Loading patent…
AssigneeCannon Kabushiki Kaisha
InventorsTatsundo Kawai, Osamu Hamamoto, Shinichi Takeda, Satoshi Itabashi, Toshimitsu Iso
Estimating the term…
There is disclosed an illumination device in which a light guide is adapted to emit the light from a face thereof and is provided with an area, on a face opposite to the light emitting face, for diffusing and/or reflecting the light introduced into the light guide from an end face thereof or is provided with uneven light emitting characteristics along the longitudinal direction of the light guide, and the center of the light source positioned at the end of the light guide is placed at a position aberrated from the normal line to said area, whereby attained are compactness, a low cost, a low electric power consumption, a high efficiency of utilization of the light emitted by the light source, and excellent and uniform illumination characteristics. There are also disclosed an image reading device and an information processing apparatus, equipped with the above-mentioned illumination device.
A light guide comprising a light transparent member provided, on an end portion thereof, with a light entrance face and, on a face along the longitudinal direction, different from said end portion, with a light exit face for emitting the introduced light, comprising an area provided along said longitudinal direction in a part of the side opposite to said light exit face and adapted to reflect and/or diffuse the light introduced into said light transparent member, said area being arranged so that a normal line passing through a center of a width of said area is shifted from a center of an edge and a surface parallel to the edge of said light guide.
An illumination device comprising a translucent member provided, on an end portion thereof, with a light entrance face and, on a face along the longitudinal direction, different from said end portion, with a light exit face for emitting the introduced light;
An information processing apparatus provided with:
An information processing apparatus according to claim 40, wherein said capping means includes an ink absorbent member.
An image reading device including a translucent member provided, on an end portion thereof, with a light entrance face and, on a face along the longitudinal direction, different from said end portion, with a light exit face for emitting the introduced light, a light source for emitting the light to be introduced from said light entrance face, and a photoelectric converting device for receiving the light emitted from said light exit face and reflected by an illuminated surface, wherein said translucent member comprises an area provided along said longitudinal direction in a part of the side opposite to said light exit face and adapted to reflect and/or diffuse the light introduced in said translucent member, and the center of said light source is placed in a position aberrated from the direction of the normal line to said area.
A light guide comprising a light transparent member provided, on an end portion thereof, with a light entrance face and, on a face along the longitudinal direction, different from said end portion, with a light exit face for emitting the introduced light, comprising an area having a protruding section of said light transparent member provided along said longitudinal direction, and adapted to reflect and/or diffuse the light introduced into an end of said protruding section opposite to said light exit face.
Dependencies are inferred from the claim text.