Display panel, optical sensor, and measurement method

A display panel, comprising:

• a first substrate;
• a shading module disposed on the first substrate;
• a second substrate disposed corresponding to the first substrate;
• a plurality of optical sensors disposed on the second substrate and disposed corresponding to the shading module, wherein the optical sensors are configured to output a plurality of first sensing signals according to a shift amount between the optical sensors and the shading module;
• and
• a parallel-to-serial converter configured to receive the first sensing signals to generate a serial signal,
• wherein one of the optical sensors is configured to receive a first system voltage and a second system voltage, and the first system voltage is higher than the second system voltage.

A measurement method for measuring a display panel, the measurement method comprising:

• outputting, by a plurality of optical sensors, a plurality of sensing signals according to a shift amount between the optical sensors and a plurality of black matrixes in the display panel,
• wherein one of the optical sensors comprises a first switch and a second switch, a first terminal of the first switch is configured to receive a first system voltage, a second terminal of the first switch is configured to output one of the first sensing signals, a control terminal of the first switch is coupled to the second terminal of the first switch, a first terminal of the second switch is coupled to the second terminal of the first switch, a second terminal of the second switch is configured to receive a second system voltage, the first system voltage is higher than the second system voltage, and a control terminal of the second switch is coupled to the second terminal of the second switch;
• and
• outputting, by a parallel-to-serial converter, a serial signal according to the sensing signals to determine the shift amount according to the serial signal.