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Display device for providing graphical display having a variable number of vertical and horizontal lines of resolution

  • US 6,570,548 B2
  • Filed: 02/06/2001
  • Issued: 05/27/2003
  • Est. Priority Date: 02/06/2001
  • Status: Expired due to Fees
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1. A display device for providing a graphical-type display having a variable number of vertical and horizontal lines of resolution, said device comprising:

  • a) a printed circuit board for mounting on a surface; and

    b) video chips disposed on, and electrically communicating with, said printed circuit board for selective illumination;

    wherein each video chip comprises a chip substrate that is square-shaped, and as a result thereof, has four edges that are coincidable with said four edges of said chip substrate of adjacent video chips, respectively, so as to form a matrix of chip substrates that have a predetermined number of rows and columns without any gaps therebetween by virtue of close edge tolerances so as to provide a full screen display device with no discernable edge effects;

    wherein each video chip further comprises a plurality of pins that depend from said chip substrate thereof and electrically communicate with said printed circuit board and said set of pins of adjacent video chips, respectively, so as to allow all said video chips to continue in sequence, both vertically and horizontally;

    wherein each video chip further comprises pixels that are disposed on said chip substrate thereof and electrically communicate with said plurality of pins thereof;

    wherein each pixel comprises a pixel substrate that is square-shaped, and as a result thereof, has four edges that are coincidable with said four edges of said pixel substrate of adjacent pixels, respectively, so as to form a matrix of pixel substrates that have a predetermined number of rows and columns;

    wherein each pixel further comprises a first contact that is disposed on said pixel substrate thereof and electrically communicates with a first individual pin of said plurality of pins of a respective video chip;

    wherein said first contact of each pixel electrically communicates with a different first individual pin of said plurality of pins of said respective video chip;

    wherein each pixel further comprises a second contact that is disposed on said pixel substrate thereof, is electrically independent from said first contact thereof, and electrically communicates with a second individual pin of said plurality of pins of said respective video chip;

    wherein said second contact of each pixel electrically communicates with a different second individual pin of said plurality of pins of a respective video chip;

    wherein each pixel further comprises a third contact that is disposed on said pixel substrate thereof, is electrically independent from said first contact thereof and said second contact thereof, and electrically communicates with a third individual pin of said plurality of pins of said respective video chip;

    wherein said third contact of each pixel electrically communicates with a different third individual pin of said plurality of pins of a respective video chip;

    wherein each pixel further comprises a fourth contact that is disposed on said pixel substrate thereof, is electrically independent from said first contact thereof, said second contact thereof, and said third contact thereof, and electrically communicates with a fourth individual pin of said plurality of pins of said respective video chip for going to ground;

    wherein said fourth contact of each pixel electrically communicates with a different fourth individual pin of said plurality of pins of a respective video chip;

    wherein each pixel further comprises a red LED that is disposed on said pixel substrate thereof and electrically communicates across said first contact thereof and said fourth contact thereof for selective illumination, and when illuminated, imparts a red color to said pixel;

    wherein each pixel further comprises a green LED that is disposed on said pixel substrate thereof and electrically communicates across said second contact thereof and said fourth contact thereof for selective illumination, and when illuminated, imparts a green color to said pixel;

    wherein each pixel further comprises a blue LED that is disposed on said pixel substrate thereof and electrically communicates across said third contact thereof and said fourth contact thereof for selective illumination, and when illuminates, imparts a blue color to said pixel;

    wherein said video chips are placed in an array of columns and rows, which are activated by vertical scanning and horizontal scanning for driving by square waves, and which are of a number dependant upon desired resolution;

    wherein said rows of said array of said video chips are supplied with a positive voltage to prevent conduction, by virtue of said red LED, said green LED, and said blue LED, by definition, being diodes, which by definition, allow conduction in only one direction;

    wherein said vertical scanning actives each row of said array of said video chips by reducing back voltage to zero; and

    wherein said horizontal scanning activates each column of said array of said video chips at three different levels for activating at least one of said red LED, said green LED, and said blue LED.

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