US 9,804,438 B2Granted

Liquid crystal display device

AssigneeMitsubishi Electric Corporation

InventorsKoji Yonemura, Manabu Iwakawa, Akimasa Yuki, Toshiaki Fujino, Tetsuya Satake, Taroh Yoshino, Kazunori Okumoto

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Abstract

Liquid crystal molecules have a pretilt angle to the left-and-right direction in a plane perpendicular to the up-and-down direction, so that an end part of a first side as one side of a left side and a right side of the liquid crystal molecules is set closer to a backlight than an end part of a second side as the other side. Second edge parts of a black matrix adjacent to an upper side and a lower side of an opening have a straight line shape extending by inclination to mutually the same side in the left-and-right direction, so that an end part of the same side as a first side as one side of the left side and the right side of the second edge parts is positioned above the end part of the same side as the second side as the other side.

Claims9

Dependent claims

A liquid crystal display device comprising:

a light source of which a light distribution characteristic in a left-and-right direction is wider than a light distribution characteristic in an up-and-down direction;
and
a liquid crystal panel in an IPS (In-Plane Switching) mode or an FFS (Fringe Field Switching) mode in which light from said light source is capable of passing,
said liquid crystal panel including:
a liquid crystal cell which includes a first transparent substrate, a second transparent substrate arranged between said first transparent substrate and said light source, liquid crystal molecules sandwiched between the substrates, and a black matrix having an opening through which light from said light source is capable of passing;
a polarizer which is arranged on said light source side with respect to said liquid crystal cell and in which an absorption axis is aligned in said up-and-down direction;
an analyzer which is arranged on a side opposite to said light source with respect to said liquid crystal cell and in which an absorption axis is aligned in said left-and-right direction;
and
a biaxial retardation film which is arranged between said polarizer and said liquid crystal cell,
wherein
said liquid crystal molecules have a pretilt angle to said left-and-right direction in a plane perpendicular to said up-and-down direction, so that an end part of a first side as one side of a left side and a right side of said liquid crystal molecules viewed from said analyzer side is set closer to said light source than an end part of a second side as the other side,
first edge parts of said black matrix adjacent to a left side and a right side of said opening have a straight line shape extending in said up-and-down direction, and
second edge parts of said black matrix adjacent to the upper side and the lower side of said opening have a straight line shape extending by inclination to mutually the same side with respect to said left-and-right direction, so that an end part of said first side of said second edge parts viewed from said analyzer is positioned above an end part of said second side.

10 more elements

A liquid crystal display device comprising:

a light source;
and
a liquid crystal panel in an IPS (In-Plane Switching) mode or an FFS (Fringe Field Switching) mode in which light from said light source is capable of passing,
said liquid crystal panel including:
a liquid crystal cell which includes a first transparent substrate, a second transparent substrate arranged between said first transparent substrate and said light source, liquid crystal molecules sandwiched between the substrates, and a black matrix having an opening through which light from said light source is capable of passing;
a polarizer which is arranged on said light source side with respect to said liquid crystal cell and in which an absorption axis is aligned in an up-and-down direction;
an analyzer which is arranged on a side opposite to said light source with respect to said liquid crystal cell and in which an absorption axis is aligned in a left-and-right direction;
and
a biaxial retardation film which is arranged between said polarizer and said liquid crystal cell,
wherein
said opening of said black matrix has a longitudinal rectangular shape which is long in said up-and-down direction,
said liquid crystal cell further includes at least one of a pixel electrode and a common electrode each having a plurality of belt-shaped portions extending to said up-and-down direction by inclination at an angle of 5 degrees or above and 10 degrees or below,
said liquid crystal molecules are negative liquid crystals, and
said liquid crystal cell further includes:
a transmittance distribution region and a refractive index distribution region that cover said opening, said transmittance distribution region and said refractive index distribution region having respective distributions that are uniform in said left-and-right direction and different in said up-and-down direction.

12 more elements

A liquid crystal display device comprising:

a light source of which a light distribution characteristic in a left-and-right direction is wider than a light distribution characteristic in an up-and-down direction;
and
a liquid crystal panel in an IPS (In-Plane Switching) mode or an FFS (Fringe Field Switching) mode in which light from said light source is capable of passing,
the liquid crystal panel including:
a liquid crystal cell which includes a first transparent substrate, a second transparent substrate arranged between said first transparent substrate and said light source, and liquid crystal molecules sandwiched between the substrates;
a polarizer which is arranged on said light source side with respect to said liquid crystal cell and in which an absorption axis is aligned in an up-and-down direction;
an analyzer which is arranged on a side opposite to said light source with respect to said liquid crystal cell and in which an absorption axis is aligned in a left-and-right direction;
and
a biaxial retardation film which is arranged between said polarizer and said liquid crystal cell,
wherein
said liquid crystal cell further includes at least one of a pixel electrode and a common electrode each having a plurality of belt-shaped portions extending to said left-and-right direction by inclination at an angle of 5 degrees or above and 10 degrees or below,
said liquid crystal molecules are negative liquid crystals, and
said liquid crystal cell further includes:
a black matrix having an opening through which light from said light source is capable of passing;
and
a transmittance distribution region and a refractive index distribution region that cover said opening, said transmittance distribution region and said refractive index distribution region having respective distributions that are uniform in said up-and-down direction and different in said left-and-right direction.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/009,857Filed 29 Jan 2016
Priority: JP 2015-0192953 Feb 2015
Published: US 2016/0223875 A14 Aug 2016
Granted: 31 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G02F 1/133528
Structural association of cells with optical devices, e.g. polarisers or reflectors: polarisers
G02F 1/1337
Constructional arrangements; Manufacturing methods: surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
G02F 1/134363
Characterised by their geometrical arrangement: for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
G02F 1/133749
Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers: for low pretilt angles, i.e. lower than 15 degrees