CN211557576U

CN211557576U - LED lamp

Info

Publication number: CN211557576U
Application number: CN202020202930.6U
Authority: CN
Inventors: 穆金林
Original assignee: Hangzhou Yida Lighting Co ltd
Current assignee: Hangzhou Yida Lighting Co ltd
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-09-22
Anticipated expiration: 2030-02-24

Abstract

The utility model relates to the technical field of lamps and lanterns, a LED lamp is disclosed, which comprises a voltage input unit, a rectifying unit, a driving unit, a current detecting unit, a lamp source display unit and a protection unit, wherein the voltage input unit provides voltage for the whole LED lamp; the current rectified by the rectifying unit is transmitted to the current detecting unit; the current detection unit is connected with the driving unit and used for transmitting the current after current detection to the driving unit; the driving unit transmits the current to the protection unit, the protection unit protects the current and feeds the current back to the rectification unit, and the driving unit outputs the output current to the lamp source display unit; the utility model can adjust and color the LED lamp by adopting the constant current LED driving chip for adjusting and color; through the regulation to resistance R4 and zener diode D31 in the protection unit for the LED lamp both can be controlled through neon bulb pilot lamp switch, also can be controlled through LED pilot lamp switch, thereby has saved the switching cost.

Description

LED lamp

Technical Field

The utility model relates to the technical field of lighting fixtures, especially, relate to a LED lamp.

Background

At present, linear power supplies are mostly adopted for controlling switches of LED lamps in the market for color mixing and dimming, and neon bulbs are connected in series in some switches for indicating lamps and indicating the switches through the neon bulbs. However, the normal operation of the switch needs higher voltage, when the voltage is in an undervoltage state, the switch indicated by the neon bulb lamp cannot control the LED lamp, and the LED lamp cannot normally operate.

As in the patent headings: the utility model provides a LED lamp plate and LED lamp, application number: CN201820303409.4, application date: 2018-03-05, an LED lamp panel and an LED lamp, wherein a plurality of lamp bead groups are arranged on the substrate. The lamp bead groups are arranged on the substrate at intervals to form a circle with the center of the substrate as the center of circle, and the lamp beads in the lamp bead groups are all located on the circle. In the using process, if only one light source with the color temperature value is switched on, the luminous lamp beads are distributed on the circular ring no matter what the color temperature value of the switched-on light source is, so that the emitted light has the same effect. When obtaining the light that needs through the colour mixture, based on lamp pearl next-door neighbour's setting among the lamp pearl group to and lamp pearl group distributes on the circle, make the effect preferred of colour mixture has promoted the effect that the colour temperature was adjusted on the whole. However, in the prior art, the LED lamp panel and the LED lamp may fail to operate when the switch of the neon bulb indicator lamp is operated due to the absence of a better protection circuit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the unable fine different pilot lamp switches that are suitable for of LED lamp among the prior art, can be suitable for neon bulb pilot lamp switch promptly and can be suitable for the shortcoming of LED pilot lamp switch again, provide the LED lamp that has suitable 2 kinds of pilot lamp switches concurrently.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

an LED lamp comprises a voltage input unit, a rectifying unit, a driving unit, a current detection unit, a lamp source display unit and a protection unit, wherein the voltage input unit is connected with the rectifying unit and provides voltage for the LED lamp;

the rectifying unit is connected with the current detecting unit and used for transmitting the rectified current to the current detecting unit;

the current detection unit is connected with the driving unit and used for transmitting the current after current detection to the driving unit;

the driving unit is connected with the protection unit and the lamp source display unit, the driving unit transmits current to the protection unit, the protection unit protects the current and feeds the current back to the rectification unit, the driving unit outputs the output current to the lamp source display unit, and the lamp source display unit displays light.

Preferably, the driving unit adopts a constant current LED driving chip with dimming and color modulation. The chip model is BP5818DJ, and its port includes: the power supply circuit comprises a power supply port VCC, a selection control port SEL, current sampling ports CS1 and CS2, a power supply port VIN and constant current output ports D1 and D2.

Preferably, the protection unit comprises a resistor R4 and a zener diode D31, the resistor R4 is connected in series with the zener diode, the resistor R4 is an adjustable resistor, and the zener diode is an adjustable zener diode; one end of a voltage stabilizing diode in the protection unit is connected with the resistor R4, and the other end of the voltage stabilizing diode is connected with VIN of the driving chip;

preferably, the resistor R4 is an adjustable resistor and the zener diode is an adjustable zener diode, which is adjusted according to the input power.

When the LED lamp control switch adopts a neon bulb display lamp switch, the voltage supplied to the VIN end is in an undervoltage state, and the LED lamp cannot normally display. The input voltage of the VIN terminal is increased by adding the protection unit at the VIN pin terminal, and the LED lamp is normally started; meanwhile, the current flowing through the resistor R4 and the voltage stabilizing diode D31 through the protection unit is reduced, so that the instant current is effectively prevented from breaking down the chip due to overlarge current, and the driving chip is protected.

Preferably, the rectifying unit comprises 4 rectifying diodes, the 4 rectifying diodes being bridged into a bridge stack BD 1. The input ac voltage is converted into a dc voltage to be supplied to the entire LED lamp.

Preferably, the current detection unit comprises a resistor Rs1, a resistor Rs2, a resistor Rs3 and a resistor Rs4, the resistor RS1 and the resistor RS2 are connected in parallel to form a first resistor unit, the resistor RS3 and the resistor RS4 are connected in parallel to form a second resistor unit, the first resistor unit and the second resistor unit are connected with an interface of the driving unit, and the resistor RS1, the resistor RS2, the resistor RS3 and the resistor RS4 are all adjusting resistors.

The current detection unit outputs a fixed current to the driving chip; the first resistance unit is connected with a current sampling port CS1 of the driving chip, and the second resistance unit is connected with a current sampling port CS2 of the driving chip; when the LED lamp is subjected to color modulation, the first resistance unit and the second resistance unit are grounded in parallel; when the LED lamp is dimmed, the first resistor unit and the second resistor unit are connected in series to be grounded.

Preferably, the lamp source display unit comprises at least 14 LED lamp beads, and the LED lamp beads are connected with the output port of the driving unit.

Preferably, a diode D32 is provided between the rectifying unit and the lamp source display unit, a diode D32 is connected in series with the lamp source display unit, and a diode D32 is used for quick start of the lamp source display unit.

Preferably, a filter unit is connected in series between the diode D32 and the lamp source display unit, the filter unit comprises a capacitor C1, a resistor R1 and a resistor R2, and two ends of the capacitor C1 which are connected in parallel after the resistor R1 and the resistor R2 are connected in series are used for discharging energy of the capacitor C1, so that the LED lamp in 1S after the switch is turned off is completely turned off.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect: the utility model can adjust and color the LED lamp by adopting the constant current LED driving chip for adjusting and color; through the regulation to resistance R4 and zener diode D31 in the protection unit for the LED lamp both can be controlled through neon bulb pilot lamp switch, also can be controlled through LED pilot lamp switch, thereby has saved the switching cost.

Drawings

Fig. 1 is a view of the present invention.

Fig. 2 is a color matching circuit diagram of the present invention.

Fig. 3 is a circuit diagram of the present invention.

The names of the parts indicated by the numerical references in the above figures are as follows: the device comprises a voltage input unit 1, a rectifying unit 2, a current detecting unit 3, a lamp source display unit 4, a driving unit 5 and a protection unit 6.

Detailed Description

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

Example 1

The driving unit adopts a constant current LED driving chip with dimming and color mixing functions. The chip model is BP5818DJ, and its port includes: the power supply circuit comprises a power supply port VCC, a selection control port SEL, current sampling ports CS1 and CS2, a power supply port VIN and constant current output ports D1 and D2.

The protection unit comprises a resistor R4 and a voltage stabilizing diode D31, the resistor R4 is connected with the voltage stabilizing diode in series, the resistor R4 is an adjustable resistor, and the voltage stabilizing diode is an adjustable voltage stabilizing diode; one end of a voltage stabilizing diode in the protection unit is connected with the resistor R4, and the other end of the voltage stabilizing diode is connected with VIN of the driving chip;

the resistor R4 is an adjustable resistor and the zener diode is an adjustable zener diode, which is adjusted according to the input power.

The rectifying unit comprises 4 rectifying diodes, and the 4 rectifying diodes are bridged into a bridge stack BD 1. The input ac voltage is converted into a dc voltage to be supplied to the entire LED lamp.

The current detection unit comprises a resistor RS1, a resistor RS2, a resistor RS3 and a resistor RS4, the resistor RS1 and the resistor RS2 are connected in parallel to form a first resistor unit, the resistor RS3 and the resistor RS4 are connected in parallel to form a second resistor unit, the first resistor unit and the second resistor unit are connected with an interface of the driving unit, and the resistor RS1, the resistor RS2, the resistor RS3 and the resistor RS4 are all adjusting resistors.

The current detection unit outputs a fixed current to the driving chip; the first resistance unit is connected with a current sampling port CS1 of the driving chip, and the second resistance unit is connected with a current sampling port CS2 of the driving chip; when the LED lamp is subjected to color modulation, the first resistance unit and the second resistance unit are grounded in parallel;

the lamp source display unit comprises 30 LED lamp beads, the lamp beads are LEDs 1-30 according to the attached figure 2, and the LED lamp beads are connected with an output port of the driving unit. The LED lamp beads are divided into two groups, the LED 1-LED 15 lamp beads are connected in series to form a first group of LED lamp bead group, the first group of LED lamp bead group is connected with a constant current output port D1 of the driving chip, the LED 16-LED 30 group of lamp beads are connected in series to form a second group of LED lamp bead group, and the second group of LED lamp bead group is connected with a constant current output port D2 of the driving chip.

Example 2

On the basis of embodiment 1, a diode D32 is arranged between the rectifying unit and the lamp source display unit, a diode D32 is connected in series with the lamp source display unit, and a diode D32 is used for quick start of the lamp source display unit.

Example 3

On the basis of embodiment 2, a filter unit is connected in series between the diode D32 and the lamp source display unit, the filter unit includes a capacitor C1, a resistor R1 and a resistor R2, the resistor R1 and the resistor R2 are connected in series to form a filter resistor, and the filter resistor is connected in parallel with the capacitor C1 and used for discharging energy of the capacitor C1, so that the LED lamp in 1S after the switch is turned off is completely turned off.

Example 4

As can be seen from fig. 3, when the LED lamp of this embodiment can be dimmed, unlike embodiment 1, the first resistor unit and the second resistor unit are connected in series to ground.

The LED lamp beads are 14 LEDs 1-14, the 14 LED lamp beads are connected in series to form a third group of LED lamp beads, the constant current output port D1 and the constant current output port D2 are connected in parallel to form a constant current output port D3, and the third group of LED lamp beads are connected in series with the constant current output port D3.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims

1. An LED lamp comprises a voltage input unit (1), a rectifying unit (2), a driving unit (5), a current detecting unit (3) and a lamp source display unit (4), and is characterized in that: also comprises a protection unit (6);

the voltage input unit (1) is connected with the rectifying unit (2) and provides voltage for the LED lamp;

the rectifying unit (2) is connected with the current detecting unit (3) and used for transmitting the rectified current to the current detecting unit (3);

the current detection unit (3) is connected with the driving unit (5) and is used for transmitting the current after current detection to the driving unit (5);

the driving unit (5) is connected with the protection unit (6) and the lamp source display unit (4), the driving unit (5) transmits current to the protection unit (6), the protection unit (6) protects the current and feeds the current back to the rectifying unit (2), and the driving unit (5) outputs the output current to the lamp source display unit (4);

the light source display unit (4) displays light.

2. An LED lamp as claimed in claim 1, wherein: the protection unit (6) comprises a resistor R4 and a voltage stabilizing diode D31, wherein the resistor R4 is connected with the voltage stabilizing diode in series.

3. An LED lamp as claimed in claim 2, wherein: the resistor R4 is an adjustable resistor and the zener diode is an adjustable zener diode.

4. An LED lamp as claimed in claim 1, wherein: the rectifying unit (2) comprises 4 rectifying diodes, the 4 rectifying diodes being bridged into a bridge stack BD 1.

5. An LED lamp as claimed in claim 1, wherein: the current detection unit (3) comprises a resistor Rs1, a resistor Rs2, a resistor Rs3 and a resistor Rs4, the resistor Rs1 and the resistor Rs2 are connected in parallel to form a first resistor unit, the resistor Rs3 and the resistor Rs4 are connected in parallel to form a second resistor unit, and the first resistor unit and the second resistor unit are connected with an interface of the driving unit (5).

6. An LED lamp as claimed in claim 5, wherein: the resistor Rs1, the resistor Rs2, the resistor Rs3 and the resistor Rs4 are all adjusting resistors.

7. An LED lamp as claimed in claim 1, wherein: the lamp source display unit (4) comprises at least 14 LED lamp beads, and the lamp beads are connected with the output port of the driving unit (5).

8. An LED lamp as claimed in claim 1, wherein: the driving unit (5) adopts a constant current LED driving chip with dimming and color mixing functions.