초록 ▼

The present invention relates to an image pick-up apparatus having a focus detection mechanism capable of improving an AF speed at low costs and in a space-saving way without adding any new mechanism or optical system and ensuring an accurate focus adjustment and capable of preventing a picture-taki

The present invention relates to an image pick-up apparatus having a focus detection mechanism capable of improving an AF speed at low costs and in a space-saving way without adding any new mechanism or optical system and ensuring an accurate focus adjustment and capable of preventing a picture-taking image quality being deteriorated. An image pick-up device of the image pick-up apparatus of the present invention has a focus detection area and image pick-up area and, since no image data is obtained at the focus detection area, interpolation processing is done with image data of a peripheral image pick-up area. In the case where a color filter is provided in the image pick-up area, interpolation processing is done with image data of an image pick-up area and image data of a peripheral area.

대표청구항 ▼

1. An image pick-up apparatus on which a chip-like image pick-up device for receiving subject light passing through a picture-taking lens and taking an image electronically is mounted, comprising:a first light receiving element group which is formed on the chip-like image pick-up device and comprise

1. An image pick-up apparatus on which a chip-like image pick-up device for receiving subject light passing through a picture-taking lens and taking an image electronically is mounted, comprising:a first light receiving element group which is formed on the chip-like image pick-up device and comprises a plurality of first light receiving elements arranged to allow the subject light which passes through the picture-taking lens to be received;a first microlens group which is placed on the chip-like image pick-up device and comprises a plurality of microlenses arranged to respectively oppose the first light receiving elements of the first light receiving element group, for allowing the subject light which has passed through the picture-taking lens to converge on the first light receiving elements;a second light receiving element group which is formed on the chip-like image pick-up device and comprises a plurality of second light receiving elements each comprising a pair of light receiving portions which receive the subject light which passes through the picture-taking lens;a second microlens group which is placed on the chip-like image pick-up device and comprises a plurality of microlenses arranged to respectively oppose the second light receiving elements of the second light receiving element group for allowing the subject light which has passed through the picture-taking lens to be pupil-divided into light beams;focus detection means for effecting focus detection based on outputs of the second light receiving element group;correction means for correcting output signals corresponding to a subject image and to a focus detection area present at the second light receiving element group on the basis of outputs of the first light receiving element group; andimage pick-up means for picking up the subject image based on signals obtained by correcting signals output from the first light receiving element group and signals output from the second light receiving element group by the correction means. 2. An image pick-up apparatus according to claim 1, wherein the correction means effects the correction based on predetermined outputs of the first light receiving element group present at a peripheral area of the second light receiving element group. 3. An image pick-up apparatus according to claim 1, wherein, in the focus detection area, the first light receiving elements and second light receiving elements are alternately arranged. 4. An image pick-up apparatus according to claim 1, wherein the microlens is arranged at one corresponding second light receiving element and at one corresponding first light receiving element to make a light sensitivity optimal. 5. An image pick-up apparatus according to claim 1, wherein a storage operation is performed also by the second light receiving element group arranged at the focus detection area and the image pick-up means picks up an image based on signals output from the first light receiving element group and signals output from the second light receiving element group. 6. An image pick-up apparatus according to claim 1, wherein the focus detection area comprises first and second areas and the second light receiving element group arranged at the first area effects focus detection of the subject having a horizontal contrast and the second light receiving element group arranged at the second area effects focus detection of the subject having a vertical contrast, and the focus detection means makes focus detection based on the outputs of the second light receiving element group at the first and second areas. 7. An image pick-up apparatus having an image pick-up device for receiving subject light passing through a picture-taking lens and taking an image electronically, comprising:a first light receiving group having a plurality of first light receiving elements arranged to allow the subject light which passes through the picture-taking lens to be received;microlens groups for allowing the subject light which passes through the picture-taking lens to be pupil-divided into light beams;a second light receiving element group having a plurality of second light receiving elements each comprised of a pair of light receiving portions which receive the light beams of the subject light;focus detection means for effecting focus detection based on outputs of the second light receiving element group;correction means for correcting a subject image corresponding to a focus detection area present at the second light receiving element group on the basis of the outputs of the first light receiving element group; andimage pick-up means for picking up an image based on signals output from the first light receiving element group and signals output from the correction means, wherein, in front of at least the first light receiving element group, a color filter is arranged as a color array based on a predetermined rule, and the correction means corrects color information based on the predetermined rule at an area present in the second light receiving group and does so based on the outputs of those elements of the first light receiving element group having the same color as that of the color information in the color filter. 8. An image pick-up apparatus according to claim 7, wherein the predetermined rule corresponds to a bayer array or a complementary color type color filter array. 9. An image pick-up apparatus having an image pick-up device for receiving subject light passing through a picture-taking lens and taking an image electronically, comprising:a first light receiving group having a plurality of first light receiving elements arranged to allow the subject light which passes through the picture-taking lens to be received;microlens groups for allowing the subject light which passes through the picture-taking lens to be pupil-divided into light beams;a second light receiving element group having a plurality of second light receiving elements each comprised of a pair of light receiving portions which receive the light beams of the subject light;focus detection means for effecting focus detection based on outputs of the second light receiving element group;correction means for correcting a subject image corresponding to a focus detection area present at the second light receiving element group on the basis of the outputs of the first light receiving element group; andimage pick-up means for picking up an image based on signals output from the first light receiving element group and signals output from the correction means, wherein a color filter having a color array based on a predetermined rule is arranged in front of the first and second light receiving groups and the correction means corrects a pair of outputs of the second light receiving element group on the basis of an additively calculated signal. 10. An image pick-up apparatus according to claim 9, wherein the predetermined rule is based on a bayer array or a complementary color type color filter array. 11. An image pick-up apparatus on which a chip-like image pick-up device for electronically picking up a subject light passing through a picture-taking lens, comprising:a first light receiving element group which is formed on the chip-like image pick-up device and comprises a plurality of first light receiving elements arranged to allow the subject light to be received;a first microlens group which is placed on the chip-like image pick-up device and comprises a plurality of microlenses arranged to respectively oppose the first light receiving elements of the first light receiving element group for allowing the subject light which has passed through the picture-taking lens to converge on the first light receiving elements;a second light receiving element group which is formed on the chip-like image pick-up device and comprises a plurality of second light receiving elements each comprising a pair of light receiving portions which receive the subject light which passes through the picture-t aking lens;a second microlens group which is placed on the chip-like image pick-up device and comprises a plurality of microlenses arranged to respectively oppose the second light receiving elements of the second light receiving element group for allowing the subject light which has passed through the picture-taking lens to be pupil-divided into light beams;a focus detection section for effecting focus detection of the image pick-up apparatus based on outputs of the second light receiving element group;a correction section for correcting output signals corresponding to a subject image and to a focus detection area present at the second light receiving element group on the basis of outputs of the first light receiving element group; andan image pick-up section for picking up the subject image based on signals output from the first light receiving element group and signals output from the correction section. 12. An image pick-up apparatus according to claim 11, wherein the correction section makes correction based on outputs of predetermined ones of the first light receiving elements situated at a peripheral area of the second light receiving element. 13. An image pick-up apparatus according to claim 11, wherein, in the focus detection area, the first light receiving elements and second light receiving elements are sequentially alternately arranged at a predetermined number interval unit. 14. An image pick-up apparatus according to claim 11, wherein, the microlens is arranged at one corresponding second light receiving element and at one corresponding first light receiving element to make a light sensitivity optimal. 15. An image pick-up apparatus according to claim 11, wherein a storage operation is effected by the second light receiving group arranged at the focus detection area and the image pick-up section picks up an image based on signals output from the first light receiving element group and signals output from the second light receiving element group. 16. An image pick-up apparatus according to claim 11, wherein the focus detection area comprises first and second areas and the second light receiving element group arranged at the first area effects focus detection of the subject having a horizontal contrast and the second light receiving element group arranged at the second area effects focus detection of the subject having a vertical contrast, and the focus detection section effects focus detection based on the outputs of the second light receiving elements at the first and second areas. 17. An image pick-up apparatus having an image pick-up device for electronically picking up a subject image passing through a picture-taking lens, comprising:a first light receiving element group having a plurality of first receiving elements arranged to allow the subject image to be received;a microlens group for allowing the subject light which passes through the picture-taking lens to be pupil-divided into light beams;a second light receiving group having a plurality of second light receiving elements each comprised of a pair of light receiving portions which receive the light beams of the subject light;a focus detection section for effecting focus detection of the image pick-up apparatus based on outputs of the second light receiving elements;a correction section for correcting an image of the focus detection area present in the second light receiving element group on the basis of outputs of the first light receiving element group; andan image pick-up section for picking up an image based on signals output from the first light receiving element group and signal output from the correction section, wherein, in front of at least the first light receiving element group, a color filter is arranged as a color array based on a predetermined rule and the correction section corrects color information based on a predetermined rule at an area present in the second light receiving element group and does so based on the outputs of those elements of the first light receiving element group having the same color as that of the color information in the color filter. 18. An image pick-up apparatus according to claim 17, wherein the predetermined rule corresponds to a bayer array or a complementary color type color filter array. 19. An image pick-up apparatus having an image pick-up device for electronically picking up a subject image passing through a picture-taking lens, comprising:a first light receiving element group having a plurality of first receiving elements arranged to allow the subject image to be received;a microlens group for allowing the subject light which passes through the picture-taking lens to be pupil-divided into light beams;a second light receiving group having a plurality of second light receiving elements each comprised of a pair of light receiving portions which receive the light beams of the subject light;a focus detection section for effecting focus detection of the image pick-up apparatus based on outputs of the second light receiving elements;a correction section for correcting an image of the focus detection area present in the second light receiving element group on the basis of outputs of the first light receiving element group; andan image pick-up section for picking up an image based on signals output from the first light receiving element group and signal output from the correction section, wherein a color filter having a color array based on a predetermined rule is arranged in front of the first and second light receiving element groups and the correction section corrects a pair of outputs of the second light receiving element group on the basis of additively calculated signal. 20. An image pick-up apparatus according to claim 19, wherein the predetermined rule is based on a bayer array or a complementary color type color filter array.