Display device for fingerprint identification and control method thereof

A display device, comprising a display panel including a plurality of photosensitive sensing units, and the display device further comprising:

• a light-transmitting hole forming layer, a liquid crystal lens layer, and a light guide layer arranged on a display side of the display panel and in sequence in a direction away from the display panel, and a light source arranged on a side of the light guide layer,
• wherein the light-transmitting hole forming layer is configured to be switchable between a light-transmitting state and a pinhole state, wherein the pinhole state is a state in which the light-transmitting hole forming layer form light-transmitting holes facing each photosensitive sensing unit;
• the liquid crystal lens layer is configured to be switchable between a non-lens state and a lens state, wherein the lens state is a state in which the liquid crystal lens layer forms convex lenses facing each photosensitive sensing unit,
• wherein for a respective photosensitive sensing unit of the plurality of photosensitive sensing units, a center of the respective photosensitive sensing unit, a center of the light-transmitting hole facing the respective photosensitive sensing unit, and a center of the convex lens facing the respective photosensitive sensing unit are on a same respective vertical connection line,
• when the liquid crystal lens layer is in the lens state, adjacent convex lenses are arranged to adjoin one another in a direction parallel to the display panel, and
• an aperture of each convex lens is D0, a vertical distance from the center of the convex lens to the center of the light-transmitting hole facing the convex lens is H0, and a vertical distance from the center of the light-transmitting hole to the photosensitive sensing unit facing the light-transmitting hole is H1, and a width range
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• of the photosensitive sensing unit is greater than or equal to where
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