IP Library Granted Patent US 8,451,537
Granted Patent B2
US 8,451,537 · App. 12/774,145 · Granted May 28, 2013

Video viewing facility and self-luminous display

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Quick Facts
Patent No.
US 8,451,537
App. No.
12/774,145
Granted
May 28, 2013
Kind
B2
Abstract

A video viewing facility is provided. A circularly polarized light source is provided outside a self-luminous display. The self-luminous display includes a first wave plate having a function of converting circularly polarized light into linearly polarized light; a polarizing film; a second wave plate having a function of converting circularly polarized light into linearly polarized light; a circularly polarized light separating film; and a self-luminous panel, in this order from a visible side of the self-luminous display.

Claims (26)

1. A video viewing facility comprising:

a self-luminous display; and

a circularly polarized light source provided outside the self-luminous display,

wherein the self-luminous display includes in order from the circularly polarized light source:

a first wave plate having a function of converting circularly polarized light into linearly polarized light;

a polarizing film;

a second wave plate having a function of converting circularly polarized light into linearly polarized light;

a circularly polarized light separating film having a function of separating a display light emitted from a self-luminous panel into right circularly polarized light and left circularly polarized light, reflecting one of the right circularly polarized light and the left circularly polarized light and transmitting the other of the right circularly polarized light and the left circularly polarized light therethrough; and

the self-luminous panel,

wherein the first wave plate is arranged such that circularly polarized light emitted from the circularly polarized light source is converted into linearly polarized light by the first wave plate and then the linearly polarized light is absorbed in the polarizing film, and

wherein the second wave plate is arranged such that circularly polarized light passed through the circularly polarized light separating film is converted into linearly polarized light by the second wave plate and then the linearly polarized light passes through the polarizing film.

2. The video viewing facility as set forth in claim 1 , wherein each of the first and second wave plates is comprised of a λ/4 plate.

3. The video viewing facility as set forth in claim 1 ,

wherein the first wave plate is arranged such that a slow axis of the first wave plate is inclined with respect to an absorption axis of the polarizing film at an angle of 45±5 degrees or an angle of 135±5 degrees, and

wherein the second wave plate is arranged such that a slow axis of the second wave plate is inclined with respect to the absorption axis of the polarizing film at an angle of 45±5 degrees or an angle of 135±5 degrees.

4. A self-luminous display, comprising:

a first wave plate having a function of converting circularly polarized light into linearly polarized light;

a polarizing film;

a second wave plate having a function of converting circularly polarized light into linearly polarized light;

a circularly polarized light separating film having a function of separating a display light emitted from a self-luminous panel into right circularly polarized light and left circularly polarized light, reflecting one of the right circularly polarized light and the left circularly polarized light and transmitting the other of the right circularly polarized light and the left circularly polarized light therethrough; and

the self-luminous panel, in this order from a visible side of the self-luminous display,

wherein the first wave plate is arranged such that circularly polarized light emitted from a circularly polarized light source which is provided outside the self-luminous display is converted into linearly polarized light by the first wave plate and then the linearly polarized light is absorbed in the polarizing film, and

wherein the second wave plate is arranged such that circularly polarized light passed through the circularly polarized light separating film is converted into linearly polarized light by the second wave plate and then the linearly polarized light passes through the polarizing film.

5. The self-luminous display as set forth in claim 4 ,

wherein the first wave plate is arranged such that a slow axis of the first wave plate is inclined with respect to an absorption axis of the polarizing film at an angle of 45±5 degrees or an angle of 135±5 degrees, and

wherein the second wave plate is arranged such that a slow axis of the second wave plate is inclined with respect to the absorption axis of the polarizing film at an angle of 45±5 degrees or an angle of 135±5 degrees.

Assignments (2)
RELEASE OF SECURITY INTEREST Recorded Feb 21, 2025
From: JPMORGAN CHASE BANK, N.A.
To: GRAFTECH INTERNATIONAL HOLDINGS INC. (F/K/A AS UCAR CARBON COMPANY INC.)
Reel/Frame 070291/0686 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 10, 2010
From: YOSHIMI, HIROYUKI; TAKEDA, KENTAROU; TAKITA, TOMOHITO
To: NITTO DENKO CORPORATION
Reel/Frame 024360/0497 →