Display device and electronic device having the same
First Claim
Patent Images
1. A display device comprising:
- a display unit adapted to allow a first polarized light to be emitted as display light; and
a control unit adapted to control the display unit, wherein the display unit has a polarized light selecting unit on a viewing side thereof, the polarized light selecting unit transmits the first polarized light and reflects a second polarized light having a polarization axis crossing a polarization axis of the first polarized light, and the control unit switches between a display mode, in which the first polarized light is emitted from the display unit as display light, and a mirror mode, in which the first polarized light is not emitted from the display unit.
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Abstract
In a display device 100, a reflective polarizer 110, a polarizer 120, a retarder 130, a liquid crystal panel 140, a polarizer 150, and a backlight 160 are disposed sequentially from the viewing side. When the liquid crystal panel 140 is set in a light blocking state or the backlight 160 is set in an unlit state, the reflection of an outside light “O” turns the display screen into a mirror state. When the backlight 160 is set in a lit state to drive the liquid crystal panel 140, a transmitted light “T” allows a particular display screen to be visually recognized.
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Citations
27 Claims
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1. A display device comprising:
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a display unit adapted to allow a first polarized light to be emitted as display light; and
a control unit adapted to control the display unit, wherein the display unit has a polarized light selecting unit on a viewing side thereof, the polarized light selecting unit transmits the first polarized light and reflects a second polarized light having a polarization axis crossing a polarization axis of the first polarized light, and the control unit switches between a display mode, in which the first polarized light is emitted from the display unit as display light, and a mirror mode, in which the first polarized light is not emitted from the display unit. - View Dependent Claims (2)
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3. A display device having a transmitting polarization axis varying unit, the display device including:
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a first polarized light selecting unit disposed on a viewing side of the transmitting polarization axis varying unit; and
a second polarized light selecting unit disposed on a backside of the transmitting polarization axis varying unit, wherein the first polarized light selecting unit transmits a first polarized light and reflects a second polarized light having a polarization axis crossing a polarization axis of the first polarized light, the second polarized light selecting unit transmits a third polarized light and absorbs or reflects a fourth polarized light having a polarization axis crossing a polarization axis of the third polarized light, and the transmitting polarization axis varying unit converts at least a part of the third polarized light to the first polarized light. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25)
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23. An electronic device comprising the display device according to clam 1.
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26. An electronic device comprising a display unit adapted to allow light emission,
wherein the display unit has a polarized light selecting unit adapted to transmit a first polarized light and to reflect a second polarized light having a polarization axis crossing a polarization axis of the first polarized light on a viewing side thereof, and a transmissive display mode, in which the first polarized light is emitted from the polarized light selecting unit on the viewing side to allow the first polarized light to be observed on the viewing side, and a mirror mode, in which the first polarized light is not emitted from the polarized light selecting unit and the polarized light selecting unit is used as a mirror on the viewing side of display unit, are switchable.
Specification