WO2021072678A1 - Lamp source for improving color rendering index and method for changing color temperature - Google Patents

Lamp source for improving color rendering index and method for changing color temperature Download PDF

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Publication number
WO2021072678A1
WO2021072678A1 PCT/CN2019/111480 CN2019111480W WO2021072678A1 WO 2021072678 A1 WO2021072678 A1 WO 2021072678A1 CN 2019111480 W CN2019111480 W CN 2019111480W WO 2021072678 A1 WO2021072678 A1 WO 2021072678A1
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Prior art keywords
lamp
color
light
color temperature
filter
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PCT/CN2019/111480
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French (fr)
Chinese (zh)
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肖高利
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肖高利
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Priority to PCT/CN2019/111480 priority Critical patent/WO2021072678A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B44/00—Circuit arrangements for operating electroluminescent light sources

Definitions

  • the invention relates to the technical field of LED lamps, in particular to a lamp source for improving the color rendering index and a method for changing the color temperature.
  • LED As a lighting source.
  • the light source has strict requirements on the color rendering index in lighting fixtures.
  • the LED lighting market is still in a chaotic state, and the color rendering index of each company is uneven.
  • LED blue light poses a threat to the health of the fundus and easily induces related ophthalmic diseases, which becomes a restrictive issue in the promotion and application of LED lighting products.
  • the color rendering index refers to the degree to which an object is illuminated by a certain light source and a standard light source (usually using sunlight as a standard light source) to restore its essential color. It can be simply understood as chromatic aberration, the lower the color rendering index, the greater the chromatic aberration. The higher the color rendering index is conducive to improving the ability to recognize colors. However, the color rendering index of most of the existing fluorescent lamps and low-quality LED light sources is concentrated around 70, that is, about 30% of the original color of the object is lost. Long-term living and learning under such a lighting environment will inevitably lead to a decline in color discrimination ability. And decline, weak color, poor color recognition ability, etc. appear.
  • the current white light LED technology mainly adopts the manufacturing process of blue chip coated with phosphor powder, which follows the light-emitting principle of fluorescent tube to a certain extent. Due to the lack of red and green light components, this technology is inherently opposite. The defect of insufficient color rendering index. In addition, the spectrum of this white light has obvious blue spectrum peaks between 400nm and 500nm. However, blue light in this range has the potential to damage the retina.
  • the LED spherical lamp with adjustable primary color includes a metal lamp cap, a heat dissipation fin, and a spherical lamp shade.
  • the metal lamp cap is directly connected with the spherical lamp shade, and the heat dissipation fins are arranged on the outer side of the metal lamp cap.
  • the lamp holder is provided with an LED lamp and a circuit board, and is characterized in that the LED lamp includes at least three single lamp beads of red, green and blue, and a condensing lens is arranged in front of the LED lamp beads in the metal lamp holder.
  • the condenser lens includes a conical part and a hemispherical part, and the conical part and the hemispherical part face the LED lamp beads and the spherical lampshade respectively, and a semi-transparent diffuser plate is also provided near the focal point of the hemispherical part in the spherical lampshade ,
  • the translucent diffuser plate is a sphere, and the sphere is located at the focal point of the condenser lens, the LED lamp is mounted on an aluminum substrate, a slot is provided in the metal lamp holder, and the aluminum The substrate is inserted into the slot of the metal lamp holder from one side, and a touch joint is provided between the aluminum substrate and the slot to electrically connect the LED lamp beads and the circuit board;
  • the spherical lampshade has a rough surface structure on the inner surface Injection molded parts or glass products; a cylindrical channel is provided in the metal lamp holder between the LED lamp bead and the condenser lens, and the inner surface
  • the technical problem solved by the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a light source that improves the color rendering index by arranging a filter in front of the white light to filter out part of the blue light.
  • Another technical problem solved by the present invention is to adjust the current of each light source according to the brightness, chromaticity and color temperature of the red light, green light, and white light to achieve mixing in any proportion, as close as possible to natural light, so that the color rendering index A light source with improved color rendering index approaching 100.
  • Another technical problem solved by the present invention is to provide a method for changing the color temperature.
  • the light source for improving the color rendering index includes a housing.
  • the special feature is that a control board is arranged in the housing, and lamp beads are installed on the control board, and the lamp beads at least include Red, green and white lights, and a filter for filtering out part of the blue light is arranged in front of the white light.
  • a diffuser plate covering the effective area of the lamp bead is arranged in front of the filter, and the diffuser plate is arranged in the housing.
  • the filter can be configured as a band-pass filter or a cut-off filter.
  • the light source for improving the color rendering index includes a housing.
  • the special feature is that a control board is arranged in the housing, and lamp beads are installed on the control board.
  • a filter to filter out part of the blue light is set in the front.
  • the lamp beads include at least red, green, and white lamps.
  • a diffuser plate covering the effective area of the lamp bead is arranged in front of the filter, and the diffuser plate is arranged in the housing.
  • the filter can be configured as a band-pass filter or a cut-off filter.
  • Another technical solution of the present invention is the method for changing the color temperature, which is special in that it includes the following steps:
  • the white light among the white light, the green light and the red light is filtered by the filter to filter out the blue peak, and then the red light and the green light are mixed with the red light and the green light through the diffuser to form a single mixed color light;
  • the control board adjusts the current ratio based on the original brightness, chromaticity and color temperature of the red, green and white lights to achieve the purpose of adjusting the color mixing spectrum.
  • the method of adjusting the current of each lamp bead includes adjusting the current of the lamp bead to change the brightness, chromaticity and color temperature of the current lamp bead, that is, obtaining the brightness, chromaticity and color temperature of the current lamp bead under the current current through an optical instrument. Adjust the current of the red, green, and white lights before leaving the factory to adaptively adjust the brightness, chromaticity, and color temperature ratios of the red, green, and white lights to achieve the target brightness, chromaticity and color temperature of the mixed light.
  • the target brightness value, chromaticity value and color temperature value after multiple color mixing can be preset, and the color temperature calculation formula is:
  • x and y respectively represent the chromaticity value
  • ct represents the current color temperature value
  • te represents the intermediate calculation process value
  • a filter is arranged in front of the white lamp to filter out part of the blue light.
  • the present invention adjusts the current of each lamp source to achieve any ratio of mixing, approaching natural light as much as possible, and making the color rendering index approach 100.
  • the main control chip of the present invention can control the currents of the red, green and white lights through each control circuit to preset different color temperatures under the configuration of software, and can complete different color temperature control switching at the same time.
  • Figure 1 is an exploded schematic diagram of the structure of the LED lamp of the present invention
  • Figure 2 is a schematic diagram of the structure assembly of the LED lamp of the present invention.
  • Figure 3 is a schematic cross-sectional view of the structure assembly of the LED lamp of the present invention.
  • Figure 4 is a circuit block diagram of the lamp holder control board of the present invention.
  • Fig. 5 is a schematic diagram of the selection of the optical filter of the present invention.
  • Fig. 6 is a schematic diagram of the selection of optical filters of the present invention.
  • Figure 7 is a white light LED spectrum curve of the present invention.
  • Fig. 8 is a flow chart of the present invention for adaptively adjusting the brightness, chromaticity and color temperature of LED red, green and white lights.
  • the LED lamp 4 with improved color rendering index includes a housing 6.
  • the housing 6 is sequentially provided with an LED lamp holder 1 control board 2 and a white lamp 41 installed on the control board 2
  • the green light 42 and the red light 43 are separated on both sides of the white light 41.
  • a filter 3 for filtering out part of the blue light is arranged in front of the white light 41, and a filter 3 is arranged in front of the filter 3 to cover the effective area of the LED light 4.
  • the filter 3 can be configured as a band-pass filter or a cut-off filter.
  • the method for increasing the color rendering index of the lamp source and changing the color temperature of the lamp source includes the following steps:
  • the white light 41 among the white light 41, the green light 42, and the red light 43 is filtered by the filter 3 to filter out the blue peaks, and then the red light 43 and the green light 42 are mixed with the red light 43 and the green light 42 through the scattering plate 5 to form a single mixed color light;
  • the control board 2 adjusts the current ratio based on the original brightness, chromaticity, and color temperature of the red light 43, green light 42, and white light 41 to achieve the purpose of adjusting the color mixing spectrum.
  • the method of adjusting the current of each LED lamp 4 includes adjusting the current of the LED lamp 4 to change the brightness, chromaticity, and color temperature of the current LED lamp 4, that is, obtaining the current brightness, chromaticity, and color temperature of the current LED lamp 4 through an optical instrument. Chromaticity and color temperature, adjust the current size of white light 41, green light 42, red light 43 before leaving the factory to achieve adaptive adjustment of the brightness, chromaticity and color temperature ratio of white light 41, green light 42, red light 43 to achieve the goal The brightness, chromaticity and color temperature of the mixed light.
  • x and y respectively represent the chromaticity value
  • ct represents the current color temperature value
  • te represents the intermediate calculation process value
  • the main control chip of the present invention controls the current of the red light, green light, and white light through each control module under the configuration of software, so as to realize the change of the brightness value, chromaticity value and color temperature value after mixing. .
  • a variety of color temperatures can be preset according to actual needs, and can be selected arbitrarily in actual use.
  • the common white light spectrum curve is shown in Figure 7.
  • the white light spectrum has obvious blue spectrum peaks between 400nm and 500nm.
  • the bandpass filter of Figure 5 and Figure 6 can be used or cut off. Filter to filter out the blue peaks, according to the center wavelength and half-wave width of the peak of the blue spectrum of the current white light, select a bandpass filter with a difference of ⁇ 5nm from the center wavelength and a half-wave width of ⁇ 5nm. Choose a cut-off filter with a cut-off wavelength of 400nm and a total transmission wavelength of 500nm.
  • control method for adaptively adjusting the brightness, chromaticity, and color temperature of LED red, green and white lights includes the following steps:
  • Y r t a r ⁇ Y r ;
  • Y g t ag ⁇ Y g ;
  • Y w t a w ⁇ Y w ;
  • x and y represent the chromaticity value
  • Y represents the brightness value
  • C represents the color temperature value
  • ⁇ represents the ratio value adjusted to the theoretical brightness
  • r represents the red light
  • g represents the green light
  • w represents the white light
  • abs represents the mathematics Calculate the absolute value.
  • the current gain described in step (6) is the adjustment of i+ ⁇ i.
  • ⁇ i is positive
  • ⁇ i is negative.
  • the calculation formula of the color temperature value in step (2) is:
  • x and y respectively represent the chromaticity value
  • ct represents the current color temperature value
  • te represents the intermediate calculation process value
  • the selection principle of the filter in step (3) According to the center wavelength and half-wave width of the peak of the blue spectrum of the current white light, select the center wavelength difference ⁇ 5nm, half-wave width ⁇ 5nm For band-pass filters, a cut-off filter with a cut-off wavelength of 400nm and a total transmission wavelength of 500nm can also be selected.
  • the algorithm for improving the color rendering index of LED lights to approximate the natural spectrum includes:
  • Respectively are the ratio values to which the brightness should be adjusted under the current current
  • X T , Y T , Z T represent the target tristimulus value of the mixed color LED
  • X r , Y r , Z r represent the current tristimulus value of the red LED
  • X g , Y g , Z g represent the green LED
  • X w , Y w , Z w represent the current tristimulus value of the white LED
  • x T , y T represent the current color coordinates of the mixed color LED
  • x r , y r represent the current color coordinates of the red LED
  • X g , y g represent the current color coordinates of the green light LED
  • x w , y w represent the current color coordinates of the white light LED
  • the ratio of current brightness should be adjusted by formula (2), that is, a r ⁇ Y r , a g ⁇ Y g , a w ⁇ Y w are the chromaticity, brightness and color temperature of the target color mixture, respectively, red and green.
  • the brightness value to be adjusted to the white light theory at this time, it is necessary to adjust the current size by trial and error, use a spectrometer to collect the brightness value, and compare whether the brightness value obtained after adjusting the current is equal to the brightness value calculated by the algorithm, if not, continue to adjust
  • the current value repeats the process of comparing the brightness value collected by the spectrometer, and the successive approximation makes the brightness after the adjustment of the final current gain coincide with the brightness value that should be adjusted theoretically.
  • the calculation formula of the color temperature is:
  • x and y respectively represent the chromaticity value, ct represents the current color temperature value, and te represents the intermediate calculation process value;

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  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
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  • Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract

A lamp source for improving a color rendering index and a method for changing a color temperature. The lamp source for improving a color rendering index comprises a housing (6); a control board (2) is provided in the housing (6), lamp beads are mounted on the control board (2), the lamp beads at least comprise a red lamp (43), a green lamp (42) and a white lamp (41), and a filter (3) for filtering out some blue light is provided in front of the white lamp (41). The method for changing a color temperature comprises: (1) after the peak of blue light of a white lamp (41) among the white lamp (41), a green lamp (42) and a red lamp (43) is filtered out by a filter (3), the white lamp together with the red lamp (43) and the green lamp (42) achieve the purpose of color mixing by means of a scattering plate (5), so as to form a single color-mixed light ray; and (2) a control board (2) performs current proportion adjustment on the basis of the original brightness, chromaticity and color temperature of the red lamp (43), the green lamp (42) and the white lamp (41), so as to achieve the purpose of adjusting a color-mixed spectrum.

Description

提高显色指数的灯源及改变色温的方法Lamp source to improve color rendering index and method to change color temperature 技术领域Technical field
本发明涉及LED灯技术领域，特别涉及一种提高显色指数的灯源及改变色温的方法。The invention relates to the technical field of LED lamps, in particular to a lamp source for improving the color rendering index and a method for changing the color temperature.
背景技术Background technique
近年来，随着LED技术的不断发展，使LED作为照明光源成为可能，然而光源在照明灯具中对显色指数有着严格的要求。遗憾的是LED照明灯市场仍处于较为混乱的状态，各家显色指数参差不齐。另外LED也被证实LED蓝光会对眼底健康造成威胁，容易诱发相关眼科疾病，成为LED照明产品推广应用的限制性问题。In recent years, with the continuous development of LED technology, it is possible to use LED as a lighting source. However, the light source has strict requirements on the color rendering index in lighting fixtures. Regrettably, the LED lighting market is still in a chaotic state, and the color rendering index of each company is uneven. In addition, it has been confirmed that LED blue light poses a threat to the health of the fundus and easily induces related ophthalmic diseases, which becomes a restrictive issue in the promotion and application of LED lighting products.
显色指数是指物体用某一光源照明和用标准光源(一般以太阳光做标准光源)照明时，其还原本质颜色的程度。可以简单理解为色差，显色指数越低，色差越大。显色指数越高有利于提高对色彩的识别能力。然而现有的大部分荧光灯和劣质LED光源的显色指数集中在70左右，即损失了物体本来颜色的30％左右，在这样的照明环境下长期生活和学习，必然会导致辨色能力的下降和衰退，出现色弱、辨色能力差等情况。The color rendering index refers to the degree to which an object is illuminated by a certain light source and a standard light source (usually using sunlight as a standard light source) to restore its essential color. It can be simply understood as chromatic aberration, the lower the color rendering index, the greater the chromatic aberration. The higher the color rendering index is conducive to improving the ability to recognize colors. However, the color rendering index of most of the existing fluorescent lamps and low-quality LED light sources is concentrated around 70, that is, about 30% of the original color of the object is lost. Long-term living and learning under such a lighting environment will inevitably lead to a decline in color discrimination ability. And decline, weak color, poor color recognition ability, etc. appear.
当前白光LED技术，主要采用蓝光芯片覆涂荧光粉的制作工艺，从一定程度上沿袭了荧光灯管的发光原理，这种技术由于红光和绿光成分的缺少，使之天性上就存在着对显色指数不足的缺陷。另外此种白光的光谱在400nm到500nm之间存在明显的蓝光光谱尖峰。然而此波段范围的蓝光存在对视网膜损伤的潜能。The current white light LED technology mainly adopts the manufacturing process of blue chip coated with phosphor powder, which follows the light-emitting principle of fluorescent tube to a certain extent. Due to the lack of red and green light components, this technology is inherently opposite. The defect of insufficient color rendering index. In addition, the spectrum of this white light has obvious blue spectrum peaks between 400nm and 500nm. However, blue light in this range has the potential to damage the retina.
综上所述，现有技术存在以下的不足：In summary, the prior art has the following shortcomings:
⑴目前现有方案通过调整覆涂材料成本较高。⑴ At present, the cost of overcoating materials is relatively high through adjustment of existing schemes.
⑵且通过覆涂材料的调整，在使用过程中易受到温度的影响。⑵ And through the adjustment of overcoating materials, it is easy to be affected by temperature during use.
⑶有的通过增加红粉来提高R9等的显色指数，成本较高。⑶ Some increase the red powder to improve the color rendering index of R9, etc., and the cost is higher.
⑷通过增加红绿蓝灯珠的方案，不能有效降低蓝光的干扰，同时不能任意调整发光的亮度、色度达到提高显色指数的效果。⑷By adding red, green and blue lamp beads, the interference of blue light cannot be effectively reduced, and the brightness and chromaticity of the light cannot be adjusted arbitrarily to achieve the effect of improving the color rendering index.
CN201310305673.3公开了一种基色可调的LED球形灯,它的目的是提供一种解决多基色LED灯出现眩光的问题，光线更加柔和的基色可调的LED球形灯。该技术方案：所述基色可调的LED球形灯，包括金属灯头、散热翅片和球形灯罩，所述金属灯头直接与球形灯罩连接，且在所述金属灯头的外侧设置散热翅片，在金属灯头中设有LED灯以及电路板，其特征在于，所述LED灯至少包括红、绿、蓝三个单体灯珠，所述金属灯头中LED灯珠的前方设置一个聚光透镜，所述聚光透镜包括圆锥部和半球形部，且所述圆锥部和半球形部分别朝向LED灯珠和球形灯罩，在所述球形灯罩中的半球形部的焦点附近还设有一个半透明散射板，所述的半透明散射板为一圆球，且圆球位于聚光透镜的焦点部位，所述LED灯安装 在一个铝基板上，在所述金属灯头中设有一个插槽，所述铝基板自一侧***金属灯头的插槽中，且在铝基板和插槽之间设有将LED灯珠和电路板进行电连接的触碰接头；所述球形灯罩为内表面具有毛面结构的注塑件或者玻璃制品；在所述LED灯珠和聚光透镜之间的金属灯头内设有一个圆筒状的通道，且在所述通道的内表面为镜面。其不足之处是:该LED球形灯只是简单组合不同的灯珠，且没有根据灯珠的发光曲线进行有选择性的蓝光滤除，同时未进行灯珠的控制来提高显色指数。CN201310305673.3 discloses an LED spherical lamp with adjustable primary colors, and its purpose is to provide an LED spherical lamp with adjustable primary colors that solves the glare problem of multi-primary LED lamps and has softer light. The technical solution: The LED spherical lamp with adjustable primary color includes a metal lamp cap, a heat dissipation fin, and a spherical lamp shade. The metal lamp cap is directly connected with the spherical lamp shade, and the heat dissipation fins are arranged on the outer side of the metal lamp cap. The lamp holder is provided with an LED lamp and a circuit board, and is characterized in that the LED lamp includes at least three single lamp beads of red, green and blue, and a condensing lens is arranged in front of the LED lamp beads in the metal lamp holder. The condenser lens includes a conical part and a hemispherical part, and the conical part and the hemispherical part face the LED lamp beads and the spherical lampshade respectively, and a semi-transparent diffuser plate is also provided near the focal point of the hemispherical part in the spherical lampshade , The translucent diffuser plate is a sphere, and the sphere is located at the focal point of the condenser lens, the LED lamp is mounted on an aluminum substrate, a slot is provided in the metal lamp holder, and the aluminum The substrate is inserted into the slot of the metal lamp holder from one side, and a touch joint is provided between the aluminum substrate and the slot to electrically connect the LED lamp beads and the circuit board; the spherical lampshade has a rough surface structure on the inner surface Injection molded parts or glass products; a cylindrical channel is provided in the metal lamp holder between the LED lamp bead and the condenser lens, and the inner surface of the channel is a mirror surface. The disadvantage is that the LED ball lamp simply combines different lamp beads, and does not perform selective blue light filtering according to the light emission curve of the lamp beads, and does not control the lamp beads to improve the color rendering index.
技术问题technical problem
本发明所解决的技术问题在于克服上述现有技术的不足而提供一种通过白灯前面设置用以滤除部分蓝光的滤光片来提高显色指数的灯源。本发明所解决的另一技术问题是根据红灯、绿灯、白灯的亮度、色度、色温分别进行调整各灯源的电流来实现任意比例的混合，尽可能的逼近自然光，使得显色指数逼近100的提高显色指数的灯源。本发明所解决的再一技术问题是提供一种改变色温的方法。The technical problem solved by the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a light source that improves the color rendering index by arranging a filter in front of the white light to filter out part of the blue light. Another technical problem solved by the present invention is to adjust the current of each light source according to the brightness, chromaticity and color temperature of the red light, green light, and white light to achieve mixing in any proportion, as close as possible to natural light, so that the color rendering index A light source with improved color rendering index approaching 100. Another technical problem solved by the present invention is to provide a method for changing the color temperature.
技术解决方案Technical solutions
本发明的技术解决方案是所述提高显色指数的灯源，包括壳体，其特殊之处在于，所述壳体内设有控制板，控制板上安装有灯珠，所述灯珠至少包括红、绿、白灯，所述白灯前方设置用以滤除部分蓝光的滤光片。The technical solution of the present invention is that the light source for improving the color rendering index includes a housing. The special feature is that a control board is arranged in the housing, and lamp beads are installed on the control board, and the lamp beads at least include Red, green and white lights, and a filter for filtering out part of the blue light is arranged in front of the white light.
作为优选：滤光片前方设置一覆盖灯珠有效面积的散射板，所述散射板设置在壳体内。Preferably, a diffuser plate covering the effective area of the lamp bead is arranged in front of the filter, and the diffuser plate is arranged in the housing.
作为优选：滤光片可设置为带通滤光片或截止滤光片。Preferably, the filter can be configured as a band-pass filter or a cut-off filter.
本发明的另一技术解决方案是所述提高显色指数的灯源，包括壳体，其特殊之处在于，所述壳体内设有控制板，控制板上安装有灯珠，所述灯珠前方设置用以滤除部分蓝光的滤光片。Another technical solution of the present invention is that the light source for improving the color rendering index includes a housing. The special feature is that a control board is arranged in the housing, and lamp beads are installed on the control board. A filter to filter out part of the blue light is set in the front.
作为优选：所述灯珠至少包括红、绿、白灯。Preferably, the lamp beads include at least red, green, and white lamps.
作为优选：滤光片前方设置一覆盖灯珠有效面积的散射板，所述散射板设置在壳体内。Preferably, a diffuser plate covering the effective area of the lamp bead is arranged in front of the filter, and the diffuser plate is arranged in the housing.
作为优选：滤光片可设置为带通滤光片或截止滤光片。Preferably, the filter can be configured as a band-pass filter or a cut-off filter.
本发明的再一技术解决方案是所述改变色温的方法，其特殊之处在于，包括以下步骤：Another technical solution of the present invention is the method for changing the color temperature, which is special in that it includes the following steps:
⑴白灯、绿灯、红灯中的白灯经过滤光片过滤掉蓝光的尖峰后，与红灯和绿灯经过散射板实现混色目的形成单一混色光线；⑴The white light among the white light, the green light and the red light is filtered by the filter to filter out the blue peak, and then the red light and the green light are mixed with the red light and the green light through the diffuser to form a single mixed color light;
⑵控制板基于红灯、绿灯、白灯原有的亮度、色度、色温进行电流比例调整达到调整混色光谱的目的。⑵The control board adjusts the current ratio based on the original brightness, chromaticity and color temperature of the red, green and white lights to achieve the purpose of adjusting the color mixing spectrum.
作为优选：调整各灯珠电流的方法包括，调整灯珠电流以改变当前灯珠的亮度、色度及色温，即，通过光学仪器获取当前灯珠当前电流下的亮度、色度及色温，在出厂前调整红、绿、白灯的电流大小来达到自适应地调整红、绿、白灯的亮度、色度、色温配比，实现目标 混光的亮度、色度及色温。Preferably, the method of adjusting the current of each lamp bead includes adjusting the current of the lamp bead to change the brightness, chromaticity and color temperature of the current lamp bead, that is, obtaining the brightness, chromaticity and color temperature of the current lamp bead under the current current through an optical instrument. Adjust the current of the red, green, and white lights before leaving the factory to adaptively adjust the brightness, chromaticity, and color temperature ratios of the red, green, and white lights to achieve the target brightness, chromaticity and color temperature of the mixed light.
作为优选：可预设多种混色后的目标亮度值、色度值及色温值，色温的计算公式为：As a preference: the target brightness value, chromaticity value and color temperature value after multiple color mixing can be preset, and the color temperature calculation formula is:
te＝(x-0.332)/(y-0.1858)te=(x-0.332)/(y-0.1858)
ct＝5514.31-437*te*te*te+3601*te*te-6831*tect=5514.31-437*te*te*te+3601*te*te-6831*te
式中，x、y分别代表色度值，ct代表当前色温值，te代表中间计算过程值；In the formula, x and y respectively represent the chromaticity value, ct represents the current color temperature value, and te represents the intermediate calculation process value;
改变各单色灯的电流比例，将改变混色后的色度值，色度值的改变将改变混色后的色温；故能根据需要进行色温配置。Changing the current ratio of each monochromatic lamp will change the chromaticity value after color mixing, and the change of chromaticity value will change the color temperature after color mixing; therefore, the color temperature configuration can be carried out as needed.
有益效果Beneficial effect
⑴本发明在白灯前面设置有滤光片用以滤除部分蓝光。(1) In the present invention, a filter is arranged in front of the white lamp to filter out part of the blue light.
⑵本发明根据红灯、绿灯、白灯的亮度、色度、色温进行分别调整各个灯源的电流来实现任意比例的混合，尽可能的逼近自然光，使得显色指数逼近100。(2) According to the brightness, chromaticity, and color temperature of the red, green, and white lights, the present invention adjusts the current of each lamp source to achieve any ratio of mixing, approaching natural light as much as possible, and making the color rendering index approach 100.
⑶本发明的主控芯片可以在软件的配置下通过各控制电路分别控制红绿白灯的电流预设不同的色温，同时可以完成不同的色温控制切换。(3) The main control chip of the present invention can control the currents of the red, green and white lights through each control circuit to preset different color temperatures under the configuration of software, and can complete different color temperature control switching at the same time.
附图说明Description of the drawings
图1是本发明LED灯的结构分解示意图；Figure 1 is an exploded schematic diagram of the structure of the LED lamp of the present invention;
图2是本发明LED灯的结构装配示意图；Figure 2 is a schematic diagram of the structure assembly of the LED lamp of the present invention;
图3是本发明LED灯的结构装配剖面示意图；Figure 3 is a schematic cross-sectional view of the structure assembly of the LED lamp of the present invention;
图4是本发明灯头控制板的电路框图；Figure 4 is a circuit block diagram of the lamp holder control board of the present invention;
图5是本发明滤光片选配示意图；Fig. 5 is a schematic diagram of the selection of the optical filter of the present invention;
图6是本发明滤光片选配示意图；Fig. 6 is a schematic diagram of the selection of optical filters of the present invention;
图7是本发明白光LED光谱曲线；Figure 7 is a white light LED spectrum curve of the present invention;
图8是本发明自适应调整LED红绿白灯亮度、色度、色温控制流程图。Fig. 8 is a flow chart of the present invention for adaptively adjusting the brightness, chromaticity and color temperature of LED red, green and white lights.
主要组件符号说明：Symbol description of main components:
LED灯头1              LED控制板2            滤光片3 LED lamp holder 1 LED control board 2 Filter 3
LED灯4                白灯41                绿灯42 LED light 4 White light 41 Green light 42
红灯43                散射板5               灯壳6 Red light 43 Scattering plate 5 Lamp housing 6
本发明的最佳实施方式The best mode of the present invention
本发明下面将结合附图作进一步详述：The present invention will be described in further detail below in conjunction with the accompanying drawings:
请参阅图1至图3所示，该提高显色指数的LED灯4，包括壳体6，所述壳体6内依次设有LED灯头1控制板2、控制板2上安装的白灯41、分立在白灯41两边的绿灯42、红灯43，所述白灯41前方设置用以滤除部分蓝光的滤光片3，所述滤光片3前方设置一覆盖LED灯4有效面积的散射板5。滤光片3可设置为带通滤光片或截止滤光片。Please refer to Figures 1 to 3, the LED lamp 4 with improved color rendering index includes a housing 6. The housing 6 is sequentially provided with an LED lamp holder 1 control board 2 and a white lamp 41 installed on the control board 2 The green light 42 and the red light 43 are separated on both sides of the white light 41. A filter 3 for filtering out part of the blue light is arranged in front of the white light 41, and a filter 3 is arranged in front of the filter 3 to cover the effective area of the LED light 4. Scattering plate 5. The filter 3 can be configured as a band-pass filter or a cut-off filter.
请参阅图1至图4所示，所述提高显色指数的灯源及改变灯源色温的方法，包括以下步骤：Please refer to Figures 1 to 4, the method for increasing the color rendering index of the lamp source and changing the color temperature of the lamp source includes the following steps:
⑴白灯41、绿灯42、红灯43中的白灯41经过滤光片3过滤掉蓝光的尖峰后，与红灯43和绿灯42经过散射板5实现混色目的形成单一混色光线；(1) The white light 41 among the white light 41, the green light 42, and the red light 43 is filtered by the filter 3 to filter out the blue peaks, and then the red light 43 and the green light 42 are mixed with the red light 43 and the green light 42 through the scattering plate 5 to form a single mixed color light;
⑵控制板2基于红灯43、绿灯42、白灯41原有的亮度、色度、色温进行电流比例调整达到调整混色光谱的目的。(2) The control board 2 adjusts the current ratio based on the original brightness, chromaticity, and color temperature of the red light 43, green light 42, and white light 41 to achieve the purpose of adjusting the color mixing spectrum.
本实施例中，调整各LED灯4电流的方法包括，调整LED灯4电流以改变当前LED灯4的亮度、色度及色温，即，通过光学仪器获取当前LED灯4当前电流下的亮度、色度及色温，在出厂前调整白灯41、绿灯42、红灯43的电流大小来达到自适应地调整白灯41、绿灯42、红灯43的亮度、色度、色温配比，实现目标混光的亮度、色度及色温。In this embodiment, the method of adjusting the current of each LED lamp 4 includes adjusting the current of the LED lamp 4 to change the brightness, chromaticity, and color temperature of the current LED lamp 4, that is, obtaining the current brightness, chromaticity, and color temperature of the current LED lamp 4 through an optical instrument. Chromaticity and color temperature, adjust the current size of white light 41, green light 42, red light 43 before leaving the factory to achieve adaptive adjustment of the brightness, chromaticity and color temperature ratio of white light 41, green light 42, red light 43 to achieve the goal The brightness, chromaticity and color temperature of the mixed light.
本实施例中，可预设多种混色后的目标亮度值、色度值及色温值，色温的计算公式为：In this embodiment, multiple target brightness values, chromaticity values, and color temperature values after color mixing can be preset, and the color temperature calculation formula is:
te＝(x-0.332)/(y-0.1858)te=(x-0.332)/(y-0.1858)
ct＝5514.31-437*te*te*te+3601*te*te-6831*tect=5514.31-437*te*te*te+3601*te*te-6831*te
式中，x、y分别代表色度值，ct代表当前色温值，te代表中间计算过程值；In the formula, x and y respectively represent the chromaticity value, ct represents the current color temperature value, and te represents the intermediate calculation process value;
改变各单色LED灯4的电流比例，将改变混色后的色度值，色度值的改变将改变混色后的色温；故能根据需要进行色温配置。Changing the current ratio of each single-color LED lamp 4 will change the chromaticity value after color mixing, and the change of the chromaticity value will change the color temperature after color mixing; therefore, the color temperature configuration can be performed as needed.
请参阅图4所示，本发明的主控芯片在软件的配置下，通过各控制模块分别控制红灯、绿灯、白灯的电流，实现改变混灯后的亮度值、色度值和色温值。同时可以根据实际需要预设多种色温，实际使用时可任意选择。Please refer to FIG. 4, the main control chip of the present invention controls the current of the red light, green light, and white light through each control module under the configuration of software, so as to realize the change of the brightness value, chromaticity value and color temperature value after mixing. . At the same time, a variety of color temperatures can be preset according to actual needs, and can be selected arbitrarily in actual use.
请参阅图5至图7所示，常见的白色灯光谱曲线如图7白光的光谱在400nm到500nm之间存在明显的蓝光光谱尖峰，可采用图5和图6的带通滤光片或者截止滤光片来滤除蓝光尖峰，根据当前白灯的蓝色光谱段尖峰的中心波长及半波宽度，选择与其中心波长相差≤5nm，半波宽度也≤5nm的带通滤光片，也可以选择截止波长为400nm且全透过波长为500nm的截止滤光片。Please refer to Figure 5 to Figure 7. The common white light spectrum curve is shown in Figure 7. The white light spectrum has obvious blue spectrum peaks between 400nm and 500nm. The bandpass filter of Figure 5 and Figure 6 can be used or cut off. Filter to filter out the blue peaks, according to the center wavelength and half-wave width of the peak of the blue spectrum of the current white light, select a bandpass filter with a difference of ≤5nm from the center wavelength and a half-wave width of ≤5nm. Choose a cut-off filter with a cut-off wavelength of 400nm and a total transmission wavelength of 500nm.
请参阅图8所示，所述自适应调整LED红绿白灯亮度、色度、色温的控制方法，包括以下步骤：Please refer to FIG. 8, the control method for adaptively adjusting the brightness, chromaticity, and color temperature of LED red, green and white lights includes the following steps:
⑴***启动，初始化；⑴ System startup and initialization;
⑵分别设置红、绿、白灯的初始电流增益i r、i g、i w,光谱仪采集各灯珠的光谱曲线，得到灯珠的色度、亮度、色温值； ⑵Set the initial current gains i r , i g , i w of the red, green, and white lamps respectively, and the spectrometer collects the spectral curve of each lamp bead to obtain the chromaticity, brightness, and color temperature of the lamp bead;
⑶根据采集的白色灯的光谱曲线，选用对应滤光片置于白色灯前方；⑶ According to the collected spectrum curve of the white lamp, select the corresponding filter and place it in front of the white lamp;
⑷采集红灯、绿灯及经过滤光片的白灯的色度、亮度、色温值x r、y r、Y r、C r、x g、y g、Y g、C g、x w、y w、Y w、C w； ⑷Collect the chromaticity, brightness, and color temperature values of red light, green light and white light through the filter x r , y r , Y r , C r , x g , y g , Y g , C g , x w , y w , Y w , C w ;
⑸设置混灯后的亮度、色度、色温值，根据提高LED灯显色指数逼近自然光谱的算法计算得到红绿白灯的理论调整值，⑸ Set the brightness, chromaticity, and color temperature values after mixing the lights, and calculate the theoretical adjustment values of the red, green and white lights according to the algorithm that improves the color rendering index of the LED lights to approach the natural spectrum.
Y r t＝a r×Y r；Y g t＝a g×Y g；Y w t＝a w×Y w； Y r t =a r ×Y r ;Y g t = ag ×Y g ;Y w t =a w ×Y w ;
⑹设置电流增益为i r+Δi r、i g+Δi g、i w+Δi w； ⑹Set the current gain as i r +Δi r , i g +Δi g , i w +Δi w ;
⑺采集当前电流增益下的红灯、绿灯及经过滤光片的白灯的色度、亮度、色温值x r'、y r'、Y r′、C r′、x g′、y g′、Y g′、C g′、x w′、y w′、Y w′、C w′； ⑺ Collect the chromaticity, brightness, and color temperature values of the red light, the green light and the white light through the filter under the current current gain x r ', y r ', Y r ′, C r ′, x g ′, y g ′ , Y g ′, C g ′, x w ′, y w ′, Y w ′, C w ′;
⑻判断abs((Y r'-Y r t)/Y r t)≤Δe&&abs((Y g'-Y g t)/Y g t)≤Δe&&abs((Y w'-Y w t)/Y w t)≤Δe； Analyzing ⑻ abs ((Y r '-Y r t) / Y r t) ≤Δe && abs ((Y g' -Y g t) / Y g t) ≤Δe && abs ((Y w '-Y w t) / Y w t )≤Δe;
⑼若判断为否，则返回步骤⑹；⑼If the judgment is no, then return to step ⑹;
⑽若判断为是，则当前电流增益i r+Δi r、i g+Δi g、i w+Δi w满足要求； ⑽ If the judgment is yes, the current current gain i r +Δi r , i g +Δi g , i w +Δi w meet the requirements;
式中：x、y分别代表色度值，Y代表亮度值，C代表色温值；α代表前述理论亮度调整到的比例值，r代表红灯；g代表绿灯；w代表白灯；abs代表数学计算取绝对值。Where: x and y represent the chromaticity value, Y represents the brightness value, and C represents the color temperature value; α represents the ratio value adjusted to the theoretical brightness, r represents the red light; g represents the green light; w represents the white light; abs represents the mathematics Calculate the absolute value.
本实施例中，步骤⑹所述的电流增益为i+Δi的调整，当Y'-Y t＜0时Δi取正，当Y'-Y t＞0时Δi取负。 In this embodiment, the current gain described in step (6) is the adjustment of i+Δi. When Y'-Y t <0, Δi is positive, and when Y'-Y t > 0, Δi is negative.
本实施例中，步骤⑵所述色温值的计算公式为：In this embodiment, the calculation formula of the color temperature value in step (2) is:
te＝(x-0.332)/(y-0.1858)       (3)te=(x-0.332)/(y-0.1858) (3)
ct＝5514.31-437*te*te*te+3601*te*te-6831*te  (4)ct=5514.31-437*te*te*te+3601*te*te-6831*te (4)
式中，x、y分别代表色度值，ct代表当前色温值，te代表中间计算过程值；In the formula, x and y respectively represent the chromaticity value, ct represents the current color temperature value, and te represents the intermediate calculation process value;
由公式⑶、公式⑷可知，改变各单色LED灯的电流比例，将改变混色后的色度值，色度值的改变将改变混色后的色温；故能根据需要预设不同的色温。It can be seen from formula (3) and formula (4) that changing the current ratio of each monochromatic LED lamp will change the chromaticity value after color mixing, and the change of chromaticity value will change the color temperature after color mixing; therefore, different color temperatures can be preset according to needs.
本实施例中，步骤⑶所述滤光片的选配原则：根据当前白灯的蓝色光谱段尖峰的中心波长及半波宽度，选择与其中心波长相差≤5nm，半波宽度也≤5nm的带通滤光片，也可以选择截止波长为400nm且全透过波长为500nm的截止滤光片。In this embodiment, the selection principle of the filter in step (3): According to the center wavelength and half-wave width of the peak of the blue spectrum of the current white light, select the center wavelength difference ≤5nm, half-wave width ≤5nm For band-pass filters, a cut-off filter with a cut-off wavelength of 400nm and a total transmission wavelength of 500nm can also be selected.
请参阅图1至图8所示，所述提高LED灯显色指数逼近自然光谱的算法，包括：Please refer to Figures 1 to 8, the algorithm for improving the color rendering index of LED lights to approximate the natural spectrum includes:
为调整得到设定的亮度、色度、色温，需要更改红灯、绿灯、白灯的电流大小,以下所示为亮度调整算法：In order to adjust the set brightness, chromaticity, and color temperature, you need to change the current size of the red, green, and white lights. The following shows the brightness adjustment algorithm:
Figure PCTCN2019111480-appb-000001
Figure PCTCN2019111480-appb-000001
其中：among them:
Figure PCTCN2019111480-appb-000002
Figure PCTCN2019111480-appb-000002
Figure PCTCN2019111480-appb-000003
Figure PCTCN2019111480-appb-000003
分别为在当前电流下亮度应该调整到的比例值；Respectively are the ratio values to which the brightness should be adjusted under the current current;
式中：用X T、Y T、Z T表示混色LED的目标三刺激值，X r、Y r、Z r表示红灯LED的当前三刺激值，X g、Y g、Z g表示绿色LED的当前三刺激值，X w、Y w、Z w表示白灯LED的当前三刺激值，x T、y T表示混色LED的当前色坐标，x r、y r表示红灯LED的当前色坐标，x g、y g表示绿灯LED的当前色坐标，x w、y w表示白灯LED的当前色坐标； Where: X T , Y T , Z T represent the target tristimulus value of the mixed color LED, X r , Y r , Z r represent the current tristimulus value of the red LED, and X g , Y g , Z g represent the green LED X w , Y w , Z w represent the current tristimulus value of the white LED, x T , y T represent the current color coordinates of the mixed color LED, x r , y r represent the current color coordinates of the red LED , X g , y g represent the current color coordinates of the green light LED, x w , y w represent the current color coordinates of the white light LED;
经整理可得应该调整到的当前亮度的比例：After sorting, you can get the current brightness ratio that should be adjusted:
Figure PCTCN2019111480-appb-000004
Figure PCTCN2019111480-appb-000004
通过公式(2)式即可得到应该调整当前亮度的比例，即a r×Y r，a g×Y g，a w×Y w分别为达到目标混色的色度、亮度色温各单独红、绿、白灯理论要调整到的亮度值；此时需要采用试凑法调整电流大小，采用光谱仪采集亮度值，对比调整电流后得到的亮度值是否与算法计算的亮度值相等，如果不相等继续调整电流值重复光谱仪采集亮度值做比对的过程，逐次逼近使得最终电流增益的调整后亮度与理论应该调整到的亮度值吻合。 The ratio of current brightness should be adjusted by formula (2), that is, a r × Y r , a g × Y g , a w × Y w are the chromaticity, brightness and color temperature of the target color mixture, respectively, red and green. , The brightness value to be adjusted to the white light theory; at this time, it is necessary to adjust the current size by trial and error, use a spectrometer to collect the brightness value, and compare whether the brightness value obtained after adjusting the current is equal to the brightness value calculated by the algorithm, if not, continue to adjust The current value repeats the process of comparing the brightness value collected by the spectrometer, and the successive approximation makes the brightness after the adjustment of the final current gain coincide with the brightness value that should be adjusted theoretically.
本实施例中，所述色温的计算公式为：In this embodiment, the calculation formula of the color temperature is:
te＝(x-0.332)/(y-0.1858)     (3)te=(x-0.332)/(y-0.1858) (3)
ct＝5514.31-437*te*te*te+3601*te*te-6831*te  (4)ct=5514.31-437*te*te*te+3601*te*te-6831*te (4)
式中：x、y分别代表色度值，ct代表当前色温值，te代表中间计算过程值；In the formula: x and y respectively represent the chromaticity value, ct represents the current color temperature value, and te represents the intermediate calculation process value;
由公式⑴至公式⑷可知，改变各单色LED灯的电流比例，将改变混色后的色度值，色度值的改变将改变混色后的色温；故能根据需要预设不同的色温。It can be seen from formula ⑴ to formula ⑷ that changing the current ratio of each single-color LED lamp will change the chromaticity value after color mixing, and the change of chromaticity value will change the color temperature after color mixing; therefore, different color temperatures can be preset according to needs.
工业实用性Industrial applicability
以上所述仅为本发明的较佳实施例，凡依本发明权利要求范围所做的均等变化与修饰，皆应属本发明权利要求的涵盖范围。The foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims (10)

  1. 一种提高显色指数的灯源，包括壳体，其特征在于，所述壳体内设有控制板，控制板上安装有灯珠，所述灯珠至少包括红、绿、白灯，所述白灯前方设置用以滤除部分蓝光的滤光片。A light source with improved color rendering index, comprising a housing, characterized in that a control board is arranged in the housing, and lamp beads are installed on the control board, and the lamp beads include at least red, green, and white lamps. A filter to filter out part of the blue light is arranged in front of the white light.
  2. 根据权利要求1所述提高显色指数的灯源，其特征在于，滤光片前方设置一覆盖灯珠有效面积的散射板，所述散射板设置在壳体内。The lamp source with improved color rendering index according to claim 1, wherein a diffuser plate covering the effective area of the lamp bead is arranged in front of the filter, and the diffuser plate is arranged in the housing.
  3. 根据权利要求1所述提高显色指数的灯源，其特征在于，滤光片可设置为带通滤光片或截止滤光片。The lamp source with improved color rendering index according to claim 1, wherein the filter can be configured as a band-pass filter or a cut-off filter.
  4. 一种提高显色指数的灯源，包括壳体，其特征在于，所述壳体内设有控制板，控制板上安装有灯珠，所述灯珠前方设置用以滤除部分蓝光的滤光片。A lamp source with improved color rendering index, comprising a housing, wherein the housing is provided with a control board, lamp beads are installed on the control board, and a filter for filtering out part of the blue light is arranged in front of the lamp beads sheet.
  5. 根据权利要求4所述提高显色指数的灯源，其特征在于，所述灯珠至少包括红、绿、白灯。The lamp source with improved color rendering index according to claim 4, wherein the lamp beads at least include red, green, and white lamps.
  6. 根据权利要求4所述提高显色指数的灯源，其特征在于，滤光片前方设置一覆盖灯珠有效面积的散射板，所述散射板设置在壳体内。The lamp source with improved color rendering index according to claim 4, wherein a diffuser plate covering the effective area of the lamp bead is arranged in front of the filter, and the diffuser plate is arranged in the housing.
  7. 根据权利要求4所述提高显色指数的灯源，其特征在于，滤光片可设置为带通滤光片或截止滤光片。The lamp source with improved color rendering index according to claim 4, wherein the filter can be configured as a band-pass filter or a cut-off filter.
  8. 一种改变色温的方法，其特征在于，包括以下步骤：A method for changing color temperature is characterized in that it comprises the following steps:
    ⑴白灯、绿灯、红灯中的白灯经过滤光片过滤掉蓝光的尖峰后，与红灯和绿灯经过散射板实现混色目的形成单一混色光线；⑴The white light among the white light, the green light and the red light is filtered by the filter to filter out the blue peak, and then the red light and the green light are mixed with the red light and the green light through the scattering plate to form a single mixed color light;
    ⑵控制板基于红灯、绿灯、白灯原有的亮度、色度、色温进行电流比例调整达到调整混色光谱的目的。⑵The control board adjusts the current ratio based on the original brightness, chromaticity and color temperature of the red, green and white lights to achieve the purpose of adjusting the color mixing spectrum.
  9. 根据权利要求8所述改变色温的方法，其特征在于，调整各灯珠电流的方法包括，调整灯珠电流以改变当前灯珠的亮度、色度及色温，即，通过光学仪器获取当前灯珠当前电流下的亮度、色度及色温，在出厂前调整红、绿、白灯的电流大小来达到自适应地调整红、绿、白灯的亮度、色度、色温配比，实现目标混光的亮度、色度及色温。The method of changing the color temperature according to claim 8, wherein the method of adjusting the current of each lamp bead comprises adjusting the current of the lamp bead to change the brightness, chromaticity and color temperature of the current lamp bead, that is, obtaining the current lamp bead through an optical instrument The brightness, chromaticity and color temperature under the current current, adjust the current of the red, green and white lights before leaving the factory to achieve adaptive adjustment of the brightness, chromaticity and color temperature ratio of the red, green and white lights to achieve the target light mixing The brightness, chromaticity and color temperature.
  10. 根据权利要求8所述改变色温的方法，其特征在于，可预设多种混色后的目标亮度值、色度值及色温值，色温的计算公式为：The method for changing the color temperature according to claim 8, wherein the target brightness value, chromaticity value and color temperature value after multiple color mixing can be preset, and the color temperature calculation formula is:
    te＝(x-0.332)/(y-0.1858)te=(x-0.332)/(y-0.1858)
    ct＝5514.31-437*te*te*te+3601*te*te-6831*tect=5514.31-437*te*te*te+3601*te*te-6831*te
    式中，x、y分别代表色度值，ct代表当前色温值，te代表中间计算过程值；In the formula, x and y respectively represent the chromaticity value, ct represents the current color temperature value, and te represents the intermediate calculation process value;
    改变各单色灯的电流比例，将改变混色后的色度值，色度值的改变将改变混色后的色温；故能根据需要进行色温配置。Changing the current ratio of each monochromatic lamp will change the chromaticity value after color mixing, and the change of chromaticity value will change the color temperature after color mixing; therefore, the color temperature configuration can be carried out as needed.
PCT/CN2019/111480 2019-10-16 2019-10-16 Lamp source for improving color rendering index and method for changing color temperature WO2021072678A1 (en)

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