Four invention patentswere granted
Published:
2014-06-15
Recently, four invention patents were granted, named “Nitride red long afterglow fluorescent powder and preparation method thereof”, “Fluorescent powder for LEDs and preparation method thereof”, “Nitride or nitric oxide fluorescent powder and preparation method thereof” and “Silicate fluorescent powder for enveloping LEDs and enveloping method thereof”, numbered ZL201210227650.0, ZL201210420580.0, ZL 201210410417.6 and ZL201210412124.1, respectively.
The invention of “Nitride red long afterglow fluorescent powder and preparation method thereof” mentioned that when excitation of the excitation light source stops, the afterglow time of red long afterglow fluorescent powder is remarkably improved compared with rare earth double-doped nitride fluorescent powder, and has characteristics of stable chemical performance, environment protection and so on, and is a novel red long afterglow lighting material.
The invention of “Fluorescent powder for LEDs and preparation method thereof” mentionedthat the fluorescent powder can send out light in the scope of yellow green to orange red under the excitation of near ultraviolet or blue light, can be used by an LED emitting white light under the excitation of blue-light LED chips, and has good luminescent property, high phase purity, simple preparation process and easy operation.
The invention of “Nitride or nitric oxide fluorescent powder and preparation method thereof” mentionedthatthe distributionof particle diameters is narrower, which is conductive to improving the ageing resistance of the nitride or nitric oxide fluorescent powder; the degree of crystallinity of the product is improved and the fluorescence property is higher; and the sintering temperature during the roasting process is reduced, and the sintering duration is shortened.
The invention of “Silicate fluorescent powder for enveloping LEDs and enveloping method thereof” used the silane coupling agent to organically coat the surface of the silicate fluorescent powder for LEDs so as to obtain a continuous uniform compact enveloping layer on the surface of the fluorescent powder, thereby effectively preventing the silicate fluorescent powder matrix for LEDs from contacting water, solving the problem of high hydrolysis tendency in the fluorescent powder, and greatly enhancing packaging light effect and aging resistance of the silicate fluorescent powder for LEDs.
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