CN209914112U

CN209914112U - LED lamp tube with adjustable color temperature

Info

Publication number: CN209914112U
Application number: CN201920125382.9U
Authority: CN
Inventors: 蒲纪忠; 孙坚; 甘彩英
Original assignee: CH Lighting Technology Co Ltd
Current assignee: CH Lighting Technology Co Ltd
Priority date: 2019-01-24
Filing date: 2019-01-24
Publication date: 2020-01-07
Anticipated expiration: 2029-01-24

Abstract

The utility model discloses a colour temperature adjustable LED fluorescent tube, including drive circuit, colour temperature regulating circuit and have the first group LED and the second group LED of different colour temperatures, colour temperature regulating circuit is including the first branch road that has first MOS pipe, the second branch road that has the second MOS pipe and have the control switch of public end and two switch contacts, the public end of the source connection control switch of first MOS pipe and second MOS pipe, and two switch contacts are connected respectively to the grid, and first LED and second LED are connected respectively to the drain electrode. The utility model discloses a colour temperature LED disconnection or circular telegram of two sets of differences of two MOS pipes and a on-off control can realize that three grades of colour temperatures adjust, and circuit structure is simple, easily realizes that the fault rate is low.

Description

LED lamp tube with adjustable color temperature

Technical Field

The utility model relates to a LED lamps and lanterns especially relate to a colour temperature adjustable LED fluorescent tube.

Background

In order to meet different lighting needs, the color temperature of some lamps is adjustable. The CN109068451A discloses an LED panel lamp capable of adjusting color temperature and brightness, which includes an LED lamp strip, a power module, and a color temperature adjusting switch, where the LED lamp strip includes a first color temperature value LED lamp set and a second color temperature value LED lamp set, the first color temperature value LED lamp set and the second color temperature value LED lamp set are respectively formed by connecting a plurality of LED lamps with the same color temperature value in series, and the LED lamps with different color temperature values are alternately arranged on the LED lamp strip; the power supply module comprises a brightness control module for controlling the brightness of the LED panel lamp, an over-temperature protection module for protecting the over-temperature of the circuit of the LED panel lamp, an over-current protection module for protecting the over-current of the circuit of the LED panel lamp and an output short-circuit protection module for protecting the output short circuit of the LED panel lamp, wherein all the modules in the power supply module are arranged on the circuit board and are electrically connected with each other; one end of the color temperature adjusting switch is connected to the output end of the power supply module; the other end of the LED lamp set is respectively connected with the first color temperature value LED lamp set and the second color temperature value LED lamp set in series, and the first color temperature value LED lamp set and the second color temperature value LED lamp set are respectively controlled to be turned on and turned off.

For another example, CN108770136A discloses a dimming and toning LED isolated constant current driving power supply. The power supply includes: the LED constant current control device comprises a protection circuit, an EMI filter circuit, a rectification circuit, a voltage stabilizing circuit, an optical coupler isolation circuit, a control module, an LED light source, an LED color temperature adjusting circuit and an LED brightness adjusting circuit, alternating current mains supply sequentially passes through the protection circuit, the EMI filter circuit and the rectification circuit are back, bus direct current high voltage is provided, the control module sends two paths of independent PWM control signals, the LED constant current control chip dimming pin with the dimming function in the LED isolation driving circuit with the dimming function is directly controlled all the way, LED light source load dimming is carried out, the other path is converted into two complete reversed-phase PWM control signals through simple peripheral elements such as the optical coupler, the LED constant current control chip is quickly opened and closed by means of controlling an output switch tube MOS, and the lamp bead output current proportion of.

The color temperature of the LED lamp is adjusted through the integrated circuit, and the circuit design is complex.

SUMMERY OF THE UTILITY MODEL

The utility model provides a simple circuit structure's colour temperature adjustable LED fluorescent tube.

The utility model provides a colour temperature adjustable LED fluorescent tube, includes drive circuit, colour temperature regulating circuit and has the first group LED and the second group LED of different colour temperatures, colour temperature regulating circuit is including the first branch road that has first MOS pipe, the second branch road that has the second MOS pipe and the control switch who has common port and two switch contacts, and the common port of control switch is connected to the source electrode connection of first MOS pipe and second MOS pipe, and two switch contacts are connected respectively to the grid, and first LED and second LED are connected respectively to the drain electrode.

Preferably, each branch circuit comprises a voltage division circuit, the voltage division circuit is formed by connecting a first resistor and a second resistor in series, a gate of the MOS transistor is connected to a connection point of the two resistors, and a source of the MOS transistor is connected to the second resistor.

More preferably, each branch comprises a diode and a capacitor connected in parallel with the second resistor.

Preferably, the driving circuit comprises an anti-interference unit, a rectifying unit, a filtering unit and a constant current unit.

Preferably, the common terminal is grounded.

Preferably, the LED lamp tube comprises a tube body, a male end and a female end, a lamp strip is arranged inside the tube body, the tube body comprises a base tube for fixing the lamp strip and an arc tile-shaped lampshade, and the male end and the female end are provided with insertion parts matched with two ends of the base tube.

More preferably, the both sides of base pipe are provided with the draw-in groove of arranging along length direction, the both sides border card of lamp shade is gone into in the draw-in groove.

More preferably, the inner side surfaces of the male end and the female end are provided with retaining rings matched with two ends of the lampshade.

The utility model discloses a colour temperature LED disconnection or circular telegram of two sets of differences of two MOS pipes and a on-off control can realize that three grades of colour temperatures adjust, and circuit structure is simple, easily realizes that the fault rate is low.

Drawings

Fig. 1 is an exploded view of the LED lamp of the present invention.

Fig. 2 is a cross-sectional view of the LED lamp of the present invention.

Fig. 3 is a schematic circuit diagram of the LED lamp of the present invention.

Detailed Description

As shown in fig. 1 and 2, an LED lamp tube comprises a middle tube body 1, and a male end 2 and a female end 3 at two ends, wherein the tube body 1 comprises a base tube 11 and a lampshade 12, the base tube 11 is an aluminum alloy tube and is of a hollow structure, and the male end 2 and the female end 3 are respectively provided with a plug-in part 21 and a plug-in part 31 which are inserted into two ends of the base tube 11.

The side that base pipe 11 just faces the lamp shade is provided with draw-in groove 111, and lamp strip 13 installs in draw-in groove 111. The clamping grooves 110 are formed in two sides of the base tube 11, the lampshade expands along two sides of the length direction and is cylindrical, and the lampshade is clamped into the clamping grooves 110. The lampshade 12 is generally made of PC or other materials, has certain elasticity, and in order to provide certain support for the lampshade 12, the inner side surfaces of the male end 2 and the female end 3 are provided with a retaining ring 22 and a retaining ring 32 which are matched with the lampshade 12.

The lamp strip 13 is provided with two groups of LEDs which are arranged along the length direction of the tube body in a staggered mode, and the color temperatures of the two groups of LEDs are different. The tube body 1 is further provided with a switch 4 and a switch 5, wherein the switch 4 is used for controlling the lamp tube to be turned on or turned off, and the switch 5 is used for controlling the two groups of LEDs to be turned on or turned off, so that the color temperature of the whole lamp is controlled.

As shown in fig. 3, the utility model discloses the internal circuit of fluorescent tube includes drive circuit and colour temperature regulating circuit, and wherein drive circuit is including the anti-interference unit 6, the rectifier unit 7, the filter unit 8 and the constant current unit 9 that connect gradually, and these unit modules all adopt current design, and here is no longer repeated.

The utility model discloses a color temperature regulating circuit includes branch road 101 and branch road 102, and wherein branch road 101 is including the resistance R1 and the resistance R2 that concatenate, with resistance R2 parallel diode D1 and electric capacity C1 to and MOS pipe Q1, MOS pipe Q1's grid connecting resistance R1 and resistance R2's node, first group LED, source ground connection are connected to the drain electrode. The branch 102 comprises a resistor R3 and a resistor R4 which are connected in series, a diode D2 and a capacitor C2 which are connected in series with a resistor R4, and a MOS tube Q2, wherein the grid of the MOS tube Q2 is connected with the junction of the resistor R3 and the resistor R4, the drain is connected with the second group of LEDs, and the source is grounded.

The switch 5 has a common terminal a1, a switch contact a2 and a switch contact A3, wherein the switch contact a2 is connected with the gate of the MOS transistor Q2, the switch contact A3 is connected with the gate of the MOS transistor Q1, and the common terminal a1 is connected with the sources of the two MOS transistors and grounded.

When the switch 5 is switched off, the MOS tube Q1 and the MOS tube Q2 are both switched on, and the two groups of LEDs emit light; when the switch 5 is turned on to the contact A2, the MOS tube Q1 is conducted, the MOS tube Q2 is disconnected, the first group of LEDs emit light, and the second group of LEDs are turned off; when the switch 5 is turned on to the contact A3, the MOS transistor Q1 is disconnected, the MOS transistor Q2 is conducted, the first group of LEDs is turned off, and the second group emits light. Can find that the utility model discloses the third gear colour temperature can be adjusted to lamps and lanterns.

Claims

1. The utility model provides a colour temperature adjustable LED fluorescent tube, includes drive circuit, colour temperature regulating circuit and has the first group LED and the second group LED of different colour temperatures, its characterized in that, colour temperature regulating circuit is including the first branch road that has first MOS pipe, the second branch road that has the second MOS pipe and the control switch who has common terminal and two switch contacts, the common terminal of control switch is connected to the source electrode of first MOS pipe and second MOS pipe, and two switch contacts are connected respectively to the grid, and first LED and second LED are connected respectively to the drain electrode.

2. The LED lamp tube according to claim 1, wherein each branch comprises a voltage dividing circuit, the voltage dividing circuit is formed by connecting a first resistor and a second resistor in series, wherein the gate of the MOS transistor is connected with the connection point of the two resistors, and the source of the MOS transistor is connected with the second resistor.

3. The LED tube of claim 2, wherein each branch includes a diode and a capacitor connected in parallel with the second resistor.

4. The LED lamp tube according to claim 1, wherein the driving circuit comprises an anti-interference unit, a rectifying unit, a filtering unit and a constant current unit.

5. The LED tube of claim 1, wherein said common terminal is grounded.

6. The LED lamp tube according to claim 1, wherein the LED lamp tube comprises a tube body, a male end and a female end, the tube body is internally provided with the lamp strip, the tube body comprises a base tube for fixing the lamp strip and an arc tile-shaped lampshade, and the male end and the female end are provided with inserting parts matched with two ends of the base tube.

7. The LED lamp tube according to claim 6, wherein the base tube is provided at both sides thereof with locking grooves arranged in a length direction, and both side edges of the lamp cover are locked in the locking grooves.

8. The LED lamp tube according to claim 6, wherein the inner side surfaces of the male end and the female end are provided with retaining rings which are matched with the two ends of the lampshade.