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AssigneeSeiko Epson Corporation
InventorsMitsukazu Kurose, Yujiro Nomura, Kiyoshi Tsujino, Ken Ikuma
Estimating the term…
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.
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:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Using printers: by photographic printing , e.g. by laser printers
Constructional details, e.g. mounting of circuits in the carrier: the record carrier comprising means for customization, e.g. being arranged for…
Constructional details, e.g. mounting of circuits in the carrier: the record carrier being manufactured in a continuous process, e.g. using…
The record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card:…
About 3 months of term left · ends 8 Feb 2027 (estimated)
The entire disclosure of Japanese Patent Application No. 2004-362424 filed on Dec. 15, 2004 including specification, claims, drawings and summary are incorporated herein by reference in its entirety.
1. Technical Field
The present invention pertains to an exposure head to be used for forming a latent image by exposing a photoreceptor in an image formation device such as an electrophotographic printer or copying machine.
FIG. 1 is a plan view of the overall exposure head of an embodiment viewed from the topside thereof;
FIG. 2 is a partially enlarged view of portion A of the exposure head shown in FIG. 1;
FIG. 3 is a cross section in the direction of line III-III shown in FIG. 2;
Embodiments of the invention are now explained with reference to the drawings.
Overall Configuration of Exposure Head
FIG. 1 is a plan view of the overall exposure head of an embodiment viewed from the topside thereof. The exposure head 1 shown in FIG. 1 is used for forming a latent image by exposing a photoreceptor in an image formation device such as a printer or copying machine. The exposure head 1 is formed such that the overall length thereof is slightly longer than the printing width of the main scanning direction. Incidentally, since the actual cross section size of the exposure head 1 is extremely small, FIG. 1 is not able to provide a sufficient representation. Thus, enlarged views and the like will be hereinafter used as appropriate for providing detailed explanations of the invention. Further, a connector 2 is provided at one end of the exposure head 1, and the exposure head 1 is connected to an image data transmission unit (described later) on the printer engine side via this connector 2.