Illumination optical system for liquid crystal display

Details Illumination optical system for liquid crystal display Illumination optical system for liquid crystal display

1998-03-26

2000-04-11

Patel, Nimeshkumar D.

Illumination

Light source and modifier

Plural serial lens elements or components

362298, F21V 2900

Patent

active

060480793

ABSTRACT:
In front of a reflector, a polarizing beam splitter section for transmitting therethrough one of P- and S-polarized light components of light from a light-emitting body and reflecting the other, and a half-wave optical phase plate covering half the area of an aperture portion of the reflector are disposed, whereby the number of times light passes through an optical phase plate used for converting the light from a light source section into polarized light is reduced, thus decreasing loss in light quantity in the optical phase plate. An S-polarized light component reflected by a polarizing beam splitter 3 toward a reflector 2 is converted into a P-polarized light component so as to be made incident on the polarizing beam splitter 3 again, whereby this light component can also be transmitted through the polarizing beam splitter 3 so as to be made incident on liquid crystal display panels 23B, 23G, and 23R.

REFERENCES:
patent: 5555186 (1996-09-01), Shioya

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