Display equipment and control method thereof

Abstract

The invention provides display equipment and a control method thereof. The display equipment comprises a control device, a light source system and a light modulation device, wherein the control deviceis used for converting original image data based on three primary colors of each pixel in each frame of to-be-displayed image into pixel modulation data based on four primary colors of each pixel; the light source system is used for emitting four kinds of primary light corresponding to the four primary colors, and the four kinds of primary light comprise laser light of three primary colors and fluorescent light of one primary color; and the light modulation device is used for modulating the four kinds of primary light emitted by the light source system according to the pixel modulation data based on the four primary colors of each pixel in each frame of to-be-displayed image so as to obtain image light of the to-be-displayed image. According to the invention, laser light of three primarycolors is used for image modulation, the color gamut displayed by the laser light of the three primary colors can completely cover the color gamut which can be reached by a pure-color exciting light source, and the speckle contrast ratio can be reduced while the fluorescent light is added as the primary light to more efficiently reach the required brightness.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a display device and a control method thereof. Background technique [0002] This section is intended to provide a background or context to a detailed description of the invention that is recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] The light sources of laser projection equipment are divided into two categories. One is to excite phosphors of different colors by short-wavelength lasers to generate primary color light of the three primary colors of red, green, and blue. Another type directly uses red, green and blue three-color lasers as the three primary color light sources. [0004] For the solution of laser excitation of phosphor powder, because the gallium nitride-based semiconductor blue laser has the characteristics of high efficiency, long life, and stable operation, the scheme of using blue...

AI Technical Summary

Problems solved by technology

RGB laser projection systems also have many disadvantages

The first disadvantage is speckle

Speckle is due to the coherence of the laser, which causes the light reflected on the projection plane to interfere due to the phase difference caused by the fluctuation of the plane, resulting in uneven brightness distribution of the projection screen.

Although there are many inventions trying to solve the problem of laser speckle, the results are not satisfactory

The second disadvantage is the high cost of the RGB system

In high-brightness projection equipment, this also means that a high-power cooling device is required to ensure a stable operating temperature of the red laser, which greatly increases the cost of the RGB laser projection system

Images