Browse Prior Art Database

Projection Display System which can use Linear Polarized Lights Efficiently

IP.com Disclosure Number: IPCOM000122958D
Original Publication Date: 1998-Jan-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 4 page(s) / 82K

Publishing Venue

IBM

Related People

Ono, M: AUTHOR

Abstract

Disclosed is a Liquid Crystal Display (LCD) projection display system and a special LCD panel used in this system. The LCD panel is a key device of this system. The display area of the LCD panel is divided into two parts which respectively use mutually perpendicular linear polarization components. The optical device of this system divides the light from the light source to mutually perpendicular linear polarization components and leads them to the LCD panel to use all linear polarization components of the light. Therefore, this system can use light from the light source efficiently.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 53% of the total text.

Projection Display System which can use Linear Polarized Lights Efficiently

      Disclosed is a Liquid Crystal Display (LCD) projection display
system and a special LCD panel used in this system.  The LCD panel is
a key device of this system.  The display area of the LCD panel is
divided into two parts which respectively use mutually perpendicular
linear polarization components.  The optical device of this system
divides the light from the light source to mutually perpendicular
linear polarization components and leads them to the LCD panel to use
all linear  polarization components of the light.  Therefore, this
system can use light from the light source efficiently.

      Fig. 1 shows the conceptual structure of the LCD
panel.  Polarizers (1) and (2) are divided into two parts whose
transmission axes are mutually perpendicular to each other.  The two
polarizers, (1) and (2), are placed to make the transmission axes of
their faced parts perpendicular to each other.  (3) and (4) are glass
plates with molecular alignment layers on them.  Two molecular
alignment layers are faced to each other.  The alignment direction on
the glass plate (3) is parallel to the transmission axis of one of
two parts of the polarizer (1).  The alignment direction on the glass
plate (4) is also parallel to the transmission axis of one of two
parts of the polarizer (2).  The alignment directions of the faced
two alignment layers are perpendicular to each other.  (5) are liquid...