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:
An image-forming device includes a conveying part, an image-forming part, first through third sensors, and a control part. The conveying part is configured and arranged to convey a continuous recording material. The image-forming part is configured and arranged to form an image on the recording material conveyed by the conveying part. The first through third sensors are configured and arranged to detect positions of an edge surface of the recording material conveyed by the conveying part. The control part is configured to calculate first through third shifting amounts based on the positions of the edge surface of the recording material simultaneously detected by the first through third sensors, respectively. The first shifting amount is generated by movement of the recording material, the second shifting amount is generated by rotation of the recording material, and the third shifting amount is generated by fluctuations in the edge surface of the recording material.
摘要:
Provided is a line head including: a light emitting device array in which N (N is an integer of 2 or more) light emitting device groups including a plurality of light emitting devices is arranged; an output unit which sequentially outputs driving signals for driving the light emitting devices of the light emitting device groups to the light emitting device groups; and a delay unit which delays input timings when the driving signals output from the output unit are input to the light emitting devices, wherein the delay unit delays the input timings of the 1 to (N−1)th driving signals output from the output unit to the input timings of the Nth driving signals output from the output unit, and allows the light emitting devices of the different light emitting device groups simultaneously to emit light.
摘要:
An exposure head, includes: a lens array that includes a light transmissive substrate whose length in a first direction is greater than a length thereof in a second direction orthogonal to the first direction, a first lens that is arranged on the light transmissive substrate, and a second lens that is arranged on the light transmissive substrate at the first direction of the first lens, the first lens and the second lens being connected in the first direction; and a head substrate that is provided with a first light emitting element that emits a light toward the first lens and a second light emitting element that emits a light toward the second lens.
摘要:
A line head includes a positive lens system having two lenses, image-side and object-side lens arrays, a light emitter array on an object side of the positive lens system, and an aperture plate that forms an aperture diaphragm. Where the row number of lenses arrayed in a second direction is ‘m’, a gap between effective regions of two image-side lenses adjacent to each other in a first direction is ‘α’, an image-side angle of aperture is ‘θi’, a width of light-emitting elements images in the first direction is ‘Wi’, a focal length of the image-side lens is ‘f2’ and a distance from an image-side principal plane of the image-side lens to an image surface is ‘Si’, the following conditions are satisfied: f2≦(mWi−α)/(2θi), Wi≧2Siθi/(m−1)+α/(m−1).
摘要翻译:线头包括具有两个透镜的正透镜系统,图像侧和物体侧透镜阵列,正透镜系统的物体侧上的发光体阵列和形成孔径光阑的孔径板。 在第二方向排列的透镜的行数为“m”的情况下,在第一方向上彼此相邻的两个图像侧透镜的有效区域之间的间隙为“α”,孔径的图像侧角度为“ ; i'中,第一方向上的发光元件图像的宽度为“Wi”,图像侧透镜的焦距为“f2”,距离图像侧透镜的图像侧主面的距离 对于图像面为“Si”,满足以下条件:f2≦̸(mWi-α)/(2&Thetas; i),Wi≥2Si&Thetas; i /(m-1)+α/(m-1)。
摘要:
An optical scanning device 65 is adapted to bring a deflector mirror plane 651 into independent pivotal motions about a first axis and a second axis perpendicular to each other. A mirror driver section including a first axis driver and a second axis driver is so controlled as to bring the deflector mirror plane 651 into pivotal motion about the first axis thereby deflecting a light beam L for scanning along a main scan direction. On the other hand, the deflector mirror plane 651 is pivotally moved about the second axis thereby to adjust the scanned beam L for its position on a photosensitive member 2 with respect to a subscan direction. Thus, even if the scanned beam is deviated from a reference scan position with respect to the subscan direction due to component tolerances or assembly errors, such a deviation can be corrected.
摘要:
A lens array includes: a light transmissive lens array substrate; a plurality of lenses disposed on the lens array substrate in a first direction; and a line-like mark formed on the lens array substrate in a second direction one of perpendicular and substantially perpendicular to the first direction.