EP4207948A1

EP4207948A1 - Alternating-current flickering led chip

Info

Publication number: EP4207948A1
Application number: EP21949856.5A
Authority: EP
Inventors: Qibin HOU; Mingsong ZHENG
Original assignee: Jiangmen Qiying Lighting Technology Co Ltd
Current assignee: Jiangmen Qiying Lighting Technology Co Ltd
Priority date: 2021-07-16
Filing date: 2021-09-02
Publication date: 2023-07-05
Also published as: EP4207948A4; CN216017212U; WO2023284081A1

Abstract

The present invention discloses an AC twinkling LED chip, comprises a chip substrate, a post-chip rectification negative terminal, a post-chip rectification positive terminal, a first AC input terminal, a second AC input terminal and an LED drive pin, at least one capacitor is parallelly connected with the post-chip rectification negative terminal and the post-chip rectification positive terminal, wherein an LED luminescent diode is connected in between the post-chip rectification positive terminal and the LED drive pin. Advantages of the present invention over the prior art are that: in the present invention, by conducting rectification in the ICs, chips can work in AC conditions and drive the LED lights to shine. As it involves high expenses to design capacitors and filters in the ICs, by using the capacitors and the filters outside the LED chips, the LED chips can work in absolute AC conditions.

Description

Technical field

The present invention relates to LED chips, especially an AC twinkling LED chip.

Background technology

In the technical field of LED decoration lights, besides conventional constant shining effects of LED lights, there are twinkling LEDs are used for twinkling decorative effects. In figure 3 the circuit theory of an IC using DC current is shown. After energizing the DC power supply oscillates and drives the LED to light up at a predetermined frequency. As the working environment of ICs is usually in DC state, to make the decoration lights with twinkling ICs to work it is necessary to conduct rectifying and filtering, however, designing capacitors and filters in the ICs involve high expenses. Therefore, it is urgent to design an AC twinkling LED chip for those skilled in the art.

Summary of the invention

The present invention is to address the foregoing deficiency and provides an AC twinkling LED chip.
The purpose of the present invention is realized by the following technical solutions: an AC twinkling LED chip, comprises a chip substrate, a post-chip rectification negative terminal, a post-chip rectification positive terminal, a first AC input terminal, a second AC input terminal and an LED drive pin, a capacitor is parallelly connected with the post-chip rectification negative terminal and the post-chip rectification positive terminal, wherein an LED luminescent diode is connected in between the post-chip rectification positive terminal and the LED drive pin.
An LED support is connected with the AC twinkling LED chip, wherein a first pin, a second pin, a third pin and a fourth pin are provided on the LED support, the capacitor is connected in between the second pin and the third pin, the second pin and the third pin are respectively connected with the post-chip rectification negative terminal and the post-chip rectification positive terminal, the LED drive pin and the first AC input terminal are respectively connected with the first pin and the fourth pin; an epoxy resin coating layer is provided on the AC twinkling LED chip and the LED support, wherein the first pin and the fourth pin are exposed out of the epoxy resin coating layer. During use, after parallel connection of the post-chip rectification negative terminal and the post-chip rectification positive terminal with the capacitor, filtering, the LED chip is usable in AC conditions (herein only negatively driving LED is used for explanation, positive driving has not been elaborated on).
Advantages of the present invention over the prior art are that:

1. In the present invention, rectification is done in the integrated circuit, in AC conditions the chip can still work and drive the LED to glow. As designing capacitors and filters in the integrated circuit involves high expenses, by using the capacitors and the filters outside the LED chip, working at AC conditions can be fully satisfied.
2. With the technical solution in the present invention, the use of the twinkling LED in utility power conditions without rectification and filtering is realized, by just providing resistance or taking other measures to lower down the voltage the decoration light can be used, the requirements on the usage environment are simplified to a great extent and the decoration lights have more application areas.

Brief description of drawings

Figure 1 shows a circuit principle of an LED chip using AC current according to the present invention.
Figure 2 shows encapsulation of the LED chip according to the present invention.
Figure 3 shows the circuit principle of conventional LED chips using DC current.

Embodiments

Hereinafter a further description will be given to the present invention in conjunction with the accompanying drawings.
As shown in figures 1 and 2, an AC twinkling LED chip, comprises a chip substrate, a post-chip rectification negative terminal 101 and a post-chip rectification positive terminal 102, a first AC input terminal 103, a second AC input terminal 104 and an LED drive pin 105 are provided on the chip substrate 100, a capacitor 106 is parallelly connected with the post-chip rectification negative terminal 101 and the post-chip rectification positive terminal 102, and at least one LED luminescent diode 107 is connected in between the post-chip rectification positive terminal 102 and the LED drive pin 105.
An LED support 200 is further connected on the AC twinkling LED chip, wherein the LED support 200 is provided with a first pin 201, a second pin 202, a third pin 203 and a fourth pin 204, the capacitor 106 is connected in between the second pin 202 and the third pin 203, wherein the second pin 202 and the third pin 203 are respectively connected with the post-chip rectification negative terminal 101 and the post-chip rectification positive terminal 102, the LED drive pin 105 and the first AC input terminal 103 are respectively connected with the first pin 201 and the fourth pin 204; an epoxy resin coating layer is provided around the AC twinkling LED chip and the LED support 200, and the first pin 201 and the fourth pin 204 are exposed outside the epoxy resin coating layer.
During use, the capacitor 106 and at least one filter are parallelly connected with the post-chip rectification negative terminal 101 and the post-chip rectification positive terminal 102, so that the LED chip can be used in AC conditions (herein only negatively driven LEDs are used for explanation and positively driven LEDs have not been elaborated on.)
Figure 3 is a diagram showing encapsulation of the LED. The largest pin 203 is configured for holding the LED chip, place the capacitor laterally in between the second pin 202 and the third pin 203, and connect the post-chip rectification negative terminal 101 and the post-chip rectification positive terminal 102 by soldering. Connect the first AC input terminal 103 and the second AC input terminal 104 respectively with the second pin 202 and the fourth pin 204, after soldering, cure and form with epoxy resin, finally cut the second pin 202 and the third pin 203 reserve only the first pin 201 and the fourth pin 204, and supply AC power.
The foregoing are only some embodiments of the present invention and not intended to limit the protection scope of the present invention, all equivalent structural and flow replacement making use of the contents disclosed in the description and drawings of the present invention or direct or indirect use of the present invention in other related technical fields shall be similarly covered in the protection scope of the present invention.

Claims

An AC twinkling LED chip, comprising a chip substrate, a post-chip rectification negative terminal, a post-chip rectification positive terminal, a first AC input terminal, a second AC input terminal and an LED drive pin, at least one capacitor is parallelly connected with the post-chip rectification negative terminal and the post-chip rectification positive terminal, wherein an LED luminescent diode is connected in between the post-chip rectification positive terminal and the LED drive pin.
The AC twinkling LED chip according to claim 1, wherein an LED support is connected with the AC twinkling LED chip, wherein a first pin, a second pin, a third pin and a fourth pin are provided on the LED support, the capacitor is connected in between the second pin and the third pin, the second pin and the third pin are respectively connected with the post-chip rectification negative terminal and the post-chip rectification positive terminal, the LED drive pin and the first AC input terminal are respectively connected with the first pin and the fourth pin; an epoxy resin coating layer is provided on the AC twinkling LED chip and the LED support, wherein the first pin and the fourth pin are exposed out of the epoxy resin coating layer.