Patent ID: 8792006
Filing Date: 2014-07-29
Classification: H04N

Abstract:
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.