JPS61171348A - Information recording apparatus - Google Patents

Abstract

PURPOSE:To provide an apparatus for processing the same lines of odd number and even number pages in a simultaneous parallel manner at the time of covered binding printing, by providing a control means for advancing the address of memory corresponding to each line so as to print the same lines of an odd number page and an even number page. CONSTITUTION:Size information and character information are stored in a page buffer register (OBF)121 or PBF122. These registers PBF121, PBF122 independently have address counters 123, 124, 125. By providing a plurality of page buffer registers, recording informations on a plurality of BFs are simulta neously read and two informations can be recorded on one recording paper in a superposed state. The informations corresponding to four pages stored in PBF122 can be also recorded on one page by a small character.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a recording device that prints on a recording medium line by line. The present invention relates to a device that simultaneously prints the right page and left page of paper when performing double binding printing.

[Prior art]

Conventionally, there has been no device that can perform print processing on multiple areas simultaneously in parallel.

〔the purpose〕

In view of the above points, it is an object of the present invention to provide an apparatus that simultaneously processes two lines of the same line on odd-numbered pages and even-numbered pages during cover-stitch printing.

〔Example〕

The present invention will be described in detail below using a recording device that records information by scanning a recording medium with a laser beam as an embodiment. FIG. 1 is a block diagram showing an outline of the recording device, and shows a specific configuration It consists of a device such as a magnetic tape, and includes an information providing unit 100 that derives information to be recorded, a control unit 110 that controls the information to be recorded obtained from the information providing unit 100 so as to be suitable for recording, and the control unit 110. It consists of a recording unit 300 that records information sent from the unit 110 onto a recording medium. In this embodiment, this recording unit 300 scans a photoreceptor with a laser beam modulated according to recording information. A recording apparatus is used in which a latent image is formed on a photoreceptor, toner is attached to the latent image H, and the toner is transferred onto recording paper. First, this recording apparatus will be explained in detail. 2 and 3 are a perspective view showing an outline of the recording device and a perspective view showing an outline of the actual device. In these figures, the laser oscillator 3
The laser beam oscillated from 1 reflection mirror 302
One reflective mirror 302 is guided to the input aperture of the modulator 303 via.

It is inserted to bend the optical path in order to reduce the space of the device, and can be removed if it is not needed.

For the modulator 303, an acousto-optic modulation element using a known acousto-optic effect or an electro-optic element using an electro-optic effect is used.

In the modulator 303, the laser beam is modulated in intensity according to the input signal to the modulator 303.

In addition, when the laser oscillator 301 is a semiconductor laser, a gas laser, etc. that can perform current modulation, or an internally modulated laser that incorporates a modulation element in the oscillation optical path, the modulator 303 is omitted and guided directly to the beam expander 304.

The beam diameter of the laser beam from the modulator 303 is expanded by a beam expander while remaining a parallel beam. moreover,
The laser beam with enlarged beam diameter is multifaceted with one or more mirror surfaces! The light is incident on the body rotation mirror 305. The polyhedral rotating mirror 305 is mounted on a shaft supported by a high-precision bearing (for example, an air bearing), and is driven by a motor 306 that rotates at a constant speed (for example, a hysteresis synchronous motor, a DC servo motor).
5, the horizontally swept laser beam 312 is f-
The imaging lens 307 having the θ characteristic allows the photosensitive drum 3 to
08 as a spot. In a general imaging lens, when the incident angle of the light ray is θ, the image forming position r on the image plane
There is a relationship f = f * tan θ - (1) (f: focal length of the imaging lens), and as in this embodiment, the laser beam 312 reflected by the fixed polyhedral rotating mirror 305 forms an image. The angle of incidence on the lens 307 changes linearly with time. Therefore, the photosensitive drum 30 serving as the image surface
The moving speed of the imaged spot position on 8 changes non-linearly and is not constant.

That is, the moving speed increases at the point where the angle of incidence increases. Therefore, by turning on the laser beam at regular time intervals,
When the spot rows are placed on the photosensitive drum 308, the intervals between them are wider at both ends than at the center. In order to avoid this phenomenon, it is designed to have the following characteristic: r=f·θ−(2).

Such an imaging lens 7 is called an f-θ lens. Furthermore, when parallel light is imaged into a spot by an imaging lens,
The minimum spot diameter dmin is: dmin=f total (3) However.

f: focal length of the imaging lens; wavelength of the light used; A: entrance aperture of the imaging lens; when f and λ are constant, a smaller spot diameter dmin can be obtained by increasing A. The beam expander 304 mentioned above is used to provide this effect. Therefore, if the required dmin can be obtained by the beam diameter of the laser oscillator, the beam expander 304 is omitted. The beam detector 318 has a small entrance slit and a photoelectric conversion element with a fast response time (e.g.
The position of the laser beam 312 is detected from the laser beam 312 (PIN diode), and this detection signal is used to determine the start timing of an input signal to the modulator 303 for providing desired optical information on the photosensitive drum. As a result, it is possible to significantly reduce errors in the division accuracy of each reflecting surface of the polyhedral rotating mirror 305 and synchronization deviations in horizontal signals due to single rotation unevenness, and to obtain high-quality images. The tolerance range of accuracy required for the motor 306 is increased, and the motor 306 can be manufactured at a lower cost.

As described above, the deflected and modulated laser beam 312 is irradiated onto the photosensitive drum 308, visualized by an electrophotographic process, transferred and fixed onto plain paper, and output as a hard copy.

Next, the printing section 319 will be explained with reference to FIG. 4.

As an example of an electrophotographic process applied to this embodiment, a photosensitive drum whose basic components are a conductive support, a photoconductive layer, and an insulating layer, as described in Japanese Patent Publication No. 42-23910 of the present applicant. The surface of the insulating layer 308 is uniformly charged positively or negatively in advance by a first corona charger 309, and a layer with a polarity opposite to the charged polarity is formed at the interface between the photoconductive layer and the insulating layer or inside the photoconductive layer. Charges are captured, and then the surface of the insulating layer to be charged is irradiated with the laser beam 312 and, at the same time, an AC corona discharge is applied by the AC corona discharger 310, resulting in a difference in surface potential that occurs according to the bright and dark pattern of the laser beam 312. A pattern is formed on the surface of the insulating layer, the entire surface of the insulating layer is uniformly exposed to light, a high-contrast electrostatic image is formed on the surface of the insulating layer, and the electrostatic image is formed with charged colored particles. After being developed and visualized by a developing device 313 using a developer mainly composed of , the visible image is transferred to a transfer material 311 such as paper using an internal or external electric field, and then an infrared lamp, a hot plate, etc. A fixing means 315 fixes the transferred image to obtain an electrophotographic print image, and after the transfer is performed, a cleaning device 316 cleans the surface of the insulating layer to remove remaining charged particles, and the photosensitive drum 308 There is a dispute over the repeated use of .

Note that 314 is a transfer corona discharger, 317 is a post-corona discharger, and the same numbers in each figure indicate the same members.

Next, in the embodiments described so far, the surface of the insulating layer of the photoreceptor, which has been uniformly charged in advance, is attenuated by alternating current corona discharge to attenuate the charge on the surface of the insulating layer, and at the same time, the photoreceptor is irradiated with laser light. The phenomenon that occurs will be further explained in detail with reference to FIG.

FIG. 5 shows the state of change in surface potential on the surface of the insulating layer of the photoreceptor.

Figure 5 (&) shows the case where the AC frequency of AC corona discharge is relatively low. At this time, the potential at the time of AC charge removal on the surface of the insulating layer is shown by a solid line due to the difference in the phase of the AC voltage. It can take values intermediate between the curve and the curve shown by the dotted line.

This is a very short time, for example, 150+1 seconds in this embodiment. Therefore, due to the difference in the potential of the surface of the insulating layer when the laser beam is irradiated, the potential of the electrostatic image obtained after the entire surface is exposed remains constant even though the irradiation amount of the laser beam is constant. It will stop happening.

Therefore, unevenness synchronized with the frequency of the alternating current occurs in the developed image. This phenomenon does not occur when applied to a copying machine or the like, since exposure is performed over the entire AC static elimination area, and the influence of one phase is averaged out.

In order to eliminate this uneven phenomenon, when the frequency of AC static elimination is increased (Figure 5b), the overall static elimination time remains unchanged.
The amplitude of fluctuations in the insulating layer surface potential synchronized with the AC frequency is reduced. Therefore, the potential difference on the surface of the insulating layer during laser beam irradiation is reduced, and the unevenness of the developed image becomes practically negligible. This is explained by the equivalent circuit shown in FIG. In Fig. 6, 81 is the voltage collectively applied to the discharge electrode of the AC corona discharger, Re is the resistance when the corona current flows between the discharge electrode and the photoreceptor, and Cp is the photoreceptor regarded as a capacitance-only load. This shows the capacitance of the photoreceptor when

At this time, if the potential on the surface of the insulating layer immediately before AC static elimination due to -order charging is Vo, and the voltage applied to the AC corona discharge electrode is E=Eo cos (Wt+), then the surface of the insulating layer during AC static elimination is The potential Vp of +Voe−
-----------(4) It is expressed as CPRc ψ゛tan-1 (wcPRc).

From equation (4), the static elimination time is given by the second term on the right side, and its time constant τ is CPRc.

Furthermore, regarding the fluctuation due to the frequency of AC corona discharge, the AC static elimination time td is given by fL: width of static elimination area, as shown in FIG.

Further, the amount corresponding to CP in the equivalent circuit of FIG. 6 is proportional to the surface area of the photoreceptor that passes through the static elimination area per unit time.

Cp = A v −−−−−−−(6) A
:Constant of proportionality, where: CP"CPI, RC=RCI
, Y=%'l, and if the static electricity is removed sufficiently, the time constant of static electricity removal in equation (4) is τt=cpIRc1. −−−−−−(7) At this time,
It is assumed that the amplitude WO of the fluctuation caused by the AC discharge frequency WO is large enough to cause density unevenness in the developed image. By setting W=W1 (Wt>Wo), the following holds true: ------- (9) It is assumed that Wl is sufficiently small so as not to cause the density unevenness.

In this way, by changing the frequency of AC corona discharge, the density unevenness can be removed without changing the static elimination time.

Next, assuming that the circumferential speed of the drum is ■;αv1=v2, CF2=αCp t −−−−−−−−(10
) Static elimination time is td2=1~=+;-gate-==-(l
1) tdl=eaves Therefore, in order to sufficiently remove static electricity within td2 during static neutralization, static elimination time constant τ2; CP2・Rc2=2=standing u− and IL +++++
+++ (12) α α CP2" αCP1, so 1'1 (2 = town soup ---------1 (13)
It is necessary to become.

In practice, changing Rc is achieved by changing the distance between the discharge electrode wire and the photoreceptor.

At this time, the amplitude W2 of the fluctuation due to the frequency of the AC corona discharge is O W2 = −−−−−−−(14)
2P2C2+ and W2 becomes Wl, so finding the condition for W2 is W
2Cpi2Rc2=WICplRcl',' w2=w
l・ru ÷ t→αW l −−−−−=−(15)
From equation (15), it is necessary to apply an AC corona frequency larger than a certain value in order to prevent the unevenness of the developed image, and that value is proportional to the circumferential speed of the drum. The circumferential speed V is 30 cm/sec, the width of the static elimination area is 3 cm x 30 cm, and the capacitance G of the photosensitive plate is 5 PF/sec.
cm, AC static elimination current is 751LArms, voltage is 7KV
, the frequency f was 1 KHz, and the electrostatic contrast was about 500 V.

The development was carried out using liquid development and reversal development. From these experiments, it was possible to remove the unevenness of the developed image under the condition that the frequency f of AC static elimination was 1". This means that the pitch due to the frequency of AC corona discharge at is 0.3 mm.Therefore, the above (
The effect of equation 16) is more generally expressed under the condition that f≧] "---- (17).

P is a constant determined by the capacitance of the photoreceptor, the width of the static elimination area, the development conditions, etc., and was 0.03 in the above example.

As still another example, the present applicant's Japanese Patent Publication No. 42-19
An electrophotographic electrostatic image forming process such as that described in Japanese Patent No. 748 is applied. That is, a photosensitive plate having a conductive support, a photoconductive layer, and an insulating layer as base constituents is used, and the surface of the insulating layer is uniformly positively or negatively charged in advance by a first corona discharge, and the photoconductive layer and A charge having a polarity opposite to the charged polarity is captured on the surface of the insulating layer or inside the photoconductive layer, and an alternating current corona discharge is applied to the charged surface to attenuate the charge on the surface of the insulating layer, and then an information signal is generated. The process of irradiating the laser beam as described above, forming an electrostatic image on the surface of the insulating layer according to the brightness of the laser beam, and then developing the electrostatic layer is the same as in the first embodiment.

The photoreceptor and laser oscillator used in the first and second embodiments were as follows.

Combination A b) Laser oscillator He-Ne gas laser wavelength 632.8 mp.

(1) Add 10 g of vinyl chloride to 90 g of cadmium sulfide activated by copper photoreceptor, add a small amount of thinner, and mix the resulting photosensitive material onto an aluminum foil with a thickness of about 70 mm.
Next, a Mylar film with a thickness of about 251 L is adhered to the surface of this photoconductive film using an adhesive to obtain a photosensitive plate, and the photosensitive member is made of aluminum. In the case of this photoreceptor, which is wound around a drum, the polarity of the first charge is positive.

Combination B a) Laser oscillator
!゛He-CdHe-Cd laser 41.6 m p
.

A Te layer with a thickness of about IIL was vacuum-deposited on the photoreceptor aluminum substrate, and a Se layer containing 15% Te was further vacuum-deposited with a thickness of about 901L, and a transparent insulating resin was applied on the surface with a thickness of about 30L. In the case of this photoreceptor, the first charging polarity is negative.

Furthermore, various laser light sources currently announced or to be announced in the future may also be applied to the first and second latent image forming processes. It is important to devise a combination of photoreceptors whose spectral sensitivity characteristics match the wavelength of each laser.

Ar gas laser Kr gas laser Ar+krtp (visible) semiconductor laser dye laser infrared laser Nonlinear crystal of infrared laser light Therefore, in such a recording device, the photoreceptor drum 308
The motor 3 rotates at a constant speed in the direction of the arrow.
06 is driven so that the beam 312 moves at a constant speed on the photosensitive drum 308 in a direction approximately parallel to the rotation center axis of the photosensitive drum 308, and the beam 312 is shaped like the letter "A". Characters can be drawn on the photosensitive drum 308 as shown in FIG. 7 by modulating them with the modulator 303 which is controlled in a drawing manner.

As will be explained in detail later, this device converts certain characters to lower case,
It can be drawn in three sizes, medium and large, but the letters are made up of dots arranged in a matrix as shown in Figure 7, and the lowercase letters are as shown in Figure 7. At is drawn by selecting 7 x 9 dots as shown (i.e. drawn by 9 scanning lines), and a blank space corresponding to 6 scanning lines is placed above the lowercase letter. On the right, an empty space equivalent to two dots is the space required to output information for one lowercase letter. The medium letters are drawn by selecting 14 x 18 dots as shown in Figure 7B (i.e. drawn by 18 scanning lines), and the upper part of the medium letters corresponds to 12 scanning lines. There is a blank space corresponding to 4 dots to the right of the character, and the blank space including the blank space is:
This is the space required to output the information of one Chinese character.

The uppercase letter is drawn by selecting 36 x 28 dots (i.e., drawn by 36 scan lines), and has a blank space equivalent to 24 scan lines at the top of the uppercase letter, as shown in Figure 7C. , a blank space corresponding to 8 dots is provided to the right of the character, and 60 dots including this blank space are provided.
The space corresponding to ×36 dots is the space required to output information for one uppercase letter. However, as will be detailed later, this uppercase letter uses the same character generator as the medium letter generator and uses the L dot of the medium letter as 4 dots in order to simplify the configuration of the single character generator. The character resolution is the same as that of Chinese characters.

The outline of Recording Unit) 300 is as mentioned above,
Returning to FIG. 1 again, the information supply unit 100 and control unit 101 will be described in detail.

The information providing unit 101 is not necessarily limited to a magnetic tape as described above, but may be another storage device or a computer itself; in short, it may be anything that can derive the information to be recorded. However, from this information supply unit 100, a signal coded with information to be recorded in two recording bits and a control signal are derived, but such information is not stored on a magnetic tape (not shown). ! It is housed in the format shown in Figure 8.

That is, at standard density, information is stored on a magnetic tape in blocks as shown in Figure 8A, but this one block is further divided into 34 unit areas (records).
This L record is further composed of 276 characters, and each block is written as 1 in Chinese characters on the recording paper 103, as shown in FIG. 9A.
It stores information equivalent to one page consisting of 136 characters per line and 66 vertical lines.

To explain in more detail, the 1st code is an area where control signals are stored, and the 1st to 3rd characters have I
D information, the fourth character stores function information to be described later, the fifth character stores mode information, the sixth and seventh characters store multi-copy information, the seventh character stores reduced printing information, and the ninth to The 276th character is
The first code does not store any meaningful information.

In this way, only the control information is stored in the 2nd to 34th codes, but the 2nd to 34th codes contain information (hereinafter referred to as character information) of characters, symbols, etc. (hereinafter referred to as characters) and lines that should be recorded. It contains character size information (hereinafter referred to as size information) for indicating the size of the character for each character, and specifically, the 2nd to 137th characters of a certain record include character size information on the recording paper 103. (The 138th character is a blank space) and the 138th character is a blank space), and the 1st character is a blank space.
37 The character information stored in the character is recorded in the recording unit 30.
When recording with 0, size information that indicates the size of the character for one line is stored, and the 140th to 275th characters similarly encode and store the 136th character information, and the 276th character is Blank space) No. 139
The character stores size information that collectively indicates the size of the characters or symbols stored in the 140th to 275th characters.

In addition, in the 2nd to 34th records, the 276th Kenji Nana hk
The 276th character of the 34th record records a page end signal tα and also includes a signal notifying the end of a certain program.

Therefore, one record stores character or symbol information for two lines of medium-sized characters and character size information that indicates the recording size of the character or symbol information in each line. 1 as shown in Figure 9 A by the 33 side of
It can store information for pages.

FIG. 8B shows a storage format for information to be recorded in a high density (hereinafter referred to as a high density format).
Except that the character or symbol information of two characters is stored, the 274th to 276th characters are blank, and the 1st character stores information specifying the character size stored in the 2nd to 273rd characters. The configuration is similar to that described with respect to FIG. 8A.

Such high-density information consists of 272 characters per line on the A4 size recording paper 103 and 132 such lines as shown in FIG.
This information consists of one page of four sizes.

An end mark for notifying the end of the page is stored in the 276th character of the record corresponding to the last line of one page.

In addition, if the font size specifies uppercase letters in the information recording format shown in FIG. 8A, in each record,
Treat only the character information of characters 2 to 69 and 140 to 207 as valid information related to printing, and characters 70 to 137.
, Nos. 208 to 275 are not printed.

In this embodiment, the control signal as described above is provided, and the following instructions can be given using this signal.

! That is, the mode information indicates whether the character information is standard density as shown in Figure 8A or high density information as shown in Figure 8B, and the function information indicates whether the information to be recorded is fixed data or variable. (Here, fixed data refers to data that is commonly used for each page when two pieces of information are superimposed and recorded on one page. Therefore, when one piece of information is superimposed on another piece of information, After printing, if both data are unnecessary, either of the two data can be used as solid data or variable data, but for example, when recording multiple different destinations for each body of text with the same content. In such cases,
The main text is fixed data and the destination is variable data. Note that data that does not require superimposition is defined as variable data. Furthermore, when specifying that the data is variable,
It includes a signal indicating whether or not to revise (with fixed data). Reduced print information is information for 4 pages (not necessarily limited to 4 pages, multiple pages are fine) on one output paper.
This instructs whether to print a page in reduced size (hereinafter such a printing form will be referred to as reduced size printing) or whether to print one page's worth of information on one page (hereinafter referred to as normal printing).

? s7koTn&*#ro144LL-/? -INx:,r
, s1 day 1 female ink 8. When a certain program consists of n blocks, it is provided only in the first block, and when printing is started from a specific program, it is a means to specify this program. used as.

Also, the multi-information specifies the number of copies.

Since a large amount of block-based information as shown in FIG. 8 is stored on the magnetic tape, a control output is applied from the magnetic tape control circuit 104 of the control unit 101 to the magnetic tape control line 105. By controlling the reading of information from the magnetic tape, the read information is obtained on the output line 106.

The magnetic tape control circuit 104 controls the information on the magnetic tape to be read out in blocks.
In this block, the information is derived from the first code side.

As mentioned above, character information is stored as coded information on a magnetic tape, and in this embodiment, the EBICDIC code is used as such code, so in order to convert this code into an ASC1l code, the output line The information on 106 is applied to code converter 107.

Of course, the code converter 107 can be omitted or changed depending on the code to be stored on the magnetic tape or the code used in the control unit 101.

The information converted into ASCII code in this way is applied to the distributor 108, but this distributor 10B classifies the size information, the information to be recorded, and the control signal, and sends the size information and recording information onto the signal line 109. The ID signal is stored in the ID register 115 via the signal line 110, and the function signal is stored in the function register 118 via the signal line 113.

The mode signal is sent to the mode register 11 via the signal line 112.
7, the function signal is stored in a function register 118 via a signal line 113, and the reduced printing signal is stored in a reduced printing register 119 via a signal line 114.

The size information and character information are stored in a page buffer register (hereinafter referred to as OBF) 121 or PBF 122 via a gate 120, and this buffer register 121 is a register used to store the fixed data, and the l Capacity to store block information,
(approximately 9 bytes), BF122 is a register used to store the fluctuation data, and each of the BF1
4 registers BF12 with storage capacity equal to 21
It is a storage device consisting of 1-1 to 121-4 and has a capacity of about 36 bytes, and any random access memory (RAM) that satisfies the necessary access time may be used, but in this embodiment, a semiconductor memory is used. do ! It is something that exists.

The PBF121 and PBF122 are address counter 1.
23, 124, and 125 independently, it is also possible to read both PBFs at the same time.

Note that the PBF 122 has two address counters 12.
4,125, the address counter 124 controls writing and reading of recorded information in the BFs 122-1 to 122-4, and the address counter 125 controls the writing and reading of recorded information in the BFs 122-1 to 122-4.
-3°122-4 to control reading of stored information. By providing multiple page buffers in this way, it is possible to simultaneously read the recorded information on multiple BFs and record two pieces of information on one recording paper in an overlapping manner. It is also possible to record four pages of information in small characters on one page.

As mentioned above, the size information and character information are stored in the PBF 121 or PBF 122, but this discrimination is controlled by a gate signal applied to the write control circuit 12B (registered) 120.

A gate signal is applied to the control circuit 126 to control the gate 120, and there are eight types of combinations of these three command signals as shown below.

However, when instructing variable data, there are two types: a case where an instruction is given to read out overlapping with fixed data, and a case where no instruction is given.

(1) Fixed data standard density, normal printing (2) Fixed data standard density, reduced printing (3) Variable data (overlapping) standard density, normal printing (4)
Variable data (overlap) High density, normal printing (5) Variable data (overlap) Standard density, reduced printing (8) Variable data (no overlap) Standard density, normal printing (7) Variable data (no overlap) High density, normal Printing (8) Variable data (do not overlap) Standard density, reduced printing and other combinations are errors.

In such a command signal, in the case of (1) above, the PBF
121, in case of (2), go to PBF121, in case of (3), go to PBF121-1, in case of (4), go to PBF122
-1 to 4; in case of (5), to PBF122-1 to 4;
In case of (6), go to PBF122-1, in case of (7), go to PBF122-1.
to BF122-1 to 4, and in the case of (8), PBF1
The gate signal is formed so that the size and character information are written to 22-1 to 22-4, respectively.

The information applied to the PBF 121 or PBF 122 in this way is transmitted from the write control circuit 126 to the signal line 127,
PBF 12 is sequentially controlled by address counters 123 and 124 controlled by a write control signal applied by PBF 128.
It is stored within 1°122.

Note that when the write control circuit 126 determines that the control signal for a certain page instructs reduced printing, it controls so that the information for A pages is read continuously into the PBF 122-1-122-4. It is. However, if one program ends without satisfying four PBFs, only the page that ends this program will be read, and therefore, in such a case, there is a possibility that the number of pages will be less than four. .

As described above, once the information has been stored in the PBF, the signal line 1
29 applies a write end signal to the main control circuit 130, and upon application of this write end signal, the main control circuit 130 gives a read command signal to the read control circuit 131 through the signal line 132.

Next, such information is read out and printed. For example, the control circuit as described in (6) above, that is, the information characters with control signals for variable data (non-overlapping), standard density, and normal printing. To describe the state in which the size information and size information are stored in the PBF 122-1, since the information of the registers 117 to 119 described above is applied to the read control circuit 131 through the signal lines 133 to 135, it will be explained here. The recorded information is P B F , +122
-1 is stored.

BF12 is input to the address counter 124 by the signal line 136.
This command commands the reading of 2-1.

Here, the address counter 123 will be explained in more detail with reference to FIG. It has two relative counters 206 for counting , the contents of these two counters 205 and 206 are added by an adder 207, and the address on the PBF 121 is specified by the output of this addition.

To describe in more detail, the reference counter 205 has an output terminal 211 that derives the outputs of each of the plurality of storage elements constituting the counter in parallel, and a row that notifies that all scanning of a certain row has been completed. It has a terminal 212 for applying a completion signal and a clear terminal 213 for clearing the contents of the reference counter 205 before starting printing of a certain page. The relative counter 206 also has an output terminal 218 for deriving the respective outputs of a plurality of storage elements constituting the counter in parallel, and a terminal 215 for applying a digit end signal to notify when scanning of a certain scanning line is completed. It has a clear terminal 216 for clearing the contents of the relative counter 206 by applying a scanning line end signal generated when the scanning line ends.

The output terminal 218 is connected in parallel to the storage elements that constitute the lower digits of the register 207, and the output terminal 211 is connected in parallel to the storage elements that constitute the upper digits of the register 207.

To explain in more detail, the number of lower digits is the number of digits required to count the number of characters NC stored in one line, and when one bit is written to the LSD of the upper digit, the NC is added to the register 207 as a whole. Set the value so that it is
The number of high-order digits can be determined by counting the number of lines included in one page.

Therefore, when one digit end signal is applied from 215, the count value of register 207 increases by l, and when one row complete signal is applied, the count value of register 207 increases.

In short, the register 207 operates as an adder.

The address counter 123 has the above-described configuration, and since the counters 205 and 206 are cleared before reading out the PBF 121, the output of the register 207, which functions as an adder, becomes O, which is the address θ, that is, Specifies the address of the first character information on the first line of a certain page.

Once this read is complete, a digit complete signal is applied and
Since 1 is added to the contents of the relative counter 206, the output of the register 207 becomes l, which specifies the address of the character in the second digit of the first line.

From here on, continue reading in the same way and read the NC character (
When the output of the register 207 becomes NC-1), it means that the first reading of the first row has been completed. (Since one line of characters is formed, the line of information must be read m four times to complete the printing of one line.) A scan line end signal is generated to clear the relative counter 206. do.

Therefore, the output of the register 207 becomes °゛O'' again, and after reading m characters as described above, the scanning line end signal is generated again. By repeating this operation, the mth scanning line end signal is derived. At the same time, the row completion signal is applied to the terminal 212 of the reference force counter 205, so the counter 205 adds NC to the contents of the register 207.
Its output becomes NC.

Since this NC is the address where the first character of the second line is stored, the first character is read out and the digit that is applied upon completion of such reading is ! Due to the completion signal, the output of the register 207 becomes NC+l, indicating the address of the second character on the second line.

Similarly, the output of the register 207 becomes 2NC.
-1, the scanning line end signal is applied, and the address specification from NC address to NC+1, ------2NG-1 is repeated again, and the scanning line end signal is derived m times in the second line. At the same time, the contents of the reference counter change to 2NC.
When the content of the relative counter 206 becomes O, the third line is read out repeatedly. By repeating the reading of 0 or more, information corresponding to one page is read out. In this way, the reference counter and Since a relative counter is used, even when character information on the same line is repeatedly read out, the relative counter can simply be cleared, making read control extremely simple.

Although only the address counter 124 has been described in detail here, the address counters 123 and 125 are configured in exactly the same way.
When the diagram of FIG. 14 is used in connection with , the number used in FIG. 14 is used with a subscript (-1) and an address callan. Size latches 138 and 139 record the size information recorded at the forefront of each line of character information to be recorded in one line.
38, the information read out by the address counter 125 is stored in the size latch 139, and the gate 13
7 is controlled by a read control circuit 131 via a signal line 140.

Therefore, in the above example, the read control circuit 131
36 issues a read command to the address counter 124, the gate 137 is controlled so as to lead the read character size information to the size latch 138.

Next to the character size information, character information is read out, and after reading out the character size information, the game 137 is controlled by the readout control circuit 131 so as to lead the read information to the data latch 141. be.

-＾μ- に 1su 7 Gods I'm drunk! (When it is determined that it is standard density information, the size information is read as is, and while reading the information equivalent to 136 characters in a certain row, it is read out sequentially to the data latch 141.) The control is such that when information is applied and reading of a certain line is completed, the readout information is applied to the data latch again in sequence from the beginning of the 136 characters. (When printing is not completed) Also, when the reading control circuit 131 determines that the information is high-density information, the character size information is read and the data latch 141 is held while the information corresponding to 275 characters is being read. This is to control so that the cycle in which read information is applied is repeated.

The size latches 138 and 139 each have a decoder 14.
2,143 are provided, and such decoders 142,
143, large, medium, and small character size information is decoded. Signal lines 144 and 145 are connected to the decoders 142 and 143 from the readout control circuit 131, and these signal lines are used to apply control signals during reduced printing.
When uppercase letters are decoded as medium letters, medium letters are decoded as lowercase letters, and normal printing is performed, no control signal is applied.

The output of either of these decoders 142, 143 is led out onto a signal line 144 via a gate 145, but in the case of a reduced printing signal, it functions as a gate to allocate and select the output of either decoder by time, and in the case of normal printing. is 14
It works to select the second output. That is, in reduced printing, when the decoder 142 is selected, the output of the decoder 142 is applied to the signal line 144, and when the decoder 143 is selected, the output of the decoder 143 is applied to the signal line 144. The signal is applied to a signal line 144 and is controlled by a read control circuit via a signal line 146.

147 and 148 are line counters, each of which counts the number of scanning lines required to form a character, and when a predetermined number of lines have been counted, signal lines 226 and 227 are sent to the readout control circuit 131.
Specifically, when the size of the output from the decoders 142 and 143 is a lowercase character, the output is derived after counting <15 scanning lines, as shown in FIG. 7A. As shown in the figure, the configuration is such that the output is derived after counting 30 scanning lines for medium characters. As will be described later, uppercase letters are constructed in the same way as medium letters.

Note that the vertical output from the vertical clock circuit 149 is applied to the counting circuit selected in this way to cause the vertical output to be counted. This line counter 1 is generated every time it is executed or completed.
The output of 47.148 indicates the number of scans to be performed for a certain character.

Note that uppercase letters also serve as a middle letter generator, so when an uppercase letter is detected, the vertical output count will be l/
In other words, a gate is provided which is controlled by the reduction printing signal so that the number 1 is counted by two vertical clocks. The outputs of the line counters 147 and 148 are applied to a changing circuit 152 via a gate 151, and the output of this changing circuit 152 is further applied to a character generating circuit 150. Note that the gate 151 is the gate 14
5) It is controlled by a control signal on the signal line 146, and operates to select the output of one of the counters only during reduced printing, and to select the signal from the line counter during normal printing. It is.

Now, to describe the character generation circuit 150 in more detail, this circuit outputs character information from the output line 153 of the data latch 141 to the signal line 144, as shown in FIGS. 1 and 10A. , and apply the font size information.
Apply to the 1 inch Dobata main terminal 155 or the medium character generation terminal 1
56 (when the character size information indicates an uppercase character, it is applied to the medium character generation terminal 156), and the output from the change circuit 152 in the character information applied from the terminal 155 or 156. line 159
The dot signals corresponding to the scanning line selected by the above output signal are outputted in parallel to the dot output line 158.

This dot output line 158 outputs the Di-D of the dot output line 158 when a lower case size signal is applied from the signal line 144.
7 and when a medium character size signal or a large character size signal is applied from the signal if 44, signals are simultaneously obtained to D1 to D014 of the dot output lines 158.

To explain how to generate a lowercase letter size "A" with reference to FIG.
44 to the selection circuit 157, the information code signal of one character A is applied to the lowercase character generation terminal 155.

At this time, if a signal instructing the first scanning line is applied to the character generator 154 via the output line 159, the dot output lines D1 to D7 will be the first scanning line dots in Figure B).
Outputs can be obtained at D3-D5 corresponding to 160-162. Similarly, the second
When you apply a signal indicating that it is a scan line.

The dot output line DIND7 can obtain outputs at D2 and D6 corresponding to the dots 163 and 164 of the second scanning line in FIG. Thereafter, by sequentially instructing the scanning line numbers up to 9 in the same manner, the dot output lines D1 to D7 are
The output can be obtained from the dot output line corresponding to the dot shown in B. unwritten here
I have described in detail the generation of a single character dot signal, but when a medium character is specified, the character information is transmitted to the medium character generation terminal 156.
By applying a signal specifying the scanning line number from the output line 159, a dot signal corresponding to the specified scanning line is generated.
As shown in Figure 2, since the medium character is configured to select 14x18 dots, there are 1 to 18 scanning lines to be specified by the output line 159, and when such a scanning line is specified, the dot output lines D1 to 18 are selected. 014 and can simultaneously obtain output. The dot outputs output in parallel to the dot output lines D1-D7 or D1-014 in this manner are simultaneously written in parallel to the shift register 165. This shift register 165 is connected to a horizontal clock generator 166 that generates a clock signal synchronized with the speed at which the laser beam 312 scans the photosensitive drum 308.
Since the dots are shifted by clock pulses from the dots, they are shifted sequentially as the laser beam moves and are read from the dot output Dl side.

Assuming that FIG. 7B is the letter A to be drawn on the photosensitive drum 308, the laser beam
When the output of the first dot is read out from 65 and the laser beam is located at the second column position C2, a shift pulse is applied.
2nd dot) Read the output of D2, and the laser beam
When located at column position C3, a shift pulse is applied and the third
The structure is such that when the laser beam moves one column position, such as when reading out the output of the dot D3, one shift pulse is applied to shift one bit.

In this way, when scanning to a predetermined column position on the scanning line for a certain character is completed, the next character information is transferred to the data latch 1.
41, and read out the dot signal corresponding to the certain scanning line.

This is transferred to the shift register 165 in parallel, but if you read out the next character information immediately after reading out one character information in this way, the adjacent characters will be too close together and will be difficult to read. Since this is not practical, in this embodiment, in the case of lowercase letters, a four-dot blank space is provided in the case of middle letters, as shown in FIG. 7A.

In FIG. 1A, 167 is a blank space forming circuit provided to form such a blank space 7, and it applies a blank signal to the shift register 165. That is, dot output line D8. The dot output line D is connected to the lowercase blank line 169 connected to D9 and the shift register 165.
Chinese character blank line 1 connected to the storage element connected to 14
70, and when lowercase letter size information is applied through the signal line 144, a blank signal is applied to the lowercase blank line 169 and applied to the storage element corresponding to the $8 and 9 column positions of the shift register 165; When large or medium character size information is applied through the signal line 144, a blank signal is applied to the medium character blank line 170 and applied to the storage elements corresponding to the 15th to 18th column positions of the shift register 165. It is.

In this way, the empty interior forming circuit 167 is provided, and a part of the horizontal clock generator 166 counts nine clock pulses, and when the counting is completed, the readout control circuit 1
31, a lowercase character counting circuit that returns to zero upon sending a completion signal to 31, a middle character counting circuit that counts 18 clock pulses and returns to zero upon completion of counting, sending a completion signal to readout control circuit 131 via signal line 171, and 36 clock pulses. When the counting is completed, a completion signal is sent to the readout control circuit 131 via the signal line 171, and when the count is reset to zero, an uppercase character counting circuit is provided. The read control circuit 131 has a gate circuit that determines whether to apply a clock pulse to the address counter 123, . . . upon arrival of a completion signal from the selected character counting circuit.

This command instructs the selected one of 124 and 125 to read the next character.

Note that the character generation circuit 154 does not have a circuit for generating uppercase letters, but this is unnecessary because one dot of a medium letter is formed as four dots, as is clear from FIG. 7B and C. For this reason, the horizontal clock generator 166 has a frequency dividing circuit that divides the clock frequency into 1/2 when the uppercase character size information is applied.
When uppercase character size information is applied through the signal line 144, a shift pulse is applied to the shift register 1 from the application line 168.
65 so as to apply a clock having half the normal frequency.

As described above, by providing the horizontal clock generator 166 and the character generation circuit 150, a predetermined blank space is formed between horizontally adjacent characters in accordance with the size of the characters.

However, if left as is, the lines, that is, the vertically adjacent characters, would be in close contact with each other; however, in this embodiment, the line counters 147, 14
After applying the output of character generator 1 to change circuit 152, character generator 1
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For lowercase letters, such as QI A v&r L-1000, the vertical clock circuit 149 receives a signal from the horizontal clock circuit 166 every time the horizontal clock circuit 166 counts clock pulses corresponding to the number of dots required to form one character on the scanning line. 278, but (when the character size is lower case, one digit end signal is sent every 9 horizontal pulses, when the character size is medium, every 18 horizontal pulses, and when the character size is upper case, one digit end signal is sent every 36 horizontal pulses). The vertical clock circuit 149 counts the number of characters corresponding to one line according to the size information of the digit signal, and upon completion of this counting, sends a scanning line end signal to the line counters 147 and 148. It is.

A blank space corresponding to 6 scanning lines is formed above the character.For medium letters, a blank space corresponding to 12 scanning lines is formed above the character.For uppercase letters, a blank space corresponding to 24 scanning lines is formed above the character. This is how it was accomplished. However, in the changing circuit 152, no special circuit is used for forming uppercase letters, and the circuit for forming middle letters is shared as is.

To explain in more detail, this change circuit 152 passes through the gate 151 and calculates the number of scanning lines corresponding to the blank space between lines (i.e., 6 for lowercase letters and 12 for medium letters) from the counter output. It includes a selection circuit that determines whether to subtract 6 or 12 depending on the subtraction circuit and size information.

For example, when printing of a certain line is completed and printing of the next line as shown in FIG. 10B is started, the line counter 147 or 148
If the output (1, 2, 3-----15) is input as is to the scanning line designation terminal of the character generator 150, a blank area will not be formed at the top of the character, so the number of scans will be the number of scanning lines corresponding to the blank area. Blanks are added until the number reaches 6.

With this configuration, the character generator has -5, -4
, −3−−−=−9, the output will be applied,
Of these, the character generator can be accessed and character outputs can be derived only when the count outputs 1, 2---9 are applied, so -5, -4--- ---
-0, 6 scan line period 1 character generator 150 counting
No character information can be obtained from this line, and therefore, this scanning line period is formed as a blank space.

FIG. 15 shows a specific example of the modification circuit 152 as described above. Here, the modification circuit 152 includes an adder 279, a lowercase complement circuit 280 that generates a complement corresponding to a scanning line of a lowercase blank space, and a A middle character complement circuit 281 that generates a complement corresponding to the scanning line of a character blank area, and a gate 2 that determines which complement circuit to select based on size information.
82, which adds the output 283 of the line counter that has passed through the gate 151 and the complement generated in accordance with the size information.

Therefore, the augend of 283 outputs exceeds 7 for lower case letters and 14 for medium letters! Since a carry is output to the output line 284 that sends out a carry, the character generation circuit 150 is activated only when this carry is present.
By forming the character signal in such a manner that the character signal is sent out, the driving of the character generating circuit is not started until a predetermined scanning line is reached from the start of a scanning line of a certain row.

On the other hand, if we explain the reading section of BF121,
The address counter 123 operates under the control of the signal line 172 from the read control circuit 131, and the information of the address indicated by the address counter 123 is applied to the gate 174. When the recorded information is standard density information, the first . The font size information of the 139th character is set to the size latch 1 similar to the size launch 138 or 139.
75, 2nd to 137th. It operates to transfer the character information of the 140th to 275th characters to a data latch 176 similar to the data latch 141.

The output of the size latch 175 is decoded by a size decoder 177 similar to the size decoders 142 and 143, but this size decoder 177 is decoded only when receiving a signal from the read control circuit 131.
is operated, and in other cases the output of the decoder 177 is controlled so as not to be derived.

The output of the decoder 177 is the vertical clock circuit 1.
a vertical clock circuit 179 similar to 49; a horizontal clock generator 180 similar to horizontal clock generator 166; Line counter 181 similar to the line counters 147, 148
, is applied to a character generating circuit similar to the character generating circuit 150 and a changing circuit 183 similar to the changing circuit 152.

Further, the output of the data latch 176 is the data latch 1
41, the signal is applied to a character generation circuit 182, and the output of this character generation circuit 182 is applied to a shift register 184 similar to the shift register 165.

In other words, while the PBF 122 has two reading sections for reduced printing, the PBF 121 has only one reading section, and the structure of each block is the same for both.

Now, if we talk about the clock generation means,
This device has a main clock generator 185 that serves as a reference for all clocks, and the high frequency (approximately 80 MHz in the embodiment) generated by this main clock generator 185 is further applied to a recording clock generator 186, A recording clock generator 186 uses a recording clock (approximately 5 MHz) obtained by counting down the main clock for recording control.

However, this countdown is not performed all the time, but is gated by the output of the beam detector 318 in the recording unit 102, and the countdown is started after this output is applied.

FIG. 11 shows the recording clock generator 186 in more detail. As shown in FIG. 1, the detection output of the beam detector 318 (shown in FIG. The signal is applied to the signal line 18g via the interface 189, and the eleventh
The R-S flip-flop 191 shown in the figure is set.

This set output is applied to the l/16 frequency divider 192, which starts counting the main clock pulses (80 MHz) as shown in FIG. 12(a), which are applied from the output line 193.
A count pulse as shown in FIG. 12C is derived on output line 194 every 16 pulses.

This counting pulse is applied to a counter 195 which derives an output when a predetermined number (200 in the embodiment) is counted, and the output of this counter 195 is further applied to a gate 196, and the output line 194 is connected to the gate 196. Connecting. Therefore, the output can be obtained from the gate 196 only after the counter 195 has counted a predetermined number N. In this embodiment, ! Since this value is set to 200, pulses after the 200th pulse will be output onto the output line 197.

The pulses on the output line 197 are further applied to a counter 198 that derives the output after counting a certain number of an (2448 pulses in the embodiment), and the output of this counter 198 is inverted and applied to the gate 199. By this,
A certain number of pulses can be obtained on the output line 200 as shown in FIG. 12e.

Here, to explain the meaning of the counts N and m of the counters 195 and 198, when recording information by scanning the photosensitive drum 308 with the laser beam 312, the position at which recording starts is determined by a certain scanning line. This must be specified very precisely. If this specification is not done accurately, the printing start position will shift from scan line to scan line. For example, if a character is drawn using multiple scan lines as shown in Figure 7, each dot will not be accurate. It appears as jitter because it is not located on a straight line in the column direction.

For this reason, when the laser beam is swung from left to right as shown in Figure 2, recording of information begins! -t+m
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Q is provided, and when the beam detector 318 detects a beam, it starts counting the clock frequency, and when this count reaches a certain number, recording starts.

Since the clock frequency used for recording is approximately 5 MHz, if this 5 MHz clock is used as is for counting, it will be as in this embodiment (although the 80 MHz clock generator 185 is not intentionally required, In the present invention, such a main clock generator 185 is used to accurately define the recording start position.That is, if 5M
If only a Hz clock generator is used and counting of this clock is started by the output of the beam detector 318, the counting start error will occur by a maximum of one clock period. This one clock means a deviation equivalent to one dot, and it means that a considerable amount of jitter appears in the printed characters. Therefore, in this embodiment, first the recording frequency is 8, which is 16 times the actual recording frequency of 5 MHz.
A clock of 0 MHz is generated, the output of the beam detector 318 is used to operate the l/16 frequency divider 19, and the output of the frequency divider is counted by the counter 195 until the count value becomes N. The intention was to start recording from the point at which

Therefore, since the counting start error occurs only by 1/16 clock cycle of the maximum recording frequency (5 MHz clock), the error is at most an amount equivalent to 1716 dots, which is a sufficient range of error for practical use. It is.

As is clear from the above explanation, the N determines the printing start position (left margin) on the scanning line, so by making the counted value N of the counter 195 variable, the left margin on the recording paper can be adjusted. It is possible to perform 211 adjustments.

Note that instead of making the count value N of the counter 195 variable, as shown in FIG. is applied to the comparator 202, and the comparator 202 determines whether the two outputs match,
Of course, it is also possible to output an output to the output line 204 if they match.

The count value M of the counter 198 determines the position on one scanning line at which information recording should end, and in the case of medium-sized characters, the space for one character is 18 dots, and such characters are placed in one line. Since it can record 136 characters, this is to stop sending out the clock for recording control when the scanning line moves from the recording start position by 18 x 136 = 2448 dots (same for lowercase and uppercase letters). It is.

Note that in FIG. 12, C' is the same as C, only the time axis has been changed. 6.1t-Circuit shown in FIG.

The set output of the flipflop 191 is applied to the reset input, and the output of the counter 198 is applied to the delay circuit 2 with a delay time τ.
Flip-flop 2 connected to the set input via 86
Although it has 85.

The set output of this flip-flop 285 is shown in FIG.
As soon as the beam detector gains detection power, the level changes from high to low, and after the time τ has passed since the recording of information is completed, (this τ is the last character of the line where the laser beam is located) After recording, the level changes from a low level to a high level (which is sufficient time to leave the recording area of the recording medium, in this case the area defined by A4 size).

In this embodiment, the output of the shift register 184 or 165 applied to the video information generator 287 and the control signal as shown in FIG. , is applied to the modulator 303. Applying not only the output of the shift register but also the control signal to the modulator in this way suppresses the beam from being irradiated onto the recording area of the photosensitive drum except when drawing characters, and
The beam detector is used to excite (unsuppress) the beam so that it can be detected.

In this embodiment, a beam detector 318 is used to detect the position of the beam, and the beam position detector 318 is arranged in a positional relationship with the photosensitive drum (recording paper) as shown in FIG. It is what it is.

That is, the area indicated by the width W on the photosensitive drum 308 is the area to be transferred to the transfer material (recording paper), and the beam 312 travels along the straight line indicated by the dotted line in the direction of the arrow H in the figure. Assuming that scanning is performed repeatedly in the direction, the beam detector 318 is arranged at a position where it can detect a beam located further to the left of the beam 312-1 located at the left end of the radiation W. If the beam detector is fixedly installed in this way and the beam deflection speed is kept constant, the position of the beam can be accurately determined by starting counting at a constant clock frequency from the time the beam is detected. It is something that can be done.

Therefore, as explained in detail in the embodiment, the beam can be modulated based on information corresponding to the beam position, and characters can be recorded.

In FIG. 21, if the width V is the area to be recorded, then (a modulation signal is applied to the modulator based on the PBF information only when the beam scans this area) dL, dR
are the left margin and right margin spaces on the recording paper, and the configuration must be such that such areas are not irradiated with the beam.

In the present invention, a flip-flop 285 as shown in FIG. 11 is provided for this purpose, a control signal as shown in FIG. 12g is obtained from this flip-flop, and this control signal and PB
The modulator is modulated by the logic output with the information from F. To further explain with reference to FIG. 21, after the beam detector 318 detects the beam, The beam is controlled by both a control signal such as turning off the beam and a character signal from the PBF during the width V until after 1 hour (this τ is longer than the time the beam reaches the right end of the width W). It is something to do.

Therefore, the beam is controlled to be OFF in the sections dL and dR, and the beam for drawing characters is irradiated only during the width V.

As described above, in this embodiment, the beam position is detected by the beam detection output, and the use of such a beam detector makes it extremely easy to manufacture the rotating polygon mirror 305.

That is, the position of the beam can be detected by detecting the rotation of the motor 306 as in the conventional method, but if such a method is used, the processing accuracy of the polygon mirror must be extremely strict. However, by providing a beam detector as described above and using the detection output to start clock counting and detecting the beam position based on the counted contents, the accuracy of the polygon mirror is about 10 times lower than conventional methods. It is something that will not cause any inconvenience.

Moreover, specifically, since the recording clock is created by a frequency divider triggered by the beam detection output, the recording clock can be created at a stable frequency and at low cost. be.

Now, to explain a part that has not been explained in the drawings so far, the reference numeral 217 in FIG. 1 is an operation panel, and on this panel there is a switch 290 for specifying an ID number. , a switch 291 for specifying a negative value in the ID, a search command switch for specifying a search for a corresponding location on the magnetic tape based on the above-mentioned input, a start/stop switch 293, a set switch 294 for setting the number of copies per sheet. Number of sheets automatic/manual changeover switch 295. It has a reduced printing control switch 296 including a normal printing command switch, a reduced printing command switch, and an automatic mode switch, and a power switch 297.

Furthermore, in FIG. 1, numeral 289 indicates a three-phase lock generator that generates a clock for sequential control.

In FIG. 11, a terminal 288 is a terminal for obtaining a down-stepped clock signal, and is used as a clock for reading size information into a size latch.

Since the outline of the configuration of the recording apparatus according to the invention has been explained above, the operation during actual use will be described in detail below.

Before use, print control unit 1 of recording unit) 102
Turn on the power switch 220 provided at the laser oscillator 87 to enable the recording unit.
1, by keeping the switch 220 always on regardless of the switch 220, there is no need to waste the transition time for the rise of the laser oscillator 301. ) Next, turn on the power switch on the operation panel 219 to put the control unit 101 into a standby state.When recording the output of the information providing unit 100 according to the control signal sent from the unit, When the start switch 293 is pressed, this switch signal is applied to the main control circuit 130, a start signal is formed, and the magnetic tape control circuit 10
4, a control signal for a certain program is read from the tape in the delivery unit 100, and stored in the instruction registers 115 to 119, respectively.

Also, as described above, if you do not press the start switch directly but specify an ID before pressing the search command switch 292, this ID information is stored in the main control circuit 130 and the comparator 2
25, the content of the ID register 115 is compared with the content of the ID register 115, and only the tape is moved until the two match, at which point the tape is stopped.

Further, the number of copies can be specified using a switch, but the automatic-manual switch 295 can be used to select whether to determine the number of copies based on the information in the multi-register 116 or to give priority to the number entered from the panel. It is something that has been formed.

As mentioned above, the control signals read into each of the mode, function, and reduced print registers are discriminated to determine which PBF should store the character information. When the character information to which it belongs is variable data and the reduced print control signal indicates that it should be printed normally, the write control circuit 128 controls the gate 120 and the address counter 24,
The character information (including character size information) of this first page is stored in the PBF 122-1. When writing of the character information on the first page is completed, a completion signal is applied from the write control circuit 126 to the main control circuit 130, and the circuit 130
A read stop command is given to the magnetic tape control circuit 104 to stop reading data.

The main control circuit 130 also sends a completion signal to notify that writing to the PBF 122-1 has been completed! Upon acceptance of the issue, a read command is given to the read control circuit 131, which controls the address counter 24 and starts reading out the information in the first row of the first page of the stored information. Here, in the first line, enter "Medium font size" and
, B, C----N and 136 character codes are stored, the read control circuit 131 determines the contents of the registers 117, 118, 119, and applies size information to the size latch 138. A control signal is applied to gate 137 in order to do so. The data thus stored in the size latch is decoded by decoder 142, and this decoded information is applied to the clock generator and counter to control them. At this time, the signal line 144,
Since no reduction command signal is applied to 145, the medium character size information is decoded as the medium character size. That is, the vertical clock generator 149 is configured to derive a digit end signal every 18 horizontal clock pulses, and the number of clocks included in the recording area of one scanning line, in this embodiment, 24.
The line counter 147 outputs the scanning line end signal every time it counts 48 clocks, which corresponds to 136 characters in terms of characters. In the case of a medium character, a line end signal is output every 30 counts and applied to the control circuit 131, the character generation circuit 150 is configured to select a medium character, and the register 279 of the change circuit 152 is set to "12". It is controlled so that the complement of is applied from the middle character complement circuit 281.

Once the reading of the size information is completed, the coded information of the first character, A, is read out, but prior to reading out.

Since the counters 2o5゜206 of the address counter 124 are cleared, data A is read from the PBF 122-1 into the data latch 141 with the first clock pulse obtained from the output line 200 in FIG. 11, and this read information is used to generate characters. The voltage is applied to the middle character terminal 156 of the device 141.

At this time, the line counter 147 is cleared and remains at "1".

Therefore, a signal instructing the first scanning line is applied to the output line 159 of the character generator 154, but as is clear from FIG.
Carry is character generator 1 because the complement from
Therefore, "°O" is output from Di-Di4 of the dot output line 158 in FIG. Furthermore, since the empty interior forming circuit 167 operates, the dot output line D15.

"0" is also applied to Di8, and as a result, O is set in the first to eighteenth stages of the shift register 65 (the read side is the first stage). At the same time as this setting, the signal of the first stage is read out and applied as a modulation signal to the modulator 303, but the beam is blocked and does not reach the photosensitive drum. It is assumed that the signal is cut off when 1 signal is applied, and passes when 1 signal is applied.

□sec after this state is reached, the seam dot arrives at the next dot position and the horizontal clock is applied to the shift register 65. In this way, 1
Even if the dot position and the beam advance, the control signals sent and received between each circuit block.

No change appears, therefore shift register 165
The "0" of the second stage of is read out and applied to the modulator. When the scanning of the section corresponding to 18 dots is completed in this way, the counter B (1
6rI! J), the digit end signal is read from the read control circuit 131.
is applied to terminal 215 of address counter 124 via
The output becomes "l", and control is performed to read out the second character in the first line of the first page of the PBF 122-1 at address 1. Incidentally, since the size information is still held in the size latch, the aforementioned various ports controlled by the size information remain in the state as described above.

In this way, the code information of the second character "B" is applied to the character generation circuit 150, but "0" is stored in the first stage j to the 18th stage of the shift register 165 in the same manner as described above. , these are read out together with horizontal pulses to modulate a laser beam moving in synchronization with the horizontal clock.

In this way, when the reading of the 136th character is completed, the vertical clock circuit 149 as shown in FIG.
A scanning line completion signal is applied to the line counter 147 from the counter A included in the address counter 147, and its content becomes "2" (meaning the second scanning line), and a scanning line completion signal is applied to the terminal 216 of the address counter 124. Then, the content of the counter 206 is set to "O". At this time, since the content of the counter 205 remains O, reading of the character information of the first character of the first line is started again. Since the size information remains as read when reading out the first scanning line, the contents of the circuit to be controlled by the size information do not change, but only the contents of the line counter 147 change from 1 to 2. .

Similarly to the first scanning line, the second scanning line sequentially reads one line of character information, and when the last N characters are read and the scanning is completed, the scanning line 4i Jik is again superimposed and programmed. The signal is applied to the road number 1 bell counter 147.

When the reading of the characters on the first line is repeated in this way and the reading of the information regarding the sixth scanning line is completed (that is, when the reading of the characters on the first line is completed six times), a line scanning end signal is sent to the line counter 147. is applied to change its contents from 6 to 7. After that, the seventh reading starts, but in this state, as mentioned above, in the case of a medium character, the carry is applied to the character generation circuit from the adder 279 in FIG. The output of is the first in the character generator.
Since the first line instruction signal indicating the line is applied, when the first character "A" is read out, ooooooottoooo is output to D1-014 of the character generation circuit.

(The arrow indicates the read direction of the shift register 165)
is derived and transferred to the shift register, and D15
Since “0” is transferred to ~018 as described above, Di
-018 except for D7.8 is "O".Continue reading the second character B and third character C in the same way.

When the 136th N is read out, the content of the line counter 147 is set to 8, and then the process returns to reading out the first character to form the 8th scanning line. During this scanning, a second line instruction signal is applied to the character generation circuit 150.

When the 30th reading related to the 30th scanning line is completed in this way, the 30th scanning line end signal is applied from the vertical clock circuit 149 to the line counter 147, but as described above, In the case of a medium character, this line counter 147 is reset by counting the scanning line end signal to 30 and applies a line end signal to the readout control circuit 131. This row end signal applied to terminal 212 causes the contents of reference counter 205 to be
By transferring this count output to the upper digit of the register 207, the output of the register 207 is set to 138. (Since the scanning line completion signal is always applied together with the row completion signal, the contents of the register 217 are O).

Therefore, the content of the address counter 124 is 138, which instructs the reading of the first information on the second line, that is, the size information.

Therefore, first, the size information is sent to the size launch 13 in the same way as above.
8, repeat the reading of the second line in the same manner as described for reading the first line, and assuming that the second line is also a medium character, the second line is read with 30 scanning lines as before. It is completed with the eye.

By repeating such scanning, when all reading of the 66th line is completed, the readout of the page end signal stored in the last character of the 66th line is ANDed by the line completion signal from the line counter 147. The read control circuit detects the end of one page and stops reading from the PBF 122-1.

When such a stop is detected, reading of the next page from the magnetic tape is started again, and information is read from the PBF and recorded as described above.

Above, we talked about the case of medium letters, but in the case of uppercase letters,
The size information read by the size launch 138 and decoded by the decoder 142 is applied to the gate A of the horizontal clock generator 166 as shown in FIG. Each time a clock circuit derives a line end signal every horizontal clock 18 (same as for medium letters), the vertical clock generator 149 is controlled and the vertical clock generator 1
49, the character generating circuit 150.49 controls the character generating circuit 150. The conversion circuit 152 is also controlled in the same way as in the case of medium letters, but as shown in FIG. 18, when the line counter 47 receives uppercase letter size information,
2 by controlling gate B and allowing it to pass through the da circuit.
Control is performed so that the count is incremented by one upon receiving one scanning line completion signal.

That is, by multiplying the clock frequency applied to the shift register 165 by 1/2 in the column direction, and by doubling the count of the line counter 147 in the row direction, one dot obtained when a medium character is displayed in the column. The dots are read out twice in the direction and twice in the row direction for a total of four dots.

For example, as mentioned above, 1 called A, B --------N
To describe the case where information consisting of 33 lines with 68 characters is read out and recorded, after reading out the size information, the first character A in the first row is read out to the data latch 141, and in the case of a medium character ' Similarly, "O" is transferred from the character generation circuit 150 from the first stage to the 18th stage of the shift register 165.

At the same time as this transfer, O is read from the first stage of the shift register 165 and the modulator 303 is set to fm, but since the shift pulse of the shift register 165 has been stepped down to 1/2 the frequency, the laser beam is shifted to the second dot. Even when the laser beam reaches the position of the 3rd dot, the shift register 165 is not shifted like in the case of the medium character and continues to read the information of the 1st stage.When the 0th order laser beam arrives at the position of the 3rd dot, For the first time, a shift pulse is applied to the shift register 165 to perform second stage reading. When one character is read out in this manner, a digit end signal is derived from the two-shot vertical clock circuit 149 during that time (because the same circuit as that used for medium characters is used).

Continuing to read the first row in this way, when the 68th and last character is read, the 136th digit end signal is sent, and the vertical clock circuit 149 sends a scanning line end signal to the line counter 147. However, when uppercase character size information is applied, this line counter is incremented by 1 only when two scanning line end signals are received, so its contents do not change.

The signal instructing the first scan is still derived.

Therefore, when performing the second readout after the first readout of the first row, the same information as the first scan is read out, and the laser beam is scanning the second scan position. Therefore, in the case of uppercase letters, Figure 7 B and C
As is clear from the figure, one dot of a Chinese character is read four times as many times.

In addition, in case of upper case size, 70th to 137th degree, 207th degree
~275 characters are not read.

Next, taking high-density information as an example to record lowercase letters, when the write control circuit 126 determines that the information is high-density information, it controls the game 120 to change the size and character information to the PBF 122. control so that one page of high-density information is sequentially written to all PBF '122-1 to 4 (high-density information has four times the amount of information as the standard density). Because there is).

Once the information is recorded in the PBF in this way, reading is then instructed, but as in the case of uppercase letters, the size information is first stored in the size latch 138,
The decoded lowercase letter size information is decoded by the decoder 142 and controls the vertical clock generator 166 such that a digit end signal is derived from the vertical clock generator 149 every 9 clocks, and the line counter 147 As shown in FIG. 18, the conversion circuit 15 applies a row completion signal to the readout control circuit 131 at the 15th scanning line end signal.
2 controls the gate 282 so that the 6's complement number is derived from the lowercase character complement circuit 280, and controls the selection circuit 157 of the character generation circuit 150 so that character information is applied to the lowercase character generation terminal. From D8. “0” in D9
As the signal is applied, and with the signal being high density information.

The address counter 124 is controlled to count up by 276 in response to the row completion signal.

Although the figure does not show the address register with 276 counts in detail, it has a reference counter 205 in the register 207 and a relative register 206 in the register 207.
Similarly, a high-density reference counter and a relative counter that further increase the count by 276 are provided, and when it is determined that the density is high, these two counters are added to the counter 205.2.
It is only necessary to configure it so that it can be used by switching to 06.

Assuming that the character information in the first line of the page with this high-density information to be printed is "A, B----N", after reading out the size information as described above, the first character A is read out. This information is applied to the character generator 154, and O is applied to D1 to D7 of the shift register 165 (conversion circuit 152
), and D8. O'' is derived from D9 as described above, so 0'' is sent to the shift register 165 at the 1st to 9th stages.
is stored and sequentially read out by printing on a horizontal clock, and the laser beam moving in synchronization with this clock is modulated by the information read out from the shift register.

At the end of the 9th horizontal clock, a digit end signal is successively applied to the address counter 124 via the control circuit 131, so the content of the relative counter is counted up by one, and the second
Commands to read the th character. Based on this command, the second character is read out in the same manner as described above. When the 272nd character has been read in this manner, a scanning line end signal is sent from the vertical clock circuit 149 to the line counter 147, and is also sent to the address counter 124 via the read control circuit 131 to clear the relative counter. , again commands the reading of the first character of the first row.

When the 15th reading of the character information on the first row is completed in this way, a row completion signal is sent from the line counter 147 to the address counter 124 via the read control circuit 131.
is applied to the register 20 with the contents of the reference counter as 1.
The contents of 7 are advanced by 276, and the contents of the address counter are advanced by the number of characters corresponding to one line. Therefore, the address counter 124 indicates the address of the first character on the second line.

By repeating the above reading, the last reading of the 132nd row is completed, and the row completion signal is output to the line counter 147.
The end of one page is detected by detecting that the above-mentioned page end signal has been read out.

Above, we have explained in detail the case of using PBF122-1 for printing large, medium and small characters, but as explained in the eight combinations of control signals explained earlier,
When reading fixed data from the PBF 121 using the address counter 123, from the PBF 122-2 to 4, the reduced printing jii'I"7Fyxi2yl1251Jll°'C*
hy'-.

When reading out the data, each data is read out in the same manner as described above.

[Reduced printing mode] Next, the reduced printing (bag-stitch printing) mode will be described in detail. As outlined in Figure 9C, this reduced printing is to print four pages of information on one page of recording paper, and in this figure, all pages A and all pages are printed on PBF122-1 to PBF122-4, respectively. This shows the case where information for page B, all pages C9, and all pages is stored.

On the magnetic tape, all pages with medium letters A in the nth block
However, the n+1 block stores information for all pages B in uppercase letters, the n+2 block stores information for all pages C in uppercase letters, and the n+3 block stores information for all pages in medium letters, and the control signal for each page instructs reduced printing. If so, when reading information from the magnetic tape, the write control circuit 126 detects this reduction printing command and transfers the nth block to the PBF 122-1.
+1 block to PBF 122-2, n+2 block to PBF1 22-3, and n+3 block to PBF122-2.
Address counter 124 as stored in F122-4
control. (The address counter 125 is read-only.) However, the block referred to here is the one in which the first code of the control signal is removed. Reading starts after waiting for the end of such writing, but address counter 1
Since address counter 25 can be used only for reading out PBFs 122-3 and 122-4, address counter 124 is used only for reading out PBFs 122-1 and 122-2 during reduced printing. In the case of reduced printing, as can be seen from Figure 9C, one scanning line writes information for two pages, and the next page of this page, in the figure, between A and C, or between B and D. Since there is no special blank space, when recording character information located on the right side in the figure.

There is not enough time to read out the size information.

Therefore, in this embodiment, in the case of the above-mentioned bag binding printing, etc., the beam detector 31 is included in the readout control circuit 131 and the beam detector 31
Before the beam records information, a counter C counts a 5 MHz recording clock (the waveform of which is shown in Figure 12f), which corresponds to the period from when the output of 8 is applied until the beam leaves the recording position. A clock having a time of 137, size latch 1
This size information is stored in 39.

The information stored in the size latch 139 in this way is decoded by the decoder 143, but the information stored in the size latch 139 is
Since the reduced printing command signal is applied to the upper part of the line counter 148, the size information actually taken in by the decoder 143 is decoded as a medium character, which is the size of one row lower, even though the size information is actually taken in by the decoder 143. is controlled as described above according to the medium character information.

Next, a clock pulse CP following the aforementioned clock pulse
2, the size information in the first row of the PBF 122-1 is read out, and at the same time, the gate 137 is controlled and the size information is stored in the size latch 138. This size information is decoded by the decoder 142, but since a reduction command signal is applied from the signal line 144, the read information is medium letters, but it is decoded as lowercase letters, and the line counter 147 is controlled according to lowercase information.

Once the size information is read in this way, the character information of the first character in the first row is read directly into the PBF 122-1 into the data latch 141, and the read control circuit 131 controls the gate 145 to send the character information to the decoder 142. The lowercase character size information is applied to the horizontal clock generator 166, conversion circuit 1521, and character generation circuit 150 to control each of them in the same manner as in the case of lowercase character printing described above. However, in this case, unlike the case of high-density information, one line (2448
Kurotsuku) in the middle! −The line ends, so
In other words, since the printing of a certain line of the page is completed at the 1224th clock after the start of printing, the counter C included in the write control circuit 126 determines that 1224 clocks after the start of printing By detecting the clock number and applying this clock CF2 of FIG. .

In this way, reading of the first row of the PBF 122-3 is started, and at the same time as this reading starts, the gate 145 transmits the size information of the decoder 143 to the signal line 144.
Since the horizontal clock circuit 149, the conversion circuit 152, and the character generation circuit 150 are controlled in accordance with the size information.

Therefore, by sequentially reading out the character information to the data latch 141, the information is recorded sequentially in medium characters.

When the scanning of the first scanning line of the first row of PBF 122-3 is completed in this way, a scanning line end signal is applied to the vertical clock circuit 149 and the line counter 147, 148, and 42/7 n) East exit -h Inside So Mehi 1
↓ O b 71 rip ρ + soot, h)
1 only arc. Since the scanning line end signal is applied as a signal to clear the relative counters of the respective address counters 124 and 125, the initial addresses of the respective counters are returned to their initial states.

Therefore, from PBF122-1 again, the second
Read the information for the second time, and then PBF122-3
The second read of the information in the first row is performed,
This reading will be continued below. When the reading of the 15th scanning line is completed in this way, the line counter 147 outputs the row completion signal by applying the scanning line completion signal.
Address counter 12 via read control circuit 131
4, the count is increased by 138, the number of characters corresponding to one line, and the read designation address is specified as the first character of the second line. At this time, the line counter 148 remains in the same state.

In reduced printing, the PBF 122 is configured so that there is no lowercase character size as size information (if it exists, it is not recorded as an error), so the address register is controlled in advance so that the line completion signal increases by 138 a total.
Therefore, in the scanning of the 16th scanning line, PBF1
The information on the second line is read from 22-1, and the PBF122
From -3 onwards, the information on the first line is read out.

When the scanning of the 990th scanning line is completed in this way (printing of the first and third pages is completed at this point), a scanning line completion signal is applied to the line counters 147 and 148, respectively. A row completion signal is applied from each counter to the address counters 124 and 125, and the address counters PB
Specify the first address of the first line of F122-2, 122-4.

That is, since the addresses of the PBF 122 are consecutively provided from 122-1 to 122-4, it is possible to start reading the information of the next page by simply advancing the address by one line in each PBF. be.

In the explanation above, PBF122 is used for M printing.
- One page of information was stored in each of numbers 1 to 4, and a total of four pages of information was recorded on one page of recording paper. If it is on tape 1, four pages are read out onto the PBF, but even if there are fewer than four pages, reduced printing can be executed at the end of the program. For example, if there are three pages left in the program, the information for these three pages is read into PBF122-1 to PBF122-3, and when the 276 character of the 34th record of the third page notifies the end of the program, the remaining PBF122
In 2-4, L is automatically inserted as the character size and an invalid code is inserted as the character information.

By inserting invalid code like this, PBF12
Previously held at 2-4! Since the remaining information is erased, a reduced print of three pages and a blank page of one page are formed on the recording paper.

In order to insert the invalid code in this way, write control circuit 1
26 is provided with an invalid code generator, and when the end of the program is detected, the write control circuit 126 sends an invalid code to the distributor 108.
A code signal is applied to the PBF 122-4, and this signal is written to the PBF 122-4 via the gate.

As described above, according to this embodiment, even if four pages of information are not stored at the end of the program, the invalid code can be inserted into the remaining portion and reduced printing can be executed.

[Overlapping Printing] Next, overlapping printing in which two pieces of character information are read out simultaneously, a beam is modulated by the read information, and the two pieces of information are printed in an overlapping manner will be described in detail.

As mentioned before, in this example, PBF121
and 122, and each has an address counter for independent access, so information can be read from both PBFs at the same time. Up to now, only all records have been described in detail, but as mentioned earlier, if the function indicates fixed data in the data read from the magnetic tape, the write control circuit 126 determines this. , character and size information of the data are stored in the PBF 121.

When instructing that the data read in such a state is modulation data, this fluctuation data is stored in the PBF 122, but the read control circuit 131 determines whether or not this fluctuation data indicates superimposition. is detected by determining the contents of the function register 118, and when superposition is not instructed, only the fluctuation data of PBF122 is read out, and when superposition is instructed, the contents of PBF121 and PBF122 are read out at the same time. It is something.

For the sake of simplicity, assuming that standard density information is stored in the PBF and PBF 122-1, the address counters 123 and 124 start reading simultaneously and synchronously by reading the superimposition command in the read control circuit 131, It operates in the same manner as described above, stores information in shift registers 184 and 165, and
The information in the two shift registers is read out synchronously, and an OR output of the read output is formed by a video information generator.
Since the modulator is controlled by this OR output, the laser beam modulator is driven by the OR output of both PBFs. In addition, here PBF121, PBF12
Although the individual information reading from 2-1 will not be explained, the reading operation itself is exactly the same as the operation described previously, and differs only in that the scanning lines and dots are read out at the same time in synchronization. However, such control is achieved by simultaneously applying control signals to gates 174 and 137, and by applying control signals to horizontal clock generators 166 and 18.
This can be done by receiving the same clock signal from the recording clock generator.

FIG. 19 illustrates the above-mentioned superposition. For example, the PBF 121 stores a capital letter A only in the first character of the first line, as shown by a, and the PBF 12
Assuming that 2-1 stores information such as B in middle letters except for the second character of the first line, and does not use the first line, as shown by b, due to superposition, The OR output of both PBFs as shown by C, i.e., the first row consists of days A13, BB..., and the other lines consist of days 88, B... ...It is possible to obtain a record consisting of days.

Note that superimposition can be performed not only in normal printing as in the above example but also in reduced printing.

However, in this case, change the font size of PBF121 to medium when it is an uppercase letter and to small when it is a medium letter.

The readout control circuit 131 controls the decoder 117 so as to convert it into characters, and reads the PBF 121 in synchronization with each of the PBFs 132-1 to 4, that is, the first scanning line of the first row of the PBF 122-1. The first scanning line of the first row of PBF 121 is read out in synchronization with the reading, and then the first scanning line of the first row of PBF 121 is read out in synchronization with the reading of the first scanning line of the first row of PBF 122-3. First, the second scanning line of the first row of the PBF 121 is read in synchronization with the reading of the second scanning line of the M1 row of the PBF 122-1, and so on. The output modulates the modulator.

FIG. 20 illustrates overlapping printing in the case of reduced printing as described above, for example.

PBFL21 has a capital letter A in the first character of the first line, and PBF
If each of 122-1 to 122-4 stores uppercase letters B, C, D, and E except for the 7th character in the 1st line, then the 20th
As shown in the figure, A is inserted and recorded as the first character of the first line of the content of page 4.

In the above embodiment, the OR of the reset output of the flip-flop 285 and the output of the shift register 165 or 180 is applied to the modulator 303. However, if the set output is derived from the flip-flop 285, this set output and the shift register 16
5 or 180 output from the modulator 3.
It is sufficient to apply it to 03.

The point is that it is sufficient to modulate the modulator 303 using the logical outputs of both. Further, in the above embodiment, the counter 195 or a circuit as shown in FIG. 13 is used as a means for defining the left margin, but such a counter is necessary because it operates as a timer. The same effect can be obtained by replacing the timer with a timer that is formed by a timing circuit and derives a timed output after a certain period of time from the arrival of the trigger manual signal.

In such a case, in FIG. 11, the counter 195 is removed, the set output of the flip-flop 191 is used as a trigger manual signal, and a timer including a time constant circuit is provided to apply the timing output to the AND gate 195.
It is only necessary to take the fixed time equal to the time for the counter 195 to count a fixed number of pulses from the frequency divider 192, and the time constant of the timer including the time constant circuit can be changed. By keeping
Of course, the same effect as when the count value of the counter 195 is made variable can be obtained.

In addition, in the above embodiment, the 80MHz main clock is
Although the frequency divider 192 that steps down to MHz is driven by the output of the beam detector 318 to detect the position of the moving object, the present invention is not limited to this embodiment. 5 that resonates with the MHz main clock
A locked oscillator having a MHz resonant circuit may be activated by the output of the beam detector 318. In addition to detecting the beam position in this manner, the position of other moving bodies such as a recording needle can also be detected in the same manner.

As described above, the information recording apparatus according to the present invention simultaneously prints odd-numbered pages and even-numbered pages during bag-stitch printing, thereby making it possible to print at high speed with fewer line breaks.

Also, at the beginning of one line, the font size information of the line is read, and this read font size information is used for at least 1 line constituting the line.
Since it is configured to hold the scanning line period, it is possible to simplify the apparatus.

In addition, in this embodiment, only a laser beam is exemplified as a recording means for scanning a recording medium, but the present invention is not limited to such a recording means, and may include recording means such as a discharge recording needle. Of course.

[Brief explanation of the drawing]

Figures A, B, and C are recording devices to which the present invention is applied! FIG. 2 is a perspective view showing an overview of the recording unit in FIG. 1, FIG. 3 is a perspective view showing the actual configuration of the recording unit, and FIG. 4 shows the recording system of the recording unit. Side view of the main parts of the
) is an explanatory diagram showing the relationship between the surface potential of the photosensitive drum and the AC static neutralization time, FIG. 6 is an equivalent circuit diagram of the main part of the recording unit,
$7 Figures A, B, and C are explanatory diagrams showing characters formed on a recording medium, and Figures 8 A and B are block lines showing further details of a character generation circuit to explain how information is recorded on a magnetic tape. Figure 1B is an explanatory diagram showing the characters formed by the beam in more detail, Figure it is a block diagram showing the recording clock generator in Figure 1 in more detail, and Figure 12 is the recording clock generator. 13 is a block diagram showing another embodiment of the counter 195 in FIG. 11, FIG. 14 is a block diagram showing the address counter 124 in FIG. 1 in more detail, Fig. 15 is a block diagram showing the changed circuit in Fig. 1 in more detail, and Fig. 16 is a block diagram showing the modified circuit in Fig. 1. , 17th
18 is a block diagram showing the horizontal clock generator in FIG. 1 in more detail, FIG. 18 is a block diagram showing the line counter in FIG. 1 in more detail, and FIGS.
The figure is an explanatory diagram to explain overprinting, Figure 21 is a top view of the main part of the recording unit to explain beam irradiation in the recording unit, and Figure 22 is an arrangement showing the arrangement of Figures A, B, and C in Figure 1. It is a diagram. Here, 100 is an information supply unit, 101 is a control unit, 121 and 122 are page/(Zuffa registers, 12
3, 124, 125 are address registers, 126 is a write control circuit, 131 is a read control circuit, 138, 139
, 175 are size latches, 142, 143, 177 are decoders, 147, 148, 181 are line counters, 150
, 182 is a character generation circuit, 165° 184 is a shift register, 166.180 is a horizontal clock generator, 147,
148 and 181 are line counters, and 186 is a recording clock generation circuit. Patent applicant: Canon Corporation Y45 Figure 6 Figure 7 Figure 7 Mine? A O3 $1 OriJ Ha No. 14 (I No. 151 8c!

Claims (1)

[Claims] In a device that edits the contents of a memory and prints the contents spanning multiple pages, a printing means for printing information on the same line on odd and even pages; 1. An information recording apparatus comprising: control means for advancing addresses in the memory by one line each to control the printing means so as to print continuously without interruption.