JP2010099971A - Exposure controller, exposure device, and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further quicken image processing effectively, while coping flexibly with various high resolutions. <P>SOLUTION: An exposure controller includes: the first head side communication module 36a, as the first data input part to which the first image data is input; the second head side communication module 36b, as the second data input part to which the second image data is input; the third head side communication module 36c, as the third data input part to which the third image data is input; the fourth head side communication module 36d, as the fourth data input part to which the fourth image data is input; color developing parts 36e<SB>1</SB>, 36e<SB>2</SB>, 36e<SB>3</SB>, 36e<SB>4</SB>for color-developing the input image data; and an output part for outputting the color-developed input image data to exposure head parts 12Y, 12M, 12C, 12K. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technical field of an exposure control apparatus, an exposure apparatus, and an image forming apparatus that control an exposure apparatus that forms an electrostatic latent image on a latent image carrier with a line head having aligned light emitting elements.

2. Description of the Related Art Conventionally, as an image forming apparatus such as a printer, an image forming apparatus that forms an electrostatic latent image on a photosensitive member that is a latent image carrier using a line head having light emitting elements such as aligned organic EL elements is known ( For example, see Patent Document 1). In the image forming apparatus described in Patent Document 1, image data is included in an image formation command and image processing is performed by an image processing controller to form video data. The head controller controls the lighting of the light emitting elements of the line head based on the video data, thereby forming an electrostatic latent image on the latent image carrier.
JP 2008-137237 A.

  By the way, in an image forming apparatus using a line head, in recent years, higher speed and higher resolution are increasingly demanded. For this reason, high-speed processing is also required in image processing. However, the amount of image processing data associated with higher resolution and the like is increasing, which is an impediment to increasing the speed of image processing. In addition, the image forming apparatus is also required to have versatility so as to flexibly cope with various high resolutions.

  However, the image forming apparatus described in Patent Document 1 does not have versatility, and it is difficult to flexibly cope with various high resolutions. In addition, since data is communicated on a one-to-one basis between the image processing controller and the head controller, it is difficult to further increase the speed of image processing.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an exposure control capable of effectively speeding up image processing while flexibly supporting various high resolutions. An apparatus, an exposure apparatus, and an image forming apparatus are provided.

  In order to solve the above-described problems, an exposure control apparatus, an exposure apparatus, and an image forming apparatus according to the present invention include a first data input unit, a second data input unit, and a color development unit. Thereby, the exposure control apparatus can perform exposure control dispersion processing in color development on the divided image data obtained by dividing the image data. Furthermore, by providing the third data input unit or the fourth data input unit, the exposure control apparatus can perform exposure control distributed processing in color development for more divided image data.

  Therefore, according to the exposure control apparatus, the exposure apparatus, and the image forming apparatus according to the present invention, it is possible to perform image processing of high-resolution and large-capacity image data even more rapidly. In particular, the exposure control apparatus of the present invention can realize real-time image processing for a high-speed print engine. Therefore, in the exposure apparatus and the image forming apparatus using the exposure control apparatus of the present invention, it is possible to effectively increase the speed of image processing while flexibly supporting various high resolutions required for the image forming apparatus. Is possible.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram schematically and partially showing an example of an embodiment of an image forming apparatus according to the present invention.
As shown in FIG. 1, the image forming apparatus 1 of this example includes a housing body 2. In the housing body 2, an image forming unit 3, a transfer unit 4, a transfer material supply unit 5 that accommodates a transfer material such as transfer paper, a fixing unit 6, an engine control unit 7, and a paper discharge tray 8 are disposed. ing.

The image forming unit 3 includes a first image forming station 9Y that is a yellow (Y) image forming station, a second image forming station 9M that is a magenta (M) image forming station, and a cyan (C) image forming station. And a fourth image forming station 9K which is a black (K) image forming station. The first to fourth image forming stations 9Y, 9M, 9C, 9K are arranged in tandem in this order. The arrangement order of the first to fourth image forming stations 9Y, 9M, 9C, 9K is arbitrary. Hereinafter, the first to fourth image forming stations 9Y, 9M, 9C, and 9K shown in FIG.

The first to fourth image forming stations 9Y, 9M, 9C, 9K are all configured identically. Therefore, the first image forming station 9Y of yellow (Y) will be described, and detailed descriptions of the second to fourth image forming stations 9M, 9C, 9K of other colors will be omitted. Note that the constituent elements of the second to fourth image forming stations 9M, 9C, and 9K have the same reference numerals and subscripts of M, C, and K as the corresponding constituent elements of the yellow (Y) image forming station 4Y. Attached is shown.

The first image forming station 9Y has a first photoconductor 10Y which is a latent image carrier. The first image forming station 9Y has a first charging unit 11Y, an exposure head unit that is an exposure unit of an image writing unit, a first line head 12Y, and a first photosensitive unit 10Y, around the first photosensitive member 10Y. Development section 13Y and first photoreceptor cleaner 14Y.
The first charging unit 11Y includes a conventionally known first charging roller 15Y. The first charging roller 15Y charges the surface of the first photoconductor 10Y to a preset surface potential.

  As shown in FIG. 2, the first line head 12Y includes a first base substrate 16Y, a first LED array 17Y, a first driver IC 18Y, and a first rod lens array 19Y. The first LED array 17Y includes LED elements that are light emitting elements. In this case, the LED elements are arranged on the first base substrate 16Y along a first direction α (so-called main scanning direction) that is orthogonal or substantially orthogonal to the transfer material conveyance direction (movement direction).

  The first driver IC 18Y is adjacent to the first base substrate 16Y adjacent to the LED element along a second direction β (so-called sub-scanning direction) β that is the same or substantially the same direction as the transfer material conveyance direction. And arranged along the first direction α. At this time, a preset number of LED elements are connected to one first driver IC 18Y. Accordingly, one first driver IC 18Y drives the connected LED element. In that case, when a video signal is given from the head controller 36 described later, the LED element emits light by driving the first driver IC 18Y based on the video signal.

Furthermore, the first rod lens array 19Y has a first gradient index rod lens 20Y. The first gradient index rod lenses 20Y are arranged in a zigzag pattern in two rows along the first direction α, and are arranged facing the LED elements. The first gradient index rod lens 20Y optically forms an image of the light from the LED element to expose the first photoconductor 10Y, and a yellow (Y) static light is applied to the first photoconductor 10Y. An electrostatic latent image is formed. The first gradient index rod lens 20Y is not limited to two rows, and can be arbitrarily arranged in three or more rows.

The first developing unit 13Y has a first developing roller 21Y. The first developing roller 21Y supplies yellow (Y) toner to the first photoconductor 10Y. With this toner, the electrostatic latent image on the first photoconductor 10Y is developed, and a yellow (Y) toner image is formed on the first photoconductor 10Y.
The first photoconductor cleaner 14Y cleans the first photoconductor 10Y to which the toner image is transferred.

  As shown in FIG. 1, the transfer unit 4 includes a yellow (Y) first transfer unit 22Y, a magenta (M) second transfer unit 22M, a cyan (C) third transfer unit 22C, and a black ( B) a fourth transfer portion 22K, an endless transfer belt 23 as a transfer medium, a fifth transfer portion 24, and a transfer belt cleaner 25.

The first transfer portion 22Y has a first transfer roller 26Y. The second transfer portion 22M has a second transfer roller 26M. Further, the third transfer portion 22C has a third transfer roller 26C. Further, the fourth transfer portion 22K has a fourth transfer roller 26K. The first transfer roller to the fourth transfer rollers 26Y, 26M, 26C, and 26K press the transfer belt 23 to the corresponding first to fourth photoconductors 10Y, 10M, 10C, and 10K and The toner images of the first to fourth photoreceptors 10Y, 10M, 10C, and 10K are transferred to the transfer belt 23 by the transfer bias or the fourth transfer bias.

The transfer belt 23 is stretched between a driving roller 27 and a driven roller 28 and is rotated by the driving roller 27 in the arrow γ direction.
The fifth transfer unit 24 has a fifth transfer roller 29. The fifth transfer roller 29 brings the transfer material into pressure contact with the transfer belt 23 and transfers the toner image on the transfer belt 23 to the transfer material with a fifth transfer bias.
The transfer belt cleaner 25 cleans the transfer belt to which the toner image is transferred.

  The transfer material supply unit 5 includes a transfer material storage unit 5 a that stores a transfer material such as transfer paper, and a transfer material supply unit 5 b that supplies the transfer material from the transfer material storage unit 5 a to the fifth transfer unit 24. is doing. The transfer material supply unit 5 supplies transfer materials one by one from the transfer material storage unit 5a to the fifth transfer unit 24 during image formation.

  The fixing unit 6 includes a heating roller 30 and a pressure belt 31. The pressure belt 31 presses the transfer material on which the toner image is transferred by the fifth transfer unit 24 to the heating roller 30. The heating roller 30 heats the toner image transfer surface of the transfer material. As a result, the toner image is fixed on the transfer material, and an image is formed on the transfer material.

The image forming unit 3, the transfer unit 4, the transfer material supply unit 5, and the fixing unit 6 constitute an engine unit 32 of the image forming apparatus 1.
The engine control unit 7 controls the engine unit 32. As shown in FIG. 3, the engine control unit 7 includes a power circuit board (not shown), a main controller 33, an engine controller 34, and a head controller 36 that is an exposure control device.

  When an image formation command is given from an external device (not shown) such as a host computer, the main controller 33 sends a control signal for starting the engine unit 32 to the engine controller 34 via a UART (general purpose asynchronous transmission / reception) communication line. Send.

When the engine controller 34 receives a control signal from the main controller 33, the engine controller 34 starts initialization and warm-up of the engine unit 32. When initialization and warm-up are completed and the image forming operation is ready, the engine controller 34 outputs a synchronization signal that triggers the start of the image forming operation to the head controller 36 via the UART communication line. To do. Further, in the communication between the engine controller 34 and the head controller 36, in addition to the transmission of the synchronization signal, the line heads 11Y, 11M, 11C, 11K
(Transmission and reception of signals of these control parameters is the same as that of the image forming apparatus described in Patent Document 1 described above, and therefore, details thereof will be described.) Will be omitted).

Further, the main controller 33 includes an image forming unit 33a, a first image processing controller 33b, a second image processing controller 33c, a third image processing controller 33d, and a fourth image processing controller 33e.
When the image forming command is given, the image forming unit 33a divides the image data included in the image forming command into an arbitrary number of divided data. The divided data is output to the first image processing controller to the fourth image processing controllers 33b, 33c, 33d, and 33e via the first lane to the fourth lanes 35a, 35b, 35c, and 35d.

The divided data is configured, for example, as band data obtained by dividing image data of one page into two or more arbitrary numbers using several lines (rows) as one band data. Alternatively, the divided data is configured, for example, as page data obtained by dividing image data of several pages into two or more arbitrary numbers using one page as one page data. The divided image data is image data in an interleave format. This interleaved image data is composed of RGB (full color image) data of red (R), green (G), and blue (B). The divided image data is composed of several pixels of data per line. Furthermore, one page of image data is divided into several lines in the second direction (sub-scanning direction) and configured as band data, or several pages of image data are divided into one page as page data. Composed. The image forming unit 33a attaches an address to the head of these divided data, and passes through the first lane through the fourth lane 35a, 35b, 35c, 35d, through the first image processing controller through the fourth image processing controller 33b, Of 33c, 33d, and 33e, it outputs to the image processing controller corresponding to the address.

The first image processing controller 33b includes a first image processing unit 33b ₁ and a first image processing side module 33b ₂ . The second image processing controller 33c includes a second image processing unit 33c ₁ and a second image processing side module 33c ₂ . Further, the third image processing controller 33d has a third image processing unit 33d ₁ and a third image processing side module 33d ₂ . Further, the fourth image processing controller 33e has a fourth image processing unit 33e ₁ and a fourth image processing side module 33e ₂ .

When the divided data is input from the image forming unit 33a to the first image processing unit 33b ₁ , the first image processing unit 33b ₁ performs image processing on the supplied divided data, and the divided data RGB video data (Video Data) is generated. Similarly, the second image processing unit 33c _{1 to} the fourth image processing unit 33e ₁ also perform image processing on the supplied divided data and generate video data (Video Data) of RGB images related to the divided data. To do.

As described above, in the image forming apparatus 1 of this example, the four first image processing units to the fourth image processing units 33b, 33c, 33d, and 33e are arranged, so that image data to be printed is arranged. Are divided into a number equal to or greater than the number of image processing units, and these divided image data are subjected to image processing by being distributed in parallel in each image processing unit.

  The head controller 36 includes a first head side module 36a that is a first data input unit, a second head side module 36b that is a second data input unit, and a third head side that is a third data input unit. It has a module 36c and a fourth head side module 36d which is a fourth data input section. The head controller 36 also includes a head control module 36e and a page memory 36f. The page memory 36f can be provided externally to the head controller 36.

The first image processing side module 33b ₂ and the first head side module 36a can communicate bidirectionally. Then, the first head-side communication module 36a toward the first image processing communication module 33b _2, the video data for one line of the page request signal Preq and the image data indicating the top of the image data of one page The requested line request signal Lreq is transmitted.

Then, the video data of the divided data subjected to the image processing by the first image processing unit 33b ₁ is the first.
Are output from the image processing side communication module 33b ₂ to the first head side communication module 36a. That is, the first head side module 36a outputs the page request signal Preq to the first image processing side communication module 33b ₂ and then outputs the line request signal Lreq one line at a time from the head portion of the band data. Video data is sequentially input via the _first image processing unit 33b ₁ .

Similarly, the second head side module 36b to the fourth head side module 36d receive the band data image processed by the second image processing unit to the fourth image processing unit 33c ₁ , 33d ₁ , 33e ₁ . Video data for each line from the head is sequentially input via the second image processing side communication module to the fourth image processing side communication module 33c ₂ , 33d ₂ , 33e ₂ .

The head control module 36e includes a first color developing unit 36e ₁ , a second color developing unit 36e ₂ , a third color developing unit 36e ₃ , a fourth color developing unit 36e ₄ , and a first rearranging unit 36e _5. , A second rearrangement unit 36e ₆ , a third rearrangement unit 36e ₇ , and a fourth rearrangement unit 36e ₈ .

As shown in FIG. 4, the first to fourth color development units 36e ₁ , 36e ₂ , 36e ₃ , 36e ₄ are composed of a first FIFO buffer to a fourth FIFO buffer FIFO-1, FIFO- 2, FIFO-3, FIFO-4.
The first color developing section 36e ₁ in the first lane is the first head side communication module 36a.
When RGB image data is supplied from, the RGB image data is converted into 4 pixels of yellow (Y), magenta (M), cyan (C), and black (K) as shown in FIG. Color development is performed on two toner colors to form interleaved divided image data. Similarly, the second color development unit to the fourth color development unit 36e ₂ , 36e ₃ , 36e ₄ in the second lane to the fourth lane are connected to the second head side communication module 36b to the fourth head side communication. When RGB image data is supplied from the module 36d, the RGB image data is developed into four toner colors of yellow (Y), magenta (M), cyan (C), and black (K) for each pixel, and interleaved. Format divided image data.

In the first lane, the interleaved divided image data is stored in the first FIFO buffer FIFO-1 via the first head side communication module 36a. The divided image data stored in the first FIFO buffer FIFO-1 is color-coded as shown in FIG. Also in the second lane to the fourth lane, the other divided image data in the interleaved format is transferred from the second head side communication module to the fourth head side communication module 36b, 3
The data is stored in the second FIFO buffer to the fourth FIFO buffer FIFO-2, FIFO-3, and FIFO-4 via 6c and 36d. 2nd FIFO buffer to 4th FIFO buffer FIFO-2,
The divided image data stored in FIFO-3 and FIFO-4 are color-coded.

As shown in FIG. 4, the first to fourth sorting units 36e, 36e ₆ , 36e ₇ , 36e ₈ include a yellow (Y) Y line buffer 36e ₉ and a magenta (M) M line. It has a buffer 36e ₁₀ , a cyan (C) C line buffer 36e ₁₁ , and a black (K) K line buffer 36e ₁₂ . The page memory 36f includes a yellow page data memory unit 36f ₁ , a magenta page data memory unit 36f ₂ , a cyan page data memory unit 36f ₃ , and a black page data memory unit 36f ₄ .

1st FIFO buffer to 4th FIFO buffer FIFO-1, FIFO-2, FIFO-3, FIFO-4
The divided image data that have been color-coded are sequentially distributed and stored in the Y line buffer 36e ₉ , the M line buffer 36e ₁₀ , the C line buffer 36e ₁₁ , and the K line buffer 36e ₁₂ .

When the data of the yellow one line in the Y line buffer 36e ₉ (Y) is accumulated, the line data is stored is transferred to the yellow pages data memory section 36f ₁ of the page memory 36f. Similarly, an M line buffer or a K line buffer 36e ₁₀ ,
When magenta (M) data, cyan (C) data, and black (K) data for one line are accumulated in 36e ₁₁ and 36e ₁₂ , these line data are stored in the magenta page data memory unit 36f of the page memory 36f. _2. Transferred to and stored in the cyan page data memory unit 36f ₃ and the black page data memory unit 36f ₄ .

At this time, when the line data is transferred from the line buffer to the page data memory unit, the line data is rearranged by the rearrangement unit to be the line data of each color. The line data of each color after the rearrangement is transferred to the corresponding memory address of each page data memory unit and stored. Then, the head control module 36e retrieves the line data of each color from the page memory 36f as required, and outputs it to the first line head to the fourth line heads 12Y, 12M, 12C, and 12K which are exposure head units of the corresponding colors. To do. As a result, the first to fourth line heads 12Y, 12M, 12C, and 12K cause the first to fourth photoreceptors 10Y, 10M, 10C, and 10K to have different colors according to the supplied line data. Write the image.

The flow of the above image forming process will be described. FIG. 6 is a diagram showing this flow.
As shown in FIG. 6, when image formation is started, image data is first generated by the image forming unit 33a in step S1. In step S2, the image forming unit 33a divides the image data into band data or page data to form divided data. Next, in step S3, one divided data is converted into the first image processing unit 33b ₁ by the image forming unit 33a.
It is determined whether or not the process can be completed. When division data is determined to be processed by the first image processing section 33b _1, image processing is performed in the first image processing section 33b ₁ relative to the divided data in step S4. The image-processed divided data is developed into a toner color and transferred to the first FIFO buffer FIFO-1 through the first lane in step S5. Next, in step S6, the divided data is divided by the first FIFO buffer FIFO-1 for each color Y, M, C, K plane, and the line buffers 36e ₉ , 36e ₁₀ , 36e ₁₁ , 36e ₁₂ for each color are obtained. Sent. Next, sorting of plane data is performed by first sorting section 36e ₅ in the line buffers _{36e 9, 36e 10, 36e 11} , 36e 12 at step S7. In step S8, the rearranged plane data (line data) is transferred to the page memory 36f and stored in each page data memory unit of the corresponding memory address. Thereafter, although not shown in the flow, as described above, the head control module 36e extracts the line data of each color from the page memory 36f as required, and the first line head to the fourth line heads 12Y, 1
Images of the respective colors are written on the first to fourth photoconductors 10Y, 10M, 10C, and 10K according to the line data taken out of 2M, 12C, and 12K. Thus, the image formation of this image data is completed.

Further, when the divided data in step S3 it is determined that can not be processed by the first image processing section 33b _1, divided data in step S9 whether can be processed by the second image processing section 33c ₁ is determined. When division data is determined to be processed by the second image processor 33c _1, the image processing is performed in the image processing unit 33c ₁ with respect to the divided data second in step S10. The divided data subjected to the image processing is transferred to the second FIFO buffer FIFO-2 through the second lane in step S11. Next, in step S6, the divided data is divided by the second FIFO buffer FIFO-2 for each color Y, M, C, K plane, and is stored in the line buffers 36e ₉ , 36e ₁₀ , 36e ₁₁ , 36e ₁₂ for each color. Sent. Next, in step S7, each line buffer 36e ₉ , 36 is displayed.
Rearrangement processing of plane data is performed at e ₁₀ , 36 e ₁₁ , and 36 e ₁₂ . In step S8, the rearranged plane data is transferred to the page memory 36f and stored in each page data memory unit of the corresponding memory address. Thereafter, in the same manner as described above, the first to fourth photoreceptors 10Y, 10M, and 10C according to the line data taken out of the first to fourth line heads 12Y, 12M, 12C, and 12K. , 10K image of each color is written. Thus, the image formation of this image data is completed.

Further, when the divided data in step S9 it is determined that can not be processed by the second image processor 33c _1, the divided data in step S12 whether can be processed by the third image processing unit 33d ₁ is determined. When division data is determined to be processed by the third image processing unit 33d _1, the image processing is performed in the third image processing unit 33d ₁ for this divided data in step S13.
The divided data subjected to the image processing is transferred to the third FIFO buffer FIFO-3 through the third lane in step S14. Then, the divided data in step S6 is divided by the third FIFO buffer FIFO-3 colors Y, M, C, for each plane K, for each color line buffers 36e _9, 36
sent to _{e 10, 36e 11, 36e 12} . Next, in step S7, plane data rearrangement processing is performed in each line buffer 36e ₉ , 36e ₁₀ , 36e ₁₁ , 36e ₁₂ . In step S8, the rearranged plane data is transferred to the page memory 36f and stored in each page data memory unit of the corresponding memory address. Thereafter, in the same manner as described above, the first to fourth photoreceptors 10Y, 10M, and 10C according to the line data taken out of the first to fourth line heads 12Y, 12M, 12C, and 12K. , 10K image of each color is written. Thus, the image formation of this image data is completed.

Further, when the divided data in step S12 is determined not to be data to be processed by the third image processing unit 33d _1, whether the divided data in step S15 is data to be processed by the fourth image processing section 33e ₁ Is judged. When division data is determined to be data to be processed by the fourth image processing unit 33e _1, the image processing is performed in the fourth image processing unit 33e ₁ for this divided data in step S16. The divided data subjected to the image processing is transferred to the fourth FIFO buffer FIFO-4 through the fourth lane in step S17. Next, in step S6, the divided data is divided for each color Y, M, C, K plane by the fourth FIFO buffer FIFO-4, and is divided into line buffers 36e ₉ , 36e ₁₀ , 36e ₁₁ , 36e ₁₂ for each color. Sent. Next, in step S7, plane data rearrangement processing is performed in each line buffer 36e ₉ , 36e ₁₀ , 36e ₁₁ , 36e ₁₂ . In step S8, the rearranged plane data is transferred to the page memory 36f and stored in each page data memory unit of the corresponding memory address. Thereafter, in the same manner as described above, the first to fourth photoreceptors 1 to 4 according to the line data taken out of the first to fourth line heads 12Y, 12M, 12C, and 12K.
Each color image is written in 0Y, 10M, 10C, and 10K. Thus, the image formation of this image data is completed.

Further, when the divided data in the step S15 is determined to not be processed by the fourth image processing unit 33e _1, returns to step S3 again, whether the image processing unit capable of processing does not exist, repeated confirmation to be processed.

As described above, the head controller 36 of this example includes the four first data input units to the fourth data input unit, the first head side communication module to the fourth head side communication modules 36a, 36b, 36c, 36d. Further, the head controller 36 has a first
The color development unit or the fourth color development unit 36e ₁ , 36e ₂ , 36e ₃ , 36e ₄ and the first rearrangement unit through the fourth rearrangement unit 36e ₅ , 36e ₆ , 36e ₇ , 36e ₈ are provided.

  As a result, the head controller 36 can perform image processing dispersion processing on the divided image data obtained by dividing the image data. In this manner, according to the head controller 36 of this example, it is possible to execute image processing of high-resolution and large-capacity image data even more quickly. In particular, the head controller 36 of this example can realize real-time image processing for a high-speed print engine. Therefore, in the image forming apparatus 1 using the head controller 36, it is possible to effectively increase the speed of image processing while flexibly supporting various high resolutions required for the image forming apparatus 1. Become.

Note that other configurations and other image operations in the image forming apparatus 1 of this example are substantially the same as those of the image forming apparatus described in Patent Document 1, and thus the description thereof is omitted.
The present invention is not limited to the above-described examples, and various design changes can be made within the scope of the matters described in the claims.

1 is a diagram schematically and partially showing an example of an embodiment of an image forming apparatus according to the present invention. It is a fragmentary perspective view of the line head of the example shown in FIG. It is a block diagram of the engine control part and engine part of the example shown in FIG. It is a block diagram explaining the image data processing in a head control module. It is a figure which shows an example of division | segmentation image data. It is a figure which shows an example of the flow of the image formation based on image data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 3 ... Image forming unit, 7 ... Engine control part, 10Y ... 1st photoreceptor, 10M ... 2nd photoreceptor, 10C ... 3rd photoreceptor, 10K ... 4th photoreceptor, 12Y: First line head, 12M: Second line head, 12C: Third line head, 12K: Fourth line head, 32: Engine unit, 33: Main controller, 33b: First image processing controller 33b ₁ ... First image processing unit, 33c... Second image processing controller, 33c ₁ ... Second image processing unit, 33d ₁ ... Third image processing unit, 33d. ... 4th image processing controller, 33e ₁ ... 4th image processing part, 3
DESCRIPTION OF SYMBOLS 4 ... Engine controller 36 ... Head controller 36a ... 1st head side module 36b ... 2nd head side module 36c ... 3rd head side module 36d ... 4th head side module 36e ... Head control Module, 36e ₁ ... 1st color development part, 36e ₂ ... 2nd color development part, 36e ₃ ... 3rd color development part, 36e ₄ ... 4th color development part,
36e ₅ ... 1st rearrangement part, 36e ₆ ... 2nd rearrangement part, 36e ₇ ... 3rd rearrangement part, 36e ₈ ... 4th rearrangement part, 36e ₉ ... Y line buffer, 36e ₁₀ ... M line buffer, 36e ₁₁ ... C line buffer, 36e ₁₂ ... K line buffer, 36f ... page memory, 36f ₁ ... yellow page data memory part, 36f ₂ ... magenta page data memory part, 36f ₃ ... cyan page data memory part, 36f ₄ ... black page data memory section

Claims (8)

A first data input unit to which first image data is input;
A second data input unit to which second image data is input;
A color development unit for color-expanding the input first image data;
An output unit for outputting the color-developed first image data to an exposure head unit;
An exposure control apparatus comprising:   The exposure control apparatus according to claim 1, further comprising a second color development unit that develops the color of the input second image data. A third data input unit to which third image data is input;
The exposure control apparatus according to claim 2, further comprising: a third color development unit that performs color development on the input third image data. A fourth data input unit to which the fourth image data is input;
The exposure control apparatus according to claim 3, further comprising: a fourth color development unit that performs color development on the input fourth image data.   The exposure control apparatus according to claim 1, further comprising a rearrangement unit that rearranges the image data color-developed by the color development unit.   The exposure control apparatus according to claim 5, further comprising a memory unit that stores the image data rearranged by the rearrangement unit. An exposure head unit for forming a latent image on the latent image carrier;
An image processing controller for performing image processing;
A first data input unit to which the first image data processed by the image processing controller is input; a second data input unit to which the second image data processed by the image processing controller is input; An exposure apparatus comprising: a color development unit that performs color development on the input first image data; and an output unit that outputs the color-developed first image data to an exposure head unit. A latent image carrier on which an electrostatic latent image is formed;
An exposure head unit for forming an electrostatic latent image based on image data on the latent image carrier;
An image processing controller for image processing the image data;
A first data input unit to which the first image data processed by the image processing controller is input; a second data input unit to which the second image data processed by the image processing controller is input; An image forming apparatus comprising: a color developing unit that performs color development on the input first image data; and an output unit that outputs the color-developed first image data to an exposure head unit.

Images