Display panel having total reflection interface formed by low refraction layer and high refraction layer, and display device

A display panel, comprising a display area and a light-transmitting area, wherein the display area is configured to display a screen, and a light-transmitting area is configured to transmit ambient light;

• wherein the display area comprises a first display area and a second display area, and the first display area and the light-transmitting area constitute a transparent display area;
• wherein the display area comprises:
• a display substrate comprising a light-emitting area and a non-light-emitting area surrounding the light-emitting area;
• a low refraction layer arranged on an emergent light side of the display substrate, wherein an orthographic projection of the low refraction layer on the display substrate is located in the non-light-emitting area;
• and
• a high refraction layer arranged on a side of the low refraction layer facing away from the display substrate, wherein the high refraction layer is configured to cover at least the light-emitting area and a side surface of the low refraction layer facing the light-emitting area;
• wherein a refractive index of the high refraction layer is greater than the refractive index of the low refraction layer, the side surface of the low refraction layer facing the light-emitting area and the high refraction layer are in contact with each other to form a total reflection interface, wherein the total reflection interface is configured to allow display light emitted from the light-emitting area and incident through the high refraction layer to perform total reflection.