EP0930603A2 - Vorrichtung zur Vermeidung einer Überhitzung eines Displaytreiber-Bausteins einer Plasmaanzeige - Google Patents
Vorrichtung zur Vermeidung einer Überhitzung eines Displaytreiber-Bausteins einer Plasmaanzeige Download PDFInfo
- Publication number
- EP0930603A2 EP0930603A2 EP98124634A EP98124634A EP0930603A2 EP 0930603 A2 EP0930603 A2 EP 0930603A2 EP 98124634 A EP98124634 A EP 98124634A EP 98124634 A EP98124634 A EP 98124634A EP 0930603 A2 EP0930603 A2 EP 0930603A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- display
- image
- signal
- control signal
- display driver
- 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.)
- Granted
Links
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Classifications
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
-
- 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
- G09G2330/04—Display protection
- G09G2330/045—Protection against panel overheating
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
Definitions
- the invention relates to a device for avoiding overheating a display driver module of a plasma display, which Display driver module has several display driver elements, from each of which is an image area of the image to be shown on the display is assigned, with a measuring unit for generating a measuring signal, which contains information about the power consumption of the display, one connected on the output side to the measuring unit Control signal generating unit for generating a control signal, and a circuit acted upon by the control signal to reduce the Brightness of the image signals shown on the display.
- Plasma displays are known in which the power consumption of the Total displays measured and a reduction in the brightness of the on the Displayed image signals occur when the measured Power exceeds a predetermined threshold.
- the display driver module provided to control the display has several display driver elements working in parallel. Any of these Display driver elements is based on a predetermined number of image lines assigned to the plasma display. For example, a display driver module a total of 6 display driver elements, each of which 80 of the 480 lines of a frame are assigned.
- the object of the invention based on showing a way, as well as individual display driver elements of the display driver module is protected against overheating can be.
- the device shown has an input E, via which the Device a video signal is supplied.
- This video and / or Image signal is from the video signal path of an image source, such as TV receiver or PC derived, which with a plasma display 1 is provided on which images corresponding to the video signal are shown become.
- an image source such as TV receiver or PC derived
- plasma display 1 is provided on which images corresponding to the video signal are shown become.
- Such plasma displays have a high power consumption Because of their measures are necessary, with the help of overheating of the display is avoided.
- the control signal generation unit evaluates to generate this control signal 2 signals from you from a temperature sensor 3 and from a total of six integrators 4a, ..., 4f are supplied.
- the Temperature sensor 3 is arranged in the area of the display 1 and for Measurement of the temperature prevailing in the area of the display 1 intended.
- the integrators 4a, ..., 4f are connected to the output of an Controllable amplifier 5 arranged in the video signal path via an A / D converter 6 and a digital signal processing circuit 7 connected.
- the input of the controllable amplifier 5 is that at the input E Device applied signal supplied.
- An output signal of the digital Signal processing circuit 7 is via a display driver module 8 fed to the plasma display.
- the display driver module 8 has a total of six display driver elements on. Each of these six display driver elements is 80 lines of to be displayed full screen, which has a total of 480 lines having.
- the display driver element 1 is lines 1-80, lines 81-160, the display driver element 2, the display driver element 3 lines 161-240, display driver element 4 lines 241-320, lines 321-400 and display driver element 5 Display driver element 6 assigned to lines 401-480.
- the digital signal processing circuit 7 includes, among others Image storage circuit and an interpolation circuit, by means of which the input signal delivered according to the PAL standard, which 625 Lines per frame, is converted into a 480-line signal, such as it is provided for display on the plasma display 1.
- the control signal ST1 is fed to the control input of the amplifier 5.
- the control signal ST2 is applied to the display driver module 8.
- the temperature sensor 3 becomes Provided signal with predetermined temperature threshold values compared, which are for example at 70 ° C, 80 ° C and 90 ° C by one temperature-dependent reduction in the brightness of the on-screen shown image.
- each of these Integrators 4a, ..., 4f are assigned 80 lines of the video signal, so that Integrator 4a the video content transmitted in lines 1-80, the integrator 4b the video content transmitted in lines 81-160, the integrator 4c in lines 161-240 transmitted video content, the integrator 4d the in the Lines 241-320 transmitted video content, the integrator 4e that in the lines 321-400 transmitted video content and the integrator 4f in the lines 401-480 transmitted video content is fed.
- the video signal is evaluated in the With regard to the light and dark components contained therein.
- the in the frame of these integration processes signal values are the Control signal generation unit 2 supplied and in this each with a predetermined threshold value compared. Such an evaluation results over a predetermined time interval that the one belonging to an integrator Output signal this predetermined threshold in more than 90% of the Exceeds cases, then this leads to an excessive burden on the each associated display driver element in the display driver module 8 conclude.
- control signal generating unit 2 To overheat and destroy this display driver element prevent, the control signal generating unit 2 generates in this case a control signal ST1 and / or ST2, on the basis of which the gain of Amplifier 5 is reduced or the display driver module 8 is driven, to the brightness of the video signal shown on the display 1 to reduce. This means a reduction in the load on all six in the Display driver module 8 provided display driver elements.
- This Control signal generation for reducing the brightness takes place when present an excessive load on one of the display driver elements then when the signals derived from the temperature sensor 3 are not yet on cause the entire display to overheat.
- the Video signal processing circuit 7 provided digital signal into a signal suitable for driving the plasma display 1 converted.
- the digital image signal is timed in divided several part-time intervals, during which depending on the each present brightness value corresponds to the brightness value Number of voltage pulses for display control is generated.
- Such a procedure is, for example, the one already mentioned above DE-A- (Köchel) of the applicant and the status of the Technology described.
- the above reduction in brightness on the display shown image signals occurs in the display driver module 8, that the number of one in one or more part-time intervals Frame period of the video signal generates digital voltage pulses is reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of Gas Discharge Display Tubes (AREA)
Abstract
Description
Claims (7)
- Vorrichtung zur Vermeidung einer Überhitzung eines Displaytreiber-Bausteins eines Plasmadisplays, welcher Displaytreiber-Baustein mehrere Displaytreiber-Elemente aufweist, von denen jedes einem Bildbereich des auf dem Display darzustellenden Bildes zugeordnet ist, miteiner Meßeinheit zur Erzeugung eines Meßsignals, welches eine Information über die Leistungsaufnahme des Displays enthält,einer ausgangsseitig mit der Meßeinheit verbundenen Steuersignalerzeugungseinheit zur Erzeugung eines Steuersignals, undeiner vom Steuersignal beaufschlagten Schaltung zur Reduzierung der Helligkeit der auf dem Display dargestellten Bildsignale,
dadurch gekennzeichnet,
daß die Steuersignalerzeugungseinheit (2) zur Ermittlung eines bildbereichsweisen Meßsignals des darzustellenden Bildes vorgesehen ist und ein die Helligkeit der auf dem Display dargestellten Signale reduzierendes Steuersignal (ST1, ST2) dann erzeugt, wenn das einem Bildbereich zugehörige Meßsignal einen vorgegebenen Schwellenwert übersteigt. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Meßeinheit mehrere parallel zueinander angeordnete Integratoren (4a,...,4f) aufweist, die jeweils einem Bildbereich zugeordnet sind, und die jeweils ausgangsseitig mit der Steuersignalerzeugungseinheit (2) verbunden sind. - Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet,
daß sie eine Bildspeichermittel aufweisende Bildsignalverarbeitungssschaltung (7) aufweist, die ausgangsseitig mit den Integratoren (4a,...,4f) verbunden ist. - Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet,
daß die Bildsignalverarbeitungsschaltung (7) einen Interpolator aufweist. - Vorrichtung nach einem der Ansprüche 3 oder 4,
dadurch gekennzeichnet,
daß die Bildsignalverarbeitungsschaltung (7) zur Umwandlung eines beliebigen Eingangssignals in eine zur Darstellung des Signals auf einem geeignete Form vorgesehen ist. - Vorrichtung nach einem der Ansprüche 3 bis 5,
dadurch gekennzeichnet,
daß die Bildsignalverarbeitungsschaltung (7) zur Umwandlung der Zeilenzahl eines PAL-Eingangssignals in eine zur Darstellung des Signals auf einem Plasmadisplay geeignete Zeilenzahl vorgesehen ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die Schaltung zur Reduzierung der Helligkeit der auf dem Display dargestellten Bildsignale in Abhängigkeit vom Steuersignal die Anzahl der in einem oder mehreren Teilzeitintervallen einer Vollbildperiode des Bildsignals erzeugten digitalen Spannungsimpulse reduziert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19800846 | 1998-01-13 | ||
DE19800846A DE19800846C2 (de) | 1998-01-13 | 1998-01-13 | Vorrichtung zur Vermeidung einer Überhitzung eines Displaytreiber-Bausteins eines Plasmadisplays |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0930603A2 true EP0930603A2 (de) | 1999-07-21 |
EP0930603A3 EP0930603A3 (de) | 1999-12-15 |
EP0930603B1 EP0930603B1 (de) | 2004-04-21 |
Family
ID=7854404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98124634A Expired - Lifetime EP0930603B1 (de) | 1998-01-13 | 1998-12-23 | Vorrichtung zur Vermeidung einer Überhitzung eines Displaytreiber-Bausteins einer Plasmaanzeige |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0930603B1 (de) |
DE (2) | DE19800846C2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1136975A1 (de) * | 1999-10-04 | 2001-09-26 | Matsushita Electric Industrial Co., Ltd. | Anzeigenvorrichtung und verfahren zur steuerung ihrer helligkeit |
EP1500993A2 (de) * | 2003-06-26 | 2005-01-26 | Grundig Multimedia B.V. | Elektrotechnisches Gerät mit einer Vorrichtung zur Bewertung des Einflusses von Betriebsparametern auf die Lebensdauer |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19925725B4 (de) * | 1999-06-07 | 2005-06-09 | Grundig Multimedia B.V. | Vorrichtung zur Kühlung eines Displays |
DE102019204124A1 (de) * | 2019-03-26 | 2020-10-01 | Robert Bosch Gmbh | Temperaturabhängiges Betreiben eines Bildschirms |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5329288A (en) * | 1991-09-28 | 1994-07-12 | Samsung Electron Devices Co., Ltd. | Flat-panel display device |
EP0653740A2 (de) * | 1993-11-17 | 1995-05-17 | Fujitsu Limited | Graustufensteuerung für Plasma-Anzeigevorrichtungen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3140069B2 (ja) * | 1991-02-12 | 2001-03-05 | パイオニア株式会社 | 表示装置 |
JPH0865607A (ja) * | 1994-08-19 | 1996-03-08 | Fujitsu General Ltd | プラズマディスプレイ装置 |
JPH08251515A (ja) * | 1995-03-09 | 1996-09-27 | Fujitsu General Ltd | 表示器の焼付防止方法 |
-
1998
- 1998-01-13 DE DE19800846A patent/DE19800846C2/de not_active Expired - Fee Related
- 1998-12-23 DE DE59811237T patent/DE59811237D1/de not_active Expired - Lifetime
- 1998-12-23 EP EP98124634A patent/EP0930603B1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5329288A (en) * | 1991-09-28 | 1994-07-12 | Samsung Electron Devices Co., Ltd. | Flat-panel display device |
EP0653740A2 (de) * | 1993-11-17 | 1995-05-17 | Fujitsu Limited | Graustufensteuerung für Plasma-Anzeigevorrichtungen |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 199, no. 607, 31. Juli 1996 (1996-07-31) & JP 08 065607 A (FUJITSU GENERAL LTD.) * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1136975A1 (de) * | 1999-10-04 | 2001-09-26 | Matsushita Electric Industrial Co., Ltd. | Anzeigenvorrichtung und verfahren zur steuerung ihrer helligkeit |
EP1162595A2 (de) * | 1999-10-04 | 2001-12-12 | Matsushita Electric Industrial Co., Ltd. | Anzeigevorrichtung und Verfahren zur Luminanzsteuerung dafür |
EP1168290A2 (de) * | 1999-10-04 | 2002-01-02 | Matsushita Electric Industrial Co., Ltd. | Anzeigevorrichtung und Verfahren zur Luminanzsteuerung dafür |
EP1136975A4 (de) * | 1999-10-04 | 2003-02-26 | Matsushita Electric Ind Co Ltd | Anzeigenvorrichtung und verfahren zur steuerung ihrer helligkeit |
USRE39711E1 (en) | 1999-10-04 | 2007-07-03 | Matsushita Electric Industrial Co., Ltd. | Display device and luminance control method therefor |
USRE39741E1 (en) | 1999-10-04 | 2007-07-24 | Matsushita Electric Industrial Co., Ltd. | Display device and luminance control method therefor |
USRE39742E1 (en) | 1999-10-04 | 2007-07-24 | Matsushita Electric Industrial Co., Ltd. | Display device and luminance control method therefor |
USRE39740E1 (en) | 1999-10-04 | 2007-07-24 | Matsushita Electric Industrial Co., Ltd. | Display device and method of controlling its brightness |
EP1500993A2 (de) * | 2003-06-26 | 2005-01-26 | Grundig Multimedia B.V. | Elektrotechnisches Gerät mit einer Vorrichtung zur Bewertung des Einflusses von Betriebsparametern auf die Lebensdauer |
EP1500993A3 (de) * | 2003-06-26 | 2006-12-06 | Grundig Multimedia B.V. | Elektrotechnisches Gerät mit einer Vorrichtung zur Bewertung des Einflusses von Betriebsparametern auf die Lebensdauer |
Also Published As
Publication number | Publication date |
---|---|
DE59811237D1 (de) | 2004-05-27 |
DE19800846C2 (de) | 1999-12-09 |
EP0930603A3 (de) | 1999-12-15 |
DE19800846A1 (de) | 1999-07-22 |
EP0930603B1 (de) | 2004-04-21 |
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