JP2000280480A - Electrostatic ink jet head, electrostatic ink jet drive method, and electrostatic ink jet recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrostatic ink jet head in a simple structure. SOLUTION: A discharge electrode-supporting member 2 is set to a middle part in an opening part 1a of a head casing 1 formed nearly in a rectangle, where a plurality of projecting discharge points (e) (e1-e6) are arranged nearly straight (linearly). Moreover, discharge electrodes 3.1-3.6 corresponding to the discharge points e1-e6, deflecting electrodes 4.1.1-4.1.6 and deflecting electrodes 4.2.1-4.2.6 to the left and right of the discharge electrodes 3.1-3.6 are formed as films on the discharge electrode-supporting member 2, and common auxiliary electrodes 5.1 and 5.2 are formed as a film above and below the opening part of the head casing 1 with sandwiching the discharge electrode-supporting member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic ink jet head and an electrostatic ink jet head which perform recording by discharging charged colored particles onto recording paper by electrostatic force using a toner liquid in which charged colored particles are dispersed. The present invention relates to a method for driving an ink jet head and an electrostatic ink jet recording apparatus.

[0002]

2. Description of the Related Art In recent years, as an output device of a personal computer, an ink jet recording system for forming characters and images on a recording medium (recording paper) by discharging ink particles toward a recording medium facing an electrostatic ink jet head. Printers are widely used. Among them, using a toner liquid in which charged colored particles are dispersed,
2. Description of the Related Art An electrostatic ink jet recording apparatus that performs recording by discharging colored particles onto recording paper by electrostatic force has attracted attention.

In the above-mentioned electrostatic ink jet recording apparatus,
A liquid toner, in which charged colored particles are dispersed in an insulating liquid, is supplied to a discharge point having a sharp tip formed in an electrostatic inkjet head, and the charged colored particles are supplied to a recording electrode provided near the discharge point. A voltage having the same polarity as that described above is applied, and liquid toner is ejected and recorded by Coulomb force.

In order to form an image, a bias voltage is applied to the recording electrode in order to cause the charged colored particles to aggregate at the ejection point, and the ejection voltage is applied to the recording electrode in accordance with an image input signal. Make a record. At this time, if the voltage application time is controlled for each recording electrode, gradation recording according to an image input signal can be performed. This electrostatic ink jet recording method enables high-density printing by aggregating and discharging charged colored particles, and the electrostatic ink jet head has a simple structure. It has the feature that high-speed printing can be easily performed.

In order to stabilize the printing quality and increase the printing speed of such an electrostatic ink jet recording,
For example, as described in JP-A-8-258270, printing is performed by applying a bias voltage lower than that of an adjacent recording electrode for a short time to a recording electrode of a selected ejection port to be printed. After the charged colored particles are aggregated in the vicinity of the recording electrode where recording is to be performed, a method of performing recording by applying an ejection voltage, or, as described in JP-A-9-85954, A migration electrode electrically insulated from the ink is provided, and a high voltage having the same polarity as the charged coloring particles is applied to the migration electrode, and the charged coloring particles are aggregated at the discharge point of the discharge port by electrophoresis. Something that has been facilitated has been proposed.

Further, in an electrostatic ink jet head having a plurality of ejection openings in a line, a proposal has been made to stabilize the flight direction of ink flying from ejection openings located at the ends by using dummy electrodes. It is described in JP-A-2-67143.

[0007]

As described in Japanese Patent Application Laid-Open No. 8-258270, a conventional electrostatic ink-jet head has a structure in which a recording electrode to be used for recording from now on is smaller than a recording electrode adjacent to the recording electrode itself. When a method of agglomerating charged colored particles by applying a low bias voltage is used, adjacent electrodes cannot be driven (discharged) at the same time, and recording can be performed at the same time even when n recording electrodes are arranged. Is n
/ 2, making high-speed recording impossible. Further, the electrodes located at both ends have only one recording electrode adjacent to the electrodes (one electrode). Therefore, the condition for aggregating the charged colored particles is different from that of the electrode located at the center, and it is necessary to correct this.

In general, since the discharge point is formed on the wall surface of the head opening (the end of the meniscus formed by the toner liquid), the toner liquid itself hardly flows near the discharge point, and the charged colored particles do not flow. Are aggregated at the discharge point only by the Coulomb force. Therefore, JP-A-8-
As described in Japanese Patent No. 258270, in order to increase the aggregation speed, a high voltage must be applied to a migration electrode provided behind a recording electrode, and as a result, spontaneous ejection from the migration electrode occurs. In order not to cause spontaneous ejection, the swimming electrode must be insulated, which increases the manufacturing cost of the electrostatic ink jet head.

As described in Japanese Patent Application Laid-Open No. 2-67143, in an electrostatic ink jet head in which a plurality of recording electrodes are arranged, the ink flying from the recording electrodes at both ends is bent in a flying direction. Therefore, it cannot be used as it is as a recording electrode, and to obtain n recording points, n + 2 recording electrodes are required, which increases the size of the electrostatic ink jet head and the manufacturing cost. Had become.

Further, in the prior art, in order to increase the resolution by a factor of m, the number of recording electrodes arranged in a line is multiplied by a factor of m and the arrangement interval is narrowed (1 / m), or
Printing was performed m times while moving the relative position of the recording paper and the electrostatic inkjet head by 1 / m of the arrangement interval without changing the arrangement interval of the ejection ports. However, in the former method, an m-fold drive circuit is required in terms of hardware, and m-times data processing must be performed simultaneously in terms of software, which has been a major cost increase factor.
In the latter method, it is necessary to control the relative position between the recording paper and the electrostatic ink jet head with high accuracy.
This also caused a large cost increase.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a plurality of ejection points protruding from an intermediate portion in an opening of a head housing formed in a substantially rectangular shape so as to be substantially straight. A discharge electrode support member arranged in a line (line shape) is provided, and each discharge electrode is formed on the discharge electrode support member in correspondence with each discharge point, and deflection electrodes are formed on the left and right of each discharge electrode. And, common auxiliary electrodes are formed on the upper and lower sides of the opening of the head housing with the discharge electrode support member interposed therebetween,
The toner liquid in which the charged colored particles are dispersed is supplied to the opening of the head housing, and a bias voltage is applied to each of the discharged electrodes. Together with high speed and high density
Ejection voltage can be selectively applied to each ejection point to selectively fly charged colored particles from each ejection point, or simultaneous recording can be performed at all ejection points. Also, the flying direction of the charged colored particles flying from the discharge electrode (recording electrode) located at the end is stabilized (straight).
Let it. Further, it is possible to perform recording with higher resolution than the arrangement interval of the ejection electrodes (recording electrodes). An object of the present invention is to provide an electrostatic ink jet head that enables these, a drive recording method of the electrostatic ink jet head, and an electrostatic ink jet recording apparatus.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electrostatic ink jet head, a method of driving an electrostatic ink jet, and an electrostatic ink jet recording apparatus according to the present invention will be described below with reference to FIGS. Embodiments> to <Sixth Embodiment> will be described in detail in this order.

<First Embodiment> FIGS. 1A and 1B are views for explaining an electrostatic ink jet head according to a first embodiment of the present invention. FIG. 1A shows the static ink jet head of the first embodiment shown in FIG. It is a horizontal sectional view which cut | disconnected the electric type inkjet head in AA, (b) is a vertical sectional view which cut | disconnected (c) in BB,
FIG. 2C is a front view seen from the ejection port side, FIG. 2 is a diagram for explaining the operation near the ejection point of the electrostatic ink jet head of the first embodiment according to the present invention, and FIG. (B) is a vertical cross-sectional view showing a state in which a voltage is not applied to the common auxiliary electrode, and (b) is a vertical cross-sectional view showing a state in which a voltage is applied to the discharge electrode and the common auxiliary electrode;
FIG. 3C is a horizontal sectional view showing a state in which a voltage is applied to the left and right deflection electrodes of the discharge electrode. FIG. 3 is a view showing the electrostatic ink jet head according to the first embodiment of the present invention. FIG. 4 is a circuit diagram showing a circuit for applying an ejection voltage, and FIG. 4 is a partial modification of the electrostatic inkjet head of the first embodiment according to the present invention, in which adjacent deflection electrodes between each ejection electrode are short-circuited. It is the top view which showed the state.

As shown in FIGS. 1A to 1C, in the electrostatic ink jet head according to the first embodiment of the present invention,
A head housing 1 serving as a base is formed in a substantially rectangular shape using an insulator such as alumina. The head housing 1 surrounds the upper, lower, left, and right sides and has an opening 1a having a constant width formed therein. In addition, an ejection electrode support member 2 formed of the same insulator is provided in the middle of the opening 1a in parallel with the upper and lower surfaces of the head housing 1. On the front side of the discharge electrode support member 2 provided in the opening 1a of the head housing 1, a plurality of discharge points e (e1 to e6) are sharply pointed and substantially straight at an equal pitch p. The ejection points e1 to e6 are formed such that the tips protrude from the end surface of the head housing 1 forming the opening 1a. In this first embodiment, the tip of the ejection electrode supporting member 2 made of alumina is sharpened by polishing, and six ejection points e1 to e6 are set as a plurality of ejection points e.
Is formed, but the number of ejection points e may be at least one or more.

Further, on the upper surface of the discharge electrode support member 2, each of the discharge electrodes 3.1 to 3.1 corresponding to each of the discharge points e1 to e6.
3.6 is slightly receded from each of the discharge points e1 to e6, is insulated and separated from each other, and is provided on the rear end side (the opposite side of the discharge point e) of each of the discharge points e1 to e6. The ejection electrode terminals f1 to f6 for extraction are bonded. Each of the above-mentioned ejection electrodes 3.1 to 3.1
3.6 has a function of causing the charged colored particles 6 in the toner liquid to fly on the recording paper 8 (FIG. 8).

On the upper surface of the discharge electrode support member 2, right and left sides of each of the discharge electrodes 3.1 to 3.6, deflection electrodes 4.1.
1-4.1.6 and deflection electrodes 4.2.1-4.2.6.
However, the deflection electrode terminals g1.1 to g1.6 and the deflection electrode for drawing out to the rear end side of each deflection electrode are insulated and separated from each of the ejection electrodes 3.1 to 3.6. Terminal g
2.1 to g2.6 are bonded. The above-mentioned deflection electrodes 4.1.1 to 4.1.6 and the deflection electrodes 4.2.
Nos. 1 to 4.2.6 have a function of controlling the flying direction of the charged colored particles 6 in the toner liquid.

The head housing 1 has a structure in which the opening 1a is divided into upper and lower parts by the discharge electrode support member 2, and each of the discharge electrodes 3. On the side of 1 to 3.6 is a supply path h for supplying a toner liquid in which the colored particles 6 charged to the positive polarity are dispersed, and a toner liquid supply tank 10 shown in FIG. Is provided with a supply port H for connection to the.

Further, each of the discharge electrodes 3.1 to 3.1 in the supply path h.
On the back surface of the top plate of the head housing 1 opposed to 3.6, a common auxiliary electrode 5.1 is coated in parallel with each of the discharge electrodes 3.1 to 3.6. The discharge point e side of .1 is slightly retreated from the discharge points e1 to e6 in the same manner as the respective discharge electrodes 3.1 to 3.6, and the film is wider than the discharge electrode support member 2. A film is attached almost equally to the left and right widths of the top plate of the head housing 1, and a common auxiliary electrode terminal j1 for drawing out to the outside is bonded to the rear end side of the common auxiliary electrode 5.1.

The lower half of the head housing 1 at the lower side of the figure is a collection path i for collecting the toner liquid.
A suction pump 1 shown in FIG.
1 is provided with a recovery port I for connection to the toner liquid recovery tank 12 via the first port. In the recovery path i, the common auxiliary electrode 5.2 is also film-coated on the upper surface of the bottom plate of the head housing 1 similarly to the upper common auxiliary electrode 5.1, and the common auxiliary electrode 5.2 is provided with a film. A common auxiliary electrode terminal j2 for drawing out to the outside is bonded to the rear end side.

The above-mentioned discharge electrodes 3.1 to 3.
6, each deflection electrode 4.1.1 to 4.1.6, each deflection electrode 4.2.1 to 4.2.6, a common auxiliary electrode 5.1,
The common auxiliary electrode 5.2 is formed by depositing a metal having good conductivity by a vapor deposition method.

In the head driving of the electrostatic ink jet head of the first embodiment having the above-described structure, the toner liquid is supplied to the supply path h by static pressure or supplied by a capillary tube.
Each of the ejection electrodes 3.1 to 3.6 and the deflection electrode 4.1.1 to
By supplying a bias voltage to 4.1.6, the deflection electrodes 4.2.1 to 4.2.6, the common auxiliary electrode 5.1, and the common auxiliary electrode 5.2, the charged colored particles are charged. 6 at each of the discharge points e1 to e6, and further, each of the discharge electrodes 3.1.
To 3.6, a high voltage (ejection voltage) pulse is selectively supplied to each of the ejection points e1 to e6 by Coulomb force.
Printing is performed by selectively flying the charged colored particles 6 on a recording paper 8 (FIG. 8) provided with a minute gap (0.2 mm to 1.0 mm).

That is, FIG. 2A shows the discharge point e (e) of the electrostatic ink jet head of the first embodiment according to the present invention.
1) As shown in an enlarged view in the vicinity, the toner liquid in which the charged colored particles 6 charged to the positive polarity are dispersed flows from the supply path h to the recovery path i at a constant speed, and In the opening 1a, a meniscus 7 in which the center of the tip end of the discharge electrode support member 2 forming the discharge point e (e1) is convex by the toner liquid is formed. Therefore, the head housing 1
An ejection point e (e1 to e6) is provided at an intermediate portion of the meniscus formed by the toner liquid at the opening 1a. At this time, the charged colored particles 6 are almost uniformly dispersed in the toner liquid. Even in this state, by applying a high voltage pulse to the discharge electrode 3, the charged colored particles 6 can fly from the discharge point e (e1). However, as shown in FIG. And common auxiliary electrodes 5.1, 5..
2, a bias voltage having the same polarity as that of the charged colored particles 6 is applied,
Further, by applying a voltage of a higher potential to the common auxiliary electrodes 5.1 and 5.2 than to the discharge electrode 3, the charged colored particles 6
Are widely distributed on the surface of the discharge electrode supporting member 2. In particular, in the vicinity of the discharge point e (e1), the discharge is performed in front of the opening 1a of the head housing 1 more than the upper and lower common auxiliary electrodes 5.1 and 5.2, and the common auxiliary electrodes 5.1 and 5 are discharged. The distribution is concentrated (aggregated) because the distance to .2 is the longest.

Further, as shown in FIG. 2C, when a voltage having a higher potential than that of the discharge electrode 3 is applied to the deflection electrodes 4.1 and 4.2 provided on both the left and right sides of the discharge electrode 3, the potential is reduced. High common auxiliary electrodes 5.1, 5.2 and deflection electrodes 4.1, 4.2
With this, a state surrounding the periphery of the discharge electrode 3 having a low potential is obtained, and each discharge point e (e1) is located at a distance from the common auxiliary electrodes 5.1, 5.2 and the deflection electrodes 4.1, 4.2. Is farthest, the charged colored particles 6 are more densely distributed (aggregated) around the discharge point e (e1), and the charged colored particles 6 are hardly distributed near the middle between the adjacent discharge points e. .

In the first embodiment, the discharge electrode 3
V, a bias voltage of 1250 V was applied to the common auxiliary electrodes 5.1 and 5.2, and a bias voltage of 1100 V was applied to the deflecting electrodes 4.1 and 4.2. The charged colored particles 6 may be aggregated, but may be set to a value at which ejection does not occur only by applying a bias voltage.

As described above, the common auxiliary electrodes 5.1 and 5.2 are provided at positions receded from the discharge point e, and the deflection electrodes 4.1 and 4.2 are provided on the left and right sides of the discharge electrode 3. 3 and the common auxiliary electrodes 5.1, 5.2, and the deflecting electrodes 4.1, 4.2, respectively, by applying a bias voltage to the charged color particles 6 at a high density at the same time and in a short time at the discharge point e. Can be agglomerated. In this state,
If a high voltage pulse (1600 V in the first embodiment) higher than the bias voltage is selectively applied to each of the ejection electrodes 3.1 to 3.6, the charged colored particles 6 are selectively applied from each of the ejection points e1 to e6. It can be ejected.

Since a voltage of the same polarity as that of the charged colored particles 6 is applied to the deflection electrodes 4.1 and 4.2 located between the adjacent discharge points between the discharge points e1 to e6 as described above. The meniscus shape formed between the adjacent discharge points is concave toward the common auxiliary electrode 5.1, 5.2, and the charged colored particles 6 having the same polarity as the charged colored particles 6 move between the adjacent discharge points. Since it is necessary to move in a direction approaching the common auxiliary electrodes 5.1 and 5.2 to which a voltage is applied, the charged colored particles 6 are less likely to move to an adjacent discharge point at the time of discharge. The charged colored particles 6 can be agglomerated and fly (at high concentration or in a short period).

After the discharge of the charged colored particles 6, coagulation occurs again due to Coulomb force (electrophoresis) with each electrode. In the first embodiment, particularly, the discharge point e is near the center of the meniscus, Since the charged colored particles 6 aggregate from both the toner liquid on the h side and the toner liquid on the recovery path i side, aggregation occurs so that the next recording can be performed in a short time.

Further, since the toner liquid containing a large amount of the charged coloring particles 6 (high density) flows from the supply path h toward the discharge point e, sufficient aggregation can be performed in a shorter time.

Further, as shown in FIG. 3, in the electrostatic ink jet head of the first embodiment, the discharge electrodes 3. n
(Where n is a positive number) and the deflection electrodes 4.1. n, 4.
2. n (where n is a positive number) by applying an ejection voltage to the ejection electrode 3. The effective dimension of n is increased, and the charged colored particles 6 can fly more efficiently.

Further, as shown in FIG. 4, the electrostatic ink jet head of the first embodiment is partially modified so that deflection electrodes 4.1.1 are provided on the left and right sides of each of the discharge electrodes 3.1 to 3.6. ~ 4.
Instead of separately providing 1.6, 4.2. 1 to 4.2.6, adjacent deflection electrodes are short-circuited and each of the discharge electrodes 3.1 to 3..
6, one deflection electrode 4.3.1 to 4.3.5 is provided, and one deflection electrode 4.1.1 is provided at the end of the leftmost discharge electrode 3.1 and the other end of the rightmost discharge electrode 3.6. 1. and deflection electrode
2.6, respectively, and these deflection electrodes 4.3.1 are provided.
Even if a bias voltage is applied to 4.3.5, the deflection electrode 4.1.1, and the deflection electrode 4.2.6, the same effect as described above can be obtained.

<Second Embodiment> FIGS. 5A and 5B are views for explaining an electrostatic ink jet head according to a second embodiment of the present invention. FIG. 5A is a front view as viewed from the ejection port side, and FIG. (A) is a vertical sectional view taken along the line BB, and (c) is a bottom view.

The electrostatic ink jet head of the second embodiment shown in FIG. 5 has the same structure as that of the electrostatic ink jet head of the first embodiment described above except for a part thereof. For convenience of description, the same reference numerals are given to the components described above, and differences from the first embodiment will be described.

As shown in FIG. 5, in the electrostatic ink jet head of the second embodiment, a discharge electrode supporting member 2 provided at an intermediate portion in the opening 1a of the head housing 1 is made of a thin plate using an insulator. Are formed on the upper and lower surfaces of the discharge electrode supporting member 2. n, 3. n and deflection electrodes 4.1, n,
4.1, n and deflecting electrodes 4.1, n, 4.2, n (where n is a positive number) are film-formed so as to face each other in the upper and lower directions. At this time, the respective electrodes are slightly receded from the discharge points e (e1 to e6) and are insulated and separated from each other, similarly to the first embodiment.

In the above-described second embodiment, since various electrodes are formed facing the upper and lower surfaces of the discharge electrode support member 2, the film forming process of the discharge electrode support member 2 is increased. The cohesive force and the flying force of the charged colored particles 6 can be made higher than in the first embodiment only by the increase in the number of electrodes as compared with the embodiment.

<Third Embodiment> FIGS. 6A and 6B are views for explaining an electrostatic ink jet head according to a third embodiment of the present invention. FIG. 6A shows the static ink jet head of the third embodiment shown in FIG. It is a horizontal sectional view which cut | disconnected the electric type inkjet head in AA, (b) is a vertical sectional view which cut | disconnected (c) in BB,
(C) is a front view as viewed from the discharge port side.

The electrostatic ink jet head of the third embodiment shown in FIG. 6 has the same configuration as that of the electrostatic ink jet heads of the first and second embodiments described above, except for a part. Here, for convenience of explanation, the same reference numerals are given to the constituent members shown above, and differences from the first and second embodiments will be described.

As shown in FIG. 6, in the electrostatic ink jet head according to the third embodiment, a thin plate is formed by using an insulator for the discharge electrode support member 2 provided at an intermediate portion in the opening 1a of the head housing 1. Are formed on the upper surface of the discharge electrode supporting member 2. n (where n is a positive number), and deflecting electrodes 4.1. n and deflection electrode 4.2. Only n (where n is a positive number) is the discharge electrode 3. n
The film is attached to each of the left and right sides. At this time, each electrode is slightly receded from the discharge point e and is insulated and separated from each other similarly to the first and second embodiments.

In the above-described third embodiment, the discharge electrodes 3. n, deflection electrode 4.1.
n, deflection electrode 4.2. Since n is formed independently on the upper and lower surfaces of the discharge electrode support member 2, the discharge electrode support member 2
Although the number of film-forming manufacturing steps increases, the insulation between the electrodes is increased, and a high voltage can be applied. In addition, the degree of freedom in the shape of the electrodes increases, and even if the gap between the discharge electrodes becomes narrow due to the high density of the discharge points e, the deflection electrodes 4.1. n,
4.2. There is an advantage that n can be formed.

<Fourth Embodiment> FIGS. 7A and 7B are views for explaining an electrostatic ink jet head according to a fourth embodiment of the present invention. FIG. 7A shows the static ink jet head of the fourth embodiment shown in FIG. FIG. 2 is a horizontal cross-sectional view of the electric inkjet head taken along line AA, and FIG. 2B is a front view as viewed from a discharge port side.

The electrostatic ink jet head of the fourth embodiment shown in FIG. 7 has the same configuration as that of the electrostatic ink jet heads of the first to third embodiments described above, except for a part. Here, for convenience of explanation, the same reference numerals are given to the constituent members shown above, and points different from the first to third embodiments will be described.

As shown in FIG. 7, in the electrostatic ink jet head of the fourth embodiment, a discharge electrode supporting member 2 provided at an intermediate portion in the opening 1a of the head housing 1 is made of a thin plate using an insulator. The even numbered ejection electrodes 3.2, 3.4, and 3.6 are formed on the upper surface of the ejection electrode support member 2 and the even numbered ejection electrodes are formed on the lower surface of the ejection electrode support member 2. Odd-numbered discharge electrodes 3.1, 3.3, and 3.5 are provided between them. Further, the deflection electrodes 4.1.1 to 4.1, 6 and the deflection electrodes 4.1.1 are provided on both left and right sides of each of the ejection electrodes 3.1 to 3.6.
2.1 to 4.2, 6 are applied. At this time, each electrode is connected to the discharge point e in the same manner as in the first to third embodiments.
, And are slightly separated from each other to form an insulating film.

The odd-numbered discharge electrodes may be formed on the upper surface of the discharge electrode support member 2 and the even-numbered discharge electrodes may be formed on the lower surface of the discharge electrode support member 2.

In the above-described fourth embodiment, the discharge electrodes 3. are alternately provided on the upper and lower surfaces of the discharge electrode support member 2. n (where n is a positive number)
Is applied, so that the number of manufacturing steps for forming the film of the discharge electrode supporting member 2 increases, but the density of each of the discharge points e1 to e6 can be increased.

In the first to fourth embodiments, the common auxiliary electrodes 5.1 and 5.2 are also provided with the deflecting electrodes 4.1, 4.2 and 5.2 in order to enhance the aggregation effect of the charged colored particles 6. (4.
The bias voltage was also applied to 3), but the above two effects (high-density and high-speed agglomeration of the charged colored particles 6 and a reduction in the amount of movement to the adjacent point) were caused by either the common auxiliary electrode or the deflection electrode Can be obtained simply by applying a bias voltage. Further, the common auxiliary electrodes 5.1, 5.2
Is not two, but only one of them is effective. Even in a head having only one ejection point e, it is effective to use a common auxiliary electrode or a deflection electrode for high density and high speed aggregation of the charged colored particles 6.

<Fifth Embodiment> FIGS. 8A and 8B are views for explaining a method of driving an electrostatic ink jet head according to the present invention, in which a discharge point e1 located at an end and a discharge point e4 located near the center are shown. FIG. 9 is an enlarged plan view of the vicinity.
FIG. 4 is a view for explaining another method of driving the electrostatic inkjet head according to the present invention. In the state shown in FIGS. 8A and 8B, the deflection electrodes 4.1. n, 4.2. A state in which a discharge voltage is applied to the discharge electrode 3.1 and the discharge electrode 3.4 in a state where an equal voltage is applied to n (or a state in which no voltage is applied to both), and the charged colored particles 6 fly. Is shown. At this time, in the vicinity of the discharge point e4, the electric field is evenly distributed to the left and right, and the charged colored particles 6 are discharged by the uniform Coulomb force.
4 fly straight toward the recording medium 8. On the other hand, in the vicinity of the discharge point e1 at the left end, the electric field distribution becomes non-uniform in the left and right, and the charged colored particles are distributed in the electrodes (the deflection electrodes 4.2.1,
(The deflection electrode 4.1.2 and the discharge electrode 3.2, etc.) strongly receive the Coulomb repulsion and fly toward the outside (left side) of the electrode array.

Next, in the state shown in FIG. 8D, the deflection electrodes 4.1. n and the deflection electrode 4.2. n, and apply a potential difference to the deflection electrodes 4.2. n have deflection electrodes 4.1. In the state where a voltage lower than n is applied (or no voltage is applied), a state is shown in which the discharge voltage is applied to the discharge electrode 3.4 and the charged colored particles 6 fly. At this time, in the vicinity of the ejection point e4, the electric field distribution becomes uneven right and left, and the charged coloring particles 6 receive a stronger Coulomb repulsive force from the left (deflection electrode 4.1.4) side, and the right side of the recording medium 8 Fly toward and land. At this time, if an initial design value such as a distance between the ejection point e4 and the recording medium 8 and a voltage value of a high voltage (ejection voltage) pulse applied to the ejection electrode 3.4 is determined, a deviation amount of the landing position (deflection). Amount) is determined by the deflection electrodes 4.1. n,
4.2. Since it is experimentally obtained as a unique function of the voltage (deflection voltage) applied to n, it is possible to control this.

Therefore, as shown in FIG. 8 (c), an appropriate voltage is applied to the deflection electrode 4.1.1 to the discharge point e1 at the left end, so that the deflection electrode 4.1.1 is applied. Between the Coulomb repulsive force generated between the electrodes and other electrodes (deflection electrode 4.2.1, deflection electrode 4.1.2, discharge electrode 3.2, etc.) located on the right side of discharge point e1. The charged colored particles 6 fly straight from the discharge point e1 toward the recording medium 8 or the landing position is in front of the discharge point e1 even if the flight path is not linear. Can be located.

In this embodiment, the size of the deflecting electrode 4.1.1 is the same as that of the other deflecting electrodes.
By increasing the size of the leftmost deflecting electrode 4.1.1 as shown by, the potential difference given to the deflecting electrode 4.2.1 can be reduced or eliminated. In addition, when the purpose is only to correct the flight direction at the end of the discharge point, the deflection electrodes may be provided only on the discharge electrodes located at both ends. Further, as shown in FIG. Alternatively, only the outside of the leftmost discharge electrode 3.1 and the rightmost discharge electrode 3.6 may be used.

In this embodiment, the object of correction has been described as being one point at each end, but a plurality of discharge points at the ends are, for example, as shown in FIG. 4.1. n, 4.2. The voltage applied to the outer discharge point is increased as shown in FIG.
As shown in FIG. 9B, the shape of the deflection electrode is increased toward the outer ejection point even if the applied voltage applied to the deflection electrode is the same, or the distance between the deflection electrode and the ejection point is increased as shown in FIG. By shortening the distance to the outer ejection point, it is possible to perform more accurate correction for the entire electrostatic ink jet head, and to make the landing positions of the flying charged colored particles on the recording paper closer to the uniform intervals. Further, as shown in FIG. 1C, the common auxiliary electrodes 5.1 and 5.2 are provided so as to sandwich the discharge electrode row.
Are formed so as to extend from both ends of the arrangement of the discharge electrode rows to the outside, thereby correcting the electric field distribution near the discharge points located at the ends, and thereby deflecting electrodes 4.1.1 and 4.1.1.
2.1 can be reduced or eliminated.

Further, as shown in the side view of FIG. 5A, for example, the ends of the common auxiliary electrodes 5.1 and 5.2 are bent inward or the effective electrode thickness is increased. By forming the distance between the electrodes to be small, or as shown in the plan view of FIG. 5C, the shape of the end surface of the common auxiliary electrode 5.1, 5.2 on the discharge point side is not a straight line but a central portion. Then, the discharge points e1 to e6 and the common auxiliary electrodes 5.1 and 5.2 are used.
The distance between the common auxiliary electrode and the discharge point e1, which is given to the discharge points at both ends, is intentionally increased by forming the distance to the discharge point e short at both ends. charged colored particles 6 flying from e6
Can be corrected (straight).
Furthermore, by combining two or more features such as the length, thickness, end face shape, and inter-electrode distance of the common auxiliary electrode as described above, or combining one of them so as to have the opposite effect, It is also possible to correct the flight direction of the whole type ink jet head.

<Sixth Embodiment> FIG. 10 is a schematic view for explaining an electrostatic ink jet recording apparatus according to the present invention, and FIG. 11 is an electrostatic ink jet recording apparatus according to the present invention. FIG. 12 is a timing chart for explaining a method of driving a head. FIG. 12 is a schematic diagram for explaining a method of driving an electrostatic ink jet head in the electrostatic ink jet recording apparatus according to the present invention.
FIG. 3 is a schematic diagram for explaining another driving method of the electrostatic ink jet head in the electrostatic ink jet recording apparatus according to the present invention.

A method for driving an electrostatic ink jet head and an electrostatic ink jet recording apparatus according to the present invention are described below.
This will be described with reference to FIGS. For convenience of explanation,
The description of the components of the electrostatic ink jet head is the same as that of the components described above.

Here, in order to simplify the description, the discharge points of the electrostatic ink jet head are six points,
It is assumed that the line data is 30 pixels, and the gradation of each pixel is 3 bits, and the 1-line memory 13 has already stored print data for one line. Switching of each switch circuit and data transfer between blocks are controlled by a control circuit (CPU) (not shown).

In FIG. 10, reference numeral 9 denotes the first to the above-described first to fifth embodiments.
FIG. 13 is a schematic diagram of an electrostatic inkjet head to which any of the fourth embodiments is applied, and a supply port H for supplying a toner liquid;
3. A collection port I for collecting this, each discharge electrode terminal f1 to f6 corresponding to each discharge point e1 to e6, each deflection electrode 4.
1. n, the deflection electrode terminal g1 having a short-circuited connection, and similarly each of the deflection electrodes 4.2. n is connected to other components by a deflection electrode terminal g2 to which n is short-circuited, a common auxiliary electrode terminal j1 and a common auxiliary electrode terminal j2, and the like. First, as a printing preparation stage, a toner liquid in which colored particles 6 charged to the positive polarity are dispersed in an insulating liquid is put in the toner liquid supply tank 10. The ink is supplied into the inkjet head 9. The supplied toner liquid forms a meniscus at the opening of the electrostatic ink jet head 9, passes through the discharge point e (e 1 to e 6), or its vicinity, passes through the recovery path i, and has a constant flow rate by the pump 11. To the collection tank 12. On the other hand, the print data for one line is equivalent to six pixels (1, 6, 11, 16, 16) obtained by thinning out every five pixels from the address 1 of the one-line memory 13.
21 and 26) are transferred to the shift register 14. The printing operation is performed by applying a voltage to the ejection electrode, the deflection electrode, and the common auxiliary electrode.

Here, in this embodiment, first, the head drive power supply circuit 17 is turned on and the switching transistors Q1 to Q6 are turned on, so that the output (ejection voltage Vjt) of the head drive power supply circuit 17 is reduced. Ra, R
The DC voltage Vst divided in b is applied to each ejection electrode as a bias voltage. On the other hand, three types of deflection voltages Vh0 and Vh are applied to the deflection electrode via the first switch circuit 18.
1, the highest voltage Vh2 of Vh2 (Vst <Vh0 <Vh1 <Vh2) is applied to the deflection electrode 4.2, and the lowest voltage Vh0 is applied to the deflection electrode 4.1. The voltage applied to the common auxiliary electrode will be described later.

In this state, print data for six pixels is latched by the latch circuit 15 from the shift register 14, and the pulse width modulation circuit 16 is output from the latch circuit 15 based on a synchronization signal from a control circuit (not shown). A negative pulse of a length corresponding to the value (3 bits) of each print data
It is supplied to the bases of the switching transistors Q1 to Q6 and turned off. As a result, the ejection electrode
Instead of the bias voltage applied up to that time, the ejection voltage Vjt is applied for a time corresponding to each print data. FIG. 11 shows the states of the voltages applied to the deflection electrode terminals g1 and g2 and the voltages applied to the ejection electrode terminals f whose print data is "2" and "5". As a result, from the discharge point e, the charged colored particles 6 in an amount corresponding to the print data fly toward the recording paper 8 arranged near the discharge point e. At this time, the flight direction is bent by the deflection electrode, and the landing position on the recording paper is the position a in FIG. Thus, printing of 1/5 of one line is completed. Further, while the pulse width modulation circuit 16 is operating, in preparation for the next printing, six pixels (addresses 2, 7, 12, 17, 22, and 27) obtained by thinning out the address 2 from the address 2 every 5 pixels. ) Is transferred to the shift register 14.

Next, an intermediate voltage Vh is applied to the deflection electrode 4.1.
1 is applied, and the latch circuit 15 outputs the second print data stored in the shift register 14 to the pulse width modulation circuit 16. The pulse width modulation circuit 16 generates a negative polarity pulse in the same manner as the previous time, and from the ejection point e, 2, 7, 12,
The charged colored particles 6 corresponding to the print data at addresses 17, 22, and 27 fly, but land at the position b in FIG. 12 because the potential difference between the deflecting electrodes 4.1 and 4.2 is small this time. Up to this point, 2/5 printing of one line is completed. Also in this case, while the pulse width modulation circuit 16 is operating, in preparation for the next printing, six pixels (3, 8, 13, 18, 2,
(3, 28) is transferred to the shift register 14.

At the third time, an intermediate voltage Vh1 is applied to both the deflection electrodes 4.1 and 4.2, and the pulse width modulation circuit 16 outputs a negative polarity pulse corresponding to the third printing data. Printing is performed at the position of c in FIG. After that, 4
By applying Vh2 to the deflecting electrode 4.1 and Vh1 to the deflecting electrode 4.2, the fourth print data (addresses 4, 9, 14, 19, 24, and 29) is applied to the position of d in FIG. Data), and the fifth time, Vh2,
By applying Vh0 to the deflection electrode 4.2, e of FIG.
At the position of the fifth print data (5, 10, 15, 20,
25, 30) are printed.

As a result, data for one line (30 pixels) is printed at a pitch (5 times the resolution) of the ejection point interval p. Here, in the present embodiment, the deflection electrodes are arranged on both sides of the ejection electrode, and the charged colored particles 6 fly on both sides of the ejection point to achieve high resolution. However, the deflection electrode is made to fly only on one side of the ejection point to achieve high resolution. In this case, as shown in FIG. 13, this can be realized also by an electrostatic ink jet head structure in which a deflection electrode is arranged on only one side.

Similarly to the deflection electrodes, three types of voltages are applied in combination to common auxiliary electrodes 5.1 and 5.2 which are arranged so as to sandwich the discharge electrode from above and below.
Since five (or more) impact points can be set in a direction perpendicular to the direction in which the ejection points are arranged, which corresponds to the relative movement direction between the electrostatic inkjet head and the recording paper,
Printing can be performed at intervals smaller than the relative movement interval (step) between the electrostatic ink jet head and the recording paper.

Further, the voltages of the deflection electrode and the common auxiliary electrode are:
Since they can be set independently of each other, if these are combined appropriately, the landing position can be set in any diagonal direction.
It is also possible to arrange the print dots with.

[0062]

According to the electrostatic ink jet head, the electrostatic ink jet driving method, and the electrostatic ink jet recording apparatus of the present invention described in detail above, the intermediate portion in the opening of the head housing formed in a substantially rectangular shape. A discharge electrode support member formed by protruding a plurality of discharge points to form a substantially linear (linear) array, and each discharge electrode corresponding to each discharge point on the discharge electrode support member; Deflection electrodes are attached to the left and right of each discharge electrode, and
A common auxiliary electrode is formed above and below the opening of the head housing with the ejection electrode support member interposed therebetween, and a toner liquid in which charged and colored particles are dispersed is supplied to the opening of the head housing, and a bias voltage is applied to each ejection electrode. Is applied to each of the discharge points, without being affected by the adjacent discharge electrodes, to agglomerate the charged colored particles at a high speed and a high density, and a discharge voltage is selectively applied to each of the discharge points. Thus, the charged colored particles can fly selectively. In addition, since a plurality of electrodes contributing to aggregation are provided in the vicinity of the ejection point and the ejection electrode so as to surround the periphery, the electrodes are instantaneously aggregated even at a low potential difference, and spontaneous ejection does not occur without insulating the electrode and ink. In addition, by applying a bias voltage to a common auxiliary electrode provided so as to sandwich the entire discharge point, the flying direction of the charged colored particles flying from the end of the discharge point is made closer to the straight traveling direction, and the vicinity of the discharge point at the end is obtained. By applying a bias voltage to the provided deflecting electrode, it becomes possible to deflect the flying direction of the charged colored particles flying from the end of the discharge point in the straight traveling direction. Also,
Deflection electrodes are provided in the vicinity of all ejection points, multiple types of bias voltages are applied to them, and multiple types of flight directions and landing positions are intentionally controlled to deflect, enabling higher-resolution recording than the interval between ejection points. Become.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an electrostatic inkjet head according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining an operation near a discharge point of the electrostatic inkjet head according to the first embodiment of the present invention.

FIG. 3 is a circuit diagram showing a circuit for applying an ejection voltage to a deflection electrode simultaneously with an ejection electrode in the electrostatic inkjet head according to the first embodiment of the present invention.

FIG. 4 is a plan view showing a state where the electrostatic ink jet head of the first embodiment according to the present invention is partially modified, and adjacent deflection electrodes between respective ejection electrodes are short-circuited.

FIG. 5 is a view for explaining an electrostatic inkjet head according to a second embodiment of the present invention.

FIG. 6 is a view for explaining an electrostatic inkjet head according to a third embodiment of the present invention.

FIG. 7 is a view for explaining an electrostatic inkjet head according to a fourth embodiment of the present invention.

FIG. 8 is a diagram for explaining a method of driving the electrostatic inkjet head according to the present invention.

FIG. 9 is a diagram for explaining another driving method of the electrostatic ink jet head according to the present invention.

FIG. 10 is a schematic diagram for explaining an electrostatic ink jet recording apparatus according to the present invention.

FIG. 11 is a timing chart for explaining a method of driving an electrostatic ink jet head in the electrostatic ink jet recording apparatus according to the present invention.

FIG. 12 is a schematic diagram for explaining a method of driving an electrostatic ink jet head in the electrostatic ink jet recording apparatus according to the present invention.

FIG. 13 is a schematic diagram for explaining another driving method of the electrostatic ink jet head in the electrostatic ink jet recording apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Head housing, 1a ... Opening part 2, ... Discharge electrode support member, 3 (3.1-3.6) ... Discharge electrode, 4.1. n
(4.1.1 to 4.1.6) ... deflection electrode, 4.2. n
(4.2.1 to 4.2.6) ... deflection electrode, 5.1 ... common auxiliary electrode, 5.2 ... common auxiliary electrode, 6 ... charged colored particles,
9 electrostatic ink jet head H supply port, I recovery port, e (e1 to e6) discharge point, h supply path, i
... recovery path.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C056 EA01 EA04 EA23 EA24 EC03 EC07 FA07 2C057 AF29 AF34 AF43 AG22 AG92 AG93 AH07 AM03 AM17 AR06 BD06

Claims (50)

[Claims] 1. A toner liquid in which charged colored particles are dispersed is supplied to an opening of a head housing, and one or substantially linear shape for flying charged colored particles from the toner liquid is provided near the opening. An electrostatic ink jet head having a plurality of ejection points arranged, wherein an ejection point is provided at an intermediate portion of a meniscus formed by a toner liquid at an opening. 2. A toner liquid in which charged colored particles are dispersed is supplied to an opening of a head housing, and one or substantially linear shape for flying charged colored particles from the toner liquid is provided near the opening. In an electrostatic inkjet head having a plurality of ejection points arranged, the head opening is divided into two regions by an ejection electrode support member, and ejection points are provided on the ejection electrode support member. Electrostatic inkjet head. 3. A toner liquid in which charged colored particles are dispersed is supplied to an opening of a head housing, and one or substantially linear shape for flying charged colored particles from the toner liquid is provided near the opening. In an electrostatic ink jet head having a plurality of discharge points arranged, the head opening is divided into two regions by a discharge electrode supporting member forming the discharge points, and one of the regions is for supplying a toner liquid. And a collection port for collecting the toner liquid is provided on the other side. 4. An electrostatic ink-jet head according to claim 1, wherein recording is performed in the vicinity of a discharge point while a toner liquid flows. Head driving method. 5. A method for driving an electrostatic ink jet head, comprising the electrostatic ink jet head according to claim 1, and applying the method for driving an electrostatic ink jet head according to claim 4. Electrostatic ink jet recording device. 6. A toner liquid in which charged colored particles are dispersed is supplied to an opening of the head housing, and is arranged in a substantially linear shape near the opening to fly the charged colored particles from the toner liquid. In an electrostatic ink jet head having a plurality of ejection points, a meniscus shape formed by a toner liquid between adjacent ejection points protrudes from an end surface of a head housing forming an opening near an ejection point, and an adjacent ejection point. An electrostatic ink jet head wherein discharge points are formed so as to be closer to an end surface of a head housing forming an opening from near a discharge point between points. 7. The electrostatic ink jet head according to claim 6, wherein the head case forming the opening is substantially parallel to the discharge point row so as to sandwich the discharge point row.
An electrostatic ink jet head comprising two common auxiliary electrodes. 8. A toner liquid in which charged colored particles are dispersed, one or a plurality of substantially linearly arranged discharge points for flying charged colored particles from the toner liquid, and the discharge points. In an electrostatic ink jet head having discharge electrodes corresponding to the above, a deflection electrode is provided at a position retreated from a discharge point of a discharge electrode supporting member supporting the discharge electrode, and the deflection electrodes are located on both sides of each discharge electrode. An electrostatic ink-jet head characterized in that it is provided in. 9. A toner liquid in which charged colored particles are dispersed is supplied, and a plurality of substantially linearly arranged discharge points for causing the charged colored particles to fly from the toner liquid, and a plurality of discharge points corresponding to the discharge points. In an electrostatic ink jet head having ejection electrodes, a deflection electrode is provided at a position receded from an ejection point of an ejection electrode support member supporting the ejection electrode, and the deflection electrode is positioned between each of the plurality of ejection electrodes. An electrostatic ink-jet head characterized in that it is provided in. 10. An electrostatic ink jet head according to claim 8, wherein the discharge electrode and the deflection electrode are provided on the same surface of the discharge electrode support member. 11. An ink jet head according to claim 8, wherein the discharge electrode and the deflection electrode are provided separately on different surfaces of the discharge electrode support member. head. 12. A toner liquid in which charged colored particles are dispersed is supplied to an opening of a head housing, and one or substantially linear shape for causing the charged colored particles to fly from the toner liquid is provided near the opening. In an electrostatic ink jet head having a plurality of arranged ejection points and ejection electrodes corresponding to the ejection points, the opening of the head housing is divided into two regions by an ejection electrode supporting member forming the ejection points. And an ejection electrode provided on both surfaces of the ejection electrode support member facing each of the regions. 13. An electrostatic ink jet head according to claim 12, wherein two ejection electrodes corresponding to one ejection point are provided, and said ejection electrodes are provided on both sides of the ejection electrode support member forming the ejection point. An electrostatic ink jet head, characterized in that: 14. An electrostatic ink jet head according to claim 12, wherein discharge electrodes corresponding to respective discharge points are alternately provided on both surfaces of a discharge electrode supporting member forming the discharge points. Electric inkjet head. 15. An ejection head according to claim 6, wherein a first voltage that does not lead to ejection and a second voltage that leads to ejection are input to the ejection electrode. A third voltage which is intermediate between the first voltage and the second voltage and does not lead to ejection is applied to the deflection electrode and selectively applied to the deflection electrode, and the third voltage is applied to the ejection electrode. A method for driving an electrostatic ink jet head, wherein at least one voltage application period and a third voltage application period to the deflection electrode are simultaneously applied. 16. An electrostatic ink jet head according to claim 6, wherein a first voltage that does not lead to discharge and a second voltage that leads to discharge are applied to the discharge electrode. A third voltage which is intermediate between the first voltage and the second voltage and does not lead to ejection is applied to the deflection electrode and selectively applied to the deflection electrode, and the third voltage is applied to the ejection electrode. 2. The method of driving an electrostatic ink jet head according to claim 2, wherein the voltage application period includes a period in which adjacent ejection electrodes are applied at least simultaneously. 17. The method according to claim 6, wherein a first voltage that does not lead to discharge and a second voltage that leads to discharge are applied to the discharge electrode. A third voltage, which is intermediate between the first voltage and the second voltage and does not lead to ejection, and the second voltage are applied to the deflection electrode while being selectively switched according to the signal. Is selectively switched and applied according to
A second voltage application period to the ejection electrode and a second voltage application period to the deflection electrode
Wherein said voltage application period includes at least a period of simultaneous application. 18. A driving method for an electrostatic ink jet head according to claim 15, comprising the electrostatic ink jet head according to any one of claims 6 to 14. An electrostatic ink jet recording apparatus characterized by applying the method. 19. A toner liquid in which charged colored particles are dispersed, and a plurality of substantially linearly arranged ejection points for flying charged colored particles from the toner liquid;
In an electrostatic ink jet head having ejection electrodes corresponding to the ejection points, two common auxiliary electrodes are provided substantially parallel to the ejection point row so as to sandwich the ejection point row at a position retreated from the ejection point, The length of the two common auxiliary electrodes is different from the length of the ejection point row, and at least a part thereof is formed to the outside of the ejection point row. 20. A toner liquid having charged colored particles dispersed therein is supplied, and a plurality of substantially linearly arranged ejection points for flying charged colored particles from the toner liquid;
In an electrostatic ink jet head having ejection electrodes corresponding to the ejection points, two common auxiliary electrodes are provided substantially parallel to the ejection point row so as to sandwich the ejection point row at a position retreated from the ejection point, The distance between the electrodes of these two common auxiliary electrodes is not the same in all parts,
An electrostatic ink jet head characterized in that at least a part thereof is formed narrower than a distance between electrodes near a center. 21. A toner liquid having charged colored particles dispersed therein is supplied, and a plurality of substantially linearly arranged ejection points for causing the charged colored particles to fly from the toner liquid;
In an electrostatic ink jet head having ejection electrodes corresponding to the ejection points, two common auxiliary electrodes are provided substantially parallel to the ejection point row so as to sandwich the ejection point row at a position retreated from the ejection point, The effective thickness of the two common auxiliary electrodes is not the same at all portions, and at least a portion thereof is formed to be thicker than the thickness near the center. 22. A toner liquid in which charged colored particles are dispersed, a plurality of substantially linearly arranged ejection points for flying charged colored particles from the toner liquid, and
In an electrostatic ink jet head having ejection electrodes corresponding to the ejection points, two common auxiliary electrodes are provided substantially parallel to the ejection point row so as to sandwich the ejection point row at a position retreated from the ejection point, The distance from each discharge point to the common auxiliary electrode end face is not the same at all discharge points, and at least a part thereof is formed so as to be shorter than the distance from the discharge point near the center to the common auxiliary electrode end face. Characteristic electrostatic ink jet head. 23. A toner liquid having charged colored particles dispersed therein is supplied, and a plurality of substantially linearly arranged discharge points for causing the charged colored particles to fly from the toner liquid;
Having an ejection electrode corresponding to this ejection point, and sandwiching the ejection point row at a position retracted from the ejection point,
In an electrostatic ink jet head provided with two common auxiliary electrodes substantially parallel to the discharge point row, 1) the length of the common auxiliary electrode and the length of the discharge point row are different. 2) The distance between the electrodes of the common auxiliary electrode is one. 3) The thickness of the common auxiliary electrode is partially different. 4) The distance from each discharge point to the end face of the common auxiliary electrode is partially different. Electrostatic inkjet head. 24. A toner liquid in which charged colored particles are dispersed is supplied to an opening of a head housing, and is arranged in a substantially linear shape near the opening to fly charged colored particles from the toner liquid. In an electrostatic ink jet head having a plurality of discharge points, a deflection electrode for changing a flying direction of charged colored particles by applying a predetermined potential is provided near an end discharge point. Electrostatic inkjet head. 25. A toner liquid in which charged colored particles are dispersed is supplied to an opening of a head housing, and is arranged in a substantially linear manner in the vicinity of the opening for causing the charged colored particles to fly from the toner liquid. In an electrostatic ink-jet head having a plurality of discharge points, a deflection electrode for changing the flying direction of the charged colored particles by applying a predetermined potential to the vicinity of the plurality of discharge points including the end discharge points. An electrostatic ink jet head characterized by being provided. 26. A toner liquid in which charged colored particles are dispersed is supplied to an opening of a head housing, and is arranged in a substantially linear manner in the vicinity of the opening for causing the charged colored particles to fly from the toner liquid. In an electrostatic ink jet head having a plurality of discharge points, a deflecting electrode for changing a flying direction of charged colored particles by applying a predetermined potential is provided near all the discharge points. Electric inkjet head. 27. The electrostatic ink-jet head according to claim 24, wherein a pair of deflection electrodes is provided on both sides of each discharge point. 28. The electrostatic ink jet head according to claim 24, wherein one deflection electrode is provided outside each discharge point. 29. The electrostatic ink jet head according to claim 25, wherein one deflection electrode is provided between each discharge point and outside each of the discharge points at both ends. Electrostatic inkjet head. 30. The electrostatic ink jet head according to claim 25, wherein the shape of the deflecting electrode is varied depending on the location. 31. The electrostatic ink jet head according to claim 25, wherein the shape of the deflecting electrode located at the end of the array of ejection points is larger than that of the deflecting electrode located elsewhere. Characteristic electrostatic ink jet head. 32. An electrostatic ink jet head according to claim 25, wherein the distance between the deflection electrode and the discharge point is varied depending on the location. 33. The electrostatic ink jet head according to claim 25, wherein the distance between the deflecting electrode located at the end of the array of ejection points and the deflecting electrode located at another location is determined. An electrostatic ink jet head characterized by being shorter than a distance from a discharge point. 34. The method according to claim 24, wherein a uniform potential is applied to each deflection electrode when flying the charged colored particles from each discharge point using the electrostatic ink jet head according to claim 24. Characteristic method for driving an electrostatic ink jet head. 35. When using the electrostatic ink jet head according to any one of claims 24, 25, and 26 to fly charged colored particles from each discharge point, at least one of the deflection electrodes is connected to another deflection electrode. A method for driving an electrostatic ink jet head, wherein a potential different from that of a deflection electrode is applied. 36. When the charged colored particles fly from each discharge point using the electrostatic ink jet head according to claim 28, each deflecting electrode has the same polarity as the charged colored particles. A method for driving an electrostatic ink jet head, wherein a potential is applied. 37. An electrostatic ink jet head comprising the electrostatic ink jet head according to claim 24, wherein the electrostatic ink jet head and a recording medium face each other. An electrostatic discharge method wherein the flying positions of the flying charged colored particles on the recording medium are made uniform by applying the electrostatic ink jet head driving method according to any one of claims 34 and 35. Type inkjet recording device. 38. An electrostatic ink jet head having a supply of a toner liquid in which charged colored particles are dispersed, and having a plurality of substantially linearly arranged discharge points for flying the charged colored particles from the toner liquid. 3. The electrostatic ink jet head according to claim 1, wherein a deflection electrode is provided on one and the same side in the arrangement direction of each ejection point. 39. The method according to claim 38, wherein at least two types of potentials are switched and applied to each of the deflection electrodes when the charged colored particles fly from each of the discharge points using the electrostatic ink jet head according to claim 38. A method for driving an electrostatic inkjet head. 40. An electrostatic ink jet head having a supply of a toner liquid in which charged colored particles are dispersed, and having a plurality of substantially linearly arranged discharge points for flying the charged colored particles from the toner liquid. 3. The electrostatic ink jet head according to claim 1, wherein deflection electrodes are provided on both sides in the arrangement direction of each ejection point. 41. When the charged colored particles fly from each discharge point using the electrostatic ink jet head according to claim 40, two or more potentials are switched and applied to at least one of the deflection electrodes. A method for driving an electrostatic ink jet head, comprising: 42. The method of driving an electrostatic ink jet head according to claim 39, wherein the switching of two or more types of potentials applied to the deflection electrode is performed by one flight of the charged colored particles from the discharge point. A method for driving an electrostatic ink jet head, wherein the method is performed in units of: 43. An electrostatic ink jet head according to claim 38 or 40, wherein said electrostatic ink jet head and a recording medium are opposed to each other.
By applying the driving method of the electrostatic ink jet head according to claim 9 or 41, two or more different landing positions are provided on the recording medium for one ejection point. An electrostatic ink jet recording device. 44. An electrostatic ink jet head according to claim 38 or 40, wherein said electrostatic ink jet head and a recording medium are opposed to each other.
9 or 41, (m-1) different landing positions are provided between the landing positions corresponding to the adjacent ejection points, and the continuous m Wherein a plurality of data are recorded while sequentially changing landing positions from one ejection point, and recording corresponding to nxm data is performed by a head having n ejection points. apparatus. 45. A toner liquid in which charged colored particles are dispersed, and a plurality of substantially linearly arranged ejection points for flying charged colored particles from the toner liquid;
When using an electrostatic inkjet head having at least one common auxiliary electrode substantially in parallel with the arrangement direction of the discharge points, and flying charged colored particles from each discharge point, at least two types of common auxiliary electrodes are used. A method for driving an electrostatic ink jet head, characterized in that the potential is switched and applied. 46. A toner liquid in which charged colored particles are dispersed, and a plurality of substantially linearly arranged ejection points for flying charged colored particles from the toner liquid;
An electrostatic ink jet head having at least one common auxiliary electrode substantially parallel to the direction in which the ejection points are arranged, and the electrostatic ink jet head and a recording medium are opposed to each other. By applying the driving method of the electrostatic ink jet head described above, two or more different landing positions are provided on a recording medium for one ejection point. . 47. An electrostatic ink jet head having a supply of a toner liquid in which charged colored particles are dispersed, and having a plurality of substantially linearly arranged discharge points for flying the charged colored particles from the toner liquid. In at least one of the first points, substantially parallel to the arrangement direction of the ejection points.
An electrostatic ink jet head comprising: a plurality of deflecting electrodes; and a second deflecting electrode provided between each ejection point on at least one of the same sides in the arrangement direction. 48. A discharge point arrangement direction and a direction perpendicular to the discharge point arrangement direction by applying a predetermined potential to each of the first deflection electrode and the second deflection electrode using the electrostatic ink jet head according to claim 47. In a diagonal direction different from,
A method for driving an electrostatic ink jet head, characterized by flying charged colored particles. 49. The electrostatic ink jet head according to claim 47, wherein the electrostatic ink jet head is provided for each type of charged colored particles, and the electrostatic ink jet head and the recording medium are opposed to each other. An electrostatic ink jet recording apparatus characterized in that a flying direction of each type of charged colored particles is made different by applying a driving method of an electric ink jet head. 50. An electrostatic ink jet head is provided for each type of charged colored particles, and the charged colored particles fly on a recording medium facing the electrostatic ink jet head.
48. An electrostatic ink jet recording apparatus for performing recording by landing, wherein at least one of the first deflection electrode and the second deflection electrode according to claim 47 is provided. Is provided for at least any type of charged colored particles,
By applying a predetermined potential to the deflecting electrode, at least one of the charged colored particles is landed at a position different from other charged colored particles.