Optical fingerprint/palmprint identification device, touch display panel and display apparatus

An optical fingerprint/palmprint identification device, comprising:

• a photosensitive sensor configured for acquiring an optical signal indicative of fingerprint/palmprint information, and converting the acquired optical signal into a current;
• a storage capacitor configured as a separate capacitor in the optical fingerprint/palmprint identification device and electrically connected to the photosensitive sensor so as to receive and store the current from the photosensitive sensor during scanning a fingerprint/palmprint;
• and
• a switch transistor electrically connected to the storage capacitor so as to output the current stored in the storage capacitor during reading out a current;
• wherein the photosensitive sensor comprises a photosensitive diode comprising a first electrode layer, a photosensitive material layer and a second electrode layer stacked in sequence from bottom to top;
• and
• wherein the first electrode layer is electrically connected to the storage capacitor, the photosensitive material layer is configured to generate current carriers when irradiated by light reflected by the fingerprint/palmprint, and the second electrode layer is made of transparent material or has a transparent structure and is electrically connected to a fixed voltage source.