Plastic substrates for active matrix liquid crystal display incapable of withstanding processing temperature of over 200.degree. C and method of fabrication
First Claim
1. A method for formation of active matrix liquid crystal displays on plastic substrates, comprising:
- providing a pixel circuit containing a transistor on a plastic substrate;
said substrate being formed of material incapable of withstanding processing temperatures of over about 200°
C.;
providing a counter electrode; and
joining the pixel circuit and counter electrode using a liquid-crystal material.
5 Assignments
0 Petitions
Accused Products
Abstract
Bright-polarizer-free, active-matrix liquid crystal displays (AMLCDs) are formed on plastic substrates. The primary components of the display are a pixel circuit fabricated on one plastic substrate, an intervening liquid-crystal material, and a counter electrode on a second plastic substrate. The-pixel circuit contains one or more thin-film transistors (TFTs) and either a transparent or reflective pixel electrode manufactured at sufficiently low temperatures to avoid damage to the plastic substrate. Fabrication of the TFTs can be carried out at temperatures less than 100° C. The liquid crystal material is a commercially made nematic curvilinear aligned phase (NCAP) film. The counter electrode is comprised of a plastic substrate coated with a transparent conductor, such as indium-doped tin oxide (ITO). By coupling the active matrix with NCAP, a high-information content can be provided in a bright, fully plastic package. Applications include any low cost portable electronics containing flat displays where ruggedization of the display is desired.
90 Citations
19 Claims
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1. A method for formation of active matrix liquid crystal displays on plastic substrates, comprising:
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providing a pixel circuit containing a transistor on a plastic substrate; said substrate being formed of material incapable of withstanding processing temperatures of over about 200°
C.;providing a counter electrode; and joining the pixel circuit and counter electrode using a liquid-crystal material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A pixel element, comprising:
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a pixel circuit containing a transistor on a substrate incapable of withstanding processing temperatures of over about 200°
C.;a counter electrode; and an intervening liquid-crystal material. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification