A high brightness green light source device based on rod-shaped light conversion material

Abstract

The invention discloses a high-brightness green light source device based on a rod-shaped light conversion material, which includes a laser, a reflector, a fluorescent conversion rod, and a heat dissipation base; The included angle with the horizontal plane is 30~40°; the reflector is located on the right side of the fluorescent conversion rod, the distance between the reflector and the right end of the fluorescent conversion rod is 1.0mm~5.0mm, the fluorescent conversion rod is cylindrical, and the left end surface is polished Inclined surface, the direction of the polished inclined surface is perpendicular to the light emitting direction of the laser; the laser and the fluorescent conversion rod are built into the heat dissipation base, and are closely attached to the heat dissipation base. . The invention adopts the inclined surface polished light conversion material, breaks the total reflection effect and luminous symmetry of the traditional vertically polished light material, and greatly improves the green light output efficiency of the light conversion material and the luminous efficiency of the light source.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a high-brightness green light source device based on a rod-shaped light conversion material. Background technique [0002] Laser display technology (Laser display technique, LDT) has significant advantages such as rich colors, high saturation, and strong contrast, and is widely considered to be the mainstream technology for future high-end displays such as large-screen projection, laser TV, and mobile phone projection. Its color gamut coverage can reach more than 90% of the color space that can be recognized by the human eye, and it can most truly reproduce the rich and gorgeous colors of the objective world. It is called "a revolution in the history of human vision". Laser display mainly has two forms: projection type and scanning type. The core backlight source is mainly three primary color light sources, namely blue light, green light and red light. Among them, green li...

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Problems solved by technology

However, there are some unavoidable problems: 1) As the most widely used pump source in solid-state lighting, blue LEDs have inherent characteristics of sudden drop in efficiency and low power density (<2W / mm2) that limit their integration and miniaturization ; 2) LED side pumping is adopted, and the blue light is evenly irradiated, which will lead to the reabsorption of fluorescence away from the output end face, such as document 3 (Low Etendue Yellow-Green Solid-State Light Generation by Laser-pumped LuAG: Ce Ceramic), there are also similar 3) In the two literatures, the coating scheme is selected to improve the absorption rate of blue light and the utilization rate of yellow light, and the cost is relatively high

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