公开(公告)号：US20190173457A1

公开(公告)日：2019-06-06

申请号：US15828618

申请日：2017-12-01

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chien-Chuan Huang ,  Chia-Hsin Tung ,  Chun-Hung Chen ,  Hao-Jan Yang ,  Chieh-Hsiang Chang

IPC: H03K5/00 ,  H03K5/135 ,  G09G3/20 ,  G09G5/18 ,  H03K5/131 ,  G09G5/00

CPC classification number: H03K5/00006 ,  G06F1/10 ,  G09G3/2096 ,  G09G5/005 ,  G09G5/18 ,  H03K5/131 ,  H03K5/135

Abstract: A display driving circuit, a calibration module, and an associated calibration method are provided. The display driving circuit includes an internal clock circuit and the calibration module. The internal clock circuit generates an internal clock signal. The calibration module includes a counting circuit and a trimming circuit. The counting circuit counts pulses of a reference clock signal to generate a detected reference-clock count and counts pulses of the internal clock signal to generate a detected internal-clock count. The trimming circuit generates a calibration signal to adjust frequency of the internal clock signal when a predefined condition is satisfied. The predefined condition is related to comparison between a first preset count and one of the detected reference-clock count and the detected internal-clock count.

公开(公告)号：US10473531B2

公开(公告)日：2019-11-12

申请号：US15695021

申请日：2017-09-05

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ying-Chieh Yen ,  Min-Hung Hu ,  Yuan-Te Chen ,  Cun-Kai Zhao ,  Chien-Chuan Huang

IPC: G01K11/00 ,  G01K7/16 ,  G02F1/1333 ,  H02H5/04

Abstract: A temperature sensor includes a plurality of temperature coefficient voltage generators, one or more converters and at least one variable voltage or current source. The temperature coefficient voltage generators are used for generating multiple temperature coefficient voltages. The converters, coupled to the temperature coefficient voltage generators, are used for converting the temperature coefficient voltages to digital values. The at least one variable voltage or current source, each coupled to at least one of the temperature coefficient voltage generators, includes a first variable voltage or current source for outputting a first voltage or current in a first time period, and outputting a second voltage or current in a second time period, wherein the second voltage or current is different from the first voltage or current such that there exists a shift between a first voltage-temperature curve in the first time period and a second voltage-temperature curve in the second time period.

公开(公告)号：US10355679B2

公开(公告)日：2019-07-16

申请号：US15828618

申请日：2017-12-01

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chien-Chuan Huang ,  Chia-Hsin Tung ,  Chun-Hung Chen ,  Hao-Jan Yang ,  Chieh-Hsiang Chang

IPC: H03K5/00 ,  H03K5/131 ,  H03K5/135 ,  G09G3/20 ,  G09G5/00 ,  G09G5/18 ,  G09F1/10 ,  G06F1/10

Abstract: A display driving circuit, a calibration module, and an associated calibration method are provided. The display driving circuit includes an internal clock circuit and the calibration module. The internal clock circuit generates an internal clock signal. The calibration module includes a counting circuit and a trimming circuit. The counting circuit counts pulses of a reference clock signal to generate a detected reference-clock count and counts pulses of the internal clock signal to generate a detected internal-clock count. The trimming circuit generates a calibration signal to adjust frequency of the internal clock signal when a predefined condition is satisfied. The predefined condition is related to comparison between a first preset count and one of the detected reference-clock count and the detected internal-clock count.

公开(公告)号：US20190072435A1

公开(公告)日：2019-03-07

申请号：US15695021

申请日：2017-09-05

Applicant: NOVATEK Microelectronics Corp.

Inventor： Ying-Chieh Yen ,  Min-Hung Hu ,  Yuan-Te Chen ,  Cun-Kai Zhao ,  Chien-Chuan Huang

IPC: G01K7/16

CPC classification number: G01K7/16 ,  G01K7/01 ,  G01K7/21 ,  G01K2219/00 ,  G02F1/133382 ,  H02H1/0007 ,  H02H5/042

Abstract: A temperature sensor includes a plurality of temperature coefficient voltage generators, one or more converters and at least one variable voltage or current source. The temperature coefficient voltage generators are used for generating multiple temperature coefficient voltages. The converters, coupled to the temperature coefficient voltage generators, are used for converting the temperature coefficient voltages to digital values. The at least one variable voltage or current source, each coupled to at least one of the temperature coefficient voltage generators, includes a first variable voltage or current source for outputting a first voltage or current in a first time period, and outputting a second voltage or current in a second time period, wherein the second voltage or current is different from the first voltage or current such that there exists a shift between a first voltage-temperature curve in the first time period and a second voltage-temperature curve in the second time period.