DE102021213490A1 - Narrow display backlighting - Google Patents
Narrow display backlighting Download PDFInfo
- Publication number
- DE102021213490A1 DE102021213490A1 DE102021213490.4A DE102021213490A DE102021213490A1 DE 102021213490 A1 DE102021213490 A1 DE 102021213490A1 DE 102021213490 A DE102021213490 A DE 102021213490A DE 102021213490 A1 DE102021213490 A1 DE 102021213490A1
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- DE
- Germany
- Prior art keywords
- display
- lighting circuit
- light sources
- circuit board
- lighting
- 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.)
- Pending
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- 238000005286 illumination Methods 0.000 description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
Images
Classifications
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- 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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133613—Direct backlight characterized by the sequence of light sources
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
Die Erfindung betrifft eine Beleuchtungseinheit, aufweisend ein durchleuchtbares Display (1) und eine Beleuchtungsleiterplatte (2), auf der Lichtquellen (4) angeordnet sind. Dabei ist zumindest eine weitere Beleuchtungsleiterplatte (3) vorhanden, und die Anzahl von Lichtquellen (4) pro Flächeneinheit von zumindest zwei der Beleuchtungsleiterplatten (2,3) weichen voneinander ab.The invention relates to a lighting unit having a translucent display (1) and a lighting circuit board (2) on which light sources (4) are arranged. At least one further lighting circuit board (3) is present, and the number of light sources (4) per unit area of at least two of the lighting circuit boards (2, 3) differ from one another.
Description
Die vorliegende Erfindung betrifft eine schmale Display-Hinterleuchtung. Insbesondere bei Anzeigen, die nicht selbstleuchtend sind, wie beispielsweise Flüssigkristallanzeigen (LCD, Liquid Crystal Display), wird eine Hinterleuchtung der Anzeige, also des Displays, benötigt.The present invention relates to a narrow display backlight. Particularly in the case of displays that are not self-luminous, such as liquid crystal displays (LCD, Liquid Crystal Display), backlighting of the display, ie the display, is required.
Bei mittels LED (Leuchtdiode, Light Emitting Diode) hinterleuchteten Displays gibt es die Technik der flächigen LED-Anordnung. Dabei sind LEDs auf einer Fläche in einer Ebene angeordnet. Die wichtigsten Parameter für eine gleichmäßige Ausleuchtung sind: Der LED-Abstand zum Display. Ein großer Abstand bedeutet eine große Homogenität, ein kleiner Abstand bedeutet eine geringere Homogenität. Die LED-Anzahl pro Fläche. Eine große Anzahl bedeutet eine große Homogenität, eine kleine Anzahl bedeutet eine geringere Homogenität.In the case of displays backlit by means of LEDs (light emitting diodes, light emitting diodes), there is the technology of the flat LED arrangement. In this case, LEDs are arranged on a surface in one plane. The most important parameters for an even illumination are: The LED distance to the display. A large distance means high homogeneity, a small distance means lower homogeneity. The number of LEDs per face. A large number means high homogeneity, a small number means less homogeneity.
Insbesondere Automobilhersteller fordern für Displays flache Bauformen mit hoher Homogenität der Ausleuchtung zu geringen Preisen. Somit wird eine hohe Anzahl von LEDs benötigt, die entsprechend Kosten verursachen.Car manufacturers in particular are demanding flat designs for displays with high homogeneity of illumination at low prices. A large number of LEDs are therefore required, which result in corresponding costs.
Die
Bei Fahrzeugleuchten ist es bekannt, LED-Modulen auf unterschiedlichen Ebenen anzuordnen. Allerdings weisen diese Fahrzeugleuchten eine stark gekrümmte Form auf. Hierbei geht es also nicht primär um die Homogenität der Ausleuchtung, weshalb auch keine Anpassung des Rastermaßes erfolgt.In the case of vehicle lights, it is known to arrange LED modules on different levels. However, these vehicle lights have a strongly curved shape. It is not primarily about the homogeneity of the illumination, which is why the grid size is not adjusted.
Bei Fahrzeugleuchten sind mehrere LED-Module auf mehreren Ebenen räumlich angeordnet. Dabei sind je LED-Modul die LEDs auf einer ebenen oder gekrümmten Fläche, zum Beispiel auf einer flexiblen Leiterplatte, angeordnet. Diese Fläche entspricht einer annähernd parallelen Fläche zu Fahrzeugleuchtengeometrie mit annähernd gleichem Abstand. Stand der Technik ist es somit, eine gleichmäßige Ausleuchtung durch einen konstanten LED-Abstand für „LED zu LED“ und „LED zu Display“ zu bekommen.In vehicle lights, several LED modules are spatially arranged on several levels. The LEDs for each LED module are arranged on a flat or curved surface, for example on a flexible printed circuit board. This area corresponds to an area that is approximately parallel to the geometry of the vehicle lights and is approximately the same distance away. It is therefore state of the art to achieve uniform illumination through a constant LED distance for "LED to LED" and "LED to display".
Die Erfindung zielt darauf ab, die hohe Anzahl der LEDs und somit die hohen Kosten zu reduzieren.The invention aims to reduce the high number of LEDs and thus the high costs.
Eine erfindungsgemäße Beleuchtungseinheit weist ein durchleuchtbares Display auf und eine Beleuchtungsleiterplatte, auf der Lichtquellen, beispielsweise LEDs, angeordnet sind, wobei zumindest eine weitere Beleuchtungsleiterplatte vorhanden ist, und die Anzahl von Lichtquellen pro Flächeneinheit von zumindest zwei der Beleuchtungsleiterplatten voneinander abweicht.A lighting unit according to the invention has a translucent display and a lighting circuit board on which light sources, for example LEDs, are arranged, with at least one further lighting circuit board being present and the number of light sources per unit area of at least two of the lighting circuit boards differing from one another.
Vorteilhafterweise sind die Beleuchtungsleiterplatten parallel zueinander angeordnet. Diese Bauweise läßt sich kostengünstig herstellen und bietet sich insbesondere bei ebenen Displays an.The lighting circuit boards are advantageously arranged parallel to one another. This type of construction can be produced inexpensively and is particularly suitable for flat displays.
Vorteilhaft weisen die Ebenen von zumindest zwei der Beleuchtungsleiterplatten einen Winkel α größer 0° zueinander auf. Dies bietet sich insbesondere bei gekrümmten Displays an. Damit kann der Krümmung des Displays gefolgt werden, und gleichzeitig die erforderliche Bauhöhe klein gehalten werden.Advantageously, the planes of at least two of the lighting circuit boards have an angle α greater than 0° to one another. This is particularly useful for curved displays. This means that the curvature of the display can be followed, and at the same time the required overall height can be kept small.
Erfindungsgemäß werden die LEDs vorzugsweise auf mehreren Ebenen angeordnet.According to the invention, the LEDs are preferably arranged on several levels.
In Bereichen, in denen eine schmale Bauform des Gerätes gefordert wird, werden die LEDs dichter und näher zum Display plaziert. In Bereichen, in denen mehr Bauraum zur Verfügung steht, werden die LEDs weiter weg vom Display und mit größerem Abstand zueinander plaziert.In areas where a slim design of the device is required, the LEDs are placed more densely and closer to the display. In areas where more installation space is available, the LEDs are placed further away from the display and at a greater distance from one another.
Die Beleuchtung wird erfindungsgemäß kostenoptimiert auf mehrere Ebenen aufgeteilt. Die Anzahl der LEDs pro Fläche ist somit zielgerichtet skalierbar.According to the invention, the lighting is divided into several levels in a cost-optimized manner. The number of LEDs per area can therefore be scaled in a targeted manner.
Die Erfindung kann bei allen Displays mit flächiger LED-Anordnung eingesetzt werden, beispielsweise für Computer-Monitore oder Fernsehgeräte.The invention can be used in all displays with a flat LED arrangement, for example for computer monitors or television sets.
Die Erfindung wird im folgenden anhand von Abbildungen näher beschrieben. Dabei zeigen:
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1 Displayhinterleuchtung gemäß Stand der Technik -
2 Displayhinterleuchtung gemäß Stand der Technik -
3 Displayhinterleuchtung gemäß Stand der Technik -
4 Displayhinterleuchtung gemäß Stand der Technik -
5 Displayhinterleuchtung gemäß Stand der Technik -
6 Displayhinterleuchtung gemäß Erfindung -
7 Displayhinterleuchtung gemäß Erfindung
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1 State-of-the-art display backlighting -
2 State-of-the-art display backlighting -
3 State-of-the-art display backlighting -
4 State-of-the-art display backlighting -
5 State-of-the-art display backlighting -
6 Display backlighting according to the invention -
7 Display backlighting according to the invention
Andere Kombinationen einzelner Merkmale liegen ebenfalls im Rahmen der Offenbarung, auch wenn sie hier nicht im einzelnen angeführt sind.Other combinations of individual features are also within the scope of the disclosure, even if they are not listed in detail here.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDED IN DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturPatent Literature Cited
- EP 1992871 A2 [0004]EP 1992871 A2 [0004]
Claims (3)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021200742 | 2021-01-27 | ||
DE102021200742.2 | 2021-01-27 | ||
DE102021202777 | 2021-03-23 | ||
DE102021202777.6 | 2021-03-23 |
Publications (1)
Publication Number | Publication Date |
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DE102021213490A1 true DE102021213490A1 (en) | 2022-07-28 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102021213490.4A Pending DE102021213490A1 (en) | 2021-01-27 | 2021-11-30 | Narrow display backlighting |
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DE (1) | DE102021213490A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1992871A2 (en) | 2007-05-15 | 2008-11-19 | Samsung Electro-mechanics Co., Ltd | Plane light source and LCD backlight unit having the same |
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2021
- 2021-11-30 DE DE102021213490.4A patent/DE102021213490A1/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1992871A2 (en) | 2007-05-15 | 2008-11-19 | Samsung Electro-mechanics Co., Ltd | Plane light source and LCD backlight unit having the same |
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R081 | Change of applicant/patentee |
Owner name: CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH, DE Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE |
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R081 | Change of applicant/patentee |
Owner name: CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH, DE Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH, 30165 HANNOVER, DE |