Image-sensing device having a plurality of output channels
View Patent ↗An image-sensing device has pixel areas for outputting CCD signals of plural channels, and an adjusting portion for adjusting a level of each channel of the CCD signals outputted from the pixel area. A first channel CCD signal is provided from a pixel area 11 a , a horizontal OB area 15 a , a slide shift area 12 a , and an HCCD 13 a . A second channel CCD signal is provided from a pixel area 11 b , a horizontal OB area 15 b , a slide shift area 12 b , and an HCCD 13 b . Both of the first and second CCD signals are supplied to the adjusting portion with a reference signal added. The adjusting portion controls CCD signal of each channel by making the level of reference signal the same. The variation of the shift efficiency of electric charge in the border of pixel areas 11 a and 11 b for each channel, and in the slide shift areas 13 a and 13 b can be compensated.
1. An image-sensing device having a plurality of output channels comprising:
a pixel area having a plurality of photoelectric converters to convert an optical image into an electric charge and a plurality of first vertical CCDs to transfer the electric charge vertically;
a horizontal optical black area having a plurality of photoelectric converters to produce an electric charge in an optical black level and a plurality of second vertical CCDs to vertically transfer the electric charge disposed on the left and right borders of the pixel area;
a horizontal shift area having left and right horizontal CCDs to horizontally shift the electric charge transferred from the plurality of first vertical CCDs provided on both sides of a border dividing the whole pixel area into two pixel areas and the plurality of second vertical CCDs provided in the horizontal optical black area toward the border;
a vertical adder for adding a reference signal to the plurality of first and second vertical CCDs provided at a top side of the image-sensing device confronting the horizontal shift area across the pixel area and the horizontal optical black area; and
an adjusting portion for adjusting a level of electric charge outputted from the left and right horizontal CCDs,
wherein the pixel area and the horizontal optical black area are divided into a left channel for transferring an electric charge to the left horizontal CCD and a right channel for transferring an electric charge to the right horizontal CCD, respectively, and
wherein the adjusting portion adjusts a level of electric charge from the left and right channels by using the reference signal outputted from the plurality of second vertical CCDs in the horizontal optical black area when a smear is detected from outputs of the left and right channels.
2. The image-sensing device as claimed in claim 1 , further comprising left and right slide shift areas for shifting the electric charge to an oblique direction, wherein the left slide shift area is composed of a plurality of left slide shift CCDs to shift the electric charge from the left channel to the left horizontal CCD, and wherein the right slide shift area is composed of a plurality of right slide shift CCDs to shift the electric charge from the right channel to the right horizontal CCD.
3. The image-sensing device as claimed in claim 1 , wherein each output stage of the left and right horizontal CCDs is opposed to each other.
4. An image-sensing device having a plurality of output channels comprising:
a pixel area having a plurality of photoelectric converters to convert an optical image into an electric charge and a plurality of first vertical CCDs to transfer the electric charge vertically;
a horizontal optical black area having a plurality of photoelectric converters to produce an electric charge in an optical black level and a plurality of second vertical CCDs to vertically transfer the electric charge disposed on the left and right borders of the pixel area;
a horizontal shift area having left and right horizontal CCDs to horizontally shift the electric charge transferred from the plurality of first vertical CCDs provided on both sides of a border dividing the whole pixel area into two pixel areas and the plurality of second vertical CCDs provided in the horizontal optical black area toward the border;
a vertical adder for adding a reference signal to the plurality of first and second vertical CCDs provided at a top side of the image-sensing device confronting the horizontal shift area across the pixel area and the horizontal optical black area; and
an adjusting portion for adjusting a level of electric charge outputted from the left and right horizontal CCDs,
wherein the pixel area and the horizontal optical black area are divided into a left channel for transferring an electric charge to the left horizontal CCD and a right channel for transferring an electric charge to the right horizontal CCD, respectively, and
wherein the adjusting portion adjusts a level of electric charge from each of the left and right channels by using at least the reference signal outputted from a center portion of the vertical adder when a smear is not detected from outputs of the left and right channels.
5. The image-sensing device as claimed in claim 4 , further comprising left and right slide shift areas for shifting the electric charge to an oblique direction, wherein the left slide shift area is composed of a plurality of left slide shift CCDs to shift the electric charge from the left channel to the left horizontal CCD, and wherein the right slide shift area is composed of a plurality of right slide shift CCDs to shift the electric charge from the right channel to the right horizontal CCD.
6. The image-sensing device as claimed in claim 4 , wherein each output stage of the left and right horizontal CCDs is opposed to each other.
7. A method of adjusting picture quality of an image-sensing device having a plurality of output channels comprising:
a pixel area having a plurality of photoelectric converters to convert an optical image into an electric charge and a plurality of first vertical CCDs to transfer the electric charge vertically;
a horizontal optical black area having a plurality of photoelectric converters to produce an electric charge in an optical black level and a plurality of second vertical CCDs to vertically transfer the electric charge disposed on the left and right borders of the pixel area;
a horizontal shift area having left and right horizontal CCDs to horizontally shift the electric charge transferred from the plurality of first vertical CCDs provided on both sides of a border dividing the whole pixel area into two pixel areas and the plurality of second vertical CCDs provided in the horizontal optical black area toward the border;
a vertical adder for adding a reference signal to the plurality of first and second vertical CCDs provided at a top side of the image-sensing device confronting the horizontal shift area across the pixel area and the horizontal optical black area; and
an adjusting portion for adjusting a level of electric charge outputted from the left and right horizontal CCDs,
wherein the pixel area and the horizontal optical black area are divided into a left channel for transferring an electric charge to the left horizontal CCD and a right channel for transferring an electric charge to the right horizontal CCD, respectively,
the method comprising the steps of:
detecting whether or not a smear is generated in an electric charge outputted from the pixel area; and
adjusting a level of the electric charge by using the reference signal outputted from the plurality of second vertical CCDs in the horizontal optical black area when a smear is detected.
8. A method of adjusting picture quality of an image-sensing device having a plurality of output channels comprising:
a pixel area having a plurality of photoelectric converters to convert an optical image into an electric charge and a plurality of first vertical CCDs to transfer the electric charge vertically;
a horizontal optical black area having a plurality of photoelectric converters to produce an electric charge in an optical black level and a plurality of second vertical CCDs to vertically transfer the electric charge disposed on the left and right borders of the pixel area;
a horizontal shift area having left and right horizontal CCDs to horizontally shift the electric charge transferred from the plurality of first vertical CCDs provided on both sides of a border dividing the whole pixel area into two pixel areas and the plurality of second vertical CCDs provided in the horizontal optical black area toward the border;
a vertical adder for adding a reference signal to the plurality of first and second vertical CCDs provided at a top side of the image-sensing device confronting the horizontal shift area across the pixel area and the horizontal optical black area; and
an adjusting portion for adjusting a level of electric charge outputted from the left and right horizontal CCDs,
wherein the pixel area and the horizontal optical black area are divided into a left channel for transferring an electric charge to the left horizontal CCD and a right channel for transferring an electric charge to the right horizontal CCD, respectively,
the method comprising the steps of:
detecting whether or not a smear is generated in an electric charge outputted from the pixel area; and
adjusting a level of the electric charge from the left and right channels by using the reference signal outputted from a center portion of the vertical ladder when a smear is not detected from outputs of the left and right channels.