EP1258900A2 - Plasmabildschirm vom Oberflächenentladungstyp - Google Patents
Plasmabildschirm vom Oberflächenentladungstyp Download PDFInfo
- Publication number
- EP1258900A2 EP1258900A2 EP02100370A EP02100370A EP1258900A2 EP 1258900 A2 EP1258900 A2 EP 1258900A2 EP 02100370 A EP02100370 A EP 02100370A EP 02100370 A EP02100370 A EP 02100370A EP 1258900 A2 EP1258900 A2 EP 1258900A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- discharge
- electrodes
- dielectric layer
- plasma display
- plasma
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
- H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
- H01J11/20—Constructional details
- H01J11/34—Vessels, containers or parts thereof, e.g. substrates
- H01J11/38—Dielectric or insulating layers
Definitions
- the invention relates to a plasma screen equipped with a carrier plate, one clear faceplate, a ribbed structure that defines the space between the support plate and Front panel divided into plasma cells, which are filled with a gas, with a Electrode array of pairs of discharge electrodes, which are in pairs on either side of one Discharge path are arranged on the front panel, with a dielectric layer that covered the electrode array on the front panel and covered with an electrode array Address electrodes on the carrier plate.
- the light is reflected by a Gas discharge generated in a three-electrode system.
- the three-electrode system exists per pixel from an address electrode and two discharge electrodes, between which in AC voltage is present during operation.
- Known plasma screens of this type include a transparent front panel and one Carrier plate that are spaced apart and peripheral hermetic are closed. The space between the two plates forms the discharge space in which a gas filling for gas discharge is included. Individually controllable plasma cells are formed by a rib structure with separating ribs.
- the inside of the front panel carries a number of pairs of elongated discharge electrodes, which are arranged in pairs parallel to each other
- the discharge electrodes are covered with a layer of a dielectric material.
- the inside of the carrier plate carries a number of elongated address electrodes, which are also arranged parallel to one another
- the pixels of the plasma screen in the three primary colors red, blue and green are formed by a phosphor layer on at least part of the carrier plate and / or on the walls of the separating ribs.
- the front plate and carrier plate are mounted so that the longitudinal direction of the discharge electrodes is arranged orthogonally to the longitudinal direction of the address electrodes.
- Each of the Crossing point of a pair of discharge electrodes and an address electrodes defined a plasma cell, i.e. a discharge region in the discharge space.
- a rectangular alternating voltage (sustain voltage) of, for example, approximately 100 kHz is present at all pixels.
- the amplitude is 160 V and is therefore less than the ignition voltage.
- the sustain voltage and the ignition voltage depend on the distance and the shape of the address and discharge electrodes, on the chemical composition and the gas pressure of the gas filling and on the properties of the dielectric layer which covers the discharge electrodes. If a pixel is to be activated, a voltage of 160 V to 180 volts is applied to the corresponding address and discharge electrodes, which now triggers a gas discharge at the crossing points in the discharge region. A transitory gas discharge is formed.
- the UV radiation emitted by the discharge region stimulates the phosphor layer to emit visible light, which appears through the front panel as an image point.
- the voltage pulse is also referred to as a write pulse.
- a brief current flows until the capacities are charged.
- a wall charge forms.
- the wall charge voltage is added to the subsequent negative pulse voltage of 160 V, so that a discharge is triggered again. This will reload the capacity. This is repeated until the discharge is stopped by an erase pulse.
- a pixel that has been activated lights up until it is deleted. This is called the memory function of the plasma screen.
- the deletion pulse is so short that the capacities can be discharged, but not reloaded. Without wall charge voltage, the voltage for an ignition is not sufficient for the next pulse. The pixel remains dark.
- the capacitance of the dielectric layer influences the energy consumption of the plasma display. If the capacitance of the dielectric layer is high, it flows with each discharge a high discharge current and the energy consumption is greater. From US 5,703,437 it is known, the energy consumption of a surface discharge type AC plasma display by choosing a material for the dielectric layer that has a low Dielectric constant and thus has a low capacitance.
- a low capacitance of the dielectric layer over the discharge electrodes is required but higher ignition, sustain and erase voltages and such higher operating voltages reduce the life of the screen and require a more complex Drive electronics.
- the idea of the invention is to provide a plasma screen of the surface discharge type create in which the dielectric layer over the discharge electrodes a capacitive Forms coupling structure that acts as a capacitive voltage divider. Where the capacity of the dielectric layer is high, the field lines are bundled and the ignition voltage emiedrigt. Where the capacitance of the dielectric layer is low, the energy density is Discharge lower and plasma efficiency increased. This makes it high at the same time Plasma efficiency and low reactive power as well as a low voltage level and a longer lifespan achieved.
- the present one has particularly advantageous effects over the prior art Invention if the capacitance C of the first dielectric layer is a minimum, which is flanked on both sides by a maximum, has a discharge channel.
- the capacitance C of the first dielectric layer is varied by means of the layer thickness d.
- Dielectric layers can easily be applied in different layer thicknesses, therefore the production is uncomplicated and involves little risk of rejects.
- the capacitance C of the first dielectric layer can also be preferred for the capacitance C of the first dielectric layer to be the dielectric constant ⁇ is varied.
- the surface of the front plate facing the plasma can be essentially planar being held.
- the discharge electrodes can pass through Bus electrodes of the first and second type can be contacted to set the ignition voltage for the gas discharge further decrease.
- a first embodiment of a surface discharge type AC plasma display according to the invention is shown in Figs. 1 and 2. It is a color screen with a three-electrode configuration.
- a single pixel, i.e. a subpixel is represented by a pair of discharge electrodes X1 and X2 and an address electrode Y defined.
- the subpixels for a basic color of the color screen are preferably in a line parallel to the Address electrodes arranged, three subpixels for the three primary colors red green and blue form a pixel.
- the carrier plate successively comprises a substrate 2 made of glass, Quartz or a ceramic, an electrode array of a number of elongated Address electrodes Y, which extend essentially parallel to one another on the substrate, Fluorescent layers 5R, 5B, 5G, which cover the address electrodes, furthermore separating ribs 3, which form a rib structure.
- the ribs of the rib structure are between the individual address electrodes and arranged in parallel with them.
- the front panel also includes a substrate 2. It is usually transparent and exists of glass.
- the faceplate further comprises an array of pairs of elongated ones strip-shaped discharge electrodes X1, X2, which are on the inner surface of the transparent glass substrates are formed. Each pair of discharge electrodes is in pairs arranged and separated by a discharge channel. Every single discharge electrode preferably comprises a transparent strip electrode 6 and a metallic bus electrode 7, which is laminated to the transparent strip electrode.
- the discharge electrodes are each connected to a pole of a high voltage source, so that a high voltage alternating voltage between adjacent electrodes can be created.
- the material of the transparent discharge electrodes is usually a transparent conductive material, such as indium-doped tin oxide (ITO) or non-stoichiometric tin oxide SnO x
- the front panel further comprises a transparent first dielectric layer 4, which the Electrode pairs covered.
- the transparent dielectric layer can be a relatively fine one designed geometric structure from many segments with different capacities exhibit.
- An effective layer thickness can be graded in discrete steps or as a continuous course by varying the thickness of the dielectric layer or by Variation of the area proportions of the dielectric materials take place. It is preferred that the Capacity is constantly varied so that the preferred discharge structure can form.
- the discharge electrodes are as in 1 and 2 shown, covered with a layer of dielectric material in which the thickness the dielectric layer is varied. This layer is between the two discharge electrodes thickened. It tapers symmetrically outwards and continues outward strength again.
- Suitable materials for the dielectric layer for the high voltage used are dielectric, electrically insulating materials (dielectrics), for example. Borosilicate glasses, quartz glass, glass frit, Al 2 O 3 , MgF 2 , LiF, BaTiO 3 . However, the choice of dielectric makerial is not limited to these materials. Other dielectric materials with paraelectric, ferroelectric and antiferroelectric properties can also be used.
- MgO In addition to MgO, CeO 2 , CeO 2 and La 2 O 3 , quartz, borosilicate glass, lead-containing glasses, SiO 2 , Al 2 O 3 titanates of alkaline earth metals such as CaO, SrO and fluorides such as LiF, MgF 2 and KCl can be used for the dielectric layers , MgO in particular causes a low ignition voltage.
- the dielectric can consist of one or more layers.
- this dielectric layer one can, for example, from the known ones Out of thick film techniques. For this, a dielectric paste is placed on the glass substrate printed, sprayed or rolled and then sintered.
- the dielectric layer is also with a layer of magnesium oxide or another low work function material that emits electrons from relieved the substrate, covered.
- the discharge electrodes can in addition to the transparent strip electrodes 6
- Bus electrodes of first type 7 for contacting include the electrical resistance value to reduce the discharge electrodes.
- you can partially use a Metal film can be coated as a bus.
- the first type of bus electrodes can be made of thin Chrome / copper / chrome layers or aluminum films or from a thick silver layer be educated.
- the metallic bus electrodes of the first type are in the embodiment according to FIGS. 1 and 2 on the side periphery of the transparent strip electrodes arranged on the side that opposite to the discharge channel.
- FIGs. 3 and 4 A simple to produce embodiment of a plasma screen according to the invention is shown in Figs. 3 and 4.
- the bus electrodes of the first type are not the same as those of the Discharge path facing away edge of the discharge electrodes, but at the Discharge channel facing edge provided. This creates in the ignition area higher voltage drop across the gas.
- a is transverse to the discharge channel Series of layer segments arranged, the material of different dielectric constants to have.
- Discharge channel to which layer segments with maximum are located on both sides under the electrodes Connect capacity. Where the capacity is high and the potential drop in the dielectric layer is low, a higher potential drop occurs from the electrode to Gas space over the cross section of the dielectric layer. Where the potential drop The potential drop to the discharge space is already high in the dielectric layer lower.
- the potential in the gas discharge space can also be determined by the position, mutual alignment and shape of the electrodes can be influenced.
- the discharge electrodes are in the form of strips with a more uniform shape Width.
- the potential across the discharge path can, however, be broken down by structuring the electrodes are also supported.
- the pairs of discharge electrodes alternate areas of different widths within which the discharge starts or suppresses becomes.
- FIG. 6 shows an embodiment of the discharge electrodes in which the Strip electrodes Comb electrodes with comb-like incisions and T-shaped tines are.
- the T-shaped tines extend transversely to the longitudinal direction of the Electrodes made such that the teeth of adjacent comb electrodes are on top of each other face the same height and limit the discharge channel.
- the comb-like incisions are regularly repeated at a distance that is the width corresponds to a pixel.
- the electrodes are then arranged so that each face two equal areas. This creates diagonal discharge structures suppressed, the discharge burns rather directly to the next adjacent area of the Counter electrode.
- the discharge electrodes can in addition the known first type bus electrodes also include second type bus electrodes 7 '.
- Fig. 5 shows an embodiment of the invention, in which on a comb electrode with a T-shaped Tine the T-bars are covered with island-shaped bus electrodes of the second type 7 '.
- island-shaped bus electrodes of the second type 7 ′ can also be used on unsegmented ones Strip electrodes are applied along the discharge channel.
- This Island-shaped bus electrodes of the second type have the advantage that they ignite the Initiate gas discharge in the center of the discharge channel and thereby losses due to plasma-wall interactions can be reduced.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Gas-Filled Discharge Tubes (AREA)
Abstract
Description
Für einen Farbbildschirm werden die Bildpunkte des Plasmabildschirms in den drei Grundfarben Rot, Blau und Grün durch eine Leuchtstoffschicht auf mindestens einem Teil der Trägerplatte und/oder auf den Wänden der Trennrippen gebildet.
Gleichzeitig bildet sich eine Wandladung Die Wandladungsspannung addiert sich zur anschließenden negativen Impulsspannung von 160 V, so dass wiederum eine Entladung ausgelöst wird. Die Kapazität wird dadurch wieder umgeladen. Dies wiederholt sich solange, bis die Entladung durch einen Löschimpuls gestoppt wird. Ein einmal aktivierter Bildpunkt leuchtet also bis zur Löschung Dies wird als Memory-Funktion des Plasmabildschirms bezeichnet. Der Löschimpuls ist so kurz, dass zwar eine Entladung der Kapazitäten, aber kein Umladung erfolgen kann. Ohne Wandladungsspannung reicht beim nächsten Impuls die Spannung für eine Zündung nicht aus Der Bildpunkt bleibt dunkel.
- Fig. 1
- zeigt eine halbperspektivische Ansicht einer Ausführungsform des erfindungsgemäßen Plasmabildschirms mit variierter Schichtdicke der dielektrischen Schutzschicht.
- Fig. 2
- zeigt einen Querschnitt durch die Ausführungsform des erfindungsgemäßen Plasmabildschirms mit variierter Schichtdicke der dielektrischen Schutzschicht.
- Fig. 3
- zeigt einen Querschnitt durch eine Ausführungsform des erfindungsgämaßen Plasmabildschirms mit Buselektroden zweiter Art.
- Fig. 4
- zeigt eine Aufsicht auf die Frontplatte einer Ausführungsform des erfindungsgemäßen Plasmabildschirms mit einander zugewandten Buselektroden
- Fig. 5
- zeigt einen Querschnitt durch eine weitere Ausführungsform des erfindungsgemäßen Plasmabildschirms mit variierter Kapazität der dielektrischen Schutzschicht.
- Fig. 6
- zeigt eine Aufsicht auf die Frontplatte einer Ausführungsform des erfindungsgemäßen Plasmabildschirms mit strukturierten Streifenelektroden und Buselektroden zweiter Art
- Fig. 7
- zeigt eine Aufsicht auf die Frontplatte einer Ausführungsform des erfindungsgemäßen Plasmabildschirms mit Buselektroden erster und zweiter Art.
Die Wahl des dielektrischen Makerials ist jedoch nicht auf diese Materialien beschränkt. Ebenso können andere dielektrische Materialien mit paraelektrischen, ferroelektrischen und antiferroelektrischen Eigenschaften verwendet werden.
Claims (5)
- Plasmabildschirm ausgerüstet mit einer Trägerplatte, einer Frontplatte, einer Rippenstruktur, die den Raum zwischen Trägerplatte und Frontplatte in Plasmazellen, die mit einem Gas gefüllt sind, aufteilt, mit einem Elektrodenarray aus Paaren von Entladungselektroden, die paarweise jeweils zu beiden Seiten eines Entladungskanals auf der Frontplatte angeordnet sind, mit einer ersten dielektrischen Schicht mit der Dicke d und der Dielektrizitätskonstante ε, die das Elektrodenarray aus Paaren von Entladungselektroden auf der Frontplatte bedeckt, mit einem Elektrodenarray aus Adresselektroden auf der Trägerplatte, wobei die Kapazität C = f( d, ε) der ersten dielektrischen Schicht in einer Richtung transversal zum Entladungskanal variiert ist.
- Plasmabildschirm gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Kapazität C der ersten dielektrischen Schicht über einem Entladungskanal ein Minimum hat, das zu beiden Seiten von einem Maximum flankiert wird. - Plasmabildschirm gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Kapazität C der ersten dielektrischen Schicht mittels der Schichtdicke d variiert ist. - Plasmabildschirm gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Kapazität C der ersten dielektrischen Schicht mittels der Dielektrizitätskonstante ε variiert ist. - Plasmabildschirm gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Entladungselektroden durch Buselektroden erster und zweiter Art kontaktiert sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10118531A DE10118531A1 (de) | 2001-04-14 | 2001-04-14 | Plasmabildschirm vom Oberflächenentladungstyp |
DE10118531 | 2001-04-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1258900A2 true EP1258900A2 (de) | 2002-11-20 |
EP1258900A3 EP1258900A3 (de) | 2005-09-21 |
Family
ID=7681534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02100370A Withdrawn EP1258900A3 (de) | 2001-04-14 | 2002-04-12 | Plasmabildschirm vom Oberflächenentladungstyp |
Country Status (4)
Country | Link |
---|---|
US (1) | US20020167279A1 (de) |
EP (1) | EP1258900A3 (de) |
JP (1) | JP2002324489A (de) |
DE (1) | DE10118531A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7135819B2 (en) * | 2003-03-25 | 2006-11-14 | Lg Electronics Inc. | Plasma display panel |
US20090200942A1 (en) * | 2005-07-26 | 2009-08-13 | Takashi Sasaki | Plasma display panel and plasma display apparatus |
JP2007311128A (ja) * | 2006-05-17 | 2007-11-29 | Advanced Pdp Development Corp | プラズマディスプレイパネル |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07262930A (ja) * | 1994-03-18 | 1995-10-13 | Fujitsu Ltd | 面放電型ガス放電パネル |
EP0860849A2 (de) * | 1997-02-20 | 1998-08-26 | Nec Corporation | Plasma Anzeigetafel hoher Lichtstärke und hoher Leuchtwirkungsgrades |
JPH11233026A (ja) * | 1997-10-23 | 1999-08-27 | Lg Electronics Inc | 互いに異なる厚さの誘電体層を有するプラズマディスプレイパネル |
EP1024516A1 (de) * | 1997-08-19 | 2000-08-02 | Matsushita Electronics Corporation | Gasentladungsanzeigetafel |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3442876B2 (ja) * | 1994-08-31 | 2003-09-02 | パイオニア株式会社 | 交流型プラズマディスプレイ装置 |
JP3224486B2 (ja) * | 1995-03-15 | 2001-10-29 | パイオニア株式会社 | 面放電型プラズマディスプレイパネル |
KR100252990B1 (ko) * | 1997-10-24 | 2000-04-15 | 구자홍 | 아크 방전전극을 갖는 칼라 플라즈마 디스플레이패널 |
JPH11212515A (ja) * | 1998-01-21 | 1999-08-06 | Hitachi Ltd | プラズマディスプレイ装置 |
JP2000047634A (ja) * | 1998-07-29 | 2000-02-18 | Pioneer Electron Corp | プラズマディスプレイ装置の駆動方法 |
JP3478167B2 (ja) * | 1999-04-21 | 2003-12-15 | 日本電気株式会社 | プラズマディスプレイパネル及びその製造方法 |
DE10118530A1 (de) * | 2001-04-14 | 2002-10-17 | Philips Corp Intellectual Pty | Plasmabildschirm mit gekippten Entladungselektroden |
-
2001
- 2001-04-14 DE DE10118531A patent/DE10118531A1/de not_active Withdrawn
-
2002
- 2002-04-12 JP JP2002110673A patent/JP2002324489A/ja active Pending
- 2002-04-12 EP EP02100370A patent/EP1258900A3/de not_active Withdrawn
- 2002-04-12 US US10/122,793 patent/US20020167279A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07262930A (ja) * | 1994-03-18 | 1995-10-13 | Fujitsu Ltd | 面放電型ガス放電パネル |
EP0860849A2 (de) * | 1997-02-20 | 1998-08-26 | Nec Corporation | Plasma Anzeigetafel hoher Lichtstärke und hoher Leuchtwirkungsgrades |
EP1024516A1 (de) * | 1997-08-19 | 2000-08-02 | Matsushita Electronics Corporation | Gasentladungsanzeigetafel |
JPH11233026A (ja) * | 1997-10-23 | 1999-08-27 | Lg Electronics Inc | 互いに異なる厚さの誘電体層を有するプラズマディスプレイパネル |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Section PQ, Week 200106 Derwent Publications Ltd., London, GB; Class P85, AN 2001-044981 XP002337847 & JP 2000 306517 A (NEC CORP) 2. November 2000 (2000-11-02) -& PATENT ABSTRACTS OF JAPAN Bd. 2000, Nr. 14, 5. März 2001 (2001-03-05) & JP 2000 306517 A (NEC CORP), 2. November 2000 (2000-11-02) * |
PATENT ABSTRACTS OF JAPAN Bd. 1996, Nr. 02, 29. Februar 1996 (1996-02-29) & JP 07 262930 A (FUJITSU LTD), 13. Oktober 1995 (1995-10-13) * |
PATENT ABSTRACTS OF JAPAN Bd. 1999, Nr. 13, 30. November 1999 (1999-11-30) & JP 11 233026 A (LG ELECTRONICS INC), 27. August 1999 (1999-08-27) * |
Also Published As
Publication number | Publication date |
---|---|
DE10118531A1 (de) | 2002-10-17 |
JP2002324489A (ja) | 2002-11-08 |
EP1258900A3 (de) | 2005-09-21 |
US20020167279A1 (en) | 2002-11-14 |
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