Liquid crystal displays with optical sensors

A liquid crystal display device with an optical sensor comprising:

• a first substrate;
• a second substrate facing the first substrate;
• and
• a liquid crystal layer located between the first substrate and the second substrate, wherein
• the first substrate comprises:
• a first signal line that supplies a video signal to a first sub-pixel corresponding to red, a second signal line that supplies a video signal to a second sub-pixel corresponding to green, and a third signal line that supplies a video signal to a third sub-pixel corresponding to blue;
• an optical sensor comprising a photoelectric conversion element that outputs a detection signal in response to light incident from the liquid crystal layer side;
• a first power feeding line that supplies a first voltage to operate the optical sensor, a second power feeding line that supplies a second voltage to operate the optical sensor, and a third power feeding line that supplies a third voltage to operate the optical sensor;
• and
• a sensor signal line that outputs the detection signal,
• a sensor electrode that detects an approach or contact of an object;
• and
• a first detection wiring line and a second detection wiring line that are connected to the sensor electrode, wherein
• the first power feeding line is located between the third signal line and the first detection wiring line in a thickness direction of the liquid crystal display device,
• the second power feeding line is located between the second signal line and the second detection wiring line in the thickness direction,
• the third power feeding line is located between the first signal line and the sensor signal line in the thickness direction,
• the first detection wiring line and the second wiring line are arranged on the same layer as the sensor signal line,
• the second detection wiring line includes a branch portion overlapping the optical sensor in planar view, and
• the branch portion includes an opening that transmits light parallel to a normal direction of an upper surface of the photoelectric conversion element among light incident from the liquid crystal layer side.