US 11,721,301 B1
Charging compensation device, display terminal, and charging compensation method
Qingsheng Lan, Guangdong (CN); and Youngil Ban, Guangdong (CN)
Assigned to TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
Filed by TCL China Star Optoelectronics Technology Co., Ltd., Guangdong (CN)
Filed on Aug. 29, 2022, as Appl. No. 17/897,333.
Claims priority of application No. 202210882486.0 (CN), filed on Jul. 26, 2022.
Int. Cl. G09G 3/20 (2006.01); G09G 3/36 (2006.01)
CPC G09G 3/3688 (2013.01) [G09G 2310/0291 (2013.01); G09G 2310/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A charging compensation device, wherein the charging compensation device is applied to a display panel, the display panel comprises a plurality of pixel units arranged in an array, and the charging compensation device comprises:
a timing control module configured to send a display data and a current row number information of the display panel;
a driving module electrically connected to the timing control module, configured to divide the display data into at least two charging intervals according to a received row number information, and configured to determine a plurality of charging currents according to the at least two charging intervals, wherein each of the charging intervals corresponds to the display data of multiple rows of the pixel units, and distances between the pixel units corresponding to each of the charging intervals and the driving module are different; and
an output module electrically connected to the driving module and configured to charge the display panel according to the plurality of charging currents;
wherein the driving module further comprises an interval control module, the interval control module is electrically connected with the timing control module, and the interval control module is configured to divide the display data into the at least two charging intervals according to a received row number information;
wherein the driving module further comprises a current control module, the current control module is electrically connected with the interval control module, and the current control module is configured to determine the plurality of charging currents according to the at least two charging intervals; and
wherein the output module further comprises an operational amplifier, the operational amplifier comprises a first power supply terminal, a second power supply terminal, a positive input terminal, a negative input terminal, and an operational amplifier output terminal, wherein:
the first power supply terminal is electrically connected to the current control module;
the second power supply terminal is grounded;
the positive input terminal is configured to receive the display data corresponding to the charging interval;
the negative input terminal is electrically connected to the output terminal of the operational amplifier; and
the operational amplifier output terminal is configured to output a driving signal corresponding to the charging interval.