A design method for ultra-high brightness LED lighting equipment

Abstract

The present invention discloses a design method of ultra-high brightness LED lighting fixtures, including: determining the arrangement of lamps according to the application scenario of the lamps, selecting lamps according to the arrangement, and obtaining the selected lamps; determining the basic parameters of the lamps by selecting the lamps, and calculating the initial luminous flux of the lamps according to the basic parameters of the lamps; determining the rated power of the lamps according to the power density index of the national standard; calculating the effective luminous flux of the lamps according to the initial luminous flux of the lamps; obtaining the chip efficiency through the maximum luminous efficiency value calculation formula of the LED chip based on the effective luminous flux of the lamps; selecting the material, category, structure and heat dissipation structure of the lamps according to the basic parameters of the lamps, the rated power of the lamps and the chip efficiency, and obtaining the ultra-high brightness LED lighting fixtures. The present invention can design lamps with high energy saving, high light efficiency, high performance and long life by calculating the luminous flux and the light efficiency value.

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting equipment, and in particular relates to a design method for an ultra-high brightness LED lighting fixture. Background Art

[0002] At present, LED lighting products have been widely used in our daily life, especially in urban road lighting, rural town lighting, urban gardens, parks, square lighting, factory lighting, stadium lighting, etc. LED has the advantages of low power, high luminous efficiency, designable lighting, multiple color temperatures, high CRI, programmable control, etc., which are unmatched by traditional lighting products.

[0003] However, with the promotion and application of LED lighting products, especially outdoor lighting, lighting design engineers and lighting product development engineers have insufficient understanding of LED design and some design misunderstandings. The existing technical information, relevant national standards, and lighting design manuals are slightly broad and have large errors with actual application scenarios. There is a certain gap between the design and the actual expected goals. There are problems such as high power density, high power consumption, light pollution, and insufficient light, which are mainly reflected in the following aspects:

[0004] The impact of environmental pollution on lighting design is not considered;

[0005] Different regions have different economic development levels, different scales, different owners’ personnel, technology, equipment, management levels, owners’ application scenarios, and different lighting product maintenance levels. The influence of various factors should be considered in lighting design;

[0006] When lighting product development engineers develop and design a lighting product, the existing technology is just a simple addition of the number of chips. The improvement of the luminous flux and luminous efficiency of lamps is heavily dependent on the improvement of upstream product technologies such as chips and power supplies. As for the application level, there is a lack of independent theoretical basis and innovation basis. Summary of the invention

[0007] In order to solve the above technical problems, the present invention proposes a design method for an ultra-high brightness LED lighting fixture to solve the above problems in the prior art.

[0008] To achieve the above object, the present invention provides a design method for an ultra-high brightness LED lighting fixture, comprising the following steps:

[0009] Determine the arrangement of lamps according to the application scenarios of lamps, select lamps according to the arrangement, and obtain the selected lamps;

[0010] Determining basic parameters of the lamp through the selected lamp, and calculating the initial luminous flux of the lamp according to the basic parameters of the lamp;

[0011] Determine the rated power of the lamp according to the national standard power density index;

[0012] Calculating the effective luminous flux of the lamp according to the initial luminous flux of the lamp, the parameters for calculating the effective luminous flux of the lamp include: a lamp maintenance factor, an environmental pollution correction factor and a lamp light decay correction factor;

[0013] Based on the effective luminous flux of the lamp, the chip efficiency is obtained by using the maximum luminous efficacy value calculation formula of the LED chip;

[0014] The material, type, structure and heat dissipation structure of the lamp are selected according to the basic parameters of the lamp, the rated power of the lamp and the chip efficiency to obtain an ultra-high brightness LED lighting fixture.

[0015] Preferably, the expression for calculating the initial luminous flux of the lamp is:

[0016] Φe = Pe

[0017] Wherein, Φe represents the initial luminous flux of the lamp, Pe represents the rated power of the lamp, η1 represents the efficiency of the driving power supply, η2 represents the efficiency of the optical lens, η3 represents the efficiency of the reflector, η4 represents the efficiency of the chip, η5 represents the efficiency of the light-transmitting cover, and K1 represents the temperature coefficient.

[0018] Preferably, the driving power supply efficiency is obtained based on the rated voltage of the LED light source, the circuit structure of the LED light source, the output current of the driving power supply and the circuit structure of the driving power supply.

[0019] Preferably, the method for calculating the initial luminous flux of the lamp includes:

[0020] When the lamp structure only includes an optical lens, the reflector efficiency and the light-transmitting cover efficiency in the expression for calculating the initial luminous flux of the lamp are taken as 1;

[0021] When no optical lens is included, the reflector efficiency and light-transmitting cover efficiency in the expression for calculating the initial luminous flux of the lamp are taken from actual test data, and the optical lens efficiency is taken as 1.

[0022] Preferably, the expression for calculating the effective luminous flux of the lamp is:

[0023] Φ=ΦeUK1K2K3;

[0024] In the formula, Φ represents the effective luminous flux of the lamp, U represents the lamp utilization coefficient, K1 represents the lamp maintenance coefficient, K2 represents the environmental pollution correction coefficient, and K3 represents the lamp light decay correction coefficient.

[0025] Preferably, the method for obtaining the environmental pollution correction coefficient includes: operating the new lamp on the work surface and in a laboratory under the same conditions as the work surface to obtain the average illumination, and the ratio of the average illumination generated by the new lamp on the work surface to the average illumination generated when operating in the laboratory is the environmental pollution correction coefficient.

[0026] Preferably, the method for obtaining the lamp light decay correction coefficient includes: conducting experiments on different sample lamps in different standard working environment laboratories, regularly powering on, simulating working conditions, and regularly measuring the average illuminance generated on the working surface; during the product life cycle, measuring the ratio of the average illuminance generated on the working surface to the average illuminance generated when the lamp is newly installed under the same conditions, which is the lamp light decay correction coefficient.

[0027] Preferably, when designing a lamp, factors affecting the lamp light decay correction coefficient include: ambient temperature, chip light decay, aging of the lamp lens material, aging of the light-transmitting cover material, scratches and wear caused by maintenance of the lampshade or lens surface, and functional decay of the driving power supply device.

[0028] Preferably, the maximum light efficiency value calculation formula of the LED chip is:

[0029] η max =dΦ / di;

[0030] Where η max It represents the maximum value of the luminous flux per watt emitted by the LED chip under the operating current, operating voltage and standard environment. i represents the operating current when the LED chip emits different luminous fluxes under standard environment.

[0031] Compared with the prior art, the present invention has the following advantages and technical effects:

[0032] The present invention provides a parameter model with practical significance for lighting product development engineers, and the model includes the core photometric parameters of the lamp - the initial luminous flux of the lamp, the efficiency of the driving power supply, the rated power of the lamp, the temperature influence coefficient, the efficiency of the optical lens, the efficiency of the reflector, the efficiency of the chip, and the efficiency of the light-transmitting cover, and comprehensively considers various influencing factors that affect the luminous flux of the LED lighting product, and standardizes the deficiencies in the existing design. According to this mathematical model formula, the lighting product development engineer can fully consider various influencing factors, and through structural design, material selection, parameter adjustment, process control, optical path design, reasonable circuit design, temperature control, and heat dissipation design, thereby achieving a comprehensive improvement in the photometric parameters, electrical parameters, service life, and performance stability of the lighting product, and achieving the comprehensive requirements of high energy saving, high light efficiency, high performance, and long life, and providing a theoretical basis for the development of products that is operable, can be fully controlled in advance, during, and after the event, and can be tested and detected.

[0033] The present invention provides a photometric parameter model with practical significance for lighting design engineers. The model includes the initial luminous flux of the lamp, the lamp utilization coefficient, the lamp rated power, the lamp maintenance coefficient, the optical lens efficiency, the environmental pollution correction coefficient, the chip efficiency, and the lamp light decay correction coefficient. It comprehensively considers the photometric performance parameter requirements of the product for the intended design application scenario. It solves the problems that are lacking and insufficient in domestic and foreign design manuals, national standards, and industry-related standards in the actual use environment, and provides a theoretical basis for product development that is operational, can be fully controlled before, during, and after the event, and can be tested and detected.

[0034] Through feasible experiments, the behavior of designers is more effectively regulated, the design is closer to the actual values, better meets user requirements and usage requirements, makes up for the deficiencies of relevant specifications, and provides an effective solution to different application scenarios and differentiated user needs.

[0035] The present invention solves the problem of determining the maximum luminous efficiency value of LEDs. By analyzing the function curve of the output luminous flux and input current of the LED chip, the maximum luminous efficiency point can be determined by this method, and the voltage and current of the chip at the maximum luminous efficiency point can be determined, so that lighting fixture development engineers can select appropriate luminous intensity and electrical parameters, thereby providing mathematical tools for developing ultra-high luminous efficiency energy-saving lighting products. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1 The figure is a flow chart of a design method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0040] Embodiment 1

[0041] like Figure 1 As shown, this embodiment provides a design method for an ultra-high brightness LED lighting fixture device, comprising the following steps:

[0042] Determine the layout of lamps according to the application scenarios of lamps, select lamps according to the application scenarios and layout methods, and obtain the selected lamps;

[0043] Determining basic parameters of the lamp through the selected lamp, and calculating the initial luminous flux of the lamp according to the basic parameters of the lamp;

[0044] Determine the rated power of the lamp according to the national standard power density index;

[0045] Calculating the effective luminous flux of the lamp according to the lamp application scenario and the initial luminous flux of the lamp, and performing luminous flux correction by using the lamp maintenance factor, the environmental pollution correction factor and the lamp light decay correction factor when calculating the effective luminous flux of the lamp;

[0046] Based on the effective luminous flux of the lamp, the chip efficiency is obtained by using the maximum luminous efficacy value calculation formula of the LED chip;

[0047] The material, type, structure and heat dissipation structure of the lamp are selected according to the basic parameters of the lamp, the rated power of the lamp and the chip efficiency to obtain an ultra-high brightness LED lighting fixture.

[0048] Furthermore, the lighting equipment layout is determined based on the on-site equipment usage scenario, lamp installation height, and power density.

[0049] Furthermore, the selection of lighting equipment is determined based on the effective luminous flux of the lamp, the lighting distribution method of the lamp (light output angle), the uniformity of illumination, the color temperature of the lamp, the color rendering index, and the power of the lamp.

[0050] Furthermore, the expression for calculating the initial luminous flux of the lamp is:

[0051] Φe = Pe

[0052] Among them: Φe: initial luminous flux of the lamp, which is the ability of the lamp to provide luminous flux when it leaves the factory;

[0053] Pe: rated power of lamp;

[0054] η1: Driving power efficiency, which characterizes the ability of the lamp to convert the input power into the electrical power consumed by the light source through the driving power supply;

[0055] K1: Temperature coefficient, which refers to the luminous flux emitted by the lamp under different ambient temperatures and the standard environment (Ta = 25°C);

[0056] The ratio of the luminous flux emitted by the lamp represents the degree to which the lamp is affected by temperature and the heat dissipation performance of the lamp;

[0057] η2: Optical lens efficiency, which refers to the ability of the lamp to convert the luminous flux generated by itself into outgoing luminous flux through the optical lens;

[0058] η3: Reflector efficiency refers to the ability of the lamp to convert the luminous flux generated by itself into outgoing luminous flux through the lamp reflector;

[0059] η4: Chip efficiency refers to the luminous flux per watt emitted by the chip selected for the lamp under the working current and working voltage under standard conditions, in lm / W;

[0060] η5: Translucent cover efficiency refers to the ability of the initial luminous flux of the lamp to be converted into the initial luminous flux of the lamp when the luminous flux emitted by the lens or reflector passes through the external protective translucent cover;

[0061] Furthermore, the efficiency of the driving power supply at this time is determined by the rated voltage of the LED light source, the circuit structure of the LED light source, the output current of the driving power supply, and the circuit structure, and is one of the important factors determining the efficiency of the lamp;

[0062] Furthermore, different lamps adopt different structural designs and different optical designs. The values ​​of emitter efficiency and optical lens efficiency should be determined based on experimental data; their values ​​are determined by materials, structures, and processing technology;

[0063] Furthermore, when the lamp structure only includes an optical lens, the reflector efficiency and the light cover efficiency in the original formula are taken as 1; when the optical lens is not included, the reflector efficiency and the light cover efficiency in the original formula are taken according to actual test data, and the optical lens efficiency is taken as 1.

[0064] Furthermore, the expression for calculating the effective luminous flux of the lamp is:

[0065] Φ=ΦeUK1K2K3;

[0066] Among them: Φ: effective luminous flux of the lamp, which is the ability to characterize the luminous flux that the lamp can provide under working conditions, and is the parameter value of the luminous flux calculated when the design unit selects the lamp;

[0067] Φe: initial luminous flux of the lamp, which characterizes the luminous flux that the lamp can provide when it leaves the factory;

[0068] U: lamp utilization coefficient, which is the ratio of the luminous flux of the lamp that is effectively distributed in the design space to the luminous flux of the lamp;

[0069] K1: lamp maintenance factor, which is the ratio of the average illuminance (or luminous flux) produced on the working surface after a certain period of use of the lighting equipment (optical lens or light shield is cleaned) to the average illuminance (or initial luminous flux) produced when the equipment is newly installed under the same conditions;

[0070] K2: Environmental pollution correction factor, which refers to the pollution correction factor of the on-site environment where the lighting equipment is installed. Different correction factors have different values ​​for different degrees of environmental pollution.

[0071] K3: Light decay correction factor of lamps, which is a coefficient that characterizes the stability of lamp performance, the quality of lamp lens (lampshade) materials, chip performance, and quality differences in design, manufacturing, and production processes. Different sample lamps are tested in different standard working environment laboratories, powered on at regular intervals to simulate working conditions, and the average illumination generated on the working surface is measured at regular intervals. During the product life cycle, the ratio of the average illumination generated on the working surface to the average illumination generated when the lamp is newly installed under the same conditions is measured;

[0072] Furthermore, the lamp utilization coefficient K1 is determined by looking up the table of relevant national specifications;

[0073] Method for determining the environmental pollution correction factor: select the on-site use environment of the lighting equipment installation site (usually select the season with the greatest pollution impact), the ratio of the average illuminance generated on the working surface by the newly installed lighting equipment (brand new and unused products) to the average illuminance generated by the equipment in the laboratory under the same conditions;

[0074] Method for determining the light decay correction factor of lamps: Experiment with different sample lamps in different standard working environment laboratories, power on them at regular intervals, simulate working conditions, and measure the average illumination generated on the working surface at regular intervals. During the life cycle of the product, measure the ratio of the average illumination generated on the working surface to the average illumination generated when the lamp is newly installed under the same conditions. Based on this value and comprehensive consideration of various factors such as technology, economy, and performance, determine the product life cycle and light decay correction factor of the lamp. The light decay correction factor of the lamp is affected by factors such as ambient temperature, chip light decay, aging of lamp lens materials, aging of light cover materials, scratches and wear caused by lampshade (lens) surface maintenance, and functional attenuation of driving power devices.

[0075] Furthermore, the maximum luminous efficacy value of the LED chip is calculated as follows:

[0076] η max =dΦ / di

[0077] Where: η max It refers to the maximum luminous flux per watt emitted by the LED chip under the working current and working voltage under standard environment. The unit is lm / W. It is the reference basis for lamp design units to select the working state of the chip when designing lamps.

[0078] Φ refers to the luminous flux emitted by the LED chip under different operating currents and operating voltages under standard conditions;

[0079] i refers to the operating current of the LED chip when it emits different luminous fluxes under standard conditions;

[0080] Furthermore, usually the luminous flux emitted by an LED chip is in a functional relationship with the current passing through the chip. When designing lamps, lamp design units select appropriate operating current and operating voltage and design appropriate circuit structures based on the relationship curve between the luminous flux emitted by an LED chip and the current passing through the chip provided by the LED chip manufacturer, thereby maximizing the performance of the lamp.

[0081] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A design method for ultra-high brightness LED lighting fixture, characterized in that: The following steps are involved: Determine the arrangement of lamps according to the application scenarios of lamps, select lamps according to the arrangement, and obtain the selected lamps; Determining basic parameters of the lamp through the selected lamp, and calculating the initial luminous flux of the lamp according to the basic parameters of the lamp; The expression for calculating the initial luminous flux of the lamp is: Φe = Pe In the formula, Φe represents the initial luminous flux of the lamp, Pe represents the rated power of the lamp, η1 represents the efficiency of the driving power supply, η2 represents the efficiency of the optical lens, η3 represents the efficiency of the reflector, η4 represents the efficiency of the chip, η5 represents the efficiency of the light-transmitting cover, and K1 represents the temperature coefficient; Determine the rated power of the lamp according to the national standard power density index; Calculate the effective luminous flux of the lamp according to the initial luminous flux of the lamp. The parameters for calculating the effective luminous flux of the lamp include: lamp maintenance factor, environmental pollution correction factor and lamp light decay correction factor; The expression for calculating the effective luminous flux of the lamp is: Φ=ΦeUK1K2K3; In the formula, Φ represents the effective luminous flux of the lamp, U represents the lamp utilization coefficient, K1 represents the lamp maintenance coefficient, K2 represents the environmental pollution correction coefficient, and K3 represents the lamp light decay correction coefficient; Adjusting chip efficiency based on the effective luminous flux of the lamp by using the maximum luminous efficacy value of the LED chip; The acquisition of the maximum light efficiency value of the LED chip includes: obtaining the maximum light efficiency value extreme point through the functional relationship between the light flux emitted by the LED chip and the current, and obtaining the maximum light efficiency value in combination with the current relationship curve; The material, type, structure and heat dissipation structure of the lamp are selected according to the basic parameters of the lamp, the rated power of the lamp and the adjusted chip efficiency. During the selection process, the expression of the initial luminous flux of the lamp and the expression of the effective luminous flux of the lamp are used as mathematical models to optimize and adjust the material, type, structure and heat dissipation structure of the lamp to obtain an ultra-high brightness LED lighting fixture.

2. The design method of ultra-high brightness LED lighting fixture according to claim 1, characterized in that: The driving power efficiency is obtained based on the rated voltage of the LED light source, the circuit structure of the LED light source, the output current of the driving power and the circuit structure of the driving power.

3. The design method of ultra-high brightness LED lighting fixture according to claim 1, characterized in that: Methods for calculating the initial luminous flux of a luminaire include: When the lamp structure only includes an optical lens, the reflector efficiency and the light-transmitting cover efficiency in the expression for calculating the initial luminous flux of the lamp are both taken as 1; When no optical lens is included, the reflector efficiency and light-transmitting cover efficiency in the expression for calculating the initial luminous flux of the lamp are taken from actual test data, and the optical lens efficiency is taken as 1.

4. The design method of ultra-high brightness LED lighting fixture according to claim 1, characterized in that: The method for obtaining the environmental pollution correction coefficient includes: operating the new lamp on the work surface and in a laboratory under the same conditions as the work surface to obtain the average illumination, and the ratio of the average illumination generated by the new lamp on the work surface to the average illumination generated when operating in the laboratory is the environmental pollution correction coefficient.

5. The design method of ultra-high brightness LED lighting fixture according to claim 1, characterized in that: The method for obtaining the light decay correction coefficient of the lamp includes: conducting experiments on different sample lamps in different standard working environment laboratories, regularly powering on, simulating working conditions, and regularly measuring the average illuminance generated on the working surface. During the product life cycle, the ratio of the average illuminance generated on the working surface to the average illuminance generated when the lamp is newly installed under the same conditions is the light decay correction coefficient of the lamp.

6. The design method of ultra-high brightness LED lighting fixture according to claim 1, characterized in that: When designing lamps, the factors that affect the light decay correction coefficient of lamps include: ambient temperature, chip light decay, aging of lamp lens materials, aging of light-transmitting cover materials, scratches and wear caused by maintenance of lampshade or lens surface, and functional attenuation of driving power devices.

Images