Abstract:
A display device is provided with electron beam guiding channels (10). A channel (10) receives an electron beam (EB) and guides the beam (EB) parallel to a luminescent display screen (40). The electron beam (EB) is extractable from the channel (10), after which the beam (EB) impinges on the display screen (40). Electrode means (11, 12, 13) defining an electric potential in the channel (10) are provided for guiding and extracting the electron beam (EB). The electrode means (11, 12, 13) are arranged in such a way that in the channel (10), the electron beam (EB) is focused in a transverse direction being perpendicular to the channel (10) and parallel to the display screen (40). Thus, the electron transmission of the beam guiding channel (10) can be particularly high.
Abstract:
The method of successively positioning and fixing n plates forming a stack (21-26) relative to a mounting face (20), includes the positioning and alignment, if necessary, of n plates (21-26), each plate (21-26) being retained, after it has been positioned relative to the mounting face (20) or relative to plates (21-25) which have already been positioned, by means of a vacuum in a vacuum pipe in the plates (21-25) already positioned. When all plates (21-26) are positioned and retained by a vacuum system connected to vacuum apertures (201-206) in the mounting face (20), successive plates (21-26) can be fixed relative to each other so as to form the stack of n plates (21-26). The vacuum pipes form ducts in the plates (21-25), at least one duct comprising i (i = 1, 2, 3, ..., n-1) corresponding apertures (215; 214, 224; 213, 223, 233; 212, 222, 232, 242; 211, 221, 231, 241, 251) in i plates (21-25) and being closed by a plate i+1 (21-26). Such stacks are used in thin-type display devices.
Abstract:
The thin-type display device (1) with a vacuum envelope comprises a transparent front wall (3), which is provided with a display screen, and at least an electron source (5) and a duct structure, which cooperates with said electron source (5) and which extends substantially parallel to the front wall (3). Ducts (6, 6', 6'') of the duct structure serve as electron-propagation means and are provided with walls (11, 11', 11'') of an electrically insulating material having a secondary emission coefficient which is suitable for electron propagation. The display device (1) is characterized in that 1 /= 5 mm , where s is the depth of the ducts (6, 6', 6'') and w is the width of the ducts (6, 6', 6''). Preferably, the width w >/= 1.5 mm and the depth 3.5
Abstract:
A picture display device having a vaccum envelope which is provided with a transparent face plate and a display screen having a pattern of luminescent pixels, and with a rear wall, comprising electron-producing means, and addressing system arranged between sais means and the face plate so as to address desired pixels, and, adjacent to the display screen, a plate of electrically insulating material provided with apertures for passing electrons, in operation of voltage difference being applied across said plate, characterized in that the surface at the electron entrance side of the apertured plate is coated with a coating of a material selected from the group comprising substoichiometric nitrides, borides and carbides of A1 and/or Si, and amorphous Si.
Abstract:
Picture display device of the thin-panel type, with a luminescent screen (1), electron source means and an addressing system (100) arranged between these means and the screen. Electrons are directed towards desired locations on the luminescent screen by means of the addressing system. A spacer plate (101) of electrically insulating material, with apertures for passing the electrons, is present between the addressing system and the screen. The spacer plate consists of a material having an electrical resistance R (in OMEGA cm) which complies with the requirement log R (250 DEG C) >/= 8.
Abstract:
A cathode-ray tube is arranged in such a way that a fluorescent screen is formed on a tubular panel, and is scanned by a single electron beam emitted from an electron gun; and a luminescent picture image formed on the screen is viewed from the side on which the electron beam is incident. This beam-indexing color cathode-ray tube has a fluorescent screen (8) which is constituted by a plurality of fluorescent stripes (R), (G), (B), and first and second indexing electrode stripes (ID1), (ID2). The fluorescent stripes (R), (G), (B) are formed by deposition on a panel (4) in such a manner that the stripes are arranged alternately in a direction orthogonal to the scanning direction of a single electron beam (EB), so that each extends in the scanning direction. The first and second indexing electrode stripes (ID1), (ID2) have light-absorbing properties and are formed by deposition on the panel (4) in such a manner that the electrode strips are arranged alternately between adjacent of the fluorescent stripes (R), (G), (B). The color cathode-ray tube is further provided with auxiliary vertical deflection means (24), (25). The fluorescent stripes (R), (G), (B) and the first and second indexing electrode stripes (ID1), (ID2) disposed on either side of each of the stripes (R), (G), (B) are simultaneously scanned by the single electron beam EB. A signal representing the difference between first and second electron beam arrival position detection signals is supplied to the auxiliary vertical deflection means (24), (25) as a correction signal for the vertical deflection, so that the scanning tracking of the single electron beam EB in relation to the fluorescent stripes (R), (G), (B) can be controlled by the auxiliary vertical deflection means (24), (25). Thus it is possible to obtain a beam-indexing color cathode-ray tube which is free from undesirable color smearing, which has a simplified construction, a low separation frequency during color separation modulation of the electron beam (single electron beam) by each of the primary color signals, a high degree of accuracy in detecting the electron beam arrival position, a large detection signal quantity, and which also enables the easy positioning of the indexing electrode stripes and the fluorescent stripes for each of the colors with respect to each other.
Abstract:
A display device comprising electron sources and electron-transport ducts. The display device includes detectors with measuring elements. The transport duct has measuring apertures through which trial currents can be extracted from the transport duct and guided to the measuring element. Such a construction enables an improved uniformity of the picture displayed to be achieved.
Abstract:
A thin-panel picture display device having a luminescent screen. By means of an addressing system, electrons are directed towards desired locations on the luminescent screen. A spacer plate of electrically insulating material, with apertures for passing electrons, is present between the addressing system and the screen. To provide the possibility of applying voltage differences of at least 5 kV across the thickness of the spacer plate, at least the walls of the apertures are coated with a coating of particles of nitrides, borides, carbides, oxides of chromium, yttrium, tantalum, with a secondary emission coefficient of delta max OMEGA /c.
Abstract:
The invention relates to a new scanning method and device for matrix panel display. In one embodiment, the invention comprises a method using electron beam to scan comprising the steps: connecting each anode of dc matrix display panel to the display electrical supply's positive pole via a switch cell whose on-off status is controlled by electron beam, using one electron beam to irradiate to some anode to change the on-off status of the switch cell conducted with it; using another electron beam to irradiate to some cathode of the display panel to conduct this cathode with the display electrical supply's negative pole; thereby selecting the unique display cell at the intersection of anode and cathode to light up; deflecting both beams accordingly to implement two-dimensional addressing in the way of space-shift; and adjusting beam current of the irradiating cathode to achieve image gray scale adjustment. In another embodiment, the invention comprises a device using electron beam to scan for plasma matrix panel display, comprising direct-current plasma display panel means comprising display discharging cells formed at the intersections of the anodes and cathodes and switch cells formed at the intersections of the anodes and collection electrodes, with the anodes being arranged into different sets corresponding to the collection electrodes; two electron beam scanning means, each comprising an electrode-array target screen where target electrodes are connected to display panel's anodes and cathodes, display electrical supply whose output voltage is greater than or equal to the sum of the breakdown voltage of display discharging cell and the maintaining voltage of switch cell; and delay-circuit means for longer pixel duty cycle. One electron beam scans anodes and closes the related switch cells to link display supply; another electron beam scans cathodes to conduct this cathode with the display electrical supply's negative pole to make a unique moving display cell to emit light so as to realize two-dimensional scanning and display, thereby substantially simplifying the scanning and display circuitry to achieve high-quality of larger area panel display and to lower production cost of panel display systems.