JP5312556B2 - Light emitting device and lighting device - Google Patents

Description

  The present invention relates to a light emitting device and an illuminating device that convert the wavelength of light emitted from a light emitting element with a phosphor and radiates the light to the outside, and relates to a light emitting device and an illuminating device that shines the entire light emitting surface side of the light emitting device.

  In recent years, there is a movement to use a light emitting device using a light emitting diode (LED) or the like for illumination.

  FIG. 9 shows a light-emitting device that reflects light emitted from a light-emitting element such as a conventional light-emitting diode well on the inner peripheral surface of the frame and radiates it uniformly and efficiently to the outside. In FIG. 9, the light-emitting device is joined to a base 11 made of an insulator having a mounting portion 11a for the light-emitting element 12 on the upper surface, and an inner peripheral surface 13b while being joined to an outer peripheral portion of the upper surface of the base 11 to surround the mounting portion 11a. The frame-shaped reflecting member 13 is a reflecting surface that reflects the light emitted from the light emitting element 12, and the sealed translucent member 16 formed so as to cover the light emitting element 12 inside the reflecting member 13. A sheet-like translucent member 15 that is provided so as to cover the sealing translucent member 16 and in which phosphors are unevenly distributed in layers, and a light-emitting element 12 mounted and fixed on the mounting portion 11a It is composed of

  The frame body 13 has an upper opening larger than the lower opening, so that the inner peripheral surface 13b of the through hole is an inclined surface that spreads outward toward the upper side, and light emitted from the light emitting element 12 Is a reflecting surface that reflects upward.

  As described above, the light emitted from the light emitting element 12 is satisfactorily reflected by the inner peripheral surface 13b of the reflecting member 13, and is guided into the sheet-like translucent member 15 to be contained in the sheet-like translucent member 15. A high-luminance light emitting device that can radiate light having a desired wavelength converted by the above (see, for example, Patent Document 1 below).

JP 2006-93399 A

  However, even if the fluorescent light is uniformly emitted from the entire surface of the sheet-like translucent member 15, the fluorescent light is not emitted from the upper main surface of the reflecting member 13 around the sheet-like translucent member 15, so There was a problem that a shadow was generated around the optical member 15 and the entire upper surface of the light emitting device did not appear to emit light. That is, when a plurality of light emitting devices are arranged adjacent to each other to form an illuminating device, the entire light emitting surface of the illuminating device does not appear to emit light uniformly, but appears to be a collection of point light. There is a problem.

  Accordingly, the present invention has been completed in view of the above-described conventional problems, and an object of the present invention is to provide a light emitting device and a lighting device that appear to emit light from the entire light emitting surface side of the light emitting device. .

The light-emitting device of the present invention is provided with a base provided with a recess for accommodating a light-emitting element on the upper main surface, a light-emitting element mounted on the recess, and a light- emitting element that covers the light-emitting element inside the recess. and sealing the translucent member made comprises a, and the sheet-shaped translucent member containing disposed above phosphor of the light emitting element, an upper major surface of said sheet-like light-transmitting member and the substrate And a bonding translucent member is arranged from the upper main surface of the base to the side surface of the sheet-like translucent member .

  The light emitting device of the present invention appears to emit light from the entire top surface of the light emitting device.

It is a perspective view which shows an example of embodiment of the light-emitting device of this invention. It is sectional drawing which shows the example of embodiment in the X-X 'surface of the light-emitting device of FIG. It is sectional drawing which shows the other example of embodiment in the X-X 'surface of the light-emitting device of FIG. It is a top view which shows the other example of embodiment of the light-emitting device of this invention. It is a top view which shows an example of embodiment of the illuminating 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 a circuit diagram which shows an example of embodiment of the illuminating device of this invention. It is a diagram which shows the result of having measured the light beam discharge | released from the light-emitting device of this invention. It is sectional drawing which shows the example of embodiment of the conventional light-emitting device.

  The light-emitting device and lighting device of the present invention will be described in detail below. 1 is a perspective view showing an example of an embodiment of a light-emitting device according to the present invention, FIG. 2 is a longitudinal sectional view of the light-emitting device in FIG. 1 taken along the line XX ′, and FIG. 3 is an X of the light-emitting device in FIG. It is a longitudinal cross-sectional view which shows the other example of embodiment in -X '. FIG. 4 is a top view showing another example of the embodiment of the light emitting device of the present invention. FIG. 5 is a top view showing an example of the embodiment of the illumination device of the present invention, and FIG. 6 is a top view showing another example of the embodiment of the illumination device of the present invention.

In these figures, 1 is a base, 1a is a bottom of the base 1, 1b is a side wall of the base 1, 1c is a recess of the base 1, 1d is an inner peripheral surface of the side wall 1b, and 1e is a light emission provided in the recess 1c. Mounting portion of the light emitting element 2 on which the element 2 is placed, 1f is an upper main surface of the base 1 (side wall portion 1b), 3 is a stepped portion, 3a is an inner bottom surface of the stepped portion 3, and 3b is an inner surface of the stepped portion 3. 1 g is a chamfered portion, 5 is a sheet-like translucent member containing a phosphor, 5 a is an outer peripheral side surface of the sheet-like translucent member 5, 6 is a sealing translucent member, 7 is a bonded translucent member, 8 is a space | gap, 9 is a convex part, 10 is a recessed part. The light emitting device and the illuminating device of the present invention in which light emitted from the light emitting element 2 is radiated to the outside mainly by the base 1, the light emitting element 2, and the sheet-like translucent member 5 are configured.

As shown in FIGS. 1 to 3, the light-emitting device of the present invention includes a base body 1 provided with a recess 1 c that accommodates the light-emitting element 2 on the upper main surface, a light-emitting element 2 mounted on the recess 1 c, and a light-emitting element. 2 and a sheet-like translucent member 5 containing a phosphor disposed above 2, and in plan view, the size of the sheet-like translucent member 5 is smaller than the size of the substrate 1, and the sheet by Jo translucent member 5 is disposed so as to protrude upward from the upper surface 3a of the base 1, the outer peripheral side surface of the sheet-like light-transmitting member 5 is of the base 1 around the concave portion 1c an upper major surface 1f Is facing.

The substrate 1 in the present invention is made of an aluminum oxide sintered body (alumina ceramic), an aluminum nitride sintered body, a mullite sintered body, ceramics such as glass ceramics, a resin such as an epoxy resin, or a metal. The substrate 1 has a mounting portion 1e for mounting the light emitting element 2 on the bottom surface of the recess 1c in the recess 1c, and tungsten (W) to which the electrode of the light emitting element 2 is electrically connected is mounted on the mounting portion 1e. ), A connection pad 1h made of a conductor layer mainly composed of a metal made of molybdenum (Mo) -manganese (Mn), or a lead terminal made of a copper (Cu), iron (Fe) -nickel (Ni) alloy, or the like. 1h connection pad molded integrally with
Has been derived.

  The electrode of the light emitting element 2 is electrically connected to the upper surface of the connection pad 1h via an electrical connection means such as solder. The connection pad 1h is led out to the outer surface of the light emitting device via a wiring conductor (not shown) formed inside the base 1, and further connected to an external electric circuit board, whereby the light emitting element 2 and the external electric circuit are connected. Are electrically connected to each other.

  For the light emitting element 2, an LED (Light Emitting Diode), a laser diode (LD), an electroluminescence (EL) element, other solid light emitting elements, or the like is used.

  As a method of connecting the light emitting element 2 to the connection pad 1h, a method of connecting via a bonding wire or a flip chip bonding method in which the light emitting element 2 is connected to the lower surface of the light emitting element 2 by an electric connecting means such as a metal ball or a solder bump is used. The method that was used is used. Preferably, as shown in FIG. 2 and FIG. 3, the connection is made by a flip chip bonding method. Thereby, since the connection pad 1h can be provided immediately below the light emitting element 2, it is not necessary to provide a space for providing the connection pad 1h on the upper surface of the substrate 1 around the light emitting element 2. Therefore, it is possible to prevent the light emitted from the light emitting element 2 from being absorbed by the connection pad 1h of the base 1 and the on-axis luminous intensity from being lowered.

  The conductor layer serving as the connection pad 1h is formed by, for example, forming a metallized layer of a metal powder such as W, Mo, Cu, or Ag on the surface and inside of the base 1, or a lead such as an Fe-Ni-Co alloy. The terminal is embedded in the base 1 and one end thereof is exposed to the mounting portion 1e, or the input / output terminal made of an insulator on which the conductor layer is formed is fitted and joined to the through hole provided in the base 1 made of metal or the like. Is provided.

The exposed surface of the connection pad 1h is preferably coated with a metal having excellent corrosion resistance, such as Ni or gold (Au), with a thickness of about 1 to 20 μm, so that the oxidation corrosion of the connection pad 1h is effective. In addition, the connection between the light emitting element 2 and the connection pad 1h can be strengthened. Therefore, on the exposed surface of the connection pad 1h, for example, a Ni plating layer having a thickness of about 1 to 10 μm and a thickness of 0.1 to 3 are used.
It is more preferable that the Au plating layer of about μm is sequentially deposited by an electrolytic plating method or an electroless plating method.

  In addition, the base 1 may be formed by separately manufacturing the bottom 1a and the side wall 1b and joining them. In this case, an aluminum oxide sintered body, an aluminum nitride sintered body, a mullite sintered body, ceramics such as glass ceramics, a resin such as an epoxy resin, or a plate-like bottom portion 1a made of metal, The side wall 1b is attached by a bonding material 4 such as an epoxy resin or an acrylic resin, or a bonding material 4 such as a metal brazing material. Preferably, the bonding material 4 is made of a resin adhesive, and the bonding material 4 absorbs a difference in thermal expansion between the bottom portion 1a and the side wall portion 1b when the bonding material 4 is made of an elastic resin adhesive. It can relieve and can prevent breakage, such as a crack, in bottom 1a or side wall 1b.

  The side wall portion 1b is formed such that the through hole is inclined toward the upper outer side in the central portion, and the inner peripheral surface 3b of the through hole is a reflecting surface that reflects light emitted from the light emitting element 2. ing. Then, the inner peripheral surface 3 b is attached to the upper surface of the bottom portion 1 a so as to surround the light emitting element 2.

The side wall part 1b consists of a metal, ceramics, resin, etc., and is formed by performing a cutting process, metal mold forming, etc. Further, the reflecting surface formed on the inner peripheral surface 3b of the through hole is not particularly limited as long as it reflects light, but in order to obtain a higher reflectance, the inner peripheral surface 3b of the through hole may be polished. Smoothing by pressing a mold or the like, or Al, Ag, Au, platinum (Pt), titanium (Ti), for example, by plating or vapor deposition on the inner peripheral surface 3b of the through hole
A reflective surface is formed by forming a metal thin film layer having a high reflectance such as chrome (Cr) or Cu. In addition, the shape of the through hole in plan view may be any of a polygon, a circle, and an ellipse.

  The inner peripheral surface 3b serving as the reflecting surface has, for example, a linear inclined surface as shown in FIGS. 2 and 3 whose longitudinal cross-sectional shape spreads outward as it goes upward, and outward as it goes upward. Examples of the shape include a curved curved inclined surface, for example, a parabolic surface where the position of the light emitting element 2 is a focal position, or a linear inclined surface whose inclination angle changes in the middle.

As shown in FIGS. 1 to 3, a sheet-like translucent member 5 containing a phosphor is placed on the upper main surface 1 f of the base 1 so as to cover the opening of the recess 1 c. The size in a plan view of the sheet-like light transmitting member 5 is smaller than the size in plan view of the periphery of the substrate 1, therefore, from the outer peripheral side surface 5a of the sheet-like light-transmitting member 5 of the base 1 is the entire circumference of the outer Upper main surface 1f is exposed and arranged. The sheet-like translucent member 5 is placed so as to protrude from the upper main surface 1 f of the base 1. Thereby, the outer peripheral side surface 5a of the sheet-like translucent member 5 is arranged so that at least a part thereof is above the upper main surface 1f, and the outer peripheral side surface 5a and the upper main surface 1f face each other at a substantially right angle. It faces like so. Since the upper main surface 1f of the base 1 around the sheet-like light-transmitting member 5 is arranged to be illuminated by the light emitted from the outer peripheral side surface 5a of the sheet-like light transmitting member 5, The light irradiated on the upper main surface 1 f is then reflected upward, so that no shadow is generated around the sheet-like translucent member 5.

The sheet-like translucent member 5 is made of a transparent resin such as an epoxy resin or a silicone resin that contains a phosphor that is excited by light emitted from the light-emitting element 2 and converted into long-wavelength fluorescence. The sheet-like translucent member 5 is molded into a sheet shape similar to the outer peripheral shape of the upper main surface 1f of the base body 1 in a plan view by molding using a mold, or becomes the sheet-like translucent member 5. A sheet-like transparent resin is prepared in advance and punched using a punching die to form the sheet-like translucent member 5 in a shape similar to the outer peripheral shape of the upper main surface 1f. And this sheet-like sheet-like translucent member 5 is mounted on the upper side main surface 1f of the frame-like side wall portion 1b by mounting and fixing it on the upper side of the substrate 1. By making the planar view shape of the sheet-like translucent member 5 similar to the planar view shape of the upper main surface 1f of the side wall portion 1b, it is possible to reduce shadows generated around the light emitting device.

Here, it is desirable that the sheet-like translucent member 5 has a constant thickness and that the granular phosphor is uniformly dispersed. Thereby, the light emitted from the light emitting element 2 can be efficiently wavelength-converted to the long wavelength side by the phosphor, and light having a desired wavelength spectrum can be obtained. In addition, since the phosphor scatters a part of the light emitted from the light emitting element 2 to the adjacent phosphor, uniform fluorescence can be emitted from the sheet-like translucent member 5. The light whose wavelength has been converted by the phosphor is emitted from the phosphor in all directions, and is also emitted from the outer peripheral side surface 5a of the sheet-like translucent member 5 in all directions.

For the purpose of the present invention, it is preferable that at least the upper main surface 1 f of the substrate 1 is white with respect to the fluorescent color of the phosphor contained in the sheet-like translucent member 5. That is, the upper main surface 1f is a surface that reflects as efficiently as possible without absorbing the fluorescence emitted by the sheet-like translucent member 5. Moreover, it is preferable that the light emitted from the light emitting device does not substantially include the direct light of the light emitting element 2. That is, the light emitted from the light emitting device is preferably fluorescence emitted by the phosphor contained in the sheet-like translucent member 5. For example, in the case of a white light-emitting device, red light is applied to the sheet-like translucent member 5. , Phosphors emitting three primary colors of light such as blue and green. Then, using the light emitting element 2 that emits blue light or ultraviolet light, the wavelength is converted to the longer wavelength side by the phosphor.

Preferably, the width dimension B of the upper main surface 1f of the base 1 exposed around the sheet-like translucent member 5 is made uniform over the entire circumference. Thereby, the luminance of the upper main surface 1f arranged in a frame shape around the sheet-like translucent member 5 can be made uniform in the circumferential direction of the upper main surface 1f. In addition, that the width dimension B is uniform over the entire circumference means that the width dimension should be constant so that the difference in luminance is not noticeable.

More preferably, 1, 2, 3, the protruding dimension A from an upper major surface 1f of the sheet-like light transmitting member 5, the upper main exposed the entire periphery around the sheet-like light-transmitting member 5 It is good to set it as 0.75 times or more of the width dimension B of the surface 1f.

FIG. 8 shows light emitted to the light emitting surface side (upward) of the light emitting device of the present invention when the projecting dimension A of the sheet-like translucent member 5 is changed with respect to the width dimension B of the upper main surface 1f. The result of measuring the luminous flux of is shown. In FIG. 8, as the protruding dimension A increases, the amount of light emitted from the outer peripheral side surface 5a of the sheet-like translucent member 5 and reflected by the upper main surface 1f of the base 1 increases, so that the protruding dimension A becomes wider. The luminous flux increases to the same extent as the dimension B, and when the protruding dimension A becomes larger than the width dimension B, the light that is not reflected by the upper main surface 1f and does not go upward of the light emitting device increases. It is considered that the relationship shows that the luminous flux gradually decreases.

  Then, from the result shown in FIG. 8, when the projection dimension A is 0.75 times the width dimension B of the upper main surface 1f, there is almost no visual difference with respect to the maximum luminous flux 1.32 (lm). It can be seen that 1.31 (lm) is reached. Therefore, it can be seen that, by setting the protrusion dimension A to be 0.75 times or more with respect to the width dimension B of the upper main surface 1f, it is practically possible to obtain a light emitting device that appears to emit light uniformly from the light emitting surface side. . The light flux tends to decrease rapidly as the protrusion dimension A decreases from 0.75 times. And it can use suitably in the range until the protrusion dimension A becomes a double size of the width dimension B. Furthermore, if the dimension of the protruding dimension A is equal to or larger than the width dimension B and is in the range of 1.4 times or less, a more preferable light emitting device can be obtained.

Thus, as shown in FIG. 1, light emitted from the sheet-shaped sheet-like outer peripheral side surface 5a of the light transmitting member 5 containing the phosphor, the sheet-like translucent around the sheet-like light-transmitting member 5 Is reflected in all directions by the upper main surface 1f arranged in a frame shape so as to surround the luminescent member, and when the light emitting device is viewed from above, the entire upper surface of the light emitting device is not shadowed around the light emitting device. Thus, a light emitting device that appears to emit light uniformly can be obtained.

Further, as shown in FIG. 3, a stepped portion 3 is preferably formed between the upper main surface 1f of the base 1 and the inner peripheral surface 1d. When the sheet-like translucent member 5 containing the phosphor is placed on the inner bottom surface 3a of the stepped portion 3c, the sheet-like translucent member 5 is easily aligned by the inner side surface 3b of the stepped portion 3. When the sheet-like translucent member 5 containing a phosphor is placed on the upper main surface 1f of the base 1, if the sheet-like translucent member 5 is displaced in the surface direction, the sheet-like translucent member 5 is transmitted. As a result, the distribution of direct light from the light emitting element 2 that leaks out above the sheet-like translucent member 5 becomes uneven, and color tone abnormality may occur.

The step portion 3 has an inner bottom surface 3a formed in parallel with the upper main surface 1f of the base 1 and an inner side surface 3b formed perpendicular to the inner bottom surface 3a. That is, the stepped portion 3 is formed so as to cut out the inner peripheral surface 3b at a right angle, so that the outer peripheral side surface 5a of the sheet-like translucent member 5 can be dropped along the inner side surface 3b of the stepped portion 3. For example, the sheet-like translucent member 5 can be accurately positioned by the inner side surface 3b of the stepped portion 3, and is placed on the bottom surface 3a.

Further, by such a stepped portion 3 is formed, when injecting the sealing translucent member 6 in the recess 1c of the base body 1, the inner bottom surface 3a of the sealing translucent member 6 is stepped portion 3 in the mark, so as not to exceed the inner bottom surface 3a can be injected inside the recess 1c, it is possible to improve the work efficiency due to injection of sealing translucent member 6 using a dispenser or the like, a sealing Toru Optical member 6
Can be injected almost exactly in a predetermined amount.

Further, by forming the stepped portion 3 on the upper side of the inner peripheral surface 1d, it is possible to prevent the sealed translucent member 6 that tends to wet and spread so as to scoop up on the inner peripheral surface 1d with the inner bottom surface 3a. It is possible to stabilize the surface shape of the upper surface of the sealing translucent member 6 injected inside the recess 1c. As a result, the emission angle of light emitted from the upper surface of the sealed translucent member 6 for light emitted from the light emitting element 2 can be made constant, and emitted from the upper surface of the sealed translucent member 6. The light emission intensity can be kept constant without any variation in the light output.

In plan view, the inner side surface 3 b is formed to be slightly larger than the outer shape of the sheet-like translucent member 5. The corners of the inner side surface 3b are connected with a chamfered shape such as an arc or a straight line so that no corner is formed between the surfaces of the inner side surfaces 3b adjacent to each other. When the sheet-like translucent member 5 is placed on the stepped portion 3, a gap 8 is provided between the outer peripheral side surface 5a of the sheet-like translucent member 5 and the inner side surface 3b of the stepped portion 3, and the sheet in the corners of the Jo translucent member 5, it is preferable to so as to lightly contact the corner provided with the chamfered shape of the step portion 3. The gap 8 has such a size that the outer peripheral side surface and the inner side surface 3b of the sheet-like translucent member 5 do not come into contact with each other due to a difference in thermal expansion in the operating temperature range. It may be about mm.

Accordingly, if the sheet-like translucent member 5 is inserted from the upper surface of the stepped portion 3, the sheet-like translucent member 5 can be easily aligned and generated from the light emitting element 2 when the light emitting element 2 is operated. Even if a difference in thermal expansion occurs between the substrate 1 and the sheet-like translucent member 5 due to the heat that is generated, the difference in thermal expansion can be absorbed by the gap 8 and the sheet-like translucent member 5 is warped and deformed. Or the sheet-like translucent member 5 can be prevented from being peeled off from the substrate 1. Further, the sheet-like translucent member 5 is not deformed so as to be compressed, and the density of the phosphor contained therein is not uneven. Therefore, it is possible to effectively prevent unevenness in the intensity of light emitted from the light emitting device.

  The stepped portion 3 and the inner bottom surface 3a are provided integrally with the base 1 or the side wall 1b of the base 1, and are formed by performing cutting or molding when the base 1 or the side wall 1b of the base 1 is manufactured. Is done. Alternatively, the side wall portion 1b is formed as a separate upper and lower body with the stepped portion 3 as a boundary, and these are stacked and joined.

Preferably, as shown in FIGS. 2 and 3, a sealing light-transmissive member 6 is disposed in the recess 1 c so as to cover the light emitting element 2. The sealing translucent member 6 is formed by pouring an uncured liquid material onto the upper surface of the light emitting element 2 with an injection machine such as a dispenser and then curing the liquid. By providing the sealing translucent member 6, the light emitting element 2 can be protected and light emitted from the light emitting element 2 can be easily guided to the outside.

That is, when the sealing translucent member 6 is not filled, light is emitted from the light emitting element 2 into the air in the recess 1c, and the difference between the refractive index of the light emitting element 2 and the refractive index of air is different. The light emitted from the light emitting element 2 may return to the inside of the light emitting element 2 in some cases. When the sealing light-transmitting member 6 is filled, the sealing light-transmitting member 6 has a refractive index between the refractive index of the light-emitting element 2 and the refractive index of air. Can be easily led out of the light emitting element 2.

A transparent member made of a transparent resin such as an epoxy resin or a silicone resin, sol-gel glass, or the like is used for the sealing translucent member 6. The same material as the sheet-like translucent member 5 or a different kind of material may be used. Note that the light emitted from the upper surface of the sheet-like light transmitting member 5, so it is preferable light emitted from the outer peripheral side surface 5a of the sheet-like light transmitting member 5 is to be the same color the same intensity The phosphor is preferably contained only in the sheet-like translucent member 5, and the sealing translucent member 6 is preferably made of a transparent resin or glass.

Here, preferably, the thickness of the sealing translucent member 6 is not less than twice the thickness of the light emitting element 2. Thereby, the sealing translucent member 6 is reliably provided on the surface of the light emitting element 2, and the light emitted from the light emitting element 2 can be easily led out of the light emitting element 2. When the thickness of the sealing translucent member 6 is less than twice the thickness of the light-emitting element 2, the surface of the light-emitting element 2 is caused by variation in the amount generated when pouring the top surface of the light-emitting element 2 with an injection machine such as a dispenser. There is a possibility that a problem that the sealing translucent member 6 is not provided may occur.

Further, as shown in FIGS. 2 and 3, the sheet-like translucent member 5 containing the phosphor is fixed to the upper main surface 1f of the base body 1 by the bonded translucent member 7 on the outer peripheral side surface 5a. Is good. Into the upper surface 1f of the sheet-like light transmitting member 5 is the substrate 1, while being firmly secured by the bonding translucent member 7, bonding the light-transmitting member 7, the sheet-like light-transmissive member containing a fluorescent material 5 emits light emitted from the outer peripheral side surface 5a to the upper main surface 1f disposed over the entire circumference of the sheet-like translucent member 5. Accordingly, the amount of light applied to the upper main surface 1f increases, and the upper main surface 1f can be made brighter.

Moreover, when the protrusion dimension A of the sheet-like translucent member 5 and the width dimension B of the upper main surface 1f are set to the same dimension, the surface of the bonded translucent member 7 is the sheet-like translucent member 5. From the upper end of the outer peripheral side surface 5a to the outer peripheral end of the upper main surface 1f, it becomes an average inclined surface of 45 °, and the effect of guiding the light emitted from the outer peripheral side surface 5a of the sheet-like translucent member 5 to the upper main surface 1f is enhanced. Can do.

Note that the bonded translucent member 7 preferably does not contain a phosphor. This is because, when the bonding light-transmitting member 7 contains a phosphor, when the bonding light-transmitting member 7 is poured onto the upper main surface 1f of the base body 1, a color tone change such as precipitation occurs and the color tone variation is likely to occur. Because it will end up. In addition, there is a method of curing by taking time into account in consideration of precipitation, but the uncured bonded translucent member 7 flows to the outer peripheral portion of the base 1, and as a result, color variation may occur. is there.

  In the light emitting device of the present invention, as shown in FIG. 4, the substrate 1 is preferably provided with a chamfered portion 1 g at at least one of the outer peripheral corners of the substrate 1 in plan view. This is because when the light emitting device is mounted on the external electric circuit board, it is a mark for easily discriminating the mounting direction of the light emitting device with respect to the positive electrode and the negative electrode provided on the external electric circuit board. It is sufficient that the chamfered portion 1g is provided at one place on the outer peripheral corner portion of the base 1.

  Further, as shown in FIG. 4, in the light emitting device, the outer peripheral shape of the substrate 1 in a plan view may be a polygon having opposite sides parallel to each other, for example, a rectangle, a square, a hexagon, or the like. As a result, a plurality of light emitting devices can be arranged adjacent to each other so as to be spread without gaps and mounted on the drive unit, and a surface emitting illumination device can be obtained.

  The lighting device of the present invention includes a substrate having a light emitting device mounted thereon and having an electrical wiring for driving the light emitting device, and a light emitting device having the above-described configuration that is arranged in a plurality so as to be adjacent to each other and mounted on the substrate. . Thereby, it is possible to provide a surface emitting illumination device in which the entire light emitting surface emits light uniformly in the direction in which the light emitting elements are arranged.

  For example, as shown in FIG. 5, when a plurality of light emitting devices are arranged in a row on a drive unit such as a circuit board, a continuous linear light source is lit along the row of light emitting devices. Looks like. Note that when the light emitting device is mounted using a mounting machine, it is necessary to provide some space between the light emitting devices.

  Further, as shown in FIG. 6, a convex portion 9 is provided on one side of the outer peripheral portion of the substrate 1, a concave portion 10 is provided on a parallel side opposite to the one side, and a plurality of the light emitting devices are arranged in a line. By arranging the convex portions 9 of the light emitting devices adjacent to the concave portions 10 to be fitted, it becomes easy to connect the light emitting devices in a row. Moreover, the convex part 9 and the recessed part 10 can be used also as a mark which determines the mounting direction of a light-emitting device.

  Furthermore, if the light emitting devices arranged in a single row are arranged so as to be adjacent to each other in a plurality of rows, a lighting device that appears to emit light in a planar shape can be obtained. 5 and 6 show the case where the outer peripheral shape of the light emitting device is a square. For example, the light emitting device has a hexagonal shape, and is provided with convex portions 9 on one side and two sides adjacent thereto, and two sides facing these sides. It is also possible to provide the recesses 10 in the arrangement and arrange them so as to be spread in a flat shape so that the projections 9 and the recesses 10 are fitted. When the hexagonal light emitting devices are arranged in this way, the light emitting devices arranged in a row are arranged between the light emitting devices arranged in adjacent rows, as in a so-called staggered arrangement. It can be set as the illuminating device which seems to be more uniform surface light emission.

  5 and 6, a light emitting device that emits warm color light (warm color light emitting device) and a light emitting device that emits daylight color light (light that looks a little bluish). And daylight color light emitting devices) may be arranged alternately. In this case, the warm color light emitting device and the daylight color light emitting device are connected to a circuit as shown in FIG. 7, for example. Then, the daylight color light emitting device emits light by turning on the GND1, and the warm color light emitting device emits light by turning on the GND2. Further, when both the GND1 and GND2 switches are turned on, both the daylight color light emitting device and the warm color light emitting device emit light, and it appears that an intermediate color between the daylight color system and the warm color light is emitted. That is, by using a circuit as shown in FIG. 7, an illuminating device capable of emitting light in three patterns of color tone is obtained.

  5 to 7, D represents a diode, and R represents a resistance. As shown in FIG. 7, the diode D is connected in parallel in the reverse direction to the light emitting devices connected in the forward direction. This prevents an overvoltage from being applied to the light emitting device, and prevents the light emitting element 2 mounted on the light emitting device from being electrically damaged. In addition, as shown in FIG. 7, the resistor R is connected in series with the light emitting device, so that the current flowing through the light emitting device can be stabilized and the light emission intensity of the light emitting device can be constant.

The warm color light emitting device and the daylight color light emitting device can be manufactured by changing the blending of the phosphors contained in the sheet-like translucent member 5. In addition, by using a light emitting device that emits red, blue, and green fluorescent colors, the lighting device of the present invention can be a color display.

In addition, the lighting device may be provided with a transparent ultraviolet cut film (not shown) above the sheet-like light - transmitting member of the light-emitting device serving as the light-emitting surface so as to cover the light-emitting device. Thereby, the ultraviolet rays contained in the light emitted from the light emitting element can be shielded. For example, by using an illuminating device provided with an ultraviolet cut film as an exhibition lighting fixture, it is possible to prevent ultraviolet degradation such as sunburn from occurring in an exhibit.

  Examples of such lighting devices include general lighting fixtures, chandelier lighting fixtures, residential lighting fixtures, office lighting fixtures, store lighting, display lighting fixtures, and street lamp lighting fixtures that are used indoors and outdoors. , Guide light fixtures 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 lighting fixtures, flashlights , Electronic bulletin boards and the like, backlights such as dimmers, automatic flashers, displays, moving image devices, ornaments, illuminated switches, optical sensors, medical lights, in-vehicle lights, and the like.

  In addition, this invention is not limited to the example of the above embodiment, If it is in the range which does not deviate from the summary of this invention, it will not interfere at all.

  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.

1: Base 1a: Bottom 1b: Side wall 1c: Recess 1d: Inner peripheral surface 1e: Mounting portion 1f: Upper main surface 1g: Chamfered portion 2: Light emitting element 3: Stepped portion 3a: Inner bottom surface 3b (of the stepped portion): Inner side surface (of stepped portion) 5: sheet-like translucent member 5a: outer peripheral side surface (of sheet-like translucent member) 6: sealing translucent member 7: bonded translucent member 8: gap

Claims (7)

A base provided with a recess for accommodating the light emitting element on the upper main surface;
A light emitting element mounted in the recess;
A sealed translucent member provided so as to cover the light emitting element inside the recess,
Become comprises a, and the sheet-shaped translucent member containing disposed above phosphor of the light emitting element,
While installing the sheet-like translucent member so as to protrude upward from the upper main surface of the base,
A light-emitting device, wherein a bonded translucent member is disposed from an upper main surface of the substrate to a side surface of the sheet-like translucent member . The light-emitting device according to claim 1, wherein the sealing translucent member is provided to be spaced apart from the sheet-like translucent member. The light emitting device according to claim 2, wherein an upper surface of the sealing translucent member is formed in a concave shape. The stepped portion is provided in the recessed portion opening of the base so that the recessed portion expands outward, and the sheet-like translucent member is placed on the stepped portion. Light-emitting device. The light emitting device according to claim 4, wherein a gap is provided between an outer peripheral side surface of the sheet-like translucent member and an inner side surface of the stepped portion. 6. An illuminating device comprising: a light emitting device according to claim 1, wherein a plurality of the light emitting devices are arranged adjacent to each other; and a substrate having electric wiring for driving the light emitting device. The illumination device according to claim 6, wherein an ultraviolet cut film is provided above the sheet-like translucent member of the light emitting device.

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