Illuminating assembly, blackboard lamp and illuminating system thereof
By using a combination of collimating lenses and light control panels in the blackboard light, adjust the light to solve the glare problem, achieve low glare and uniform lighting, and improve the comfort of the teaching environment.
Patent Information
- Application Number
- CN202422311751.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing blackboard lights have glare problems, which affects teachers' teaching experience, and the traditional adjustment methods cannot take into account low glare, reasonable uniformity and illuminance values.
Using a combination of collimating lenses and light control panels, the light is adjusted to achieve low glare and uniform lighting effects by defining their size and structure.
While ensuring a reasonable illumination value, reduce the maximum light intensity value, reduce glare, achieve uniform illumination, and improve the comfort of the teaching environment.
Smart Images
Figure CN223090487U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of lighting fixtures, and particularly relates to a lighting component, a blackboard lamp and a lighting system thereof. Background Art
[0002] As a lighting tool for a blackboard, a blackboard lamp has a certain impact on the classroom environment and the teaching experience of teachers. For example, the current blackboard lamps generally have the problem of glare, and the glare is likely to directly shine into the eyes of teachers, thereby affecting the teaching experience of teachers.
[0003] Currently, there are mainly two ways to solve the glare problem of blackboard lamps. One is to lengthen the installation distance between the blackboard lamp and the blackboard, and the general distance is from 0.5 meter to 0.8 meters. This can reduce the light intensity value and achieve the uniformity value of the blackboard illuminance. However, this will also correspondingly increase the range where teachers are directly irradiated by the blackboard lamp. When the teacher turns around while writing, the eyes are generally directly irradiated by the lamp.
[0004] The second is to reduce the installation distance between the blackboard lamps. The general installation distance is between 0.25 meter and 0.35 meters. In this case, the range where teachers are directly irradiated by the blackboard lamp can be reduced. However, with the reduction of the installation distance, the blackboard lamp needs a stronger light intensity value to achieve uniformity, and the high light intensity value is an important factor causing direct glare. In addition, the efficiency of this solution is relatively low and does not meet the requirements of energy conservation and environmental protection.
[0005] Based on this, simply adjusting the installation distance between the blackboard lamp and the blackboard cannot well solve the glare influence caused by the blackboard lamp. Therefore, a blackboard lamp that takes into account low glare, reasonable uniformity and illuminance value is of great significance for teaching, and technicians in the relevant field urgently need to propose technical solutions to solve this problem. Summary of the Utility Model
[0006] In order to solve the deficiencies of the existing technology, the utility model provides a lighting component, a blackboard lamp and a lighting system thereof. By defining the dimensions and structures among the light source, the collimating lens and the light control plate, a lighting effect of low glare and uniform illumination is achieved while ensuring a reasonable illuminance value.
[0007] The technical effects to be achieved by the utility model are realized through the following technical aspects:
[0008] In the first aspect, the utility model provides a lighting component, including
[0009] a collimating lens, which is provided with a light incident end and a light emitting end, and the light emitting end is provided with a light emitting surface;
[0010] a light source, which is tightly connected to the light incident end; and
[0011] The light control plate is disposed on one side close to the light output end. A plurality of protruding light control units are provided on the side of the light control plate away from the collimating lens, and a light control surface is provided on the side of the light control plate close to the collimating lens.
[0012] Wherein, both the light output surface and the light control surface are perpendicular to the center line of the light source, and the light control surface is larger than the light output surface; the light emitted by the light source passes through the collimating lens and the light control plate and is projected onto the irradiation area.
[0013] In some embodiments, the light control unit is provided with a first light control end and a second light control end, and the first light control end extends obliquely to the second light control end in a thickened manner; along the extension direction of the light control unit, in the cross-section passing through the center line, the lighting assembly has the following relationship:
[0014]
[0015] Wherein,
[0016] a is the width of the light output surface;
[0017] b is the width of the light control surface;
[0018] c is the distance between the light output surface and the light control surface.
[0019] In some embodiments, the lighting assembly also has the following relationship:
[0020]
[0021] K is the ratio of the width b of the light control surface to the width a of the light output surface, and 2.5 ≤ K ≤ 5.
[0022] In some embodiments, the value range of a is 15 - 35 mm.
[0023] In some embodiments, in the non-edge area of the light control plate, the second light control end of the light control unit is connected to the first light control end of the adjacent light control unit.
[0024] In some embodiments, the light control unit is further provided with an optical deflection surface, the optical deflection surface is disposed between the first light control end and the second light control end, and the protruding height of the optical deflection surface is 0.2 - 0.8 mm.
[0025] In some embodiments, the light output center line of the light output surface and the light control center line of the light control surface coincide with the center line of the light source.
[0026] In a second aspect, the present utility model further provides a blackboard lamp, which includes a lamp housing and any one of the above-mentioned lighting assemblies, and the lighting assembly is installed in the lamp housing.
[0027] In a third aspect, the present utility model further provides an illumination system, which includes the above-mentioned blackboard lamp, and the blackboard lamp faces the blackboard and is installed obliquely above it;
[0028] When the illuminance value of the blackboard is 500 lux, the blackboard illumination system has the following relationship:
[0029]
[0030] Wherein,
[0031] H1 is the distance between the upper edge of the blackboard and the blackboard lamp in the vertical direction;
[0032] H2 is the height of the blackboard;
[0033] β is the angle between the straight line L2 and the horizontal plane, and the straight line L2 is the straight line between the light-emitting center of the blackboard lamp and the lower edge of the blackboard, and 53° ≤ β ≤ 56°.
[0034] Imax is the light intensity value of the light beam irradiated to the lower edge of the blackboard.
[0035] Preferably, the value range of H1 is 0.2 - 1 m, the value range of H2 is 1.2 - 1.8 m, and the angle β is 54.7°.
[0036] In summary, the present utility model has at least the following advantages:
[0037] 1. For the lighting assembly provided by the present utility model, the diffused light beam emitted by the light source is contracted into a collimated light beam with a small angle through the collimating lens, avoiding the reduction of the beam quality. At the same time, a light control plate is arranged on the side where the light-emitting end of the collimating lens is located, and the light is further adjusted through the light control plate, thereby increasing the overall light-emitting area of the lighting assembly, which is beneficial to meeting the minimum illuminance value of the blackboard and the effect of illuminance uniformity. At the same time, the maximum light intensity value is also reduced, thereby reducing the generation of glare and achieving comfortable lighting.
[0038] 2. The blackboard lamp provided by the present utility model adopts the above-mentioned lighting assembly, so that it has the effects of low glare and uniform illumination while meeting the reasonable illuminance value.
[0039] 3. The illumination system provided by the present utility model adopts a blackboard lamp including a lighting assembly, and adjusts the positional relationship between the blackboard lamp and the blackboard, thereby reducing the maximum light intensity value required at the minimum reasonable illuminance value. Description of the Drawings
[0040] Figure 1 This is a schematic structural diagram of the lighting component according to Embodiment 1 of the present utility model.
[0041] Figure 2 This is a schematic structural diagram of the light source and the collimating lens according to Embodiment 1 of the present utility model.
[0042] Figure 3 This is a schematic structural diagram of the light control plate according to Embodiment 1 of the present utility model.
[0043] Figure 4 This is a schematic structural diagram of the blackboard lamp according to Embodiment 2 of the present utility model.
[0044] Figure 5 This is a schematic structural diagram of the lighting system according to Embodiment 3 of the present utility model.
[0045] Markings in the figure:
[0046] 100, lighting component; 200, blackboard lamp; 300, blackboard; 400, lighting system;
[0047] 10, light source;
[0048] 20, collimating lens; 21, light incident cavity; 22, light incident end; 23, light exit end; 24, light exit surface;
[0049] 30, light control plate; 31, light control unit; 311, optical deflection surface; 312, optical flat surface; 32, first light control end; 33, second light control end; 34, light control surface;
[0050] 40, lamp housing. Detailed implementation manners
[0051] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below in conjunction with the drawings and specific embodiments. The preferred embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.
[0052] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.
[0053] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.
[0055] Embodiment 1:
[0056] Please refer to the attached Figures 1-3 , this embodiment provides a lighting assembly 100, which can achieve a low-glare and uniform illumination effect while meeting a reasonable illuminance value, and is beneficial to achieving a comfortable lighting effect when used for blackboard lighting.
[0057] Specifically, the lighting assembly 100 includes a collimating lens 20, a light source 10, and a light control plate 30. As Figures 1 to 3 shown, the collimating lens 20 is provided with a light incident end 22 and a light exit end 23. The light source 10 is disposed at the light incident end 22 of the collimating lens 20. The light control plate 30 is disposed on the side where the light exit end 23 of the collimating lens 20 is located, and there is a distance between the light control plate 30 and the light exit surface 24 of the collimating lens 20. The light exit end 23 is provided with a light exit surface 24, and the light control plate 30 is provided with a light control surface 34 on the side close to the collimating lens 20. Both the light exit surface 24 and the light control surface 34 are perpendicular to the center line L3 of the light source 10. The light of the light source 10 passes through the collimating lens 20 and exits from the light exit surface 24, then enters the light control plate 30 through the light control surface 34, and finally exits from the light control plate 30 and is projected onto the illumination area.
[0058] It should be noted that the collimating lens 20 can be an extruded lens or an injection molded lens. As Figure 2As shown, in this embodiment, a light incident cavity 21 is formed at the light incident end 22 of the collimating lens 20. The light source 10 is located at the light incident cavity 21, and the light of the light source 10 enters the collimating lens 20 through the light incident cavity 21 and then exits to the light control plate 30. Among them, the light of the light source 10 is contracted from a diffused beam into a collimated beam with a small angle after passing through the collimating lens 20, initially improving the beam quality, which is beneficial to further adjusting the beam subsequently. At the same time, the collimating lens 20 also initially expands the light emitting area.
[0059] Specifically, as Figure 3 shown, the light control plate 30 is provided with a plurality of protruding light control units 31 on the side away from the collimating lens 20. After the light passes through the light control plate 30, the light emitting surface is further expanded and the corresponding brightness value is reduced. Therefore, after the light emitted by the light source 10 is adjusted by the collimating lens 20 and the light control plate 30, it is beneficial to reduce the maximum light intensity value and reduce the generation of glare while meeting the minimum illuminance value of the blackboard, and at the same time achieve uniform illumination.
[0060] Specifically, the light control unit 31 is provided with a first light control end 32 and a second light control end 33. The first light control end 32 extends obliquely to the second light control end 33 in a thickened manner, so that the light can be deflected downward towards the blackboard after passing through the light control unit 31 to optimize the lighting effect on the blackboard and further meet the characteristics of blackboard lighting. In addition, as Figure 1 shown, on the cross-section along the extending direction of the light control unit 31 and passing through the center line L3 of the light source 10, the lighting assembly 100 has the following relationship:
[0061]
[0062] Among them, a is the width of the light emitting surface 24; b is the width of the light control surface 34; c is the distance between the light emitting surface 24 and the light control surface 34.
[0063] In order to further obtain a good lighting effect, the lighting assembly 100 also has the following relationship:
[0064]
[0065] Among them, K is the ratio of the width b of the light control surface 34 to the width a of the light emitting surface 24, and 2.5 ≤ K ≤ 5.
[0066] When applied to blackboard lighting, considering the irradiation range of the blackboard and further reducing the possibility of the teacher being directly irradiated, the value range of the width a of the collimating lens 20 at the light emitting surface 24 is preferably 13 - 35 mm.
[0067] Figure 3 The cross-sectional schematic diagram of the light control plate 30 is given. Please refer to Figure 1 and Figure 3, in the cross-section of the lighting assembly 100, the lighting assembly 100 is integrally inclined, and the direction of the emitted light is overall towards the left, so that the blackboard installed on the left can be irradiated. In this embodiment, the light control unit 31 bulges integrally towards the side away from the collimating lens 20, and is provided with a first light control end 32 and a second light control end 33. In the direction from the first light control end 32 to the second light control end 33, the light control unit 31 includes an optically deflected surface 311 and an optically flat surface 312 connected to each other. The optically deflected surface 311 is deflected towards the side where the optically flat surface 312 is located, and forms a polarization structure with the optically flat surface 312, so that the light passing through the light control unit 31 is deflected towards the lower part of the blackboard to meet the required illuminance value of the lower part of the blackboard. In this embodiment, the optically flat surface 312 is overall perpendicular to the light control surface 34, and the optically deflected surface 311 is inclined to the light control surface 34.
[0068] Furthermore, the light control units 31 are arranged neatly on the light control board 30. The second light control ends 33 of the light control units 31 in the non-edge area of the light control board 30 are connected to the first light control ends 32 of the adjacent light control units 31 to fully control the light. In this embodiment, the optically deflected surface 311 and the optically flat surface 312 are linearly extending planes, so the cross-section of the light control unit 31 has a serrated structure. Of course, this is not the only limitation on the structure of the light control unit 31. In some embodiments, the cross-section of the light control unit 31 can also be an arc surface structure that is overall deflected towards one side.
[0069] To optimize the light output effect, the convex height of the optically deflected surface 311 is preferably 0.2 - 0.8 mm, that is, the size of the optically deflected surface 311 in the direction perpendicular to the light control surface 34 is preferably 0.2 - 0.8 mm. In addition to this, in this embodiment, the light output surface 24 has a light output center line, and the light control surface 34 has a light control center line. Both the light output center line and the light control center line coincide with the center line L3 of the light source, so as to adjust the light emitted by the light source 10 by the collimating lens 20 and the light control board 30 as much as possible and improve the light output quality.
[0070] Embodiment 2:
[0071] Based on Embodiment 1, this embodiment provides a blackboard lamp 200.
[0072] Reference Figure 4 , a blackboard lamp 200 includes a lamp housing 40 and the lighting assembly 100 provided in Embodiment 1. The lighting assembly 100 is installed inside the lamp housing 40 to assemble and form the blackboard lamp 200. The light emitted by the light source 10 in the blackboard lamp 200 is emitted after passing through the collimating lens 20 and the light control board 30 in sequence.
[0073] Among them, the collimating lens 20 is used to adjust the diffused light beam emitted by the light source 10 into a collimated light beam, and the light control plate 30 further controls the light path through the light control unit 31. On this basis, by combining the limitation of the structure and distance between the light control plate 30 and the collimating lens 20, the brightness value on the surface of the blackboard lamp 200 can be reduced while ensuring a reasonable illuminance value, so as to achieve the purpose of reducing glare and make the blackboard lamp 200 have a uniform illumination effect.
[0074] It should be noted that Figure 4 The shown lamp housing 40 is only taken as an example and is not a specific limitation on the structure of the lamp housing 40.
[0075] Embodiment 3:
[0076] On the basis of the above embodiment, this embodiment provides an illumination system 400. The illumination system 400 includes the blackboard lamp 200 provided in Embodiment 2. For the same parts, please refer to Embodiment 2. The illumination system 400 provided in this embodiment will be described below.
[0077] The illumination system 400 is applied to the illumination of the blackboard 300. By adjusting the relationship between the blackboard 300 and the blackboard lamp 200, while satisfying the uniform illuminance and illuminance value of the blackboard 300, the strongest light intensity required by the blackboard 300 is reduced as much as possible, so as to achieve the purpose of reducing the brightness value on the surface of the illumination component 100, and further reduce the glare value of the blackboard lamp 200.
[0078] Figure 5 A schematic diagram of the illumination system 400 is given. As Figure 5 shown, the blackboard lamp 200 deflects towards the blackboard 300 and is installed obliquely above the blackboard 300. Among them, the projection line of the emission center O of the blackboard lamp 200 on the illumination surface of the blackboard 300 in the horizontal direction is L1, the straight line between the emission center O of the blackboard lamp 200 and the lower edge of the blackboard 300 is L2, and the angle between the straight line L2 and the horizontal plane is β. β is also the angle between the straight line L2 and the straight line L1. In addition, the distance between the blackboard lamp 200 and the upper edge of the blackboard 300 in the vertical direction is H1, the height of the blackboard 300 in the vertical direction is H1, and the light intensity value of the light irradiating the lower edge of the blackboard 300 is Imax.
[0079] When the illuminance value of the blackboard 300 is 500 lux, the following relational expressions exist in the illumination system 400:
[0080]
[0081] Among them, the value range of the included angle β formed between the straight line L1 and the straight line L2 is preferably 53° - 56°. At this time, when H1 and H2 are determined, the value of Imax is as small as possible under the condition of meeting the requirement of the blackboard 300 lighting standard of 500 lux illuminance. Further, the value range of the height H1 is preferably 0.2 - 1 m, and the value range of the height H2 is preferably 1.2 - 1.8 m. When the angle β takes the value of 54.7°, the value of Imax is the smallest under the condition of meeting the requirement of the blackboard 300 lighting standard of 500 lux illuminance.
[0082] The above content is only an example and description of the structure of the present utility model. Its description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these obvious replacement forms all belong to the protection scope of the present utility model.
Claims
1. A lighting assembly for blackboard lighting, characterized in that, Comprising: A collimating lens, having an incident light end and an emergent light end, and the emergent light end is provided with an emergent light surface; A light source, tightly connected to the incident light end; And A light control plate, arranged on one side close to the emergent light end, and on the side far from the collimating lens, the light control plate is provided with a plurality of protruding light control units, and on the side close to the collimating lens, the light control plate is provided with a light control surface; Wherein, the emergent light surface and the light control surface are both perpendicular to the center line of the light source, and the light control surface is larger than the emergent light surface; the light emitted by the light source passes through the collimating lens and the light control plate and is projected onto the illumination area.
2. The lighting assembly according to claim 1, characterized in that, The light control unit is provided with a first light control end and a second light control end, and the first light control end extends obliquely to the second light control end in a thickened manner; along the extending direction of the light control unit, in the cross section passing through the center line, the illumination assembly has the following relational expression: Wherein, a is the width of the emergent light surface; b is the width of the light control surface; c is the distance between the emergent light surface and the light control surface.
3. The lighting assembly according to claim 2, wherein The illumination assembly also has the following relational expression: K is the ratio of the width b of the light control surface to the width a of the emergent light surface, and 2.5 ≤ K ≤ 5.
4. The lighting assembly according to claim 2, wherein The value range of a is 15 - 35 mm.
5. The lighting assembly according to claim 2, characterized in that, In the non-edge area of the light control plate, the second light control end of the light control unit is connected to the first light control end of the adjacent light control unit.
6. The lighting assembly according to claim 5, wherein, The light control unit is further provided with an optical deflection surface, the optical deflection surface is arranged between the first light control end and the second light control end, and the protruding height of the optical deflection surface is 0.2 - 0.8 mm.
7. The lighting assembly according to claim 1, wherein, The emergent light center line of the emergent light surface and the light control center line of the light control surface coincide with the center line of the light source.
8. A blackboard lamp, characterized in that, Comprising a lamp housing and the illumination assembly according to any one of claims 1 - 7, and the illumination assembly is installed in the lamp housing.
9. A blackboard lighting system, characterized in that, Comprising the blackboard lamp according to claim 8, and the blackboard lamp is installed obliquely above the blackboard facing the blackboard; When the illuminance value of the blackboard is 500 lux, the blackboard lighting system has the following relational expression: Wherein, H1 is the distance between the upper edge of the blackboard and the blackboard lamp in the vertical direction; H2 is the height of the blackboard; β is the angle between the straight line L2 and the horizontal plane, the straight line L2 is the straight line between the emission center of the blackboard lamp and the lower edge of the blackboard, and 53° ≤ β ≤ 56°, Imax is the light intensity value of the light irradiated to the lower edge of the blackboard.
10. The blackboard lighting system according to claim 9, characterized in that, The value range of H1 is 0.2 - 1 m, the value range of H2 is 1.2 - 1.8 m, and the angle β is 54.7°.