JP2017118101A - LED light emitting device - Google Patents

Abstract

An object of the present invention is to provide an LED light-emitting device that has good color mixing when emitting light and looks uniform in appearance when not emitting light. An LED light emitting device (1) comprises a substrate (11), an LED light source (20) arranged on the substrate, and reflecting frames (12A, 12B) arranged on the side of the LED light source on the substrate. The LED light source includes a side emission type LED element (30) that is arranged on the substrate and outputs light toward the side reflection frame, and a side emission type LED element (30) on the top of the side emission type LED element an upper LED element (40) arranged on the substrate across the side emission type LED element so as not to block at least part of the light emitted from the upper LED element (40) for outputting upward light of a color different from that of the side emission type LED element; and the reflective frame is arranged to reflect upward the light output from the side emitting LED element. [Selection drawing] Fig. 1

Description

  The present invention relates to a light emitting device having LED elements, and more particularly to an LED light emitting device having a plurality of LED elements that emit light of different colors.

  An LED element, which is a semiconductor element, has a long life and excellent driving characteristics, and is also widely used for illumination and the like in recent years because it is small, has a high luminous efficiency and has a bright emission color.

  Furthermore, a light emitting device using an LED element as a light source for flash photography of a camera is mounted on a portable terminal. The light emitting device for flash photography desirably has spectral characteristics such that a white object is imaged in white, including the spectral sensitivity of the image sensor of the camera. Therefore, an LED light-emitting device for flash photography combines a plurality of different LED light sources, for example, a white LED light source and an amber LED light source so as to obtain desired spectral characteristics. ing.

  For example, Patent Document 1 includes a package body having a mount part for mounting an LED chip, and a plurality of LED chips mounted on the mount part, and the package body has a reflective cup formed on the top. The mount portion is disposed on the bottom of the reflective cup, the top surface of the mount portion is non-planar, the mount portion has a cross-sectional structure that bulges upward, and the side surface of the chip is between at least two adjacent LED chips. LED packages that are oriented in different directions are described.

  Patent Document 2 discloses a substrate made of a flat material, first and second conductors disposed on the substrate, a bare light-emitting diode positioned on the surface of the substrate and bonded to the conductor, and a diode. Total reflection positioned on the diode that focuses the light emitted from the light emitting diode so as to enhance the light generated by the diode and the light reflected by the surface, provided on the surface of the positioned substrate. A light emitting diode assembly comprising a (TIR) lens is described.

JP 2007-294962 A JP-A-9-27641

  For example, in an LED light-emitting device having two LED elements of different colors, the LED element has two LEDs regardless of whether the LED element mounting surface is flat or the LED element is mounted on a trapezoidal mount section. The light from the element is reflected by the reflection surface on the opposite side of the reflection frame (reflection cup) arranged so as to surround the LED element, and directly emitted to the outside (front surface). For this reason, the light from the two LED elements is not sufficiently mixed, and the color of the emitted light from one LED element becomes strong on each side of the light irradiation surface. In other words, there is a problem that the colors of two different LED elements appear as they are.

  Further, in such an LED light emitting device, when no light is emitted, the LED element can be seen through a lens disposed on the LED element, but the two LED elements are provided with phosphors of different colors. In the LED light-emitting device, two different color portions were seen, and there was a problem in appearance.

  An object of the present invention is to provide an LED light-emitting device that solves the above-described problems, has good color mixing at the time of light emission, and looks uniform in appearance when not emitting light.

  A substrate, an LED light source disposed on the substrate, and a reflection frame disposed on a side of the LED light source on the substrate, the LED light source disposed on the substrate and emitting light toward the side reflection frame Is arranged on the substrate across the side-emitting LED element so as not to block at least a part of the emitted light from the side-emitting LED element on the side-emitting LED element and the upper side of the side-emitting LED element And an upper LED element that outputs light of a color different from that of the side-emitting LED element, and the reflecting frame is arranged to reflect the light output from the side-emitting LED element upward The LED light-emitting device characterized by this is provided.

  The LED light emitting device further includes an LED light source and a lens disposed on the upper part of the reflection frame, the upper LED element outputs light toward the lens, and the reflection frame lenses the light output from the side-emitting LED element. It is preferable to reflect to the side.

  The side-emitting LED element preferably has a reflective layer disposed on the upper surface of the sealing resin of the LED portion.

  It is preferable that the upper LED element has a leg portion located on both sides of the side-emitting LED element on the substrate, a light emitting portion supported by the leg portion, and a sealing resin for sealing the light emitting portion.

  Further, the upper LED element has two legs, and the light emitted from the side-emitting LED element to the two sides in two directions different by 180 degrees is reflected by the reflection frame, or the upper LED element has four legs. It is preferable that the light which has a leg part and is emitted from the side emission type LED element to the four directions different from each other by 90 degrees is reflected by the reflection frame.

  The lens has a first plurality of inclined surfaces that refract light that is emitted obliquely upward from the upper LED element and incident on the lens, on the side close to the side-emitting LED element and the upper LED element; It has a concavo-convex shape composed of a plurality of second inclined surfaces that totally reflect the refracted light from the inclined surface and refract the light emitted from the side-emitting LED element and reflected by the reflecting frame and incident on the lens. Is preferred.

  Further, the lens has a plurality of horizontal planes that refract the incident light from the side-emitting LED element and the upper LED element and emit them obliquely above the lens on the side opposite to the side-emitting LED element and the upper LED element, and the incident It is preferable to further have a second concavo-convex shape composed of a plurality of third inclined surfaces that refract light and emit the light vertically above the lens.

  According to the LED light emitting device, the color mixture at the time of light emission is good, and the appearance at the time of non-light emission looks uniform.

1 is a perspective view of an LED light emitting device 1. FIG. 1 is a projection view of an LED light emitting device 1. FIG. 3 is a projection view of a side-emitting LED element 30. FIG. 5 is a diagram showing a manufacturing process of the side-emitting LED element 30. FIG. 4 is a projection view of the upper LED element 40. FIG. It is a projection view of the LED light source part 20 containing the side emission type LED element 30 and the upper LED element 40 arrange | positioned on it. 2 is a perspective view of an LED light source unit 21. FIG. 2 is a perspective view of an LED light emitting device 2. FIG. FIG. 3 is a cutaway perspective view of an LED light emitting device 2. 2 is a partially enlarged cross-sectional view of a lens member 50. FIG. 2 is a perspective view of an LED light emitting device 3. FIG. 3 is a cutaway perspective view of an LED light emitting device 3. FIG. It is a partial expanded sectional view of lens member 50 ''. It is a perspective view of LED light-emitting device 4. FIG.

  Hereinafter, an LED light-emitting device and a manufacturing method thereof will be described with reference to the drawings. However, it should be understood that the present invention is not limited to the drawings or the embodiments described below. It should be noted that in the drawings, the dimensional ratio is not the same as the actual one in order to facilitate explanation of the invention.

  FIG. 1 is a perspective view of the LED light emitting device 1. 2A and 2B are projection views of the LED light-emitting device 1, wherein FIG. 2A is a top view and FIG. 2B is a side view.

  The LED light emitting device 1 includes a substrate 11, reflecting members 12 </ b> A and 12 </ b> B, a lens member 13, and an LED light source unit 20. The LED light-emitting device 1 is a light-emitting device that can be used for, for example, an LED light source for flash photography of a mobile phone or an LED light source for illumination. In the following description, the side on which the lens member 13 is positioned with respect to the substrate 11 (the side opposite to the substrate 10 when viewed from the LED light source unit 20) is upward, and the reflective member 12A with respect to the LED light source unit 20 on the surface of the substrate 11 And the side where 12B is located is called a side.

  The board | substrate 11 is an insulator board | substrate with which the electrode and the wiring pattern were formed in the surface and the back surface, for example, is a board | substrate made from a ceramic or glass epoxy. The reflecting members 12A and 12B are members having a trapezoidal cross section, and are disposed on the substrate 11 so that the slopes face each other with the LED light source unit 20 interposed therebetween, thereby constituting a reflecting frame. The opposing inclined surfaces of the reflecting members 12A and 12B are high-reflectance surfaces that reflect upward the light emitted from the LED light source unit 20 to the side. The reflecting members 12A and 12B are made of a material having a high reflectivity such as aluminum or a resin, and are subjected to a reflection process of depositing a metal such as silver on a slope portion.

  The lens member 13 is made of a transparent material, and the upper surface or the lower surface or both surfaces are, for example, a spherical lens surface 14 and function as a lens. It is also possible to use a Fresnel lens instead of a spherical lens. The LED light source unit 20 includes a side-emitting LED element 30 and an upper LED element 40.

  FIG. 3 is a projected view of the side-emitting LED element 30, showing a top view, a back view, two side views, and three cross-sectional views. The side-emitting LED element 30 includes electrodes 31A and 31B, an insulating portion 32, an LED 33, a resin frame 34, and a white resin layer 35.

  The electrodes 31 </ b> A and 31 </ b> B are electrodes for electrically connecting the side-emitting LED element 30 to the substrate 11. The insulating part 32 is a linear member sandwiched between the electrode 31A and the electrode 31B, and insulates the electrode 31A and the electrode 31B.

  The LED 33 is mounted on the electrode 31A and the electrode 31B so as to straddle the insulating portion 32. The resin frame 34 is a rectangular frame-shaped member formed so as to surround the LED 33 on the upper surfaces of the electrode 31 </ b> A, the electrode 31 </ b> B, and the insulating portion 32, and contains a phosphor that converts the wavelength of light emitted from the LED 33. The resin frame 34 is exposed on two opposing side surfaces of the side-emitting LED element 30, and the other side surface and upper surface of the resin frame 34 are covered with a white resin layer 35. The white resin layer 35 is formed so as to cover the upper surface of the side-emitting LED element 30 and the two side surfaces where the resin frame 34 is not exposed.

  In the side emission type LED element 30, most of the light generated by the LED 33 is reflected by the white resin layer 35, passes through the resin frame 34 containing the phosphor, and is converted into light of a predetermined color (wavelength) by the phosphor. Then, the light is emitted from the two side surfaces where the resin frame 34 is exposed. As described above, the side-emitting LED element 30 emits most of light in two opposite directions. For example, the emission wavelength of the LED 33 and the phosphor mixed in the resin frame 34 are selected so that the side-emitting LED element 30 outputs (emits) amber light.

  FIG. 4 is a view showing a manufacturing process of the side-emitting LED element 30, and shows a cross-sectional view and a top view in each process. With reference to FIG. 4, the manufacturing process of the side emission type LED element 30 is demonstrated.

  First, as shown in FIG. 4A, a mounting board on which the LEDs 33 are placed is prepared. The mounting substrate is a flat plate having two electrodes 31A and 31B that are electrically connected to the LED 33 to be placed, and an insulating portion 32 that insulates between them. Next, as shown in FIG. 4B, a resin containing a phosphor is applied around the LED 33 on the mounting substrate, and a resin frame 34 is formed around the LED 33 so as to have the same width as the mounting substrate. To do. Further, as shown in FIG. 4C, a white resin layer 35 is formed on the LED 33 and the resin frame 34.

  Subsequently, as shown in FIG. 4D, along the two opposing sides (one of the two sets) of the LED 33, a part of the resin frame 34 and the white resin layer 35 is formed by half dicing. Remove. At this time, the resin frames 34 on the two sides may remain slightly due to processing. Further, as shown in FIG. 4E, a white resin layer 35 is formed on the removed resin frame 34. The white resin added at this time is integrated with the original white resin layer 35 to form a U-shaped white resin layer 35. As described above, the side-emitting LED element 30 shown in FIG. 3 is manufactured.

  FIG. 5 is a projection view of the upper LED element 40, showing a top view, a back view, two side views, and three cross-sectional views. The upper LED element 40 includes electrodes 41 </ b> A and 41 </ b> B, an insulating part 42, an LED 43, a white resin layer 44, and a resin layer 45.

  The electrodes 41 </ b> A and 41 </ b> B are electrodes for electrically connecting the upper LED element 40 to the substrate 11. The insulating part 42 is a linear member sandwiched between the electrode 41A and the electrode 41B, and insulates the electrode 41A and the electrode 41B. The electrodes 41A and 41B correspond to the two legs of the upper LED element 40. Further, the electrode 41A, the electrode 41B, and the insulating portion 42 correspond to the mounting substrate of the LED 43, and constitute a U-shaped leg portion in which two opposing side surfaces are opened.

  The LED 43 is mounted on the electrode 41A and the electrode 41B so as to straddle the insulating portion. The white resin layer 44 is formed in a region other than the LED 43 on the upper surfaces of the electrode 41A, the electrode 41B, and the insulating portion 42 so as to cover the four side surfaces of the LED 43. The resin layer 45 is a flat plate-like member that covers the upper surface of the LED 43, and contains a phosphor that converts the wavelength of light emitted from the LED 43. In the upper LED element 40, the thicknesses of the white resin layer 44 and the resin layer 45 are adjusted so that the upper surfaces thereof are on the same plane.

  In the upper LED element 40, the four sides of the LED 43 are covered with the reflective white resin layer 35, so that most of the light generated by the LED 43 passes through the phosphor-containing resin layer 45 and is predetermined by the phosphor. It is converted into light of a color (wavelength) and emitted from the upper surface of the resin layer 45. Thus, the upper LED element 40 emits most of the light upward. The emission wavelength of the LED 43 and the phosphor mixed into the resin layer 45 are selected so that the upper LED element 40 outputs (emits) white light, for example.

  When manufacturing the upper LED element 40, first, a mounting substrate of the LED 43 is manufactured. For example, such a mounting substrate is formed by processing a thick substrate composed of the electrodes 41A and 41B and the insulating portion 42 so as to remove the lower part in the center, or forming a thin substrate composed of the electrodes 41A and 41B and the insulating portion 42 on the electrodes 41A and 41A. It is manufactured by connecting rectangular parallelepipeds corresponding to the legs of 41B. Next, the LED 43 is mounted on the mounting board as described above so as to be electrically connected to the electrodes 41A and 41B, and the white resin layer 44 is formed with a thickness that covers the periphery of the LED 43 and the LED 43 thinly on the mounting board. To do. Then, the white resin layer 44 on the upper surface of the LED 43 is removed by half dicing, and a phosphor-containing resin layer 45 is formed in the removed portion. As described above, the upper LED element 40 shown in FIG. 5 is manufactured.

  FIG. 6 is a projection view of the LED light source unit 20 including the side-emitting LED element 30 and the upper LED element 40 disposed thereon, and shows a top view, a back view, and two side views. As shown in FIGS. 1, 2, and 6, the side-emitting LED element 30 is disposed so as to enter a U-shaped space formed by the electrodes 41 </ b> A and 41 </ b> B of the upper LED element 40. Specifically, the side-emitting LED element 30 is fixed so that the electrodes 31 </ b> A and 31 </ b> B are connected to corresponding electrodes on the substrate 11. Next, the upper LED element 40 is fixed so that the electrodes 41 </ b> A and 41 </ b> B are connected to corresponding electrodes on the substrate 11 so as to straddle the side-emitting LED element 30. In other words, the upper LED element 40 is disposed so as to straddle the side-emitting LED element.

  As shown in FIG. 2B, the light emitted upward from the upper LED element 40 is directed to the lens member 13 as it is, and the light emitted laterally from the side-emitting LED element 30 is reflected by the reflecting member 12A. And it is reflected by the slope of 12B and goes to the upper lens member 13. The light emitted from the side-emitting LED element 30 in the two lateral directions is reflected by the opposite surface of the reflection frame and emitted from the lens surface 14, and is emitted with a symmetrical light distribution. The light from the upper LED element 40 is also emitted uniformly upward. In this way, the light from the side-emitting LED element 30 and the light from the upper LED element 40 are emitted with an equal light distribution, respectively, so that an even light distribution, that is, good color mixing is achieved on the irradiated surface.

  Further, when the LED light source unit 20 is viewed through the lens surface 14 when no light is emitted, the resin layer 45 containing the phosphor of the upper LED element 40 is visible at the center, and both sides of the side-emitting LED element are adjacent to both sides thereof. The exposed portion of the resin frame 34 containing the phosphor is visible. The colors of the resin layer 45 and the resin frame 34 when not emitting light appear to be different colors because of the different types of phosphors, but they appear close to each other and are the two parts of the same color (exposed portions of the resin frame 34). Since portions of different colors (resin layer 45) can be seen in between, they appear almost uniform. Thereby, the appearance of the LED light emitting device is improved.

  In the LED light source unit 20, the side-emitting LED element 30 emits light in two opposite directions, but may emit light in more directions. The side-emitting LED element 30 of the LED light source unit 21 to be described next emits light in four directions that differ by 90 degrees.

  FIG. 7 is a perspective view of the LED light source unit 21. In FIG. 7, the same reference numerals are assigned to the same parts as the LED light source unit 20. The LED light source unit 21 is different from the LED light source unit 20 in the shape of the leg of the upper LED element 40 and the light emission direction of the side-emitting LED element 30, but has the same configuration as the LED light source unit 20 in other points. Have.

  The upper LED element 40 has legs 41AA, 41AB and 41BA shown in FIG. 7 and another leg (not shown). That is, the leg portion of the upper LED element 40 is not a U-shape but four legs. Therefore, the leg part of the upper LED element 40 passes the light which goes to 90 degrees mutually different directions among the lights radiate | emitted from the side emission type | mold LED element 30 to all the azimuth | directions. The method of creating the upper LED element 40 is the same as that of the LED light source unit 20, and only the shape of the leg is changed.

  The side-emitting LED element 30 emits light in all directions, not in two lateral directions. In order to produce such a side-emitting LED element 30, for example, the resin frame 34 around the LED 33 may be left as it is without performing the steps (D) and (E) of FIG.

  In the LED light-emitting device using the LED light source unit 21, for example, four reflection members similar to the reflection members 12A and 12B are provided in four directions different from each other by 90 degrees. In this case, the reflecting member may be integrally formed as a part of the quadrangular pyramid and the inclined surface may be used as the reflecting surface. Moreover, you may form a reflection member as a part of cone.

  In the LED light emitting device that uses the LED light source unit 21, the light emitted upward from the upper LED element 40 is directed to the lens member 13 as in the LED light emitting device 1, and from the side-emitting LED element 30, The light emitted in the four directions is reflected by the reflecting surface of the reflecting member and travels toward the lens member 13. For this reason, the distribution of the emitted light becomes more uniform, and the light distribution on the irradiated surface, that is, the color mixing is further improved. The improvement of the appearance of the LED light emitting device is the same as that of the LED light emitting device 1.

  FIG. 8 is a perspective view of the LED light emitting device 2. FIG. 9 is a cutaway perspective view of the LED light emitting device 2. The LED light emitting device 2 includes a substrate 11, a reflecting member 12, an LED light source unit 20, and a lens member 50. Among these, the board | substrate 11 and the LED light source part 20 are the same as the thing of the LED light-emitting device 1. FIG. The LED light source unit 20 of the LED light emitting device 2 is also composed of two types of side emission type LED elements 30 and upper LED elements 40 described above. In the LED light emitting device 2, the reflection member (reflection frame) 12 having the same reflection surface as the reflection members 12 </ b> A and 12 </ b> B described above is disposed so as to surround the entire periphery of the LED light source unit 20. A lens member 50 is disposed on the light source unit 20.

  The lens member 50 has a flat base 51 having the same vertical and horizontal length as the substrate 11 and a smaller size in the horizontal direction than the base 51, and is arranged centered on the center of the base 51. And a circular portion 52. The base part 51 and the circular part 52 are integrally formed. In addition, the lens member 50 has a concentric concavo-convex shape 53 on the lower surface side (side closer to the side-emitting LED element 30 and the upper LED element 40) of the base part 51 that is an incident surface of light from the LED light source part 20. This is a Fresnel lens.

  FIG. 10 is a partially enlarged cross-sectional view of the lens member 50. The upper side of the lens member 50 shown in FIG. 10 corresponds to the upper surface of the circular portion 52, and the lower side corresponds to the lower surface of the base portion 51. In FIG. 10, the left side is close to the central portion of the LED light emitting device 2 (directly above the upper LED element 40), and the right side is close to the outer peripheral portion of the LED light emitting device 2 (directly above the reflecting member 12).

  The uneven shape 53 of the lens member 50 is composed of a plurality of inclined surfaces 61 and 62 formed alternately. On the other hand, the upper surface of the lens member 50 is a horizontal plane 65. The inclined surface 61 is an example of a first plurality of inclined surfaces, and from the center side to the outer peripheral side of the LED light emitting device 2 toward the lower side of the lens member 50 so that light from the upper LED element 40 can enter. Inclined. The inclined surface 61 refracts light that is emitted obliquely upward from the upper LED element 40 and enters the lens member 50. The inclined surface 62 is an example of a second plurality of inclined surfaces, and the outer peripheral side of the LED light emitting device 2 is directed toward the lower side of the lens member 50 so that light from the side-emitting LED element 30 can enter. It inclines to the center side (namely, the opposite side to the inclined surface 61). The inclined surface 62 totally reflects the refracted light from the inclined surface 61 and refracts the light emitted from the side-emitting LED element 30 and reflected by the reflecting member 12 and incident on the lens member 50.

  For example, the light rays L1 and L2 shown in FIG. 10 are directly refracted and incident on the lens member 50 from the upper LED element 40 through the inclined surface 61, and are totally reflected by the inclined surface 62 and propagate through the lens member 50. Then, the light is refracted again at the horizontal plane 65 and emitted obliquely upward from the lens member 50. Light rays L3 and L4 are emitted from the side-emitting LED element 30, reflected by the reflecting member 12, incident on the lens member 50 at the inclined surface 62 and refracted, and propagated through the inside of the lens member 50. The light is refracted again by the upper horizontal surface 65 and emitted obliquely upward from the lens member 50.

  As described above, the incident surface of the lens member 50 has the inclined surface 61 on which the light from the upper LED element 40 is incident and the inclined surface 62 on which the light from the side-emitting LED element 30 is incident. By making the incident surface of the lens member 50 into a Fresnel shape, the LED light emitting device 2 uses one lens member 50 as a refractive lens and TIR lens corresponding to both the side-emitting LED element 30 and the upper LED element 40. To do.

  Since the exit surface of the lens member 50 is a flat horizontal surface 65, the exit light from the lens member 50 spreads obliquely upward. For example, a light source for flash photography is required to be able to illuminate not only the front but also the outer periphery. The LED light emitting device 2 is suitable for use as an LED light source for flash photography because the emitted light passing through the lens member 50 spreads obliquely upward.

  FIG. 11 is a perspective view of the LED light emitting device 3. FIG. 12 is a cutaway perspective view of the LED light-emitting device 3. Except for the uneven shape of the lens member, the configuration of the LED light emitting device 3 is the same as that of the LED light emitting device 2.

  The lens member 50 ′ of the LED light emitting device 3 has a concave and convex shape 53 ′ on the lower surface side like the lens member 50 of the LED light emitting device 2, but the concave and convex shape 53 ′ is not concentric but on one side of the substrate 11. It is formed in parallel straight lines. That is, the lens member 50 ′ is a linear Fresnel lens having a linear concavo-convex shape 53 ′ on the lower surface side of the base portion 51, which is a light incident surface from the LED light source unit 20. The lens member 50 ′ has the same cross section as that of the lens member 50 shown in FIG. 10 except for the difference in whether the concavo-convex shape is concentric or linear. The concavo-convex shape 53 ′ is also composed of inclined surfaces similar to the inclined surfaces 61 and 62 shown in FIG. 10. The light path from the LED light source unit 20 is the same as that described with reference to FIG. As in the lens member 50 ′, the uneven shape is not limited to a concentric shape, and may be a straight shape.

  FIG. 13 is a partially enlarged sectional view of the lens member 50 ″. The lens member 50 ″ has a concentric concave-convex shape 53 on the lower surface side close to the side-emitting LED element 30 and the upper LED element 40, and a concentric circle on the upper surface side opposite to the side-emitting LED element 30 and the upper LED element 40. Fresnel lenses each having a concavo-convex shape 54. The lens members 50 and 50 'have a concavo-convex shape only on the lower surface side, but the lens member of the LED light-emitting device has a concavo-convex shape on both the upper surface side and the lower surface side like the lens member 50' '. You may have. In FIG. 13, as in FIG. 10, the left side is close to the central portion of the LED light emitting device (directly above the upper LED element 40), and the right side is close to the outer peripheral portion of the LED light emitting device (directly above the reflecting member 12).

  The concavo-convex shape 53 is the same as that of the lens member 50 and is composed of a plurality of inclined surfaces 61 and 62 formed alternately. The uneven shape 54 is an example of a second uneven shape, and is configured by repeating an inclined surface 63, an inclined surface 64, and a horizontal surface 65. The inclined surface 63 is an example of a third plurality of inclined surfaces, and is inclined from the center side to the outer peripheral side of the LED light-emitting device toward the lower side of the lens member 50 ″. The inclined surface 64 is an example of a third plurality of inclined surfaces, and is inclined from the outer peripheral side of the LED light emitting device toward the center side (that is, the side opposite to the inclined surface 63) as it goes to the lower side of the lens member 50 ''. doing. The inclined surfaces 63 and 64 refract the light that has entered from the side-emitting LED element 30 and the upper LED element 40 and propagated through the lens member 50, and emits the light vertically above the lens member 50 ''. The horizontal plane 66 refracts light that has entered the lens member 50 ″ and propagated through the lens member 50 ″, and emits the light obliquely above the lens member 50 ″.

  For example, the light beam L1 shown in FIG. 13 directly enters the lens member 50 ″ from the upper LED element 40 through the inclined surface 61 and is refracted, and is totally reflected by the inclined surface 62 and propagates through the lens member 50 ″. Then, the light is refracted again by the upper inclined surface 63 and is emitted vertically above the lens member 50 ″. The light beam L3 is emitted from the side-emitting LED element 30, reflected by the reflecting member 12, is incident on the lens member 50 '' by the inclined surface 62, is refracted, and propagates through the lens member 50 ''. Thereafter, the light is refracted again by the upper inclined surface 64 and is emitted vertically above the lens member 50 ″.

  On the other hand, the light beam L2 shown in FIG. 13 is incident on the lens member 50 ″ from the upper LED element 40 through the inclined surface 61 and is totally reflected by the inclined surface 62 from the upper LED element 40 as in the case of the light beam L1. The light is refracted and emitted obliquely upward from the lens member 50 ″. Similarly to the light beam L2, the light beam L4 is emitted from the side-emitting LED element 30, reflected by the reflecting member 12, and incident on the lens member 50 ″ by the inclined surface 62. Thereafter, the light beam L4 again enters the upper horizontal surface 66. The light is refracted and emitted obliquely upward from the lens member 50 ″.

  Since the lens member 50 ″ has the concave and convex shape 54 on the emission surface, the emitted light can be divided into those that go vertically upward and those that go diagonally upward. Therefore, in the LED light emitting device using the lens member 50 ″, both the front surface and the outer periphery thereof can be illuminated brightly. By adjusting the shape of the uneven shape 54, light can be emitted in a desired direction.

  In FIG. 13, the vertical direction is the angle reference (0 degree), the angle when tilted to the right side of the figure is a positive value, and the angle when tilted to the left side of the figure is a negative value. When the value of the angle is defined in this way, as an example, in the lens member 50 ″ shown in FIG. 13, the inclined surfaces 61 to 64 have sizes of −20 degrees, +45 degrees, −58 degrees, and +58 degrees, respectively. Have That is, in the inclined surface 61 and the inclined surface 62, the inclined surface 62 has a larger absolute value of the angle with respect to the vertical direction, and the inclination is gentler. The slopes of the inclined surface 63 and the inclined surface 64 are the same.

  In the LED light emitting device using the lens member 50 ″, the angle of the reflecting surface of the reflecting member 12 is adjusted so that light is emitted in a desired direction. For example, it is assumed that light emitted from the lens member 50 ″ in directions of 0 degrees and ± 37.5 degrees is necessary. In this case, the light beams L1 and L2 from the upper LED element 40 enter the inclined surface 61 at 45 degrees, and the light beams L3 and L4 emitted from the side-emitting LED element 30 and reflected by the reflecting member 12 have an inclined surface of -11 degrees. It is only necessary that the light enters the lens member 62 and propagates within the lens member 50 ″ at ± 23.7 degrees. Therefore, the angle of the reflecting surface of the reflecting member 12 is adjusted so that the light beams L3 and L4 enter the lens member 50 '' at -11 degrees. That is, the TIR light incident from the upper LED element 40 and the refracted light incident from the side-emitting LED element 30 are the same in angle with respect to the vertical direction (normal direction) in the lens member 50 ″. The incident angle of the refracted light is adjusted so that it propagates in an inclined direction.

  Similarly to the LED light-emitting device 1, the LED light-emitting devices using the LED light-emitting devices 2 and 3 and the lens member 50 ″ have a uniform distribution of emitted light, improve color mixing at the time of light emission, and at the time of non-light-emitting time. There is an effect that the appearance looks uniform. In addition, since the upper LED element 40 is disposed across the side-emitting LED element 30, even if it has two elements, the size of the light emitting region is larger than when they are arranged in the horizontal direction. There is also an effect that becomes smaller.

  FIG. 14 is a perspective view of the LED light-emitting device 4. Unlike the LED light-emitting device described so far, the LED light-emitting device 4 does not have a lens member, but otherwise has the same configuration as the LED light-emitting device 1. Like the LED light-emitting device 4, the LED light-emitting device does not necessarily have a lens member. In the LED light emitting device 4, the light from the upper LED element 40 is directed upward and emitted uniformly. The light from the side-emitting LED element 30 is reflected by the inclined surfaces of the reflecting members 12A and 12B, travels upward, and exits with a symmetrical light distribution. Also in the LED light-emitting device 4, the configuration of the reflecting members 12 </ b> A and 12 </ b> B and the LED light source unit 20 is the same as that of the LED light-emitting device 1. It becomes a mixed color. Further, the appearance of the LED light emitting device 4 is improved as in the case of the LED light emitting device 1.

  As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that various modifications are possible. For example, in the side-emitting LED element 30 in the LED light source unit 21 of FIG. 7, the resin frame 34 is not exposed over the entire circumference of the side surface, but the white resin layer 35 is provided at four corners, and the four directions therebetween The resin frame 34 may be exposed only on the surface. In addition, an uneven shape similar to the uneven shape 54 of the lens member 50 ″ in FIG. 13 may be provided on the upper surface of the lens member 50 ′ in FIG. 11. Further, any of the lens members 50, 50 ′ and 50 ″ may be attached to the LED light emitting device having the LED light source unit 21.

1, 2, 3, 4 LED light emitting device 11 Substrate 12, 12A, 12B Reflective member 13, 50, 50 ', 50''Lens member 14 Lens surface 20, 21 LED light source 30 Side emission LED element 40 Upper LED element 53, 53 ', 54 Uneven shape 61, 62, 63, 64 Inclined surface 65, 66 Horizontal plane

Claims (8)

A substrate,
An LED light source disposed on the substrate;
A reflective frame disposed on a side of the LED light source on the substrate,
The LED light source is
A side-emitting LED element that is disposed on the substrate and outputs light toward the side reflection frame;
The side-emitting LED element is disposed on the substrate across the side-emitting LED element so as not to block at least a part of the light emitted from the side-emitting LED element on the upper side of the side-emitting LED element. An upper LED element that outputs light of a color different from that of the LED element upward,
The LED light-emitting device, wherein the reflection frame is disposed so as to reflect light output from the side-emitting LED element upward. A lens disposed on the LED light source and the reflection frame;
The upper LED element outputs light toward the lens,
The LED light-emitting device according to claim 1, wherein the reflection frame reflects light output from the side-emitting LED element toward the lens.   The LED light emitting device according to claim 2, wherein the side-emitting LED element has a reflective layer disposed on an upper surface of a sealing resin of an LED unit. The upper LED element is
Legs located on both sides of the side-emitting LED element on the substrate;
A light emitting part supported by the leg part;
The LED light-emitting device according to claim 2, further comprising: a sealing resin that seals the light-emitting portion. The upper LED element has two legs,
The LED light-emitting device according to claim 4, wherein light directed in two directions different from each other by 180 degrees emitted laterally from the side-emitting LED element is reflected by the reflection frame. The upper LED element has four legs,
The LED light-emitting device according to claim 4, wherein the light emitted from the side-emitting LED element and directed in four directions different from each other by 90 degrees is reflected by the reflection frame. The lens is close to the side-emitting LED element and the upper LED element.
A plurality of first inclined surfaces for refracting light emitted obliquely upward from the upper LED element and incident on the lens;
A second plurality of inclined surfaces for totally reflecting the refracted light from the first plurality of inclined surfaces and for refracting the light emitted from the side-emitting LED element and reflected by the reflecting frame and incident on the lens; ,
The LED light-emitting device according to claim 2, wherein the LED light-emitting device has a concavo-convex shape constituted by: The lens is opposite to the side-emitting LED element and the upper LED element,
A plurality of horizontal surfaces that refract incident light from the side-emitting LED element and the upper LED element and emit the light obliquely above the lens;
A plurality of inclined surfaces that refract the incident light and emit it vertically above the lens;
The LED light-emitting device according to claim 7, further comprising a second uneven shape configured by:

Images