JP2016157530A - Lamp device and illuminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp device that can reduce luminance unevenness of a globe and variation in light distribution.SOLUTION: A lamp device 10 comprises a case 11, a light emitting module 13, a globe 15, a light dispersing body 14, and a cap. The light emitting module 13 comprises a light emitting part 30, and is provided on the side of one end of the case 11. The globe 15 covers the light emitting module 13, and is arranged on the side of the one end of the case 11. The light dispersing body 14 is opposed to the light emitting part 30 of the light emitting module 13 and arranged in the globe 15, and has a degree of light dispersion larger than a degree of light dispersion of the globe 15. The cap is arranged on the side of another end of the case 11.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lamp device using a light emitting module and an illumination device using the lamp device.

  2. Description of the Related Art Conventionally, there is a lamp device that uses a light emitting module in which a light emitting element is mounted on a substrate, and a lens that controls light distribution by entering light from the light emitting element.

  In the lamp device using such a lens, the light emitting module and the lens are covered with a glove, but luminance unevenness may occur in the glove due to the influence of the lens. In addition, variations in the light distribution may occur due to variations in the positional relationship between the lens and the light emitting element.

JP 2011-142060 A

  The problem to be solved by the present invention is to provide a lamp device and a lighting device that can reduce uneven brightness of the globe and variations in light distribution.

  The lamp device of the embodiment includes a housing, a light emitting module, a globe, a light dispersion body, and a power feeding unit. The light emitting module has a light emitting unit and is provided on one end side of the housing. The globe is disposed on one end side of the housing so as to cover the light emitting module. The light dispersion member is disposed in the globe so as to face the light emitting portion of the light emitting module, and the light dispersion degree is larger than the light dispersion degree of the globe. The power feeding unit is disposed on the other end side of the housing.

  According to the present invention, it can be expected to reduce uneven brightness of the globe and variations in light distribution.

It is sectional drawing (sectional drawing of AA of FIG. 3) of the lamp device which shows one Embodiment. It is sectional drawing (sectional drawing of the BB view of FIG. 3) of a lamp device same as the above. It is the front view which removed the globe of the lamp device same as the above. It is a disassembled perspective view of a lamp device same as the above. It is sectional drawing of the illuminating device using a lamp device same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 5.

  1 to 5 show a lamp device 10 which is a light bulb shaped lamp. The lamp device 10 is disposed to face the housing 11, the heat radiating plate 12, the light emitting module 13, and the light emitting module 13 disposed on one end side of the housing 11 (one end side in the central axis direction of the lamp device 10). The light dispersion body 14, the light emitting module 13, and the globe 15 attached to one end of the housing 11 covering the light dispersion body 14, the insulating case 16 disposed in the housing 11, and the housing held by the insulating case 16 A power supply circuit 17 disposed in the body 11 and a base 18 attached to the insulating case 16 and disposed on the other end side of the housing 11 are provided.

  The casing 11 is formed of a metal material such as aluminum having excellent heat dissipation. The casing 11 is formed in a cylindrical shape that expands toward one end and opens at both ends, and a cavity 21 is formed inside. A mounting surface 22 on which the heat radiating plate 12 is mounted is formed on the inner peripheral portion on one end side of the housing 11, and a cylindrical edge portion 23 that protrudes from the peripheral portion of the mounting surface 22 to one end side of the housing 11. And a mounting portion 24 for mounting the light dispersion member 14 and the globe 15 is formed to project from the inner peripheral portion of the tip of the edge portion 23. A part of the edge portion 23 and the attachment portion 24 is formed with a groove portion 25 in which the inner peripheral side of the edge portion 23 and the attachment portion 24 are notched. A plurality of bosses 26 for screwing the heat radiating plate 12 and the light emitting module 13 are provided on the inner periphery of the housing 11.

  Further, the heat radiating plate 12 is formed in a substantially disc shape by a metal material having excellent thermal conductivity, such as aluminum. The light emitting module 13 is brought into contact with one surface of the heat radiating plate 12 so as to be able to conduct heat, and the peripheral portion of the other surface of the heat radiating plate 12 is placed on the placement surface 22 of the housing 11 so as to be able to conduct heat. Note that the outer peripheral shape of the heat sink 12 is formed substantially the same as the outer peripheral shape of the substrate 29 included in the light emitting module 13.

  The light emitting module 13 includes a substrate 29, a light emitting unit 30 provided in a central area on one surface of the substrate 29, and a connector 31 mounted on a peripheral area on one surface of the substrate 29.

  The substrate 29 is made of a metal material having excellent thermal conductivity, such as aluminum, or ceramics, and is formed in a substantially disc shape. A wiring pattern (not shown) is formed on one surface of the substrate 29, and a light emitting unit 30 (a plurality of LED elements) and a connector 31 are electrically connected to the wiring pattern. A plurality of insertion grooves 32 through which screws screwed to the respective bosses 26 are inserted are formed in the peripheral portion of the substrate 29 corresponding to the positions of the respective bosses 26 of the housing 11, and wiring grooves are formed at one place. 33 is formed. A linear notch 34 is formed at four locations on the periphery of the substrate 29 so as to be closer to the center side of the substrate 29 than the outer diameter portion of the substrate 29. A part of the notch 34 is formed at one location. A positioning groove 35 is formed in the upper surface. The positioning groove 35 is provided at a position facing the groove portion 25 of the housing 11. The substrate 29 is attached to the housing 11 so that the other surface of the substrate 29 is joined to one surface of the heat sink 12. The outer peripheral shape of the heat sink 12 is formed substantially the same as the outer peripheral shape of the substrate 29, that is, the insertion groove 32, the wiring groove 33, the notch 34, and the positioning groove 35 of the substrate 29 are also provided in the heat sink 12. It is formed so that when the substrate 29 and the heat radiating plate 12 are overlapped, the shapes substantially coincide.

  The light emitting unit 30 includes a light emitting element 36. An LED element is used as the light emitting element 36, and a plurality of LED elements are mounted on the substrate 29 and the plurality of LED elements are sealed with a phosphor layer 37. That is, the light emitting module 13 is a COB (Chip On Board). ) Module is used. The surface of the phosphor layer 37 is formed as a planar light emitting surface 30 a of the light emitting unit 30. As the light emitting element 36, for example, a surface-mount SMD package including an LED element may be used, or an EL element may be used. Further, in the present embodiment, the light emitting surface 30a of the light emitting unit 30 is circular, but may be rectangular or other shapes.

  The light dispersion 14 is integrally formed of a material in which a dispersing agent (diffusing material) is mixed into a light-transmitting resin such as polycarbonate. Thereby, the light dispersion body 14 is milky white, for example, and has a light dispersibility that disperses the transmitted light as well as a light transmittance that allows the light from the light emitting unit 30 to pass therethrough. The light dispersion member 14 is positioned on the substrate 29 of the light emitting module 13 that projects from the light dispersion unit 40, fixing portions 41a and 41b that project from the light dispersion unit 40 and are fixed to the housing 11, and project from the light dispersion unit 40. Positioning portions 42a and 42b are provided.

  The light dispersion part 40 is formed in a dome shape in which the top part 40a side swells to one end side from the peripheral part 40b side and the inside facing the light emitting part 30 of the light emitting module 13 is hollow. The top portion 40a side of the light dispersion portion 40 is formed in a gently curved shape, and the peripheral portion 40b side is formed in a cylindrical shape that gradually increases in diameter from the top portion 40a side toward the other end side. The thickness of the top 40a side of the light dispersion part 40 is formed thicker than the thickness of the peripheral part 40b side, that is, the light dispersion degree on the top part 40a side is larger than the light dispersion degree on the peripheral part 40b side. Yes.

  The definition of the degree of light dispersion is that in the light amount distribution measured by irradiating the sample with light from the same light source, the emission angle θ = 0 ° from the surface of the sample is 100%, and the emission angle θ is 50%. This indicates the degree of light dispersion. The greater the exit angle θ at which the light quantity is 50%, the greater the light dispersion.

  The fixing portions 41a and 41b are a protruding portion 43 that protrudes from the peripheral portion 40b of the light dispersion portion 40 toward the substrate 29 of the light emitting module 13, and a leg that protrudes from the protruding portion 43 in parallel to the substrate 29 toward the outer diameter direction. And a claw portion 45 that protrudes from the tip of the leg portion 44 and engages with the attachment portion 24 of the housing 11.

  The positioning parts 42a and 42b protrude from the peripheral part 40b of the light dispersion part 40 toward the substrate 29 of the light emitting module 13, and project from the protruding part 46 in the outer diameter direction of the substrate 29 to be on one surface of the substrate 29. An abutting portion 47 that abuts is provided. Only the positioning part 42a is provided with a restricting part 48 that fits into the positioning groove 35 of the substrate 29 at the tip of the contact part 47. The restricting portion 48 enters the groove portion 25 of the housing 11 and is positioned between the groove portion 25 of the housing 11 and the positioning groove 35 of the substrate 29.

  The fixing portions 41a and 41b do not contact the substrate 29 of the light emitting module 13, and are bonded to the housing 11 and the globe 15 with, for example, a silicone adhesive when the lamp device 10 is assembled.

  As shown in FIG. 4, the fixing portions 41 a and 41 b are provided so as to protrude in directions opposite to each other with respect to the center of the light dispersion portion 40, and the fixing portion 41 b has a narrow width to avoid interference with the connector 31. ing. The positioning portions 42a and 42b protrude in a direction orthogonal to the fixing portions 41a and 41b and are provided at positions offset from each other with respect to the center of the light dispersion portion 40. The positioning part 42b is prevented from interfering with screws for fixing the substrate 29 and the heat radiating plate 12 to the housing 11 due to the offset. The positioning unit 42a contacts the symmetrical position from the center of the substrate 29 with respect to the position where the positioning unit 42b contacts the substrate 29 due to the offset, and the light dispersion member 14 in a state where the positioning units 42a and 42b contact the substrate 29. The posture is stable.

  The protrusions 43 of the fixing parts 41a and 41b and the protrusions 46 of the positioning parts 42a and 42b are outward (outer diameter direction) so as to move away from the light emitting part 30 as they approach the light emitting module 13 from the light dispersing part 40. It sticks out.

  In the light dispersion body 14, a light passage portion 49 through which light from the light emitting portion 30 passes is opened in a portion where the fixing portions 41a and 41b and the positioning portions 42a and 42b are not provided between the light dispersion portion 40 and the light emitting module 13. ing.

  The globe 15 is integrally formed of a material in which a dispersant (a diffusing material) is mixed into a light-transmitting resin such as polycarbonate. As a result, the globe 15 is milky white, for example, and has light transmission properties for transmitting the light transmitted through the light dispersion member 14 and the light from the light emitting unit 30 passing through the light passage unit 49, and dispersing the transmitted light. It has sex.

  The globe 15 is formed in a dome shape in which the top portion 15a side swells to one end side rather than the peripheral portion 15b side and the inside facing the light emitting module 13 and the light dispersion body 14 is hollow. The thickness of the peripheral portion 15b side of the globe 15 is thicker than the thickness of the top portion 15a side, that is, the light dispersion degree of the peripheral portion 15b side facing the light passing portion 49 is the light dispersion degree of the top portion 15a side. Is bigger than.

  In the peripheral portion 15b of the globe 15, a fitting portion 52 that fits into the inner periphery on one end side of the housing 11 is formed to protrude, and a plurality of places of the fitting portion 52 are connected to the mounting portion 24 of the housing 11. A mating claw portion 53 is provided. The fitting portion 52 is fitted between the mounting portion 24 of the housing 11 and the fixing portions 41a and 41b of the light dispersion member 14 fixed to the housing 11, and holds the light dispersion member 14.

  When the light dispersion degree of the globe 15 and the light dispersion degree of the light dispersion body 14 are compared, the light dispersion degree of the light dispersion body 14 is larger than the light dispersion degree of the globe 15.

  The insulating case 16 is formed in a cylindrical shape from an insulating resin material, and is disposed along the inside of the housing 11. On one end side of the insulating case 16, a protruding portion 56 that protrudes inside the edge portion 23 of the housing 11 is provided. Inside the protrusion 56, when the heat sink 12 and the substrate 29 are assembled into the housing 11, the heat sink 12 and the notch 34 of the substrate 29 are fitted, whereby the heat sink 12 and the heat sink 12 with respect to the housing 11 are fitted. The circumferential position of the substrate 29 is positioned. A holding portion 57 for holding the power supply circuit 17 is formed inside the insulating case 16.

  The power supply circuit 17 includes a circuit board 17a and electronic components mounted on the circuit board 17a. The circuit board 17 a is inserted and attached to the holding portion 57 of the insulating case 16, and the power circuit 17 is accommodated in the insulating case 16. The wiring connected to the circuit board 17a is drawn onto the board 29 through the heat radiation plate 12 and the wiring groove 33 of the board 29, and is electrically connected to the connector 31. The power supply circuit 17 receives AC power from the base 18, converts the AC power into predetermined DC power, supplies the power to the light emitting module 13, and causes the light emitting element 36 to emit light.

  The base 18 is, for example, an E17 type base or an E26 type base.

  FIG. 5 shows an illumination device 60 that uses the lamp device 10. The illumination device 60 is a downlight, for example. The lighting device 60 has an instrument body 61, and a socket 62 and a reflector 63 are disposed in the instrument body 61. The socket 62 is electrically connected to the base 18 of the lamp device 10 and supplies AC power to the lamp device 10.

  Then, when AC power is supplied to the lamp device 10 connected to the socket 62 of the lighting device 60, the AC power is converted into predetermined DC power by the power supply circuit 17 of the lamp device 10, and is supplied to the light emitting module 13. Light is emitted from the light emitting surface 30 a of the light emitting unit 30. The light emitted from the light emitting surface 30a of the light emitting unit 30 is incident on the light dispersing unit 40 of the light dispersion member 14 and is emitted from the surface of the light dispersing unit 40 with the emission direction being dispersed. Further, the light emitted from the surface of the light dispersion unit 40 enters the globe 15 and is emitted from the surface of the globe 15 with the emission direction dispersed.

  By using the light dispersion member 14 in this way, the luminance unevenness of the globe 15 is less likely to occur than in the case of using a lens, and variations in light distribution can be reduced.

  In addition, since the light dispersion of the light dispersion 14 has a larger relationship than the light dispersion of the globe 15, uneven brightness occurs in the globe 15 while ensuring the efficiency of light emitted from the globe 15. Can be further reduced.

  The intensity of the light emitted from the light emitting surface 30a of the light emitting unit 30 is strong in the direction perpendicular to the light emitting surface 30a and weak in the oblique direction with respect to the light emitting surface 30a, but is perpendicular to the light emitting surface 30a. The light dispersion degree on the side of the top 40a of the light dispersion part 40 facing to the light emitting surface 30a is larger than the light dispersion degree on the side of the peripheral part 40b of the light dispersion part 40 facing obliquely with respect to the light emitting surface 30a. Therefore, light with strong intensity in the direction perpendicular to the light emitting surface 30a can be dispersed, and light with weak intensity in the oblique direction with respect to the light emitting surface 30a can be efficiently emitted outside the globe 15.

  Further, a part of the light emitted in the oblique direction from the light emitting surface 30a of the light emitting unit 30 passes through the light passing part 49 of the light dispersion 14 and directly enters the globe 15. Therefore, light can be efficiently emitted from the surface of the peripheral portion 15b of the globe 15, and the luminance of the peripheral portion 15b of the globe 15 can be improved. At this time, since the light dispersion degree on the peripheral part 15b side of the globe 15 facing the light passage part 49 is larger than the light dispersion degree on the top part 15a side, the light directly incident from the light emitting surface 30a of the light emitting part 30 Dispersion can reduce the uneven brightness of the globe 15. Note that the opening angle of the light passing portion 49 with respect to the center of the light emitting module 13 on the surface of the substrate 29 on the arrangement side of the light emitting portion 30 is 15 to 40 degrees, preferably 20 to 35 degrees. Since the light in the oblique direction with the appropriate amount of light is dispersed by the light dispersion body 14, light can be supplied to the peripheral portion 15b of the globe 15 through the light passage portion 49, which tends to become dark. Unevenness can be further reduced.

  Further, when the lamp device 10 is turned on, heat generated by the light emitting element 36 is mainly transmitted to the substrate 29 and the heat radiating plate 12, and is also transmitted from the heat radiating plate 12 to the housing 11, and from the surface of the housing 11 to the outside air. Heat is dissipated. At this time, the temperature of the substrate 29 on which the light emitting element 36 is mounted is high, and the temperature of the casing 11 exposed to the outside air is lower than the temperature of the substrate 29. For example, when the lamp device 10 is a mini-krypton LED bulb having a lamp power of 5.2 W, the temperature of the substrate 29 may be about 100 ° C., and the temperature of the housing 11 is about 90 ° C.

  For example, RTI (Relative Thermal Index) is a temperature index for heat aging according to UL standards, and when exposed to a long period of time, the electrical and mechanical properties can hold more than half of the original properties. Even when a material of 120 ° C is used, yellowing (coloring) occurs during the lifetime at a temperature of 95 ° C or higher, and due to the synergistic effect of temperature increase and coloring due to light irradiation, the temperature can be higher than the RTI during the lifetime. There is sex.

  Since the positioning portions 42a and 42b of the light dispersion member 14 are in contact with the substrate 29, the heat of the substrate 29 is easily transmitted to the positioning portions 42a and 42b, and the temperature of the positioning portions 42a and 42b tends to increase. On the other hand, since the fixing portions 41a and 41b of the light dispersion body 14 are fixed to the housing 11 and are not in contact with the substrate 29, the heat of the substrate 29 is hardly transmitted to the fixing portions 41a and 41b, and the fixing portions 41a and 41b The temperature is kept lower than the positioning portions 42a and 42b. Therefore, the positioning portions 42a and 42b may be deteriorated due to the influence of heat, but the fixing portions 41a and 41b are less likely to be deteriorated due to the influence of heat, and the function of fixing the light dispersion member 14 to the housing 11 is continued. Can be maintained. In other words, the positioning portions 42a and 42b are portions that only have to be provided when positioning the light dispersion member 14, and even if the light dispersion member 14 deteriorates due to lighting or is damaged, there is no problem because the fixing portions 41a and 41b are healthy. Therefore, the positional relationship between the light dispersion member 14 and the light emitting module 13 can be maintained, a desired light distribution can be obtained, and a desired light distribution can be maintained.

  In addition, since the fixing portions 41a and 41b and the positioning portions 42a and 42b of the light dispersion member 14 project outward from the light dispersion portion 40 toward the light emitting module 13, the fixing portions 41a and 41b and the positioning portions 42a and 42b can be moved away from the light emitting element 36 of the light emitting module 13, and the fixed portions 41a and 41b and the positioning portions 42a and 42b can be reduced from being affected by light and heat from the light emitting element 36.

  In addition, since the fixing portions 41a and 41b of the light dispersion body 14 are bonded to the casing 11 and the globe 15 exposed to the outside air, the casing receives the heat received by the fixing portions 41a and 41b from the substrate 29 or the like. The heat can be efficiently radiated to 11 and the globe 15, and the temperature rise of the fixing portions 41a and 41b can be suppressed.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lamp device
11 Enclosure
13 Light emitting module
14 Light dispersion
15 Globe
18 Cap as power supply
29 Board
30 Light emitter
49 Light passage
60 Lighting equipment
62 socket

Claims (5)

A housing;
A light emitting module having a light emitting portion and provided on one end side of the housing;
A glove disposed on one end side of the housing covering the light emitting module;
A light dispersion member disposed in the globe facing the light-emitting portion of the light-emitting module and having a light dispersion degree greater than the light dispersion degree of the globe;
A power feeding unit disposed on the other end of the housing;
A lamp device comprising: The lamp device according to claim 1, wherein the light dispersion member is formed in a dome shape facing the light emitting element, and has a light dispersion degree on the top side larger than a light dispersion degree on the peripheral side. The lamp device according to claim 1, wherein the light dispersion member includes a light passage portion through which light from the light emitting element passes between the light dispersion member and the light emitting module. The light emitting module has a substrate,
The light emitting portion is provided on a surface on one end side of the substrate, and an opening angle of the light passing portion formed with respect to the center of the light emitting module on a surface of the substrate on which the light emitting portion is provided is 15 ° to 45 °. The lamp device according to claim 3, wherein the lamp device is a degree. With sockets;
The lamp device according to any one of claims 1 to 4, wherein the power feeding unit is connected to the socket.
An illumination device comprising:

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