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Patent Searching and Data


Title:
LIQUID CRYSTAL DISPLAY DEVICE AND PROJECTION TYPE DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2009086000
Kind Code:
A
Abstract:

To provide a liquid crystal display device using a vertical alignment liquid crystal, wherein an image can be displayed with high contrast even when a wavelength plate for phase compensation to compensate an A component is not used, by setting alignment conditions of four-layered liquid crystals to be in predetermined ranges.

In respective liquid crystal layers 13a-13d, base lines which are straight lines existing in directions parallel to respective flat surfaces of incident side and outgoing side substrates, between each of which the liquid crystal layer is interposed, and each of which existing in an angular range of (+5)-(-5) centered in a direction forming an angle of 45 with a vibrational direction of polarized light incident on the incident side substrate, are oriented to directions mutually different from one another by a unit of 90. Furthermore, when each of and is defined to be 0 or a positive number satisfying +10, an aligning direction of a liquid crystal in the incident side is set to a direction forming an angle of (/2) with the base line toward either of rotational directions, and that in the outgoing side is set to a direction forming an angle of (/2) with the base line toward another rotational direction opposite to the rotational direction, respectively.


Inventors:
MATSUMARU MASAHIRO
Application Number:
JP2007251922A
Publication Date:
April 23, 2009
Filing Date:
September 27, 2007
Export Citation:
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Assignee:
VICTOR COMPANY OF JAPAN
International Classes:
G02F1/1347; G02F1/13357; G02F1/13363; G02F1/1337; G02F1/139
Attorney, Agent or Firm:
Kaneyuki Matsuura