CN201875487U

CN201875487U - Injection molding type constant-current LED module

Info

Publication number: CN201875487U
Application number: CN2010205963830U
Authority: CN
Inventors: 李忠训
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-11-08
Filing date: 2010-11-08
Publication date: 2011-06-22
Anticipated expiration: 2020-11-08

Abstract

The utility model discloses an injection molding type constant-current LED module, which belongs to the technical field of electronics. The injection molding type constant-current LED module comprises an outer casing, a printed circuit board, an LED string light, a positive wire, a negative wire, a constant-current driver, a resistor and a capacitor. A negative electrode of the LED string light is connected with an input end of the constant-current driver; an output end of the LED string light is grounded; a reference end of the LED string light is connected with the resistor; a negative electrode of the LED string light is connected with the capacitor in parallel and grounded; the aluminum-based printed circuit board is provided with a through hole; the outer casing is in an injection molding structure; and the outer casing together with the printed circuit board forms a bar-type module. Current sharing of LEDs of the injection molding type constant-current LED module is uniform, a front module and a rear module are uniform in brightness, the light emitting efficiency of the LEDs is high, and the service life of the LED module is prolonged. The LED module can be operated under ultralow voltage, is fine in heat dissipation and waterproofing performances, thin in thickness and exquisite in appearance. A power connecting line adopts a lateral outlet mode, so that the line is prevented from shading light emitted by the LEDs. The printed circuit board is provided with the through hole to facilitate installation and fixation.

Description

Injection moulding formula constant current LED module

Affiliated technical field

The utility model relates to the LED lamp, and especially the LED module belongs to electronic technology field.

Background technology

At present, the LED module is exactly that LED (light emitting diode) is encapsulated by certain regularly arranged together again, adds the product that some water-proofing treatment are formed.Product in the market is the constant voltage type, just has only resistance except LED substantially on the circuit, and is on the low side or be connected in series when long at voltage, voltage attenuation will appear in the LED module of afterbody, causes the LED electric current less than normal, and brightness is not enough, and efficient is low, influences result of use.Adopt the mode of bonding wire on printed substrate (PCB) in addition, it is luminous to cause wire rod to block LED; No cooling measure influences service life; Thickness is thicker, is restricted in the use.

The utility model content

In order to overcome the above-mentioned deficiency of existing LED module, the utility model provides a kind of external voltage fluctuations that is not subjected to, the thin type LED module that input current is constant.

The technical scheme that its technical problem that solves the utility model adopts is: injection moulding formula constant current LED module, comprise shell, printed substrate, LED lamp string, positive wire, negative wire, also comprise constant-flow driver, resistance and electric capacity, the negative pole of LED lamp string is connected with the input of constant-flow driver, its output head grounding, the reference edge connecting resistance; The negative pole shunt capacitance ground connection of LED lamp string; Printed substrate is aluminium base printed substrate, which is provided with through hole; Shell is an injection structure, constitutes the bar shaped module with printed substrate.

The beneficial effects of the utility model are, every paths of LEDs current sharing unanimity, and front and back module brightness unanimity, LED luminous efficiency height, and prolonged service life of LED module.The LED module can be worked under ELV.As long as assurance input voltage over the ground between the 10V, then can guarantee the constant current of LED lamp string at 1.35V.Printed substrate adopts the aluminium base material, is more conducive to the LED heat radiation.Shell is an injection structure, and water resistance is higher; Thickness only is 5mm, exquisite appearance; Electric power connection line adopts the side outlet method, has avoided wire rod to block the luminous phenomenon of LED; Be provided with through hole, convenient installation and fixing.

Description of drawings

Fig. 1 is the utility model PCB structural representation;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the upward view of Fig. 1;

Fig. 4 is the utility model circuit theory diagrams;

Fig. 5 is the utility model front view;

Fig. 6 is the B-B cutaway view of Fig. 5;

Fig. 7 is the upward view of Fig. 5;

Fig. 8 is the rearview of Fig. 5.

The specific embodiment

Below in conjunction with embodiment the utility model is further specified.

As Fig. 1-8, injection moulding formula constant current LED module comprises shell 1, printed substrate 2, LED lamp string Dn, positive wire M, negative wire N, also comprises constant-flow driver U, resistance R and capacitor C, the negative pole of LED lamp string Dn and the input U of constant-flow driver U _IConnect its output U _OGround connection, reference edge U _RConnecting resistance R; The negative pole shunt capacitance C ground connection of LED lamp string Dn; Printed substrate 2 is aluminium base printed substrate, which is provided with through hole 3; Shell 1 is an injection structure, constitutes the bar shaped module with printed substrate 2.

Constant-flow driver U is module LC1912.LED lamp string Dn is in series by three LED lamp pearl D.LED lamp pearl D is 5050 type Surface Mount LED lamp pearls.The brightness height, lighting angle is big.

Positive wire M, negative wire N are connected by solder joint 4 at the both sides of printed substrate 2 cabling.

LC1912 is the LED constant-flow driver of a ultra-low operating voltage, is a circuit that drives design specially at the lower multi-string LED of input voltage.Its constant current accuracy is 2%, and temperature stability is very good, and current precision is higher than the 5-10% of general constant-flow driver.The LC1912 application circuit is very simple, only needs little electric capacity and output to set resistance, and peripheral cost does not almost have.This can be made on the very little circuit board with LED paster lamp string together as small SOT23-3 encapsulation.

When driving LED, adopt three LED lamps of direct current crimping string, the negative terminal of LED lamp string meets the input U of LC1912 then _I, as long as guarantee input U _IVoltage over the ground between the 10V, then can guarantee the constant current of LED lamp string at 1.35V.The electric current that drives can freely be set, and setting means is at input U _IConnect a resistance R over the ground, if the setting drive current is 20mA, then this resistance is 1.2V/20mA=60ohm, if the setting drive current is 60mA, then this resistance is 1.2V/60mA=20ohm.

Claims

1. injection moulding formula constant current LED module, comprise shell (1), printed substrate (2), LED lamp string (Dn), positive wire (M), negative wire (N), it is characterized in that, also comprise constant-flow driver (U), resistance (R) and electric capacity (C), the input (U of the negative pole of LED lamp string (Dn) and constant-flow driver (U) _I) connect its output (U _O) ground connection, reference edge (U _R) connecting resistance (R); Negative pole shunt capacitance (C) ground connection of LED lamp string (Dn); Printed substrate (2) is aluminium base printed substrate, which is provided with through hole (3); Shell (1) is an injection structure, constitutes the bar shaped module with printed substrate (2).

2. injection moulding formula constant current LED module according to claim 1 is characterized in that described constant-flow driver (U) is the LC1912 module.

3. injection moulding formula constant current LED module according to claim 1 is characterized in that described LED lamp string (Dn) is in series by three LED lamp pearls (D).

4. injection moulding formula constant current LED module according to claim 3 is characterized in that, described LED lamp pearl (D) is 5050 type Surface Mount LED lamp pearls.