A laser projection display method and device

Abstract

The embodiment of the invention provides a laser projection display method and device, relating to the field of projection display. The imaging quality of laser projection display can be improved on the basis that laser light energy is not lost, and the technical difficulty is low. The method comprises the following steps: inputting an original image; displaying the original image by adopting a laser light source when the number of pixels for displaying colors in a preset color group in the original image is greater than a first preset numerical value; and displaying the original image by adopting a mixed light source group or an LED light source group when the number of pixels for displaying colors in the preset color group in the original image is less than or equal to the first preset numerical value, wherein the colors in the preset color group refer to colors which can be displayed by the laser light source group only; the first preset numerical value is an integer greater than or equal to 0; and the mixed light source group comprises at least one LED light source and at least one laser light source. The method and device disclosed by the embodiment of the invention are used for projection display of images.

Description

technical field [0001] The invention relates to the field of projection display, in particular to a laser projection display method and device. Background technique [0002] Laser projection display is a projection display technology that uses red, green, and blue primary color lasers as light sources. Due to the good monochromaticity of lasers, when using lasers as display light sources, an ultra-wide color gamut can be obtained, thus having a richer color. Color performance, higher color saturation, so laser projection display technology has received widespread attention. However, due to the high coherence of the laser, the laser beam projected on the screen is scattered by the rough surface to form different wavelets, these different wavelets interfere with each other, and form many randomly distributed granular particles with uneven brightness and darkness after reaching the human eye. Intensity pattern, this granular intensity pattern is the laser speckle. Laser speck...

AI Technical Summary

Problems solved by technology

For example, a liquid crystal device can be inserted into the laser beam, and the phase modulation of the beam can be caused by the movement of the crystal through electric field excitation, and the phase modulation can be used to reduce the coherence of the laser beam, so as to reduce the laser speckle and improve the imaging quality of the laser projection display; or Beam splitters, such as prisms, fiber couplers, etc., can also be added to the laser light path to split the laser beams and reduce the coherence between laser sub-beams, thereby reducing laser speckle and improving laser projection display Imaging quality; when using the above method to improve the imaging quality of laser projection display, because of the need to set up a special laser speckle removal device, it is technically difficult to implement, and after the laser speckle removal device is introduced into the laser light path, the laser speckle removal The speckle elimination device may absorb or reflect a part of the laser light, which will easily cause the loss of laser light energy, and then affect the imaging quality of the laser projection display

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