TFT with improved light sensing and TFT substrate using the same and liquid crystal display

A display comprising:

• a light sensor comprising:
• a source region;
• a drain region;
• an intermediate region positioned between the source region and the drain region,
• a gate electrode associated with the source region and the drain region, the gate electrode including one or more openings over the intermediate region, wherein light incident from outside the display passes through the one or more openings and into the intermediate region, and the intermediate region is formed of a material that generates current upon receiving light incident from outside the display;
• and
• at least one pixel transistor, the at least one pixel transistor including an associated source region, an associated drain region, and an associated gate electrode, wherein the associated gate electrode does not include one or more openings;
• and
• wherein the display further comprises a chassis that covers the light sensor and has a light-transmitting part, and the light incident from outside the display passes through the light-transmitting part and the one or more openings into the intermediate region;
• and
• wherein the gate electrode is formed in a closed loop shape to surround the one or more openings in a plan view.