US 11,055,508 B2
Display panel applicable to reducing noise coupling and enhancing sensing signal in optical fingerprint sensor thereof with aid of switch arrangement, and associated electronic device
Jia-Ming He, Tainan (TW); Yaw-Guang Chang, Tainan (TW); and I-Lin Wu, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Aug. 29, 2019, as Appl. No. 16/556,192.
Prior Publication US 2021/0064835 A1, Mar. 4, 2021
Int. Cl. G09G 3/3233 (2016.01); G06K 9/00 (2006.01); G09G 3/20 (2006.01); G09G 3/3241 (2016.01)
CPC G06K 9/0004 (2013.01) [G09G 3/20 (2013.01); G09G 3/3241 (2013.01); G09G 2300/0426 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A display panel, comprising:
a plurality of display blocks, arranged to display images, wherein each of the plurality of display blocks comprises one or more display units;
a plurality of light sensors, arranged to perform light sensing, wherein the display panel utilizes at least one portion of the plurality of display blocks as at least one light source for performing the light sensing;
a plurality of sets of switches, coupled to the plurality of light sensors, arranged to combine the plurality of light sensors into a plurality of combined sensors, respectively, wherein the plurality of sets of switches operate according to a plurality of switching signals, respectively; and
a detection circuit, coupled to a first set of combined sensors and a second set of combined sensors within the plurality of combined sensors, arranged to detect a voltage level of a combined sensor of the first set of combined sensors according to a reference voltage level, for performing fingerprint detection through the display panel, wherein the reference voltage level is obtained from the second set of combined sensors.