Patent application number | Description | Published |
20080225399 | Line Head and Image Forming Apparatus - A line head includes: a first lens array having a plurality of first lenses each having a convex surface as a light incidence surface; a second lens array that is arranged at a light-emitting surface side of the first lens array so as to be opposite to the first lens array and that has a plurality of second lenses, which are arranged at positions corresponding to the plurality of first lenses and each of which has a convex surface as a light incidence surface; and at least a light-emitting element provided for each of the first lenses at a light incidence side of the first lens array. | 09-18-2008 |
20090021571 | Line Head And An Image Forming Apparatus Using The Line Head - A line head, includes: a substrate which is transmissive and includes a first surface and a second surface facing the first surface; a plurality of light emitting elements which are arranged on the first surface of the substrate and emit light beams; a wiring which is arranged on the first surface of the substrate and is connected with the plurality of light emitting elements; a lens array that includes a plurality of imaging lenses which are arranged facing the light emitting elements at a side of the second surface of the substrate and focus the light beams emitted from the facing light emitting elements to form spots; and an optical sensor which detects the light beams emitted from the light emitting elements and is arranged on the second surface of the substrate. | 01-22-2009 |
20090041503 | Image Forming Device, Image Forming Method, and Exposure Head - An image forming device includes a photoconductor drum having a rotational shaft in a first direction, and an exposure head having a plurality of imaging optical systems disposed in the first direction and a second direction and each having a negative optical magnification, and a light emitting element substrate on which a plurality of light emitting elements are disposed, the plurality of light emitting elements emitting light beams imaged on the photoconductor drum by one of the imaging optical systems, and the light beams are imaged by the imaging optical systems disposed in the second direction on the photoconductive drum at positions different from each other in the second direction. | 02-12-2009 |
20090041504 | Light Exposure Head and Image Formation Apparatus Using the Same - A light exposure head includes a base; a substrate disposed on the base, the substrate having a plurality of light emitting elements disposed thereon; and n (n is an integer greater than or equal to one) imaging optical systems, each of which having a negative optical magnification, the imaging optical systems focusing light beams emitted from the plurality of light emitting elements disposed on the substrate. | 02-12-2009 |
20090103947 | Exposure Head, An Image Forming Apparatus and An Image Forming Method - An image forming apparatus, includes: a latent image carrier that moves in a moving direction; and an exposure head that includes a light emitting element which emits a light and an imaging optical system which images the light emitted from the light emitting element, and is adapted to form a spot on the latent image carrier, wherein a pitch in the moving direction of the latent image carrier between the spots formed by the different imaging optical systems is an integral multiple of a pixel pitch in the moving direction of the latent image carrier. | 04-23-2009 |
20090116970 | Exposure Head, an Image Forming Apparatus and an Image Forming Method - An exposure head, includes: imaging optical systems which are arranged in a first direction; light emitting elements which are arranged in a second direction orthogonal to or substantially orthogonal to the first direction and emit lights to be imaged by the imaging optical systems; a first wiring which is connected with the light emitting element located at a first side in the second direction; and a second wiring which is connected with the light emitting element located at a second side in the second direction. | 05-07-2009 |
20090129818 | Exposure Head, Image Forming Device, and Image Forming Method - An exposure head includes a substrate having a plurality of light emitting element rows each having a plurality of light emitting elements arranged in a first direction, the light emitting element rows being arranged in a second direction perpendicular or substantially perpendicular to the first direction, and an imaging optical system adapted to image light beams from the light emitting elements on an exposed surface to form respective light-collected sections, and two of the light emitting elements forming the light-collected sections adjacent to each other in the first direction are respectively disposed in the light emitting element rows different from each other, and one of the light emitting element rows is disposed so as to match or substantially match with the meridian plane of the imaging optical system. | 05-21-2009 |
20090129819 | Exposure Head and Image Forming Device - An exposure head includes an imaging optical system arranged in a first direction, and first and second light emitting elements disposed in a second direction substantially perpendicular to the first direction that emit light beams to be imaged by the imaging optical system to form light-collected sections adjacent to each other in the first direction. A first wiring is electrically connected to and extended out from the first light emitting element to one side in the second direction. A second wiring is electrically connected to and extended out from the second light emitting element to the one side in the second direction. | 05-21-2009 |
20090141114 | Line Head and an Image Forming Apparatus Using the Line Head - A line head, includes: a head substrate; a first light emitting element group which is arranged on the head substrate and includes a first light emitting element and a second light emitting element; a second light emitting element group and a third light emitting element group which are arranged in a first direction on the head substrate; a first wiring which is arranged between the second and the third light emitting element groups on the head substrate and is electrically connected with the first light emitting element; a second wiring which is arranged between the second and the third light emitting element groups on the head substrate and is electrically connected with the second light emitting element; and a connecting portion which is arranged on the head substrate and is electrically connected with the first and the second wirings. | 06-04-2009 |
20090141115 | Line Head, Image Forming Apparatus Incorporating the Same, and Method of Adjusting Position of the Same - In a line head, a plurality of light emitters are arrayed on a substrate in a first direction. Each of the light emitters is operable to emit a light beam. In a rod lens array, a plurality of rod lenses are arrayed in the first direction, and each of the rod lenses is adapted to focus the light beam emitted from an associated one of the light emitters onto a target surface. The substrate and the rod lens array are attached to a holder elongated in the first direction. Positioning members are provided at both end portions of the holder in the first direction. A relative position between the substrate and at least one of the positioning members is variable in a second direction perpendicular to the first direction. | 06-04-2009 |
20090147278 | Line Head and Image Forming Apparatus Using the Line Head - A line head includes a head substrate, a first light-emitting element group having first light-emitting elements, a second light-emitting element group having second light-emitting elements, a first wiring line disposed on the head substrate and electrically connected to the first light-emitting elements, a second wiring line disposed on the head substrate and electrically connected to the second light-emitting elements, a first connecting unit disposed on one side of the head substrate and electrically connected to the first wiring line, and a second connecting unit disposed on the other side of the head substrate and electrically connected to the second wiring line. | 06-11-2009 |
20090153642 | Exposure Head, A Method Of Controlling An Exposure Head And An Image Forming Apparatus - An exposure head, includes: an imaging optical system; a first light emitting element that emits a light which is to be focused by the imaging optical system; a second light emitting element that emits a light which is to be focused by the imaging optical system; a first TFT circuit that is connected with the first light emitting element via an interconnection wire; and a second TFT circuit that is connected with the second light emitting element via an interconnection wire, wherein the first light emitting element and the second light emitting element are provided between the first TFT circuit and the second TFT circuit. | 06-18-2009 |
20090153643 | Image Forming Device and Image Forming Method - An image forming device includes: an exposure head having a plurality of light emitting elements arranged in a first direction, a first imaging optical system adapted to image light emitted from the light emitting elements, and a second imaging optical system disposed in a second direction with respect to the first imaging optical system; a latent image carrier movable in the second direction; a detection section adapted to detect a moving time the latent image carrier takes to move from a first position to a second position in the second direction; and a control section adapted to control the time from emission of a first part of the light emitting elements adapted to emit light to be imaged by the first imaging optical system to emission of a second part of the light emitting elements adapted to emit light to be imaged by the second imaging optical system based on the detection result of the detection section, thereby aligning a latent image formed on the latent image carrier by the first imaging optical system and a latent image formed on the latent image carrier by the second imaging optical system in the first direction. | 06-18-2009 |
20090160926 | Exposure Head and an Image Forming Apparatus - An image forming apparatus, includes: a latent image carrier that moves in a first direction; an exposure head that includes a first imaging optical system, a second imaging optical system that is distanced from the first imaging optical system in the first direction, a light emitting element that emits a light to be imaged on the latent image carrier by the first imaging optical system and a light emitting element that emits a light to be imaged on the latent image carrier by the second imaging optical system; and a controller that is adapted to control a light quantity of the light emitting element that emits a light to be imaged on the latent image carrier by the first imaging optical system in accordance with an imaging characteristic of the first imaging optical system. | 06-25-2009 |
20090168086 | Line Head Control Method, Image Forming Method, and Image Forming Apparatus - A control method of a line head including a first image forming system; a first light emission element which emits light for forming an image by an image forming lens of the first image forming system; a second image forming system disposed in a first direction of the first image forming system; and a second light emission element which emits light for forming an image by an image forming lens of the second image forming system is disclosed. The method includes, when the first light emission element emits light at a time t | 07-02-2009 |
20090185287 | Line Head and an Image Forming Apparatus - A line head includes: a first lens formed from a resin and on a glass substrate; and a light emitting element substrate that has light emitting elements arranged in a first direction, wherein a cross section of the first lens taken in the first direction and including an optical axis of the first lens has a configuration wherein a curvature of the first lens at the optical axis has a smaller absolute value than a curvature of an outer peripheral portion of the first lens. | 07-23-2009 |
20100039489 | Line Head and Image Forming Apparatus Using the Same - A line head includes multiple light emitting element groups each including multiple light emitting elements. In each light emitting element group, the multiple light emitting elements are disposed in a two-dimensional arrangement so that a distance Gx is greater than a distance Gy. The light emitting element groups are arranged so that pitches Px are greater than pitches Py. | 02-18-2010 |
20100045768 | Exposure Head, Method of Controlling Exposure Head, and Image Forming Apparatus - An exposure head includes a substrate in which a first light emitting device and a second light emitting device are arranged in a direction parallel or substantially parallel to a moving direction of an exposed side to the imaged light. An imaging optical system is provided for imaging light from the first light emitting device and the second light emitting device to expose the exposed side. A control unit selects one light emitting device from the first light emitting device and the second light emitting device, allowing the selected light emitting device to emit light in accordance with a driving signal, and allowing the non-selected light emitting device to not emit light. | 02-25-2010 |
20100046970 | Exposure Head, Method of Controlling Exposure Head, and Image Forming Apparatus - An exposure head includes: a first light emitting device group including light emitting devices disposed at different positions in a direction perpendicular or approximately perpendicular to a moving direction of an exposed side; a second light emitting device group disposed in the moving direction of the exposed side with respect to the first light emitting device group; an imaging optical system imaging light from the light emitting devices to expose the exposed side; and a control unit allowing one light emitting device group out of either the first light emitting device group or the second light emitting device group to emit light on the basis of a driving signal. | 02-25-2010 |
20100067954 | Line Head and Image Forming Apparatus - A line head includes: a support member; a light emitting substrate unit having a first substrate supported by the support member and a plurality of light emitting elements arranged in a first direction of the first substrate; a circuit board unit having a second substrate and at least one interface circuit, which is provided to the second substrate, and to which at least one signal for driving the light emitting elements is input; and a flexible printed circuit board having a wiring pattern adapted to electrically connect the light emitting substrate unit and the circuit board unit to each other, wherein the flexible printed circuit board is disposed so as to be connected at an end of the second substrate in a second direction one of perpendicular and substantially perpendicular to the first direction, and is folded back from one end to the other end. | 03-18-2010 |
20100086331 | Exposure Head and Image Forming Device - An exposure head includes a substrate through which light from light-emitting elements provided on a first surface of the substrate penetrates from the first surface to a second surface. A rod lens array is provided on the second surface of the substrate to image the light from the second surface. A light transparent member is provided between the substrate and the rod lens array and fixed to the second surface of the substrate and the rod lens array. A support member supports the first surface of the substrate. | 04-08-2010 |
20100135699 | Exposure Head and Image Forming Apparatus - An exposure head includes: a group of light emitting elements in which light emitting elements are arranged in a first direction; a light emitting element substrate in which the group of light emitting elements is arranged in the first direction and in a second direction orthogonal or substantially orthogonal to the first direction; and a driving substrate which drives the light emitting elements arranged on the light emitting element substrate, wherein the driving substrate controls a light emission intensity of a light emitting element that is near to an end side in the first direction of the group of the light emitting elements, among the light emitting elements constituting the group of the light emitting elements, so that the intensity is smaller than the light emission intensity of a light emitting element constituting the group of the light emitting elements different from the above light emitting element, and the light emission intensity becomes smaller towards the end side. | 06-03-2010 |
20100201778 | Line Head and an Image Forming Apparatus Using Such a Line Head - A line head, includes: a substrate which is provided with a plurality of luminous element groups which respectively include a plurality of luminous elements in a first direction which emit light beams; a lens array which includes a plurality of imaging lenses which are provided corresponding to the plurality of luminous element groups; and a light shielding member which is disposed between the substrate and the lens array and includes a plurality of light guiding holes which correspond to the plurality of luminous element groups, wherein the lens array is away from the light shielding member, an inner diameter of each of the plurality of light guiding holes in the first direction is a first light guiding hole diameter, and a bore diameter of each of the plurality of imaging lenses in the first direction is a first lens diameter, and the first light guiding hole diameter is smaller than the first lens diameter. | 08-12-2010 |
20100225731 | Exposure Head, Image Forming Apparatus, and Image Forming Method - An exposure head includes a light emitting segment that emits light; an electrical load that is electrically connected to a circuit in which a current to be supplied to the light emitting segment flows; and a current supply controller that supplies a first current to the light emitting segment to cause the light emitting segment to emit light and supplies a second current to the electrical load during the time when the current supply controller blocks the supply of the first current to the light emitting segment. | 09-09-2010 |
20100329744 | Line Head and an Image Forming Apparatus Using the Line Head - A line head, includes: a microlens array in which a plurality of microlenses having a magnification whose absolute value is below 1 are arranged in a main scanning direction of a surface-to-be-scanned, and a plurality of luminous element groups which are arranged in a one-to-one correspondence with the respective plurality of microlenses, wherein in each of the plurality of luminous element groups, a plurality of luminous elements are arranged at mutually different main-scanning-direction positions in the main scanning direction, the plurality of luminous elements are respectively caused to emit lights at timings in conformity with a movement of the surface-to-be-scanned in a sub scanning direction, and light beams emitted from the plurality of luminous elements are imaged on the surface-to-be-scanned at mutually different main-scanning-direction positions in the main scanning direction to form a plurality of spots side by side on the surface-to-be-scanned in the main scanning direction, and in each of the plurality of luminous element groups, out of the plurality of luminous elements constituting the luminous element group, two luminous elements caused to emit lights to form adjacent spots are arranged at mutually different sub-scanning-direction positions in the sub scanning direction. | 12-30-2010 |
20110123210 | Image Forming Device and Image Forming Method - An image forming device includes: an exposure head having a plurality of light emitting elements arranged in a first direction, a first imaging optical system adapted to image light emitted from the light emitting elements, and a second imaging optical system disposed in a second direction with respect to the first imaging optical system; a latent image carrier movable in the second direction; a detection section adapted to detect a moving time the latent image carrier takes to move from a first position to a second position in the second direction; and a control section adapted to control the time from emission of a first part of the light emitting elements adapted to emit light to be imaged by the first imaging optical system to emission of a second part of the light emitting elements adapted to emit light to be imaged by the second imaging optical system based on the detection result of the detection section, thereby aligning a latent image formed on the latent image carrier by the first imaging optical system and a latent image formed on the latent image carrier by the second imaging optical system in the first direction. | 05-26-2011 |