Fluorescent powder performed thin film-based LED lamp and manufacturing method thereof

Abstract

The invention relates to a fluorescent powder performed thin film-based LED lamp and a manufacturing method thereof. The LED lamp consists of a metal substrate 1, a chip 2, a gold wire 3, a binder layer 4, a fluorescent powder performed thin film layer 5, a light transmitting lens 6, a lamp shade 7 having an inner wall which is a reflector, wherein the chip 2 is fixed on the metal substrate 1; the gold wire 3 is first well connected with a circuit between the chip 2 and the metal substrate 1; an integration formed by the chip 2, the gold wire 3 and the metal substrate 1 is coated with a layer of the binder 4 to cover the metal substrate 1, the chip 2 and the gold wire 3 completely; the integration is arranged in the lamp shade 7 having the inner wall which is the reflector; the light transmitting lens 6 is arranged on the light-emitting side of the metal substrate; and the fluorescent powder performed thin film layer 5 is bonded on the inner side of the light transmitting lens 6. The LED lamp manufactured by using the packaging structure can simplify production process, improve production efficiency and greatly reduce cost and has high consistency and uniformity in various light-emitting performances.

Description

technical field [0001] The design of the invention relates to an LED lighting lamp based on a fluorescent powder prefabricated film and a manufacturing method thereof, belonging to the field of solid lighting. Background technique [0002] As a new type of solid light source, LED (Light Emitting Diode) develops rapidly because of its small size, fast response, good shock resistance, long life, especially energy saving and environmental protection. In recent years, it has been widely used in large-screen display, traffic signal lights, landscape lighting, street lighting and other fields. However, due to some difficulties that have not been overcome, it has not yet entered the general lighting fields such as home lighting and office lighting. [0003] Due to technological development, the current mainstream LED manufacturing method is blue light chip + yellow phosphor powder. The specific process is: first fix the chip on the bracket, connect the circuit; then weigh the phosp...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned LED packaging process, there are several key problems: first, it is difficult to keep the concentration of the phosphor powder consistent from beginning to end when dispensing glue, because the phosphor powder maintains a certain particle size in the binder, and the fluorescent powder The powder has a certain weight, and its density is much larger than that of the binder. Therefore, although the binder is relatively viscous, the phosphor will still slowly settle in it, and the time for degassing is longer, which indirectly promotes the phosphor powder. Therefore, when dispensing glue, the concentration of phosphor powder in the glue dispensed at the beginning is higher, and the concentration is lower as the glue is dispensed, which leads to different batches or even LEDs manufactured in the same batch. In the end, the factory must classify the manufactured LEDs according to parameters such as color error or color temperature; second, it is difficult to achieve consistent thickness of the glue on a single chip, because the glue dispensed by the glue dispenser is equal to each other. It is approximately spherical, so the cured phosphor coating must be thick in the middle and thin in the periphery. The light chromaticity of the finally packaged LED must be inconsistent from the middle and the periphery, yellowish in the middle and blue in the periphery; The problem of luminous attenuation caused by the current LED packaging process is to directly dispense the mixture of phosphor and binder onto the chip, and the chip will emit a lot of heat when it is working, causing the temperature around the chip to rise rapidly. As a result, the luminous efficiency of the phosphor is continuously reduced due to heat, which directly affects the life of the LED.

According to market research, the price of a 5W white LED lighting lamp composed of a single 1W LED is about 100 yuan. , the vast majority of families cannot accept it

Images