Image sensor having pixel array and method for automatically compensating black level of the same
First Claim
Patent Images
1. An image sensor having a pixel array, comprising:
- a first pixel group including N and M numbers of unit pixels, where N and M are integers; and
a second pixel group being arrayed in one and the other sides of the first pixel group in a column direction so as to evaluate an offset value of a black level with respect to the unit pixels.
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Abstract
The presentc invention provides a pixel array of an image sensor, an image sensor having the same and a method for automatically compensating a black level of an image sensor. The inventive image sensor is able to prevent degradation of properties of the image sensor with regardless of applied conditions. To achieve this effect, an image sensor having a pixel array, includes: a first pixel group including N and M numbers of unit pixels, where N and M are integers; and a second pixel group being arrayed in one and the other sides of the first pixel group in a column direction so as to evaluate an offset value of a black level with respect to the unit pixels.
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Citations
12 Claims
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1. An image sensor having a pixel array, comprising:
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a first pixel group including N and M numbers of unit pixels, where N and M are integers; and
a second pixel group being arrayed in one and the other sides of the first pixel group in a column direction so as to evaluate an offset value of a black level with respect to the unit pixels. - View Dependent Claims (2, 3, 4)
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5. An image sensor, comprising:
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a pixel array unit including a first pixel group having N and M numbers of unit pixels and a second pixel group being arrayed in one and the other sides of the first pixel group in a column direction for evaluating an offset value of a black level with respect to the unit pixels; and
an offset adjusting unit for eliminating offset changes due to the black level by changing an offset value of the first pixel group according to an offset value of the black level. - View Dependent Claims (6, 7, 8, 9)
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10. A method for automatically compensating a black level of an image sensor that includes a pixel array unit having a first pixel group for sensing an image and a second pixel group for compensating a black level, comprising the steps of:
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evaluating an offset value of a black level with respect to the second pixel group;
determining an offset value updated by the offset value of the black level and an initial offset value; and
compensating the black level by adding the updated offset value and image data with respect to the first pixel group. - View Dependent Claims (11, 12)
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Specification