Fluorescent colloid, high-luminous-efficiency light source and manufacturing method of high-luminous-efficiency light source

Abstract

The invention relates to a fluorescent colloid, a high-luminous-efficiency light source and a manufacturing method of the high-luminous-efficiency light source; the fluorescent colloid is prepared byuniformly mixing fluorescent powder, silica gel and fumed silica; the high-luminous-efficiency light source comprises a substrate, and two circuit layers, a plurality of luminous crystals and a silicagel box dam are fixedly arranged on the substrate. The two circuit layers and the plurality of luminous crystals are located in an annular area defined by the silica gel box dam, the plurality of luminous crystals are located between the two circuit layers, the circuit layers are connected with the luminous crystals adjacent to the circuit layers and any two adjacent luminous crystals are connected through gold threads, and the annular area defined by the silica gel box dam is evenly filled with the fluorescent colloid. According to the manufacturing method of the high-luminous-efficiency light source, when the fluorescent colloid is cured, high-temperature rapid curing is firstly carried out, and then baking curing is carried out. According to the high-luminous-efficiency light source, the fluorescent powder is far away from the luminous crystals and the substrate, the high-temperature influence on the fluorescent powder can be effectively reduced, and the qualitative change is reduced, so that the luminous efficiency and the luminous stability of the light source are effectively improved, and the light attenuation is reduced.

Description

technical field [0001] The invention relates to a fluorescent colloid, a high-luminous-efficiency light source and a manufacturing method of the high-luminous-efficiency light source, and belongs to the technical field of LED packaging. Background technique [0002] The LED products under the existing technology have a large light decay during long-term use, the brightness will drop sharply, and the color coordinates will drift seriously. Eyes are uncomfortable, but also cause blue light damage to human eyes. [0003] The reasons for the above phenomenon mainly focus on the following aspects: [0004] 1. The substrate adopts silver-plated copper substrate / aluminum substrate or copper bracket / iron bracket. During the process of light emitting from the light source, a large part of the energy is converted into heat. This part of heat transfers the silver ions plated on the substrate / support, and the Cl, S ions, etc. are formed by the combination of airtight silica gel or sil...

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Problems solved by technology

[0004] 1. The substrate adopts silver-plated copper substrate / aluminum substrate or copper bracket / iron bracket. During the process of light emitting from the light source, a large part of the energy is converted into heat. This part of heat transfers the silver ions plated on the substrate / support, and the Cl, S ions, etc. are formed by the combination of airtight silica gel or silicone resin and Ag ions to form Cl or S compounds. The compound is mostly black, and it adheres to the substrate, resulting in a decrease in reflectivity, resulting in a sharp drop in brightness and light attenuation. ;

[0005] 2. In order to improve the initial brightness, silicone resin is used as the primer of the luminescent crystal. This kind of primer generally has a low thermal conductivity. The heat generated by the luminescent crystal for a long time will cause the yellowing of this colloid, resulting in a decrease in reflectivity;

[0006] 3. Also in order to improve the initial brightness, silicone resin with high refraction (above 1.53) is usually used as the encapsulation colloid. Radiant heat will be generated when the light-emitting crystal emits light. However, the temperature resistance of silicone resin is not high, and it will cause yellowing when used for a long time. Change;

[0007] 4. Causes of powder sinking, the heat generated during the luminescent crystal’s luminous process will cause qualitative changes in the phosphor powder around the luminescent crystal, resulting in color shift, color temperature rise, and brightness decrease

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