US 11,815,754 B2
Display device and method of driving the same
Kyo Won Ku, Seoul (KR); Jung Hak Kim, Hwaseong-si (KR); Young Sik Kim, Yongin-si (KR); Jin Woo Kim, Hwaseong-si (KR); Jeong Heon Lee, Yongin-si (KR); and Hee Yeon Choi, Cheonan-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Apr. 20, 2021, as Appl. No. 17/235,475.
Claims priority of application No. 10-2020-0100899 (KR), filed on Aug. 12, 2020.
Prior Publication US 2022/0050317 A1, Feb. 17, 2022
Int. Cl. G02F 1/1333 (2006.01); G02F 1/1503 (2019.01); G02F 1/155 (2006.01); G02F 1/1335 (2006.01); G09F 9/30 (2006.01); G09G 3/36 (2006.01); G06V 40/13 (2022.01); G06V 40/12 (2022.01)
CPC G02F 1/13338 (2013.01) [G02F 1/133524 (2013.01); G02F 1/133526 (2013.01); G02F 1/1503 (2019.01); G02F 1/155 (2013.01); G06V 40/1306 (2022.01); G09F 9/301 (2013.01); G09G 3/3696 (2013.01); G02F 2001/1555 (2013.01); G06V 40/1341 (2022.01)] 16 Claims
OG exemplary drawing
 
1. A display device, comprising:
a first display panel for displaying a first image;
a fingerprint sensor disposed on one surface of the first display panel and detecting light passing through the first display panel; and
a first light transmission control unit disposed between the first display panel and the fingerprint sensor for controlling transmission of light,
wherein the first light transmission control unit includes:
a first base substrate and a second base substrate facing each other;
a first electrode disposed on one surface of the first base substrate;
a second electrode disposed on one surface of the second base substrate facing the first base substrate; and
a light transmission control layer disposed between the first electrode and the second electrode, and
the light transmission control layer includes:
an electrochromic layer disposed on one surface of the second electrode facing the first electrode and configured to change a color according to an oxidation-reduction reaction by a first driving voltage applied to the first electrode and a second driving voltage applied to the second electrode;
a counter layer disposed on one surface of the first electrode facing the second electrode and located between the first electrode and the electrochromic layer for assisting the oxidation-reduction reaction of the electrochromic layer; and
an electrolyte layer disposed between the electrochromic layer and the counter layer for providing cations and anions to cause the oxidation-reduction reaction in the electrochromic layer and the counter layer.