DISPLAY DEVICE

• US 20110001912A1
• Filed: 02/20/2009
• Published: 01/06/2011
• Est. Priority Date: 02/22/2008
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ninomiya, Ikuo, Tsuda, Kazuhiko, Yamada, Nobuaki, Sakai, Akira
• Application Number:
  US12/735,855
• Publication Number:
  US 20110001912A1
• Time in Patent Office: Days
• US Class Current: 349/137
• CPC Class Codes: G02B 1/118 having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
• CPC Class Codes: G02F 1/1335 Structural association of cells with optical devices, e.g. polarisers or reflectors
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

A display device of at least one embodiment of the present invention includes a display panel; an optical plate placed on a viewer side of the display panel with the intervention of an air layer; and an antireflection layer placed on a viewer side of the optical plate, the antireflection layer having a motheye structure over its surface. The optical plate includes a plastic layer configured to transmit visible light, a quarter-wave layer placed on a viewer side of the plastic layer, and a polarizing layer placed on a viewer side of the quarter-wave layer, the polarizing layer being configured to transmit a linear polarization. The display device is more suitable to mobile applications than the conventional devices.

Claims

1. A display device, comprising:

a display panel;

an optical plate placed on a viewer side of the display panel with the intervention of an air layer; and

an antireflection layer placed on a viewer side of the optical plate, the antireflection layer having a motheye structure over its surface,

wherein the optical plate includes

a plastic layer configured to transmit visible light,

a quarter-wave layer placed on a viewer side of the plastic layer, and

a polarizing layer placed on a viewer side of the quarter-wave layer, the polarizing layer being configured to transmit a linear polarization.

2. The display device of claim 1, wherein the plastic layer is a half-wave layer.

3. The display device of claim 1, wherein

the plastic layer has an in-plane retardation, the in-plane retardation being not more than 40 nm, and

a slow axis of the plastic layer is generally perpendicular to or generally parallel to a transmission axis of the polarizing layer.

4. The display device of claim 1, wherein

the display panel is a liquid crystal display panel, and

the liquid crystal display panel does not have a polarizing layer on the optical plate side.

5. The display device of claim 1, further comprising a seal portion between the liquid crystal display panel and the optical plate, the seal portion having a hole which provides a communication between the air layer and outside air.

6. A display device, comprising:

a display panel;

a liquid crystal cell placed on a viewer side of the display panel, a retardation of the liquid crystal cell being variable within a range which includes a quarter wavelength of visible light;

a polarizing layer placed on a viewer side of the liquid crystal cell, the polarizing layer being configured to transmit a linear polarization; and

an antireflection layer placed on a viewer side of the polarizing layer, the antireflection layer having a motheye structure over its surface.

7. The display device of claim 6, wherein the liquid crystal cell has flexibility and is placed on the viewer side of the display panel with the intervention of an air layer.

8. The display device of claim 6, further comprising a half-wave layer between the display panel and the liquid crystal cell.