QLA694B2Y

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LEDs - Circuit Board Indicators, Arrays, Light Bars, Bar Graphs

QlA694B2Y Application Field and Working Principle

QlA694B2Y is a type of light-emitting diode (LED) specially designed for circuit board indicators, arrays, light bars, bar graphs and other display applications. It is made up of an electriclight-emitting S3 semiconductor chip and a packaging shell that shields the electric light-emitting chip from the outside world. The light emitting chip is composed of P-type and N-type semiconductor and a PN junction. In the case of forward biasing of current, electrons and holes in the PN junction are injected into a transition zone between the P and N type semiconductor layer, and light energy is radiated.

The QlA694B2Y has a pre-assembled built-in integrated circuit, and the integrated circuit package is packaged without the need for additional components. It is a single type indicator with a simple circuit structure, high reliability and super long life. Its advantages are low operating temperature, no need to adjust the temperature field, high-precision color reproduction, high-quality optical spot and selectable luminous intensity.

The working principle of QlA694B2Y is mainly based on the principle of current injection lighting. It uses the injection of electric charge to determine the luminous state, and the LED element structure determines the direction of the light emitted by the LED. The current injection method is a kind of energy conversion method, by adjusting the current to control the luminous intensity, under this control method, the current control range is possible, which has greater control flexibility and is also efficient.

From the perspective of application field, QlA694B2Y is mainly used in the indicator field, such as audio or agricultural instruments, control indicators, push buttons, level indicators, analog and digital displays, etc. It also can be used in decorative lighting field, such as TV indicators, advertising/fluorescent lamps, street lamp/search lights, etc. In order to achieve a better visual effect, the current should be strictly controlled. The optimal adjustable current range is about 10mA.

In summary, QlA694B2Y is one of LEDs designed for circuit board indicators, arrays, light bars, bar graphs and other display applications. It has a pre-assembled built-in integrated circuit and no additional components are needed. It is a single type indicator with a simple circuit structure, high reliability and super long life. It is based on the principle of current injection lighting, which means it uses the injection of electric charge to determine the luminous state. Its application field includes indicators, decorative lighting, etc.

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