JP2607621B2 - Facsimile machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a facsimile apparatus capable of selectively receiving at least two communication standard modes.

2. Description of the Related Art Conventionally, a facsimile apparatus capable of selectively receiving data in at least two communication standard modes (for example, G3 standard and G4 standard communication modes) has only one type of recording density of a recording apparatus. Or, only a recording device of either recording density for G4 standard was provided.

[Problems to be Solved by the Invention] For this reason, in a facsimile apparatus provided with a recording device having a recording density for G4, when data is received from a telephone line network by a G3 standard communication control procedure, the received image is In order to print the image, it was necessary to operate the received image data on the control device side to perform density conversion from G3 to G4 and then send it to a recording device for printing out.

On the other hand, in a facsimile apparatus equipped with a recording device having a recording density for G3, when data is received from a circuit network according to a G4 standard communication control procedure, the data is received by the control device in order to print the received image. Manipulate image data
After performing density conversion from G4 to G3, it had to be sent to a recording device and printed out.

Generally, when receiving in G4 standard, received data is 20
Resolution of 0 to 400 pixels / 25.4mm, 1 for G3 standard
Data is transmitted at a resolution of 728 pixels / 215 mm, and the scanning line density is 3.85 lines / mm (standard) and 7.7 lines / mm.

Therefore, 8 x 7.7 (8 x 3.85) / mm 200 x 200 (40
(0 × 400) In order to convert the PPI or the like, dots must be thinned out or inserted periodically, and as a result of these processes, drawbacks such as lines in the image may occur.

In addition, if the recording device is made exchangeable and recording is performed using a recording device corresponding to each recording density, complicated resolution conversion processing becomes unnecessary, but in a facsimile device for both G3 / G4, Until the call arrives, it is not possible to know which mode the image data will be received, so replacing the recording device after receiving the image data is not only very troublesome, but also requires the operator to be present at the location. And it is not efficient.

[Means for Solving the Problems] The present invention has been made for the purpose of solving the above problems, and has, for example, the following configuration as one means for solving the above problems.

That is, in a facsimile apparatus that records an image based on scanning of laser light and can communicate in G3 mode and G4 mode, a receiving unit that receives image data, and whether the image data received by the receiving unit is in G3 mode or G4 Determining means for determining whether or not the image data is in a mode; selecting means for selecting a recording density of an image representing image data received by the receiving means based on a determination result of the determining means; and selecting the recording density according to the recording density selected by the selecting means. Recording control means for variably controlling the scanning speed of the laser beam to record an image.

[Operation] In the above configuration, it is determined whether the received image data is based on the G3 mode or the G4 mode, a recording density is selected based on the determination result, and the scanning speed of the laser beam is changed according to the recording density. Images can be recorded by variably controlling.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment according to the present invention.
In the figure, reference numeral 1 denotes a control unit for controlling the entire embodiment according to a program stored in the ROM 8, for example, a program shown in FIG. A recording unit for printing out recording data from the storage unit 3, a storage unit for storing received data from the network and read data from the reading unit 7, and a known compression unit 4 under control of the control unit 1. A compression / decompression unit that performs decompression processing. 5 is a G3 communication control unit that is connected to the G3 network 10 and performs facsimile communication in accordance with a known G3 communication standard;
Reference numeral 6 denotes a G4 communication control unit which is connected to the G4 line network 20 and performs facsimile communication in accordance with a known G4 communication standard. The reading unit 7 reads data from the reading unit 7 and temporarily stores the data in the storage unit 3, and then sends the data to a network or prints out the data from the recording unit 2. Reference numeral 8 stores parameters and the like used in the present embodiment in addition to the above-described program.
ROM.

Details of the recording density conversion of the recording density conversion unit 2a in the recording unit 2 will be described below with reference to FIG.

In FIG. 2, reference numeral 21 denotes a recording control unit which receives a recording density designation from the control unit 1 and reads out storage data from the storage unit 3 at a timing according to the recording density designation, and 22 emits a laser beam according to the recording data. A light emitting unit 23 for controlling light emission / non-light emission controls a polygon mirror driving unit 24 according to a recording density designation from a recording control unit 21, controls a rotation speed of the polygon mirror, and scans a photosensitive member at an output unit 2b. Is a polygon mirror driving unit that rotates the polygon mirror at a speed according to the control of the scanning speed control unit 23. Note that a mechanism for forming an electrostatic latent image of the electrophotographic method in the output unit and a mechanism for visualizing and fixing the electrostatic latent image are known, and thus detailed description thereof will be omitted.

In the above configuration, the rotation speed of the photoconductor (photosensitive drum) of the recording unit 2b is generally constant. The printing speed is proportional to the rotation speed of the photoconductor.

 The vertical and horizontal resolutions are as follows.

Number of vertical scanning lines; Nv = (S / T) Number of horizontal dots; Nh = (T / t) where S; Printing time of one page T; Rotation time per one side of hexahedral mirror (polygon mirror) t; Print data signal (LDRV) period To change the above resolution, T and t may be changed. In particular, when the rotation speed of the hexahedral mirror is changed, the intervals between the dots uniformly change, so that the deterioration of the printed image is small.

Therefore, when printing out the data received from the G3 line, determine the photoconductor rotation speed (printing time per page) according to the G3 standard and determine the rotation time per hexahedral mirror (polygon mirror). I do. Then, the output unit 2b may be controlled according to the determined rotation speed or the like.

Similarly, when printing out received data from the G4 line, determine the photoconductor rotation speed (printing time for one page) according to the G4 standard, and determine the rotation time per one surface of a hexahedral mirror (polygon mirror). I do. Then, the output unit 2b may be controlled according to the determined rotation speed or the like.

The reception control of the present embodiment having the above configuration will be described below with reference to the flowchart of FIG.

When a call is made to the G3 communication control unit 5 or the G4 communication control unit 6, the control unit 1 is notified of the occurrence. When the control unit 1 detects the occurrence of the call, the process proceeds to the process of FIG. 3, and in step S100, the call is detected by the G3 communication control unit 5, or
It is determined whether the G4 communication control unit 6 detects a call. When a call is received from the G3 communication control unit 5, the process proceeds to step S101, where the G3 communication control unit 5 is activated to receive data from the G3 network 10. At the same time, as shown in step S103, the compression / expansion unit 4 is instructed to expand in the G3 expansion mode. In the next step S105, the decompressed data is stored at a predetermined position in the storage unit 3. In step S106, it is checked whether the reception of one page has been completed. If the reception of one page has not been completed, the process returns to step S100 to continue the reception of one page.

As a result, the subsequently received data from the G3 line network 10 is received by the G3 communication control unit 5, decompressed by the compression / decompression unit 4, and stored in the storage unit 3.

On the other hand, if it is determined in step S100 that the call has been received from the G4 communication control unit 6, the process proceeds to step S102, where the G4 communication control unit 6 is activated to receive data from the G4 line network 20.
At the same time, in step S104, the compression / expansion unit 4 is instructed to expand in the G4 expansion mode. And step S1
Go to 05. This allows the G4 network to be received sequentially
The received data from 20 is received by the G4 communication control unit 6,
The data is decompressed by the compression / decompression unit 4 and stored in the storage unit 3.

In step S106, it is checked whether the reception of one page of data has been completed. If the reception of one page of data has not been completed, the process proceeds to step S107, and if not completed, the process returns to step S100.

In step S107, the data stored in the storage unit 3 is
The control unit 1 checks whether the received data is from the G3 network 10 or the received data from the G4 network 20. If the received data is from the G3 network 10, the control unit 1 stores the received data in the storage unit 2 in step S108. It is designated to print out at a resolution conforming to the G3 standard (at a recording density for G3), and the process proceeds to step S110.

On the other hand, in the case of the received data from the G4 network 20, in step S109, it is specified that the received data stored in the storage unit 2 is to be printed out at a resolution conforming to the G4 standard (at a recording density for G4) and in step S110 Proceed to.

The recording density in this case is, for example, 8 × 3 for G3.
The recording density is 8 × 7.7 / mm for 85 / mm and G4.

In the recording unit 2 receiving the designation of the recording density, the photoconductor rotation speed (printing time of one page) according to each standard as described above.
Is determined, and the rotation time per one surface of the hexahedral mirror (polygon mirror) is determined. Then, the output unit 2b is controlled in accordance with the determined rotation speed and the like, and print processing for one page is executed.

With the above configuration, a special zooming device is conventionally used, for example, when printing 8 × 3.85 / mm image data at the time of reception in the G3 mode with a recording device having only a recording density of 8 × 7.7 / mm. Although it is necessary, the present embodiment does not require these troublesome configurations, and merely controls the operation speed of the mechanical unit at the time of print output of the recording apparatus, and does not cause deterioration of the print image.

400 x 200 x 200 PPI image data when receiving in G4 mode
The same applies to printing with a recording device of x400 PPI.

[Other Embodiments] In the above description, a page printer that stores print data for each page and is capable of printing out each time data for one page is prepared has been assumed. There is no need to wait, and the printout may be performed every time the received data becomes printable.

In the above description, the recording density (and the
Nothing is specified about the number of types (recording density in the G4 standard), but printing can be performed at an arbitrary number of recording densities as long as the recording density can be controlled by the recording density conversion unit 2a of the recording unit 2. In this case as well, it is only necessary to control the above-described rotation speed and the like in accordance with the recording density, and this can be realized with simple control. Also in this case, there is no image deterioration.

As described above, according to the present invention, even when the recording densities of the reception information received from the line network are different, there is no need for troublesome reception information scaling processing and the like, and the output quality of the reception information deteriorates. It is possible to provide a facsimile apparatus capable of printing and outputting with simple control without causing any falsification.

[Effects of the Invention] As described above, according to the present invention, it is determined whether received image data is in the G3 mode or in the G4 mode, and a recording density is selected based on the result of the determination. The image can be recorded by variably controlling the scanning speed of the laser beam, thereby eliminating the need for complicated resolution conversion processing. In addition, the image can be efficiently recorded at a recording density corresponding to each mode. Can be recorded.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention, FIG. 2 is a detailed diagram of a recording density conversion unit in FIG. 1, and FIG. 3 is a reception control flowchart of the present embodiment. In the figure, 1 ... control unit, 2 ... recording unit, 2a ... recording density conversion unit, 2b ... output unit, 3 ... storage unit, 4 ... compression / decompression unit, 5 ... communication control for G3 Section, 6 ... G4 communication control section, 7
... Reading section, 8 ROM, 21 recording control section, 22 light emitting section, 23 scanning speed control section, 24 polygon mirror driving section.

Claims (1)

(57) [Claims] An image is recorded based on scanning of a laser beam.
A facsimile apparatus capable of communicating in a G4 mode and a G4 mode, receiving means for receiving image data; determining means for determining whether the image data received by the receiving means is in the G3 mode or in the G4 mode; and the determining means Selecting means for selecting the recording density of an image representing the image data received by the receiving means based on the determination result of the above, and recording the image by variably controlling the scanning speed of the laser beam according to the recording density selected by the selecting means. A facsimile apparatus comprising: