Display apparatuses, display panels and preparation methods of display panel

A preparation method of a display panel, comprising:

• providing a substrate;
• forming a plurality of drive transistors, a plurality of reading transistors and a plurality of Schottky photodiodes on the substrate, wherein the drive transistors, the reading transistors and the Schottky photodiodes are formed at a same side of the substrate, each of the Schottky photodiodes comprises a photosensitive active layer and an interdigital electrode layer;
• the interdigital electrode layer is formed on the photosensitive active layer and comprises one or more first interdigital electrodes and one or more second interdigital electrodes formed at intervals, the one or more first interdigital electrodes are connected to one corresponding reading transistor, and the one or more second interdigital electrodes are connected to a bias signal terminal;
• forming a plurality of light-emitting units, wherein the light-emitting units are formed at a same side of the substrate as the drive transistors and connected with the drive transistors one-to-one;
• and
• disposing a cover plate, wherein the drive transistors, the reading transistors, the Schottky photodiodes and the light-emitting units are located between the substrate and the cover plate;
• wherein forming the Schottky photodiodes on the substrate comprises:
• forming the plurality of photosensitive active layers on the substrate, wherein the photosensitive active layers are formed at a same side of the substrate as the drive transistors;
• forming a plurality of recesses on each of the photosensitive active layers;
• and
• forming the plurality of interdigital electrode layers filling the recesses on each of the photosensitive active layers.

A display panel, comprising:

• a substrate and a cover plate, disposed oppositely;
• a plurality of drive transistors, disposed on the substrate and located at a side of the substrate facing toward the cover plate;
• a plurality of reading transistors, disposed on the substrate and located at a side of the substrate facing toward the cover plate;
• a plurality of Schottky photodiodes, disposed on the substrate and located at a side of the substrate facing toward the cover plate and each of the Schottky photodiodes comprising:
• a photosensitive active layer;
• and
• an interdigital electrode layer, wherein the interdigital electrode layer is disposed on the photosensitive active layer and comprises at least one first interdigital electrode and at least one second interdigital electrode spaced apart, the at least one first interdigital electrode is connected to a corresponding one of the reading transistors, and each of the at least one second interdigital electrode is connected to a bias signal terminal;
• and
• a plurality of light-emitting units, disposed between the substrate and the cover plate and connected to the drive transistors one-to-one;
• wherein each of the drive transistors comprises:
• a first active layer, disposed on the substrate and arranged with the photosensitive active layer on a same layer.