公开(公告)号：WO1994026522A1

公开(公告)日：1994-11-24

申请号：PCT/US1994005064

申请日：1994-05-03

Applicant: COMPAQ COMPUTER CORPORATION

Inventor： COMPAQ COMPUTER CORPORATION ,  WALLACE, David, B. ,  STORTZ, James, L.

IPC: B41J02/045

CPC classification number: B41J2/14209 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2002/14379 ,  B41J2002/14491

Abstract: An ink jet printhead (10) and an associated method for operatively driving the ink jet printhead (10) to cause the ejection of a volume modulatable droplet from an ink-carrying channel (32) thereof partially defined by a piezoelectric sidewall actuator (34). The voltage (53) applied across the sidewall actuator (34) is raised from a rest voltage (54) to a first voltage to deflect the sidewall actuator (34) from a rest position to a first position and maintained at the first voltage for a first period of time. The voltage applied across the sidewall actuator (34) is then dropped to a second voltage, lower than the rest voltage, to deflect the sidewall actuator from the first position, past the rest position, to a second position and maintained at the second voltage for a second period of time. The voltage applied across the sidewall actuator (34) is then returned to the rest voltage (54) to deflect the sidewall actuator (34) back to the rest position. The first and second time periods are selected, relative to each other, to select a droplet volume for ink ejected from the ink-carying channel. The voltage applied across the sidewall actuator is then returned to the rest voltage, thereby causing the ejection of a droplet of ink having the selected droplet volume.

Abstract translation: 一种喷墨打印头（10）和用于可操作地驱动喷墨打印头（10）的相关方法，以使得可由压电侧壁致动器（34）部分地限定的墨水输送通道（32）喷射体积可调节液滴， 。 施加在侧壁致动器（34）上的电压（53）从静止电压（54）升高到第一电压，以将侧壁致动器（34）从静止位置偏转到第一位置并保持在第一电压 第一段时间。 然后，施加在侧壁致动器（34）上的电压降至低于静止电压的第二电压，以将侧壁致动器从第一位置偏转到静止位置到第二位置并保持在第二电压 第二段时间。 施加在侧壁致动器（34）上的电压然后返回到静止电压（54），以使侧壁致动器（34）偏转回到静止位置。 相对于彼此来选择第一和第二时间周期来选择从墨水通道喷射的墨的液滴体积。 然后施加在侧壁致动器上的电压返回到静止电压，从而引起具有所选择的液滴体积的墨滴。

公开(公告)号：WO1994026525A1

公开(公告)日：1994-11-24

申请号：PCT/US1994005061

申请日：1994-05-04

Applicant: COMPAQ COMPUTER CORPORATION

Inventor： COMPAQ COMPUTER CORPORATION ,  STORTZ, James, L.

IPC: B41J02/205

CPC classification number: B41J2/2128 ,  B41J2202/10

Abstract: A spot size modulatable, drop-on-demand type ink jet printhead (2) for producing grey-scale images on a substrate. The ink jet printhead (2) includes a main body portion (14) having an ink-carrying channel (6) extending therethrough and a piezoelectric actuator (34) coupled to the ink-carrying channel (6). A spot size for droplets to form when striking the substrate after ejection from the ink-carrying channel (6) is selected and a look-up table (54) translates the selected spot size into a time period during which a voltage pulse is to be applied to the piezoelectric actuator (34) by an associated switching structure (62) to initiate application of the voltage waveform, determines whether the voltage waveform has been applied to the piezoelectric actuator (34) for the time period and terminates application of the voltage waveform upon expiration of the time period. The control circuit includes a sequencer (60) which selectively asserts or deasserts at least one control signal to the switching structure, a timer (52) which instructs the sequencer (60) to initiate application of the voltage waveform and determines time elapsed since initiating application, and a comparator (58) which compares the time period produced by the look-up table (54) and the elapsed time determined by the timer (52).

Abstract translation: 用于在基板上产生灰度图像的点尺寸可调节按需喷墨打印头（2）。 喷墨打印头（2）包括具有延伸穿过其中的墨水输送通道（6）的主体部分（14）和耦合到墨水输送通道（6）的压电致动器（34）。 选择在从墨水输送通道（6）喷射之后撞击基板时形成的液滴的光斑尺寸，并且查找表（54）将所选择的光点尺寸转换为电压脉冲将在该时间段内 通过相关联的开关结构（62）施加到压电致动器（34）以开始施加电压波形，确定电压波形是否已经施加到压电致动器（34）一段时间并终止施加电压波形 期限届满时。 所述控制电路包括定序器（60），其选择性地向所述开关结构断言或解除至少一个控制信号;定时器（52），其指示所述定序器（60）开始施加所述电压波形并确定自启动应用以来经过的时间 ，以及比较器（58），其比较由查找表（54）产生的时间周期和由定时器（52）确定的经过时间。

公开(公告)号：WO1994027825A1

公开(公告)日：1994-12-08

申请号：PCT/US1994005519

申请日：1994-05-13

Applicant: COMPAQ COMPUTER CORPORATION

Inventor： COMPAQ COMPUTER CORPORATION ,  HAYES, Donald, J. ,  STORTZ, James, L.

IPC: B41J02/16

CPC classification number: B41J2/1609 ,  B41J2/14209 ,  B41J2/1623 ,  B41J2/1632 ,  B41J2/1643 ,  Y10T29/42 ,  Y10T29/49401

Abstract: A single side interconnectable ink jet printhead and an associated method for manufacturing the same. The ink jet printhead includes a lower body portion (14) having a plurality of conductive sections (16) mounted to a top side (14a) of the lower body portion (14) and a corresponding plurality of conductive pins (20) projecting from a bottom side (14b) of the lower body portion (14). Each of the conductive sections (16) is electrically connected to the corresponding one of the conductive pins (10). A bottom side surface of each one of a plurality of generally parallel, longitudinally extending first intermediate body portions each formed of an active piezoelectric material poled in a first direction parallel to the top side surface of the lower body portion is conductively mounted to a portion of the top side surface of the lower body portion. A bottom side surface of each one of a plurality of generally parallel, longitudinally extending second intermediate body portions, each formed of an active piezoelectric material poled in a second direction opposite the first direction is conductively mounted to a top side surface of a corresponding one of the first intermediate body portions and a bottom side surface of an insulative upper body portion is conductively mounted to a top side surface of each of the plurality of second intermediate body portions.

Abstract translation: 单面可互连喷墨打印头及其制造方法。 喷墨打印头包括下主体部分（14），其具有安装到下主体部分（14）的顶侧（14a）的多个导电部分（16）和相应的多个导电部分（20） 下主体部分（14）的底侧（14b）。 每个导电部分（16）电连接到对应的一个导电引脚（10）。 多个大致平行的纵向延伸的第一中间体的每一个的底侧表面各自由平行于下主体部分的顶侧表面的第一方向极化的有源压电材料形成，导电地安装到 下主体部分的顶侧表面。 多个大致平行的纵向延伸的第二中间体部分中的每一个的底侧表面各自由与第一方向相反的第二方向极化的有源压电材料导电地安装到相应的一个的顶侧表面 绝缘上部主体部分的第一中间体部分和底侧表面被导电地安装到多个第二中间体部分的每一个的顶侧表面上。

公开(公告)号：WO1994026520A1

公开(公告)日：1994-11-24

申请号：PCT/US1994005059

申请日：1994-05-03

Applicant: COMPAQ COMPUTER CORPORATION

Inventor： COMPAQ COMPUTER CORPORATION ,  STORTZ, James, L.

IPC: B41J02/045

CPC classification number: B41J2/04543 ,  B41J2/04581 ,  B41J2202/10

Abstract: A differential drive system is used to actuate an ink jet printhead (10) having a spaced, parallel series of internal ink receiving channels opening outwardly through ink discharge orifices formed in the printhead body (12). The channels (32) are laterally bounded by a spaced series of piezoelectrically deflectable internal sidewall actuator sections of the printhead body (12) interdigitated with the channels. The printhead body (12) is specially configured to facilitate wiring access to spaced apart first and second electrical connection portions on each of the actuators. Electrical leads (56) from a first controller (58) are connected to the first actuator portions and are ganged in groups that are selectively connected to a driving voltage source, or to ground, by the first controller (58). A second controller (70) has a first set of electrical leads (68) similarly ganged in groups and connected to a first set of the second actuator portions, and a second set of unganged electrical leads individually connected to the rest of the second actuator portions. The second controller is operative to selectively connect any of its individual leads, or any of its ganged lead groups, to the driving voltage source or to ground. In conjunction with the dual controllers (58, 70), this combination of ganged and individually addressable leads connected to the first and second actuator portions permits the actuators to be differentially driven in a manner digitally synthesizing a more complex bipolar drive system.

Abstract translation: 差分驱动系统用于致动喷墨打印头（10），其具有间隔开的，平行的内部油墨接收通道系列，其通过形成在打印头主体（12）中的排墨孔向外打开。 通道（32）由与通道交叉指向的打印头主体（12）的间隔开的一系列压电可偏转的内部侧壁致动器部分横向界定。 打印头本体（12）被特别地配置成便于接近每个致动器上间隔开的第一和第二电连接部分。 来自第一控制器（58）的电引线（56）连接到第一致动器部分，并且被组合成由第一控制器（58）选择性地连接到驱动电压源或接地的组。 第二控制器（70）具有类似地组合并连接到第一组第二致动器部分的第一组电引线（68）和与第二致动器部分的其余部分分别连接的第二组非接地电引线 。 第二控制器可操作以选择地将其各个引线或其任何组合的引线组连接到驱动电压源或接地。 结合双控制器（58,70），连接到第一和第二致动器部分的组合和可单独寻址的引线的组合允许致动器以数字合成更复杂的双极驱动系统的方式进行差分驱动。

公开(公告)号：WO1994026524A1

公开(公告)日：1994-11-24

申请号：PCT/US1994005132

申请日：1994-05-04

Applicant: COMPAQ COMPUTER CORPORATION

Inventor： COMPAQ COMPUTER CORPORATION ,  STORTZ, James, L. ,  WALLACE, David, B.

IPC: B41J02/045

CPC classification number: B41J2/14209 ,  B41J2/04541 ,  B41J2/04581 ,  B41J2/04588

Abstract: A digital driver (12, 54) for an ink jet printhead (10) and an associated method for selectively applying voltage to a piezo-electric sidewall actuator (34) of the ink jet printhead. The digital driver (54) includes positive (V+) and negative voltage sources (V-), a first switching element (56) having a first control input (60), a first voltage supply input (62) connected to the positive voltage source (V+), and a first ouput (64), and a second switching element (58) having a second control input (61), a second voltage supply input (63) connected to the negative voltage source (V-), and a second output (65) connected to the first output (64) to provide a single output (28) connected to the piezoelectric sidewall actuator (34). By asserting the first control input (66) for a first time period, the first switching element (56) generates a positive voltage pulse (70) at the single output to displace the sidewall actuator (34) from a rest position to a first position. Next, by simultaneously deasserting the first control input (66) and asserting the second control input (68), the second switching element (58) generates a negative voltage pulse (74) at the single output to displace the sidewall actuator (34) from the first position, past the rest position, to a second position. Next, by deasserting the second control input (68), the sidewall actuator (34) passively returns to the rest position. The return to the rest position may be assisted by discharging the printhead (10) after deassertion of the second control input (68), by re-applying the first voltage for a second, shorter, time period to actively drive the sidewall actuator (34) towards the rest position, or by both.

Abstract translation: 一种用于喷墨打印头（10）的数字驱动器（12,54）和用于选择性地向喷墨打印头的压电侧壁致动器（34）施加电压的相关方法。 数字驱动器（54）包括正（V +）和负电压源（V-），具有第一控制输入（60）的第一开关元件（56），连接到正电压源的第一电压供应输入 （V +）和第一输出（64）以及具有第二控制输入（61）的第二开关元件（58），连接到负电压源（V-）的第二电压供给输入端（63） 第二输出（65）连接到第一输出端（64），以提供连接到压电侧壁致动器（34）的单个输出（28）。 通过在第一时间段内确定第一控制输入（66），第一开关元件（56）在单个输出处产生正电压脉冲（70），以使侧壁致动器（34）从静止位置移动到第一位置 。 接下来，通过同时解除第一控制输入（66）和断言第二控制输入（68），第二开关元件（58）在单个输出处产生负电压脉冲（74），以使侧壁致动器（34）从 第一个位置，通过休息位置，到第二个位置。 接下来，通过解除第二控制输入（68），侧壁致动器（34）被动地返回到静止位置。 可以通过在第二个较短的时间周期之后重新施加第一电压来主动驱动侧壁致动器（34）来辅助通过在第二控制输入端（68）解除驱动之后将打印头（10） ）朝向休息位置，或由两者。

公开(公告)号：WO1994026523A1

公开(公告)日：1994-11-24

申请号：PCT/US1994005066

申请日：1994-05-03

Applicant: COMPAQ COMPUTER CORPORATION

Inventor： COMPAQ COMPUTER CORPORATION ,  STORTZ, James, L. ,  WALLACE, David, B.

IPC: B41J02/045

CPC classification number: B41J2/04581 ,  B41J2/04541 ,  B41J2/14209 ,  B41J2202/10

Abstract: A switched digital drive system is used to actuate an ink jet printhead (10) having a spaced, parallel series of internal ink receiving channels (32) opening outwardly at front ends thereof through ink discharge orifices (24) formed in the printhead body (14). The channels are laterally bounded by a spaced series of piezoelectrically deflectable internal sidewall sections of the printhead body interdigitated with the channels. The drive system (12) includes a series of electrical actuation leads (28) each connected to a different one of the sidewall sections (34a), and dual transistor switch structures connected in the leads with each switch, in turn, connected to positive and negative DC voltage sources. To actuate a selected channel, the switches associated with its opposite bounding sidewall sections are operated in a manner sequentially (1) deflecting the sidewall sections outwardly away from initially undeflected positions thereof by imposing constant, opposite polarity voltages thereon, (2) reversing the polarities of the constant voltages to deflect the sidewall sections into the channel, and then (3) imposing a series of voltage pulses of sequentially opposite polarities on each of the inwardly deflected sidewall sections to controllably return them to their initial undeflected positions.

Abstract translation: 切换数字驱动系统用于致动喷墨打印头（10），喷墨打印头（10）具有间隔开的平行的一系列内部油墨接收通道（32），其通过形成在打印头主体（14）中的喷墨孔（24）的前端向外打开 ）。 这些通道由与通道相互指向的打印头主体的间隔开的一系列可压电偏转的内部侧壁部分横向界定。 驱动系统（12）包括一系列电致动引线（28），每个连接到不同的一个侧壁部分（34a），并且每个开关连接到引线中的双晶体管开关结构又连接到正极和 负直流电压源。 为了致动所选择的通道，与其相对的边界侧壁部分相关联的开关以顺序地操作（1）通过在其上施加恒定的相反极性电压使侧壁部分偏离其初始未偏转位置，（2）使极性反转 的恒定电压以将侧壁部分偏转到通道中，然后（3）在每个向内偏转的侧壁部分上施加一系列具有相反极性的电压脉冲，以可控制地将它们返回到它们的初始未偏转位置。

公开(公告)号：WO1994026521A1

公开(公告)日：1994-11-24

申请号：PCT/US1994005060

申请日：1994-05-04

Applicant: COMPAQ COMPUTER CORPORATION

Inventor： COMPAQ COMPUTER CORPORATION ,  WILLIAMSON, Ralph, K. ,  STORTZ, James, L.

IPC: B41J02/045

CPC classification number: B41J2/04581 ,  B41J2/04588 ,  B41J2202/10

Abstract: A digital driver (12) for an ink jet printhead (10) and an associated method for selectively applying voltage to a piezoelectric sidewall actuator of the printhead. The digital driver includes positive, negative and neutral voltage sources, a first switching element (56) having a first control input (60), a first voltage supply input (62) connected to the positive voltage source and a first output (64), a second switching element (58) having a second control input (61), a second voltage supply input connected to the negative voltage source and a second output (65), and a third switching element (70) having a third control input (71), a third voltage supply input connected to the neutral voltage source and a third output (75). The first, second and third outputs are connected together to provide a common output (28) for connection to the piezoelectric sidewall actuator. By asserting the first control input for a first time period, the first switching element (56) generates a positive voltage pulse at the common output to displace the sidewall actuator from a rest position to a first position. Next, by simultaneously deasserting the first control input and asserting the second control input, the second switching element (58) generates a negative voltage pulse at the common output to displace the sidewall actuator from the first position, past the rest position, to a second position. Finally, by deasserting the second control input and asserting the third control input, a path to ground potential is provided at the common output, thereby driving the return of the sidewall actuator to the rest position.

Abstract translation: 一种用于喷墨打印头（10）的数字驱动器（12）以及用于向打印头的压电侧壁致动器选择性地施加电压的相关方法。 数字驱动器包括正，负和中性电压源，具有第一控制输入（60）的第一开关元件（56），连接到正电压源的第一电压供应输入端（62）和第一输出端（64）， 具有第二控制输入（61）的第二开关元件（58），连接到所述负电压源的第二电压源输入端和第二输出端（65），以及具有第三控制输入端（71）的第三开关元件 ），连接到中性电压源的第三电压电源输入端和第三输出端（75）。 第一，第二和第三输出端连接在一起以提供用于连接到压电侧壁致动器的公共输出端（28）。 通过在第一时间段内确定第一控制输入，第一开关元件（56）在公共输出端产生正电压脉冲，以将侧壁致动器从静止位置移位到第一位置。 接下来，通过同时解除第一控制输入并断言第二控制输入，第二开关元件（58）在公共输出端产生负电压脉冲，以将侧壁致动器从第一位置移动到静止位置， 位置。 最后，通过解除第二控制输入并断言第三控制输入，在公共输出处提供接地电位的路径，从而驱动侧壁致动器返回到静止位置。

公开(公告)号：EP0699136B1

公开(公告)日：1997-10-08

申请号：EP94916042.8

申请日：1994-05-04

Applicant: Compaq Computer Corporation

Inventor： STORTZ, James, L.

IPC: B41J2/205

CPC classification number: B41J2/2128 ,  B41J2202/10

Abstract: A spot size modulatable, drop-on-demand type ink jet printhead (2) for producing grey-scale images on a substrate. The ink jet printhead (2) includes a main body portion (14) having an ink-carrying channel (6) extending therethrough and a piezoelectric actuator (34) coupled to the ink-carrying channel (6). A spot size for droplets to form when striking the substrate after ejection from the ink-carrying channel (6) is selected and a look-up table (54) translates the selected spot size into a time period during which a voltage pulse is to be applied to the piezoelectric actuator (34) by an associated switching structure (62) to initiate application of the voltage waveform, determines whether the voltage waveform has been applied to the piezoelectric actuator (34) for the time period and terminates application of the voltage waveform upon expiration of the time period. The control circuit includes a sequencer (60) which selectively asserts or deasserts at least one control signal to the switching structure, a timer (52) which instructs the sequencer (60) to initiate application of the voltage waveform and determines time elapsed since initiating application, and a comparator (58) which compares the time period produced by the look-up table (54) and the elapsed time determined by the timer (52).

公开(公告)号：EP0699136A1

公开(公告)日：1996-03-06

申请号：EP94916042.0

申请日：1994-05-04

Applicant: Compaq Computer Corporation

Inventor： STORTZ, James, L.

IPC: B41J2

CPC classification number: B41J2/2128 ,  B41J2202/10

Abstract: A spot size modulatable, drop-on-demand type ink jet printhead (2) for producing grey-scale images on a substrate. The ink jet printhead (2) includes a main body portion (14) having an ink-carrying channel (6) extending therethrough and a piezoelectric actuator (34) coupled to the ink-carrying channel (6). A spot size for droplets to form when striking the substrate after ejection from the ink-carrying channel (6) is selected and a look-up table (54) translates the selected spot size into a time period during which a voltage pulse is to be applied to the piezoelectric actuator (34) by an associated switching structure (62) to initiate application of the voltage waveform, determines whether the voltage waveform has been applied to the piezoelectric actuator (34) for the time period and terminates application of the voltage waveform upon expiration of the time period. The control circuit includes a sequencer (60) which selectively asserts or deasserts at least one control signal to the switching structure, a timer (52) which instructs the sequencer (60) to initiate application of the voltage waveform and determines time elapsed since initiating application, and a comparator (58) which compares the time period produced by the look-up table (54) and the elapsed time determined by the timer (52).

公开(公告)号：EP0699134A1

公开(公告)日：1996-03-06

申请号：EP94917321.0

申请日：1994-05-03

Applicant: Compaq Computer Corporation

Inventor： WALLACE, David, B. ,  STORTZ, James, L.

IPC: B41J2

CPC classification number: B41J2/14209 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2002/14379 ,  B41J2002/14491

Abstract: An ink jet printhead (10) and an associated method for operatively driving the ink jet printhead (10) to cause the ejection of a volume modulatable droplet from an ink-carrying channel (32) thereof partially defined by a piezoelectric sidewall actuator (34). The voltage (53) applied across the sidewall actuator (34) is raised from a rest voltage (54) to a first voltage to deflect the sidewall actuator (34) from a rest position to a first position and maintained at the first voltage for a first period of time. The voltage applied across the sidewall actuator (34) is then dropped to a second voltage, lower than the rest voltage, to deflect the sidewall actuator from the first position, past the rest position, to a second position and maintained at the second voltage for a second period of time. The voltage applied across the sidewall actuator (34) is then returned to the rest voltage (54) to deflect the sidewall actuator (34) back to the rest position. The first and second time periods are selected, relative to each other, to select a droplet volume for ink ejected from the ink-carying channel. The voltage applied across the sidewall actuator is then returned to the rest voltage, thereby causing the ejection of a droplet of ink having the selected droplet volume.