Color temperature adjustable light emitting diode (LED) flat lamp for sickroom

Abstract

The invention discloses a color temperature adjustable light emitting diode (LED) flat lamp for a sickroom. The lamp comprises a lamp panel shell, a plurality of aluminum base plates, wherein the plurality of aluminum base plates are uniformly fixed on the lamp panel shell; a cold white LED chip or a warm white LED chip is attached to each aluminum base plate; the aluminum base plate attached with the cold white LED chip and the aluminum base plate attached with the warm white LED chip are fixed on the lamp panel shell at intervals; the inner side edge of the lamp panel shell is provided with a driving circuit; the driving circuit comprises a voltage-stabilizing circuit, a trigger circuit, a pulse width adjustable circuit, an LED constant current driving circuit and a switching circuit; the trigger circuit and the pulse width adjustable circuit are connected with the voltage-stabilizing circuit; the LED constant current driving circuit is connected with the trigger circuit and the pulse width adjustable circuit respectively; and the switching circuit is connected with the LED constant current driving circuit and the voltage-stabilizing circuit respectively. The flat lamp has the advantages of improving the illuminating quality of the sickroom, contributing to keeping patients happy and accelerating the improvement on illness states, along with adjustable color temperature, adjustable brightness, long service life, high safety, environmental protection and suitability for sickroom illumination.

Description

technical field [0001] The invention relates to a lighting fixture, in particular to an LED panel lamp with adjustable color temperature suitable for wards. Background technique [0002] At present, the main products used in the lighting of major wards are fluorescent tubes. Generally, fluorescent tubes will cause brightness changes due to changes in ambient temperature, and it takes 5-6 minutes to turn on the lights in winter to reach a stable brightness, and the light is dim and accompanied by flickering phenomena; at the same time , Due to blackening and deterioration of fluorescent substances, the luminous flux gradually decreases, and the light color also changes somewhat. With the continuous development of a series of products using LED as the light source, the continuous maturity of LED fluorescent tube lighting technology, LED products gradually replace conventional lighting products, and solve a series of problems such as dim light and light color changes of fluores...

AI Technical Summary

Problems solved by technology

With the continuous development of a series of products using LED as the light source, the continuous maturity of LED fluorescent tube lighting technology, LED products gradually replace conventional lighting products, and solve a series of problems such as dim light and light color changes of fluorescent lights; in the process of LED lighting industry development Among them, many companies are currently researching on LED products with adjustable color temperature, but the reasonable light distribution technology of the chip and the design of the control circuit are still difficult problems; at the same time, it is designed according to the particularity of the ward's own environment, and is specially used for the adjustable color temperature of the ward. The field of adjustable LED flat panel lights is still in a blank

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