Method for calibrating ambient light sensor and system thereof

Abstract

A method for calibrating an ambient light sensor and a system thereof are provided. One standard light source is utilized to irradiate a plurality of electronic device samples one by one, the ambient light sensor can sense the standard light source and output a light sensation value to an arithmetic unit, statistic analysis is carried out on the light sensation values to obtain an average value, an electronic device to be calibrated is irradiated by the standard light source, the ambient light sensor can sense the standard light source and output a light sensation value to a calibrating device, a calibrating value can be obtained according to the average value and the light sensation value, the calibrating value is loaded into the electronic device to be calibrated through a calibrating module, and the electronic device to be calibrated can become the calibrated electronic device. The calibrating module is operated by the calibrated electronic device. Furthermore, the ambient light sensor can sense light to obtain a light sensation value, the light sensation value is operated with the calibrating value, and accordingly one calibrated light sensation value is output.

Description

Technical field [0001] The invention relates to a method and a system for calibrating an ambient light sensor, in particular to a method and a system for calibrating an ambient light sensor arranged in an electronic device. Background technique [0002] As ambient light sensors are used in smart phones, such as Apple’s iPhone or iPad, their applications are becoming more and more widespread. The iPhone or iPad uses an ambient light sensor to detect ambient light to adjust the display brightness of its display accordingly, thereby reducing power consumption and extending battery life. [0003] However, in the process of assembling the ambient light sensor in the above-mentioned electronic device, the amount of light received by the ambient light sensor will be affected by the thickness error of the cover lens, coating on the glass and the ambient light sensor. The light transmittance error of the translucent ink area in the relative position of the sensor, the hole size error of th...

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Problems solved by technology

[0003] However, in the process of assembling the ambient light sensor into the above-mentioned electronic device, the amount of light received by the ambient light sensor will be affected by the thickness error of the glass (cover lens) covering it, the coating on the glass and the ambient light sensor. The light transmittance error of the semi-transparent ink area relative to the detector, the opening size error of the semi-transparent ink area, the alignment error between the sensing area of ​​the ambient light sensor and the semi-transparent ink area, ambient light sensing Due to the influence of factors such as the gap between the device and the glass and the error of the ambient light sensor itself, the ambient light sensors in these electronic devices of the same type have different sensing results for the same ambient light, which cannot be used in the electronic devices. These electronic devices of the same type in the same environment can produce consistent responses based on the light sensing values ​​of their ambient light sensors, such as displaying consistent brightness

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