CN219716441U - Driving circuit and display screen - Google Patents
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Abstract
The utility model provides a driving circuit and a display screen, wherein the driving circuit comprises a power supply module, a line scanning module, a red light driving module, a blue light driving module, a green light driving module and a light-emitting diode tri-color lamp. The power supply module comprises a common anode terminal, a first voltage output terminal and a second voltage output terminal; the light-emitting diode tri-colored lamps comprise red lamps, green lamps and blue lamps. The driving circuit can divide the voltage to drive the LED tri-color lamp, so that the LED tri-color lamp is not required to be driven by using a maximum driving voltage, and the energy consumption can be saved.
Description
Technical Field
The present utility model relates to the field of electronic circuits, and in particular, to a driving circuit and a display screen.
Background
The inside of an LED (light-emitting diode) display screen is composed of LEDs with three colors of red, green and blue, the LEDs can emit different colors by using a three-primary-color principle, and the driving voltages of the red, green and blue lamps in the LEDs are different. In the related art, the LED display is driven by the same voltage, and the driving voltage used must be the highest driving voltage among all devices, resulting in energy consumption waste.
Disclosure of Invention
The embodiment of the utility model mainly aims at providing a driving circuit and a display screen. The LED tri-color lamp is driven by the driving circuit in a voltage dividing way, so that energy consumption can be saved.
In order to achieve the above objective, an embodiment of the present utility model provides a driving circuit, which includes a power module, a line scanning module, a red light driving module, a blue light driving module, a green light driving module, and a light emitting diode tri-color lamp;
the power supply module comprises a common anode terminal, a first voltage output terminal and a second voltage output terminal;
the light-emitting diode tri-color lamps comprise red lamps, green lamps and blue lamps;
the first end of the line scanning module is connected with the common anode end, and the second end of the line scanning module is connected with the positive electrode of the red light, the positive electrode of the green light and the positive electrode of the blue light;
the first end of the red light driving module is connected with the common anode end, the second end of the red light driving module is connected with the first voltage output end, and the third end of the red light driving module is connected with the negative electrode of the red light;
the first end of the green light driving module is connected with the common anode end, the second end of the green light driving module is connected with the second voltage output end, and the third end of the green light driving module is connected with the negative electrode of the green light;
the first end of the blue lamp driving module is connected with the common anode end, the second end of the blue lamp driving module is connected with the second voltage output end, and the third end of the blue lamp driving module is connected with the cathode of the blue lamp.
In one embodiment of the present utility model, the power module further includes:
the power supply input end is used for accessing a first positive voltage;
the first end of the buck conversion circuit is connected with the power input end, the second end of the buck conversion circuit is connected with the common anode end, and the buck conversion circuit is used for converting the first positive voltage into a second positive voltage;
the second terminal of the buck converter circuit outputs a first negative voltage with respect to the power supply input terminal, and the common anode terminal outputs a second negative voltage with respect to the second terminal of the buck converter circuit.
In one embodiment of the utility model, the second positive voltage is lower than the first positive voltage.
In one embodiment of the present utility model, the first negative voltage is an opposite number of a difference between the first positive voltage and the second positive voltage, and the second negative voltage is an opposite number of the second positive voltage.
In one embodiment of the present utility model, the first voltage output terminal is configured to output the first negative voltage, and the first negative voltage is-3.0V to-3.2V.
In one embodiment of the present utility model, the second voltage output terminal is configured to output the second negative voltage, and the second negative voltage is between-3.8V and-4.2V.
In one embodiment of the present utility model, a first rectifying and filtering circuit is connected between the first voltage output end and the power ground, and a second rectifying and filtering circuit is connected between the second voltage output end and the power ground.
In one embodiment of the present utility model, the first rectifying and filtering circuit includes a plurality of first capacitors connected in parallel between the first voltage output terminal and a power ground; the second rectifying and filtering circuit comprises a plurality of second capacitors which are connected in parallel between the second voltage output end and the power ground.
In one embodiment of the present utility model, a third terminal of the line scan module is connected to the second voltage output terminal.
According to another aspect of the embodiments of the present utility model, there is provided a display screen including the driving circuit in the above embodiments.
The utility model provides a driving circuit and a display screen, wherein the driving circuit comprises a power supply module, a line scanning module, a red light driving module, a blue light driving module, a green light driving module and a light-emitting diode tri-color lamp. The power supply module comprises a common anode terminal, a first voltage output terminal and a second voltage output terminal; the LED tri-color lamps comprise red lamps, green lamps and blue lamps; the first end of the line scanning module is connected with the common anode end, and the second end of the line scanning module is connected with the anode of the red light, the anode of the green light and the anode of the blue light; the first end of the red light driving module is connected with the common anode end, the second end of the red light driving module is connected with the first voltage output end, and the third end of the red light driving module is connected with the cathode of the red light; the first end of the green light driving module is connected with the common anode end, the second end of the green light driving module is connected with the second voltage output end, and the third end of the green light driving module is connected with the negative electrode of the green light; the first end of the blue lamp driving module is connected with the common anode end, the second end of the blue lamp driving module is connected with the second voltage output end, and the third end of the blue lamp driving module is connected with the cathode of the blue lamp. The driving circuit can divide the voltage to drive the LED tri-color lamp, so that the LED tri-color lamp is not required to be driven by using a maximum driving voltage, and the energy consumption can be saved.
Drawings
Fig. 1 is a schematic block diagram of a driving circuit provided by an embodiment of the present utility model;
FIG. 2 is a circuit diagram of a power module according to an embodiment of the present utility model;
FIG. 3 is another circuit diagram of a power module according to an embodiment of the present utility model;
FIG. 4 is another schematic block diagram of a drive circuit provided by an embodiment of the present utility model;
FIG. 5 is another circuit diagram of a driving circuit according to an embodiment of the present utility model;
fig. 6 is a schematic block diagram of a display screen provided by an embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It should be noted that although functional block division is performed in a device diagram and a logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in the device, or in the flowchart. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein is for the purpose of describing embodiments of the utility model only and is not intended to be limiting of the utility model.
The energy is saved, the life is low carbon, and the method is a common prospect of the whole society. Meanwhile, the energy-saving and environment-friendly requirements on various application products and services are promoted, and the LED display screen is more and more favored by wide terminal customers and operators due to the advantages of high brightness, long service life, large visual angle and the like. The method is widely applied to various large fields of business display, meeting, performance, traffic and the like, and has huge consumption and application markets.
As LED display screens become more popular, energy conservation of LED display screens is also becoming more and more of a concern in the market. The LED display screen mainly comprises an LED and a driving chip, wherein the driving voltages of the red, green and blue lamps in the LED are different, the driving voltages of the chips are also different, and the LED display screen can be obviously optimized by matching proper driving voltages with the LED lamps and the driving chips of each color.
Currently the dominant LED display is driven with a voltage that must be the highest driving voltage among all devices. For low drive voltage devices, high drive voltages can result in wasted power consumption. Meanwhile, the low-driving-voltage element consumes a part of redundant energy, and becomes heat energy to generate high temperature, so that the temperature of the LED display screen is increased, and the service life of the LED display screen is further influenced.
In the related art, a common-negative dual-voltage power supply is adopted to drive an LED display screen, one power supply outputs dual negative voltage, one power supply is-2.8V, the other power supply is-3.8V, and a common electrode is a cathode. The mode can also carry out partial pressure driving on the LED display screen, but the common electrode of the power supply is a cathode, and the corresponding matched driving chip and LED are required to be specially manufactured, which is different from the conventional devices on the market. The production needs to be customized in advance, the production and sales of manufacturers are directional, the delivery period is long, the yield is low, the batch production is unstable, the product quality is difficult to guarantee, the production cost is high, and the cost of the LED display screen is high.
Based on the above, the embodiment of the utility model provides a driving circuit which can divide the voltage to drive the LED tri-color lamp, thereby saving energy consumption. Meanwhile, the common electrode of the power supply module is an anode, and the matched driving chip, the LED device and the like are the same as the existing related devices, so that special production is not needed, and the cost can be effectively reduced.
Referring to fig. 1, fig. 1 is a schematic block diagram of a driving circuit provided in an embodiment of the present utility model. As shown in fig. 1, the driving circuit 100 includes a power module 110, a row scanning module 120, a red light driving module 130, a green light driving module 140, a blue light driving module 150, and a light emitting diode tri-color light 160. The power module 110 includes a common anode terminal 111, a first voltage output terminal 112, and a second voltage output terminal 113. The led tri-lamps 160 include red 161, green 162 and blue 163 lamps. The first end of the line scan module 120 is connected to the common anode terminal 111, and the second end of the line scan module 120 is connected to the anode of the red light 161, the anode of the green light 162, and the anode of the blue light 163. The first end of the red light driving module 130 is connected to the common anode end 111, the second end of the red light driving module 130 is connected to the first voltage output end 112, and the third end of the red light driving module 130 is connected to the cathode of the red light 161. The first end of the green light driving module 140 is connected to the common anode end 111, the second end of the green light driving module 140 is connected to the second voltage output end 113, and the third end of the green light driving module 140 is connected to the cathode of the green light 162. The first end of the blue lamp driving module 150 is connected to the common anode terminal 111, the second end of the blue lamp driving module 150 is connected to the second voltage output terminal 113, and the third end of the blue lamp driving module 150 is connected to the cathode of the blue lamp 163.
In the embodiment of the present utility model, the common anode terminal 111, the line scanning module 120, the positive electrode of the red light 161, the negative electrode of the red light 161, the red light driving module 130, and the first voltage output terminal 112 form a driving circuit of the red light 161. Thus, the voltage difference V1 between the common anode terminal 111 and the first voltage output terminal 112 is used to drive the red lamp 161.
The common anode terminal 111, the line scanning module 120, the positive electrode of the green light 162, the negative electrode of the green light 162, the green light driving module 140 and the second voltage output terminal 113 form a driving loop of the green light 162. Thus, the voltage difference V2 between the common anode terminal 111 and the second voltage output terminal 113 is used to drive the green light 162.
The common anode terminal 111, the row scan module 120, the anode of the blue lamp 163, the cathode of the blue lamp 163, the blue lamp driving module 150, and the second voltage output terminal 113 constitute a driving circuit of the blue lamp 163. Thus, the voltage difference V2 between the common anode terminal 111 and the second voltage output terminal 113 is used to drive the blue lamp 163.
That is, the driving circuit 100 in the embodiment of the utility model drives the red light 161 through the voltage difference V1, drives the green light 162 and the blue light 163 through the voltage difference V2, and can effectively save energy consumption through the voltage division driving mode. Meanwhile, the common electrode of the power module 110 is an anode, so that the corresponding matched driving chip and LED are ensured to be the same as those of conventional devices in the market, special production is not needed, and the cost can be effectively reduced.
It should be noted that, referring to fig. 1, the common anode terminal 111, the red light driving module 130, and the first voltage output terminal 112 form a driving loop of the red light driving module 130, that is, the voltage difference V1 may also be used to drive the red light driving module 130. Likewise, the common anode terminal 111, the green light driving module 140, and the second voltage output terminal 113 form a driving loop of the green light driving module 140, i.e. the voltage difference V2 can also be used to drive the green light driving module 140. The common anode terminal 111, the blue lamp driving module 150, and the second voltage output terminal 113 form a driving loop of the blue lamp driving module 150, i.e. the voltage difference V2 can also be used to drive the blue lamp driving module 150.
It should be noted that, in the embodiment of the present utility model, the red light driving module 130 is a chip for driving the cathode of the red light 161, the green light driving module 140 is a chip for driving the cathode of the green light 162, and the blue light driving module 150 is a chip for driving the cathode of the blue light 163. Therefore, each driving chip is driven by different voltages, and energy consumption can be saved in a voltage division driving mode.
In one embodiment of the present utility model, referring to fig. 2, fig. 2 is a schematic block diagram of a power module provided by an embodiment of the present utility model. As shown in fig. 2, the common anode terminal 111 is used for outputting a common voltage of 0V, and the power module further includes a power input terminal 114 and a buck conversion circuit 115. The power input 114 is used to access a first positive voltage V 1 The method comprises the steps of carrying out a first treatment on the surface of the A first terminal of the buck converter circuit 115 is connected to the power input terminal 114, and a second terminal of the buck converter circuit 115 is connected to the common anode terminal 111. Wherein the buck conversion circuit 115 is used for converting a first positive voltage V 1 Converted into a second positive voltage V 2 . Thus, the second terminal of the buck converter 115 outputs a first negative voltage, V, to the power input terminal 114 2 -V 1 The common anode terminal 111 outputs a second negative voltage of-V with respect to the second terminal of the buck converter circuit 115 2 。
It should be noted that, in the power module 110 according to the embodiment of the present utility model, the common anode terminal 111 may be used to output the common voltage 0V, and the buck converter 115 may be used to output the first negative voltage and the second negative voltage, that is, may output the common voltage and the dual negative voltages.
In one embodiment of the utility model, the second positive voltage is lower than the first positive voltage.
In the embodiment of the utility model, a first positive voltage V 1 The voltage drops after passing through the buck converter circuit 115, so that a second positive voltage V is output through a second end of the buck converter circuit 115 2 Lower than the first positive voltage V 1 . Thus, the common anode terminal 111 outputs a second negative voltage, which is-V2, with respect to the second terminal of the buck converter circuit 115, and the second terminal of the buck converter circuit 115 outputs with respect to the power supply input terminal 114A first negative voltage is generated, the first negative voltage is V 2 -V 1 Less than 0. I.e. the voltage is reduced by the buck converter circuit 115 to enable a final output of two negative voltages.
In one embodiment of the present utility model, the first negative voltage is the opposite number of the difference between the first positive voltage and the second positive voltage, and the second negative voltage is the opposite number of the second positive voltage.
In the embodiment of the present utility model, since the voltage at the second terminal of the buck converter 115 is the second positive voltage V 2 The voltage at the power input 114 is a first positive voltage V 1 The voltage at the second terminal of the buck converter 115 with respect to the power input terminal 114 is thus V 2 -V 1 I.e. the first negative voltage is the opposite number of the difference between the first positive voltage and the second positive voltage. Similarly, since the voltage of the common anode terminal 111 is 0, the voltage of the second terminal of the buck converter 115 is the second positive voltage V 2 Therefore, the voltage of the common anode terminal 111 with respect to the second terminal of the buck converter circuit 115 is-V 2 I.e. the second negative voltage is the opposite number of the second positive voltage.
In one embodiment of the present utility model, the first voltage output terminal is configured to output a first negative voltage, and the first negative voltage is-3.0V to-3.2V.
In the embodiment of the present utility model, the first voltage output terminal 112 is used for outputting a first negative voltage V 2 -V 1 . Wherein the first negative voltage V 2 -V 1 Ranging from-3.0V to-3.2V. By setting a first negative voltage V 2 -V 1 Can effectively drive the red light driving module 130 and the red light 161, can ensure that the driving voltage is not too large, and can maximally save energy consumption.
It will be appreciated that the first negative voltage V 2 -V 1 The upper and lower limits of the values may fluctuate within a tolerance range.
In one embodiment of the present utility model, the second voltage output terminal is configured to output a second negative voltage, the second negative voltage being-3.8V to-4.2V.
In the embodiment of the present utility model, the second voltage output terminal 113 is used for outputting a second negative voltage-V 2 . Wherein the second negativeVoltage-V 2 Ranging from-3.8V to-4.2V. By setting a second negative voltage-V 2 Can effectively drive the green light driving module 140, the green light 162, the blue light driving module 150 and the blue light 163, can ensure that the driving voltage is not too large, and can maximally save energy consumption.
It is also understood that the second negative voltage-V 2 The upper and lower limits of the values may fluctuate within a tolerance range.
In one embodiment of the present utility model, a first rectifying and filtering circuit is connected between the first voltage output terminal and the power ground, and a second rectifying and filtering circuit is connected between the second voltage output terminal and the power ground.
In the embodiment of the utility model, in order to ensure that the first voltage output end can output stable first negative voltage V 2 -V 1 A first rectifying and filtering circuit is connected between the first voltage output 112 and the power ground. When the voltage is alternating, the voltage at the two ends can not be suddenly changed due to the voltage stabilizing effect of the first rectifying and filtering circuit, so that the first negative voltage V can be ensured 2 -V 1 So that efficient driving of the red light driving module 130 and the red light 161 can be ensured.
Likewise, in the embodiment of the present utility model, in order to ensure that the second voltage output terminal can output a stable second negative voltage-V 2 A second rectifying and filtering circuit is connected between the second voltage output terminal 113 and the power ground GND. When the voltage is alternating, the voltage at the two ends can not be suddenly changed due to the voltage stabilizing effect of the second rectifying and filtering circuit, so that the second negative voltage-V can be ensured 2 So that effective driving of the green light driving module 140, the green light 162, the blue light driving module 150, and the blue light 163 can be ensured.
Specifically, the first rectifying and filtering circuit comprises a plurality of first capacitors, and the plurality of first capacitors are connected in parallel between the first voltage output end and the power ground. The second rectifying and filtering circuit comprises a plurality of second capacitors which are connected in parallel between the second voltage output end and the power ground.
In one embodiment of the present utility model, referring to fig. 3, fig. 3 is another circuit diagram of a power module according to an embodiment of the present utility model. As shown in fig. 3, a plurality of high-frequency capacitors are connected in parallel between the first voltage output terminal 112 and the second voltage output terminal 113.
In the embodiment of the present utility model, a plurality of high-frequency capacitors (C1, C2, C3, C4) are connected in parallel between the first voltage output terminal 112 and the second voltage output terminal 113, i.e. at the output first negative voltage V 2 -V 1 And a second negative voltage-V 2 The high-frequency capacitor is connected in parallel, and the first negative voltage V can be effectively avoided through the high-frequency capacitor 2 -V 1 And a second negative voltage-V 2 Mutual interference between them, can ensure the first negative voltage V 2 -V 1 And a second negative voltage-V 2 And thus the corresponding electronic device can be effectively driven.
In one embodiment of the present utility model, referring to fig. 1, the third terminal of the row scan module is connected to the second voltage output terminal.
In the embodiment of the present utility model, the third terminal of the row scan module 120 is connected to the second voltage output terminal 113. That is, the second negative voltage V2 output from the second voltage output terminal 113 may also flow to the row scan module 120. Thus, the common anode terminal 111, the row scan module 120, and the second voltage output terminal 113 constitute a driving circuit of the row scan module 120. I.e., the second negative voltage V2 output from the second voltage output terminal 113 is also used to drive the row scan module 120.
In one embodiment of the present utility model, referring to fig. 4, fig. 4 is another schematic block diagram of a driving circuit provided by an embodiment of the present utility model. As shown in fig. 4, the driving circuit 100 includes a data buffer circuit 170 in addition to a power supply module 110, a row scanning module 120, a red light driving module 130, a green light driving module 140, a blue light driving module 150, and a light emitting diode tri-color light 160. The first end of the data buffer circuit 170 is connected to the data input interface 200, the second end of the data buffer circuit 170 is connected to the row scan module 120, the third end of the data buffer circuit 170 is connected to the red light driving module 130, the green light driving module 140 and the blue light driving module 150, and the fourth end of the data buffer circuit 170 is connected to the common anode end 111.
In the embodiment of the present utility model, data flows from the data input interface 200 into the driving circuit 100, and first passes through the data buffer circuit 170. The data buffer circuit 170 processes and buffers the incoming data, and the data is input to the line scanning module 120, and the line scanning module 120 controls the light emission of the red light 161, the green light 162, and the blue light 163 in each line direction according to the input data. Meanwhile, after the data is processed and buffered by the data buffer circuit 170, the data is input into the red light driving module 130, the green light driving module 140 and the blue light driving module 150, so that the red light driving module 130, the green light driving module 140 and the blue light driving module 150 can also control the light emission of the red light 161, the green light 162 and the blue light 163 in each column direction according to the input data.
In one embodiment of the utility model, the line scanning module comprises a decoder and a line driving chip, wherein the decoder is connected with the line driving chip and is also connected with the data buffer circuit; the first end of the row driving chip is connected with the common anode end, and the second end of the row driving chip is connected with the anode of the red light, the anode of the green light and the anode of the blue light.
In an embodiment of the present utility model, the row scan module 120 includes a decoder and a row driver chip. The decoder is connected to the data buffer circuit 170, and can translate the state of the input binary code into an output signal to represent the original meaning of the output signal. And then the translated output signals (such as pulse, high level or low level) are sent to the row driving chip by connecting with the row driving chip, so that the row driving chip can control and drive the positive electrode of the red light 161, the positive electrode of the green light 162 and the positive electrode of the blue light 163 according to the output signals.
Illustratively, the decoder may be, but is not limited to, a 74LS138 type chip. The row driving chip may be a 74HC4953 chip, but is not limited thereto.
Referring to fig. 5, fig. 5 is another circuit diagram of a driving circuit according to an embodiment of the present utility model. As shown in fig. 5, the line scanning module is connected with a common anode terminal (output V0) of the power module, the red light driving module is connected with the common anode terminal and a first voltage output terminal (output V1), the green light driving module is connected with the common anode terminal and a second voltage output terminal (output V2), and the blue light driving module is connected with the common anode terminal and the second voltage output terminal. The LED tri-color lamp comprises a plurality of red lamps, a plurality of green lamps and a plurality of blue lamps. The positive poles of the red lamps are connected with the line scanning module, and the negative poles of the red lamps are connected with the red lamp driving module. So that each red light is driven by the first negative voltage output from the first voltage output terminal. The anodes of the green lights are connected with the row scanning module, and the cathodes of the green lights are connected with the green light driving module. So that each green light is driven by the second negative voltage output from the second voltage output terminal. The positive pole of each blue lamp all is connected with the line scanning module, and the negative pole of each blue lamp all is connected with blue lamp drive module. So that each blue lamp is driven by the second negative voltage output from the second voltage output terminal. According to the utility model, each red lamp is driven by the first negative voltage, each green lamp and each blue lamp are driven by the second negative voltage, and energy consumption can be effectively saved in a voltage division driving mode.
Referring to fig. 6, fig. 6 is a schematic block diagram of a display screen according to an embodiment of the present utility model. Referring to fig. 6, an embodiment of the present utility model further provides a display screen 600, including the driving circuit 100 provided in any embodiment of the present utility model.
Because the display screen 600 provided by the embodiment of the utility model includes the driving circuit 100 provided by any embodiment of the utility model, the display screen 600 of the utility model can reduce energy consumption and cost and prolong the service life of the display screen.
The embodiments described in the embodiments of the present utility model are for more clearly describing the technical solutions of the embodiments of the present utility model, and do not constitute a limitation on the technical solutions provided by the embodiments of the present utility model, and those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present utility model are equally applicable to similar technical problems.
It will be appreciated by persons skilled in the art that the embodiments of the utility model are not limited by the illustrations, and that more or fewer steps than those shown may be included, or certain steps may be combined, or different steps may be included.
The above described apparatus embodiments are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.
The terms "first," "second," "third," "fourth," and the like in the description of the utility model and in the above figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present utility model, "at least one (item)" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided by the present utility model, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the above-described division of units is merely a logical function division, and there may be another division manner in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The preferred embodiments of the present utility model have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the embodiments of the present utility model. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the embodiments of the present utility model shall fall within the scope of the claims of the embodiments of the present utility model.
Claims (10)
1. The driving circuit is characterized by comprising a power supply module, a line scanning module, a red light driving module, a blue light driving module, a green light driving module and a light-emitting diode tri-color lamp;
the power supply module comprises a common anode terminal, a first voltage output terminal and a second voltage output terminal;
the light-emitting diode tri-color lamps comprise red lamps, green lamps and blue lamps;
the first end of the line scanning module is connected with the common anode end, and the second end of the line scanning module is connected with the positive electrode of the red light, the positive electrode of the green light and the positive electrode of the blue light;
the first end of the red light driving module is connected with the common anode end, the second end of the red light driving module is connected with the first voltage output end, and the third end of the red light driving module is connected with the negative electrode of the red light;
the first end of the green light driving module is connected with the common anode end, the second end of the green light driving module is connected with the second voltage output end, and the third end of the green light driving module is connected with the negative electrode of the green light;
the first end of the blue lamp driving module is connected with the common anode end, the second end of the blue lamp driving module is connected with the second voltage output end, and the third end of the blue lamp driving module is connected with the cathode of the blue lamp.
2. The drive circuit of claim 1, wherein the common anode terminal is configured to output a common voltage of 0V, the power module further comprising:
the power supply input end is used for accessing a first positive voltage;
the first end of the buck conversion circuit is connected with the power input end, the second end of the buck conversion circuit is connected with the common anode end, and the buck conversion circuit is used for converting the first positive voltage into a second positive voltage;
the second terminal of the buck converter circuit outputs a first negative voltage with respect to the power supply input terminal, and the common anode terminal outputs a second negative voltage with respect to the second terminal of the buck converter circuit.
3. The drive circuit of claim 2, wherein the second positive voltage is lower than the first positive voltage.
4. The drive circuit of claim 2, wherein the first negative voltage is an opposite number of differences between the first positive voltage and the second positive voltage, and the second negative voltage is an opposite number of the second positive voltage.
5. The drive circuit of claim 2, wherein the first voltage output is configured to output the first negative voltage, the first negative voltage being-3.0V to-3.2V.
6. The drive circuit of claim 2, wherein the second voltage output is configured to output the second negative voltage, the second negative voltage being-3.8V to-4.2V.
7. The drive circuit of claim 1, wherein a first rectifying and filtering circuit is connected between the first voltage output and a power ground, and a second rectifying and filtering circuit is connected between the second voltage output and the power ground.
8. The drive circuit of claim 7, wherein the first rectifying and filtering circuit comprises a plurality of first capacitors connected in parallel between the first voltage output and a power supply ground; the second rectifying and filtering circuit comprises a plurality of second capacitors which are connected in parallel between the second voltage output end and the power ground.
9. The driving circuit of claim 1, wherein a third terminal of the row scan module is connected to the second voltage output terminal.
10. A display screen comprising the drive circuit of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320873691.0U CN219716441U (en) | 2023-04-11 | 2023-04-11 | Driving circuit and display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320873691.0U CN219716441U (en) | 2023-04-11 | 2023-04-11 | Driving circuit and display screen |
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| Publication Number | Publication Date |
|---|---|
| CN219716441U true CN219716441U (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320873691.0U Active CN219716441U (en) | 2023-04-11 | 2023-04-11 | Driving circuit and display screen |
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| Country | Link |
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| CN (1) | CN219716441U (en) |
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- 2023-04-11 CN CN202320873691.0U patent/CN219716441U/en active Active
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Inventor after: Sun Qiuye Inventor after: Wu Yanjun Inventor after: Yang Shuai Inventor after: Xie Peiliang Inventor before: Sun Qiuye Inventor before: Hao Yanjun Inventor before: Yang Shuai Inventor before: Xie Peiliang |
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