Electrode arrangement for testing electroluminescent display

H - Electricity – 05 – B

Patent

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H05B 33/12 (2006.01) G09G 3/30 (2006.01)

Patent

CA 2539589

An apparatus for improving testability of electroluminescent displays (ELDs) is provided, incorporating at least two sets of electrodes, one set for connecting rows of pixels, and a second set for connecting columns of pixels, wherein at least one electrode set is interleaved in two subsets. The first subset has electrode extensions of a first length, and the second subset has electrode extensions of a second, shorter, length. A first connector is disposed generally in a direction perpendicular to the electrode extensions of both subsets and in electrical contact with the electrode extensions of the second subset. A second connector is disposed generally in a direction perpendicular to the electrode extensions of the first subset, and in electrical contact with the electrode extensions of only the first subset. A set of insulating patches separate the electrode extensions of the first subset from the first connector. The apparatus of the present invention restricts overvoltage during connection/disconnection of test apparatus.

L'invention concerne un appareil permettant d'améliorer la capacité de test d'écrans électroluminescents présentant au moins deux ensembles d'électrodes, un ensemble permettant de connecter des rangées de pixels et un second ensemble permettant de connecter des colonnes de pixels, au moins un ensemble d'électrodes étant entrelacé en deux sous-ensembles. Le premier sous-ensemble présente des extensions d'électrodes d'une première longueur et le second sous-ensemble présente des extensions d'électrodes d'une seconde longueur plus courte. Un premier connecteur se trouve normalement dans le sens perpendiculaire aux extensions d'électrodes des deux sous-ensembles et en contact électrique avec les extensions d'électrodes du second sous-ensemble. Un second connecteur se trouve normalement dans le sens perpendiculaire aux extensions d'électrode du premier sous-ensemble et en contact électrique avec des extensions d'électrodes du premier sous-ensemble uniquement. Un ensemble de raccordements isolants sépare les extensions d'électrodes du premier sous-ensemble et du premier connecteur. L'appareil de cette invention limite la surtension pendant la connexion/déconnexion de l'appareil de test.

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