Mirror display

• US 10,180,594 B2
• Filed: 04/21/2015
• Issued: 01/15/2019
• Est. Priority Date: 04/28/2014
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Hakoi, Hiroyuki, Hasegawa, Masahiro, Sakai, Akira, Minoura, Kiyoshi
• Primary Examiner(s): Davison, Angela K
• Application Number:
  US15/306,791
• Publication Number:
  US 20170059935A1
• Time in Patent Office: 1,365 Days
• CPC Class Codes: G02B 5/3033 in the form of a thin sheet or foil, e.g. Polaroid
• CPC Class Codes: G02B 5/3041 comprising multiple thin layers, e.g. multilayer stacks
• CPC Class Codes: G02B 7/008 with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
• CPC Class Codes: G02F 1/133536 Reflective polarizers G02F1/13362 takes precedence
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 1/133557 Half-mirrors
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist
• CPC Class Codes: G02F 2203/09 transflective
• CPC Class Codes: G09F 9/35 being liquid crystals G09F9/302 takes precedence; liquid crystal materials C09K19/00; liquid crystal panels comprising a number of electrodes in a single cell per se G02F1/13

Abstract

The present invention provides a mirror display that can suppress warp of a half mirror plate with a reflective polarizer under heat to prevent distortion of a reflected image in a mirror mode. The mirror display of the present invention includes a half mirror plate that includes a first reflective polarizer and a first base material, a display device, and a warp-suppressing member that suppresses shrinking of the first reflective polarizer under heat. The first reflective polarizer and the first base material are integrated, and the display device is disposed on the back surface side of the half mirror plate.

Claims

1. A mirror display comprising:

a half mirror plate that includes a first reflective polarizer and a first base material;

a liquid crystal display device that includes a liquid crystal display panel; and

a warp-suppressing member that suppresses shrinking of the first reflective polarizer under heat,

the first reflective polarizer and the first base material being integrated,

the liquid crystal display panel including, in order from a back surface side toward a viewing surface side, a first absorptive polarizer, a liquid crystal layer, and a second absorptive polarizer,

the liquid crystal display device being disposed on the back surface side of the half mirror plate,

a transmission axis of the first reflective polarizer and a transmission axis of the second absorptive polarizer being parallel to each other, and

the warp-suppressing member being disposed closer to the viewing surface side than to the first reflective polarizer.

2. The mirror display according to claim 1,

wherein the warp-suppressing member includes a heat-shrinkable member that shrinks under heat, and

the heat-shrinkable member is bonded to the first base material on a side opposite to the first reflective polarizer.

3. The mirror display according to claim 2,

wherein a first direction and a second direction are substantially parallel to each other, where the first direction is one of a machine direction and a transverse direction of the first reflective polarizer with a higher heat shrinkage, and the second direction is one of a machine direction and a transverse direction of the heat-shrinkable member with a higher heat shrinkage.

4. The mirror display according to claim 3,

wherein the heat shrinkage of the heat-shrinkable member in the second direction is equal to or lower than the heat shrinkage of the first reflective polarizer in the first direction.

5. The mirror display according to claim 1,

wherein the warp-suppressing member includes a second reflective polarizer, and

the second reflective polarizer is bonded to the first base material on the side opposite to the first reflective polarizer.

6. The mirror display according to claim 5,

wherein the first reflective polarizer is made of the same material and has the same thickness as the second reflective polarizer.

7. The mirror display according to claim 5,

wherein the first reflective polarizer has a machine direction substantially parallel to a machine direction of the second reflective polarizer.

8. The mirror display according to claim 5,

wherein an angle defined by a reflection axis of the first reflective polarizer and a reflection axis of the second reflective polarizer is 0°

.