JP2018082170A - Optical member and light-emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens to be used for a light-emitting device having a reflective member, which suppresses the increase in the device size of the light-emitting device and enables the enhancement of the condensibility of light emitted from a light-emitting element.SOLUTION: An optical member (14, 24) comprises, from a center side in turn, a first lens part (15A) for condensing light emitted from a light-emitting element, a TIR lens part (15B) for condensing light emitted from the light-emitting element by utilizing internal reflection, and a second lens part (15C) for condensing light emitted from the light-emitting element and reflected by a reflective member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optical member and a light emitting device having a light emitting element.

  A light emitting device using a light emitting element such as an LED (light-emitting diode) element is widely used for a flash device of a camera in a portable terminal or the like, a backlight of a color display device, illumination, or the like.

  In particular, in recent years, the periphery of the light emitting element is covered with a reflecting member, and while the light emitted to the side of the light emitting element is reflected upward, the upper part of the light emitting element is covered with an optical member such as a lens, so Enhanced light emitting devices are used.

  For example, Patent Document 1 includes an optical semiconductor element on a substrate and a reflector that is provided around the optical semiconductor element and reflects light from the optical semiconductor element in a predetermined direction, and a lens is provided on the reflector. The described semiconductor light emitting device is described.

JP2015-129308A

  In order to improve the light collecting property of the light emitted from the light emitting element, it is necessary to enlarge the lens in accordance with the region from which the light is emitted. The size will increase. However, since the light emitting device is also used for a portable terminal or the like, downsizing is required.

  An object of the present invention is to enable a light-emitting device having a reflecting member and a lens to improve the light collecting property of light emitted from a light-emitting element while suppressing an increase in the size of the light-emitting device.

  The first optical member according to the present invention, in order from the center, condenses light emitted from the light emitting element and condenses the light emitted from the light emitting element using internal reflection. And a second lens part for condensing the light emitted from the light emitting element and reflected by the reflecting member.

  In the second optical member according to the present invention, it is preferable that the second optical member further includes a transmissive portion that passes the light emitted from the light emitting element and reflected by the reflecting member as it is, outside the second lens portion.

  A first light-emitting device according to the present invention includes the first optical member according to the present invention, and is disposed on the substrate so as to cover the periphery of the substrate, the light-emitting element mounted on the substrate, and the light-emitting element. A reflecting member, and the optical member is disposed above the light emitting element, and the optical element has a first lens portion, a TIR lens portion, and a second lens portion on a surface facing the light emitting element. It is characterized by.

  A second light emitting device according to the present invention includes the second optical member according to the present invention, and is disposed on the substrate so as to cover the substrate, the light emitting element mounted on the substrate, and the periphery of the light emitting element. A reflecting member, and the optical member is disposed above the light emitting element, and the optical element has a first lens part, a TIR lens part, and a second lens part on a surface facing the optical element. The reflecting member includes a first reflecting surface that reflects light incident from the light emitting element toward the second lens portion, and a second reflecting surface that reflects light incident from the light emitting element toward the transmitting portion in the vertical direction. It is characterized by having.

  In the light emitting device according to the present invention, the optical member emits light emitted from the first lens unit, the TIR lens unit, and the second lens unit on the back surface of the surface on which light is incident from the light emitting element, in the vertical direction of the optical member. It is preferable to further include a prism portion for refracting in a predetermined direction.

  In the light emitting device according to the present invention, the surface of the light emitting element facing the optical member has at least an electrode pad for connecting to the wire, a first wiring electrode connected to the electrode pad, and a first wiring electrode. A second wiring electrode that is partially wide is provided, and the optical member is disposed with respect to the light emitting element so that the direction in which the second wiring electrode extends is substantially the same as a predetermined direction. Is preferred.

  In the light emitting device according to the present invention, the reflecting member preferably has an opening provided with a notch for arranging a wire connecting the light emitting element and the electrode arranged on the substrate.

  In the light emitting device according to the present invention, the upper part of the reflecting member is dammed with the convex part for applying the adhesive for bonding the optical member, and the adhesive disposed and applied around the convex part. It is preferable that a frame member is provided.

  ADVANTAGE OF THE INVENTION According to this invention, in the light-emitting device which has a reflecting member and a lens, it becomes possible to improve the condensing property of the light radiate | emitted from the light emitting element, suppressing the increase in the apparatus size of a light-emitting device.

(A) is a perspective view of the light-emitting device 10, (B) is its A-A 'sectional view, and (C) is its plan view. (A) and (B) are perspective views of the optical member 14, and (C) is a cross-sectional view of the light emitting device 10. 3 is a cross-sectional view of a reflecting member 13. FIG. (A) and (B) are perspective views of the reflecting member 13. (A) is a top view of the light emitting element 12, (B) is the side view. (A) is a perspective view of the component assembly 114, (B) is a plan view thereof, and (C) is a bottom view thereof. (A) is a perspective view of the component assembly 113, (B) is a plan view thereof, and (C) is a bottom view thereof. (A) is an enlarged view of the component assembly 113, and (B) is a schematic diagram of the component assembly 113. It is a schematic diagram of component assembly 113 '. (A) is a perspective view of the component assembly 113 and the component assembly 114, and (B) is an enlarged view thereof. (A) is a schematic diagram of the component assembly 113, and (B) is a schematic diagram of the reflecting member 13 and the optical member 14. (A) is a schematic diagram of the component assembly 111 and the component assembly 112, and (B) is a schematic diagram of the light emitting device 10. (A) is the perspective view of the light-emitting device 20, (B) is the sectional drawing, (C) is the top view.

  Hereinafter, a light emitting device according to the present invention will be described in detail with reference to the accompanying drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1A is a schematic perspective view of the light emitting device 10. 1B is a cross-sectional view taken along the line A-A ′ of FIG. FIG. 1C is a plan view of the light emitting device 10 as viewed from above.

  The light emitting device 10 includes a substrate 11, a light emitting element 12, a reflecting member 13, and an optical member 14.

  The substrate 11 is an insulating substrate such as a glass epoxy substrate, a BT resin substrate, a ceramic substrate, or a metal core substrate on which the light emitting element 12 is mounted on the surface. On the substrate 11, a wiring layer on which the anode electrode 11A, the cathode electrode 11B, a circuit pattern, and the like are formed is formed. The anode electrode 11A is connected to the light emitting element 12 via a conductive adhesive material such as Ag paste, and the cathode electrode 11B is connected to the light emitting element 12 via a wire 11C formed by wire bonding. The anode electrode 11A and the cathode electrode 11B extend to the lower surface (surface opposite to the surface on which the wiring layer is formed) of the substrate 11 through the substrate 11 so as to be connected to an external DC (Direct Current) power source. doing.

  The light emitting element 12 is a blue semiconductor light emitting element (blue LED element), and is mounted on the substrate 11. For the light emitting element 12, for example, an InGaN-based compound semiconductor having an emission wavelength range of 440 to 455 nm is used. The light emitting element 12 is formed in a rectangular shape. On the light emitting surface of the LED element 12, the phosphor layer 12A is placed and fixed by adhesion using a transparent adhesive or the like.

  The phosphor layer 12 </ b> A includes a colorless and transparent resin such as an epoxy resin or a silicon resin, and covers the upper surface of the light emitting element 12. In the phosphor layer 12A, a particulate phosphor material that absorbs blue light emitted from the light emitting element 12 and converts the wavelength into yellow light is dispersed and mixed. The range of the peak wavelength of the light wavelength-converted by the phosphor material dispersed and mixed in the phosphor layer 12A is 535 to 570 nm. As this phosphor material, for example, a YAG (yttrium, aluminum, garnet) phosphor activated by cerium is used. The phosphor layer 12 </ b> A is formed in the same shape as the light emitting element 12 when viewed from above, and is formed in a rectangular shape like the light emitting element 12.

  The reflection member 13 is a reflection frame made of molded resin, and is disposed on the substrate 11 so as to cover the periphery of the light emitting element 12. The reflecting member 13 is a substantially rectangular frame having a mortar-shaped first opening 13A. The reflection member 13 is formed of a resin base, and has a reflection film formed by plating on the base. The side surface on the inner side (opening 13A side) of the reflecting member 13 is inclined, and the side surface transmits light emitted from the phosphor layer 12A of the light emitting element 12 to the side above the light emitting device 10 (light emitting element). The light is reflected toward the phosphor layer 12 </ b> A side when viewed from 12. The plating may be wet plating such as electroplating or chemical plating, or may be dry plating such as vacuum deposition, chemical vapor deposition (CVD), or sputtering, and is not particularly limited.

  The optical member 14 is a lens integrally formed of a light transmissive material such as acrylic resin. The optical member 14 is disposed above the light emitting element 12 so as to block the first opening 13A of the reflecting member 13. The optical member 14 includes light emitted upward from the phosphor layer 12 </ b> A of the light emitting element 12, and light emitted laterally from the phosphor layer 12 </ b> A of the light emitting element 12 and reflected upward on the side surface of the reflecting member 13. Condensing. A space (gap) 16 is formed in a region surrounded by the optical member 14, the reflection member 13, the light emitting element 12, and the substrate 11, and light emitted from the light emitting element 12 reaches the optical member 14 through the space 16. .

  The optical member 14 has a prism portion 14C at the center. The prism portion 14C is formed in a circular shape on the back surface of the optical member 14 facing the light emitting element 12, and refracts light emitted from the light emitting element 12 in a predetermined direction with respect to the vertical direction of the optical member 14. Let The light emitting device 10 may be used as a flash device for an imaging device of a mobile terminal such as a mobile phone. In that case, generally, the light-emitting device 10 is arrange | positioned along with the imaging device which a portable terminal has. For example, when an imaging device of a portable terminal is used for iris authentication or the like, the user arranges the portable terminal so that his / her eyes are positioned in front of the imaging device in order to cause the imaging device to take an image of his / her eyes. Therefore, by arranging the light emitting device 10 so that the light emitted from the light emitting element 12 is refracted to the imaging device side, the light emitting device 10 can appropriately irradiate the user's eyes.

  2A is a perspective view of the optical member 14 in a state where it is removed from the reflecting member 13 from an obliquely upward direction, and FIG. 2B is an oblique view of the optical member 14 in a state where it is removed from the reflecting member 13. It is the perspective view seen from the downward direction. FIG. 2C is a cross-sectional view taken along the line A-A ′ of FIG. 1A when the reflecting member 13 and the optical member 14 are viewed from the lateral direction. 2A to 2C, the prism portion 14C is omitted for ease of explanation.

  As shown in FIGS. 2A to 2C, the optical member 14 includes, in order from the center side, a first lens portion 15A, a TIR (Total Internal Reflection) lens portion 15B, a second lens portion 15C, and a transmission portion 15D. Including.

  The first lens portion 15A is formed in a convex shape and condenses the light emitted from the light emitting element 12 (A1 in FIG. 2C). By the first lens portion 15A, it becomes possible to refract the light on the center side of the light emitted from the light emitting element 12 and to collect the light appropriately.

  The TIR lens portion 15B includes a first side surface 15B1, a second side surface 15B2, a third side surface 15B3, and a fourth side surface 15B4 in order from the center side of the optical member 14. The first side surface 15B1 is formed in a reverse mortar shape from the uppermost end position of the outer periphery of the first lens portion 15A downward and outward. The second side surface 15B2 is formed in a mortar shape from the lowest end position of the first side surface 15B1 upward and outward. The third side surface 15B3 is formed in a reverse mortar shape from the uppermost position of the second side surface 15B2 to the lower side and outward. The fourth side surface 15B4 is formed in a mortar shape from the lowest end position of the third side surface 15B3 upward and outward. The TIR lens unit 15B refracts the light emitted from the light emitting element 12 at the third side surface 15B3 and reflects the light upward at the fourth side surface 15B4 (A2 in FIG. 2C). In this way, the TIR lens unit 15B collects the light emitted from the light emitting element 12 using internal reflection. By condensing the light emitted from the light emitting element 12 by the TIR lens portion 15B, the light emitted from the center side of the light emitting element 12 toward the outside can be appropriately condensed while making the optical member 14 thinner. It becomes possible.

  The second lens portion 15C is formed in a mortar shape further upward and outward from the uppermost end position of the fourth side surface 15B4 of the TIR lens portion 15B. The second lens portion 15C collects the light emitted from the light emitting element 12 and reflected by the reflecting member 13 by refraction (A3 in FIG. 2C). By condensing the light reflected by the reflecting member 13 by the second lens portion 15C, it is possible to prevent the light reflected by the reflecting member 13 from being scattered.

  The transmission part 15D is formed substantially horizontally from the uppermost position of the second lens part 15C toward the outside. The transmissive portion 15D passes the light emitted from the light emitting element 12 and reflected by the reflecting member 13 as it is (A4 in FIG. 2C). The light reflected by the reflecting member 13 can be transmitted upward by the transmitting portion 15D, and the intensity of light output from the entire optical member 14 can be further increased.

  Here, the configuration of the reflecting member 13 will be described in more detail with reference to FIG. As described above, the reflecting member 13 includes the reflecting surface 13G having an inclination formed on the inner side surface from directly below the TIR lens portion 15B to immediately below the transmitting portion 15D. The reflective surface 13G is formed so as to include at least part of the first reflective surface 13G1 formed so as to include at least a part directly below the TIR lens part 15B and the part directly below the second lens part 15C, respectively. The second reflecting surface 13G2 is described in detail later.

  The operation of the first reflecting surface 13G1 and the second lens portion 15C will be supplemented with reference to FIG. The light emitted from the light emitting element 12 is reflected obliquely upward by the first reflecting surface 13G1. This is to prevent the reflected light from the first reflecting surface 13G1 from entering the TIR lens portion 15B immediately above the first reflecting surface 13G1. The light reflected obliquely upward by the first reflecting surface 13G1 is refracted and collected by the second lens portion 15C (A3 in FIG. 2C).

  As described above, the reflection member 13 reflects light incident on the inner side of the lowermost position of the second lens portion 15C (the uppermost position of the fourth side surface 15B4 of the TIR lens portion 15B) obliquely upward, thereby reflecting the reflection member. Since the second lens portion 15C condenses the light reflected by the light 13, the optical member 14 causes the light incident on the reflective member 13 to enter the TIR lens portion 15B directly below the lowermost position of the second lens portion 15C. Since the light can be output with almost no contact, the light collecting property of the light emitted from the light emitting element 12 can be improved. In addition, since the reflecting member 13 can be inserted into the inside, the area of the substrate 11 can be reduced.

  Subsequently, the operation of the second reflecting surface 13G2 and the transmitting portion 15D will be supplemented with reference to FIG. The light emitted from the light emitting element 12 is reflected in the vertical direction by the second reflecting surface 13G2. Then, the reflected light reflected in the vertical direction by the second reflecting surface 13G2 passes through the transmitting portion 15D as it is (A4 in FIG. 2C). By the transmission part 15D, the optical member 14 can output the light reflected by the reflection member 13 as it is.

  If the optical member 14 is configured to have the transmissive portion 15D, it is not necessary to match the uppermost end position of the second lens portion 15C of the optical member 14 with the uppermost end position of the inner side surface of the reflecting member 13. The required work accuracy is relaxed. Further, by combining with the second reflecting surface 13G2, the light collecting property can be maintained. However, if the uppermost end position of the second lens portion 15C coincides with the uppermost end position of the inner side surface of the reflecting member 13 with a predetermined working accuracy, the optical member 14 does not need to be provided with the transmission portion 15D. Light reflected by only the first reflecting surface 13G1 can be collected and output.

  Next, the reflecting member 13 will be described in more detail with reference to FIG. FIG. 3 is a cross-sectional view of the reflecting member 13. Referring to FIG. 3, the reflection surface 13G has the first reflection surface 13G1 and the second reflection surface 13G2 as described above. Thus, the reflecting member 13 having two reflecting surfaces can correspond to the optical member 14 having the transmitting portion 15D.

The cross section of the first reflecting surface 13G1 is a parabola B _{x ′} centered on the straight line X ′ with the center of the light emitting element 12 as a focal point and the vertical straight line X inclined outward by an angle θ. Also, the cross section of the second reflecting surface 13G2 is the center of the light emitting element 12 and the focal point, a parabola B _x to axis straight line X in the vertical direction.

  When the light emitted from the light emitting element 12 is reflected by the first reflecting surface 13G1, the light travels in parallel to the straight line X ′, that is, in the direction inclined at an angle θ with respect to the vertical direction, and the second of the optical member 14. The light enters the lens unit 15C. The optical member 14 can output light parallel to the vertical direction by collecting the light incident by the second lens portion 15C at an angle θ inward.

  When the light emitted from the light emitting element 12 is reflected by the second reflecting surface 13G2, the light travels in parallel to the straight line X, that is, in the vertical direction, and enters the transmitting portion 15D of the optical member 14. The optical member can output the light parallel to the vertical direction by transmitting the light incident by the transmitting portion 15D as it is.

  As described above, the optical member 14 can improve the light condensing property of the light emitted from the light emitting element 12 while suppressing an increase in the device size of the light emitting device 10.

  4A is a perspective view of the reflecting member 13 with the optical member 14 removed, as viewed obliquely from above, and FIG. 4B shows another example of the reflecting member 13 with the optical member 14 removed. It is the perspective view seen from the direction. In FIG. 4B, the prism portion 14C is shown in order to represent the relationship between the reflecting member 13 and the prism portion 14C.

  As shown in FIGS. 4A and 4B, the reflecting member 13 has a mortar-shaped first opening 13A, and a light emitting element is formed on the bottom surface of the first opening 13A (the center of the reflecting member 13). 12 has a second opening 13B for allowing the light emitted from 12 to pass therethrough. The second opening 13 </ b> B is provided with a notch 13 </ b> C for arranging a wire 11 </ b> C that connects the light emitting element 12 and the cathode electrode 11 </ b> B arranged on the substrate 11. Further, a frame member 13D, a convex portion 13E, and a concave portion 13F are provided on the upper portion of the reflecting member 13. Details of the frame member 13D, the convex portion 13E, and the concave portion 13F will be described later.

  FIG. 5A is a plan view of the light emitting element 12 taken out from the light emitting device 10 as viewed from above, and FIG. 5B shows the light emitting element 12 taken out from the light emitting device 10 from the lateral direction. FIG.

  As shown in FIGS. 5A and 5B, an electrode pad 12B and a plurality of first wiring electrodes are formed on the upper surface of the light emitting element 12, that is, the surface facing the optical member 14 in FIG. 12C to G and the second wiring electrode 12H are provided.

  The electrode pad 12B is connected to the wire 11C, and connects the cathode electrode 11B disposed on the substrate 11 and the light emitting element 12 via the wire 11C. The electrode pad 12B is provided at the end of the light emitting element 12 so that light emitted from the center of the light emitting element 12 is not blocked by the electrode pad 12B.

  The first wiring electrodes 12 </ b> C to 12 </ b> G and the second wiring electrode 12 </ b> H are connected to the electrode pad 12 </ b> B and flow the current flowing from the substrate 11 through the wire 11 </ b> C to the light emitting element 12. The plurality of first wiring electrodes 12C to 12G are arranged at substantially equal intervals in the vertical direction A6 so as to extend in the horizontal direction A5 in FIG. The second wiring electrode 12H extends from the electrode pad 12B in the vertical direction A6 along the end of the light emitting element 12, and is connected to the respective ends of the first wiring electrodes 12C to 12E.

  The current flowing from the substrate 11 flows to the light emitting element 12 through the second wiring electrode 12H and the first wiring electrodes 12C to 12G. By passing the current from the substrate 11 to the light emitting element 12 through the plurality of wiring electrodes, the current can be efficiently dispersed throughout the light emitting element 12. The second wiring electrode 12H is at least partially wider than the first wiring electrodes 12C to G, and the width of the second wiring electrode 12H becomes wider as it is closer to the electrode pad 12B. It gets thinner as you leave. As a result, the current from the substrate 11 flows to the first wiring electrodes 12 </ b> C to 12 </ b> E in a well-balanced manner, and the current can be efficiently distributed throughout the light emitting element 12.

  4B, the direction A6 in which the second wiring electrode 12H extends is the direction in which the prism portion 14C refracts the light emitted from the light emitting element 12 with respect to the vertical direction of the optical member 14. The optical member 14 is arranged with respect to the light emitting element 12 so as to be in substantially the same direction (a direction orthogonal to the direction A5 in which the prism groove extends).

  In general, the lens has a circular shape, and when the shape of the light emitting element 12 is square, it is easier to perform optical design than when the shape is rectangular, so the lens can efficiently collect light from the light emitting element 12. . Therefore, the shape of the light emitting element 12 is preferably square. However, when the shape of the light emitting element 12 is square, a part of the light from the light emitting element 12 is blocked by the second wiring electrode 12H, and the light emitted from the light emitting device 10 becomes rectangular.

  As a result of measuring the orientation half-value angle of the light emitting element 12 (angle range in which the light intensity is 1/2 or more of the peak intensity), the orientation half-value angle in the direction in which the second wiring electrode 12H extends is orthogonal to the direction. It was larger by 0.1 [deg] than the orientation half-value angle in the direction. That is, the emitted light spreads more in the direction A6 in which the second wiring electrode 12H extends than in the direction A5 orthogonal to that direction.

  For example, when an imaging device of a mobile terminal in which the light emitting device 10 is used is used for iris authentication, the user carries the mobile phone so that his / her eyes are positioned in front of the imaging device in order to cause the imaging device to capture his / her eyes. Place the terminal. When the light emitting device 10 is disposed beside the imaging device, the amount of the light emitting device 10 and the user's eyes shifted in the horizontal direction is the distance between the light emitting device 10 and the imaging device and between the light emitting device 10 and the user's eyes. It depends on the distance. Therefore, in order to increase the possibility of appropriately irradiating the user's eyes, it is desirable that the light emitting device 10 emits light so as to spread in the horizontal direction from the vertical direction with respect to the user's eyes.

  Therefore, the optical member with respect to the light emitting element 12 is set such that the direction A6 in which the second wiring electrode 12H extends is lateral to the user's eyes, that is, substantially the same direction as the direction in which the prism portion 14C refracts light. By arrange | positioning 14, the possibility of irradiating a user's eyes appropriately can be improved.

  4B, the second opening 13B of the reflecting member 13 is provided with a notch 13C. Therefore, the amount of light emitted from the light emitting element 12 and reflected by the reflecting member 13 is reduced in the direction A6 in which the cutout portion 13C is provided, compared to the direction A5 in which the cutout portion 13C is not provided. Therefore, it is more preferable that the notch 13C is provided on a direction A5 orthogonal to the direction A6 in which the second wiring electrode 12H extends in the radial direction of the second opening 13B. Thereby, the light emitting device 10 can emit light so that the light in the direction A6 in which the second wiring electrode 12H extends is further spread.

  Hereinafter, the manufacturing process of the light-emitting device 10 will be described with reference to FIGS.

  6A to 6C are views for explaining the component assembly 114 of the optical member 14. 6A is a perspective view of the component assembly 114, FIG. 6B is a plan view of the component assembly 114 viewed from above, and FIG. 6C is a diagram of the component assembly 114 viewed from below. FIG.

  First, the component assembly 114 of the optical member 14 is formed. Each component 114A (optical member) is a rectangular object. The number of components 114A in the component assembly 114 is not limited to the illustrated number, and may be larger or smaller than the illustrated number.

  FIGS. 7A to 7C are diagrams for explaining the component assembly 113 of the reflecting member 13. 7A is a perspective view of the component assembly 113, FIG. 7B is a plan view of the component assembly 113 as viewed from above, and FIG. 7C is a diagram of the component assembly 113 from below. FIG.

  Next, a component assembly 113 of the reflecting member 13 is formed. Each component 113A (reflecting member) is a rectangular object. The same number of components 113A as the components 114A of the component assembly 114 of the optical member 14 are integrally arranged vertically and horizontally.

  FIG. 8A is an enlarged view of the component assembly 113 in which the region R1 in FIG. 7B is enlarged.

  As shown in FIG. 8A, a convex frame member 113D is provided at the end of each component 113A above the component assembly 113, that is, above the reflecting member 13. Further, there are two parts 113A that are adjacent to each other in the horizontal direction and two parts 113A that are adjacent to each other in the vertical direction. , A convex portion 113E is provided. A recess 113F is formed between the frame member 113D and the projection 113E by the frame member 113D and the projection 113E. When the component assembly 113 is cut (diced) by processing to be described later, the frame member 113D, the convex portion 113E, and the concave portion 113F become the frame member 13D and the convex portion 13E shown in FIGS. 4A and 4B, respectively. And the recess 13F.

  FIG. 8B is a schematic diagram showing a state in which an adhesive is applied to the component assembly 113 in FIG.

  As shown in FIG. 8B, the optical member 14 is bonded while moving the dispenser (not shown) in the direction of the arrow A7 along the gap extending between the parts 113A in the horizontal direction. The adhesive is applied to the component assembly 113. The gap includes a convex portion 113E and a concave portion 113F. When the adhesive is applied to the convex portion 113E, the applied adhesive flows from the convex portion 113E toward the concave portion 113F. As a result, the adhesive flows and spreads vigorously in the recess 113F, and unevenness is reduced. On the other hand, the applied adhesive is blocked by a frame member 113D disposed around the recess 113F, and the adhesive is prevented from flowing into each component 113A.

  FIG. 9 is a schematic diagram showing a component assembly 113 ′ that is a modification of the component assembly 113.

  In the component assembly 113 'of the reflecting member 13 shown in FIG. 9, a convex portion 113E' is provided instead of the convex portion 113E. A groove 113G 'is formed in the convex portion 113E' along a gap extending between the parts 113A in the horizontal and vertical directions. Due to the groove 113G 'formed in the convex portion 113E', the adhesive applied to the convex portion 113E 'flows into the concave portion 113F in a shorter time. Further, the groove 113G ′ formed in the convex portion 113E ′ functions as a guide in the direction in which the adhesive flows, and the adhesive applied to the convex portion 113E ′ passes through the frame member 113D and flows into each component 113A. It is prevented.

  10A is a perspective view showing a state in which the component assembly 114 of the optical member 14 is bonded to the component assembly 113 of the reflecting member 13, and FIG. 10B is a region in FIG. 10A. It is the enlarged view to which R2 was expanded.

  As shown in FIGS. 10A and 10B, after the adhesive is applied to the component assembly 113, the component assembly 114 is bonded, and the component assembly 113 and the component assembly 114 are bonded.

  When the individual reflecting members 13 and the optical members 14 are bonded together, there is a possibility that the adhesive protrudes outside the reflecting members 13 and the optical members 14. In addition, the adhesive does not reach the outer peripheral portions of the reflecting member 13 and the optical member 14 sufficiently, so that the adhesive force is reduced, or a gap is generated between the reflecting member 13 and the optical member 14, and foreign matter can enter from there. There is also sex. By using the component assembly 113 and the component assembly 114 to bond the reflecting member 13 and the optical member 14, the above-described possibility can be reduced.

  FIG. 11A is a schematic diagram illustrating a state in which the component assembly 113 to which the component assembly 114 is bonded is cut, and FIG. 11B is a diagram from the component assembly 113 to which the component assembly 114 is bonded. It is a schematic diagram which shows the reflective member 13 and the optical member 14 which were cut out.

  As shown in FIGS. 11 (A) and 11 (B), individual parts (optical members 14) are obtained by cutting (dicing) the part assembly 113 to which the part assembly 114 is bonded on the vertical and horizontal cutting lines L. Is obtained.

  FIG. 12A is a schematic diagram for explaining the component assembly 111 of the substrate 11 and the reflection member 13 to which the optical member 14 is bonded.

  As shown in FIG. 12A, a reflective member 13 having an optical member 14 bonded thereto is bonded to an assembly 111 having a light emitting element (not shown) mounted on a substrate 11 with an adhesive or the like. The individual parts of the substrate 11 and the light emitting element 12 are rectangular objects. Note that the number of components in the component assemblies 111 and 112 is not limited to the illustrated number, and may be larger or smaller than the illustrated number.

  Next, the individual light emitting devices 10 are obtained by cutting (dicing) the component assembly 111 to which the optical member 14 and the reflecting member 13 are bonded.

  FIG. 12B is a schematic diagram showing the light emitting device 10 cut out from the component assembly 111 to which the optical member 14 and the reflecting member 13 are bonded.

  As shown in FIG. 12B, a vent hole 11D is provided on the side surface of the substrate 11. The vent hole 11D is provided by providing a step in the component assembly 111 of the substrate 11. By providing the air holes 11D in the substrate 11, air or moisture expands when the optical member 14 and the reflecting member 13 are bonded to the component assembly 111 or when the components are solder-mounted. It becomes possible to prevent the peeling easily.

  As described above, since a plurality of light emitting devices 10 can be manufactured from each of the component assemblies 111, 113, and 114, the production efficiency of the light emitting device 10 can be improved and the manufacturing cost of the light emitting device 10 can be improved. Can be reduced.

  FIGS. 13A to 13C are diagrams for explaining a light emitting device 20 according to another embodiment. FIG. 13A is a schematic perspective view of the light emitting device 20. FIG. 13B is a cross-sectional view taken along the line A-A ′ of FIG. FIG. 13C is a plan view of the light emitting device 20 as viewed from above.

  As illustrated in FIGS. 13A to 13C, the light emitting device 20 includes an optical member 24 instead of the optical member 14 included in the light emitting device 10. The optical member 24 is different from the optical member 14 in that the prism portion is not formed.

  As described above, in the light emitting devices 10 and 20, the optical members 14 and 24 are provided with the first lens unit 15A, the TIR lens unit 15B, the second lens unit 15C, the transmission unit 15D, and the like, so that It is possible to improve the condensing property of the light emitted from the light emitting element while suppressing an increase in the device size.

  The light emitting devices 10 and 20 can be used as a flash device of a camera in a portable terminal, for example. The light emitting devices 10 and 20 are various light sources such as a light source such as a backlight in a large area liquid crystal display, a light guide plate illumination in a small area liquid crystal display such as a mobile phone, and a backlight unit for meters or indicators. It can be used.

DESCRIPTION OF SYMBOLS 10, 20 Light-emitting device 11 Board | substrate 12 Light-emitting element 12B Electrode pad 12C-12G 1st wiring electrode 12H 2nd wiring electrode 13 Reflective member 13B 2nd opening part 13C Notch part 13D Frame member 13E Convex part 14, 24 Optical member 14C Prism unit 15A First lens unit 15B TIR lens unit 15C Second lens unit 15D Transmission unit

Claims (8)

From the center side,
A first lens unit for condensing light emitted from the light emitting element;
A TIR lens unit for condensing light emitted from the light emitting element using internal reflection;
A second lens portion for condensing the light emitted from the light emitting element and reflected by the reflecting member;
An optical member comprising:   2. The optical member according to claim 1, further comprising a transmissive portion that passes the light emitted from the light emitting element and reflected by the reflecting member as it is, outside the second lens portion. A light-emitting device comprising the optical member according to claim 1,
A substrate,
The light emitting element mounted on the substrate;
The reflective member disposed on the substrate so as to cover the periphery of the light emitting element,
The optical member is disposed above the light emitting element,
The optical element includes the first lens unit, the TIR lens unit, and the second lens unit on a surface facing the light emitting element. A light emitting device comprising the optical member according to claim 2,
A substrate,
The light emitting element mounted on the substrate;
The reflective member disposed on the substrate so as to cover the periphery of the light emitting element,
The optical member is disposed above the light emitting element,
The optical element has the first lens part, the TIR lens part, the second lens part, and a transmission part on a surface facing the light emitting element,
The reflection member includes a first reflection surface that reflects light incident from the light emitting element toward the second lens portion, and a second reflection surface that reflects light incident from the light emitting element toward the transmission portion in a vertical direction. A light emitting device having a reflective surface.   The optical member emits light emitted from the first lens unit, the TIR lens unit, and the second lens unit on a back surface of a surface on which light is incident from the light emitting element with respect to a vertical direction of the optical member. The light emitting device according to claim 3, further comprising a prism portion for refracting in a predetermined direction. On the surface of the light emitting element facing the optical member, an electrode pad for connecting to a wire, a first wiring electrode connected to the electrode pad, and at least partially wider than the first wiring electrode A second wiring electrode is provided,
The light emitting device according to claim 5, wherein the optical member is arranged with respect to the light emitting element such that a direction in which the second wiring electrode extends is substantially the same as the predetermined direction.   The light-emitting device according to claim 6, wherein the reflection member has an opening provided with a notch for arranging a wire connecting the light-emitting element and an electrode arranged on the substrate.   A convex part for applying an adhesive for adhering the optical member to the upper part of the reflecting member, and a frame member arranged around the convex part and for damming the applied adhesive The light emitting device according to claim 3, wherein the light emitting device is provided.

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