Abstract: 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.

Abstract: A line head, includes: an element substrate that includes luminous element groups as groups of a plurality of luminous elements; and a lens array that includes lenses which have an optical property of inverting or non-unity-magnification, focus light from the luminous element groups to form spot groups on an image plane, and are provided corresponding to the respective luminous element groups, wherein the plurality of luminous elements are two-dimensionally arranged in point symmetry in each luminous element group, a plurality of spots are formed as the spot group when the respective luminous elements of the luminous element group emit light, and an inter-point distance between an intersection of a line extending from a symmetry center of the luminous element group in an optical axis direction of the lens with the image plane and a center of gravity position of the spot group is shorter than a specified distance.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present invention relates to an optical scanning device in which a light beam is incident twice on a deflective reflecting facet and its object is to reduce curvature in scanning line trail or make the curvature substantially zero, or correct scanning line displacement due to the curvature in scanning line trail. Two stationary plane mirrors (13, 14) are disposed to face a deflective reflecting facet (11) which can be rotated about its rotational axis (12) such that a light beam (a1) being incident on and reflected from the deflective reflecting facet (11) is reflected by the two stationary plane mirrors (13, 14) sequentially. The reflected light beam (a3) is incident on and reflected by the deflective reflecting facet (11) again.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An optical head is adapted to form an electrostatic latent image on an image carrier. A transparent substrate has a first face adapted to oppose the image carrier and a second face opposing the first face. An organic EL photo emitter is disposed so as to oppose the second face of the substrate. In the photo emitter, a light emitting layer is adapted to emit light irradiating the image carrier to form the electrostatic latent image. An electrode layer is laminated on the light emitting layer. A reflection reducer eliminates stray light generated when the light emitted from the light emitting layer is reflected by at least the electrode layer.

Abstract: 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.

Abstract: A line head, includes: a lens array that includes a first lens, a second lens and a light transmissive substrate on which the first lens and the second lens are arranged in a first direction; and a light emitting element substrate on which light emitting elements are arranged in the first direction, wherein the first lens is formed such that, in a cross section in the first direction including an optical axis of an imaging optical system comprised of the first lens, a curvature of the first lens at an outer peripheral portion has a sign opposite to that of a curvature of the first lens on the optical axis or has a smaller absolute value than the curvature of the first lens on the optical axis.

Abstract: 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 t0 and then emits light after a time t1 from the time t0, and also when the second light emission element emits light after a time t2 from the time t0, controlling the time t1 and the time t2 such that t2?n·t1 (n: 2 or larger integer) holds.

Abstract: 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.

Abstract: 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 sy

Abstract: 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.

Abstract: 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.