Optical fiber conduction green light source and all-fiber laser backlight source device

Abstract

The invention discloses an optical fiber conduction green light source and an all-fiber laser backlight source device. The green light source device comprises a blue laser I, an optical fiber I, a fluorescence converter and an optical fiber II which are connected in sequence, the all-fiber laser backlight source device comprises the above optical fiber conduction green light source device, a second blue light laser, a red light laser, a third optical fiber, a fourth optical fiber, a fifth optical fiber, an optical fiber beam combiner and a focusing collimating mirror. The second blue laser isconnected with the third optical fiber, the red laser is connected with the fourth optical fiber, and the second optical fiber, the third optical fiber and the fourth optical fiber of the green lightsource device are jointly combined and inserted into the optical fiber beam combiner. The other end of the optical fiber beam combiner outputs the fifth optical fiber, and the tail end of the fifth optical fiber is provided with the focusing collimating mirror. According to the green light source device, the green light luminous intensity and the conversion efficiency are improved, and the laser backlight source device is low in production cost, good in device thermal management and high in projection quality.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to an optical fiber transmission green light source and an all-fiber laser backlight source device. 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, digital cinema, and mobile phone projection. [0003] The core of laser display technology has two parts, 1) imaging technology; 2) light source technology. Among them, the core imaging devices are dominated by the United States and Japan, and domestic researchers still need further research; among the light source technologies, the most satisfactory is the red, green and blue three-color laser diode (Laser Diodes, 3LD) projection technology, such as the patent CN207216255U , respec...

AI Technical Summary

Problems solved by technology

However, this method has a small penetration depth of blue light, and the heat is concentrated in a small area. The thermal focusing temperature of the photo-conversion material is extremely high, and there are common problems of temperature quenching and concentration quenching, which eventually cause luminescence quenching or even failure.

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