Optimisation of very small pitch active matrix LCD for projection

Author

Vignolle, J.M. ; Meysen, C. ; Hepp, B. ; Mourey, B. ; Castleberry, D.E.

Author_Institution

Thompson LCD, Moirans, France

fYear

1991

fDate

15-17 Oct. 1991

Firstpage

223

Lastpage

226

Abstract

AM LCDs (liquid crystal displays) with <100- mu m pitches are capable of EDTV/HDTV (enhanced-definition/high-definition TV) projection, but these pitches imply electrical parasitic effects and small aperture ratio. A structure combining a storage capacitor and a black matrix with an 85- mu m pitch is evaluated and experimental results are presented. It is shown that the ground-plane-type storage capacitor is very efficient for designing low-pitch AM LCDs for projection since it reduces the many couplings of the cell. Moreover, a black matrix can easily be designed on that ground plane, which helps to keep a high OAR (open aperture ratio): a 85- mu m-pitch cell with a >60% OAR has been achieved thanks to this design.<>

Keywords

capacitor storage; high definition television; liquid crystal displays; optimisation; EDTV/HDTV; active matrix LCD; black matrix; couplings; enhanced definition TV; high definition TV; open aperture ratio; projection; storage capacitor; Active matrix liquid crystal displays; Apertures; Capacitors; Crosstalk; Delay effects; Delay lines; Electrodes; HDTV; Rivers; Thin film transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Display Research Conference, 1991., Conference Record of the 1991 International

Conference_Location

San Diego, CA, USA

Print_ISBN

0-7803-0213-3

Type

conf

DOI

10.1109/DISPL.1991.167475

Filename

167475