Apparatus for inspecting on-off states of a scattering-type liqu

Details Apparatus for inspecting on-off states of a scattering-type liqu Apparatus for inspecting on-off states of a scattering-type liqu

1994-09-20

1995-10-17

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 54, 359 36, 359 62, 324770, G02F 11335, G02F 11343

Patent

active

054595940

ABSTRACT:
An apparatus for ON-OFF inspection on a scattering-type liquid crystal display panel is provided which is of decreased size and is capable of easily inspecting the ON-OFF states of the liquid crystal display panel by assuring enhanced visuality of an image displayed for inspection. The inspection apparatus includes: support means for supporting the liquid crystal display panel; signal applying means for applying an electric signal to a pixel of the liquid crystal display panel; illumination means for illuminating the liquid crystal display panel, the illumination means comprising a flat photoconductive member and a light source mounted on a side wall of the photoconductive member; a light-absorptive layer disposed on one side of the photoconductive member with a gap therebetween; and means for making the other side of the photoconductive member come into close contact with the liquid crystal display panel.

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