Multimodal display device and display method thereof

A display device, comprising:

• a backlight module configured to emit coherent light and incoherent light selectively;
• a spatial light modulator configured to display one of at least two types of image information;
• a liquid crystal lens;
• and
• a control module,
• wherein the spatial light modulator and the liquid crystal lens are sequentially disposed on a light exit path of the backlight module,
• wherein the liquid crystal lens comprises a first substrate, a first electrode formed on the first substrate, and a second electrode formed on a surface of the spatial light modulator facing the first substrate,
• wherein the first substrate is disposed opposite to the spatial light modulator, and liquid crystal molecules are formed between the first electrode and the second electrode,
• wherein the control module is configured to control light emitted by the backlight module to switch between the coherent light and the incoherent light, provide any one of at least two types of image information to the spatial light modulator and control deflection of liquid crystal molecules in the liquid crystal lens, and control the spatial light modulator to display an image based on the provided image information,
• wherein the backlight module comprises a light emitting unit and a collimator lens, wherein the collimating lens and the spatial light modulator are sequentially disposed on a light exit path of the light emitting unit, and the light emitting unit and the control module are electrically connected, and
• wherein the light emitting unit comprises a coherent light source and an incoherent light source, and the control module is configured to control the coherent light source and the incoherent light source to alternately emit light, thereby switching the light emitted by the backlight module between the coherent light and the incoherent light.