Image display apparatus
AssigneeCanon Kabushiki Kaisha
InventorShoshiro Saruta
Life of this patent
Estimating the term…
Abstract
An image display apparatus includes a rear plate having a plurality of electron-emitting devices, a face plate having a plurality of pixels, each pixel having one or more phosphors that emit fluorescence in response to electrons emitted from the electron-emitting devices, and a drive circuit for driving the electron-emitting devices. At least one of the phosphors is CaAlSiN3:Eu2+; and the electrons are supplied to the pixels for 2 μs to 70 μs from the electron-emitting devices on a scan basis, each of which devices supplies current to one or more of the phosphors.
Claims12
An image display apparatus comprising:
- a rear plate having a plurality of electron-emitting devices;
- a face plate having a plurality of pixels, each pixel having one or more phosphors that emit fluorescence in response to electrons emitted from the electron-emitting devices;
- and
- a drive circuit for driving the electron-emitting devices, wherein
- at least one of the phosphors is CaAlSiN3:Eu2+, and
- the electrons are supplied to the pixels for 2 μs to 70 μs from the electron-emitting devices on a scan basis, each of which devices supplies current to one or more of the phosphors.
An image display apparatus comprising:
- a rear plate having a plurality of electron-emitting devices;
- a face plate having a plurality of pixels, each pixel having one or more phosphors that emit fluorescence in response to electrons emitted from the electron-emitting devices;
- and
- a drive circuit for driving the electron-emitting devices, wherein
- in at least one pixel of the pixels, a first phosphor and a second phosphor are layered on a substrate of the face plate in order of the second phosphor and then the first phosphor, the first phosphor emits fluorescence in response to the electrons emitted from the electron-emitting devices, and the second phosphor emits, in response to the fluorescence emitted from the first phosphor, a visible light by which the pixel forms an image, and
- the second phosphor is CaAlSiN3:Eu2+.
A field emission display:
- a rear plate having a plurality of wires, each wire being connected to a plurality of electron-emitting devices;
- a face plate having a plurality of pixels, each pixel having an illuminant that emits light in response to electrons emitted from the electron-emitting devices;
- and
- a drive circuit that sequentially selects a wire from the wires and applies a scanning signal to the wire to drive the electron-emitting devices, wherein
- the illuminant comprises CaAlSiN3:Eu2+, and the electrons, emitted from at least one of the electron-emitting devices electrically connected to the wire selected to apply the scanning signal, irradiate the illuminant for 2 μs to 70 μs during a period that the scanning signal is applied to the wire selected.
Dependencies are inferred from the claim text.