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US 2008/0075449 A1Published application
Auto Exposure Controlling Device and Method
AssigneeLG Innotek Co., Ltd.
InventorSANG LEE
Life of this patent
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Abstract
An automatic exposure (AE) controlling device and method are provided. According to the method, an electric shutter (ES) value and an analog gain control (AGC) value can be calculated through a proportional integral control method according to a brightness value of an inputted image frame. Then AE compensation on a present image frame can be performed using the calculated ES value and ACG value.
Claims19
An automatic exposure (AE) controlling method, comprising:
- calculating an electric shutter (ES) value through a proportional integral control method;
- calculating an analog gain control (AGC) value through the proportional integral control method;
- and
- performing AE compensation on a present image frame using the calculated ES value and the calculated AGC value.
1 more element
An automatic exposure (AE) control device, comprising:
- an image sensor to convert light intensity of an incident image into an analog image signal;
- an analog front end (AFE) capable of receiving the analog image signal to convert the analog image signal into a digital image signal, and controlling operations of the image sensor;
- and
- a controller capable of calculating an electric shutter (ES) value and an analog gain control (AGC) value using a proportional integral control method according to a brightness value of the digital image signal from the AFE, and capable of controlling an exposure time of the image sensor and an analog gain of the AFE using the calculated ES value and the calculated AGC value.
1 more element
Dependencies are inferred from the claim text.