Light emitting device and light emitting system

Abstract

The present invention is applicable to the field of light source technology, and provides a light-emitting device and a light-emitting system, wherein the light-emitting device includes a driving circuit, a red light source, a green light source, a blue light source, a first color temperature white light source and a second color temperature white light source; the driving circuit is respectively connected to the red light source, the green light source, the blue light source, the first color temperature white light source and the second color temperature white light source to respectively adjust the luminous flux of each light source, and emits white light in a first color temperature range by matching the first color temperature white light source, the red light source and the green light source, so that the weight of the red light component emitted by the white light source during light emission can be reduced, thereby reducing the use of red phosphor and increasing the luminous flux of the white light in the first color temperature range, and by adjusting the luminous flux of the red light source and the green light source through the driving circuit, the color rendering index of the white light in the first color temperature range can be improved, so that the white light in the first color temperature range has a higher luminous flux and a higher color rendering index.

Description

Technical Field

[0001] The present invention belongs to the technical field of light sources, and in particular relates to a light emitting device and a light emitting system. Background Art

[0002] With the continuous development of light source technology, various types of light-emitting devices such as lighting light sources, decorative light sources, advertising light boxes, and alarm light sources have emerged in an endless stream, bringing great convenience to people's daily production and life. In different application scenarios, it is sometimes necessary to change the color temperature of the light-emitting device. Most existing light-emitting devices change the color temperature by adjusting the luminous flux. To achieve low color temperature, it is usually necessary to reduce the luminous flux, which easily leads to too low luminous flux. Summary of the invention

[0003] In view of this, the embodiments of the present invention provide a light emitting device and a light emitting system to solve the problem that to achieve a low color temperature, the luminous flux usually needs to be reduced, which easily leads to a problem that the luminous flux is too low.

[0004] A first aspect of an embodiment of the present invention provides a light emitting device, including a driving circuit, a red light source, a green light source, a blue light source, a first color temperature white light source, and a second color temperature white light source;

[0005] The driving circuit is respectively connected to the red light source, the green light source, the blue light source, the first color temperature white light source and the second color temperature white light source to adjust the luminous flux of each light source respectively;

[0006] When the first color temperature white light source, the red light source, and the green light source are turned on and the second color temperature white light source and the blue light source are turned off, the light emitting device emits white light in the first color temperature range;

[0007] When the first color temperature white light source, the second color temperature white light source and the green light source are turned on and the red light source and the blue light source are turned off, the light emitting device emits white light in the second color temperature range;

[0008] When the second color temperature white light source and the blue light source are turned on and the first color temperature white light source, the red light source and the green light source are turned off, the light emitting device emits white light in the third color temperature range;

[0009] When the red light source, the green light source and the blue light source are turned on and the first color temperature white light source and the second color temperature white light source are turned off, the light emitting device emits light of at least one color.

[0010] In one embodiment, the driving circuit includes a human-computer interaction circuit and a control circuit;

[0011] The human-machine interaction circuit is connected with the control circuit;

[0012] The human-computer interaction circuit is used to receive a control signal sent by a user, and trigger the control circuit to adjust the luminous flux of each light source respectively according to the control signal.

[0013] In one embodiment, the human-computer interaction circuit includes a radio frequency receiving module;

[0014] The radio frequency receiving module is electrically connected to the control circuit to receive a wireless control signal sent by a user through a wireless control device, and triggers the control circuit to adjust the luminous flux of each light source respectively according to the wireless control signal.

[0015] In one embodiment, the driving circuit includes a rectifier circuit, the rectifier circuit includes a transient suppression diode and a rectifier bridge composed of four diodes;

[0016] The first input end of the rectifier bridge is connected to the cathode of the transient suppression diode and the first end of the power supply respectively, and the second input end of the rectifier bridge is connected to the anode of the transient suppression diode and the second end of the power supply respectively;

[0017] The rectifier circuit is used to connect to the power supply, rectify the alternating current of the power supply and output direct current.

[0018] In one embodiment, the driving circuit includes a filter circuit, and the filter circuit includes a first inductor, a first resistor, a second resistor, a first diode, a second diode, a first non-polar capacitor, a first polar capacitor, and a second polar capacitor;

[0019] The filter circuit is respectively connected with the rectifier circuit, the control circuit and each light source;

[0020] The first end of the first inductor is respectively connected to the rectifier circuit, the first end of the first resistor and the first end of the first non-polar capacitor, the second end of the first inductor is respectively connected to the second end of the first resistor and the positive electrode of the first diode, the negative electrode of the first diode is respectively connected to the first end of the second resistor and the negative electrode of the second diode, the second end of the second resistor is respectively connected to the positive electrode of the second diode and the positive electrode of the first polar capacitor, the negative electrode of the first polar capacitor is connected to the second end of the first non-polar capacitor, the positive electrode of the second polar capacitor is connected to the negative electrode of the first diode, the negative electrode of the second diode, the first end of the second resistor and each light source, and the negative electrode of the second polar capacitor is connected to the control circuit.

[0021] The filter circuit is used to obtain the direct current output by the rectifier circuit and filter it, and to power any light source when any light source is turned on.

[0022] In one embodiment, the driving circuit includes a first power supply circuit, and the first power supply circuit includes a third diode, a fourth diode, a fifth diode, a second non-polar capacitor, a third polar capacitor, a fourth polar capacitor, a first step-down chip, a voltage regulator diode, a third resistor, a fourth resistor, a fifth resistor, a field effect transistor, a second inductor and a third non-polar capacitor;

[0023] The first power supply circuit is connected to the control circuit and the filter circuit respectively;

[0024] The positive electrode of the third diode is connected to the negative electrode of the first diode, and the negative electrode of the third diode is respectively connected to the second end of the first inductor, the drain of the first buck chip and the positive electrode of the third polar capacitor, the power supply end of the first buck chip is respectively connected to the output end of the first buck chip, the positive electrode of the voltage regulator diode, the second end of the fifth resistor, the gate of the field effect tube and the first end of the second non-polar capacitor, the current sampling end of the first buck chip is connected to the first end of the third resistor, the negative electrode of the voltage regulator diode is connected to the negative electrode of the fifth diode, the positive electrode of the fifth diode is respectively connected to the control circuit, the first end of the fourth resistor, the positive electrode of the fourth polar capacitor, the second end of the second inductor and the first end of the third non-polar capacitor, the first end of the second inductor is respectively connected to the second end of the second non-polar capacitor, the second end of the third resistor and the negative electrode of the fourth diode, the positive electrode of the fourth diode is respectively connected to the second end of the fourth resistor, the negative electrode of the fourth polar capacitor and the drain of the field effect tube, and the source of the field effect tube is respectively connected to the first end of the fifth resistor and the negative electrode of the third polar capacitor;

[0025] The first power supply circuit is used to obtain the direct current filtered by the filter circuit and step down the voltage, and to supply power to the control circuit.

[0026] In one embodiment, the driving circuit includes a second power supply circuit, and the second power supply circuit includes a second buck chip, a third buck chip, a fourth non-polar capacitor, a fifth non-polar capacitor, a fourth polar capacitor, a sixth diode, a seventh diode, a third inductor, a sixth resistor, a seventh resistor and an eighth resistor;

[0027] The second power supply circuit is connected to the human-machine interaction circuit and the filter circuit respectively;

[0028] The drain of the second buck chip is connected to the second end of the first inductor, the power supply end of the second buck chip is respectively connected to the negative electrode of the sixth diode and the first end of the fourth non-polar capacitor, the current sampling end of the second buck chip is respectively connected to the first end of the sixth resistor and the first end of the seventh resistor, the second end of the sixth resistor is respectively connected to the second end of the seventh resistor, the negative electrode of the seventh diode and the output end of the second buck chip, the output end of the second buck chip is respectively connected to the second end of the fourth non-polar capacitor and the first end of the third inductor, the second end of the third inductor is respectively connected to the positive electrode of the sixth diode, the first end of the eighth resistor, the positive electrode of the fourth polar capacitor and the input end of the third buck chip, the output end of the third buck chip is respectively connected to the first end of the fifth non-polar capacitor and the human-computer interaction circuit, and the second end of the fifth non-polar capacitor is respectively connected to the positive electrode of the seventh diode, the second end of the eighth resistor and the negative electrode of the fourth polar capacitor.

[0029] The second power supply circuit is used to obtain the direct current filtered by the filter circuit and step down the voltage, and to supply power to the human-computer interaction circuit.

[0030] In one embodiment, the first color temperature range is less than or equal to the first color temperature, the second color temperature range is greater than the first color temperature and less than the second color temperature, and the third color temperature range is greater than or equal to the second color temperature.

[0031] In one embodiment, the first color temperature ranges from 2200K to 4000K, and the second color temperature ranges from 4000K to 10000K.

[0032] A second aspect of the embodiments of the present invention provides a lighting system, comprising a wireless control device and the lighting apparatus provided by the first aspect of the embodiments of the present invention.

[0033] A first aspect of an embodiment of the present invention provides a light-emitting device, including a driving circuit, a red light source, a green light source, a blue light source, a first color temperature white light source and a second color temperature white light source; the driving circuit is respectively connected to the red light source, the green light source, the blue light source, the first color temperature white light source and the second color temperature white light source to adjust the luminous flux of each light source respectively, and emits white light in a first color temperature range by combining the first color temperature white light source, the red light source and the green light source, which can reduce the weight of the red light source among the three light sources when emitting light, thereby reducing the use of red phosphor and increasing the luminous flux of the white light in the first color temperature range, and by adjusting the luminous flux of the red light source and the green light source through the driving circuit, the color rendering index of the white light in the first color temperature range can be improved, so that the white light in the first color temperature range has a higher luminous flux and a higher color rendering index.

[0034] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 is a schematic diagram of a first structure of a light emitting device provided by an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of the chromaticity of white light with a color temperature of 2000K obtained by mixing white light with a first color temperature, green light and red light when the first color temperature provided by an embodiment of the present invention is 2700K;

[0038] Figure 3 is a schematic diagram of the spectrum of red light, green light and blue light provided by an embodiment of the present invention;

[0039] Figure 4 1 is a schematic diagram of the spectrum of white light with a color temperature of 2700K and white light with a color temperature of 7000K provided in an embodiment of the present invention;

[0040] Figure 5 is a schematic diagram of a spectrum of white light with a color temperature of 2000K obtained by mixing white light with a first color temperature, green light and red light when the first color temperature provided by an embodiment of the present invention is 2700K;

[0041] Figure 6 is a schematic diagram of a first structure of a driving circuit provided by an embodiment of the present invention;

[0042] Figure 7 is a second structural schematic diagram of a driving circuit provided by an embodiment of the present invention;

[0043] Figure 8 is a third structural schematic diagram of a driving circuit provided by an embodiment of the present invention;

[0044] Fig. 9 is a fourth structural schematic diagram of a driving circuit provided by an embodiment of the present invention;

[0045] Fig.10 is a fifth structural schematic diagram of a driving circuit provided by an embodiment of the present invention;

[0046] Fig.11 is a schematic diagram of a first structure of a light emitting system provided by an embodiment of the present invention; DETAILED DESCRIPTION

[0047] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0048] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0049] It should also be understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0050] As used in the present specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]", depending on the context.

[0051] In addition, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0052] References to "one embodiment" or "some embodiments" etc. described in the present specification mean that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0053] In applications, the prior art usually uses a red light source, a green light source, and a blue light source to mix to obtain white light. When a white light source with a low color temperature needs to be produced, such as a white light source with a color temperature of 2000K, in order to ensure the color rendering index of the white light with a low color temperature, the red light source needs to use more red phosphors. However, the excitation efficiency of the red phosphors is low, which easily leads to low luminous flux of the white light with a low color temperature. If the prior art is used to ensure that the white light with a low color temperature has a high color rendering index and a high luminous flux, more red phosphors need to be used, resulting in excessively high production costs.

[0054] like Figure 1 As shown, an embodiment of the present invention provides a light emitting device 1, including a driving circuit 10, a red light source 20, a green light source 30, a blue light source 40, a first color temperature white light source 50 and a second color temperature white light source 60;

[0055] The driving circuit 10 is respectively connected to the red light source 20, the green light source 30, the blue light source 40, the first color temperature white light source 50 and the second color temperature white light source 60 to adjust the luminous flux of each light source respectively;

[0056] When the first color temperature white light source 50, the red light source 20 and the green light source 30 are turned on and the second color temperature white light source 60 and the blue light source 40 are turned off, the light emitting device 1 emits white light in the first color temperature range;

[0057] When the first color temperature white light source 50, the second color temperature white light source 60 and the green light source 30 are turned on and the red light source 20 and the blue light source 40 are turned off, the light emitting device 1 emits white light in the second color temperature range;

[0058] When the second color temperature white light source 60 and the blue light source 40 are turned on and the first color temperature white light source 50, the red light source 20 and the green light source 30 are turned off, the light emitting device 1 emits white light in the third color temperature range;

[0059] When the red light source 20 , the green light source 30 , and the blue light source 40 are turned on and the first color temperature white light source 50 and the second color temperature white light source 60 are turned off, the light emitting device 1 emits light of at least one color.

[0060] In applications, the light-emitting device can be a lighting device, a decorative device, an advertising light source box, an alarm device, etc. Each light source can be realized by a light-emitting diode (LED), wherein the white light source is realized by a blue LED chip and a yellow phosphor covering the blue LED chip, or by a blue LED chip and a yellow phosphor and a red phosphor covering the blue LED chip, or by a blue LED chip and a red phosphor and a green phosphor covering the blue LED chip, or by an ultraviolet LED chip and an RGB phosphor (i.e., red phosphor, green phosphor, and blue phosphor) covering the ultraviolet LED chip; the red light source is realized by a blue LED chip and a red phosphor covering the blue LED chip, or by a red LED chip; the green light source is realized by a blue LED chip and a green phosphor covering the blue LED chip, or by a green LED chip; the blue light source is realized by a blue LED chip, or by a purple LED chip and a blue phosphor covering the purple LED chip. The yellow phosphor may be yttrium aluminum garnet phosphor, silicate phosphor, nitride phosphor, the red phosphor may be potassium fluorosilicate (KSF) phosphor, aluminate red phosphor, the green phosphor may be aluminate green phosphor, and the blue phosphor may be europium doped blue phosphor. The driving circuit may adjust the luminous flux of each light source by controlling the current output to each light source.

[0061] In application, when the first color temperature white light source, the red light source and the green light source are turned on and the second color temperature white light source and the blue light source are turned off, the luminous flux of any one of the first color temperature white light source, the red light source and the green light source, or any two of the light sources, or the three light sources is adjusted by the driving circuit, so that the color temperature of the white light emitted by the light-emitting device can be adjusted within the first color temperature range; when the light-emitting device emits white light in the first color temperature range, the luminous flux of any one of the red light source and the green light source or the two light sources is adjusted by the driving circuit, so that the color coordinates of the white light in the first color temperature range can fall near the black body locus, thereby improving the color rendering index of the white light in the first color temperature range; by emitting white light in the first color temperature range through the combination of the first color temperature white light source, the red light source and the green light source, the weight of the red light component emitted by the white light source during emission can be reduced, thereby reducing the amount of red phosphor used and increasing the luminous flux of the white light in the first color temperature range, so as to achieve a higher color rendering index and a higher luminous flux of the white light in the first color temperature range.

[0062] In application, when the first color temperature white light source, the second color temperature white light source and the green light source are turned on and the red light source and the blue light source are turned off, the luminous flux of any one or both of the first color temperature white light source and the second color temperature white light source is adjusted by the driving circuit, so that the color temperature of the white light emitted by the light-emitting device can be adjusted within the second color temperature range; when the light-emitting device emits white light in the second color temperature range, the luminous flux of the green light source is adjusted by the driving circuit, and when the color tolerance of the white light in the second color temperature range exceeds 5SDCM (Standard Deviation of ColoeMatching, standard color matching deviation), compensation can be performed to control the color tolerance of the white light in the second color temperature range to be less than 5SDCM.

[0063] In application, when the second color temperature white light source and the blue light source are turned on and the first color temperature white light source, the red light source and the green light source are turned off, the color temperature of the light-emitting device can be improved by adjusting the luminous flux of any one or both of the second color temperature white light source and the blue light source through the driving circuit, so that the color temperature of the white light emitted by the light-emitting device can be adjusted within the third color temperature range. At the same time, by adjusting the luminous flux of the blue light source, the color rendering index of the white light in the third color temperature range can be improved.

[0064] In application, when the red light source, the green light source and the blue light source are turned on and the first color temperature white light source and the second color temperature white light source are turned off, the light-emitting device can emit complex light that is a mixture of red light, green light and blue light. The complex light can be light of one color or light of multiple colors. By adjusting the luminous flux of any one, any two or three of the red, green and blue light sources through the driving circuit, the color type and number of colors of the complex light can be controlled.

[0065] In one embodiment, the first color temperature range is less than or equal to the first color temperature, the second color temperature range is greater than the first color temperature and less than the second color temperature, and the third color temperature range is greater than or equal to the second color temperature.

[0066] In an application, the first color temperature range, the second color temperature range, and the third color temperature range are determined according to the magnitude of the first color temperature and the second color temperature.

[0067] In one embodiment, the first color temperature ranges from 2200K to 4000K, and the second color temperature ranges from 4000K to 10000K.

[0068] In application, the first color temperature white light source can be a white light source with a lower color temperature, and the value range of the first color temperature can be 2200K to 4000K, specifically, it can be a white light source with a color temperature of 2700K or a white light source with a color temperature of 3000K; the second color temperature white light source can be a white light source with a higher color temperature, and the value range of the second color temperature can be 4000K to 10000K, specifically, it can be a white light source with a color temperature of 7000K. The specific color temperature of the first color temperature and the second color temperature can be set according to actual needs.

[0069] In application, through the combination of a red light source, a green light source, a blue light source, a first color temperature white light source and a second color temperature white light source, white light of multiple color temperature ranges can be emitted in a light-emitting device to improve the versatility of the light-emitting device; the white light of the first color temperature range emitted by the light-emitting device has a higher color rendering index and a higher luminous flux, and does not need to use too much red phosphor and improves the performance of the light-emitting device in emitting low color temperature white light.

[0070] Figure 2 The chromaticity diagram of white light with a color temperature of 2000K obtained by mixing white light with a first color temperature, green light and red light when the first color temperature is 2700K is exemplarily shown.

[0071] Figure 3 Spectral diagrams of red light, green light and blue light are shown by way of example, wherein the abscissa of the spectral diagram represents the wavelength in nanometers, and the ordinate of the spectral diagram represents the absorbance.

[0072] Figure 4 The schematic diagram of the spectrum of white light with a color temperature of 2700K and white light with a color temperature of 7000K is shown by way of example.

[0073] Figure 5 The schematic diagram of the spectrum of white light with a color temperature of 2000K obtained by mixing white light with a first color temperature, green light and red light when the first color temperature is 2700K is exemplarily shown.

[0074] like Figure 6 As shown, in one embodiment, the driving circuit 10 includes a human-computer interaction circuit 11 and a control circuit 12;

[0075] The human-computer interaction circuit 11 is connected to the control circuit 12;

[0076] The human-computer interaction circuit 11 is used to receive a control signal sent by a user, and trigger the control circuit 12 to adjust the luminous flux of each light source according to the control signal.

[0077] In application, the human-computer interaction circuit may include a button and / or a wireless receiving module, etc.; wherein the button is connected to the control circuit to receive a control signal input by the user through a pressing operation, and triggers the control circuit to drive each white light source and each color light source to turn on, turn off or change the luminous flux according to the control signal; the wireless receiving module is electrically connected to the control circuit to receive a wireless control signal sent by the user through a wireless control device, and triggers the control circuit to adjust the luminous flux of each white light source and each color light source according to the wireless control signal.

[0078] In one embodiment, the human-computer interaction circuit includes a radio frequency receiving module;

[0079] The radio frequency receiving module is electrically connected to the control circuit to receive a wireless control signal sent by a user through a wireless control device, and triggers the control circuit to adjust the luminous flux of each light source respectively according to the wireless control signal.

[0080] In the application, the wireless receiving module may include a radio frequency receiving module and / or a photoelectric conversion module, etc.; wherein the radio frequency receiving module may include at least one of a Bluetooth module, a WiFi module, a ZigBee module, a mobile communication module and a data transmission radio module, etc., for converting the radio frequency signal sent by the user through a user terminal such as a mobile phone, a tablet computer, a smart bracelet, a personal digital assistant based on radio frequency technology into an electrical signal, and triggering the control circuit according to the electrical signal to drive each white light source and each color light source to turn on, turn off or change the luminous flux; the photoelectric conversion module may include a photodiode or a phototransistor, for converting the white light signal sent by the user through a visible light control device, an infrared control device (for example, a remote control) based on optical communication technology into an electrical signal, and triggering the control circuit according to the electrical signal to adjust the luminous flux of each white light source and each color light source.

[0081] In application, the driving circuit may also include a rectifier circuit, a filter circuit, a power supply circuit, etc., wherein the rectifier circuit is used to access a power supply (for example, AC power), rectify the power supply and output it to the filter circuit; the filter circuit is connected to the rectifier circuit, and is used to filter the rectified power supply and output it to each light source and power supply circuit respectively; the power supply circuit is connected to the filter circuit, and is used to stabilize and reduce the voltage of the filtered external power supply and output it to the control circuit and the human-computer interaction circuit, thereby powering the control circuit and the human-computer exchange circuit.

[0082] like Figure 7 As shown, in one embodiment, the driving circuit 10 includes a rectifier circuit 13, and the rectifier circuit 13 includes a transient suppression diode 131 and a rectifier bridge 132 composed of four diodes;

[0083] The first input end of the rectifier bridge 132 is respectively connected to the cathode of the transient suppression diode 131 and the first end of the power supply 133, and the second input end of the rectifier bridge 132 is respectively connected to the anode of the transient suppression diode 131 and the second end of the power supply 133;

[0084] The rectifier circuit 13 is used to connect to the power source 133 and rectify the alternating current of the power source 133 to output direct current.

[0085] In application, the grounding terminal of the rectifier bridge is grounded. The rectifier bridge is used to rectify the sine wave AC input by the power supply and output DC without negative half-cycle. Specifically, when the frequency of the AC input by the power supply is 50Hz, the frequency of the DC output by the rectifier bridge is 100Hz, and when the frequency of the AC input by the power supply is 60Hz, the frequency of the DC output by the rectifier bridge is 120Hz, wherein the power supply can be AC ​​power. When the voltage of the first end of the power supply and the second end of the power supply does not exceed the breakdown voltage of the transient suppression diode, the transient suppression diode does not work and is in a high-resistance state; when the voltage of the first end of the power supply and the second end of the power supply exceeds the breakdown voltage of the transient suppression diode, the transient suppression diode is reversely broken down and changes from a high-resistance state to a low-resistance state, and an excessive voltage can be introduced from the first end of the power supply to the second end of the power supply to protect the light-emitting device. Specifically, when the power supply is AC power, the first end of the power supply is the live wire, and the second end of the power supply is the neutral wire, and the excessive voltage can be derived from the ground wire connected to the neutral wire.

[0086] In one embodiment, the rectifier circuit 13 further includes a fuse 134;

[0087] The fuse 134 is connected between the first terminal of the power source 133 and the first input terminal of the rectifier bridge 132;

[0088] The fuse 134 is used to disconnect the power source 133 from the rectifier bridge 132 when the current flowing through the fuse 134 exceeds a preset threshold value, so as to protect the rectifier circuit.

[0089] In the application, fuses and transient suppression diodes are used to achieve double insurance for the rectifier circuit, avoiding excessive voltage from damaging the rectifier circuit, improving the pressure resistance of the light-emitting device, and reducing the risk of electricity use.

[0090] like Figure 8 As shown, in one embodiment, the driving circuit 10 includes a filter circuit 14, and the filter circuit 14 includes a first inductor 141, a first resistor 142, a second resistor 143, a first diode 144, a second diode 145, a first non-polar capacitor 146, a first polar capacitor 147 and a second polar capacitor 148;

[0091] The filter circuit 14 is connected to the rectifier circuit 13, the control circuit 12 and each light source 70 respectively;

[0092] The first end of the first inductor 141 is respectively connected to the rectifier circuit 13, the first end of the first resistor 142 and the first end of the first non-polar capacitor 146, the second end of the first inductor 141 is respectively connected to the second end of the first resistor 142 and the positive electrode of the first diode 144, the negative electrode of the first diode 144 is respectively connected to the first end of the second resistor 143 and the negative electrode of the second diode 145, the second end of the second resistor 143 is respectively connected to the positive electrode of the second diode 145 and the positive electrode of the first polar capacitor 147, the negative electrode of the first polar capacitor 147 is connected to the second end of the first non-polar capacitor 146, the positive electrode of the second polar capacitor 148 is connected to the negative electrode of the first diode 144, the negative electrode of the second diode 145, the first end of the second resistor 143 and each light source 70, and the negative electrode of the second polar capacitor 148 is connected to the control circuit 12;

[0093] The filter circuit 14 is used to obtain the direct current output by the rectifier circuit 13 and filter it, and to supply power to any light source 70 when any light source 70 is turned on.

[0094] In application, the second end of the first non-polar capacitor and the negative electrode of the first polar capacitor are grounded. The filter circuit is used to filter out the AC pulsating component in the DC power output by the rectifier circuit, thereby obtaining the first DC power, and the first DC power has a smooth DC voltage and DC current. The first DC power can be used to power any light source when any light source is turned on, and can also be used to power the device, circuit or chip of the driving circuit. The first DC power can be output from the negative electrode of the second diode. The filter circuit can also include a transformer for adjusting the voltage of the DC power output by the rectifier circuit.

[0095] In one embodiment, the filter circuit 14 includes a sub-filter circuit, and the sub-filter circuit includes a first inductor 141 and a first resistor 142;

[0096] The sub-filter circuit is used to obtain the direct current output by the rectifier circuit 13 and filter it, and output a second direct current to power the devices, circuits or chips of the drive circuit 10 .

[0097] In application, the sub-filter circuit can output a first direct current from the second end of the first inductor, which can be used to power a USB (Universal Serial Bus) bus, thereby powering devices, circuits or chips connected to the USB bus.

[0098] like Fig. 9 As shown, in one embodiment, the driving circuit 10 includes a first power supply circuit 15, and the first power supply circuit 15 includes a third diode 151, a fourth diode 152, a fifth diode 153, a second non-polar capacitor 154, a third polar capacitor 155, a fourth polar capacitor 156, a first buck chip 157, a voltage regulator diode 158, a third resistor 159, a fourth resistor 160, a fifth resistor 161, a field effect transistor 162, a second inductor 163 and a third non-polar capacitor 164;

[0099] The first power supply circuit 15 is connected to the control circuit 12 and the filter circuit 14 respectively;

[0100] The anode of the third diode 151 is connected to the cathode of the first diode 144, the cathode of the third diode 151 is respectively connected to the second end of the first inductor 141, the drain DRAIN of the first buck chip 157 and the anode of the third polar capacitor 155, the power supply terminal VCC (Volt Current Condenser, power supply voltage) of the first buck chip 157 is respectively connected to the output terminal SEL of the first buck chip 157, the anode of the voltage stabilizing diode 158, the second end of the fifth resistor 161, the gate of the field effect transistor 162 and the first end of the second non-polar capacitor 154, the current sampling terminal CS (Current Sampling) of the first buck chip 157 is connected to the first end of the third resistor 159, the cathode of the voltage stabilizing diode 158 is connected to the cathode of the fifth diode 153, the anode of the fifth diode 153 is respectively connected to the control circuit 12 and the first end of the fourth resistor 160. The first end of the second inductor 163 is connected to the second end of the second non-polar capacitor 154, the second end of the third resistor 159 and the cathode of the fourth diode 152, the anode of the fourth diode 152 is connected to the second end of the fourth resistor 160, the drain of the field effect transistor 162 and the cathode of the fourth polar capacitor 156, and the source of the field effect transistor 162 is connected to the first end of the fifth resistor 161 and the cathode of the third polar capacitor 155;

[0101] The first power supply circuit 15 is used to obtain the DC power filtered by the filter circuit 14 and step down the voltage thereof, and to supply power to the control circuit 12 .

[0102] In the application, the first buck chip also includes a ground terminal GND, and the ground terminal GND of the first buck chip is respectively connected to the second end of the second non-polar capacitor, the first end of the second inductor, the cathode of the fourth diode and the second end of the third resistor; the second end of the third polar capacitor, the first end of the fifth resistor and the source of the field effect tube are grounded. The anode of the third diode is connected to the cathode of the first diode of the filter circuit and is used to obtain the second direct current output by the filter circuit. The first power supply circuit is used to obtain the first direct current and the second direct current and perform voltage stabilization and voltage reduction. The third direct current can be output by the anode of the fifth diode to power the control circuit. The first buck chip can select any chip that can realize its function according to the power supply voltage required by the control circuit, for example, the BP2522 chip. When the BP2522 chip is selected and its output end is connected to its power supply end, the voltage of the third direct current output by the first power supply circuit is 14V.

[0103] In application, the third non-polar capacitor is used to quickly discharge the excess voltage at the connection between the first power supply circuit and the control circuit when the first power supply circuit stops supplying power to the control circuit, so that the control circuit stops working quickly and avoids the excess voltage from being unable to be consumed in the circuit and damaging components. The field effect transistor can be a junction field effect transistor (Junction Field Effect Transistor, JFET) or a metal oxide semiconductor field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET), specifically, it can be an N-channel enhancement MOSFET.

[0104] like Fig.10 As shown, in one embodiment, the driving circuit 10 includes a second power supply circuit 17, and the second power supply circuit 17 includes a second buck chip 171, a third buck chip 172, a fourth non-polar capacitor 173, a fifth non-polar capacitor 174, a fifth polar capacitor 175, a sixth diode 176, a seventh diode 177, a third inductor 178, a sixth resistor 179, a seventh resistor 180 and an eighth resistor 181;

[0105] The second power supply circuit 17 is connected to the human-machine interaction circuit 11 and the filter circuit 14 respectively;

[0106] The drain electrode DRAIN of the second buck chip 171 is connected to the second end of the first inductor 141, the power supply terminal VCC of the second buck chip 171 is respectively connected to the cathode of the sixth diode 176 and the first end of the fourth non-polar capacitor 173, the current sampling terminal CS of the second buck chip 171 is respectively connected to the first end of the sixth resistor 179 and the first end of the seventh resistor 180, the second end of the sixth resistor 179 is respectively connected to the second end of the seventh resistor 180, the cathode of the seventh diode 177 and the output terminal SEL of the second buck chip 171, and the output terminal SEL of the second buck chip 171 is respectively connected to the The second end of the fourth non-polar capacitor 173 is connected to the first end of the third inductor 178, the second end of the third inductor 178 is respectively connected to the anode of the sixth diode 176, the first end of the eighth resistor 181, the anode of the fifth polar capacitor 175 and the input end VIN of the third buck chip 172, the output end VOUT of the third buck chip 172 is respectively connected to the first end of the fifth non-polar capacitor 174 and the power supply end of the human-computer interaction circuit 11, the second end of the fifth non-polar capacitor 174 is respectively connected to the anode of the seventh diode 177, the second end of the eighth resistor 181 and the negative electrode of the fifth polar capacitor 175;

[0107] The second power supply circuit 17 is used to obtain the DC power filtered by the filter circuit 14 and step down the voltage thereof, and to supply power to the human-machine interaction circuit 11 .

[0108] In application, the second buck chip also includes a ground terminal GND, and the ground terminal GND of the second buck chip is respectively connected to the output terminal SEL of the second buck chip, the second end of the sixth resistor, the second end of the seventh resistor, the cathode of the seventh diode, the second end of the fourth non-polar capacitor and the first end of the third inductor; the third buck chip also includes a ground terminal GND, and the ground terminal GND of the third buck chip is respectively connected to the second end of the fifth non-polar capacitor, the anode of the seventh diode, the second end of the eighth resistor and the cathode of the fifth polar capacitor.

[0109] In the application, the second power supply circuit includes a first sub-buck circuit and a second sub-buck circuit, wherein the first sub-buck circuit includes a second buck chip, a fourth non-polar capacitor, a fifth polar capacitor, a sixth diode, a seventh diode, a third inductor, a sixth resistor, a seventh resistor and an eighth resistor, and the second sub-buck circuit includes a third buck chip and a fifth non-polar capacitor. The drain DRAIN of the second buck chip is connected to the negative electrode of the first diode of the filter circuit and is used to obtain the first direct current output by the filter circuit, the first sub-buck circuit is used to obtain the first direct current and perform voltage stabilization and voltage reduction, and the fourth direct current after voltage reduction can be output from the second end of the third inductor. The fourth direct current after voltage reduction of the first sub-buck circuit can be input to the input terminal VIN of the third buck chip, the second sub-buck circuit is used to obtain the fourth direct current and perform voltage reduction, and the fifth direct current after voltage reduction can be output from the output terminal VOUT of the third buck chip, and the voltage of the fifth direct current can be 3.3V. The second buck chip and the third buck chip can select any chip that can realize their functions according to the power supply voltage required by the human-computer interaction circuit. For example, the second buck chip can be a BP2525F chip. When the BP2525F chip is selected and its output end is connected to its ground end, the voltage of the fourth direct current output by the first sub-buck circuit is 5V.

[0110] like Fig.10 As shown, in one embodiment, the first output terminal OUT1 of the control circuit 12 is connected to the blue light source 40, the second output terminal OUT2 is connected to the red light source 20, the third output terminal OUT3 is connected to the green light source 30, the fourth output terminal OUT4 is connected to the first color temperature white light source 50, the fifth output terminal OUT5 is connected to the second color temperature white light source 60, the power supply terminal VCC is connected to the first power supply circuit 15, and the SDA (Serial Data) pin and the SCL (Serial Clock) pin are connected to the human-machine exchange circuit 11;

[0111] The power supply terminal VCC of the human-machine interaction circuit 11 is connected to the second power supply circuit 17 , the SDA pin is connected to the SDA pin of the control circuit 12 , and the SCL pin is connected to the SCL pin of the control circuit 12 .

[0112] In the application, OUT1 of the control circuit is used to adjust the luminous flux of the blue light source, VCC is used to obtain the power supply voltage to power the control circuit, the SDA pin and the SCL pin are used to communicate with the human-computer interaction circuit, OUT2 is used to adjust the luminous flux of the red light source, OUT3 is used to adjust the luminous flux of the green light source, OUT4 is used to adjust the luminous flux of the first color temperature white light source, and OUT5 is used to adjust the luminous flux of the second color temperature white light source. The control circuit can select any device, circuit or chip that can realize its function according to actual needs, for example, the BP1658C chip.

[0113] In the application, the human-machine exchange circuit may include a radio frequency receiving module, which may be a WiFi module, wherein the SDA pin and the SCL pin may form an I2C (InterIntegrated Circuit) bus to perform two-way data transmission and communication with the control circuit, and may transmit a wireless control signal to the control circuit through a serial data line, and may also receive a feedback signal sent by the control circuit, and send a feedback signal to a wireless control device, which may be used to inform the user of the execution of the wireless control signal by the light-emitting device, and the timing logic of the radio frequency receiving module and the control circuit may be determined through a serial clock line. The embodiment of the present invention does not impose any restrictions on the type and quantity of the communication modules included in the radio frequency receiving module.

[0114] The light-emitting device provided by the embodiment of the present invention includes a driving circuit, a red light source, a green light source, a blue light source, a first color temperature white light source and a second color temperature white light source; the driving circuit is respectively connected to the red light source, the green light source, the blue light source, the first color temperature white light source and the second color temperature white light source to adjust the luminous flux of each light source respectively, and emits white light in a first color temperature range by matching the first color temperature white light source, the red light source and the green light source, which can reduce the weight of the red light component emitted by the white light source when emitting light, thereby reducing the use of red phosphor and increasing the luminous flux of the white light in the first color temperature range, and adjusting the luminous flux of the red light source and the green light source by the driving circuit, so that the color coordinates of the white light in the first color temperature range can be adjusted to fall near the blackbody locus, thereby improving the color rendering index of the white light in the first color temperature range, and achieving a higher luminous flux and a higher color rendering index for the white light in the first color temperature range.

[0115] like Fig.11 As shown, a lighting system 2 provided in an embodiment of the present invention includes a wireless control device 3 and the lighting device 1 provided in the above embodiment.

[0116] In application, the function of the lighting system is the same as that of the lighting device in the above embodiment, and will not be described in detail here.

[0117] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The functional modules in the embodiment can be integrated into a processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional modules. In addition, the specific names of the functional modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention. The specific working process of the modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0118] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0119] In the embodiments provided by the present invention, it should be understood that the disclosed terminal device and method can be implemented in other ways. For example, the terminal device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0120] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A light emitting device, characterized in that: It includes a driving circuit, a red light source, a green light source, a blue light source, a first color temperature white light source and a second color temperature white light source; The driving circuit is respectively connected to the red light source, the green light source, the blue light source, the first color temperature white light source and the second color temperature white light source to adjust the luminous flux of each light source respectively; When the first color temperature white light source, the red light source and the green light source are turned on and the second color temperature white light source and the blue light source are turned off, the light emitting device emits white light in the first color temperature range; When the first color temperature white light source, the second color temperature white light source and the green light source are turned on and the red light source and the blue light source are turned off, the light emitting device emits white light in the second color temperature range; when the light emitting device emits white light in the second color temperature range, the luminous flux of the green light source is adjusted by the driving circuit, and when the color tolerance of the white light in the second color temperature range exceeds 5SDCM, compensation is performed to control the color tolerance of the white light in the second color temperature range to be less than 5SDCM; When the second color temperature white light source and the blue light source are turned on and the first color temperature white light source, the red light source and the green light source are turned off, the light emitting device emits white light in a third color temperature range; When the red light source, the green light source and the blue light source are turned on and the first color temperature white light source and the second color temperature white light source are turned off, the light emitting device emits light of at least one color; The driving circuit includes a filter circuit, and the filter circuit includes a first inductor, a first resistor, a second resistor, a first diode, a second diode, a first non-polar capacitor, a first polar capacitor, and a second polar capacitor; The filter circuit is respectively connected to the rectifier circuit, the control circuit and each light source; The first end of the first inductor is respectively connected to the rectifier circuit, the first end of the first resistor and the first end of the first non-polar capacitor, the second end of the first inductor is respectively connected to the second end of the first resistor and the positive electrode of the first diode, the negative electrode of the first diode is respectively connected to the first end of the second resistor and the negative electrode of the second diode, the second end of the second resistor is respectively connected to the positive electrode of the second diode and the positive electrode of the first polar capacitor, the negative electrode of the first polar capacitor is connected to the second end of the first non-polar capacitor, the positive electrode of the second polar capacitor is connected to the negative electrode of the first diode, the negative electrode of the second diode, the first end of the second resistor and each of the light sources, and the negative electrode of the second polar capacitor is connected to the control circuit; The filtering circuit is used to obtain the direct current output by the rectifying circuit and filter it, and to supply power to any one of the light sources when any one of the light sources is turned on.

2. The light emitting device according to claim 1, characterized in that: The driving circuit includes a human-computer interaction circuit and a control circuit; The human-computer interaction circuit is connected to the control circuit; The human-computer interaction circuit is used to receive a control signal sent by a user, and trigger the control circuit to adjust the luminous flux of each light source respectively according to the control signal.

3. The light emitting device according to claim 2, characterized in that: The human-computer interaction circuit includes a radio frequency receiving module; The radio frequency receiving module is electrically connected to the control circuit to receive a wireless control signal sent by a user through a wireless control device, and triggers the control circuit to adjust the luminous flux of each light source respectively according to the wireless control signal.

4. The light emitting device according to claim 1, characterized in that: The driving circuit includes a rectifier circuit, and the rectifier circuit includes a transient suppression diode and a rectifier bridge composed of four diodes; The first input end of the rectifier bridge is connected to the cathode of the transient suppression diode and the first end of the power supply respectively, and the second input end of the rectifier bridge is connected to the anode of the transient suppression diode and the second end of the power supply respectively; The rectifier circuit is used to connect to the power supply, rectify the alternating current of the power supply and then output direct current.

5. The light emitting device according to claim 1, characterized in that: The driving circuit includes a first power supply circuit, which includes a third diode, a fourth diode, a fifth diode, a second non-polar capacitor, a third polar capacitor, a fourth polar capacitor, a first step-down chip, a voltage regulator diode, a third resistor, a fourth resistor, a fifth resistor, a field effect transistor, a second inductor and a third non-polar capacitor; The first power supply circuit is connected to the control circuit and the filter circuit respectively; The anode of the third diode is connected to the cathode of the first diode, the cathode of the third diode is respectively connected to the second end of the first inductor, the drain of the first buck chip and the anode of the third polar capacitor, the power supply end of the first buck chip is respectively connected to the output end of the first buck chip, the anode of the voltage regulator diode, the second end of the fifth resistor, the gate of the field effect transistor and the first end of the second non-polar capacitor, the current sampling end of the first buck chip is connected to the first end of the third resistor, the cathode of the voltage regulator diode is connected to the cathode of the fifth diode, and the The anode of the fifth diode is respectively connected to the control circuit, the first end of the fourth resistor, the anode of the fourth polar capacitor, the second end of the second inductor and the first end of the third non-polar capacitor; the first end of the second inductor is respectively connected to the second end of the second non-polar capacitor, the second end of the third resistor and the cathode of the fourth diode; the anode of the fourth diode is respectively connected to the second end of the fourth resistor, the cathode of the fourth polar capacitor and the drain of the field effect transistor; the source of the field effect transistor is respectively connected to the first end of the fifth resistor and the cathode of the third polar capacitor; The first power supply circuit is used to obtain the direct current filtered by the filter circuit and step down the voltage, and supply power to the control circuit.

6. The light emitting device according to claim 1, characterized in that: The driving circuit includes a second power supply circuit, and the second power supply circuit includes a second buck chip, a third buck chip, a fourth non-polar capacitor, a fifth non-polar capacitor, a fourth polar capacitor, a sixth diode, a seventh diode, a third inductor, a sixth resistor, a seventh resistor and an eighth resistor; The second power supply circuit is connected to the human-machine interaction circuit and the filter circuit respectively; The drain of the second buck chip is connected to the second end of the first inductor, the power supply end of the second buck chip is respectively connected to the negative electrode of the sixth diode and the first end of the fourth non-polar capacitor, the current sampling end of the second buck chip is respectively connected to the first end of the sixth resistor and the first end of the seventh resistor, the second end of the sixth resistor is respectively connected to the second end of the seventh resistor, the negative electrode of the seventh diode and the output end of the second buck chip, the output end of the second buck chip is respectively connected to the second end of the fourth non-polar capacitor and the first end of the third inductor, the second end of the third inductor is respectively connected to the positive electrode of the sixth diode, the first end of the eighth resistor, the positive electrode of the fourth polar capacitor and the input end of the third buck chip, the output end of the third buck chip is respectively connected to the first end of the fifth non-polar capacitor and the human-computer interaction circuit, and the second end of the fifth non-polar capacitor is respectively connected to the positive electrode of the seventh diode, the second end of the eighth resistor and the negative electrode of the fourth polar capacitor; The second power supply circuit is used to obtain the direct current filtered by the filter circuit and step down the voltage, and to supply power to the human-computer interaction circuit.

7. The light emitting device according to claim 1, characterized in that: The first color temperature range is less than or equal to the first color temperature, the second color temperature range is greater than the first color temperature and less than the second color temperature, and the third color temperature range is greater than or equal to the second color temperature.

8. The light emitting device according to any one of claims 1 to 7, characterized in that: The first color temperature ranges from 2200K to 4000K, and the second color temperature ranges from 4000K to 10000K.

9. A lighting system, characterized in that: The invention comprises a wireless control device and the lighting device as claimed in any one of claims 1 to 8.

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