CN214405923U

CN214405923U - Polarizing lens and LED blackboard lamp

Info

Publication number: CN214405923U
Application number: CN202120219781.9U
Authority: CN
Inventors: 李锦昆; 康福生
Original assignee: Xiamen Topstar Lighting Co Ltd
Current assignee: Xiamen Topstar Lighting Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-10-15
Anticipated expiration: 2031-01-26

Abstract

The utility model discloses a polarizing lens, which comprises a body; one side of the body is concave to form a groove, and the bottom of the groove forms an incident surface; the body other end forms the exit face, and the exit face includes the inconsistent exit cambered surface of a plurality of radians, and each exit cambered surface sets up by southwest direction northeast slope, passes through the step transition between the adjacent exit cambered surface. The utility model discloses still disclose a LED blackboard lamp. Wherein, the lamp pearl can be located the groove opening, because the exit face includes the inconsistent exit cambered surface of a plurality of radians, each exit cambered surface is set up by southwest direction to northeast direction slope, and the light that the lamp pearl sent is through the incident face entering body after, through a plurality of exit cambered surface outputs to with the different positions of light refraction to blackboard, thereby improve the degree of consistency. Therefore, the utility model discloses a polarized lens can change the direction of illumination of light to make light shine to the blackboard, realize closely installing, prevent that light emitting area direct irradiation mr, thereby reduce the glare.

Description

Polarizing lens and LED blackboard lamp

Technical Field

The utility model relates to the field of lighting technology, in particular to polarizing lens and LED blackboard lamp.

Background

The traditional classroom blackboard lamp generally uses a T8 lamp tube and a reflector for light distribution, or uses a T8 lamp tube and a light-transmitting cover for light distribution, and then the blackboard lamp is arranged at the oblique upper position of a blackboard. However, the light emitted from the conventional blackboard lamp partially irradiates the eyes of a person, and glare is generated to affect the eyesight of the person.

With the rise of the LED lamp, the LED lamp is generally used to replace the T8 lamp tube, but because the LED lamp generally has factors such as directional light emission, point light emission and easy glare, the LED blackboard lamp is not uniform in illumination, glare is glaring, and polarized illumination is not improved.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the above-mentioned technology to a certain extent. Therefore, an object of the present invention is to provide a polarized lens, which can change the irradiation direction of light, so that the light irradiates the blackboard, thereby achieving a close-range installation, preventing the light-emitting surface from directly irradiating the teacher, and reducing glare.

A second object of the utility model is to provide a LED blackboard lamp, including polarized lens, polarized lens can change the direction of illumination of light to make light shine to the blackboard, realize closely installing, prevent that light emitting area directly from shining the mr, thereby reduce the glare.

In order to achieve the above object, an embodiment of an aspect of the present invention provides a polarized lens, including a body;

one side of the body is concave to form a groove, and the bottom of the groove forms an incident surface; the body other end forms the exit face, and the exit face includes the inconsistent exit cambered surface of a plurality of radians, and each exit cambered surface sets up by southwest direction northeast slope, passes through the step transition between the adjacent exit cambered surface.

According to the utility model discloses a polarized lens, lamp pearl can be located the recess notch, because the outgoing surface includes the inconsistent outgoing cambered surface of a plurality of radians, each outgoing cambered surface is set up by southwest direction to northeast direction slope, and the light that the lamp pearl sent is through a plurality of outgoing cambered surface outputs after the incident surface gets into the body to with the different positions of light refraction to blackboard, thereby improve the degree of consistency, consequently, the utility model discloses a polarized lens can change the direction of illumination of light, so that light shines to the blackboard, realizes closely installing, prevents that the light emitting area from directly shining mr, thereby reduces the glare.

In addition, according to the present invention, the polarized lens provided in the above embodiment may further have the following additional technical features:

furthermore, the incidence surface is a quasi-straight TIR optical surface, so that when the light enters the body, the light is in a parallel state.

Further, the emergence cambered surface includes first emergence cambered surface, second emergence cambered surface and third emergence cambered surface, and the gradient of first emergence cambered surface is greater than the gradient of second emergence cambered surface, and the gradient of second emergence cambered surface is greater than the gradient of third emergence cambered surface.

Further, the step includes first vertical face, inclined plane and the vertical face of second, and first vertical face one end and one of them emergence cambered surface are connected, and the first vertical face other end is connected to inclined plane one end, and partial light is through the inclined plane refraction, and the inclined plane other end is connected to the vertical face one end of second, and another emergence cambered surface is connected to the vertical face other end of second.

In order to achieve the above object, an embodiment of a second aspect of the present invention provides an LED blackboard lamp, including the above polarized lens and the light source board; the light source plate is provided with a lamp bead, and the lamp bead is positioned on a groove notch of the polarizing lens and comprises the polarizing lens;

according to the utility model discloses a LED blackboard lamp, lamp pearl can be located the groove notch, because the outgoing surface includes the inconsistent outgoing cambered surface of a plurality of radians, and each outgoing cambered surface is set up by southwest direction to northeast direction slope, and the light that the lamp pearl sent is through a plurality of outgoing cambered surface outputs after the incident surface gets into the body to with the different positions of light refraction to blackboard, thereby improve the degree of consistency, consequently, the utility model discloses a polarizing lens can change the direction of shining of light, so that light shines the blackboard, realizes closely installing, prevents that the light emitting area from directly shining the mr to reduce the glare.

Drawings

Fig. 1 is a schematic structural diagram of a polarized lens according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of fig. 1.

Description of the reference symbols

Groove 11 of body 1

Incident surface 12 and exit surface 13

Exit arc 131 first exit arc 1311

Second exit cambered surface 1312 third exit cambered surface 1313

First vertical surface 141 of step 14

Inclined surface 142 and second vertical surface 143

Light source board 2 lamp pearl 21.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like 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 drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 and fig. 2, a polarized lens according to an embodiment of the present invention includes a body 1; one side of the body 1 is concave to form a groove 11, and the bottom of the groove 11 forms an incident surface 12; the other end of body 1 forms emitting surface 13, and emitting surface 13 includes the inconsistent emitting cambered surface 131 of a plurality of radians, and each emitting cambered surface 131 sets up to northeast slope by the southwest direction, passes through step 14 transition between the adjacent emitting cambered surface 131.

Wherein, the lamp pearl 21 of light source board 2 can be located 11 notches of recess, because the emitting surface 13 includes the inconsistent emergence cambered surface 131 of a plurality of radians, each emergence cambered surface 131 is set up by southwest direction to northeast direction slope, and the light that lamp pearl 21 sent is through the 12 back of entering body of incident surface, through a plurality of emergence cambered surfaces 131 outputs to with the different positions of light refraction to blackboard, thereby improve the degree of consistency, consequently, the utility model discloses a polarizing lens can change the direction of illumination of light, so that light shines the blackboard, realizes closely installing, prevents that the light emitting area from directly shining mr, thereby reduces the glare.

Optionally, the entrance surface 12 is preferably a collimating TIR optical surface, so that when light enters the body 1, the light is parallel. The collimating TIR optical surface is a curved surface for refracting a point light source into a parallel light source, and is a prior art and is not described herein.

As an example, the exit arc 131 includes a first exit arc 1311, a second exit arc 1312, and a third exit arc 1313, where an inclination of the first exit arc 1311 is greater than an inclination of the second exit arc 1312, and an inclination of the second exit arc 1312 is greater than an inclination of the third exit arc 1313, so that the light irradiates the upper portion of the blackboard through the first exit arc 1311, the light irradiates the middle portion of the blackboard through the second exit arc 1312, and the light irradiates the lower portion of the blackboard through the third exit arc 1313.

In some examples, the step 14 includes a first vertical surface 141, a slope 142, and a second vertical surface 143, the first vertical surface 141 is connected to one of the exit arc surfaces 131 at one end, the slope 142 is connected to the other end of the first vertical surface 141 at one end, a part of the light is refracted through the slope 142, the second vertical surface 143 is connected to the other end of the slope 142 at one end, and the second vertical surface 143 is connected to the other exit arc surface 131 at the other end.

That is, part of the light can be refracted through the inclined surface 142 to form a transition, so that the light irradiated onto the blackboard is prevented from being locally too bright, and the uniformity of the light is further improved.

The embodiment of the utility model also provides a LED blackboard lamp, which comprises the polarizing lens and the light source plate 2; set up lamp pearl 21 on light source board 2, lamp pearl 21 is located polarizing lens's 11 notches of recess.

The blackboard lamp using the polarized lens is tested in a standard classroom space with a blackboard size of 4 × 1.2m, and the following data are obtained, and are shown in table 1.

Table 1

As can be seen from table 1, when the blackboard lamp is closer to the horizontal blackboard surface and the upper edge of the blackboard, the average illumination is higher, and the uniformity of the vertical blackboard surface is more uniform. Therefore, the utility model discloses can realize the installation of nearer distance to prevent light emitting area direct irradiation mr, reduce the glare.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A polarizing lens, characterized in that: comprises a body;

2. The polarizing lens of claim 1, wherein: the incidence surface is a quasi-straight TIR optical surface, so that the light rays are in a parallel state when entering the body.

3. The polarizing lens of claim 1, wherein: the emergent cambered surface comprises a first emergent cambered surface, a second emergent cambered surface and a third emergent cambered surface, the gradient of the first emergent cambered surface is greater than that of the second emergent cambered surface, and the gradient of the second emergent cambered surface is greater than that of the third emergent cambered surface.

4. The polarizing lens of claim 1, wherein: the step includes first vertical face, inclined plane and the vertical face of second, and first vertical face one end and one of them emergence cambered surface are connected, and the first vertical face other end is connected to inclined plane one end, and partial light is through the inclined plane refraction, and the inclined plane other end is connected to the vertical face one end of second, and another emergence cambered surface is connected to the vertical face other end of second.

5. The utility model provides a LED blackboard lamp which characterized in that: comprising the polarizing lens of any one of claims 1 to 4 and a light source plate; set up the lamp pearl on the light source board, the lamp pearl is located polarizing lens's groove notch.