High photosynthetic efficiency high-voltage alternating-current white light LED (light emitting diode) module and white light acquiring method

Abstract

The invention provides a high photosynthetic efficiency high-voltage alternating-current white light LED (light emitting diode) module and white light acquiring method in different mesopic vision environments. The LED module comprises a substrate, high-voltage LEDs and an alternating-current drive control circuit, wherein the high-voltage LEDs of preset quantity which are connected in serial are fixed on the substrate; each high-voltage LED comprises a high-voltage blue light chip, a high-voltage orange light chip and an encapsulation layer which is used for encapsulating the high-voltage blue light chip and the high-voltage orange light chip and contains green fluorescent powder; among the serially-connected high-voltage LEDs, the high-voltage blue light chip and the high-voltage blue light chip are connected in series to form a blue light group, and the high-voltage orange chip and the high-voltage orange light chip are connected in series to form an orange group; the alternating-current drive control circuit comprises a bridge-type rectifying circuit, a constant current module and a current adjustable module; the current provided by an alternating-current power supply is divided by the bridge-type rectifying circuit into two circuits, the two circuits of current are respectively supplied to the constant current module to be used as the drive of the blue light group and to the current adjustable module to be used as the drive of the orange light group so as to independently adjust the drive current of each high-voltage orange light chip; the module has ultrahigh mesopic vision light efficiency in different mesopic vision environments.

Description

technical field [0001] The invention relates to the field of LED technology, in particular to a high-efficiency high-voltage AC white light LED module and a method for obtaining white light that can be used in different intermediate vision environments. Background technique [0002] Outdoor lighting generally has low brightness, such as road lighting, which belongs to the lighting in the intermediate vision environment. In 2010, the International Institute of Illumination (CIE) recommended the use of the MES2 model as a mesopic photometry based on visual function to calculate or measure in the middle vision environment (the mesovision brightness is 0.005cd / m 2 with 5.0cd / m 2 Between) visual brightness, so the light effect as a low-brightness lighting source also needs to use intermediate visual light effect (LE m ) to characterize the light source efficiency under the vision of the actual lighting environment. Studies have shown that in the mesopic environment, for light ...

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Problems solved by technology

[0004] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a high-efficiency high-voltage AC white light LED module and a method for obtaining white light in different intermediate vision environments, which are us

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