WO2021042633A1 - 设置内循环系统的喷墨打印墨盒 - Google Patents

设置内循环系统的喷墨打印墨盒 Download PDF

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Publication number
WO2021042633A1
WO2021042633A1 PCT/CN2019/127731 CN2019127731W WO2021042633A1 WO 2021042633 A1 WO2021042633 A1 WO 2021042633A1 CN 2019127731 W CN2019127731 W CN 2019127731W WO 2021042633 A1 WO2021042633 A1 WO 2021042633A1
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Prior art keywords
inkjet
internal circulation
circulation system
print cartridge
pressure source
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French (fr)
Inventor
黄志达
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/17Ink jet characterised by ink handling
    • B41J2/175Ink supply systems ; Circuit parts therefor
    • B41J2/17503Ink cartridges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/17Ink jet characterised by ink handling
    • B41J2/18Ink recirculation systems

Definitions

  • the present invention relates to the technical field of printing equipment, and more specifically, to an inkjet printing cartridge provided with an internal circulation system.
  • OLEDs organic electroluminescent devices
  • ink-jet printing ink-jet printing
  • the main purpose of performing the pre-printing process is to adjust the physical characteristics of the ink to satisfy stable printing.
  • the present invention adjusts the viscosity characteristics of the ink in the ink cartridge by increasing the internal circulation system of the ink cartridge, and circulates the preparation work before printing inside the printing system, thereby further improving the preparation of organic electroluminescence for inkjet printing.
  • An inkjet print cartridge provided with an internal circulation system includes: an inkjet storage container for storing organic luminescent material ink; a printing nozzle; and an inkjet internal circulation unit connected to the inkjet The storage container and the printing nozzle adjust the viscosity of the organic luminescent material ink in the inkjet storage container through the inkjet internal circulation unit, and then perform printing by the printing nozzle.
  • the above-mentioned inkjet storage container is an organic luminescent material storage container.
  • the above-mentioned ink jet internal circulation unit realizes the internal circulation of the organic luminescent material ink through a transfer pump.
  • the above-mentioned transfer pump is a liquid transfer pump, and the liquid transfer pump controls the speed of the impeller to adjust the viscosity of the ink jet.
  • the inkjet internal circulation unit described above realizes the internal circulation of the organic luminescent material ink through a pressure difference.
  • the ink jet internal circulation unit is further provided with a temperature control unit to control the temperature change caused by the rotation of the impeller.
  • the ink jet internal circulation unit is further provided with a first pressure source and a second pressure source.
  • the pressure value of the second pressure source is greater than that of the first pressure source.
  • the inkjet internal circulation unit described above realizes the internal circulation of the organic light-emitting material ink through the pressure difference between the first pressure source and the second pressure source.
  • the technical points of the inkjet print cartridge with the internal circulation system are:
  • Fig. 1 shows a system architecture of an inkjet print cartridge provided with an internal circulation system according to an embodiment of the present invention.
  • Fig. 2 shows a schematic diagram of a first embodiment according to the present invention.
  • Fig. 3 shows a schematic diagram of a second embodiment according to the present invention.
  • the inkjet print cartridge 1 with an internal circulation system includes: an inkjet storage container 101, It is used to store organic luminescent material ink; a printing nozzle 102; and an inkjet internal circulation unit 110 which connects the inkjet storage container 101 and the printing nozzle 102, and adjusts the inkjet by the inkjet internal circulation unit 110
  • the viscosity of the organic light-emitting material ink in the storage container 101 is then printed by the printing nozzle 102.
  • the inkjet storage container is an organic luminescent material storage container.
  • the inkjet internal circulation unit realizes the internal circulation of the organic luminescent material ink through a transfer pump.
  • the transfer pump is a liquid transfer pump.
  • the liquid delivery pump controls the speed of the impeller to adjust the viscosity of the inkjet.
  • the inkjet internal circulation unit is further provided with a temperature control unit to control the factor. The temperature change caused by the rotation of the impeller.
  • the ink jet internal circulation unit is provided with a first pressure source and a second pressure source, wherein the pressure value of the second pressure source is greater than the first pressure source, and the ink jet internal The circulation unit realizes the internal circulation of the organic luminescent material ink through the pressure difference between the first pressure source and the second pressure source.
  • FIG. 2 shows a schematic diagram of a first embodiment according to the present invention, in which a liquid transfer pump 210 is added to the lower end of the organic luminescent material storage container 201 through the pipeline in front of the print nozzle 202 to achieve the organic luminescent material Inner loop.
  • the speed of the ink internal circulation in the organic luminescent material storage container 201 is controlled by controlling the speed of the impeller in the liquid transfer pump 210.
  • the faster the speed of the impeller, the lower the inkjet viscosity; the inkjet internal circulation unit is equipped with a temperature control unit to control
  • the temperature change caused by the rotation of the impeller adjusts the viscosity characteristics of the organic light-emitting material, and then prints by the printing nozzle 202.
  • the relationship between the speed of the impeller and the viscosity is not only related to the speed but also to the category of the fluid itself.
  • most of the fluids used in the printing process are non-Newtonian fluids.
  • the viscosity of the fluid will decrease, but at the same time, the friction between the impeller and the fluid will cause a local temperature increase.
  • the overall temperature of the fluid will increase due to heat conduction. This part of the temperature change will cause the overall temperature to rise.
  • the control system can be designed with a serpentine tube, where the outside of the serpentine tube is ink, and the inside of the tube is ink.
  • slight changes in temperature (within 0.2°C) will cause the failure of the pre-built driver waveform, which will result in low production efficiency.
  • the increase in flow velocity will result in the thinning of the fluid boundary layer and the increase in internal energy generated by friction, making the internal energy consumption more serious. Therefore, in the inkjet internal circulation unit, a device that can also achieve temperature control is an extremely important issue.
  • FIG. 3 shows a schematic diagram of a second embodiment according to the present invention, in which a first pressure source 310 is provided at the top of the organic luminescent material storage container 201, and a second pressure source 320 is provided at the front end of the printing nozzle 202 , Wherein the pressure value P2 of the second pressure source 320 is greater than the pressure value P1 of the first pressure source 310, and the inkjet internal circulation unit at the top of the organic luminescent material storage container 201 and the front end of the print nozzle 202 passes through the first The pressure difference between a pressure source and the second pressure source realizes the internal circulation of the organic luminescent material storage container 201.
  • the internal circulation of the organic luminescent material is realized by controlling the pressure difference between the top of the container and the front of the print nozzle. In this way, the viscosity characteristics of the organic light-emitting material are adjusted to achieve printing efficiency.
  • the viscosity characteristics of the organic light-emitting material are adjusted to achieve printing efficiency.
  • the technical points of the inkjet print cartridge with the internal circulation system are:
  • the subject of this application can be manufactured and used in industry and has industrial applicability.

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  • Electroluminescent Light Sources (AREA)
  • Ink Jet (AREA)

Abstract

一种设置内循环系统的喷墨打印墨盒(1),包括:一喷墨储存容器(101),用以储存有机发光材料墨水;一打印喷头(102);以及一喷墨内循环单元(110),连接喷墨储存容器(101)及打印喷头(102),通过喷墨内循环单元(110)调节喷墨储存容器(101)内有机发光材料墨水的粘度,再通过打印喷头(102)进行打印。该装置通过调整墨盒内高分子类墨水的粘度特性来进一步提高打印效率,并减少预打印时材料的损失。

Description

设置内循环系统的喷墨打印墨盒 技术领域
本发明涉及打印设备技术领域,更具体地,涉及一种设置内循环系统的喷墨打印墨盒。
背景技术
目前,有机电致发光器件(OLED)以其自发光、全固态、高对比度等优点,成为近年来最具潜力的新型显示器件,其中通过喷墨打印(ink-jet printing)来制备相应器件的方法由于其较高的材料利用率而备受关注。
在目前打印过程中,墨盒内液体由于动态粘度与静态粘度存在差异而使得在每次打印前期都需要通过预打印来调节墨盒内液体的粘度使其满足打印需求。如果能减少预打印的频率,或直接通过某种方式来避免预打印操作,则有望进一步提高喷墨打印过程中材料的利用率以及打印效率。执行预打印的过程的主要目的在于调整墨水的物理特性使其满足稳定打印。
技术问题
针对现有技术中存在的上述缺点,本发明通过增加墨盒内循环系统以调整墨盒内墨水的粘度特性,将打印前的准备工作在打印系统内部循环完成,进一步提高喷墨打印制备有机电激发光显示器(OLED)全过程有机发光材料的利用率以及喷墨打印效率。
技术解决方案
本发明的目的及解决其技术问题是采用以下技术方案来实现的。依据本发明提出的一种设置内循环系统的喷墨打印墨盒,其包括:一喷墨储存容器,用以储存有机发光材料墨水;一打印喷头;以及一喷墨内循环单元,连接该喷墨储存容器及该打印喷头,通过所述喷墨内循环单元调节所述喷墨储存容器内有机发光材料墨水的粘度,再通过所述打印喷头进行打印。
本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。
在本发明的一实施例中,上述喷墨储存容器是一有机发光材料储存容器。
在本发明的一实施例中,上述喷墨内循环单元通过一传送泵来实现有机发光材料墨水的内循环。
在本发明的一实施例中,上述传送泵是一液体传送泵,所述液体传送泵控制叶轮转速来调节喷墨的粘度。
在本发明的一实施例中,上述喷墨内循环单元通过压力差来实现有机发光材料墨水的内循环。
在本发明的一实施例中,上述叶轮转速越快,则喷墨粘度越低。
在本发明的一实施例中,上述喷墨内循环单元更设置一控温单元以控制因所述叶轮转动而产生的温度变化。
在本发明的一实施例中,上述喷墨内循环单元通过更设置一第一压力源及一第二压力源。
在本发明的一实施例中,上述第二压力源的压力值大于上述第一压力源。
在本发明的一实施例中,上述喷墨内循环单元通过所述第一压力源及所述第二压力源的压力差来实现有机发光材料墨水的内循环。
有益效果
在本发明中,设置内循环系统的喷墨打印墨盒的技术的点在于:
1. 通过调整墨盒内高分子类墨水的粘度特性来进一步提高打印效率;
2. 通过调整墨盒内高分子类墨水的粘度特性来减少预打印时材料的损失。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其它的附图。
图1示出了根据本发明的一个实施例的设置内循环系统的喷墨打印墨盒的系统架构。
图2示出了根据本发明的第一实施例示意图。
图3示出了根据本发明的第二实施例示意图。
本发明的实施方式
以下各实施例的说明是参考附加的图式,用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语,例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本发明,而非用以限制本发明。
附图和说明被认为在本质上是示出性的,而不是限制性的。在图中,结构相似的单元是以相同标号表示。另外,为了理解和便于描述,附图中示出的每个组件的尺寸和厚度是任意示出的,但是本发明不限于此。
另外,在说明书中,除非明确地描述为相反的,否则词语“包括”将被理解为意指包括所述组件,但是不排除任何其它组件。此外,在说明书中,“在......上”意指位于目标组件上方或者下方,而不意指必须位于基于重力方向的顶部上。
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例,对依据本发明提出的客制化智能电子设备的方法及设备其具体实施方式、结构、特征及其功效,详细说明如后。
请参照图1,示出了根据本发明的一个实施例的设置内循环系统的喷墨打印墨盒的系统架构,设置内循环系统的喷墨打印墨盒1,其包括:一喷墨储存容器101,用以储存有机发光材料墨水;一打印喷头102;以及一喷墨内循环单元110连接所述喷墨储存容器101及所述打印喷头102,通过所述喷墨内循环单元110调节所述喷墨储存容器101内有机发光材料墨水的粘度,再通过所述打印喷头102进行打印。
在本实施例中,所述喷墨储存容器是一有机发光材料储存容器。
在本实施例中,所述喷墨内循环单元通过一传送泵来实现有机发光材料墨水的内循环。
在本实施例中,所述传送泵是一液体传送泵。
在本实施例中,所述液体传送泵控制叶轮转速来调节喷墨的粘度,其中叶轮转速越快,则喷墨粘度越低,所述喷墨内循环单元更设置一控温单元以控制因所述叶轮转动而产生的温度变化。
在本实施例中,所述喷墨内循环单元通过设置一第一压力源及一第二压力源,其中所述第二压力源的压力值大于所述第一压力源,所述喷墨内循环单元通过所述第一压力源及所述第二压力源的压力差来实现有机发光材料墨水的内循环。
请参照图2,图2示出了根据本发明的第一实施例示意图,其中,通过在打印喷头202前的管路及有机发光材料储存容器201下端增加一液体传送泵210实现有机发光材料的内循环。通过控制液体传送泵210中叶轮转速来控制有机发光材料储存容器201中墨水内循环的速率,当叶轮转速越快,则喷墨粘度越低;喷墨内循环单元更设置一控温单元以控制因所述叶轮转动而产生的温度变化,由此来调节有机发光材料的粘度特性,再通过打印喷头202进行打印。
具体的,叶轮转速与粘度的关系,不仅与转速有关也与流体本身的类别有关。目前打印过程中所使用的流体多为非牛顿流体。随着叶轮转速的加快会使得流体粘度下降,但同时由于叶轮和流体之间的摩擦,会导致局部温度升高,随着时间的延长,由于热传导现象,而导致流体的整体温度升高。 这部分温度的改变,会导致整体的温度上升。  而打印过程中,对粘度一致性的要求非常高,要求粘度变化范围在0.2cp之内,换言之温度的升降应该在0.3℃以内,因此本专利还提出了需要新设内部控温系统。该控系统可以采用蛇形管设计,蛇形管外为墨水,管内为墨水。针对印刷工艺制备OLED器件而言,温度的细微变化(0.2℃以内)都会导致预先内置的驱动器波形失效从而使得生产效率低下。本发明中提供恒温的内循环系统也是一项重要的特征,因为流体运动以后,与静态相比,其温度的变化更加难以控制。比如流速的提高会导致流体边界层减薄,摩擦产生的内能升高,使得内部耗能更严重。因此,在喷墨内循环单元,还能实现温度控制的装置是极为重要的课题。
请参照图3,图3示出了根据本发明的第二实施例示意图,其中,在有机发光材料储存容器201顶端设置一第一压力源310,在打印喷头202前端设置一第二压力源320,其中,所述第二压力源320的压力值P2大于第一压力源310的压力值P1,通过有机发光材料储存容器201顶端及打印喷头202前端的所述喷墨内循环单元通过所述第一压力源及所述第二压力源的压力差来实现有机发光材料储存容器201的内循环。
具体的,通过控制容器顶端及打印喷头前端的压力差来实现有机发光材料的的内循环。由此来调节有机发光材料的粘度特性,从而实现打印效率。
由此来调节有机发光材料的粘度特性,从而实现打印效率。
在本发明中,设置内循环系统的喷墨打印墨盒的技术的点在于:
1. 通过调整墨盒内高分子类墨水的粘度特性来进一步提高打印效率;
2. 通过调整墨盒内高分子类墨水的粘度特性来减少预打印时材料的损失。
以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。
工业实用性
本申请的主题可以在工业中制造和使用,具备工业实用性。

Claims (12)

  1. 一种喷墨打印墨盒,其包括:
    一喷墨储存容器,用以储存有机发光材料墨水;
    一打印喷头;以及
    一喷墨内循环单元,连接所述喷墨储存容器及所述打印喷头,通过所述喷墨内循环单元调节所述喷墨储存容器内有机发光材料墨水的粘度,再通过所述打印喷头进行打印。
  2. 根据权利要求1所述的设置内循环系统的喷墨打印墨盒,其中,所述喷墨储存容器是一有机发光材料储存容器。
  3. 根据权利要求1所述的设置内循环系统的喷墨打印墨盒,其中,所述喷墨内循环单元通过一传送泵实现有机发光材料墨水的内循环。
  4. 根据权利要求3所述的设置内循环系统的喷墨打印墨盒,其中,所述传送泵是一液体传送泵。
  5. 根据权利要求4所述的设置内循环系统的喷墨打印墨盒,其中,所述液体传送泵控制叶轮转速来调节喷墨的粘度。
  6. 根据权利要求5所述的设置内循环系统的喷墨打印墨盒,其中,所述叶轮转速越快,则喷墨粘度越低。
  7. 根据权利要求5所述的设置内循环系统的喷墨打印墨盒,其中,所述粘度的变化范围在0.2cp之内。
  8. 根据权利要求5所述的设置内循环系统的喷墨打印墨盒,其中,所述喷墨内循环单元更设置一控温单元以控制因所述叶轮转动而产生的温度变化。
  9. 根据权利要求8所述的设置内循环系统的喷墨打印墨盒,其中,因所述叶轮转动而产生的喷墨温度的升降在0.3℃以内。
  10. 根据权利要求1所述的设置内循环系统的喷墨打印墨盒,其中,所述喷墨内循环单元通过更设置一第一压力源及一第二压力源,通过控制容器顶端及打印喷头前端的压力差来实现有机发光材料的的内循环。
  11. 根据权利要求10所述的设置内循环系统的喷墨打印墨盒,其中,所述第二压力源的压力值大于所述第一压力源。
  12. 根据权利要求10所述的设置内循环系统的喷墨打印墨盒,其中,所述喷墨内循环单元通过所述第一压力源及所述第二压力源的压力差来实现有机发光材料墨水的内循环。
     
PCT/CN2019/127731 2019-09-06 2019-12-24 设置内循环系统的喷墨打印墨盒 Ceased WO2021042633A1 (zh)

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