DE10345779A1 - Multicolor LED background lighting system for LCD control keys uses multi wavelength LED devices - Google Patents

Multicolor LED background lighting system for LCD control keys uses multi wavelength LED devices Download PDF

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Publication number
DE10345779A1
DE10345779A1 DE10345779A DE10345779A DE10345779A1 DE 10345779 A1 DE10345779 A1 DE 10345779A1 DE 10345779 A DE10345779 A DE 10345779A DE 10345779 A DE10345779 A DE 10345779A DE 10345779 A1 DE10345779 A1 DE 10345779A1
Authority
DE
Germany
Prior art keywords
leds
lighting system
control keys
background lighting
lcd control
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Withdrawn
Application number
DE10345779A
Other languages
German (de)
Inventor
Uwe P. Wettin
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.)
LCD SOLUTION Sarl
LCD-SOLUTION Sarl
Original Assignee
LCD SOLUTION Sarl
LCD-SOLUTION Sarl
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 LCD SOLUTION Sarl, LCD-SOLUTION Sarl filed Critical LCD SOLUTION Sarl
Priority to DE20315188U priority Critical patent/DE20315188U1/en
Priority to DE10345779A priority patent/DE10345779A1/en
Publication of DE10345779A1 publication Critical patent/DE10345779A1/en
Withdrawn legal-status Critical Current

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
    • G09G3/3413—Details of control of colour illumination sources
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • 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
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/014—LED
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/039—Selective or different modes of illumination
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks

Abstract

The background lighting system for use with illuminated control keys uses LED devices having more than two different wavelengths. The selection of wavelengths for different lighting effects is controlled by an integrated circuit providing adapt stream output.

Description

Bekannte Hinterleuchtungssysteme von LCD-Tastenschaltern, beschrieben in EP0463285 und US5134505 , haben die Light emitting Diode (LED)-Anschlüsse separat herausgeführt. Bei dieser Lösung ist es nachteilig, daß die Ansteuerung der LEDs durch eine separate Elektronik realisiert wird. Alternativ existiert die Integration von Stromausgängen in die Integrierte Schaltung, die die Ansteuerung des Liquid Cristal Displays (LCD)s übernimmt, wie bei dem LCD-Tastenschalter Marke „ScreenKeys", FR2555511 . Die darin beschriebene Verbesserung besteht darin, daß der externe Aufwand verringert wird. Nachteilig ist jedoch, daß diese Lösung nur LEDs mit 2 unterschiedlichen Wellenlängen (1, 2) ansteuert. Eine Mischung der beiden Wellenlängen ergibt weitere Hinterleuchtungsfarben (4), die im Commission Internationale d'Eclairage (CIE)-Farbsystem alle auf der Linie zwischen den beiden eingesetzen LED-Wellenlängen liegen. Beispielsweise ergeben rote und grüne LEDs die Mischfarbe orange.Known backlight systems of LCD key switches, described in EP0463285 and US5134505 , the light emitting diode (LED) connections have led out separately. In this solution, it is disadvantageous that the control of the LEDs is realized by a separate electronics. Alternatively, there is the integration of current outputs in the integrated circuit, which takes over the control of the Liquid Cristal Display (LCD) s, as with the LCD key switch brand "ScreenKeys", FR2555511 , The improvement described therein is that the external effort is reduced. The disadvantage, however, is that this solution only drives LEDs with 2 different wavelengths (1, 2). A mixture of the two wavelengths yields further backlight colors (4), which are all in the Commission International d'Eclairage (CIE) color system on the line between the two set LED wavelengths. For example, red and green LEDs make the mixed color orange.

Der Erfindung liegt daher das Problem zugrunde, einen grösseren Farben-Bereich im CIE Farbsystem abzudecken, um mehr Hinterleuchtungsfarben verfürbar zu machen.Of the The invention is therefore based on the problem of a larger color range in the CIE color system cover to make more backlight colors available.

Dieses Problem wird durch die in Patentanspruch 1 aufgeführten Merkmale gelöst. Die mit der Erfindung erzielten Vorteile liegen insbesondere darin, dass damit eine Vielzahl von unterschiedlichen Hinterleuchtungsfarben, die über weite Bereiche des CIE Farbsystems verteilt sind, eingestellt werden können.This Problem is solved by the features listed in claim 1 solved. The advantages achieved by the invention are, in particular, that a variety of different backlight colors, the above wide areas of the CIE color system are distributed, can be adjusted.

1 zeigt den CIE Farbraum, in dem die Positionen der LEDs (1) für rot, (2) für grün und (3) für blau eingezeichnet sind. Bisherige Lösungen können nur Farben zwischen (1) und (2) erzeugen, beispielsweise (4). Durch Einsatz der zusätzlichen LED (3) können Hinterleuchtungen im gesamten Bereich (5) eingestellt werden. Nicht möglich sind Farben im Bereich (6). Durch die Auswahl der Wellenlänge der 3 LEDs, oder durch Hinzufügen von LEDs mit weiteren Wellenlängen kann der Bereich (5) vergrössert werden. 1 shows the CIE color space in which the positions of the LEDs ( 1 ) for red, ( 2 ) for green and ( 3 ) are drawn for blue. Previous solutions can only color between ( 1 ) and ( 2 ), for example ( 4 ). By using the additional LED ( 3 ) can provide backlighting throughout ( 5 ). Not possible are colors in the range ( 6 ). By selecting the wavelength of the 3 LEDs, or by adding LEDs with further wavelengths, the range ( 5 ) are enlarged.

Claims (1)

Hinterleuchtungssystem zur Erzeugung einer variablen Hinterleuchtungsfarbe für eine LCD-Taste bestehend aus LEDs, – wobei die Hinterleuchtungsfarben durch die einstellbare Leuchtstärke der 3 oder mehreren LEDs im System erzeugt werden, – wobei mehrere LEDs mit mindestens 3 unterschiedlichen Wellenlängen eingesetzt sind, – wobei die Ansteuerung der LEDs über einen integrierten Schaltkreis erfolgt, – wobei dieser Schaltkreis seriell oder parallel angesteuert wird, – wobei mehr als eine LED gleichzeitig angesteuert werden kann, – wobei die Helligkeit der LEDs in mindestens zwei Helligkeitsstufen einstellbar ist.Backlight system for generating a variable Backlight color for an LCD button consisting of LEDs, - where the backlight colors by the adjustable luminosity the 3 or more LEDs are generated in the system, - in which several LEDs with at least 3 different wavelengths used are, - in which the control of the LEDs via an integrated circuit takes place, - where this circuit is controlled in series or in parallel, - where more than one LED at the same time can be controlled - in which the brightness of the LEDs can be set in at least two brightness levels is.
DE10345779A 2003-09-29 2003-09-29 Multicolor LED background lighting system for LCD control keys uses multi wavelength LED devices Withdrawn DE10345779A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE20315188U DE20315188U1 (en) 2003-09-29 2003-09-29 Multi-colored LED backlighting system for LCD buttons
DE10345779A DE10345779A1 (en) 2003-09-29 2003-09-29 Multicolor LED background lighting system for LCD control keys uses multi wavelength LED devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20315188U DE20315188U1 (en) 2003-09-29 2003-09-29 Multi-colored LED backlighting system for LCD buttons
DE10345779A DE10345779A1 (en) 2003-09-29 2003-09-29 Multicolor LED background lighting system for LCD control keys uses multi wavelength LED devices

Publications (1)

Publication Number Publication Date
DE10345779A1 true DE10345779A1 (en) 2005-04-14

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DE20315188U Expired - Lifetime DE20315188U1 (en) 2003-09-29 2003-09-29 Multi-colored LED backlighting system for LCD buttons
DE10345779A Withdrawn DE10345779A1 (en) 2003-09-29 2003-09-29 Multicolor LED background lighting system for LCD control keys uses multi wavelength LED devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE20315188U Expired - Lifetime DE20315188U1 (en) 2003-09-29 2003-09-29 Multi-colored LED backlighting system for LCD buttons

Country Status (1)

Country Link
DE (2) DE20315188U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7586274B2 (en) 2007-11-09 2009-09-08 The Coca-Cola Company LED light output linearization

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7586274B2 (en) 2007-11-09 2009-09-08 The Coca-Cola Company LED light output linearization
US8013541B2 (en) 2007-11-09 2011-09-06 The Coca-Cola Company LED light output linearization

Also Published As

Publication number Publication date
DE20315188U1 (en) 2004-05-13

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8139 Disposal/non-payment of the annual fee