Lighting device and liquid crystal display using it

Details Lighting device and liquid crystal display using it Lighting device and liquid crystal display using it

2007-01-09

2010-11-09

Dudek, James A (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C349S066000

Reexamination Certificate

active

07830474

ABSTRACT:
A lighting device for emitting light in a planar manner comprises a backlight section having non-uniformity in light emission in a plane and an optical film having an in-plane transmittance distribution compensating for the non-uniformity in light emission. The optical film has a plurality of slits allowing light to pass through and controls the in-plane transmittance distribution by varying the shapes of slit openings. Widths of the slits are fixed, closed portions are provided in a longitudinal direction, and the in-plane transmittance distribution is controlled by the ratio of the closed portions to the slits. A part of the optical film other than the slits is a light shielding layer, and a surface on the light source side of the light shielding layer scatters and reflects light. Each value in the in-plane transmittance distribution of the optical film is smaller than the reciprocal of a corresponding value in a light intensity distribution of the backlight section. A surface opposite to a surface on the light source side of the optical film has a cylindrical lens structure focused on the slits. Non-uniformity in light emission in the lighting device such as a backlight used in a liquid crystal display is eliminated at a low cost.

REFERENCES:
patent: 5029986 (1991-07-01), De Vaan
patent: 7438429 (2008-10-01), Matsushita
patent: 2003/0063233 (2003-04-01), Takagi
patent: 08-122782 (1996-05-01), None
patent: 08-201803 (1996-08-01), None
patent: 09-236803 (1997-09-01), None
patent: 10-241434 (1998-09-01), None
patent: 2000-171614 (2000-06-01), None
patent: 2001-133782 (2001-05-01), None
patent: 2001-235741 (2001-08-01), None
patent: 2001-318614 (2001-11-01), None
patent: 2002-182208 (2002-06-01), None
patent: 2003-279979 (2003-10-01), None
patent: 2004-152515 (2004-05-01), None
patent: 2004-191675 (2004-07-01), None
patent: 2004-279864 (2004-10-01), None
patent: 2005-043907 (2005-02-01), None
patent: 2005-122121 (2005-05-01), None
patent: 2005-128561 (2005-05-01), None
patent: 2005-208425 (2005-08-01), None
patent: 2005-221619 (2005-08-01), None
patent: 2005-321693 (2005-11-01), None
patent: 2005-331804 (2005-12-01), None
patent: 2005-339881 (2005-12-01), None

Affiliated with

Also associated with

Rating

Lighting device and liquid crystal display using it does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lighting device and liquid crystal display using it, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lighting device and liquid crystal display using it will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4160810