WO2023284081A1

WO2023284081A1 - Alternating-current flickering led chip

Info

Publication number: WO2023284081A1
Application number: PCT/CN2021/116080
Authority: WO
Inventors: 侯启兵; 郑明松
Original assignee: 江门市启营照明科技有限公司
Priority date: 2021-07-16
Filing date: 2021-09-02
Publication date: 2023-01-19
Also published as: CN216017212U; EP4207948A4; EP4207948A1

Abstract

Disclosed in the utility model is an alternating-current flickering LED chip. The alternating-current flickering LED chip comprises a chip substrate, wherein the chip substrate is provided with a chip-internally-rectified negative electrode, a chip-rectified positive electrode, a first alternating-current input end, a second alternating-current input end and an LED driving pin; a capacitor is connected in parallel between the chip-rectified negative electrode and the chip-rectified positive electrode; and an LED (light emitting diode) is connected between the chip-rectified positive electrode and the LED driving pin. Compared with the prior art, the utility model has the advantages that in the utility model, rectification is performed inside an integrated circuit, such that a chip can still work in an alternating current case, and an LED is driven to flicker. Since the cost of designing a capacitor filter in an integrated circuit is relatively high, capacitor filtering is used outside of an LED chip, so as to meet the requirement of working in a complete alternating-current state.

Description

An AC flashing LED chip

technical field

The utility model relates to an LED chip, in particular to an AC flashing LED chip.

Background technique

In the field of LED decorative lights, in addition to the regular LED constant light effect, many of them have flashing LEDs as a flashing decorative effect. Fig. 3 is the circuit principle of the IC under conventional DC operation. After the DC power supply is powered on, the internal oscillation will be carried out, and the LED will be driven to flash according to the set frequency. Since the IC is usually used in a DC state, many decorative lights need rectification and filtering to make the decorative light strings with flashing ICs work, and the cost of designing capacitor filters in integrated circuits is relatively high. Therefore, developing an AC flashing LED chip has become an urgent problem to be solved by those skilled in the art.

technical solution

The utility model provides an AC flashing LED chip in order to solve the above disadvantages.

The above purpose of the utility model is achieved through the following technical solutions: an AC flashing LED chip, including a chip substrate, the chip substrate is provided with a negative pole after internal rectification of the chip, a positive pole after rectification of the chip, a first AC input terminal, a second Two AC input ends and LED drive pins, a capacitor is connected in parallel between the chip rectified negative pole and the chip rectified positive pole, and an LED light-emitting diode is connected between the chip rectified positive pole and the LED drive pin.

The AC flashing LED chip is connected with an LED bracket, and the LED bracket is provided with pin 1, pin 2, pin 3, and pin 4, and the capacitor is connected between pin 2 and pin 3. Pin 2 and pin 3 are respectively connected to the negative pole after rectification inside the chip and the positive pole after rectification of the chip, and the LED driving pin and the first AC input end are respectively connected to pin 1 and pin 4; the AC flashing LED chip and the LED bracket An epoxy resin coating is provided on the outside, and the epoxy resin coating is exposed from the first pin and the fourth pin.

When working, after the chip is rectified, the negative pole and the positive pole after the chip are rectified are connected in parallel with capacitors for filtering, so that the LED chip can be used completely under AC conditions (only the negative drive LED is explained here, and the positive drive is not specifically explained).

Beneficial effect

The utility model has the advantages compared with the prior art:

1. The utility model performs rectification in the integrated circuit, which can still make the chip work and drive the LED to flash under the condition of AC. Because the cost of designing capacitive filtering in integrated circuits is relatively high, capacitive filtering is used outside the LED chip to meet the requirements of working in a complete AC state.

2. The utility model solves the need to use flashing LEDs in decorative lights or in the case of mains power. It can work without rectification and filtering, direct resistance or other voltage reduction, which greatly simplifies the requirements for the use environment and makes it More fields are available.

Description of drawings

Fig. 1 is a schematic circuit diagram of the LED chip of the present invention under AC operation.

Fig. 2 is a schematic diagram of packaging of the LED chip of the present invention.

Fig. 3 is a circuit schematic diagram of a conventional LED chip working under direct current.

Embodiments of the present invention

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1 and Figure 2, an AC flashing LED chip includes a chip substrate, and the chip substrate 100 is provided with a negative electrode 101 after internal rectification of the chip, a positive electrode 102 after rectification of the chip, a first AC input terminal 103, a second The AC input terminal 104 and the LED driving pin 105 are connected in parallel with the capacitor 106 between the chip rectified negative pole 101 and the chip rectified positive pole 102, and an LED light-emitting diode 107 is connected between the chip rectified positive pole 102 and the LED driving pin 105.

The AC flashing LED chip is connected with an LED bracket 200, and the LED bracket 200 is provided with pin one 201, pin two 202, pin three 203, pin four 204, and the capacitor 106 is connected to pin two 202, Between the three pins 203, the two pins 202 and three 203 are respectively connected to the negative pole 101 after rectification inside the chip and the positive pole 102 after the rectification of the chip, and the LED driving pin 105 and the first AC input terminal 103 are respectively connected to pins One 201 and pin four 204; the AC flashing LED chip and the LED bracket 200 are provided with an epoxy resin covering layer, and the first pin 201 and pin four 204 expose the epoxy resin covering layer.

When working, the negative electrode 101 after the chip rectification and the positive electrode 102 after the chip rectification are connected in parallel with the capacitor 106 for filtering, so that the LED chip can be completely used in AC conditions (only the negative drive LED is explained here, and the positive drive is not specifically explained. ).

Figure 3 shows a schematic diagram of the LED package. The largest pin 203 is used to place the LED chip, and the capacitor 106 is horizontally placed between the pin 202 and the pin 203, and the negative electrode 101 after internal rectification of the chip is connected to the positive electrode 102 after rectification of the chip through a welding wire. Connect the AC input first AC input terminal 103 and the second AC input terminal 104 to pin 202 and pin 204 respectively, use epoxy curing molding after welding, and finally cut pin 202 and pin 203 short, Only pins 201 and 204 are reserved for AC input.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims

An AC flashing LED chip is characterized in that it includes a chip substrate, and the chip substrate is provided with a negative pole after rectification inside the chip, a positive pole after rectification of the chip, a first AC input terminal, a second AC input terminal, and an LED drive pin. A capacitor is connected in parallel between the chip rectified negative electrode and the chip rectified positive electrode, and an LED light-emitting diode is connected between the chip rectified positive electrode and the LED driving pin.
The AC flashing LED chip according to claim 1, characterized in that: the AC flashing LED chip is connected with an LED bracket, and the LED bracket is provided with pin one, pin two, pin three, and pin four , the capacitor is connected between pin 2 and pin 3, the pin 2 and pin 3 are respectively connected to the negative electrode after rectification inside the chip, and the positive electrode after rectification of the chip, and the LED driving pin and the first AC input end are respectively Connect pin 1 and pin 4; said AC flashing LED chip and LED bracket are provided with an epoxy resin covering layer, and said pin 1 and pin 4 are exposed from the epoxy resin covering layer.