Electroluminescent color display panel
AssigneeKoninklijke Philips Electronics N.V.
InventorsPaulus Cornelis Duineveld, Pieter Jacob Snijder, Coen Theodorus Hubertus Fransiscus Liedenbaum
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Abstract
The positional arrangement of the color section in each pixel of an electroluminescent display panel is different from the positional arrangement of the color sections in at least one adjacent pixel. This yields an improved image quality as perceived by the viewer, in particular when moving images are displayed on low-resolution displays. A preferred embodiment of the invention is an electroluminescent display panel in which the color sections are arranged on continuous lines, which are oriented to run diagonally across the display panel.
Claims17
An electroluminescent color display panel comprising a plurality of pixels arranged in rows and columns to form a grid pattern, each pixel comprising at least two color sections, a first color section of which emits light of a first color, and a second color section emits light of a second color being different from the first color,
- wherein the positional arrangement of the first and second color sections within a first one of the pixels, further referred to as the first pixel, is different from the positional arrangement of the first and second color sections within a second one of the pixels, further referred to as the second pixel,
- wherein the first pixel is adjacent to the second pixel,
- wherein the first color sections are adjacently arranged on parallel, laterally spaced apart, slanting lines with respect to the column direction, and
- wherein the acute angle between a vertical column and the slanting lines is in a range of +10 and −10 degrees around a preferred angle α, and the preferred angle α is equal to:
- α = arctan ( P r nP c )
- wherein n is the number of color sections in a pixel, Pr is the pitch of the pixels in the row direction, and Pc is the pitch of the pixels in the column direction.
A method of manufacturing an electroluminescent color display panel, said method comprising:
- forming a plurality of parallel, laterally spaced first electrode strips on a substrate,
- arranging a plurality of parallel, laterally spaced electroluminescent strips, each strip, in operation, emitting light of one of at least a first or a second color, wherein strips of different colors are positioned side by side, in a repeating pattern, and
- forming a plurality of parallel, laterally spaced second electrode strips, which second electrode strips cross the plurality of first electrode strips such that, in operation, an individual light-emitting device is allocated at the crossing of a first and a second electrode strip,
- wherein the electroluminescent strips are arranged on a plurality of parallel, laterally spaced slanting lines with respect to a grid formed by the first and second electrode strips;
- and
- wherein the acute angle between the first or the second electrode strip and a slanting line is in a range of +10 and −10 degrees around a preferred angle α, and the preferred angle α is equal to:
- α = arctan ( P r nP c )
- wherein n is the number of color sections in a pixel, Pr is the pitch of the pixels in the row direction, and Pc is the pitch of the pixels in the column direction.
An electroluminescent color display panel comprising:
- a plurality of parallel, laterally spaced row electrodes;
- a plurality of parallel, laterally spaced electroluminescent strips, each strip, in operation, emitting light of one of at least a first or a second color, wherein strips of different colors are positioned side by side, in a repeating pattern;
- and
- a plurality of parallel, laterally spaced column electrodes, said column electrodes crossing the plurality of row electrodes such that, in operation, an individual light-emitting device is allocated at the crossing of a row and a column electrode,
- wherein the electroluminescent strips are arranged on a plurality of parallel, laterally spaced slanting lines with respect to a grid formed by the row and column electrodes, and
- wherein each of the column electrodes has a stepped pattern such that no straight line extends along a border of the column electrode from a top to a bottom thereof.
Dependencies are inferred from the claim text.