Liquid-crystal display device

A liquid-crystal display device, comprising:

• a display panel comprising a display region, wherein the display region comprises a first display region and a second display region, and the second display region further serves as a light sensing element region;
• a backlight module configured to provide backlight for the display panel and provided with a via penetrating through the backlight module, wherein in a direction perpendicular to a light-emitting surface of the display panel, the via overlaps the light sensing element region;
• and
• a fingerprint identification module disposed inside the via and comprising a fingerprint identification sensor, a light plate, and a quantum dot film, wherein the light plate is disposed between the fingerprint identification sensor and the quantum dot film, and the quantum dot film is disposed between the light plate and the display panel;
• wherein the quantum dot film comprises at least one quantum dot set;
• the at least one quantum dot set comprises infrared quantum dots;
• during a fingerprint identification, light emitted from the light plate comprises first light and second light;
• the first light is configured to irradiate the infrared quantum dots and generate infrared light;
• the fingerprint identification sensor is configured to perform fingerprint identification according to infrared light reflected by a touched body;
• and the second light is configured to not irradiate the infrared quantum dots and is used for providing backlight for the display panel.