Image reading apparatus
First Claim
Patent Images
1. An image reading apparatus comprising:
- a light source for irradiating a document sheet with light;
an elongated light-leading member for propagation of light emitted from the light source, the light-leading member being provided with a head surface, a bottom surface, a first side surface and a second side surface, the first and second side surfaces extending between the head surface and the bottom surface;
a row of image sensor chips for detecting light reflected on the document sheet; and
a circuit board for carrying the image sensor chips;
wherein the light source is mounted on the circuit board together with the image sensor chips, the light source being spaced from the row of the image sensor chips on the circuit board, the light source facing the bottom surface of the light-leading member, the head surface of the light-leading member being offset from the bottom surface in a direction from the light source to the row of image sensor chips.
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Abstract
An image reading apparatus is provided which includes light source for irradiating a document sheet with light, an elongated light-leading member through which light emitted from the light source propagates. The light-leading member is provided with a head surface, a bottom surface, a first side surface and a second side surface. The image reading apparatus further includes a row of image sensor chips for detecting light reflected on the document sheet, and an insulating circuit board for carrying the image sensor chips. The light source is also mounted on the circuit board. The cross section of the light-leading member is pentagonal, parabolic, or elliptic.
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Citations
17 Claims
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1. An image reading apparatus comprising:
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a light source for irradiating a document sheet with light;
an elongated light-leading member for propagation of light emitted from the light source, the light-leading member being provided with a head surface, a bottom surface, a first side surface and a second side surface, the first and second side surfaces extending between the head surface and the bottom surface;
a row of image sensor chips for detecting light reflected on the document sheet; and
a circuit board for carrying the image sensor chips;
wherein the light source is mounted on the circuit board together with the image sensor chips, the light source being spaced from the row of the image sensor chips on the circuit board, the light source facing the bottom surface of the light-leading member, the head surface of the light-leading member being offset from the bottom surface in a direction from the light source to the row of image sensor chips.
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2. A light equipment used in an image reader comprising:
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a light source;
an elongated light-leading member for propagation of light emitted from the light source, the light-leading member being provided with a head surface, a bottom surface, a first side surface, a second side surface, a first end and a second end opposite to the first end, the first and second side surfaces extending between the head surface and the bottom surface; and
reflecting means for covering at least one of the first and the second side surfaces;
wherein the light source faces the bottom surface at the second end of the light-leading member, the light-leading member being provided with a reflection surface inclined with respect to the bottom surface at the second end of the light-leading member for reflecting light emitted from the light source toward the first end of the light-leading member. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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11. An image reading apparatus comprising:
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a light source for irradiating a document sheet with light;
an elongated light-leading member for propagation of light emitted from the light source, the light-leading member being provided with a head surface, a bottom surface, a first side surface, a second side surface, a first end and a second end opposite to the first end, the first and second side surfaces extending between the head surface and the bottom surface; and
reflecting means for covering at least one of the first and the second side surfaces;
a row of image sensor chips for detecting light reflected on the document sheet; and
a circuit board for carrying the image sensor chips;
wherein the light source is mounted on the circuit board together with the image sensor chips and faces the bottom surface at the second end of the light-leading member, the light-leading member being provided with a reflection surface inclined with respect to the bottom surface at the second end of the light-leading member for reflecting light emitted from the light source toward the first end of the light leading member. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification