Mirror display device and manufacturing method thereof

• US 9,459,491 B2
• Filed: 08/12/2014
• Issued: 10/04/2016
• Est. Priority Date: 02/10/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Yi, Jung Hwan
• Primary Examiner(s): Santiago, Mariceli
• Application Number:
  US14/457,775
• Publication Number:
  US 20150227001A1
• Time in Patent Office: 784 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133377 Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel
• CPC Class Codes: G02F 1/133536 Reflective polarizers G02F1/13362 takes precedence
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/13471 in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells G02F1/13475 takes precedence

Abstract

A display device includes a display panel and a polarization conversion panel facing the display panel. The polarization conversion panel includes: an insulation substrate; an absorptive polarizer positioned on the insulation substrate; a first electrode positioned on the absorptive polarizer; a passivation layer formed on the first electrode while being spaced apart therefrom a microcavity interposed between the passivation layer and the first electrode, the passivation layer an injection hole; an overcoat formed on the passivation layer to cover the injection hole and seal the microcavity; a second electrode positioned on the overcoat; a reflective polarizer positioned on the second electrode; and a liquid crystal layer positioned in the microcavity.

Claims

1. A display device comprising:

a display panel; and

a polarization conversion panel facing the display panel, wherein

the polarization conversion panel includes;

an insulation substrate;

an absorptive polarizer positioned on the insulation substrate;

a first electrode positioned on the absorptive polarizer;

a passivation layer formed on the first electrode while being spaced apart therefrom and a microcavity interposed between the passivation layer and the first electrode, the passivation layer including an injection hole;

an overcoat formed on the passivation layer to cover the injection hole and seal the microcavity;

a second electrode positioned on the overcoat;

a reflective polarizer positioned on the second electrode; and

a liquid crystal layer positioned in the microcavity.

2. The display device of claim 1, wherein

the display panel contacts the reflective polarizer.

3. The display device of claim 1, wherein

the first and second electrodes are made of a transparent conductive oxide (TCO).

4. The display device of claim 1, wherein

a first polarizer positioned between the display panel and the reflective polarizer is further included, and

transmissive axes of the first polarizer and the reflective polarizer coincide with each other.

5. The display device of claim 4, wherein

the transmissive axis of the reflective polarizer is perpendicular to a transmissive axis of the absorptive polarizer.

6. The display device of claim 4, wherein

a reflective axis of the reflective polarizer is parallel to the transmissive axis of the absorptive polarizer.

7. The display device of claim 4, wherein

the transmissive and reflective axes of the reflective polarizer are perpendicular to each other.

8. The display device of claim 1, wherein

the display panel includes:

a substrate including a plurality of pixel areas that are arranged in a matrix form including a plurality of pixel rows and pixel columns;

a thin film transistor formed on the substrate;

a pixel electrode formed in the pixel area while being connected to the thin film transistor;

a roof layer formed on the pixel electrode while being spaced apart therefrom and interposing a display microcavity therebetween;

a liquid crystal layer filling the display microcavity; and

an overcoat formed on the roof layer to cover the first injection hole and seal the display microcavity.