EP0930603A2 - Dispositif pour éviter la surchauffe des composants de commande d'un dispositif d'affichage à plasma - Google Patents

Dispositif pour éviter la surchauffe des composants de commande d'un dispositif d'affichage à plasma Download PDF

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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
Application number
EP98124634A
Other languages
German (de)
English (en)
Other versions
EP0930603A3 (fr
EP0930603B1 (fr
Inventor
Matthias Grundig AG Köchel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grundig Multimedia BV
Original Assignee
Grundig AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Grundig AG filed Critical Grundig AG
Publication of EP0930603A2 publication Critical patent/EP0930603A2/fr
Publication of EP0930603A3 publication Critical patent/EP0930603A3/fr
Application granted granted Critical
Publication of EP0930603B1 publication Critical patent/EP0930603B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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)
EP98124634A 1998-01-13 1998-12-23 Dispositif pour éviter la surchauffe des composants de commande d'un dispositif d'affichage à plasma Expired - Lifetime EP0930603B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19800846A DE19800846C2 (de) 1998-01-13 1998-01-13 Vorrichtung zur Vermeidung einer Überhitzung eines Displaytreiber-Bausteins eines Plasmadisplays
DE19800846 1998-01-13

Publications (3)

Publication Number Publication Date
EP0930603A2 true EP0930603A2 (fr) 1999-07-21
EP0930603A3 EP0930603A3 (fr) 1999-12-15
EP0930603B1 EP0930603B1 (fr) 2004-04-21

Family

ID=7854404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98124634A Expired - Lifetime EP0930603B1 (fr) 1998-01-13 1998-12-23 Dispositif pour éviter la surchauffe des composants de commande d'un dispositif d'affichage à plasma

Country Status (2)

Country Link
EP (1) EP0930603B1 (fr)
DE (2) DE19800846C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136975A1 (fr) * 1999-10-04 2001-09-26 Matsushita Electric Industrial Co., Ltd. Dispositif d'affichage et procede pour regler sa luminosite
EP1500993A2 (fr) * 2003-06-26 2005-01-26 Grundig Multimedia B.V. Appareil électrotechnique avec installation pour évaluer l'influence des paramètres d'opération sur la durée de vie

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 (fr) * 1993-11-17 1995-05-17 Fujitsu Limited Commande d'échelle de gris pour des dispositifs d'affichage à plasma

Family Cites Families (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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 (fr) * 1993-11-17 1995-05-17 Fujitsu Limited Commande d'échelle de gris pour des dispositifs d'affichage à plasma

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136975A1 (fr) * 1999-10-04 2001-09-26 Matsushita Electric Industrial Co., Ltd. Dispositif d'affichage et procede pour regler sa luminosite
EP1162595A2 (fr) * 1999-10-04 2001-12-12 Matsushita Electric Industrial Co., Ltd. Dispositif d'affichage et sa méthode de commande de luminance
EP1168290A2 (fr) * 1999-10-04 2002-01-02 Matsushita Electric Industrial Co., Ltd. Dispositif d'affichage et sa méthode de commande de luminance
EP1136975A4 (fr) * 1999-10-04 2003-02-26 Matsushita Electric Ind Co Ltd Dispositif d'affichage et procede pour regler sa luminosite
USRE39711E1 (en) 1999-10-04 2007-07-03 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
USRE39742E1 (en) 1999-10-04 2007-07-24 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
EP1500993A2 (fr) * 2003-06-26 2005-01-26 Grundig Multimedia B.V. Appareil électrotechnique avec installation pour évaluer l'influence des paramètres d'opération sur la durée de vie
EP1500993A3 (fr) * 2003-06-26 2006-12-06 Grundig Multimedia B.V. Appareil électrotechnique avec installation pour évaluer l'influence des paramètres d'opération sur la durée de vie

Also Published As

Publication number Publication date
DE19800846C2 (de) 1999-12-09
DE59811237D1 (de) 2004-05-27
EP0930603A3 (fr) 1999-12-15
DE19800846A1 (de) 1999-07-22
EP0930603B1 (fr) 2004-04-21

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