CN210328059U - PCB and LED display device - Google Patents

Abstract

The utility model discloses a PCB board and LED display device, this PCB board include step-down circuit, controller and switch circuit, and this step-down circuit's input and this switch circuit are connected with this power respectively, and this step-down circuit's output is connected with this controller, and this controller is connected with this switch circuit to control this switch circuit's operating condition. The utility model discloses a with components and parts integration such as step-down circuit, controller, switch circuit on a PCB board, overcome among the prior art and respectively set up the technical problem of inconvenient production on a PCB board with control module and LED module, after the improvement, owing to only need produce a PCB board, improved production efficiency, reduced manufacturing cost, improved the production qualification rate of PCB board.

Description

PCB and LED display device

Technical Field

The utility model belongs to the technical field of the LED display technology and specifically relates to a PCB board and LED display device are related to.

Background

With the improvement of living standard of people, the functional requirements of people on the LED lamp are continuously improved from the traditional single light source to the light source with multiple colors. To meet the requirement, an LED manufacturer usually separates the control module and the LED module separately, as shown in fig. 1 and 2, places the control module and the LED module on different PCBs, and then conducts the control module and the LED module through wires and the like. This embodiment has the following disadvantages:

1. the control module and the LED module both need to adopt a PCB, so that the production efficiency is low;

2. a process is needed to conduct the intelligent module and the LED module, so that the production cost is increased;

3. the conduction process will generate a certain defect rate.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a aim at solving one of the technical problem in the correlation technique to a certain extent at least. To this end, it is an object of the embodiments of the present invention to provide a PCB board and an LED display device that are convenient to produce.

The embodiment of the utility model provides an adopted technical scheme is:

in a first aspect, an embodiment of the present invention provides a PCB, wherein the PCB includes a voltage-reducing circuit, a controller and a switch circuit, an input terminal of the voltage-reducing circuit and the switch circuit are respectively connected to a power supply, an output terminal of the voltage-reducing circuit is connected to the controller, and the controller is connected to the switch circuit to control an operating state of the switch circuit.

Wherein, this step-down circuit includes the vary voltage chip, and this vary voltage chip includes five pins: the device comprises a guide pin, a grounding pin, a feedback pin, a switch pin, an input pin and an output pin; the grounding pin and the negative electrode of the power supply are both grounded; the positive pole of the power supply is connected with one end of a first resistor, and the switch pin is connected with the other end of the first resistor; two first capacitors and two second capacitors which are connected in parallel are arranged between the anode of the power supply and the input pin; the guide pin is connected with the cathode of a first diode, and the anode of the first diode is grounded; the output pin is respectively connected with the cathode of the first diode and one end of an inductor, and the other end of the inductor is respectively connected with one end of a second resistor, one end of a third capacitor, the cathode of a second diode and the input end of the controller; the other end of the second resistor is connected with one end of the third resistor, and the other end of the third resistor, the other end of the third capacitor and the anode of the second diode are respectively grounded; the feedback pin is respectively connected with the one end of the third resistor and the other end of the second resistor.

Wherein a bypass capacitor is further arranged between the guide pin and the cathode of the first diode.

Wherein the transformer chip is MP 2459-J.

The switch circuit comprises a plurality of switch branches with the same circuit structure, and a plurality of output ends of the controller are respectively connected with the switch branches.

The switch branch circuit comprises a fourth resistor, a fifth resistor, a sixth resistor and a first MOS (metal oxide semiconductor) tube, a first output end of the controller is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with one end of the fifth resistor and a grid electrode of the first MOS tube respectively, the other end of the fifth resistor and a source electrode of the first MOS tube are connected with a negative electrode of the LED lamp bead respectively, a drain electrode of the MOS tube is connected with a positive electrode of the LED lamp bead and one end of the sixth resistor respectively, and the other end of the sixth resistor is connected with a positive electrode of the power supply.

Wherein, these five switch branch roads control a plurality of LED lamp pearls respectively, and the colour temperature of these a plurality of LED lamp pearls includes: cold light, warm light, red light, blue light or green light.

The PCB board also comprises a radio frequency module which is used for receiving an external wireless control signal and transmitting the wireless control signal to the controller so as to control the working state of the switch circuit.

Wherein, the controller is a singlechip or a programmable controller.

In a second aspect, an embodiment of the present invention provides a LED display device, which includes a PCB board and/or a LED lamp bead installed on the PCB board.

The embodiment of the utility model provides an adopt with components and parts integration such as step-down circuit, controller, switch circuit on a PCB board, overcome among the prior art and respectively set up the technical problem of inconvenient production on a PCB board with control module and LED module, after the improvement, owing to only need produce a PCB board, improved production efficiency, reduced manufacturing cost, improved the production qualification rate of PCB board.

Additionally, the utility model discloses the luminous state of a plurality of LED lamp pearls of controller control for can switch multiple light display state, satisfy the user to the variety selection demand of light source.

Drawings

FIG. 1 is a schematic diagram of a prior art PCB including an embodiment of a control module;

FIG. 2 is a schematic diagram of a prior art PCB board including an embodiment of an LED module;

fig. 3 is a schematic structural diagram of an embodiment of the PCB of the present invention;

fig. 4 is a schematic diagram of the circuit of fig. 3.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The first embodiment is as follows:

please refer to fig. 1 to fig. 3. As shown in fig. 3, the PCB board includes the control module shown in fig. 1 and the LED module shown in fig. 2. Wherein, V + and V-are respectively connected with input direct current voltage; the LED lamp comprises a first MOS tube Q1, a second MOS tube Q2, a third MOS tube Q3, a fourth MOS tube Q4 and a fifth MOS tube Q5, and is used for controlling the working states of five LED lamp beads respectively. And the X1 is a crystal oscillator and is used for forming a clock circuit matched with the U2. And the RF is a radio frequency module and is used for receiving an external wireless control signal and transmitting the wireless control signal to the controller so as to control the working state of the LED lamp bead. U2 is MCU for processing information; z1 is a voltage stabilizing diode used for stabilizing a fixed voltage value to supply power to U2; l1 is an energy storage inductor; u1 is a 3.3V conversion IC for reducing the input DC voltage of V +, V-to the voltage that U2 can use; LED1 corresponds to the C-LED of FIG. 4, namely an LED bead with cold color temperature; the LED2 corresponds to the W-LED of FIG. 4, namely an LED lamp bead with white color temperature; the LED3 corresponds to the R-LED of FIG. 4, namely a lamp bead with red color temperature; the LED4 corresponds to the G-LED of FIG. 4, namely a bead with green color temperature; the LED5 corresponds to the B-LED of FIG. 4, i.e., a bead of blue color temperature.

Specifically, referring to fig. 4, fig. 4 is a schematic diagram of the circuit of fig. 3. As shown in fig. 4, the PCB board includes a voltage step-down circuit, a controller U2, and a switching circuit. The input end of the voltage reduction circuit and the switch circuit are respectively connected with a power supply, the output end of the voltage reduction circuit is connected with the controller U2, and the controller U2 is connected with the switch circuit so as to control the working state of the switch circuit. The controller U2 may be a single chip microcomputer or a programmable controller or other controllers, and is not limited herein.

The configuration of the step-down circuit is described below.

The voltage reduction circuit comprises a transformation chip U1, and in the embodiment, the chip model of the U1 is selected to be MP 2459-J. U1 includes 5 pins, respectively: a leading pin 1-BST, a ground pin 2-GND, a feedback pin 3-FB, a switch pin 4-EN, an input pin 5-IN, and an output pin 6-SW.

The grounding pin 2-GND and the negative electrode of the power supply are grounded;

the positive electrode of the power supply is connected with one end of a resistor R1, and a switch pin 4-EN is connected with the other end of a first resistor R1;

two capacitors C1 and C2 which are connected IN parallel are arranged between the positive pole of the power supply and the input pin 5-IN;

the leading pin 1-BST is connected to the cathode of a first diode D1, the anode of which is grounded, D1;

the output pins 6 to SW are respectively connected with a cathode of a first diode D1 and one end of an inductor L1, and the other end of the inductor L1 is respectively connected with one end of a resistor R2, one end of a capacitor C3, a cathode of a diode D2 and an input end of a controller U2;

the other end of the resistor R2 is connected with one end of the resistor R3, and the other end of the resistor R3, the other end of the capacitor C3 and the anode of the diode D2 are respectively grounded;

the feedback pins 3-FB are respectively connected with one end of the resistor R3 and the other end of the resistor R2.

Further, a bypass capacitor C6 is further disposed between the leading pin 1-BST and the cathode of the first diode D1.

Further, the capacitor C3 may be replaced by a plurality of capacitors connected in parallel.

The configuration of the switching circuit is described below.

The switch circuit comprises five switch branches with the same circuit structure, and five output ends of the controller are respectively connected with the five switch branches. Five LED lamp pearls are controlled respectively to this five switch branch roads, and the colour temperature of these five LED lamp pearls includes: cold light, warm light, red light, blue light or green light.

As described in the first expense branch of fig. 4.

The switch branch comprises a resistor R4, a resistor R5, a resistor R6 and an MOS tube Q1, a first output end 3 of a controller U2 is connected with one end of a resistor R6, the other end of the resistor R6 is connected with one end of a resistor R5 and a grid of the first MOS tube Q1 respectively, the other end of a power supply R5 and a source of the first MOS tube Q1 are connected with a negative electrode of an LED lamp bead C-LED respectively, a drain of the first MOS tube Q1 is connected with the anode of the LED lamp bead C-LED and one end of the resistor R4 respectively, and the other end of the resistor R4 is connected with the anode of the power supply.

The other four switch branches have the same circuit structure with the first switch branch, and are not described again.

The PCB of this embodiment adopts an external power supply, and in addition, the PCB of this embodiment may also integrate an internal power supply module, which is not limited herein.

Example two:

the utility model also provides a LED display device, a serial communication port, include as embodiment one the PCB board and/or install LED lamp pearl on the PCB board.

To sum up, the embodiment of the utility model provides a through the adoption with components and parts integration such as step-down circuit, controller, switch circuit on a PCB board, convenient production, and the operating condition that can direct control LED lamp pearl through the controller, convenience of customers uses.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.

Claims (10)

1. The PCB is characterized by comprising a voltage reduction circuit, a controller and a switch circuit, wherein the input end of the voltage reduction circuit and the switch circuit are respectively connected with a power supply, the output end of the voltage reduction circuit is connected with the controller, and the controller is connected with the switch circuit to control the working state of the switch circuit.

2. The PCB of claim 1, wherein the voltage-dropping circuit comprises a transformer chip comprising five pins: the device comprises a guide pin, a grounding pin, a feedback pin, a switch pin, an input pin and an output pin;

the grounding pin and the negative electrode of the power supply are both grounded;

the positive electrode of the power supply is connected with one end of a first resistor, and the switch pin is connected with the other end of the first resistor;

two first capacitors and two second capacitors which are connected in parallel are arranged between the anode of the power supply and the input pins;

the guide pin is connected with the cathode of a first diode, and the anode of the first diode is grounded;

the output pin is respectively connected with the cathode of the first diode and one end of an inductor, and the other end of the inductor is respectively connected with one end of a second resistor, one end of a third capacitor, the cathode of the second diode and the input end of the controller;

the other end of the second resistor is connected with one end of a third resistor, and the other end of the third resistor, the other end of the third capacitor and the anode of the second diode are respectively grounded;

the feedback pin is connected to the one end of the third resistor and the other end of the second resistor, respectively.

3. The PCB board of claim 2, wherein a bypass capacitor is further disposed between the guide pin and the cathode of the first diode.

4. The PCB board of claim 2, wherein the transformer chip is MP 2459-J.

5. The PCB board of any one of claims 1 to 4, wherein the switch circuit comprises a plurality of switch branches with the same circuit structure, and a plurality of output terminals of the controller are respectively connected with the plurality of switch branches.

6. The PCB board of claim 5, wherein the switch branch comprises a fourth resistor, a fifth resistor, a sixth resistor and a first MOS (metal oxide semiconductor) tube, the first output end of the controller is connected with one end of the fourth resistor, the other end of the fourth resistor is respectively connected with one end of the fifth resistor and the grid electrode of the first MOS tube, the other end of the fifth resistor and the source electrode of the first MOS tube are respectively connected with the negative electrode of the LED lamp bead, the drain electrode of the MOS tube is respectively connected with the positive electrode of the LED lamp bead and one end of the sixth resistor, and the other end of the sixth resistor is connected with the positive electrode of the power supply.

7. The PCB board of claim 5, wherein the plurality of switch branches respectively control a plurality of LED lamp beads, and the color temperature of the plurality of LED lamp beads comprises: cold light, warm light, red light, blue light or green light.

8. The PCB board of claim 1, further comprising a radio frequency module for receiving an external wireless control signal and transmitting the wireless control signal to the controller to control the operating state of the switch circuit.

9. The PCB board of claim 1, wherein the controller is a single chip or a programmable controller.

10. An LED display device, comprising the PCB board of any one of claims 1 to 9 and/or LED lamp beads mounted on the PCB board.

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