Liquid crystal display

• US 7,834,962 B2
• Filed: 12/08/2008
• Issued: 11/16/2010
• Est. Priority Date: 12/19/2007
• Status: Active Grant

• Current Assignee: Trivale Technologies, LLC (Vector Capital Corporation)
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Nakagawa, Naoki, Satake, Tetsuya, Ono, Takeshi, Okumura, Takanori, Nagae, Suguru, Yamagata, Yusuke, Nakahata, Takumi
• Primary Examiner(s): Ullah; Akm E
• Application Number:
  US12/330,105
• Publication Number:
  US 20090161048A1
• Time in Patent Office: 708 Days
• Field of Search: 349/56, 349/58, 349/110, 349/159, 349/160
• US Class Current: 349/110
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133354 Arrangements for aligning or assembling substrates
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence

Abstract

In a liquid crystal display (10) having a curved display surface, long sides of pixel structures (11) are arranged along the curve direction (Y) of the display surface and on a side of counter substrate provided is a black matrix having a black matrix opening (41a) whose length in the curve direction (Y) is not longer than E−L {(T1/2)+(T2/2)+d}/R, assuming that the length of the display surface in the curve direction (Y) is L, the thickness of an array substrate is T1, the thickness of the counter substrate is T2, the size of the gap between the array substrate and the counter substrate is d, the radius of curvature of the curved display surface is R and the length of a long side of a pixel electrode (29) provided in each of the pixel structures (11) is E. It thereby becomes possible to suppress display unevenness resulting from positional misalignment of the two substrates due to curvature and provide a liquid crystal display achieving a high-quality display image.

Claims

1. A liquid crystal display comprising:

an array substrate having a plurality of rectangular pixel structures which are arranged in matrix;

a counter substrate opposed to said array substrate, having a color filter and a black matrix; and

a liquid crystal layer held between said array substrate and said counter substrate,

said liquid crystal display having a curved display surface formed of said array substrate and said counter substrate both being curved,

wherein long sides of said pixel structures are arranged along a curve direction of said display surface,

a rectangular pixel electrode is provided in each of said pixel structures, with its long side being arranged along the long side of the pixel structure, and

assuming that the length of said display surface in said curve direction is L, the thickness of said array substrate is T1, the thickness of said counter substrate is T2, the size of a gap between said array substrate and said counter substrate is d, the radius of curvature of the curved display surface is R and the length of the long side of the pixel electrode provided in each of said pixel structures is E, the length of an opening sectioned by said black matrix in said curve direction is not longer than E−

L {(T1/2)+(T2/2)+d}/R.

3. The liquid crystal display according to claim 1, wherein

said liquid crystal layer is in a twisted nematic mode of 6 o'"'"'clock viewing angle or 12 o'"'"'clock viewing angle toward said display surface, and said curve direction is a horizontal direction of said display surface.

5. The liquid crystal display according to claim 1, wherein

a signal wire is disposed along said curve direction and a scanning wire and a common wire are disposed in a direction orthogonal to said curve direction.

2. A liquid crystal display comprising:

an array substrate having a plurality of rectangular pixel structures which are arranged in matrix;

a counter substrate opposed to said array substrate, having a color filter and a black matrix; and

a liquid crystal layer held between said array substrate and said counter substrate,

said liquid crystal display having a curved display surface formed of said array substrate and said counter substrate both being curved,

wherein long sides of said pixel structures are arranged along a curve direction of said display surface, and

assuming that the length of said display surface in said curve direction is L, the thickness of said array substrate is T1, the thickness of said counter substrate is T2, the size of a gap between said array substrate and said counter substrate is d, the radius of curvature of the curved display surface is R and the length of the long side of each of said pixel structures is P, the length of an opening sectioned by said black matrix in said curve direction is not longer than P−

L {(T1/2)+(T2/2)+d}/R.

4. The liquid crystal display according to claim 2, wherein

said liquid crystal layer is in a twisted nematic mode of 6 o'"'"'clock viewing angle or 12 o'"'"'clock viewing angle toward said display surface, and said curve direction is a horizontal direction of said display surface.

6. The liquid crystal display according to claim 2, wherein

a signal wire is disposed along said curve direction and a scanning wire and a common wire are disposed in a direction orthogonal to said curve direction.