Touch panel being able to realize force touch and touch detection method thereof and display device

A touch detection method for a touch panel, wherein the touch panel comprises a base substrate, having a touch surface which is configured to receive a touch operation;

• a plurality of transmitter groups, each of the plurality of transmitter groups comprises a plurality of transmitters, the transmitters are configured to emit light;
• and a receiver, configured to receive light emitted by the transmitters, the base substrate is configured to produces a deformation upon receiving the touch operation, the light received by the receiver corresponds to the deformation, the touch panel further comprises a light shield layer, the light shield layer is disposed between the base substrate and the transmitter groups, the light shield layer is configured to prevent light from the touch surface which has a wavelength the same as that of the light emitted by the plurality of transmitters from entering the receiver, the light shield layer is a photonic crystal layer, the touch detection method comprises:
• using the plurality of transmitters to emit the light parallel to the touch surface, and making the light enter the receiver disposed corresponding thereto;
• and
• detecting whether the receiver receives the light to judge whether a touch operation occurs.