High-light-effect and ultra-high-color-development high-voltage alternating-current warm white LED (light emitting diode) and acquisition method thereof

Abstract

The invention provides a high-light-effect and ultra-high-color-development high-voltage alternating-current warm white LED (light emitting diode) and an acquisition method thereof. The LED comprises a substrate, tandem high-voltage LED bodies, a fluorescent cover and an alternating-current driving control circuit, wherein the number of the tandem high-voltage LED bodies is preset; the tandem high-voltage LED bodies are fixed on the substrate; each high-voltage LED body comprises a high-voltage red-light chip, a high-voltage blue-light chip and a green emitting phosphor packaging layer for packaging the high-voltage red-light chip and the high-voltage blue-light chip; the fluorescent cover is provided with a yellow emitting phosphor coating; space for accommodating the high-voltage LED bodies is formed by matching the fluorescent cover and the substrate; the alternating-current driving control circuit comprises a bridge rectifier circuit and two current adjustable modules; the current provided by an alternating-current power supply is divided into two channels of current by using the bridge rectifier circuit; the two channels of current are respectively supplied to the two current adjustable modules and serve as drivers of a blue-light group and a red-light group. The high-light-effect and ultra-high-color-development high-voltage alternating-current warm white LED is high in light effect, light rays are uniform, and light emergent directions are consistent.

Description

technical field [0001] The invention belongs to the technical field of LEDs, and relates to a high-voltage AC LED, in particular to a high-voltage AC warm white LED with high light efficiency and ultra-high color rendering and a method for obtaining the same. Background technique [0002] At present, high-voltage AC white light LEDs are realized by using multiple blue-light high-voltage chips to excite phosphors in series and a bridge rectification drive circuit. Existing high-voltage AC white light LEDs mainly use YAG phosphor powder like DC white light LEDs, so their color rendering index Ra is around 75. To improve the color rendering index of high-voltage AC white LEDs, it is necessary to add red phosphors, but this will greatly reduce its light efficiency, and it will not reflect its energy-saving advantages compared with traditional tricolor fluorescent energy-saving lamps. In addition, for warm white light, the light efficiency of LED is lower than that of traditiona...

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Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a high-voltage AC warm white LED with high luminous efficiency and ultra-high color rendering and its obtaining method, which is used to solve the problem of some saturated colors of the existing high-voltage AC white LED. The problem that the special color rendering index is low and cannot replace incandescent lamps with warm tones and ultra-high color rendering index (Ra greater than 97)

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