Abstract:
A novel self-supporting flat display screen based on thermionic emission of indirectly heated cathode structures (23, 30, 31, 32, 34; 230, 32, 34) is provided utilizing micro-filament heaters (21) that can be interconnected in any predetermined manner. The planar micro-filament (21) construction utilizes Dewer and Dewer-like techniques (10, 11, 12, 13, 14, 15) for controlling the thermal energy emitted and lowering the power consumption of a display device. Several control electrode techniques (42, 52, 33, 133, 142) are also incorporated in the invention to reduce the voltage levels required to control the display and simplify the overall electronic control circuitry needed by the display device. These techniques are combined to provide a high intensity, high contrast flat panel display using low voltage off-the-shelf electronic driver circuitry.
Abstract:
In a cathode with an electron-emissive material layer formed on a base containing a reducing element, a relationship of 0.24≦B/A≦0.93 is satisfied, where A denotes a surface for layer formation of the base and B represents an area where the base and the electron-emissive material layer are in contact with each other. In addition, a relationship of 0.4≦D/C≦0.7 is satisfied, where C and D denote thicknesses of the base and the electron-emissive material layer, respectively. Thus, a cathode structure is provided in which sufficient electron emission can be obtained, a decrease in electron emission with the passage of time is not much during the operation, and variations in cut-off voltage are small.
Abstract translation:在具有形成在含有还原元素的基底上的电子发射材料层的阴极中,满足0.24 <= B / A <= 0.93的关系,其中A表示用于基底的层形成的表面,B表示面积 其中基底和电子发射材料层彼此接触。 此外,满足0.4 <= D / C <= 0.7的关系,其中C和D分别表示基底和电子发射材料层的厚度。 因此,提供了可以获得足够的电子发射的阴极结构,在操作期间电子发射随时间的减少不太多,并且截止电压的变化小。
Abstract:
A thermionic emitter has a flat emission surface that is subdivided by slits into generally spiral or serpentine conductor sections, the surface having legs extending therefrom that form part of the current supply terminals and that also serve for securing the emitter. Each of these legs has a portion with a longitudinal electrical resistance that is elevated compared to that of the conductor sections, such that areas of maximum temperature migrate from the middle of the emitter to its edges as the heating current increases.
Abstract:
In a cathode with an electron-emissive material layer formed on a base containing a reducing element, a relationship of 0.24 ≤ B/A ≤ 0.93 is satisfied, where A denotes a surface for layer formation of the base and B represents an area where the base and the electron-emissive material layer are in contact with each other. In addition, a relationship of 0.4 ≤ D/C ≤ 0.7 is satisfied, where C and D denote thicknesses of the base and the electron-emissive material layer, respectively. Thus, a cathode structure is provided in which sufficient electron emission can be obtained, a decrease in electron emission with the passage of time is not much during the operation, and variations in cut-off voltage are small.
Abstract:
A method of reducing an effective work function of a surface, for example for use in manufacturing a low temperature thermionic energy conversion device, comprises functionalizing the surface with a surface layer species. The vibrational frequency of the surface layer species matches the natural frequency of electron oscillations at the surface. In a particular embodiment, the method comprises adsorbing atoms or molecules onto the surface of nanoparticles, wherein the vibrational frequency of the atoms or molecules in the surface layer species matches the localized surface plasmon resonance frequency of the nanoparticles.
Abstract:
A cathode including an electron-emitting layer formed on a substrate containing a reductive element satisfies an expression of 0.24
Abstract translation:包含形成在含有还原元件的基板上的电子发射层的阴极满足0.24 B / A <0.93的表达式,其中A是基片的表面积,B是基片之间的接触面积 和电子发射层。 此外,满足0.4≤D/C≤0.7,其中C是衬底的厚度,D是电子发射层的厚度。 这种阴极结构提供足够的电子发射,并且电子发射和截止电压随时间的变化小。