CN113866865B - Light-adjustable luminous plate suitable for building doors and windows with arc edges - Google Patents
Light-adjustable luminous plate suitable for building doors and windows with arc edges Download PDFInfo
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- CN113866865B CN113866865B CN202111220560.4A CN202111220560A CN113866865B CN 113866865 B CN113866865 B CN 113866865B CN 202111220560 A CN202111220560 A CN 202111220560A CN 113866865 B CN113866865 B CN 113866865B
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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Abstract
The application relates to a light-adjustable luminous plate suitable for building doors and windows with arc edges, wherein the body of the light-adjustable luminous plate is a light-transmitting plate, and the light-transmitting plate comprises at least one arc edge and any straight edge so as to form any closed shape; one or more groups of strip-shaped light sources are arranged on any side or multiple sides of the light-transmitting plate to form unilateral light incidence or multilateral light incidence; each group of strip light source mainly comprises a flexible light strip substrate and a plurality of LED point light sources; one side or two side surfaces of the light-transmitting plate are attached with micron-sized light-adjusting micro-structure lattice points; when the light source emits light, the light enters the light-transmitting plate from the side provided with the strip-shaped light source and is totally reflected and transmitted, and when meeting the light modulation microstructure lattice points, the light is scattered out, so that the doors and windows embedded into the light-transmitting plate emit light uniformly to realize illumination; when the light source is adjusted, the luminous intensity of the light-transmitting plate is changed, so that the indoor illumination intensity is adjusted. The light-transmitting plate is favorable for realizing uniform light emission and dimming of building doors and windows with arc edges.
Description
Technical Field
The application belongs to the field of building materials, and particularly relates to a light-adjustable luminous plate suitable for building doors and windows with arc edges.
Background
Along with the continuous improvement of the intelligent demands of people on buildings, building glass with multifunctional integrated characteristics is gradually favored by the market. In recent years, building luminous glass capable of realizing indoor illumination or adjusting indoor light intensity becomes a research hot spot because the building luminous glass can remarkably improve the comfort level of the home and office environment of people. The function of the building luminous glass for realizing illumination or adjusting indoor light intensity mainly depends on the integration of photoelectric technology, and the luminous glass which is commonly applied to the photoelectric technology in the market at present mainly comprises LED lattice photoelectric glass, LED flat plate illumination glass, liquid crystal dimming glass and the like. The first two types of LED light sources are mainly attached to the surface of the glass substrate, can emit light and adjust the light intensity, and can be applied to building doors and windows to achieve indoor illumination and adjust the indoor light intensity, however, the densely distributed LED light sources bring larger energy consumption, and the ITO transparent electrode wiring is adopted to cause the overall process to be complex and the cost to be too high, so that the LED light sources are restricted to be widely applied to the building field. The liquid crystal dimming glass product can not emit light, and the liquid crystal film is solidified between two pieces of glass, and the glass is changed into transparent or opaque form through electric energy control, so that the indoor light intensity is regulated under the condition of an external light source. However, because such glass has a relatively complex structure and high process requirements, and the liquid crystal film and the glass are integrated into a single structure, once damaged, the glass is not easy to repair, and thus the popularization of the glass in building applications is limited. It is worth noting that the above luminous or light-adjustable glass can be designed only for glass doors and windows with regular shapes such as rectangular and square, and along with the diversified development of building shapes and functions, more and more irregularly shaped doors and windows appear, and doors and windows with arc edges are one type, and the existing luminous or light-adjustable glass products are rarely designed for the shapes of building doors and windows with arc edges.
Disclosure of Invention
The application aims to provide a light-adjustable luminous plate suitable for a building door and window with an arc edge, which is beneficial to realizing uniform light emission and light adjustment of the building door and window with the arc edge.
In order to achieve the above purpose, the application adopts the following technical scheme: the application provides a light-adjustable luminous plate suitable for building doors and windows with arc edges, wherein the body of the light-adjustable luminous plate is a light-transmitting plate, and the light-adjustable luminous plate comprises at least one arc edge and any straight edge so as to enclose any closed shape, and the adjacent edges are not limited by angles; the adjustable light-emitting plate is embedded into a door or window which is adaptive to the shape of the adjustable light-emitting plate; one or more groups of strip-shaped light sources are arranged on any one side or multiple sides of the adjustable light-emitting plate to form single-side light entering or multiple-side light entering; each group of strip-shaped light sources mainly comprises a light strip substrate and a plurality of LED point light sources arranged along the length direction of the light strip substrate, wherein the light strip substrate is a flexible substrate to be attached to the corresponding edge outline; one side or two side surfaces of the light-adjustable luminous plate are attached with micro-scale light-adjustable micro-structure lattice points; when the light source does not emit light, the light-adjustable luminous plate is equal to common glass and is in a transparent state, and the dots of the light-adjustable microstructure are invisible to naked eyes; when the light source emits light, the light enters the light-adjustable light-emitting plate from the edge provided with the strip-shaped light source and is transmitted in a total reflection way, and when meeting the lattice point of the light-adjustable microstructure, the light is scattered out, so that the door frame or the window embedded in the light-adjustable light-emitting plate emits luminous flux matched with the lattice point density, and the light is uniformly emitted to realize illumination; when the luminous flux of the light source is regulated, the luminous intensity of the adjustable light-emitting plate is changed, so that the indoor illumination intensity is regulated.
Further, the dimmable light emitting board is made of an organic material or an inorganic material, the organic material including: one or more of polyethylene, polypropylene, polyethylene naphthalate, polycarbonate, polymethyl acrylate, polymethyl methacrylate, cellulose acetate butyrate, siloxane, polyvinyl chloride, polyvinyl alcohol, polyethylene terephthalate, modified polyethylene terephthalate, polydimethylsiloxane and cycloolefin copolymer; the inorganic material includes: one or more of glass, quartz and transmissive ceramic materials; the refractive index of the adjustable light-emitting plate is larger than that of air, and the transmittance of the adjustable light-emitting plate in a visible light wave band is higher than 90%.
Further, the light-adjusting microstructure dots are distributed in a sparse and dense manner along the different distances away from the strip-shaped light source by destroying the total reflection propagation of light in the light-emitting panel, and are distributed more sparse and dense when being close to the strip-shaped light source, and are distributed more dense when being opposite to the strip-shaped light source, so that the illuminance distribution on the light-emitting surface of the light-emitting panel is controllably changed, and the uniformity of the illuminance distribution on the light-emitting surface is controlled; the manufacturing method of the dimming microstructure lattice point comprises the following steps: screen printing, ink jet printing, laser direct writing or lithography; the material of the light modulation micro-structure lattice point comprises: one or more of scattering particles, dispersing agents, printing ink, UV glue and photoresist are mixed; the diameter of the mesh point of the light-adjusting microstructure is smaller than 100 mu m; the light-adjusting microstructure lattice points are paved on the whole surface of the light-adjusting luminous plate, so that the light-adjusting luminous plate uniformly emits light when the light source is started.
Further, the strip light source and the dimmable light emitting board satisfy the following in size: the thickness of the light-transmitting plate and the luminous size of the light source in the thickness direction of the plate are smaller than the maximum value of the side length of the light-transmitting plate, so that the propagation distance of light in the thickness direction can be ignored; the central wavelength of the strip-shaped light source belongs to a visible light wave band, and the wavelength range is 380nm to 780 nm; the strip-shaped light source is attached to the side edge of the light-transmitting plate, and the distance between the strip-shaped light source and the side edge of the light-transmitting plate is not more than 0.5mm.
Further, the illuminance distribution characteristics of the light emitting surface of the dimmable light emitting board are determined according to the following method:
for the single-side light incidence condition, a reference plane rectangular coordinate system is established by using the light-emitting surface of the light-transmitting plate, and any point on the light-emitting surface has a definite coordinate (x 0 ，y 0 ) Wherein (x) 0 ，y 0 ) The definition domain of the transparent plate is limited in the range of the transparent plate; (x) 1 ，y 1 ) The method comprises the steps of solving the illuminance of a point light source on the light-emitting surface of a light-transmitting plate by utilizing the lambert cosine law and the illuminance inverse square law, and then accumulating or integrating and summing the illuminance of each point light source on the point to obtain the illuminance of any point on the light-emitting surface of the light-transmitting plate;
for the polygonal light incidence condition, calibrating each strip-shaped light source as I i And i is light source serial numbers 1,2 and 3 …, the illumination of a certain point on the light-emitting surface of the light-transmitting plate is obtained by respectively carrying out the processing analysis on the strip light sources on each side, and then the illumination of a certain point on the light-emitting surface of the light-transmitting plate is accumulated to obtain the total illumination of the point on the light-emitting surface, so that the bottom illumination distribution of the polygonal light-entering condition is obtained.
Further, the method for obtaining the illuminance of the light emitting surface of the adjustable light emitting plate specifically comprises the following steps:
s1: a plane rectangular coordinate system is established for the light-emitting surface of the light-transmitting plate, and the coordinate of a point light source on the strip light source is calibrated as (x) 1 ，y 1 ) The coordinates of any point on the light-emitting surface of the light-transmitting plate are marked as (x) 0 ，y 0 ) Defining it as a target point; for building doors and windows with different shapes, the light-emitting surface (x 0 ，y 0 ) Such that (x) 0 ，y 0 ) Each point represented is within the range of the light-transmitting sheet material;
s2: the strip-shaped light source is regarded as multipleThe point light sources are connected, and the linear distance l between the target point and the point light sources is calculated according to the coordinates of the target point on the light-emitting surface of the light-transmitting plate and the coordinates of any point light source 1 And the included angle theta between the direction of the straight line distance of the two and the normal line of the emergent light of the point light source 1 ；
S3: measuring the luminous intensity I of the point light source on the emergent light normal 1 Calculating the included angle theta between the light source and the normal line of the emergent light respectively by using the lambert cosine law 1 Light intensity I in the direction of (2) 1 (θ 1 )，I 1 (θ 1 ) The method meets the following conditions:
I 1 (θ 1 )＝I 1 ·cosθ 1
s4: the point source is obtained by using the inverse square law of illuminance 0 ，y 0 ) Illuminance E at 1 ，E 1 The method meets the following conditions:
s5: let the number of point light sources of the strip light source be n, and calibrate the coordinates of each point light source as (x) i ，y i ) Wherein i is the light source number 1,2,3 …, n, repeating S1 to S4, and finding the point (x 0 ，y 0 ) Illuminance E at i Finally, the point (x 0 ，y 0 ) Sum of illuminance on:
obtaining the illuminance of any point on the light-emitting surface of the light-transmitting plate with single-side light incidence;
when the strip light source is a continuous light source, n is infinite, and integral summation is adopted; for a length W, the light intensity in the normal direction of the emergent light is I 0 Taking differential dw for the length of the continuous light source, and the light intensity of each differential point light source in the normal direction of the emergent light is as follows:
processing each differential point light source dw according to steps S1-S4 to obtain differential illuminance dE of the differential point light source at a certain point on the light-emitting surface of the light-transmitting plate, and integrating the differential illuminance at the point:
E(x 0 ,y 0 )＝∫dE
the illuminance at any point of the light-emitting surface of the light-transmitting plate with single-side light entering can be obtained when the light source is a continuous light source;
s6: for the polygonal light-in model, the illuminance of each strip-shaped light source at one point on the light-emitting surface of the light-transmitting plate is marked as E j Wherein j is the number 1,2,3, …, n of the light source, and each strip light source is processed according to the steps S1-S5 to obtain E j And then accumulating:
the illuminance at any point of the light-emitting surface of the light-transmitting plate with polygonal light incidence can be obtained.
Further, a linear distance l between one of the dots of the dimming microstructure and one of the point light sources on the strip-shaped light source 2 And the unit vector of the normal line of the point light source and the direction of the linear distance between the twoIncluded angle theta between 2 Are functions of coordinates (x, y); wherein l 2 The method meets the following conditions:
θ 2 the method meets the following conditions:
further, the luminous intensity of the single point light source on the strip-shaped light source meets the characteristic of a lambert radiator, and the light intensity distribution meets the cosine law formula:
I θ ＝I 0 ·cosθ
wherein I is 0 Is the light intensity of the light source in the normal direction of the emergent light, I θ Is the light intensity of the light source in the direction with an included angle theta with the normal direction of the emergent light; the light source of the non-lambertian radiator is adopted, and the calculation result is substituted into the formula for definition by corresponding coefficients.
Further, the inverse square law of illuminance satisfies the formula:
wherein E (l) is the illuminance at a distance l from the point light source, and I (θ) is the light intensity of the point light source in a direction of an angle θ with the normal direction of the outgoing light.
Further, the method for determining the distribution of the light-adjusting microstructure lattice points on the light-adjustable luminous plate comprises the following steps: calculating the illuminance of any point on the bottom surface of the light-transmitting plate, measuring the lowest illuminance on the light-emitting surface of the light-transmitting plate, and setting the density distribution of the light-adjusting microstructure lattice points on the light-transmitting plate by referring to the difference between the illuminance of any point and the lowest illuminance, wherein the light-adjusting microstructure lattice point density distribution is specifically as follows:
defining the dot density beta as the ratio of the projected area of the dots in a unit area on the light-emitting surface of the light-transmitting plate to the unit area, wherein beta takes a value between 0 and 1, and the dot density is the maximum value beta 0 ＝1；
Calculating to obtain the illuminance E (x) of any point on the light emergent surface of the light-transmitting plate 0 ，y 0 ) And measuring the minimum illuminance value E on the light emitting surface of the light-transmitting plate min ；
Defining a proportionality coefficient R with a value between 0 and 1 to ensure that the dot density of any point on the light-emitting surface of the light-transmitting plate is beta (x) 0 ,y 0 ) The method meets the following conditions:
β(x 0 ,y 0 )＝R·β 0
wherein R satisfies:
therefore, based on illumination analysis on the light-emitting surface of the light-transmitting plate, the design of the dot density on the light-emitting surface of the light-transmitting plate is finely quantized, so that uniform light-emitting under a door and window light-emitting mode is realized.
Compared with the prior art, the application has the following beneficial effects: the application provides a light-adjustable luminous plate suitable for building doors and windows with arc edges, which is characterized in that LED light sources are arranged into strip-shaped light sources and are placed on the side edges of building glass to serve as independent maintenance with a building glass separating element from the light sources from the viewpoints of reducing energy consumption, improving the structure and reducing maintenance and repair difficulty; the building glass is prefabricated with a micron-sized dimming microstructure lattice according to the design in advance and is molded, when the LED light source is turned off, natural light can enter through the building glass, and the lattice does not influence light transmission; when the LED light source is started, the LED light enters the building glass and is transmitted in a total reflection way, when meeting a microstructure lattice on the building glass, the LED light can be scattered to enable the glass to uniformly emit light, and the luminous intensity can be controlled according to the luminous flux of the LED, so that the functions of indoor illumination of the building glass and indoor light intensity adjustment are realized. In addition, through the fine design of the light-emitting surface illuminance distribution and the net point distribution of the light-transmitting plate with the arc edge, the uniform lighting of the arc-shaped building door and window glass can be realized, and the light-emitting surface illuminance and the light intensity of the light-transmitting plate are ensured to be adjusted to meet the design requirements of building engineering. Therefore, the application has higher practical value and wide application prospect.
Drawings
Fig. 1 is a schematic flow chart of calculating illuminance distribution of a dimmable light emitting board according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of determining the distribution of micro-scale light modulation micro-structure dots on a light-emitting panel according to an embodiment of the present application;
FIG. 3 is a schematic diagram of the illuminance and dot distribution design of a single-side-incident dimmable light-emitting board according to the first embodiment of the present application;
fig. 4 is a schematic diagram of the illuminance and dot distribution design of a dual-side incident light adjustable light emitting panel according to the second embodiment of the present application.
Detailed Description
The application will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The embodiment provides a light-adjustable light-emitting plate suitable for building doors and windows with arc edges, wherein the body of the light-adjustable light-emitting plate is a light-transmitting plate, and the light-adjustable light-emitting plate comprises at least one arc edge and any straight edge so as to enclose any closed shape, and no specific angle constraint exists between each two adjacent edges; the adjustable light-emitting plate is embedded into a door or window which is adaptive to the shape of the adjustable light-emitting plate; one or more groups of strip-shaped light sources are arranged on any one side or multiple sides of the adjustable light-emitting plate to form single-side light entering or multiple-side light entering, and the edges provided with the strip-shaped light sources are polished; each group of strip-shaped light sources mainly comprises a light strip substrate and a plurality of LED point light sources arranged along the length direction of the light strip substrate, wherein the light strip substrate is a flexible substrate to be attached to the corresponding edge outline; one side or two side surfaces of the light-adjustable luminous plate are attached with micro-scale light-adjustable micro-structure lattice points; when the light source does not emit light, the light-adjustable luminous plate is equal to common glass and is in a transparent state, and the dots of the light-adjustable microstructure are invisible to naked eyes; when the light source emits light, the light enters the light-adjustable light-emitting plate from the edge provided with the strip-shaped light source and is transmitted in a total reflection way, and when meeting the lattice point of the light-adjustable microstructure, the light is scattered out, so that the door frame or the window embedded in the light-adjustable light-emitting plate emits luminous flux matched with the lattice point density, and the light is uniformly emitted to realize illumination; when the luminous flux of the light source is regulated, the luminous intensity of the adjustable light-emitting plate is changed, so that the indoor illumination intensity is regulated. If a plurality of sides are provided with a bar-shaped light source, the plurality of sides may dim the flux individually or all together.
In this embodiment, the dimmable light emitting board may be made of an organic material or an inorganic material, the organic material including: one or more of Polyethylene (PE), polypropylene (PP), polyethylene naphthalate (PEN), polycarbonate (PC), polymethyl acrylate (PMA), polymethyl methacrylate (PMMA), cellulose Acetate Butyrate (CAB), silicone, polyvinyl chloride (PVC), polyvinyl alcohol (PVA), polyethylene terephthalate (PET), modified polyethylene terephthalate (PETG), polydimethylsiloxane (PDMS) and cycloolefin copolymer (COC) are mixed; the inorganic material includes: one or more of glass, quartz and transmissive ceramic materials; the refractive index of the adjustable light-emitting plate is larger than that of air, and the transmittance of the adjustable light-emitting plate in a visible light wave band is higher than 90%.
In this embodiment, the dots of the light-adjusting microstructure are distributed in a dense-sparse manner along the different distances away from the strip-shaped light source by destroying the total reflection propagation of the light in the light-emitting panel, and the dots are distributed more sparse and dense when the distance is close to the strip-shaped light source, and the dots are dense when the distance is close to the strip-shaped light source, so as to controllably change the illuminance distribution on the light-emitting surface of the light-emitting panel and control the uniformity of the illuminance distribution on the light-emitting surface; the manufacturing method of the dimming microstructure lattice point comprises the following steps: screen printing, ink jet printing, laser direct writing or lithography; the material of the light modulation micro-structure lattice point comprises: one or more of scattering particles, dispersing agents, printing ink, UV glue and photoresist are mixed; the diameter of the mesh point of the light-adjusting microstructure is smaller than 100 mu m, and the smaller the diameter is, the higher the transparency of the light-transmitting plate is; the light-adjusting microstructure lattice points are paved on the whole surface of the light-adjusting luminous plate, so that the light-adjusting luminous plate uniformly emits light when the light source is started.
In this embodiment, the dimensions of the strip light source and the dimmable light emitting board satisfy: the thickness of the light-transmitting plate and the luminous size of the light source in the thickness direction of the plate are far smaller than the maximum value of the side length of the light-transmitting plate, so that the propagation distance of light rays in the thickness direction can be ignored; the central wavelength of the strip-shaped light source belongs to a visible light wave band, and the wavelength range is 380nm to 780 nm; the strip-shaped light source is attached to the side edge of the light-transmitting plate, and the distance between the strip-shaped light source and the side edge of the light-transmitting plate is not more than 0.5mm. Since the light emitting surface of the LED light source has a certain area, the light emitting dimension of the light source in the thickness direction of the plate is the dimension of the light emitting surface in the thickness direction of the plate.
The illuminance distribution characteristics of the light emitting surface of the adjustable light emitting plate are determined according to the following method:
for the single-side light incidence condition, a reference plane rectangular coordinate system is established by using the light-emitting surface of the light-transmitting plate, and any point on the light-emitting surface has a definite coordinate (x 0 ，y 0 ) Wherein (x) 0 ，y 0 ) The definition domain of the transparent plate is limited in the range of the transparent plate; (x) 1 ，y 1 ) The method comprises the steps of solving the illuminance of a point light source on the light-emitting surface of a light-transmitting plate by utilizing the lambert cosine law and the illuminance inverse square law, and then accumulating or integrating and summing the illuminance of each point light source on the point to obtain the illuminance of any point on the light-emitting surface of the light-transmitting plate;
for the polygonal light incidence condition, calibrating each strip-shaped light source as I i And i is light source serial numbers 1,2 and 3 …, the illumination of a certain point on the light-emitting surface of the light-transmitting plate is obtained by respectively carrying out the processing analysis on the strip light sources on each side, and then the illumination of a certain point on the light-emitting surface of the light-transmitting plate is accumulated to obtain the total illumination of the point on the light-emitting surface, so that the bottom illumination distribution of the polygonal light-entering condition is obtained. The bottom surface refers to the surface where the dot is located, namely the surface opposite to the light emitting surface.
As shown in fig. 1, the method for obtaining the illuminance of the light emitting surface of the dimmable light emitting board includes the following steps:
s1: a plane rectangular coordinate system is established for the light-emitting surface of the light-transmitting plate, and the coordinate of a point light source on the strip light source is calibrated as (x) 1 ，y 1 ) The coordinates of any point on the light-emitting surface of the light-transmitting plate are marked as (x) 0 ，y 0 ) Defining it as a target point; for building doors and windows with different shapes, the light-emitting surface (x 0 ，y 0 ) Such that (x) 0 ，y 0 ) Each point represented is within the range of the light-transmitting sheet material;
s2: the strip-shaped light source is regarded as a plurality of point light sources to be connected, and the linear distance l between the target point and the point light source is calculated according to the coordinates of the target point on the light-emitting surface of the light-transmitting plate and the coordinates of any point light source 1 And the included angle theta between the direction of the straight line distance of the two and the normal line of the emergent light of the point light source 1 ；
S3: measuring the luminous intensity I of the point light source on the emergent light normal 1 Calculating the included angle theta between the light source and the normal line of the emergent light respectively by using the lambert cosine law 1 Light intensity I in the direction of (2) 1 (θ 1 )，I 1 (θ 1 ) The method meets the following conditions:
I 1 (θ 1 )＝I 1 ·cosθ 1
s4: the point source is obtained by using the inverse square law of illuminance 0 ，y 0 ) Illuminance E at 1 ，E 1 The method meets the following conditions:
s5: let the number of point light sources of the strip light source be n, and calibrate the coordinates of each point light source as (x) i ，y i ) Wherein i is the light source number 1,2,3 …, n, repeating S1 to S4, and finding the point (x 0 ，y 0 ) Illuminance E at i Finally, the point (x 0 ，y 0 ) Sum of illuminance on:
obtaining the illuminance of any point on the light-emitting surface of the light-transmitting plate with single-side light incidence;
when the strip light source is a continuous light source, n is infinite, and integral summation is adopted; for a length W, the light intensity in the normal direction of the emergent light is I 0 Taking differential dw for the length of the continuous light source, and the light intensity of each differential point light source in the normal direction of the emergent light is as follows:
processing each differential point light source dw according to steps S1-S4 to obtain differential illuminance dE of the differential point light source at a certain point on the light-emitting surface of the light-transmitting plate, and integrating the differential illuminance at the point:
E(x 0 ，y 0 )＝∫dE
the illuminance at any point of the light-emitting surface of the light-transmitting plate with single-side light entering can be obtained when the light source is a continuous light source;
s6: for the polygonal light-in model, the illuminance of each strip-shaped light source at one point on the light-emitting surface of the light-transmitting plate is marked as E j Wherein j is the number 1,2,3, …, n of the light source, and each strip light source is processed according to the steps S1-S5 to obtain E j And then accumulating:
the illuminance at any point of the light-emitting surface of the light-transmitting plate with polygonal light incidence can be obtained.
Wherein, the linear distance l between one dot of the light modulation microstructure dots and one point light source on the strip-shaped light source 2 And the unit vector of the normal line of the point light source and the direction of the linear distance between the twoIncluded angle theta between 2 Are functions of coordinates (x, y); wherein l 2 The method meets the following conditions:
θ 2 the method meets the following conditions:
the luminous intensity of a single point light source on the strip-shaped light source meets the characteristic of a lambert radiator, and the light intensity distribution meets the cosine law formula:
I θ ＝I 0 ·cosθ
wherein I is 0 Is the light intensity of the light source in the normal direction of the emergent light, I θ Is the light intensity of the light source in the direction with an included angle theta with the normal direction of the emergent light; the light source of the non-lambertian radiator is adopted, and the calculation result is substituted into the formula for definition by corresponding coefficients.
The inverse square law of illuminance satisfies the formula:
wherein E (l) is the illuminance at a distance l from the point light source, and I (θ) is the light intensity of the point light source in a direction of an angle θ with the normal direction of the outgoing light.
Based on the analysis, the method for determining the distribution of the light-adjusting microstructure lattice points on the light-adjustable luminous plate comprises the following steps: calculating the illuminance of any point on the bottom surface of the light-transmitting plate, measuring the lowest illuminance on the light-emitting surface of the light-transmitting plate, and setting the dot density distribution on the light-transmitting plate by referring to the difference between the illuminance of any point and the lowest illuminance. As shown in fig. 2, the design method for the dot distribution of the microstructure on the light-emitting surface of the light-transmitting plate comprises the following steps:
s1: defining the dot density beta as the dot in unit area on the light-emitting surface of the light-transmitting plateThe ratio of the projected area to the unit area, the value of beta is between 0 and 1, and the maximum value beta of the dot density 0 ＝1；
S2: the illuminance of any point is obtained by analyzing the illuminance of the light exit surface of the light-transmitting plate 0 ，y 0 ) And defining the minimum illuminance value of the light emitting surface of the light-transmitting plate as E min ；
S3: defining a proportionality coefficient R with a value between 0 and 1 to ensure that the dot density of any point on the light-emitting surface of the light-transmitting plate is beta (x) 0 ,y 0 ) The method meets the following conditions:
β(x 0 ,y 0 )＝R·β 0
wherein R satisfies:
therefore, the design of the dot density on the light-emitting surface of the light-transmitting plate can be finely quantized based on the illuminance analysis on the light-emitting surface of the light-transmitting plate, and the uniform light-emitting effect under the door and window light-emitting mode can be realized more efficiently.
Specific example 1:
as shown in FIG. 3, the black thin solid line represents a water-drop-shaped building door and window quartz transparent plate consisting of a semicircle and a triangle, and micron-sized light-adjusting micro-structure lattice points are attached to the surface of the transparent plate through screen printing and are paved on the whole surface of the transparent plate. After polishing the arc edge of the water drop-shaped light-transmitting plate, placing an LED luminous light source lamp strip on the arc edge, wherein a lamp strip substrate is a flexible substrate, the lamp strip is attached to the outer contour of the arc edge of the light-transmitting plate, and the distance between the lamp strip and the arc edge is 0.3mm. The central wavelength of the LED luminous light source lamp bar is 450nm, 525nm and 620nm, and the thickness of the light-transmitting plate and the luminous size of the LED luminous light source in the thickness direction of the plate are far smaller than the lengths of the sides of the light-transmitting plate. In addition, the light intensity distribution of the LED light source satisfies the characteristics of a lambertian radiator.
The following steps are used for analyzing the illuminance of the bottom surface of the light-transmitting plate:
s1: two established on the bottom surface of the water drop-shaped light-transmitting plateA rectangular coordinate system, the arc edge placement length of the plate is w 1 Is marked by red lines; coordinates (a) of the point light source in the longitudinal direction of the strip light source 0 ,b 0 ). Because the bar light source is attached to the outer side of the semicircular light-transmitting plate, the coordinates of the point light source satisfy the following conditions:
wherein the radius of the semicircular light-transmitting plate is R. The rectangular coordinates of the point light source are replaced by polar coordinates, namely the point light source coordinates satisfy the following conditions:
wherein the method comprises the steps ofThe angle of clockwise rotation from X-axis by taking the origin as the rotation axis is shown, wherein the corresponding rotation angle of the starting point of the strip-shaped light source is +.>The corresponding angle of the end point is +.>Coordinates (x) of any point on the bottom surface of the transparent plate 0 ,y 0 ) Coordinates (x) 0 ,y 0 ) The value range of the light-transmitting plate is limited to the area surrounded by the black thin solid line representing the light-transmitting plate; unit normal vector of outgoing light normal of strip light sourceVector of point light source pointing to any point on bottom surface of transparent plate along length direction of strip light source +.>Vector->And->Forming an included angle theta. In order to facilitate formula calculation, a two-dimensional rectangular coordinate system is established by taking the center of a semicircle as an origin.
S2: deriving a circular equation satisfied by the strip-shaped light source, and obtaining:
therefore, the tangential slope at the point light source on the strip-shaped light source meets the following conditions:
the tangential slope at the point light source and the normal slope k of the emergent light satisfy the following conditions:
so that the emergent light normal slope k can be satisfied:
thus the unit normal vector of the emergent light normalThe method meets the following conditions:
said vectorThe method meets the following conditions:
wherein the coordinates (a) of the point light source 0 ,b 0 ) Limited to bar-shaped light sources w 1 Is defined within the domain of (c). The theta satisfies the following conditions:
the differential dw representing the point light source in the length direction of the strip light source satisfies:
s3: brightness I of strip light source in emergent light normal direction 0 Differential luminance dI in the normal direction of outgoing light defining differential dw in the length direction of a strip light source 0 It satisfies the following conditions:
the differential luminance dI in the direction at an angle θ to the outgoing light normal direction satisfies:
dI＝cosθ·dI 0
s4: the inverse law of illuminance square indicates that the differential illuminance of the differential point light source on the bottom surface of the transparent plate in the length direction of the strip-shaped light source meets the following conditions:
s5: to any point on the bottom surface of the light-transmitting plate, the illuminance E is the integral of differential illuminance, namely:
the illuminance expression of any point on the bottom surface of the transparent plate can be obtained by substituting the above formulas into operation.
The following is the step of dot design based on the illuminance values obtained by the illuminance analysis:
s1: defining the dot density beta as the projected area of the dots in the unit area on the bottom surface of the light-transmitting plate, wherein the value of beta is between 0 and 1, and the dot density is the maximum value beta 0 ＝1；
S2: the luminance magnitude E (x) 0 ，y 0 ) Defining the minimum illumination value of the bottom surface of the light-transmitting plate as E min ；
S3: defining a proportionality coefficient R with a value between 0 and 1 to ensure that the dot density of any point on the bottom surface of the light-transmitting plate is beta (x) 0 ,y 0 ) The method meets the following conditions:
β(x 0 ,y 0 )＝R·β 0
wherein R satisfies:
therefore, a dot density distribution design diagram based on the illumination of the bottom surface of the light-transmitting plate can be obtained.
Specific example 2:
as shown in FIG. 4, the black thin solid line represents a water-drop-shaped building door and window transparent plate consisting of a semicircle and a triangle, the material of the water-drop-shaped building door and window transparent plate is polymethyl methacrylate, micron-sized light-adjusting microstructure lattice points are attached to the surface of the transparent plate through laser direct writing, and the lattice points are paved on the whole surface of the transparent plate. After polishing two straight edges of the water drop-shaped light-transmitting plate, respectively placing LED luminous light source lamp strips (light sources 1 and 2), wherein a lamp strip substrate is a flexible substrate, and the shape of the lamp strip is attached to the outer contour of the arc edge of the light-transmitting plate. The distance between the lamp strip and the arc edge is 0.2mm. The central wavelength range of the LED luminous light source lamp bar is 450nm, 525nm and 620nm, and the thickness of the light-transmitting plate and the luminous size of the LED luminous light source in the thickness direction of the plate are far smaller than the lengths of the sides of the light-transmitting plate. Further, the light intensity distribution and the like of the LED light-emitting source satisfy lambertian radiator characteristics.
The following steps are used for analyzing the illuminance of the bottom surface of the light-transmitting plate:
s1: establishing a two-dimensional rectangular coordinate system on the bottom surface of the water drop-shaped transparent plate, and respectively placing the transparent plate with the length w at two straight edges 1 、w 2 The strip light sources of (1) and (2) are respectively called as light sources of (1) and (2), and are marked by blue lines; coordinates (a, b) of the point light source in the length direction of the strip light source. The following steps take a number 1 light source as an example, and coordinates of a point light source thereof satisfy:
b＝ka
wherein k represents a length w 1 Is provided. Since the two light sources are symmetrical about the X-axis, the slopes k of the two are opposite numbers to each other. Coordinates (x) of any point on the bottom surface of the transparent plate 0 ,y 0 ) Coordinates (x) 0 ,y 0 ) The value range of the light-transmitting plate is limited to the area surrounded by the black thin solid line representing the light-transmitting plate; the unit normal vector of the emergent light normals of the two strip-shaped light sources is respectively The vectors pointing to any point on the bottom surface of the transparent plate from the point light sources in the length direction of the two strip-shaped light sources are respectively +.> (Vector)And->Each included angle is respectively theta 1 、θ 2 . The coordinates of the left and right end points of the No. 1 light source on the X axis are respectively a 11 、a 12 The coordinates of the left and right end points of the No. 2 light source on the X axis are respectively a 21 、a 22 。
S2: because the straight line where the light source is located has a fixed slope, taking the light source 1 as an example, the unit normal vector is thatIt can be expressed as:
(Vector)can be expressed as:
then cos theta can be obtained 1 Is the value of (1):
wherein the length differential dw of the light source satisfies:
s3: brightness I of No. 1 light source in emergent light normal direction 1 Differential luminance dI in the normal direction of outgoing light defining differential dw in the length direction of a strip light source 1 It satisfies the following conditions:
then is theta with the normal direction of the emergent light 1 In the angular direction, the differential brightness dI of the differential point light source satisfies:
dI＝cosθ 1 dI 1
s4: the inverse law of illuminance square indicates that the differential illuminance of the differential point light source on the length direction of the No. 1 light source at any point on the bottom surface of the light-transmitting plate meets the following conditions:
s5: illuminance E at any point on the bottom surface of the light-transmitting plate 1 Is the integral of the differential illuminance, namely:
the illuminance expression of any point on the bottom surface of the transparent plate can be obtained by substituting the above formulas into operation. Repeating the steps S1-S5 for the light source No. 2 in the same way to obtain the illuminance E of the light source No. 2 at any point on the bottom surface of the light-transmitting plate 2 . Finally, the illumination of the two light sources is added to obtain the total illumination E of any point on the bottom surface of the transparent plate:
E(x 0 ,y 0 )＝E 1 +E 2
the following is the step of dot design based on the illuminance values obtained by the illuminance analysis:
s1: defining the dot density beta as the projected area of the dots in the unit area on the bottom surface of the light-transmitting plate, wherein the value of beta is between 0 and 1, and the dot density is the maximum value beta 0 ＝1；
S2: the luminance magnitude E (x) 0 ，y 0 ) Defining the minimum illumination value of the bottom surface of the light-transmitting plate as E min ；
S3: defining a proportionality coefficient R with a value between 0 and 1 to ensure that the dot density of any point on the bottom surface of the light-transmitting plate is beta (x) 0 ,y 0 ) The method meets the following conditions:
β(x 0 ,y 0 )＝R·β 0
wherein R satisfies:
therefore, a dot density distribution design diagram based on the illumination of the bottom surface of the light-transmitting plate can be obtained.
The above description is only a preferred embodiment of the present application, and is not intended to limit the application in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present application still fall within the protection scope of the technical solution of the present application.
Claims (7)
1. The light-adjustable luminous plate is characterized in that the body of the light-adjustable luminous plate is a light-transmitting plate, and the light-adjustable luminous plate comprises at least one arc edge and any straight edge so as to form any closed shape, and the adjacent edges are not limited by angles; the adjustable light-emitting plate is embedded into a door or window which is adaptive to the shape of the adjustable light-emitting plate; one or more groups of strip-shaped light sources are arranged on any one side or multiple sides of the adjustable light-emitting plate to form single-side light entering or multiple-side light entering; each group of strip-shaped light sources mainly comprises a light strip substrate and a plurality of LED point light sources arranged along the length direction of the light strip substrate, wherein the light strip substrate is a flexible substrate to be attached to the corresponding edge outline; one side or two side surfaces of the light-adjustable luminous plate are attached with micro-scale light-adjustable micro-structure lattice points; when the light source does not emit light, the light-adjustable luminous plate is equal to common glass and is in a transparent state, and the dots of the light-adjustable microstructure are invisible to naked eyes; when the light source emits light, the light enters the light-adjustable light-emitting plate from the edge provided with the strip-shaped light source and is transmitted in a total reflection way, and when meeting the lattice point of the light-adjustable microstructure, the light is scattered out, so that the door frame or the window embedded in the light-adjustable light-emitting plate emits luminous flux matched with the lattice point density, and the light is uniformly emitted to realize illumination; when the luminous flux of the light source is regulated, the luminous intensity of the adjustable light-emitting plate is changed, so that the indoor illumination intensity is regulated;
the illuminance distribution characteristics of the light emitting surface of the adjustable light emitting plate are determined according to the following method:
for the single-side light incidence condition, a reference plane rectangular coordinate system is established by using the light-emitting surface of the light-transmitting plate, and any point on the light-emitting surface has a definite coordinate (x 0 ，y 0 ) Wherein (x) 0 ，y 0 ) The definition domain of the transparent plate is limited in the range of the transparent plate; (x) 1 ，y 1 ) The method comprises the steps of solving the illuminance of a point light source on the light-emitting surface of a light-transmitting plate by utilizing the lambert cosine law and the illuminance inverse square law, and then accumulating or integrating and summing the illuminance of each point light source on the point to obtain the illuminance of any point on the light-emitting surface of the light-transmitting plate;
for the polygonal light incidence condition, calibrating each strip-shaped light source as I i I is light source serial numbers 1,2 and 3 …, the illumination of a certain point on the light-emitting surface of the light-transmitting plate is obtained by respectively carrying out the processing analysis on the strip light sources on each side, and then the illumination of a certain point on the light-emitting surface of the light-transmitting plate is accumulated to obtain the total illumination of the point on the light-emitting surface, so that the bottom illumination distribution of the polygonal light-entering condition is obtained;
the method for obtaining the illumination of the light-emitting surface of the light-adjustable luminous plate specifically comprises the following steps:
s1: a plane rectangular coordinate system is established for the light-emitting surface of the light-transmitting plate, and the coordinate of a point light source on the strip light source is calibrated as (x) 1 ，y 1 ) The coordinates of any point on the light-emitting surface of the light-transmitting plate are marked as (x) 0 ，y 0 )，Defining it as a target point; for building doors and windows with different shapes, the light-emitting surface (x 0 ，y 0 ) Such that (x) 0 ，y 0 ) Each point represented is within the range of the light-transmitting sheet material;
s2: the strip-shaped light source is regarded as a plurality of point light sources to be connected, and the linear distance l between the target point and the point light source is calculated according to the coordinates of the target point on the light-emitting surface of the glass plate and the coordinates of any point light source 1 And the included angle theta between the direction of the straight line distance of the two and the normal line of the emergent light of the point light source 1 ；
S3: measuring the luminous intensity I of the point light source on the emergent light normal 1 Calculating the included angle theta between the light source and the normal line of the emergent light respectively by using the lambert cosine law 1 Light intensity I in the direction of (2) 1 (θ 1 )，I 1 (θ 1 ) The method meets the following conditions:
I 1 (θ 1 )＝I 1 ·cosθ 1
s4: the point source is obtained by using the inverse square law of illuminance 0 ，y 0 ) Illuminance E at 1 ，E 1 The method meets the following conditions:
s5: let the number of point light sources of the strip light source be n, and calibrate the coordinates of each point light source as (x) i ，y i ) Wherein i is the light source number 1,2,3 …, n, repeating S1 to S4, and finding the point (x 0 ，y 0 ) Illuminance E at i Finally, the point (x 0 ，y 0 ) Sum of illuminance on:
obtaining the illuminance of any point on the light-emitting surface of the light-transmitting plate with single-side light incidence;
when the strip light source is a continuous light source, n is absentPoor, integrate and sum are adopted; for a length W, the light intensity in the normal direction of the emergent light is I 0 Taking differential dw for the length of the continuous light source, and the light intensity of each differential point light source in the normal direction of the emergent light is as follows:
processing each differential point light source dw according to steps S1-S4 to obtain differential illuminance dE of the differential point light source at a certain point on the light-emitting surface of the light-transmitting plate, and integrating the differential illuminance at the point:
E(x 0 ，y 0 )＝∫dE
the illuminance at any point of the light-emitting surface of the light-transmitting plate with single-side light entering can be obtained when the light source is a continuous light source;
s6: for the polygonal light-in model, the illuminance of each strip-shaped light source at one point on the light-emitting surface of the light-transmitting plate is marked as E j J is the number 1,2,3, n, processing each strip light source according to steps S1-S5 to obtain E j And then accumulating:
the illuminance at any point of the light-emitting surface of the light-transmitting plate with polygonal light entering can be obtained;
straight line distance l between one dot of the light modulation microstructure dots and one point light source on the strip-shaped light source 2 And the unit vector of the normal line of the point light source and the direction of the linear distance between the twoIncluded angle theta between 2 Are functions of coordinates (x, y); wherein l 2 The method meets the following conditions:
θ 2 the method meets the following conditions:
2. a dimmable light emitting board for use in building doors and windows with edges according to claim 1, wherein said dimmable light emitting board is made of an organic material or an inorganic material, said organic material comprising: one or more of polyethylene, polypropylene, polyethylene naphthalate, polycarbonate, polymethyl acrylate, polymethyl methacrylate, cellulose acetate butyrate, siloxane, polyvinyl chloride, polyvinyl alcohol, polyethylene terephthalate, modified polyethylene terephthalate, polydimethylsiloxane and cycloolefin copolymer; the inorganic material includes: one or more of glass, quartz and transmissive ceramic materials; the refractive index of the adjustable light-emitting plate is larger than that of air, and the transmittance of the adjustable light-emitting plate in a visible light wave band is higher than 90%.
3. The adjustable light-emitting panel suitable for the doors and windows of the building with arc edges according to claim 1, wherein the light-adjusting microstructure lattice points are distributed in a sparse and dense manner along the distance away from the strip-shaped light source by destroying the total reflection propagation of light rays in the adjustable light-emitting panel, and are distributed more sparsely when the distance is close to the strip-shaped light source, and are distributed more densely when the distance is close to the strip-shaped light source, so that the illuminance distribution on the light-emitting surface of the adjustable light-emitting panel is controllably changed, and the uniformity of the illuminance distribution on the light-emitting surface is controlled; the manufacturing method of the dimming microstructure lattice point comprises the following steps: screen printing, ink jet printing, laser direct writing or lithography; the material of the light modulation micro-structure lattice point comprises: one or more of scattering particles, dispersing agents, printing ink, UV glue and photoresist are mixed; the diameter of the mesh point of the light-adjusting microstructure is smaller than 100 mu m; the light-adjusting microstructure lattice points are paved on the whole surface of the light-adjusting luminous plate, so that the light-adjusting luminous plate uniformly emits light when the light source is started.
4. The dimmable light emitting board for building doors and windows with arc edges according to claim 1, wherein the strip light source and the dimmable light emitting board are as follows in size: the thickness of the light-transmitting plate and the luminous size of the light source in the thickness direction of the plate are smaller than the maximum value of the side length of the light-transmitting plate, so that the propagation distance of light in the thickness direction can be ignored; the central wavelength of the strip-shaped light source belongs to a visible light wave band, and the wavelength range is 380nm to 780 nm; the strip-shaped light source is attached to the side edge of the light-transmitting plate, and the distance between the strip-shaped light source and the side edge of the light-transmitting plate is not more than 0.5mm.
5. The dimmable light-emitting board suitable for doors and windows of buildings with arc edges according to claim 1, wherein the light-emitting intensity of the single point light source on the strip-shaped light source satisfies the lambert radiator characteristic, and the light intensity distribution satisfies the cosine law formula:
I θ ＝I 0 ·cosθ
wherein I is 0 Is the light intensity of the light source in the normal direction of the emergent light, I θ Is the light intensity of the light source in the direction with an included angle theta with the normal direction of the emergent light; the light source of the non-lambertian radiator is adopted, and the calculation result is substituted into the formula for definition by corresponding coefficients.
6. The dimmable light emitting board for door and window of building with arc edge according to claim 1, wherein the inverse square law of illuminance satisfies the formula:
wherein E (l) is the illuminance at a distance l from the point light source, and I (θ) is the light intensity of the point light source in a direction of an angle θ with the normal direction of the outgoing light.
7. A dimmable light-emitting board suitable for doors and windows with arc edges according to claim 3, wherein the method for determining the distribution of the light-dimming microstructure dots on the dimmable light-emitting board is as follows: calculating the illuminance of any point on the bottom surface of the light-transmitting plate, measuring the lowest illuminance on the light-emitting surface of the light-transmitting plate, and setting the density distribution of the light-adjusting microstructure lattice points on the light-transmitting plate by referring to the difference between the illuminance of any point and the lowest illuminance, wherein the light-adjusting microstructure lattice point density distribution is specifically as follows:
defining the dot density beta as the ratio of the projected area of the dots in a unit area on the light-emitting surface of the light-transmitting plate to the unit area, wherein beta takes a value between 0 and 1, and the dot density is the maximum value beta 0 ＝1；
Calculating to obtain the illuminance E (x) of any point on the light emergent surface of the light-transmitting plate 0 ，y 0 ) And measuring the minimum illuminance value E on the light emitting surface of the light-transmitting plate min ；
Defining a proportionality coefficient R with a value between 0 and 1 to ensure that the dot density of any point on the light-emitting surface of the light-transmitting plate is beta (x) 0 ，y 0 ) The method meets the following conditions:
β(x 0 ，y 0 )＝R·β 0
wherein R satisfies:
therefore, based on illumination analysis on the light-emitting surface of the light-transmitting plate, the design of the dot density on the light-emitting surface of the light-transmitting plate is finely quantized, so that uniform light-emitting under a door and window light-emitting mode is realized.
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