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:
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,具有0.24& le的关系; B / A& le; 0.93,其中A表示基底形成层的表面,B表示基底和电子发射材料层相互接触的区域。 另外,关系为0.4& le; D / C& le; 0.7,其中C和D分别表示基体和电子发射材料层的厚度。 因此,提供了一种阴极结构,其中可以获得足够的电子发射,随着时间的推移电子发射的减少在操作期间并不多,并且截止电压的变化很小。 <图像>
Abstract in simplified Chinese:本发明之目的系提供一种阴极结构,乃于含有还原性元素之基体上形成有电子放射物质层的阴极中,就基体之层形成用面为A、基体与电子放射物质层之接触面积为B而言,系设置0.24≦B/A≦0.93。又,就基体之厚度为C、电子放射物质层之厚度为D而言,则设置0.4≦D/C≦0.7。借此,乃可获致充分之电子放射,又动作中之电子放射其少有随时间而衰减的情形,且截止电压之变动亦小。