Patents by Inventor Ralph Cisneros

Ralph Cisneros has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5726529
    Abstract: A spacer (200) for a field emission display (201) is disclosed. The spacer (200) includes a lower resistive region (220) and an upper insulative region (222). The spacer (200) has a member (210) which is coated with a resistive coating (212) extending between the lower end of the member and a height (h.sub.2) less than the total height (h.sub.1) of the spacer (200). An insulative coating (218) is formed on the member (210) and extends between the upper end of the resistive coating (212) and the upper end of the member (210). The resistive coating (212) has a secondary electron yield less than 2 over the lower resistive region (220) of the spacer (200). The insulative coating (218) has a secondary electron yield between 0.75-2 over the upper insulative region (222) of the spacer (200).
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: March 10, 1998
    Assignee: Motorola
    Inventors: Kenneth Dean, Ralph Cisneros, Kathleen Tobin
  • Patent number: 5719406
    Abstract: An improved field emission device (200, 800) includes a supporting substrate (210, 810), a conductive layer (215, 815) formed on the supporting substrate (210,810), a dielectric layer (240, 840) formed on the conductive layer (215, 815) and defining an emitter well (260, 860), a charge bleed-off barrier (290, 890)provided on the lateral surfaces (245, 845) of the emitter well, an electron emitter (270, 870) located within the emitter well (260, 860), a gate extraction electrode (250, 850) formed on the dielectric layer (240, 840) and spaced from the electron emitter (270, 870), and an anode (280, 880) spaced from the gate extraction electrode (250, 850).
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: February 17, 1998
    Assignee: Motorola, Inc.
    Inventors: Ralph Cisneros, John Song
  • Patent number: 5689278
    Abstract: A display (10) utilizes a drive scheme that minimizes power dissipation by reducing the operating frequency at which columns (12) operate. The operating frequency is reduced by positioning column timing signals (32) near an end of a horizontal display time (38,39,48,49) if the next horizontal display time also has data to be displayed.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: November 18, 1997
    Assignee: Motorola
    Inventors: Dean Barker, Ralph Cisneros
  • Patent number: 5610478
    Abstract: Emitters (14, 16, 17, 18) of a field emission display (10) are conditioned to improve electron emission. The emitters (14, 16, 17, 18) and the rows (21, 22) are operated at voltages that stimulate electron emission from the emitters (14, 16, 17, 18). An anode (23) is operated at a voltage that does not attract electrons so that the electrons are attracted to the rows (21, 22).
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: March 11, 1997
    Assignee: Motorola
    Inventors: Yumiko Kato, Ralph Cisneros
  • Patent number: 5528108
    Abstract: A field emission device (10) has an anode (18) that is used to attract electrons emitter by an emitter (13). An inductor (19) is coupled in series between the anode (18) and a voltage source (21) in order to prevent arcing between the anode (18) and the emitter (13) of the field emission device (10).
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: June 18, 1996
    Assignee: Motorola
    Inventor: Ralph Cisneros