating material, and a plurality of LEDs 13 are arranged on the surface thereof. The plurality of LEDs 13 are mounted so as to face the reflecting surface of the first reflecting mirror 14 and are arranged in the vertical and horizontal directions of the LED substrate 12, and irradiate light toward the reflecting surface of the first reflecting mirror 14. As the plurality of LEDs 13, LEDs of three colors of red R, green G, and blue B are used, and these RGB three colors of LEDs 13 are appropriately arranged on the LED substrate 12 to irradiate the irradiated surface with various colors. I can do it.

  The first reflecting mirror 14 has, for example, a reflecting surface 14a formed on the mirror surface and has a focal point F. The light of the plurality of LEDs 13 attached to the LED substrate 12 is reflected by the reflecting surface and condensed toward the focal point F. Is. Thereby, the light from each LED 13 attached to each different position of the LED substrate 12 is reflected by the reflecting surface 14a of the first reflecting mirror 14, and is collected at one point (the focal point F of the first reflecting mirror). Lighted. An opening 15 is provided at the center of the first reflecting mirror 14. The opening 15 emits the light reflected by the reflecting surface 16a of the second reflecting mirror 16, which will be described later, to the outside.

  The shape of the reflecting surface 14a of the first reflecting mirror 14 is formed in a parabolic shape or an elliptical shape. When the reflecting surface 14a of the first reflecting mirror 14 is parabolic, the reflecting surface 14a is a parabolic surface having a focal point F. Similarly, when the reflective surface 14a is elliptical, the reflective surface 14a is an elliptical surface having a focal point. Since the shape of the reflecting surface 14a is formed in a parabolic shape or an elliptical shape, sharp directivity and high gain can be obtained.

  The second reflecting mirror 16 has, for example, a reflecting surface 16 a formed as a mirror surface, and has a focal point F at the same position as the focal point F of the first reflecting mirror 14. And it is installed facing the first reflecting mirror 14. The reflecting surface 16a of the second reflecting mirror 16 reflects the light from the first reflecting mirror 14 incident through the focal point F and emits it as parallel light. Accordingly, the light from each LED reflected by the first reflecting mirror 14 is mixed by the second reflecting mirror 16 and emitted as parallel light. The parallel light reflected by the second reflecting mirror 16 is emitted to the outside through the opening 15 of the first reflecting mirror 14. For example, the light is emitted toward a condensing lens of a spotlight. Here, since the shape of the reflecting surface 16a of the second reflecting mirror 16 is also formed in a parabolic shape or an elliptical shape like the reflecting surface 14a of the first reflecting mirror 14, sharp directivity and high gain are obtained. It is done.

  According to the first embodiment, the light from the plurality of LEDs 13 attached to the LED substrate 12 is condensed at the focal point F by the first reflecting mirror 14, and the focal point F is focused at the same position as the focal point F. Since the second reflecting mirror 16 that has the light exits to the outside through the opening 15 as parallel light, the second reflecting mirror 16 mixes the color, and the mixed light is output to the outside. Accordingly, there is no irradiation deviation even when the subject is out of focus or is blurred.

  FIG. 2 is a block diagram of an LED type light source device 11 according to the second embodiment of the present invention. In the second embodiment, the first reflecting mirror 14 is omitted from the first embodiment shown in FIG. 1, and the light from the plurality of LEDs 13 is one point (focal point F of the reflecting mirror 18). The LED board 17 arrange | positioned so that it may condense toward is provided.

  The LED substrate 17 is formed of, for example, an insulating material, and the plurality of LEDs 13 are arranged so that each light is condensed toward one point (focal point F of the reflecting mirror 18). As the plurality of LEDs 13, LEDs of three colors of red R, green G, and blue B are used, and these RGB three colors of LEDs 13 are appropriately arranged on the LED substrate 12 to irradiate the irradiated surface with various colors. I can do it. An opening 15 is provided at the center of the LED substrate 17. The opening 15 emits light reflected by a reflecting surface 18a of a reflecting mirror 18 described later to the outside.

  The LED mounting shape of the LED substrate 17 is a parabolic shape or an elliptical shape. When the LED mounting shape of the LED substrate 17 is a parabolic shape, a plurality of LEDs 13 are arranged along a parabolic surface having a focal point F. When the LED mounting shape of the LED substrate 17 is elliptical, a plurality of LEDs 13 are arranged along the elliptical surface having the focal point F. Thereby, the light of several LED13 is condensed toward one point (focal point F of the reflective mirror 18).

  The reflecting mirror 18 has a focal point F with a reflecting surface 18a formed on the mirror surface, for example. And it arrange | positions so that the focus F of the reflective mirror 18 may be located in the position where the light of several LED13 attached to LED board 17 condenses. The reflecting mirror 18 reflects light from the plurality of LEDs 13 attached to the LED substrate 17 and emits it as parallel light. Therefore, the light from each LED 13 is mixed by the reflecting mirror 18 and emitted to the outside as parallel light from the opening 15 of the LED substrate 17. For example, light is emitted toward a condensing lens of a spotlight.

  Here, the shape of the reflecting surface 18 a of the reflecting mirror 18 is formed in a parabolic shape or an elliptical shape, similarly to the shape of the LED substrate 17. When the shape of the reflecting surface 18a of the reflecting mirror 18 is a parabolic shape, the reflecting surface 8a is formed as a paraboloid having a focal point. In the case of an elliptical shape, the reflecting surface 8a is formed of an elliptical surface having a focal point. As a result, light from the plurality of LEDs 13 is reflected, and sharp directivity and high gain are obtained for the reflected light.

  According to the second embodiment, the light from the plurality of LEDs 13 attached to the LED substrate 17 is collected at the focal point F of the reflecting mirror 18, reflected by the reflecting mirror 18, and converted into parallel light from the opening 15. Since the light is emitted to the outside, the reflection mirror 18 mixes the colors, and the mixed light is emitted to the outside. Accordingly, there is no irradiation deviation even when the subject is out of focus or is blurred. Also, one reflecting mirror is sufficient without requiring two reflecting mirrors.

  FIG. 3 is a configuration diagram of a spotlight according to the third embodiment of the present invention. In the third embodiment, the spotlight 20 is configured by housing the LED light source device 11 according to the first embodiment or the second embodiment in a spotlight body 19.

  The LED light source device 11 is accommodated in the spotlight main body 19, and a condensing lens 21 is provided on the spotlight main body 19 facing the opening 15 of the LED light source device 11. The condensing lens 21 condenses the light emitted from the opening 15 of the LED light source device 11 and emits it to the outside, and a spherical lens or a flat lens is used. In addition, a moving mechanism 22 is provided that makes the distance between the condenser lens 21 and the opening 15 of the LED light source device 11 relatively variable. The moving mechanism 22 focuses the surface to be irradiated. Thereby, the irradiation area on the irradiated surface can be continuously changed and the amount of light can be continuously changed.

  According to the third embodiment, the light from the plurality of LEDs 13 is mixed by the LED light source device 11, and the mixed light is collected by the condenser lens 21 and focused by the moving mechanism 22. Therefore, even if the subject is out of focus or is blurred, the irradiated surface can be illuminated without causing an irradiation deviation.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram of the LED type light source device concerning the 1st Embodiment of this invention. The block diagram of the LED type light source device concerning the 2nd Embodiment of this invention. The block diagram of the spotlight concerning the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... LED type light source device, 12 ... LED board, 13 ... LED, 14 ... 1st reflective mirror, 15 ... Opening part, 16 ... 2nd reflective mirror, 17 ... LED board, 18 ... Reflective mirror, 19 ... Spot Light body, 20 ... spotlight, 21 ... condensing lens, 22 ... moving mechanism

Claims (3)

An LED substrate on which a plurality of LEDs are mounted;
A first reflecting mirror for condensing light from a plurality of LEDs attached to the LED substrate toward a focal point;
A second reflecting mirror that has a focal point at the same position as the focal position of the first reflecting mirror and is disposed on the opposite side of the first reflecting mirror to reflect the reflected light of the first reflecting mirror and make it parallel light; ;
An LED-type light source device comprising: an opening that is provided at a central portion of the first reflecting mirror and emits parallel light reflected by the second reflecting mirror. An LED substrate arranged so that light from a plurality of LEDs is condensed toward one point;
A reflecting mirror that has a focal point at the same position as the condensing point position of the light of the plurality of LEDs and is disposed on the opposite side of the LED substrate to reflect the light of the plurality of LEDs to be parallel light;
An LED-type light source device comprising: an opening that is provided at a central portion of the LED substrate and emits parallel light reflected by the reflecting mirror. An LED-type light source device according to claim 1;
A spotlight body that houses the LED light source device;
A condensing lens that condenses the light from the LED-type light source device housed in the spotlight body and emits it to the outside;
A spotlight comprising a moving mechanism for relatively changing a distance between the LED light source device and the condenser lens.

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