公开(公告)号：US20240069675A1

公开(公告)日：2024-02-29

申请号：US17898393

申请日：2022-08-29

Applicant: Novatek Microelectronics Corp.

Inventor： Shih Hua Lee ,  Chin-Yuan Tu

IPC: G06F3/041 ,  G06F1/06 ,  H03K5/00

CPC classification number: G06F3/04184 ,  G06F1/06 ,  H03K5/00006

Abstract: An oscillating signal adjusting circuit is provided. The oscillating signal adjusting circuit is adapted to generate an internal clock signal of a touch and display driver integrated circuit and includes a frequency shift circuit and a spread spectrum control circuit. The frequency shift circuit acquires a first setting data indicated by a mode control signal, and determines whether to shift a frequency of the input clock signal according to the first setting data to generate a first output clock signal. The spread spectrum control circuit to acquires a second setting data indicated by the mode control signal, and determines whether to perform a spreading spectrum operation on the first output clock signal according to the second setting data to generate the internal clock signal. The mode control signal has a first voltage level in a display period and has a second voltage level in a touch sensing period.