A lighting system for preventing and controlling myopia

Abstract

The present invention discloses a lighting system for preventing and controlling myopia, including a lighting space, a light source device and a work surface; the lighting space includes a ceiling, a floor and surrounding walls, a light source device is arranged in the center of the ceiling, the light source of the light source device is irradiated on the ceiling and forms a ceiling light spot area, and the emitted light is reflected step by step through the ceiling and the wall in sequence, and finally forms a preset illumination on the work surface; the maximum illumination value of the ceiling light spot area is ≥10000 lux, and the sum of the illumination of each plane of the lighting space exceeds 1500 lux on average. The present invention generates a light spot of a certain area on the ceiling above the light source device, effectively simulating the high-brightness illumination in the outdoor lighting environment, the state where the sky is the brightest and the glare is small; the sight trail is formed by the reflection of the ceiling light spot area, the ceiling, the wall and the work surface in sequence, successfully simulating the outdoor lighting environment, and having good practicality.

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting devices, and specifically relates to a lighting system for preventing and controlling myopia. Background Art

[0002] In recent years, myopia has shown a trend of high incidence, younger age and severity. Severe myopia can lead to retinal detachment, cataracts, glaucoma and even blindness. People have always believed that myopia is caused by genetic factors, excessive use of the eyes, insufficient light, use of electronic products, lack of outdoor exercise and long-distance viewing, but with the deepening of research on the causes of myopia, the role of natural light in outdoor activities that is far higher than indoor lighting levels in inhibiting the occurrence and development of myopia has gradually been recognized and valued. One hypothesized mechanism of this effect is that high levels of outdoor light stimulate the human retina and promote the release of dopamine, and dopamine can inhibit the abnormal elongation of the eyeball and inhibit the occurrence and development of myopia.

[0003] It is generally believed that in order for outdoor activities to be effective, it is necessary to spend more than 3 hours a day outdoors under a light level of tens of thousands of lux. However, in modern society with a fast work pace and heavy academic burden, especially for East Asian teenagers who spend more time studying indoors every day, the weekly outdoor activity time is only 5-6 hours. This seems to explain the high incidence of myopia in these regions in recent decades. Without a significant increase in outdoor activity time or changes in other factors, the trend of high incidence of myopia seems to be irreversible.

[0004] Although it is a good idea to build glass offices or classrooms to bring sunlight indoors to create a high-illuminance environment, in actual applications, there are many considerations such as architectural design, renovation, glass greenhouse air temperature regulation, user acceptance, etc., and the feasibility is not high. If artificial lighting is used to create an environment that not only contains the elements of outdoor light to inhibit the abnormal elongation of the eye axis during development, but also has high-quality lighting functions, that is, to create an indoor high-illuminance environment through artificial lighting, and fill the gap in the daily outdoor activity time required to inhibit the occurrence and development of myopia, it will be possible to provide an effective intervention method and tool to change the high incidence of myopia in the world, especially in East Asia, which has been difficult to control in recent decades.

[0005] According to current international and domestic lighting standards, the artificial lighting in offices, classrooms, reading rooms, home study rooms and other related places is set based on the illumination generated by the work surface. These targets are usually only hundreds of lux of average illumination, such as 500-750 lux in offices, 300 lux in ordinary classrooms, 500 lux in art classrooms, and more than 500 lux in desk lamps. The highest illumination at the center of desk lamps is usually only 1000-2000 lux. Although these illumination levels can meet the requirements of visual operations, in an indoor lighting environment that focuses on the illumination of the work surface, the illumination values ​​of other planes including ceilings and walls are very low, which is very different from the overall and stepped high brightness of the outdoor environment.

[0006] However, if the illumination of the work surface and local space is increased simply by increasing the lighting power and the brightness of the light source surface, the strong light emitted by the light source and lamps will cause glare problems ranging from discomfort to disability, which will not only affect normal visual function, but also lead to consequences such as retinal damage, psychological or emotional negative effects, etc. Even if the light source and lamps are set outside the normal field of vision and project strong light directly onto the work surface, on the one hand, the visual acuity will decrease and visual fatigue will increase due to the excessive absolute illumination, and on the other hand, the strong contrast of illumination in the normal field of vision outside the work surface will cause the same negative visual and psychological effects.

[0007] Chinese patent application CN202647372U discloses a high-pole desk lamp with a maximum light source power of 361 watts, which is placed 41-99 cm from the desktop and produces an illumination of 300-5000 lux at the eye position. This technical solution is actually equivalent to a large spotlight placed 41-99 cm from the desktop. People are placed in this "light cage". Even if we don't consider whether the human eye can tolerate strong light irradiation with a maximum illumination of thousands of lux at the eye position, the huge illumination contrast between this "light cage" and other indoor environments outside it will cause an obvious "cave effect", which will affect normal visual function, aggravate visual fatigue, and cause a sense of spatial psychological oppression. Prior art phototherapy light boxes are usually used in the treatment of seasonal affective disorder SAD. This type of light box usually uses strong white light, 480nm blue light or 500nm green light, and is placed at a certain distance (30-60 cm) in front of the patient's eyes, generating thousands to tens of thousands of lux of eye illumination. The patient has to endure strong light exposure for 30-60 minutes for treatment. Phototherapy light boxes are medical devices, not lighting equipment.

[0008] The absolute value of illumination or the spatial distribution of illumination produced by existing indoor lighting fixtures, such as ceiling lamps and table lamps, is different from that of outdoor lighting. Indoor lighting fixtures generally aim to provide basic illumination for the work surface, and are usually only a few hundred lux, which is 1-2 orders of magnitude different from the various illuminations in outdoor lighting environments. In addition, these lamps are mainly direct lighting, with the surface of the light source in the entire space being the brightest, the other planes being darker, and the ceiling being the darkest, which is exactly the opposite of the outdoor lighting environment where the sky is the brightest and the ground is the darkest. This makes it difficult to improve the overall illumination level of the indoor space by increasing the surface brightness of the light source.

[0009] In the above context, it is very necessary to invent a high luminous flux that can produce tens of thousands of lux illumination on the indoor ceiling and a higher level of illumination on other surfaces of the indoor space, and control the illumination of the work surface within the range of several hundred lux of the current international and domestic lighting standards. At the same time, it can also construct a reasonable illumination difference in the space between the ceiling and the work surface to form a "sight trail" to achieve smooth sight movement. It is very necessary to invent an indoor lighting device with myopia prevention and control function. Summary of the invention

[0010] The purpose of the present invention is to provide a lighting system for preventing and controlling myopia, which irradiates the ceiling with a light source upward, generates a light spot of a certain area on the ceiling above the light source device, and effectively simulates the high-brightness illumination, the brightest sky and the state with less glare in the outdoor lighting environment; a sight path is formed by reflection in sequence through the ceiling light spot area, ceiling surface, wall surface and work surface, so that the user's sight can be moved to the high-illuminance ceiling surface or even the light spot area at any time without obstacles, successfully simulating the outdoor lighting environment, and having good practicality.

[0011] The present invention is mainly achieved through the following technical solutions:

[0012] A lighting system for preventing and controlling myopia, comprising a lighting space, a light source device and a work surface arranged inside the lighting space; the lighting space comprises a ceiling, a floor and surrounding walls, a light source device is arranged in the center of the ceiling, a light source of the light source device irradiates the ceiling and forms a ceiling light spot area, and the emitted light is reflected step by step through the ceiling and the wall in sequence, and finally forms a preset illumination on the work surface; the maximum illumination value in the ceiling light spot area is greater than or equal to 10,000 lux, and the sum of the illumination of each plane of the lighting space exceeds 1,500 lux on average. Four interconnected walls are arranged around the lighting space.

[0013] In order to better implement the present invention, further, the reflectivity of the ceiling, wall and ground are 72%-85%, 65%-80% and 30%-50% respectively; the working surface is set to be 0.70-0.75 meters from the ground.

[0014] In order to better implement the present invention, further, the ceiling light spot area refers to the brightest area in the ceiling surface directly above the light source device, which is equivalent to 6.8 times to 9 times the light outlet area of ​​the light source device.

[0015] In order to better realize the present invention, further, the average illumination ratio of the ceiling light spot area to the working surface is 12>LS / WP>10, the average illumination ratio of the ceiling light spot area to the ceiling surface is 2<LS / CL<2.5, the average illumination ratio of the ceiling surface to the wall surface is 4.5<CL / WL<5, the average illumination ratio of the wall surface to the working surface is 0.8<WL / WP<1.2, and the average illumination ratio of the working surface to the ground is WP / FL<2.

[0016] In order to better realize the present invention, further, if the maximum illumination of the ceiling light spot area is equal to 10,000 lux and the average illumination is 5,000 lux, the average illumination of the ceiling, wall, work surface and ground is 2,000-2,500 lux, 400-555 lux, 416-500 lux and 208-250 lux respectively.

[0017] During use of the present invention, the light source device is hoisted in the middle of the ceiling. The light source device generates a specific spatial distribution of illumination through the light source and lens arranged inside, which is a necessary condition for simulating the outdoor lighting environment. The spatial distribution of illumination is set as follows:

[0018] First, the light source device produces a light spot of a certain area of ​​tens of thousands of lux on the ceiling directly above, which is used to simulate the high-brightness illumination in the outdoor lighting environment, the brightest sky and the smallest glare, which are two factors used to inhibit the elongation of the eye axis.

[0019] Second, the light emitted by the light source device to the ceiling is reflected by the ceiling and the wall, and the illumination is gradually reduced, and finally an illumination of hundreds of lux is formed on the work surface. Such an illumination of hundreds of lux is very suitable for learning and working activities such as reading and writing.

[0020] Third, the spatial distribution of specific illumination that decreases step by step from the ceiling to the wall and then to the work surface also establishes a "sight path" connecting the ceiling spot area, ceiling, wall, and work surface. This "sight path" allows the user's sight to move to the high-illuminance ceiling and even the spot area at any time without obstacles. This "anytime" is an important feature that helps users accumulate the equivalent of outdoor activity time under lighting conditions through normal use.

[0021] The specific settings of the specific illumination space distribution are as follows:

[0022] a. Lighting space distribution:

[0023] (1) Work surface (WP), 0.75 meters from the ground; (2) Ceiling surface (CL), which is the top surface of the enclosed space; (3) Ceiling light spot area (LS), which is the brightest area in the ceiling directly above the lighting fixture and is equivalent to 2.5 times the area of ​​the light outlet of the lighting fixture; (4) Wall surface (WL), which is the four sides of the enclosed space; (5) Floor surface (FL), which is the bottom surface of the enclosed space.

[0024] b. The range of the ratio of the average illumination of the five key planes or areas in the lighting space distribution: 12>LS / WP>10; (2) 2<LS / CL<2.5; (3) 4.5<CL / WL<5; (4) 0.8<WL / WP<1.2; (5) WP / FL<2.

[0025] c. The maximum illuminance value in the ceiling spot area (LS) is ≥10,000 lux, which is the maximum illuminance in the indoor space. These illuminance values ​​above 10,000 lux are used to simulate the high illuminance under outdoor lighting conditions, which is one of the key conditions for myopia prevention and control by inhibiting axial elongation.

[0026] The illuminance value above 10,000 lux is the maximum value of illuminance in the indoor space. It increases step by step from the work surface to the wall surface and then to the ceiling surface. It is the vertex of the "sight trail" that connects the work surface, wall surface, ceiling surface and ceiling spot area in sequence. The user's sight can move from the work surface (WP) to the vertex at any time without obstacles along the "sight trail". This "sight trail" composed of a gradient formed by a specific spatial distribution of illuminance is the second key condition for the present invention to achieve the effect of preventing and controlling myopia by inhibiting the elongation of the eye axis.

[0027] If the maximum illumination value in the ceiling spot area is 10,000 lux and the average illumination is 5,000 lux, according to the ratio in b above, it can be obtained that the average illumination of the ceiling CL is between 2,000 and 2,500 lux, the wall WL is between 400 and 555, the work surface WP is between 416 and 500 lux, and the floor FL is between 208 and 250 lux.

[0028] The average illuminance value of the work surface WP is greater than 450 lux, which is the preferred illuminance for learning and working surfaces such as reading and writing. The illuminance of the ceiling surface CL in the middle is 2000-2500 lux and the illuminance of the wall surface WL is 400-555 lux. They are two important "ladders" that connect the two functional planes - the ceiling surface CL and the work surface WP, so as to form the "sight path" which is the second key condition for preventing and controlling myopia.

[0029] In order to better realize the present invention, further, when the indoor area of ​​the lighting space is 5 square meters and the indoor height is less than or equal to 3.5 meters, the minimum total luminous flux of the light source of the light source device after light distribution is 5000 lumens; when the indoor area of ​​the lighting space is greater than 5 square meters and the indoor height is less than or equal to 3.5 meters, the total luminous flux of the light source of the light source device is as follows:

[0030] Φ={5000+[5000 / (5*indoor height)]*(indoor area*indoor height)*[a(85% / R 天花 )+b(80% / R 墙面 )+c(60% / R 工作面 )+d(30% / R 地面 )]} / (∑Tr 1-n / n)+Irregular space experience compensation value

[0031] in:

[0032] R 天花 is the reflectivity of the ceiling,

[0033] R 墙面 is the reflectivity of the wall,

[0034] R 工作面 is the reflectivity of the working surface,

[0035] R 地面 is the reflectivity of the ground,

[0036] ∑Tr 1-n is the sum of the transmittances of the lenses used in the light source device,

[0037] n is the number of lens types,

[0038] ∑Tr 1-n / n is the average light transmittance of the lens used in the light source device,

[0039] a is the ceiling reflection weight coefficient,

[0040] b is the wall reflection weight coefficient,

[0041] c is the reflection weight coefficient of the working surface,

[0042] d is the ground reflection weight coefficient,

[0043] a+b+c+d=1.

[0044] In order to better realize the present invention, further, the light source device includes a main body and a translucent dust-proof plate arranged on the top of the main body, a composite light source board is arranged inside the main body, and the light source board includes an A-zone light distribution area, a B-zone light distribution area, and a C-zone light distribution area which are arranged from the inside to the outside, the A-zone light distribution area adopts a focusing lens, the B-zone light distribution area adopts a wide-angle lens, and the C-zone light distribution area adopts a backlight lens.

[0045] In order to better realize the present invention, further, the light distribution area of ​​zone A is provided with an inner ring LED module, the light distribution area of ​​zone B is provided with a second ring LED module and a third ring LED module in sequence from the inside to the outside, and the light distribution area of ​​zone C is provided with a fourth ring LED module and an outer ring LED module in sequence from the inside to the outside.

[0046] In order to better implement the present invention, further, the light source device is hoisted 20-50 cm away from the ceiling; preferably, the light source device is 35 cm away from the ceiling, and the distance from the light source device to the wall is controlled to be 1-2.3 meters.

[0047] In order to better realize the present invention, further, the light distribution curve of the light source device is a symmetrical large wide-angle bat-wing light distribution curve, the beam angle is 165°-170°, and the angle corresponding to the maximum light intensity value is 22°-30°; this light distribution curve can effectively realize that the light source device generates light with intensity angles of 22°, 35°, 50°, and 75° corresponding to the ceiling light spot area, the inner area of ​​the ceiling surface, the outer area of ​​the ceiling surface, and the 15-25cm area on the top of the wall from the inside to the outside.

[0048] The light distribution curve of the light source device is as follows: Figure 7As shown, the light distribution shape will accurately produce a specific spatial distribution of illumination in each target plane or area. The light distribution curve of a common ceiling lamp is a "wide spherical light distribution curve", and the angle corresponding to the maximum light intensity value is generally 0° to 15°, and the beam angle is generally 120° to 130°. The light is mainly concentrated in front of the light-emitting surface, while there is less light on both sides, making the illumination at the edge of the working surface relatively weak, further resulting in low uniformity of the working surface. Generally, the light distribution curve of an ordinary full indirect lamp is a "narrow spherical light distribution curve", and the angle corresponding to the maximum light intensity value is generally 0° to 10°, and the beam angle is generally 90° to 100°. The light is mainly concentrated in front of the light-emitting surface, and there is too little light on both sides, so that the working surface produces a narrow and strong local light spot, further resulting in low uniformity of the working surface. In particular, the light source device is hoisted 20-50 cm away from the ceiling. Preferably, the light source device is 35 cm away from the ceiling, and the distance from the light source device to the wall is controlled at 1-2.3 meters. The light distribution curve of the present invention is a "symmetrical large wide-angle bat-wing light distribution curve". The angle corresponding to the maximum light intensity value is 22° to 30°, and the beam angle is 165° to 170°. The light can be greatly diffused in all directions, and the light intensity in all directions increases with the increase of the beam angle, so that the illumination at the edge of the working surface is still sufficient, further improving the uniformity of the working surface.

[0049] In order to better realize the present invention, further, the light distribution areas in zone A, zone B and zone C are spaced apart from each other, and the interval between the light distribution areas in zone A and zone B is controlled between 6.5 cm and 7 cm; the interval between the light distribution areas in zone B and zone C is controlled between 7 cm and 7.3 cm.

[0050] In order to better realize the present invention, further, the spacing between lenses in the light distribution area of ​​zone A is greater than or equal to 5 mm and less than or equal to 8 mm; the spacing between lenses in the light distribution area of ​​zone B is greater than or equal to 6 mm and less than or equal to 10 mm; the spacing between lenses in the light distribution area of ​​zone C is greater than or equal to 8 mm and less than or equal to 12 mm.

[0051] The light distribution areas in area A, area B and area C are spaced apart from each other. According to the heat dissipation requirements and to ensure the light distribution effect as much as possible, the interval between the light distribution areas in area A and area B is controlled between 6.5cm and 7cm. The interval between the light distribution areas in area B and area C is controlled between 7cm and 7.3cm; importantly, the interval between the lenses in the light distribution areas in area A must be greater than 5mm and not greater than 8mm; importantly, the interval between the lenses in the light distribution areas in area B must be greater than 6mm and not greater than 10mm; importantly, the interval between the lenses in the light distribution areas in area C must be greater than 8mm and not greater than 12mm.

[0052] In order to better realize the present invention, further, the light distribution areas in zone A, zone B and zone C are spaced apart from each other, and the LED power-to-area ratios of the light distribution areas in zone A, zone B and zone C are 0.135-0.179 W / cm2, 0.215-0.287 W / cm2 and 0.072-0.096 W / cm2 respectively.

[0053] In order to better implement the present invention, further, the bottom of the light source board is connected to the body through a heat dissipation mechanism, and the heat dissipation mechanism includes a heat conduction plate and a heat dissipation plate which are sequentially arranged inside the body from top to bottom.

[0054] In order to better realize the present invention, further, the main body includes a side shell and a bottom shell, the light source board is installed on the side shell through a bottom plate, a heat conducting plate is arranged between the light source board and the bottom plate, and a heat conducting plate and a heat dissipation plate are respectively arranged at the upper and lower ends of the bottom plate.

[0055] In order to better realize the present invention, further, the peripheral sides of the side shell and the peripheral sides of the bottom shell are respectively provided with a plurality of aerodynamic grooves corresponding to the heat conduction grooves of the heat conduction plate, the peripheral sides of the bottom plate are provided with connecting holes corresponding to the aerodynamic grooves, and a through groove is provided in the middle, a circulation groove is provided between the heat dissipation plate and the bottom plate, and the heat dissipation plate and the bottom shell are spaced apart, and the heat conduction grooves, the through grooves and the circulation grooves are connected in sequence.

[0056] The light source device is hoisted 20-50 cm away from the ceiling; preferably, the light source device is 35 cm away from the ceiling, and the distance from the light source device to the wall is controlled to be 1-2.3 meters. Furthermore, a low-noise axial cooling fan is arranged under the light source board; the present invention realizes that air flows from the aerodynamic grooves on the sides and the bottom periphery into the heat conduction groove in the middle of the heat conduction plate through the arrangement of the aerodynamic grooves, and then flows downward into the heat dissipation grooves, forming air circulation, and then taking away the heat, realizing the heat dissipation of the light source device. If an axial fan is added for heat dissipation, the surface temperature of the LED lamp beads can be controlled within 58°C when the indoor temperature does not exceed 40°C, further improving reliability and having good practicality.

[0057] Beneficial effects of the present invention:

[0058] (1) The present invention irradiates the ceiling with light source upwards, generates a light spot of a certain area on the ceiling above the light source device, and effectively simulates the high brightness illumination, the brightest sky and the state with less glare in the outdoor lighting environment; a sight path is formed by sequential reflection of the ceiling light spot area, ceiling surface, wall surface and work surface, so that the user's sight can move to the high-illuminance ceiling surface or even the light spot area at any time without obstacles, successfully simulating the outdoor lighting environment and having good practicality;

[0059] (2) The present invention effectively simulates the high-brightness illumination, the brightest sky and low-glare state in the outdoor lighting environment by setting the maximum illumination value in the ceiling spot area to be greater than or equal to 10,000 lux; the light emitted by the light source device to the ceiling is reflected by the ceiling and the wall to gradually reduce the illumination, and finally forms an illumination of hundreds of lux on the working surface, forming a sight path, so that the user's sight can move to the high-illuminance ceiling or even the spot area at any time without obstacles, effectively simulating the outdoor lighting environment indoors, and having good practicality;

[0060] (3) The present invention irradiates the ceiling with light source upwards, generates a light spot of a certain area on the ceiling above the light source device, and effectively simulates the high brightness illumination under the outdoor lighting environment, the state where the sky is the brightest and the glare is small; the light distribution area in area A, area B, and area C generate a specific illumination spatial distribution through the cooperation of the light source and the lens, and realizes the effective simulation of the outdoor lighting environment indoors, which has good practicality;

[0061] (4) The present invention realizes effective heat dissipation by setting the intervals between the light distribution areas in area A, area B, and area C, and setting the LED power area ratio of each light distribution area on the premise of satisfying the simulated outdoor lighting environment, and has good practicality;

[0062] (5) The present invention realizes that air flows from the aerodynamic grooves on the sides and bottom into the heat conduction grooves in the middle of the heat conduction plate, and then flows downward into the heat dissipation grooves, forming air circulation, thereby taking away heat, thereby achieving heat dissipation of the light source device. When the indoor temperature does not exceed 40°C, the surface temperature of the LED lamp beads can be controlled within 68°C, which has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A schematic diagram of the structure of the present invention;

[0064] Figure 2 for Figure 1 Left view of

[0065] Figure 3 is a cross-sectional view of a light source device;

[0066] Figure 4 It is a three-dimensional exploded view of the present invention;

[0067] Figure 5 This is a schematic diagram of the structure of the lamp beads arranged on the light source board;

[0068] Figure 6 It is a regional schematic diagram of the spatial light environment;

[0069] Figure 7 is a light distribution curve diagram of the light source device;

[0070] Figure 8 It is an analytical diagram of the relationship between the arrangement array of lamp beads on the light source board and the light distribution curve;

[0071] Fig. 9 This is the anti-glare principle diagram of the lighting system;

[0072] Fig.10 A schematic diagram of the lighting system.

[0073] Among them: 1. side shell, 2. aerodynamic groove, 3. dustproof plate, 4. bottom shell, 5. heat sink, 8. driving power supply, 9. heat conduction plate, 10. bottom plate, 11. low noise axial flow cooling fan, 15. suspension rod, 16. upper connecting assembly, 17. lower connecting assembly, 19. light source board, 25. backlight lens, 26. wide-angle lens, 27. focusing lens, 29. inner circle LED module, 30. second circle LED module, 31. third circle LED module, 32. fourth circle LED module, 33. outer circle LED module, 35. ceiling light spot area, 36. ceiling surface, 37. wall surface, 38. working surface, 39. sight trail. DETAILED DESCRIPTION

[0074] Embodiment 1:

[0075] A lighting system for preventing and controlling myopia, such as Fig. 9 , Fig.10 As shown, it includes a lighting space, a light source device and a work surface 38 arranged inside the lighting space; the lighting space includes a ceiling 36, a floor, and a surrounding wall 37, a light source device is arranged in the center of the ceiling 36, the light source of the light source device irradiates the ceiling 36 and forms a ceiling light spot area 35, and the emitted light is reflected step by step through the ceiling 36 and the wall 37 in turn, and finally forms a preset illumination on the work surface 38; the maximum illumination value in the ceiling light spot area 35 is greater than or equal to 10,000 lux, and the sum of the illumination of each plane of the lighting space exceeds 1,500 lux on average.

[0076] Furthermore, the reflectivity of the ceiling 36, the wall 37, and the ground are 72%-85%, 65%-80%, and 30%-50% respectively. The working surface 38 is set to be 0.70-0.75 meters above the ground.

[0077] The present invention irradiates the light source upwardly on the ceiling surface 36, and generates a light spot of a certain area on the ceiling surface 36 above the light source device, effectively simulating the high-brightness illumination, the brightest sky and the state with less glare in the outdoor lighting environment; a sight path 39 is formed by reflection in sequence through the ceiling light spot area 35, the ceiling surface 36, the wall surface 37 and the work surface 38, so that the user's sight can be moved to the high-illuminance ceiling surface 36 or even the light spot area at any time without obstacle, successfully simulating the outdoor lighting environment, and having good practicality.

[0078] The present invention sets the maximum illumination value in the ceiling light spot area 35 to be greater than or equal to 10,000 lux, thereby effectively simulating the high-brightness illumination, the brightest sky and the state with less glare in the outdoor lighting environment; the light emitted by the light source device to the ceiling surface 36 is reflected by the ceiling surface 36 and the wall surface 37 to gradually reduce the illumination, and finally forms an illumination of hundreds of lux on the working surface 38, forming a sight path 39, so that the user's sight can be moved to the high-illuminance ceiling surface 36 or even the light spot area at any time without obstacles, effectively simulating the outdoor lighting environment indoors, and having good practicality.

[0079] Embodiment 2:

[0080] This embodiment is optimized on the basis of Embodiment 1, and the average illumination ratio of the ceiling light spot area 35 to the working surface 38 is 12>LS / WP>10, the average illumination ratio of the ceiling light spot area 35 to the ceiling surface 36 is 2<LS / CL<2.5, the average illumination ratio of the ceiling surface 36 to the wall surface 37 is 4.5<CL / WL<5, the average illumination ratio of the wall surface 37 to the working surface 38 is 0.8<WL / WP<1.2, and the average illumination ratio of the working surface 38 to the ground is WP / FL<2.

[0081] Furthermore, if Fig.10 As shown, the average illumination ratio of the ceiling light spot area 35 to the work surface 38 is 11, the average illumination ratio of the ceiling light spot area 35 to the ceiling surface 36 is 2, the average illumination ratio of the ceiling surface 36 to the wall surface 37 is 4.8, and the average illumination ratio of the wall surface 37 to the work surface 38 is 1.

[0082] Furthermore, if the maximum illumination of the ceiling light spot area 35 is equal to 10,000 lux and the average illumination is 5,000 lux, the average illumination of the ceiling 36, the wall 37, the work surface 38, and the ground are 2,000-2,500 lux, 400-555 lux, 416-500 lux, and 208-250 lux, respectively.

[0083] The present invention sets the maximum illumination value in the ceiling light spot area 35 to be greater than or equal to 10,000 lux, thereby effectively simulating the high-brightness illumination, the brightest sky and the state with less glare in the outdoor lighting environment; the light emitted by the light source device to the ceiling surface 36 is reflected by the ceiling surface 36 and the wall surface 37 to gradually reduce the illumination, and finally forms an illumination of hundreds of lux on the working surface 38, forming a sight path 39, so that the user's sight can be moved to the high-illuminance ceiling surface 36 or even the light spot area at any time without obstacles, effectively simulating the outdoor lighting environment indoors, and having good practicality.

[0084] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0085] Embodiment 3:

[0086] This embodiment is optimized on the basis of embodiment 1 or 2. When the indoor area of ​​the lighting space is 5 square meters and the indoor height is less than or equal to 3.5 meters, the minimum value of the total luminous flux of the light source of the light source device after light distribution is 5000 lumens; when the indoor area of ​​the lighting space is greater than 5 square meters and the indoor height is less than or equal to 3.5 meters, the total luminous flux of the light source of the light source device is as follows:

[0087] Φ={5000+[5000 / (5*indoor height)]*(indoor area*indoor height)*[a(85% / R 天花 )+b(80% / R 墙面 )+c(60% / R 工作面 )+d(30% / R 地面 )]} / (∑Tr 1-n / n)+Irregular space experience compensation value

[0088] in:

[0089] R 天花 is the reflectivity of the ceiling,

[0090] R 墙面 is the reflectivity of the wall,

[0091] R 工作面 is the reflectivity of the working surface,

[0092] R 地面 is the reflectivity of the ground,

[0093] ∑Tr 1-n is the sum of the transmittances of the lenses used in the light source device,

[0094] n is the number of lens types,

[0095] ∑Tr 1-n / n is the average light transmittance of the lens used in the light source device,

[0096] a is the ceiling reflection weight coefficient,

[0097] b is the wall reflection weight coefficient,

[0098] c is the reflection weight coefficient of the working surface,

[0099] d is the ground reflection weight coefficient,

[0100] a+b+c+d=1.

[0101] The present invention irradiates the light source upwardly on the ceiling surface 36, and generates a light spot of a certain area on the ceiling surface 36 above the light source device, effectively simulating the high-brightness illumination, the brightest sky and the state with less glare in the outdoor lighting environment; a sight path 39 is formed by reflection in sequence through the ceiling light spot area 35, the ceiling surface 36, the wall surface 37 and the work surface 38, so that the user's sight can be moved to the high-illuminance ceiling surface 36 or even the light spot area at any time without obstacle, successfully simulating the outdoor lighting environment, and having good practicality.

[0102] The other parts of this embodiment are the same as those of the above-mentioned embodiment 1 or 2, and thus will not be described in detail.

[0103] Embodiment 4:

[0104] This embodiment is optimized based on any one of Embodiments 1-3. Figure 1 , Figure 2 As shown, the light source device includes a main body and a translucent dust-proof plate 3 arranged on the top of the main body, and a composite light source plate 19 is arranged inside the main body. The light source plate 19 includes a light distribution area in zone A, a light distribution area in zone B, and a light distribution area in zone C, which are arranged in sequence from the inside to the outside. The light distribution area in zone A adopts a focusing lens 27, which can focus the light directly in front; the light distribution area in zone B adopts a wide-angle lens 26, which can evenly distribute the light directly in front; the light distribution area in zone C adopts a backlight lens 25, which can refract the light to both sides at a wide angle, and the light intensity in the range near the 0° beam angle is relatively low.

[0105] Furthermore, if Figure 8 As shown, the light distribution area of ​​zone A is provided with an inner ring LED module 29, the light distribution area of ​​zone B is provided with a second ring LED module 30 and a third ring LED module 31 in sequence from the inside to the outside, and the light distribution area of ​​zone C is provided with a fourth ring LED module 32 and an outer ring LED module 33 in sequence from the inside to the outside.

[0106] Furthermore, if Fig. 9 , Fig.10 As shown, the light source device is hoisted 20-50 cm below the ceiling 36; preferably, the light source device is hoisted 35 cm below the ceiling 36, and the distance from the light source device to the wall is controlled to be 1-2.3 meters.

[0107] Furthermore, if Figure 7 , Figure 8 As shown, the light distribution curve of the present invention is a "symmetrical large wide-angle bat-wing light distribution curve", the angle corresponding to the maximum light intensity value is 22° to 30°, the beam angle is 165° to 170°, the light can be greatly diffused in all directions, and the light intensity in all directions increases with the increase of the beam angle, so that the illumination at the edge of the working surface is still sufficient, further improving the uniformity of the working surface.

[0108] Furthermore, the light intensity angle is 22° (i.e. Figure 8 The light of 22° in the center can support the ceiling spot area 35 (LS area).

[0109] Furthermore, the light intensity angle is 35° (i.e. Figure 8 The light of 35° in the middle can support the inner side of the ceiling surface 36 (CL area), that is, the ceiling area away from the wall.

[0110] Furthermore, the light intensity angle is 50° (i.e. Figure 8 The light of 50° in the middle can support the outside of the ceiling surface 36 (CL area), that is, the ceiling area close to the wall.

[0111] Furthermore, the light intensity angle is 75° (i.e. Figure 8 The light of 75° in the middle can support the height of wall 37 (WL area) (vertical range is about 20cm).

[0112] The light distribution of the present invention is to greatly expand the beam angle, make full use of the two major areas of the ceiling (primary) and the wall (secondary) in the space, and use the diffuse reflection layer (such as white lime) of the surface material of the two to scatter the light disorderly, making the light soft enough.

[0113] Generally speaking, compared with common ceiling lamps, the light reaching the working surface 38 of the present invention undergoes diffuse reflection times of at least "n+1" times (where n is the number of diffuse reflection times of the light of common ceiling lamps), that is, 100% of all the light reaching the working surface 38 is diffuse reflection light, while in common ceiling lamps, generally only 30% to 40% of the light reaching the working surface 38 is diffuse reflection light; the present invention simulates the mild sunlight produced by multiple diffuse reflections of sunlight in the clouds and fine particles in the atmosphere.

[0114] Due to the complex requirements of specific illumination spatial distribution, light sources must be grouped, and each group is used as an independent light source to distribute light to the target area. The light source is divided into three independent light distribution areas: area A, area B, and area C. The lenses used in each area are different, and each area can be further subdivided into independent sub-areas. Figure 6As shown, the light distribution area in zone A is the near-end light distribution of the spot area LS and the ceiling area CL, which is the universal basic light distribution when the floor area of ​​the space is 5 square meters. The light distribution area in zone A realizes light emission through the inner circle LED module 29. The light distribution area in zone B is a transition and uniformity buffer adjustment area, which is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination ratio between the ceiling surface 36 and other planes including the wall surface 37 and the working surface 38. Light emission is realized through the second circle LED module 30 and the third circle LED module 31. The light distribution area in zone C is the far-end illumination light distribution of the ceiling surface 36, and at the same time establishes the basic illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38, and realizes light emission through the fourth circle LED module 32 and the outer circle LED module 33.

[0115] The present invention realizes the following by setting the inner circle LED module 29, the second circle LED module 30, the third circle LED module 31, the fourth circle LED module 32, and the outer circle LED module 33: Figure 7 , Figure 8 The light distribution curve shown is conducive to effectively simulating the outdoor lighting environment indoors and has good practicality.

[0116] Due to the complex requirements of specific illumination spatial distribution, light sources must be grouped, and each group is used as an independent light source to distribute light to the target area. The light source is divided into three independent light distribution areas: area A, area B, and area C. The lenses used in each area are different, and each area can be further subdivided into independent sub-areas. Figure 7 As shown, the light distribution area in zone A is the near-end light distribution of the spot area LS and the ceiling area CL, which is the general basic light distribution when the floor area of ​​the space is 5 square meters. The light distribution area in zone A adopts a focusing lens 27. The light distribution area in zone B is a transition and uniformity buffer adjustment area, which is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination ratio between the ceiling surface 36 and other planes including the wall surface 37 and the work surface 38. The wide-angle lens 26 is adopted. The light distribution area in zone C is the far-end illumination distribution of the ceiling surface 36, and at the same time establishes the basic illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the work surface 38, and the backlight lens 25 is adopted.

[0117] The present invention irradiates the light source upward to the ceiling surface 36, and generates a light spot of a certain area on the ceiling surface 36 above the light source device, effectively simulating the high-brightness illumination in the outdoor lighting environment, the state where the sky is the brightest and the glare is relatively small; the light distribution areas in area A, area B, and area C produce a specific spatial distribution of illumination through the cooperation of the light source and the lens, thereby effectively simulating the outdoor lighting environment indoors, and having good practicality.

[0118] The other parts of this embodiment are the same as any of the above embodiments 1-3, so they are not repeated here.

[0119] Embodiment 5:

[0120] This embodiment is optimized on the basis of the embodiment 4. The light distribution areas in area A, area B and area C are arranged at intervals from each other. According to the heat dissipation requirements and to ensure the light distribution effect as much as possible, corresponding requirements are made. The interval between the light distribution areas in area A and area B is controlled between 6.5 cm and 7 cm. The interval between the light distribution areas in area B and area C is controlled between 7 cm and 7.3 cm.

[0121] Furthermore, the spacing between lenses in the light distribution area of ​​zone A is greater than or equal to 5 mm and less than or equal to 8 mm; the spacing between lenses in the light distribution area of ​​zone B is greater than or equal to 6 mm and less than or equal to 10 mm; the spacing between lenses in the light distribution area of ​​zone C is greater than or equal to 8 mm and less than or equal to 12 mm.

[0122] Furthermore, the LED power-to-area ratios of the light distribution area in zone A, the light distribution area in zone B, and the light distribution area in zone C are 0.135-0.179 W / cm2, 0.215-0.287 W / cm2, and 0.072-0.096 W / cm2, respectively.

[0123] Furthermore, the light source device uses isolated constant voltage DC as constant current power supply.

[0124] Furthermore, if Figure 1 , Figure 2 As shown, a suspension rod 15 is provided on the top of the dustproof plate 3 , and an upper connecting component 16 and a lower connecting component 17 are respectively provided at both ends of the suspension rod 15 , and the suspension rod 15 is connected to the top of the dustproof plate 3 through the lower connecting component 17 .

[0125] During use, the present invention installs the light source device through the suspension rod 15, and the interior of the light source device can produce a specific spatial distribution of illumination through the cooperation of the light source and the lens. The present invention, through the arrangement of the light source board 19 and the dustproof board 3, irradiates the light source upward to the ceiling surface 36, and produces a light spot of a certain area of ​​tens of thousands of lux on the ceiling surface 36 directly above the light source device, which is used to simulate the high-brightness illumination in the outdoor lighting environment, the state where the sky is the brightest and the glare is small. This spatial distribution of illumination has the effect of preventing and controlling myopia by inhibiting the elongation of the eye axis.

[0126] The other parts of this embodiment are the same as those of the above-mentioned embodiment 4, so they will not be described in detail.

[0127] Embodiment 6:

[0128] This embodiment is optimized based on embodiment 4 or 5. Figure 3 , Figure 4As shown, the bottom of the light source board 19 is connected to the body through a heat dissipation mechanism, and the heat dissipation mechanism includes a heat conduction plate 9 and a heat dissipation plate 5 which are sequentially arranged inside the body from top to bottom.

[0129] Furthermore, if Figure 4 As shown, a low-noise axial flow cooling fan 11 is arranged between the heat conducting plate 9 and the heat dissipating plate 5 .

[0130] Furthermore, a plurality of aerodynamic grooves 2 are respectively provided on the circumference of the side surface and the bottom surface of the body, and a heat conducting groove connected with the aerodynamic grooves 2 is provided on the heat conducting plate 9 .

[0131] During use of the present invention, air flows from the aerodynamic grooves 2 on the sides and the bottom into the heat conduction grooves in the middle of the heat conduction plate 9, and then flows downward into the heat dissipation grooves, forming air circulation, and then taking away heat. The light source device is for illuminating upward, and aerodynamic grooves 2 are provided on the sides and the bottom of the lamp to guide the surrounding air into the heat conduction plate 9 under the light source board 19 (PCB lamp board), and at the same time into the heat dissipation plate 5 under the heat conduction plate 9, so as to reduce the heating temperature of the object.

[0132] The other parts of this embodiment are the same as those of the above-mentioned embodiment 4 or 5, so they will not be described in detail.

[0133] Embodiment 7:

[0134] This embodiment is optimized based on embodiment 4 or 5. Figure 3 , Figure 4 As shown, the bottom of the light source board 19 is connected to the body through a heat dissipation mechanism, and the heat dissipation mechanism includes a heat conduction plate 9 and a heat dissipation plate 5 which are sequentially arranged inside the body from top to bottom.

[0135] Furthermore, if Figure 4 As shown, a low-noise axial flow cooling fan 11 is arranged between the heat conducting plate 9 and the heat dissipating plate 5 .

[0136] Furthermore, the main body includes a side shell 1 and a bottom shell 4, the light source board 19 is installed on the side shell 1 through the bottom plate 10, a heat conducting plate 9 is arranged between the light source board 19 and the bottom plate 10, and a heat conducting plate 9 and a heat dissipation plate 5 are respectively arranged at the upper and lower ends of the bottom plate 10.

[0137] Furthermore, a plurality of aerodynamic grooves 2 are provided on the peripheral sides of the side shell 1 and the peripheral sides of the bottom shell 4 corresponding to the heat-conducting grooves of the heat-conducting plate 9, connecting holes are provided on the peripheral sides of the bottom plate 10 corresponding to the aerodynamic grooves 2, and a through groove is provided in the middle, a circulation groove is provided between the heat dissipation plate 5 and the bottom plate 10, and the heat dissipation plate 5 and the bottom shell 4 are spaced apart, and the heat-conducting grooves, the through grooves, and the circulation grooves are connected in sequence.

[0138] Furthermore, the light source board 19 is connected to the bottom plate 10 having a thickness of not less than 0.4 mm through connecting columns having a total contact area not less than 2% of the LED light board area of ​​the light source board 19 .

[0139] During use of the present invention, air flows from the aerodynamic grooves 2 on the sides and bottom into the heat conduction grooves in the middle of the heat conduction plate 9, and then flows downward into the heat dissipation grooves, forming air circulation, thereby taking away heat. The light source device is for illuminating upwards, and is provided with aerodynamic grooves 2 on the sides and bottom of the lamp to guide the surrounding air into the heat conduction plate 9 below the light source board 19 (PCB lamp board), and at the same time into the heat dissipation plate 5 below the heat conduction plate 9, thereby reducing the heating temperature of the object. In addition, the LED lamp board is connected to the bottom plate 10 with a lamp body thickness of not less than 0.4 mm through connecting columns with a total contact area of ​​not less than 2% of the area of ​​the LED lamp board. These measures can control the surface temperature of the LED lamp beads within 68°C when the indoor temperature does not exceed 40°C.

[0140] The other parts of this embodiment are the same as those of the above-mentioned embodiment 4 or 5, so they will not be described in detail.

[0141] Embodiment 8:

[0142] A lighting system for preventing and controlling myopia, such as Fig. 9 , Fig.10 As shown, it includes a lighting space and a light source device arranged in the lighting space, and the lighting space includes a ceiling surface 36, surrounding walls 37, a floor, and a work surface 38. The light source device is arranged in the middle of the ceiling surface 36, and the light source device irradiates upward and forms a ceiling light spot area 35 in the middle of the ceiling surface 36.

[0143] Furthermore, if Figure 1-Figure 4 As shown, it includes a main body and a translucent dust-proof plate 3 arranged on the top of the main body, a light source plate 19 is arranged inside the main body, and the light source plate 19 includes an A-zone light distribution area, a B-zone light distribution area, and a C-zone light distribution area which are arranged from the inside to the outside. The A-zone light distribution area adopts a focusing lens 27, the B-zone light distribution area adopts a wide-angle lens 26, and the C-zone light distribution area adopts a backlight lens 25.

[0144] During use of the present invention, Fig.10As shown, the light emitted from the light source device to the ceiling 36 is reflected by the ceiling 36 and the wall 37 to achieve a step-by-step reduction in illumination, and finally forms an illumination of several hundred lux on the work surface 38. This illumination range meets the lighting standard and is suitable for reading and writing activities. The specific illumination spatial distribution that decreases step by step from the ceiling 36 to the wall 37 and then to the work surface 38 simultaneously establishes a "sight trail 39" that connects the ceiling light spot area 35, the ceiling 36, the wall 37, and the work surface 38 in sequence. This "sight trail 39" allows the user's sight to move to the high-illuminance ceiling 36 or even the light spot area at any time without obstacles, successfully simulating the outdoor lighting environment.

[0145] Due to the complex requirements of specific illumination spatial distribution, light sources must be grouped, and each group is used as an independent light source to distribute light to the target area. The light source is divided into three independent light distribution areas: area A, area B, and area C. The lenses used in each area are different, and each area can be further subdivided into independent sub-areas. Figure 5 , Figure 6 As shown, the light distribution area in zone A is the near-end light distribution of the spot area LS and the ceiling area CL, which is the general basic light distribution when the floor area of ​​the space is 5 square meters. The light distribution area in zone A adopts a focusing lens 27. The light distribution area in zone B is a transition and uniformity buffer adjustment area, which is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination ratio between the ceiling surface 36 and other planes including the wall surface 37 and the work surface 38. The wide-angle lens 26 is adopted. The light distribution area in zone C is the far-end illumination distribution of the ceiling surface 36, and at the same time establishes the basic illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the work surface 38, and the backlight lens 25 is adopted.

[0146] Furthermore, if Figure 5 As shown, the light distribution area of ​​zone A is provided with an inner ring LED module 29, the light distribution area of ​​zone B is provided with a second ring LED module 30 and a third ring LED module 31 in sequence from the inside to the outside, and the light distribution area of ​​zone C is provided with a fourth ring LED module 32 and an outer ring LED module 33 in sequence from the inside to the outside.

[0147] like Figure 7 , Figure 8As shown, the light distribution area in zone A is the near-end light distribution of the spot area LS and the ceiling area CL, which is the universal basic light distribution when the floor area of ​​the space is 5 square meters. The light distribution area in zone A realizes light emission through the inner circle LED module 29. The light distribution area in zone B is a transition and uniformity buffer adjustment area, which is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination ratio between the ceiling surface 36 and other planes including the wall surface 37 and the working surface 38. Light emission is realized through the second circle LED module 30 and the third circle LED module 31. The light distribution area in zone C is the far-end illumination light distribution of the ceiling surface 36, and at the same time establishes the basic illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38, and realizes light emission through the fourth circle LED module 32 and the outer circle LED module 33.

[0148] The present invention realizes the following by setting the inner circle LED module 29, the second circle LED module 30, the third circle LED module 31, the fourth circle LED module 32, and the outer circle LED module 33: Figure 7 , Figure 8 The light distribution curve shown is conducive to effectively simulating the outdoor lighting environment indoors and has good practicality.

[0149] Furthermore, the light distribution areas in area A, area B and area C are spaced apart from each other, and the LED power-to-area ratios of the light distribution areas in area A, area B and area C are 0.135-0.179 W / cm2, 0.215-0.287 W / cm2 and 0.072-0.096 W / cm2 respectively.

[0150] During use, the present invention performs LED heat dissipation in multiple ways. The arrangement of LED chips on a 0.1 cm thick aluminum substrate not only meets the light distribution requirements, but also is spaced according to the heat dissipation requirements, wherein the LED power area ratio of area A is 0.135-0.179 watts per square centimeter; the LED power area ratio of area B is 0.215-0.287 watts per square centimeter; and the LED power area ratio of area C is 0.072-0.096 watts per square centimeter.

[0151] Furthermore, if Figure 4 As shown, the bottom of the light source board 19 is connected to the body through a heat dissipation mechanism, and the heat dissipation mechanism includes a heat conduction plate 9 and a heat dissipation plate 5 which are sequentially arranged inside the body from top to bottom. A driving power source 8 connected to the light source board 19 is also included.

[0152] Furthermore, the body includes a side shell 1 and a bottom shell 4, the light source board 19 is installed on the side shell 1 through the bottom plate 10, a heat conducting plate 9 is arranged between the light source board 19 and the bottom plate 10, and the heat conducting plate 9 and the heat dissipation plate 5 are arranged at the upper and lower ends of the bottom plate 10 respectively. Figure 2 As shown, the bottom shell 4 is an arc-shaped structure.

[0153] Furthermore, a plurality of aerodynamic grooves 2 are provided on the peripheral sides of the side shell 1 and the peripheral sides of the bottom shell 4 corresponding to the heat-conducting grooves of the heat-conducting plate 9, connecting holes are provided on the peripheral sides of the bottom plate 10 corresponding to the aerodynamic grooves 2, and a through groove is provided in the middle, a circulation groove is provided between the heat dissipation plate 5 and the bottom plate 10, and the heat dissipation plate 5 and the bottom shell 4 are spaced apart, and the heat-conducting grooves, the through grooves, and the circulation grooves are connected in sequence.

[0154] Furthermore, the light source board 19 is connected to the bottom plate 10 having a thickness of not less than 0.4 mm through connecting columns having a total contact area not less than 2% of the LED light board area of ​​the light source board 19 .

[0155] During use of the present invention, air flows from the aerodynamic grooves 2 on the sides and bottom into the heat conduction grooves in the middle of the heat conduction plate 9, and then flows downward into the heat dissipation grooves, forming air circulation, thereby taking away heat. The light source device is for illuminating upwards, and is provided with aerodynamic grooves 2 on the sides and bottom of the lamp to guide the surrounding air into the heat conduction plate 9 below the light source board 19 (PCB lamp board), and at the same time into the heat dissipation plate 5 below the heat conduction plate 9, thereby reducing the heating temperature of the object. In addition, the LED lamp board is connected to the bottom plate 10 with a lamp body thickness of not less than 0.4 mm through connecting columns with a total contact area of ​​not less than 2% of the area of ​​the LED lamp board. These measures can control the surface temperature of the LED lamp beads within 68°C when the indoor temperature does not exceed 40°C.

[0156] Furthermore, if Figure 4 As shown, a suspension rod 15 is provided on the top of the dustproof plate 3 , and an upper connecting component 16 and a lower connecting component 17 are respectively provided at both ends of the suspension rod 15 , and the suspension rod 15 is connected to the top of the dustproof plate 3 through the lower connecting component 17 .

[0157] Furthermore, the driving power supply 8 is controlled by a single chip microcomputer, and can be controlled by connecting to the single chip microcomputer via Bluetooth, sensors, infrared remote control, etc. The present invention uses an LLC switching power supply to provide an isolated constant voltage 48V DC as a constant current power supply.

[0158] Furthermore, the light source used by the light source board 19 is a full-spectrum LED that excites RGB phosphors with a violet or blue light chip. The typical color temperature used by the light source is 5000K. When color temperature adjustment is required, two full-spectrum LED chips with violet or blue light chips with color temperatures of 3000K and 6500K are used to excite RGB phosphors, and color temperature adjustment is achieved by changing the light emission ratio of the two different color temperatures. When color temperature adjustment is performed, the total output luminous flux is constant. When dimming is performed, the color temperature output after mixing the two different color temperature chips remains constant.

[0159] The present invention irradiates the light source upward to the ceiling surface 36, and generates a light spot of a certain area on the ceiling surface 36 above the light source device, effectively simulating the high-brightness illumination in the outdoor lighting environment, the state where the sky is the brightest and the glare is relatively small; the light distribution areas in area A, area B, and area C produce a specific spatial distribution of illumination through the cooperation of the light source and the lens, thereby effectively simulating the outdoor lighting environment indoors, and having good practicality.

[0160] Embodiment 9:

[0161] A lighting system for preventing and controlling myopia, such as Fig. 9 , Fig.10 As shown, it includes a lighting space and a light source device arranged inside the lighting space. The light source device is hoisted in the middle of the ceiling surface 36. The light source device generates a specific illumination spatial distribution through the light source and lens arranged inside, which is a necessary condition for simulating the outdoor lighting environment. The illumination spatial distribution is set as follows:

[0162] First, the light source device generates a light spot of a certain area of ​​tens of thousands of lux on the ceiling 36 directly above, which is used to simulate the high-brightness illumination in the outdoor lighting environment, the brightest sky and the smallest glare, which are two factors used to inhibit the elongation of the eye axis.

[0163] Second, the light emitted by the light source device to the ceiling 36 is reflected by the ceiling 36 and the wall 37 to reduce the illumination step by step, and finally forms an illumination of several hundred lux on the working surface 38. Such illumination of several hundred lux is very suitable for learning and working activities such as reading and writing.

[0164] Third, the spatial distribution of specific illumination that decreases step by step from the ceiling 36 to the wall 37 and then to the work surface 38 simultaneously establishes a "sight path 39" connecting the light spot area of ​​the ceiling 36, the ceiling 36, the wall 37, and the work surface 38. This "sight path 39" allows the user's sight to move to the high-illuminance ceiling 36 and even the light spot area at any time without obstacles. This "anytime" is an important feature that helps users accumulate the equivalent of outdoor activity time under lighting conditions through normal use.

[0165] Furthermore, the specific settings of the specific illumination spatial distribution are as follows:

[0166] (1) Lighting space distribution:

[0167] (1) Work surface 38 (WP), 0.75 meters from the ground; (2) Ceiling surface 36 (CL), which is the top surface of the enclosed space; (3) Ceiling light spot area 35 (LS), which is the brightest area in the ceiling surface 36 directly above the lighting fixture and is equivalent to 2.5 times the area of ​​the light outlet of the lighting fixture; (4) Wall surface 37 (WL), which is the four sides of the enclosed space; (5) Floor (FL), which is the bottom surface of the enclosed space.

[0168] (2) The range of the ratio of the average illumination of the five key planes or areas in the lighting space distribution: 12>LS / WP>10; (2) 2<LS / CL<2.5; (3) 4.5<CL / WL<5; (4) 0.8<WL / WP<1.2; (5) WP / FL<2.

[0169] (3) The maximum illuminance value in the ceiling spot area 35 (LS) is ≥10,000 lux, which is the maximum illuminance in the indoor space. These illuminance values ​​above 10,000 lux are used to simulate the high illuminance under outdoor lighting conditions, which is one of the key conditions for myopia prevention and control by inhibiting axial elongation.

[0170] The illumination value of more than 10,000 lux is the maximum illumination value in the indoor space. It increases step by step from the work surface 38 to the wall surface 37 and then to the ceiling surface 36. It is the vertex of the "sight path 39" that connects the work surface 38, the wall surface 37, the ceiling surface 36, and the ceiling spot area 35 in sequence. The user's sight can move from the work surface 38 (WP) to the vertex at any time without obstacles along the "sight path 39". This "sight path 39" formed by the gradient of the specific illumination spatial distribution is the second key condition for the present invention to achieve the effect of preventing and controlling myopia by inhibiting the elongation of the eye axis.

[0171] Furthermore, if the maximum illumination value in the ceiling light spot area 35 is 10,000 lux and the average illumination is 5,000 lux, according to the ratio in b above, it can be obtained that the average illumination of the ceiling 36CL is between 2,000 and 2,500 lux, the wall 37WL is between 400 and 555, the work surface 38WP is between 416 and 500 lux, and the floor FL is between 208 and 250 lux.

[0172] The average illuminance value of the work surface 38WP is greater than 450 lux, which is the preferred illuminance for reading and writing, etc. The illuminance of the ceiling surface 36CL in the middle is 2000-2500 lux and the illuminance of the wall surface 37WL is 400-555 lux. They are two important "ladders" that connect the two functional planes - the ceiling surface 36CL and the work surface 38WP, so as to form the "visual path 39" which is the second key condition for preventing and controlling myopia.

[0173] Furthermore, the light source of the light source device used is a full-spectrum LED that excites RGB phosphors with a purple or blue chip. The typical color temperature used by the light source is 5000K. The minimum total luminous flux of the light source after light distribution is 5000 lumens, corresponding to an indoor space with an area of ​​5 square meters, a height of less than 3.5 meters, and a ceiling 36, a wall 37, a work surface 38, and a ground reflectivity of 85%, 80%, 60%, and 30%.

[0174] Furthermore, when the indoor area is more than 5 square meters, the relationship between the required additional luminous flux and the indoor space area, when the indoor height is less than 3.5 meters, is calculated according to the following formula:

[0175] Φ={5000+[5000 / (5*indoor height)]*(indoor area*indoor height)*[a(85% / R 天花 )+b(80% / R 墙面 )+c(60% / R 工作面 )+d(30% / R 地面 )]} / (∑Tr 1-n / n)+Irregular space experience compensation value

[0176] in:

[0177] R 天花 is the reflectivity of the ceiling,

[0178] R 墙面 is the reflectivity of the wall,

[0179] R 工作面 is the reflectivity of the working surface,

[0180] R 地面 is the reflectivity of the ground,

[0181] ∑Tr 1-n is the sum of the transmittances of the lenses used in the light source device,

[0182] n is the number of lens types,

[0183] ∑Tr 1-n / n is the average light transmittance of the lens used in the light source device,

[0184] a is the ceiling reflection weight coefficient,

[0185] b is the wall reflection weight coefficient,

[0186] c is the reflection weight coefficient of the working surface,

[0187] d is the ground reflection weight coefficient,

[0188] a+b+c+d=1.

[0189] Furthermore, when color temperature adjustment is required, two purple or blue light chips with color temperatures of 3000K and 6500K are used to excite the full-spectrum LED chip of RGB phosphor, and the color temperature adjustment is achieved by changing the light emission ratio of the two different color temperatures. When color temperature adjustment is performed, the total output luminous flux is constant.

[0190] When dimming, the color temperature output by mixing the two chips with different color temperatures remains constant.

[0191] Furthermore, the light source device uses a combination of light distribution of multiple groups of light sources to achieve a specific spatial distribution of illumination.

[0192] The light distribution curve of the light source device is as follows: Figure 7 As shown, the light distribution shape will accurately produce a specific illumination spatial distribution in each target plane or area. Due to the complex requirements of the specific illumination spatial distribution of the present invention, the light sources must be grouped, and each group is used as an independent light source to distribute light to the target area.

[0193] like Figure 5 , Figure 6 As shown, the light source is divided into three independent light distribution areas, A, B, and C, and the lenses used in each area are different. Each area can be further subdivided into independent sub-areas. Area A is the near-end light distribution of the spot area LS and the ceiling area CL. It is the universal basic light distribution when the floor area of ​​the space is 5 square meters. Area A adopts a focusing lens 27. Area B is a transition and uniformity buffer adjustment area, which is used for buffer adjustment of the uniformity of the ceiling surface 36CL and adjustment and correction of the illumination ratio between the ceiling surface 36CL and other planes including the wall surface 37WL and the work surface 38WP. A wide-angle lens 26 is used. Area C is the far-end illumination distribution of the ceiling surface 36, and at the same time establishes the basic illumination ratio of the ceiling surface 36CL to other planes including the wall surface 37WL and the work surface 38WP. A backlight lens 25 is used.

[0194] Furthermore, the heat dissipation of the light source device:

[0195] In addition to meeting the light distribution requirements, the LED chips are arranged on a 0.1 cm thick aluminum substrate and are spaced according to the heat dissipation requirements. The LED power-area ratio of area A is 0.135-0.179 W / cm2; the LED power-area ratio of area B is 0.215-0.287 W / cm2; and the LED power-area ratio of area C is 0.072-0.096 W / cm2.

[0196] Furthermore, if Figure 3 , Figure 4 As shown, the lighting fixture of the present invention is upwardly illuminated, and aerodynamic grooves 2 are provided on the sides and bottom of the lamp to guide the surrounding air into the heat conducting plate 9 below the light source board 19 (PCB lamp board, aluminum substrate material), and at the same time into the heat dissipation plate 5 below the heat conducting plate 9, thereby reducing the heating temperature of the object. In addition, the LED lamp board is connected to the bottom plate 10 with a thickness of not less than 0.4 mm through a connecting column with a total contact area of ​​not less than 2% of the area of ​​the LED lamp board. These measures can control the surface temperature of the LED lamp beads to be less than 68° when the indoor temperature does not exceed 40°.

[0197] Furthermore, the power supply and dimming of the light source device:

[0198] Furthermore, the light source device adopts an LLC switching power supply to provide an isolated constant voltage of 48 volts DC as a constant current power supply.

[0199] Furthermore, the dimming adopts a mixed dimming method of AM and PWM, PWM dimming is used in the range of luminous flux 1-30%, and AM dimming is used in the range of luminous flux 31%-100%. The color temperature remains constant during the dimming process. In the color adjustment process, the illumination is kept constant, especially at the upper and lower ends of the color temperature.

[0200] The present invention irradiates the light source upwardly on the ceiling surface 36, and generates a light spot of a certain area on the ceiling surface 36 above the light source device, effectively simulating the high-brightness illumination, the brightest sky and the state with less glare in the outdoor lighting environment; a sight path 39 is formed by reflection in sequence through the ceiling light spot area 35, the ceiling surface 36, the wall surface 37 and the work surface 38, so that the user's sight can be moved to the high-illuminance ceiling surface 36 or even the light spot area at any time without obstacle, successfully simulating the outdoor lighting environment, and having good practicality.

[0201] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A lighting system for preventing and controlling myopia, characterized in that: It includes a lighting space, a light source device and a work surface arranged inside the lighting space; the lighting space includes a ceiling, a floor and surrounding walls; a light source device is arranged in the center of the ceiling; the light source of the light source device irradiates the ceiling and forms a ceiling light spot area, and the emitted light is reflected step by step through the ceiling and the wall in turn, and finally forms a preset illumination on the work surface; the maximum illumination value in the ceiling light spot area is greater than or equal to 10,000 lux, and the sum of the illumination of each plane of the lighting space exceeds 1,500 lux on average; the ceiling light spot area refers to the brightest area in the ceiling directly above the light source device, which is equivalent to 6.8 times to 9 times the light outlet area of ​​the light source device.

2. A lighting system for preventing and controlling myopia according to claim 1, characterized in that: The average illumination ratio of the ceiling light spot area to the working surface is 12>LS / WP>10, the average illumination ratio of the ceiling light spot area to the ceiling surface is 2<LS / CL<2.5, the average illumination ratio of the ceiling surface to the wall surface is 4.5<CL / WL<5, the average illumination ratio of the wall surface to the working surface is 0.8<WL / WP<1.2, and the average illumination ratio of the working surface to the ground is WP / FL<2.

3. A lighting system for preventing and controlling myopia according to claim 1, characterized in that: The reflectivity of the ceiling, wall and ground are 72%-85%, 65%-80% and 30%-50% respectively; the working surface is set to be 0.70-0.75 meters from the ground.

4. A lighting system for preventing and controlling myopia according to any one of claims 1 to 3, characterized in that: When the indoor area of ​​the lighting space is 5 square meters and the indoor height is less than or equal to 3.5 meters, the minimum total luminous flux of the light source of the light source device after light distribution is 5000 lumens; when the indoor area of ​​the lighting space is greater than 5 square meters and the indoor height is less than or equal to 3.5 meters, the total luminous flux of the light source of the light source device is as follows: Φ={5000+[5000 / (5*indoor height)]*(indoor area*indoor height)*[a(85% / R 天花 )+b(80% / R 墙面 )+c(60% / R 工作面 )+d(30% / R 地面 )]} / (∑Tr 1-n / n)+Irregular space experience compensation value in: R 天花 is the reflectivity of the ceiling, R 墙面 is the reflectivity of the wall, R 工作面 is the reflectivity of the working surface, R 地面 is the reflectivity of the ground, ∑Tr 1-n is the sum of the transmittances of the lenses used in the light source device, n is the number of lens types, ∑Tr 1-n / n is the average light transmittance of the lens used in the light source device, a is the ceiling reflection weight coefficient, b is the wall reflection weight coefficient, c is the reflection weight coefficient of the working surface, d is the ground reflection weight coefficient, a+b+c+d=1.

5. The myopia prevention and control lighting system according to claim 1, characterized in that: The light source device includes a main body and a translucent dust-proof plate arranged on the top of the main body. A composite light source plate is arranged inside the main body. The light source plate includes an A-zone light distribution area, a B-zone light distribution area, and a C-zone light distribution area, which are arranged in sequence from the inside to the outside. The A-zone light distribution area adopts a focusing lens, the B-zone light distribution area adopts a wide-angle lens, and the C-zone light distribution area adopts a backlight lens.

6. A lighting system for preventing and controlling myopia according to claim 5, characterized in that: The A zone light distribution area is provided with an annular inner ring LED module, the B zone light distribution area is provided with an annular second ring LED module and a third ring LED module from the inside to the outside, and the C zone light distribution area is provided with an annular fourth ring LED module and an outer ring LED module from the inside to the outside.

7. A lighting system for preventing and controlling myopia according to claim 5 or 6, characterized in that: The light distribution curve of the light source device is a symmetrical wide-angle bat-wing light distribution curve, the beam angle is 165°-170°, and the angle corresponding to the maximum light intensity value is 22°-30°; the light rays with intensity angles of 22°, 35°, 50°, and 75° in the light distribution curve of the light source device correspond to the ceiling spot area, the inner area of ​​the ceiling surface, the outer area of ​​the ceiling surface, and the top of the wall.

8. A lighting system for preventing and controlling myopia according to claim 5 or 6, characterized in that: The light distribution areas in area A, area B and area C are spaced apart from each other, and the LED power-to-area ratios of the light distribution areas in area A, area B and area C are 0.135-0.179 W / cm2, 0.215-0.287 W / cm2 and 0.072-0.096 W / cm2 respectively.

9. The myopia prevention and control lighting system according to claim 5, characterized in that: The bottom of the light source board is connected to the main body through a heat dissipation mechanism, and the heat dissipation mechanism includes a heat conduction plate and a heat dissipation plate arranged inside the main body from top to bottom; the main body includes a side shell and a bottom shell, and the light source board is installed on the side shell through a bottom plate, a heat conduction plate is arranged between the light source board and the bottom plate, and a heat conduction plate and a heat dissipation plate are respectively arranged at the upper and lower ends of the bottom plate.

10. A lighting system for preventing and controlling myopia according to claim 9, characterized in that: The peripheral sides of the side shell and the peripheral sides of the bottom shell are respectively provided with a plurality of aerodynamic grooves corresponding to the heat conduction grooves of the heat conduction plate, the peripheral sides of the bottom plate are provided with connecting holes corresponding to the aerodynamic grooves, and a through groove is provided in the middle, a flow groove is provided between the heat dissipation plate and the bottom plate, and the heat dissipation plate and the bottom shell are spaced apart, and the heat conduction grooves, the through grooves, and the flow grooves are connected in sequence.

Images