CN105351822B

CN105351822B - LED blackboard lamp

Info

Publication number: CN105351822B
Application number: CN201510793688.8A
Authority: CN
Inventors: 黄芳
Original assignee: Leeleds Lighting Xiamen Co Ltd
Current assignee: Leeleds Lighting Xiamen Co Ltd
Priority date: 2015-11-18
Filing date: 2015-11-18
Publication date: 2020-01-14
Anticipated expiration: 2035-11-18
Also published as: CN105351822A

Abstract

The utility model provides a LED blackboard lamp, be used for shining blackboard or wall body, including LED light source board and the lens hood that is equipped with the LED light source, this lens hood is shell structure, the height that highly is higher than waiting to shine blackboard or wall body that this lens hood set up, the one end setting of this lens hood is around this LED light source board, the other end of this lens hood is the light-emitting window, this light-emitting window is towards this blackboard or wall body setting, this lens hood is including the interior plate that is close to one side setting of this blackboard or wall body and the exterior panel that one side of keeping away from this blackboard or wall body set up, the inner wall of this exterior panel is used for towards this blackboard or wall body reflection the light of this blackboard or wall body below of orientation that the LED light source sent. The LED blackboard lamp is high in light utilization efficiency and can effectively prevent glare.

Description

LED blackboard lamp

Technical Field

The invention relates to the field of LED illumination, in particular to an LED blackboard lamp.

Background

The blackboard is very common in teaching activities, and can be used by teachers to write teaching contents. The application environment of blackboard is very various, under the environment that some light is not good, can use the blackboard lamp to increase the luminance of blackboard, however if the blackboard lamp shines the light on the blackboard inhomogeneous, then can influence the visual condition of blackboard content to arouse viewer's visual fatigue easily. In order to solve the problem, a better blackboard lamp or a better illumination design is especially important for the blackboard by requiring the blackboard lamp to have a better installation position, an irradiation angle and a reasonable light distribution mode. The traditional blackboard lamp generally only uses two fluorescent tubes, and the blackboard lamp is installed in the position above the blackboard in an inclined manner, the light emitted by the blackboard lamp partially penetrates the eyes of a person directly, glare is generated to influence the vision of the person, the blackboard lamp is closer to the upper part of the blackboard and farther from the lower part of the blackboard, the illumination on the surface of the blackboard from top to bottom is attenuated gradually, the average illumination value on the surface of the blackboard is lower, and the defects of poor illumination uniformity, poor direction controllability and low light utilization rate of the existing blackboard lamp exist.

Disclosure of Invention

In view of the above, it is desirable to provide an LED blackboard lamp with high light utilization efficiency and effective anti-glare property.

The technical scheme adopted by the invention is as follows: the utility model provides a LED blackboard lamp, be used for shining blackboard or wall body, including LED light source board and the lens hood that is equipped with the LED light source, this lens hood is shell structure, the height that highly is higher than waiting to shine blackboard or wall body that this lens hood set up, the one end setting of this lens hood is around this LED light source board, the other end of this lens hood is the light-emitting window, this light-emitting window is towards this blackboard or wall body setting, this lens hood is including the interior plate that is close to one side setting of this blackboard or wall body and the exterior panel that one side of keeping away from this blackboard or wall body set up, the inner wall of this exterior panel is used for towards this blackboard or wall body reflection the light of this blackboard or wall body below of orientation that the LED light source sent.

Compared with the prior art, the LED blackboard lamp is particularly provided with the light shield, on one hand, the outer side plate of the light shield can reflect light which is originally emitted to the lower part of the blackboard or the wall body and cannot play a role of illumination to the blackboard or the wall body, and the utilization efficiency of the light is improved; on the other hand, the light outlet of the light shield is arranged towards the blackboard or the wall body, so that light rays below the LED blackboard lamp can be shielded when a person stands in front of the blackboard or the wall body, the light rays emitted by the LED light sources and facing the lower part of the blackboard or the wall body are reflected and then irradiate to a required position, the light rays are prevented from directly irradiating human eyes to generate glare, and the protection effect on the human eyes is achieved.

Drawings

Fig. 1 is an exploded perspective view of an LED blackboard lamp according to a first embodiment of the present invention.

Figure 2 is another exploded view of the LED blackboard lamp shown in figure 1.

Fig. 3 is a front view of a lens in the LED blackboard lamp shown in fig. 1.

Fig. 4 is a light path diagram of a lens in the LED blackboard lamp shown in fig. 3.

Fig. 5 is a schematic view of the installation of the LED blackboard lamp illuminating blackboard or wall according to the first embodiment of the present invention.

Description of reference numerals:

100 LED blackboard lamp 200 blackboard or wall

10 LED light source board 20 lens hood

30 lens 11 LED light source

21 light outlet 22 inner measuring board

23 outer panel 24 left side wall

25 right sidewall 31 light incident surface

32 a first side of the light-emitting surface 33

34 second side 35 light-entering side

Detailed Description

Fig. 1 is an exploded perspective view of an LED blackboard lamp 100 according to a first embodiment of the present invention, which is used for illuminating a blackboard or a wall 200, and includes an LED light source board 10 provided with an LED light source 11 and a light shielding cover 20, where the light shielding cover 20 is a housing structure, and the light shielding cover 20 is higher than the blackboard or the wall 200 to be illuminated. The blackboard or wall 200 may also be other walls, such as wall-mounted wall paintings or artworks.

Referring to fig. 1, 2 and 5, one end of the light shielding cover 20 is disposed around the LED light source board 10, the other end of the light shielding cover 20 is a light outlet 21, the light outlet 21 is disposed toward the blackboard or the wall 200, the light shielding cover 20 includes an inner side plate 22 disposed near one side of the blackboard or the wall 200 and an outer side plate 23 disposed far from one side of the blackboard or the wall 200, and an inner wall of the outer side plate 23 is used for reflecting light emitted by the LED light sources 11 toward the lower side of the blackboard or the wall 200 toward the blackboard or the wall 200. Preferably, the inner wall of the outer panel 23 is used for reflecting the light emitted by the LED light sources 11 toward the bottom of the blackboard or wall 200 and toward the lower side of the blackboard or wall 200. Because the bottom of the blackboard or wall body 200 is farthest away from the LED blackboard lamp 100, the light distribution is less, and the light at the bottom of the reinforcement enables the overall light distribution on the blackboard or wall body 200 to be irradiated to be more uniform. The outer panel 23 is a curved structure, and the bottom of the outer panel 23 is inclined toward the blackboard or the wall 200 to prevent glare when a person stands under the blackboard lamp 100. The height of the bottom of the inner plate 22 is higher than that of the bottom of the outer plate 23, so that the light outlet 21 is obliquely arranged toward the blackboard or wall 200. The light shield 20 further includes a left side wall 24 and a right side wall 25, and the left side wall 24, the inner side plate 22, the right side wall 25 and the outer side plate 23 are connected to each other so that the light shield 20 forms a cylindrical housing structure. The light shield 20 is internally provided with at least one anti-glare sheet 26, the anti-glare sheets 26 are arranged along the light emitting direction of the LED light sources 11 to divide the light shield 20 into more than two spaces, and the anti-glare sheets 26 are used for further dividing the LED light sources 11 to further prevent glare.

Referring to fig. 1 to 4, the light source module further includes a lens 30, the lens 30 includes a light incident surface 31 at the top and a light emitting surface 32 at the bottom, the light incident surface 31 is disposed obliquely relative to the LED light source board 10, and the light incident surface 31 and the light emitting surface 32 are matched with each other to refract light toward the blackboard or the wall 200. The light incident surface 31 is a cambered surface structure protruding toward the LED light source plate 10, and a concave portion 311 is disposed in the middle of the light incident surface 31 to deflect light toward the light emitting surface 32. The lens 30 further includes a first side surface 33 and a second side surface 34 located at two sides of the light emitting surface 32, the inclination of the first side surface 33 is greater than that of the second side surface 34, and the first side surface 33 and the second side surface 34 are mutually matched to reflect the light emitted by the LED light sources 11 toward the blackboard or the wall 200. The two sides of the light incident surface 31 are respectively connected with a light incident side surface 35, the light incident side surface 35 is perpendicular to the LED light source plate 10, the light incident side surface 35 and the light incident surface 31 form a cavity for accommodating the LED light sources 11, and the light incident side surface 35 is used for refracting light toward the first side surface 33 or the second side surface 34.

In this embodiment, the LED light source plate 10 is a continuous strip-shaped structure, the LED light source plate 10 is provided with a plurality of LED light sources 11 at intervals along the length direction thereof, the lens 20 is a strip-shaped structure disposed corresponding to the LED light source plate 10, and the cross section of the lens 20 has the same shape in the length direction of the LED light source plate 10.

In summary, the LED blackboard lamp 100 is particularly provided with the light shield 20, on one hand, the outer panel 23 of the light shield 20 can reflect light to the lower part of the blackboard or the wall 200 to supplement light to the lower part of the blackboard or the wall 200, which is helpful for compensating the phenomenon that the lower part of the blackboard or the wall 200 has a lower illumination value, improving the uniformity of the illumination of the whole blackboard or the wall 200, and ensuring the uniformity of the illumination of the blackboard or the wall 200; on the other hand, the light outlet 21 of the light shield 20 is disposed facing the blackboard or wall 200, so as to shield the light rays below the LED blackboard lamp 100 when a person stands in front of the blackboard or wall 200, and the light rays emitted by the LED light sources 11 and facing the lower part of the blackboard or wall 200 are reflected and then irradiated to a desired position, so as to prevent the light rays from directly irradiating human eyes to generate glare, thereby protecting the human eyes.

In addition, this LED blackboard lamp 100 still is provided with lens 30, and this lens 30 can form the polarisation effect after refracting or reflecting the light that these LED light sources sent, consequently, utilizes this lens 30 can realize the skew of light intensity distribution for more distribution of light is in the lower half of this blackboard or wall body 200, has improved the utilization ratio of light, has further guaranteed the illuminance uniformity degree of this blackboard or wall body 200.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any person skilled in the art may make modifications to the equivalent embodiment without departing from the scope of the present invention. However, any modification, equivalent replacement, improvement and the like of the above embodiments according to the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a LED blackboard lamp for shine blackboard or wall body, including LED light source board and the lens hood that is equipped with the LED light source, this lens hood is shell structure, and the height that highly is higher than waiting to shine blackboard or wall body that this lens hood set up, its characterized in that: one end of the light shield is arranged around the LED light source plate, the other end of the light shield is a light outlet, the light outlet is arranged towards the blackboard or the wall body, the light shield comprises an inner side plate arranged close to one side of the blackboard or the wall body and an outer side plate arranged far away from one side of the blackboard or the wall body, the inner wall of the outer side plate is used for reflecting light rays emitted by the LED light source and facing to the lower part of the blackboard or the wall body towards the blackboard or the wall body, the outer side plate is of a curved surface structure, the bottom of the outer side plate inclines towards the direction close to the blackboard or the wall body, and the bottom of the inner side plate is higher than the bottom of the outer side plate, so that the light outlet is arranged towards the blackboard or the wall body in an inclined manner; the LED light source board comprises a light source board and a light incoming surface, the light incoming surface is arranged obliquely relative to the LED light source board and comprises a top light incoming surface and a bottom light outgoing surface, the light incoming surface and the light outgoing surface are matched with each other and used for refracting light rays towards the blackboard or the wall body, the light incoming surface is of a cambered surface structure protruding towards the LED light source board, and a concave part is arranged in the middle of the light incoming surface.

2. The LED blackboard lamp according to claim 1, characterized in that: at least one anti-dazzle piece is arranged in the light shield and is arranged along the light emitting direction of the LED light source to divide the light shield into more than two spaces.

3. The LED blackboard lamp according to claim 1, characterized in that: the lens also comprises a first side surface and a second side surface which are positioned on two sides of the light emergent surface, the gradient of the first side surface is greater than that of the second side surface, and the first side surface and the second side surface are mutually matched and used for reflecting the light rays emitted by the LED light source towards the blackboard or the wall body.

4. The LED blackboard lamp of claim 3, characterized in that: the LED light source plate comprises a light incident surface and a light incident side surface, wherein the light incident surface is connected with the two sides of the light incident surface respectively, the light incident side surface is perpendicular to the LED light source plate, a cavity for accommodating the LED light source is formed by the light incident side surface and the light incident surface, and the light incident side surface is used for refracting light towards the first side surface or the second side surface.

5. The LED blackboard lamp according to claim 1, characterized in that: the LED light source plate is of a continuous strip-shaped structure, a plurality of LED light sources are arranged on the LED light source plate at intervals along the length direction of the LED light source plate, the lens is of a strip-shaped structure corresponding to the LED light source plate, and the shape of the cross section of the lens is the same in the length direction of the LED light source plate.

6. The LED blackboard lamp according to claim 1, characterized in that: the light shield also comprises a left side wall and a right side wall, and the left side wall, the inner side plate, the right side wall and the outer side plate are mutually connected to form a cylindrical shell structure.

7. The LED blackboard lamp according to claim 1, characterized in that: the inner wall of the outer side plate is used for reflecting light rays emitted by the LED light source and facing the lower part of the blackboard or the wall body towards the bottom of the blackboard or the wall body.