Liquid crystal display device with photosensor and method of...

Details Liquid crystal display device with photosensor and method of... Liquid crystal display device with photosensor and method of...

2010-07-08

2011-10-25

Nguyen, Hoan C (Department: 2871)

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

C349S042000, C349S047000, C345S092000, C257S059000, C257S072000

Reexamination Certificate

active

08045081

ABSTRACT:
A liquid crystal display device comprises a liquid crystal panel including first and second substrates bonded to each other with a liquid crystal layer positioned therebetween, and the photosensor, formed on the second substrate, for sensing an external light from the surroundings, wherein the photosensor includes a semiconductor layer formed on the second substrate and provided with n+-type ion implantation region, ion non-implantation region and lightly doped region; an insulation film, formed on the second substrate, for covering the semiconductor layer; a passivation film, formed on the second substrate, for covering the insulation film; a first contact hole passing through the insulation film and the passivation film, to expose source and drain regions of the semiconductor layer; source and drain electrodes connected with the source and drain regions of the semiconductor layer through the first contact hole; an ion implanting prevention film formed on the insulation film and overlapped with the ion non-implantation region; and a second contact hole passing through the passivation film and the ion implanting prevention film above the ion non-implantation region, so as to provide the external light to the ion non-implantation region.

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