Photosensitive circuit and system for photosensitive display

A photosensitive circuit, comprises:

• a pixel unit comprising four pixels, wherein each pixel comprises a display element and a control circuit;
• and
• a photosensitive unit, coupled between the four pixels for generating a current at a readout line to sense a position of an object according to a reflected light or shadow portion when the light from the display element is reflected by the object or ambient light is covered by the object,
• wherein the photosensitive unit comprises at least one photosensitive element, coupled between a first gate line and the readout line;
• and
• wherein the photosensitive element is a photo transistor, having a control terminal directly connected to a second gate line.

A photosensitive display system, comprising:

• an array of pixels, wherein each pixel comprises a photosensitive circuit, wherein the photosensitive circuit comprises:
• a display element for generating light, transmitting light or reflecting light;
• a control circuit, coupled to the display element, for controlling light intensity of the display element according to a data line and a gate line;
• and
• a photosensitive element, coupled between the gate line and a readout line, for generating a current to sense a position of an object according to a reflected light or shadow portion when the light from the display element is reflected by the object or ambient light is covered by the object;
• wherein the photosensitive element is a photo transistor, having a control terminal directly connected to a gate line of another pixel.

A photosensitive display system, comprising:

• an array of photosensitive circuit, wherein each photosensitive circuit comprises:
• a pixel unit comprising four pixels, wherein each pixel comprises a display element and a control circuit;
• and
• a photosensitive unit, coupled between the four pixels for generating a current at a readout line to sense a position of an object according to a reflected light or shadow portion when the light from the display element is reflected by the object or ambient light is covered by the object,
• wherein the photosensitive unit comprises at least one photosensitive element, coupled between a first gate line and the readout line;
• and
• wherein the photosensitive element is a photo transistor, having a control terminal directly connected to a second gate line.