Patents by Inventor Godefridus P. Van Melis

Godefridus P. Van Melis 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).

  • Color display device having color filter layers
    Patent number: 6690107
    Abstract: A transparent inorganic intermediate layer extends between a color filter layer and a phosphor layer in a color display device. The intermediate layer stops electrons before they can penetrate the color filter layer. Aging phenomena which adversely affect the effectiveness of the color filter layer are thus precluded. It is alternatively possible to use hitherto useless pigments, in particular pigments which are unstable when they are exposed to an electron bombardment in the color filter layer (or layers). By virtue thereof, the effectiveness of the color filter layer has been increased.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: February 10, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Arie R. Van Doorn, Remko Horne, Godefridus P. Van Melis
  • Display device having a display window, a phosphor pattern and a color filter pattern between the display window and the phosphor pattern
    Patent number: 6590330
    Abstract: A display device comprises a color filter pattern between a phosphor pattern and a display window. For blue, the thickness (t2) of this color filter pattern is more than 2.5 micrometer, preferably 5-7 micrometer, and/or for red said thickness is 0.25-1.5 micrometer. The red and/or blue color filter patterns are provided by means of a non-linear photoresist. This enables an improved contrast (LCP) to be achieved.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: July 8, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
  • Method of manufacturing a color display device and a color display device
    Patent number: 6558857
    Abstract: A display device comprises a color filter pattern between a phosphor pattern and a display window. For blue, the thickness (t2) of this color filter pattern is more than 2.5 micrometer, preferably 5-7 micrometer, and/or for red said thickness is 0.25-1.5 micrometer. The red and/or blue color filter patterns are provided by means of a non-linear photoresist. This enables an improved contrast (LCP) to be achieved.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: May 6, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
  • Method of manufacturing a color display device and a color display device
    Publication number: 20020014828
    Abstract: A display device comprises a color filter pattern between a phosphor pattern and a display window. For blue, the thickness (t2) of this color filter pattern is more than 2.5 micrometer, preferably 5-7 micrometer, and/or for red said thickness is 0.25-1.5 micrometer. The red and/or blue color filter patterns are provided by means of a non-linear photoresist. This enables an improved contrast (LCP) to be achieved.
    Type: Application
    Filed: February 26, 2001
    Publication date: February 7, 2002
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
  • Color display device with phosphor regions and corresponding color-filter layers
    Patent number: 5952776
    Abstract: A color display device is provided with a black-matrix layer, a phosphor pattern and color-filter layers. The theological behavior of the suspension and/or the evaporation of volatile constituents is influenced by the topology of the color-filter layers, with, in particular, projecting color-filter layers exerting an influence. As a result, variations in thickness between the phosphor layers occur. By reducing the differences in height between a projecting color-filter layer and the black-matrix layer, the variations in thickness between the phosphor layers are reduced and hence the quality of the picture displayed is improved.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: September 14, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
  • Color display device with phosphor regions for emitting red, blue and green light through red-blue color-filler layers and apertures in a black-matrix layer
    Patent number: 5942848
    Abstract: A color display device for emitting, in operation, red, blue and green light having a substrate provided with a black matrix and only blue and red color filter layers.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: August 24, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
  • Method of manufacturing a color display device comprising color-filter layers
    Patent number: 5871873
    Abstract: In the manufacture of a color-display device comprising color-filter layers, phosphor haze may occur. Said phosphor haze adversely affects the picture quality. Phosphor haze can be reduced substantially, or precluded, by providing one, and only one, of the color-filter layers by means of a negative lithography process and, subsequently, providing the phosphor corresponding to this color-filter layer before the other phosphor layers.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: February 16, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis