JPH02196665A - Color ink recorder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color ink recording device, and more particularly, to color ink recording using a charging method in which different color inks are formed into charged particles and are ejected from an ink jet head.

[Conventional technology]

In a typical ink recording device of this type, a charging electrode is disposed between an ink jet nozzle and a deflection electrode, and a charging voltage is applied to the charging electrode at the timing when ink is turned into particles from the ink jet nozzle.

Due to the electric field between the charged electrode and the ink in the head, charges of opposite polarity to the charged electrode are concentrated at the leading edge of the ink protruding from the ink ejection nozzle, and when the protruding ink separates into particles, the ink particles Carrying only charges of opposite polarity (charge). The charged ink particles are deflected by a deflection electric field while passing between the deflection electrodes. For example, uncharged or low-level charged ink particles collide with a gutter and are collected in an ink tank, and ink particles charged to a predetermined level or higher pass outside the gutter and collide with recording paper (recording). Such an ink recording assembly is used, for example, for cyan inter recording,
We have three sets for magenta recording and yellow recording,
Each color is recorded in each recording assembly.

On the other hand, there are also ink recording devices that use light irradiation to separate ink particles from the head using light irradiation.

In this case, for example, ink in the recording head is irradiated with a laser beam through a glass plate, and bubbles are generated in the portion of the recording head that is irradiated with the laser beam. Since the ink is pressurized in the area where the bubble occurs, the ink protrudes from the head and advances to the recording paper.

[Problem to be solved by the invention]

In the charge deflection type ink recording apparatus described above, the charge electrode is located in the space between the ink ejection nozzle and the deflection electrode, so when ink ejection starts or ends.

The ink jetting speed is low so that the ink collides with the charging electrode and stains the charging electrode, and the ink droplet generated by the ink jetting also stains the charging electrode. If the charged electrode is covered with ink,
If the charging characteristics of the charging electrodes fluctuate and the amount of charge on the ink particles becomes unstable, or in the case of multi-nozzle recording where multiple dots lined up side by side are recorded virtually simultaneously, adjacent charging electrodes may be short-circuited by the ink. The desired charge will no longer be achieved.

In addition, in multi-nozzle recording, a charged electrode is placed in the space between the ink ejecting nozzle and the deflection electrode independently of the ink ejecting nozzle, and ink particles ejected from one ink ejecting nozzle are transferred to one charged electrode (cylindrical). Inkjet nozzles must be passed through the inner space of the inkjet ink (or inverted U-shape), and adjacent charging electrodes must be insulated, so it is difficult to shorten the arrangement pitch of the charging electrodes, and it is not possible to arrange the ink jet nozzles at a high density. .

Recording/non-recording of ink particles is determined by whether or not a charging voltage is applied to the charging electrode when the ink particles are ejected from the ink jet nozzle, so the original image must be converted into a video signal once, so-called Image recording cannot be performed by direct projection of the original image by a mechanical optical system.

In the above-mentioned light irradiation type ink recording apparatus, the laser power is used to heat the ink in the portion of the recording head that is irradiated with the light beam to generate bubbles.

A high output laser (N2 laser) is required. This output is about 2000 times the exposure power of a semiconductor laser used for exposing a photoreceptor in electrophotographic processing, for example, and -
There is no prospect of widespread use.

Furthermore, since high exposure power is required, the original image must be converted into a video signal once, and image recording cannot be performed by directly projecting the original image using a so-called mechanical optical system.

SUMMARY OF THE INVENTION An object of the present invention is to provide a color ink recording device that can perform high-resolution and high-speed recording with low-power light irradiation.

[Means to solve the problem]

The color ink recording device of the present invention each has a surface (
2) is an electrically conductive transparent substrate (1), a photoconductor (3, 4) bonded to the surface (2), and an ink jet j! along the surface of the photoconductor (3, 4). 8 (8bi) formed member (
8).

An ink charging ffi that cooperates with the base (1) to form an electric field in the ink ejection path (8bi). ! (7), and
A plurality of ink recording means (IOC) including an ink flow path (54) for supplying ink to an ink jet path (8bi).
, IOM, l0Y); these ink recording means (IOC
, IOM, 10Y), a plurality of ink supply means (50C, 50
M, 50Y) ; and ink recording means (IOC, 1
A light irradiation means (30) is provided for irradiating light corresponding to an image onto each photoconductor (3, 4) through each light-transmitting substrate (1) of 0M, 10V).

[Effect]

According to this, the light irradiation means (30) is connected to the photoconductor (3, 4).
), the photoconductor generates carriers (electrons and holes) in response to the light, and among these carriers, the potential polarity (positive) of the substrate (1) surface (2) is opposite to that of the substrate (1) and the surface (2). (minus) carriers (electrons) are transferred to the surface of the substrate (1) (
2), carriers (holes) having the same potential polarity as the potential polarity of the substrate (1) and surface (2) are drawn to the ink ejection path (8bi).
The ink in the ink ejection path is charged. When there is no light irradiation, this charge does not substantially occur, so the light irradiation means (30) emits light corresponding to one image onto the photoconductor (
3, 4), a charge corresponding to the image is formed in the ink in the ink jetting path (8bi).

If image-specific charging is performed in this way, each ink recording means can be charged using a conventionally known electric field attraction method, charge deflection method, or ejection/non-ejection control using a control voltage as described in the embodiment described later.

Each color ink can be recorded.

For example, by using a laser exposure scanning device as the light irradiation means (30) and forming an ink ejection path along the scanning direction, ink corresponding to one scanning line is ejected in one ejection, and one line recording is performed. It is possible to do so.

Therefore, according to the ink recording apparatus and recording method of the present invention, the charging electrode in front of the ink recording head is omitted, and
Furthermore, ink recording is possible with low-power light irradiation similar to electrophotographic laser exposure scanning, and high-resolution and high-speed recording can be achieved with low-power light irradiation. Copy recording in which the original image light is directly projected onto the ink recording means is also possible.

Other objects and features of the invention will become apparent from the following description of embodiments with reference to the drawings.

〔Example〕

FIG. 1 shows an outline of the configuration of an embodiment of the present invention.

Ink in an ink tank 40 containing cyan ink is sucked by a pump 42, pressurized, and supplied to an accumulator 43. In the accumulator 43, the pump 42
Pressure fluctuations due to suction and discharge are absorbed. Ink at a constant pressure is supplied to the cyan ink recording head IOC through the electromagnetic switching valve 44. In the head IOC, a laser scanning device 30 emits light. Laser beam assigned to cyan color recording (light emitted when cyan color recording image signal is not recorded,
During recording, the ink is charged to a positive potential (no light is emitted), and when there is no light irradiation (recording), it is substantially uncharged. Further, constant frequency pressure vibration is applied to the ink by constant frequency excitation of the vibrator 35, and ejection control electrodes (55a, 55
b, 56a, 56b) are applied with a potential to restrict the ejection of the charged ink, thereby restricting the ejection of the charged ink. As a result, ink particles corresponding to pixels to be recorded in one main scanning line are simultaneously ejected from the ink ejection ports of the ink ejection head 10C. The ejected ink particles collide with the recording paper 11 (recording).

When ink ejection is stopped, first the pump 42 is deenergized,
Then, the solenoid of the electromagnetic switching valve 8 is deenergized. The electromagnetic switching valve 44 switches the accumulator 4 by deenergizing the solenoid.
3-head IOC, and accumulator 43
- The ink tanks 40 are communicated with each other.

On the upper surface of the upper half 9 of the cyan ink recording head IOC,
A light receiving slit 9a is opened to receive the laser beam,
Here, the laser exposure scanning device 30 irradiates laser light assigned to cyan recording.

An ejection port for ejecting ink is opened on the front surface of the ink recording head IOC along the longitudinal axis of the head IOC.

The ink recording head IOM for magenta color recording and the ink recording head IOY for yellow color recording have the same structure as the ink recording head IOC for cyan color recording. 50M
And magenta ink and yellow ink are supplied from the yellow ink supply device E50Y. Magenta ink supply bag! 150M and the yellow ink supply device 50Y have the same structure as the cyan ink supply device 50G.

The laser exposure scanning device 30 is a known device used in so-called laser printers, and has an oscillation wavelength of 780±1.
The light (three rays) emitted by the light source 15 which includes three sets of laser diodes (for cyan recording, magenta recording, and yellow recording) of 0n■ is transmitted to the first cylindrical lens 16.
The light is then reflected by the first mirror 17, then passes through the spherical lens 18, and is irradiated onto the rotating polygon mirror 19.

The rotating polygon mirror 19 is driven to rotate at a constant speed by a motor 20.
Reflects the irradiated light. As the polygon mirror 19 rotates, the angle of the mirror surface that reflects the irradiation light with respect to the irradiation light gradually increases.9 In the illustrated example, the mirror surface with respect to the irradiation light is updated every rotation of 360 degrees/6, and the polygon mirror 19 The reflected light is swung repeatedly (line scanning: main scanning) once in a multi-faceted file.
The light reflected by is reflected by the first mirror 17, passes through the second cylindrical lenses 21G, 21M, and 21Y,
A recording control device (not shown), which advances into the light receiving slits 9a of the recording heads IOC, IOM, and IOY, respectively, activates three sets of laser diodes of the light source 15 during line scanning.
It is turned on/off in response to each color image signal (signal indicating recording/non-recording of line content dots) to irradiate or non-irradiate laser light for each color. In order to obtain an optical scanning line synchronization signal that indicates the division of one line scanning (switching of the reflective surface and switching of the second line), a mirror 2 is installed outside the line scanning section.
2, the light reflected by this mirror 22 is detected by a photosensor 23, and this detection signal (exposure scan synchronization signal) is given to the recording control device. The recording apparatus drives and energizes the platen 39 to feed the paper (IIJ scan) at a constant speed. By the above-described main scanning (line scanning) and sub-scanning (paper feeding), the entire surface of the paper is scanned for recording.

FIG. 2 shows the ink recording head IOC and IOM.

Figure 3a shows an enlarged cross-section of the ink ejecting section of 10Y, and Figures 2 and 3 show enlarged views of the tip of the head IOC.
The structure of the ink recording head loC will be described with reference to FIG. Does Nesa Glass 1 have translucent light on its surface? It has lJ2.

Guidance! A charge generation layer (CGL) 3 and a charge transfer layer (CTL) 4, both of which are organic photoconductors, are bonded onto the WJ2, and the surface of the charge transfer layer 4 is covered with a protective layer (r'L).
5. The conductive layer 2 of the Nesa glass 1 is connected to the positive output terminal of the power supply circuit 51.

The charge generation layer (CG) of the lower half 6 of the ink recording head IO
A charging electrode (conductive layer) 7 is bonded to the portion facing L) 3 and the charge transfer layer (CTL) 4, and injection control electrodes 55a and 56a are bonded to the injection end side. On these electrodes 7.degree. 55a, 56a, a large number of comb-like nozzle partition walls 8ai made of synthetic resin are formed at a pitch of 100 microns along the laser scanning direction.

FIG. 3b shows an enlarged appearance of the ink ejection partition wall 8ai. This nozzle interval 18ai includes the lower half body 6 and the electrode 7,
An insulating anti-etching coating (
Then, a synthetic resin sheet (8) is bonded to the surfaces of the electrodes 7, 55a, and 56a, and the sheet (8) is etched to form electrodes 7.55 with a pitch of 100 μm.
a.

It is formed by etching until the portion 56a is exposed. Nozzle partition walls 8ai face the photoconductors (3, 4), and together with the photoconductors, define ink ejection paths 8bi between adjacent nozzle partition walls (8ai). The upper half 9 also has an injection control electrode 55b facing the injection control electrode 55a, and
An electrode 56b is joined to face the injection control electrode 56a.

A power supply circuit 51 applies a predetermined voltage between the conductive layer 2 of the Nesa glass 1 and the charging electrode 7. Injection control electrode 55a
and 55b are commonly connected, and a negative voltage and an alternating current voltage are applied from the power supply circuit 51 at a predetermined timing.

The injection control electrodes 56a and 56b are also commonly connected, and a negative voltage, a positive voltage, and an alternating current voltage are applied from the power supply circuit 5I at predetermined timing.

The pressurized ink supplied to the ink flow path 54 of the ink recording head IOC reaches this ink ejection path 8bi and is ejected from there.

Pass the Nesa glass l through the upper half 9 of the head IOC,
A light receiving slit F for irradiating the cyan recording laser onto the organic photoconductor (3, 4) directly above the ink jetting path 8bi.
-, 9a is opened. The diameter of the ink jetting path 8bi is 100 μm, and the array length (length in the main scanning direction) of the ink jetting path 8bi is 210 m+*.

The cyan recording laser beam projected by the multifaceted file is irradiated onto the Nesa glass 1, passes through it, and reaches the charge generation layer (CGL) 3. Due to this irradiation, photocarriers (holes and holes) are generated in the charge generation layer 3. electron) is generated. conductive layer 2
Since is at a positive potential, the electrons generated in the charge generation layer 3 are neutralized with the holes in the conductive layer 2 and disappear. On the other hand, holes generated in the charge generation layer 3 move in the charge transfer layer (CTL) 4, pass through the protective film (PL) 5, and pass through the ink ejection path 8.
Injected into bi ink.

At this time, the CGM in the charge generation layer 3, the donor I in the charge transfer layer 4, the donor I1 in the ink, so that the holes generated in the charge generation layer 3 move at high speed to the cyan ink in the ink ejection path 8bt. ．． The respective ionization potential energies of -(IP), CGM -IP, donor (I) IP, donor (II) Ip, CGM
Each material is selected so that IP>Donor (I) IP>Donor (II) IP.

4a, 4b and 4CWi, CGM, donor (■), and donor (II) selected as described above.
The molecular structural formula and the value of ionization potential energy IP are shown.

The charge generation layer 3 is made by dispersing CGM and a binder resin, and the charge transfer layer 4 is made by dispersing a donor (I) and a binder resin in a suitable solvent, and the dry film thickness is made to be <0.3μ.
The charge transfer layer 4 is formed by spray coating to a thickness of 1 μm.

The charge transfer layer 4 requires a protective layer because CGM is soluble in the ink solvent, and a thin (0.3μ) protective film (PL
) 5 is necessary as an undercoat layer for uniform coating.

The material of the protective layer 5 is polyamide resin so as not to block or trap holes.

The solvent for the inks (cyan, magenta, and yellow) must have high resistance to prevent the lateral spread of holes, and petroleum-based solvents are commonly used as wet developers in electrophotography. It is. Isovar G, H, and L were used. In addition to the coloring material, the ink contains donor (II) at 10% (
nt%] dispersed.

The potential of the conductive layer 2 of the Nesa glass 1 is +1.0 kv, and the potential of the electrode 7 is 0.0 kv. Okv (i.e. grounding), the distance between 2-7 is 0.1 mm, so
Due to this potential difference, 1.0/107 (V/m) between the two poles
electric field is applied. The number of genuine bills generated by light irradiation is
approximately 1/10' C coulomb/cm2).

100μ x 100μ (equivalent to the area of 1 pixel) is 1/1
0'' [coulombs], which is the total charge amount of an ink droplet with a radius of 62μ (100μcubes=4/3πr! Therefore, r=62μ) formed from 100μcubes (the amount of ink for one pixel).

The hole mobility μ in an oil-based ink containing 10 [nt, %] of donors is l/10" (am2/VS).

The velocity V of holes in the ink is ■ = μE = 1/10" x 10' = 1/10
' (am/s). The time it takes for one line to be scanned by the laser exposure scanning device 30 is 1 (+s 5mm
The distance X that this hole moves in 1 hour is.

x = v t = 1/10' XI/10 = 1/
to' (c+sl = 1/10' (am), that is, from the charge transfer layer 4 to the ink ejection path 8
The holes injected into the ink of ai are connected to the lower electrode 7.
■ Finish scanning the line before reaching .

When one line of scanning is finished, and before the next scan begins, an excitation voltage is applied to the vibrator 35, which is a bimorph piezo element, of the recording head 10. When the pulse voltage is applied, the vibrator 35 changes the ink flow path. The cyan ink in the ink flow path 54 is swollen (curved) toward the 54 side and pressurized.

This pressure propagates to the ink in the ink ejection path 8al, and the ink attempts to be ejected. In other words, ink corresponding to l main scanning lines attempts to be ejected from each ink ejection path (8ai) at the same time. The ink you are trying to spray at this time (
- lines, 21010.1 = 2100 pieces) includes both positively charged ink in the laser irradiated area and non-charged ink in the laser non-irradiated area.

The voltage applied to the vibrator 35 is a constant-period pulse that turns on and off every time one main scanning line finishes scanning.
When a voltage of a certain polarity is applied, the vibrator 35 bends back to bulge toward the ink flow path 54 and pressurizes the ink.
When the voltage disappears or a voltage of the opposite polarity is applied, the ink flow path 54 is bent outward (reversely warped) and the ink pressure in the ink flow path 54 is lowered. FIG. 5 shows the relationship between the repetition of laser exposure scanning and the ink pressure in the ink jetting path 8ai due to the excitation of the vibrator 35.

Referring to FIG. 5, during the l-line scanning of the photoconductive layers (3, 4), the aforementioned voltage (
The conductive layer is applied with a positive voltage and the electrode 7 is applied with a negative voltage, and the ejection control electrode 55a is used to promote ink charging corresponding to laser irradiation.

Although a negative potential is applied to 55 b, 56 a, and 56 b, one line of laser irradiation is completed and the vibrator 35 is excited and energized, and the vibrator 35 pressurizes the ink in the ink flow path 54. The injection control electrode 56a is aligned with the timing at which the pressure propagates to the injection end.

A positive potential is applied to 56b, and this positive potential repels the positively charged ink and restricts its ejection. Therefore, charged (plus) ink is not ejected, but uncharged ink is ejected. When the pressure of the ink in the ink flow path 54 is reduced by ending the energization of the vibrator 35 and returning the vibrator to its original shape, the electrodes 55a, 55b-56a, 56
An AC voltage for static elimination is applied between b.

The uncharged cyan ink ejected from the ink ejection path 8ai collides with the recording paper 11.

That is, the outlet portion (electrode 5
6a, 56b), the charged ink is restrained from moving, the uncharged ink passes freely, and only the uncharged ink is ejected and collides with the recording paper 11.

By the same operation as described above, the head IOM is scanned by a laser beam for magenta recording and ejects uncharged magenta ink at a position where the laser beam is not irradiated. head IO
Y is scanned by a laser beam for yellow recording and uncharged yellow ink is ejected at a position not irradiated with the laser beam.6 According to the embodiment described above, each ink is ejected at the tip of the head by a semiconductor laser beam. In order to control the injection of charge into the ink in the path, charge/uncharge the ink, and eject only uncharged ink (ink allocated for recording), an ink charging electrode is installed at each nozzle individually in front of the head. There is no need to install a deflection electrode or a gutter, and the number of nozzles in the head can be increased to about 2000 for recording. Even when using a laser exposure scanning device as described above, its optical power is

! The semiconductor laser output of a photo-type laser printer is sufficient. As the light irradiation means, for example, a slit exposure optical system that simultaneously projects one line of the original image can be used in addition to such a laser exposure scanning device.

In addition, in the above embodiment, the charging electrode 7 is omitted,
The electrode 55a may also be used as a charging electrode, and when the charging electrode 7 is provided, the electrodes 55a and 55b may be omitted.

Next, other embodiments and modifications of the present invention will be described. In another embodiment of the present invention, as shown in FIG.
Another set of electrodes 57a.

57b, the ink heading toward the ink jetting path 8bi is negatively charged with these electrodes 57a and 57b, and laser irradiation is performed in the same manner as in the previous embodiment (FIG. 6b). At the timing when the ink propagates to the ejection end, a negative voltage is applied to the electrodes 56a and 56b to accelerate and eject ink positively charged by laser irradiation. To further accelerate this acceleration, a positive voltage is applied to the electrodes 55a, 55b (Figure 6C) until the vibrator 35 is no longer energized and it applies a negative pressure to the ink (Figure 6D). After waiting, a positive voltage is applied to the conductive layer 2 of the Nesa glass 1 and the electrode 7, and the electrode 57a is removed.

Nesa glass 1 ink that is negatively charged with 57b
Zero or more suction directly below is the process of one line ink jetting. In this embodiment, positively charged ink is ejected by laser irradiation, and the (negatively charged) ink at the non-laser irradiated area is at the electrode 56a.

It is repelled by the negative potential of 56b, and a restraining force acts, so that it does not eject.

This embodiment also provides the same effects as those of the previous embodiment. In this embodiment, the ink is negatively charged (reverse polarity) in advance, but the electrodes 57a and 57b
This negative charge may be omitted by omitting . In this case, ink is supplied to the ink recording head 10 at a relatively low pressure such that uncharged (non-accelerated) ink is not ejected.

As mentioned above, since the ink is charged/uncharged by light irradiation, the present invention uses a deflection electrode and a gutter (3
A pair of heads 10C, IOM, IOY and the recording paper 11 are arranged between the heads 10C, IOM, IOY and the recording paper 11, and the heads eject charged and uncharged ink particles, and the charged ink particles are ejected onto the recording paper 11 by a deflection electric field. In this embodiment, the electrodes 55a, 55b, 56a and 56b are omitted, in which case uncharged ink particles may be captured in the gutter by collision. Further, it can also be implemented in an electric field attraction mode. In this case, a charged ink particle attraction voltage is applied to the platen 39, and the vibrator 35 is omitted.

〔Effect of the invention〕

In any case, according to the present invention, a charged electrode outside the head can be omitted, high-density color tod recording can be performed in the recording line direction, and even when a laser exposure scanning device is used, its optical power can be reduced. There is no need to make it particularly high, and high-resolution and high-speed recording can be achieved with low-power light irradiation.

therefore.

Copy-type color ink recording in which original pixels are projected directly onto the photoconductive layer may also be performed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a schematic configuration of an embodiment of the present invention. FIG. 2 shows the ink recording head 110C210 of FIG.
FIG. 2 is an enlarged cross-sectional view of IOY taken along line II-II. FIG. 3a is an enlarged sectional view of the tip of the ink recording head 10G shown in FIG. 2. FIG. FIG. 3b is an enlarged perspective view of the ink ejection path 8ai at the tip of the lower half 6 of the ink recording head IOC. FIG. 4a is a plan view showing the molecular structure of the components of the charge generation layer 3 shown in FIG. 3. FIG. FIG. 4b is a plan view showing the molecular structure of the components of the charge transfer layer 4 shown in FIG. 3. FIG. FIG. 4c is a plan view showing the molecular structure of components contained in the ink. FIG. 5 is a time chart showing the relationship between laser exposure scanning and ink pressure vibration applied by the vibrator 35 in the ink recording apparatus shown in FIG. Figures 6a, 6b, 6c, 6d and 6e
The figure is a schematic cross-sectional view showing the charging mode of ink in another embodiment of the present invention. 1: Nesa glass (transparent substrate) 2: Conductive layer (surface) 3
:l! Charge generation layer 4; charge transfer layer (3, 4
: Photoconductor) 5: Protective layer 6: Lower half 7: @ pole (charging electrode) 8; Sheet 8a
i: Nozzle partition wall 8bi: Ink ejection path (
Ink ejection path) 9: Upper body 9a: Light receiving slit LOC, IOM, IOY: Ink recording head 11; Recording paper 15: Light source 16: First cylindrical lens 17; First mirror 18 Varnish spherical lens 19: Polygon mirror 20 :motor
SM=Second mirror 2IC, 21M, 21Y
:Second cylindrical lens 22: Mirror
23: Photo sensor 30: Laser exposure scanning device i
! (Light irradiation means) 32: Vibration plate 33
, 34: Bimorph piezo element 35: Vibrator
39 Nibraten 40: Ink tank
41: Ink cartridge 42: Pump
43: Accumulator 44: ft magnetic switching valve 0C, 50M, 50Y: Ink supply bag W1 (ink supply means) 51: 'rig circuit (charging voltage power supply circuit) 52: Excitation circuit 54: Ink flow path (
Ink flow, M) 55a, 55b, 56a, 56b: Ejection control electrodes 57a, 57b: N for reverse charging, pole door 3b ward voice 48 figure east 4b figure procedure amendment (method)

Claims (1)

[Scope of Claims] Each of them includes a light-transmitting substrate with an electrically conductive surface, a photoconductor bonded to the surface, a member forming an ink ejection path along the surface of the photoconductor, and a member having an ink ejection path formed in the ink ejection path. a plurality of ink recording means including an ink charging electrode that cooperates with the substrate to form an electric field, and an ink flow path for supplying ink to the ink ejection path; each ink flow path of the ink recording means; a plurality of ink supply means for supplying ink of different colors to each other; and a light irradiation means for irradiating light corresponding to an image onto each photoconductor through each light-transmitting substrate of the ink recording means; A color ink recording device comprising: