DE102011086646B4 - Screen and method for controlling a screen - Google Patents
Screen and method for controlling a screen Download PDFInfo
- Publication number
- DE102011086646B4 DE102011086646B4 DE201110086646 DE102011086646A DE102011086646B4 DE 102011086646 B4 DE102011086646 B4 DE 102011086646B4 DE 201110086646 DE201110086646 DE 201110086646 DE 102011086646 A DE102011086646 A DE 102011086646A DE 102011086646 B4 DE102011086646 B4 DE 102011086646B4
- Authority
- DE
- Germany
- Prior art keywords
- screen
- driver
- display device
- invert signal
- invert
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 8
- 239000011159 matrix material Substances 0.000 claims description 10
- 230000005855 radiation Effects 0.000 claims description 7
- 230000005670 electromagnetic radiation Effects 0.000 claims description 2
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 239000000969 carrier Substances 0.000 description 2
- 230000001609 comparable effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/98—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0275—Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2358/00—Arrangements for display data security
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Ein Bildschirm (1) mit einer Anzeigeeinrichtung (2) sowie einer zur Ansteuerung der Anzeigeeinrichtung (2) ausgebildeten Ansteuereinheit (3) weist einen eine Komponente der Ansteuereinheit (3) bildenden Invertsignalgenerator (4) auf, welcher dazu ausgebildet ist, zusammen mit der Emission eines betriebsbedingten elektromagnetischen Signals ein dieses neutralisierendes Invertsignal zu emittieren.A screen (1) with a display device (2) and a drive unit (3) designed to drive the display device (2) has an invert signal generator (4) forming a component of the drive unit (3), which is designed to be used together with the emission an operational electromagnetic signal to emit this neutralizing Invertsignal.
Description
Die Erfindung betrifft einen auf Abhörsicherheit ausgelegten Bildschirm sowie ein Verfahren zur Ansteuerung eines solchen Bildschirms.The invention relates to a screen designed for privacy and a method for controlling such a screen.
Aus der
Der Überlagerungssender nach der
Statt des Einsatzes eines Senders, welcher die betriebsbedingten Emissionen einer Datenverarbeitungsanlage oder eines Bildschirms überlagert und damit die Auswertung dieser Emissionen erschwert, ist grundsätzlich auch die Möglichkeit gegeben, eine komplette Datenverarbeitungsanlage oder eine Komponente einer solchen Anlage abzuschirmen und damit abhörsicher zu machen.Instead of the use of a transmitter, which superimposes the operational emissions of a data processing system or a screen and thus complicates the evaluation of these emissions, in principle also given the opportunity to shield a complete data processing system or a component of such a system and thus make tap-proof.
Die Abschirmung elektromagnetischer Emissionen, die von einem Datenverarbeitungsgerät oder von einer Anzeigevorrichtung ausgehen, hat auch einen Aspekt des Gesundheitsschutzes. Beispielhaft wird in diesem Zusammenhang auf die
Aus der
Der Erfindung liegt die Aufgabe zugrunde, die Abhörsicherheit eines Bildschirms gegenüber dem genannten Stand der Technik weiterzuentwickeln.The invention has for its object to further develop the privacy of a screen against the cited prior art.
Diese Aufgabe wird erfindungsgemäß gelöst durch einen Bildschirm mit den Merkmalen des Anspruchs 1 sowie durch ein Verfahren zur Ansteuerung eines Bildschirms mit den Merkmalen des Anspruchs 6. Im Folgenden im Zusammenhang mit dem Bildschirm erläuterte Ausgestaltungen und Vorteile gelten sinngemäß auch für das Verfahren und umgekehrt.This object is achieved by a screen with the features of claim 1 and by a method for driving a screen with the features of
Der Bildschirm umfasst eine Anzeigeeinrichtung, insbesondere ein TFT-Display, sowie eine zu deren Ansteuerung vorgesehene Ansteuereinheit.The screen comprises a display device, in particular a TFT display, as well as a drive unit provided for its control.
Im grundsätzlichen Unterschied zum in der
Der erfindungsgemäße Bildschirm strahlt aufgrund der aktiven Kompensation der elektromagnetischen Emissionen ein Signal aus, welches als einfarbiger Bildschirm interpretierbar und damit für eine Rekonstruktion der ursprünglichen Information nicht verwendbar ist.The screen according to the invention emits a signal due to the active compensation of the electromagnetic emissions, which signal can be interpreted as a monochrome screen and thus can not be used for a reconstruction of the original information.
In bevorzugter Ausgestaltung ist der Invertsignalgenerator zu einem Spaltentreiber der Anzeigeeinrichtung parallel geschaltet. Hierbei setzt sich der Invertsignalgenerator bevorzugt aus mehreren Invertierern zusammensetzen, die jeweils parallel zu den Eingängen einzelner Spaltentreiber geschaltet sind. Jeder einzelner Invertierer erzeugt zu dem ihm zugeordneten einzelnen Spaltentreiber ein invertiertes Signal.In a preferred embodiment, the invert signal generator is connected in parallel with a column driver of the display device. In this case, the invert signal generator is preferably composed of a plurality of inverters which are each connected in parallel with the inputs of individual column drivers. Each individual inverter generates an inverted signal to the individual column driver associated with it.
Der Invertsignalgenerator des Bildschirms umfasst vorzugsweise eine Invertiermatrix sowie eine Treibermatrix, wobei die Treibermatrix analog zum Spaltentreiber ausgestaltet ist. Optional ist zur Abstrahlung des Invertsignals eine Abstrahlmatrix vorgesehen.The Invertsignalgenerator of the screen preferably comprises an inverting matrix and a driver matrix, wherein the driver matrix is designed analogous to the column driver. Optionally, a radiation matrix is provided for emitting the invert signal.
Der Vorteil der Erfindung liegt insbesondere darin, dass mit geringem apparativem Aufwand und ohne Beeinträchtigung der Bildqualität die Abhörsicherheit eines Bildschirms allein durch Erzeugung invertierter Signale im Sinne einer aktiven Emissionskompensation hergestellt wird.The advantage of the invention is, in particular, that with little outlay on equipment and without impairment of the image quality, the security against eavesdropping of a screen is produced solely by generating inverted signals in the sense of active emission compensation.
Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Hierin zeigen:An embodiment of the invention will be explained in more detail with reference to a drawing. Herein show:
Ein in
Während der Spaltentreiber
Wie aus
In jedem Fall weist die Anzeigeeinrichtung
In der rechten Hälfte von
Ein unbefugter Beobachter, der den Bildschirm
In
Weitere Merkmale des Bildschirms
Zusätzlich zu üblicherweise bei Bildschirmen vorhandenen Eingängen, nämlich einem Gleichspannungsanschluss
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110086646 DE102011086646B4 (en) | 2011-11-18 | 2011-11-18 | Screen and method for controlling a screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110086646 DE102011086646B4 (en) | 2011-11-18 | 2011-11-18 | Screen and method for controlling a screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102011086646A1 DE102011086646A1 (en) | 2013-05-23 |
| DE102011086646B4 true DE102011086646B4 (en) | 2013-06-27 |
Family
ID=48221844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE201110086646 Expired - Fee Related DE102011086646B4 (en) | 2011-11-18 | 2011-11-18 | Screen and method for controlling a screen |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102011086646B4 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3127843A1 (en) * | 1981-07-15 | 1983-05-26 | AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang | METHOD FOR PREVENTING "COMPROMISING RADIATION" IN PROCESSING AND TRANSMITTING SECRET DATA INFORMATION |
| US5165098A (en) * | 1988-07-05 | 1992-11-17 | System Sikkerhet A/S | System for protecting digital equipment against remote access |
| DE19526124C2 (en) * | 1995-07-19 | 1997-06-26 | Sennheiser Electronic | Establishment with active noise compensation |
| EP0708474B1 (en) * | 1994-10-19 | 2000-09-06 | Hitachi, Ltd. | Cathode-ray tube display unit in which unwanted radiant electric field from face plate of cathode-ray tube is decreased |
| DE10056192A1 (en) * | 2000-11-13 | 2002-05-29 | Erhard Moeller | Superimposition transmitter for protecting against reception/decoding of compromising PCs/monitor emissions emits signal restricted to compromising emission carrier spectral range |
-
2011
- 2011-11-18 DE DE201110086646 patent/DE102011086646B4/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3127843A1 (en) * | 1981-07-15 | 1983-05-26 | AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang | METHOD FOR PREVENTING "COMPROMISING RADIATION" IN PROCESSING AND TRANSMITTING SECRET DATA INFORMATION |
| US5165098A (en) * | 1988-07-05 | 1992-11-17 | System Sikkerhet A/S | System for protecting digital equipment against remote access |
| EP0708474B1 (en) * | 1994-10-19 | 2000-09-06 | Hitachi, Ltd. | Cathode-ray tube display unit in which unwanted radiant electric field from face plate of cathode-ray tube is decreased |
| DE19526124C2 (en) * | 1995-07-19 | 1997-06-26 | Sennheiser Electronic | Establishment with active noise compensation |
| DE10056192A1 (en) * | 2000-11-13 | 2002-05-29 | Erhard Moeller | Superimposition transmitter for protecting against reception/decoding of compromising PCs/monitor emissions emits signal restricted to compromising emission carrier spectral range |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011086646A1 (en) | 2013-05-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R012 | Request for examination validly filed | ||
| R016 | Response to examination communication | ||
| R018 | Grant decision by examination section/examining division | ||
| R020 | Patent grant now final |
Effective date: 20130928 |
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| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |