RU2187861C1 - Gaseous-discharge a c indication panel - Google Patents

Abstract

FIELD: electronics, facilities displaying sign-graphical and TV information. SUBSTANCE: high reliability of control over gaseous-discharge A C indication panel is provided thanks to manufacture of spacers fixing distance between dielectric plates of gaseous-discharge A C indication panel from refractory material which coefficient of linear thermal expansion K_sp amounts to ( 0.85-1.25 ) of coefficient of linear thermal expansion of dielectric covering electrodes. In this case spacers are placed at distance of 15-40 mm one from another. Maximum linear dimension l ( mm ) in direction of electrodes is chosen from relationship 0,1mm≤l≤0,9•l₁, where l₁ - is distance between neighboring edges of adjacent electrodes, mm. EFFECT: high reliability of control over gaseous- discharge A C indication panel thanks to provision for large range of memory. 1 dwg

Description

 The invention relates to electronic equipment and can be used to create indicator devices for displaying sign and television information.

 A known design of a gas discharge indicator panel (GUI) of alternating current, containing two dielectric plates on which electrode systems coated with a dielectric are located, metal gaskets that fix the distance between dielectric coatings on the electrodes [UK patent 1509487, NID, 1978].

 The disadvantage of this design of the ACI HID is that the gaskets have a width of less than 0.1 mm, which leads to cracking of the dielectric coating on the electrodes and breakdowns during operation of the ACI HIP.

 A known design of an AC UIP containing two dielectric plates, display cells formed at the crossroads of two mutually orthogonal systems of electrodes coated with a dielectric, gaskets defining the distance between dielectric coatings on electrodes made in the form of rods of refractory glass coated with a material with a lower temperature melting, for example, with low-melting glass (LPS) [PCT application 81/01910, H 01 J 61/30, 1981].

 The disadvantage of this design of the ACI GUI is the high complexity of the manufacture of gaskets, low memory range caused by uneven coating on the electrodes due to extrusion of molten fusible glass from under the gaskets during pumping, as well as in the case of use of emission material due to its poisoning in the zones, adjacent to gaskets extruded from under the gaskets by low-melting glass.

 Closest to the proposed invention is an alternating current ISU containing a first dielectric plate with a system of first electrodes on which a dielectric layer is formed, a second dielectric plate with a system of second electrodes coated with a dielectric layer and arranged orthogonally to the first electrodes, gaskets made of refractory material, for example metal, fixing the distance between the dielectric layers on the first and second electrodes, and the sealing joint [USSR copyright certificate 1480651, H 01 J 17/49, 1995 - prototype].

 The disadvantage of this ACI AC is the low memory range caused by the presence of cod in the dielectric layers and glass deflections in the areas between the gaskets.

 The objective of the invention is the creation of a GUI AC with high reliability control by providing a large range of memory.

The specified technical effect during the implementation of the invention is achieved by the fact that in the known GUI of alternating current containing a first dielectric plate with a system of first electrodes on which a dielectric layer is formed, a second dielectric plate with a system of second electrodes coated with a dielectric layer and arranged orthogonally to the first electrodes , gaskets made of refractory material, for example metal, fixing the distance between the dielectric layers on the first and second electrodes, and the joint ii, gaskets are located at a distance of 15-40 mm from each other and are made of material, the coefficient of linear thermal expansion (KLTR) K _pr which is selected from the expression:
K _ave = (0,85-1,25) K _d,
where K _d is the coefficient of linear thermal expansion of the dielectric.

 When these conditions are met, cracking of the dielectric layer in the areas of the gaskets and deflection of the plates in the gap between the gaskets is excluded.

The positive effect is enhanced if the maximum linear size 1 (mm) of the gaskets in the direction of the first and second electrodes is selected from the ratio
0.1 mm≤1≤0.91 ₁ ,
where l ₁ is the distance between the adjacent edges of adjacent electrodes in the system with the smallest distance between the electrodes, mm

 In this case, the gaskets do not affect the electrical parameters of the cells near which they are located.

 The analysis of the prior art by the applicant, including a search by patent and scientific and technical sources of information, and the identification of sources containing information about analogues of the claimed invention, allows us to establish that the applicant has not found an analogue characterized by features identical to those of the claimed invention, and a definition from the list of identified analogues of the prototype, as the closest in the totality of the features of the analogue, allowed to identify the set of essential in relation to the applicant to technical result of the characterizing features claimed in the object set forth in the claims.

 Therefore, the claimed invention meets the requirement of "novelty."

 To verify the conformity of the claimed invention to the requirements of the inventive step, an additional search was carried out for known solutions in order to identify features that match the distinctive features of the claimed invention, the results of which show that the claimed invention does not explicitly follow from the prior art, as it has not been identified technical solutions in which an increase in the memory range in the ACI of an alternating current would be achieved by choosing the material of the electrodes These relations and location pads at a distance of 15-40 mm from each other. Also, technical solutions were not identified in which an increase in the memory range would be ensured by choosing the size of the gaskets depending on the distances between the electrodes.

 Thus, the claimed invention meets the requirement of "inventive step".

 The invention is illustrated in the drawing, which shows one of the options for the ISU AC.

 The alternating current ISU (Fig. 1) contains the first 1 and second 2 dielectric plates, two intersecting mutually orthogonal systems of electrodes 3 and 4, on which a dielectric layer 5 and a layer of emission material 6 are applied, gaskets 7, fixing the distance between the layers of dielectric material, sealing joint 8.

 The ACI GUI works as follows.

 When voltage pulses are applied to the corresponding electrodes 3 and 4 in the cells formed at the crosshairs of these electrodes, a gas discharge occurs, which provides information display.

 To ensure a high quality of the coating on the electrodes in the ACI GUI by eliminating its cracking and eliminating the deflection of the dielectric plate in the gap between the KLTE gaskets, the gasket material should be (0.85-1.25) from the KLTE of the dielectric covering the electrodes, and the distance between the gaskets should correspond to 15-40 mm.

If in the design the value of K _pr goes beyond the values of (0.85-1.25) K _d , then crackling occurs in the layers of the dielectric in the areas of the gaskets.

 If the distance between the spacers is more than 40 mm, then between them there is a deflection of the dielectric plate with electrodes and, therefore, the interelectrode distance decreases, which leads to a decrease in the range of "memory".

 If the distance between the gaskets is less than 15 mm, then the cost of the GUI increases, while the quality remains unchanged.

If the dimensions of the gaskets are l> 0.91 ₁ , then non-luminous points appear in the ACI of the alternating current in the area of the gaskets.

 If 1 is less than 0.1 mm, then crackling is observed in the dielectric layers in the areas of the gaskets.

 An example of a specific implementation.

ISU AC contains the first and second dielectric plates of size 220 • 220 • 5 mm. A system of electrodes (256 pcs.) Made of gold is formed on both dielectric plates. The electrodes have a width of 100 μm, a thickness of 6 μm in increments of 500 μm, while the distance between the adjacent edges of adjacent electrodes is 1 ₁ = 400 μm.

A layer of 25 microns thick of low-melting glass (LPS) C82-3, having K _d = 82 • 10 ^-7 1 / deg, on which an emission coating of magnesium oxide with a thickness of 0.1 microns is formed, is deposited on the electrodes of each system. Dielectric plates with electrodes are located one above the other, forming cells at the crosshairs of the electrodes. The distance between the LPS layers covering the electrodes of the two systems is fixed by spacers of alloy 47 ND with K _pr = 98 • 10 ^-7 1 / deg, having a thickness of 90 μm and dimensions in the direction corresponding to the direction of the electrodes of one system 300 μm, and the same in direction perpendicular to her.

K corresponds to the expression K _{pr pr} = (0,85-1,25) K _d, i.e., K _pr / K _d = 98 • 10 ^-7 / 82 • 10 ^-7 = 1.2. The gaskets are evenly distributed over the display field and are 2 cm apart. Dielectric plates are connected around the perimeter by a sealing seam made of C 73 glass.

 The panel is filled with He + 45% Ne + 0.5% Xe at a pressure of 400 mm Hg.

 The dynamic control range of such a GUI of an alternating current is 14V, which is 2 times greater than that of the well-known, commercially available GUIs of an alternating current.

 Thus, the present invention allows to create a GUI AC with a large range of memory, providing high reliability control.

Claims (2)

1. A gas discharge indicator panel of alternating current, comprising a first dielectric plate with a system of first electrodes located on it, on which a dielectric layer is formed, a second dielectric plate with a system of second electrodes coated with a dielectric layer and arranged orthogonally to the first electrodes, gaskets made of refractory material, fixing the distance between the dielectric layers on the first and second electrodes of the systems, and the sealing seam, characterized in that the gaskets of refractory material are located us at a distance of 15-40 mm from each other and are made of refractory material, the coefficient of linear thermal expansion of which is selected from the expression
K _ave = (0,85-1,25) K _d,
where K _CR - the coefficient of linear thermal expansion of the refractory material from which the gaskets are made;
To _d - the coefficient of linear thermal expansion of the dielectric covering the electrodes. 2. The gas-discharge indicator panel according to claim 1, characterized in that the maximum size of the gaskets of refractory material 1 (mm) in the direction of the first and second electrodes of the systems is selected according to the expression
0.1 mm≤l≤0.9 l ₁ ,
where l ₁ is the distance between the adjacent edges of adjacent electrodes in the system with the smallest distance between the electrodes, mm