Temperature characteristic correction device, temperature characteristic correction formula determination method, electronic apparatus, and control circuit

Patent metadata

Field	Value
Publication number	US-2015131695-A1
Application number	US-201414539189-A
Country	US
Kind code	A1
Filing date	Nov 12, 2014
Priority date	Nov 13, 2013
Publication date	May 14, 2015
Grant date	—

Abstract

A temperature characteristic correction device corrects a temperature characteristic of an electronic device. The temperature characteristic correction device calculates a peak correction characteristic approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula, and a correction characteristic approximating a waveform continuing in the first range of the temperature characteristic using a second formula. The temperature characteristic correction device calculates a total correction amount from the peak correction characteristic and the correction characteristic, and then corrects the temperature characteristic using the total correction amount.

First claim

What is claimed is:

1 . A temperature characteristic correction device adapted to correct a temperature characteristic of an electronic device,
the temperature characteristic correction device
calculating a peak correction characteristic approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula, and a correction characteristic approximating a waveform continuing in the first range of the temperature characteristic using a second formula;
calculating a total correction amount from the peak correction characteristic and the correction characteristic; and
correcting the temperature characteristic using the total correction amount.

2 . The temperature characteristic correction device according to claim 1 ,
wherein the temperature characteristic correction device receives a parameter signal for identifying temperature, calculates the total correction amount in accordance with the temperature, and corrects the temperature characteristic.

3 . The temperature characteristic correction device according to claim 1 , wherein
the first formula is an exponential function.

4 . The temperature characteristic correction device according to claim 1 , wherein
the second formula is a polynomial.

5 . The temperature characteristic correction device according to claim 1 , wherein
in a case in which a plurality of the peak waveforms exist in the first range, the peak correction characteristics are separately set using the first formula in a descending order of a ratio of a height of the peak to a width of the peak.

6 . The temperature characteristic correction device according to claim 1 ,
wherein the temperature characteristic correction device
performs a filtering process on the temperature characteristic of the electronic device to separate the waveform continuing in the first range and the peak waveform from each other, and
calculates the peak correction characteristic using the first formula based on the peak waveform separated.

7 . An electronic device comprising:
the temperature characteristic correction device according to claim 1 incorporated in the electronic device.

8 . An electronic apparatus comprising:
the electronic device according to claim 7 .

9 . A moving object comprising:
the electronic device according to claim 7 .

10 . A temperature characteristic correction formula determination method comprising:
changing temperature to identify a temperature characteristic of an electronic device; obtaining a peak correction characteristic by approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula; obtaining a correction characteristic by approximating a waveform continuing in the first range of the temperature characteristic using a second formula; and obtaining a computational formula for calculating a total correction amount from the peak correction characteristic and the correction characteristic.

11 . A control circuit adapted to correct a temperature characteristic of an electronic device,
the control circuit
calculating a peak correction characteristic approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula, and a correction characteristic approximating a waveform continuing in the first range of the temperature characteristic using a second formula;
calculating a total correction amount from the peak correction characteristic and the correction characteristic; and
correcting the temperature characteristic using the total correction amount.

Assignees

• Seiko Epson Corp

Inventors

• Kobayashi Yoshihiro

Classifications

• G01C19/5776 Primary

  Signal processing not specific to any of the devices covered by groups G01C19/5607 - G01C19/5719 · CPC title

• G01K15/005 Primary

  Calibration · CPC title