Reflective morphable display device and method of feature activation
First Claim
1. A display comprising:
- a display device configured to transmit linearly polarized light in an on state and to absorb linearly polarized light in an off state;
a bi-stable cholesteric (ChLCD) layer configured to have a reflective state being a stable state, a lower transmissivity state being a stable state, and a high transmissivity state requiring power to maintain the high transmissivity state, the ChLCD layer being configured to reflect a circularly polarized light with a particular handedness in the reflective state;
a single quarter lambda layer positioned between the display and the cholesteric layer configured to change linearly polarized light to light being the circularly polarized light and to change the circularly polarized light transmitted to light being linearly polarized light.
4 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is reflective morphable display with multi-layered depth viewing, low power consumption and few components and a method of activating various features thereof. The disclosed display includes a bi-stable reflective cholesteric liquid display crystal (ChLCD) layered in combination with a display device such as an LCD and a quarter lambda (λ/4) retardation film layer. Linearly polarized light emerging from the front surface of a display device is circularly polarized by the λ/4 layer before entering the ChLCD layer. In its reflective state, the ChLCD layer receiving a portion of the ambient light having the same handedness of the ChLCD is reflected in a mirror-like manner. Also in its reflective state, when it receives light that is circularly polarized by the λ/4 retardation film layer, the ChLCD layer acts as a shutter. A display device with depth viewing is provided as the ChLCD layer pixelated so it is configured to display font and/or other indicia.
7 Citations
20 Claims
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1. A display comprising:
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a display device configured to transmit linearly polarized light in an on state and to absorb linearly polarized light in an off state; a bi-stable cholesteric (ChLCD) layer configured to have a reflective state being a stable state, a lower transmissivity state being a stable state, and a high transmissivity state requiring power to maintain the high transmissivity state, the ChLCD layer being configured to reflect a circularly polarized light with a particular handedness in the reflective state; a single quarter lambda layer positioned between the display and the cholesteric layer configured to change linearly polarized light to light being the circularly polarized light and to change the circularly polarized light transmitted to light being linearly polarized light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display comprising:
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a keypad element; a bi-stable cholesteric layer configured to have a reflective state being a stable state, a lower transmissivity state being a stable state and a high transmissivity state requiring power to maintain the high transmissivity state and configured to reflect a circularly polarized light with a particular handedness in the reflective state; a single quarter lambda layer positioned between the keypad element and the cholesteric layer configured to change linearly polarized light transmitted from the keypad element to light being the circularly polarized light and to change the circularly polarized light transmitted from the cholesteric layer to linearly polarized light; and an absorptive polarizer layer configured to absorb a particular linear light positioned between the keypad element and the a single quarter lambda layer. - View Dependent Claims (12, 13)
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14. A method of display including a display device configured to transmit linearly polarized light in an on state and to absorb linearly polarized light in an off state, the method comprising:
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activating a bi-stable cholesteric layer configured to have a reflective state being a stable state, a lower transmissivity state being a stable state and a high transmissivity state requiring power to maintain the high transmissivity state and configured to reflect a circularly polarized light with a particular handedness in the reflective state, wherein activating the cholesteric layer changes the state of the cholesteric layer so that it is one of a reflective state, a high transmissivity state and a lower transmissivity state; transmitting light through a single quarter lambda layer positioned between the display and the cholesteric layer, the single quarter lambda layer being configured to change linearly polarized light to the circularly polarized light and to change the circularly polarized light to linearly polarized light. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification