CN219269121U - Driving circuit of lamp bead and refrigerator - Google Patents
Driving circuit of lamp bead and refrigerator Download PDFInfo
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- CN219269121U CN219269121U CN202223182567.4U CN202223182567U CN219269121U CN 219269121 U CN219269121 U CN 219269121U CN 202223182567 U CN202223182567 U CN 202223182567U CN 219269121 U CN219269121 U CN 219269121U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model provides a driving circuit of a lamp bead and a refrigerator, wherein the driving circuit comprises a light emitter group, a first light emitting unit and a second light emitting unit, wherein the negative electrode of the first light emitting unit is connected with the positive electrode of the second light emitting unit; the first end of the first control unit is connected with the first power interface, the second end of the first control unit is grounded, and the third end of the first control unit is connected with the anode of the first light-emitting unit and the cathode of the second light-emitting unit; the first end of the second control unit is connected with the second power interface, the second end of the second control unit is grounded, and the third end of the second control unit is connected with the negative electrode of the first light-emitting unit and the positive electrode of the second light-emitting unit; if the third end of the first control unit is communicated with the first end, the third end of the second control unit is communicated with the second end, and the first light-emitting unit is lightened; if the third end of the first control unit is conducted with the second end, the third end of the second control unit is conducted with the first end, and then the second light-emitting unit is lighted.
Description
Technical Field
The application relates to the field of household appliances, in particular to a driving circuit of a lamp bead and a refrigerator.
Background
At present, an LED light-emitting lamp and a switch key are frequently used in an electrical product, at the initial stage, people use a straight pull type to drive an LED, and meanwhile, the switch key is also read by the straight pull type, so that the mode uses a plurality of IO ports of an MCU main control chip, and the more the IO ports are, the more expensive the MCU main control chip is, so that the cost is high.
Disclosure of Invention
The utility model provides a driving circuit of a lamp bead and a refrigerator, which can solve the problem that the existing driving circuit needs more IO ports.
The utility model provides a driving circuit of a lamp bead, which is applied to a refrigerator, and comprises:
the light-emitting device comprises a light-emitting device group, a light-emitting device group and a light-emitting device group, wherein the light-emitting device group comprises a first light-emitting unit and a second light-emitting unit, and the negative electrode of the first light-emitting unit is connected with the positive electrode of the second light-emitting unit;
the first end of the first control unit is connected with a first power interface, the second end of the first control unit is grounded, and the third end of the first control unit is connected with the anode of the first light-emitting unit and the cathode of the second light-emitting unit;
the first end of the second control unit is used for being connected with a second power interface, the second end of the second control unit is grounded, and the third end of the second control unit is connected with the negative electrode of the first light-emitting unit and the positive electrode of the second light-emitting unit;
if the third end of the first control unit is conducted with the first end of the first control unit, the third end of the second control unit is conducted with the second end of the second control unit, the first light-emitting unit is lightened, and the second light-emitting unit is turned off;
if the third end of the first control unit is conducted with the second end of the first control unit, the third end of the second control unit is conducted with the first end of the second control unit, the second light-emitting unit is lightened, and the first light-emitting unit is turned off.
Optionally, the first control unit includes a first signal input end, a first switch tube and a second switch tube, where the input end of the first switch tube is connected with the first power interface, the output end of the first switch tube is connected with the positive electrode of the first light emitting unit, the control end of the first switch tube is connected with the control end of the second switch tube to connect with the first signal input end, the output end of the second switch tube is grounded, and the input end of the second switch tube is connected with the negative electrode of the second light emitting unit;
if the first signal input end outputs a low-level signal, the first switching tube is turned on, and the second switching tube is turned off, so that the third end of the first control unit is turned on with the first end of the first control unit;
if the first signal input end outputs a high-level signal, the second switching tube is turned on, and the first switching tube is turned off, so that the third end of the first control unit is turned on with the second end of the first control unit.
Optionally, the second control unit includes a second signal input end, a third switching tube and a fourth switching tube, the control end of the third switching tube is connected with the second signal input end, the input end of the third switching tube is connected with the negative electrode of the first light emitting unit, and the output end of the third switching tube is grounded; the control end of the fourth switching tube is connected with the second signal input end, the input end of the fourth switching tube is connected with the second power interface, and the output end of the fourth switching tube is connected with the positive electrode of the second light-emitting unit;
if the second signal input end outputs a high-level signal, the third switching tube is turned on, and the fourth switching tube is turned off, so that the third end of the second control unit and the second end of the second control unit are turned on;
and if the second signal input end outputs a low-level signal, the fourth switching tube is turned on, and the third switching tube is turned off, so that the third end of the second control unit is turned on with the first end of the second control unit.
Optionally, if the first signal input end outputs a low level signal and the second signal input end outputs a high level signal, the first switching tube and the third switching tube are turned on, the fourth switching tube and the second switching tube are turned off, the first light emitting unit is turned on, and the second light emitting unit is turned off;
if the first signal input end outputs a high-level signal and the second signal input end outputs a low-level signal, the fourth switching tube and the second switching tube are turned on, the first switching tube and the third switching tube are turned off, the second light-emitting unit is turned on, and the first light-emitting unit is turned off.
Optionally, the first control unit further includes a first resistor and a second resistor, one end of the first resistor is connected with the first signal input end, the other end of the first resistor is connected with the input end of the first switching tube, one end of the second resistor is connected with the first signal input end, and the other end of the second resistor is connected with the output end of the second switching tube; and/or
The second control unit further comprises a third resistor and a fourth resistor, one end of the third resistor is connected with the second signal input end, the other end of the third resistor is connected with the input end of the fourth switching tube, one end of the fourth resistor is connected with the output end of the third switching tube, and the other end of the fourth resistor is connected with the second signal input end.
Optionally, the driving circuit includes a plurality of the light emitter groups, a plurality of the first control units and a plurality of the second control units, a plurality of the light emitter groups are arranged in an array, the second light emitting units in the light emitter groups located in the same column are connected with the plurality of the second signal input ends in a one-to-one correspondence manner, and the first light emitting units in the light emitter groups located in the same row are connected with the plurality of the first signal input ends in a one-to-one correspondence manner.
Optionally, the driving circuit further includes a driving chip, where the driving chip includes a plurality of first pins and a plurality of second pins, one of the first pins is connected to the first signal input end to control the first switching tube and the second switching tube to be turned on or off, and one of the second pins is connected to the second signal input end to control the third switching tube and the fourth switching tube to be turned on or off.
Optionally, the plurality of first pins are connected with the plurality of first signal input ends in a one-to-one correspondence manner, and the plurality of second pins are connected with the plurality of second signal input ends in a one-to-one correspondence manner.
Optionally, the first light emitting unit includes one lamp bead or a plurality of lamp beads; and/or
The second light-emitting unit comprises a lamp bead or a plurality of lamp beads.
The utility model also provides a refrigerator which comprises the driving circuit.
The beneficial effects of this application lie in: the utility model provides a light emitter group in a driving circuit of a lamp bead, which comprises a first light emitting unit and a second light emitting unit, wherein the negative electrode of the first light emitting unit is connected with the positive electrode of the second light emitting unit; the first end of the first control unit is connected with the first power interface, the second end of the first control unit is grounded, and the third end of the first control unit is connected with the anode of the first light-emitting unit and the cathode of the second light-emitting unit; the first end of the second control unit is connected with the second power interface, the second end of the second control unit is grounded, and the third end of the second control unit is connected with the negative electrode of the first light-emitting unit and the positive electrode of the second light-emitting unit; if the third end of the first control unit is conducted with the first end of the first control unit, the third end of the second control unit is conducted with the second end of the second control unit, the first light-emitting unit is lightened, and the second light-emitting unit is turned off; if the third end of the first control unit is conducted with the second end of the first control unit, the third end of the second control unit is conducted with the first end of the second control unit, the second light-emitting unit is lightened, and the first light-emitting unit is turned off. According to the utility model, the first control unit is controlled to be connected with the power interface or grounded, the second control unit is controlled to be connected with the power interface or grounded, and then each light-emitting unit can be independently controlled to be turned on or turned off, and the negative electrode of the first light-emitting unit in each group of light-emitting units is connected with the positive electrode of the second light-emitting unit, so that two lamp beads can share one group of the first control unit and the second control unit, one IO port can simultaneously control a plurality of lamp beads, the IO ports are further reduced, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.
Fig. 1 is a schematic diagram of a driving circuit of a lamp bead according to the present utility model.
Fig. 2 is a schematic diagram of a first structure of the driving circuit of the lamp bead shown in fig. 1.
Fig. 3 is a schematic diagram of a second structure of the driving circuit of the lamp bead shown in fig. 1.
Fig. 4 is a schematic diagram of a third structure of the driving circuit of the lamp bead shown in fig. 1.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the existing driving mode of the lamp beads, a plurality of IO ports of the main control chip are needed, and the more the IO ports are, the more expensive the MCU main control chip is, so that the cost is high.
Therefore, in order to solve the above problems, the present application proposes a driving circuit of a lamp bead and a refrigerator. The present application is further described below with reference to the drawings and embodiments.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a driving circuit for a lamp bead according to the present utility model. Fig. 2 is a schematic diagram of a first structure of the driving circuit of the lamp bead shown in fig. 1. The utility model provides a driving circuit 100 of a lamp bead, which is applied to a refrigerator, wherein the driving circuit 100 of the lamp bead comprises a first control unit 10, a second control unit 20 and a light emitter group 310, the light emitter group 310 comprises a first light emitting unit 311 and a second light emitting unit 312, and the cathode of the first light emitting unit 311 is connected with the anode of the second light emitting unit 312; the first end of the first control unit 10 is used for being connected to a first power interface, the second end of the first control unit 10 is grounded, and the third end of the first control unit 10 is connected to the positive electrode of the first light emitting unit 311 and the negative electrode of the second light emitting unit 312 of the light emitter group 310. The first end of the second control unit 20 is connected with a second power interface, the second end of the second control unit 20 is grounded, and the third end of the second control unit 20 is connected with the negative electrode of the first light-emitting unit 311 and the positive electrode of the second light-emitting unit 312; if the third end of the first control unit 10 is connected to the first end of the first control unit 10 and the third end of the second control unit 20 is connected to the second end of the second control unit 20, the first light emitting unit 311 is turned on and the second light emitting unit 312 is turned off; if the third end of the first control unit 10 is connected to the second end of the first control unit 10 and the third end of the second control unit 20 is connected to the first end of the second control unit 20, the second light emitting unit 312 is turned on, and the first light emitting unit 311 is turned off. The utility model controls the third end of the first control unit 10 to be conducted with the first end or the third end to be conducted with the second end so as to control the first control unit 10 to be used as an input end or an output end, and controls the third end of the second control unit 20 to be conducted with the first end or the third end to be conducted with the second end so as to control the second control unit 20 to be used as the input end or the output end, and further, the state of each light-emitting unit can be independently controlled through different combinations of the first control unit 10 and the second control unit 20. And the negative electrode of the first light emitting unit 311 in each group of light emitter group 310 is connected with the positive electrode of the second light emitting unit 312, so that two lamp beads can share one group of the first control unit 10 and the second control unit 20, and one IO port can simultaneously control a plurality of lamp beads, thereby reducing the IO ports and saving the cost.
The first control unit 10 includes a first signal input terminal 110, first and second switching transistors Q1 and Q2, and a first power supply interface VSS1. The first signal input end 110 of the first switching tube Q1 is connected to the control end of the first switching tube Q1, the input end of the first switching tube Q1 is connected to the first power interface VSS1, and the output end of the first switching tube Q1 is connected to the positive electrode of the first light emitting unit 311. The control terminal of the second switching tube Q2 is connected to the first signal input terminal 110, the output terminal of the second switching tube Q2 is grounded, and the input terminal of the second switching tube Q2 is connected to the negative electrode of the second light emitting unit 312.
If the first signal input terminal 110 outputs a low level signal, the first switching tube Q1 is turned on, and the second switching tube Q2 is turned off, so that the third terminal of the first control unit 10 is turned on with the first terminal of the first control unit 10, that is, the first control unit 10 is connected to the first power interface VSS1.
If the first signal input terminal 110 outputs a high level signal, the second switching tube Q2 is turned on, and the first switching tube Q1 is turned off, so that the third terminal of the first control unit 10 is turned on with the second terminal of the first control unit 10, that is, the first control unit 10 is grounded.
The second control unit 20 includes a second signal input end 210, a third switching tube Q3, a fourth switching tube Q4, and a second power interface VSS2, a control end of the third switching tube Q3 is connected to the second signal input end 210, an input end of the third switching tube Q3 is connected to a negative electrode of the first light emitting unit 311, and an output end of the third switching tube Q3 is grounded. The control end of the fourth switching tube Q4 connected to the positive electrode of the second light emitting unit 312 is connected to the second signal input end 210, the input end of the fourth switching tube Q4 is connected to the second power interface VSS2, and the output end of the fourth switching tube Q4 is connected to the positive electrode of the second light emitting unit 312.
If the second signal input end 210 outputs a high level signal, the third switching tube Q3 is turned on, and the fourth switching tube Q4 is turned off, so that the third end of the second control unit 20 and the second end of the second control unit 20 are turned on, that is, the second control unit 20 is connected to the second power interface VSS2.
If the second signal input end 210 outputs a low level signal, the fourth switching tube Q4 is turned on, and the third switching tube Q3 is turned off, so that the third end of the second control unit 20 is turned on with the first end of the second control unit 20, that is, the second control unit 20 is grounded.
The first signal input terminal 110 may be an output port or an input port, and the second signal input terminal 210 may be an output port or an input port.
When the first control unit 10 is used as an input port and the second control unit 20 is used as an output port, that is, when the first signal input terminal 110 outputs a low level signal and the second signal input terminal 210 outputs a high level signal, the first switching tube Q1 is turned on, the third switching tube Q3 is turned on, and the first light emitting unit 311 connected to the first signal input terminal 110 and the second signal input terminal 210 is turned on. For example, the current output by the first power interface VSS1 flows to the positive electrode of the first light emitting unit 311 after passing through the first switching tube Q1, and then the current passes through the negative electrode of the first light emitting unit 311 and the third switching tube Q3 from the positive electrode of the first light emitting unit 311 to be grounded, so that the first light emitting unit 311 connected to the first control unit 10 is turned on.
When the first control unit 10 is used as an output port and the second control unit 20 is used as an input port, that is, the first control unit 10 provides a high level, and the second control unit 20 provides a low level, that is, when the first signal input terminal 110 outputs a high level signal and the second signal input terminal 210 outputs a low level signal, the fourth switching tube Q4 is turned on, the second switching tube Q2 is turned on, and the second light emitting unit 312 connecting the first control unit 10 and the second control unit 20 is turned on. Therefore, the current output by the second power interface VSS2 flows to the positive electrode of the second light emitting unit 312 through the fourth switching tube Q4, and the current sequentially passes through the negative electrode of the second light emitting unit 312 and the second switching tube Q2 from the positive electrode of the second light emitting unit 312 and then is grounded, so that the second light emitting unit 312 is turned on, thereby lighting the second light emitting unit 312 connected to the second control unit 20.
Therefore, if the first signal input terminal 110 outputs a low level signal and the second signal input terminal 210 outputs a high level signal, the first switching tube Q1 and the third switching tube Q3 are turned on, the first light emitting unit 311 is turned on, the fourth switching tube Q4 and the second switching tube Q2 are turned off, and the second light emitting unit 312 is turned off; if the first signal input terminal 110 outputs a high level signal and the second signal input terminal 210 outputs a low level signal, the fourth switching tube Q4 and the second switching tube Q2 are turned on, the second light emitting unit 312 is turned on, the first switching tube Q1 and the third switching tube Q3 are turned off, and the first light emitting unit 311 is turned off. The present utility model controls the first signal input terminal 110 and the second signal input terminal 210 to input different signals, so as to control the on or off of the first switching tube Q1, the third switching tube Q3, the fourth switching tube Q4 and the second switching tube Q2, and further control the on or off of the first light emitting unit 311 and the second light emitting unit 312. The IO interface is reduced, a control circuit is simplified, and a control mode is simplified.
In other embodiments, each first control unit 10 further includes a first resistor R1 and a second resistor R2, where one end of the first resistor R1 is connected to the first signal input terminal 110, the other end of the first resistor R1 is connected to the input terminal of the first switching tube Q1, one end of the second resistor R2 is connected to the first signal input terminal 110, and the other end of the second resistor R2 is connected to the output terminal of the second switching tube Q2. The first resistor R1 is mainly used for pulling up the signal, and the second resistor R2 is mainly used for pulling down the signal.
In other embodiments, each first control unit 10 further includes a fifth resistor R5, one end of the fifth resistor R5 is connected to the first signal input terminal 110, and the other end of the fifth resistor R5 is connected to the control terminal of the first switching tube Q1. The fifth resistor R5 is mainly used for protecting the first signal input terminal 110, and preventing damage to the first signal input terminal 110 caused by excessive current.
In other embodiments, each first control unit 10 further includes a sixth resistor R6, one end of the sixth resistor R6 is connected to the output end of the first switching tube Q1, the other end of the sixth resistor R6 is connected to the input end of the second switching tube Q2, and the sixth resistor R6 is used for protecting a circuit.
In some embodiments, each of the second control units 20 further includes a third resistor R3 and a fourth resistor R4, one end of the third resistor R3 is connected to the second signal input terminal 210, the other end of the third resistor R3 is connected to the input terminal of the fourth switching tube Q4, one end of the fourth resistor R4 is connected to the output terminal of the third switching tube Q3, and the other end of the fourth resistor R4 is connected to the second signal input terminal 210. The third resistor R3 is mainly used for pulling up the signal, and the fourth resistor R4 is mainly used for pulling down the signal.
In other embodiments, each first control unit 10 further includes a seventh resistor R7, one end of the seventh resistor R7 is connected to the second signal input terminal 210, and the other end of the seventh resistor R7 is connected to the control terminal of the third switching tube Q3. The seventh resistor R7 is mainly used for protecting the second signal input terminal 210 from damage caused by excessive current to the second signal input terminal 210.
In other embodiments, each first control unit 10 further includes an eighth resistor R8, one end of the eighth resistor R8 is connected to the output end of the fourth switching tube Q4, the other end of the eighth resistor R8 is connected to the input end of the third switching tube Q3, and the eighth resistor R8 is used for protecting a circuit.
The first switching tube Q1 may be a triode, a transistor or a field effect tube, and the third switching tube Q3 may be a triode, a transistor or a field effect tube, which may be specifically set according to practical situations, and is not specifically limited herein.
The driving circuit 100 further includes a driving chip, where the driving chip includes a plurality of first pins and a plurality of second pins, and one first pin is configured to be connected to one first signal input terminal 110, so as to provide different signals to the first signal input terminal 110 through the first pin, thereby controlling the first switching tube Q1 to be turned on or off, and further controlling the first light emitting unit 311 to be turned on or off. A second pin is connected to a second signal input terminal 210, so as to provide different signals to the second signal input terminal 210 through the second pin, thereby controlling the third switching tube Q3 to be turned on or off, and further controlling the second light emitting unit 312 to be turned on or off.
In some embodiments, the plurality of first pins are connected in one-to-one correspondence with the plurality of first signal inputs 110, and the plurality of second pins are connected in one-to-one correspondence with the plurality of second signal inputs 210.
It will be appreciated that in some embodiments, the first power interface VSS1 and the second power interface VSS2 are not provided in the driving circuit 100, and are connected to the first control unit 10 and the second control unit 20 through pins of the driving chip to directly provide the first light emitting unit 311 and the second light emitting unit 312 with electrical levels.
When the number of the first control units 10 is equal to the number of the second control units 20 and the plurality of light emitter groups 310 are in an array, the second light emitting units 312 in the light emitter groups 310 in the same column are connected in one-to-one correspondence with the plurality of second control units 20, and the first light emitting units 311 in the light emitter groups 310 in the same row are connected in one-to-one correspondence with the plurality of first control units 10.
The driving circuit 100 includes 3 rows of lamp bead units 30, 3 first control units 10 and 3 second control units 20, each row of lamp bead units 30 includes 3 groups of light emitting units 310, each group of light emitting units 310 includes a first light emitting unit 311 and a second light emitting unit 312, and a connection between a negative electrode of the first light emitting unit 311 and a positive electrode of the second light emitting unit 312 is illustrated as an example. It will be appreciated that the present utility model is described above by way of example, and is not to be construed as being limited thereto, and that the specific arrangement of the driving circuit 100 may be set according to actual circumstances, and is not particularly limited thereto.
The driving circuit 100 includes a first row of bead units, a second row of bead units, and a third row of bead units, and a first signal input to the third row of bead units from one of the 3 first control units 10 is connected to the first row of bead units, one of the first control units 10 is connected to the second row of bead units, and the other of the first control units 10 is connected to the third row of bead units. One second control unit 20 of the 3 second control units 20 is connected with the first row of lamp bead units, one second control unit 20 is connected with the second row of lamp bead units, and the other second control unit 20 is connected with the third row of lamp bead units.
With continued reference to fig. 3, fig. 3 is a schematic diagram of a second structure of the driving circuit of the lamp bead shown in fig. 1. In some embodiments, to control more light emitter groups 310, the number of columns of the light beads may be greater than the number of first control units, or the number of rows of the light beads may be greater than the number of second control units. In some embodiments, the plurality of light emitter groups are arranged in an array, the light bead units located in different rows are connected to the plurality of second control units in a one-to-one correspondence, and the light bead units in at least two different rows are connected to the same second control unit. In other embodiments, the plurality of light emitter groups are arranged in an array, the light bead units located in different rows are connected to the plurality of second control units in a one-to-one correspondence, and the light bead units in at least two different columns are connected to the same first control unit. Through combining the setting with a plurality of lamp pearls, can control a plurality of lamp pearls simultaneously, further reduction IO mouth.
In other embodiments, the number of rows may be directly combined in a certain number of rows, that is, the first light emitting unit 311 may include one bead or a plurality of beads, or the second light emitting unit 312 may include one bead or a plurality of beads, that is, the first light emitting unit 311 may include a plurality of beads, and the second light emitting unit 312 may include a plurality of beads. The plurality of beads may be connected in series or in parallel according to voltage or current requirements, for example, if voltage is guaranteed, the plurality of beads may be connected in parallel, if current is guaranteed, the plurality of beads may be connected in series, and a specific connection manner may be set according to actual conditions, which is not limited herein.
With continued reference to fig. 4, fig. 4 is a schematic diagram of a third structure of the driving circuit of the lamp bead shown in fig. 1. In some embodiments, a first control unit 10 may be added when a row of bead units 30 is added, or a second control unit 20 may be added when a row of bead units 30 is added, so that the IO port may be further reduced, and the cost may be reduced.
When the number of the first control units 10 is equal to the number of the second control units 20, and the number of rows in the array is greater than the number of columns in the plurality of light emitter groups 310, the second light emitting units 312 in the light emitter groups 310 in different columns are connected to the plurality of second control units 20 in a one-to-one correspondence, and the first light emitting units 311 in the light emitter groups 310 in at least two different rows are connected to the same second control unit 20. That is, when the number of rows of the light bead units 30 is greater than the number of the second control units 20, and the number of columns of the light bead units 30 is the same as the number of the first control units 10, the light emitter groups 310 in different columns are connected to the input units of the first signal input terminals 110 correspondingly, and at least one second control unit 20 is connected to the light emitter groups 310 in multiple rows.
The utility model also provides a refrigerator, which comprises the driving circuit.
The driving circuit of the lamp bead and the refrigerator provided by the utility model are described in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, with the description of the examples given above only to assist in understanding the present application. Meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.
Claims (10)
1. A driving circuit of a lamp bead, which is applied to a refrigerator, characterized in that the driving circuit comprises:
the light-emitting device comprises a light-emitting device group, a light-emitting device group and a light-emitting device group, wherein the light-emitting device group comprises a first light-emitting unit and a second light-emitting unit, and the negative electrode of the first light-emitting unit is connected with the positive electrode of the second light-emitting unit;
the first end of the first control unit is connected with a first power interface, the second end of the first control unit is grounded, and the third end of the first control unit is connected with the anode of the first light-emitting unit and the cathode of the second light-emitting unit;
the first end of the second control unit is connected with a second power interface, the second end of the second control unit is grounded, and the third end of the second control unit is connected with the negative electrode of the first light-emitting unit and the positive electrode of the second light-emitting unit;
if the third end of the first control unit is conducted with the first end of the first control unit, the third end of the second control unit is conducted with the second end of the second control unit, the first light-emitting unit is lightened, and the second light-emitting unit is turned off;
if the third end of the first control unit is conducted with the second end of the first control unit, the third end of the second control unit is conducted with the first end of the second control unit, the second light-emitting unit is lightened, and the first light-emitting unit is turned off.
2. The driving circuit according to claim 1, wherein the first control unit includes a first signal input terminal, a first switching tube, and a second switching tube, the input terminal of the first switching tube is connected to the first power interface, the output terminal of the first switching tube is connected to the positive electrode of the first light emitting unit, the control terminal of the first switching tube is connected to the control terminal of the second switching tube, the output terminal of the second switching tube is grounded, and the input terminal of the second switching tube is connected to the negative electrode of the second light emitting unit;
if the first signal input end outputs a low-level signal, the first switching tube is turned on, and the second switching tube is turned off, so that the third end of the first control unit is turned on with the first end of the first control unit;
if the first signal input end outputs a high-level signal, the second switching tube is turned on, and the first switching tube is turned off, so that the third end of the first control unit is turned on with the second end of the first control unit.
3. The driving circuit according to claim 2, wherein the second control unit includes a second signal input terminal, a third switching tube, and a fourth switching tube, the control terminal of the third switching tube is connected to the second signal input terminal, the input terminal of the third switching tube is connected to the negative electrode of the first light emitting unit, and the output terminal of the third switching tube is grounded; the control end of the fourth switching tube is connected with the second signal input end, the input end of the fourth switching tube is connected with the second power interface, and the output end of the fourth switching tube is connected with the positive electrode of the second light-emitting unit;
if the second signal input end outputs a high-level signal, the third switching tube is turned on, and the fourth switching tube is turned off, so that the third end of the second control unit and the second end of the second control unit are turned on;
and if the second signal input end outputs a low-level signal, the fourth switching tube is turned on, and the third switching tube is turned off, so that the third end of the second control unit is turned on with the first end of the second control unit.
4. The driving circuit according to claim 3, wherein,
if the first signal input end outputs a low-level signal and the second signal input end outputs a high-level signal, the first switching tube and the third switching tube are turned on, the fourth switching tube and the second switching tube are turned off, the first light-emitting unit is turned on, and the second light-emitting unit is turned off;
if the first signal input end outputs a high-level signal and the second signal input end outputs a low-level signal, the fourth switching tube and the second switching tube are turned on, the first switching tube and the third switching tube are turned off, the second light-emitting unit is turned on, and the first light-emitting unit is turned off.
5. The driving circuit according to claim 4, wherein the first control unit further comprises a first resistor and a second resistor, one end of the first resistor is connected to the first signal input terminal, the other end of the first resistor is connected to the input terminal of the first switching tube, one end of the second resistor is connected to the first signal input terminal, and the other end of the second resistor is connected to the output terminal of the second switching tube; and/or
The second control unit further comprises a third resistor and a fourth resistor, one end of the third resistor is connected with the second signal input end, the other end of the third resistor is connected with the input end of the fourth switching tube, one end of the fourth resistor is connected with the output end of the third switching tube, and the other end of the fourth resistor is connected with the second signal input end.
6. The driving circuit according to claim 1, wherein the driving circuit comprises a plurality of the light emitter groups, a plurality of the first control units and a plurality of the second control units, the plurality of the light emitter groups are arranged in an array, the second light emitting units in the light emitter groups located in the same column are connected in one-to-one correspondence with the plurality of the second signal input terminals, and the first light emitting units in the light emitter groups located in the same row are connected in one-to-one correspondence with the plurality of the first signal input terminals.
7. The driver circuit of claim 6 further comprising a driver chip including a plurality of first pins and a plurality of second pins, one of the first pins being connected to one of the first signal inputs to control the first and second switching tubes to turn on or off, one of the second pins being connected to one of the second signal inputs to control the third and fourth switching tubes to turn on or off.
8. The driver circuit of claim 7, wherein the first plurality of pins are connected in a one-to-one correspondence with the first plurality of signal inputs and the second plurality of pins are connected in a one-to-one correspondence with the second plurality of signal inputs.
9. The drive circuit of claim 1, wherein the first light emitting unit comprises a single light bulb or a plurality of light bulbs; and/or
The second light-emitting unit comprises a lamp bead or a plurality of lamp beads.
10. A refrigerator, characterized in that the refrigerator comprises the drive circuit of any one of the above 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223182567.4U CN219269121U (en) | 2022-11-28 | 2022-11-28 | Driving circuit of lamp bead and refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223182567.4U CN219269121U (en) | 2022-11-28 | 2022-11-28 | Driving circuit of lamp bead and refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219269121U true CN219269121U (en) | 2023-06-27 |
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ID=86873667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223182567.4U Active CN219269121U (en) | 2022-11-28 | 2022-11-28 | Driving circuit of lamp bead and refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219269121U (en) |
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2022
- 2022-11-28 CN CN202223182567.4U patent/CN219269121U/en active Active
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