Laser column source with lateral luminescence

Abstract

The invention discloses a laser column source with lateral luminescence, which comprises a laser source, a beam expanding lens, a thread microprism light guide stick and a reflective-diffractive optical device, wherein the beam expanding lens is bonded and embedded at an incident end of the thread microprism light guide stick; the reflective-diffractive optical device is bonded and embedded at the tail end of the thread microprism light guide stick; the laser source is arranged in front of the beam expanding lens; the outer side wall of the thread microprism light guide stick is distributed with threads; the inside of the thread microprism light guide stick is distributed with scattered microparticles; and the reflective-diffractive optical device is provided with a pure phase structure. The invention can obtain a laser column source with lateral luminescence which has good luminescence uniformity and high color purity, can convert thin laser beams emitted by a laser into a laser column source with uniform lateral luminescence, can replace a CCFL light tube in a liquid crystal display backlight to realize the full color laser display, and can provide laser illumination for certain space in special application.

Description

technical field [0001] The invention relates to a side-emitting laser column light source, which belongs to the technical field of light source and laser display. Background technique [0002] The invention of the laser has brought a new kind of strong light source to mankind. During the development period of nearly 50 years, lasers based on different principles and working substances to meet different needs have been successfully developed. For example, according to the working substance, there are solid-state lasers, gas lasers, and semiconductor lasers. X-ray lasers, etc. The development of laser light sources not only drives the development of various disciplines and technologies, but also has been widely used in science and technology, industry, national defense, medical treatment and people's daily life. Laser has the characteristics of monochromaticity, directionality, excellent coherence and high brightness. The laser beam is generally a thin beam with a small dive...

AI Technical Summary

Problems solved by technology

[0003] Traditional LCD TVs and LCD monitors use cold cathode fluorescent tube (CCFL) backlight, which has mature technology and long service life, but there are also many disadvantages: First, the color gamut is small, generally only up to the NTSC color gamut 72% of the standard; second, cold cathode fluorescent tubes contain a small amount of mercury, which does not meet environmental protection standards; third, light leakage is common, it is difficult to start at low temperature, and the response time is slow

However, LED backlight also has its disadvantages. First, the brightness of LED is not high enough. Multiple LEDs need to be arranged in a linear array instead of CCFL or arranged in an area array, and the power consumption is relatively large. Second, the monochromaticity of LED light is far better than that of laser It is difficult to compare with the laser light source in terms of display color gamut, color saturation and color fidelity.

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