JP2005190859A - Light emitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting device capable of emitting light of a plurality of colors with little color unevenness in a wide range. <P>SOLUTION: The light emitting device comprises a first LED which emits a first light, a second LED which emits a second light of a different wavelength from the first light, a first reflector which is installed on an optical axis of the first LED and reflects the first light to the sideward against the optical axis direction of the first LED, a second reflector which is installed on the optical axis of the second LED and reflects the second light to the sideward against the optical direction of the second LED, and a peripheral reflector which reflects the first light reflected by the first reflector and the second light reflected by the second reflector in a target direction. The first light reflected by the first reflector and the second light reflected by the second reflector are color mixed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a light emitting device using LEDs. The light emitting device of the present invention is used as, for example, a decoration device in a game table.

Utilizing advantages such as low power consumption and long life, LEDs are used in various applications such as a light source of a lighting device. LED light has higher directivity than light from a bulb (bulb), a fluorescent lamp, a cold cathode tube, etc., and therefore, a large number of LEDs are generally used when irradiating a wide area. On the other hand, a method of irradiating a wide area with one LED by reflecting LED light with a reflector and expanding an irradiation range has been proposed (see Patent Document 1 and Patent Document 2). Specifically, the following apparatus is known (FIG. 9). This apparatus includes one LED 900, a convex conical reflector 901 at an irradiation position of the LED 900, and a peripheral reflector 903 that reflects light reflected by the reflector 901 in a target direction. In this apparatus, the LED light is reflected laterally by the reflector 901 and further reflected by the peripheral reflector 903 in the target direction. As a result, a wide range of light radiating in the target direction can be obtained.
JP 2001-93312 A JP-A-10-133607

  A light-emitting device used for illumination or decoration is required to be excellent in decoration effects, such as having a wide light-emitting area and being able to obtain a variety of light-emitting modes. As one of light-emitting devices that meet this requirement, a light-emitting device that can emit light of two or more colors in a wide range is conceivable. In such a light emitting device, for example, two or more kinds of LEDs having different emission colors are used. However, even if two or more types of LEDs having different emission colors are used in the conventional light emitting device, the LED light does not mix well because the reflection mode differs depending on the position of the LED. As a result, color unevenness occurs in light emission. Therefore, the light-emitting device using two or more kinds of LEDs having different emission colors is not suitable as a light-emitting device for illumination or decoration.

In order to solve the above problems, the present invention provides the following configurations. That is,
A first LED emitting a first light;
A second LED that emits second light having a wavelength different from that of the first light;
A first reflector provided on the optical axis of the first LED and reflecting the first light laterally with respect to the optical axis direction of the first LED;
A second reflector provided on the optical axis of the second LED and reflecting the second light laterally with respect to the optical axis direction of the second LED;
A peripheral reflector that reflects the first light reflected by the first reflector and the second light reflected by the second reflector in a target direction;
With
In the light emitting device, the first light reflected by the first reflector and the second light reflected by the second reflector are mixed in color.

  In the light-emitting device according to the present invention, first, the first light emitted from the first LED is irradiated to the first reflector installed on the optical axis of the first LED. The light irradiated to the first reflector is reflected laterally with respect to the optical axis direction of the first LED. The reflected light is reflected in the target direction by the peripheral reflector. Similarly, the 2nd light discharge | released from 2nd LED is irradiated to the 2nd reflector installed on the optical axis of 2nd LED. The light irradiated by the second reflector is reflected laterally with respect to the optical axis direction of the second LED. The reflected light is reflected in the target direction by the peripheral reflector and can irradiate a wide range. Here, since the first light and the second light are reflected laterally by the first reflector and the second reflector, both the lights are mixed well. As a result, the finally obtained light has little color unevenness. On the other hand, a wide light emitting area can be ensured by reflecting the light of each LED in two stages and radiating it externally. As described above, in the light emitting device of the present invention, the light of two types of LEDs having different emission colors is controlled by the reflector provided for each LED and the peripheral reflector, thereby reducing the color unevenness and the light emitting area. A wide decoration light can be emitted, and a high decorative effect can be obtained.

Hereinafter, each element constituting the present invention will be described.
(LED)
In the present invention, an LED is used as the light source. Since the LED is small, the installation space is small, and the light emitting device according to the present invention can be configured in a small size. In addition, the LED responds to demands for energy saving such as low power consumption and a small calorific value. Furthermore, since the LED has a long life, it is advantageous in terms of maintenance. In addition, since the LED is strong against vibration and impact, it is possible to constitute a highly reliable light-emitting device. LEDs also have the advantage of fast response speed, enabling easy and instantaneous switching between lighting and non-lighting, adjusting brightness, and changing emission colors (when using LEDs capable of emitting two or more colors). The kind of LED is not particularly limited, and various types such as a bullet type (lens type) and a chip type can be adopted.

  In the light emitting device of the present invention, a first LED that emits first light and a second LED that emits second light having a wavelength different from that of the first light are used. The emission colors of the first LED and the second LED are not particularly limited, and LEDs of emission colors such as red, blue, green, and white can be employed. In one embodiment of the present invention, a third LED that emits third light is used. The emission color of the third LED is not particularly limited, and LEDs of emission colors such as red, green, blue, and white can be employed. Preferably, a red LED is used for the first LED, a green LED is used for the second LED, and a blue LED is used for the third LED. By using a combination of LEDs of the three primary colors of light, it is possible to provide a light emitting device capable of white light emission and multicolor or full color light emission. The number of LEDs used in the light emitting device in the present invention is not particularly limited, but can be determined in consideration of the required light emitting area, luminance, and the like. For example, 3, 4, 5, 6 or 9 LEDs are used. When three types of LEDs, red LED, green LED, and blue LED, are used, it is preferable to use n LEDs of each color (where n is a positive integer), that is, 3n in total. This is because color balance is improved by using the same number of LEDs of each color. Although the arrangement mode of each LED is not particularly limited, it is preferable to arrange each LED so that a line connecting each LED becomes a virtual regular polygon (regular triangle, square, regular pentagon, regular hexagon, regular pentagon, etc.). . This is because the brightness balance is improved by arranging the LEDs at equal intervals. In this case, it is preferable to employ an arrangement mode in which LEDs having the same emission color are arranged diagonally. This is because the color balance is improved by arranging the respective emission colors at equal intervals. The following can be mentioned as a specific arrangement example. That is, two red LEDs, two blue LEDs, and two green LEDs are used, for a total of six LEDs. A blue LED is arranged at one of the vertices of a regular hexagon, and a red LED and a green LED are adjacent to each other. The LEDs are arranged, and the remaining LEDs are arranged at the vertices of diagonal positions of the LEDs of the same color.

(First and second reflectors)
The reflector reflects the received light laterally with respect to the optical axis direction of the LED. Examples of the shape of the reflector include a reflective surface made of a white resin, and a reflective surface made of a metal such as Al or Ag. You may utilize the reflective surface of the recessed part provided in some members which consist of a light-transmitting material as a reflector. This is because the LED light is reflected inside the member, the LED light is mixed inside the member, and the emission colors of the LED lights are mixed well. At least one reflector is provided on the optical axis of each LED. You may decide to provide the reflector which receives the light of two LED. The shape of each reflector is not particularly limited as long as the received light can be reflected laterally with respect to the optical axis direction of the LED that has emitted the light, that is, in the direction of the peripheral reflector. The shape of the reflector is preferably a convex conical surface shape having a central axis coinciding with the optical axis of each LED, or a convex rotating paraboloid shape having a rotation axis coinciding with the optical axis of each LED. With this configuration, each reflector reflects each LED light in all directions lateral to the optical axis direction of the LED. More preferably, all the reflectors have the same shape. Specifically, all the reflectors have a convex conical surface shape having a central axis that matches the optical axis of each LED, or a convex rotary paraboloid shape that has a rotation axis that matches the optical axis of each LED. Moreover, it arrange | positions so that the vertex of all the reflectors may become the same plane, This plane is perpendicular | vertical to the optical axis of 1st LED. According to such a configuration, the light of each LED is reflected in all directions lateral to the optical axis by the corresponding reflector, and mixed with the light of other LEDs in a balanced manner.

  In one embodiment of the present invention, a lens having a reflector is provided on the light emission side of the plurality of LEDs. The material of the lens is not particularly limited as long as it is a light transmissive material. Examples of the light transmissive material include synthetic resins such as acrylic resin, polyethylene terephthalate (PET), polycarbonate resin, silicone resin, and epoxy resin, and inorganic materials such as glass. The lens includes a surface (light incident surface) facing the LED and a reflective surface (reflector) that reflects the incident LED light. The position, shape, and the like of the light incident surface are not particularly limited as long as the light incident surface can transmit the emitted light of the facing LED. The reflector only needs to have an inclination angle capable of reflecting at least part of the light introduced into the lens in the predetermined direction. That is, the reflector only needs to have an inclination angle at which the incident angle of at least a part of the light introduced through the light incident surface exceeds the critical angle of the reflector. When light is going to travel from a material having a refractive index n1 to a material having a refractive index n2 (where n1> n2), if the incident angle to the material having a refractive index n2 exceeds a critical angle, the light has a refractive index n2. It is totally reflected without passing through. The critical angle is a specific value determined by the material through which light passes, and the critical angle when light travels from the acrylic resin into the air is about 43 °. Therefore, when the reflector is made of acrylic resin, it is preferable to form the reflector so that the incident angle is greater than about 43 °. Each reflector may be configured integrally with another reflector. The shape of the reflector is preferably a convex conical surface shape having a central axis that matches the optical axis of each LED, or a convex paraboloid shape having a rotation axis that matches the optical axis of each LED. With this configuration, each reflector reflects each LED light in all directions lateral to the optical axis direction of the LED. More preferably, all the reflectors have the same shape. Specifically, all the reflectors have a convex conical surface shape having a central axis that matches the optical axis of each LED, or a convex rotary paraboloid shape that has a rotation axis that matches the optical axis of each LED. Moreover, it arrange | positions so that the vertex of all the reflectors may become the same plane, This plane is perpendicular | vertical to the optical axis of 1st LED. According to such a configuration, the light of each LED is reflected in all directions lateral to the optical axis by the corresponding reflector, and mixed with the light of other LEDs in a balanced manner.

  It is preferable that the lens includes each LED. At this time, the enclosed LED and the lens may be arranged with a gap therebetween. When a bullet type (lens type) LED is adopted as the LED, a sealing member of the bullet type (lens type) LED may be used as the lens here, or the sealing member and the lens here are integrated. You may comprise. In the former case, a reflective surface is provided on a part of the sealing member of the bullet type (lens type) LED. Similarly, when a chip-type LED is employed, the sealing member can be used as a lens here. As described above, if the LED is embedded or embedded in the lens, the reflector formed on the lens can efficiently receive the light of the LED element, and the light emission efficiency can be improved.

  The lens may contain a phosphor. Any fluorescent material that emits a desired fluorescent color can be selected and used as long as it fluoresces upon receiving LED light, regardless of whether it is organic or inorganic. By using an organic phosphor, it is possible to obtain fluorescent light with a clear feeling. When an inorganic phosphor is used, fluorescent light with a matte feeling can be obtained.

(Border reflector)
The peripheral reflector in the present invention is provided so as to surround the side of the LED, reflects the reflected light from the reflector (the first reflector, the second reflector, the third reflector) in a target direction and irradiates a wide range. Make it possible. In the present specification, the “target direction” refers to a direction in which light is desired to be emitted when the light emitting device of the present invention is used. For example, the first LED (and / or the second LED) is used. This is the same direction as the optical axis direction. The peripheral reflector is formed of a material having at least a light receiving surface with high light reflectance. Examples of such materials include white resins and metals such as Al and Ag. The shape of the peripheral reflector is not particularly limited as long as the light reflected by the reflector can be reflected in a target direction. In other words, the light emission mode can be controlled depending on the peripheral reflector. The shape of the peripheral reflector is preferably a substantially concave paraboloid. In this way, the light received by the peripheral reflector can be efficiently reflected in the target direction. For example, the shape of the peripheral reflector may be a stepped surface along the concave paraboloid. Further, the shape of the peripheral reflector may be a part of a substantially concave paraboloid shape. For example, the shape of the peripheral reflector may be one partial concave paraboloid obtained by dividing the concave paraboloid by a plane including the rotation axis. Further, the shape of the peripheral reflector may not be uniform. That is, some of the shapes may be different from others. The peripheral reflector is installed such that the plurality of LEDs are on the concave side on the rotational axis of the concave paraboloid and the light emission direction of the LEDs is on the opening side of the concave paraboloid.

  Hereinafter, the configuration of the present invention will be described in more detail using examples.

  A light emitting device 1 according to one embodiment of the present invention is shown in FIGS. FIG. 1 is a perspective view of the light emitting device 1. 2 is a cross-sectional view taken along line AA of the light emitting device 1 in FIG. 3 is a cross-sectional view of the light emitting device 1 taken along the line BB in FIG. The light emitting device 1 includes two bullet-type red LEDs 10 and 11, two bullet-type blue LEDs 12 and 13, and two bullet-type green LEDs 14 and 15. The LEDs 10 to 15 are respectively arranged at the positions of the vertices of the virtual regular hexagon on the substrate 3. Specifically, the blue LED 10 is arranged at one of the vertices of the virtual regular hexagon, the red LED 12 and the green LED 14 are arranged next to each other, and the remaining LEDs 11, 13, and 15 are at the vertices of diagonal positions of the LEDs of the same color. Each is arranged. Electric power is supplied to the LEDs 10 to 15 through a wiring pattern and a power line 4 formed on the surface of a circuit board (not shown). Further, the LEDs 10 to 15 are subjected to lighting control by a controller (not shown) connected via the control line 5. An element (not shown) such as a protective resistor is provided on a circuit board (not shown).

  The lens 2 is made of acrylic resin and is disposed so as to enclose the LEDs 10 to 15. The lens 2 includes surfaces (light incident surfaces 20 and 21) facing the LEDs 10 to 15 and reflecting surfaces (reflectors) 22 to 27 that reflect incident light. The light incident surface 20 is perpendicular to the optical axis of the facing LEDs 10 to 15. On the other hand, the light incident surface 21 at the center of the lens 2 has a shape along the reflectors 22 to 27. The reflectors 22 to 27 are formed by a recess provided on the opposite side of the lens 2 from the side facing the LED. The shape of the reflectors 22 to 27 is the same shape of the convex conical surface, and the central axis of each convex conical surface coincides with the optical axis of each of the LEDs 10 to 15, and the vertexes of the convex conical surfaces are the same plane. The plane is perpendicular to the optical axis of the LED 10. Further, the angle formed between the convex conical surfaces of the reflectors 22 to 27 and the central axis of the convex conical surfaces is 45 °. Each edge part of the reflectors 22-27 is continuing to the edge part of an adjacent reflector. That is, all of the reflectors 22 to 27 are integrally formed.

  The peripheral reflector 30 is made of Al. The peripheral reflector 30 has a concave rotating paraboloid shape. The axis of rotation of the concave paraboloid of the peripheral reflector 30 passes through the center of gravity of the LEDs 10-15. The LEDs 10 to 15 are located on the bottom side of the concave rotating paraboloid of the peripheral reflector 30. Moreover, the peripheral reflector 30 is installed so that the light emission direction of the LEDs 10 to 15 is on the opening side of the concave paraboloid.

  Next, the light emission mode of the light emitting device 1 will be described. First, light emitted from the LED 10 is introduced into the lens 2 from the light incident surface 20 and the light incident surface 21 of the lens 2. The light introduced from the light incident surface 20 is reflected by the first reflector 22 in all directions lateral to the optical axis direction of the LED. On the other hand, the light incident on the light incident surface 21 is largely refracted when introduced into the lens 2 because the incident angle on the light incident surface 21 is large. As a result, the light introduced into the lens 2 in this way has an incident angle on the first reflector 22 that is less than the critical angle, and is extracted outside without being reflected by the first reflector 22. The light is emitted in a direction substantially parallel to the optical axis direction of the LED 10. As in the case of the LED 10, among the light emitted from the LED 11, the light introduced from the light incident surface 20 into the lens 2 is reflected by the reflector 23 in all directions lateral to the optical axis direction of the LED 11. . On the other hand, of the light emitted from the LED 11, the light introduced from the light incident surface 21 into the lens 2 is extracted outside without being reflected by the reflector 23, and is emitted in a direction substantially parallel to the optical axis direction of the LED 11. To do. Similarly, for the LEDs 12 to 15, among the light emitted from the LEDs, the lights introduced into the lens 2 through the light incident surface 20 are respectively reflected by the reflectors 24 to 27. Reflected in all directions lateral to the axial direction. On the other hand, among the light emitted from the LEDs 12 to 15, each light introduced from the light incident surface 21 to the lens 2 is extracted outside without being reflected by the reflectors 24 to 27, and the optical axes of the LEDs 12 to 15. Radiates in a direction substantially parallel to the direction. The reflected light from the reflectors 24 to 27 is further reflected by the peripheral reflector 30 and reflected in a direction substantially parallel to the optical axis direction of the LEDs 12 to 15. Here, as described above, part of the emitted light from the LEDs 10 to 15 is reflected in all directions lateral to the respective optical axis directions of the LEDs 10 to 15, so that the emitted lights from the LEDs 10 to 15 are well mixed. The light emission colors are mixed in a well-balanced manner. As a result, light with little color unevenness can be emitted.

  The lighting states of the LEDs 10 to 15 are controlled by a controller (not shown). By controlling the lighting state of the LEDs 10 to 15, it is possible to emit not only the intermediate colors of red, blue and green, but also light of any two intermediate colors selected from the three colors of red, blue and green. . Furthermore, by controlling the brightness of the LEDs 10 to 15, a variety of colors such as red, blue and green intermediate colors and light of any two intermediate colors selected from the three colors red, blue and green can be obtained. It is possible to emit light.

  Next, a light emitting device 100 according to another embodiment of the present invention will be described. FIG. 4 shows a longitudinal sectional view of the light emitting device 100. In the drawings used in the following description, the same members as those of the light emitting device 1 described above are denoted by the same reference numerals, and the description thereof is omitted. The lens 200 used in the light emitting device 100 includes a light incident surface 210 that is integrally formed on a surface facing the LEDs 10 to 15. Other configurations are the same as those of the light-emitting device 1.

  The light emission mode of the light emitting device 100 will be described. Light from the LEDs 10 to 15 is introduced from the light incident surface 210 to the lens 200. Each introduced light is reflected by reflectors 22-27 in all directions lateral to the optical axis direction of LEDs 10-15, that is, in the direction of the peripheral reflector. Each reflected light is reflected in a direction substantially parallel to the optical axis direction of the LEDs 10 to 15 by the peripheral reflector. Since substantially all the light from the LEDs 10 to 15 is reflected by the reflectors 22 to 27 in all directions lateral to the optical axis direction of the LEDs 10 to 15, the light is reflected to the side in the optical axis direction of the LEDs 10 to 15. As a result, the amount of light emitted from the LEDs 10 to 15 is mixed. Therefore, red, blue and green are further mixed, and light with extremely little color unevenness can be emitted.

  Next, a light emitting device 110 according to another embodiment of the present invention will be described. FIG. 5 shows a longitudinal sectional view of the light emitting device 110. In the drawings used in the following description, the same members as those of the light emitting device 1 described above are denoted by the same reference numerals, and the description thereof is omitted. In the light emitting device 110, a step surface is formed on the peripheral reflector 300. Other configurations are the same as those of the light-emitting device 1.

  Next, the light emission mode of the light emitting device 110 will be described. In the light emitting device 110, the light transmitted through the reflectors 22 to 27 among the lights of the LEDs 10 to 15 is emitted in a direction substantially parallel to the optical axis direction of the LEDs 10 to 15. The light reflected by the light 27 travels in all directions lateral to the optical axis direction of the LEDs 10 to 15, that is, toward the peripheral reflector 300. The LED light reflected by the reflectors 22 to 27 in the optical axis direction of the LEDs 10 to 15, that is, in the direction of the peripheral reflector 300, is irradiated in the target direction by the peripheral reflector 300. As a result, a part of the light of the LEDs 10 to 15 is reflected by the reflectors 22 to 27 in all the lateral directions of the LEDs 10 to 15 in the respective optical axis directions, so that they are well mixed. Furthermore, since the peripheral reflector has a stepped surface shape, light is irregularly reflected on the stepped surface, and the mixing of light is promoted. Therefore, light with little color unevenness can be emitted over a wide area.

  Next, a light emitting device 400 according to another embodiment of the present invention will be described. 6 is a perspective view of the light emitting device 400, FIG. 7 is a front view of the light emitting device 400, and FIG. In the drawings used in the following description, the same members as those of the light emitting device 1 described above are denoted by the same reference numerals, and the description thereof is omitted. The red light emitting LED chips 510 and 511 are mounted on the cup-like portions 503 and 523 formed on the lead frames 502 and 522 using a silver paste or the like. Thereafter, the cup-shaped portions 503 and 523 are filled with an epoxy resin. Similarly, blue light emitting LEDs 512 and 513 and green light emitting LEDs 514 and 515 are mounted. Thereafter, the six LEDs 510 to 515 are sealed with an epoxy resin, and the lens 410 is formed with the epoxy resin. Therefore, the LEDs 510 to 515 are embedded in the lens 410. The lens 410 includes reflectors 22 to 27 on the surface facing the LEDs 510 to 515. The central axes of the convex conical surfaces of the reflectors 22 to 27 coincide with the optical axes of the LEDs 510 to 515, respectively, and the apexes of the convex conical surfaces are arranged in the same plane, and the plane is perpendicular to the optical axis of the LED 510. It is. The angle formed between each convex conical surface and the central axis of the convex conical surface is 45 °.

  Next, an irradiation mode of the light emitting device 400 will be described. First, the light emitted from the LED 510 is reflected in all directions lateral to the optical axis direction of the LED 510 by the reflector 22 provided in the lens 410. The light emitted from the LED 511 is reflected in all directions lateral to the optical axis direction of the LED 511 by the reflector 23 provided in the lens 410. Similarly, for the LEDs 512 to 515, the light emitted from the LEDs 512 to 515 is reflected by the reflectors 24 to 27 in all lateral directions with respect to the respective optical axis directions of the LEDs 512 to 515. The reflected light from the reflectors 24 to 27 is further reflected by the peripheral reflector 30 and reflected in a direction substantially parallel to the optical axis direction of the LEDs 512 to 515. When the light emitted from the LEDs 510 to 515 is reflected by the reflectors 22 to 27, the light emitted from the LEDs 510 to 515 is reflected in all lateral directions with respect to the respective optical axis directions of the LEDs 512 to 515. The red, blue and green emission colors are mixed in a balanced manner. As a result, light with little color unevenness can be emitted. Further, since the LEDs 510 to 515 are embedded in the lens 410, the light emitted from the LEDs 510 to 515 is directly applied to the reflectors 22 to 27 without passing through the lens incident surface or the like. Therefore, substantially all of the light emitted from the LEDs 510 to 515 can be irradiated onto the reflectors 22 to 27, and a light emitting device with high luminous efficiency can be obtained.

  The lighting states of the LEDs 510 to 515 are controlled by a controller (not shown). By controlling the lighting state of the LEDs 510 to 515, it is possible to emit not only the intermediate colors of red, blue and green, but also light of any two intermediate colors selected from the three colors of red, blue and green. . Furthermore, by controlling the luminance of the LEDs 510 to 515, it is possible to obtain more various colors such as light of intermediate colors of red, blue and green and two intermediate colors selected from three colors of red, blue and green. Light can be emitted without color unevenness.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

  The light-emitting device of the present invention is used for applications where good intermediate-color light is required. For example, it can be used as a lighting device for a game stand or a lamp for a vehicle such as an automobile.

FIG. 1 is a perspective view of a light emitting device 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the light emitting device 1 according to an embodiment of the present invention taken along the line AA in FIG. 3 is a cross-sectional view of the light emitting device 1 according to one embodiment of the present invention taken along the line BB in FIG. FIG. 4 is a longitudinal sectional view of a light emitting device 100 according to another embodiment of the present invention. FIG. 5 is a longitudinal sectional view of a light emitting device 110 according to another embodiment of the present invention. FIG. 6 is a perspective view of a light emitting device 400 according to another embodiment of the present invention. FIG. 7 is a front view of a light emitting device 400 according to another embodiment of the present invention. 8 is a cross-sectional view taken along the line CC of FIG. 7 of a light emitting device 400 according to another embodiment of the present invention. FIG. 9 is an example of the prior art.

Explanation of symbols

1 100 110 400 Light-emitting device 10 11 12 13 14 15 510 511 512 513 514 514 LED
2 20 200 410 Lens 22 23 24 25 26 27 Reflector 30 300 Perimeter reflector

Claims (10)

A first LED emitting a first light;
A second LED that emits second light having a wavelength different from that of the first light;
A first reflector provided on the optical axis of the first LED and reflecting the first light laterally with respect to the optical axis direction of the first LED;
A second reflector provided on the optical axis of the second LED and reflecting the second light laterally with respect to the optical axis direction of the second LED;
A peripheral reflector that reflects the first light reflected by the first reflector and the second light reflected by the second reflector in a target direction;
With
The light emitting device, wherein the first light reflected by the first reflector and the second light reflected by the second reflector are mixed in color.   The first reflector reflects the first light in all directions lateral to the optical axis direction of the first LED, and the second reflector reflects the second light in the direction of the optical axis. The light emitting device according to claim 1, wherein the light emitting device reflects in all directions lateral to the optical axis direction of the second LED.   The light emitting device according to claim 1, wherein each of the first reflector and the second reflector has a convex conical surface shape or a convex paraboloid shape.   The light emitting device according to any one of claims 1 to 3, wherein the first reflector is formed integrally with the second reflector. A third LED that emits third light;
A third reflector provided on the optical axis of the third LED and reflecting the third light laterally with respect to the optical axis direction of the third LED;
Further comprising
The first light is red light, the second light is green light, and the third light is blue light. The light-emitting device in any one.   The first LED, the second LED, and the third LED are each provided with n pieces, and the n pieces of LEDs are arranged at vertices of 3n virtual regular polygons. The light-emitting device according to claim 5.   The light emitting device according to claim 6, wherein two adjacent LEDs emit light having different wavelengths.   The light-emitting device according to claim 1, wherein the peripheral reflector has a substantially concave paraboloid shape. A first LED emitting a first light;
A second LED that emits second light having a wavelength different from that of the first light;
A light transmissive member disposed on a light emitting side of the first LED and the second LED, on a side opposite to the side facing the first LED on the optical axis of the first LED; A first recess formed on the optical axis of the second LED, and a second recess formed on the side opposite to the side facing the second LED, the first recess being The first light introduced from the side facing the first LED is reflected laterally with respect to the optical axis direction of the first LED, and the second recess is A light transmissive member that reflects the second light introduced from the side facing the LED sideways with respect to the optical axis direction of the second LED; and
A peripheral reflector that reflects the first light reflected by the first recess and the second light reflected by the second recess in a target direction;
A light emitting device comprising:   The light-emitting device according to claim 9, wherein the light transmissive member includes the first LED and the second LED.

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