| CPC G06F 3/0412 (2013.01) [G06F 3/0446 (2019.05); G06F 3/0448 (2019.05); G06F 3/04164 (2019.05); G06F 3/04166 (2019.05); G06V 40/1306 (2022.01)] | 20 Claims |
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1. A display device comprising:
a display panel;
a plurality of first sensing electrodes disposed on the display panel, the plurality of first sensing electrodes including a first group of sensing electrodes and a second group of sensing electrodes;
a plurality of second sensing electrodes disposed on the first sensing electrodes and isolated from the first sensing electrodes, the plurality of second sensing electrodes including a third group of sensing electrodes and a fourth group of second sensing electrodes; and
a sensor controller configured to provide a transmit signal of an active level to each of the plurality of first sensing electrodes in a first sensing mode, wherein active periods of transmit signals provided to the first sensing electrodes of the first group in the first sensing mode do not overlap each other,
wherein a wire width of each first sensing electrode of the second group is smaller than a wire width of each first sensing electrode of the first group,
wherein a wire width of each second sensing electrode of the fourth group is smaller than a wire width of each second sensing electrode of the third group,
wherein a first portion of each first sensing electrode of the second group and a first portion of each second sensing electrode of the fourth group is disposed in a fingerprint sensing area and a second portion of each first sensing electrode of the second group and a second portion of each second sensing electrode of the fourth group is disposed in a non-fingerprint sensing area,
wherein the sensor controller sequentially provides transmit signals of an active level to the first sensing electrodes of the second group in a second sensing mode,
wherein the sensor controller maintains the transmit signals provided to the first sensing electrodes of the first group at an inactive level in the second sensing mode,
wherein, in the first sensing mode, first active periods of the transmit signals provided to a first electrode and a second electrode among the first sensing electrodes of the second group overlap each other, second active periods of the transmit signals provided to a third electrode and a fourth electrode among the first sensing electrodes of the second group overlap each other, and the first active periods and the second active periods do not overlap, and
wherein, in the first sensing mode, the active periods of transmit signals provided to the first sensing electrodes of the first group and the first active periods and the second active periods do not overlap each other.
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