Method of arranging the cells within the pixels of a color alpha-numeric display device

• US 4,892,391 A
• Filed: 01/30/1989
• Issued: 01/09/1990
• Est. Priority Date: 02/16/1988
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Stewart, Wilber C., Roach, William R., Pica, Albert P.
• Primary Examiner(s): Miller, Stanley D.
• Assistant Examiner(s): GROSS, ANITA P
• Application Number:
  US07/303,997
• Time in Patent Office: 344 Days
• Field of Search: 350/339 F, 340/701, 340/702, 340/703, 358/56, 358/71, 358/240
• US Class Current: 349/143
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607

Abstract

An improved method of arrangement for the cells comprising the pixels of a display device wherein each of the pixels includes a brightest cell, a bright cell, a medium cell and a dark cell. The brightest cell and the bright cell are aligned substantially parallel to one the display axes and the bright cell and the dark cell are diagonally aligned with respect to the axes of the dipslay.

Claims

1. A method for producing straight vertical and horizontal alpha-numeric lines and for producing upwardly and downwardly sloping alpha-numeric lines having the same overall appearance in a display device having an array of multi-cell pixels arranged along horizontal and vertical axes, wherein each of said pixels includes a white cell, a green cell, a red cell and a blue cell comprising the steps of:

arranging said white cell and said green cell substantially parallel to one of said axes; and

aligning said green cell and said blue cell diagonally with respect to the other of said axes.

2. The method of claim 1 further including the step of operating said cells as bilevel devices.

3. A method for producing straight vertical and horizontal alpha-numeric lines and for producing upwardly and downwardly sloping alpha-numeric lines having the same overall appearance in a display device having an array of multi-cell liquid crystal pixels arranged along horizontal and vertical axes, wherein each of said pixels includes a white cell, a green cell, a red cell and a blue cell comprising the steps of:

arranging said white cell and said green cell substantially parallel to one of said axes; and

aligning said green cell and said blue cell diagonally with respect to the other of said axes.

4. The method of claim 3 further including the step of operating said cells as bilevel devices.