CN213073193U

CN213073193U - LED lamp working circuit

Info

Publication number: CN213073193U
Application number: CN202021865134.7U
Authority: CN
Inventors: 李长春
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-04-27
Anticipated expiration: 2030-08-31

Abstract

The utility model provides a working circuit of LED lamp, which comprises a driving power supply for converting commercial power into direct current, wherein the positive pole of the driving power supply is connected with the negative pole of the driving power supply through a series LED welded on an aluminum-based lamp plate in sequence; the ground wire of the commercial power is connected with the shell ground of the lamp and the aluminum base of the aluminum base lamp panel; the LED lamp also comprises an electric capacity Cx, and the electric capacity Cx is arranged between the anode of the direct-current voltage for supplying power to the lamp beads on the LED lamp panel and the shell ground of the lamp. The utility model discloses lie in that after user control closed LED lamps and lanterns, can thoroughly turn off, no longer have the phenomenon of shining a little to exist.

Description

LED lamp working circuit

Technical Field

The utility model relates to a LED field, in particular to LED lamps and lanterns working circuit.

Background

At present, an LED lamp has a working circuit block diagram of the LED lamp as shown in fig. 1, a driving power adapter is used to convert commercial power AC120/230V into direct current, LED lamps welded on a lamp panel are connected in series at two ends of a driving power supply, the direct current voltage output by the driving power supply is designed according to the number of the LED lamp beads connected in series, an electronic switch is generally arranged on a circuit connecting the driving power supply and the LED lamp beads in series, whether the LED lamp beads connected in series are powered up to work is controlled by the electronic switch, and in addition, a housing of the lamp and an LED circuit board are respectively connected with a ground wire of the commercial power.

However, the existing LED lamp, especially the intelligent LED lamp shown in fig. 1, has a problem that the lamp cannot be turned off, that is, the LED lamp still has a phenomenon of being slightly bright after the lamp is turned off, and the customer experience is very bad when the lamp is used at night, which often causes customer complaints. The problem puzzles the industry of the LED lamp for many years, and in order to avoid the problem, part of manufacturers change a circuit board (lamp panel for short) welded with an LED lamp bead patch into a glass fiber board during design, but the glass fiber board has very poor heat dissipation performance, the temperature of an LED light-emitting chip is 10-20 ℃ higher than that of an aluminum substrate, the service life of the LED is greatly influenced, and the overall temperature rise design and the service life of the LED lamp are restricted.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the not enough of the phenomenon that still exists slightly bright after current LED lamps and lanterns are closed, provide a LED lamps and lanterns working circuit.

The utility model discloses realize that its technical purpose technical scheme is: a working circuit of an LED lamp comprises a driving power supply for converting commercial power into direct current, wherein the positive electrode of the driving power supply sequentially passes through series LEDs welded on an aluminum-based lamp panel to the negative electrode of the driving power supply; the ground wire of the commercial power is connected with the shell ground of the lamp and the aluminum base of the aluminum base lamp panel; the LED lamp further comprises a capacitor Cx, and the capacitor Cx is arranged between the positive electrode of the direct current driving power supply and the shell ground of the lamp.

Further, in the above LED lamp operating circuit, the capacitor Cx is a capacitor in different packaging forms including, but not limited to, an ampere rule Y capacitor, a chip capacitor, and the like.

The utility model discloses lie in that after user control closed LED lamps and lanterns, can thoroughly turn off, no longer have the phenomenon of shining a little to exist.

Thereby solved lamps and lanterns producer design and forced the glass fiber board that selects heat dispersion not good greatly influence LED lamps and lanterns life's problem because of this problem point, through the utility model discloses a method can use the better aluminium base board of heat dispersion, has improved the design life of LED lamps and lanterns by a wide margin.

The problem of long-term customer complaints of unlightness after turning off of LED lamp manufacturers is solved, the pain of customers is solved, and the customer experience satisfaction is improved.

The solution is simple and low in cost, the common capacitance is less than 0.05 yuan, and the safety capacitance is 0.1-0.3 yuan.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a working circuit diagram of a current intelligent LED lamp.

Fig. 2 is the utility model discloses embodiment 1 intelligence LED lamps and lanterns's working circuit diagram.

Detailed Description

The embodiment is a working circuit of an intelligent LED lamp, as shown in fig. 2, a capacitor (including capacitors in different packaging forms such as an ampere-rated Y capacitor and a chip capacitor) is added between the positive electrode of the dc voltage supplied by the lamp bead on the LED PCB lamp panel and the housing ground, wherein the lamps meeting the certification standard require the ampere-rated Y capacitor, and the lamps not requiring certification can select a common capacitor. The capacitance is based on a value which can enable the LED not to generate micro-brightness any more, in the physical example, the common capacitance of the patch exceeds 4nF, and the micro-brightness can be completely eliminated when the safety capacitance exceeds 6 nF.

Description of the lamp range of the embodiment: the LED lamp with the ground wire or the metal shell without the ground wire is connected with the ground when being installed, and comprises a common type and an intelligent type, wherein the intelligent LED lamp comprises non-mechanical switch control such as mobile phone app and a remote controller. A capacitor is added between the positive electrode of the direct-current voltage for supplying power to the lamp beads on the LED PCB lamp panel and the shell ground. Type and value of capacitance applied: the capacitance value of the capacitor in different packaging forms including but not limited to an ampere rule Y capacitor, a patch capacitor and the like is not limited, and the capacitance value is larger than the critical value to play a role depending on that the capacitive reactance voltage division does not generate a slightly bright value after the capacitor is connected in parallel with the LED direct-current voltage anode and the shell ground parasitic capacitor.

In this embodiment, 1 capacitor is connected in parallel to the housing ground at the positive electrode of the LED direct current, so that the impedance of the positive electrode to the ground is reduced, and the high-frequency ripple voltage of the positive electrode is reduced, so that the LED cannot be turned on to emit bright light.

And (3) verification: (a) by careful observation, the LED is slightly bright, accompanied by a slight flicker of about 2Hz, which is consistent with the period described in the figures for high frequency operation of the standby transformer.

(b) After 1 capacitor is added according to the method, the micro-brightness phenomenon is eliminated, and the capacitor is taken down, so that the micro-brightness phenomenon returns to the original state. The method is proved to be effective by a plurality of lamps and a plurality of groups of experiments.

Claims

1. A working circuit of an LED lamp comprises a driving power supply for converting commercial power into direct current, wherein the positive electrode of the driving power supply sequentially passes through series LEDs welded on an aluminum-based lamp panel to the negative electrode of the driving power supply; the method is characterized in that: the ground wire of the commercial power is connected with the shell ground of the lamp and the aluminum base of the aluminum base lamp panel; the LED lamp also comprises an electric capacity Cx, and the electric capacity Cx is arranged between the anode of the direct-current voltage which supplies power to the lamp beads on the LED PCB lamp panel and the shell ground of the lamp.

2. The LED lamp operating circuit of claim 1, wherein: the capacitor Cx is a capacitor in different packaging forms including but not limited to a safety Y capacitor, a patch capacitor and the like.