公开(公告)号：US20240005885A1

公开(公告)日：2024-01-04

申请号：US18141908

申请日：2023-05-01

Applicant: Sharp Display Technology Corporation

Inventor： Masaki UEHATA ,  Yasuki MORI ,  Kohji SAITOH ,  Takayuki MIZUNAGA ,  Kazuya KONDOH ,  Takashi NOJIMA ,  Kazuhisa YOSHIMOTO ,  Kosuke KAWAMOTO ,  Hiroyuki KITO ,  Kazuki NAKAMICHI

IPC: G09G3/36

CPC classification number: G09G3/36 ,  G09G2310/0202 ,  G09G2310/0291 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2320/0209 ,  G09G2320/0247

Abstract: A common electrode driver includes an inverting amplifier including a first resistor, a second resistor, and an operational amplifier, and a resistance ratio adjustment circuit that adjusts, in accordance with a length of one horizontal scan period, a resistance ratio being a ratio of a resistance value of the second resistor to a resistance value of the first resistor. A feedback voltage is provided to one end of the first resistor. The resistance ratio adjustment circuit sets the resistance ratio when second driving is performed, in which a length of one horizontal scan period is a second time longer than a first time, to be smaller than the resistance ratio when first driving is performed, in which a length of one horizontal scan period is the first time.

公开(公告)号：US20250168946A1

公开(公告)日：2025-05-22

申请号：US18915545

申请日：2024-10-15

Applicant: Sharp Display Technology Corporation

Inventor： Hiroyuki KITO

IPC: H05B45/20 ,  H05B45/345

Abstract: A lighting device includes a first light emitting element, a second light emitting element, and a driving circuit driving the first light emitting element and the second light emitting element. The driving circuit includes a current supply supplying currents to the first light emitting element and the second light emitting element, a first current controller controlling a magnitude of a first current supplied from the current supply to the first light emitting element, and a second current controller controlling a magnitude of a second current supplied from the current supply to the second light emitting element.