CN211630448U

CN211630448U - Three-section dimming LED soft lamp strip

Info

Publication number: CN211630448U
Application number: CN202020016299.0U
Authority: CN
Inventors: 刘达权; 丁国红; 陈锡鸿
Original assignee: Jiangmen Jianglei Photoelectric Technology Co ltd
Current assignee: Jiangmen Jianglei Photoelectric Technology Co ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-10-02
Anticipated expiration: 2030-01-03

Abstract

A three-section dimming LED soft lamp belt is provided with a transparent outer skin, a transparent core wire is wrapped in the outer skin, a circuit board is wrapped in the core wire, a plurality of LED lamp beads are welded on the circuit board, a dimming control chip is further arranged on the circuit board and provided with a constant current output port capable of outputting multistage current, the LED lamp beads are connected in series to form an LED series unit, and the negative electrodes of the LED series units are connected to the constant current output port. Because the circuit board is provided with the dimming control chip, the dimming control chip is provided with a constant current output port capable of outputting multistage current, and the cathode of the series unit is connected to the constant current output port; therefore, the utility model discloses it does not need special dimmer switch or segmentation dimmer to adjust luminance, uses ordinary switch to operate, has advantages such as with low costs and installation are simple.

Description

Three-section dimming LED soft lamp strip

Technical Field

The utility model relates to a LED lamps and lanterns specifically disclose a three-section soft lamp area of adjusting luminance LED.

Background

The dimming mode of the existing LED lamp mainly comprises two modes of stepless dimming and segmented dimming. The electrodeless dimming needs to be provided with a special electrodeless dimmer switch, so that the cost is high and the use is inconvenient; the sectional dimming requires installation of a sectional dimmer, so that the cost is high, and the installation is complex due to the need of professional electrician installation.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a dimmable LED lamp with low cost, simple installation and convenient use, aiming at the problems in the prior art.

For solving the prior art problem, the utility model discloses a three-section LED soft light area of adjusting luminance has transparent crust, and the parcel has transparent heart yearn in the crust, and the parcel has the circuit board in the heart yearn, and the welding has many LED lamp pearls on the circuit board, still be provided with the light control chip on the circuit board, the light control chip has the constant current output port of exportable multistage current, LED series unit is constituteed to a plurality of LED lamp pearl series connection, a plurality of LED series unit's negative pole is connected to constant current output port.

The utility model has the advantages that: the utility model discloses because be provided with the light control chip in the circuit board, the light control chip has the constant current output port of exportable multistage electric current, the negative pole of series connection unit is connected to constant current output port. Therefore, the utility model discloses it does not need special dimmer switch or segmentation dimmer to adjust luminance, uses ordinary switch to operate, has advantages such as with low costs and installation are simple.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the circuit structure of the present invention.

Detailed Description

For further understanding of the features and technical means, as well as the specific objects and functions of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1. The utility model provides a three-section LED soft lamp area of adjusting luminance, has transparent crust 1, and the parcel has transparent heart yearn 2 in the crust, and the parcel has circuit board 3 in the heart yearn 2, and the welding has many LED lamp pearls 4 on the circuit board 3. L/N power supply leads 21 are embedded at two sides of the core wire 2, and the circuit board 3 is electrically connected to the L/N power supply leads 21 through winding wires 22.

Referring to fig. 2, a three-section dimming LED soft light strip circuit structure. The plurality of LED beads 4 are electrically connected in a manner that two LED beads 4 are connected in parallel to form a parallel module 41, and a plurality of the parallel modules 41 are connected in series to form an LED series unit 40. The utility model discloses a rectifier circuit can set up in external drive power supply, also can set up on circuit board 3, the utility model discloses preferred the latter. Specifically, a patch rectifier bridge 5 is arranged on the circuit board 3, the input end of the patch rectifier bridge 5 can be connected with 220V or 110V alternating current mains supply, and the output end of the patch rectifier bridge 5 is connected with a dimming control chip 6 and the LED series unit 40. The pin specification of the dimming control chip 6 is shown in the following table:

pin name	Description of the invention
		VDD	Chip analog power port
VPP	Chip digital power port
		S1	Current detection port I
S2	Current detection port two
		D2	Constant current output port I
D1	Constant current output port two
		NC	Hollow foot
VIN	Chip power supply port
		GND	Cathode (bottom heat radiation)

The VDD pin and the VPP pin of the dimming control chip 6 are connected to the negative electrode of the patch rectifier bridge 5 through a capacitor C1 and a capacitor C2, respectively. The capacitor C1 is used for controlling the delay time of the first time of the lamp tube opening, the capacitor C2 is used for controlling the dimming time sequence, and when the voltage of the VPP pin rises to 3V or above, the digital logic is in a normal working state; when the voltage of the VPP pin is reduced to be below 2.6V, the digital logic is automatically cleared, so that the dimming control chip 6 is in an initial state. The dimming control chip is also provided with an S1 pin and an S2 pin, the S1 pin is connected to the negative pole of the patch rectifier bridge 5 through a resistor R1 and a resistor R2, the S2 pin is connected to the negative pole of the patch rectifier bridge 5 through a resistor R2, and the resistor R1 and the resistor R2 are used for adjusting output currents of the D1 pin and the D2 pin. The output currents of the D1 pin and the D2 pin can be divided into three stages from large to small, specifically I₁＝1/R2，I2＝0.5/R2，I ₃1/(R1+ R2). The D1/D2 pin is connected to the cathode of the LED series unit 40, the D1 pin or D2 pin of the present invention can be connected to the same LED series unit 40 after being combined with the LED series unit 40 or the D1 pin and the D2 pin respectively. The positive pole of the patch rectifier bridge 5 is connected to the VIN pin through a resistor R3, and the resistor R3 is used for adjusting the input power of the dimming control chip 6. The GND pin is connected to the negative pole of the patch rectifier bridge 5. The anode of the LED series unit 40 is connected to the anode of the patch rectifier bridge 5. The L/N input ends of the patch rectifier bridges 5 are respectively connected with an L/N power supply lead. In order to eliminate the stroboscopic effect of the light-emitting diode, the output end of the patch rectifier bridge 5 is further connected with a filter circuit 7, and the filter circuit 7 comprises an electrolytic capacitor C3 and a resistor R4 which are connected in parallel, and a diode D1 which is connected with the electrolytic capacitor C3 and the resistor R4 in series.

The utility model discloses a control principle is: the conduction current of the D1 pin and the D2 pin is controlled by the internal logic of the dimming chip 6, and when the input voltage is switched on and off, the current-limiting reference voltage is controlled by the internal logic control module of the dimming control chip 6, so that the current flowing through the LED is changed, the light intensity of the LED is dynamically adjusted, and the purpose of dimming is achieved. Specifically, when the power switch on the power wire L/N is turned on for the first time, the dimming control chip 6 supplies power, and the VDD pin detects that the capacitor C1 is fully charged and then controls the LED series unit 40 to light up, at this time, the output currents of the D1 pin and the D2 pin are I₁The delay time for the LED series unit 40 to be turned on is controlled by the capacitance of the capacitor C1. When the power switch is opened and closed for the first time, whether the opening and closing operation interval time belongs to the time set by the program is detected through the charging and discharging time of the capacitor C2, and if the opening and closing operation interval time belongs to the time set by the program, the power switch is switched to I₂(ii) a If the time interval is less than the interval time, the switching is not carried out, if the time interval is more than the interval time, the digital logic is automatically cleared, and the IC returns to the initial state. By analogy, the output current sequence is I₁To I₂To I₃To I₁And (5) repeatedly circulating.

When in specific application, the utility model I₁Set to 100% brightness, I₂Set to 50% brightness, I₃The luminance was set to 20%, and the charge and discharge time of the capacitor C2 was set to 5 seconds. Namely, when the switch is closed for the first time, the LED series unit 40 has 100% brightness, the switch is opened and closed once within 5 seconds, the LED series unit 40 is switched to 50% brightness, and the like until the brightness of 20% returns to 100% brightness.

The utility model is characterized in that a patch rectifier bridge is arranged in the circuit board, the output end of the patch rectifier bridge is connected with a dimming control chip, the dimming control chip is provided with a constant current output port capable of outputting multistage current, the cathode of the LED series unit is connected to the constant current output port, and the anode of the LED series unit is connected to the anode of the patch rectifier bridge; therefore, the utility model discloses it does not need special dimmer switch or segmentation dimmer to adjust luminance, uses ordinary switch to operate, has advantages such as with low costs and installation are simple.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a three-section LED soft lamp area of adjusting luminance has transparent crust, and the parcel has transparent heart yearn in the crust, and the parcel has the circuit board in the heart yearn, and the welding has many LED lamp pearls on the circuit board, its characterized in that: the LED dimming control circuit is characterized in that the circuit board is also provided with a dimming control chip, the dimming control chip is provided with a constant current output port capable of outputting multistage currents, the LED lamp beads are connected in series to form an LED series unit, and the cathodes of the LED series units are connected to the constant current output port.

2. The three-segment dimming LED soft lamp strip according to claim 1, characterized in that: and the circuit board is also provided with a patch rectifier bridge, and the output end of the patch rectifier bridge is connected with the dimming control chip and the LED series unit.

3. A three-segment dimming LED soft strip according to claim 2, wherein: the dimming control chip is also provided with an analog power port and a digital power port, and the analog power port and the digital power port are respectively connected to the negative electrode of the patch rectifier bridge through capacitors.

4. A three-segment dimming LED soft strip according to claim 2, wherein: the dimming control chip is further provided with a first current detection port and a second current detection port, and the first current detection port and the second current detection port are respectively connected to the negative electrode of the patch rectifier bridge through resistors.