US 11,940,706 B2
Backplane, dimming method thereof, and display device having same
Yanan Wang, Shenzhen (CN)
Assigned to TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
Appl. No. 16/960,553
Filed by TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
PCT Filed May 19, 2020, PCT No. PCT/CN2020/090940
§ 371(c)(1), (2) Date Jul. 8, 2020,
PCT Pub. No. WO2021/203525, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 202010274405.X (CN), filed on Apr. 9, 2020.
Prior Publication US 2023/0122047 A1, Apr. 20, 2023
Int. Cl. G02F 1/19 (2019.01); G02F 1/01 (2006.01)
CPC G02F 1/19 (2013.01) [G02F 1/0121 (2013.01); G02F 2203/055 (2013.01); G02F 2203/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A backplane, comprising:
a first substrate and a second substrate opposite to each other;
an electrolyte layer disposed between the first substrate and the second substrate, and including an electrolytic solution; and
a driving electrode connected to the first substrate and the second substrate, respectively;
wherein
when the driving electrode is controlled not to apply voltage to the first substrate and the second substrate, the backplane is in a transparent state;
when the driving electrode is controlled to apply a first voltage to the first substrate and the second substrate, the electrolytic solution is electrolyzed to form metal agglomerates which attach to a surface of the first substrate, and thus the backplane is in a semi-transparent state;
when the driving electrode is controlled to apply a second voltage to the first substrate and the second substrate, the electrolytic solution is electrolyzed to form metal particles which attach to the surface of the first substrate to form a metal layer, and thus the backplane is in a reflective state; and
when the driving electrode is controlled to apply a third voltage to the first substrate and the second substrate, the electrolytic solution is electrolyzed to form metal particles which attach to the surface of the second substrate, and thus the backplane is in a dark state;
wherein one side of the first substrate is a light incoming surface, the driving electrode comprises an anode and a cathode, the anode is connected to the first substrate, and the cathode is connected to the second substrate, wherein when the first voltage is applied, an initial value of the first voltage is a transient high voltage to cause that the electrolytic solution is electrolyzed to form the metal agglomerates; after the first voltage is applied for a certain time, a low voltage is applied and maintained to cause that the metal particles attach to the surface of the first substrate to form agglomerates, and thus the backplane is in the semi-transparent state.