Array substrate as extended fingerprint sensor, touch-display panel, and touch-display device using same

A display panel comprising an array substrate, a color filter substrate opposite to the array substrate, and a liquid crystal layer between the color filter substrate and the array substrate, the array substrate comprising:

• a substrate;
• a plurality of scan lines on the substrate and extending in a first direction;
• a plurality of data lines on the substrate and on a side of the plurality of scan lines away from the substrate, and extending in a second direction intersecting the first direction;
• a plurality of sub-pixels, an area surrounded by any two adjacent scan lines and any two adjacent data lines insulatively intersecting the two adjacent scan lines defines one sub-pixel, each of the plurality of sub-pixels comprising a pixel electrode and a first transistor, a drain electrode of the first transistor electrically connected to the pixel electrode, a source electrode of the first transistor electrically connected to one of the plurality of data lines, and a gate electrode of the first transistor electrically connected to one of the plurality of scan lines;
• a plurality of readout lines on the substrate and between the substrate and the plurality of scan lines;
• and
• a plurality of fingerprint recognition units, located in at least some of the plurality of sub-pixels, and each of the at least some of the plurality of sub-pixels comprising one of the plurality of fingerprint recognition units, wherein each of the plurality of fingerprint recognition units comprises a photodiode, the photodiode is electrically connected to one of the plurality of readout lines, and each of the plurality of readout lines is configured to read a photo-sensing signal generated by the photodiode to achieve fingerprint recognition.

A display device comprising a backlight module and a display panel, the display panel comprising an array substrate, a color filter substrate opposite to the array substrate, and a liquid crystal layer between the color filter substrate and the array substrate, and the backlight module is on a side of the array substrate away from the color filter substrate, the array substrate comprising:

• a substrate;
• a plurality of scan lines on the substrate and extending in a first direction;
• a plurality of data lines on the substrate and on a side of the plurality of scan lines away from the substrate, and extending in a second direction intersecting the first direction;
• a plurality of sub-pixels, an area surrounded by any two adjacent scan lines and any two adjacent data lines insulatively intersecting the two adjacent scan lines defines one sub-pixel, each of the plurality of sub-pixels comprising a pixel electrode and a first transistor, a drain electrode of the first transistor electrically connected to the pixel electrode, a source electrode of the first transistor electrically connected to one of the plurality of data lines, and a gate electrode of the first transistor electrically connected to one of the plurality of scan lines;
• a plurality of readout lines on the substrate and between the substrate and the plurality of scan lines;
• and
• a plurality of fingerprint recognition units, located in at least some of the plurality of sub-pixels, and each of the at least some of the plurality of sub-pixels comprising one of the plurality of fingerprint recognition units, wherein each of the plurality of fingerprint recognition units comprises a photodiode, the photodiode is electrically connected to one of the plurality of readout lines, and each of the plurality of readout lines is configured to read a photo-sensing signal generated by the photodiode to achieve fingerprint recognition.