Screening equipment for promoting output of color zone of white-light LED lamp bead and screening method thereof

Abstract

The invention discloses a set of screening equipment for promoting the output of the color zone of white-light LED lamp beads and a screening method of the screening equipment. A plurality of layers of filtering membranes are arranged in the screening equipment, and filtering through holes are formed in all the filtering membranes. The screening equipment is connected with a steel cylinder and a magnetic stirrer, the two filtering membranes with different hole diameters are installed in the screening equipment to form three filtering cavities, and the hole diameter of the upper filtering membrane is larger than the hole diameter of the lower filtering membrane. Fluorescent adhesive having been stirred is added into the first-stage filtering cavity to connect the screening equipment and the steel cylinder in a sealing mode. The magnetic stirrer is started to perform stirring; a first valve, a second valve and a third valve are opened in sequence; when the fluorescent adhesive in the third filtering cavity is stable and does not change, the third valve, the second valve and the first valve are closed in sequence; the fluorescent adhesive in the filtering cavities is taken out in sequence, and then the fluorescent adhesive different in grain diameter and uniform in grain diameter is obtained. According to the equipment and the method, the fluorescent adhesive is screened through air flow, the fluorescent adhesive obtained through the screening is respectively used for manufacturing the LED lamp beads, and thus the output of the color zone of the LED lamp beads can be promoted.

Description

technical field [0001] The invention relates to a screening device and a screening method for improving the output of the color area of ​​white LED lamp beads, belonging to the field of LED packaging. Background technique [0002] White LED is known as the fourth-generation green lighting source because of its advantages of high efficiency, energy saving, long life, no pollution, and high reliability. With the steady improvement of LED luminous efficiency and the continuous decline of prices, LED semiconductor lighting will gradually replace traditional lighting sources such as incandescent lamps and ordinary fluorescent lamps. [0003] The key core of LED semiconductor lighting is the production of LED lamp beads. The most commonly used white light LED production method in the industry is to use LED blue light chips with phosphor powder. This method has advantages in production cost, heat dissipation and control circuit. Phosphor powder is one of the key materials of LED ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the output rate of the existing LED lamp bead color area is low and the reliability of the product will be affected by the addition of anti-settling powder during operation, and a method for improving the output of the white LED lamp bead color area is designed. Screening equipment and screening method thereof, the equipment and method use airflow to screen the fluorescent glue, and then use the screened fluorescent glue to increase the output rate of the LED lamp bead color area

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