TWI385347B - Light emitting diode lamp - Google Patents

Description

Light-emitting diode bulb

The invention relates to a light-emitting diode bulb, in particular to a light-emitting diode bulb with full-period illumination and active heat dissipation mechanism.

Light-emitting diodes with low power consumption, high energy conversion efficiency, long life and no mercury pollution have been applied to traffic signs, lights and street lamps, and under the trend of energy saving and carbon reduction, Polar bulbs are seen as a replacement for incandescent bulbs and fluorescent lamps, and become the mainstream of future home lighting.

In order to cater to the development of the above trends, manufacturers have developed some light-emitting diode bulbs. FIG. 1 illustrates a schematic diagram of a conventional light-emitting diode bulb 10. The light-emitting diode bulb 10 includes a planar substrate 13 , a light-emitting diode 14 disposed on the planar substrate 13 , and a heat sink 12 for providing heat dissipation of the light-emitting diode 14 for connecting an external power source and thereby providing The light-emitting diode 14 is connected to the power supply terminal 11 and the light cover 15 for isolating the light-emitting diode 14. The light-emitting diode 14 of the conventional light-emitting diode bulb 10 adopts a planar layout, and the plane layout has two kinds of defects: First, the layout of the planar layout can be utilized, that is, in a certain illumination area. In the following, the number of the LEDs 14 cannot be expanded to increase the brightness; secondly, the arrangement of the heat sink 12 of the LEDs 14 is also limited by a limited plane boundary, so that the required heat dissipation area is required. This will increase the volume of the heat sink 12, thereby increasing the weight of the LED bulb 10.

In addition, a fan (not shown) can be used in the heat dissipating device 12 to achieve better heat dissipation by forced convection. However, the art of the art is known. After the light-emitting diodes 14 of the light-emitting diode bulb 10 are integrated with the heat-dissipating device 12, they are placed together in the lamp cover 15. Since the life of the light-emitting diodes 14 is long, the light-emitting diode bulbs 10 may be due to fans (not The function is invalid and must be replaced completely, resulting in unnecessary waste. Moreover, the heat sink 12 is used for a long time, and it is easy to accumulate dust. However, the design of the light-emitting diode bulb 10 of the prior art cannot be easily cleaned, and the light-emitting diode 14 is finally reduced due to the heat dissipation efficiency of the heat sink 12. Life expectancy is reduced.

In view of the above-mentioned lack of various conventional light-emitting diode bulbs, it is necessary to propose a new and improved light-emitting diode bulb to improve the efficiency and utilization rate of the light-emitting diode bulb.

The invention provides a light-emitting diode bulb, which adopts a modular design, makes it easier to clean and can replace faults of individual modules, thereby reducing the use cost.

A light-emitting diode bulb according to an embodiment of the invention comprises a light source module and a lamp body. The light source module comprises a plurality of light emitting diodes, a column type base and a shroud. The column base includes a channel, a side surface surrounding the outer surface of the channel and a heat dissipation structure disposed in the channel, wherein the light emitting diodes are circumferentially disposed on the outer surface. The shroud is disposed at one end of the cylindrical base. The lamp body comprises a lamp housing, a fan and a connector. The lamp housing has an opening, and the socket of the shroud is sleeved in the opening. The fan is received in the lamp housing for providing the air flow, wherein the air flow cover is connected to the opening, so that the air flow enters the heat dissipation structure through the air flow cover. The connector is disposed on the lamp housing for electrically connecting an external power source, and the light emitting diode and the fan are connected thereto to obtain a corresponding driving power source. .

The recessed lamp of one embodiment of the present invention comprises one of the foregoing light-emitting diode bulbs, a female socket for fixing the light-emitting diode bulb and an external power supply for providing the light-emitting diode bulb, and one for projecting illumination. A reflector for the illumination of a diode bulb.

2 and 3, a light-emitting diode bulb 20 according to an embodiment of the invention includes a lamp body 31 and a light source module 32. The light source module 32 has a uniform column shape and is a full-circumference light source. That is, the light source module 32 emits light from the peripheral side surface 33 of the light source module 32. The design of the LED bulb 20 follows the design concept that can be replaced individually, and is designed into two modules, such as the light source module 32 and the lamp body 31. In addition, the individual modules can be replaced by faults, thereby reducing the application end. The cost of replacement. In other words, by virtue of the benefits of modular design, the consumer can replace the light source module 32 or the lamp body 31 that has been damaged or has a long life. The modular design also makes it easier to clean the user. The overall design of the LED bulb 20 is compatible with the conventional bulb, that is, the user can directly replace the conventional bulb with the LED bulb 20 disclosed in the embodiment (for example, a conventional incandescent bulb or a power saving fluorescent bulb, etc.) ), thereby lowering the threshold of substitution and increasing the market share of the light-emitting diode bulb 20.

Referring to FIG. 4 , the light source module 32 includes a shroud 41 , a column base 42 , a plurality of LED plates 43 , and a lamp cover 44 . The lamp cover 44 can be transparent, which is used to isolate the internal components of the protection light source module 32, and has a convection hole 21 for heat dissipation convection on the top. The shroud 41 is disposed at one end 423 of the column base 42, and one end of the shroud 41 is provided with a set of joints 411, and At the other end, an air outlet 412 is provided. The air outlet 412 is received by the column base 42 and has a corresponding cross-sectional shape. In the embodiment of the present invention, the column base 42 has a hexagonal cross-sectional shape, and the cross-sectional shape of the air outlet 412 is also It is hexagonal. The shroud 41 is a guide for providing a heat-dissipating airflow, and has a tapered structure. After the airflow enters from the opening 413 of the socket portion 411, the airflow is introduced into the cylindrical base 42 from the air outlet 412 via a tapered structure. The cross-sectional shape of the opening 413 and the air outlet 412 of the socket portion 411 may be different. As shown in the embodiment of the present invention, the cross-sectional shape of the air outlet 412 is hexagonal, and the opening 413 of the socket portion 411 is substantially close to a circle. .

Referring to FIG. 4, FIG. 6 and FIG. 7, the column base 42 is a columnar body, and comprises a function of providing support for the light-emitting diode lamp plate 43 and heat dissipation, etc. The column-shaped base 42 has an outer surface 421 and emits light. The diode lamp plate 43 is circumferentially disposed on the outer side surface 421 to obtain a fixed support for the light-emitting diode lamp plate 43. In the embodiment of the present invention, the outer surface 421 is composed of six rectangular surfaces 4211, and each of the light-emitting diode lamps 43 is disposed on the corresponding rectangular surface 4211.

Referring to FIG. 4, the inside of the column base 42 is provided with a through passage 422 in the axial direction (shown by arrow 45 in FIG. 4), and the airflow derived from the air outlet 412 flows into the passage 422, and the passage 422 and The combination of the airflow into the channel 422 and the like allows the light-emitting diode lamp panel 43 to obtain good heat dissipation. Referring to FIG. 4 and FIG. 6, a heat dissipation structure 425 can be disposed inside the channel 422. The heat dissipation structure 425 can be used to increase the heat dissipation area of the light-emitting diode lamp plate 43 and the airflow is introduced into the channel to force convection. The heat conduction structure 425 is thermally conducted, so that the light-emitting diodes on the light-emitting diode board 43 can be ensured at the designed working temperature. Light, to maintain its longevity and stable performance, can also use the high-efficiency light-emitting diode 431 or increase the number of light-emitting diodes 431 to improve the illumination per unit area of the light-emitting diode bulb . The heat dissipation structure 425 can include a plurality of fins 4251. In the embodiment of the present invention, each of the fins 4251 extends substantially in a radial direction from the inner surface 424 of the column base 42 , and the long sides of the fins 4251 are shorter than the length of the column base 42 , so that the column base A margin d is left between the edge of the end portion 423 of the 42 and the fin 4251, and the edge of the air outlet 412 of the shroud 41 is accommodated within the margin d, thereby efficiently introducing the convection gas. The heat dissipation structure 425 achieves a better heat dissipation effect.

FIG. 7 illustrates a perspective view of a fin heat dissipation unit 70 according to an embodiment of the present invention. Referring to Figures 6 and 7, the column base 42 can be fabricated by integral molding, such as an aluminum extrusion process; or as shown in the embodiment of Figure 7, a plurality of fin heat dissipation units 70 are combined. The fin heat dissipation unit 70 includes a substrate 71 and a plurality of fins 4251. The fins 4251 and the substrate 71 may be elongated, and after being combined, a straight-type convection passage may be formed inside, so that the convective wind resistance can be greatly reduced. The lengths of the fins 4251 are equivalent, but the widths may be equal or not the same. The length of the fins 4251 is shorter than the substrate 71, so that when the fins 4251 are fixed to the substrate 71 with one long side thereof, there is still a margin d . The short side of the fin 4251 faces the combined axis of the fin heat sink unit 70. The area and number of fins 4251 are determined by the required heat dissipation area and the heat dissipation effect under forced convection. The fins 4251 may not be in contact with each other to avoid convection obstruction. After the fin heat dissipating units 70 are completed, the long sides of the two adjacent fin heat dissipating units 70 are joined to form a columnar base 42. The manufacturing method of the substrate 71 and the fins 4251 includes a wire cutting process, and the fins The bonding between the 4251 and the substrate 71 or between the fin heat dissipating units 70 can be performed by a soldering process. The cylindrical base 42 made and combined by wire cutting has the advantages of light weight and simple process.

Referring to FIG. 4, the LED board 43 includes a plurality of LEDs 431 arranged along the longitudinal axis of the post base 42 (shown by arrow 45 in FIG. 4). The light-emitting diode lamp plate 43 is attached to the outer surface 421 of the column-shaped base 42 so that the heat generated by the light-emitting diode 431 can be dissipated by the heat dissipation structure 425 of the column-shaped base 42. By using the columnar base 42 and arranging the light emitting diodes 431 along the longitudinal axis of the column base 42, the number of light emitting diodes can be arbitrarily increased by the light emitting diode bulb to enhance the brightness of the light emitting diode bulb.

Fig. 5 is a perspective exploded view showing a lamp body 31 according to an embodiment of the present invention. Referring to FIG. 4 and FIG. 5, the lamp body 31 includes a connector 51, a lamp housing 52, a power module 53 and a fan assembly 54, wherein the fan assembly 54 includes a fan 542 for providing a heat dissipation airflow and surrounds the fan 542. Outside block 541. The connector 51 is disposed on the lamp housing 52. The connector 51 is inserted into the female socket of the lamp, thereby being electrically connected to an external power source to provide power required for driving the LED 431 and the fan 542. The type of the joint 51 conforms to standards used in the industry, such as E26 or E27, to facilitate compatibility with conventional lamps.

The lamp housing 52 has a receiving space 521, and the power module 53 and the fan 542 are received therein. The power module 53 is electrically connected to the connector 51, and converts the AC power provided by the connector 51 into a DC power source required for the LED and the fan 542. The outer frame 541 is provided with a positive electrode 543a and a negative electrode 543b, and the power module 53 is electrically connected to the positive electrode 543a and the negative electrode 543b. The inner edge of the sleeve portion 411 of the shroud 41 is also provided with the positive electrode 543a. a contact point (not shown) corresponding to the negative electrode 543b, and the light-emitting diode lamp plate 43 is electrically connected to the positive electrode 543a and the negative electrode 543b by the contact, and is obtained from the power module 53. Required drive power.

The outer frame 541 can be integrated with the fan 542, and the two can also be separately provided; the outer frame 541 can also be integrated with the lamp housing 52. The outer frame 541 is joined to the opening 522 of the lamp housing 52, and the sleeve portion 411 of the air guiding cover 41 is sleeved on the outer frame 541 to engage the light source module 32 with the lamp body 31, and the means for fitting is included. The inner surface of the outer surface 544 of the frame 541 and the inner surface of the sleeve portion 411 are respectively provided with corresponding inner and outer mating threads; or the outer diameter of the outer frame 541 and the inner diameter of the sleeve portion 411 are tightly fitted with force release. Or the outer surface 544 of the outer frame 541 and the inner surface of the fitting portion 411 are respectively provided with corresponding concave-convex fitting structures. In the embodiment, the outer surface 544 of the outer frame 541 is provided with a convex fitting portion 545, and the inner surface of the sleeve portion 411 is provided with a corresponding concave fitting portion (not shown). The light source module 32 and the lamp body 31 are connected by the easy-to-remove combination method, so that the light source module 32 and the lamp body 31 can be easily replaced, and the replacement cost can be reduced. The user can easily clean the dust caused by the fan. Extend the life of the LED bulb.

FIG. 8 illustrates a perspective view of a downlight 80 in accordance with an embodiment of the present invention. Referring to FIG. 5 and FIG. 8 , the recessed lamp 80 includes the foregoing light-emitting diode bulb 20 , a female socket 81 for fixing the LED bulb 20 and electrically connecting the external power source of the LED bulb 20 , and A reflector 82 for projecting the illumination of the LED bulb 20, wherein the connector 51 of the LED bulb 20 is received in the female socket 81.

In summary, a light-emitting diode is disposed on a surface of a columnar body to form A three-dimensional arrangement can solve the limitations of the layout. The length of the cylindrical shell can be arbitrarily extended, that is, the number of arrangement of the light-emitting diodes can be increased, so that the brightness of the projected unit area can be effectively improved. A heat dissipation structure is disposed in the cylindrical casing, and the airflow through the heat dissipation structure is utilized to optimize heat dissipation efficiency. The modular design of the light-emitting part and the lamp body makes cleaning and fault replacement easy, thereby reducing the cost of use.

The technical and technical features of the present invention have been disclosed as above, and those skilled in the art can still make various substitutions and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should be construed as being limited by the scope of the appended claims

10‧‧‧Lighting diode bulb

11‧‧‧Connector

12‧‧‧ Heat sink

13‧‧‧Flat substrate

14‧‧‧Lighting diode

15‧‧‧shade

20‧‧‧Lighting diode bulb

21‧‧‧ convection hole

31‧‧‧Light body

32‧‧‧Light source module

33‧‧‧Week side surface

41‧‧‧Shroud

42‧‧‧ column base

43‧‧‧Lighting diode board

44‧‧‧shade

45‧‧‧ arrow

51‧‧‧Connectors

52‧‧‧Light shell

53‧‧‧Power Module

54‧‧‧fan combination

70‧‧‧Fin Heat Dissipation Unit

71‧‧‧Substrate

80‧‧‧ recessed light

81‧‧‧Female socket

82‧‧‧reflector

411‧‧‧ Sockets

412‧‧‧air outlet

413‧‧‧ openings

421‧‧‧ outside surface

422‧‧‧ channel

423‧‧‧ End

424‧‧‧ inside surface

425‧‧‧heat dissipation structure

431‧‧‧Lighting diode

521‧‧‧ accommodating space

522‧‧‧ openings

541‧‧‧Front frame

542‧‧‧Fan

543a‧‧‧ positive electrode

543b‧‧‧negative electrode

544‧‧‧ outside surface

545‧‧‧ convex fittings

4211‧‧‧Rectangular surface

4251‧‧‧Fins

1 is a schematic view of a conventional light-emitting diode bulb; FIG. 2 is a perspective view of a light-emitting diode bulb according to an embodiment of the present invention; FIG. 3 is a perspective view of a light-emitting diode bulb according to an embodiment of the present invention; FIG. 4 is a perspective exploded view of a light source module according to an embodiment of the present invention; FIG. 5 is a perspective exploded view of a lamp body according to an embodiment of the present invention; and FIG. 6 illustrates a column type base of an embodiment of the present invention. FIG. 7 is a perspective view showing a fin heat dissipating unit according to an embodiment of the present invention; and FIG. 8 is a perspective view showing a recessed lamp according to an embodiment of the present invention.

20‧‧‧Lighting diode bulb

21‧‧‧ convection hole

31‧‧‧Light body

32‧‧‧Light source module

33‧‧‧Week side surface

Claims (18)

A light-emitting diode bulb comprises: a light source module comprising: a plurality of light-emitting diodes; a column-type base comprising a channel, one side of the outer surface surrounding the channel and one of the heat dissipation holes disposed in the channel a structure, wherein the light emitting diodes are circumferentially disposed on the outer side surface; and a shroud disposed at one end of the column base, the shroud having a tapered structure; and a lamp body comprising: a lamp housing having an opening; a fan received in the lamp housing for providing an air flow, wherein the air flow cover is coupled to the opening to allow airflow to enter the heat dissipation structure through the air flow cover; The connector is disposed on the lamp housing for electrically connecting to an external power source, and the light emitting diode and the fan are connected thereto to obtain a corresponding driving power source. The light-emitting diode bulb of claim 1, wherein the airflow shroud further comprises a set of contacts, the opening of the lamp housing being sleeved to the socket. The light-emitting diode bulb of claim 1, wherein the heat dissipation structure comprises a plurality of fins, and the heat dissipation structure is formed by an aluminum extrusion process, or the heat dissipation structure comprises a plurality of heat dissipation units, each heat dissipation unit comprising a substrate and A plurality of fins, and the method of fabricating the substrate and the fin includes a wire cutting process. The light-emitting diode bulb of claim 1, wherein the light source module and the lamp body comprise a set of connecting means, and the socket means comprises a corresponding inner External fit thread, tight fit for detachable force and corresponding concave and convex fitting structure. The light-emitting diode bulb of claim 1, further comprising a power module housed in the lamp housing, the power module converting the external power source into the driving power source. The light-emitting diode bulb of claim 1, further comprising a frame and a pair of electrodes disposed on the opening of the lamp housing, the outer frame being sleeved at one end of the column case, the electrodes being disposed outside the electrode The light-emitting diodes obtain the corresponding driving power source by the electrodes. A light-emitting diode bulb according to claim 6, wherein the outer frame is integrated with the lamp housing. The light-emitting diode bulb of claim 1, wherein the plurality of light-emitting diodes are arranged along an axial direction of the column base. The light-emitting diode bulb of claim 1, further comprising a lamp cover for isolating protection, and the lamp cover has a pair of flow holes at the top. A recessed lamp comprising: one of the light-emitting diode bulbs according to claim 1; a female socket for fixing the light-emitting diode bulb and providing an external power supply connection of the light-emitting diode bulb; and a reflection A cover for projecting the illumination of the light-emitting diode bulb. The recessed lamp of claim 10, wherein the shroud further comprises a set of contacts, the opening of the lamp housing being sleeved to the socket. The recessed lamp of claim 10, wherein the heat dissipation structure comprises a plurality of fins and the heat dissipation structure is formed by an aluminum extrusion process, or the heat dissipation structure comprises a plurality of heat dissipation units, each heat dissipation unit comprising a substrate and a plurality of fins The method for fabricating the substrate and the fin includes a wire cutting process. According to the recessed lamp of claim 10, the light source module and the lamp body comprise a set of connecting means, and the socket means comprises a corresponding inner and outer mating thread, a tight fit and a corresponding force release Concave convex structure. According to the recessed lamp of claim 10, the light module further includes a power module housed in the lamp housing, and the power module converts the external power source into the driving power source. The recessed lamp of claim 10, further comprising a frame and a pair of electrodes disposed on the opening of the lamp housing, the outer frame being sleeved at one end of the cylindrical case, the electrodes being disposed on the outer frame, The equivalent light-emitting diode obtains the corresponding driving power source by the electrodes. According to the recessed lamp of claim 15, wherein the outer frame is integrated with the lamp housing. The recessed light of claim 10, wherein the plurality of light emitting diodes are arranged along an axial direction of the cylindrical base. According to the recessed lamp of claim 10, the lamp cover further comprises a lamp cover for isolating protection, and the lamp cover has a pair of flow holes at the top.