TWI414723B - Lighting apparatus - Google Patents

Abstract

A lighting apparatus including a reflective lamp cover and a plurality of light modules is provided. The reflective lamp cover has a bottom and a light emitting cross-section. A portion of each light module is disposed inside the reflective lamp cover, and each light module includes a carrier and a plurality of light emitting elements. The light emitting elements are disposed on the carrier. A part of the light emitting elements is located inside the reflective lamp cover and between the bottom and the light emitting cross-section. Another part of the light emitting elements is exposed outside the reflective lamp cover.

Description

Lamp

The invention relates to a luminaire.

With the advancement of semiconductor technology, the power that light-emitting diodes (LEDs) can achieve is getting larger and larger, and the intensity of light emitted is getting higher and higher. In addition, the light-emitting diode has the advantages of power saving, long service life, environmental protection, fast startup, small size, and the like. Therefore, the light-emitting diodes are also widely used in lighting equipment, traffic signs, displays, optical mice, etc., and there is a tendency to gradually replace the traditional fluorescent lamps.

The light-emitting diode has directivity, that is, the light emitted by it is concentrated in one direction. When the light-emitting diode is used for general illumination, it is usually necessary to arrange the light-emitting diodes so that the light can be directed in different directions, so as to make the light everywhere as much as possible in the environment.

In a conventional light-emitting diode lamp, the light-emitting diodes are arranged to be rotationally symmetric with respect to a symmetry axis, and the light emitted by the light-emitting diodes is radiated in a radial direction perpendicular to the axis of symmetry. However, since the light is concentrated in the radial direction, such a light-emitting diode lamp has a problem that the illuminance is insufficient in the axial direction (the direction along the axis of symmetry). For example, when such a light-emitting diode lamp is mounted on a ceiling, the illumination below the light-emitting diode lamp is insufficient, which may be disadvantageous for the user to read or engage in other activities requiring sufficient illumination.

Another conventional light-emitting diode lamp additionally adds light-emitting diodes of other light-emitting directions to solve the above problems, and the light emitted by the light-emitting diodes of these other light-emitting directions is emitted along the axial direction. However, the light-emitting diodes with other light-emitting directions must use other circuit boards in the same direction, which may cause the internal structure of the light-emitting diode lamps to be too complicated, which is disadvantageous for heat dissipation, and the cost of the light-emitting diode lamps is increased. .

The present invention provides a luminaire that provides sufficient illumination in multiple directions simultaneously.

One embodiment of the present invention provides a light fixture that includes a reflector cover and a plurality of light modules. The reflector has a bottom and a light exit section. A part of each of the light-emitting modules is disposed in the reflector, and each of the light-emitting modules includes a carrier and a plurality of light-emitting elements. These light emitting elements are arranged on a carrier board. A portion of the illuminating elements are located within the reflector and are located between the bottom and the exit section, and another portion of the illuminating elements are exposed outside the reflector.

In one embodiment of the invention, each of the light emitting elements has an optical axis, and the optical axes of the light emitting elements are substantially parallel to the light exiting cross section.

In an embodiment of the invention, each of the light-emitting elements is, for example, a light-emitting diode.

In one embodiment of the invention, the light emitting elements of each of the light emitting modules are arranged in a direction that is substantially perpendicular to the light exiting cross section.

In one embodiment of the invention, the lighting modules are disposed about a central axis passing through the exit section.

In an embodiment of the invention, the luminaire further includes a heat sink, and a part of the heat sink is disposed in the reflector, and the light modules are disposed on the heat sink. The heat sink can have a plurality of grooves, and the light emitting modules are respectively disposed in the grooves. These grooves may extend in a direction substantially perpendicular to the light exiting cross section.

In an embodiment of the invention, the luminaire further includes a driving circuit disposed at the bottom of the reflector and located in the reflector, and the driving circuit is electrically connected to the illuminating modules. The luminaire can further include an electrical connector disposed on the bottom and outside the reflector, wherein the electrical connector is electrically connected to the driving circuit.

In an embodiment of the invention, the light fixture further includes a light-transmitting lamp cover disposed on the reflector lamp cover, wherein another portion of the light-emitting elements exposed outside the reflector lamp cover is received in the light-transmitting lamp cover. The light transmissive lamp cover can have a plurality of gas permeable openings, and the gas permeable openings extend through the light transmissive lamp cover.

In an embodiment of the invention, the reflector cover has a reflective surface that is located on the inner wall of the reflector. The light emitted by the light-emitting elements located in the reflector is reflected by the reflecting surface to the light-emitting section, and the light emitted by the portions of the light-emitting elements located in the reflector is transmitted through the light-emitting section in a direction away from the bottom. The reflecting surface is, for example, a concave surface. The reflector can have a plurality of venting openings and the venting openings extend through the reflector.

Another embodiment of the present invention provides a light fixture including the reflector lamp cover, the light emitting module, and a light-transmitting lamp cover. Each of the light emitting modules is disposed around a central axis passing through the light exiting section. The light-transmitting lamp cover is disposed on the reflector lamp cover, and the other portion of the light-emitting element exposed to the outside of the reflector lamp cover is received in the light-transmitting lamp cover.

Based on the above, in the luminaire of the embodiment of the present invention, a part of the light-emitting elements of each of the light-emitting modules are located inside the reflector, and another portion is exposed outside the reflector. Since the light emitted by the light-emitting elements located in the reflector is reflected by the reflector, and is directed away from the bottom of the reflector, and the light emitted by the light-emitting elements exposed outside the reflector is directed to the other direction, The luminaire of an embodiment of the invention can provide sufficient illumination in multiple directions simultaneously.

The above described features and advantages of the present invention will be more apparent from the following description.

1A is a perspective view of a lamp according to an embodiment of the present invention, FIG. 1B is a cross-sectional view of the lamp of FIG. 1A taken along a central axis C, FIG. 2A is an exploded view of the lamp of FIG. 1A, and FIG. 2B is a lamp of FIG. A perspective view of the light transmissive lamp cover after removal. Referring to FIG. 1A , FIG. 1B , FIG. 2A and FIG. 2B , the lamp 100 of the embodiment includes a reflector cover 110 and a plurality of illumination modules 120 . The reflector 110 has a bottom portion 112 and a light exiting section 114. A part of each of the light-emitting modules 120 is disposed in the reflector 110, and each of the light-emitting modules 120 includes a carrier 122 and a plurality of light-emitting elements 124. These light emitting elements 124 are disposed on the carrier plate 122. In this embodiment, each of the light-emitting elements 124 is, for example, a light-emitting diode, and the carrier plate 122 is, for example, a circuit board.

In the present embodiment, each of the light-emitting elements 124 has an optical axis 125, and the optical axes 125 of the light-emitting elements 124 are substantially parallel to the light-emitting section 114. Moreover, in the present embodiment, the light-emitting elements 124 of the respective light-emitting modules 120 are arranged along a direction substantially perpendicular to the light-emitting section 114. A portion of these light-emitting elements 124 (e.g., light-emitting elements 124a) are located within the reflector 110 and are positioned between the bottom portion 112 and the light exit section 114, and another portion of the light-emitting elements 124 (e.g., light-emitting elements 124b) are exposed outside of the reflector cover 110.

In the present embodiment, the light-emitting modules 120 are disposed around a central axis C passing through the light-emitting section 114. In addition, in the embodiment, the luminaire 100 further includes a heat sink 130. A portion of the heat sink 130 is disposed in the reflector 110, and the light module 120 is disposed on the heat sink 130. In the present embodiment, another portion of the heat sink 130 is exposed outside the reflector cover 110. The material of the heat sink 130 is, for example, metal or other material having a high thermal conductivity, and the heat sink 130 is adapted to conduct heat generated by the light emitting element 124. In this embodiment, the heat sink 130 can have a plurality of recesses 132, and the light emitting modules 120 are respectively disposed in the recesses 132, and the heat generated by the light emitting elements 124 can be discharged. In particular, it may be a method of bonding, snapping, screwing, or the like. Each of the grooves 132 described above may extend in a direction substantially perpendicular to the light exiting section 114.

In the embodiment, the luminaire 100 further includes a driving circuit 140 disposed at the bottom of the reflector 110 and located in the reflector 110. The driving circuit 140 is electrically connected to the light emitting modules 120 to drive the light emitting elements 124 to emit light. In the embodiment, the driving circuit 140 is, for example, a driving circuit board. The luminaire 100 can further include an electrical connector 150 disposed on the bottom portion 112 and located outside the reflector cover 110. The electrical connector 150 is electrically connected to the driving circuit 140. In this embodiment, the electrical connector 150 can be electrically connected to an external power source, for example, the electrical connector 150 is screwed into a socket (not shown).

In this embodiment, the luminaire 100 further includes a light-transmitting lamp cover 160 disposed on the reflector cover 110, wherein another portion of the light-emitting elements 124 (for example, the light-emitting elements 124b) exposed to the outside of the reflector cover 110 is housed in the light-transmitting member. In the lampshade 160. The light 127 emitted by the light-emitting elements 124 (such as the light-emitting elements 124a and 124b) (such as the light 127a emitted by the light-emitting element 124a and the light 127b emitted by the light-emitting element 124b) is transmitted to the outside through the light-transmitting cover 160.

In the present embodiment, the reflector cover 110 has a reflective surface 116 that is located on the inner wall of the reflector 110. The light 127a emitted by the light-emitting elements 124 (such as the light-emitting elements 124a) located in the reflector 110 is reflected by the reflecting surface 116 to the light-emitting section 114, and the light 127a is transmitted through the light-emitting section 114 in a direction away from the bottom 112. In the present embodiment, light 127a can then be transmitted to the outside through the top 162 of the light transmissive cover 160. In the present embodiment, the reflecting surface 116 is, for example, a concave surface to adjust the direction in which the light 127a is emitted to the outside. However, in other embodiments, the reflective surface 116 can also be a planar, convex or other shaped surface. In the present embodiment, the reflector cover 110 is made of, for example, a plastic material, and the inner wall thereof is plated or sprayed with a reflective film to form a reflective surface 116. However, in other embodiments, the reflector cover 110 can also be made of metal or other materials.

In the luminaire 100 of the present embodiment, the light 127b emitted by the illuminating element 124b can be directly emitted to the outside through the translucent cover 160, that is, radiated to the outside in a radial direction perpendicular to the central axis C. On the other hand, the light 127a emitted by the light-emitting element 124a is reflected by the reflector 110 to the light-emitting section 114, and transmitted to the light-transmitting cover 160 in a direction approximately parallel to the central axis C (ie, the axial direction), and then passed. The light cover 160 is transmitted to the outside. In this way, the light intensity provided by the luminaire 100 in the radial direction and the axial direction can be relatively close, so that when the luminaire 100 is used for general illumination purposes, the various areas in the environment can be more uniformly illuminated.

In the present embodiment, the reflector cover 110 can have a plurality of venting openings 118 and the venting openings 118 extend through the reflector 110. The venting opening 118 allows air to circulate inside and outside the luminaire 100 to enhance heat dissipation from the illuminating element 124. Moreover, in the present embodiment, the light transmissive lamp cover 160 may have a plurality of gas permeable openings 164, and the gas permeable openings 164 extend through the light transmissive lamp cover 160. The venting opening 164 also circulates air inside and outside the luminaire 100 to enhance heat dissipation from the illuminating element 124. In the present embodiment, the venting opening 164 is, for example, located at the top 162 of the translucent cover 160, that is, one end of the translucent cover 160 away from the reflector 110. Both the venting opening 118 and the venting opening 164 are, for example, elongated openings. However, in other embodiments, the venting opening 118 and the venting opening 164 may also be openings in other shapes.

In summary, in the luminaire of the embodiment of the invention, a part of the illuminating elements of each illuminating module is located in the reflector, and the other part is exposed outside the reflector. Since the light emitted by the light-emitting elements located in the reflector is reflected by the reflector, and is directed away from the bottom of the reflector (such as the axial direction), the light emitted by the light-emitting elements exposed outside the reflector is directed to the other In one direction (e.g., radial), the luminaire of an embodiment of the present invention can provide sufficient illumination in multiple directions at the same time, for example, the intensity of the light emitted from the axial direction is relatively close to the intensity of the light emitted radially.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Lamp

110. . . Reflective lampshade

112. . . bottom

114. . . Light section

116. . . Reflective surface

118, 164. . . Breathable opening

120. . . Light module

122. . . Carrier board

124, 124a, 124b‧‧‧Lighting elements

125‧‧‧ optical axis

127, 127a, 127b‧‧‧ light

130‧‧‧ Heat sink

132‧‧‧ Groove

140‧‧‧Drive circuit

150‧‧‧Electrical connector

160‧‧‧Lighting lampshade

162‧‧‧ top

C‧‧‧ center axis

1A is a perspective view of a luminaire according to an embodiment of the present invention.

1B is a cross-sectional view of the luminaire of FIG. 1A cut along a central axis C.

2A is an exploded view of the luminaire of FIG. 1A.

2B is a perspective view of the luminaire of FIG. 1A after removing the translucent lampshade.

100. . . Lamp

110. . . Reflective lampshade

112. . . bottom

114. . . Light section

116. . . Reflective surface

120. . . Light module

122. . . Carrier board

124, 124a, 124b. . . Light-emitting element

125. . . Optical axis

127, 127a, 127b. . . Light

130. . . Heat sink

132. . . Groove

140. . . Drive circuit

150. . . Electrical connector

160. . . Light-transmitting lampshade

162. . . top

164. . . Breathable opening

C. . . Central axis

Claims (19)

A luminaire includes: a reflective lamp cover having a bottom portion and a light exiting section; and a plurality of light emitting modules, wherein a part of each of the light emitting modules is disposed in the reflector lamp cover, each of the light emitting modules comprises: a carrier plate; and a plurality of a light-emitting element disposed on the carrier plate, wherein a portion of the light-emitting elements are located in the reflector cover and located between the bottom portion and the light-emitting section, and another portion of the light-emitting elements is exposed outside the reflector cover; The reflector cover has a reflecting surface located on the inner wall of the reflector, and the light emitted by the light-emitting elements located in the reflector is reflected by the reflecting surface to the light-emitting section, and is located in the reflector The light emitted by the above-mentioned portions of the light-emitting elements is transmitted in a direction away from the bottom portion through the light-emitting cross section. The luminaire of claim 1, wherein each of the illuminating elements has an optical axis, and the optical axes of the illuminating elements are substantially parallel to the light exiting cross section. The luminaire of claim 1, wherein each of the illuminating elements is a light emitting diode. The luminaire of claim 1, wherein the illuminating elements of each of the illuminating modules are arranged along a direction substantially perpendicular to the outgoing cross section. The luminaire of claim 1, wherein the luminaires The light module is disposed around a central axis passing through the light exiting section. The luminaire of claim 1, further comprising a heat sink, wherein a part of the heat sink is disposed in the reflector, and the light module is disposed on the heat sink. The luminaire of claim 6, wherein the heat sink has a plurality of grooves, and the light emitting modules are respectively disposed in the grooves. The luminaire of claim 7, wherein the grooves extend in a direction substantially perpendicular to the light exiting cross section. The luminaire of claim 1, further comprising a driving circuit disposed at the bottom of the reflector and located in the reflector, the driving circuit being electrically connected to the illuminating modules. The luminaire of claim 9, further comprising an electrical connector disposed on the bottom portion and located outside the reflector cover, wherein the electrical connector is electrically connected to the driving circuit. The luminaire of claim 1, further comprising a light-transmitting lamp cover disposed on the reflector lamp cover, wherein the other portion of the light-emitting elements exposed outside the reflector lamp cover is received in the light-transmitting lamp cover in. The luminaire of claim 11, wherein the light-transmitting lamp cover has a plurality of venting openings, and the venting openings extend through the light-transmitting lamp cover. The luminaire of claim 1, wherein the reflecting surface is a concave surface. The luminaire of claim 1, wherein the reflector cover has a plurality of venting openings, and the venting openings extend through the reverse Spotlight cover. A lamp includes: a reflector lamp cover having a bottom portion and a light exiting section; a plurality of light emitting modules, wherein a part of each of the light emitting modules is disposed in the reflector lamp cover, and each of the light emitting modules surrounds a central axis passing through the light exiting section The light-emitting module includes: a carrier plate; and a plurality of light-emitting elements disposed on the carrier plate, wherein a portion of the light-emitting elements are located in the reflector cover and located between the bottom portion and the light-emitting section, and The other part of the light-emitting elements is exposed to the outside of the reflector; and a light-transmitting cover is disposed on the reflector, wherein the other portion of the light-emitting elements exposed outside the reflector is received in the light-transmitting cover . The luminaire of claim 15, wherein each of the illuminating elements is a light emitting diode. The luminaire of claim 15 further comprising a heat sink, wherein a part of the heat sink is disposed in the reflector, and the light module is disposed on the heat sink. The luminaire of claim 17, wherein the heat sink has a plurality of grooves, and the light emitting modules are respectively disposed in the grooves. The luminaire of claim 18, wherein the grooves extend in a direction substantially perpendicular to the light exiting cross section.