JPH066532A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To attain high speed reading in the transmission mode and to reduce a copy time in the copy mode by selecting a period of a drive clock in response to the operating mode when a signal charge of an optional picture element of an image sensor is outputted so as to drive an image sensor. CONSTITUTION:All of 256 picture elements of a line sensor 24 of a scanner section are valid picture elements in the transmission mode operation, and a reading by 16mm width is attained. Since the moving distance of a subscanning carriage 15 in the Y direction is 16mm feeding each, when an original of A4 size is read, the switching of a read section 11 in the X direction is implemented by 296/16 19 times. Among 256 picture elements of the line sensor 24, 128 picture elements are valid picture elements in the copy mode original copying, the reading by a width of 8mm is implemented and a printer section prints out a picture with a width of 8mm in real time. Since the moving distance of the carriage 15 in the Y direction is fed by 8mm each per one movement in the X direction, when an original of size A4 is read, the scanning of the read section 11 in the X direction is implemented by 296/8 40 times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a printer section having an ink jet printer configuration.
The present invention relates to a facsimile device having a copy mode.

[0002]

2. Description of the Related Art The majority of printers of conventional facsimile machines are equipped with a thermal printer using a thermal head. However, in recent years, an inkjet printer (hereinafter referred to as an inkjet printer) has been developed, and this inkjet printer is being adopted for a facsimile apparatus. An inkjet printer prints a desired printing range by ejecting ink from a plurality of ink ejection ports arranged on a straight line and continuously printing a band-shaped image. It has already been widely adopted for printers connected to word processors (word processors) or personal computers (personal computers) because it has many advantages such as small size and low running cost.

By the way, the development level of the ink jet head is still low at present, and the number of ink ejection ports that can be arranged in the head is several tens to hundreds and tens, so that, for example, the number of ink ejection ports is 128. In this case, a method is generally used in which the number of pixels of the line image sensor on the scanner (original reading device) side is adjusted to 128, and scanning (image scanning) or printing operation is performed in real time on the transmitting side and the receiving side. . With such a configuration, even when a document is copied in the copy mode, the document can be printed and printed at the same time, so that the memory configuration for temporarily storing the image data for image processing can be minimized. There are advantages that the configuration is simple and the cost can be reduced.

[0004]

However, in recent years, the development of high-resolution facsimile machines and color facsimile machines has progressed, and along with this, compression algorithms have been developed for compressing enormous image data with high efficiency. Although the compression algorithm adopted on the transmission side of these facsimile machines can be expected to improve the compression efficiency, it takes time to compress the image data, so the image data of the original document that was once read by the scanner unit is stored in memory. There is no choice but to take a method of storing the data, compressing the data while reading out the data little by little from the memory, and transmitting the data at once when the compression processing is completed.

In such a facsimile machine,
There is no particular problem with document copying in the copy mode, but the number of ink ejection ports in the inkjet printer is
Since the number of sensor pixels in the scanner unit is limited, the original disadvantage that the reading speed is relatively long during the scanning of an original during image transmission is exposed.

In view of the above points, an object of the present invention is to provide a facsimile apparatus capable of high-speed reading in the transmission mode and shortening the copying time in the copying mode.

[0007]

In order to achieve the above object, the present invention provides a scanner unit using an image sensor having a reading width longer than the printing width of the printer unit and a case of copying an original in a copy mode. The number of effective pixels of the image sensor is reduced to read an original according to the print width of the printer unit, and when the original image is transmitted in the transmission mode, the image sensor used in the copy mode is used. Read control means for increasing the number of effective pixels to read a document.

Further, as one form of the present invention, the reading control means increases the driving speed of the image sensor when the invalid pixel data is output from the image sensor at the time of reading the original in the copy mode. Is characterized by.

According to another aspect of the present invention, a first-in first-out line buffer is connected to a stage subsequent to the image sensor, and a read clock of the line buffer and a head drive clock of the printer unit are synchronized. Is characterized by.

As another aspect of the present invention, a line sensor having a BASIS structure is used as the image sensor.

[0011]

According to the present invention, an image sensor having a larger number of pixels than the number of ink ejection openings in an ink jet printer section is used. All the effective pixels of the image sensor are used to scan the original when scanning the original in the transmission mode, and when the original is copied in the copy mode, the pixels of the image sensor are set to the effective pixels as many as the number of ink ejection ports of the inkjet printer. Use as and read.

Further, at the time of copying a document, when invalid image data is output from the image sensor, the driving speed of the image sensor is increased to shorten the copying time.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows the external appearance of the scanner section (original reading / scanning section) of the facsimile apparatus embodying the present invention. The reading unit 11 is attached to a part of the main scanning belt 12, and the main scanning motor 13 rotates to rotate the main scanning guide 1.
In accordance with No. 4, it moves in the direction of arrow X in the figure to read in the main scanning direction.

The internal structure of the reading unit 11 is shown in FIG. Here, 22 is a light source for illuminating the original document 26, 23 is a selfoc lens array for forming an image (light image) of the original document 26 illuminated by the light source 22 on the line image sensor 24 at an equal size, and 25 is colorless and transparent. It is a manuscript glass stand. The line image sensor 24 has a photosensor having 16 pixels per mm, and a total of 256 pixels. That is, it is set so that a 16 mm width can be read in the X direction (main scanning direction).

Returning to FIG. 1, the description of the scanner unit will be continued. The sub-scanning carriage 15 is attached to a part of the sub-scanning belt 16, and the sub-scanning motor is rotated to move in the direction of the arrow Y in the drawing in accordance with the sub-scanning guide 17 to execute the sub-scanning movement. is doing.

Next, the printer section will be described. The printer unit of this embodiment is composed of an inkjet printer. 3 and 4 show a configuration example of an inkjet printer suitable as a recording system of a facsimile apparatus to which the present invention is applied. In the figure, reference numeral 120 denotes an ink jet head (recording head) of a type in which ink is ejected onto recording paper by using bubbles generated by thermal energy, 121.
Is a freely attachable inkjet cartridge provided with a tank 110 that is integral with the inkjet head 120 and supplies ink to the inkjet head 120, and IJRA is the main body of the inkjet recording apparatus.

Inkjet cartridge 12 in this example
1 is the ink tank 11 as shown in the perspective view of FIG.
Inkjet head 120 slightly more than the front surface of 0
Has a protruding shape. The inkjet head cartridge 121 includes a carriage 116 mounted on an inkjet recording apparatus main body IJRA described later.
It is a disposable type which is fixedly supported by the carriage 116 and is detachable from the carriage 116.

The ink tank 110 for storing the ink to be supplied to the ink jet head 120 includes an ink absorber, a container for inserting the ink absorber, and a lid member (not shown) for sealing the container. It is composed of. The ink tank 110 is filled with ink, and the ink is sequentially supplied to the inkjet head side according to the ejection of the ink.

The ink jet cartridge 121 configured as described above is detachably mounted on the carriage 116 of the ink jet recording apparatus IJRA described below by a predetermined method, and the carriage 116 and the recording target are input by inputting a predetermined recording signal. A desired recorded image is formed by controlling the relative movement with respect to the member.

FIG. 4 shows an example of an ink jet recording apparatus IJRA having a mechanism for the above processing. In the figure, reference numeral 120 denotes an inkjet head (recording head) of an inkjet head cartridge 121 having an ink ejection port group for ejecting ink so as to face the recording surface of the recording paper fed onto the platen 124. Reference numeral 116 denotes a carriage that holds the recording head 120, and is connected to a part of a driving belt 118 that transmits the driving force of the driving motor 117, and two guide shafts 1 that are arranged in parallel with each other.
By being slidable with 19A and 119B, the reciprocating movement of the recording head 120 over the entire width of the recording paper becomes possible. During this reciprocating movement, the recording head 120 records an image according to the received data on the recording paper. Each time this main scanning is completed, the recording paper is conveyed by a predetermined amount and sub-scanning is performed.

Reference numeral 126 denotes a head recovery device, which is disposed at one end of the movement path of the recording head 120, for example, at a position facing the home position. The head recovery device 126 is operated by the driving force of the motor 122 via the transmission mechanism 123, and the recording head 120 is capped.
In connection with the capping of the recording head 120 by the cap portion 126A of the head recovery device 126, an appropriate suction means (for example, provided in the head recovery device 126,
The ink is absorbed (sucked and recovered) by the suction pump, and the ink is forcibly discharged from the discharge port, thereby performing the discharge recovery process such as removing the thickened ink in the discharge port. Further, the recording head is protected by capping at the end of recording. Such an ejection recovery process is performed when the power is turned on, when the recording head is replaced, or when the recording operation is not performed for a certain period of time.

Reference numeral 131 is a blade as a wiping member which is disposed on the side surface of the head recovery device 126 and is made of silicon rubber. The blade 131 is held by the blade holding member 131A in a cantilever form, and like the head recovery device 126, the motor 122 and the transmission mechanism 123.
The recording head 120 can be engaged with the ejection surface of the recording head 120. As a result, the blade 131 is projected into the movement path of the recording head 120 at an appropriate timing in the recording operation of the recording head 120 or after the ejection recovery process using the head recovery device 126, and the head 120 is ejected.
Condensation, wetting, dust, etc. on the ejection surface of the head 120 are wiped with the moving operation of the head.

The ink jet printer of this embodiment is shown in FIG.
5, the inkjet recording head 120 has 128 ink ejection ports arranged on a straight line, and ejects ink sequentially from the ink ejection ports while moving in the direction of arrow X in FIG. Print. Since the ejection port interval of this inkjet head is 1/16 mm, one ejection port of the inkjet head corresponds to one pixel of the line image sensor 24 of the scanner section, and reading and printing with the same resolution are possible. Since the number of outlets is 128,
Printing with a width of 8 mm is performed in the X direction.

FIG. 6 shows a circuit configuration of an electric system of the scanner section. An image of the original document 26 illuminated by the light source 22 is formed on a line image sensor (hereinafter abbreviated as line sensor) 24, and the image is read by the line sensor 24. The analog image signal output from the line sensor 24 is input to the analog amplifier 41, and the signal-amplified A / D (analog / digital) converter 42 is input to the analog image signal. The image data that has been subjected to the analog-digital conversion processing by the A / D converter 42 is input to the image processing section 43, where it is subjected to image processing such as shading correction and edge enhancement, and sent to a controller section (not shown). .
The controller section controls so that the image data is sent to the transmission line in the transmission mode and to the printer section in the copy mode depending on the operation mode of the facsimile apparatus. An illuminance control circuit 44 controls the light source 22 by setting the optimum illuminance in each of the transmission mode and the copy mode.

The operation of the facsimile apparatus having the above-described structure in the copy mode will be described first. When a document is copied in the copy mode, 128 pixels out of 256 pixels of the line sensor 24 of the scanner section become effective pixels, an 8 mm width reading operation is performed, and an 8 mm width printing is performed in real time by the printer section. . Therefore, since the moving distance of the sub-scanning carriage 15 in FIG. 1 in the Y direction is 8 mm per movement in the X direction, when reading a document of A4 size, the reading unit 11 scans in the X direction. Will be performed 296 / 8≈40 times. FIG. 7 shows the state of the drive clock of the line sensor 24 at this time.

In FIG. 7, a signal φSH is a main scanning synchronizing signal for the line sensor 24, and this signal φSH
Of one cycle, that is, the charge accumulation time Tint
During 1, the 256 photosensors of the line sensor 24 perform photoelectric conversion according to the contrast of the original image. At this time, FIG.
The illuminance control circuit 44 shown in FIG.
1 is set and the light source 22 illuminates the document 26.

At the timing of the main scanning synchronization signal φSH, the charges accumulated by the photosensor are transferred to the 256 analog shift registers (not shown) inside the line sensor 24,
Data transfer of the analog shift register is performed by signals φ1 and φ2 which are drive clocks, and signals φ1 and φ2 are sequentially output from the first pixel of the line sensor 24 as shown in FIG.
Analog image signal by the timing of the image sensor 2
4 to the analog amplifier 41. The period of the drive signals φ1 and φ2 at this time is T1.

Since the effective pixels of the line sensor 24 in the copy mode are from the first pixel to the 128th pixel as described above, the image data after the 129th pixel becomes invalid data. Therefore, since these invalid data must be swept out from the analog shift register in the line sensor 24, it is necessary to continuously supply the signals φ1 and φ2. However, as shown in FIG. 7, the video enable signal V
Since E is inactive from the 129th pixel, the periods of the signals φ1 and φ2 are not limited to T1. Therefore, from the 129th pixel, the signals φ1 and φ2 are controlled so that unnecessary image data is swept out at high speed in the cycle T2.
The relationship between the periods T1 and T2 is, for example, T1 = 4T2.
Therefore, Tint1 = 128T1 + 128T2 = 160
It becomes T1.

Original document 26 read by the line sensor 24
The image is subjected to data processing by the electric circuit of FIG. 6, and the processed data is sent to a controller unit (not shown).
The controller section sends the input processing data to the printer section, and the printer section performs image copying of the original document 26.

Next, the operation in the transmission mode will be described. When the operation in the transmission mode is performed, all 256 pixels of the line sensor 24 of the scanner unit become effective pixels, and the reading operation of 16 mm width is performed. Therefore,
The movement distance of the sub-scanning carriage 15 in the Y direction is 16 mm
When scanning an A4 size document, the scanning of the scanning unit 11 in the X direction is 296/16.
≈ 19 times. The state of the drive clock of the line sensor 24 at this time is shown in FIG.

In FIG. 8, the main scanning synchronizing signal φSH is set to 1
During the time Tint2 corresponding to the cycle, the 256 photosensors of the line sensor 24 perform photoelectric conversion according to the contrast of the original image. At this time, the illuminance control circuit 44 of FIG. 6 sets the illuminance L2 suitable for the transmission mode in the light source 22 and illuminates the document 26 with the light source 22.

As in the copy mode, 256 in the line sensor 24 at the timing of the main scanning synchronizing signal φSH.
The charges accumulated by the photo sensor are transferred to the individual analog shift registers, the data of the analog shift register is transferred by the signals φ1 and φ2, and the timings of φ1 and φ2 are sequentially applied from the first pixel of the line sensor 24 as shown in FIG. Then, the analog image signal is output from the line sensor 24 to the analog amplifier 41. Signals φ1 and φ at this time
The period of 2 is always T1.

At this time, as shown in FIG. 8, the video enable signal VE is active while the data of 256 pixels is output. Therefore, the charge storage time Tint2 is Tint2 = 256T1. However, the amount of light received by any one pixel of the line sensor 24 must be equal due to Tint1 in the copy mode and Tint2 in the transmission mode. That is, from the relationship of light amount = illuminance × time,

[0035]

## EQU1 ## L1 × Tint1 = L2 × Tint2 (1) must be satisfied. As mentioned above

[0036]

## EQU00002 ## Tint1 = 160T1 (2)

[0037]

## EQU00003 ## Since Tint2 = 256T1 (3) can be replaced, the above equations (1), (2),
From (3)

[0038]

## EQU00004 ## L1 = 256 / 160L2 = 1.6L2 (4) is derived. Therefore, in the copy mode, the illuminance control circuit 44 controls the illuminance 1.6 times as high as that in the transmission mode, so that the data output characteristics of the line sensor 24 can be made equal depending on the mode.

Original document 26 read by the line sensor 24
The image information is subjected to data processing by the circuit of FIG. 6, and the processed data is sent to a controller unit (not shown).
The controller unit sends the processing data to be input to a transmission line (not shown) and transmits the image of the original document 26.

(Other Embodiments, Part 1) According to the above-described embodiment of the present invention, in the transmission mode, in the case of reading an A4 size original document having the number of movements in the X direction described in FIG. Since it is possible to shorten the reading time by moving 19 times, the effective pixel of the line sensor having a photosensor of 256 pixels is set to 128 pixels in the copy mode. Therefore, in the control example of the embodiment, the conventional 128 pixels are used.
It takes 1.6 times as long as the time required for copying an original using a line sensor having a pixel photo sensor. The means for solving this problem will be described in the following embodiments.

FIG. 9 shows a circuit configuration of an electric system of another embodiment of the present invention having a configuration for solving the above-mentioned problems in the present invention. The difference from the embodiment of FIG. 6 is that a FIFO 71 is provided between the A / D converter 42 and the image processing circuit 43. The FIFO 71 is a line buffer of the first-in first-out system, can set the periods of the data write clock and the data read clock separately, and performs the operation of outputting the data in the written order. The control of the FIFO 71 will be described with reference to FIG.

In order to simplify the explanation, the timing chart shown in FIG. 10 shows that each block in FIG. 9 has an output delay of 0 and a data sample setup time of 0.
Shall be In the figure, a signal WCL is a data write clock input to the FIFO 71, and is synchronized with the drive signals φ1 and φ2 of the line sensor 24 at the time of outputting an effective pixel. Since the data writing is sequentially performed at the rising timing of the clock WCL, the generation timing of the writing data inside the FIFO 71 is as shown in FIG.

The signal RCL is a read clock input to the FIFO 71. The signal RCL has a storage time Tint
Since 128 clocks are controlled to be generated in one cycle of 3, the originals are copied in the conventional original copy time by synchronizing the signal RCL with the head drive clock of the printer section. Inversion signal bar RSTW,
The inversion signal bar RSTR is a signal for resetting the register of the writing unit inside the FIFO 71 and a signal for resetting the register of the reading unit thereof, and is input to the FIFO 71 at the timing shown in FIG.

In the control described above, the illuminance of the light source 22 is L3. When the relationship between the illuminance L3 and the illuminance L1 in the above-described embodiment is obtained, the cycle of the head drive clock in the printer unit described so far is T1.

[0045]

## EQU00005 ## 128T1 = 128T3 + 128T4 (5) Similar to the example of FIG.

[0046]

## EQU00006 ## If T3 = 4T4 (6), from the above equations (5) and (6)

[0047]

## EQU00007 ## 128T1 = 160T3 (7) is derived. Since the amount of light received by any one pixel of the line sensor 24 must be equal, from the relationship of amount of light = illuminance × time,

[0048]

L3 × Tint3 = L1 × Tint1 (8)

[0049]

Since Tint3 = 128T3 (9), from the above equations (2), (7), (8), and (9),

[0050]

## EQU10 ## The relation L3≈1.56L1 (10) is obtained. That is, if the light amount setting in the copy mode in the above-mentioned conventional example is set to about 1.56 times and set in this embodiment, the original copy can be performed in the same original copy time as the conventional one.

(Other Embodiments, No. 2) The present invention is particularly effective for a device to which a scaling function, especially a reduction function is added. That is, when considering 50% reduction, which is a general setting of maximum reduction rate,
In a device having a conventional configuration including a reading unit having an 8-pixel line sensor and a printer unit having an inkjet head having 128 ejection ports, when performing 50% reduction printing, the reading unit uses all 128 pixels. Image processing is performed on the read image data, and finally 64 pixels are output to the printer unit as valid data. Therefore, in the printer section, it has been necessary to print using only 64 of the 128 ejection openings. On the other hand, according to the present invention, the reading unit has 256
Since the pixel line sensor is used, the effective data output to the printer unit can be 128 pixels even when the 50% reduction processing is performed, and printing is performed using all 128 ejection ports of the printer unit. Because you can
You can expect a significant reduction in printing time.

(Other Embodiments, Part 3) In the above-described embodiments of the present invention, an example using a CCD (charge coupled device) sensor as an image sensor has been described.
The present invention uses a BASIS-structured image sensor, which allows for a simple configuration and control of the device. BA
FIG. 11 shows a configuration example of the image sensor having the SIS structure.
BASIS91 has a 256 pixel photo sensor,
A switch S (S1 to S2) is provided for each photosensor 92 of each pixel.
56) and switches RS (RS1 to RS256) are provided. When the switch S is turned on, the signal charges photoelectrically converted / stored by each photosensor 92 appear at the terminal (OS) 93, and the signal is read.
After the reading of this signal is completed, the switch RS is turned on to reset the signal charge, and the signal charge is accumulated until the next switch S is turned on. 256 switches S and 256 switches R
On / off control of S is performed by a logic circuit (not shown).

FIG. 12 shows the state of the drive clock of the BASIS 91 when an original is copied in the copy mode by the facsimile apparatus using the image sensor having the BASIS structure. In copy mode, 129 pixels ~
Since the image signal of 256 pixels is unnecessary, the switch S129
~ S256 is never turned on, and the switch RS12
Only 9-RS256 is turned on, and 129 pixels-256
The pixel signal charges are being reset. As shown in FIG. 12, the 12th pixel is reset and the 12th pixel is reset.
By resetting the 9th pixel to the 256th pixel, C
The sweep-out time of invalid image data required at the time of copying an original by a device using a CD sensor can be reduced to zero. As a result, according to the present embodiment, further reduction of copying time can be expected.

FIG. 13 shows the state of the drive clock of the BASIS 91 when reading an image in the transmission mode. From this figure, it is understood that in the transmission mode, the control is performed so that all the data of 256 pixels are valid. The illuminance of the light source in the copy mode of this device is L
4. If the illuminance in the transmission mode is L5, it is clear that the relationship between L4 and L5 is 2L4 = L5.

(Others) In particular, the present invention is provided with a means (for example, an electrothermal converter or a laser beam) for generating thermal energy as energy used for ejecting ink, particularly in the ink jet recording system. The present invention brings about excellent effects in a recording head and a recording apparatus of the type in which the state of ink is changed by the heat energy. This is because such a system can achieve high density recording and high definition recording.

With regard to its typical structure and principle, see, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740.
What is done using the basic principles disclosed in 796 is preferred. This method is a so-called on-demand type,
Although it can be applied to any of the continuous type, in particular, in the case of the on-demand type, it can be applied to the sheet holding the liquid (ink) or the electrothermal converter arranged corresponding to the liquid path. By applying at least one drive signal corresponding to the recording information and giving a rapid temperature rise exceeding nucleate boiling, heat energy is generated in the electrothermal converter, and film boiling is caused on the heat acting surface of the recording head. Liquid (ink) corresponding to this drive signal in a one-to-one correspondence
It is effective because bubbles can be formed inside. Due to the growth and contraction of the bubbles, the liquid (ink) is ejected through the ejection opening to form at least one droplet. It is more preferable to make this drive signal into a pulse shape because bubbles can be immediately and appropriately grown and contracted, so that liquid (ink) ejection with excellent responsiveness can be achieved. As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise on the heat acting surface are adopted, further excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the discharge port, the liquid passage, and the electrothermal converter (the linear liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned specifications, US Pat. No. 4,558,333, US Pat. No. 4,558,333, which discloses a configuration in which a heat acting portion is arranged in a bending region.
The structure using the specification of No. 59600 is also included in the present invention. In addition, Japanese Unexamined Patent Publication No. 59-123670 discloses a configuration in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy is provided. The effect of the present invention is effective even if the configuration corresponding to the ejection portion is disclosed in JP-A-59-138461. That is, according to the present invention, recording can be surely and efficiently performed regardless of the form of the recording head.

Furthermore, the present invention can be effectively applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium which can be recorded by the recording apparatus. Such a recording head may have a configuration that satisfies the length by a combination of a plurality of recording heads or a configuration as one recording head integrally formed.

In addition, even in the case of the serial type as in the above example, the recording head fixed to the main body of the apparatus or the electrical connection to the main body of the apparatus and the ink from the main body of the apparatus by being mounted on the main body of the apparatus. The present invention is also effective when a replaceable chip-type recording head that can be supplied or a cartridge-type recording head in which an ink tank is integrally provided in the recording head itself is used.

Further, as the constitution of the recording apparatus of the present invention, it is preferable to add ejection recovery means of the recording head, preliminary auxiliary means and the like because the effects of the present invention can be further stabilized. Specifically, heating is performed by using a capping unit, a cleaning unit, a pressure or suction unit for the recording head, an electrothermal converter or a heating element other than this, or a combination thereof. Examples thereof include a preliminary heating unit for performing the discharge and a preliminary discharge unit for performing discharge different from the recording.

Regarding the type and number of recording heads to be mounted, for example, only one is provided corresponding to a single color ink, or a plurality of inks having different recording colors and densities are supported. A plurality of pieces may be provided. That is, for example, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but it may be either the recording head is integrally formed or a plurality of combinations may be used. The present invention is also extremely effective for an apparatus provided with at least one of full-color recording modes by color mixing.

In addition, in the above-described embodiments of the present invention, the ink is described as a liquid, but an ink that solidifies at room temperature or lower and that softens or liquefies at room temperature may be used. Or, in the inkjet system, it is common to control the temperature of the ink itself within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature so that the viscosity of the ink is within the stable ejection range. Sometimes, a liquid ink may be used. In addition, the temperature rise due to thermal energy is positively prevented by using it as the energy of the state change from the solid state of the ink to the liquid state, or in order to prevent the evaporation of the ink, it is solidified and heated in the standing state. You may use the ink liquefied by. In any case, by applying heat energy such as ink that is liquefied by applying heat energy according to the recording signal and liquid ink is ejected or that begins to solidify when it reaches the recording medium. The present invention can be applied to the case where an ink having a property of being liquefied for the first time is used. In this case, the ink is
JP-A-54-56847 or JP-A-60-7
As described in Japanese Patent No. 1260, it may be configured to face the electrothermal converter in a state of being held as a liquid or a solid in the concave portion or the through hole of the porous sheet. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, the ink jet recording apparatus of the present invention may be used as an image output terminal of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, and a facsimile apparatus having a transmitting / receiving function. It may be a form or the like.

[0064]

As described above, according to the present invention,
For 128 ink jet printer outlets,
The number of pixels of the line sensor of the scanner unit is set to 256 so that the number of effective pixels of the line sensor is 128 when copying the original in the copy mode, and the number of effective pixels of the line sensor is 25 when reading the original in the transmission mode.
Since it is controlled to set to 6 pixels,
High-speed reading is possible in the transmission mode. Also,
In copying an original in the copy mode, when invalid image data is output from the line sensor, the copying time can be shortened by increasing the driving speed of the line sensor.

Further, by using a FIFO (first-in first-out line buffer), it is possible to set the copying speed in the copying mode as in the conventional case.

Further, high-speed copying and high-speed reading are also possible when reducing the read original.

Further, by using a BASIS structure sensor for the image sensor, the copying speed in the copying mode can be increased and the structure of the sensor drive circuit can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of a scanner unit in a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an internal configuration of a reading unit in FIG.

FIG. 3 is a perspective view showing the external appearance of the ink cartridge of the printer unit in the facsimile apparatus according to the embodiment of the present invention.

FIG. 4 is a perspective view showing the appearance of the printer unit.

FIG. 5 is a front view showing a state of an ink ejection unit of the inkjet recording head of the printer unit.

FIG. 6 is a block diagram showing a circuit configuration of an electric system of a scanner unit in the facsimile apparatus according to the exemplary embodiment of the present invention.

7 is a timing chart showing the timing of drive clocks in the copy mode of the line sensor of FIG.

8 is a timing chart showing the timing of drive clocks in the transmission mode of the line sensor of FIG.

FIG. 9 is a block diagram showing a circuit configuration of an electric system of a scanner unit in a facsimile apparatus according to another embodiment of the present invention.

10 is a timing chart showing the timing of the drive clock of the FIFO of FIG.

FIG. 11 is a circuit diagram showing a configuration of a line sensor having a BASIS structure according to still another embodiment of the present invention.

12 is a timing chart showing the timing of drive clocks in the copy mode of the line sensor having the BASIS structure of FIG.

13 is a timing chart showing the timing of drive clocks in the transmission mode of the line sensor having the BASIS structure of FIG.

[Explanation of symbols]

 11 Scanning Part 12 Main Scanning Belt 13 Main Scanning Motor 14 Main Scanning Guide 15 Sub-scanning Carriage 16 Sub-scanning Belt 17 Sub-scanning Guide 22 Light Source 23 Selfoc Lens Array 24 Line Sensor (Line Image Sensor) 25 Original Glass Plate 26 Original 41 Analog Amplifier 42 A / D converter 43 Image processing unit 44 Illuminance control circuit 71 FIFO 91 BASIS 92 Pixel 93 OS terminal

Claims (4)

[Claims] 1. A scanner unit using an image sensor having a reading width longer than the print width of the printer unit, and the number of effective pixels of the image sensor is reduced when copying a document in a copy mode. When a document is read according to the print width of a copy and the document image is transmitted in the transmission mode, the number of effective pixels of the image sensor to be used is increased as compared with that in the copy mode to read the document. A facsimile machine comprising: 2. The reading control means increases the driving speed of the image sensor when invalid pixel data is output from the image sensor during reading of a document in a copy mode. Fax machine. 3. A first-in first-out type line buffer is connected to a stage subsequent to the image sensor,
3. The facsimile apparatus according to claim 1, wherein a read clock of the line buffer and a head drive clock of the printer unit are synchronized. 4. The facsimile apparatus according to claim 1, wherein a line sensor having a BASIS structure is used as the image sensor.