DE102006019965A1 - Liquid crystal display backlight`s residual service life determining method, involves determining actual residual service life of backlight from maximum control variable of control variables and operating hours of backlight - Google Patents
Liquid crystal display backlight`s residual service life determining method, involves determining actual residual service life of backlight from maximum control variable of control variables and operating hours of backlight Download PDFInfo
- Publication number
- DE102006019965A1 DE102006019965A1 DE200610019965 DE102006019965A DE102006019965A1 DE 102006019965 A1 DE102006019965 A1 DE 102006019965A1 DE 200610019965 DE200610019965 DE 200610019965 DE 102006019965 A DE102006019965 A DE 102006019965A DE 102006019965 A1 DE102006019965 A1 DE 102006019965A1
- Authority
- DE
- Germany
- Prior art keywords
- backlight
- service life
- residual service
- operating hours
- liquid crystal
- 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- Withdrawn
Links
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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- 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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
-
- 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
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Ermittlung der Restlebensdauer eines mit einer Backlight-Regeleinrichtung versehenen Backlights, wobei die Backlight-Regeleinrichtung eine von einem Backlight-Sensor erfasste Leuchtdichte des Backlights auf einen Sollwert einregelt.The The invention relates to a method for determining the residual life a backlight provided with a backlight controller, wherein the backlight controller detects one of a backlight sensor Luminance of the backlight adjusts to a setpoint.
Aus
der
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art anzugeben, durch welches eine Restlebensdauer eines Backlights einfach ermittelt werden kann.Of the The present invention is based on the object, a method specify the type mentioned by which a residual life a backlight can be detected easily.
Diese Aufgabe wird durch die im Anspruch 1 angegebenen Maßnahmen gelöst.These The object is achieved by the measures specified in claim 1 solved.
Die Erfindung geht von der Idee aus, zur Ermittlung der Restlebensdauer die Änderung der Stellgröße der Backlight-Regel einrichtung auszuwerten. Aufgrund der Alterung des Backlights und der sich dadurch ergebenden Änderung des Istwertes muss die aktuelle Stellgröße erhöht werden, um diesen Istwert auf den vorgegebenen Sollwert einzuregeln. Während des Betriebs des Backlights werden sowohl die Stellgrößen als auch die Betriebsstunden des Backlights aufgezeichnet. Aus diesen aufgezeichneten bzw. „mitgeloggten" Stellgrößen, aus den Betriebsstunden und aus einer maximal möglichen Stellgröße der Backlight-Regeleinrichtung wird die Restlebensdauer des Backlights berechnet.The Invention is based on the idea to determine the remaining life the change the manipulated variable of the backlight rule device evaluate. Due to the aging of the backlight and the resulting resulting change of the actual value, the current manipulated variable must be increased by this actual value to adjust to the specified setpoint. During operation of the backlight Both the manipulated variables and recorded the operating hours of the backlight. From these recorded or "logged-in" manipulated variables, off the operating hours and a maximum possible manipulated variable of the backlight control device the remaining life of the backlight is calculated.
In einer Ausgestaltung der Erfindung wird die Restlebensdauer auf einer LCD-Anzeige angezeigt, wodurch ein Benutzer z. B. mittels einer „On Screen Display Funktionalität" bei Bedarf über den Zustand des Backlights informiert wird.In An embodiment of the invention, the remaining life on a LCD display, allowing a user to B. by means of an "On Screen Display functionality "on demand over the Condition of the backlight is informed.
Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung veranschaulicht ist, werden im Folgenden die Erfindung, deren Ausgestaltungen sowie Vorteile näher erläutert.Based the drawing in which an embodiment The invention is illustrated below, the invention, their embodiments and advantages explained in more detail.
Es zeigen:It demonstrate:
Die
in den
In
Zur
Ermittlung einer Restlebensdauer des
Backlights
- Smax
- die maximal mögliche Stellgröße,
- die aufgrund einer Sollwertvorgabe zum Zeitpunkt t2 sich einstellende Stellgröße,
- eine aufgrund einer Sollwertvorgabe zu einem Zeitpunkt t1 sich einstellende Stellgröße,
- die erfassten Betriebsstunden bzw. die erfasste Betriebsdauer bis zum Zeitpunkt t2,
- die erfassten Betriebsstunden bzw. die erfasste Betriebsdauer bis zum Zeitpunkt t1
- S max
- the maximum possible manipulated variable,
- due to a setpoint specification at the time t 2 adjusting manipulated variable,
- one due to a setpoint specification at a time t 1 adjusting manipulated variable,
- the recorded operating hours or the recorded operating time until the time t 2 ,
- the recorded operating hours or the recorded operating time until the time t 1
Allgemein gilt für die Restlebensdauer zu verschiedenen Zeitpunkten ti, i = 0, 1, 2, ..., und für verschiedene Stellgrößen j = 1, 2, 3, ..., welche sich aufgrund von vorgebbaren Sollwerten einstellen, Generally applies to the remaining life at different times t i , i = 0, 1, 2, ..., and for different manipulated variables j = 1, 2, 3, ..., which are due to predefinable setpoints to adjust,
Im
Folgenden wird auf
Es wird angenommen, dass die maximal mögliche Stellgröße Smax = 250 beträgt und dass sich aufgrund des vorgegebenen Sollwertes die aktuellen Stellgrößen und aufgrund des vorgegebenen Sollwertes die aktuellen Stellgrößen einstellen, damit ein Istwert Iw auf den jeweiligen Sollwert und eingeregelt wird.It is assumed that the maximum possible manipulated variable S max = 250 and that due to the predetermined setpoint the current manipulated variables and due to the predetermined setpoint the current manipulated variables set, so that an actual value Iw to the respective setpoint and is adjusted.
Für den vorgegebenen
Sollwert (
Für den Fall,
dass anstatt eines Sollwertes der
geringere Sollwert (
Die
jeweilige Restlebensdauer des
Backlights
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610019965 DE102006019965A1 (en) | 2006-04-28 | 2006-04-28 | Liquid crystal display backlight`s residual service life determining method, involves determining actual residual service life of backlight from maximum control variable of control variables and operating hours of backlight |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610019965 DE102006019965A1 (en) | 2006-04-28 | 2006-04-28 | Liquid crystal display backlight`s residual service life determining method, involves determining actual residual service life of backlight from maximum control variable of control variables and operating hours of backlight |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006019965A1 true DE102006019965A1 (en) | 2007-11-08 |
Family
ID=38564727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200610019965 Withdrawn DE102006019965A1 (en) | 2006-04-28 | 2006-04-28 | Liquid crystal display backlight`s residual service life determining method, involves determining actual residual service life of backlight from maximum control variable of control variables and operating hours of backlight |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006019965A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08152862A (en) * | 1994-11-29 | 1996-06-11 | Sanyo Electric Co Ltd | Device for informing of exchange time of back light for liquid crystal display |
DE19905690B4 (en) * | 1998-02-17 | 2006-01-12 | Lg Electronics Inc. | Apparatus and method for displaying the backlight consumption time for LCD monitors |
-
2006
- 2006-04-28 DE DE200610019965 patent/DE102006019965A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08152862A (en) * | 1994-11-29 | 1996-06-11 | Sanyo Electric Co Ltd | Device for informing of exchange time of back light for liquid crystal display |
DE19905690B4 (en) * | 1998-02-17 | 2006-01-12 | Lg Electronics Inc. | Apparatus and method for displaying the backlight consumption time for LCD monitors |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: EIZO GMBH, 76187 KARLSRUHE, DE |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20121101 |