Lamp device

Abstract

To provide a lamp device that can greatly increase the spread of light. [Solution] The lamp device 10 comprises a housing 11, a translucent cover 14, and a light source module 13. The translucent cover 14 is positioned to cover one side of the housing 11. The light source module 13 has a substrate 33 positioned on one side of the housing 11 and a plurality of light-emitting elements 34 mounted on the surface of the substrate 33 facing the translucent cover 14. At least a portion of the light-emitting elements 34 protrudes toward the translucent cover 14 side beyond the edge of one side of the housing 11.

Description

Technical Field

[0001] Embodiments of the present invention relate to a lamp device.

Background Art

[0002] Conventionally, there are, for example, flat lamp devices using a GX53 base, and bulb-shaped lamp devices using, for example, an E26 base or an E17 base. In such a lamp device, a light source module in which a plurality of light-emitting elements are mounted on a substrate is disposed on one side of the housing, and a translucent cover that covers one side of the housing is disposed. However, there are cases where it is desired that the spread of light is large.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide a lamp device capable of increasing the spread of light.

Means for Solving the Problems

[0005] The lamp device according to the embodiment includes a housing, a translucent cover, and a light source module. The translucent cover is disposed so as to cover one side of the housing. The light source module includes a substrate disposed on one side of the housing and a plurality of light-emitting elements mounted on a surface of the substrate facing the translucent cover. At least a part of the light-emitting elements protrudes toward the translucent cover side rather than the end on one side of the housing.

Effects of the Invention

[0006] According to the embodiment, it can be expected to increase the spread of light.

Brief Description of the Drawings

[0007] [Figure 1] This is an exploded perspective view of a lamp device showing one embodiment. [Figure 2] This is a perspective view showing the base of the lamp device shown above. [Figure 3] This is a cross-sectional view of the same lamp device. [Figure 4] This is a side view of the same lamp device. [Modes for carrying out the invention]

[0008] One embodiment will be described below with reference to the drawings.

[0009] Figures 1 to 4 show a flat-type lamp device 10. In the following description, the side from which light is emitted from the lamp device 10 will be referred to as the front (upper side in each drawing), the other side as the back, and the side where the front and back intersect will be referred to as the side.

[0010] The lamp device 10 comprises a housing 11, a base 12 provided on the rear side of the housing 11, a light source module 13 and a translucent cover 14 located on the front side of the housing 11, and a power supply circuit (not shown) housed inside the housing 11.

[0011] The housing 11 is made of an insulating resin material. The housing 11 has a cylindrical peripheral wall portion 20 with an open front side and a rear portion 21 that covers the rear side of the peripheral wall portion 20, and a mouthpiece 12 is formed on the rear portion 21.

[0012] The housing 11 contains a heat dissipation member 22, cover members 23 and 24, and a mounting member 25. The heat dissipation member 22 is made of metal and is arranged from the peripheral wall portion 20 to the rear portion 21. The cover members 23 and 24 are each made of insulating resin and are combined to form a housing space 26 for housing the power supply circuit. The center of the cover member 23 facing the rear portion 21 of the housing 11 is open, and the housing space 26 is formed in communication between this opening and the inside of the socket 12 of the housing 11. The mounting member 25 is made of metal, for example, and has a disc-shaped mounting surface portion 27 that is located on the front side of the housing 11 and to which the light source module 13 is attached, and a peripheral surface portion 28 that protrudes from the periphery of the mounting surface portion 27 to the rear side and is located inside the heat dissipation member 22. The front of the mounting surface portion 27 is located inside the housing 11, beyond the end 20a of the peripheral wall portion 20, which is the front end of the housing 11. The mounting member 25 used to attach the light source module 13 constitutes part of the housing 11.

[0013] Furthermore, the base 12 is a GX53 type base, with a hollow cylindrical projection 30 protruding from the center of the rear portion 21 of the housing 11, and a pair of electrode pins 31 arranged from the periphery of the rear portion 21. The pair of electrode pins 31 penetrate the housing 11 and the cover member 23 and are electrically connected to the power supply circuit.

[0014] Furthermore, the light source module 13 includes a disc-shaped substrate 33, a plurality of light-emitting elements 34 mounted on the mounting surface 33a, which is the first substrate surface on the front side of the substrate 33, and first and second connectors 35 and 36.

[0015] The circuit board 33 is positioned on the front side of the housing 11, and is located inside the housing 11 beyond the end 20a of the peripheral wall portion 20, which is the front end of the housing 11. A wiring pattern for mounting the light-emitting element 34 and connectors 35 and 36 is formed on the mounting surface 33a of the circuit board 33. The side of the circuit board 33 opposite to the mounting surface 33a is in contact with the mounting surface portion 27 of the mounting member 25 and is attached by a plurality of screws 37 in a thermally connected state. A thermal conductive material such as a thermal conductive sheet or thermal conductive grease may be interposed between the circuit board 33 and the mounting member 25. The circuit board 33 is provided with wiring holes 38 for passing wiring that connects to the power supply circuit.

[0016] The light-emitting element 34 includes a plurality of first light-emitting elements 39 arranged in the central area of ​​the substrate 33, and a plurality of second light-emitting elements 40 arranged along the peripheral area of ​​the substrate 33.

[0017] The first light-emitting element 39 uses an SMD (Surface Mount Device) package on which an LED chip is mounted, and has a light distribution characteristic in which the luminous intensity peak is in the 0° direction (virtual optical axis direction) perpendicular to the front light-emitting surface. The first light-emitting element 39 is mounted with its front light-emitting surface perpendicular to the mounting surface 33a of the substrate 33, and emits light with a luminous intensity peak perpendicular to the mounting surface 33a of the substrate 33. The first light-emitting elements 39 are arranged vertically and horizontally on the substrate 33 with a predetermined first spacing between them.

[0018] The second light-emitting element 40 is a rectangular or cubic LED element that emits light from the front and sides, and has a wider beam angle than the first light-emitting element 39, with a light distribution characteristic that has a luminous intensity peak at approximately 60 to 90° with respect to the 0° direction (virtual optical axis direction) perpendicular to the front. The second light-emitting element 40 is mounted with its front facing perpendicular to the mounting surface 33a of the substrate 33, and emits light with a luminous intensity peak in the lateral direction perpendicular to the mounting surface 33a of the substrate 33. The second light-emitting elements 40 are arranged on the same circumference of the substrate 33 with a second spacing that is wider than the first spacing between the first light-emitting elements 39.

[0019] The second light-emitting element 40 has a height that protrudes from the mounting surface 33a of the substrate 33 higher than that of the first light-emitting element 39. While the first light-emitting element 39 is located inside the housing 11 rather than at the end 20a of the peripheral wall portion 20 which is the front-side end of the housing 11, it protrudes toward the light-transmissive cover 14 side rather than the end 20a of the peripheral wall portion 20 which is the front-side end of the housing 11. Note that the protrusion toward the light-transmissive cover 14 side from the housing 11 is not limited to a part of the tip side of the second light-emitting element 40. Depending on the arrangement of the second light-emitting element 40 with respect to the substrate 33 and the change in the arrangement of the substrate 33 with respect to the housing 11, the entire second light-emitting element 40 may protrude toward the light-transmissive cover 14 side.

[0020] The first connector 35 is electrically connected to the first light-emitting element 39 through the wiring pattern of the substrate 33. The second connector 36 is electrically connected to the second light-emitting element 40 through the wiring pattern of the substrate 33. The connectors 35 and 36 are arranged in the vicinity of the wiring holes 38 of the substrate 33.

[0021] The connectors 35 and 36, the screws 37, and the wiring holes 38 are respectively disposed in the region between the first light-emitting element 39 and the second light-emitting element 39 on the substrate 33.

[0022] Also, the light-transmissive cover 14 is formed in a disk shape, for example, made of resin and having light-transmittance, and is attached to the peripheral wall portion 20 of the housing 11 covering the front side of the housing 11. A Fresnel lens 42 is formed on the inner surface of the light-transmissive cover 14 facing the light source module 13. The Fresnel lens 42 emits the light incident from the light-emitting element 34 in a direction perpendicular to the outer surface which is the front surface of the light-transmissive cover 14.

[0023] In FIG. 3, a Fresnel lens 42 is also formed in the peripheral region of the inner surface of the light-transmissive cover 14 facing the front side of the second light-emitting element 40. However, when increasing the spread of light in the side direction, the peripheral region of the inner surface of the light-transmissive cover 14 facing the front side of the second light-emitting element 40 may be provided with a diffusion surface subjected to a diffusion process instead of the Fresnel lens 42, or a lens structure that emits the light incident from the second light-emitting element 40 in the side direction may be provided.

[0024] Furthermore, the power supply circuit is housed and positioned in the housing space 26 within the housing 11, and is electrically connected to a pair of electrode pins 31 to receive AC power from an external source. The input AC power is converted into a predetermined illuminating power, which is DC power, and supplied to the light-emitting element 34 to light up the light-emitting element 34.

[0025] The power supply circuit has a two-circuit configuration consisting of a first power supply circuit section that dims and illuminates the first light-emitting element 39, and a second power supply circuit section that dims and illuminates the second light-emitting element 40. The first wiring connected to the output side of the first power supply circuit section and the second wiring connected to the output side of the second power supply circuit section are brought out through the wiring hole 38 to the mounting surface 33a of the circuit board 33, and the first wiring is connected to the first connector 35 and the second wiring is connected to the second connector 36.

[0026] The lamp device 10 configured in this way is installed, for example, in a socket provided in a downlight, and lights up when AC power is supplied from the socket.

[0027] When the lamp device 10 is lit, light emitted from the first light-emitting element 39 enters the Fresnel lens 42 of the translucent cover 14 and is emitted in a direction perpendicular to the front of the translucent cover 14.

[0028] The second light-emitting element 40 emits light from the front and sides. The light emitted from the second light-emitting element 40 in the lateral direction passes through the translucent cover 14 beyond the end 20a of the peripheral wall portion 20, which is the front end of the housing 11, and is emitted in the lateral direction. As a result, the light distribution has a wide spread.

[0029] Furthermore, the spread of light can be controlled by changing the ratio of the current supplying the lighting power to the first light-emitting element 39 from the power supply circuit to the current supplying the lighting power to the second light-emitting element 40. When controlling the spread of light, for example, the power supply circuit may be equipped with a wireless function and controlled by receiving wireless signals from an external source, or it may be controlled by receiving control signals from power line carrier communication, or it may be possible to switch between these methods using a DIP switch or the like.

[0030] In the lamp device 10 of this embodiment, the second light-emitting element 40, which is at least a part of the light-emitting element 34, protrudes toward the translucent cover 14 side beyond the front end of the housing 11. As a result, light from the second light-emitting element 40 is emitted toward the side of the lamp device 10, allowing for a wider spread of light.

[0031] A first light-emitting element 39 is positioned in the central area of ​​the substrate 33, and a second light-emitting element 40 is positioned along the peripheral area of ​​the substrate 33. Since the second light-emitting element 40 protrudes towards the translucent cover 14 side beyond the front edge of the housing 11, a wide light distribution can be achieved from the front to the sides of the lamp device 10. Furthermore, light from the second light-emitting element 40 can be efficiently emitted toward the sides of the lamp device 10, thereby improving the brightness on the sides of the lamp device 10.

[0032] Because the beam angle of the second light-emitting element 40 is wider than that of the first light-emitting element 39, the luminous flux of light emitted from the second light-emitting element 40 toward the side of the lamp device 10 increases, allowing for a wider spread of light.

[0033] Since the spacing between adjacent second light-emitting elements 40 is wider than the spacing between adjacent first light-emitting elements 39, the amount of light emitted by the second light-emitting elements 40 can be reduced, and the emission control of the first light-emitting elements 39, which are densely arranged, can be easily performed using Fresnel lenses 42, etc.

[0034] Furthermore, the first light-emitting element 39 positioned in the center of the substrate 33 may be an LED element having the same light distribution characteristics as the second light-emitting element 40. In this case, both the first light-emitting element 39 in the center of the substrate 33 and the second light-emitting element 40 in the peripheral area of ​​the substrate 33 protrude towards the translucent cover 14 beyond the end 20a of the peripheral wall portion 20, which is the front end of the housing 11, thereby increasing the spread of light.

[0035] Furthermore, although this embodiment shows an example of application to a flat-type lamp device 10 using a GX53 base, it can also be applied to bulb-type lamps that use light-emitting elements as the light source.

[0036] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0037] 10 Lamp device 11 cabinets 13 Light source module 14. Translucent cover 33 circuit boards 34 Light-emitting elements 39 First light-emitting element 40 Second light-emitting element

Claims

1. The enclosure and; A translucent cover is positioned to cover one side of the aforementioned housing; A light source module comprising a substrate disposed on one side of the housing, and a plurality of light-emitting elements mounted on the surface of the substrate facing the translucent cover, wherein at least a portion of the light-emitting elements protrudes toward the translucent cover side beyond the edge of one side of the housing; A lamp device characterized by comprising the following features.

2. The light source module includes, as the light-emitting element, a plurality of first light-emitting elements arranged in the central area of ​​the substrate and a plurality of second light-emitting elements arranged along the peripheral area of ​​the substrate, wherein the second light-emitting elements protrude toward the translucent cover side beyond the edge of one side of the housing. The lamp device according to feature 1.

3. The beam angle of the second light-emitting element is wider than that of the first light-emitting element. The lamp device according to feature 2.

4. The distance between adjacent second light-emitting elements is wider than the distance between adjacent first light-emitting elements. The lamp device according to claim 2 or 3.

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