System and method for dynamically adjusting color gamut of display system, and display system

A method for dynamically adjusting a color gamut of a display system, wherein the display system comprises a light source system and an imaging system, the light source system comprising an excitation light source and a narrow-spectrum primary-color light source, the imaging system comprising a spatial light modulation device, wherein the excitation light source emits excitation light which is processed to output primary-color light including at least one broad-spectrum primary-color light, the narrow-spectrum primary-color light source outputs at least one narrow-spectrum primary-color light, and the narrow-spectrum primary-color light and corresponding broad-spectrum primary-color light are combined and outputted to the imaging system, and wherein the method comprises:

• calculating color coordinates (x, y) and luminance of a pixel point with a maximum luminance Ymax in a frame of an image;
• calculating a desired minimum luminance of the broad-spectrum primary-color light based on color coordinates and luminance of primary-color light outputted by the light source system and the color coordinates and the luminance of the pixel point with the maximum luminance, and calculating a luminance control value for controlling the excitation light source based on the desired minimum luminance of the broad-spectrum primary-color light;
• calculating a desired luminance of the narrow-spectrum primary-color light based on the desired minimum luminance of the broad-spectrum primary-color light, and calculating a luminance control value for controlling the narrow-spectrum primary-color source based on the desired luminance of the narrow-spectrum primary-color light;
• and
• generating a light source luminance signal of the excitation light source based on the luminance control value for controlling the excitation light source, and generating a light source luminance signal of the narrow-spectrum primary-color light source based on the luminance control value for controlling the narrow-spectrum primary-color light source, and outputting the light source luminance signals to the excitation light source and the narrow-spectrum primary-color light source respectively to adjust luminance of light emitted by the excitation light source and luminance of light emitted by the narrow-spectrum primary-color light source.

A display system, comprising a light source system and an imaging system, the light source system comprising an excitation light source and a narrow-spectrum primary-color light source, wherein the excitation light source outputs excitation light which is processed to output primary-color light including at least one broad-spectrum primary-color light, the narrow-spectrum primary-color light source outputs at least one narrow-spectrum primary-color light, and the narrow-spectrum primary-color light and corresponding broad-spectrum primary-color light are combined and outputted to the imaging system, and wherein the imaging system comprises a spatial light modulation device and a system for dynamically adjusting a color gamut of a display system, and wherein the method for dynamically adjusting the color gamut of the display system comprises:

• a light source luminance adjustment module comprising:
• a brightest pixel point acquisition module configured to calculate color coordinates and luminance of a pixel point with a maximum luminance in a frame of an image;
• a broad-spectrum primary-color light luminance generation module configured to calculate a desired minimum luminance of the broad-spectrum primary-color light based on color coordinates and luminance of the primary-color light outputted by the light source system and the color coordinates and the luminance of the pixel point with the maximum luminance, and to calculate a luminance control value for controlling the excitation light source based on the minimum luminance;
• a narrow-spectrum primary-color light luminance generation module configured to calculate a desired luminance of the narrow-spectrum primary-color light based on the desired minimum luminance of the broad-spectrum primary-color light, and to calculate a luminance control value for controlling the narrow-spectrum primary-color light source based on the desired luminance of the narrow-spectrum primary-color light;
• and
• a luminance signal output module configured to generate a light source luminance signal of the excitation light source based on the luminance control value of the broad-spectrum primary-color light, and generate a light source luminance signal of the narrow-spectrum primary-color light source based on the luminance control value of the narrow-spectrum primary-color light;
• and to output the light source luminance signals to the excitation light source and the narrow-spectrum primary-color light source respectively to adjust luminance of light emitted by the excitation light source and luminance of light emitted by the narrow-spectrum primary-color light source.