Line sensor, image reading device, and image forming apparatus
First Claim
1. A line sensor comprising:
- a first light-receiving-element row, a second light-receiving-element row and a third light-receiving-element row each including a plurality of light receiving elements that are disposed in a first direction, the first light-receiving-element row, the second light-receiving-element row, and the third light-receiving-element row being disposed at a predetermined interval in a second direction orthogonal to the first direction;
a first plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the first light-receiving-element row,a second plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the second light-receiving-element row,a third plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the third light-receiving-element row.wherein each of the first plurality of transmitting portions, the second plurality of transmitting portions and the third plurality of transmitting portions, includes a first transmitting portion transmitting light having a first wavelength, a second transmitting portion transmitting light having a second wavelength different from the first wavelength, and a third transmitting portion transmitting light having a third wavelength different from both the first wavelength and the second wavelength,a first plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the first light-receiving-element row,a second plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the second light-receiving-element row,a third plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the third light-receiving-element row,wherein each of the first light-receiving-element row, the second light-receiving-element row and the third light-receiving-element row includes a light receiving element corresponding to the first transmitting portion, a light receiving element corresponding to the second transmitting portion disposed adjacent to the first transmitting portion in the first direction, and a light receiving element corresponding to the third transmitting portion disposed adjacent to the second transmitting portion in the first direction,wherein in the first light-receiving-element row, a distance, in the first direction between a center of the first light-receiving-element row and a center of a first light receiving element disposed on a first position in the first direction is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the first light receiving element,a distance, in the first direction, between the center of the first light-receiving-element row and a center of a second light receiving element adjacent to the first light receiving element is longer than a distance in the first direction, between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the second light receiving element,a distance, in the first direction, between the center of the first light-receiving-element row and the first position is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a second position where the second light receiving element is disposed,a distance, in the first direction, between the center of the first light receiving element and the center of the transmitting portion corresponding to the first light receiving element is longer than a distance, in the first direction, between the center of the second light receiving element and the center of the transmitting portion corresponding to the second light receiving element,wherein a condensing portion corresponding to the first light receiving element is disposed opposite to the first light receiving element with respect to a transmitting portion corresponding to the first light receiving element in a third direction orthogonal to both the first direction and the second direction, andwherein the distance, in the first direction, between the center of the first light-receiving-element row and the center of the first light receiving element is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of the condensing portion corresponding to the first light receiving element,the distance, in the first direction, between the center of the first light-receiving-element row and the center of the second light receiving element is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of a condensing portion corresponding to the second light receiving element,a distance, in the first direction, between the center of the first light receiving element and the center of the condensing portion corresponding to the first light receiving element is longer than a distance, in the first direction, between the center of the second light receiving element and the center of the condensing portion corresponding to the second light receiving element, andwherein a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the first light receiving element positioned opposite to a center side of the first light receiving element row in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the first light-receiving element positioned opposite to the center side in the first direction,a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the second light receiving element positioned opposite to the center side in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the second light receiving element positioned opposite to the center side in the first direction,wherein the first light-receiving-row includes a vertical wire extending in the second direction, disposed between the center of the first light receiving element and the center of the second light receiving element in the first direction, and includes a horizontal wire [wires] extending in the first direction, the vertical wire and the horizontal wire being disposed between the transmitting portion corresponding to the first light receiving element and the first light receiving element in the third direction, andwherein a transmitting portion corresponding to a light receiving element disposed on a third position in the first direction with respect to the first light-receiving-element row, a transmitting portion corresponding to a light receiving element disposed on the third position with respect to the second light-receiving-element row, and a transmitting portion corresponding to a light receiving element disposed on the third position with respect to the third light-receiving-element row, are transmitting portions each of which transmits different light with each other.
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Accused Products
Abstract
In a line sensor including color filters periodically disposed in a light-receiving-element row, a “mixture of colors” problem occurs when light that has been transmitted through a color filter differing from a color filter corresponding to a light receiving element is incident upon the light receiving element. To prevent the “mixture of colors” from occurring, in a CMOS sensor 107 including a light-receiving-element row in which a plurality of photodiodes 1204 are disposed side by side in a main scanning direction and a plurality of color filters 1202 that are disposed in correspondence with the plurality of photodiodes 1204, the center of each color filter 1202, other than the center color filter that corresponds to the center photodiode of the light-receiving-element row, is displaced in a direction toward the center of the light-receiving-element row from the center of the photodiode 1204 corresponding to the color filter.
26 Citations
24 Claims
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1. A line sensor comprising:
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a first light-receiving-element row, a second light-receiving-element row and a third light-receiving-element row each including a plurality of light receiving elements that are disposed in a first direction, the first light-receiving-element row, the second light-receiving-element row, and the third light-receiving-element row being disposed at a predetermined interval in a second direction orthogonal to the first direction; a first plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the first light-receiving-element row, a second plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the second light-receiving-element row, a third plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the third light-receiving-element row. wherein each of the first plurality of transmitting portions, the second plurality of transmitting portions and the third plurality of transmitting portions, includes a first transmitting portion transmitting light having a first wavelength, a second transmitting portion transmitting light having a second wavelength different from the first wavelength, and a third transmitting portion transmitting light having a third wavelength different from both the first wavelength and the second wavelength, a first plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the first light-receiving-element row, a second plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the second light-receiving-element row, a third plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the third light-receiving-element row, wherein each of the first light-receiving-element row, the second light-receiving-element row and the third light-receiving-element row includes a light receiving element corresponding to the first transmitting portion, a light receiving element corresponding to the second transmitting portion disposed adjacent to the first transmitting portion in the first direction, and a light receiving element corresponding to the third transmitting portion disposed adjacent to the second transmitting portion in the first direction, wherein in the first light-receiving-element row, a distance, in the first direction between a center of the first light-receiving-element row and a center of a first light receiving element disposed on a first position in the first direction is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the first light receiving element, a distance, in the first direction, between the center of the first light-receiving-element row and a center of a second light receiving element adjacent to the first light receiving element is longer than a distance in the first direction, between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the second light receiving element, a distance, in the first direction, between the center of the first light-receiving-element row and the first position is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a second position where the second light receiving element is disposed, a distance, in the first direction, between the center of the first light receiving element and the center of the transmitting portion corresponding to the first light receiving element is longer than a distance, in the first direction, between the center of the second light receiving element and the center of the transmitting portion corresponding to the second light receiving element, wherein a condensing portion corresponding to the first light receiving element is disposed opposite to the first light receiving element with respect to a transmitting portion corresponding to the first light receiving element in a third direction orthogonal to both the first direction and the second direction, and wherein the distance, in the first direction, between the center of the first light-receiving-element row and the center of the first light receiving element is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of the condensing portion corresponding to the first light receiving element, the distance, in the first direction, between the center of the first light-receiving-element row and the center of the second light receiving element is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of a condensing portion corresponding to the second light receiving element, a distance, in the first direction, between the center of the first light receiving element and the center of the condensing portion corresponding to the first light receiving element is longer than a distance, in the first direction, between the center of the second light receiving element and the center of the condensing portion corresponding to the second light receiving element, and wherein a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the first light receiving element positioned opposite to a center side of the first light receiving element row in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the first light-receiving element positioned opposite to the center side in the first direction, a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the second light receiving element positioned opposite to the center side in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the second light receiving element positioned opposite to the center side in the first direction, wherein the first light-receiving-row includes a vertical wire extending in the second direction, disposed between the center of the first light receiving element and the center of the second light receiving element in the first direction, and includes a horizontal wire [wires] extending in the first direction, the vertical wire and the horizontal wire being disposed between the transmitting portion corresponding to the first light receiving element and the first light receiving element in the third direction, and wherein a transmitting portion corresponding to a light receiving element disposed on a third position in the first direction with respect to the first light-receiving-element row, a transmitting portion corresponding to a light receiving element disposed on the third position with respect to the second light-receiving-element row, and a transmitting portion corresponding to a light receiving element disposed on the third position with respect to the third light-receiving-element row, are transmitting portions each of which transmits different light with each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An image reading apparatus configured to read an image on a document, the apparatus, comprising:
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a light emitting unit configured to illuminate the document with light; and a line sensor configured to receive light reflected from the document, wherein the line sensor comprises; a first light-receiving-element row, a second light-receiving-element row and a third light-receiving-element row each including a plurality of light receiving elements that are disposed in a first direction, the first light-receiving-element row, the second light-receiving-element row, and the third light-receiving-element row being disposed at a predetermined interval in a second direction orthogonal to the first direction; a first plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the first light-receiving-element row, a second plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the second light-receiving-element row, a third plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the third light-receiving-element row, wherein the first transmitting portions includes a first transmitting portion transmitting light having a first wavelength, the second transmitting portions includes a second transmitting portion transmitting light having a second wavelength different form the first wavelength, and the third transmitting portions includes a third transmitting portion transmitting light having a third wavelength different from both the first wavelength and the second wavelength, a first plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the first light-receiving-element row, a second plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the second light-receiving-element row, a third plurality of condensing portions each corresponding to a different one of the plurality of light receiving elements disposed in the third light-receiving-element row, wherein each of the first light-receiving-element row, the second light-receiving-element row and the third light-receiving-element row includes a light receiving element corresponding to the first transmitting portion, a light receiving element corresponding to the second transmitting portion disposed adjacent to the first transmitting portion, and a light receiving element corresponding to the third transmitting portion disposed adjacent to the second transmitting portion, wherein in the first light-receiving-element row, a distance, in the first direction, between a center of the first light receiving-element-row and a center of a first light-receiving element disposed on a first position in the first direction is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the first light receiving element, a distance, in the first direction , between the center of the first light-receiving-row and a center of a second light receiving element adjacent to the first light receiving element is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the second light receiving element, a distance, in the first direction, between the center of the first light-receiving-element row and the first position is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a second position where the second light receiving element is disposed, wherein a condensing portion corresponding to the first light receiving element is disposed opposite to the first light receiving element with respect to a transmitting portion corresponding to the first light receiving element in a third direction orthogonal to both the first direction and the second direction, and wherein the distance, in the first direction, between the center of the first light-receiving-element row and the center of the first light receiving element is longer than a distance, in the first direction, between the center of the first light-receiving-element row and a center of the condensing portion corresponding to the first light receiving element, the distance, in the first direction, between the center of the first light-receiving-element row and the center of the second light receiving element is longer than a distance, in the first direction, between the center of the first light-receiving-element row and center of the condensing portion corresponding to the second light-receiving element, a distance, in the first direction, between the center of the first light receiving element and the center of the condensing portion corresponding to the first light receiving element is longer than a distance, in the first direction, between the center of the second light receiving element and the center of the condensing portion corresponding to the second light receiving element, and wherein, in the first direction, a distance between the center of the first light-receiving-element row and an end portion of the first light-receiving-element positioned opposite to a center side of the first light-receiving-element row in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the first light receiving element positioned opposite to the center side in the first direction, a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the second light receiving element positioned opposite to the center side in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the second light-receiving element positioned opposite to the center side in the first direction, wherein the first light-receiving-element row includes a vertical wire extending in the second direction and disposed between a the center of the first light receiving element and the center of the second light-receiving-element in the first direction, and includes a horizontal wire extending in the first direction, the vertical wire and the horizontal wire being disposed between the transmitting portion corresponding to the first light receiving element and the first light receiving element in the third direction, and wherein a transmitting portion corresponding to a light receiving element disposed on a third position in the first direction with respect to the first light-receiving-element row, a transmitting portion corresponding to a light receiving element disposed on the third position with respect to the second light-receiving-element row, and the transmitting portion corresponding to a light-receiving element disposed on the third position with respect to the third light-receiving-element row, are transmitting portions each of which transmits different light with each other. - View Dependent Claims (18, 19, 20, 21, 22)
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23. An image forming apparatus configured to form an image on a sheet, the apparatus comprising:
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a light emitting unit configured to illuminate a document with light; and a line sensor configured to receive light reflected from the document; a generation unit configured to generate image data based on the light receiving result of the line sensor; and an image forming unit configured to form an image on the sheet based on the image data generated by the generation unit, wherein the line sensor comprises; a first light-receiving-element row, a second light-receiving-element row and a third light-receiving-element row each including a plurality of light receiving elements that are disposed in a first direction, the first light-receiving-element row, the second light-receiving-element row, and the third light-receiving-element row being disposed at a predetermined interval in a second direction orthogonal to the first direction; a first plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in each of the first light-receiving-element row, a second plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the second light-receiving-element row [and], a third plurality of transmitting portions each corresponding to a different one of the plurality of light receiving elements disposed in the third light-receiving-element row, Wherein each of the first plurality of transmitting portions, the second plurality of transmitting portions and the third plurality of transmitting portions, includes a first transmitting portion transmitting light having a first wavelength, a second transmitting portion transmitting light having a second wavelength different from the first wavelength, and [the third transmitting portions transmit] a third transmitting portion transmitting light having a third wavelength different from both the first wavelength and the second wavelength, a first plurality of condensing portions each corresponding to a different one of the first plurality of light receiving elements disposed in the first light-receiving-element row, a second plurality of condensing portions each corresponding to a different one of the second plurality of light receiving elements disposed in the second light-receiving-element row, a third plurality of condensing portions each corresponding to a different one of the third plurality of light receiving elements disposed in the third light-receiving-element row, wherein each of the first light-receiving-element row, the second light-receiving-element row and the third light-receiving-element row includes a light receiving element corresponding to the first transmitting portion, a light receiving element corresponding to the second transmitting portion disposed adjacent to the first transmitting portion in the first direction, and a light receiving element corresponding to the third transmitting portion disposed adjacent to the second transmitting portion in the first direction, wherein in the first light-receiving-element row, a distance, in the first direction, between a center of the first light-receiving-element row and a center of a first light receiving element disposed on a first position in the first direction is longer than a distance in the first direction between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the first light receiving element, a distance in the first direction between the center of the first-light-receiving element row and a center of a second light receiving element adjacent to the first light receiving element is longer than a distance in the first direction between the center of the first light-receiving-element row and a center of a transmitting portion corresponding to the second light receiving element, a distance, in the first direction, between the center of the first light-receiving-element row and the first position is longer than a distance in the first direction between the center of the first light-receiving-element row and a second position where the second light receiving element is disposed, a distance, in the first direction, between the center of the first light receiving element and the center of the transmitting portion corresponding to the first light receiving element is longer than a distance, in the first direction, between the center of the second light receiving element and the center of the transmitting portion corresponding to the second light receiving element, wherein a condensing portion corresponding to the first light receiving element is disposed opposite to the first light receiving element with respect to a transmitting portion corresponding to the first receiving element in a third direction orthogonal to both the first direction and the second direction, wherein the distance in the first direction between the center of the first light-receiving-element row and the center of the first light receiving element is longer than a distance in the first direction between the center of the first light-receiving-element row and a center of the condensing portion corresponding to the first light receiving element, the distance, in the first direction, between the center of the first light-receiving-element row and the center of the second light receiving element is longer than a distance, in the first direction, between the first light-receiving-element row and a center of a condensing portion corresponding to the second light receiving element, a distance in the first direction between the center of the first light receiving element and the center of the condensing portion corresponding to the first light receiving element is longer than a distance, in the first direction, between the center of the second light receiving element and the center of the condensing portion corresponding to the second light receiving element, and wherein a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the first light receiving element positioned opposite to a center side of the first light-receiving-element row in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the first light receiving element positioned opposite to the center side in the first direction, a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the second light receiving element positioned opposite to the center side, in the first direction, is longer than a distance, in the first direction, between the center of the first light-receiving-element row and an end portion of the transmitting portion corresponding to the second light receiving element positioned opposite to the center side in the first direction, wherein the first light-receiving-element row includes a vertical wire extending in the second direction disposed between the center of the first light receiving element and the center of the second light receiving element in the first direction and includes a horizontal wire extending in the first direction, the vertical wire and the horizontal wire being disposed between the transmitting portion corresponding to the first light receiving element and the first light receiving element in the third direction, and wherein a transmitting portion corresponding to a light receiving element disposed on a third position in the first direction with respect to the first light-receiving-element row, a transmitting portion corresponding to a light receiving element disposed on the third position with respect to the second light-receiving-element row, and a transmitting portion corresponding to a light receiving element disposed on the third position with respect to the third light-receiving-element row, are a transmitting portions each of which transmits different light with each other. - View Dependent Claims (24)
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Specification