公开(公告)号：US11783765B1

公开(公告)日：2023-10-10

申请号：US18177712

申请日：2023-03-02

Applicant: Richtek Technology Corporation

Inventor： Chia-Jung Chang ,  Shao-Ming Chang ,  Hsiang-Feng Yu ,  Tso-Yu Wu ,  Yu-Pin Tseng

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2310/0248 ,  G09G2310/0267 ,  G09G2310/0275 ,  G09G2310/0278 ,  G09G2320/0257 ,  G09G2330/021

Abstract: A light emitting diode (LED) driver circuit is configured to drive plural LEDs which are respectively coupled to m scan-lines and n data-lines, wherein m and n are both integers greater than or equal to one. During a driving stage, each of the LEDs is controlled to emit light according to the electrical characteristics on the corresponding scan-line and on the corresponding data-line where the LED is coupled to. The LED driver circuit includes: a power saving control circuit which includes a storage capacitor; a pre-discharging circuit configured to pre-discharge the charges on the m scan-lines to the storage capacitor during a pre-discharging stage; and a pre-charging circuit configured to pre-charge the n data-lines by the charges stored in the storage capacitor during a pre-charging stage.