US 11,922,880 B2
Current supply circuit and display device including the same
Jong Min Lee, Daejeon (KR); Kyeong Rok Lee, Daejeon (KR); Sang Suk Kim, Daejeon (KR); and Jang Su Kim, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX Semicon Co., Ltd., Daejeon (KR)
Filed on Nov. 22, 2022, as Appl. No. 17/992,474.
Claims priority of application No. 10-2021-0174843 (KR), filed on Dec. 8, 2021.
Prior Publication US 2023/0178024 A1, Jun. 8, 2023
Int. Cl. G09G 3/3241 (2016.01)
CPC G09G 3/3241 (2013.01) [G09G 2310/027 (2013.01); G09G 2320/0233 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A current supply circuit comprising:
a voltage/current converter configured to convert a data voltage, received from a data driving circuit, into a data current; and
a first current mirror circuit configured to mirror the data current so that a light-emitting diode (LED) current flows into an LED array; and
a compensation current generation circuit connected to the voltage/current converter and configured to adjust the data current transmitted to the first current mirror circuit, wherein
the data current has a first change rate in a first greyscale section and a second change rate in a second greyscale section in relation to the data voltage, and
the compensation current generation circuit includes a first current source comprising a transistor configured to output a base current defined by the data voltage, and a second current source configured to form a common node by being electrically connected to one terminal of the first current source and to output a direct current.