JPH068047B2 - Inkjet recording device - Google Patents
Inkjet recording deviceInfo
- Publication number
- JPH068047B2 JPH068047B2 JP59176811A JP17681184A JPH068047B2 JP H068047 B2 JPH068047 B2 JP H068047B2 JP 59176811 A JP59176811 A JP 59176811A JP 17681184 A JP17681184 A JP 17681184A JP H068047 B2 JPH068047 B2 JP H068047B2
- Authority
- JP
- Japan
- Prior art keywords
- ink
- recording
- density
- nozzle
- piezoelectric element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/205—Ink jet for printing a discrete number of tones
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明はインクジェット記録装置に関するものであ
る。TECHNICAL FIELD The present invention relates to an inkjet recording device.
第５図は従来のインクジエツトヘツドを示す説明図であ
り、図において(1)はインク供給系、(2)は可撓壁、(3)
は圧力室、(4)は圧電素子、(5)はノズルである。FIG. 5 is an explanatory view showing a conventional ink jet head, in which (1) is an ink supply system, (2) is a flexible wall, and (3)
Is a pressure chamber, (4) is a piezoelectric element, and (5) is a nozzle.
従来のインクジエツトヘツドは上記のように構成され、
たとえば圧電素子(4)にパルス状の電界を印加すると、
圧電素子(4)が変形して、可撓壁(2)にたわみを生じさせ
る。この可撓壁(2)のたわみにより圧力室(3)の内圧が急
上昇し、圧力室(3)内のインクがノズル(5)から噴射す
る。圧電素子(4)に印加していた電界を解除すると、圧
電素子(4)の形状が復元し、可撓壁(2)の形状が復元し、
圧力室(3)の体積が拡大し、その結果、インク供給系(1)
から圧力室(3)にインクが補充される。The conventional ink jet head is constructed as described above,
For example, if a pulsed electric field is applied to the piezoelectric element (4),
The piezoelectric element (4) is deformed, causing the flexible wall (2) to bend. Due to the bending of the flexible wall (2), the internal pressure of the pressure chamber (3) rapidly rises, and the ink in the pressure chamber (3) is ejected from the nozzle (5). When the electric field applied to the piezoelectric element (4) is released, the shape of the piezoelectric element (4) is restored, and the shape of the flexible wall (2) is restored,
The volume of the pressure chamber (3) is expanded, and as a result, the ink supply system (1)
Ink is replenished from the pressure chamber (3).
ここで階調記録をする場合、インクは低濃度のものを使
用し、階調は同一画素に噴射するインク量で制御する。
噴射するインク量は圧電素子(4)に印加する電圧、パル
ス幅、パルス密度などで制御する。高濃度の記録をする
場合には噴射するインク量を増やす。噴射するインク量
を増やすためにはインク粒子の径を大きくするか、イン
ク粒子の滴数を多くする。インク粒子の径を大きくする
ためには圧電素子(4)に印加する電圧を高くするか、パ
ルス幅を長くする。インク粒子の滴数を多くするために
は圧電素子(4)に印加するパルス密度を高くする。When gradation recording is performed here, low density ink is used and gradation is controlled by the amount of ink ejected to the same pixel.
The amount of ejected ink is controlled by the voltage applied to the piezoelectric element (4), the pulse width, the pulse density, and the like. When performing high density recording, the amount of ejected ink is increased. In order to increase the amount of ink to be ejected, the diameter of ink particles is increased or the number of drops of ink particles is increased. To increase the diameter of the ink particles, the voltage applied to the piezoelectric element (4) is increased or the pulse width is increased. In order to increase the number of ink particles, the pulse density applied to the piezoelectric element (4) is increased.
上記のような従来のインクジエツトを用いた記録方法と
そのインクジエツトヘツドでは、インクを噴射するため
のノズル(5)を１本しか備えておらず、しかも使用する
インクは低濃度で単一濃度のものであるため、次のよう
な問題点があつた。The above-described conventional ink jet recording method and the ink jet head have only one nozzle (5) for ejecting ink, and the ink used is of low density and of single density. However, there are the following problems.
(1) 高濃度の記録をするために噴射するインク量を増
やすと、付着するインク量が記録紙の浸透力以上とな
り、記録の周囲がにじみ、画質が劣化する。(1) When the amount of ejected ink for high density recording is increased, the amount of adhered ink exceeds the penetrating force of the recording paper, the periphery of the recording is blurred, and the image quality is deteriorated.
(2) そして、単一のノズルから多量のインクを噴射さ
せることになるため、記録時間が長くなる。(2) Since a large amount of ink is ejected from a single nozzle, the recording time becomes long.
この発明は、かかる問題点を解決するためになされたも
ので、高濃度の記録をする場合でも、付着するインク量
が記録紙の浸透力以上にならず、記録時間も長くならな
い記録が実施できるインクジェット記録装置を得ること
を目的とする。The present invention has been made in order to solve such a problem, and even when high-density recording is performed, the amount of ink that adheres does not exceed the penetrating power of recording paper, and recording that does not lengthen recording time can be performed. An object is to obtain an inkjet recording device.
この発明に係るインクジェット記録装置は、濃度比が
１：２：…２n-1の関係にあるｎ種類で濃度の異なるイ
ンク粒子を供給するインク供給手段と、供給されたイン
クを各々噴射する複数のノズルと、該ノズルから前記イ
ンクを各々噴射させる駆動手段と、該駆動手段を制御す
る制御手段とを備えてなるものである。The ink jet recording apparatus according to the present invention has an ink supply means for supplying ink particles of n kinds having different densities and having a density ratio of 1: 2: ... 2 n-1 , and a plurality of ink jetting means for respectively ejecting the supplied ink. Nozzle, driving means for respectively ejecting the ink from the nozzle, and control means for controlling the driving means.
この発明においては、異なる濃度のインク粒子が噴射
し、これらのインク粒子が記録面の所定位置に重ね合わ
せて付着する。従つて、記録面の所定位置に付着させら
れるインクの量が減少する。In the present invention, ink particles having different densities are ejected, and these ink particles are attached in a superposed manner at predetermined positions on the recording surface. Therefore, the amount of ink attached to a predetermined position on the recording surface is reduced.
以下、図面によりこの発明の実施例を説明する。第１図
はこの発明の一実施例を示すインクジエツトヘツドの説
明図、第２図は第１図のインクジエツトヘツドのインク
噴射単位を示す説明図であり、(1)はインク供給系、(2)
は可撓壁、(3)は圧力室、(4)は圧力素子、(5)はノズ
ル、(6)はヘツド、(7)は圧電素子、(5)はノズル、(6)は
ヘツド、(7)は圧電素子駆動信号、(8)はインク噴射単位
である。インク供給系(1)には、それぞれ濃度比が１：
２：２2：…：２n-1と２進の関係にあるｎ種類のインク
を用いている。インク噴出原理は従来技術と同じなの
で、ここでは省略する。Embodiments of the present invention will be described below with reference to the drawings. 1 is an explanatory view of an ink jet head showing an embodiment of the present invention, FIG. 2 is an explanatory view showing an ink jet unit of the ink jet head of FIG. 1, (1) is an ink supply system, 2)
Is a flexible wall, (3) is a pressure chamber, (4) is a pressure element, (5) is a nozzle, (6) is a head, (7) is a piezoelectric element, (5) is a nozzle, (6) is a head, (7) is a piezoelectric element drive signal, and (8) is an ink ejection unit. The ink supply system (1) has a density ratio of 1:
2: 2 2 : ...: 2 n−1 and n kinds of inks having a binary relationship are used. Since the principle of ink ejection is the same as that of the conventional technique, it is omitted here.
次に階調表現法について説明する。今、濃度比が１：
２：４の関係にある３種類のインクを用いて記録する場
合を考える。実施例で使用する３種類のインクはそれぞ
れ同一量（１単位と表わすことにする）で１：２：４の
濃度比になるよう調合されていると仮定する。第３図に
階調記録原理を示す。記録濃度が１の時には濃度１のイ
ンクを１単位記録する。記録濃度が２の時には濃度２の
インクを１単位記録する。記録濃度が３の時には濃度１
と濃度２のインクをそれぞれ１単位、合計で２単位記録
する。以下、図に示すように３種類のインクを選択的に
記録して行くことにより、濃度７まで記録することがで
きる。Next, the gradation expression method will be described. Now the concentration ratio is 1:
Consider a case where recording is performed using three types of ink having a relationship of 2: 4. It is assumed that the three kinds of inks used in the examples are prepared in the same amount (to be expressed as one unit) so as to have a density ratio of 1: 2: 4. FIG. 3 shows the principle of gradation recording. When the recording density is 1, one unit of ink having a density of 1 is recorded. When the recording density is 2, one unit of ink having a density of 2 is printed. When recording density is 3, density is 1
1 unit each of ink having a density of 2 and a total of 2 units are recorded. Hereinafter, as shown in the figure, a density of up to 7 can be recorded by selectively recording three types of ink.
ここで０から７までの濃度を記録する場合に、３種類の
インクは多くともそれぞれ１単位しか記録していないこ
とに注意したい。すなわち、１本のノズル(5)は１画素
につき、最小インク量の１単位しか噴射する必要はな
い。一方第３図中に併記したように、濃度１のインクを
噴射するノズル(5)１本だけで全ての濃度を記録する従
来法では、高濃度になればなる程多量のインクを連続的
に噴射することが必要になる。この場合、ノズル(5)の
負担が大きくなるとともに、記録時間が長くなる。これ
に比して、実施例の場合では各ノズル(5)はせいぜい１
単位しか記録しないで済むので負担が軽くなるととも
に、高速記録にも適している。When recording densities from 0 to 7, it should be noted that each of the three types of ink records only one unit at most. That is, one nozzle (5) needs to eject only one unit of the minimum ink amount per pixel. On the other hand, as also shown in FIG. 3, in the conventional method in which all the densities are recorded by only one nozzle (5) that ejects the ink of the density 1, the higher the density, the more ink is continuously supplied. It is necessary to jet. In this case, the load on the nozzle (5) increases and the recording time increases. On the contrary, in the case of the embodiment, each nozzle (5) has at most 1
It is suitable for high-speed recording as well as lightening the burden because it only needs to record units.
次にインク噴出量の合計について実施例と従来法とを比
較する。実施例では０から７までの濃度を記録する場合
には最大で３単位しかインクを記録していない。一方、
従来例では濃度７の記録時に７単位ものインクを要す
る。この場合、記録紙の同一箇所に多量のインクが付着
して記録紙の浸透力を越えてしまい、余分のインクが周
囲ににじみ出て画質が劣化してしまう。実施例では高濃
度の記録時でも小量のインクしか使用しないので、画質
の劣化を防ぐことができる。Next, the example and the conventional method are compared with respect to the total amount of ejected ink. In the embodiment, when recording densities from 0 to 7, ink is recorded at a maximum of 3 units. on the other hand,
In the conventional example, 7 units of ink are required for recording at a density of 7. In this case, a large amount of ink adheres to the same portion of the recording paper and exceeds the penetrating force of the recording paper, and the excess ink oozes out to the surroundings, deteriorating the image quality. In the embodiment, since only a small amount of ink is used even at the time of high density recording, deterioration of image quality can be prevented.
以上の実施例はモノクロ記録の場合であるが、この発明
はカラー多階調記録あるいはフルカラー記録に使用する
ことができる。第４図はカラー記録のできる一実施例で
ある。この場合、インクはイエロー、マゼンタ、シアン
の３原色を用いて、それぞれの色について濃度比が１：
２：４の関係にあるものを使用する。また、カラー記録
では黒インクを使用する場合がある。一般に、各色の濃
度比が１：２：…２n-1のｎ種類のインクを使用する場
合では、インク噴射単位(8)を３ｎ組（３原色の時）ま
たは４ｎ組（３原色＋黒の時）並置した構成にすればよ
い。Although the above embodiment is for monochrome recording, the present invention can be used for color multi-gradation recording or full color recording. FIG. 4 shows an embodiment capable of color recording. In this case, three primary colors of yellow, magenta, and cyan are used as ink, and the density ratio of each color is 1:
Use the one that has a relationship of 2: 4. Also, black ink may be used in color recording. Generally, when n kinds of ink having a density ratio of each color of 1: 2: ... 2 n-1 are used, the ink ejection unit (8) is set to 3 n groups (when three primary colors) or 4 n groups (3 primary colors + black). In this case, it may be arranged side by side.
この発明は以上説明したとおり、異なる濃度のインク粒
子を噴射させ、これらのインク粒子を記録面の所定位置
に重ね合わせて付着させることにより、記録面の所定位
置に付着させられるインクの量が減少し、記録画質を良
好ならしめ、高速記録を可能ならしめるという効果があ
る。As described above, according to the present invention, by ejecting ink particles having different densities and adhering these ink particles to predetermined positions on the recording surface in an overlapping manner, the amount of ink adhered to the predetermined positions on the recording surface is reduced. However, there is an effect that the recording image quality is good and high-speed recording is possible.
第１図はこの発明の一実施例を示すインクジエツトヘツ
ドの説明図、第２図は第１図のインクジエツトヘツドの
インク噴射単位を示す説明図、第３図はこの発明のイン
クジエツトヘツドを使用したときの記録原理説明図、第
４図は多階調カラー記録用インクジエツトヘツドを示す
説明図、第５図は従来のインクジエツトヘツドを示す説
明図である。 図において(1)はインク供給系、(2)は可撓壁、(3)は圧
力室、(4)は圧電素子、(5)ノズル、(6)はヘツド、(7)は
圧電素子駆動信号線、(8)はインク噴射単位である。 なお、各図中同一符号は同一または相当部分を示す。FIG. 1 is an explanatory diagram of an ink jet head showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing an ink jet unit of the ink jet head of FIG. 1, and FIG. 3 is an ink jet head of the present invention. FIG. 4 is an explanatory view showing a recording principle when used, FIG. 4 is an explanatory view showing an ink jet head for multi-tone color recording, and FIG. 5 is an explanatory view showing a conventional ink jet head. In the figure, (1) is an ink supply system, (2) is a flexible wall, (3) is a pressure chamber, (4) is a piezoelectric element, (5) nozzle, (6) is a head, (7) is a piezoelectric element drive. The signal line, (8), is an ink ejection unit. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (3)
種類で濃度の異なるインク粒子を供給するインク供給手
段と、供給されたインクを各々噴射する複数のノズル
と、該ノズルから前記インクを各々噴射させる駆動手段
と、該駆動手段を制御する制御手段とを備えたことを特
徴とするインクジェット記録装置。1. A concentration ratio of 1: 2: ... 2 n-1.
Ink supply means for supplying ink particles of different types and different densities, a plurality of nozzles for respectively ejecting the supplied ink, drive means for ejecting the ink from the nozzles respectively, and control means for controlling the drive means An inkjet recording apparatus comprising:
なる濃度のインク粒子を供給することを特徴とする特許
請求の範囲第１項に記載のインクジェット記録装置。2. The ink jet recording apparatus according to claim 1, wherein the ink supplying means supplies ink particles having different densities for a plurality of types of colors.
する圧電素子であることを特徴とする特許請求の範囲第
１項に記載のインクジェット記録装置。3. The ink jet recording apparatus according to claim 1, wherein the driving means is a piezoelectric element that compresses the flexible wall of the nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59176811A JPH068047B2 (en) | 1984-08-27 | 1984-08-27 | Inkjet recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59176811A JPH068047B2 (en) | 1984-08-27 | 1984-08-27 | Inkjet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6154943A JPS6154943A (en) | 1986-03-19 |
| JPH068047B2 true JPH068047B2 (en) | 1994-02-02 |
Family
ID=16020251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59176811A Expired - Lifetime JPH068047B2 (en) | 1984-08-27 | 1984-08-27 | Inkjet recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH068047B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6145962A (en) * | 1997-01-31 | 2000-11-14 | Canon Kabushiki Kaisha | Method and apparatus for printing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3133750B2 (en) * | 1989-03-24 | 2001-02-13 | キヤノン株式会社 | Ink jet cartridge and ink jet recording apparatus using the same |
| US6682170B2 (en) | 1997-04-07 | 2004-01-27 | Minolta Co., Ltd. | Image forming apparatus |
| JP2000103045A (en) | 1998-09-30 | 2000-04-11 | Nec Corp | Ink jet printer and printing method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5211712A (en) * | 1975-07-17 | 1977-01-28 | Sony Corp | Inkjet picture drawing device |
| JPS5919162A (en) * | 1982-07-23 | 1984-01-31 | Canon Inc | Pattern-forming method |
| JPS60151061A (en) * | 1984-01-20 | 1985-08-08 | Nec Corp | Ink jet recording system |
-
1984
- 1984-08-27 JP JP59176811A patent/JPH068047B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6145962A (en) * | 1997-01-31 | 2000-11-14 | Canon Kabushiki Kaisha | Method and apparatus for printing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6154943A (en) | 1986-03-19 |
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