A kind of LED packaging substrate and LED packaging structure

Abstract

The invention discloses an LED packaging substrate and an LED packaging structure adopting the substrate. The substrate in the invention is of metal (such as aluminum, copper) or ceramic material, an upper surface of the substrate is provided with a reflective structure and a chip slot, the reflective structure of the upper surface of the substrate is reflected as two segments of disconnected arc-shaped structures in a top view, the chip slot is used for placing an LED chip and filling fluorescent glue, and the reflective structure is located outside the chip slot; and the reflective structure of the upper surface of the substrate adjusts the direction of a portion of light through reflection, further adjusts spatial light intensity distribution, thereby decreasing beam angles of some directions, or enabling light to lean to one side, and light color uniformity of light spots can be improved.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to an LED package base and an LED package structure using the base. Background technique [0002] In recent years, with the rise of the concept of energy saving worldwide, the general lighting technology using white LEDs has developed rapidly, especially in the field of street lighting applications for outdoor lighting. The light source efficiency of white LED single lamps using blue LED chips as excitation sources The laboratory level has reached more than 200lm / W, and the general application level in the market has also exceeded 120lm / W, which has far exceeded the light efficiency of ordinary energy-saving lamps. As white LED technology is becoming more and more popular in the general lighting market The application of white light LED devices has higher and higher requirements for luminous efficiency and luminous quality. [0003] LED packaging structure in the prior art (se...

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Problems solved by technology

[0005] see Figure 4 , Figure 37 , Figure 4 It is a schematic diagram of the light distribution curve of the LED packaging structure in the prior art, Figure 37 It is a light illustration diagram of the LED packaging structure in the prior art; it can be seen from the figure that the C0-180 light distribution curve and the C90-270 light distribution curve of the LED packaging structure in the prior art are the same, and they are all symmetrical. That is, the light is not directed towards a certain direction, or is not concentrated to a certain area; in addition, the light emitted by the LED packaging structure of the prior art in the large angle area (greater than 160 degrees) is yellowish, while the small angle (less than 30 degrees) light is bluish, so the edge of the spot generally has a yellowish aperture, and the center of the spot has a bluish area, that is, the light color of the spot is uneven

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