摘要:
Disclosed herein is a method of increasing the luminescence efficiency of a translucent phosphor ceramic. Other embodiments are methods of manufacturing a phosphor translucent ceramic having increased luminescence. Another embodiment is a light emitting device comprising a phosphor translucent ceramic made by one of these methods.
摘要:
A light emitting device comprising a light emitting component that emits light with a first peak wavelength, and at least one sintered ceramic plate over the light emitting component is described. The at least one sintered ceramic plate is capable of absorbing at least a portion of the light emitted from said light emitting component and emitting light of a second peak wavelength, and has a total light transmittance at the second peak wavelength of greater than about 40%. A method for improving the luminance intensity of a light emitting device comprising providing a light emitting component and positioning at least one translucent sintered ceramic plate described above over the light emitting component is also disclosed.
摘要:
Disclosed herein is a method of increasing the luminescence efficiency of a translucent phosphor ceramic. Other embodiments are methods of manufacturing a phosphor translucent ceramic having increased luminescence. Another embodiment is a light emitting device comprising a phosphor translucent ceramic made by one of these methods.
摘要:
One embodiment provides a method for fabricating a translucent phosphor ceramic compact comprising: heating a precursor powder to at least about 1000° C. under a reducing atmosphere to provide a pre-conditioned powder, forming an intermediate compact comprising the pre-conditioned powder and a flux material, and heating the intermediate compact under a vacuum to a temperature of at least about 1400° C. In another embodiment, the compact may be a cerium doped translucent phosphor ceramic compact comprising yttrium, aluminum, oxygen, and cerium sources. Another embodiment may be a light emitting device having the phosphor translucent ceramic provided as described herein.
摘要:
A sheet suction device includes a sheet bearer having a plurality of suction holes on a plurality of bearing areas, a rotational portion having a plurality of holes that is connectable to the plurality of suction holes, a suction unit configured to suck air via the plurality of holes of the rotational portion. The sheet bearer bears a plurality of sheets on the plurality of bearing areas of the circumferential surface of the sheet bearer and rotates. The rotational portion rotates in a same cycle of the sheet bearer. The sheet suction device further includes a switching unit that switches combinations of whether or not to suck the air among the plurality of bearing areas of the sheet bearer according to a phase of rotation of the sheet bearer or the rotational portion.
摘要:
A recording-material cooling device includes a first belt, a first cooling unit, and a second cooling unit. The first belt is disposed at a first face side of a recording material. The first cooling unit has a first heat absorbing surface to contact the first belt to absorb heat of the recording material. The second cooling unit has a second heat absorbing surface to directly or indirectly contact the recording material to absorb heat of the recording material. The second cooling unit is disposed at a second face side of the recording material. The first and second cooling units are offset from each other in a transport direction of the recording material. Each of the first and second surfaces has a shape in which an inner area protrudes beyond opposed ends in the transport direction. The first and second surfaces overlap each other in a direction crossing the transport direction.
摘要:
An image forming apparatus includes a cooling conveyor to cool a recording material having an image fixed by heat while sandwiching and conveying the recording material. The cooling conveyor includes a conveyance belt, a cooling member, and a cooling unit. The conveyance belt sandwiches and conveys the recording material. The cooling member absorbs heat of the recording material via the conveyance belt. The cooling unit maintains the cooling member at low temperature. The cooling conveyor performs control of stopping the cooling unit in a standby state of the image forming apparatus, activating the cooling unit and performing a preliminary cooling operation to decrease temperature of the cooling member after a shift from the standby state to image forming operation, and then bringing the recording material into contact with the conveyance belt.
摘要:
A recording-material cooling device includes a first belt, a first cooling unit, and a second cooling unit. The first belt is disposed at a first face side of a recording material. The first cooling unit has a first heat absorbing surface to contact the first belt to absorb heat of the recording material. The second cooling unit has a second heat absorbing surface to directly or indirectly contact the recording material to absorb heat of the recording material. The second cooling unit is disposed at a second face side of the recording material. The first and second cooling units are offset from each other in a transport direction of the recording material. Each of the first and second surfaces has a shape in which an inner area protrudes beyond opposed ends in the transport direction. The first and second surfaces overlap each other in a direction crossing the transport direction.
摘要:
Disclosed herein are emissive ceramic elements having low amounts of certain trace elements. Applicants have surprisingly found that a lower internal quantum efficiency (IQE) may be attributed to specific trace elements that, even at very low amounts (e.g., 50 ppm or less), can cause significant deleterious effects on IQE. In some embodiments, the emissive ceramic element includes a garnet host material and an amount of Ce dopant. The emissive ceramic element may, in some embodiments, have an amount of Na in the composition less than about 67 ppm, an amount of Mg in the composition less than about 23 ppm, or an amount of Fe in the composition less than about 21 ppm.
摘要:
Disclosed herein is a method of increasing the luminescence efficiency of a translucent phosphor ceramic. Other embodiments are methods of manufacturing a phosphor translucent ceramic having increased luminescence. Another embodiment is a light emitting device comprising a phosphor translucent ceramic made by one of these methods.