Title:
WEARABLE DEVICE, OPTICAL MODULE AND DRIVING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/083033
Kind Code:
A1
Abstract:
An optical module, comprising a light emitting assembly (110) and a driver (120). The light emitting assembly (110) is used for emitting an optical signal based on a drive current. The driver (120) comprises a calibration unit (122) and a drive current setting unit (124). The calibration unit (122) is used for obtaining an original monitoring current feedback value MONDACbefore corresponding to a current monitoring current of the light emitting assembly (110) and a tracking error value TE of the current temperature with respect to reference temperature, and calibrating the original monitoring current feedback value MONDACbefore based on the tracking error value TE to obtain a calibrated monitoring current feedback value MONDACafter. The drive current setting unit (124) is used for setting the drive current based on the calibrated monitoring current feedback value MONDACafter to control the optical power of the output of the optical signal emitted by the light emitting assembly (110). The monitoring current is calibrated and the tracking error is compensated in a simple way, so as to perform better temperature compensation on the optical module.
Inventors:
LIN LIN (CN)
SUN JIAN (CN)
GUO ZIQIANG (CN)
SUN JIAN (CN)
GUO ZIQIANG (CN)
Application Number:
PCT/CN2019/110485
Publication Date:
April 30, 2020
Filing Date:
October 10, 2019
Export Citation:
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
BEIJING BOE OPTOELECTRONICS TECH CO LTD (CN)
BEIJING BOE OPTOELECTRONICS TECH CO LTD (CN)
International Classes:
G02B6/42
Domestic Patent References:
| WO2018179306A1 | 2018-10-04 |
Foreign References:
| CN202818303U | 2013-03-20 | |||
| CN104919347A | 2015-09-16 | |||
| CN106451061A | 2017-02-22 | |||
| CN207475556U | 2018-06-08 | |||
| US20040131094A1 | 2004-07-08 |
Attorney, Agent or Firm:
BEIJING INTELLEGAL INTELLECTUAL PROPERTY AGENT LTD. (CN)
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