Method and system for detecting error of auto focus calibration

摘要

Provided is a method and a system for detecting an error focus calibration, wherein a first DFOV value is measured in a state before the collimator lens is interposed between the resolution chart and the camera module, and a second DFOV value is measured in a state after the collimator lens is interposed between the resolution chart and the camera module, a determination is made whether a value obtained by subtracting the second DFOV value from the first DFOV value is smaller than a threshold value, and detecting as an error of auto calibration, in a case the subtracted value is greater than the threshold value.

主权项

1. A system for detecting an error of auto focus calibration comprising: a collimator lens driving unit interposing a collimator lens between a resolution chart and a camera module for measuring a DFOV (Display Field of View) value of infinity; a DFOV measuring and storing unit measuring and storing a first DFOV value in a state before the collimator lens is interposed between the resolution chart and the camera module, and measuring and storing a second DFOV value in a state after the collimator lens is interposed between the resolution chart and the camera module; and an auto focus calibration error detecting unit determining whether a value obtained by subtracting the second DFOV value from the first DFOV value stored in the DFOV measuring and storing unit is smaller than a threshold value, and detecting an error of an auto calibration, in a case the subtracted value is greater than the threshold value.