TWI386592B - Led fluorescent lamp - Google Patents

Description

LED fluorescent light

The invention relates to a fluorescent lamp, in particular to an LED fluorescent lamp.

Compared with traditional light sources, light-emitting diodes (LEDs) have high luminous efficiency, low radiation, low power consumption, long life, low driving voltage, fast start-up, environmental protection, anti-vibration and compression, and miniaturization of lamps. Lighting devices using LEDs as fluorescent light sources are currently widely used to replace gas fluorescent fluorescent lamps.

The existing LED fluorescent lamp usually consists of a cylindrical transparent lamp tube and an LED light source substrate mounted in the lamp tube. In order to increase the illumination angle and scattering uniformity of the LED fluorescent lamp, a plurality of rows of light-emitting diodes (LEDs) are mounted on the LED light source substrate, and diffusion particles are added to the material of the lamp cover to increase the light-scattering property of the lamp cover. This kind of LED fluorescent lamp mainly provides uniform light with large illumination angle, and is not suitable for certain key lighting or local lighting conditions, such as the case where the wall of the exhibit in the exhibition hall needs special illumination.

In view of this, the present invention provides an LED fluorescent lamp that provides partial accent lighting.

An LED fluorescent lamp includes a base and a lamp cover and a light source substrate fixed on the base, and the light source substrate is mounted with a plurality of light emitting diodes. A concentrating inner cover is further disposed between the lamp cover and the light source substrate, the illuminating diode is disposed at a bottom of the concentrating inner cover, the concentrating inner cover includes a reflective concentrating surface, and the lamp cover includes the plurality of illuminating diodes A body-facing condenser lens. The reflective concentrating surface is configured to reflect incident light from the plurality of illuminating diodes onto the concentrating lens, the concentrating lens for maintaining a light exiting direction through the concentrating lens at a predetermined time Within the scope.

An LED fluorescent lamp comprises a base, a lamp cover fixed to the base and a light source substrate, a power connector mounted on the base and the end of the lamp cover, and the light source substrate is mounted with a plurality of light emitting diodes. A concentrating inner cover is further disposed between the lamp cover and the light source substrate, and the illuminating diode is disposed at a bottom of the concentrating inner cover, the concentrating inner cover further comprising a reflective concentrating surface for illuminating the illuminating surface Light on the reflective concentrating surface is reflected to a particular area on the hood.

An LED fluorescent lamp comprises a base, a lamp cover fixed to the base and a light source substrate, a power connector mounted on the base and the end of the lamp cover, wherein the light source substrate is mounted with a plurality of light emitting diodes, wherein the lamp cover is A condensing lens is disposed in a light-emitting direction of the corresponding light-emitting diode, and the condensing lens is configured to maintain a light-emitting direction passing through the condensing lens within a predetermined range.

The LED fluorescent lamp with the concentrating inner cover and the concentrating lens double concentrating mode, the light emitted by the illuminating diode is reflected by the concentrating inner cover to form a light beam with a small light scattering angle and strong directivity. Then, the beam passes through the collecting lens again, and the collecting lens re-converges the light, the light scattering angle is further reduced, and the directivity is enhanced to form a high-directional and high-brightness beam, which provides an important illumination for a specific area.

The LED fluorescent lamp with a single concentrating mode of the concentrating inner cover, the light emitted by the illuminating diode is reflected by the concentrating inner cover to form a light beam with a small light scattering angle and strong directivity, which can provide a relatively large range. Partial illumination is performed on specific areas.

In the LED fluorescent lamp with a single collecting mode of the collecting lens, a part of the light emitted by the light emitting diode passes through the collecting lens, the collecting lens will converge the light, and the other part of the light directly passes through the lamp cover to illuminate the outside. Not only can the global illumination conditions with a large light scattering angle be provided, but also the convergence effect of the concentrating lens on the light can be focused on a specific area within the illumination range.

Referring to FIG. 1 , a first embodiment of the present invention, an LED fluorescent lamp 100 includes a heat dissipation base 10 , a lamp cover 20 , and a power connector 30 . The lamp cover 20 is fixed to the heat dissipation base 10 to form a substantially elongated tubular structure. The power connector 30 is disposed at both ends of the circular tubular structure formed by the heat sink base 10 and the lamp cover 20, and the power connector 30 is used to establish an electrical connection with a power source (not shown).

Please refer to FIG. 2, which is a cross-sectional view of the LED fluorescent lamp of FIG. 1 along the IV-IV direction. The LED fluorescent lamp 100 further includes a light source substrate 40 fixed to the heat dissipation base 10, and the light source substrate 40 is electrically connected to the power connector 30. The light source substrate 40 is provided with a light-emitting diode 41. The light-emitting diode 41 can select a straw-hat type light-emitting diode having a large irradiation angle, a high-power light-emitting diode, or a color light-emitting diode, etc., as needed. kind.

The heat dissipation base 10 can be manufactured by using an aluminum alloy substrate with better heat dissipation. The bottom of the heat dissipation base 10 is provided with a plurality of heat dissipation fins 11 spaced apart from each other, and the heat dissipation fins 11 are used to increase the heat dissipation base 10 . Surface area to speed up air circulation and heat dissipation. A recess 12 is formed on the heat dissipation base 10, and the recess 12 is disposed on the heat dissipation base 10 opposite to the heat dissipation fins 11. The light source substrate 40 is disposed in the recess 12. The light source substrate 40 and the heat dissipation base 10 are adhered by a high thermal conductivity thermal conductive tape, and the heat conduction tape can better conduct the heat generated by the light source substrate 40 to the heat dissipation base 10, and then through the heat dissipation fins 11 and the air. Heat exchange. The light source substrate 40 can also be fixed to the heat dissipation base 10 by screws or other means, and a heat conduction plate is disposed between the light source substrate 40 and the heat dissipation base 10 for conducting heat generated by the light source substrate 40 to the heat dissipation base. Block 10.

3 is a schematic cross-sectional view of the lampshade 20 in the first embodiment of the present invention. The lampshade 20 is a circular arc-shaped lamp cover, and includes a concentrating inner cover 21 and an outer lamp cover 22. The arcuate edge of the outer lamp cover 22 is further provided with a flange 23. The heat dissipation base 10 further includes a buckle portion 13 that is engaged with the flange 23 at the edge of the lamp cover 20 to fix the lamp cover 20 to the heat dissipation base 10. The globe 20 is disposed directly above the light source substrate 40, and the light emitted from the light-emitting diodes 41 on the light source substrate 40 is transmitted to the outside through the globe 20.

The lampshade 20 is made of a transparent material, and specifically, one or a mixture of polymethyl methacrylate, polycarbonate, polystyrene, styrene-methyl methacrylate copolymer may be used. In the present embodiment, the lamp cover 20 is manufactured by an integral molding method. The concentrating inner cover 21 is disposed between the outer lamp cover 22 and the light source substrate 40, and the illuminating diode 41 is disposed at the bottom of the concentrating inner cover 21. The cross section of the concentrating inner cover 21 is parabolic or near parabolic, and the surface of the concentrating inner cover 21 is coated with a reflective layer 24 to form a reflective concentrating surface, and the light emitted by the illuminating diode 41 is reflected by the reflective concentrating surface. The light scattering angle converges, and the light exiting direction is adjusted to the parabolic opening direction of the cross section of the concentrating inner cover 21.

The outer lamp cover 22 includes a collecting lens 25 opposite to the light emitting diode 41. The light reflected by the collecting surface passes through the collecting lens 25, and the collecting lens 25 again converges the light to pass through the collecting lens. The light exiting direction on 25 remains within a predetermined range. The lamp cover 20 is made of a transparent material, and the condensing lens 25 can be formed by changing the thickness of the outer lamp cover 22.

Referring to FIG. 4, the light emitted from the light-emitting diode 41 is irradiated onto the concentrating inner cover 21, and the reflected condensed light converges toward the light, and reflects the incident light from the plurality of light-emitting diodes 41 to the condensed light. On the lens 25, the condensing lens 25 re-energizes the light to maintain the light exiting direction of the condensing lens 25 within a predetermined range. The light emitted by the light-emitting diode 41 converges twice to form a beam of high directivity and high brightness, providing an important illumination for a specific area.

Please refer to FIG. 5, which is a cross-sectional view of the LED fluorescent lamp 102 in the second embodiment of the present invention. In the present embodiment, the LED fluorescent lamp 102 is similar in structure to the first embodiment, except that the concentrating inner cover 212 and the outer lamp cover 222 are two separate components, and the concentrating inner cover 212 is disposed inside the outer lamp cover 222. Between the outer lamp cover 222 and the light source substrate 402, the cross section of the concentrating inner cover 212 is parabolic or near parabolic. The concentrating inner cover 212 may be made of a white high reflectivity plastic material, or a reflective concentrating surface may be formed by coating a reflective layer on the surface of the substrate. The light emitting diode 412 is disposed at the bottom of the light collecting inner cover 212, and the outer light cover 222 includes a collecting lens 252 opposite to the plurality of light emitting diodes 412. The light emitted by the light-emitting diode 412 passes through the reflection of the reflective concentrating surface and the convergence of the condensing lens 252 to form a light beam having a small light scattering angle and a strong directivity.

Please refer to FIG. 6, which is a schematic cross-sectional view of an LED fluorescent lamp 103 in a third embodiment of the present invention. In the present embodiment, the LED fluorescent lamp 103 uses only the concentrating inner cover 213 in a concentrating manner. The outer lamp cover 223 and the concentrating inner cover 213 are manufactured by an integral molding method. The concentrating inner cover 213 is disposed between the outer lamp cover 223 and the light source substrate 403. The cross section of the concentrating inner cover 213 is parabolic or near parabolic. The surface of the concentrating inner cover 213 is coated with a reflective layer 243 to form a reflective concentrating surface. . The light-emitting diode 413 is disposed at the bottom of the concentrating inner cover 213, and the light emitted by the light-emitting diode 413 is reflected by the reflective concentrating surface, and the light-emitting direction thereof is in the direction of the parabolic opening of the cross-section of the concentrating inner cover 213, and then the light beam passes through. The outer lamp cover 223 illuminates the outside world. Therefore, the concentrating inner cover 213 can adjust the light emitted by the light-emitting diode 413 to a specific light-emitting direction, that is, by changing the direction of the parabolic opening, the reflective concentrating surface can reflect the light irradiated onto the reflective concentrating surface to the outside. A particular area on the shade 223 is then illuminated through the outer cover 223.

Please refer to FIG. 7, which is a schematic cross-sectional view of an LED fluorescent lamp 104 in a fourth embodiment of the present invention. In the present embodiment, the LED fluorescent lamp 104 uses only a collecting lens 254 in a concentrating manner. The outer cover 224 is provided with a collecting lens 254 at a position in the light emitting direction of the light emitting diode 414 facing the light source substrate 404. A part of the light emitted by the light emitting diode 414 passes through the collecting lens 254, and the collecting lens 254 generates light. The convergence causes the light exiting direction through the collecting lens 254 to remain within a predetermined range, and the other portion of the light directly illuminates the outside through the outer cover 224. In the present embodiment, the LED fluorescent lamp 104 can not only provide global illumination conditions with a large light scattering angle, but also utilize the focusing effect of the collecting lens 254 on the light to focus illumination on a specific area within the illumination range.

Please refer to FIG. 8, which is a schematic cross-sectional view of an LED fluorescent lamp 105 in a fifth embodiment of the present invention. In the present embodiment, the LED fluorescent lamp 105 uses a lower power LED 415. The luminous efficiency of the LED is low, and the LED fluorescent lamp does not require a heat sink for heat dissipation. The reflector 205 is integrally formed, and the reflector 205 includes a concentrating inner cover 215. The concentrating inner cover 215 is formed with a receiving portion 265. The light source substrate 405 is mounted in the accommodating portion 265, and the concentrating inner cover 215 is horizontal. The profile of the cross section is a parabola or a near parabola, and the surface of the concentrating inner cover 215 is coated with a reflective layer to form a reflective concentrating surface. A condensing lens 255 is disposed at an opening position of the concentrating inner cover 215. The condensing lens 255 can be fixed to the concentrating inner cover 215 by being stuck or glued.

Please refer to FIG. 9, which is a cross-sectional view of an LED fluorescent lamp 106 in a sixth embodiment of the present invention. In the present embodiment, the LED fluorescent lamp 106 uses a higher power LED 416. The luminous efficiency of the LED is high, and the LED fluorescent lamp 106 has a higher requirement for the heat dissipation structure. The heat dissipation base 160 is integrally formed. The bottom of the heat dissipation base 160 is provided with a heat dissipation fin 116. The heat dissipation base 160 is further formed with a concave portion 126. The concave portion 126 is disposed opposite to the heat dissipation fin 116 on the heat dissipation base 160. The light source substrate 406 is disposed in the recess 126. The heat dissipation base 160 further includes a reflective concentrating cover 206 disposed above the light source substrate 406, and the reflective concentrating cover 206 is parabolic or near parabolic in cross section. The surface of the reflective concentrating cover 206 is coated with a reflective layer to form a reflective concentrating surface, and the back surface of the reflective concentrating cover 206 is also provided with a heat dissipating fin 116. The opening position of the reflective concentrating cover 206 is further provided with a condensing lens 256, and the condensing lens 256 can be fixed to the reflective concentrating cover 206 by means of snapping and adhesive bonding.

It is to be understood by those skilled in the art that the above embodiments are only intended to illustrate the invention, and are not intended to limit the invention, as long as it is within the spirit of the invention Changes and modifications are intended to fall within the scope of the invention.

100, 102, 103, 104, 105, 106‧‧‧ LED fluorescent lamps

10, 160‧‧‧ Thermal base

11, 116‧‧‧ heat sink fins

12. 126‧‧‧ recess

13‧‧‧Snap Department

20‧‧‧shade

205‧‧‧Reflection lampshade

206‧‧‧Reflecting concentrator

21, 212, 213, 215‧‧ ‧ concentrating inner cover

22, 222, 223, 224‧‧‧ outer lampshade

23‧‧‧Front

24, 243‧‧‧reflective layer

25, 252, 254, 255, 256‧‧ ‧ condenser lens

265‧‧‧ 容部

40, 402, 403, 404, 405, 406‧‧‧ light source substrate

41, 412, 413, 414, 415, 416‧‧ ‧Lighting diodes

1 is a schematic view of an LED fluorescent lamp according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of the LED fluorescent lamp of Figure 1 taken along the IV-IV direction.

3 is a schematic cross-sectional view of a lamp cover in the LED fluorescent lamp of FIG. 1.

4 is a schematic view of the optical path of the cross section of the LED fluorescent lamp of FIG. 1 along the IV-IV direction.

Fig. 5 is a schematic cross-sectional view showing an LED fluorescent lamp in a second embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view showing an LED fluorescent lamp in a third embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view showing an LED fluorescent lamp in a fourth embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view showing an LED fluorescent lamp in a fifth embodiment of the present invention.

9 is a schematic cross-sectional view of an LED fluorescent lamp in a sixth embodiment of the present invention.

10‧‧‧ Thermal base

20‧‧‧shade

21‧‧‧Spotlight inner cover

22‧‧‧Outer lampshade

24‧‧‧reflective layer

25‧‧‧ Concentrating lens

40‧‧‧Light source substrate

41‧‧‧Lighting diode

Claims (10)

An LED fluorescent lamp includes a base and a lamp cover and a light source substrate fixed on the base, and the light source substrate is mounted with a plurality of light emitting diodes. The improvement is that a light collecting inner cover is further disposed between the light cover and the light source substrate. The illuminating diode is disposed at a bottom of the concentrating inner cover, the concentrating inner cover includes a reflective concentrating surface, and the lamp cover includes a concentrating lens opposite to the plurality of illuminating diodes, the reflective concentrating surface For reflecting incident light from the plurality of light emitting diodes onto the collecting lens, the collecting lens is for maintaining a light exiting direction through the collecting lens within a predetermined range. The LED fluorescent lamp of claim 1, wherein the concentrating inner cover and the lamp cover are integrally formed. The LED fluorescent lamp of claim 1, wherein the reflective concentrating surface is coated with a reflective layer. The LED fluorescent lamp of claim 1, wherein the base comprises a buckle portion, and the edge of the lamp cover is provided with a convex edge, and the buckle portion is engaged with the convex edge of the edge of the lamp cover to fix the lamp cover to the base On the seat. The LED fluorescent lamp of claim 1, wherein the base further comprises a plurality of spaced fins. The LED fluorescent lamp of claim 1, wherein the base is formed with a recess, and the light source substrate is disposed in the recess. An LED fluorescent lamp includes a base, a lamp cover and a light source substrate fixed on the base, and a power connector mounted on the base and the end of the lamp cover. The light source substrate is mounted with a plurality of light emitting diodes, and the improvement is that A concentrating inner cover is further disposed between the lamp cover and the light source substrate, and the illuminating diode is disposed at a bottom of the concentrating inner cover, the concentrating inner cover further comprising a reflective concentrating surface for illuminating the illuminating surface Light on the reflective concentrating surface is reflected to a particular area on the hood. The LED fluorescent lamp of claim 7, wherein the concentrating inner cover and the lamp cover are integrally formed. The LED fluorescent lamp of claim 7, wherein the reflective concentrating surface is coated with a reflective layer. An LED fluorescent lamp includes a base, a lamp cover and a light source substrate fixed on the base, and a power connector mounted on the base and the end of the lamp cover. The light source substrate is mounted with a plurality of light emitting diodes, and the improvement is that The lamp cover is provided with a collecting lens in a light emitting direction of the corresponding light emitting diode, and the collecting lens is configured to maintain a light emitting direction passing through the collecting lens within a predetermined range.