Patent ID: 7180234
Filing Date: 2007-02-20
Classification: H01J

Abstract:
1. A field emission display device comprising: a cathode substrate with a cathode electrode formed thereon; an electron emission material layer formed on said cathode electrode; a control electrode located at the front of said electron emission material layer and formed with at least one opening opposed to said electron emission material layer; an anode substrate with an anode electrode and a phosphor formed thereon, said anode substrate being located at the front of said control electrode; and a shield electrode located between said control electrode and said anode electrode and formed with an electron pass aperture through which an electron beam flowing from said electron emission material layer via said opening of said control electrode to said phosphor passes, wherein an opening dimension in a predetermined direction of said opening of said control electrode is greater than an opening dimension in said predetermined direction of said electron pass aperture of said shield electrode, and said shield electrode is located at the front of said control electrode so that the entire range of said opening dimension in said predetermined direction of said electron pass aperture of said shield electrode is within the range of said opening dimension in said predetermined direction of said opening of said control electrode, and wherein said electron pass aperture of said shield electrode has a substantially rectangular shape, and said opening of said control electrode has a substantially rectangular shape intersecting said electron pass aperture of said shield electrode.