JP2844808B2 - Inkjet head driving method - Google Patents

Inkjet head driving method

Info

Publication number
JP2844808B2
JP2844808B2 JP5088390A JP5088390A JP2844808B2 JP 2844808 B2 JP2844808 B2 JP 2844808B2 JP 5088390 A JP5088390 A JP 5088390A JP 5088390 A JP5088390 A JP 5088390A JP 2844808 B2 JP2844808 B2 JP 2844808B2
Authority
JP
Japan
Prior art keywords
ink
pressurizing chamber
nozzle
jet nozzle
ink jet
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 - Fee Related
Application number
JP5088390A
Other languages
Japanese (ja)
Other versions
JPH03253345A (en
Inventor
正俊 安原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP5088390A priority Critical patent/JP2844808B2/en
Publication of JPH03253345A publication Critical patent/JPH03253345A/en
Application granted granted Critical
Publication of JP2844808B2 publication Critical patent/JP2844808B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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〕 本発明はドロップオンデマンド型のインクジェットヘ
ッドに関し、特にインクジェットノズルの駆動方法に関
する。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drop-on-demand type inkjet head, and more particularly to a method for driving an inkjet nozzle.

〔従来の技術〕[Conventional technology]

従来、この種のインクジェットノズルは1つのノズル
に対し1つだけインク加圧室を持ち、そのインク加圧室
を加圧することによりインクを噴出させていた。
Conventionally, this type of inkjet nozzle has only one ink pressurizing chamber for one nozzle, and ejects ink by pressurizing the ink pressurizing chamber.

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

上述した従来のインクジェットノズルでは、適正なイ
ンク滴の噴出速度を得るために加圧手段である圧電素子
に加える印加パルスの電圧を高くしたり、そのパルス波
形を複雑な波形としていたので消費電力が大きい又は波
形形成回路が複雑になるという欠点がある。
In the above-described conventional inkjet nozzle, in order to obtain an appropriate ejection speed of the ink droplet, the voltage of the applied pulse applied to the piezoelectric element as the pressurizing means is increased or the pulse waveform is complicated, so that power consumption is reduced. The disadvantage is that the circuit is large or the waveform forming circuit becomes complicated.

〔課題を解決するための手段〕[Means for solving the problem]

本発明のインクジェットヘッド駆動方式は、インク加
圧室の一方からインクを供給し、該インク加圧室の反対
端からインクを噴出する方式のインクジェットノズル
で、1つのインクジェットノズルに対し各々別個に加圧
又は減圧することのできるインク加圧室を2つ持つこと
を特徴とするインクジェットノスルヘッドにおいて、ノ
ズル出口側のインク加圧室を減圧することとインク供給
側のインク加圧室を加圧することを時間差を持たせて行
なうことによりインクを噴出させることを特徴とする。
The ink jet head driving method of the present invention is an ink jet nozzle that supplies ink from one of the ink pressurizing chambers and ejects ink from the opposite end of the ink pressurizing chamber. In an inkjet nozzle head having two ink pressurizing chambers capable of pressure or pressure reduction, the ink pressurizing chamber at the nozzle outlet side is depressurized and the ink pressurizing chamber at the ink supply side is pressurized. This is characterized by ejecting ink by performing this with a time difference.

〔実施例〕〔Example〕

次に本発明について図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.

第1図は本発明の一実施例のインクジェットズル形状
の概観図であり、第2図は圧電素子(1),(2)に加
える印加電圧波形を示す図である。圧電素子(2)4に
印加電圧bを与え、それと時間的にずれた印加電圧aを
圧電素子(1)3に与える。つまり、圧電素子(2)4
に与えられた印加電圧bによってノズル内が減圧された
メニスカスがいったん引き込まれ(第3図d)メニスカ
スが元に戻る時に圧電素子(1)3に与えられた印加電
圧aによって発生した圧力波がメニスカスが到達して加
速され(e)インク滴が噴出する(f)。
FIG. 1 is a schematic view of the shape of an ink jet nozzle according to one embodiment of the present invention, and FIG. An applied voltage "b" is applied to the piezoelectric element (2) 4, and an applied voltage "a" shifted in time from the applied voltage "b" is applied to the piezoelectric element (1) 3. That is, the piezoelectric element (2) 4
The meniscus whose pressure is reduced in the nozzle by the applied voltage b applied to the piezoelectric element (1) 3 is once drawn in (FIG. 3d). The meniscus arrives and is accelerated (e), and an ink droplet is ejected (f).

〔発明の効果〕〔The invention's effect〕

以上説明したように本発明は、ノズル噴出口側のイン
ク加圧室に減圧を、インク供給口側のインク加圧室に加
圧を与える印加電圧を与えることにより、低電圧の駆動
でもインク滴が噴射でき、インク滴の噴出速度も早くな
り、インク滴径も小さくなるという効果がある。
As described above, according to the present invention, by applying an applied voltage for applying pressure to the ink pressurizing chamber on the side of the nozzle ejection port and applying pressure to the ink pressurizing chamber on the side of the ink supply port, the ink droplets can be driven even at a low voltage. Can be ejected, the ejection speed of the ink droplets is increased, and the diameter of the ink droplets is reduced.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明のインクジェットノズル概観図、第2図
は圧電素子(1),(2)に加える印加電圧波形を示す
図である。第3図はノズル先端でのメニスカスの振動を
示す図である。 1……インク噴出口、2……インク供給口、3……圧電
素子(1)、4……圧電素子(2)、a……圧電素子
(1)に加える印加電圧波形、b……圧電素子(2)に
加える印加電圧波形、c……通常状態、d……メニスカ
スが引き込まれた状態、e……メニスカスが加速され噴
出しだした状態、f……インク滴となった状態。
FIG. 1 is a schematic view of an ink jet nozzle of the present invention, and FIG. 2 is a view showing a waveform of a voltage applied to piezoelectric elements (1) and (2). FIG. 3 is a diagram showing the vibration of the meniscus at the tip of the nozzle. 1 ... ink ejection port, 2 ... ink supply port, 3 ... piezoelectric element (1), 4 ... piezoelectric element (2), a ... applied voltage waveform applied to piezoelectric element (1), b ... piezoelectric Applied voltage waveform applied to element (2), c: normal state, d: meniscus retracted state, e: meniscus accelerated and ejected, f: ink droplet state.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】インク加圧室の一方からインクを供給し、
該インク加圧室の反対端からインクを噴出する方式のイ
ンクジェットノズルで、1つのインクジェットノズルに
対し、各々別個に加圧又は減圧することのできるインク
加圧室を2つ持つことを特徴とするインクジェットノズ
ル。上記インクジェットノズルにおいてノズル出口側の
インク加圧室を減圧することとインク供給側のインク加
圧室を加圧することを時間差を持たせて行なうことによ
りインクを噴出させることを特徴とするインクジェット
ヘッド駆動方法。
An ink is supplied from one side of an ink pressurizing chamber,
An ink jet nozzle that ejects ink from the opposite end of the ink pressurizing chamber, characterized in that it has two ink pressurizing chambers that can independently pressurize or depressurize one ink jet nozzle. Ink jet nozzle. An ink jet head drive, characterized in that, in the ink jet nozzle, ink is ejected by reducing the pressure of the ink pressurizing chamber on the nozzle outlet side and pressurizing the ink pressurizing chamber on the ink supply side with a time difference. Method.
JP5088390A 1990-03-02 1990-03-02 Inkjet head driving method Expired - Fee Related JP2844808B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5088390A JP2844808B2 (en) 1990-03-02 1990-03-02 Inkjet head driving method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5088390A JP2844808B2 (en) 1990-03-02 1990-03-02 Inkjet head driving method

Publications (2)

Publication Number Publication Date
JPH03253345A JPH03253345A (en) 1991-11-12
JP2844808B2 true JP2844808B2 (en) 1999-01-13

Family

ID=12871132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5088390A Expired - Fee Related JP2844808B2 (en) 1990-03-02 1990-03-02 Inkjet head driving method

Country Status (1)

Country Link
JP (1) JP2844808B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3168286B2 (en) 1996-03-04 2001-05-21 シャープ株式会社 Inkjet print head
JP3570895B2 (en) 1998-07-02 2004-09-29 日本碍子株式会社 Discharge device for raw materials and fuel
JP2001191526A (en) * 1999-05-28 2001-07-17 Seiko Epson Corp Method for driving ink jet recording head and ink jet recorder
JP5640544B2 (en) * 2010-08-12 2014-12-17 セイコーエプソン株式会社 Liquid ejecting apparatus and wiping method in liquid ejecting apparatus
JP7021536B2 (en) * 2017-03-28 2022-02-17 セイコーエプソン株式会社 Liquid discharge device and its control method

Also Published As

Publication number Publication date
JPH03253345A (en) 1991-11-12

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