Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1991-09-10
1995-08-22
Nguyen, Vinh P.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324753, 324770, G01R 1900
Patent
active
054443857
ABSTRACT:
A display panel testing apparatus, for observing large areas of a test panel, including an electro-optical element having optical properties that change to form images when an electric field is impressed thereon. The electro-optical element has a first surface facing a test panel that forms the electric field. The first surface and the test panel having a gap therebetween. The display panel testing apparatus also includes a light receptor for receiving the images from the electro-optical element and in particular a second surface of the electro-optical element. The display panel testing apparatus further includes a movable stage and movable mirrors coupled to the movable stage. The movable mirrors are adjustable to direct desired portions of the images onto the light receptor from desired positions of the electro-optical element. The movable stage also allows the movable mirrors to be positioned over the desired portions of the electro-optical element to receive the images portions therefrom.
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Nguyen Vinh P.
Photon Dynamics, Inc.
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