EP1233866B1 - Verfahren zur steuerung der heizelemente eines thermodruckkopfes - Google Patents
Verfahren zur steuerung der heizelemente eines thermodruckkopfes Download PDFInfo
- Publication number
- EP1233866B1 EP1233866B1 EP01911748A EP01911748A EP1233866B1 EP 1233866 B1 EP1233866 B1 EP 1233866B1 EP 01911748 A EP01911748 A EP 01911748A EP 01911748 A EP01911748 A EP 01911748A EP 1233866 B1 EP1233866 B1 EP 1233866B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- heating elements
- pulse
- recording
- pulse train
- 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
Images
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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
- B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
- B41J2/355—Control circuits for heating-element selection
-
- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
-
- 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
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/38—Preheating, i.e. heating to a temperature insufficient to cause printing
-
- 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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/30—Embodiments of or processes related to thermal heads
Definitions
- the invention relates to a method of control the heating elements of a thermal print head for recording and Erase points with a reversibly recordable thermal recording material.
- a reversibly recordable thermal recording material is characterized by its transparency and / or Color reversible depending on the temperature of one transparent and / or colorless condition in an opaque and / or colored state and vice versa.
- the reversibly writable thermal recording material becomes the thermal printhead gradually fed, the one about the entire printing width extending, transverse to the transport direction of the thermal recording material Having resistance heating elements, which can be controlled individually are.
- One step of the heating elements can be used per step corresponding line of points are recorded when the heating elements are heated to a temperature that is too high the colored / opaque state of the thermal recording material leads.
- the deletion of the colored / opaque points can be done by a second thermal print head done, the heating elements on a Be heated at the temperature at which the reversibly writable Thermal recording material again in colorless / transparent State passes. Also, a single Thermal print head are used, with which is deleted if the recording material in one direction at him is moved along, during the subsequent movement of the recording material in the reverse direction Record, so the punctiform Describing done (DE 41 30 539 A1).
- the object of the invention is the recording and erasing speed in thermal printing of a reversibly writable Significantly increase recording material.
- the heating elements for writing with a single energy pulse which leads to a temperature leads, in which the reversibly recordable thermal recording material a first, high temperature, which leads to colored / opaque state leads.
- the heating elements with which you want to delete are, when the maximum temperature reaches after the recording pulse then charged with an energy pulse train. In this way, the editing, so the recording and deleting the individual points of a print line, Decreased to 3 ms or less, and a corresponding high recording and erasing speed achieved become.
- the first high temperature, resulting in a coloration or opaque, so milky cloudy becoming the thermal recording material may be, for example 150 ° C or more, the second constant lower temperature, which leads to a Deletion leads, preferably at least 20 ° C below.
- the heating elements can be extinguished applied in two variants with the energy pulse train become.
- all heating elements are initially with triggered the recording energy pulse and following supplied an energy pulse train to the recording energy pulse, the cooling of those heating elements, which is a deletion to slow down so much that the recording material assumes its colorless / transparent state.
- all Heating elements are initially with triggered the recording energy pulse and following supplied an energy pulse train to the recording energy pulse, the cooling of those heating elements, which is a deletion to slow down so much that the recording material assumes its colorless / transparent state.
- all Heating elements first on the discoloring of the recording material required temperature heated, and the heating elements, to delete points by point, then with the pulse train charged to cool more slowly than the other heating elements. It is understood that not necessarily all heating elements the thermal print head are driven in this manner but only those that have the desired print width correspond. It is also clear that the colorless / transparent Condition may also have a different color as the color when coloring the thermal recording material occurs.
- the heating elements for recording charged with the recording energy pulse and the heating elements for extinction immediately after the Recording energy pulse with an energy pulse train, through the the heating elements to a second constant temperature are heated, where the thermal recording material assumes a transparent / colorless state, wherein the second temperature below the colored / opaque state Temperature is.
- the second variant In the second variant, however, must delete the second Temperature generally a certain time of at least 1 ms long. It is therefore generally something slower than the first variant. That is, while the pulse duration for the pulse for recording is about 1 to 2 ms the duration of the fed during cooling pulse train of the first Variant about 1 to 2 ms, while the duration of the pulse train to Delete in the second variant is about 2 to 3 ms to the temperature at least about 1 ms at the second temperature to keep the thermal recording material the transparent / colorless state takes.
- the reversibly writable thermal recording material the can be used according to the invention, any known reversibly recordable thermal recording material be (compare DE 41 30 539 A1, DE 42 10 379 C2 and 42 00th 474 C2).
- a commercially available Recording material used consisting of a mixture of a leuco dye and a developer.
- the leuco dye may be a xanthene derivative.
- the xanthene in the 3-position on a dialkylamine radical and at its 9-position is a phenyl radical having a carboxylic acid group is bound in o-position, so that as in Fluorescein in leukoform a lactone ring with the 9-position forms, in the colored state by regression the carboxyl group is opened.
- the pulse train Pulse same period of preferably less than 100 ⁇ s, in particular less than 50 ⁇ s on.
- the pulse / pause ratio per period is preferably at most 1: 1, in particular about 1: 2. That is, at a Period of e.g. For example, 30 ⁇ s is the pulse duration 10 ⁇ s and the pause 20 ⁇ s.
- the heating elements of the thermal print head before editing, so recording and deleting, on one Preheated temperature preferably at least 30 ° C below the second, so the extinguishing temperature is. If the Erase temperature, for example, at 120 ° C, the preheating temperature for example, at about 60 ° C.
- Such preheating in thermal printing is for example from DE 30 33 746 A1.
- Preheating will cause the temperature difference reduced to record or delete, i.e. reduced the heat output required for printing, which due to the faster heating of the resistance heating elements a higher printing speed is achieved.
- the extinguishing quality is significantly improved.
- the clock frequency during preheating not more than four times the pulse duration for recording and the pulse width during preheating be constant is the period of the individual pulses of the pulse train for preheating less than 100 ⁇ s, in particular less than 50 ⁇ s, i. at a pulse duration for the Pulse for recording 1 to 2 ms, less than a tenth, preferably less than one twentieth of the pulse duration.
- the pulse / pause ratio per period preferably with increasing temperature of the thermal print head reduced. So can at constant period the individual pulses the pulse duration at the beginning of preheating For example, 10% or less of the period and at the end the preheating or for holding the preheat temperature For example, be 3% or less. That is, at one period for example, 30 ⁇ s per single pulse, the Pulse duration at the beginning of preheating, for example, 2 microseconds and at the end of preheating and to maintain the preheat temperature for example, 0.5 ⁇ s.
- the pulse duration during preheating for example, by the Temperature of the thermal print head to be controlled, which with a temperature sensor, such as a temperature-dependent Resistance measured with a negative temperature coefficient can be.
- the preheating temperature can be set the heating elements to, for example ⁇ 2 ° C or more precisely to adjust. This makes the thermal print head minimally thermal claimed and its life significantly increased. Like yourself as a result of experiments, the life span even becomes so longer than without preheating, because the thermal print head during recording subject to lower temperature jumps.
- the Period duration of the individual pulses of the pulse train during preheating preferably corresponds to the period of the individual pulses the pulse train to delete, so in both cases for example, be 30 microseconds.
- FIG. 1 is the reversible thermal recording material at TO in a transparent and / or colorless state, So before with low color density.
- TO can be at room temperature be or below or a preheat temperature represent.
- T1 e.g. 160 ° C
- the color density according to the dashed line in particular after the melting point TM of the reversible thermal dye has been exceeded.
- T1 e.g. 160 ° C
- a thermal printer 1 has two transport roller pairs 3, 4 a thermal print head 2.
- the authorization cards 5 are supplied according to the arrow 6, with the transport rollers 3, 4 gradually along for processing the thermal print head 2 moves and over the output slot 7th output.
- the print head 2 has at its edge facing the card 5 individually controllable resistance heating elements 8, the on the card 5 a transverse to the transport direction 6 extending Form row.
- the heating elements 8 are between two consecutive Controlled transport steps and thereby heated.
- the counter-pressure roller 9 against the card 5 pressed.
- a shift register 10 receives Data 11 from a data source, not shown on the card 5 information to be displayed.
- a discriminator 12 distinguishes whether for the information recording a colored / opaque Point or a colorless / transparent point the card at the respective transport step by the relevant heating element 8 is to be formed.
- the editing section 13 sets the data to the recording energy pulse and to generate the erase energy pulse train.
- the Pulse data from the decoder 14 to a total pulse train to Driving the heating elements 8 to edit the relevant Line of card 5 is decoded and this total pulse train is the Driver 15 abandoned.
- Figure 4 is for the first variant of the invention Process illustrated with (a) the pulse train with which the heating elements 8 and with (b) the temperature of the Thermal recording material upon receipt of the pulse train.
- the heating elements 8 at the points of the line that deleted be immediately after the pulse W with the Pulse train E1 activated It consists for example of individual pulses with a period of 30 ⁇ s, with the pulse duration e.g. 10 ⁇ s and the pause duration, for example 20 ⁇ s per period can amount.
- L1 represents the period for editing, that is Print and delete the 1st line and L2 for editing the second line.
- the embodiment of Figure 5 differs from the according to Figure 4 essentially in that immediately after the pulse F, the heating elements 8 at the points of the line to which should be deleted, impinged by the pulse train E2 be determined by the temperature of that heating element 8 raised according to the curve C to a temperature T2 which is below the temperature T1 according to the diagram the figure 1 is located.
- the pulse train is shown in FIG. 5 (a) which is supplied to the heating elements for recording, and (c) the pulse train with which the heating elements are driven to extinguish while (b) and (d) the temperature / time diagram upon receipt of the pulse train (a) or (c) represent.
Description
- Figur 1
- ein Diagramm, das die Veränderung der Farbdichte eines reversiblen wärmeempfindlichen Aufzeichnungsmaterials zur Verwendung bei dem erfindungsgemäßen Verfahren in Abhängigkeit von der Temperatur darstellt;
- Figur 2
- schematisch einen Thermodrucker zum reversiblen Drucken von Berechtigungskarten;
- Figur 3
- ein Blockdiagramm zur Ansteuerung des Thermodruckkopfes; und
- Figuren
- 4 und 5 jeweils ein Diagramm zur Erläuterung der ersten bzw. zweiten Variante des erfindungsgemäßen Verfahrens.
Claims (9)
- Verfahren zur Steuerung der Heizelemente eines Thermodruckkopfes zum Aufzeichnen und Löschen von Daten auf einem reversibel beschreibbaren Thermoaufzeichnungsmaterial, dadurch gekennzeichnet, dass den Heizelementen zum Aufzeichnen ein Energiepuls (W, F) zugeführt wird, durch den das Aufzeichnungsmaterial auf eine Temperatur (T1) erwärmt wird, bei der es einen farbigen bzw. opaken Zustand einnimmt, und die Heizelemente zum Löschen im Anschluß an den Aufzeichnungspuls mit einem Energiepulszug (E1, E2) beaufschlagt werden.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass den Heizelementen zum Löschen erst ein Energiepuls (W) zugeführt wird, durch den das Aufzeichnungsmaterial auf eine Temperatur (T1) erwärmt wird, bei der es einen farbigen bzw. opaken zustand einnimmt und im Anschluß an den Aufzeichnungspuls (W) ein Pulszug (E1) zugeführt wird, der die Abkühlung der Heizelemente derart verzögert, dass das Aufzeichnungsmaterial einen farblosen bzw. transparenten Zustand einnimmt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass den Heizelementen zum Löschen im Anschluß an den Aufzeichnungspuls (F) ein Pulszug (E2) zugeführt wird, durch den sie auf eine zweite Temperatur (T2) erwärmt werden, bei der das Thermoaufzeichnungsmaterial einen farblosen bzw. transparenten Zustand einnimmt, wobei die zweite Temperatur (T2) unter der ersten Temperatur (T1) liegt, bei der das Thermoaufzeichnungsmaterial den farbigen bzw. opaken Zustand einnimmt.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass sich durch den Pulszug die zweite Temperatur (T2) wenigstens 1 ms lang einstellt.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Heizelemente zum Aufzeichnen und Löschen durch einen Energiepulszug auf eine vorgegebene Temperatur (T0) vorerwärmt werden.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Pulszug zum Löschen und/oder zum Vorerwärmen aus Pulsen gleicher Periodendauer besteht.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Periodendauer der Einzelpulse des Pulszuges höchstens 100 µs beträgt.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das Puls/Pausen-Verhältnis des Pulszuges zum Löschen je Periode höchstens 1:1 beträgt.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass das Puls/Pausen-Verhältnis des Pulszuges zum Vorerwärmen pro Periode mit zunehmender Temperatur des Thermodruckkopfes herabgesetzt wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10012360 | 2000-03-14 | ||
DE10012360A DE10012360C2 (de) | 2000-03-14 | 2000-03-14 | Verfahren zur Steuerung der Heizelemente eines Thermodruckkopfes |
PCT/EP2001/002568 WO2001068370A1 (de) | 2000-03-14 | 2001-03-07 | Verfahren zur steuerung der heizelemente eines thermodruckkopfes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1233866A1 EP1233866A1 (de) | 2002-08-28 |
EP1233866B1 true EP1233866B1 (de) | 2003-10-29 |
Family
ID=7634657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01911748A Expired - Lifetime EP1233866B1 (de) | 2000-03-14 | 2001-03-07 | Verfahren zur steuerung der heizelemente eines thermodruckkopfes |
Country Status (9)
Country | Link |
---|---|
US (1) | US6731318B2 (de) |
EP (1) | EP1233866B1 (de) |
JP (1) | JP4342759B2 (de) |
KR (1) | KR20020008169A (de) |
AT (1) | ATE252983T1 (de) |
CA (1) | CA2366292A1 (de) |
DE (2) | DE10012360C2 (de) |
NO (1) | NO20015201L (de) |
WO (1) | WO2001068370A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008537913A (ja) * | 2005-04-06 | 2008-10-02 | ズィンク イメージング エルエルシー | 多色赤外画像化法、およびそれに用いるための赤外画像化部材 |
US20080158708A1 (en) * | 2006-12-29 | 2008-07-03 | Maulion Frederick A | Preparing for servo write |
GB2582179B (en) * | 2019-03-15 | 2022-04-20 | Magicard Ltd | Method and apparatus for printing |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2729375B2 (ja) * | 1987-03-02 | 1998-03-18 | キヤノン株式会社 | 記録ヘッドの駆動方法 |
DE3833746A1 (de) * | 1988-09-30 | 1990-04-05 | Siemens Ag | Thermodruckverfahren mit vorheizung |
DE69128375T2 (de) * | 1990-06-14 | 1998-07-23 | Mitsubishi Electric Corp | Wiedereinschreibbares Aufzeichnungsgerät/Anzeigevorrichtung und Verfahren zum Löschen der Aufzeichnung |
JP2700234B2 (ja) * | 1990-09-14 | 1998-01-19 | 株式会社リコー | 可逆性感熱記録材料 |
DE4130539A1 (de) * | 1990-09-14 | 1992-03-19 | Ricoh Kk | Reversibles waermeempfindliches aufzeichungsmaterial und bildanzeigeverfahren unter verwendung desselben |
JP3032263B2 (ja) * | 1990-10-04 | 2000-04-10 | 株式会社東芝 | 記録装置 |
JP3100450B2 (ja) | 1991-01-11 | 2000-10-16 | 株式会社リコー | 画像記録方法及びこれに用いる装置 |
JP3017828B2 (ja) * | 1991-03-29 | 2000-03-13 | 株式会社東芝 | 記録装置 |
JPH05262013A (ja) | 1992-03-24 | 1993-10-12 | Toshiba Corp | 記録装置 |
US5424764A (en) * | 1992-08-24 | 1995-06-13 | Kabushiki Kaisha Toshiba | Thermal recording apparatus for recording and erasing an image on and from a recording medium |
US5572528A (en) * | 1995-03-20 | 1996-11-05 | Novell, Inc. | Mobile networking method and apparatus |
US5982807A (en) * | 1997-03-17 | 1999-11-09 | Harris Corporation | High data rate spread spectrum transceiver and associated methods |
US5987033A (en) * | 1997-09-08 | 1999-11-16 | Lucent Technologies, Inc. | Wireless lan with enhanced capture provision |
US6254225B1 (en) * | 1997-10-17 | 2001-07-03 | Eastman Kodak Company | Continuous ink jet printer with asymmetric heating drop deflection |
-
2000
- 2000-03-14 DE DE10012360A patent/DE10012360C2/de not_active Expired - Fee Related
-
2001
- 2001-03-07 EP EP01911748A patent/EP1233866B1/de not_active Expired - Lifetime
- 2001-03-07 WO PCT/EP2001/002568 patent/WO2001068370A1/de active IP Right Grant
- 2001-03-07 DE DE50100868T patent/DE50100868D1/de not_active Expired - Lifetime
- 2001-03-07 US US10/030,006 patent/US6731318B2/en not_active Expired - Lifetime
- 2001-03-07 JP JP2001566903A patent/JP4342759B2/ja not_active Expired - Fee Related
- 2001-03-07 KR KR1020017013944A patent/KR20020008169A/ko not_active Application Discontinuation
- 2001-03-07 AT AT01911748T patent/ATE252983T1/de active
- 2001-03-07 CA CA002366292A patent/CA2366292A1/en not_active Abandoned
- 2001-10-24 NO NO20015201A patent/NO20015201L/no unknown
Also Published As
Publication number | Publication date |
---|---|
CA2366292A1 (en) | 2001-09-20 |
JP4342759B2 (ja) | 2009-10-14 |
NO20015201D0 (no) | 2001-10-24 |
DE50100868D1 (de) | 2003-12-04 |
KR20020008169A (ko) | 2002-01-29 |
JP2003526549A (ja) | 2003-09-09 |
WO2001068370A1 (de) | 2001-09-20 |
NO20015201L (no) | 2001-10-24 |
US20030007059A1 (en) | 2003-01-09 |
DE10012360C2 (de) | 2002-01-31 |
EP1233866A1 (de) | 2002-08-28 |
ATE252983T1 (de) | 2003-11-15 |
DE10012360A1 (de) | 2001-09-27 |
US6731318B2 (en) | 2004-05-04 |
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