LIQUID CRYSTAL DISPLAY DEVICE

Abstract: a liquid crystal display device includes a liquid crystal display panel including a display region, a backlight unit located behind the liquid crystal panel and including layered optical sheets, a light source of non-visible light disposed inside or behind the backlight unit, a diffusion structural unit located in front of the light source and configured to diffuse non-visible light from the light source, and a lens unit configured to condense light that is diffused by the diffusion structural unit, hits an object and is reflected off the object onto a sensor. the optical sheets include a diffusion sheet. the diffusion structural unit is smaller in size than the display region and selectively disposed at a location to be irradiated with non-visible light from the light source. at least one of the optical sheets is interposed between the diffusion structural unit and the light source.

Inventor(s): Katsuhiro ITO

CPC Classification: G02F1/133624 ({providing polarized light, e.g. by converting a polarisation component into another one})

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