Bidirectional luminescent heat radiation LED

Abstract

The invention relates to a light-emitting diode (LED) technology, namely, a LED of bidirectional luminescence and heat radiation. The lead wire are led from the positive and negative electrodes on the LED chips respectively and connected to the guide pin extends to the outside of the lens cap. The chip can be covered by the lens cap, at least one chip is fixed in the through hole on the substrate, but also the transparent and adiabatic medium is positioned on the external surface of the chip, and then the external surface of the medium or the lens cap is equipped with a phosphor layer. The invention has the advantages that lighting effect of LED can increase 16 to 36 percent due to the bidirectional luminescence of the chip of the invention, due to separation of the phosphor and the chip in white LED, the phosphor is not easily heated, aged and carbonized and blacken, the color temperature and the illumination intensity is stable. The luminous flux of the product is still more than 90 percent of the initial luminous flux and the product can be made into various light-emitting LED light after aging test of 5000 hours.

Description

Technical field: [0001] The invention relates to the technical field of light-emitting diodes (LEDs), in particular to a light-emitting diode with bidirectional light emission and heat dissipation. Background technique: [0002] Light-emitting diode (LED) is a semiconductor solid light-emitting device. It uses a solid semiconductor wafer as a light-emitting material. When a forward voltage is applied to both ends, the carriers in the semiconductor recombine to cause photon emission to generate light. It is the most The popular light source technology, the characteristics of LED light source are: energy saving: energy consumption is reduced by 80% compared with incandescent lamps with the same light effect; using low voltage power supply (between 6-24V), good safety; small size, can be prepared into various Shaped devices; long life; fast response time: the response time of incandescent lamps is milliseconds, and the response time of LED lamps is nanoseconds; no harmful metal...

AI Technical Summary

Problems solved by technology

[0004] 1. The utilization rate of the light emitted by the chip is low: see Figure 1-2: chip 03 or chip 4 emits light on one side, and chip 03 or chip 4 does not emit light on the side of the bowl, but can only pass through the bowl 3 in the form of heat Transfer out, one is to cause the increase of heat, the other is to cause the waste of energy or the reduction of luminous flux

[0005] 2. The color temperature stability of the white light diode is poor, and the service life of the product is low: see Figure 1, the LED lamp is composed of a two-legged lead bracket 01, a chip 02 placed in a bracket bowl, and phosphor powder covering the chip 02 03 and the epoxy resin 04 that encapsulates the chip 02. Its disadvantage is that the chip 02 and the phosphor powder 03 are seamlessly covered when the epoxy resin 04 is packaged, and the light and heat emitted by the chip 02 accelerate the aging of the phosphor powder 03. The thick encapsulation of the resin makes the heat dissipation effect of the LED worse, and the heat dissipation capacity of the two-legged lead frame 01 is insufficient, which leads to the reduction of the light efficiency and life of the LED; 2) A beneficial improvement has been made to the LED lamp. The LED product is provided with a bowl cup 3 on a columnar substrate 2, a wafer 4 is arranged inside the bowl cup 3, and a layer of phosphor powder 5 is coated on the outer surface of the wafer 4. The substrate 2. Seal it with an anti-ultraviolet hollow lens cover 7, and fill the cavity of the lens cover 7 with an inert gas 8. The positive and negative electrodes of the wafer 4 are respectively drawn out with lead wires 6 and connected to the guide pins extending outside the lens cover 7. 1 connection, this structure reduces the temperature around the chip 4 due to the thermal conductivity of the columnar substrate 2, the guide pin 1 and the inert gas 8. However, it is found through research that due to the direct contact between the chip 4 and the phosphor powder 5, the fluorescent The powder 5 is directly heated, causing the phosphor powder 5 to be easily aged rapidly and carbonized and blackened, so that the white light generated by the combination of the blue light emitted by the blue light chip and the phosphor powder 5 will reduce the luminous flux in a short time, greatly reduce the light attenuation, and change the color temperature until The dead light means that the LED light is scrapped; therefore, only by reducing the ambient temperature of the phosphor powder can the aging and carbonization of the phosphor powder be prevented, the color temperature will not change, the working life of the LED light will be further extended, and the light efficiency of the LED light will be improved.

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