Recent display research has produced high quality flat panel displays by combining liquid crystal technology with arrays of thin film transistors (TFT's). The present high cost of these displays can be reduced by integrating the scanning electronics onto the glass plate along with the pixel switching transistors. This paper describes a 320000 pixel self-scanned liquid crystal display (LCD) with CMOS-TFT gray-scale generators. Its 'chip size' of over 100 x 200 mm makes this the largest wafer scale integrated circuit ever built and the integration of the scanning circuitry on the plate has reduced the number of input leads from 1200 to 44. This dramatically illustrates the potential of wafer scale integration techniques to improve reliability & reduce cost. Since this display IC is too large to fit within the field of even a 2:1 wafer stepper, the design was first preassembled on a CAD workstation and then pratitioned into 16 smaller reticle segments. These segments were written onto a 7 1/4 inch reticle and the final assembly of the display was then completed by proper programming of a large area wafer stepper.


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    Title :

    An avionic gray-scale color head down display


    Additional title:

    Eine avionische große Farbanzeige mit Grauskala


    Contributors:
    Jose, D.L. (author) / Lee, S.N. (author) / Stewart, R.G. (author) / Ipri, A.C. (author) / Lipp, S.A. (author)


    Publication date :

    1990


    Size :

    7 Seiten, 5 Bilder, 3 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Avionic gray-scale color head-down display

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