Local seal for encapsulation of electro-optical element on a flexible substrate
AssigneeGlobal OLED Technology LLC
InventorRajeev Rohatgi
Life of this patent
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Abstract
An electroluminescent display or lighting product incorporates a panel including a collection of distinct light-emitting elements formed on a substrate. A plurality of distinct local seals are formed over respective individual light-emitting elements or groups of light-emitting elements. Each local seal is formed by depositing a low melting temperature glass powder suspension or paste using inkjet technology, and fusing the glass powder using a scanning laser beam having a tailored beam profile. The local seal may be used in conjunction with a continuous thin film encapsulation structure. Optical functions can be provided by each local seal, including refraction, filtering, color shifting, and scattering.
Claims16
A panel product incorporating an active light-emitting region comprising:
- a) a flexible substrate;
- b) a two-dimensional array of OLED elements formed on the flexible substrate;
- and
- c) a plurality of separate rigid local encapsulation seals adhered to respective areas over the substrate;
- wherein
- first and second neighboring OLED elements lie beneath separate first and second local encapsulation seals respectively,
- and
- for any direction following the surface of the substrate, the width of any one of the local encapsulation seals along that direction is less than one tenth the width of the flexible substrate along the same direction.
A flexible device having an integral two-dimensional array of electro-optical elements, the device comprising:
- a plurality of separate local encapsulation seals adhered over respective groups of the electro-optical elements;
- wherein
- first and second neighboring electro-optical elements lie beneath separate first and second local encapsulation seals respectively,
- and
- the aspect ratio of each local encapsulation seal is less than or equal to 2:1, and
- the maximum number of electro-optical elements underneath any one local encapsulation seal is not more than 4% of the number of electro-optical elements in the two-dimensional array of electro-optical elements.
Dependencies are inferred from the claim text.