OPTICAL UNIT, BACKLIGHT DEVICE, LIQUID CRYSTAL MODULE AND LIQUID CRYSTAL DISPLAY

Japanese Patent JP2010217660

A

To provide an optical sheet for liquid crystal display, the optical sheet preventing the deterioration of luminance and reducing luminance unevenness without increasing the number of light sources.

The optical unit includes, on an optical path of light emitted from the light source: a diffusion plate 6 having a plate-like prism that includes a function of diffusing incident light; and an optical sheet 7 having a first micro lens, wherein the optical sheet includes a plurality of micro lenses having a near-hemisphere or a near-semi-ellipsoid on a light-emitting side. The diffusion plate 6 having the prism includes a light-diffusion part, a first prism part and a second prism part. The first prism part includes: a sawtooth cross-section formed on one surface facing the light source of the light diffusion part; and an apex angle facing the direction to the light source. The second prism part includes: a sawtooth cross-section formed on the other surface of the light diffusion part; and an apex angle facing a direction opposite to the apical angle of the first projection prism.

JPH11288035	DISPLAY
JP7226917	Light diffusing optical element with clad containing scattering centers
JP4700501	Optical element and its manufacturing method

YAMAGISHI NOBUYOSHI
MASUCHI SHIGEHIRO
HIROHATA NAOTO

JP2009065855A

September 30, 2010

March 18, 2009

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VICTOR COMPANY OF JAPAN

G02B5/02; F21S2/00; F21V3/00; G02B3/00; G02B5/30; G02F1/13357; F21Y103/00

JP2008145550A	2008-06-26
JP2008139850A	2008-06-19
JP2008139869A	2008-06-19
JPH09211453A	1997-08-15
JP2009086031A	2009-04-23
JP2008117639A	2008-05-22

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