Display panel, display module and display method thereof, and display device

A display module comprising a backlight module and a display panel, the display panel comprising a driving circuit and a photosensor and the photosensor is electrically connected with the driving circuit;

• wherein, when the backlight module receives a backlight control signal, the backlight module generates an optical signal based on the backlight control signal, the backlight control signal converted from a display signal output from a host;
• and
• wherein the photosensor detects the optical signal, converts the optical signal into an electric signal, and transmits the electric signal to the driving circuit, such that the driving circuit drives the display panel to display an image.

A display method for a display module, wherein the display method comprises:

• receiving a backlight control signal and emitting light based on a light emission frequency indicated by the backlight control signal by a backlight module, wherein the backlight control signal is converted from a display signal output from a host, and wherein the backlight control signal carries the light emission frequency;
• and
• detecting an optical signal generated by the backlight module based on the backlight control signal, converting the optical signal into an electric signal, and transmitting the electric signal to a driving circuit by a photosensor, such that the driving circuit drives a display panel to display an image.