Light source device, image reading apparatus and image reading method

An image reading apparatus for reading an image on an original, comprising:

• a light source device including
• a light source for emitting light,
• a temperature detecting section for detecting a temperature of the light source,
• a temperature adjusting element for adjusting the temperature of the light source by effecting at least one of heat absorption and heat radiation,
• a heat radiating member for radiating heat of at least one of the light source and the temperature adjusting element, the heat radiating member being disposed in direct contact with a housing body of the device, and
• a control section for controlling the temperature adjusting element so that a temperature detected by the temperature detecting section becomes a predetermined temperature;
• an image sensor for receiving light emitted from the light source device and reflected by or transmitted through the original, thereby reading an image on the original;
• and
• a device temperature detecting section for detecting a temperature at a position within the image reading apparatus and outside the light source device,
• wherein only when the temperature detected by the device temperature detecting section becomes a prefixed temperature or higher, the control section of the light source device controls the temperature adjusting element.

An image reading apparatus for reading an image on an original, comprising:

• a light source device including
• a light source including a plurality of light emitting elements arranged on a substrate,
• a temperature detecting section for detecting a temperature of the light source,
• a temperature adjusting element for adjusting the temperature of the light source by effecting at least one of heat absorption and heat radiation,
• a heat radiating member for radiating heat of at least one of the light source and the temperature adjusting element, the heat radiating member being disposed in direct contact with a housing body of the device,
• an urging section for integrally forming the light source, the temperature adjusting element, and the heat radiation member by urging force thereof, and
• a control section for controlling the temperature adjusting element so that a temperature detected by the temperature detecting section becomes a predetermined temperature;
• an image sensor for receiving light emitted from the light source device and reflected by or transmitted through the original, thereby reading an image on the original;
• and
• a device temperature detecting section for detecting a temperature at a position within the image reading apparatus and outside the light source device,
• wherein only when the temperature detected by the device temperature detecting section becomes a prefixed temperature or higher, the control section of the light source device controls the temperature adjusting element.

An image reading method by use of an image reading apparatus for reading an image on an original, in which the image reading apparatus comprises a light source device and a device temperature detecting section for detecting a temperature at a position within the image reading apparatus and outside the light source device, said device temperature detecting section being provided separate from said light source device, said light source device including

• a light source for emitting light;
• a temperature detecting section for detecting a temperature of the light source;
• a temperature adjusting element for adjusting the temperature of the light source by effecting at least one of heat absorption and heat radiation;
• a heat radiating member for radiating heat of at least one of the light source and the temperature adjusting element, the heat radiating member being disposed in direct contact with a housing body of the device;
• and
• a control section for controlling the temperature adjusting element so that a temperature detected by the temperature detecting section becomes a predetermined temperature,
• the method comprising controlling the temperature adjusting element by the control section of the light source device only when the temperature detected by the device temperature detecting section becomes a prefixed temperature or higher.

An image reading method by use of an image reading apparatus for reading an image on an original, in which the image reading apparatus comprises a light source device and a device temperature detecting section for detecting a temperature at a position within the image reading apparatus and outside the light source device, said device temperature detecting section being provided separate from said light source device, said light source device including

• a light source including a plurality of light emitting elements arranged on a substrate;
• a temperature detecting section for detecting a temperature of the light source;
• a temperature adjusting element for adjusting the temperature of the light source by effecting at least one of heat absorption and heat radiation;
• a heat radiating member for radiating heat of at least one of the light source and the temperature adjusting element, the heat radiating member being disposed in direct contact with a housing body of the device;
• an urging section for integrally forming the light source, the temperature adjusting element, and the heat radiation member by urging force thereof;
• and
• a control section for controlling the temperature adjusting element so that a temperature detected by the temperature detecting section becomes a predetermined temperature,
• the method comprising controlling the temperature adjusting element by the control section of the light source device only when the temperature detected by the device temperature detecting section becomes a prefixed temperature or higher.

A light source comprising:

• a light source emitting section comprising:
• a light source for emitting light,
• a temperature detecting section for detecting a temperature of the light source,
• a temperature element for adjusting the temperature of the light source by effecting at least one of heat absorption and heat radiation, and
• a heat radiating member for radiating heat of at least one of the light source and the temperature adjusting element;
• a housing body having an opening, the heat radiating member being disposed in contact with the housing body;
• and
• a control section for controlling the temperature adjusting element so that a temperature detected by the temperature detecting section becomes a predetermined temperature,
• wherein the light source, the temperature adjusting element and the heat radiating member are combined integrally by an urging member to form the light source section, and the light source section is attached at the opening of the housing body by an attaching member.