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公开(公告)号：DE69525821T2
公开(公告)日：2002-09-19
申请号：DE69525821
申请日：1995-12-14
Applicant: COMPAQ COMPUTER CORP
Inventor： GOOD LOWELL M , WALLACE DAVID B
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公开(公告)号：AU6827594A
公开(公告)日：1994-12-12
申请号：AU6827594
申请日：1994-05-03
Applicant: COMPAQ COMPUTER CORP
Inventor： STORTZ JAMES L , WALLACE DAVID B
Abstract: A switched digital drive system is used to actuate an ink jet printhead having a spaced, parallel series of internal ink receiving channels opening outwardly at front ends thereof through ink discharge orifices formed in the printhead body. 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 includes a series of electrical actuation leads each connected to a different one of the sidewall sections, 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.
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公开(公告)号：AU647653B2
公开(公告)日：1994-03-24
申请号：AU2102492
申请日：1992-08-13
Applicant: COMPAQ COMPUTER CORP
Inventor： PIES JOHN R , WALLACE DAVID B , HAYES DONALD J
Abstract: Method for manufacturing a sidewall actuatable, high density channel array for an ink jet printhead. A first surface of a main body portion formed from an inactive material is conductively bonded to a first surface of a first intermediate body portion formed from an active material. A plurality of parallel grooves are then machined through the first intermediate body portion and part of the main body portion to form a plurality of channels separated by a corresponding plurality of sidewall actuators comprised of a first sidewall section formed from an inactive material and a second sidewall section formed from an active material. A top body portion is then conductively mounted to the intermediate body portion.
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公开(公告)号：DE69511470T2
公开(公告)日：1999-12-16
申请号：DE69511470
申请日：1995-06-06
Applicant: COMPAQ COMPUTER CORP
Inventor： WALLACE DAVID B
Abstract: A method of producing, on a physical medium, a gradient tonal representation of an image and a printhead for producing the same. An input image is divided into first and second regions. First, continuously variable intensity level, continuous tone and second, discretely variable intensity level, half-tone portions of the representation which respectively correspond to the first and second regions of the image are then printed by depositing selected quantities of ink on the first and second portions of the physical medium such that each pixel thereof has an ink intensity level corresponding to the image intensity level for the corresponding one of the pixels of the first region of the image. The ink is deposited on the second portion of the physical medium by depositing a spot of ink having a first diameter on selected ones of the pixels of the second portion, depositing a spot of ink having a second diameter on others of the pixels of the second portion and depositing no ink on still others of the pixels of the second portion such that the second portion of the representation has the desired ink intensity level. The color of the ink ejected may be black, in which case, the gradient tonal representation produced thereby shall be a gray scale representation, or other color such as yellow, cyan or magenta.
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公开(公告)号：DE69215790T2
公开(公告)日：1997-06-12
申请号：DE69215790
申请日：1992-08-13
Applicant: COMPAQ COMPUTER CORP
Inventor： PIES JOHN R , WALLACE DAVID B , HAYES DONALD J
Abstract: An ink jet printhead (10) for a drop-on-demand type ink jet printing system. The printhead includes a base section (12) having a series of generally parallel spaced projections (30) extending longitudinally therealong, a series of intermediate sections (32) conductively mounted on a top side of a corresponding one of the series of base section projections (30) and a top section (16) conductively mounted to a top side of each of the series of intermediate sections (32).
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Patent Agency Ranking
公开(公告)号：AT144195T
公开(公告)日：1996-11-15
申请号：AT93908464
申请日：1993-03-22
Applicant: COMPAQ COMPUTER CORP
Inventor： PIES JOHN R , WALLACE DAVID B , HAYES DONALD J
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7.发明专利
公开(公告)号：CA2151093A1
公开(公告)日：1995-12-16
申请号：CA2151093
申请日：1995-06-06
Applicant: COMPAQ COMPUTER CORP
Inventor： WALLACE DAVID B
Abstract: A method of producing, on a physical medium, a gradient tonal representation of an image and a printhead for producing the same. An input image is divided into first and second regions. First, continuously variable intensity level, continuous tone and second, discretely variable intensity level, half-tone portions of the representation which respectively correspond to the first and second regions of the image are then printed by depositing selected quantities of ink on the first and second portions of the physical medium such that each pixel thereof has an ink intensity level corresponding to the image intensity level for the corresponding one of the pixels of the first region of the image. The ink is deposited on the second portion of the physical medium by depositing a spot of ink having a first diameter on selected ones of the pixels of the second portion, depositing a spot of ink having a second diameter on others of the pixels of the second portion and depositing no ink on still others of the pixels of the second portion such that the second portion of the representation has the desired ink intensity level. The color of the ink ejected may be black, in which case, the gradient tonal representation produced thereby shall be a gray scale representation, or other color such as yellow, cyan or magenta.
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公开(公告)号：AU6785794A
公开(公告)日：1994-11-21
申请号：AU6785794
申请日：1994-04-28
Applicant: COMPAQ COMPUTER CORP
Inventor： HAYES DONALD J , WALLACE DAVID B
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公开(公告)号：BR9203186A
公开(公告)日：1993-04-06
申请号：BR9203186
申请日：1992-08-17
Applicant: COMPAQ COMPUTER CORP
Inventor： PIES JOHN R , WALLACE DAVID B , HAYES DONALD J
Abstract: An ink jet printhead (10) for a drop-on-demand type ink jet printing system. The printhead includes a base section (12) having a series of generally parallel spaced projections (30) extending longitudinally therealong, a series of intermediate sections (32) conductively mounted on a top side of a corresponding one of the series of base section projections (30) and a top section (16) conductively mounted to a top side of each of the series of intermediate sections (32).
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公开(公告)号：IE922584A1
公开(公告)日：1993-02-24
申请号：IE922584
申请日：1992-08-14
Applicant: COMPAQ COMPUTER CORP
Inventor： PIES JOHN R , WALLACE DAVID B , HAYES DONALD J
Abstract: Method for manufacturing a sidewall actuatable, high density channel array for an ink jet printhead. A first surface of a main body portion formed from an inactive material is conductively bonded to a first surface of a first intermediate body portion formed from an active material. A plurality of parallel grooves are then machined through the first intermediate body portion and part of the main body portion to form a plurality of channels separated by a corresponding plurality of sidewall actuators comprised of a first sidewall section formed from an inactive material and a second sidewall section formed from an active material. A top body portion is then conductively mounted to the intermediate body portion.
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