CN214840449U

CN214840449U - Myopia prevention and control lighting system

Info

Publication number: CN214840449U
Application number: CN202121287830.9U
Authority: CN
Inventors: 冯昭扬; 梁斌豪; 史毅华; 罗幼坚; 谭小炫
Original assignee: Guangzhou Shiliang Lighting Technology Co ltd
Current assignee: Guangzhou Shiliang Lighting Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-11-23
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses a lighting system for preventing and controlling myopia, which comprises a lighting space, a light source device and a working surface; the lighting space comprises a ceiling surface, a ground surface and wall surfaces on the periphery, a light source device is arranged in the center of the ceiling surface, a light source of the light source device irradiates on the ceiling surface and forms a ceiling light spot area, and emitted light is reflected step by step sequentially through the ceiling surface and the wall surfaces, and finally preset illumination is formed on the working surface; the maximum illuminance value of the ceiling facula area is more than or equal to 10000 lux, and the sum of the illuminance of each plane of the illumination space is more than 1500 lux on average. The utility model generates light spots with a certain area on the ceiling above the light source device, and effectively simulates the states of high brightness, brightest sky and less glare under the outdoor illumination environment; the sight footpath is formed by sequentially reflecting the ceiling light spot area, the ceiling surface, the wall surface and the working surface, the environment of outdoor illumination is successfully simulated, and the sight footpath has better practicability.

Description

Myopia prevention and control lighting system

Technical Field

The utility model belongs to the technical field of lighting device, concretely relates to lighting system of prevention and control myopia.

Background

Myopia is a common ophthalmic disease, and 26 hundred million people are myopic globally according to the world vision report issued by the world health guard, wherein 3.12 million people are youngsters and children under 19 years old, and the incidence rate of myopia in east Asia regions is high. Myopia tends to be more advanced, younger and more severe in recent years. Severe myopia can lead to retinal detachment, cataracts, glaucoma and even blindness. Although myopia has been considered to be caused by genetic factors, excessive eye use, insufficient light, use of electronic products, lack of outdoor exercise, overlook and the like, with the research on the cause of myopia, the role of natural light far higher than the indoor illumination level in outdoor activities in inhibiting the occurrence and development of myopia is gradually recognized and emphasized, and one hypothesis mechanism of the role is that high-level outdoor light stimulates the retina of human eyes to promote the release of dopamine, and the dopamine inhibits abnormal elongation of the eyeballs to inhibit the occurrence and development of myopia.

It is generally considered that outdoor activities are effective, and activities that take more than 3 hours per day at outdoor light levels of ten thousand lux are indispensable. However, in modern society with fast work pace and heavy academic burden, especially eastern Asian teenagers spend more time indoors for learning, the outdoor activity time is only 5-6 hours per week. This seems to explain well the cause of high myopia in these areas in recent decades. The tendency to high myopia incidence appears to be unalterable without a significant increase in outdoor activity time or other factor changes.

Although it is a good idea to introduce sunlight into a room to create a high-illuminance environment through a glass-built office or classroom, it is not feasible to meet various considerations such as architectural design, modification, air temperature regulation of a glass greenhouse, user acceptance, and the like in practical applications. If an environment which not only contains the elements of abnormal extension of the eye axis in the process of inhibiting development of outdoor illumination but also has a high-quality illumination function is created indoors through an artificial illumination mode, namely, an indoor high-illumination environment is created through the artificial illumination mode, and gaps of the daily outdoor activity duration required for inhibiting the myopia from occurring and developing are filled up, an effective intervention method and an effective intervention tool are possibly provided for changing the situation that the myopia is high and difficultly occurs in the world in recent decades, particularly in east Asia regions to inhibit.

According to the current international and domestic lighting standards, the artificial lighting in the relevant places such as offices, classrooms, reading rooms, home study rooms and the like is set by taking the illumination generated by the working face as the target, the targets usually have the average illumination of hundreds of luxes, such as 500-. Although these illumination levels can meet the requirements of visual work, in an indoor lighting environment with working surface illumination as the key point, the illumination values of other planes including ceilings and walls are very low, and the overall brightness and the step brightness are greatly different from those of an outdoor environment.

However, if the illumination of the work surface and the local space is increased simply by increasing the illumination power and increasing the surface brightness of the light source, the glare from discomfort to incapability glare will be caused by the strong light emitted by the light source and the lamp, which not only affects the normal visual function, but also may cause adverse effects such as retinal damage, psychological or emotional effects, and the like. Even if the light source and the lamp are arranged outside the normal visual field range and the strong light is directly projected on the working surface, on one hand, the visual acuity is reduced and the visual fatigue is increased due to the overhigh absolute illumination, and on the other hand, the same visual and psychological negative effects are caused by the strong illumination contrast of the light source and the lamp and the normal visual field range outside the working surface.

The Chinese patent application CN202647372U discloses a high-rod desk lamp, the maximum light source power reaches 361W, the placement position is 41-99cm away from the desktop, and the illumination of 300-5000 lux is generated at the eye position. The technical scheme is actually equal to that a large spot lamp is placed 41-99cm away from a desktop, a person is placed in the 'light cage', even if whether the eyes can bear strong light irradiation with the highest eye position of thousands of lux illumination is not considered, the 'light cage' and the huge illumination of other indoor environments outside the light cage can cause obvious 'cave effect', the normal visual function can be influenced, the visual fatigue is aggravated, and the psychological sense of compression of space can be caused. Prior art phototherapy light boxes are commonly used in the treatment of seasonal affective disorder SAD. Such light boxes typically use relatively strong white light, 480nm blue light, or 500nm green light, placed some distance (30-60 cm) in front of the patient's eye to produce thousands to tens of thousands of mulches of eye illumination, and the patient should endure the intense light for 30-60 minutes to perform the treatment. The phototherapy lamp box belongs to the medical appliance, and is not a lighting device.

The absolute value of the illuminance or the spatial distribution of the illuminance generated by the existing indoor lighting lamps such as a ceiling lamp, a desk lamp and the like are different from the outdoor illumination. Indoor lighting fixtures generally target the basic illumination of the work surface, and usually have only a few hundred lux, which is 1-2 orders of magnitude different from various illumination in outdoor lighting environments. In addition, these lamps are mainly directed to direct lighting, and the light source surface is brightest in the whole space, the rest of the planes are darker, and the ceiling surface is darkest, which is exactly opposite to the situation that the sky is brightest and the ground is darker in the outdoor lighting environment, which makes it difficult to raise the overall illumination level of the indoor space by increasing the surface brightness of the light source.

Under above background, utility model a high luminous flux can produce the ten thousand lux illuminance at indoor smallpox face to produce higher level illuminance at other surfaces of indoor space, and with working face illuminance control in the several hundred lux within ranges of current international internal lighting standard, can also establish simultaneously that the reasonable illuminance drop in space between smallpox face, the working face realizes that the sight is steady to walk "sight pavement", and it is just very necessary to have the indoor lighting apparatus of near-sighted prevention and control function.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a myopia prevention and control lighting system, upwards shine the ceiling with the light source, produce the facula of certain area on the ceiling of light source device's top, effectively simulate the high brightness illumination under the outdoor illumination environment, the sky brightest and the state that the glare is less; the sight footpath is formed by sequentially reflecting the ceiling light spot area, the ceiling surface, the wall surface and the working surface, so that the sight of a user can move to the ceiling surface with high illumination and even the light spot area without obstacles at any time, the environment of outdoor illumination is successfully simulated, and the sight footpath has better practicability.

The utility model discloses mainly realize through following technical scheme:

a lighting system for preventing and controlling myopia comprises a lighting space, a light source device and a working surface arranged in the lighting space; the lighting space comprises a ceiling surface, a ground surface and wall surfaces on the periphery, a light source device is arranged in the center of the ceiling surface, a light source of the light source device irradiates on the ceiling surface and forms a ceiling light spot area, and emitted light is reflected step by step sequentially through the ceiling surface and the wall surfaces, and finally preset illumination is formed on the working surface; the maximum illuminance value in the ceiling facula area is greater than or equal to 10000 lux, and the sum of the illuminance of each plane of the illumination space averagely exceeds 1500 lux. The peripheral side of the illumination space is provided with 4 wall surfaces which are connected with each other.

In order to better realize the utility model, furthermore, the reflectivity of the ceiling surface, the wall surface and the ground is respectively 72 to 85 percent, 65 to 80 percent and 30 to 50 percent; the working surface is set to be 0.70-0.75 meter away from the ground.

In order to better realize the utility model, furthermore, the smallpox light spot area is the brightest area which is equivalent to 6.8 times to 9 times of the area of the light outlet of the light source device in the ceiling surface right above the light source device.

In order to better realize the utility model discloses, furtherly, the average illuminance ratio of smallpox light spot district and working face is 12 > LS/WP > 10, the average illuminance ratio of smallpox light spot district and smallpox face is 2 < LS/CL < 2.5, the average illuminance ratio of smallpox face and wall is 4.5 < CL/WL < 5, the average illuminance ratio of wall and working face is 0.8 < WL/WP < 1.2, the average illuminance ratio of working face and ground is WP/FL < 2.

In order to better realize the utility model, further, if the maximum illumination of the sky-flower light spot area is equal to 10000 lux and the average illumination is 5000 lux, the average illumination of the sky-flower surface, the wall surface, the working surface and the ground is 2000 lux 2500 lux, 400 lux 555 lux, 416 + 500 lux and 208 + 250 lux respectively.

The utility model discloses in the use, light source device hoists at the middle part of ceiling face, light source device produces specific illuminance spatial distribution through the light source and the lens that inside set up, is the prerequisite of simulation outdoor illumination environment. The setting of the spatial distribution of the illuminance is as follows:

first, the light source device generates a certain area of light spots of a certain area of a certain mulches on a ceiling surface right above, which are two factors for simulating high-luminance illuminance, brightest sky and small glare in an outdoor lighting environment to suppress elongation of an eye axis.

Secondly, the light emitted to the ceiling by the light source device is reflected by the ceiling and the wall to reduce the illumination level step by step, and finally the illumination of hundreds of luxes is formed on the working surface. Such an illuminance of several hundred lux is very suitable for work activities such as learning and work such as reading and writing.

Thirdly, a sight path connecting the ceiling light spot area, the ceiling surface, the wall surface and the working surface is established simultaneously from the ceiling surface to the wall surface and then from the working surface to the specific illumination space distribution which is reduced step by step. The sight-line footpath enables the sight line of a user to move to a high-illumination ceiling surface or even a spot area without obstruction at any time. This "anytime" is an important feature that helps the user accumulate time for activities that correspond to outdoor lighting conditions through normal use.

The specific setting of the specific illuminance spatial distribution is as follows:

a. illumination spatial distribution:

(1) a Working Plane (WP) 0.75 meters above ground; (2) a ceiling surface (CL) which is a top surface of the enclosed space; (3) a ceiling light spot area (LS) which is positioned in the brightest area which is 2.5 times of the area of a light outlet of the lighting fixture in the ceiling surface right above the lighting fixture; (4) the wall surface (WL) is four side surfaces of the enclosed space; (5) the Floor (FL) is the bottom surface of the enclosed space.

b. The range of values of the ratio of the average illuminance of five key planes or areas in the illumination spatial distribution: 12 > LS/WP > 10; (2) LS/CL is more than 2 and less than 2.5; (3) CL/WL is more than 4.5 and less than 5; (4) WL/WP is more than 0.8 and less than 1.2; (5) WP/FL < 2.

c. The maximum illumination value in the ceiling light spot area (LS) is more than or equal to 10000 lux and is the maximum value of the illumination in the indoor space. These illuminance values of 10000 lux or more are used to simulate high illuminance under outdoor lighting conditions, and are one of the key conditions for myopia prevention and control action to suppress elongation of the eye axis.

The illuminance value above 10000 lux is taken as the maximum value of the illuminance in the indoor space, gradually rises from the working surface to the wall surface and then to the ceiling surface, and is the peak of the sight path which is sequentially connected with the working surface, the wall surface, the ceiling surface and the ceiling facula area. The user's line of sight can be moved from the work surface (WP) to the apex at any time and without obstruction along the "line of sight path". The vision path formed by the gradient formed by the specific illumination space distribution and connected in parallel is the second key condition of the utility model for realizing the function of preventing and controlling myopia by inhibiting the elongation of the eye axis.

If the maximum illuminance value in the lighting spot area of the ceiling is 10000 lux and the average illuminance is 5000 lux, according to the ratio in b, the average illuminance of the ceiling surface CL is 2000-2500 lux, the wall surface WL is 400-555, the working surface WP is 416-500 lux, and the floor surface FL is 208-250 lux.

An average illuminance value of the working surface WP of more than 450 lux is a preferred illuminance for learning such as reading and writing and working surfaces. The illuminance 2000-2500 lux of the ceiling surface CL and the illuminance 400-555 lux of the wall surface WL in the middle are two important 'steps' which are necessary for connecting two functional planes, namely the ceiling surface CL and the working surface WP, so that a 'sight path' which is the second key condition for preventing and controlling the myopia can be formed.

In order to better realize the utility model, 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 value of the total luminous flux of the light source device after light distribution is 5000 lumens; when the indoor area of the illumination space is larger than 5 square meters and the indoor height is smaller than or equal to 3.5 meters, the total luminous flux of the light source device is as follows:

Φ = {5000+ [5000/(5 x indoor height)](indoor area and indoor height) a (85%/R)_{Ceiling (ceiling)})+b(80%/R_{Wall surface})+c(60%/R_{Working surface})+d(30%/R_{Ground surface})]}/(∑Tr_1-nN) + irregular spatial empirical compensation

Wherein:

R_{ceiling (ceiling)}Is the reflectivity of the ceiling surface,

R_{wall surface}Is the reflectivity of the wall surface,

R_{working surface}Which is the reflectivity of the working surface,

R_{ground surface}Is a reflection rate of the ground surface and,

∑Tr_1-nis the sum of the light transmittances of the lenses used in the light source device,

n is the number of the lens types,

∑Tr_1-nthe/n is the average light transmittance of the lens used in the light source device,

a is a ceiling reflection weight coefficient,

b is a wall reflection weight coefficient,

c is the reflection weighting factor of the working surface,

d is a ground reflection weight coefficient,

a+b+c+d=1。

in order to better realize the utility model discloses, furtherly, light source device includes the body and sets up the non-light tight dust guard at the body top, the inside of body is provided with compound light source board, the light source board is joined in marriage the light zone including the A district that sets gradually from interior to exterior, the B district joins in marriage the light zone, the C district joins in marriage the light zone, the A district grading district adopts spotlight type lens, the B district grading district adopts wide angle type lens, the C district grading district adopts backlight type lens.

In order to realize better the utility model discloses, furtherly, the A district grading district is provided with annular inner circle LED module, the B district grading district has set gradually annular second circle LED module, third circle LED module from interior to exterior, the C district grading district has set gradually annular fourth circle LED module, outer lane LED module from interior to exterior.

In order to better realize the utility model, further, the light source device is hung 20-50 cm away from the ceiling surface; preferably, the distance between the light source device and the wall body is controlled to be 1-2.3 meters, and the distance between the light source device and the ceiling surface is 35 centimeters.

In order to better realize the utility model, furthermore, the light distribution curve of the light source device is a symmetrical large wide-angle batwing light distribution curve, the beam angle is 165-170 degrees, and the angle corresponding to the maximum light intensity value is 22-30 degrees; the light distribution curve can effectively realize that the light source device sequentially corresponds to a ceiling light spot area, a ceiling surface inner area, a ceiling surface outer area and a wall surface top 15-25cm area from inside to outside to generate light with light intensity angles of 22 degrees, 35 degrees, 50 degrees and 75 degrees.

The light distribution curve of the light source device is shown in fig. 7, and the light distribution shape will accurately generate a specific illuminance spatial distribution on each target plane or region. The light distribution curve of a common ceiling lamp is a wide-sphere light distribution curve, the angle corresponding to the maximum light intensity value is generally 0-15 degrees, the beam angle is generally 120-130 degrees, light rays are mainly gathered in the front of the light emitting surface, the light rays on two sides are few, the illumination at the edge of the working face is relatively weak, and the uniformity of the working face is further low. Generally, a light distribution curve of a common indirect light is a narrow spherical light distribution curve, an angle corresponding to a maximum light intensity value of the common indirect light is generally 0-10 degrees, a beam angle is generally 90-100 degrees, light rays are mainly concentrated in front of a light emitting surface, and light rays on two sides are too few, so that a narrow and strong local light spot is generated on a working surface, and further the uniformity of the working surface is too low. Particularly, the light source device is hung 20-50 cm away from the ceiling surface. Preferably, the distance between the light source device and the wall body is controlled to be 1-2.3 meters, and the distance between the light source device and the ceiling surface is 35 centimeters. The utility model discloses a grading curve is "big wide angle bat wing grading curve of symmetry type", and the angle that its maximum light intensity value corresponds is 22 to 30, and the beam angle is 165 to 170, and light can increase substantially to diffusion all around, and the light intensity of each direction increases along with the increase of beam angle, makes the illuminance of working face edge still sufficient, further promotes the degree of consistency of working face.

In order to better realize the utility model, furthermore, the A-area light distribution area, the B-area light distribution area and the C-area light distribution area are arranged at intervals, and the interval between the A-area light distribution area and the B-area light distribution area is controlled between 6.5cm and 7 cm; the distance between the B-region light distribution area and the C-region light distribution area is controlled between 7cm and 7.3 cm.

In order to better realize the utility model, furthermore, the interval between the lenses of the A-area light distribution area is more than or equal to 5mm and less than or equal to 8 mm; the interval between the lenses of the B-area light distribution area is greater than or equal to 6mm and less than or equal to 10 mm; the interval between the lenses of the C-region light distribution area is greater than or equal to 8mm and less than or equal to 12 mm.

The light distribution areas of the area A, the area B and the area C are arranged at intervals, the light distribution effect is ensured as much as possible according to the heat dissipation requirement, the corresponding requirement is made, and the interval between the light distribution areas of the area A and the light distribution areas of the area B is controlled to be 6.5 cm-7 cm. The distance between the light distribution area in the area B and the light distribution area in the area C is controlled to be 7cm to 7.3 cm; importantly, the interval between the lenses between the light distribution areas of the area A is required to be more than 5mm and not more than 8 mm; importantly, the interval between the lenses between the light distribution areas of the B area is more than 6mm and not more than 10 mm; importantly, the interval between the lenses between the light distribution areas of the C area is more than 8mm and not more than 12 mm.

In order to better realize the utility model discloses, furtherly, the district is joined in marriage the light zone in B district, the mutual interval setting in the district is joined in marriage to C district, and the district is joined in marriage to A district, the district is joined in marriage the LED power area ratio of light zone, the district is joined in marriage to B district, the district is joined in marriage to C district and is 0.135-0.179 watts/square centimeter, 0.215-0.287 watts/square centimeter, 0.072-0.096 watts/square centimeter respectively.

In order to realize better the utility model discloses, furtherly, the bottom of light source board is through heat dissipation mechanism and this body coupling, heat dissipation mechanism includes from last to setting gradually heat-conducting plate, the heating panel inside the body down.

In order to realize better the utility model discloses, furtherly, the body is including side shell, drain pan, the light source board passes through the bottom plate and installs on the side shell, be provided with the heat-conducting plate between light source board and the bottom plate, the upper and lower both ends of bottom plate are provided with heat-conducting plate, heating panel respectively.

In order to realize better the utility model discloses, furtherly, the heat conduction groove intercommunication that week side of side shell and week side of drain pan correspond the heat-conducting plate respectively is provided with a plurality of aerodynamic groove, week side of bottom plate corresponds aerodynamic groove and is provided with the intercommunicating pore, and the middle part is provided with and link up the groove, be provided with the circulation groove between heating panel and the bottom plate, and the interval sets up between heating panel and the drain pan, the heat conduction groove, link up groove, circulation groove communicate in proper order.

The light source device is hung and arranged 20-50 cm away from the ceiling surface; preferably, the distance between the light source device and the wall body is controlled to be 1-2.3 meters, and the distance between the light source device and the ceiling surface is 35 centimeters. Further, a low-noise axial-flow heat radiation fan is arranged below the light source plate; the utility model discloses a setting of aerodynamic groove realizes that the aerodynamic groove of air edgewise, bottom surface week side flows in the heat-conducting groove at heat-conducting plate middle part, and then flows in the radiating groove downwards, forms the circulation of air, and then takes away the heat, has realized light source device's heat dissipation, if add the axial fan heat dissipation again, under the indoor temperature is no longer than 40 ℃, can realize with LED lamp pearl surface temperature control within 58 ℃, further improve the reliability, have better practicality.

The utility model has the advantages that:

(1) the utility model discloses upwards shine the ceiling with the light source, produce the facula of certain area on the ceiling of light source device's top, high luminance illuminance, the brightest sky and the less state of glare under the outdoor illumination environment of effective simulation; the sight footpath is formed by sequentially reflecting the ceiling light spot area, the ceiling surface, the wall surface and the working surface, so that the sight of a user can move to the ceiling surface with high illumination and even the light spot area without obstacles at any time, the outdoor illumination environment is successfully simulated, and the practicability is better;

(2) the utility model sets the maximum illumination value in the ceiling spot area to be more than or equal to 10000 lux, thereby effectively simulating the high-brightness illumination, the brightest sky and the state with less glare under the outdoor illumination environment; the light emitted to the ceiling surface by the light source device is reflected by the ceiling surface and the wall surface to reduce the illumination level step by step, and finally the illumination level of hundreds of luxes is formed on the working surface to form a sight path, so that the sight of a user can move to the ceiling surface with high illumination level and even a spot area without obstacles at any time, the outdoor illumination environment is effectively simulated indoors, and the outdoor illumination device has better practicability;

(3) the utility model discloses upwards shine the ceiling with the light source, produce the facula of certain area on the ceiling of light source device's top, high luminance illuminance, the brightest sky and the less state of glare under the outdoor illumination environment of effective simulation; the light distribution area A, the light distribution area B and the light distribution area C generate specific illumination space distribution through the matching of the light source and the lens, so that the outdoor illumination environment can be effectively simulated indoors, and the practicability is better;

(4) the utility model discloses a A district is joined in marriage light zone, B district and is joined in marriage light zone, C district and join in marriage light zone interval setting to and each join in marriage the setting of light zone LED power area ratio and satisfy the prerequisite of simulating outdoor illumination environment under, realize effectively dispelling the heat, have better practicality;

(5) the utility model discloses a setting of aerodynamic groove realizes that the aerodynamic groove of air edgewise, bottom surface week side flows in the heat-conducting groove at heat-conducting plate middle part, and then flows in the radiating groove downwards, forms the circulation of air, and then takes away the heat, has realized light source device's heat dissipation, under the indoor temperature is no longer than 40 ℃ the condition, can realize with LED lamp pearl surface temperature control within 68 ℃, has better practicality.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a cross-sectional view of a light source device;

fig. 4 is a three-dimensional exploded view of the present invention;

FIG. 5 is a schematic structural diagram of arrangement of beads on a light source board;

FIG. 6 is a schematic of a region of a spatial light environment;

FIG. 7 is a light distribution graph of the light source device;

fig. 8 is an analytic graph of the relationship between the light distribution curve and the light bead arrangement array on the light source plate;

FIG. 9 is an anti-glare schematic of an illumination system;

fig. 10 is a schematic structural diagram of an illumination system.

Wherein: 1. side shell, 2, aerodynamic groove, 3, dust guard, 4, drain pan, 5, heating panel, 8, drive power supply, 9, the heat-conducting plate, 10, the bottom plate, 11, low noise axial fan, 15, the jib, 16, go up coupling assembling, 17, lower coupling assembling, 19, the light source board, 25, backlight type lens, 26, wide angle type lens, 27, spotlight type lens, 29, inner circle LED module, 30, second circle LED module, 31, third circle LED module, 32, fourth circle LED module, 33, outer lane LED module, 35, smallpox light spot district, 36, smallpox face, 37, the wall, 38, the working face, 39, the sight pavement.

Detailed Description

Example 1:

an illumination system for preventing and controlling myopia, as shown in fig. 9 and 10, comprises an illumination space, a light source device and a working surface 38 arranged inside the illumination space; the lighting space comprises a ceiling surface 36, a ground surface and peripheral wall surfaces 37, a light source device is arranged in the center of the ceiling surface 36, a light source of the light source device irradiates on the ceiling surface 36 and forms a ceiling light spot area 35, emitted light is reflected step by step sequentially through the ceiling surface 36 and the wall surfaces 37, and finally preset illumination is formed on a working surface 38; the maximum illuminance value in the sky flower speckle region 35 is greater than or equal to 10000 lux, and the sum of the illuminance of each plane of the illumination space averagely exceeds 1500 lux.

Furthermore, the reflectivity of the ceiling 36, the wall 37 and the ground is 72-85%, 65-80% and 30-50% respectively. The work surface 38 is set 0.70-0.75 meters off the ground.

The utility model discloses upwards shine ceiling 36 with the light source, produce the facula of certain area on ceiling 36 above the light source device, high luminance illuminance, the brightest sky and the less state of glare under the outdoor illumination environment of effective simulation; the sight footpath 39 is formed by sequentially reflecting the ceiling light spot area 35, the ceiling surface 36, the wall surface 37 and the working surface 38, so that the sight of a user can move to the ceiling surface 36 with high illumination and even the light spot area without obstacles at any time, the outdoor illumination environment is successfully simulated, and the practicability is better.

The utility model sets the maximum illumination value in the sky pattern light spot area 35 to be more than or equal to 10000 lux, thereby effectively simulating the high-brightness illumination, the brightest sky and the state with less glare under the outdoor illumination environment; the light emitted to the ceiling surface 36 by the light source device is reflected by the ceiling surface 36 and the wall surface 37 to reduce the illumination level step by step, and finally the illumination of hundreds of luxes is formed on the working surface 38 to form the sight footpath 39, so that the sight of a user can move to the ceiling surface 36 with high illumination level and even a spot area without obstacles at any time, the outdoor illumination environment is effectively simulated indoors, and the outdoor illumination device has better practicability.

Example 2:

the embodiment is optimized on the basis of embodiment 1, the average illumination ratio of the small ceiling light spot area 35 to the working surface 38 is 12 > LS/WP > 10, the average illumination ratio of the small 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.

Further, as shown in fig. 10, the average illuminance ratio of the small ceiling light spot area 35 to the working surface 38 is 11, the average illuminance ratio of the small ceiling light spot area 35 to the ceiling surface 36 is 2, the average illuminance ratio of the ceiling surface 36 to the wall surface 37 is 4.8, and the average illuminance ratio of the wall surface 37 to the working surface 38 is 1.

Further, if the maximum illumination of the ceiling light spot area 35 is 10000 lux and the average illumination is 5000 lux, the average illumination of the ceiling 36, the wall 37, the working surface 38 and the floor is respectively 2000 + 2500 lux, 400 + 555 + 500 lux, 416 + 250 lux.

Other parts of this embodiment are the same as embodiment 1, and thus are not described again.

Example 3:

the embodiment is optimized on the basis of embodiment 1 or 2, when the indoor area of the illumination 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 a light source of the light source device after light distribution is 5000 lumens; when the indoor area of the illumination space is larger than 5 square meters and the indoor height is smaller than or equal to 3.5 meters, the total luminous flux of the light source device is as follows:

Wherein:

R_{ceiling (ceiling)}Is the reflectivity of the ceiling surface,

R_{wall surface}Is the reflectivity of the wall surface,

R_{working surface}Which is the reflectivity of the working surface,

R_{ground surface}Is a reflection rate of the ground surface and,

n is the number of the lens types,

a is a ceiling reflection weight coefficient,

b is a wall reflection weight coefficient,

c is the reflection weighting factor of the working surface,

d is a ground reflection weight coefficient,

a+b+c+d=1。

The rest of this embodiment is the same as embodiment 1 or 2, and therefore, the description thereof is omitted.

Example 4:

the embodiment is optimized on the basis of any one of embodiments 1 to 3, as shown in fig. 1 and 2, the light source device includes a body and a transparent dust-proof plate 3 arranged on the top of the body, a composite light source plate 19 is arranged inside the body, 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 sequentially arranged from inside to outside, and the a-zone light distribution area adopts a condensing lens 27 and can condense light rays in the front; the light distribution area in the area B adopts a wide-angle lens 26, so that light rays can be uniformly distributed in the right front direction; the light distribution area of the C area adopts a backlight type lens 25, light can be refracted to two sides in a wide angle, and the light intensity in the range near a 0-degree beam angle is low.

Further, as shown in fig. 8, the light distribution area a is provided with an annular inner ring LED module 29, the light distribution area B is provided with an annular second ring LED module 30 and an annular third ring LED module 31 in sequence from inside to outside, and the light distribution area C is provided with an annular fourth ring LED module 32 and an annular outer ring LED module 33 in sequence from inside to outside.

Further, as shown in fig. 9 and 10, the light source device is hung 20-50 cm below the ceiling surface 36; preferably, the light source device is hung 35 cm below the ceiling surface 36, and the distance from the light source device to the wall body is controlled to be 1-2.3 m.

Further, as shown in fig. 7 and 8, the utility model discloses a light distribution curve is "big wide angle bat wing light distribution curve of symmetry type", and the angle that its maximum light intensity value corresponds is 22 to 30, and the beam angle is 165 to 170, and light can increase substantially to diffusing all around, and the light intensity of each direction increases along with the increase of beam angle, makes the illuminance of working face edge still sufficient, further promotes the degree of consistency of working face.

Further, a ray having a light intensity angle of 22 ° (i.e., 22 ° in fig. 8) can support the ceiling spot region 35 (LS region).

Further, a ray of light intensity angle 35 (i.e., 35 in FIG. 8) can support the inside of the ceiling 36 (CL area), i.e., the ceiling area away from the wall.

Further, light rays having a light intensity angle of 50 ° (i.e., 50 ° in fig. 8) can support the outside of the ceiling surface 36 (CL region), i.e., the ceiling region near the wall.

Further, light rays having a light intensity angle of 75 ° (i.e., 75 ° in fig. 8) can support the high (vertical extent of about 20 cm) of the wall surface 37 (WL region).

The light distribution of the utility model is to spread the beam angle greatly, make full use of the two areas of the ceiling (main) and the wall (secondary) in the space, and scatter the light disorderly through the diffuse reflection layer (such as white lime) of the surface materials of the ceiling and the wall, so that the light becomes soft enough.

Generally, compared with common ceiling lamps, the utility model discloses its light that arrives working face 38 experiences diffuse reflection number of times at least "n + 1" (wherein, n is the light diffuse reflection number of times of common ceiling lamp), namely all light 100% that arrives working face 38 all are diffuse reflection light, and the light that arrives working face 38 in common ceiling lamp is generally only 30% to 40% diffuse reflection light; the utility model discloses the mild sunlight that the multiple diffuse reflection of sunlight produced in the tiny granule of cloud cover and atmosphere has been simulated.

Due to the complex requirement of specific illumination spatial distribution, light sources need to be grouped, and each group is used as an independent light source to carry out light distribution on a target area. The light source is divided into three independent light distribution areas, namely an area A light distribution area, an area B light distribution area and an area C light distribution area, lenses used in each area are different, and independent sub-areas can be continuously subdivided in each area. As shown in fig. 6, the light distribution area in the area a is near-end light distribution of the spot area LS and the ceiling area CL, and is general basic light distribution when the space floor area is 5 square meters, and the light distribution area in the area a realizes light emission through the inner-ring LED module 29. The light distribution area in the area B is a transition and uniformity buffer adjustment area, is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination proportion of the ceiling surface 36 and other planes including the wall surface 37 and the working surface 38, and realizes light emission through the second circle of LED modules 30 and the third circle of LED modules 31. The C-region light distribution area is used for distributing far-end illumination of the ceiling surface 36, meanwhile, the basic illumination proportion of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38 is established, and light emission is achieved through the fourth circle of LED modules 32 and the outer circle of LED modules 33.

The utility model discloses a setting up of inner circle LED module 29, second circle LED module 30, third circle LED module 31, fourth circle LED module 32, outer lane LED module 33 realizes like the grading curve shown in figure 7, figure 8, is favorable to effectively simulating outdoor illumination environment indoor, has better practicality.

Due to the complex requirement of specific illumination spatial distribution, light sources need to be grouped, and each group is used as an independent light source to carry out light distribution on a target area. The light source is divided into three independent light distribution areas, namely an area A light distribution area, an area B light distribution area and an area C light distribution area, lenses used in each area are different, and independent sub-areas can be continuously subdivided in each area. As shown in fig. 7, the light distribution area in the area a is near-end light distribution of the spot area LS and the ceiling area CL, and is a general basic light distribution when the space floor area is 5 square meters, and the light distribution area in the area a employs a condensing lens 27. The light distribution area in the area B is a transition and uniformity buffer adjustment area, is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38, and adopts the wide-angle lens 26. The light distribution area in the area C is used for distributing far-end illumination of the ceiling surface 36, and meanwhile, a basic illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38 is established, and the backlight type lens 25 is adopted.

The utility model discloses upwards shine ceiling 36 with the light source, produce the facula of certain area on ceiling 36 above the light source device, high luminance illuminance, the brightest sky and the less state of glare under the outdoor illumination environment of effective simulation; the light distribution area in the area A, the light distribution area in the area B and the light distribution area in the area C generate specific illumination space distribution through the cooperation of the light source and the lens, the outdoor illumination environment is effectively simulated indoors, and the practicability is good.

Other parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.

Example 5:

the embodiment is optimized on the basis of embodiment 4, the light distribution areas of the area a, the area B and the area C are arranged at intervals, the light distribution effect is ensured as much as possible according to the heat dissipation requirement, the corresponding requirement is made, and the interval between the light distribution areas of the area a and the area B is controlled to be 6.5cm to 7 cm. The distance between the B-region light distribution area and the C-region light distribution area is controlled between 7cm and 7.3 cm.

Further, the interval between the lenses of the A-area light distribution area is greater than or equal to 5mm and less than or equal to 8 mm; the interval between the lenses of the B-area light distribution area is greater than or equal to 6mm and less than or equal to 10 mm; the interval between the lenses of the C-region light distribution area is greater than or equal to 8mm and less than or equal to 12 mm.

Further, the power area ratios of the LEDs in the light distribution area A, the light distribution area B and the light distribution area C are respectively 0.135-0.179 watt/square centimeter, 0.215-0.287 watt/square centimeter and 0.072-0.096 watt/square centimeter.

Further, the light source device adopts an isolation constant voltage DC as a constant current power supply.

Further, as shown in fig. 1 and 2, a suspension rod 15 is disposed at the top of the dust-proof plate 3, an upper connection assembly 16 and a lower connection assembly 17 are respectively disposed at two ends of the suspension rod 15, and the suspension rod 15 is connected with the top of the dust-proof plate 3 through the lower connection assembly 17.

The utility model discloses in the use, through 15 installation light source devices of jib, light source, lens cooperation are passed through to light source device's inside, can produce specific illuminance spatial distribution. The utility model discloses a light source board 19 upwards shines ceiling 36 with the light source with the setting of dust guard 3, produces the facula of a certain area of wanlux on the ceiling 36 directly over the light source device for simulate the less state of hi-lite illuminance, sky brightest and glare under the outdoor lighting environment. This spatial distribution of illumination has a myopia prevention and control effect of suppressing elongation of the eye axis.

The other parts of this embodiment are the same as those of embodiment 4, and thus are not described again.

Example 6:

the present embodiment is optimized on the basis of embodiment 4 or 5, as shown in fig. 3 and 4, the bottom of the light source plate 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.

Further, as shown in fig. 4, a low-noise axial-flow heat radiation fan 11 is disposed between the heat conduction plate 9 and the heat radiation plate 5.

Furthermore, a plurality of aerodynamic grooves 2 are respectively arranged on the side surface and the periphery of the bottom surface of the body, and a heat conducting groove communicated with the aerodynamic grooves 2 is arranged on the heat conducting plate 9.

The utility model discloses in the use, the air flows into the heat-conducting groove at the middle part of heat-conducting plate 9 from the aerodynamic groove 2 of side, bottom surface week side, and then flows in the radiating groove downwards, forms the circulation of air, and then takes away the heat. The light source device irradiates light upwards, the side surface and the bottom surface of the lamp are provided with aerodynamic grooves 2, ambient air is guided to enter a heat conduction plate 9 below a light source plate 19 (a PCB lamp plate) and enter a heat dissipation plate 5 below the heat conduction plate 9, and the heating temperature of an object is reduced.

The rest of this embodiment is the same as embodiment 4 or 5, and therefore, the description thereof is omitted.

Example 7:

Further, the body includes side shell 1, drain pan 4, light source board 19 is installed on side shell 1 through bottom plate 10, be provided with heat-conducting plate 9 between light source board 19 and the bottom plate 10, the upper and lower both ends of bottom plate 10 are provided with heat-conducting plate 9, heating panel 5 respectively.

Further, a plurality of aerodynamic grooves 2 are arranged on the periphery of the side shell 1 and the periphery of the bottom shell 4 in a communicated manner corresponding to the heat conducting grooves of the heat conducting plate 9, communication holes are arranged on the periphery of the bottom plate 10 in a communicated manner corresponding to the aerodynamic grooves 2, a through groove is arranged in the middle of the bottom plate, a circulation groove is arranged between the heat dissipation plate 5 and the bottom plate 10, the heat dissipation plate 5 and the bottom shell 4 are arranged at intervals, and the heat conducting grooves, the through groove and the circulation groove are sequentially communicated with one another.

Further, the light source board 19 is connected to the bottom plate 10 with a thickness not less than 0.4 mm through a connecting column with a total contact area not less than 2% of the area of the LED lamp panel of the light source board 19.

The utility model discloses in the use, the air flows into the heat-conducting groove at the middle part of heat-conducting plate 9 from the aerodynamic groove 2 of side, bottom surface week side, and then flows in the radiating groove downwards, forms the circulation of air, and then takes away the heat. The light source device irradiates light upwards, the side surface and the bottom surface of the lamp are provided with aerodynamic grooves 2, ambient air is guided to enter a heat conduction plate 9 below a light source plate 19 (a PCB lamp plate) and enter a heat dissipation plate 5 below the heat conduction plate 9, and the heating temperature of an object is reduced. In addition, the LED lamp panel is connected to the bottom plate 10 with the thickness of the lamp body not less than 0.4 mm through a connecting column with the total contact area not less than 2% of the area of the LED lamp panel. The measures can control the surface temperature of the LED lamp beads within 68 ℃ under the condition that the indoor air temperature does not exceed 40 ℃.

Example 8:

an illumination system for preventing and controlling myopia, as shown in fig. 9 and 10, comprises an illumination space and a light source device arranged in the illumination space, wherein the illumination space comprises a ceiling surface 36, a surrounding wall surface 37, a ground surface and a working surface 38. The light source device is arranged in the middle of the ceiling surface 36, and the light source device irradiates upwards and forms a ceiling spot area 35 in the middle of the ceiling surface 36.

Further, as shown in fig. 1 to 4, the light source module includes a body and a transparent dust-proof plate 3 disposed at the top of the body, a light source plate 19 is disposed inside the body, the light source plate 19 includes an a-region light distribution region, a B-region light distribution region, and a C-region light distribution region which are sequentially disposed from inside to outside, the a-region light distribution region employs a condensing lens 27, the B-region light distribution region employs a wide-angle lens 26, and the C-region light distribution region employs a backlight lens 25.

The utility model discloses in the use, as shown in fig. 10, the light from light source device to 36 transmission of smallpox face realizes reducing illuminance step by step through smallpox face 36, the reflection of wall 37, finally forms the illuminance of hundreds of luxes on working face 38, and this illuminance scope accords with the illumination standard, is fit for the read-write operation activity. The space distribution of the specific illumination gradually reduced from the ceiling 36 to the wall surface 37 and then to the working surface 38 simultaneously establishes a 'sight-line footpath 39' of the ceiling light spot area 35, the ceiling 36, the wall surface 37 and the working surface 38 which are connected in sequence. The sight-line footpath 39 enables the sight line of the user to move to the high-illumination ceiling 36 or even a spot area without obstruction at any time, and successfully simulates the outdoor illumination environment.

Due to the complex requirement of specific illumination spatial distribution, light sources need to be grouped, and each group is used as an independent light source to carry out light distribution on a target area. The light source is divided into three independent light distribution areas, namely an area A light distribution area, an area B light distribution area and an area C light distribution area, lenses used in each area are different, and independent sub-areas can be continuously subdivided in each area. As shown in fig. 5 and 6, the light distribution area in the area a is near-end light distribution of the spot area LS and the ceiling area CL, and is a general basic light distribution when the space floor area is 5 square meters, and the light distribution area in the area a adopts the condensing lens 27. The light distribution area in the area B is a transition and uniformity buffer adjustment area, is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38, and adopts the wide-angle lens 26. The light distribution area in the area C is used for distributing far-end illumination of the ceiling surface 36, and meanwhile, a basic illumination ratio of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38 is established, and the backlight type lens 25 is adopted.

Further, as shown in fig. 5, the light distribution area a is provided with an annular inner ring LED module 29, the light distribution area B is provided with an annular second ring LED module 30 and an annular third ring LED module 31 in sequence from inside to outside, and the light distribution area C is provided with an annular fourth ring LED module 32 and an annular outer ring LED module 33 in sequence from inside to outside.

As shown in fig. 7 and 8, the light distribution area in the area a is near-end light distribution of the spot area LS and the ceiling area CL, and is a general basic light distribution when the space floor area is 5 square meters, and the light distribution area in the area a realizes light emission through the inner-ring LED module 29. The light distribution area in the area B is a transition and uniformity buffer adjustment area, is used for buffer adjustment of the uniformity of the ceiling surface 36 and adjustment and correction of the illumination proportion of the ceiling surface 36 and other planes including the wall surface 37 and the working surface 38, and realizes light emission through the second circle of LED modules 30 and the third circle of LED modules 31. The C-region light distribution area is used for distributing far-end illumination of the ceiling surface 36, meanwhile, the basic illumination proportion of the ceiling surface 36 to other planes including the wall surface 37 and the working surface 38 is established, and light emission is achieved through the fourth circle of LED modules 32 and the outer circle of LED modules 33.

Furthermore, the light distribution areas of the area A, the area B and the area C are arranged at intervals, and the power area ratios of the LEDs in the light distribution areas of the area A, the area B and the area C are respectively 0.135-0.179 watt/cm, 0.215-0.287 watt/cm and 0.072-0.096 watt/cm.

The utility model discloses in the use, the utility model discloses a plurality of modes carry out the LED heat dissipation. The arrangement of the LED chips on the aluminum substrate with the thickness of 0.1 cm not only meets the light distribution requirement, but also carries out spacing according to the heat dissipation requirement, wherein the LED power area ratio of the area A is 0.135-0.179W/square cm; the power area ratio of the LED in the area B is 0.215-0.287W/cm; the area ratio of the LED power in the C area is 0.072-0.096W/cm.

Further, as shown in fig. 4, the bottom of the light source plate 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 disposed inside the body from top to bottom. And a driving power supply 8 connected to the light source board 19.

Further, the body includes side shell 1, drain pan 4, light source board 19 is installed on side shell 1 through bottom plate 10, be provided with heat-conducting plate 9 between light source board 19 and the bottom plate 10, the upper and lower both ends of bottom plate 10 are provided with heat-conducting plate 9, heating panel 5 respectively. Further, as shown in fig. 2, the bottom case 4 has an arc-shaped structure.

Further, as shown in fig. 4, a suspension rod 15 is disposed at the top of the dust-proof plate 3, an upper connection assembly 16 and a lower connection assembly 17 are respectively disposed at two ends of the suspension rod 15, and the suspension rod 15 is connected with the top of the dust-proof plate 3 through the lower connection assembly 17.

Further, the driving power supply 8 is controlled by a single chip microcomputer, and can be connected with the single chip microcomputer through Bluetooth, a sensor, infrared remote control and the like to realize control. The utility model discloses a LLC switching power supply provides the constant voltage 48 volts of DC of isolation as the constant current power supply.

Further, the light source used by the light source board 19 is a full-spectrum LED with a violet or blue light chip exciting RGB fluorescent powder. A typical color temperature for the light source is 5000K. When color temperature adjustment is needed, two purple light or blue light chips with color temperatures of 3000K and 6500K are adopted to excite a full-spectrum LED chip of RGB fluorescent powder, and color temperature adjustment is realized by changing the light emitting proportions of two different color temperatures. When the color temperature adjustment is performed, the luminous flux of the total output is constant. When dimming, the color temperature output after the two chips with different color temperatures mix light is kept constant.

Example 9:

a lighting system for preventing and controlling myopia is shown in figures 9 and 10 and comprises a lighting space and a light source device arranged in the lighting space, wherein the light source device is hung in the middle of a ceiling surface 36, and the light source device generates specific illumination space distribution through a light source and a lens which are arranged in the lighting space, so that the lighting system is a necessary condition for simulating an outdoor lighting environment. The setting of the spatial distribution of the illuminance is as follows:

first, the light source device generates a certain area of light spots of a certain area of a certain mulches on the ceiling surface 36 directly above, which are two factors for simulating high-luminance illuminance, brightest sky and small glare in an outdoor lighting environment, and are used for suppressing elongation of the eye axis.

Secondly, the light emitted from 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 the illumination of hundreds of luxes is formed on the working surface 38. Such an illuminance of several hundred lux is very suitable for work activities such as learning and work such as reading and writing.

Third, the spatial distribution of the specific illuminance, which decreases stepwise from ceiling 36 to wall 37 to work surface 38, simultaneously establishes a "line of sight path 39" connecting the spot area of ceiling 36, wall 37, and work surface 38. This "sightline" 39 allows the user to move his/her sight to the high-lighted ceiling 36 and thus to the spot area at any time without obstruction. This "anytime" is an important feature that helps the user accumulate time for activities that correspond to outdoor lighting conditions through normal use.

Further, the specific setting of the specific illuminance spatial distribution is as follows:

(1) illumination spatial distribution:

(1) working face 38 (WP), 0.75 meters above ground; (2) a ceiling surface 36 (CL), which is the top surface of the enclosed space; (3) a ceiling spot area 35 (LS) located in a brightest area equivalent to 2.5 times the area of a light outlet of the lighting fixture in a ceiling surface 36 directly above the lighting fixture; (4) wall surfaces 37 (WL) which are four side surfaces of the enclosed space; (5) the Floor (FL) is the bottom surface of the enclosed space.

(2) The range of values of the ratio of the average illuminance of five key planes or areas in the illumination spatial distribution: 12 > LS/WP > 10; (2) LS/CL is more than 2 and less than 2.5; (3) CL/WL is more than 4.5 and less than 5; (4) WL/WP is more than 0.8 and less than 1.2; (5) WP/FL < 2.

(3) The maximum illuminance value in the ceiling spot area 35 (LS) is not less than 10000 lux and is the maximum value of the illuminance in the indoor space. These illuminance values of 10000 lux or more are used to simulate high illuminance under outdoor lighting conditions, and are one of the key conditions for myopia prevention and control action to suppress elongation of the eye axis.

The illuminance value of 10000 lux or more is a maximum value of illuminance in the indoor space, gradually rises from the working surface 38 to the wall surface 37 and then to the ceiling surface 36, and is a vertex of the "sight-line path 39" connecting the working surface 38, the wall surface 37, the ceiling surface 36, and the ceiling spot region 35 in this order. The user's line of sight can move unobstructed from the work surface 38 (WP) to the apex at any time along the "line of sight path 39". The vision path 39 formed by connecting the gradients formed by the specific illumination space distribution is the second key condition of the utility model for preventing and controlling the myopia by inhibiting the elongation of the eye axis.

Further, if the maximum illuminance value in the ceiling flare area 35 is 10000 lux and the average illuminance is 5000 lux, according to the ratio in b, it can be obtained that the average illuminance of the ceiling surface 36CL is 2000 + 2500 lux, the wall surface 37WL is 400 + 555, the working surface 38WP is 416 + 500 lux, and the ground surface FL is 208 + 250 lux.

An average illuminance value of the working surface 38WP of more than 450 lux is a preferred illuminance for the working surface 38 for learning such as reading and writing. The illuminance 2000-2500 lux of the ceiling surface 36CL and the illuminance 400-555 lux of the wall surface 37WL in the middle are two important 'steps' which are indispensable for connecting two functional planes, namely the ceiling surface 36CL and the working surface 38WP, so that a 'sight-line footpath 39' which is the second key condition for preventing and controlling the myopia can be formed.

Furthermore, the light source of the light source device is a full-spectrum LED which excites the RGB fluorescent powder by a purple light or blue light chip. A typical color temperature for the light source is 5000K. After the light source is subjected to light distribution, the minimum value of total luminous flux is 5000 lumens, the corresponding area is 5 square meters, the height is less than 3.5 meters, and the reflectivity of a ceiling surface 36, a wall surface 37, a working surface 38 and the ground is equal to 85%, 80%, 60% and 30% of that of the indoor space.

Further, when the indoor area is more than 5 square meters, the relationship between the luminous flux required to be increased and the indoor space area is calculated according to the following formula when the indoor height is less than 3.5 meters:

Wherein:

R_{ceiling (ceiling)}Is the reflectivity of the ceiling surface,

R_{wall surface}Is the reflectivity of the wall surface,

R_{working surface}Which is the reflectivity of the working surface,

R_{ground surface}Is a reflection rate of the ground surface and,

n is the number of the lens types,

a is a ceiling reflection weight coefficient,

b is a wall reflection weight coefficient,

c is the reflection weighting factor of the working surface,

d is a ground reflection weight coefficient,

a+b+c+d=1。

further, when color temperature adjustment is needed, the full-spectrum LED chip of the RGB fluorescent powder is excited by adopting two purple light or blue light chips with color temperatures of 3000K and 6500K respectively, and color temperature adjustment is realized by changing the light emitting proportions of two different color temperatures. When the color temperature adjustment is performed, the luminous flux of the total output is constant.

When dimming, the color temperature output after the two chips with different color temperatures mix light is kept constant.

Further, the light source device adopts combined light distribution of a plurality of groups of light sources to realize specific illumination space distribution.

The light distribution curve of the light source device is shown in fig. 7, and the light distribution shape will accurately generate a specific illuminance spatial distribution on each target plane or region. Because the utility model discloses specific illuminance spatial distribution's complicated requirement must be grouped the light source, and every group carries out the grading to the target area as independent light source.

As shown in fig. 5 and 6, the light source is divided into A, B, C independent light distribution areas, each area uses different lenses, and each area can be further subdivided into independent subregions. The area A is near-end light distribution of a spot area LS and a ceiling area CL, is general basic light distribution when the space ground area is 5 square meters, and adopts a condensing lens 27. The area B is a transition and uniformity buffer adjustment area and is used for buffer adjustment of the uniformity of the ceiling surface 36CL and adjustment and correction of the illumination ratio of the ceiling surface 36CL to other planes including the wall surface 37WL and the working surface 38WP, and the wide-angle lens 26 is adopted. The region C is used for distributing the far-end illumination of the ceiling surface 36, and meanwhile, the basic illumination ratio of the ceiling surface 36CL to other planes including the wall surface 37WL and the working surface 38WP is established, and the backlight type lens 25 is adopted.

Further, heat dissipation of the light source device:

the arrangement of the LED chips on the aluminum substrate with the thickness of 0.1 cm not only meets the light distribution requirement, but also carries out spacing according to the heat dissipation requirement, wherein the LED power area ratio of the area A is 0.135-0.179W/square cm; the power area ratio of the LED in the area B is 0.215-0.287W/cm; the area ratio of the LED power in the C area is 0.072-0.096W/cm.

Further, as shown in fig. 3 and 4, the lighting device of the present invention is upward illuminated, and the aerodynamic grooves 2 are disposed on the side and bottom of the lamp to guide ambient air to enter the heat conducting plate 9 below the light source plate 19 (PCB lamp panel, aluminum substrate material) and enter the heat dissipating plate 5 below the heat conducting plate 9, so as to reduce the heating temperature of the object. In addition, the LED lamp panel is connected to the bottom plate 10 with the thickness of the lamp body not less than 0.4 mm through a connecting column with the total contact area not less than 2% of the area of the LED lamp panel. The measures can control the surface temperature of the LED lamp beads within 68 degrees under the condition that the indoor air temperature does not exceed 40 degrees.

Further, power supply and dimming of the light source device:

further, the light source device adopts an LLC switching power supply to provide an isolated constant voltage 48V DC as a constant current power supply.

Further, the dimming adopts an AM and PWM mixed dimming mode, the PWM dimming is adopted in the range of 1-30% of luminous flux, and the AM dimming is adopted in the range of 31% -100% of luminous flux. The color temperature remains constant during dimming. The illuminance remains constant during the toning process, in particular at the upper and lower end points of the color temperature.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.

Claims

1. The lighting system for preventing and controlling myopia is characterized by comprising a lighting space, a light source device and a working surface arranged in the lighting space; the lighting space comprises a ceiling surface, a ground surface and wall surfaces on the periphery, a light source device is arranged in the center of the ceiling surface, a light source of the light source device irradiates on the ceiling surface and forms a ceiling light spot area, and emitted light is reflected step by step sequentially through the ceiling surface and the wall surfaces, and finally preset illumination is formed on the working surface; the maximum illuminance value in the ceiling facula area is greater than or equal to 10000 lux, and the sum of the illuminance of each plane of the illumination space averagely exceeds 1500 lux.

2. The lighting system for preventing and controlling myopia according to claim 1, wherein the average illuminance ratio of the variola area to the working surface is 12 > LS/WP > 10, the average illuminance ratio of the variola area to the variola surface is 2 < LS/CL < 2.5, the average illuminance ratio of the variola surface to the wall surface is 4.5 < CL/WL < 5, the average illuminance ratio of the wall surface to the working surface is 0.8 < WL/WP < 1.2, and the average illuminance ratio of the working surface to the ground is WP/FL < 2.

3. A myopia prevention and control illumination system according to claim 1, wherein the reflectivity of the ceiling, wall, and floor are 72% -85%, 65% -80%, 30% -50%, respectively; the working surface is set to be 0.70-0.75 meter away from the ground.

4. A myopia prevention and control lighting system according to any one of claims 1 to 3, wherein 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 device after light distribution is 5000 lumens; when the indoor area of the illumination space is larger than 5 square meters and the indoor height is smaller than or equal to 3.5 meters, the total luminous flux of the light source device is as follows:

Wherein:

R_{ceiling (ceiling)}Is the reflectivity of the ceiling surface,

R_{wall surface}Is the reflectivity of the wall surface,

R_{working surface}Which is the reflectivity of the working surface,

R_{ground surface}Is a reflection rate of the ground surface and,

n is the number of the lens types,

∑Tr_1-nn is lightThe average light transmittance of the lens used in the source device,

a is a ceiling reflection weight coefficient,

b is a wall reflection weight coefficient,

c is the reflection weighting factor of the working surface,

d is a ground reflection weight coefficient,

a+b+c+d=1。

5. the illumination system for preventing and controlling myopia according to claim 1, wherein the light source device comprises a body and a transparent dustproof plate arranged at the top of the body, a composite light source plate is arranged inside the body, the light source plate comprises an area A light distribution area, an area B light distribution area and an area C light distribution area which are sequentially arranged from inside to outside, the area A light distribution area adopts a condensing lens, the area B light distribution area adopts a wide-angle light distribution lens, and the area C adopts a backlight lens.

6. The myopia prevention and control lighting system according to claim 5, wherein the light distribution area A is provided with an annular inner ring LED module, the light distribution area B is sequentially provided with an annular second ring LED module and an annular third ring LED module from inside to outside, and the light distribution area C is sequentially provided with an annular fourth ring LED module and an annular outer ring LED module from inside to outside.

7. An illumination system for preventing and controlling myopia according to claim 5 or 6, wherein the light distribution curve of the light source device is a symmetrical large wide-angle batwing light distribution curve, the beam angle is 165 ° to 170 °, and the maximum light intensity value corresponds to an angle of 22 ° to 30 °; the light source device sequentially corresponds to a ceiling light spot area, a ceiling surface inner side area, a ceiling surface outer side area and a wall surface top 15-25cm area from inside to outside to generate light with light intensity angles of 22 degrees, 35 degrees, 50 degrees and 75 degrees.

8. An illumination system for preventing and controlling myopia according to claim 5 or 6, wherein the light distribution areas A, B and C are spaced from each other, and the power area ratios of the LEDs in the light distribution areas A, B and C are respectively 0.135-0.179 watt/cm, 0.215-0.287 watt/cm and 0.072-0.096 watt/cm.

9. The illumination system for preventing and controlling myopia according to claim 5, wherein the bottom of the light source plate is connected with the body through a heat dissipation mechanism, and the heat dissipation mechanism comprises a heat conduction plate and a heat dissipation plate which are sequentially arranged in the body from top to bottom; the body includes side shell, drain pan, the light source board passes through the bottom plate to be installed on the side shell, be provided with the heat-conducting plate between light source board and the bottom plate, the upper and lower both ends of bottom plate are provided with heat-conducting plate, heating panel respectively.

10. The illumination system according to claim 9, wherein a plurality of aerodynamic grooves are disposed on the side of the side housing and the side of the bottom shell in communication with the heat-conducting grooves of the heat-conducting plate, respectively, the communication holes are disposed on the side of the bottom plate in communication with the aerodynamic grooves, the through groove is disposed in the middle of the bottom plate, the circulation groove is disposed between the heat-dissipating plate and the bottom plate, and the heat-conducting groove, the through groove, and the circulation groove are sequentially in communication with each other.