Lamp

Abstract

The application relates to the lighting technical field and discloses a lamp, which comprises a light source module, a light-transmitting cover and a light guiding module. The light source module has an outlight surface, the lighting light rays emitted by the light source module comprise first sub-beams and second sub-beams, and the first sub-beams and the second sub-beams are respectively located on two sides of the outlight normal of the outlight surface. The light-transmitting cover comprises a first light-transmitting part and a second light-transmitting part, and the distance between the first light-transmitting part and the light source module is greater than the distance between the second light-transmitting part and the light source module. The light guiding module is arranged between the light source module and the light-transmitting cover and is used for guiding the lighting light rays to the light-transmitting cover; the emission angle of the first sub-beams emitted via the light guiding module is smaller than the emission angle of the second sub-beams emitted via the light guiding module. In the application, the illumination brightness of different light-transmitting areas of the light-transmitting cover can be substantially equal under the action of the light guiding module, so that the overall illumination brightness of the light-transmitting cover can be more uniform, and the lamp has a better lighting effect.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and more specifically, to a luminaire. Background Technology

[0002] In existing lighting fixtures (such as wall lamps and wall washer lamps), in order to make the overall structure of the fixture more compact, the internal light-transmitting cover (such as a milky white semi-transparent cover) usually adopts an irregular surface design. This may result in inconsistent distances between the lamp beads inside the fixture and different areas on the light-transmitting cover.

[0003] Specifically, the area of ​​the light-transmitting cover closer to the LED beads has higher illumination brightness, while the area of ​​the light-transmitting cover farther from the LED beads has lower illumination brightness. This results in uneven illumination of the light emitted from the light-transmitting cover, which in turn affects the lighting effect of the lamp. Summary of the Invention

[0004] This application provides a lamp, which includes a light source module, a light-transmitting cover, and a light-guiding module. The light source module emits illumination light and has a light-emitting surface. The illumination light includes a first sub-beam and a second sub-beam, which are located on opposite sides of the light-emitting normal of the light-emitting surface. The light-transmitting cover is spaced apart from the light-emitting surface and includes a first light-transmitting portion and a second light-transmitting portion, which are located on opposite sides of the light-emitting normal. The distance between the first light-transmitting portion and the light source module is greater than the distance between the second light-transmitting portion and the light source module. The light-guiding module is disposed between the light source module and the light-transmitting cover, and is located on the optical path of the illumination light, for guiding the illumination light to the light-transmitting cover. The first sub-beam is guided to the first light-transmitting portion via the light-guiding module, and the second sub-beam is guided to the second light-transmitting portion via the light-guiding module. The emission angle of the first sub-beam emitted via the light-guiding module is smaller than the emission angle of the second sub-beam emitted via the light-guiding module.

[0005] In the lighting fixture provided in this application embodiment, a light guiding module is provided in the optical path of the illumination light between the light source module and the light-transmitting cover. In one aspect, the light guiding module is used to guide the first sub-beam to the first light-transmitting part and the second sub-beam to the second light-transmitting part, thereby redistributing the illumination light and improving the energy utilization efficiency of the illumination light.

[0006] On the other hand, the light guiding module can also adjust the exit angles of the first sub-beam and the second sub-beam. Specifically, the exit angle of the first sub-beam emitted through the light guiding module is smaller than the exit angle of the second sub-beam emitted through the light guiding module. Since the distance between the first light-transmitting part and the light source module is greater than the distance between the second light-transmitting part and the light source module, when the exit angle of the first sub-beam is relatively small, the energy of the first sub-beam incident on the first light-transmitting part can be relatively concentrated to improve the illumination brightness of the first light-transmitting part; while when the exit angle of the second sub-beam is relatively large, the energy of the second sub-beam incident on the second light-transmitting part can be relatively dispersed to reduce the illumination brightness of the second light-transmitting part.

[0007] Therefore, in the embodiments of this application, under the action of the light guiding module, the illumination brightness of different light-transmitting areas of the light-transmitting cover can be approximately equal, so that the overall illumination brightness of the light-transmitting cover can be more uniform, ensuring that the lamp has a better lighting effect. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a cross-sectional view of the lamp provided in the embodiment of this application.

[0010] Figure 2 yes Figure 1 A partial schematic diagram of the lamp shown.

[0011] Figure 3 yes Figure 2 A schematic diagram of the optical path structure of the lamp shown.

[0012] Figure 4 yes Figure 2 A schematic diagram of one structure of the light-transmitting cover in the lamp shown.

[0013] Figure 5 yes Figure 2 The diagram shows another structural design of the light-transmitting cover in the lamp.

[0014] Figure 6 yes Figure 3 The diagram shows the structure of the optical guiding module in the optical path.

[0015] Figure 7 yes Figure 2 A schematic diagram of another optical path structure for the lamp shown.

[0016] Figure 8 yes Figure 7 The diagram shows the structure of the optical guiding module in the optical path. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0018] This application provides a lamp 100 for providing illumination to a space. Specifically, the lamp 100 may be a wall lamp, a wall washer lamp, a table lamp, etc.

[0019] Please see Figures 1 to 3 The luminaire 100 may include a light source module 20, a light-transmitting cover 30, and a light guiding module 40. The light source module 20 emits illumination light L. The light source module 20 has a light-emitting surface 210 through which the illumination light L is emitted. Specifically, the illumination light L may include a first sub-beam L1 and a second sub-beam L2, which are located on opposite sides of the light-emitting normal M of the light-emitting surface 210. Here, the "light-emitting normal M" can be understood as the straight line containing the principal optical axis of the illumination light L, which is perpendicular to the light-emitting surface 210 and passes through the geometric center of the light-emitting surface 210. For example, the outer contour of the light-emitting surface 210 may be approximately rectangular, and the center point of the rectangle is the "geometric center of the light-emitting surface 210".

[0020] The light-transmitting cover 30 is spaced apart from the light-emitting surface 210. The light-transmitting cover 30 may include a first light-transmitting part 320 and a second light-transmitting part 340. The first light-transmitting part 320 and the second light-transmitting part 340 are located on opposite sides of the light-emitting normal M. The distance between the first light-transmitting part 320 and the light source module 20 is greater than the distance between the second light-transmitting part 340 and the light source module 20. Here, "the distance between XX and the light source module 20" refers to the straight-line distance between XX and the light source module 20 in the direction of the light-emitting normal M.

[0021] The light guiding module 40 is disposed between the light source module 20 and the light-transmitting cover 30, and is located in the optical path of the illumination light L. It is used to guide the illumination light L to the light-transmitting cover 30. The first sub-beam L1 is guided to the first light-transmitting part 320 via the light guiding module 40, and the second sub-beam L2 is guided to the second light-transmitting part 340 via the light guiding module 40.

[0022] On one hand, the light guiding module 40 is used to guide the first sub-beam L1 to the first light-transmitting part 320 and the second sub-beam L2 to the second light-transmitting part 340, thereby redistributing the illumination light L and improving the energy utilization efficiency of the illumination light L.

[0023] It should be noted that the illumination light L in this embodiment can be considered as spherical light, which includes a portion of the beam with a large angle (e.g., a beam with an exit angle greater than 50 degrees at the light-emitting surface 210). If this portion of the beam were emitted directly, it would deviate from the area where the light-transmitting cover 30 is located, resulting in energy waste. Therefore, this embodiment uses a light guiding module 40 to guide the aforementioned beams (i.e., the first sub-beam L1 and the second sub-beam L2) to change the propagation direction of the beams, so that the large-angle beams generated by the light source module 20 can also be incident on the area where the light-transmitting cover 30 is located, thereby improving the energy utilization efficiency of the illumination light L.

[0024] On the other hand, the light guiding module 40 can also adjust the exit angles of the first sub-beam L1 and the second sub-beam L2. Specifically, the exit angle of the first sub-beam L1 emitted via the light guiding module 40 ( Figure 3 J1) is smaller than the emission angle of the second sub-beam L2 emitted via the light guiding module 40. Figure 3 (J2 in the text). Here, the exit angle refers to the angle formed by the two outermost rays in the beam.

[0025] Since the distance between the first light-transmitting part 320 and the light source module 20 is greater than the distance between the second light-transmitting part 340 and the light source module 20, when the exit angle of the first sub-beam L1 is relatively small, the energy of the first sub-beam L1 incident on the first light-transmitting part 320 can be relatively concentrated, thereby increasing the illumination brightness of the first light-transmitting part 320; while when the exit angle of the second sub-beam L2 is relatively large, the energy of the second sub-beam L2 incident on the second light-transmitting part 340 can be relatively dispersed, thereby reducing the illumination brightness of the second light-transmitting part 340.

[0026] Therefore, under the action of the light guiding module 40, the illumination brightness of different light-transmitting areas of the light-transmitting cover 30 in this embodiment can be approximately equal, so that the overall illumination brightness of the light-transmitting cover 30 can be more uniform, ensuring that the lamp 100 has a better lighting effect.

[0027] The specific structure of the lamp 100 is described below.

[0028] In this embodiment, the lamp 100 may include a base 120 and a lampshade 140. The base 120 can fix and support the light source module 20, the light-transmitting cover 30, and the light guiding module 40. Figure 1In the illustrated embodiment, the base 120 may be axially symmetrical about a designated axis K. Specifically, there are two light source modules 20, two light-transmitting covers 30, and two light-guiding modules 40, each axially symmetrically arranged on the base 120 about the designated axis K. Therefore, the luminaire 100 in this embodiment can achieve bidirectional light emission to improve the illumination range. In some other possible embodiments, the lampshade 140 and the light-transmitting cover 30 may be circular covers, and there may be multiple light source modules 20 and light-guiding modules 40, each corresponding to the other. Multiple light source modules 20 may be spaced around the base 120 to improve the overall illumination brightness of the luminaire 100.

[0029] The lampshade 140 is placed around the outer periphery of the light-transmitting cover 30 and connected to the base 120. It protects the light source module 20, the light-transmitting cover 30, and the light guiding module 40. Specifically, the lampshade 140 and the base 120 can be snapped together to facilitate the removal of the lampshade 140 from the base 120 for maintenance or replacement of the light source module 20, the light-transmitting cover 30, and the light guiding module 40.

[0030] In this embodiment, the light source module 20 is disposed on the base 120. For example, the light source module 20 can be attached to the base 120 or embedded and clipped onto the base 120. Specifically, the light source module 20 can be an LED array, which may include multiple LED beads (not shown in the figure) arranged in an M*N array, with the multiple LED beads jointly defining the light-emitting surface 210. In some possible embodiments, the light-emitting surface 210 may be parallel to a designated axis K.

[0031] Specifically, the light-emitting surface 210 is used to emit an illumination ray L. The illumination ray L may include a first sub-beam L1 and a second sub-beam L2, which are located on opposite sides of the light-emitting normal M of the light-emitting surface 210. Here, "first sub-beam L1 and second sub-beam L2" can be understood as a portion of the illumination ray L, and the first sub-beam L1 and the second sub-beam L2 do not overlap with each other.

[0032] In some possible embodiments, the illumination ray L may consist only of a first sub-beam L1 and a second sub-beam L2. That is, the beam in the illumination ray L located on one side of the specified axis K is considered the first sub-beam L1, and the beam in the illumination ray L located on the other side of the specified axis K is considered the second sub-beam L2. The first sub-beam L1 and the second sub-beam L2 are separated by the specified axis K.

[0033] In some other possible embodiments, the illumination ray L may also include other beams besides the first sub-beam L1 and the second sub-beam L2, which can be regarded as beam components in the illumination ray L with a large exit angle (e.g., the exit angle at the light-emitting surface 210 is greater than 50 degrees).

[0034] exist Figure 3 In the illustrated embodiment, the illumination ray L may further include a third sub-beam L3, which is located between the first sub-beam L1 and the second sub-beam L2, and lies on a designated axis K. As an example, the third sub-beam L3 can be considered as a beam component of the illumination ray L with a small exit angle (e.g., an exit angle at the light-emitting surface 210 less than or equal to 50 degrees).

[0035] Specifically, this embodiment does not specifically limit the way in which the first sub-beam L1, the second sub-beam L2, and the third sub-beam L3 are divided in the illumination ray L. The three can have clear dividing lines or they can not have clear dividing lines.

[0036] In this embodiment, the light-transmitting cover 30 is connected to the base 120 and is used to transmit illumination light L. Specifically, the light-transmitting cover 30 and the base 120 can be snap-fitted together to facilitate the removal of the light-transmitting cover 30 from the base 120 for maintenance or replacement of the light source module 20 and the light guiding module 40. As one implementation, the light-transmitting cover 30 can be a milky white semi-transparent cover.

[0037] Please see Figure 4 and Figure 5 The light-transmitting cover 30 may include a light-transmitting surface 302, which is located on the side of the light-transmitting cover 30 facing the light source module 20 and is spaced apart from the light-emitting surface 210. Specifically, in the direction from the first light-transmitting portion 320 to the second light-transmitting portion 340, the distance between the light-transmitting surface 302 and the light-emitting surface 210 decreases in the direction of the light-emitting normal. That is, in this embodiment, the distance between different areas on the light-transmitting surface 302 and the light-emitting surface 210 is different. Therefore, the light-transmitting cover 30 is asymmetrically arranged with respect to the light-emitting normal M.

[0038] exist Figure 4 In the illustrated embodiment, the light-transmitting surface 302 can be a curved surface protruding towards the light source module 20. Figure 5 In the embodiment shown, the light-transmitting surface 302 can be a plane, and the light-transmitting surface 302 is inclined relative to the light-emitting normal M; that is, the angle between the light-transmitting surface 302 and the light-emitting normal M is an acute angle.

[0039] In this embodiment, the light-transmitting cover 30 may include a first light-transmitting portion 320 and a second light-transmitting portion 340, which are located on opposite sides of the light-transmitting cover 30. The first light-transmitting portion 320 may be an end region of the light-transmitting cover 30 with a relatively large distance from the light source module 20, while the second light-transmitting portion 340 may be an end region of the light-transmitting cover 30 with a relatively small distance from the light source module 20. Specifically, the first light-transmitting portion 320 and the second light-transmitting portion 340 may or may not have a clear boundary line. In this embodiment, the first light-transmitting portion 320 and the second light-transmitting portion 340 may be located on opposite sides of the light-emitting normal M, with the light-emitting normal M serving as the boundary line between them.

[0040] In some possible embodiments, the light-transmitting cover 30 may further include a third light-transmitting portion 360, which connects the first light-transmitting portion 320 and the second light-transmitting portion 340, and can be considered as a transition region between the first light-transmitting portion 320 and the second light-transmitting portion 340. The distance between the third light-transmitting portion 360 and the light source module 20 is greater than the distance between the second light-transmitting portion 340 and the light source module 20, but less than the distance between the first light-transmitting portion 320 and the light source module 20. Here, "the distance between XX and the light source module 20" refers to the straight-line distance between XX and the light source module 20 in the direction of the light-emitting normal M. Specifically, the third light-transmitting portion 360 may be located on the light-emitting normal M.

[0041] It should be noted that the names "first light-transmitting part," "second light-transmitting part," and "third light-transmitting part" are used for ease of description. In specific examples, there may or may not be a clear dividing line between the three structures. In some possible embodiments, the first light-transmitting part 320, the third light-transmitting part 360, and the second light-transmitting part 340 can be integrally molded structures. For example, the light-transmitting cover 30 can be made of plastic through injection molding or machining, and the first light-transmitting part 320, the third light-transmitting part 360, and the second light-transmitting part 340 are three parts at different locations on the light-transmitting cover 30.

[0042] In this embodiment, the light guiding module 40 is disposed between the light source module 20 and the light-transmitting cover 30, and is located on the optical path of the illumination light L. It is used to guide the illumination light L to the light-transmitting cover 30. Please refer again. Figure 3 The light guiding module 40 may include a first reflective surface 401 and a second reflective surface 403. A first sub-beam L1 is reflected by the first reflective surface 401 and then incident on the first light-transmitting portion 320. A second sub-beam L2 is reflected by the light guiding module 40 and then incident on the second light-transmitting portion 340. In embodiments of this application, the first reflective surface 401 and the second reflective surface 403 may be composed of the reflective surface of a total internal reflection lens, or they may be composed of the reflective surface of a mirror, reflector, or the like.

[0043] In some possible embodiments, after reflection by the first reflecting surface 401, the exit angle of the first sub-beam L1 is reduced compared to when it exits from the light-emitting surface 210. Therefore, the first reflecting surface 401 can serve to converge and collimate the first sub-beam L1. On one hand, after the first sub-beam L1 is converged by the first reflecting surface 401, when it is incident on a relatively distant area of ​​the light-transmitting cover 30 (i.e., the first light-transmitting part 320), its corresponding illumination brightness can be greater, thereby improving the illumination brightness of the first light-transmitting part 320. On the other hand, after the first sub-beam L1 is converged by the first reflecting surface 401, it can have better collimation, ensuring that the first sub-beam L1 experiences almost no energy loss when propagating over a long distance, thus guaranteeing the illumination brightness of the first light-transmitting part 320.

[0044] In some other possible embodiments, after reflection by the second reflective surface 403, the exit angle of the second sub-beam L2 increases compared to when it exits from the light-emitting surface 210. Therefore, the second reflective surface 403 can act as a divergent agent for the second sub-beam L2, so that when the second sub-beam L2, after being diverged by the second reflective surface 403, is incident on a relatively close area (i.e., the second light-transmitting part 340) on the light-transmitting cover 30, its corresponding illumination brightness can be smaller, thereby reducing the illumination brightness of the second light-transmitting part 340.

[0045] In some other possible embodiments, after reflection by the first reflecting surface 401, the exit angle of the first sub-beam L1 decreases compared to when it exits from the light-emitting surface 210. After reflection by the second reflecting surface 403, the exit angle of the second sub-beam L2 increases compared to when it exits from the light-emitting surface 210. Specifically, the first reflecting surface 401 and the second reflecting surface 403 can be total internal reflection surfaces. Therefore, the light guiding module 40 in this embodiment can simultaneously increase the illumination brightness of the first light-transmitting portion 320 and decrease the illumination brightness of the second light-transmitting portion 340.

[0046] Therefore, under the action of the light guiding module 40, the illumination brightness of different light-transmitting areas of the light-transmitting cover 30 in this embodiment can be approximately equal, so that the overall illumination brightness of the light-transmitting cover 30 can be more uniform, ensuring that the lamp 100 has a better lighting effect.

[0047] Specifically, on the cross-section formed by the plane passing through the light-emitting normal M, the average tangent slope of the cross-sectional profile of the first reflecting surface 401 relative to the light-emitting surface 210 is greater than the average tangent slope of the cross-sectional profile of the second reflecting surface 403 relative to the light-emitting surface 210. Here, "the average tangent slope of the cross-sectional profile of XX relative to the light-emitting surface 210" can be understood as the average of the slopes of multiple tangents at multiple profile points on the cross-sectional profile of XX relative to the light-emitting surface 210. A larger tangent slope indicates a steeper tangent relative to the light-emitting surface 210; a smaller tangent slope indicates a gentler tangent relative to the light-emitting surface 210.

[0048] It is easy to understand that the average tangent slope of the first reflecting surface 401 is relatively large, resulting in a smaller angle between the reflected ray formed by the first sub-beam L1 acting on the first reflecting surface 401 and the outgoing normal M, thus concentrating the light. Conversely, the average tangent slope of the second reflecting surface 403 is relatively small, resulting in a larger angle between the reflected ray formed by the second sub-beam L2 acting on the second reflecting surface 403 and the outgoing normal M, thus diverging the light.

[0049] Please refer to it again. Figure 4 or Figure 5 In some possible embodiments, on the cross-section formed by the plane passing through the light-emitting normal M, the cross-sectional profile of the first reflecting surface 401 has a first endpoint and a second endpoint (neither shown in the figure). The first endpoint can be the end of the cross-sectional profile of the first reflecting surface 401 that is closer to the light-emitting surface 210, and the second endpoint can be the end of the cross-sectional profile of the first reflecting surface 401 that is farther away from the light-emitting surface 210. Specifically, a first straight line K1 is defined between the first endpoint and the second endpoint, and the angle between the first straight line K1 and the light-emitting surface 210 is a first angle A.

[0050] The cross-sectional profile of the second reflecting surface 403 has a third endpoint and a fourth endpoint (not shown in the figure). The third endpoint can be the end of the cross-sectional profile of the second reflecting surface 403 that is closer to the light-emitting surface 210, and the fourth endpoint can be the end of the cross-sectional profile of the second reflecting surface 403 that is farther away from the light-emitting surface 210. Specifically, a second straight line K2 is defined between the third endpoint and the fourth endpoint, and the angle between the second straight line K2 and the light-emitting surface 210 is a second included angle B. In this embodiment, the second included angle B is smaller than the first included angle A. Therefore, compared to the second reflecting surface 403, the first reflecting surface 401 is more inclined relative to the light-emitting surface 210, so that it can converge and collimate the first sub-beam L1.

[0051] In some possible embodiments, on the cross-section formed by the plane passing through the light-emitting normal M, the end of the cross-sectional profile of the first light-transmitting portion 320 away from the light-emitting normal M and the center point of the light-emitting surface 210 define a third straight line K3, and the angle between the third straight line K3 and the light-emitting surface 210 is a third included angle C. The end of the cross-sectional profile of the second light-transmitting portion 340 away from the light-emitting normal M and the center point of the light-emitting surface 210 define a fourth straight line K4, and the angle between the fourth straight line K4 and the light-emitting surface 210 is a fourth included angle D. In this embodiment, the fourth included angle D is smaller than the third included angle C. Here, the center point of the light-emitting surface 210 refers to the geometric center of the light-emitting surface 210. For example, if the outer contour of the light-emitting surface 210 is approximately circular, then the center point of the light-emitting surface 210 can be its center; or, if the outer contour of the light-emitting surface 210 is approximately rectangular, then the center point of the light-emitting surface 210 can be its center.

[0052] Specifically, the first included angle A and the third included angle C are positively correlated, and the second included angle B and the fourth included angle D are positively correlated, so that the first sub-beam L1 and the second sub-beam L2 emitted from the light source module 20 can be smoothly incident on the corresponding area on the light-transmitting cover 30, thereby improving the energy utilization efficiency of the illumination light L.

[0053] Please refer to it again. Figure 2 and Figure 3 In some possible embodiments, the illumination beam L may further include a third sub-beam L3, and the light-transmitting cover 30 may further include a third light-transmitting portion 360. In this case, the light guiding module 40 is also used to guide the third sub-beam L3 to the third light-transmitting portion 360. Specifically, the third sub-beam L3 is refracted by the light guiding module 40 and then incident on the third light-transmitting portion 360.

[0054] exist Figure 3 In the illustrated embodiment, the exit angle of the third sub-beam L3 emitted via the light guiding module 40 is greater than the exit angle of the first sub-beam L1 emitted via the light guiding module 40. That is, the exit angle of the third sub-beam L3 is relatively large, so that the energy of the third sub-beam L3 incident on the third light-transmitting portion 360 can be relatively dispersed. When the illumination brightness of the first light-transmitting portion 320 and the second light-transmitting portion 340 is approximately equal, the illumination brightness of the transition area on the light-transmitting cover 30 (i.e., the area between the first light-transmitting portion 320 and the second light-transmitting portion 340) can also be approximately equal, so that the overall illumination brightness of the light-transmitting cover 30 can be more uniform, ensuring that the lamp 100 has a better illumination effect.

[0055] Please see Figure 6The light guiding module 40 may be provided with a light entrance cavity 405, and the light source module 20 is disposed in the light entrance cavity 405 so that the illumination light L can be fully incident into the light entrance cavity 405 to ensure the light utilization efficiency of the light guiding module 40. Specifically, the light entrance cavity 405 may include a first light entrance surface 406, a second light entrance surface 407, and a third light entrance surface 408. The third light entrance surface 408 is connected between the first light entrance surface 406 and the second light entrance surface 407 to jointly define the light entrance cavity 405 with the first light entrance surface 406 and the second light entrance surface 407.

[0056] In this embodiment, the first incident surface 406 is located on the optical path of the first sub-beam L1, the second incident surface 407 is located on the optical path of the second sub-beam L2, and the third incident surface 408 is located on the optical path of the third sub-beam L3. Therefore, in this embodiment, the portion of the illumination ray L incident on the first incident surface 406 is referred to as "the first sub-beam L1," the portion of the illumination ray L incident on the second incident surface 407 is referred to as "the second sub-beam L2," and the portion of the illumination ray L incident on the third incident surface 408 is referred to as "the third sub-beam L3."

[0057] Specifically, the distance between the side of the third light-incident surface 408 closest to the first light-incident surface 406 and the light source module 20 is greater than the distance between the side of the third light-incident surface 408 closest to the second light-incident surface 407 and the light source module 20, so that the third sub-beam L3 emitted through the light guiding module 40 is deflected toward the side of the second light-incident surface 407. Here, "the distance between XX and the light source module 20" can be understood as the straight-line distance between XX and the light source module 20 in the direction of the light-emitting normal M.

[0058] It should be noted that because the second light-incident surface 407 diverges the second sub-beam L2, the illumination uniformity at the second light-transmitting part 340 is poor. Therefore, in this embodiment, the third light-incident surface 408 is tilted towards one side of the second light-incident surface 407, so that the third sub-beam L3 incident through the third light-incident surface 408 will be deflected towards one side of the second light-incident surface 407. This allows a portion of the third sub-beam L3 to overlap with the second sub-beam L2, and allows a portion of the third sub-beam L3 to be incident on the boundary area between the second light-transmitting part 340 and the third light-transmitting part 360, ensuring a more uniform overall illumination effect on the light-transmitting cover 30.

[0059] In some possible embodiments, such as Figure 2 and Figure 6As shown, the light guiding module 40 may include a first lens 410, which is asymmetrically arranged about the light-emitting normal M. An incident light cavity 405 is disposed within the first lens 410, and the first lens 410 also includes a third light-emitting surface 409. The incident light cavity 405 is disposed on the side of the first lens 410 opposite to the third light-emitting surface 409. The first lens 410 may also include the aforementioned first reflecting surface 401 and second reflecting surface 403. The first reflecting surface 401 is disposed on the side of the first lens 410 opposite to the first incident light surface 406, and the second reflecting surface 403 is disposed on the side of the first lens 410 opposite to the second incident light surface 407. The third light-emitting surface 409 connects the first reflecting surface 401 and the second reflecting surface 403, together with the first reflecting surface 401 and the second reflecting surface 403, defining the outer contour of the first lens 410.

[0060] Specifically, the first sub-beam L1 is transmitted through the first incident surface 406, reflected by the first reflecting surface 401, and then exits through the third exiting surface 409 to propagate to the first transmitting section 320. The second sub-beam L2 is transmitted through the second incident surface 407, reflected by the second reflecting surface 403, and then exits through the third exiting surface 409 to propagate to the second transmitting section 340. The third sub-beam L3 is transmitted through the third incident surface 408, exits through the third exiting surface 409, and propagates to the third transmitting section 360.

[0061] It should be noted that, due to the relatively large average tangent slope of the first reflecting surface 401, the angle between the reflected ray formed by the first sub-beam L1 acting on the first reflecting surface 401 and the emitting normal M is small. This results in a smaller deflection angle when refracted at the third emitting surface 409, ensuring the light beam is relatively concentrated. Conversely, the relatively small average tangent slope of the second reflecting surface 403 results in a larger angle between the reflected ray formed by the second sub-beam L2 acting on the second reflecting surface 403 and the emitting normal M. This also results in a larger deflection angle when refracted at the third emitting surface 409, further enhancing the light beam's divergence.

[0062] Specifically, a total reflection film can be attached or plated on the first reflecting surface 401 and the second reflecting surface 403 of the first lens 410 to achieve total reflection of light. Therefore, the light guiding module 40 in this embodiment only needs a single lens to guide the illumination light L, which can reduce the installation difficulty of the light guiding module 40.

[0063] In other possible embodiments, such as Figure 7 and Figure 8As shown, the light guiding module 40 may include a second lens 430 and a reflector 450, both of which are asymmetrically arranged about the light-emitting normal M. An entrance cavity 405 is disposed within the second lens 430, and the second lens 430 also includes a fourth light-emitting surface 436. The entrance cavity 405 is disposed on the side of the second lens 430 opposite to the fourth light-emitting surface 436. The second lens 430 may also include a first light-emitting surface 432 and a second light-emitting surface 434. The first light-emitting surface 432 is disposed on the side of the second lens 430 opposite to the first entrance surface 406, and the second light-emitting surface 434 is disposed on the side of the second lens 430 opposite to the second entrance surface 407. The fourth light-emitting surface 436 connects the first and second light-emitting surfaces 432 and 434, thus defining the outer contour of the second lens 430 together with the first and second light-emitting surfaces 432 and 434.

[0064] A reflector 450 is sleeved on the outer periphery of the second lens 430. The reflector 450 may include the first reflective surface 401 and the second reflective surface 403 described above. The first reflective surface 401 is spaced apart from the first light-emitting surface 432, and the second reflective surface 403 is spaced apart from the second light-emitting surface 434. Specifically, the reflector 450 may be a reflective cup, and the first reflective surface 401 and the second reflective surface 403 are respectively the inner surfaces of the reflective cup. For example, a metal reflective layer (e.g., aluminum film, silver film, etc.) may be deposited on the inner surface of the reflective cup.

[0065] Specifically, the first sub-beam L1 is transmitted sequentially through the first incident surface 406 and the first exit surface 432, and then reflected by the first reflecting surface 401 to propagate to the first light-transmitting section 320. The second sub-beam L2 is transmitted sequentially through the second incident surface 407 and the second exit surface 434, and then reflected by the second reflecting surface 403 to propagate to the second light-transmitting section 340. The third sub-beam L3 is transmitted through the third incident surface 408 and then exits through the fourth exit surface 436 to propagate to the third light-transmitting section 360.

[0066] Therefore, the light guiding module 40 in this embodiment uses a combination of lenses and reflectors, allowing for greater flexibility in adjusting the optical path. Furthermore, compared to... Figure 2 The light guiding module 40 in this embodiment uses a single lens to reduce the processing difficulty and cost of the lens, thereby reducing the overall hardware cost of the lamp 100.

[0067] It is not difficult to see here that, Figure 3 and Figure 7 In the embodiment shown, the first reflective surface 401 and the second reflective surface 403 are asymmetrically arranged with respect to the light-emitting normal M to adjust the emission angle of the first sub-beam L1 and the second sub-beam L2 so that the illumination brightness of different light-transmitting areas on the light-transmitting cover 30 can be approximately equal.

[0068] In some other possible embodiments, the first reflective surface 401 and the second reflective surface 403 may be symmetrically arranged about the light-emitting normal M. The light-guiding module 40 may also include a light-emitting surface (e.g., Figure 6 The third light-emitting surface 409 in the figure may include a first light-emitting region and a second light-emitting region (neither shown in the figure). The first sub-beam L1 is refracted through the first light-emitting region and then enters the first light-transmitting part 320, and the second sub-beam L2 is refracted through the second light-emitting region and then enters the second light-transmitting part 340.

[0069] As an example, the angle between the first light-emitting region and the light-emitting normal M and the angle between the second light-emitting region and the light-emitting normal M are not equal, so that the emission angle of the first sub-beam L1 emitted through the first light-emitting region can be smaller than the emission angle of the second sub-beam L2 emitted through the second light-emitting region.

[0070] As another example, the first light-emitting region and the second light-emitting region can each be provided with multiple refractive microstructures. The arrangement of the multiple refractive microstructures in the first light-emitting region is different from that in the second light-emitting region, so that the emission angle of the first sub-beam L1 emitted through the first light-emitting region can be smaller than the emission angle of the second sub-beam L2 emitted through the second light-emitting region. Specifically, this embodiment does not limit the implementation method of the light-emitting surface.

[0071] This application provides a lamp 100, which may include a light source module 20, a light-transmitting cover 30, and a light guiding module 40. The light source module 20 emits illumination light L. The light source module 20 has a light-emitting surface 210 through which the illumination light L is emitted. Specifically, the illumination light L may include a first sub-beam L1 and a second sub-beam L2, which are located on opposite sides of the light-emitting normal M of the light-emitting surface 210. The light-transmitting cover 30 is spaced apart from the light-emitting surface 210 and may include a first light-transmitting portion 320 and a second light-transmitting portion 340, which are located on opposite sides of the light-emitting normal M. The distance between the first light-transmitting portion 320 and the light source module 20 is greater than the distance between the second light-transmitting portion 340 and the light source module 20. The light guiding module 40 is disposed between the light source module 20 and the light-transmitting cover 30, and is located in the optical path of the illumination light L. It is used to guide the illumination light L to the light-transmitting cover 30. The first sub-beam L1 is guided to the first light-transmitting part 320 via the light guiding module 40, and the second sub-beam L2 is guided to the second light-transmitting part 340 via the light guiding module 40.

[0072] On one hand, the light guiding module 40 is used to guide the first sub-beam L1 to the first light-transmitting part 320 and the second sub-beam L2 to the second light-transmitting part 340, thereby redistributing the illumination light L and improving the energy utilization efficiency of the illumination light L.

[0073] On the other hand, the light guiding module 40 can also adjust the emission angles of the first sub-beam L1 and the second sub-beam L2. Specifically, the emission angle of the first sub-beam L1 emitted through the light guiding module 40 is smaller than the emission angle of the second sub-beam L2 emitted through the light guiding module 40. Since the distance between the first light-transmitting part 320 and the light source module 20 is greater than the distance between the second light-transmitting part 340 and the light source module 20, when the emission angle of the first sub-beam L1 is relatively small, the energy of the first sub-beam L1 incident on the first light-transmitting part 320 can be relatively concentrated, thereby increasing the illumination brightness of the first light-transmitting part 320; while when the emission angle of the second sub-beam L2 is relatively large, the energy of the second sub-beam L2 incident on the second light-transmitting part 340 can be relatively dispersed, thereby reducing the illumination brightness of the second light-transmitting part 340.

[0074] Therefore, under the action of the light guiding module 40, the illumination brightness of different light-transmitting areas of the light-transmitting cover 30 in this embodiment can be approximately equal, so that the overall illumination brightness of the light-transmitting cover 30 can be more uniform, ensuring that the lamp 100 has a better lighting effect.

[0075] In this application specification, certain terms are used to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem within a certain margin of error and basically achieve the technical effect.

[0076] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0077] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A lamp, characterized in that, include: A light source module for emitting illumination light, the light source module having a light-emitting surface; the illumination light includes a first sub-beam and a second sub-beam, the first sub-beam and the second sub-beam being located on opposite sides of the light-emitting normal of the light-emitting surface; A light-transmitting cover is disposed at a distance from the light-emitting surface; the light-transmitting cover includes a first light-transmitting portion and a second light-transmitting portion, the first light-transmitting portion and the second light-transmitting portion being located on opposite sides of the light-emitting normal, the distance between the first light-transmitting portion and the light source module being greater than the distance between the second light-transmitting portion and the light source module; wherein, the light-transmitting cover is asymmetrically disposed about the light-emitting normal; the light-transmitting cover includes a light-transmitting surface, the light-transmitting surface being located on the side of the light-transmitting cover facing the light source module; in the direction from the first light-transmitting portion to the second light-transmitting portion, the distance between the light-transmitting surface and the light-emitting surface decreases in the direction of the light-emitting normal; A light guiding module is disposed between the light source module and the light-transmitting cover, and located in the optical path of the illumination light, for guiding the illumination light to the light-transmitting cover; wherein, the first sub-beam is guided to the first light-transmitting part via the light guiding module, and the second sub-beam is guided to the second light-transmitting part via the light guiding module; the emission angle of the first sub-beam emitted via the light guiding module is smaller than the emission angle of the second sub-beam emitted via the light guiding module.

2. The lamp according to claim 1, characterized in that, The light guiding module includes a first reflective surface and a second reflective surface. The first sub-beam is reflected by the first reflective surface and then incident on the first light-transmitting part. The second sub-beam is reflected by the light guiding module and then incident on the second light-transmitting part. Wherein, after reflection by the first reflecting surface, the exit angle of the first sub-beam decreases; or / and, after reflection by the second reflecting surface, the exit angle of the second sub-beam increases.

3. The lamp according to claim 2, characterized in that, On the cross-section formed by the plane passing through the light-emitting normal, the average tangent slope of the cross-sectional profile of the first reflecting surface relative to the light-emitting surface is greater than the average tangent slope of the cross-sectional profile of the second reflecting surface relative to the light-emitting surface.

4. The lamp according to claim 2, characterized in that, On the cross section formed by the plane passing through the light-emitting normal, the cross section profile of the first reflecting surface has a first endpoint and a second endpoint, a first straight line is defined between the first endpoint and the second endpoint, and the angle between the first straight line and the light-emitting surface is the first angle. The cross-sectional profile of the second reflective surface has a third endpoint and a fourth endpoint, and a second straight line is defined between the third endpoint and the fourth endpoint. The angle between the second straight line and the light-emitting surface is a second angle; the second angle is smaller than the first angle.

5. The lamp according to claim 2, characterized in that, On the cross-section formed by the plane passing through the light-emitting normal, the end of the cross-sectional profile of the first light-transmitting part away from the light-emitting normal and the center point of the light-emitting surface define a third straight line, and the included angle between the third straight line and the light-emitting surface is the third included angle. The fourth straight line is defined by the end of the cross-sectional profile of the second light-transmitting part away from the light-emitting normal and the center point of the light-emitting surface. The angle between the fourth straight line and the light-emitting surface is the fourth included angle. The fourth included angle is smaller than the third included angle.

6. The lamp according to claim 1, characterized in that, The illumination beam also includes a third sub-beam, which is located between the first sub-beam and the second sub-beam; The light-transmitting cover further includes a third light-transmitting part, which is connected between the first light-transmitting part and the second light-transmitting part; the third sub-beam is refracted by the light guiding module and then incident on the third light-transmitting part.

7. The lamp according to claim 6, characterized in that, The distance between the third light-transmitting part and the light source module is greater than the distance between the second light-transmitting part and the light source module, but less than the distance between the first light-transmitting part and the light source module; The exit angle of the third sub-beam emitted through the light guiding module is greater than the exit angle of the first sub-beam emitted through the light guiding module.

8. The lamp according to claim 6, characterized in that, The light guiding module is provided with a light entrance cavity, and the light source module is disposed in the light entrance cavity; The light-incident cavity includes a first light-incident surface, a second light-incident surface, and a third light-incident surface, wherein the third light-incident surface is connected between the first light-incident surface and the second light-incident surface; wherein the first light-incident surface is located on the optical path of the first sub-beam, the second light-incident surface is located on the optical path of the second sub-beam, and the third light-incident surface is located on the optical path of the third sub-beam. The distance between the side of the third light-incident surface closest to the first light-incident surface and the light source module is greater than the distance between the side of the third light-incident surface closest to the second light-incident surface and the light source module, so that the third sub-beam emitted through the light guiding module is deflected toward the side of the second light-incident surface.

9. The lamp according to claim 8, characterized in that, The light guiding module includes a first lens; the light entrance cavity is disposed on the first lens, and the first lens also includes a first reflective surface and a second reflective surface. The first reflective surface is disposed on the side of the first lens away from the first light entrance surface. The first sub-beam is transmitted through the first light entrance surface and then reflected by the first reflective surface to propagate to the first light-transmitting part. The second reflective surface is disposed on the side of the first lens opposite to the second incident light surface. After the second sub-beam is transmitted through the second incident light surface, it is reflected by the second reflective surface to propagate to the second light-transmitting part.

10. The lamp according to claim 8, characterized in that, The light guiding module includes a second lens and a reflector; the light entrance cavity is disposed in the second lens, and the second lens also includes a first light exiting surface and a second light exiting surface, the first light exiting surface is disposed on the side of the second lens opposite to the first light entrance surface, and the second light exiting surface is disposed on the side of the second lens opposite to the second light entrance surface; The reflector is sleeved on the outer periphery of the second lens; the reflector includes a first reflective surface and a second reflective surface, the first reflective surface and the first light-emitting surface are arranged at a distance from each other, the first sub-beam is transmitted through the first light-incident surface and the first light-emitting surface in sequence and then reflected by the first reflective surface to propagate to the first light-transmitting part. The second reflective surface and the second light-emitting surface are arranged at a distance from each other. The second sub-beam is transmitted through the second light-incident surface and the second light-emitting surface in sequence, and then reflected by the second reflective surface to propagate to the second light-transmitting part.

11. The luminaire according to any one of claims 1 to 10, characterized in that, The light-transmitting surface is a curved surface that protrudes towards the light source module; or, the light-transmitting surface is a plane.

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