Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
1998-05-19
2001-05-08
Saras, Steven (Department: 2675)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C315S169400, C313S582000
Reexamination Certificate
active
06229504
ABSTRACT:
TECHNICAL FIELD
The invention relates to the field of gas-discharge technology and can be used in means of video information displaying. There is known a gas-discharge display panel wherein every display element includes a display discharge gap produced by an address and common display electrodes being on one glass plate and a controlling discharge gap produced by an address display electrode and a control electrode being on the other glass plate at right angles to the display electrodes with the display elements along the display electrodes being separated from each other by dielectric barrier ribs with the control electrodes between them (See the article Dick G. W. “three-electrode-per-pel AC Plasma Display Panel” IEEE Transaction on electron devices, vol. ED-33 1986, pp 1169-1173).
BACKGROUND ART
The reasons impeding achievement of the technical result required when using the known apparatus relates the fact that in the known apparatus there are no conditions to improve luminous efficiency. There is a gas-discharge display panel of alternating current (AC plasma display panel) wherein every display element comprises a display discharge gap produced by protrusions on an address and common display electrodes being on one glass plate and a controlling discharge gap produced by an address display electrode and control electrode being on the other glass plate at the right angle to the display electrodes over the protrusions on them (See the patent EU no. 0536 313 A1 issued on Feb. 28, 1990 cl GO9 G3/28).
The reasons impeding achievement of the technical results required when using the known apparatus relates to the fact that in the known apparatus:
there are no conditions for improvement of light efficiency, low predictability because of necessity to make protrusion on display electrode and precis registration of them with control electrodes arranged on the other glass plate and low color contrast when displaying color video information due to a lack of separating barrier ribs between display elements with photoluminescent phosphors of different colors. There is an ac plasma display panel with each display element comprising a display discharge gap formed by protrusion on the address and common display electrodes arranged on the glass plate, and the control electrode arranged on the same plate over the display electrodes and at a right angle to them, with the display electrodes and the control electrode being separated from each other by a dielectric layer, and the control electrodes are being coated by a dielectric layer (See the patent EU NO. 0530 348 A1 issued on Jan. 10, 1990 cl HO1 J17/49).
The reasons impeding achievement of the technical result required when using the known apparatus relates to the facts that in the known apparatus: there are no conditions to improve luminous efficiency, low productability of the design due to the necessity of making a protrusion on the display electrodes and increased amplitude of discharge sustain voltage impulses and driving because of two dielectric layers being over the display electrodes.
There is an AC plasma display panel with each display element comprising a display discharge gap formed by the address and common display electrodes arranged on one glass plate and a controlling discharge gap formed by the address display electrode and the control electrode arranged on the other glass plate at a right angle to the display electrodes, with the control electrodes being arranged between the dielectric barrier ribs with their height defining the space between the glass plates and in display elements being photoluminescent phosphors deposited on the control electrodes and walls of dielectric barrier ribs (See the patent EU no. 0554 172 A1 issued on Jan. 27, 1993 cl MO1 J17/49).
The reasons impeding achievement of the technical result when using the known apparatus as a prototype relates to the fact that in the known apparatus there are no conditions for the improvement of luminous efficiency.
DISCLOSURE OF INVENTION
The invention's essence consists of the following: The present invention is directed to decision of the task of enhancing performance, particularly the improvement of an image brightness and the lowering of power consumption of a flat screen based on a plasma display panel and promotion competitive capability with CRTs in the displaying of video information.
The technical result possible to be archived with the embodiment of this invention consists of improvement of luminous efficiency of the AC plasma display panel. The given technical result during the embodiment of the invention is achieved by the fact that in the known plasma display panel with a surface discharge each display element comprises at least, one display discharge gap formed by the address and common display electrodes and the controlling discharge gap formed by the control and address display electrodes wherein the improvement consists of the number of display discharge gaps in each display element being n−1 the number of display electrodes in n≧3, and geometric parameters of all the above gaps and gas filling have been determined by the condition of the embodiment in a display element of a reverse surface discharge.
With the total number of the display electrodes in a display element being equal to three, one of the electrodes is used as an address electrode, and the lateral electrodes are used as common display electrodes, with the common display electrodes of the plasma display panel being united in two groups so that the common display electrodes of one and the same display element belong to different groups, and all display electrodes have inputs to be connected to a multi-phase source of the discharge support voltage pulses made with feasibility to ensure a timing pulse shift for a reverse change in the direction of a surface discharge transfer over all display gaps of display element, and the control and address display electrodes have inputs to be connected to a source of control pulses, each display element comprising a photoluminescent phosphor deposited outside the direct discharge zone in the display discharge gaps, the distance between any adjacent display electrodes in a display element being the same, and the width of the common display electrodes is equal to the width of the address display electrodes, and the width of the control electrodes is equal to the width of the address display electrodes.
Existence in a display element of several, and in particular, two display discharge gaps the number being a unit less than the total number of the display electrodes when providing conditions to achieve a reverse change in direction of a surface discharge transfer from one extreme display electrode to the other and back, makes it possible to provide a successive excitation of a photoluminescent phosphor over the whole area of the display element thereby improving luminescence. No magnification of a pulse amplitude of the discharge sustain voltage occurs at the expense of additional losses of charged particles onto the walls of a display element in comparison to the case in which the increase of the distance between the display electrodes in the known plasma display panels with one display discharge gap in a display element. Improvement of luminescence brightness in a plasma display panel according to the present invention also results from excitation of a photoluminescent phosphor in adjacent display discharge gaps of a display element during transferring of a surface discharge over it with the reverse change in direction making a contribution to reduction of power consumption. The selection must be an equal distance in a display element and between any adjacent display electrodes of the plasma display panel. An equal width of the common address display electrodes and also the control and address display electrodes provides optimal conditions for developing and sustaining a discharge in all discharge gaps of the plasma display panel excluding enlargement of pulse amplitudes of discharge currents and voltages, and high productability o
Andreev Anatoly Sergeyevich
Baranov Robert Pavlovich
Gutman Victor Markusovich
Ivlyushkin Alexei Nicholayevich
Lee Chun Woo
Bell Paul A.
Merchant & Gould P.C.
Orion Electric Co. Ltd.
Saras Steven
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