JPS5862964A - Picture transmission system - Google Patents

Abstract

PURPOSE:To receive a light beam to a prescribed level of a picture storage section at all times and to surely reproduce a picture signal, by changing the intensity of light beam used as the picture signal irradiated from a picture reading section depending on the communicating distance. CONSTITUTION:Original sheets are read with image sensors of reading sections 100-1-100-3 arranged scatteringly, the read data are converted into picture data of reading time series, the data are pulse-modulated at a modulation circuit and applied to light emitting sections 500-1-500-3. The light from a light emitting element 501 of the section 500 is collected at a lens 502, applied to a photodetection section 700 as an optical beam, the light beam Lt is converted into an electric signal at a photodetector 701 to reproduce an FM signal FMS. This signal is applied to a recording section 300 via a coaxial cable 900. The picture data, a write control clock and instruction data are picked up from the signal FMS at the recording section 300, and specified pictures can surely be reproduced based on the respective signals.

Description

[Detailed Description of the Invention] The present invention relates to an image transmission system, and in particular to H
Image transmission method suitable for image transmission When the image reading section and the image recording section are separated and the image signal read by the reading section is supplied to the recording section via a predetermined transmission path to perform recording. There is a need for a transmission method that enables high-speed communication and reliably reproduces image signals.

Therefore, we proposed a method of pulse-frequency modulating the image signal read by the image reading section, forming a light beam based on this modulated image signal, and transmitting the image to II[IIB by this light beam. Even if a light beam of a predetermined intensity is irradiated toward the recording section, if the recording section is located far away, the reception level of the light beam incident on the recording section will decrease, making it difficult to reliably receive the li image signal. There is a fear that it will not be reproduced in the future. At that time, there is a method of expanding the light-receiving area to maintain a constant light-receiving level, but this method has the disadvantage that the frequency characteristics deteriorate.

In view of the above, an object of the present invention is to make it possible to change the intensity of a light beam as an image signal emitted from an image reading section depending on the communication distance, etc., so that the light beam is always at a predetermined level in the WR image recording section. An object of the present invention is to provide an image transmission system that can receive light and reliably reproduce image signals.

The present invention will be described in detail below with reference to two drawings.

Figure 1 and Figure @J show an example of an image transmission device to which the present invention is applied, where 1oo-i, too-co.

100-3 is distributed 11':! The image of the sheet-like original is transferred to a one-dimensional solid-state image sensor, such as a COD.
It is read by a line image sensor and converted into time series image data TDA. The following theory f! At A, the reading unit 10
0-/, /DOSU, and 100-J are collectively referred to as too.

Command data C for quantizing this image data rim and performing this image data VD and recording @ JOOt) operation.
D is supplied to a modulation circuit within the reader 5100, and predetermined interlock signals are pulse frequency modulated (or MFM) with these signals (hereinafter collectively referred to as "data signals@DB"). The output signal of the pulse frequency modulation circuit, that is, the pulse IM signal IFM8t-light transmitting section-00-/.

zoo-1,! DO-3C and below, these are collectively referred to as zoo), and the built-in light emitting element! O11
For example, it drives a light emitting diode, a laser diode, etc. i.e.% 2nd a! ! As shown, the light emitting element zoi
The light emitted from the lens 102 is focused into a light beam Lt.
Then, the percentage of light received when this light beam Lt is attached to the ceiling, etc.
Supply to 700.

Tatami light ill 700K Built-in light receiving element 70
/ For example, an avalanche photodiode converts the intensity of the light beam Lt into an electrical signal and reproduces the above-mentioned I pulse FM signal FM8. This signal PM8 is supplied to the recording section 300 via the coaxial coupe A/900. The recording unit 300 extracts image data VD, write control clock WCK, and command data CD from the supplied pulse rM signal FM8. The recording unit 100 performs a predetermined image recording operation based on each of these signals.

FIG. 3 shows an example of the reading mechanism of the reading 16/DO, where 10/ is a sheet original, and '102 and 103 are original 1.
0/ in the direction of arrow B. Reference numeral 1044 is a platen provided on the document feeding path, and images of the lower surface of the document 101 passing through the platen are successively read. The toy is a document feed guide that holds down the original @10/ to form a well-focused image.

Reference numerals 106 and 107 are document position detection means for detecting the paper edge of the document 10/, which detects the point in time when the fed document rotO paper edge obstructs the progress of light from the light emitting element 106 to the light receiving element 107. This detection signal is used to control the recording section 300.

/DI is a rod-shaped light source for document illumination, such as a halogen lamp, and irradiates the reading section fILA of the shutter 104c from below. toy is a folding mirror, and /10 is an imaging lens, which folds back the image light Lr reflected by the source 101 passing through the reading position M, as shown in the figure.

It functions to image the image light Lr on the receiving surface of the COD line image sensor ///. This CCD line,
The image sensor finally converts the imaged image light Lr into time-series image data VDAKl! of a predetermined number of bits.

The diagram shows the recording mechanism of the recording unit 100, and here JO/
is the first recording mechanism, and JO/B is the second recording mechanism. In this first embodiment, the structures of the two recording mechanisms 30/A and 30/B are exactly the same, and the symbol [-1otJ only I! l Recording mechanism and second
A symbol "mu" or "B" is attached to distinguish the recording mechanism from the recording Ia structure, and the same symbol is attached to the detailed reference numeral for each recording mechanism for all records.

The i/recording mechanism 30/mu and the IIJ recording mechanism 10/B are each equipped with two recording heads, for example, inkjet heads 3Qλ and 303. Each inkjet head is a full-line inkjet head in which a plurality of recording elements are arranged in a straight line in a direction perpendicular to one surface of the reference material, and is driven according to image data TDA from a CCD 9 in-image sensor. record. In this example, 30 inkjet heads perform black normal mode recording at 11 dots/W, and 10 C inkjet heads perform black normal mode recording.
3 shall perform 1 trit/mO red normal mode recording.

Each recording mechanism Q! 0/A and 10/B are vertically stacked in two stages by a support (not shown).

Jag is the recording paper storage cassette, JOjkt is the recording paper stored in this cassette, 3o4 is the paper feed row 2°107
30t is the registration roller, 3o2 is the first conveying roller 2, 110 is the 12-ten b- with many pores.
j// is the fan, 3/J is the second conveyance roller, J/J is the suspension roller, J/3 is the conveyance belt, 11j is the paper ejection) tray, 311 and 3/7 are the ink tanks・Next K ,
The recording operation in the above mechanism will be explained. The inkjet heads JOJ and 301 are
Incoming signal - select 6 except used 2
Since the two recording mechanisms JOIM and 101B operate in exactly the same way, only the Kisho machine 11110/k will be explained here.

The recording paper 3Qj stored in JO4A (paper cassette) is fed along the guide plate 307 by the rotation of the paper feed roller 106 to the registration roller 301, which has stopped rotating, and forms an appropriate looseness. Next, is the recording paper a registration straw? As the JOI rotates, the conveyance roller 302Ilc of the registration rollers JOI and II/ is sandwiched,
The inkjet heads are transported in the JO2 and 303 directions. At this time, 30 inkjet heads and 30
On the same side as No. 3, a 12-ten 310 having pores and a fan 31/ are arranged. Air is blown in the direction. Therefore, the first transport row 9
The recording paper 3oz+tyyyi/l that passed through 101 is transferred to the second transport row on top of J10. During this transfer process, the image data TDK from the image sensor iH is supplied to the inkjet head 10λ or 101 and recorded by the drive circuit accordingly. After recording, record paper J
When the leading edge of the OJ is transferred to the conveyance roller J/J of s2, the recording paper JOj is delivered to the paper discharge tray 5tHcp by the second conveyance roller II and the conveyance belt J/J.

FIG. 5 (mu) shows the control circuit of the reader y6ioo and the light transmitting unit j00, where t7'/ is the COD ?
In-image sensor, timing control times m//
Driving circuit J //3 Driven by K to generate one time series of image data VDA. //- is a quantization circuit,
Quantize the image data TDA. The quantized image signal is supplied to the transmission control circuit ttS. //4 is a central processing unit that controls the operation of each part of the reader II 100 in accordance with a control program convoluted with a memory/17 K consisting of Zunda access memory, read-only memory, etc. 111 is a port for controlling the reading mechanism;
Flashing signal to lamp 10r, feed rollers 10am and 1
It sends drive signals to the brakes and clutches for rotating or stopping 01, and receives detection signals from document position detection devices 104 and 107tih. //Riha;
It is an input port for the control panel and receives the control signal from the control panel 12/ placed on the cover/20 on the top surface of the reader/DO. Control=N/J/ is the three buttons that select the recording mechanism and recording color.
lkoZa~-IJ/4, recording stand button/J/・
, a cancel button I and an intensity change dial for changing the intensity of the light beam Lt simultaneously irradiated from the light transmitting szoo to the light receiving ill 700. When the Gushini button /J/a is pressed, the transmitted image data VD is supplied to the black inkjet head JO of the first recording mechanism 5ate, and recording by black ink is performed.

Next! ! The relationship between each button, recording mechanism, and recording color is shown below. This is an instruction data boat, which contains various instruction data CD'ik for controlling the recording operation of the recording mechanisms 301A and 30/B: Supplied to transmission control circuit /lj.

/, 27 is a transmission control boat, and a transmission control circuit //j
Sends a transmission control signal to control navel operation.

According to the transmission control signal and the timing signal, the transmission control circuit //j performs the necessary processing on the image data D supplied from the quantization circuit /l or the command data CD supplied from the command data board +//. and its output signal (
Data signal) D8 is supplied to the frequency modulation circuit.

In this embodiment, in order to distinguish between the im-image data VD and the command data CD, as shown in FIG. Add VH or command data header CGV. The data signal D8 to which these headers have been added is supplied to the pulse frequency modulation circuit. This I
The M circuit/J da is controlled by the supplied data signal D8,
The clock signal CKM supplied from the tie-ink control circuit is pulse-frequency modulated.

Modulation circuit/J output FMB is increased for LID drive @II/
The output light V of the light emitting diode 10/, which is supplied to the light emitting diode 10/ and whose output drives the light transmitting unit 5000 light emitting diode rot, is, as mentioned above, a lens! It is focused at 0J to form a light beam Lt, and this beam Lt is supplied to the light receiver @700.

here,! 00 has a plurality of light emitting diodes Sa
t, control console /J/ intensity change dial /2/
The light emitting diode (LI) is selectively driven based on the instruction of 1.
D) A selection circuit, the details of which are shown in Figure 417 (B). - in ! 03 is the decoder! 0# is a relay circuit, and an intensity designation signal of the light beam Lt enters the decoder IOJ from an intensity change dial /co/g. The decoder 101 decodes this incoming signal and creates a relay circuit! Outputs a control signal to 0 reference. relay circuit zoo
(There is a switching means for controlling the on/off state of the i1 light emitting diodes 5et-i to 10/-m. A predetermined number of light emitting diodes are turned on according to the control signal received via the % signal edge 81. Therefore, as described above, Then, the pulse IFM circuit 124c is connected via the LID driving booster fFl.
The modulation signal FM8 supplied from the relay circuit is supplied to the light emitting diodes turned on in the relay circuit, thereby causing a predetermined number of light emitting diodes to emit light. That is, the number of light emitting diodes corresponding to the intensity specified by the dial /J/g are driven to emit light. Therefore 1. A light beam Lt of a predetermined intensity is transmitted to the light receiving unit 7 via the lens 302.
00 will be irradiated.

・Figure 97 shows the recording section 3000 control circuit and the light receiving section 700.
The light beam Lt from the light transmitting section 200 described above is converted into an electric signal, that is, a MELF 1M signal 1MS, by an avalanche photodiode 70/. 70 is this signal FM
This is a preamplifier for amplifying the signal 8, and its output signal is supplied to the narrow band amplifier 3 of the recording section 100 via the aforementioned coaxial cable D00. The output signal of the narrow band amplification fFJ is supplied to the demodulation circuit 3.

The demodulation circuit JJ/ extracts a demodulated clock signal CKD and a demodulated data signal D8 from the supplied signal FM-8.
The demodulated clock signal CKI) is sent to the timing signal generation circuit l.
This circuit JJJ generates a write control clock signal CKW. This signal Off is the recording mechanism S.
It is used as a timing signal for outputting atm or 7o/Be)'It. Demodulated data signal DB is supplied to V real parallel conversion circuit JJJ l'l: This hair change circuit J
23 converts the demodulated data signal D8, which is a serial (time series) pulse signal, into a parallel (parallel) pulse signal P8, and sends this to the image header (2) detection circuit 32, the instruction header CH detection circuit J2j, and The signal is supplied to 32 latch circuits, and the serial pulse signal DB is delayed by a required period of time and supplied to the gate circuit JJ7.

When the image header IIR circuit J Koda detects the image header VB shown in FIG. 4, it outputs the i-image header detection signal VH8,
The gate circuit 327 is supplied to open this goo) J, 27, at which time the O image data VD is directly sent to the KiS machine JO/k or JO/B, or the image data is temporarily stored in the iii image memory JOIN. 'Ik. The instruction header detection circuit J2j is shown in FIG.

When the instruction header CH shown in is detected, an instruction header detection signal CHB is generated. This signal CH8 is sent to the delay circuit 321.
K is supplied to the latch circuit JJ4 with a delay of a predetermined number of bits.
To? Supplied as a test signal. As a result, the latch circuit JJ4 doubles the command data signal CD when parallelization is completed. This command data signal CD is an interrupt tree request,
Start tying.

4 for specifying the recording mechanism 10/m or 10/fJ to be used, the recording color, etc., and the recording mechanism is controlled in accordance with this signal CD. - The image header detection circuit JJ and the instruction header detection circuit J21 also supply a detection signal to the dead time generation circuit xso K via the OR circuit 32f at the time when each header is detected. JJO generates a dead time signal D'l'51 in response to this detection signal. This dead time signal D'l'8 is supplied to each header detection circuit JJ# and 121. This Dead Time No. 411 D'
While l'8 is being supplied, each header detection circuit JJ4C and JJj stops operating. As a result, even if there is a part O in the same bit configuration as the image header (2) or the instruction header CH in the % image data data frame D, this is prevented from being detected as the header VH or CM.

In the image transmission system of the present invention configured as described above, the image information read in the image reading @100 is sent to the light transmitting unit 200.
Light received by the recording unit 200 side as a light beam @ 700
When irradiating the light beam toward K, the intensity of the light beam can be changed by adjusting the intensity change dial placed on the control /J/ of the reading section 100. Therefore, in FIG. 1, reading g to
Light beams L emitted from o-t, too-2 and 100-3 and received by the light receiving unit 700 at different angles
In order to make the intensities of t-/, Lt-J and Lt-j the same level in this light receiving part 700, each reading part too-
It can be adjusted in t-too-i. This makes it possible to reliably transmit the image data read in each reading 5100-/-/DO-3 to the recording unit 300 side. Furthermore, regarding the light receiving unit 700, the communication distance covered by this light receiving unit 100 is expanded, and the light receiving unit 700
service area can be expanded.

Next, %j@(C))X, Lu1l selection circuit 5ooAOa
Here is an example of light emitting diode 10/-/%! 0/
-n O Relay circuit 14100 as switching means
A gate circuit Saj is used instead. In this embodiment, the light emitting diode 1 ode #)/-1~rot-
LID drive amplification 5 IJl-/~ corresponding to each s
/JJ-1 is provided, and the control signal Kl! is supplied from the change switch /J/1 via the decoder jOJ! It's a gate circuit! In σl, the modulation signal 4B supplied to the exposure gate + circuit soz K that closes a predetermined number of gates is supplied to the corresponding LID driving amplifier via the closed gate, and further increases the power of this amplifier.・Supplied to the light emitting diode. When set to 5, a predetermined number of light emitting diodes corresponding to the intensity set with the dial/J/g are driven.
Therefore, the tip of the force is focused by the lens 102K and irradiated as a light beam Lt.

Next, %mj diagram (D3 and (1) are two other examples for changing the tonicity of the light beam Lt.
@Route'Ik is the t shown. In these embodiments, the number of light emitting diodes 10/ is one and the attenuator 5
06) Engineered 'gD drive power supply! The intensity of the light beam Lt is changed by interposing o7 and controlling the light emission intensity of the light emitting diode 10/itself. That is, at the j-th point (D3), the modulation signal FM8 is amplified by the LID drive amplifier lSl 5 and then supplied to the attenuator 104. At the attenuation@#1, the intensity change dial /J/g
JR#i signal rMB supplied according to the control signal from
Powers the light emitting diode zoiKtB at a predetermined level.
As a result, the light emitting diode jlD/ emits light with a predetermined intensity. In addition, gt diagram (sha in the sub, dial lλ/
A control signal from G is supplied to the LID drive power supply 107K, and according to this control signal, the LI
The output to the D drive amplifier 18 is controlled. This results in
Amplifier 12! The way the light is output from the light emitting diode 10/ is controlled.

As explained above, according to the present invention, when the image information read by the image reading section is transmitted as a light beam to both image recording sections, it is possible to improve the wrinkles of the light beam by 5Kt.
, - Regardless of the distance between the image reading section and the SLL recording section, the image recording section can always receive a light beam as image information at an appropriate level, so that the reading section can read it. Reliably transmits image data, etc. to the recording unit,
It can be recorded, memorized, etc.

[Brief explanation of the drawing]

Fig. 1 is a layout diagram showing an example of an image transmission device embodying the present invention, Fig. 1 is a line diagram showing an example of data transmission by spatial optical communication, and Fig. 1 shows an example of the configuration of a reading section. Internal configuration diagram, Figure 1 is an internal configuration diagram showing an example of the configuration of the recording section%
@jFigure (A) is a block WA showing an example of the configuration of the control circuit of the reading unit and the light transmitting unit, dark blue! Figures (ml) and (C)
are block diagrams showing two examples of LID selection circuits, FIG. 5CD
) and (1) are block diagrams showing two examples of the LID light emitting strong fi1 node circuit, the fourth line is a diagram showing an example of the bit and configuration of the data signal, and Figure 7 is the control circuit of the recording section, FIG. 2 is a block diagram illustrating an example of the configuration of the i-tip section. Lt, Lt-/, Lt-J, Lt-J,...Light beam. 1; r -...Reflected light from the original, ! ...Blow direction, ...VD...Quantized image data. CD...Instruction data. D8...Data signal C1i (generic term for image data and command data), FMS...Output of pulse frequency modulation circuit (pulse frequency signal), WCK-...Write control clock, B...Document feeding direction. M...Original reading position, Cff...Write control clock, VB...Image header, cicM...Modulation award signal, CII...Command head, D. CH8...Instruction header detection signal, -0DT&...
... Dead time signal ~ NIF... Negative edge detection pulse. 100, 100-/, 1004.1m0-J・Medium・Reading section 10/... Sheet form Haraaki, 10J, 1
01...Destination -2゜10*-...1 Latin,
toz-...Document feed 9 guide, iot...Light emitting element, -107-...Light receiving element, 101...Bar-shaped light source, 10ri...Folding Z2-/10-...
Imaging lens % I//φ...CCD line image setting control circuit. JJJ-...CCD drive circuit, l/#...quantization circuit. i-i s...transmission control circuit, //4-CPU %
//7-・Memory, JOt...Reading mechanism control board, '), 1" //rije・Console input port, tJU-...Reading unit top cover. lko/'-...Control; Nunru, zzza-@-f
-Book aL Hotan. /J/g...Dial, JJJ...Command data boat/JJJ...Transmission control boat, /J
Thing... 7M circuit. lkot, JJ1-/, /koj-J, ...-, JJ
J-n = LID drive increase ms. 'zoo...recording section, 10/Ni-@/era record structure% 10/B-2nd recording mechanism, 10/M...image memo 1) +, 30 co--inkjet head (black),
30J...Inkjet spatula 1°7 (red),,
, JO4I-recording paper storage cassette. Jo! , . . . recording paper, 106-paper feed roller. 3ρ7-(...To the guide plate JOt-...Regist-〒2, JOt...First transport port, -2, Jlo
-...Platen. JOt...fan, JJJ-...the absolute conveyance port-? . JJJ...Suspension depression-2, 31 da--transport belt. JJJ... Paper output tray% J/base, J/7...
ink tank. xJo - Narrowband amplifier, JJ/- Rear leg circuit. JJJ..., tying signal generation times S, -J
J3...Serial-parallel conversion circuit. JJ-...-billion header detection circuit, JJj...commant header detection circuit, -JJ
4-...Latch circuit, JJ7-...Gate circuit,
JJj...Delay circuit, jJri...OR circuit. 110...internal clock starting circuit, 100, ! 00-/, 100-2.100-J'
...Light transmitting section, 10/, 10/-/, ! 0 coco,
...-, JOt-ring... light emitting element. 102.-Lens, 101.-Decoder. jeda...relay circuit, j7j...gate circuit% -104...attenuation l! , je7
・-Riku DI [Dynamic power supply. 700... Light receiving section, 70/... Light receiving element, 702... Preposition amplifier'
Width board. yao...Coaxial cable〇Figure 5 (C) (0) (E) +z4

Claims (1)

[Scope of Claims] At least /II individual reading sections arranged in a dispersed manner, and a light transmitting section connected to the individual reading sections and outputting the read information read by the individual reading sections as an optical signal via a light emitting element. and a light receiving section of at least %/II that receives the optical signal from the light transmitting section. An image transmission system comprising: a central recording section to which the light receiving section is coupled with SK, and the strongest optical signal R' outputted from the light transmitting section to the light receiving section can be changed. 2. In the image transmission system according to claim 1, the light transmitting unit includes a plurality of light emitting elements, a selection means for selectively driving the plurality of light emitting elements, and an intensity for indicating the intensity of the optical signal. an instruction means, and the selection means selectively drives a predetermined number of the light emitting elements based on an instruction from the intensity instruction means. 3) In the image transmission system according to claim #I1, adjusting means for adjusting the drive output of the light emitting element;
An image transmission system comprising: an intensity indicating means for indicating the intensity of the optical signal described in IIf, and the light emitting element is driven by the adjusting means with a predetermined output based on the intensity indicating means.