Full color active matrix organic electroluminescent display panel having an integrated shadow mask
AssigneeEastman Kodak Company
InventorsChing W. Tang, Kee-Chuan Pan
Life of this patent
Estimating the term…
Abstract
A full-color active matrix organic light-emitting color display panel is disclosed which has an integrated shadow mask structure for patterning arrays of color subpixels. The in-situ shadow mask structure is prepatterned on the display substrate by conventional photolithography, and provides a simple, self-alignment feature for successive deposition of color organic electroluminescent (EL) media on designated color subpixel areas. The pillar structure of the shadow mask are particularly effective in the fabrication of high-resolution full-color organic light-emitting diode displays having either color conversion layers or individual red, green, and blue emissive layers.
Claims18
A full-color active matrix organic electroluminescent (EL) display panel, comprising:
- a) a substrate;
- b) a plurality of color pixels formed on the substrate;
- c) each color pixel containing three primary color (red, green, and blue) subpixels;
- d) an active matrix electrical addressing element associated with each color subpixel;
- e) an integrated shadow mask for forming the color subpixels including a plurality of pillar structures erected on the substrate;
- f) the pillar structures having a geometric arrangement which permits the formation of each color subpixel independent of the formation of the other two color subpixels and wherein the formation of each color subpixel is provided by a line-of-sight vapor deposition for selective patterning the color subpixel;
- and
- a common light-transmissive electrode over the plurality of color pixel;
- wherein said vapor deposition in a red, green or blue subpixel extends upwardly along an adjacent pillar beyond the corresponding subpixel.
A full-color active matrix organic electroluminescent (EL) display panel, comprising:
- a) a substrate;
- b) a plurality of color pixels formed on the substrate;
- c) each color pixel containing three primary color (red, green, and blue) subpixels;
- d) an active matrix electrical addressing element associated with each color subpixel;
- e) an integrated shadow mask for forming the color subpixels including a pluraltiy of pillar structures erected on the substrate;
- f) the pillar structures having a geometric arrangement which permits the formation of each color subpixel independent of the formation of the other two color subpixels and wherein the formation of each color subpixel is provided by a line-of-sight vapor deposition for selective patterning the color subpixel;
- g) each color sub-pixel having an electroluminescent (EL) emitter with an emissive layer capable of producing a primary color;
- and
- h) a common light-transmissive electrode over the EL emitter,
- wherin said vapor deposition in a red, green or blue subpixel extends upwardly along an adjacent pillar beyond the corresponding subpixel.
Dependencies are inferred from the claim text.