IP Library Granted Patent US 8,780,025
Granted Patent B2
US 8,780,025 · App. 12/008,822 · Granted Jul 15, 2014

Display device

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Quick Facts
Patent No.
US 8,780,025
App. No.
12/008,822
Granted
Jul 15, 2014
Kind
B2
Abstract

Light reflecting layers 45 a that totally reflect light are provided inside the subpixels 10 disposed in particular regions on an inner face of a TFT array substrate 4 , and light reflecting layers 45 b that scatter light are provided inside the subpixels 10 other than those. Thanks to this, the reflectance of the light reflecting layers 45 a can be rendered different from that of the light reflecting layers 45 b . As a result, differences can be created in the display light formed by the light reflecting layers 45 a and by the light reflecting layers 45 b , by means of the light that is reflected thereat. Thereby, fine adjustment of the display light brightness and contrast is enabled, so that a liquid crystal display device 1 with extensive power of expression and superior display characteristics is provided.

Claims (15)

1. A display device comprising:

a display area constituted of subpixels arranged in a matrix;

some of the subpixels comprising light-transmissive regions, and some of subpixels constituted only of light-reflective regions of light reflecting layers; and

patterns being displayed in the display area when the subpixels of the display device are in a non-driven state, through the use of light reflecting layers of at least two differing types in the subpixels constituted only of the light-reflective regions such that light reflectance properties for the two types of light reflecting layers are different from one another in a direction perpendicular to a plane of the display device, wherein

the subpixels include a first subpixel provided with a white or transparent color filter and a second subpixel provided with a color filter of any one of at least three colors of red, green and blue,

the first subpixel is constituted only of the light-reflective regions, and

the second subpixel comprises the light-transmissive region and the light-reflective regions.

2. The display device according to claim 1 , further comprising:

a first substrate and a second substrate that are disposed opposing each other, and

a liquid crystal layer that is sandwiched between the first substrate and the second substrate;

wherein, in the non-driven state, at least the light-reflective regions are in a normally white mode that is displayed as white.

3. A display device comprising:

a display area including a plurality of subpixels arranged in a matrix, the subpixels include first subpixels provided with a white or transparent color filter and second subpixels provided with a red, green or blue color filter,

wherein the second subpixels include a light-transmissive region and a light-reflective region, whereas the first subpixels only include a light-reflective region, and

wherein the first subpixels include light reflecting layers of at least two differing types that have different light reflectance properties in a direction perpendicular to a plane of the display device.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 11, 2025
From: JAPAN DISPLAY INC.
To: MAGNOLIA WHITE CORPORATION
Reel/Frame 072398/0001 →
MERGER AND CHANGE OF NAME Recorded Jul 24, 2025
From: JAPAN DISPLAY EAST INC.; JAPAN DISPLAY WEST INC.
To: JAPAN DISPLAY INC.
Reel/Frame 071935/0063 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 9, 2013
From: SONY CORPORATION
To: JAPAN DISPLAY WEST INC.
Reel/Frame 030182/0522 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 8, 2010
From: EPSON IMAGING DEVICES CORPORATION
To: SONY CORPORATION
Reel/Frame 024500/0239 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 14, 2008
From: UEHARA, TOSHINORI; KAMIJO, KIMITAKA; TAKIZAWA, KEIJI; NAKANO, TOMOYUKI; MARUYAMA, KUNIO; SUGIYAMA, HIROKI
To: EPSON IMAGING DEVICES CORPORATION
Reel/Frame 020406/0731 →