TWM446474U - LED Lamp - Google Patents

Description

LED light

This creation relates to LED lighting technology, and more particularly to an LED lamp.

The existing LED lamp is composed of an LED lamp bead module, a power module and a lamp cover. The power module is composed of a transformer, an electrolytic capacitor, a resistor and the like, which has certain defects: on the one hand, the prior art The power module is composed of transformers, electrolytic capacitors, resistors and other components. The transformer is mainly composed of an electromagnetic coil, which generates magnetic field and electric radiation, so it is easy to generate heat, has a short life, and cannot be used for medical appliances susceptible to magnetic field interference. The electrolytic capacitor contains electrolyte, which has large leakage current, large error, poor stability, and rapid decline in life with temperature; therefore, the entire power module has high loss, low electrical conversion rate, short life, and maintenance. High cost and low power factor.

On the other hand, the prior art power module is composed of a transformer, an electrolytic capacitor, a resistor, and the like, and has a large volume, which causes the aluminum cover of the power module to be bulky. In the prior art, the aluminum lamp cross-sectional area of the LED tube accounts for half or more of the cross-sectional area of the lamp tube, and the illumination angle thereof is less than or equal to 180 degrees, so the illumination angle is small.

In view of this, the purpose of the creation is to provide an LED lamp, which can reduce power module loss, reduce maintenance cost, increase electrical conversion rate and improve power factor.

In order to solve the above technical problems, the technical solution provided by the present invention is: an LED lamp comprising an LED lamp bead set, a power module and a lamp cover, wherein the power module includes The rectifier bridge voltage filter circuit module and the power drive microprocessor of the flow bridge IC, wherein: the rectifier voltage doubler filter circuit module is connected to the commercial power, is used for rectifying the input alternating current into direct current, and correspondingly double voltage and filtering; The two output ends of the rectifier bridge IC are respectively connected to the power positive and negative terminals of the power driving microprocessor for outputting a constant current source to the external component according to a predetermined procedure.

In a preferred embodiment, the power-driven microprocessor is coupled to a microprocessor control module for power regulation and over-voltage protection of the power-driven microprocessor.

In a preferred embodiment, the microprocessor control module includes a transistor, wherein: a base of the transistor is respectively connected to two output ends of the rectifier bridge IC through a voltage dividing resistor; a collector of the transistor Connected to an overvoltage protection pin of the power driven microprocessor; the emitter of the transistor is coupled to a reference voltage output pin of the power driven microprocessor via a reference resistor.

In a preferred embodiment, a filter capacitor is coupled between the collector and the emitter of the transistor.

In a preferred embodiment, the power drive microprocessor is internally provided with an overheat protection module.

In a preferred embodiment, the rectification voltage filter circuit module includes a voltage doubler filter capacitor, and the voltage doubler filter capacitor is connected to the two output ends of the rectifier bridge IC.

In a preferred embodiment, an anti-surge circuit is disposed between the two output ends of the rectifier bridge IC to reduce spur current damage to the power-driven microprocessor.

In a preferred embodiment, the anti-surge circuit is a diode, an anode of the diode is connected to an output negative end of the rectifier bridge IC, and a cathode of the diode is connected to the rectifier bridge IC. The positive end of the output.

In a preferred embodiment, the LED bead component regions are grouped, and each set of LED bead is respectively coupled to a corresponding power output of the power driven microprocessor.

In a preferred embodiment, the cross-sectional area of the aluminum cover of the LED lamp of the LED lamp accounts for one-third of the cross-sectional area of the lamp, and the cross-sectional area of the lamp cover accounts for two-thirds of the cross-sectional area of the lamp.

Compared with the prior art, the main components of the rectifier bridge unit and the power driving unit in the power module of the LED lamp are semiconductor materials, and there are no components such as a transformer and an electrolytic capacitor, so that low loss, low maintenance cost, and electric power can be realized. High conversion rate and high power factor (up to 0.97). Further, since there is no relatively large-sized component such as a transformer, the volume of the aluminum cover of the lamp tube is relatively small, which helps to increase the area of the lamp cover, and the illumination angle of the lamp tube can reach 270 degrees.

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

Please refer to Figure 1 for the connection of the LED bead set in the LED lamp of this creation. The LED lamp bead set is mounted on an aluminum substrate, wherein the LED lamp bead is connected in series and parallel mode, and the sub-areas are grouped into I1~I6, and each group is respectively connected to a corresponding power output of the power-driven microprocessor in the power module. end.

Please refer to Figure 2, which shows the power module in the LED light. The power module comprises a rectification voltage doubler filter circuit module including a rectifier bridge IC (B1) and a power drive microprocessor (MCU) U1, wherein: the input terminal AC of the rectification voltage doubler filter circuit module is connected to the 220V mains through the resistors R1 and R2. V1, used to rectify the input AC power into DC power, and corresponding voltage doubler and filtering; the two output terminals V+ and V- of the rectifier bridge IC (B1) are respectively connected to the power terminal VAC of the power driving microprocessor U1 and the ground terminal GND (and connected with the state case), It is used to output a constant current source to an external component (the present LED lamp bead set) according to a predetermined procedure. The specific circuit structure of the power module will be further described below.

As shown in FIG. 2, the power driving microprocessor U1 is connected with a microprocessor control module for power regulation and overvoltage protection of the power driving microprocessor U1. The circuit structure of the microprocessor control module includes a transistor Q1, and the base thereof is connected to the two output ends of the rectifier bridge IC (B1) through the voltage dividing resistors R3, R4, and R5, respectively, and the collector and the power driving microprocessor U1 The overvoltage protection pin SHDN is connected, and the emitter is connected to the reference voltage output pin REXT of the power driving microprocessor U1 through the reference resistor R7. In addition, the base of the transistor Q1 is also externally connected to the I6 through the resistor R8, and a filter capacitor C3 is connected between the collector and the emitter.

In this embodiment, the power driving microprocessor U1 is internally provided with an overheat protection module; and the rectification voltage doubler filter circuit module includes double voltage filter capacitors C1 and C2, which are connected to the two output ends of the rectifier bridge IC (B1); An anti-surge circuit is disposed between the two output ends of the rectifier bridge IC (B1), the anti-surge circuit is a diode Z1, and an anode thereof is connected to the output negative terminal V- of the rectifier bridge IC (B1), and The cathode is connected to the output positive terminal V+ of the rectifier bridge IC (B1) to reduce the surge current damage to the power driven microprocessor U1.

As shown in Figure 2, the power module works as follows:

(1) The power supply of the external mains V1 is converted to DC DC by the rectifier bridge IC (B1), and then converted to double voltage by the double-voltage filter capacitors C1 and C2, and double-pressure filter The wave capacitors C1, C2 have a filtering effect. Then, a unidirectional diode Z1 is connected to V+ and V- at both ends of the power supply to reduce the surge current damage and improve reliability.

(2) Then the current will pass through the microprocessor control module. The microprocessor control module is composed of a resistor and a transistor Q1. The collector of the transistor Q1 is connected to the SHDN pin of the power driving microprocessor U1 to reach an overvoltage. Protective function. The power driving microprocessor U1 has an overheat protection function, and when the temperature reaches the set value, the current is stopped, and when the temperature returns to the normal value, the operation resumes.

(3) The emitter of the transistor Q1 is connected to the reference resistor R7 and the REXT pin of the power driving microprocessor U1. The REXT pin has the function of adjusting the driving power of the microprocessor U1. In addition, the collector and emitter of the transistor Q1 indirectly have a filter capacitor C3 for filtering. In addition, the emitter of the transistor Q1 is connected to the GND pin of the power driving microprocessor U1, which represents the negative or ground terminal of the DC power supply.

(4) The positive pole of the DC power supply is connected to the VAC pin of the power driving microprocessor U1. After the intelligent temperature control of the microprocessor U1 is driven and the driving power is adjusted, the constant current source is finally output. The six pins of D1 to D6 in the power driving microprocessor U1 are the output pins of the constant current source, respectively controlling the LED beads of the six regions of I1 to I6 in the first figure, thereby causing the LED lamp beads to be emitted. bright. Among them, the power drive microprocessor U1 determines the magnitude of the power that is controlled.

This creation improves the traditional power module, the main components of which are all semiconductors, without transformers and electrolytic capacitors. Since there is no transformer and electrolytic capacitor in the whole technical solution of the present invention, all components are semiconductor components, and the semiconductor components have long life and are not easily damaged, so that low loss, low maintenance cost, and high electrical conversion rate can be achieved. The power factor is high (up to 0.97).

In addition, the power module of the present invention does not use the transformer and the electrolytic capacitor in the prior art, and all components are semiconductor components, and therefore, the power module is small in size. Since the power module is small in size, the required storage space is small, and the volume of the aluminum cover of the lamp for storing the power module is reduced, and the cross-sectional area of the aluminum cover of the lamp tube accounts for one-third of the cross-sectional area of the lamp. The cross-sectional area of the PC lamp cover of the lamp tube accounts for two-thirds of the cross-sectional area of the lamp tube, so the illumination angle of the lamp tube is 270 degrees.

The above is only a preferred embodiment of the present invention. It should be noted that the above preferred embodiments should not be construed as limiting the present invention. The scope of protection of the present invention should be based on the scope of the patent application. It will be apparent to those skilled in the art that a number of improvements and modifications can be made without departing from the spirit and scope of the present invention. These improvements and refinements should also be considered as protection of the present invention.

B1‧‧‧Rectifier Bridge IC

C1, C2‧‧‧ double voltage filter capacitor

C3‧‧‧Filter Capacitor

Q1‧‧‧Optoelectronics

R1, R2‧‧‧ resistance

R3, R4, R5‧‧‧ voltage divider resistor

R7‧‧‧ reference resistor

R8‧‧‧ resistance

U1‧‧‧Power Drive Microprocessor

V1‧‧‧Power

Z1‧‧‧ diode

The first figure is the connection diagram of the LED lamp bead group of the LED lamp of the present creation; the second figure is the circuit diagram of the power module of the LED lamp of the present creation.

B1‧‧‧Rectifier Bridge IC

C1, C2‧‧‧ double voltage filter capacitor

C3‧‧‧Filter Capacitor

Q1‧‧‧Optoelectronics

R1, R2‧‧‧ resistance

R3, R4, R5‧‧‧ voltage divider resistor

R7‧‧‧ reference resistor

R8‧‧‧ resistance

U1‧‧‧Power Drive Microprocessor

V1‧‧‧Power

Z1‧‧‧ diode

Claims (10)

An LED lamp comprising an LED lamp bead set, a power module and a lamp cover, wherein the power supply module comprises a rectification voltage doubler filter circuit module and a power drive microprocessor including a rectifier bridge IC, wherein: the rectification frequency The voltage filter circuit module is connected to the mains to rectify the input AC power into DC power, and correspondingly double voltage and filter; the two output ends of the rectifier bridge IC are respectively connected to the power supply terminal of the power drive microprocessor and negative And a terminal for outputting a constant current source to the external component according to a predetermined program. The LED lamp of claim 1, wherein the power driving microprocessor is connected with a microprocessor control module for performing power regulation and overvoltage protection on the power driving microprocessor. The LED lamp of claim 2, wherein the microprocessor control module comprises a transistor, wherein: a base of the transistor is respectively connected to two output ends of the rectifier bridge IC through a voltage dividing resistor The collector of the transistor is coupled to an overvoltage protection pin of the power driven microprocessor; the emitter of the transistor is coupled to a reference voltage output pin of the power driven microprocessor via a reference resistor. The LED lamp of claim 3, wherein a filter capacitor is connected between the collector and the emitter of the transistor. The LED lamp of claim 1, wherein the power driving microprocessor is internally provided with an overheat protection module. The LED lamp of claim 1, wherein the rectification voltage filter circuit module comprises a voltage doubler filter capacitor, and the voltage doubler filter capacitor is connected to two output ends of the rectifier bridge IC. The LED lamp of any one of claims 1 to 6, wherein an anti-surge circuit is disposed between the two output ends of the rectifier bridge IC to reduce a protrusion of the power-driven microprocessor. Wave current damage. The LED lamp of claim 7, wherein the anti-surge circuit is a diode, an anode of the diode is connected to an output negative end of the rectifier bridge IC, and the diode is The cathode is connected to the positive terminal of the rectifier bridge IC. The LED lamp of claim 1, wherein the LED lamp bead component regions are grouped, and each group of LED lamp beads is respectively connected to a corresponding power output end of the power driving microprocessor. The LED lamp of claim 9, wherein the LED lamp is provided with a lamp aluminum cover and a lamp tube, and the cross-sectional area of the aluminum cover of the lamp tube accounts for one-third of the cross-sectional area of the lamp tube. The cross-sectional area of the lampshade accounts for two-thirds of the cross-sectional area of the lamp.