摘要:
An optical head that forms latent images on a photosensitive material by a multiple-exposure method is driven at higher speed. This optical head comprises a plurality of light emitting elements arranged in a specific direction, a storage unit for receiving and storing data corresponding to one pixel, a shift register having a plurality of registers respectively corresponding to the plurality of light emitting elements, the shift register receiving the data stored in the storage unit and successively shifting the data of each register, and an element drive circuit for lighting the corresponding light emitting elements on the basis of the data in each register of the shift register, wherein the plurality of light emitting elements arranged in the specific direction are successively lighted, and one pixel is subjected to multiple exposure.
摘要:
Provided is an exposure head controller that controls, via pulse width modulation control, the emission quantity of each light emitting element in an exposure head having a light emitting element array formed by arranging a plurality of light emitting elements in a main scanning direction and a sub scanning direction orthogonal thereto, comprising: a data retention unit that retains dot gathering control data showing whether to emit each light emitting element at the starting point side, terminal point side or in the middle of an emission period corresponding to a 1 pixel pitch in the sub scanning direction, or to divide and emit each light emitting element at the starting point side and terminal point side, emission time data showing the emission time of each light emitting element, and skew data showing the skew quantity of each light emitting element a dot gathering operation circuit provided to each light emitting element and which operates the time in which the light emitting element is to be retained in a non-emission state from the starting point of the emission based on the dot gathering control data input from the data retention unit; a delay time measurement circuit that acquires the skew data from the data retention unit and acquires the non-emission time data showing the retention time in the non-emission state from the dot gathering operation circuit, adding these to seek the delay time to be set before starting the emission of the light emitting element, measuring the delay time, and outputting a prescribed signal after the lapse of the delay time; and an emission instruction circuit that outputs to a light emitting element drive circuit an emission instruction signal for instructing the emission of the light emitting element from the point in time the emission time data is acquired from the data retention unit and a prescribed signal is output from the delay time measurement circuit up to the elapse of the emission time indicated by the emission time data.
摘要:
A plurality of photo emitters are arrayed on a transparent substrate in a first direction to form at least one photo emitter array. An electrode is provided on the substrate and electrically connected to the photo emitters in common. A dimension of the electrode in a second direction perpendicular to the first direction is smaller than a dimension of the substrate in the second direction.
摘要:
A photosensitive member is movable in a first direction. A line head is provided with a plurality of organic-EL photo emitters, arrayed in a second direction perpendicular to the first direction to form a plurality of photo emitter arrays arranged in the first direction. A plurality of imaging lenses are arrayed in the second direction to form at least one lens array, so that an array of pixels defined on the photosensitive member are subjected to multiple exposure to light emitted from the photo emitter arrays in accordance with the movement of the photosensitive member, thereby forming an electrostatic latent image on the photosensitive member. At least one chromatic-aberration correcting lens is adapted to correct chromatic aberration of the imaging lenses relative to the first direction, and disposed between the photo emitter arrays and the lens array.
摘要:
At least one light emission array includes a plurality of light emitting elements arrayed in a first direction. Each of the light emitting elements is an organic electroluminescence element. A monitor quantitatively monitors a light emitting state of at least one of the light emitting elements to obtain a monitored amount. A comparator compares the monitored amount and a reference amount. A controller performs a constant current control with respect to at least one of the light emitting elements in accordance with a result of the comparison performed by the comparator.
摘要:
In a line head, a plurality of element arrays arranged in a first direction. Each array includes a plurality of light emission elements arrayed in a second direction which is perpendicularly to the first direction. The light emission elements emit light for forming an electrostatic latent image on a photosensitive surface of an image carrier. A switcher activates the light emission elements in at least one of the element arrays while deactivating the others. A developer develops the latent image as a visible image with toner.
摘要:
An image forming apparatus includes an image processing unit that has line heads that include a plurality of light sources disposed in a line shape in a main scanning direction, causes each light source to emit light onto image data to form pixels on an exposed surface, and performs image exposure, and creates two-dimensional image data to be printed on the basis of an image signal from the outside and an operation instruction. The image processing unit corrects the two-dimensional image data such that a density irregularity is corrected on the basis of light amount data and/or optical characteristic data for each of the pixels for the line heads, according to a correction value created on the basis of the light amount data and/or optical characteristic data for each of the pixels of the line heads.
摘要:
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.
摘要:
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.
摘要:
An image forming apparatus is provided. The image forming apparatus includes a latent image carrier on which a latent image is formed, a line head that exposes the latent image carrier, and a developing section that develops the latent image. The line head includes a substrate, a light emitting element disposed on the substrate in a first direction, and a wiring installed on the substrate so as to be withdrawn from one end of the substrate in a second direction perpendicular to or substantially perpendicular to the first direction. The one end is disposed to be the developing section side.