Stable long-acting lighting indication device for light-emitting diode

Abstract

The illumination indicating device includes light emitting diode (LED) and suitable electrical source. Characters are that the indicating device includes multiple cascaded luminescence units, and one luminescence unit is composed of at least one LED connected to relevant voltage stabilizing diode in parallel. Chip of voltage stabilizing diode in luminescence unit and chip of LED are packaged inside same package shell. Two ends of cascaded luminescence units are connected to collector of steady flow triode and anode of electrical source; and stabilizing resistance is connected between emitter and ground so as to constitute illumination device of luminescence unit with structure of steady flow. Further, control triode is added to prevent extinction of cascaded LED when voltage is decreased. Features are: steady, reliable, electricity saving, and long service life.

Description

technical field [0001] The invention relates to a stable and long-lasting lighting indicating device of a light emitting diode. Background technique [0002] Light-emitting diode (LED) is a semiconductor device that directly converts electrical energy into light energy and radiation energy. It has low voltage, low power consumption, high-efficiency luminous response, rich colors, stable and reliable performance, light weight, small size, and firm structure. And other advantages, so it is widely used in lighting signal indication and image display and other fields. [0003] Light-emitting diodes used as lighting are generally connected in parallel or in series, and can also be connected in parallel and then connected in series, or connected in series and then connected in parallel. Generally, the voltage drop of LEDs is about 2-3 volts. Especially when the power supply voltage is high, multiple LEDs with the same current need to be connected in series. bright and ineffectiv...

AI Technical Summary

Problems solved by technology

If two or more light-emitting diodes of the same voltage are connected in parallel and then connected in series, or two-chip or multi-chip parallel-connected light-emitting diodes are used in series, the probability of damage will increase. When one of the light-emitting diodes is disconnected, it will Increase the current of the light-emitting diode connected in parallel with it, making this light-emitting diode more likely to be damaged, so that the entire string of circuits will fail to emit light

Such as lights or red and green traffic lights, etc., the light-emitting diodes used in series structure, the number of light-emitting diodes used is large, the working current is large, individual light-emitting diodes are easily damaged, especially when one of the light-emitting diodes is disconnected, it will make the whole The string of light-emitting diodes is not bright; or when the power supply voltage is unstable, especially lower than the working voltage, the entire string of light-emitting diodes will not light up. If step-down and voltage stabilization are used, it will often cause efficiency reduction and electromagnetic radiation interference.

These problems have not been effectively resolved for a long time

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