CN216408664U - Light guide element and lamp - Google Patents

Abstract

The application provides a light guide element and a lamp, wherein a light emitting surface of the light guide element comprises a first convex lens area and a prism area, the first convex lens area is provided with a plurality of convex lenses which are arranged in an array manner, and the convex lenses are configured to deflect part of light rays incident into the light guide element to the outside of the light guide element in the direction far away from a light incident surface so as to form first light rays; the prism area is provided with a plurality of prisms which are arranged in an array, and the prisms are configured to deflect part of light rays which are incident into the light guide element to the outside of the light guide element in the direction far away from the light incident surface so as to form second light rays; the included angle between the second light and the first plane is larger than that between the first light and the first plane, and the first plane is a plane perpendicular to the optical axis of the light source. The light guide element provided by the application can improve the uniformity of illumination of a lamp on a desktop.

Description

Light guide element and lamp

Technical Field

The application relates to the technical field of light guide elements, in particular to a light guide element and a lamp.

Background

A desk lamp is a lamp generally placed on a desk to intensively irradiate light on the desk so as to facilitate reading, learning, working and the like of a user.

A desk lamp in the related art includes a lamp holder, where the lamp holder includes a light guide element, a light source disposed in a lateral direction of the light guide element, and a diffusion plate disposed in a light exit side of the light guide element. When the desk is in operation, light emitted by the light source enters the light guide element and is emitted from the light emitting side of the light guide element, and the light is diffused by the diffusion plate and then irradiated onto the desk top.

SUMMERY OF THE UTILITY MODEL

The inventors of the present application have realized that: in the related art, the diffusion plate has an effect of diffusing light emitted by the light guide element all around, but the ability of diffusing all around decreases with an increase in an included angle with a normal direction of a light emitting surface of the light guide element, so that the illuminance of a central area below the lamp cap is large, and the illuminance of a peripheral area located in the central area is small, thereby resulting in poor illumination uniformity in a certain area on a desktop, and reducing the use experience of a user.

An object of the embodiment of the present application is to provide a light guide element and a lamp, which are used for solving the problem of poor illumination uniformity of a lamp in the related art.

The basic idea proposed by the inventor of the present application is: a convex lens area and a prism area are arranged on the light-emitting surface of the light guide element, and light rays are deflected to different areas on the irradiated surface through the convex lens area and the prism area, so that the illumination uniformity on the irradiated surface is improved.

Based on the foregoing basic concept, in a first aspect, an embodiment of the present application provides a light guide element, including a light exit surface, a back surface, and a light entrance surface, where the back surface is opposite to the light exit surface; the light incident surface is connected between the light emergent surface and the back surface and is configured to receive light rays emitted by the light source; the light emitting surface comprises a first convex lens area and a prism area, the first convex lens area is provided with a plurality of convex lenses which are arranged in an array manner, and the convex lenses are configured to deflect part of light rays entering the light guide element to the outside of the light guide element in the direction far away from the light entering surface so as to form first light rays; the prism area is provided with a plurality of prisms arranged in an array, and the prisms are configured to deflect part of light rays incident into the light guide element to the outside of the light guide element in the direction far away from the light incident surface so as to form second light rays; the included angle between the second light and the first plane is larger than that between the first light and the first plane, and the first plane is perpendicular to the plane of the optical axis of the light source.

By adopting the technical scheme, the plurality of convex lenses in the first convex lens area can deflect the entering light to the central area of the irradiated surface (such as a table top) below the lamp cap; the plurality of prisms in the prism area can deflect the light emitted to the prism area from the inside of the light guide element to the peripheral area below the lamp cap and positioned outside the central area, so that the illumination of the peripheral area far away from the lamp cap can be greatly increased, the too small illumination of the peripheral area below the lamp cap can be avoided, and the illumination uniformity of an irradiated surface can be favorably improved.

In some embodiments, each of the prisms includes a first prism face and a second prism face, and the second prism face is located on a side of the first prism face away from the light incident face along the extending direction of the optical axis; the included angle between the first prism surface and the first plane is larger than that between the second prism surface and the first plane.

By adopting the technical scheme, most light can be deflected to the peripheral area of the irradiated surface, and a small part of light can be deflected to the central area of the irradiated surface, so that the illumination uniformity of the irradiated surface can be further improved.

In some embodiments, in the prism region, the prisms are arranged along an extending direction of the optical axis, and the heights of the prisms are gradually increased along a direction away from the light incident surface.

By adopting the technical scheme, the problem of uneven light output of the prism at different positions of the light incident surface of the light guide element can be compensated, so that the illumination of the peripheral area of the irradiated surface is more uniform.

In some embodiments, along the extending direction of the optical axis, the prism region is located on a side of the first convex lens region away from the light incident surface.

By adopting the technical scheme, the convex lenses and the prisms can be prevented from being distributed in the same area in a staggered mode, so that the light emitting surface of the light guide element is tidier, and the convex lenses in the first convex lens area and the prisms in the prism area can be manufactured conveniently.

In some embodiments, the light emitting surface further includes a second convex lens region, and a plurality of convex lenses arranged in an array are disposed in the second convex lens region; and along the extending direction of the optical axis, the second convex lens area is positioned at one side of the prism area far away from the light incident surface.

By adopting the technical scheme, the second convex lens area can be brighter visually. Meanwhile, the convex lens in the second convex lens area can also converge the light in the light guide element into the central area of the irradiated surface, so that the illumination in the central area of the irradiated surface can be adjusted, and the uniformity of illumination on the irradiated surface is further improved.

In some embodiments, along the extending direction of the optical axis, the prism region has a width d1, the first convex lens region has a width d2, and the widths d1 and d2 satisfy: d1/d2 is more than or equal to 2.

By adopting the technical scheme, the illumination difference of the central area and the peripheral area of the irradiated surface is smaller, so that the illumination uniformity of the irradiated surface is further improved.

In some embodiments, the light guide element is in a circular plate shape, the light exit surface and the back surface are two end surfaces of the light guide element along a thickness direction, respectively, and the light entrance surface is a circumferential surface of the light guide element; the prism area is in a ring shape or a circular shape, and the first convex lens area is in a ring shape and is located on the periphery of the prism area.

By adopting the technical scheme, the processing and manufacturing of the light guide element can be facilitated, so that the manufacturing cost of the light guide element is reduced.

In some embodiments, the light guide element is in a shape of a strip plate, the light exit surface and the back surface are two end surfaces of the light guide element along a thickness direction, respectively, and the light entrance surface is one end surface of the light guide element along a width direction; the light incident surfaces comprise a first light incident surface and a V-shaped second light incident surface connected with the first light incident surface, and the second light incident surface is arranged to protrude out of the first light incident surface; the first convex lens area and each prism in the prism area are strip-shaped and extend along the direction of the contour line of the first light incident surface and the second light incident surface.

By adopting the technical scheme, the light guide element can deflect the light emitted by the light source into the fan-shaped area in front of the lamp, so that the width of the light emitted by the lamp cap of the lamp covering the irradiated surface is greatly increased.

In some embodiments, a V-shaped notch is formed in one side edge of the light guide element in the width direction, and the second light incident surface is an inner wall of the notch.

By adopting the technical scheme, the occupied space of the light guide element is smaller, so that the volume of the lamp holder is favorably reduced.

In a second aspect, an embodiment of the present application provides a lamp, including a housing, the light guide element described in the first aspect, and a light source, where the light guide element is disposed on the housing; the light source is arranged opposite to the light incident surface of the light guide element.

Since the light guide element provided in the first aspect is adopted in the lamp, the lamp also has the technical effect corresponding to the light guide element, which is not described herein again.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view of a lamp head structure of a lamp according to some embodiments of the present disclosure;

fig. 2 is an exploded view of the structure of the lamp cap of fig. 1;

FIG. 3 is a top view of the lamphead of FIG. 1 with the rear cover removed;

FIG. 4 is a partial view of FIG. 3;

FIG. 5 is a bottom view of the lamp head of FIG. 1;

FIG. 6 is a light path diagram of the lamp head of FIG. 1 in operation;

FIG. 7 is a graph showing the relationship between the light emitted from the lamp head of FIG. 1 during operation and the light spots formed on the table;

FIG. 8 is a schematic view illustrating a positional relationship between a lamp head and a table top according to an embodiment of the present application;

FIG. 9a is a cloud of illumination on a table of light emitted by a related art lamp, wherein the shade of the color of the light spot represents the intensity of the light energy;

FIG. 9b is an illuminance cloud of light emitted by the lamphead of FIG. 2 on a table top, wherein the shade of the color of the light spot represents the intensity of the light energy;

FIG. 10 is a detailed block diagram of the prism of FIG. 6;

FIG. 11 is a schematic diagram of structures of convex lenses in a first convex lens region and a second convex lens region of a light guide element according to some embodiments of the present disclosure;

FIG. 12 is a schematic view of a lamp cap of a lamp according to another embodiment of the present application;

fig. 13 is an exploded view of the structure of the lamp cap of fig. 12;

FIG. 14 is a top view of the lamphead of FIG. 12 with the rear cover removed;

FIG. 15 is a partial view of the drawing;

FIG. 16 is a bottom view of the lamp head of FIG. 12;

FIG. 17 is a graph showing the relationship between the light emitted from the lamphead of FIG. 12 during operation and the formation of a light spot on the tabletop;

FIG. 18 is a schematic view of the position relationship between the lamp head and the table top in the embodiment of the present application;

fig. 19 is a schematic view of a lamp cap structure of a lamp according to another embodiment of the present application.

Reference numerals: a light guide element 100; a housing 200; a rear cover 210; a front frame 220; a light source 300; an optical axis 310; an LED lamp 320; a reflective sheet 400; a light mixing plate 500; a central region 610; a peripheral region 620; a lamp cap 700; a light pole 800; a light-emitting surface 1; a first convex lens region 11; a convex lens 12; a prism region 13; a prism 14; a first prism face 141; a second prism face 142; a second convex lens region 15; a back surface 2; a light incident surface 3; a first light incident surface 31; a second light incident surface 32; the first light ray 41; the second light ray 42; a first plane 5; and a notch 6.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it is to be understood that the terms "upper", "lower", "side", "front", "rear", and the like indicate orientations or positional relationships based on installation, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it should be noted that the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.

It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.

As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a lamp cap 700 of a lamp in some embodiments of the present application, fig. 1 does not show a limiting structure of a light guide element along a thickness direction thereof, and fig. 2 is an exploded structural diagram of the lamp cap 700 in fig. 1. The lamp is a table lamp and comprises a fixed seat, a lamp post and a lamp cap 700, wherein the fixed seat is configured to be placed on a table, a connecting rod is connected between the fixed seat and the lamp cap 700, and the lamp cap 700 is configured to emit light to illuminate the table top. The connection rod may be a rod capable of adjusting the position of the lamp cap 700, such as a telescopic rod, a flexible rod, etc.

The lamp cap 700 includes a housing 200, a light guide element 100, a reflective sheet 400 and a light source 300, wherein the housing 200 is circular and includes a front frame 220 and a rear cover 210, and the front frame 220 and the rear cover 210 are detachably fastened together to facilitate the assembly and disassembly of the internal elements of the housing 200.

The light guide element 100 is disposed on the housing 200, for example, as shown in fig. 1, the light guide element 100 is disposed on the front frame 220 and located in the housing 200.

The light guide element 100 includes a light emitting surface 1, a back surface 2, and a light incident surface 3, wherein the back surface 2 is opposite to the light emitting surface 1, and the light incident surface 3 is connected between the light emitting surface 1 and the back surface 2 and configured to receive light emitted from the light source 300.

The light guide element 100 is in a circular plate shape, the light exit surface 1 and the back surface 2 are two end surfaces of the light guide element 100 along the thickness direction H, respectively, and the light entrance surface 3 is a circumferential surface of the light guide element 100.

The material of the light guide element 100 may be PMMA (poly methyl methacrylate; polymethyl methacrylate; also called acrylic), PC (Polycarbonate), glass, or the like.

The light source 300 is disposed in the housing 200 and is opposite to the light incident surface 3 of the light guide element 100, wherein as shown in fig. 3 and 4, fig. 3 is a top view of the lamp cap 700 in fig. 1 with the rear cover 210 removed, and fig. 4 is a partial view of fig. 3. The light source 300 is a lamp strip disposed around the light guide element 100, the lamp strip includes a plurality of LED (light-emitting diode) lamps 320, and the light incident surfaces 3 of the LED lamps 320 are opposite to each other.

Of course, the Light source 300 is not limited to a Light strip, and other types of Light sources can be used, such as an OLED (Organic Light-Emitting Diode).

As shown in fig. 1 and fig. 2, the reflective sheet 400 (also called reflective paper) covers the back surface 2 of the light guide element 100, and the reflective sheet 400 can prevent light leakage from the back side of the light guide element 100, thereby improving the efficiency of the light source 300, and being beneficial to improving the brightness and lumen of the lamp.

As shown in fig. 5 and 6, fig. 5 is a bottom view of the lamp cap 700 in fig. 1, and fig. 6 is a light path diagram of the lamp cap 700 in fig. 1 during operation. The light emitting surface 1 includes a first convex lens region 11 and a prism region 13.

Prism district 13 is the ring shape, and first convex lens district 11 is the ring shape, and is located the periphery in prism district 13, namely: along the extending direction of the optical axis 310 of the light source 300, the prism region 13 is located on the side of the first convex lens region 11 away from the light incident surface 3. Through such arrangement, the convex lenses 12 and the prisms 14 can be prevented from being distributed in the same area in a staggered manner, so that the light emitting surface 1 of the light guide element 100 is neater, and the convex lenses 12 in the first convex lens area 11 and the prisms 14 in the prism area 13 can be conveniently manufactured.

The first convex lens region 11 is provided with a plurality of convex lenses 12 arranged in an array, and the convex lenses 12 are configured to deflect a part of light rays incident into the light guide element 100 to the outside of the light guide element 100 in a direction away from the light incident surface 3 to form first light rays 41.

The prism region 13 is provided with a plurality of prisms 14 arranged in an array, and the prisms 14 are configured to deflect a portion of the light rays incident into the light guide element 100 to the outside of the light guide element 100 in a direction away from the light incident surface 3 to form second light rays 42.

As shown in fig. 6, an included angle θ 2 between the second light ray 42 and the first plane 5 is greater than an included angle θ 1 between the first light ray 41 and the first plane 5, and the first plane 5 is a plane perpendicular to the optical axis 310 of the light source 300. The optical axis 310 of the light source 300 in fig. 6 is the optical axis of the LED lamp 320.

As shown in fig. 6, 7 and 8, fig. 7 is a relationship diagram of light emitted by the lamp head 700 in fig. 1 during operation and a light spot formed on a table top, and fig. 8 is a schematic positional relationship diagram between the lamp head 700 and the table top in the embodiment of the present application. When the lamp works, light emitted by the light source 300 enters the light guide element 100 from the light incident surface 3, and the plurality of convex lenses 12 in the first convex lens region 11 can deflect the entering light to the central region 610 of 0-300 mm below the lamp head 700, that is, the first light 41 is emitted to the central region 610 of 0-300 mm. Because the included angle θ 2 between the second light 42 and the first plane 5 is greater than the included angle θ 1 between the first light 41 and the first plane 5, the plurality of prisms 14 in the prism area 13 can deflect the light emitted from the inside of the light guide element 100 to the prism area 13 to the peripheral area 620 300-500 mm below the lamp cap 700, that is, the second light 42 is emitted to the peripheral area 620 300-500 mm below the lamp cap 700, so that the illuminance of the desktop area far away from the lamp cap 700 can be greatly increased, and therefore, the illuminance of the peripheral area 620 below the lamp cap 700 can be prevented from being too small, thereby being beneficial to improving the uniformity of desktop illumination.

Meanwhile, the light guide element 100 is designed to be in a circular plate shape, the prism region 13 is designed to be in a circular ring shape, and the first convex lens region 11 is designed to be in a circular ring shape and is positioned at the periphery of the prism region 13, so that the processing and manufacturing of the light guide element 100 can be facilitated, and the manufacturing cost of the light guide element 100 can be reduced.

It should be noted that: the central region 610 and the peripheral region 620 on the desktop are formed by projecting the center point of the light guide element 100 on the desktop, as shown in fig. 7, with O1 as the origin point, which is O1.

In some embodiments, as shown in fig. 5 and fig. 6, the light emitting surface 1 further includes a second convex lens region 15, and a plurality of convex lenses 12 arranged in an array are disposed in the second convex lens region 15; the second convex lens region 15 has a circular shape, and the prism region 13 is located at the periphery of the second convex lens region 15. That is, the second convex lens region 15 is located on the side of the prism region 13 away from the light incident surface 3.

Since the second convex lens region 15 is located farther from the light incident surface 3, and the light emitted from the second convex lens region 15 is relatively less, the second convex lens region 15 is darker in vision, and is more obvious particularly when the radius of the light guide element 100 is larger. By providing the convex lens 12 in the second convex lens region 15, the convex lens 12 functions to condense light, so that the second convex lens region 15 is visually brighter. Meanwhile, the convex lens 12 in the second convex lens area 15 can also converge the light in the light guide element 100 to the central area 610 of the desktop of 0-300 mm, so that the illumination in the central area 610 of the desktop can be adjusted, and the uniformity of the illumination on the desktop can be further improved.

Of course, if the radius of the light guide element 100 is relatively small, the second convex lens region 15 may not be provided, and the prism region 13 is circular and located at the center of the light guide element 100.

As shown in fig. 5, the width of the prism region 13 of the light guide element 100 is d1, the width of the first convex lens region 11 is d2, and d1/d2 is an important parameter, which is not suitable for being too small, and if d1/d2 is too small, the area of the first convex lens region 11 is larger, and the area of the prism region 13 is smaller, which is not favorable for further improving the uniformity of the desktop illumination. According to researches, when d1/d2 is larger than or equal to 2, the ratio of the area of the first convex lens area 11 to the area of the prism area 13 is proper, so that the difference of the illumination intensity of a central area 610 of 0-300 mm and a peripheral area 620 of 300-500 mm on a desktop is small, and the illumination uniformity of the desktop is further improved.

In some embodiments, as shown in fig. 6 and 10, fig. 10 is a detailed block diagram of the prism 14 in fig. 6. Each prism 14 comprises a first prism face 141 and a second prism face 142, and the second prism face 142 is located on one side of the first prism face 141 away from the light incident face 3 along the extending direction X of the optical axis 310; the included angle α 1 between the first prism face 141 and the first plane 5 is greater than the included angle α 2 between the second prism face 142 and the first plane 5. Illustratively, α 1 ranges from 40 to 70 °, and α 2 ranges from 0 to 30 °.

Since the second prism face 142 is located on the side of the first prism face 141 away from the light incident face 3, the light emergent direction of the second prism face 142 can be directed away from the light incident face 3 of the light guide element 100 (rightward direction in the figure). Because the included angle α 1 between the first prism surface 141 and the first plane 5 is greater than the included angle α 2 between the second prism surface 142 and the first plane 5, the emitted light from the second prism surface 142 can be emitted to the peripheral area 620 of the desktop with a size of 300-500 mm. The first prism face 141 mainly receives light reflected from the back face 2 of the light guide element 100 (the light is weak in energy), and deflects the light to a central area 610 of the desktop of 0-300 mm.

By setting the prism 14 to the above structure, most of light can be deflected to the peripheral area 620 of 300-500 mm of the desktop, and a small part of light can be deflected to the central area 610 of 0-300 mm of the desktop, so that the uniformity of desktop illumination can be further improved.

Wherein, as shown in fig. 5, each prism 14 may be designed as a ring-shaped strip structure, and the cross section of each prism 14 is as shown in fig. 10.

In some embodiments, as shown in fig. 6, in the prism region 13, the prisms 14 are arranged along the extending direction X of the optical axis 310, and the heights of the prisms 14 are gradually increased along the direction away from the light incident surface 3, that is: the height of the prism 14 farther from the light incident surface 3 is large, and the height of the prism 14 closer to the light incident surface 3 is small.

In the light guide element 100, since the prisms 14 at positions farther from the light incident surface 3 receive relatively less light rays and the prisms 14 at positions closer to the light incident surface 3 receive relatively more light rays, by providing the prisms 14 with a larger height at positions farther from the light incident surface 3, the prism surfaces of the prisms 14 are larger and more light can be deflected out of the light guide element 100; the prisms 14 having a smaller height are arranged closer to the light entry surface 3, so that the smaller prism surface of the prisms 14 is able to deflect relatively less light out of the light guiding element 100. Through the arrangement, the problem that light is not uniformly emitted from the prism 14 at different positions of the light incident surface 3 can be compensated, so that the lighting of the peripheral area 620 with the size of 300-500 mm on the desktop is more uniform.

Wherein, the height of the prism 14 of the prism region 13 can be set to be 0.1-0.25 mm.

Fig. 11 is a schematic structural diagram of the inner convex lenses 12 in the first convex lens region 11 and the second convex lens region 15 of the light guide element 100 according to some embodiments of the present application, as shown in fig. 11. In the first and second convex lens regions 11 and 15, the convex lens 12 is a protrusion having a curved surface, and the convex lens 12 can deflect the light in the light guide element 100 in a direction away from the light incident surface 3 (i.e., in a rightward direction in the drawing), and can converge the dispersed light at the same time as deflecting.

As shown in fig. 11, the curved surface of the convex lens 12 is a spherical surface, but the present invention is not limited thereto, and other aspherical curved surfaces may be used.

The curvature radius of the curved surface of the convex lens 12 may be constant or may vary, and may be designed according to actual needs. By changing the curvature radius of the curved surface of the convex lens 12, the convex lens 12 can be controlled to deflect the light in the light guide element 100 to the central area 610 of 0-300 mm on the desktop.

Illustratively, the curvature radius of the curved surface of the convex lens 12 is in the range of 1 to 6 mm.

In some embodiments, as shown in fig. 8, the light source 300 is located on a side of the light guide element 100 close to the lamp post 800, and the light source 300 is a lamp strip. Thus, the light guide element 100 can deflect the light emitted from the light source 300 on one side of the lamp post 800 to a position in front of the lamp head 700, for example, a sector area in the figure, which is an angle range of ± 60 ° directly in front of the lamp head 700. By arranging the light source 300 in this way, not only can the light energy waste caused by the light emitted by the light source 300 being deflected by the light guide element 100 and then being irradiated to the rear of the lamp cap 700 be avoided, the light energy utilization efficiency of the light source 300 is improved, but also the convenience is brought for a user to read books, work and the like on the desktop in front of the lamp cap 700.

Of course, besides the strip of light being disposed on the side of the light guiding element 100 close to the lamp post 800, if the light source 300 is disposed around the light guiding element 100, the number of the LED lamps 320 disposed on the side of the light guiding element 100 close to the lamp post 800 may be greater than the number of the LED lamps 320 disposed on the side of the light guiding element 100 away from the lamp post 800, or the LED lamps 320 may not be disposed on the side of the light guiding element 100 away from the lamp post 800.

In order to more pictorially explain the optical effect of the lamp in the embodiment of the present application, the following is compared with the illumination cloud chart:

fig. 9a is an illuminance cloud diagram of light emitted by the related art lamp on the table top as shown in fig. 9a, where the shade of the color of the light spot represents the intensity of the light energy, and as can be seen from the cloud diagram in fig. 9a, the light spot on the table top is substantially circular. In the circular area (i.e. the circular area of 0-500 mm), the color of the central area is darker, the color of the peripheral area of the central area is lighter, and the difference between the color depth of the central area and the color depth of the peripheral area is larger, so that the uneven illumination distribution of the lamp on the table top in the related art can be seen.

As shown in fig. 9b, fig. 9b is an illuminance cloud diagram of light emitted by the lamp holder in fig. 2 on a desktop, where the shade of the color of the light spot in the diagram represents the intensity of light energy, and as can be seen from the cloud diagram in fig. 9b, the light spot on the desktop is substantially in a fan shape, and the difference of the shade of the color in the fan-shaped area (i.e., the fan-shaped area of 0-500 mm) is small, so that it can be seen that the lamp in the embodiment of the present application can significantly improve the uniformity of desktop illumination.

As shown in fig. 12 and 13, fig. 12 is a schematic structural diagram of a lamp cap 700 of a lamp in other embodiments of the present application, fig. 12 does not show a limiting structure of the light guiding element 100 along a thickness direction thereof, fig. 13 is an exploded structural diagram of the lamp cap 700 in fig. 12, and the lamp in this embodiment is mainly different from the lamp in the embodiments shown in fig. 1 to 11 in that: the light guide element 100 is shaped differently.

The light guide element 100 is in the form of a strip plate, the light emitting surface 1 and the back surface 2 are two end surfaces of the light guide element 100 along the thickness direction H, respectively, and the light incident surface 3 is one end surface of the light guide element 100 along the width direction W.

The light incident surface 3 includes a first light incident surface 31 and a V-shaped second light incident surface 32 connected to the first light incident surface 31, and the second light incident surface 32 is disposed to protrude from the first light incident surface 31.

One or two first light incident surfaces 31 may be provided, as shown in fig. 13, and the two first light incident surfaces 31 are respectively connected to two sides of the second light incident surface 32. The second light incident surface 32 may be a V-shaped surface formed by two planes connected together, or a V-shaped surface formed by two arc surfaces connected together, which is not limited herein.

As shown in fig. 14 and 15, fig. 14 is a plan view of the base 700 of fig. 12 with the rear cover 210 removed, and fig. 15 is a partial view of fig. 16. The light source 300 is a light strip disposed on one side of the light guide element 100 along the width direction, and extends along the direction of the contour lines of the first incident surface 31 and the second incident surface 32. Specifically, the light strip is disposed on one side of the light guiding element 100 close to the light pole.

As shown in fig. 15 and 16, fig. 16 is a bottom view of the lamp cap 700 of fig. 12. The light emitting surface 1 includes a first convex lens region 11 and a prism region 13, and the prism region 13 is located on a side of the first convex lens region 11 away from the light incident surface 3 along an extending direction of the optical axis 310 of the light source 300. Each prism 14 in the first convex lens region 11 and the prism region 13 is strip-shaped and extends along the direction of the contour lines of the first light incident surface 31 and the second light incident surface 32.

By arranging the prism region 13 on the side of the first convex lens 12 region far from the light incident surface 3, the arrangement makes the light emitting surface 1 of the light guiding element 100 cleaner, thereby facilitating the manufacture of the convex lens 12 in the first convex lens 12 region and the prism 14 in the prism region 13.

Certainly, the arrangement of the prism regions 13 and the first convex lens 12 is not limited to this, for example, the prism regions 13 and the first convex lens 12 may be respectively disposed in a plurality and alternately disposed along the direction of the contour lines of the first incident surface 3 and the second incident surface 3.

As shown in fig. 16, 17 and 18, fig. 17 is a relation diagram of light emitted by the lamp head 700 in fig. 12 during operation and a light spot formed on a table top, and fig. 18 is a schematic position relation diagram of the lamp head 700 and the table top in the embodiment of the present application. When the lamp is in operation, the plurality of convex lenses 12 arranged in the first convex lens region 11 can converge the light entering from the first light incident surface 31 into a rectangular region (a rectangular region a formed by dotted lines in the figure) of 0 to 300mm below the front side of the lamp head 700, and can deflect the light entering from the second light incident surface 32 into fan-shaped regions (a fan-shaped region b shown by dotted lines in the figure) of 0 to 300mm in the directions of the left front and right front of the lamp head 700.

The plurality of prisms 14 in the prism region 13 can deflect the light incident on the light guide element 100 from the first light incident surface 31 to a rectangular region (a rectangular c region formed by dotted lines in the figure) 300 to 500mm below the front side of the base 700, and can deflect the light incident on the light guide element 100 from the second light incident surface 32 to a fan-shaped region (a fan-shaped d shown by a dotted line in the figure) 300 to 500mm in the left-front and right-front directions of the base 700. Therefore, the light guide element 100 can deflect the light emitted by the light source 300 into a fan-shaped area in front of the lamp cap 700, namely, an angle range of ± 60 degrees in front of the lamp cap 700, so that the width of a desktop covered by the light emitted by the lamp cap 700 is greatly increased, and the length and the size of the lamp cap 700 are reduced while the lighting effect is ensured.

It should be noted that: the 0-300 mm rectangular area and the fan-shaped area, and the 300-500 mm rectangular area and the fan-shaped area on the desktop are all formed by using O2 as an origin, and as shown in fig. 18, the origin O2 is formed by projecting the vertex of the outline of the second light incident surface 32 of the light guide element 100 (the vertex of the V-shaped surface) on the desktop.

The forming position of the second light incident surface 32 is not exclusive, and in some embodiments, as shown in fig. 13, a V-shaped notch 6 is formed on one side edge of the light guide element 100 along the width direction W, and the second light incident surface 32 is an inner wall of the notch 6. In other embodiments, a side edge of the light guide element 100 along the width direction W is formed with a V-shaped boss, and the second light incident surface 32 is an outer wall of the boss. Compared with the case that the second light incident surface 32 is arranged as the outer wall of the boss, the second light incident surface 32 is arranged as the inner wall of the notch 6, so that the occupied space of the light guide element 100 is smaller, and the size of the lamp cap 700 is reduced.

As shown in fig. 19, fig. 19 is a schematic view of a lamp cap 700 of a lamp in other embodiments of the present application, where the lamp further includes a light mixing plate 500, and the light mixing plate 500 covers the light emitting surface 1 of the light guiding element 100. The light mixing effect of the table top can be increased by arranging the light mixing plate 500.

The light mixing plate 500 may be a transparent frosted plate, a white diffusion plate, a bead panel, etc., and is not limited herein.

Other structures of the lamp in the embodiments shown in fig. 12 to fig. 19, for example, in the light guide element 100, the structure of the convex lens 12 in the first convex lens region 11, the structure of the prism 14 in the prism region 13, the ratio of the widths of the first convex lens region 11 and the prism region 13, and the like, may specifically refer to the lamp arrangement in the embodiments shown in fig. 1 to fig. 11, and are not described in detail herein.

The lamp in the embodiment of the application is not limited to the table lamp, and can also be other lamps for illuminating the illuminated surface of the target object, and the illuminated surface is not limited to a table top, and can also be a wall surface, a stage surface and the like.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A light directing element, comprising:

a light exit surface (1);

the back surface (2) is arranged opposite to the light-emitting surface (1);

a light incident surface (3) connected between the light emitting surface (1) and the back surface (2) and configured to receive light emitted by a light source (300);

characterized in that, the light-emitting surface (1) includes:

the first convex lens area (11) is provided with a plurality of convex lenses (12) which are arranged in an array mode, the convex lenses (12) are configured to deflect part of light rays entering the light guide element (100) to the outside of the light guide element (100) in the direction far away from the light incident surface (3) so as to form first light rays (41);

the prism area (13) is provided with a plurality of prisms (14) which are arranged in an array, and the prisms (14) are configured to deflect part of light rays entering the light guide element (100) to the outside of the light guide element (100) in the direction away from the light entering surface (3) so as to form second light rays (42); the included angle (theta 2) between the second light (42) and the first plane (5) is larger than the included angle (theta 1) between the first light (41) and the first plane (5), and the first plane (5) is perpendicular to the plane of the optical axis (310) of the light source (300).

2. A light-guiding element as recited in claim 1,

each prism (14) comprises a first prism face (141) and a second prism face (142), and the second prism face (142) is positioned on one side of the first prism face (141) far away from the light incident face (3) along the extension direction (X) of the optical axis (310);

an included angle (alpha 1) between the first prism surface (141) and the first plane (5) is larger than an included angle (alpha 2) between the second prism surface (142) and the first plane (5).

3. A light-guiding element as claimed in claim 2,

in the prism area (13), the prisms (14) are arranged along the extending direction (X) of the optical axis (310), and the height of the prisms (14) is gradually increased along the direction far away from the light incident surface (3).

4. A light-guiding element as claimed in any one of claims 1 to 3,

along the extending direction (X) of optical axis (310), prism district (13) are located keeping away from of first convex lens district (11) one side of going into plain noodles (3).

5. A light-guiding element as claimed in claim 4,

the light emitting surface (1) further comprises a second convex lens area (15), and a plurality of convex lenses (12) arranged in an array are arranged in the second convex lens area (15);

along the extending direction (X) of optical axis (310), second convex lens district (15) are located prism district (13) is kept away from one side of income plain noodles (3).

6. A light-guiding element as claimed in claim 4,

in the extending direction (X) of the optical axis (310), the width of the prism region (13) is d1, the width of the first convex lens region (11) is d2, d1 and d2 satisfy: d1/d2 is more than or equal to 2.

7. A light-guiding element as claimed in claim 4,

the light guide element (100) is in a circular plate shape, the light emitting surface (1) and the back surface (2) are two end surfaces of the light guide element (100) along the thickness direction (H), and the light incident surface (3) is the circumferential surface of the light guide element (100);

the prism area (13) is circular or circular, and the first convex lens area (11) is circular and is located on the periphery of the prism area (13).

8. A light-guiding element as claimed in claim 4,

the light guide element (100) is in a strip plate shape, the light emitting surface (1) and the back surface (2) are two end surfaces of the light guide element (100) along the thickness direction (H), and the light incident surface (3) is one end surface of the light guide element (100) along the width direction (W);

the light incident surface (3) comprises a first light incident surface (31) and a V-shaped second light incident surface (32) connected with the first light incident surface (31), and the second light incident surface (32) protrudes out of the first light incident surface (31);

first convex lens district (11) and every in prism district (13) prism (14) all are the strip, and all follow first income plain noodles (31) the trend of the contour line of second income plain noodles (32) extends.

9. A light-directing element according to claim 8,

the light guide element (100) is provided with a V-shaped notch (6) along one side edge of the width direction (W), and the second light incident surface (32) is the inner wall of the notch (6).

10. A light fixture, comprising:

a housing (200);

the light-guiding element (100) of any one of claims 1 to 9, arranged on the housing (200);

and the light source (300) is arranged opposite to the light incident surface (3) of the light guide element (100).

Images