Display device

• US 20080284954A1
• Filed: 01/11/2008
• Published: 11/20/2008
• Est. Priority Date: 01/12/2007
• Status: Active Grant

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Epson Imaging Devices Corporation (Seiko Group)
• Inventors: Kamijo, Kimitaka, Takizawa, Keiji, Uehara, Toshinori, Nakano, Tomoyuki
• Granted Patent: US 7,936,423 B2
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133374 for displaying permanent signs or marks
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors

Abstract

A liquid crystal display device 1 has subpixels 10 having a light-transmissive region 10a and a light-reflective region 10b. A color filter layer 50 corresponding to an identification pattern 70 that it is desired to be displayed when the liquid crystal display device 1'"'"'s power is off is formed at the light-reflective regions lob, so that even when the liquid crystal display device 1 is in the non-driven state, incident external light emerges as outgoing light having the colors of the color layers corresponding to the identification pattern, and hence the identification pattern can be displayed. Thus, any desired pattern can be displayed in the liquid crystal display device'"'"'s non-driven state, so that a liquid crystal display device with extensive expression and superior display characteristics is provided.

Claims

1. A display device comprising:

a plurality of subpixels having light-reflective regions and light-transmissive regions; and

a display area constituted of the subpixels arranged in a matrix;

a color layer being formed corresponding to a pattern that is desired to be displayed in the display area when the display device is in a non-driven state in the light-reflective regions of the subpixels corresponding to the pattern.

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, at least the light-reflective regions of the subpixels corresponding to the pattern that is desired to be displayed in the display area are in a normally white mode that is displayed as white in the non-driven state.

3. The display device according to claim 1, wherein the color layer corresponding to the pattern is a hue composed of a red layer, a green layer, and a blue layer.