CN216010517U - Blackboard lamp of anti-dazzle eyeshield - Google Patents
Blackboard lamp of anti-dazzle eyeshield Download PDFInfo
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- CN216010517U CN216010517U CN202121642440.9U CN202121642440U CN216010517U CN 216010517 U CN216010517 U CN 216010517U CN 202121642440 U CN202121642440 U CN 202121642440U CN 216010517 U CN216010517 U CN 216010517U
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- 230000003287 optical effect Effects 0.000 claims abstract description 63
- 230000004313 glare Effects 0.000 claims abstract description 9
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- 238000005286 illumination Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 230000005855 radiation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
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- 230000001678 irradiating effect Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
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Abstract
The utility model discloses an anti-dazzle eye-protection blackboard lamp, which comprises a lamp body, an LED light source, a first optical element, a second optical element and an anti-dazzle baffle, wherein the lamp body is provided with a containing cavity with an opening at the bottom; the anti-dazzle baffle is arranged below the second optical element and is connected with the lamp body positioned on the side, inclined downwards, of the second optical element. The utility model can prevent the glare of teachers and students and protect human eyes.
Description
Technical Field
The utility model relates to the technical field of lighting lamps, in particular to an anti-dazzle and eye-protecting blackboard lamp.
Background
At present, most schools adopt traditional fluorescent tubes as blackboard lamps for lighting, anti-dazzle and eye protection. The traditional fluorescent lamp tube has dazzling light, serious stroboflash, poor display index, high color temperature and poor anti-dazzle effect, the illuminance and the uniformity can not reach the national standard, and particularly, myopia is easily caused by directly irradiating the eyes of teachers and students; in addition, the traditional fluorescent lamp tube is also required to be maintained frequently, which can influence the students to learn normally. Some blackboard lights on the market are provided with grids or surface treatments for anti-glare, but this leads to increased cost and reduced light efficiency.
The LED is called as a fourth-generation light source, has the characteristics of energy conservation, environmental protection, safety, long service life, low power consumption, low heat, high brightness, water resistance, micro size, shock resistance, easiness in dimming, light beam concentration, simplicity and convenience in maintenance and the like, and can be widely applied to the fields of various indications, display, decoration, backlight sources, common illumination and the like.
However, the use of LED light sources as blackboard lights also requires consideration of the problem of glare damaging the teacher's and student's eyes. In order to enable students to clearly read characters on a blackboard and protect the eyesight health of teachers and students, it is necessary to provide an LED blackboard lamp capable of preventing teachers and students from glare.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing an anti-dazzle and eye-protecting blackboard lamp which can prevent dazzling of teachers and students and protect human eyes.
In order to solve the technical problem, the utility model provides an anti-dazzle and eye-protecting blackboard lamp, which comprises a lamp body, an LED light source, a first optical element, a second optical element and an anti-dazzle baffle,
the LED lamp comprises a lamp body, an LED light source, a first optical element, a second optical element and a first optical element, wherein the lamp body is provided with an accommodating cavity with an opening at the bottom;
the anti-dazzle baffle is arranged below the second optical element and is connected with the lamp body positioned on the side, inclined downwards, of the second optical element.
As an improvement of the above, the antiglare shield is rotatable relative to the lamp body.
As an improvement of the above-mentioned scheme, the first optical element is a total reflection lens, and the total reflection lens includes a middle light incident surface, a first light incident side surface disposed on one side of the middle light incident surface, a second light incident side surface disposed on the other side of the middle light incident surface and enclosing with the middle light incident surface and the first light incident side surface to form an accommodating groove for accommodating an LED light source, a first total reflection surface disposed on the outer side of the first light incident side surface and used for totally reflecting the emergent light of the first light incident side surface, a second total reflection surface disposed on the outer side of the second light incident side surface and used for totally reflecting the emergent light of the second light incident side surface, and a light emergent surface disposed on the opposite side of the accommodating groove.
As an improvement of the scheme, the LED light source is arranged in the accommodating groove, and light rays emitted by the LED light source are emitted in parallel after passing through the total reflection lens.
As an improvement of the scheme, a first slot is formed in the top of the accommodating cavity, the LED light source is an LED light bar, and the LED light bar is accommodated in the first slot.
As an improvement of the above scheme, two side walls of the accommodating cavity are provided with second slots oppositely, and two ends of the first optical element are arranged in the second slots;
and the two side walls of the opening of the accommodating cavity are relatively provided with third slots, and the second optical element is arranged in the third slots in a sliding manner.
As a modification of the above, the second optical element is made of a material having a function of diffusing or absorbing blue light.
The implementation of the utility model has the following beneficial effects:
the utility model provides an anti-dazzle eye-protecting blackboard lamp, wherein an anti-dazzle baffle is arranged on a lamp body which is positioned below a second optical element and on one side of the second optical element, which is inclined downwards, so that the condition that light rays directly irradiate the eyes of a teacher to generate glare can be avoided;
the LED light source, the first optical element and the second optical element are all provided with preset inclination angles in the horizontal direction, so that light-emitting polarized light is irradiated on the blackboard, the installation distance between the anti-dazzle eye-protecting blackboard lamp and the blackboard is greatly shortened, on one hand, the light loss is reduced, the illumination uniformity of the surface of the blackboard is improved, on the other hand, the light of the anti-dazzle eye-protecting blackboard lamp is irradiated on the blackboard from a space above the head of a teacher as much as possible, and the glare value is reduced;
in addition, the second optical element is made of materials with the blue light diffusion or absorption functions, blue light in light emitted by the LED light source can be uniformly diffused, the blue light radiation illumination is weakened, and teachers and students are protected from being damaged by the blue light.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of a blackboard lamp for anti-glare and eye protection according to the present invention;
FIG. 2 is a schematic diagram of the path of light from the LED light source of FIG. 1 through a first optical element;
FIG. 3 is a schematic view of the inversion of the antiglare shield of FIG. 1;
fig. 4 is an enlarged schematic structural diagram of the LED light source and the first optical element of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides an embodiment of an anti-glare and eye-protection blackboard lamp, including a lamp body 1, an LED light source 2, a first optical element 3, a second optical element 4, and an anti-glare baffle 5, where the lamp body 1 is provided with an accommodating cavity 11 with an opening at the bottom, the LED light source 2 and the first optical element 3 are arranged in the accommodating cavity 11, the second optical element 4 is arranged at the opening of the accommodating cavity 11, and with reference to fig. 2, the LED light source 2, the first optical element 3, and the second optical element 4 are all provided with a preset inclination angle θ with respect to the horizontal direction, and light emitted by the LED light source 2 sequentially passes through the first optical element 3 and the second optical element 4; the antiglare shield 5 is disposed below the second optical element 4, and is connected to the lamp body 1 on the side where the second optical element 4 is inclined downward.
In the embodiment, the anti-dazzle baffle 5 is arranged on the lamp body 1 which is positioned below the second optical element 4 and on the side of the second optical element 4 inclined downwards, so that the condition that light rays directly irradiate the eyes of a teacher to generate glare can be avoided; the LED light source 2, the first optical element 3 and the second optical element 4 are all provided with a preset inclination angle theta along the horizontal direction, so that emergent light is irradiated on the blackboard, the installation distance between the anti-dazzle eye-protecting blackboard lamp and the blackboard is greatly shortened, on one hand, the light loss is reduced, the illumination uniformity of the surface of the blackboard is improved, on the other hand, the light of the anti-dazzle eye-protecting blackboard lamp is irradiated on the blackboard from the space above the head of a teacher as much as possible, and the dazzle light value is reduced; in addition, the second optical element 4 uniformly diffuses the blue light in the light emitted by the LED light source 2, so that the blue light radiation illumination is weakened, and the eyes of teachers and students are protected from being damaged by the blue light.
Referring to fig. 3, in order to facilitate assembly of the whole lamp, in this embodiment, a first slot 12 is disposed at the top of the accommodating cavity 11, and the LED light source 2 is an LED light bar which is accommodated in the first slot 12. Two opposite side walls of the accommodating cavity 11 are provided with second slots 13, and two ends of the first optical element 3 are arranged in the second slots 13; two side walls of the opening of the accommodating cavity 11 are provided with third slots 14 oppositely, and the second optical element 4 is slidably arranged in the third slots 14.
The distance between the first optical element 3 and the second optical element 4 is greater than 0 and less than 2/3 of the height of the lamp body, preferably, the distance is 1/3-2/3 of the height of the lamp body 1, so that the first optical element 3 and the LED light source 2 can be deeply hidden in the lamp body 1, and the phenomenon of glare caused by the fact that the LED light source 2 and the first optical element 3 in the lamp body 1 are directly viewed is avoided.
With reference to fig. 4, the first optical element 3 of the present embodiment is preferably a strip-shaped total reflection lens, and the total reflection lens includes a middle light incident surface 31, a first light incident side surface 32 disposed on one side of the middle light incident surface 31, a second light incident surface 34 disposed on the other side of the middle light incident surface 31 and enclosing with the middle light incident surface 31 and the first light incident surface 32 to form an accommodating groove 33 for accommodating the LED light source 2, a first total reflection surface 35 disposed on the outer side of the first light incident surface 32 and used for totally reflecting the emergent light of the first light incident surface 32, a second total reflection surface 36 disposed on the outer side of the second light incident surface 34 and used for totally reflecting the emergent light of the second light incident surface 34, and a light exit surface 37 disposed on the opposite side of the accommodating groove 33. The LED light source 2 is arranged in the accommodating groove 33, and light rays emitted by the LED light source 2 are emitted in parallel after passing through the total reflection lens. The total reflection lens is adopted as the first optical element 3, so that the emergent light can be more uniform, and the situation that the light of the middle part is too concentrated to cause local glare can not occur.
The second optical element 4 can be selected from a prism plate, a diffusion plate, a coated plate, a microstructure optical film and the like, and the diffusion plate is preferred. The blue light in the emergent light is intensively weakened through the uniform diffusion of the second optical element 4, so that the blue light harm of the emergent light is reduced.
In order to increase the light projection area of the whole lamp, the LED light sources 2 and the first optical elements 3 may be correspondingly arranged in more than two groups. The LED light sources 2, the first optical elements 3 and the second optical elements 4 are preferably arranged in parallel, the preset inclination angle theta is preferably 0-60 degrees, emergent light rays can be uniformly distributed on a blackboard, proper illumination is kept, the light rays emitted by the LED light sources 2 and the first optical elements 3 are enabled not to interfere with each other, and the light rays are enabled to be emitted with uniform illumination.
In order to enable the anti-dazzle baffle 5 to have a better anti-dazzle effect on the lower side of the lamp body 1 and reduce the shielding of the anti-dazzle baffle 5 on one side of the blackboard, the cross section of the anti-dazzle baffle 5 is in an arc shape bending towards one side of the second optical element 4.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.
Claims (7)
1. A blackboard lamp for anti-dazzle and eye protection is characterized by comprising a lamp body, an LED light source, a first optical element, a second optical element and an anti-dazzle baffle,
the LED lamp comprises a lamp body, an LED light source, a first optical element, a second optical element and a first optical element, wherein the lamp body is provided with an accommodating cavity with an opening at the bottom;
the anti-dazzle baffle is arranged below the second optical element and is connected with the lamp body positioned on the side, inclined downwards, of the second optical element.
2. An anti-glare eye-protecting blackboard lamp according to claim 1, wherein the anti-glare shield is capable of rotating with respect to the lamp body.
3. The blackboard lamp of claim 1, wherein the first optical element is a total reflection lens, the total reflection lens includes a middle light incident surface, a first light incident surface disposed on one side of the middle light incident surface, a second light incident surface disposed on the other side of the middle light incident surface and enclosing with the middle light incident surface and the first light incident surface to form a receiving groove for receiving an LED light source, a first total reflection surface disposed on the outer side of the first light incident surface and used for totally reflecting the emergent light of the first light incident surface, a second total reflection surface disposed on the outer side of the second light incident surface and used for totally reflecting the emergent light of the second light incident surface, and a light emergent surface disposed on the opposite side of the receiving groove.
4. An anti-glare eye-protection blackboard lamp according to claim 3, wherein the LED light source is disposed in the holding groove, and the light emitted from the LED light source is emitted in parallel after passing through the total reflection lens.
5. The blackboard lamp for preventing glare and protecting eyes of claim 1, wherein a first slot is formed at the top of the accommodating cavity, the LED light source is an LED light bar, and the LED light bar is accommodated in the first slot.
6. An anti-glare eye-protection blackboard lamp according to claim 1, wherein the two side walls of the accommodation chamber are oppositely provided with second slots, and two ends of the first optical element are arranged in the second slots;
and the two side walls of the opening of the accommodating cavity are relatively provided with third slots, and the second optical element is arranged in the third slots in a sliding manner.
7. An anti-glare eye-protection blackboard lamp according to claim 1, in which the second optical element is made of a material having a function of diffusing or absorbing blue light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121642440.9U CN216010517U (en) | 2021-07-19 | 2021-07-19 | Blackboard lamp of anti-dazzle eyeshield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121642440.9U CN216010517U (en) | 2021-07-19 | 2021-07-19 | Blackboard lamp of anti-dazzle eyeshield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216010517U true CN216010517U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121642440.9U Active CN216010517U (en) | 2021-07-19 | 2021-07-19 | Blackboard lamp of anti-dazzle eyeshield |
Country Status (1)
| Country | Link |
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| CN (1) | CN216010517U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024046014A1 (en) * | 2022-08-29 | 2024-03-07 | 京东方科技集团股份有限公司 | Front light source and display device |
-
2021
- 2021-07-19 CN CN202121642440.9U patent/CN216010517U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024046014A1 (en) * | 2022-08-29 | 2024-03-07 | 京东方科技集团股份有限公司 | Front light source and display device |
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