Controller for LED (Light Emitting Diode) luminance

Abstract

The invention discloses a controller for LED (Light Emitting Diode) luminance, which comprises a signal input circuit, a signal output circuit, a first resistor, a second resistor, a third resistor, a first triode and a second triode, wherein a base electrode of the first triode is connected with a collector electrode of the second triode; the signal input circuit is connected with a circuit between the base electrode of the first triode and the collector electrode of the second triode; one end of the first resistor is connected with the circuit between the base electrode of the first triode and the collector electrode of the second triode while the other end is grounded; the two ends of the third resistor are respectively connected with an emitter electrode of the first triode and the base electrode of the second triode; one end of the second resistor is connected with the circuit between the third resistor and the base electrode of the second triode while the other end is grounded; and the signal output circuit is connected with the collector electrode of the first triode. Such a structure is adopted by the controller for the LED luminance, the whole structure is simple and the occupied space is less. The cost of the components forming the controller is low, so that the cost of the controller is low.

Description

technical field [0001] The invention relates to a voltage regulating device, in particular to a light emitting brightness controller of a light emitting diode. Background technique [0002] LED (Light Emitting Diode), that is, light-emitting diode, is a solid-state semiconductor device that can directly convert electricity into light. The heart of LED is the wafer of a semiconductor, and one end of wafer is attached on a bracket, and one end is negative pole, and the other end connects the positive pole of power supply, and whole wafer is encapsulated by epoxy resin. Semiconductor wafer is made up of two parts, and a part is P-type semiconductor, and hole is dominant in it, and the other end is N-type semiconductor, and here mainly is electron, but when these two kinds of semiconductors are connected, there is a gap between them. Form a "P-N junction". When the current acts on the chip through the wire, the electrons will be pushed to the P area, and in the P area, the ele...

AI Technical Summary

Problems solved by technology

[0003] With the development of electronic technology, the application of LEDs in electronic products is becoming more and more common. In electronic products such as automobiles and mobile phones, in order to ensure that the brightness of LEDs will not dim with the drop of battery voltage, electronic Low-dropout linear voltage regulators are generally installed in products. However, low-dropout linear voltage regulators are installed in electronic products, which occupy a large space and are expensive, thereby increasing the cost of manufactured electronic products.

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