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US 8,085,449 B2Granted
Image sensor and image forming apparatus
AssigneeToshiba Design & Manufacturing Service Corporation
InventorMiyoshi Yoshimura
Life of this patent
Estimating the term…
Abstract
An image sensor includes a housing which receives heat of a circuit board, and a light source which is supported in the housing and radiates light toward a document. The light source is an EL light-emitting element including a light emission section which emits light by organic electroluminescence. The EL light-emitting element extends in a line shape along a scanning direction. A thermal diffusion layer is interposed between the EL light-emitting element and the housing.
Claims14
An image sensor comprising:
- a housing which receives heat of an exothermic body;
- and
- an EL light-emitting element which emits light by organic electroluminescence, the EL light-emitting element being supported by the housing along a scanning direction and radiating light toward a to-be-scanned object;
- and
- a thermal diffusion layer interposed between the EL light-emitting element and the housing, the thermal diffusion layer being provided over the entire length of the EL light-emitting element and diffusing heat conducting from the exothermic body to the EL light-emitting element via the housing.
2 more elements
An image sensor comprising:
- an EL light-emitting element including a light emission section which emits light by electroluminescence, the EL light-emitting element radiating light from the light emission section toward a to-be-scanned object and extending in a line shape along a scanning direction;
- a housing which supports the EL light-emitting element;
- a circuit board which is supported in the housing and produces heat in operation;
- and
- a thermal diffusion layer which is interposed between the EL light-emitting element and the housing, the thermal diffusion layer diffusing heat conducting to the EL light-emitting element from the circuit board via the housing over the entire length of the EL light-emitting element.
2 more elements
An image sensor comprising:
- an EL light-emitting element including a light emission section which emits light by electroluminescence, the EL light-emitting element radiating light from the light emission section toward a to-be-scanned object and extending in a line shape along a scanning direction;
- a housing which supports the EL light-emitting element;
- and
- a circuit board which is supported in the housing and on which a circuit component, which produces heat, is mounted at a position corresponding to an intermediate part in a longitudinal direction of the EL light-emitting element,
- wherein the light emission section of the EL light-emitting element has a light emission surface extending in the scanning direction, the light emission surface having a first end portion, a second end portion which is located on a side opposite to the first end portion, and an intermediate part which is located between the first end portion and the second end portion, a light-shield layer being formed on the light emission surface, the light-shield layer varying a light intensity distribution of the light emission surface such that a light intensity at the first and second end portions becomes higher than a light intensity at the intermediate part.
2 more elements
An image sensor comprising:
- an EL light-emitting element including a light emission section which emits light by electroluminescence, the EL light-emitting element radiating light from the light emission section toward a to-be-scanned object and extending in a line shape along a scanning direction;
- a housing which supports the EL light-emitting element;
- a circuit board which is supported in the housing and on which a circuit component, which produces heat, is mounted at a position corresponding to an intermediate part in a longitudinal direction of the EL light-emitting element;
- a transparent plate which is interposed between the EL light-emitting element and the to-be-scanned object;
- and
- a light-shield layer which is provided on the transparent plate and varies a light intensity distribution of the EL light-emitting element.
3 more elements
An image forming apparatus including a transfer path which transfers a to-be-scanned object;
- and an image sensor which is disposed on the transfer path and optically scans image information from the to-be-scanned object, the image sensor comprising:
- an EL light-emitting element including a light emission section which emits light by electroluminescence, the EL light-emitting element radiating light from the light emission section toward the to-be-scanned object and extending in a line shape along a scanning direction;
- a housing which supports the EL light-emitting element;
- a circuit board which is supported in the housing and produces heat in operation;
- and
- a thermal diffusion layer which is interposed between the EL light-emitting element and the housing, the thermal diffusion layer diffusing heat conducting to the EL light-emitting element from the circuit board via the housing over the entire length of the EL light-emitting element.
3 more elements
Dependencies are inferred from the claim text.