JP2007266445A - Light emitting device and lighting device using same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve optical characteristics of a light emitting device by improving position accuracy of an optical member. <P>SOLUTION: The light emitting device has a base 1, a light emitting element 2 mounted on the base 1, an optical member 3 which is arranged above the light emitting element 2 and has a projection 3a in contact with the base 1 and a translucent member 4 which is provided between the base 1 and the optical member 3 and covers the light emitting element 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light emitting device in which a light emitting element is housed and a lighting device using the same, and more particularly to a light emitting device excellent in luminous efficiency and light distribution characteristics and a lighting device using the same.

  As a conventional light emitting device, a base, a light emitting element flip-chip mounted on the base via a conductive member, an optical member disposed on the light emitting element, a light emitting element provided between the light emitting element and the optical member, There is a thing provided with the translucent member which covers.

  The translucent member is a resin having translucency such as a silicone resin, and the light emitting element 12 is sealed by the translucent member and the optical member is fixed.

In recent years, such light emitting devices have begun to be used as display light sources, illumination light sources, or ultraviolet light sources, and in particular, there has been an increasing demand for light emission efficiency and stability of light distribution.
JP 2005-158949 A

  However, in the conventional light emitting device, there is a possibility that the optical member settles or tilts before the translucent member is cured. In addition, the optical member may move from a desired position from the translucent member before the translucent member is cured. As described above, in the conventional light emitting device, the height accuracy of the optical member relative to the base or the positional accuracy of the optical member relative to the light emitting device cannot be improved. As a result, there is a problem that a deviation occurs between the optical axis of the light emitting element and the optical axis of the optical member, and the light distribution of the light emitting device is not stable.

  The present invention has been made in view of the above problems of the conventional light emitting device, and an object of the present invention is to improve the positional accuracy of the optical member and improve the optical characteristics of the light emitting device.

  The light emitting device of the present invention includes a base, a light emitting element mounted on the base, an optical member disposed above the light emitting element and having a protrusion in contact with the base, the base and the optical member, And a translucent member that covers the light emitting element.

  In the light emitting device of the present invention, the optical member has a plurality of the protrusions.

  In the light-emitting device of the present invention, an angle formed between a side surface of the protrusion and a surface of the optical member facing the light-emitting element is an obtuse angle.

  Further, the light emitting device of the present invention is characterized in that a recess is formed in the mounting surface of the light emitting element of the base, and the tip of the projection of the optical member is located on the bottom surface of the recess. It is.

  The lighting device of the present invention includes a light emitting device of the present invention, a drive unit on which the light emitting device is mounted, and an electric wiring that drives the light emitting device, and a light reflection that reflects light emitted from the light emitting device. Means.

  The light emitting device of the present invention can improve the height accuracy of the optical member relative to the base or the positional accuracy of the optical member relative to the light emitting device because the optical member has a protrusion in contact with the base. It is possible to stabilize the light distribution of the apparatus.

  In the light emitting device of the present invention, since the optical member has a plurality of protrusions, the height accuracy of the optical member with respect to the base or the positional accuracy of the optical member with respect to the light emitting device can be further improved.

  In the light emitting device of the present invention, when the angle formed between the side surface of the protrusion and the surface of the optical member facing the light emitting element is an obtuse angle, the translucent member is filled between the base and the optical member. In addition, it is possible to reduce the possibility of bubbles being accumulated, and to stabilize the light emission efficiency and the light distribution.

  In the light emitting device of the present invention, the concave portion is formed on the mounting surface of the light emitting element of the base, and the tip of the projection of the optical member is located on the bottom surface of the concave portion, thereby improving the alignment accuracy of the optical member. Can be improved.

  The light emitting device of the present invention will be described in detail below.

  1 to 7 are a cross-sectional view and a top plan view showing an example of an embodiment of a light-emitting device of the present invention. In these drawings, 1 is a base on which the light emitting element 2 is mounted on the upper surface, 3 is an optical member disposed above the light emitting element 2, and 4 is an optical member 3 that covers the light emitting element 2 and faces the light emitting element 2. The light-emitting member of the present invention in which the light-emitting element 2 is mounted is mainly composed of a translucent member disposed between the surface 3b and the substrate 1.

  The substrate 1 is made of a ceramic such as an aluminum oxide sintered body (alumina ceramic), an aluminum nitride sintered body, a mullite sintered body, a glass ceramic, or a resin such as an epoxy resin, and the light emitting element 2 is mounted thereon. A mounting portion 1 a is formed on the upper surface of the base 1. When the substrate 1 is made of ceramics, the wiring conductor 1b is formed on the upper surface thereof by firing a metal paste made of tungsten (W), molybdenum (Mo) -manganese (Mn), or the like at a high temperature.

  When the substrate 1 is made of ceramics, an input / output terminal made of metal on which the wiring conductor 1b is formed may be provided by being fitted and joined to a through hole provided in the substrate 1.

  Further, when the substrate 1 is made of resin, lead terminals made of copper (Cu), iron (Fe) -nickel (Ni) alloy, or the like are integrally molded and fixed inside the substrate 1.

  The base 1 includes a conductive member 5 made of solder such as lead (Pb) -tin (Sn) or gold (Au) -Sn at one end of the wiring conductor 1b from which the light emitting element 2 is led out to the mounting portion 1a. It is electrically connected and fixed via the electrode part of the light emitting element 2. Furthermore, the other end of the wiring conductor 1b led out to the outer surface of the light emitting device via the wiring layer formed inside the base body 1 and the light emitting device driving circuit board are electrically connected, whereby the light emitting element 2 And the light emitting device drive circuit board are electrically connected.

  The wiring conductor 1b is preferably coated with a metal having excellent corrosion resistance, such as Ni or Au, with a thickness of about 1 to 20 μm on the exposed surface, effectively preventing oxidative corrosion of the wiring conductor 1b. In addition, the electrical connection between the light emitting element 2 and the wiring conductor 1b can be strengthened. Therefore, for example, a Ni plating layer having a thickness of about 1 to 10 μm and an Au plating layer having a thickness of about 0.1 to 3 μm are sequentially deposited on the exposed surface of the wiring conductor 1b by an electrolytic plating method or an electroless plating method. More preferably.

  The light emitting element 2 may be electrically connected to one end of the wiring conductor 1b led out to the mounting portion 1a using a wire bonding method. The light emitting element 2 is preferably electrically connected by a flip chip bonding method through a conductive member 5 such as solder or metal bump with the electrode of the light emitting element 2 facing down. Thereby, since the wiring conductor 1b can be provided immediately under the light emitting element 2, it is not necessary to provide a space for providing the wiring conductor 1b on the upper surface of the base 1 around the light emitting element 2. Therefore, it is possible to effectively suppress the light emitted from the light emitting element 2 from being absorbed in the space of the wiring conductor 1b of the substrate 1 and the light emission intensity from being lowered.

  The light emitting element 2 is formed on a single crystal substrate such as sapphire by liquid phase growth method, MOCVD method, or the like, for example, gallium (Ga) -Al-nitrogen (N), zinc (Zn) -sulfur (S), Zn -Selenium (Se), Silicon (Si) -Carbon (C), Ga-Phosphorus (P), Ga-Aluminum (Al) -Arsenic (As), Al-Indium (In) -Ga-P, In-Ga- A light emitting layer of N, Ga—N, Al—In—Ga—N, or the like is formed. Examples of the structure of the light emitting element 2 include a homo structure having a MIS junction and a PN junction, a hetero structure, and a double hetero structure. The emission wavelength of the light emitting element 2 is variously selected from ultraviolet light to infrared light depending on the material of the light emitting layer and the degree of mixed crystal thereof.

  The light emitting element 2 is electrically connected and fixed to the wiring conductor 1b led out to the mounting portion 1a via the conductive member 5, and then uncured silicone resin, epoxy resin, fluorine resin, acrylic resin, etc. The translucent member 4 made of translucent glass material such as sol-gel glass, water glass, low melting point glass or the like.

  Furthermore, a transparent resin material such as a silicone resin, an epoxy resin, a fluorine resin, an acrylic resin, or a transparent material such as sol-gel glass, water glass, low-melting glass, sapphire, quartz glass, borosilicate glass, or the like. The optical member 3 made of a light inorganic material and cured and molded into a predetermined shape is disposed above the light emitting element 2 via the uncured light transmissive member 4 and then the light transmissive member 4. Is fixed by curing. Alternatively, the optical member 3 is disposed above the light emitting element 2, and the uncured translucent member 4 is injected into the gap between the light emitting element 2 and the optical member 3 using a dispenser or the like and heated. The optical member 3 is attached and fixed above the light emitting element 2 through the translucent member 4 by being cured by hydrolysis, natural standing, or light irradiation.

  As shown in the cross-sectional view of FIG. 1A and the top plan view of FIG. 1B, the optical member 3 has projections 3a formed around the light emitting element 2 on the surface 3b facing the light emitting element 2. Therefore, it becomes easy to stabilize the light output and light distribution of the light emitting device. That is, since the protrusion 3a is formed around the light emitting element 2 on the surface of the optical member 3 facing the light emitting element 2, the distance and inclination between the base 1 and the surface 3b of the optical member 3 facing the light emitting element 2 are inclined. Is retained. Therefore, by suppressing the positional deviation and inclination of the optical member 3, the light from the light emitting element 3 via the translucent member 4 is prevented from entering the optical member 3 at an angle different from a desired angle. As a result, it is possible to suppress the occurrence of bias in the angle and intensity of the light emitted from the optical member 3, so that the light distribution of the light emitting device can be stabilized.

Furthermore, since the base body 1 and the optical member 3 can be held by the protrusions 3a, the distance between the base body 1 and the surface of the optical member 3 facing the light emitting element 2 can be stably arranged at a desired distance. The elastic member 4 can be held in the gap between the base 1 and the optical member 3 with a constant thickness. As a result, a certain amount of the translucent member 4 is injected into the space between the base 1 and the surface 3b of the optical member 3 facing the light emitting element 2, whereby the surface tension of the translucent member 4 is increased. Since it acts stably in the space | interval with the surface 3b which opposes the light emitting element 3, the flow of the translucent member 4 can be controlled to some extent. As a result, it is possible to suppress the translucent member 4 from spreading (exuding) into the base 1 and the optical member 3.

  Further, since the translucent member 4 tends to shrink when it is cured, the translucent member 4 can be attached so that the tip of the protrusion 3 a of the optical member 3 is in close contact with the base 1. Therefore, by adjusting the height (projection amount) of the protrusion 3a to be accurate, the distance between the base 1 and the optical member 3 can be accurately maintained, and the optical member 3 can exhibit desired optical characteristics. Can do. For example, it becomes easy to arrange the light emitting element 2 at the focal position of the optical member 3.

  The protrusion 3a may be formed in a circular shape or a polygonal shape on the entire circumference of the light emitting element 2 so as to surround the light emitting element 2, as shown in a plan view in FIG. 1B. As shown in FIG. 4, it may be a columnar shape provided at an appropriate position around the light emitting element 2, for example, at the apex position of an equilateral triangle in plan view.

  By providing the protrusions 3a in a columnar shape in this way, when filling the translucent member 4 between the base 1 and the optical member 2, air can easily escape from between the columnar protrusions 3a, and the inner side of the protrusions 3a. Air bubbles hardly remain in the translucent member 4. And the light scattered by the air bubbles mixed in the translucent member 4 is reduced, the light distribution of the light emitting device is stabilized, and the light from the light emitting element 3 traveling to the substrate 1 is reduced by being scattered. . As a result, the light absorbed by the substrate 1 is reduced, so that the light emission efficiency of the light emitting device can be stabilized.

  The protrusion 3a may be a protrusion 3a that protrudes linearly on both sides of the light emitting element 2 and extends. However, if the protrusions 3a are arranged closely to each other, it is difficult for bubbles to escape between the protrusions 3a. Therefore, as shown in FIG. 3, it is preferable to arrange the protrusion 3a at the apex position of an equilateral triangle that is stably supported by the minimum protrusion 3a.

  Further, the projection 3a preferably has an obtuse angle 3c formed between the side surface of the projection 3a and the surface of the optical member 3 facing the light emitting element 2 as shown in the sectional view of FIG. When the translucent member 4 is disposed between the element 2 and the optical member 3, it is possible to prevent bubbles from remaining in the translucent member 4. That is, when the translucent member 4 is filled between the base 1 and the optical member 3, if there is a corner portion having a right angle or an acute angle, bubbles easily accumulate in that portion and are difficult to move. Therefore, it is possible to suppress the bubbles from remaining inside the translucent member 4 by making the angle of the corner portion between the surface of the optical member 3 facing the light emitting element 2 and the protrusion 3 a an obtuse angle. As a result, it is possible to suppress light from the light emitting element 2 from being scattered by the bubbles mixed in the translucent member 4. Therefore, the light absorbed by the substrate 1 is suppressed, so that the light emission efficiency and light distribution of the light emitting device can be stabilized.

  Further, as shown in the cross-sectional view of FIG. 5 or FIG. 6, the substrate 1 is preferably formed with a recess 1c on the upper surface of the substrate 1, and the tip of the protrusion 3a is disposed on the bottom surface of the recess 1c. By being installed and fixed in the concave portion 1c via the protrusion 3a, it is possible to prevent the position of the optical member 3 from changing when the optical member 3 is mounted on the upper surface of the base 1 via the translucent member 4. . As a result, the light emission efficiency and light distribution of the light emitting device can be stabilized.

  Furthermore, since the recess 1c serves as a mark when the optical member 3 is disposed on the upper surface of the base body 1 through the protrusion 3a, the installation of the optical member 3 on the base body 1 can be automated and the manufacturing cost of the light emitting device can be reduced. be able to.

  Furthermore, the recess 1c may be formed so that only the protrusion 3a is inserted and fixed around the mounting portion 1a on the upper surface of the base 1 as shown in the cross-sectional view of FIG. It is uniquely positioned and fixed on the upper surface of one. As a result, an axial shift between the central axis of the mounting portion 1a and the optical axis of the optical member 3 that occurs when the optical member 3 is mounted on the upper surface of the substrate 1 can be effectively suppressed.

  The optical member 3 is made of translucent resin material such as epoxy resin, silicone resin, acrylic resin, fluorine resin, sol-gel glass, water glass, low melting point glass, sapphire, quartz glass, borosilicate glass, etc. The light-transmitting inorganic material is formed into a desired shape by molding such as cutting, polishing, mold processing, transfer molding, injection molding, or the like.

The translucent member 4 is preferably arranged on the inner side of the outer periphery of the optical member 3, and the light absorption loss on the upper surface of the substrate 1 is suppressed. That is, as the translucent member 4 spreads outside the optical member 3, the angle of the side surface of the translucent member 4 with respect to the upper surface of the base 1 becomes a gently inclined surface. Therefore, since the interface between the air and the translucent member becomes a steep slope with respect to the side surface of the light emitting element, the light emitted toward the side surface of the light emitting element is incident at an obtuse angle with respect to the interface between the air and the translucent member. Therefore, it becomes difficult for light to be emitted from the translucent member to the air. As a result, the light is easily confined to the translucent member 4, and the light intensity is weakened by the light absorption loss on the upper surface of the substrate 1 in contact with the translucent member 4. Therefore, since the translucent member 4 is disposed inside the optical member 3, the angle of the side surface of the translucent member 4 with respect to the upper surface of the substrate 1 can be maintained on a steep slope. Light becomes difficult to be confined in the translucent member 4, and light absorption loss due to the upper surface of the substrate 1 is effectively suppressed. As a result, since the light from the light emitting element 2 is efficiently emitted outside the light emitting device, the ratio of the amount of light (light flux) extracted outside the light emitting device to the input power to the light emitting element 2 (light emission efficiency) Will improve.

  As a method for preventing the translucent member 4 from coming out from the inside of the optical member 3, the surface tension of the translucent member 4 is used to make the translucent member 4 in the gap between the light emitting element 2 and the optical member 3. A method of filling an appropriate amount (the specific amount depends on the size of the optical member and the height of the foot), and a method of making the outer periphery of the optical member 3 less likely to spread by increasing the viscosity of the translucent member 4 ( There is a method to make it difficult to sag.

  Further, the translucent member 4 is more preferably a concave curved surface with the side surface of the translucent member 4 facing inward as shown in the cross-sectional view of FIG. The light is reflected by the measurement surface of the concave translucent member 4, enters the optical member 3, and is emitted upward from the optical member 3. As a result, the radiant flux or light flux of light emitted upward from the light emitting element 2 is increased, and the light emission efficiency, luminance, and luminous intensity of the light emitting device are improved.

The translucent member 4 is made of transparent resin such as epoxy resin or silicone resin, or translucent glass. A light emitting device in which the optical member 3 is disposed so that the protrusion 3a is on the upper side, the concave portion formed by the protrusion 3a is filled with the above-described uncured translucent member 4, and is electrically connected and fixed to the mounting portion 1a. The base 1 is mounted on the protrusion 3a so that the light emitting element 2 is immersed in the uncured translucent member 4, and then further injected from the side surface of the optical member 3 using a dispenser or the like. Thereby, the translucent member 4 can be arrange | positioned. The uncured translucent member 4 is cured by heating, hydrolysis, natural standing, and light irradiation, whereby the optical member 3 is attached and fixed to the upper surface of the substrate 1 via the translucent member 4. As shown in the cross-sectional view of FIG. 7, the reflecting member 6 is preferably disposed and attached to the outer peripheral portion of the upper surface of the base 1 so as to surround the light emitting element 2. Thereby, the light emitted from the light emitting element 2 and the optical member 3 to the side is reflected by the inner peripheral surface 6a of the reflecting member 6, and can be condensed and emitted to the outside of the light emitting device. Luminous intensity and illuminance of the irradiated surface are improved. For this purpose, the inner peripheral surface 6a is preferably an inclined surface that expands outward as it goes upward.

  Further, the reflecting member 6 has a function of protecting the light emitting element 2, the optical member 3, and the translucent member 4 from physical impact on the light emitting device. Thereby, the failure of the light emitting device due to the breakage or destruction of the light emitting element 2, the optical member 3, or the translucent member 4 is prevented.

  The reflecting member 6 is formed by cutting or molding a metal having a high reflectance such as Al, Ag, Au, Pt, Ti, Cr, Cu, and Rh. Or it forms from insulators, such as ceramics and resin. The reflecting member 6 is fixedly attached to the outer peripheral portion of the upper surface of the base 1 by a soldering material such as solder or Ag brazing, or a resin adhesive such as epoxy resin or acrylic resin so as to surround the mounting portion 1a.

  When the reflecting member 6 is made of a ceramic or resin having a low light reflectance, a metal having a high reflectance such as Al, Ag, Au, Pt, Ti, Cr, Cu, Rh is plated or evaporated on the inner peripheral surface 6a. For example, it may be formed into a film shape. Further, when the inner peripheral surface 6a is made of a metal that is easily discolored by oxidation, such as Ag or Cu, the surface has transparency such as silicone resin, epoxy resin, acrylic resin, sol-gel glass, water glass, etc. The member is preferably covered with a thickness of about 0.1 to 1 mm. Thereby, the corrosion resistance of the inner peripheral surface 6a is improved and the deterioration of the reflectance is suppressed. The surface accuracy of the inner peripheral surface 6a is controlled by a conventionally known electrolytic polishing process, chemical polishing process or cutting polishing process. Alternatively, the surface accuracy may be controlled by transfer processing using the surface accuracy of the mold.

  Moreover, the reflection member 6 may form the inner peripheral surface 6a in a linear shape or a curved shape, and there is no problem even if the longitudinal sectional shape of the outer peripheral surface is changed to a curved shape.

  The lighting device of the present invention includes the above-described light emitting device of the present invention, a drive unit on which the light emitting device is mounted and having electric wiring for driving the light emitting device, and a light reflecting means for reflecting light emitted from the light emitting device. As a result, the brightness of the light emitting device is improved, fluctuations in the wavelength of the emitted light and the unevenness of the intensity of each light emitting device are suppressed, and the unevenness of the intensity of the lighting device of the present invention, which is collected as a lighting device, is also suppressed. As a result, the luminance becomes high.

  Further, in the illumination device of the present invention, as shown in FIGS. 8, 9, 10, and 11, one light emitting device 101 is installed in a predetermined arrangement, or a plurality of light emitting devices 101, for example, Alternatively, it may be installed so as to have a predetermined arrangement such as a lattice shape, a staggered shape, or a radial shape. Or you may install so that the circular shape which consists of the several light-emitting device 101, or the polygonal-shaped light-emitting device 101 group may form several groups concentrically, etc. may become predetermined arrangement | positioning.

  For example, as shown in the plan view of FIG. 8 and the cross-sectional view of FIG. 9, a plurality of light emitting devices 101 are arranged in a plurality of rows on a drive unit 102 having electrical wiring for driving the light emitting devices 101, In the case of a light emitting device in which light reflecting means 103 such as a reflecting plate optically designed in an arbitrary shape is installed around 101, the distance between adjacent light emitting devices 101 is not shortest, for example, arranged in a row It is preferable to adopt an arrangement in which adjacent rows of light emitting devices 101 are arranged between a plurality of light emitting devices 101, that is, a so-called staggered arrangement. That is, when the light emitting devices 101 are arranged in a grid, glare is strengthened by arranging the light emitting devices 101 in a vertical and horizontal linear grid, and such a light emitting device 101 enters human vision. Thus, discomfort is likely to occur, but the staggered shape can suppress glare and reduce discomfort to the human eye. Further, since the distance between the adjacent light emitting devices 101 is increased, thermal interference between the adjacent light emitting devices 101 is effectively suppressed, and heat accumulation in the drive unit 102 in which the light emitting devices 101 are mounted is suppressed. Then, heat is efficiently dissipated outside the light emitting device 101. As a result, it is possible to manufacture a light-emitting device with a long life with less discomfort to human eyes and stable optical characteristics over a long period of time.

  Further, the light emitting device includes a concentric arrangement of a plurality of circular or polygonal light emitting device groups 101 each made up of a plurality of light emitting devices 101 on the drive unit 102 as shown in the plan view of FIG. 10 and a cross-sectional view thereof. In the case of a group of light emitting devices, it is preferable to increase the number of light emitting devices 101 arranged in one circular or polygonal light emitting device 101 group from the center side of the light emitting device to the outer peripheral side. Thereby, it is possible to arrange more light emitting devices 101 while maintaining an appropriate interval between the light emitting devices 101, and it is possible to further improve the illuminance of the light emitting devices. Further, the density of the light emitting device 101 at the center of the light emitting device can be lowered to suppress the accumulation of heat at the center of the driving unit 102. As a result, the temperature distribution in the drive unit 102 becomes uniform, heat is efficiently transmitted to the external electric circuit board or heat sink on which the light emitting device is installed, and the temperature rise of the light emitting device 101 can be suppressed. Can operate stably over a long period of time and can produce a light-emitting device with a long lifetime.

  Examples of the lighting device using such a light emitting device include, for example, general lighting fixtures, chandelier lighting fixtures, residential lighting fixtures, office lighting fixtures, store lighting, and display lighting fixtures that are used indoors and outdoors. Street lighting fixtures, guide lights and signaling devices, stage and studio lighting fixtures, advertising lights, lighting poles, underwater lighting lights, strobe lights, spotlights, security lights embedded in power poles, emergency use Examples include lighting fixtures, flashlights, electric bulletin boards, backlights such as dimmers, automatic flashers, displays, moving image devices, ornaments, illuminated switches, optical sensors, medical lights, vehicle lights, and the like.

  It should be noted that the present invention is not limited to the above-described embodiment, and various modifications are not hindered without departing from the gist of the present invention. For example, an optical lens that radiates light from the light-emitting element 2 or the optical member 3 and collects and diffuses the light as required on the upper surface of the reflecting member 6 or a flat light-transmitting lid is bonded with solder or a resin bonding agent. Thus, a light emitting device that can extract light at a desired radiation angle may be used. Thereby, the water immersion in a light-emitting device is improved and long-term reliability and an operating life improve.

  In the above embodiment, the inner peripheral surface 6a of the reflecting member 6 has been described as an example of a circular shape in plan view. However, the present invention is not limited to a circular shape, and may be a rectangular shape or other polygonal shapes. Further, it may be an indefinite shape such as an elliptical shape or a star shape. Further, the outer peripheral shape of the reflecting member 6 and the base 1 is not limited to a circular shape, and may be other polygonal shapes, quadrangular shapes, elliptical shapes, or other indefinite shapes. Moreover, although the cross-sectional shape of the reflecting member 6 is shown as a right triangle block, it may be formed in a frustum shape with a plate material or the like, for example.

  In the description of the above embodiment, the terms “upper, lower, left and right” are merely used to describe the positional relationship in the drawings, and do not mean the positional relationship in actual use.

It is sectional drawing and a top view which show an example of embodiment of the light-emitting device of this invention. It is sectional drawing which shows the other example of embodiment of the light-emitting device of this invention. It is a top view which shows the other example of embodiment of the light-emitting device of this invention. It is sectional drawing which shows the other example of embodiment of the light-emitting device of this invention. It is sectional drawing which shows the other example of embodiment of the light-emitting device of this invention. It is sectional drawing which shows the other example of embodiment of the light-emitting device of this invention. It is sectional drawing which shows the other example of embodiment of the light-emitting device of this invention. It is a top view which shows the other example of embodiment of the illuminating device of this invention. It is sectional drawing of the illuminating device of FIG. It is a top view which shows the other example of embodiment of the illuminating device of this invention. It is sectional drawing of the illuminating device of FIG. It is sectional drawing which shows the other example of embodiment of the light-emitting device of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Base | substrate 1a: Mounting part 1b: Wiring conductor 1c: Concave part 2: Light emitting element 3: Optical member 3a: Protrusion 3b: The surface facing a light emitting element 3c: The side surface of a protrusion, and the surface facing a light emitting element of an optical member 4: Translucent member 5: Conductive member 6: Reflective member 6a: Inner peripheral surface

Claims (5)

A substrate;
A light emitting device mounted on the substrate;
An optical member disposed above the light emitting element and having a protrusion in contact with the substrate;
A light-emitting device provided with a translucent member provided between the base and the optical member and covering the light-emitting element. The light emitting device according to claim 1, wherein the optical member includes a plurality of the protrusions. The light-emitting device according to claim 4, wherein an angle formed between a side surface of the protrusion and a surface of the optical member facing the light-emitting element is an obtuse angle. 4. The concave portion is formed on the mounting surface of the light emitting element of the base, and the tip of the projection of the optical member is located on the bottom surface of the concave portion. The light emitting device according to 1. A light emitting device according to any one of claims 1 to 4,
A drive unit on which the light emitting device is mounted and having electrical wiring for driving the light emitting device;
A lighting device comprising: a light reflecting means for reflecting light emitted from the light emitting device.

Images