EP0971259A1 - Anordnung zur Hinterleuchtung von LCD-Anzeigen - Google Patents
Anordnung zur Hinterleuchtung von LCD-Anzeigen Download PDFInfo
- Publication number
- EP0971259A1 EP0971259A1 EP99250197A EP99250197A EP0971259A1 EP 0971259 A1 EP0971259 A1 EP 0971259A1 EP 99250197 A EP99250197 A EP 99250197A EP 99250197 A EP99250197 A EP 99250197A EP 0971259 A1 EP0971259 A1 EP 0971259A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- led field
- dimensions
- arrangement
- arrangement according
- fluorescent lamp
- 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
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
Definitions
- the invention relates to an arrangement for backlighting LCD displays (liquid crystal display) using LED (light-emitting Diode), especially in public information systems Passenger transport.
- the fluorescent lamps have a relatively short lifespan, so that their failure or their unreliable before the failure Ignition or the blackening of the fluorescent lamp ends often leads to display quality problems.
- the object of the invention is an arrangement for backlighting of LCD displays using LED to develop with the existing one Displays backlit with illuminants such as fluorescent lamps can be retrofitted without converting existing electrical systems can.
- Fig. 1 shows the rear view of an adapter electronics 3, which is provided with contact pins 4, which in the existing Snap the sockets of the fluorescent lamp (not shown) and there contact electrically so that existing fluorescent lamps can be easily exchanged for an LED field 1 (Fig. 2) can.
- the LED field 1 is connected to the adapter electronics 3 in such a way that when plugged together into the existing electrical Connections all over and parallel behind the one to be backlit LCD display (not shown) is arranged.
- the electrical pins 4 of the adapter electronics 3 are optionally Arranged rotated by 90 ° when it is in the installation position the original fluorescent lamp required makes.
- the one arranged on the back of the flat, block-shaped LED field 1 Matching electronics 3 is used to adapt to the existing Voltages and connection values of the originally available Fluorescent lamp.
- the LEDs 2 are yellow in color to match the LCD display selected and operated in one operating point, which represents an optimum between the lifespan and the brightness.
- the dimensions width and length of the LED field 1 are the LCD display area so precisely adjusted that the LCD display area evenly illuminated in the corners.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal Display Device Control (AREA)
- Planar Illumination Modules (AREA)
Abstract
Die Aufgabe der Erfindung, eine Anordnung zur Hinterleuchtung von LCD-Anzeigen mittels LED zu entwickeln, mit der vorhandene mit Leuchtmitteln wie Leuchtstofflampen hinterleuchtete Anzeigen ohne Umbau von vorhandenen elektrischen Anlagen umgerüstet werden können, wird dadurch gelöst, daß ein LED-Feld 1 mit den mechanischen Anschlußmaßen und den elektrischen Anschlußwerten des bisher verwendeten Leuchtmittels mit einer elektronischen Anpassungsschaltung 3 gekoppelt ist und anstelle des bisherigen Leuchtmittels, vorzugsweise eine Leuchtstofflampe, in dessen Fassung über elektrische Kontaktstifte 4 eingesetzt ist.
Description
- Fig. 1 :
- die schematische Rückansicht der Anpaßelektronik und
- Fig. 2 :
- die schematische Seitenansicht eines LED-Feldes mit der Anpaßelektronik nach Fig. 1.
- 1
- LED-Feld
- 2
- Leuchtdiode
- 3
- Anpaßelektronik
- 4
- Kontaktstift
Claims (5)
- Anordnung zur Hinterleuchtung von LCD-Anzeigen mittels LED,
dadurch gekennzeichnet,
daß ein LED-Feld (1) mit den mechanischen Anschlußmaßen und den elektrischen Anschlußwerten des bisher verwendeten Leuchtmittels mit einer elektronischen Anpassungsschaltung (3) gekoppelt und anstelle des bisherigen Leuchtmittels eingesetzt ist. - Anordnung nach Anspruch 1,
dadurch gekennzeichnet,
daß das LED-Feld (1) mit den mechanischen Anschlußmaßen und den elektrischen Anschlußwerten einer bisher verwendeten Leuchtstofflampe eben und blockförmig ausgebildet ist und auf der Rückseite die elektronische Anpassungsschaltung (3) aufweist, die über elektrische Kontaktstifte (4) in die Fassung der bisher verwendeten Leuchtstofflampe eingebracht ist. - Anordnung nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet,
daß die Farbe der Leuchtdioden (2) des LED-Feldes (1) an die Farbe der LCD-Anzeige angepaßt ist. - Anordnung nach den Ansprüchen 1 bis 3,
dadurch gekennzeichnet,
daß die Abmessungen des LED-Feldes (1) den Abmessungen der LCD-Anzeigefläche genau angepaßt sind. - Anordnung nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß die Leuchtdioden (2) des LED-Feldes (1)in einem Betriebspunkt betrieben werden, der ein Optimum zwischen der Helligkeit und der Lebensdauer darstellt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29812962U | 1998-07-10 | ||
DE29812962U DE29812962U1 (de) | 1998-07-10 | 1998-07-10 | Anordnung zur Hinterleuchtung von LCD-Anzeigen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0971259A1 true EP0971259A1 (de) | 2000-01-12 |
EP0971259B1 EP0971259B1 (de) | 2009-12-16 |
Family
ID=8060163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99250197A Expired - Lifetime EP0971259B1 (de) | 1998-07-10 | 1999-06-19 | Anordnung zur Hinterleuchtung von LCD-Anzeigen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0971259B1 (de) |
AT (1) | ATE452351T1 (de) |
DE (2) | DE29812962U1 (de) |
NO (1) | NO316682B1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007015440B3 (de) * | 2007-03-30 | 2008-02-21 | Horst Groos | Leuchtmittelträger zum Einsetzen in Stiftaufnahmen für Leuchtstoffröhre einer Niederdruckgasentladungslampe |
DE202007004719U1 (de) | 2007-03-30 | 2008-08-14 | Groos, Horst | Leuchtmittelträger zum Einsetzen in Stiftaufnahmen für Leuchtstoffröhre einer Niederdruckgasentladungslampe |
DE102006003045B4 (de) * | 2006-01-20 | 2013-10-02 | Simon-Boris Estermann | Leuchtmitteleinheit, insbesondere für den Einsatz in Outdoor-Beleuchtungsvorrichtungen |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3869195A (en) | 1973-07-02 | 1975-03-04 | Itek Corp | Liquid crystal display containing segmented source of back-lighting |
US5008658A (en) | 1986-12-09 | 1991-04-16 | Zenith Electronics Corporation | Domed light housing for back-lit LCD display |
US5388357A (en) | 1993-04-08 | 1995-02-14 | Computer Power Inc. | Kit using led units for retrofitting illuminated signs |
US5760858A (en) | 1995-04-21 | 1998-06-02 | Texas Instruments Incorporated | Field emission device panel backlight for liquid crystal displays |
-
1998
- 1998-07-10 DE DE29812962U patent/DE29812962U1/de not_active Expired - Lifetime
-
1999
- 1999-06-19 DE DE59915112T patent/DE59915112D1/de not_active Expired - Lifetime
- 1999-06-19 AT AT99250197T patent/ATE452351T1/de not_active IP Right Cessation
- 1999-06-19 EP EP99250197A patent/EP0971259B1/de not_active Expired - Lifetime
- 1999-07-07 NO NO19993362A patent/NO316682B1/no not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3869195A (en) | 1973-07-02 | 1975-03-04 | Itek Corp | Liquid crystal display containing segmented source of back-lighting |
US5008658A (en) | 1986-12-09 | 1991-04-16 | Zenith Electronics Corporation | Domed light housing for back-lit LCD display |
US5388357A (en) | 1993-04-08 | 1995-02-14 | Computer Power Inc. | Kit using led units for retrofitting illuminated signs |
US5760858A (en) | 1995-04-21 | 1998-06-02 | Texas Instruments Incorporated | Field emission device panel backlight for liquid crystal displays |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006003045B4 (de) * | 2006-01-20 | 2013-10-02 | Simon-Boris Estermann | Leuchtmitteleinheit, insbesondere für den Einsatz in Outdoor-Beleuchtungsvorrichtungen |
DE102007015440B3 (de) * | 2007-03-30 | 2008-02-21 | Horst Groos | Leuchtmittelträger zum Einsetzen in Stiftaufnahmen für Leuchtstoffröhre einer Niederdruckgasentladungslampe |
DE202007004719U1 (de) | 2007-03-30 | 2008-08-14 | Groos, Horst | Leuchtmittelträger zum Einsetzen in Stiftaufnahmen für Leuchtstoffröhre einer Niederdruckgasentladungslampe |
Also Published As
Publication number | Publication date |
---|---|
EP0971259B1 (de) | 2009-12-16 |
NO316682B1 (no) | 2004-04-05 |
DE29812962U1 (de) | 1999-08-12 |
NO993362D0 (no) | 1999-07-07 |
DE59915112D1 (de) | 2010-01-28 |
NO993362L (no) | 2000-01-11 |
ATE452351T1 (de) | 2010-01-15 |
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