Display panel and display device

A holographic display method, comprising:

• providing a holographic display system, the holographic display system including:
• a backlight module, a spatial light modulator, and a plurality of liquid crystal grating modules that are sequentially arranged in a first direction, wherein:
• the backlight module is configured to emit a backlight beam,
• the spatial light modulator is configured to perform a phase modulation and an amplitude modulation on the backlight beam,
• the plurality of liquid crystal grating modules are sequentially disposed in the first direction, and based on a polarization direction of incident light, a liquid crystal grating module of the plurality of liquid crystal grating modules is capable of changing a propagation direction of the incident light or maintaining the propagation direction of the incident light, and
• a first optical rotator is disposed on a light-incident side of at least one liquid crystal grating module of the plurality of liquid crystal grating modules, and the first optical rotator is capable of rotating the polarization direction of the incident light, to make at least one liquid crystal grating module change the propagation direction of the incident light, and at least one liquid crystal grating module do not change the propagation direction of the incident light within a preset duration;
• emitting the backlight beam through the backlight module;
• performing a phase modulation and an amplitude modulation on the backlight beam through the spatial light modulator;
• and
• based on the first optical rotator, within the preset duration, making at least one liquid crystal grating module change the propagation direction of the incident light, and at least one liquid crystal grating module do not change the propagation direction of the incident light.

An electronic device, comprising:

• a holographic display system, the holographic display system including:
• a backlight module, a spatial light modulator, and a plurality of liquid crystal grating modules that are sequentially arranged in a first direction, wherein:
• the backlight module is configured to emit a backlight beam,
• the spatial light modulator is configured to perform a phase modulation and an amplitude modulation on the backlight beam,
• the plurality of liquid crystal grating modules are sequentially disposed in the first direction, and based on a polarization direction of incident light, a liquid crystal grating module of the plurality of liquid crystal grating modules is capable of changing a propagation direction of the incident light or maintaining the propagation direction of the incident light, and
• a first optical rotator is disposed on a light-incident side of at least one liquid crystal grating module of the plurality of liquid crystal grating modules, and the first optical rotator is capable of rotating the polarization direction of the incident light, to make at least one liquid crystal grating module change the propagation direction of the incident light, and at least one liquid crystal grating module do not change the propagation direction of the incident light within a preset duration.