Display device
AssigneeKabushiki Kaisha Toshiba
InventorsKazuki Taira, Masaaki Tamatani, Yasushi Kawata
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Abstract
A display device comprises a display element for displaying luminous images corresponding to color information on a second face of a screen; a polarization converting sheet which is disposed on the screen so that light irradiated from the screen enters and transmits selectively light having a first mode of polarization; and a liquid crystal color shutter which is disposed on the polarization converting sheet and transmits selectively light having the first mode of polarization so as to output as light of at least one color of primary colors corresponding to the color information. A display device may be an achromatic CRT. Thereby, a display device bright and large in its display screen can be realized with a simple constitution.
Claims25
A display device, comprising:
- displaying means for displaying luminous images corresponding to color information, including a screen having a phosphor layer emitting a light according to information of the luminous images;
- first selecting means to selectively transmit a light having a first mode of polarization and to reflect a light except the light having the first mode of polarization, the first selecting means being disposed closely opposite to the phosphor layer so that the emitted light from the phosphor layer is introduced to the first selecting means;
- and,
- second selecting means to selectively transmit light has the first mode of polarization so that a light output having at least one of primary colors corresponding to the color information, the second selecting means being disposed on the first selecting means.
A display device, comprising:
- a CRT for displaying luminous images corresponding to color information, including a screen having a phosphor layer emitting a light according to information of the luminous images;
- a polarization converting element to selectively transmit a light having a first mode of polarization and to reflect a light except the light having the first mode of polarization, the polarization converting element being disposed closely opposite to the phosphor layer so that the emitted light from the phosphor layer is introduced to a first layer;
- and,
- a liquid crystal color shutter to selectively transmit light having the first mode of polarization so that a light output having at least one of primary colors corresponding to the color information, the liquid crystal color shutter being disposed on the polarization converting element.
Dependencies are inferred from the claim text.