CN111120969A

CN111120969A - Lenses and lamps

Info

Publication number: CN111120969A
Application number: CN201911419155.8A
Authority: CN
Inventors: 刘红举; 饶汉鑫
Original assignee: Shenzhen Eastfield Lighting Co Ltd
Current assignee: Shenzhen Eastfield Lighting Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-05-08
Also published as: AU2020294367A1

Abstract

This invention relates to a lens and a luminaire, wherein the lens includes an entrance groove and an exit surface located at opposite ends on the Z-axis of the lens, and a reflecting surface located on the side of the lens. The exit surface includes a flat surface and an oblique surface. The oblique surface is parallel to the Y-axis, and the flat surface is parallel to both the X-axis and the Y-axis. The ratio of the projected area of the oblique surface on the XY plane to the area of the flat surface is 1/3 to 1/1. The luminaire described above can produce low glare through the lens.

Description

Lens and lamp

Technical Field

The invention relates to the technical field of lighting appliances, in particular to a lens and a lamp comprising the lens.

Background

As semiconductor technology is continuously developed, indoor lighting using LEDs (Light Emitting diodes) is gradually developed from alternative bulb lamps to professional and high value-added lamps, and similarly, applications of LEDs and outdoor lighting are also gradually developed from road lighting in small illumination areas to illumination in open and wide sports grounds. Therefore, higher requirements are put forward on the reflecting cover of the LED lamp, such as high power, low glare, high uniformity in a large range and the like. The characteristics of high glare, too small illumination range or low illumination uniformity of the traditional LED lamp are not suitable for open and broad sports grounds.

Disclosure of Invention

Therefore, the lens and the lamp comprising the lens are provided, and the lamp mainly has the characteristic of low glare.

In order to achieve the technical effect, the following technical scheme is adopted in the application.

A lens comprises an incident groove, an emergent surface and a reflecting surface, wherein the incident groove and the emergent surface are positioned at two opposite ends of the Z axis of the lens, the reflecting surface is positioned on the side surface of the lens, the emergent surface comprises a flat transparent surface and an inclined transparent surface, the inclined transparent surface is parallel to the Y axis, the flat transparent surface is parallel to the X axis and the Y axis simultaneously, and the area ratio of the projection area of the inclined transparent surface on the XY plane to the flat transparent surface is 1/3-1/1.

In order to make the light rays in the light beam emitted from the lens have different emitting angles, the emitting surface of the lens comprises a flat transparent surface and an inclined transparent surface. The flat transparent surface and the oblique transparent surface form a certain included angle, one part of light passing through the emergent surface is directly emitted from the flat transparent surface, the other part of light is obliquely emitted from the oblique transparent surface after being refracted, therefore, the emergent angles of the light passing through the flat transparent surface and the oblique transparent surface are different, the intensity of light transmitted along the same direction is weakened, when the human eyes look at the lamp directly, the intensity of the light directly emitted into the human eyes from the lamp is weakened, and the glare phenomenon is reduced. When the ratio of the area of the emergent surface occupied by the oblique transmission surface to the area of the flat transmission surface is 1/3-1/1, the glare reduction effect of the lens is better.

In some embodiments, the exit surface includes a plurality of the oblique transparent surfaces, and a connecting surface connecting adjacent ones of the flat transparent surfaces or the oblique transparent surfaces, the connecting surface is perpendicular to the flat transparent surfaces, and the plurality of the oblique transparent surfaces and the connecting surface are alternately arranged in a zigzag manner.

In some embodiments, the flat surface is located on one side of the oblique surface with respect to the positive direction of the X axis, a normal of the oblique surface is directed to one side outside the lens, and an included angle between the normal of the oblique surface and the positive direction of the X axis is an obtuse angle.

In some of these embodiments, the normal to the oblique-penetration surface is at an angle of 100 ° to 130 ° to the positive direction of the X-axis.

In some embodiments, the reflective surface comprises a first side reverse surface parallel to the Y axis, the first side reverse surface is parabolic, the incident groove comprises a front transparent surface parallel to the Y axis and a first side transparent surface, the front transparent surface faces the exit surface, and the first side transparent surface is located at the side of the incident groove.

In some of these embodiments, the front transparent surface includes a curved surface that protrudes into the entrance slot.

In some embodiments, the reflecting surface includes a second side reverse surface parallel to the X axis and opposite to the X axis, the incident slot includes a second side transparent surface parallel to the X axis and opposite to the X axis, the second side transparent surface is located on a side surface of the incident slot, in a direction from the opening to the bottom of the incident slot, the opposite second side transparent surfaces gradually close to each other, and the opposite second side reverse surfaces gradually move away from each other.

In some of these embodiments, the acute angle between the second lateral side and the Y-axis is 75 ° and the acute angle between the second lateral side and the Y-axis is 68 °.

A lamp comprises a light source, a lamp panel and the lens as claimed in any one of claims 1 to 8, wherein the light source is fixedly connected to the lamp panel and placed in an incident groove of the lens, and the lens is fixedly connected to the lamp panel.

In some embodiments, the light source is an LED lamp, and a plurality of the light sources are arranged in parallel along the Y-axis.

Drawings

FIG. 1 is a schematic view of a lens configuration provided herein;

FIG. 2 is a schematic cross-sectional view of the lens shown in FIG. 1 in the XZ plane;

FIG. 3 is a graph of the beam pattern of the lens shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view of the lens shown in FIG. 1 in the YZ plane;

fig. 5 is a schematic structural diagram of a lamp provided by the present application and including a lens as shown in fig. 1.

Reference numerals:

110, a lamp panel; 120, a light source;

200, a lens; 210, a reflective surface; 211, first side opposite; 212, a second side-opposing surface; 220, an exit surface; 221, a flat transparent surface; 222, oblique transparent surface; 223, a connection surface; 230, an entrance slot; 231, a front transparent surface; 232, a first side transparent surface; 233, a second side transparent surface.

Detailed Description

Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and similar directional or positional expressions are used herein for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The application provides a lens and a lamp, which are mainly used for generating low glare and further generating uniform light in a large range.

Referring to fig. 1, which is a schematic structural diagram of a lens 100 provided in the present application, the lens 100 mainly includes an incident groove 230 located at two opposite ends of the lens 100, an exit surface 220, and a reflective surface 210 located at a side surface of the lens 100. The incident groove 230 is used for accommodating a light source and refracting light from the light source, part of the light source is reflected by the reflecting surface 210 and then irradiates the exit surface 220 along a specific direction, and other part of the light source is refracted by the incident groove 230 and then directly irradiates the exit surface 220, and is emitted after the exit direction is adjusted by the exit surface 220, so that low glare is generated.

The phenomenon of glare vision is mainly caused by two reasons, the first is that strong light directly enters eyes to cause glare, such as the phenomenon of glare vision when the eyes are directly seen by sunlight, and the second is that the glare is caused by uneven light distribution, such as the phenomenon that a curtain is pulled open in the early morning and outdoor bright light suddenly enters eyes to cause discomfort of the eyes. Therefore, in order to generate low glare, the light beams emitted from the lens 100 need to have different angles of emitted light, and further, the glare phenomenon can be reduced by adjusting the uniformity of illumination.

In order to make the light rays in the light beam emitted from the lens 100 have different exit angles, in one embodiment, referring to fig. 1, the exit surface 220 includes a flat transparent surface 221 and a slanted transparent surface 222. A certain included angle is formed between the flat transparent surface 221 and the oblique transparent surface 222, and a part of light passing through the emergent surface 220 is directly emitted from the flat transparent surface, and the other part of light is obliquely emitted from the oblique transparent surface 222 after being refracted, so that the emergent angles of the light passing through the flat transparent surface 221 and the oblique transparent surface 222 are different, the intensity of light propagating along the same direction is weakened, when a person looks straight at the lamp, the intensity of the light directly emitted into the person from the lamp is weakened, and the glare phenomenon is reduced.

To more clearly explain the specific structure of the lens 100, a rectangular coordinate system is now established based on the lens 100, and the coordinate axes are determined. Referring to fig. 1, the flat transparent surface 221 is parallel to the XY plane, and the oblique transparent surface 222 is parallel to the Y axis in the XY plane, so as to determine the Y axis and the X axis and the Z axis. The entrance groove 230 and the exit surface 220 are located at both ends in the Z-axis direction, respectively.

Based on the above embodiment, when the ratio of the projection area of the oblique transparent surface 222 on the XY plane to the area of the flat transparent surface 221 is 1/3-1/1, the glare reduction effect is better.

The flat transparent surface 221 and the oblique transparent surface 222 have different ratios on the exit surface 220 depending on the application. In a narrow room, the power requirement of the light source is low, the intensity of the light generated by the light source is also weak, and correspondingly, the glare phenomenon generated by the light source is also weak, so that the uniformity of the light can be better ensured on the premise of ensuring the low glare of the light source, and in the above situation, the ratio of the projection area of the oblique transparent surface 222 on the XY plane to the area of the flat transparent surface 221 is set to be about 1/2. In open outdoor, for example, when the light source is applied to illumination on a sports ground, the power requirement of the light source is high, the intensity of light generated by the light source is also high, and in order to better ensure low glare of light, the ratio of the projection area of the oblique transparent surface 222 on the XY plane to the area of the flat transparent surface 221 may be set to about 1/1.

It is understood that, from the light-emitting property, the light emitted from the flat transparent surface 221 and the light emitted from the oblique transparent surface 222 have only the difference of the emission angle, and therefore, the ratio between the flat transparent surface 221 and the oblique transparent surface 222 may be replaced by: in a narrow room, the power requirement of the light source is low, and the intensity of the light generated by the light source is also low, so that in order to better ensure the uniformity of the light, the ratio of the area of the flat transparent surface 221 to the projection area of the inclined transparent surface 222 on the XY plane can be set to about 1/2; in open outdoor, for example, when the light source is applied to illumination on a sports ground, the power requirement of the light source is high, the intensity of light generated by the light source is also high, and in order to better ensure low glare of light, the ratio of the projection area of the oblique transparent surface 222 on the XY plane to the area of the flat transparent surface 221 may be set to about 1/1. In summary, the greater the source power applied by the lens 100, the closer the ratio of the slanted transparent surface 222 to the flat transparent surface 221 is to 1/1.

In one embodiment, only the slanted transmissive surface 222 and the flat transmissive surface 221 are included on the exit surface 220, and the projection area of the slanted transmissive surface 222 on the XY plane is 1/4-1/2 of the area of the exit surface 220. Because of the difficulty in designing the slanted transparent surface 222 and the high manufacturing cost, it is advantageous to control the proportion of the slanted transparent surface 222 not to exceed 1/2 for cost saving.

The specific structure and advantages of the lens 100 are explained below with reference to fig. 2 and 3.

Fig. 2 is a schematic cross-sectional view of the lens 100 with the light source 120 mounted thereon at the light emitting point of the light source 120 when viewed from the Y-axis. The entrance groove 230 includes a front transparent surface 231 parallel to the Y-axis and two first side transparent surfaces 232, wherein the front transparent surface 231 corresponds to the groove bottom surface of the entrance groove 230, and the first side transparent surfaces 232 correspond to one of the side surfaces of the entrance groove 230; the reflective surface 210 includes two first-side opposing surfaces 211 parallel to the Y-axis, wherein the first-side opposing surfaces 211 are parabolic. With a vertical line perpendicular to the flat transparent surface 221 in the exit surface 220 at the light emitting point of the light source 120 as a symmetry axis, the two first side transparent surfaces 232 are symmetrical about the symmetry axis, and the two first side reverse surfaces 211 are on the same parabolic curved surface. A part of the light emitted from the light source in the incident groove 230 is radiated to the first side transparent surface 232 of the incident groove 230, then refracted by the first side transparent surface 232 and irradiated to the first side reverse surface 211, and reflected by the first side reverse surface 211 and projected onto the exit surface 220 in parallel to the Z axis, as shown by the light rays L1 and L3, the part of the light beam is parallel light; the other part is refracted by the positive transparent surface 231 and then projected onto the exit surface 220 as shown by a light ray L2.

When the front transparent surface 231 is a flat surface, the light beam refracted by the front transparent surface 231 still has a certain divergence angle, and the front transparent surface 231 is set to be a curved surface protruding into the incident groove 230 so that the light beam refracted by the front transparent surface 231 becomes parallel light. A plano-convex lens is assumed on the basis of the positive transparent surface 231, and the positive transparent surface 231 is regarded as a convex surface of the plano-convex lens, and the light source 120 is disposed at a focal point of the plano-convex lens. From the reversibility of light, the light emitted from the light source 120 is refracted by the front transparent surface 231 and then is irradiated onto the emission surface 220 as parallel light.

The parallel light irradiated onto the exit surface 220 partially passes through the transparent flat surface 221 and then exits directly. As shown in fig. 2, since the incident direction of the light L1 on the planar transparent surface 221 is perpendicular to the planar transparent surface 221, i.e., the incident angle is 0, and the exit angle is also 0 according to the law of refraction, the light L1 will directly exit the planar transparent surface 221 without being shifted in the X direction.

The other part of the parallel light is refracted by the oblique transmission surface 222 and then shifted in the X-axis direction. As shown in fig. 2, when the incident direction of the light L3 on the oblique transmission surface 222 is oblique to the oblique transmission surface 222, and the incident angle B1 is greater than 0, the light L3 exits at an exit angle B2 greater than the incident angle B1 according to the law of refraction, and therefore, the light L3 is shifted (B2-B1) in the X-axis direction.

In summary, a certain angle is formed between the light L1 emitted from the flat transparent surface 221 and the light L3 emitted from the oblique transparent surface 222, and the angle is (B2-B1). When the light ray L1 is directed into the eye, the light ray L2 enters the eye in an oblique manner. Therefore, the design reduces the light intensity directly entering the eyes and reduces the glare phenomenon.

In order to reduce glare and not to weaken the light intensity of the light irradiation surface, the light beam deflected in the X-axis direction is required to be deflected toward the directly emitted light beam, and as shown in fig. 2, the deflected emitted light beam L3 is located on the right side of the direct light beam L1, and the light beam L3 is deflected toward the left side after being emitted and is converged to the light beam L1. To achieve the above-mentioned effect, referring to fig. 2, the tilted transmission surface 222 has a normal F, the normal F points to the side of the tilted transmission surface 222 outside the lens 200, and the flat transmission surface 221 is located on the side of the tilted transmission surface 222 in the positive X-axis direction, so that the normal F forms an included angle a1 with the positive X-axis direction, and the included angle a1 is an obtuse angle.

Optionally, the angle A1 is 100-130, and when the above design is satisfied, the lamp using the lens 200 has a good low glare effect. Specifically, the angle a1 is 125 °, and when the above design is satisfied, the lamp using the lens 200 has a better low glare effect.

In one embodiment, the plurality of slanted transmissive surfaces 222 have different slanted angles, and the different slanted angles can generate light rays with different exit angles, thereby further reducing the glare phenomenon.

In one embodiment, the exit surface 220 further includes a connection surface 223 connecting the adjacent flat transmission surfaces 221 and the inclined transmission surfaces 222, and the connection surface 223 is perpendicular to the flat transmission surfaces 221, the inclined transmission surfaces 222 are plural, and the plurality of inclined transmission surfaces 222 and the connection surface 223 are alternately arranged in a zigzag manner. The arrangement of the plurality of oblique transmission surfaces 222 is beneficial to increasing the effective light emitting area of the oblique transmission surfaces 222 under the condition that the inclination angle of the oblique transmission surfaces 222 is not changed and the thickness of the lens 200 occupied by the oblique transmission surfaces 222 is not increased.

Referring to fig. 3, a light pattern diagram of the lens 200 provided in the present application when the light source 120 is disposed therein is shown. Please refer to the XZ surface light type cd2 in fig. 3, wherein the XZ surface light type cd2 is the XZ surface light type acquired in the embodiment shown in fig. 2, and it can be seen that although the light emitted through the emitting surface 220 has two different angles, the light type of the XZ surface light type cd2 is still relatively uniform, and no beam splitting occurs.

Fig. 4 is a schematic cross-sectional view of the lens 100 with the light source 120 mounted thereon at the light emitting point of the light source 120 when viewed from the X-axis. The input slot 230 further comprises two second lateral transmission faces 233 parallel to the X-axis; the reflective surface 210 further includes two second side opposing surfaces 212 parallel to the X-axis. With a perpendicular line drawn perpendicular to the flat transparent surface 221 in the exit surface 220 at the light emitting point of the light source 120 as an axis of symmetry, the two second side transparent surfaces 233 are symmetrical with respect to the axis of symmetry, and the two second side opposite surfaces 212 are symmetrical with respect to the axis of symmetry. In a direction from the opening to the bottom of the entrance groove 230, i.e., in the positive direction of the illustrated Z-axis, the two second side transparent surfaces 233 gradually come close to each other, and the two second side opposite surfaces 212 gradually come away from each other. The above design has the effect of concentrating and uniformly illuminating the light of the light source 120.

As shown in fig. 4, the light emitted from the light source 120 has a divergence angle of 180 °, and in order to meet the illumination requirement, the light emitted from the light source 120 needs to be converged. The light emitted from the light source 120 includes a small-angle light ray, such as a small-angle light ray L5, irradiated to the front transmissive surface 231, and a large-angle light ray, such as a large-angle light ray L4, irradiated to the second side transmissive surface 233. The small-angle light L5 is refracted by the transparent surface 231 and then exits from the exit surface 220, and in the view angle shown in the figure, the transparent surface 231 is relatively parallel to the exit surface 220, so the divergence angle of the small-angle light L5 does not change after exiting from the exit surface 220. The high-angle light L4 is refracted by the second side transparent surface 233, reflected by the second side reverse surface 212, and finally emitted from the emitting surface 220, wherein the second side reverse surface 212 causes the largest angle change to the high-angle light L4, so that the emitting angle of the high-angle light L4 is greatly reduced, and the effect of beam bunching is achieved.

For better uniformity of light emission, the divergence angle of the small-angle light L5 and the large-angle light L4 emitted from the exit surface 220 needs to be equal. In one embodiment, the acute angle between the second side transmissive surface 233 and the Y-axis is 75 ° and the acute angle between the second side reflective surface 212 and the Y-axis is 68 °.

Referring back to fig. 3, YZ surface light pattern cd1 is the YZ surface light pattern acquired in the embodiment shown in fig. 4, and YZ surface light pattern cd1 is substantially triangular. Where the divergence angle B3 is about 100 deg., i.e., the lens 200 modulates the divergence angle of the light rays emitted by the light source 120 to a suitable angle. In addition, the curve at the outer edge of the YZ plane light type cd1 is substantially arc-shaped, indicating that the YZ plane light type cd1 has good uniformity.

Referring to fig. 5, the lamp includes, in addition to the lens 200, a lamp panel 110 and a light source 120 parallel to an XY plane, the light source 120 is fixedly connected to the lamp panel 110 and is placed in an incident groove 230 of the lens 200, and the lens 200 is fixedly connected to the lamp panel 110.

In one embodiment, the light sources 120 are LED lamps, the light sources 120 are arranged in parallel along the Y-axis direction, and the divergence angle of the lamp on the YZ plane is relatively large, so that the three light sources 120 are arranged in parallel along the Y-axis direction, which is beneficial to enhancing the illumination intensity in the Y-axis direction. The number of the light sources 120 arranged in parallel in the Y-axis direction may be four, five, or more as the divergence angle of the YZ plane increases.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A lens, characterized by comprising an incident groove, an emergent surface and a reflecting surface, wherein the incident groove and the emergent surface are positioned at two opposite ends of the Z axis of the lens, the reflecting surface is positioned at the side surface of the lens, the emergent surface comprises a flat transparent surface and an oblique transparent surface, the oblique transparent surface is parallel to the Y axis, the flat transparent surface is parallel to the X axis and the Y axis simultaneously, and the ratio of the projection area of the oblique transparent surface on the XY plane to the area of the flat transparent surface is 1/3-1/1.

2. The lens according to claim 1, wherein the exit surface comprises a plurality of the oblique transmission surfaces and a connection surface connecting adjacent ones of the flat transmission surfaces or oblique transmission surfaces, the connection surface being perpendicular to the flat transmission surfaces, and the plurality of oblique transmission surfaces and the connection surface being alternately arranged in a zigzag shape.

3. The lens of claim 1, wherein the flat surface is located on a side of the oblique surface with respect to the positive X-axis direction, a normal line of the oblique surface is directed to a side outside the lens, and an angle between the normal line of the oblique surface and the positive X-axis direction is an obtuse angle.

4. The lens of claim 3, wherein the normal to the oblique-power surface is at an angle of 100 ° -130 ° to the positive direction of the X-axis.

5. The lens of claim 1 wherein the reflective surface comprises a first side opposite surface parallel to the Y axis, the first side opposite surface being parabolic, the entrance slot comprises a front transparent surface parallel to the Y axis and a first side transparent surface, the front transparent surface facing the exit surface, the first side transparent surface being located at a side of the entrance slot.

6. The lens of claim 5, wherein the front face comprises a curved surface that is convex into the entrance groove.

7. The lens of claim 1, wherein the reflective surface comprises a second opposite side surface parallel to the X axis and opposite to the X axis, the incident groove comprises a second opposite side surface parallel to the X axis and opposite to the X axis, the second side surface is located on a side surface of the incident groove, and the opposite second side surface gradually gets closer and the opposite second opposite side surface gradually gets farther from the opening to the bottom of the incident groove.

8. The lens of claim 7, wherein the acute angle between the second lateral transmitting surface and the Y-axis is 75 ° and the acute angle between the second lateral opposing surface and the Y-axis is 68 °.

9. A lamp, characterized in that, includes light source, lamp plate, and according to any one of claims 1-8 the lens, the light source is fixed connection on the lamp plate, and put in the incident groove of the lens, the lens fixed connection is on the lamp plate.

10. The luminaire of claim 9, wherein the light source is an LED lamp, and a plurality of the light sources are arranged side-by-side along the Y-axis.