CN113587049A

CN113587049A - Device for preparing light source

Info

Publication number: CN113587049A
Application number: CN202110875081.XA
Authority: CN
Inventors: 李成宇; 韩松林; 王朝伟; 张洪杰
Original assignee: Zhongke Rare Earth Changchun Co ltd
Current assignee: Zhongke Rare Earth Changchun Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-11-02
Anticipated expiration: 2041-07-30
Also published as: CN113587049B

Abstract

The invention relates to a device for the production of a light source, comprising at least: the distribution module is used for distributing the fluorescent colloid to a first semiconductor chip with an emission peak wavelength of 360-490nm and/or a second semiconductor chip with an emission peak wavelength of 700-800nm, and/or acquiring the area and/or size of a corresponding colloid point distributed to the first semiconductor chip and/or the second semiconductor chip; the device comprises a detection module used for measuring the light-emitting characteristics of light emitted by a plurality of first semiconductor chips and/or second semiconductor chips distributed with fluorescent colloid, a control module used for calculating an indication value of the light-emitting characteristics of at least one first semiconductor chip and/or second semiconductor chip according to the light-emitting characteristics measured by the detection module, and adjusting the distribution amount of the distribution module to the fluorescent colloid based on the indication value, and/or adjusting the distribution amount of the distribution module to the fluorescent colloid based on the area and/or the size of the dispensing point obtained by the distribution module and controlling the movement of the distribution module so as to adjust the dispensing gap.

Description

Device for preparing light source

Technical Field

The invention relates to the technical field of optical biological effect, in particular to a device for preparing a light source and a lamp made of the light source.

Background

As a new light source, LEDs have been widely used in the field of lighting, but with the improvement of life quality of people, the LED light source is no longer simply required to have high luminous efficiency to meet basic lighting requirements, and more is required to have influences on human health, visual experience, work efficiency, and the like. Most of commercially available LED light sources have low color rendering indexes, the influence of the light sources on human health is not considered too much, particularly the influence of the light sources on the non-visual biological effect of people, and certain harm can be caused to the human health after the light sources are irradiated for a long time.

CN111140774A discloses a novel light source capable of inhibiting excessive increase of an eye axis, a simulation method thereof and a lamp, wherein the spectrum of the light source is a continuous spectrum of 360nm-800 nm. The light source simulation method adopts the LED chip 60 or the chip combination which can emit different wavelengths to excite the fluorescent powder to emit light, or adopts the LED chip 60 or the chip combination which can emit different wavelengths to emit light, so as to form the light source which can emit 360nm-800nm continuous spectrum. The specific artificial novel spectrum of the light source provided by the embodiment of the invention can effectively inhibit the excessive increase of the eye axis, thereby playing a role in preventing and reducing the incidence rate of myopia.

However, the above prior art does not provide a specific production method for the light source or the device thereof in any of the embodiments described in the above prior art, so that the mass production cannot be guided, and the light source provided by the prior art and having the whole wavelength range still has the technical problems of non-uniform light emitting color, weak light emitting intensity, and the like. In addition, the production process is relatively complex, and the design and production cost is high. Secondly, when packaging semiconductor chips, the dispensing pitch is often fixed, so that the dispensing flexibility is poor, and the semiconductor chips are not uniformly distributed with glue or the structure after dispensing is greatly different. Thus, there remains a need in the art for at least one or several aspects of improvement.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention provides a device for light source preparation, which is intended to solve at least one or more technical problems in the prior art.

It should be understood that, in any spectral interval, the first interval is an interval formed by two endpoint values of a single-cycle interval or a single-change at least in part of the spectral interval, for example, a single change means that the corresponding spectral energy in the spectral interval has a tendency of monotone rising or monotone falling; the single cycle means that the corresponding spectral energy in the spectral interval has only a single trend of rising first and then falling and/or falling first and then rising, and there is no trend of change such as rising first and then falling and then rising again.

To achieve the above object, the present invention provides an apparatus for light source preparation, comprising at least: the distribution module is used for distributing the fluorescent colloid to a first semiconductor chip with an emission peak wavelength of 360-490nm and/or a second semiconductor chip with an emission peak wavelength of 700-800nm, and/or acquiring the area and/or size of a corresponding colloid point distributed to the first semiconductor chip and/or the second semiconductor chip; a detection module for measuring a light emission characteristic of light emitted by the plurality of first semiconductor chips and/or the plurality of second semiconductor chips to which the fluorescent colloids are assigned; a control module configured to calculate an indication value regarding the light emitting characteristic of the at least one first semiconductor chip and/or the second semiconductor chip according to the light emitting characteristic measured by the detection module, and adjust the dispensing amount of the dispensing module to the fluorescent colloid based on the indication value, and/or adjust the dispensing amount of the dispensing module to the fluorescent colloid based on the area and/or size of the dispensing point acquired by the dispensing module and control the movement of the dispensing module so as to adjust the dispensing gap. The gap between the fluorescent glue dots distributed on each semiconductor chip is adjusted by controlling the movement of the distribution module, so that the area of the fluorescent glue covered on each semiconductor chip is uniform, the thickness of the fluorescent glue is proper, and the emitted light formed by exciting the fluorescent glue by the semiconductor chip has the light-emitting characteristic of proper intensity and uniform emission.

Preferably, the first semiconductor chip is configured to form the first light emitting unit having a color temperature range of white light by exciting a phosphor having an emission peak wavelength in a range of 410 to 900 nm. Aiming at the problem of uneven light emission of the existing light source, a 360-490nm semiconductor chip capable of emitting blue-violet light is utilized to excite a fluorescent light source in a 410-900nm visible light range to compound a white light emitting unit, light intensity ratios corresponding to different wave bands of the white light emitting unit are different, the light emitting unit with white color temperature is compounded through light rays with different ratios or intensities, and the light source prepared by the light emitting unit can emit uniform and stable light rays and has proper light emitting intensity. Particularly, when the light source of the invention is applied to daily illumination of people or growth illumination of plants, the light source has good illumination effect. For example, when the table lamp is used for assisting human life and work, the ratio of the intensity of blue-violet light contained in the table lamp is relatively low, so that the damage of corresponding light to human eyes can be reduced, because of the light radiation effect of blue light, because blue light pigment is different from other types of pigment, photoreceptor cells which receive the blue light pigment in a human body cannot reject to receive new blue photons because human eyes do not recover visual cycle, and conversely, the photoreceptor cells can continuously receive the blue light photons, so that human retina tissues such as lipofuscin are increased, oxygen free radicals are generated, lysosomes with the functions of cell digestion, autophagy and digestion in the human body are inactivated, the number of dead photoreceptor cells is increased, and the vision of the human is seriously influenced and even blindness is caused; secondly, the non-visual effect of the blue light has certain influence on the daily work and life of people, such as physiological indexes of sleep, heart rate and the like of people, and even the cognition or learning ability of people during work, and the blue-violet light accounts for the total light intensity ratio of the light source, so that the emotion of people can be improved on the basis of ensuring effective illumination, the fatigue of human eyes can be relieved, the great change of the blood pressure, the heart rate or the pulse of the human body caused by the over stimulation of the blue light can be avoided, and the concentration of people can be effectively helped; in addition, when a certain light intensity is continuously irradiated to the eye, a thermal radiation effect is generated, which also causes potential unpredictable damage to the eye. On the other hand, when the red light and the blue light are used for illuminating the growth of plants, the wavelength range corresponding to the red light and the blue light is the optimal interval suitable for the photosynthesis of the plants, wherein, blue light is mainly used for promoting the growth of plant leaves and stems, red light is used for promoting the flowering and fruiting of plants, the light-emitting unit in the invention, the spectral energy corresponding to the red light area and the blue-violet light area are different from each other, the higher proportion of the red light can effectively promote the generation of chlorophyll of the plants and secrete hormone for inhibiting the decomposition of chlorophyll, thereby improving the photosynthesis, helping the plants to accumulate carbohydrate, promoting the absorption and the metabolism of the carbohydrate, meanwhile, the luminescence spectrum corresponding to each wave band of the invention has continuity, can meet the requirements of the plant growth for light rays with different wavelengths and luminescence colors in the whole period, for example, a suitable green light can retard leaf senescence and a suitable violet light can favor the accumulation of hormones such as anthocyanin in certain plants.

Preferably, the spectral radiance of the first light-emitting unit in the wavelength range of 360-800 nm is changed in a mode of gradually increasing to the middle part of the waveband and then decreasing. The spectral energy value corresponding to the blue-violet light in the light source is the lowest, the spectral energy is increased along with the change of the emission wavelength until the corresponding energy peak value is reached in the wavelength range corresponding to the red light, the light rays with different light-emitting wavelengths in different proportions are compounded to form a light-emitting unit which can emit uniform and stable light and has continuous light-emitting characteristics, and the description of the influence of the blue-violet light and the red light on the growth of human bodies and/or plants shows that the ratio of the blue light in the lighting source is lower under most conditions, and the excessive blue light can delay or inhibit the growth of the plants, inhibit the synthesis of carbohydrates and the like; for human body, the basic lighting requirements of daily work, life and study of people are met, and meanwhile, the harm of blue-violet light to human eyes and human body is reduced.

Preferably, the spectrum of the first light-emitting unit comprises at least two division points for distinguishing the degree of energy fluctuation and/or the distribution capability, wherein the shape of the spectrum on both sides of the division points is at least: in the first interval on two sides of the division point, the ray which is parallel to the wave band axis and is emitted from any point on the energy spectral line can form a closed area together with the energy spectral line and the ray which passes through the division point and is perpendicular to the wave band axis. The areas of the closed areas adjacent to each other are different, namely the corresponding spectral energies in the adjacent first intervals are different, the light with different luminous colors is compounded by the energy occupation ratios to form a luminous unit with white color temperature, meanwhile, the peak emission wavelength of the light with specific excitation wavelength is not changed along with the increase of the material concentration, and the luminous intensity is increased along with the change of the material concentration, so that the color temperature or the brightness and the like of the light source can be changed by changing the proportion of a semiconductor chip or a fluorescent light source in the luminous unit, and the color rendering index can be changed at the same time; in particular, the light source formed by the light emitting unit has at least continuous and uniform light emitting characteristics and appropriate light emitting intensity based on the closed regions different from each other.

Preferably, the first semiconductor chip and/or the second semiconductor chip are/is configured to excite the fluorescent powder with the emission peak wavelength within the range of 410-900nm after being connected in parallel or in series to form the second light-emitting unit with the white light color temperature range.

Preferably, the spectral radiance of the second light-emitting unit in the wavelength range of 360-800 nm is changed in a mode of gradually increasing to the middle part of the waveband and then decreasing. The spectral energy value corresponding to the blue-violet light in the light source is the lowest, the spectral energy is increased along with the change of the emission wavelength until the corresponding energy peak value is reached in the wavelength range corresponding to the red light, the light rays with different light-emitting wavelengths in different proportions are compounded to form a light-emitting unit which can emit uniform and stable light and has continuous light-emitting characteristics, and the description of the influence of the blue-violet light and the red light on the growth of human bodies and/or plants shows that the ratio of the blue light in the lighting source is lower under most conditions, and the excessive blue light can delay or inhibit the growth of the plants, inhibit the synthesis of carbohydrates and the like; for human body, the basic lighting requirements of daily work, life and study of people are met, and meanwhile, the harm of blue-violet light to human eyes and human body is reduced.

Preferably, the spectrum of the second light-emitting unit comprises at least two division points for distinguishing the degree of energy fluctuation and/or the distribution capability, wherein the shape of the spectrum on both sides of the division points is at least: at least two closed areas with different areas or shapes can be formed in a spectral interval formed by the axis of any dividing point except the boundary end point of the energy spectral line and the dividing points on the two adjacent sides of the dividing point and the energy spectral line.

Preferably, the device for light source preparation further comprises at least: the device comprises a transmission module and a control module, wherein the transmission module is used for controlling the transmission of the first semiconductor chip and/or the second semiconductor chip between the distribution module and the detection module; the control module is configured to calculate an indication value of the light emitting characteristic of the at least one first semiconductor chip and/or the second semiconductor chip according to the light emitting characteristic measured by the detection module, and is capable of adjusting the dispensing amount of the fluorescent colloid by the dispensing module at least based on the indication value.

Preferably, a heating unit for heating the fluorescent colloid is arranged on the distribution module, and the heating unit is controlled or driven by the control module, wherein the control or driving is completed based on a real-time fluorescent colloid temperature detection value.

Preferably, the maximum peak point of the spectral energy of the first light-emitting unit and the second light-emitting unit in the wavelength range of 400-480nm is less than or equal to the minimum peak point of the spectral energy in the wavelength range of 640-780 nm.

Preferably, the spectral radiance of the first light-emitting unit and the spectral radiance of the second light-emitting unit in the wavelength range of 400-480nm account for 2% -30% of the whole spectral radiance, and the spectral radiance of the first light-emitting unit and the spectral radiance of the second light-emitting unit in the wavelength range of 640-780nm account for 30% -90% of the whole spectral radiance.

Preferably, the spectrum comprises at least six emission peaks in the wavelength range of 360nm to 800nm, wherein the peak intensity of the emission peak in the wavelength range of 640nm to 755nm is the largest, the peak intensity of the emission peak in the wavelength range of 360nm to 480nm is the smallest, and the ratio of the peak intensities of the emission peaks is 1% to 50%.

Preferably, the spectrum comprises at least two emission peaks in the wavelength range of 640nm to 780nm, wherein the emission peak in the wavelength range of 640nm to 755nm is the same as the maximum peak value of the spectral radiance corresponding to each emission peak in the wavelength range of 720nm to 780 nm; the minimum peak value of the spectral radiance of the emission peak positioned in the wavelength range of 640nm to 755nm is smaller than the minimum peak value of the spectral radiance of the emission peak positioned in the wavelength range of 720nm to 780 nm.

Preferably, the emission peak wavelength of the phosphor is 500-600nm, 600-700nm and/or 700-800 nm.

Preferably, the first semiconductor chip preferably has an emission peak wavelength of 380-.

Drawings

FIG. 1 is a schematic diagram of a preferred structure of a light source according to an embodiment of the invention;

FIG. 2 is a schematic view of a preferred structure of the apparatus for manufacturing a light source according to the present invention;

FIG. 3 is a preferred partial perspective view of the device of the present invention;

FIG. 4 is a schematic diagram of a preferred simulation method of the light source of the present invention;

FIG. 5 is a schematic diagram of a preferred simulation method of the light source of the present invention;

FIG. 6 is a schematic diagram of a preferred simulation method of the light source of the present invention;

FIG. 7 is a schematic diagram of a preferred simulation method of the light source of the present invention;

FIG. 8 is a schematic diagram of a preferred simulation method of the light source of the present invention;

fig. 9 is a schematic diagram of a preferred spectral power distribution of a light source according to the present invention.

List of reference numerals

1: plate body 2: first semiconductor chip 3: second semiconductor chip

4: and 5, fluorescent powder: a light uniformizing layer X: continuous spectrum light

10: the transfer module 20: the control module 30: dispensing module

40: the detection module 50: wire frame 51: a first electrode

52: second electrode 60: the LED chip 70: package member

71: first lead 72: second lead 100: LED light source

301: heating unit a: division point R1: 0.2

R2：0.4 R3：0.6 R4：0.8

R5：1.0 W1：360nm W2：400nm

W3：480nm W4：640nm W5：720nm

W6：755nm W7：780nm W8：800nm

Detailed Description

This is described in detail below with reference to fig. 1-9.

The invention provides a device for preparing a light source, in particular, a schematic diagram of a simulation method of a preferred embodiment of the light source of the invention as shown in fig. 1, the light source can comprise one of the following components: the light-emitting device comprises a plate body 1, a first semiconductor chip 2, a second semiconductor chip 3, fluorescent powder 4 and a light-homogenizing device 5. The light source formed by the above components can realize full spectrum emission.

According to a preferred embodiment, the types of plate body 1 include, but are not limited to, ceramic substrates, metal substrates, and ceramic-metal composite substrates. Further, the metal substrate includes, but is not limited to, a copper substrate, an aluminum substrate, a tungsten-copper alloy substrate, a tungsten-aluminum alloy substrate, a copper-silver alloy substrate, and the like. Ceramic substrates include, but are not limited to, aluminum oxide substrates, beryllium oxide substrates, aluminum nitride substrates, silicon nitride substrates, AlN/SiC composite substratesAlN/BeO composite substrate, Al₂O₃an/AlN composite substrate, etc.

According to a preferred embodiment, the emission wavelength of the first semiconductor chip 2 is about 360-490 nm. Preferably, the light emission wavelength of the first semiconductor chip 2 is about 380-470 nm. The emission wavelength of the second semiconductor chip 3 is about 700 and 800 nm.

According to a preferred embodiment, the emission wavelength of the phosphor 4 is approximately 419-900 nm. Further, the phosphor 4 includes, but is not limited to, a blue phosphor, a green phosphor, a red phosphor, or a combination thereof. Preferred emission wavelengths for phosphor 4 include, but are not limited to, 500-570nm, 600-700nm, and 700-800 nm.

According to a preferred embodiment shown in FIGS. 1 and 4, the first semiconductor chip 2 with an emission peak wavelength of 360-490nm is used to excite the phosphor 4 with a peak wavelength of 410-900nm to form a first light-emitting unit with a color temperature of 2700K + -300K. Further, the light emitting unit and the second semiconductor chip 3 with the emission peak wavelength of 700-800nm are combined to emit light, that is, the first light emitting unit and the second semiconductor chip 3 are combined with each other and mounted on the plate body 1, and then the light homogenizing device 5 capable of transmitting light rays with the wavelength of more than 360nm is adopted as a lampshade to realize the emission of light rays which accord with continuous spectrum and radiance, so that the light source is formed.

According to a preferred embodiment shown in fig. 1 and 5, the first semiconductor chip 2 with the emission peak wavelength of 360-. Further, the second light emitting unit and the second semiconductor chip 3 with the emission peak wavelength of 700-800nm are combined to emit light, that is, the second light emitting unit and the second semiconductor chip 3 are combined and installed on the plate body 1, and then the light homogenizing device 5 capable of transmitting light rays with the wavelength of more than 360nm is adopted as a lampshade to realize the emission of light rays conforming to the continuous spectrum and the radiance, so that the light source is formed.

According to a preferred embodiment shown in fig. 1 and fig. 6, the first semiconductor chip 2 with the emission peak wavelength of 360-. Further, the second light emitting units are combined with each other and mounted on the plate body 1, and then the light equalizing device 5 capable of transmitting light rays of more than 360nm is used as a lampshade to realize the emission of light rays according with continuous spectrum and radiance, so that the light source is formed.

According to a preferred embodiment shown in FIG. 1 and FIG. 7, the first semiconductor chip 2 with an emission peak wavelength of 360-. Further, the first light emitting unit and the second light emitting unit are combined with each other and mounted on the plate body 1, and then the light equalizing device 5 which can transmit light rays of more than 360nm is adopted as a lampshade to realize the emission of light rays according with continuous spectrum and radiance, so that the light source is formed.

According to a preferred embodiment shown in FIGS. 1 and 8, the first semiconductor chip 2 with an emission peak wavelength of 360-490nm is used to excite the phosphor 4 with a peak wavelength of 410-900nm to form a first light-emitting unit with a color temperature of 2700K + -300K. Further, the first light emitting units are combined and mounted on the plate body 1, and then the light equalizing device 5 capable of transmitting light rays with the wavelength of more than 360nm is used as a lampshade to realize the emission of light rays according with continuous spectrum and radiance, so that the light source is formed.

According to a preferred embodiment, the LED lighting unit includes, but is not limited to, the following combinations:

embodiment 1

The combination of the above luminescent units 1/2/5, wherein the peak intensity ratio of each luminescent unit combination is 1:2:6 ═ 2-18: 1: (2-18);

example II

The combination of the light-emitting units 1/3 is performed, wherein the peak intensity ratio of each combination of light-emitting units is 1:3 ═ 2-18: 1;

example three

The combination of the above luminescent units 3/5, wherein the peak intensity ratio of each luminescent unit combination is 1:2:4 ═ 2-18: 1: (2-18).

According to a preferred embodiment, the above embodiment forms a complete continuous spectrum (360nm-800nm) with specific energy distribution by integrating light rays in various wavelength bands.

According to a preferred embodiment shown in fig. 2, the apparatus for light source preparation in an embodiment of the present invention may comprise one of the following components: a transfer module 10, a control module 20, a dispensing module 30, and a detection module 40. Specifically, the dispensing module 30 can apply a phosphor gel mixed by the phosphor 4 and a material such as epoxy, silicon gel, etc. onto the LED chip 60. The LED chip 60 in the present embodiment includes a first semiconductor chip 2 and a second semiconductor chip 3. Further, the fluorescent colloid on the LED chip 60 is hardened and cured after a certain time. The light generated from the LED chip 60 is radiated to the outside, and the hardened phosphor gel can support and protect the LED chip 60 to some extent. The most important point in adjusting the light emitting characteristics of the LED light source 100 is to adjust the amount of the fluorescent colloid.

According to a preferred embodiment shown in fig. 2, a fluorescent glue calibrated based on the emission intensity and the peak emission wavelength of the target LED chip 60 is applied to the surface of the LED chip 60 by the dispensing module 30. Preferably, the dispensing module 30 is configured to be movable in vertical and horizontal directions based on actual coating requirements.

According to a preferred embodiment shown in fig. 2, the plurality of LED chips 60 to be handled as one integral unit may be referred to as an LED array. Specifically, the LED array is a wire frame 50 as shown in fig. 3. Further, the wire frame 50 is formed in such a manner that a package 70 having a synthetic resin shape is regularly mounted on the plate body 1.

According to a preferred embodiment shown in fig. 3, any one of the LED chips 60 is bonded to the package 70, and the positive and negative electrodes of any one of the LED chips 60 are electrically connected to the electrode pads of the package 70 via first and second leads 71 and 72, respectively. Further, the wire frame 50 may be positioned at a corresponding region of the device shown in fig. 2 by a device such as a loader, and may be detached from the device after the wire frame 50 has completed its corresponding function.

According to a preferred embodiment shown in fig. 2, the transfer module 10 may transfer the wire frame 50 from the assignment module 30 to the detection module 40 or transfer the wire frame 50 from the detection module 40 to the assignment module 30. Specifically, when the wire frame 50 is fixed and the first electrode 51 and the second electrode 52 of the wire frame 50 are in an electrically isolated state from each other, the light emitting characteristics of the LED light source 100 mounted to the wire frame 50 may be measured by the detection module 40. Preferably, the first electrode 51 is a positive electrode and the second electrode 52 is a negative electrode. The detection module 40 can be moved horizontally above the wire frame 50 to detect the light emitting characteristics of any one of the LED light sources 100, to simultaneously detect the light emitting characteristics of several LED light sources 100 located in the wire frame 50. Preferably, the light emitting characteristics of the LED light source 100 detected by the detecting module 40 include, but are not limited to, light intensity, brightness, color temperature, and color coordinates. Alternatively, the horizontal movement of the wire frame 50 may be controlled by the transmission module 10 while the detection module 40 is fixed to measure the light emitting characteristics of any one of the LED light sources 100 at the same time.

According to a preferred embodiment, in the present embodiment, a probe (not shown) may be disposed below the wire frame 50, and one end of the probe close to the wire frame 50 abuts against the LED light source 100. Preferably, after external power is applied to the LED light source 100, the LED light source 100 generates emission light, and the receiving unit located at a local position above the wire frame 50 receives a light signal, and the detection module 40 measures the light emission characteristics of the LED light source 100.

According to a preferred embodiment, the control module 20 is capable of calculating a representative value of the lighting characteristics of the plurality of LED light sources 100 based on the lighting characteristics of any one of the LED light sources 100 measured by the detection module 40. Alternatively, exemplary values may include, but are not limited to, mean, median, and maximum or minimum values, and the like. In the embodiment of the present invention, an average value of the color coordinates of any one of the LED light sources 100 may be used as a schematic value. Alternatively, the standard deviation of the color coordinates of any of the LED light sources 100 is calculated simultaneously.

According to a preferred embodiment, the control module 20 is capable of calculating the average value of the color coordinates of any one of the LED light sources 100 on the wire frame 50 and the standard deviation thereof to find the distribution of the color coordinates. In addition, the fluorescent colloid has the greatest influence on the color coordinates of the LED light source 100, and thus the color coordinates of the LED light source 100 can be changed by adjusting the dispensing amount of the fluorescent colloid through the dispensing module 30. Preferably, the control module 20 calculates the amount of the fluorescent colloid required to move the color coordinate mean of the wire frame 50 to the calibration coordinates based on this manner, and sends the result to the dispensing module 30 for adjusting the amount of the fluorescent colloid. The correlation between the amount of the fluorescent colloid and the color coordinates of the LED light source 100 can be obtained by performing experiments and process simulations in advance to obtain a relevant data table or data set, and the relevant data table or data set is stored as a database, so that the control module 20 can obtain the dispensing amount of the required fluorescent colloid by querying the database to correct the color coordinates of the LED light source 100.

According to a preferred embodiment, in order to ensure the light emitting performance of the light emitting unit formed by the LED chips 60 exciting the phosphor 4, the control module 20 may adjust the dispensing gap when dispensing each LED chip 60 through the dispensing module 30, that is, the point selection of the dispensing module 30 when performing the dispensing operation is not fixed, and the gap between adjacent dispensing points is adjustable. The distribution module 30 may be provided with a monitoring unit, which may obtain the area and/or size of the corresponding glue spot after the dispensing operation of the distribution module 30 on any LED chip 60 is performed in real time by means of image capturing, and upload the corresponding image acquisition data to the control module 20. Specifically, in order to adapt to different dispensing requirements, the control module 20 may obtain a corresponding standard dispensing area and/or size by looking up a data table, and compare the standard dispensing area and/or size with the image data collected by the monitoring unit through an image analysis manner, so as to control the amount of the fluorescent glue dispensed onto the LED chip 60 by the dispensing module 30 based on the area and/or size difference therebetween. Preferably, the correlation between the amount of the fluorescent colloid and the standard dispensing area and/or size is related to parameters such as the structural size and the injection pressure of the specific dispensing equipment, and the correlation between the amount of the fluorescent colloid and the standard dispensing area and/or size can be obtained by performing experiments and process simulations in advance to obtain a relevant data table or data set, and the relevant data table or data set is stored as a database. Secondly, the control module 20 can preset an initial dispensing gap based on the phosphor 4 information and/or the information of the LED chip 60 stored in the database in advance, and control the moving distance of the dispensing module 30 in the vertical and/or horizontal direction to adjust the gap between adjacent dispensing dots based on the correlation between the dispensing area and/or size and the amount of the phosphor colloid as the dispensing operation proceeds, so that the phosphor colloid can be uniformly filled into the packaging gap.

According to a preferred embodiment, in order to avoid the fluorescent gel near the dispensing head of the dispensing module 30 from being blocked due to long-term exposure to air and condensation during dispensing, the dispensing module 30 may be provided with a heating unit. Specifically, the heating unit 301 may include a heater and a temperature sensor, and both of them are electrically connected to the control module 20. Further, the heater may be an electric heating wire or a heating plate disposed on the dispensing head surface of the dispensing module 30, which can be used to heat the fluorescent gel in the pipeline. The temperature sensor may be configured to be at least partially embedded within the delivery conduit to collect temperature data in a manner that senses changes in temperature thereof in direct contact with the fluorescent gel. Preferably, the control module 20 can control the start and stop of the heating unit 301, and control the heating power of the heater based on the real-time temperature data of the fluorescent colloid collected by the temperature sensor.

According to a preferred embodiment, the basic structure of the integrated LED light source generally includes a substrate (board body 1), LED chips 60 (first semiconductor chip 2, second semiconductor chip 3), and an encapsulating material, etc. Preferably, taking the copper substrate as an example, the copper substrate is mainly composed of a copper-clad layer, an insulating layer and a metal substrate layer. Further, when the LED chip 60 is mounted, the insulating layer on the surface of the substrate mounting region may be removed to form a reflective surface in at least a portion of the substrate mounting region, and the light reflection capability of the reflective surface is improved by means of plating, for example, so as to achieve thermoelectric separation of the packaged light source while reducing the overall thermal resistance of the substrate.

According to a preferred embodiment, the LED chips 60 are typically adhered closely to the blue film with gaps in an array. In addition, a die-spreading operation is usually required for the blue film to facilitate picking and positioning of the LED chip 60 during packaging. Further, the blue film is uniformly stretched by the expanding device, so that the closely arranged LED chips 60 can be effectively dispersed, the adhesive force of the blue film is significantly reduced, and the blue film can be supported by the crystal expanding operation. Preferably, the die-diced LED chips 60 have a more sharp boundary, the chips are spaced apart from one another more closely, and the difficulty of identification and/or pick-up is reduced.

According to a preferred embodiment, when the LED chips 60 are mounted on a specific mounting region of the substrate (board body 1) according to a certain arrangement rule, a die bond paste is required. The specific steps may include dispensing, chip picking, chip placing, and the like.

According to a preferred embodiment, the sealing compound is prepared by dropping the prepared fluorescent colloid in a cup of a support for bearing the first semiconductor chip 2 and/or the second semiconductor chip 3, so as to realize physical protection of the chips and generation of characteristic light after the chips excite the fluorescent powder.

According to a preferred embodiment, the dispensing of glue is preceded by a dispensing operation. Specifically, the balance is placed in a certain horizontal position during glue preparation, vibration is not allowed during use, and air flow is reduced as much as possible. Mixing the silica gel AB component and the fluorescent powder according to a ratio determined by an engineering test, wherein the weight of the powder is required to be accurate to a thousandth, and the weight of the gel is required to be accurate to a percentile. Secondly, stirring and vacuumizing by using a stirring defoaming machine to ensure that all the components are fully mixed without foaming. Preferably, because the specific gravity of the fluorescent powder in the formula is large, the equipment cannot be stirred uniformly, the fluorescent powder needs to be stirred for 10 minutes manually after stirring and defoaming in a stirring and vacuumizing machine, and then placed in a defoaming machine to rotate for 10 seconds after stirring for defoaming bubbles.

According to a preferred embodiment, before the dispensing operation, the bracket is firstly placed into an oven according to the material requirement and is firstly baked and dehumidified according to the requirement of 90 ℃/30 min. And (4) prejudging the drift degree of the color temperature of the light source and adjusting the dispensing amount. The equipment operation must be carried out strictly according to the operation standard book so that the equipment can run stably. Before the equipment runs, the position of the dispensing head must be adjusted, otherwise, the dispensing uniformity is influenced. When the equipment is operated, the dispensing heads are cleaned by every 3 supports, and the dispensing uniformity is prevented from being influenced by the glue of the dispensing heads. In each half of the material clamping (10 supports), the packaging material in the equipment needs to be removed, and the packaging material is added into the equipment after being re-stirred, so that the operation can be performed again. After the dispensing operation is completed by the dispensing equipment, the operation table is cleaned. When the ultrasonic cleaner is used for cleaning dispensing head accessories, the sealing gasket needs to be quickly cleaned and taken out, and the long-time soaking and cleaning is not needed. All parts must be cleaned to avoid solidification and blockage.

According to a preferred embodiment, the baking time after dispensing must be controlled well, otherwise uneven deposition of phosphor will result, and the baking should be performed strictly according to the material baking conditions, taking care that the baking conditions are different for different materials. Preferably, the baking method in this embodiment is: baking at 100 deg.C for 30min, and baking at 150 deg.C for 3 hr.

According to a preferred embodiment, the baking is followed by a spectral taping operation. Specifically, the parameters of the stripper are adjusted, so that the conditions of incomplete stripping, material blockage, material damage and the like are avoided. And then, adjusting parameters of the light splitter according to different light sources and customer requirements, and classifying and packaging lamp beads exceeding the standard Bin so as to be matched and utilized later. Preferably, parameters of the braider are adjusted at any time according to different light source types, and the braider needs to be clearly marked after being coiled to mark specification models, chip types, chip quantity, color temperature, color rendering index, spectrum, production time and the like.

According to a preferred embodiment, at least a wire bonding process is further included in the packaging process of the LED chip 60. Specifically, the wire bonding process connects the electrodes on the surface of the LED chip 60 to the pins of the adjacent chip and/or the substrate through a gold wire, so as to establish the circuit connection between the LED chip 60 and the external system. Furthermore, in addition to the aforementioned pre-step of packaging the LED light source, the post-plastic packaging operation is also required for the semi-finished LED light source that is qualified through detection.

According to a preferred embodiment, the plastic packaging operation may include plasma cleaning, phosphor 4 preparation, silica gel encapsulation, and colloid curing. In particular, plasma cleaning is performed in such a way that the surface to be cleaned is bombarded by ionized positively and/or negatively charged gas atoms or molecules, so that contaminants on the surface can be removed and thus be drawn away by negative pressure equipment. Oil stains and oxide layers on the surface of the LED light source after the bonding wires pass can be removed through plasma cleaning, so that the bonding strength between the packaging colloid and the LED chip 60 and between the packaging colloid and the substrate is improved, and the probability of inward permeation of air along the bonding surface is reduced.

According to a preferred embodiment, the preparation of the fluorescent colloid may comprise the preparation of the fluorescent colloid. Specifically, the colloid is prepared by adding a certain proportion or dosage of fluorescent powder into the masterbatch, uniformly stirring and separating colloid residual gas to form colloid with uniformly dispersed powder and moderate viscosity. The colloid coating is to coat the colloid onto the LED chip 60 quantitatively based on the parameters of the emission intensity and the peak emission wavelength of the target LED chip 60 to form a uniform and regular fluorescent layer.

According to a preferred embodiment, the silicone encapsulation is formed by dispensing and molding a transparent adhesive with a high refractive index onto the surface of the functional region of the substrate on which the LED chip 60 is mounted, so as to form a protective layer with high bonding strength and high impact resistance.

According to a preferred embodiment, the embodiment of the present invention further provides a lamp, which is a full spectrum LED lamp and may include a power supply, an LED light source, an optical lens, a heat dissipation body, a lampshade, and the like. Specifically, the LED light source includes a light source formed by a first light emitting unit, a second light emitting unit, and a second semiconductor chip 3 according to an arrangement combination manner.

According to a preferred embodiment, the light source used for daily and work-study lighting should have excellent color rendering, low blue light damage, and the spectrum of the light source is as close as possible to the standard spectrum. Secondly, the light source also needs to satisfy effective stimulation to the human body, for example, the light source can help to inhibit the secretion of melatonin, so that the user can concentrate more on the light source, and the work and study efficiency of the user is improved. Preferably, especially in night lighting, the influence of the light source on the circadian rhythm of the human body should be taken into account first to ensure that the light source has a low biological influence on the human body. Especially for users who have light source requirements during sleeping, the influence of the light source on the circadian rhythm of the human body should be considered to reduce the influence of the light source on melatonin secretion as much as possible and ensure a healthy sleeping environment.

Further, exposure to the appropriate light for the appropriate time is important for the health of the human body. Especially under high power light at a wavelength around 480nm, helps to bring people into the natural circadian cycle. But may result in a series of health risks if exposed to the wrong light for the wrong time and for a long period of time. For example, exposure of a person to LED light sources having a high optical power ratio between 450 and 500nm can significantly suppress melatonin secretion. Especially, if the secretion is inhibited for a long time at night, the human body matrix can be affected in various ways, the immunity of the human body is reduced, and even if the human body is exposed to the LED light source with high optical power ratio between 450 and 500nm for a long time, the cancer can be caused.

According to the device for preparing the light source and the lamp manufactured by the light source, the light source can emit light rays which accord with continuous spectrum and radiance; the LED lamp has good color rendering index, uniform light emitting color and proper intensity, has the color temperature of 2700K +/-300K and is approximately consistent with the color temperature of an incandescent light source, so that people feel warm and comfortable; the LED lamp can meet the basic lighting requirements, and the proportion occupied by the LED lamp in a blue light wave band is low, so that the harm of the blue light to a human body can be effectively reduced; the healthy and good lighting environment can be provided no matter day or night. In addition, when the light-emitting material is used for plant illumination, the spectral energy distribution and the light-emitting characteristic of the light-emitting material have beneficial promoting effects on the growth and development of plants.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. An apparatus for light source preparation, characterized in that it comprises at least:

a distribution module (30) for distributing the fluorescent colloid to the first semiconductor chip (2) with an emission peak wavelength of 360-490nm and/or the second semiconductor chip (3) with an emission peak wavelength of 700-800nm, and/or acquiring the area and/or size of the corresponding colloid point distributed to the first semiconductor chip (2) and/or the second semiconductor chip (3),

a detection module (40) for measuring a luminescence property of light emitted by a plurality of the first semiconductor chips (2) and/or second semiconductor chips (3) to which a fluorescent colloid is dispensed,

a control module (20) configured to calculate an indicative value for the light emission characteristic of at least one of the first semiconductor chip (2) and/or the second semiconductor chip (3) from the light emission characteristic measured by the detection module (40) and to adjust the dispensing amount of the fluorescent colloid by the dispensing module (30) based on the indicative value,

and/or adjusting the dispensing amount of the dispensing module (30) to the fluorescent glue based on the area and/or size of the glue spot acquired by the dispensing module (30) and controlling the movement of the dispensing module (30) to adjust the glue spot gap,

wherein,

the first semiconductor chip (2) is configured to form a first light emitting unit having a white color temperature range by exciting a phosphor (4) having an emission peak wavelength in a range of 410-900nm,

and the spectral radiance of the first light-emitting unit in the wavelength range of 360-800 nm is changed in a mode of gradually increasing to the middle part of the waveband and then reducing.

2. The device according to claim 1, wherein the first semiconductor chip (2) and the second semiconductor chip (3) are configured to excite a phosphor (4) having an emission peak wavelength in a range of 410-900nm after being connected in parallel or in series to form a second light emitting unit having a color temperature range of white light,

and the spectral radiance of the first light-emitting unit and/or the second light-emitting unit in the wavelength range of 360-800 nm is changed in a mode of gradually increasing to the middle part of the waveband and then reducing,

and the spectrum of the first light-emitting unit and/or the second light-emitting unit comprises at least two dividing points for distinguishing the energy fluctuation degree and/or the distribution capacity, wherein the shape of the spectrum on two sides of each dividing point is at least:

at least two closed regions with different areas can be formed in a spectral interval formed by the axis of any dividing point except the boundary end point of the energy spectral line and the dividing points on the two adjacent sides of the dividing point and the energy spectral line,

and in the first interval on two sides of the division point, the ray which is parallel to the wave band axis and is emitted from any point on the energy spectral line can form a closed area together with the energy spectral line and the ray which passes through the division point and is perpendicular to the wave band axis.

3. The apparatus according to one of the preceding claims, characterized in that it further comprises at least: a transfer module (10), the transfer module (10) being configured to control the transfer of the first semiconductor chip (2) and/or the second semiconductor chip (3) between the dispensing module (30) and the detection module (40).

4. Device according to one of the preceding claims, characterized in that a heating unit (301) for heating the fluorescent gel is arranged on the dispensing module (30) and that the activation of the heating unit (301) is controlled or driven by a control module (20), wherein the control or driving is done on the basis of real-time temperature detection values of the fluorescent gel.

5. The device as claimed in any one of the preceding claims, wherein the spectral radiances of the first and second light-emitting units in the wavelength range of 400-480nm account for 2-30% of the total spectral radiance, and the spectral radiances of the first and second light-emitting units in the wavelength range of 640-780nm account for 30-90% of the total spectral radiance.

6. The device as claimed in any one of the preceding claims, wherein the first and second light emitting units have a spectral energy maximum peak point in the wavelength range of 400-480nm of less than or equal to a spectral energy minimum peak point in the wavelength range of 640-780 nm.

7. Device according to one of the preceding claims, characterized in that the spectrum comprises at least six emission peaks in the wavelength range from 360nm to 800nm, wherein,

the peak intensity of the emission peak in the wavelength range of 640 nm-755 nm is the maximum, the peak intensity of the emission peak in the wavelength range of 360 nm-480 nm is the minimum, and the ratio of the peak intensities of the emission peaks is 1-50%.

8. The device according to one of the preceding claims, characterized in that the spectrum comprises at least two emission peaks in the wavelength range of 640nm to 780nm, wherein,

the maximum peak value of the spectral radiance corresponding to the emission peak in the wavelength range of 640nm to 755nm is the same as that corresponding to the emission peak in the wavelength range of 720nm to 780nm, and

the minimum peak value of the spectral radiance of the emission peak positioned in the wavelength range of 640nm to 755nm is smaller than the minimum peak value of the spectral radiance of the emission peak positioned in the wavelength range of 720nm to 780 nm.

9. Device according to one of the preceding claims, characterized in that the phosphor (4) preferably has an emission peak wavelength of 500-600nm, 600-700nm and/or 700-800 nm.

10. Device according to one of the preceding claims, characterized in that the first semiconductor chip (2) preferably has an emission peak wavelength of 380-470 nm.