公开(公告)号：US20230005441A1

公开(公告)日：2023-01-05

申请号：US17855606

申请日：2022-06-30

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Hung-Ho Huang ,  Kang-Fan Yeh ,  Po-Hsiang Fang

IPC: G09G3/34 ,  G09G3/36

Abstract: A backlight driving device and an operating method thereof are provided to drive multiple backlight zones of a backlight panel. The backlight driving device includes an interface circuit and a driving circuit. The interface circuit receives main backlight data corresponding to a first backlight zone from a former stage device. The driving circuit drives the first backlight zone according to a main current level in a display refresh period of a backlight frame period, does not drive the first backlight zone in a demotion blur period which is prior to the display refresh period, and drives the first backlight zone according to a compensation current level in a vertical blanking period which succeeds the display refresh period. The driving circuit determines the main current level according to the main backlight data, and the compensation current level is lower than the main current level.

公开(公告)号：US12051381B2

公开(公告)日：2024-07-30

申请号：US18167896

申请日：2023-02-13

Applicant: Novatek Microelectronics Corp.

Inventor： Yi-Yang Tsai ,  Hung-Ho Huang ,  Tzong-Honge Shieh ,  Chieh-An Lin ,  Po-Hsiang Fang ,  Jhih-Siou Cheng

IPC: G09G3/34

CPC classification number: G09G3/3406 ,  G09G2310/0237 ,  G09G2320/0261 ,  G09G2320/064 ,  G09G2330/021 ,  G09G2370/00

Abstract: The disclosure provides a control method of a display driver. The control method includes receiving address information and defining an IC address according to the address information. The IC address includes n bits representing k zones, and n and k are positive integers. The control method further includes receiving the IC address, a black frame data signal and a pulse-width modulation (PWM) signal, and turning on or off the plurality of LEDs in the corresponding zone according to toggle of bit in the black frame data signal. Each bit in the black frame data signal indicates that a plurality of LEDs in a zone among the k zones are turned on or off.

公开(公告)号：US20240096289A1

公开(公告)日：2024-03-21

申请号：US18167896

申请日：2023-02-13

Applicant: Novatek Microelectronics Corp.

Inventor： Yi-Yang Tsai ,  Hung-Ho Huang ,  Tzong-Honge Shieh ,  Chieh-An Lin ,  Po-Hsiang Fang ,  Jhih-Siou Cheng

IPC: G09G3/34

CPC classification number: G09G3/3406 ,  G09G2310/0237 ,  G09G2320/0261 ,  G09G2320/064 ,  G09G2330/021 ,  G09G2370/00

Abstract: The disclosure provides a control method of a display driver. The control method includes receiving address information and defining an IC address according to the address information. The IC address includes n bits representing k zones, and n and k are positive integers. The control method further includes receiving the IC address, a black frame data signal and a pulse-width modulation (PWM) signal, and turning on or off the plurality of LEDs in the corresponding zone according to toggle of bit in the black frame data signal. Each bit in the black frame data signal indicates that a plurality of LEDs in a zone among the k zones are turned on or off.

公开(公告)号：US11651746B2

公开(公告)日：2023-05-16

申请号：US17855606

申请日：2022-06-30

Applicant: Novatek Microelectronics Corp.

Inventor： Jhih-Siou Cheng ,  Hung-Ho Huang ,  Kang-Fan Yeh ,  Po-Hsiang Fang

IPC: G09G3/34 ,  G09G3/36

CPC classification number: G09G3/3426 ,  G09G3/36 ,  G09G2310/0297 ,  G09G2320/0646 ,  G09G2360/16

Abstract: A backlight driving device and an operating method thereof are provided to drive multiple backlight zones of a backlight panel. The backlight driving device includes an interface circuit and a driving circuit. The interface circuit receives main backlight data corresponding to a first backlight zone from a former stage device. The driving circuit drives the first backlight zone according to a main current level in a display refresh period of a backlight frame period, does not drive the first backlight zone in a demotion blur period which is prior to the display refresh period, and drives the first backlight zone according to a compensation current level in a vertical blanking period which succeeds the display refresh period. The driving circuit determines the main current level according to the main backlight data, and the compensation current level is lower than the main current level.