公开(公告)号：US20210150976A1

公开(公告)日：2021-05-20

申请号：US16953364

申请日：2020-11-20

Applicant: NOVATEK Microelectronics Corp.

Inventor： Hsu-Chih Wei ,  Po-Hsiang Fang ,  Keko-Chun Liang ,  Che-Wei Yeh ,  Ju-Lin Huang

IPC: G09G3/32

Abstract: The present disclosure provides a method for a display driver system and a display driver system. The method comprises: the control circuit transmitting a global signal and a first signal for a LED driver circuit in each stage to a first-stage LED driver circuit, wherein the global signal includes an command for indicating an operation mode of the LED driver circuit in each stage; the LED driver circuit in each stage determining the operation mode corresponding to the command according to the global signal, identifying a corresponding first signal of the LED driver circuit in the stage, and operating according to the determined operation mode and the corresponding first signal; and the LED driver circuit in each stage except for last stage transmitting the global signal to the LED driver circuit in its next stage, and in response to a completion of operation according to the determined operation mode and the corresponding first signal, transmitting the first signal for the LED driver circuit in each of sequential stages to the LED driver circuit in its next stage.

公开(公告)号：US20190243612A1

公开(公告)日：2019-08-08

申请号：US16159734

申请日：2018-10-15

Applicant: Novatek Microelectronics Corp.

Inventor： Che-Wei Yeh ,  Keko-Chun Liang ,  Yu-Hsiang Wang

IPC: G06F7/58 ,  H03K3/84 ,  H03M3/00

CPC classification number: G06F7/584 ,  H03K3/84 ,  H03M3/414

Abstract: A random bit stream generator which includes a pseudo-random bit stream generator and a multi-stage noise shaping (MASH) delta-sigma modulator is introduced. The pseudo-random bit stream generator may generate a first random bit stream according to a first clock signal. The MASH delta-sigma modulator is coupled to the first random bit stream generator to receive the first random bit stream and output a second random bit stream according to the first random bit stream and a second clock signal. A frequency of the second clock signal is greater than a frequency of the first clock signal, and the random bit stream has bell-shaped distribution. A method of generating a random bit stream having bell-shaped distribution adapted to a random bit stream generator is also introduced.