DE202010003621U1 - lighting unit - Google Patents

Abstract

Lighting unit (1) comprising
(A) a transparent support plate (2) having a first surface (3) which is at least partially coated with at least one opaque layer (4);
(b) a housing (5) disposed on the first surface (3) of the transparent support plate (2), the inner surface (6) of which can at least partially reflect light rays (23); and
(C) at least one in a space (16) between the housing (5) and the first surface (3) of the transparent support plate (2) arranged light source (7), wherein the light source (7) generated light rays (23) at least partially in the transparent carrier plate (2) can pass;
characterized in that at least a part of the inner surface (6) comprises a diffusely reflecting surface (8).

Description

• (a) eine transparente Trägerplatte mit einer ersten Oberfläche, die mindestens teilweise mit mindestens einer lichtundurchlässigen Schicht beschichtet ist;
• (b) ein auf der ersten Oberfläche der Trägerplatte angeordnetes Gehäuse, dessen innere Oberfläche mindestens teilweise Lichtstrahlen reflektieren kann; und
• (c) mindestens ein in einem Raum zwischen dem Gehäuse und der ersten Oberfläche der transparenten Trägerplatte angeordnetes Leuchtmittel, wobei vom Leuchtmittel erzeugte Lichtstrahlen mindestens teilweise in die transparente Trägerplatte gelangen können.

The invention relates to a lighting unit comprising

• (a) a transparent support plate having a first surface at least partially coated with at least one opaque layer;
• (b) a housing disposed on the first surface of the carrier plate, the inner surface of which can at least partially reflect light rays; and
• (C) at least one arranged in a space between the housing and the first surface of the transparent support plate lamp, wherein light rays generated by the light source can at least partially reach the transparent support plate.

lighting units The type mentioned above are known.

That's how it describes EP 0 354 468 A1 a planar radiator with a transparent mounting plate having a Leitbahnstruktur on which a plurality of luminescent semiconductor body in communication with the interconnect structure is fixed in a planar distribution and each semiconductor body is surrounded by a reflector, which emitted from the semiconductor body, occurring on the reflector Light component reflected by the mounting plate. In a preferred embodiment, the mounting plate with semiconductor bodies mounted thereon is immersed in a plastic potting compound such that each semiconductor body is located at the focal point of the preferably parabolic plastic body. On the cured potting compound, a highly reflective material is then applied. In accordance with the function of a planar radiator, the entire reflected radiation is bundled in parallel due to the parabolic shape of the reflector, so that the greatest possible light intensity is obtained. The spotlight can be used, for example, as a vehicle light, signal light, marker lamp or in traffic lights.

A rear automotive brake light, in which LEDs are embedded in a plastic mass, which in turn is surrounded by a reflector, is in the US-A-5,241,457 described.

In the DE 10 2007 017 335 A1 a lighting unit is described with a transparent support plate which is provided on one side with electrical conductors and a plurality of components and at least one light emitting diode through which light can be emitted parallel to the support plate. On the lighting unit sits a cover part with a reflector element, which is deflected by the light emitting diode parallel to the support plate radiated light in the transparent support plate. The light-emitting diode is a side LED, which is embedded in a plastic layer.

The DE 198 54 899 C1 describes a lighting unit consisting of a transparent support plate provided on one side with electrically conductive structures, and surface mountable light emitting diodes having terminals on either side of a light emitting side facing with their terminals in contact with the conductive structures and with the light emitting side of the support plate these are mounted.

this hitherto known radiators or lighting units is common, the light coming from a semiconductive light source (LED), d. H. Beams of light, by means of a side or around the bulb around oriented reflector more or less directly areally in a transparent pane, for example made of glass or transparent Plastic, is passed.

adversely this is because a consuming calculated reflector technique necessary is and the bulb is visible. Basically exists always an indirect lighting. This is particularly disadvantageous if a spotlight or a lighting unit as a display for Representation of labels, symbols or drawings used shall be.

task The invention therefore was to provide a lighting unit, in which these disadvantages are eliminated. Especially should such a lighting unit suitable as a display, with a variety of labels, symbols and / or drawings in a manner that is advantageous or pleasant for a user can be represented.

The Solution of this problem is achieved according to this invention by a lighting unit with the characteristics of the independent Protection claim. Preferred embodiments of the invention Lighting unit are in corresponding dependent protection claims listed.

• (a) eine transparente Trägerplatte mit einer ersten Oberfläche, die mindestens teilweise mit mindestens einer lichtundurchlässigen Schicht beschichtet ist;
• (b) ein auf der ersten Oberfläche der Trägerplatte angeordnetes Gehäuse, dessen innere Oberfläche mindestens teilweise Lichtstrahlen reflektieren kann; und
• (c) mindestens ein in einem Raum zwischen dem Gehäuse und der ersten Oberfläche der transparenten Trägerplatte angeordnetes Leuchtmittel, wobei vom Leuchtmittel erzeugte Lichtstrahlen mindestens teilweise in die transparente Trägerplatte gelangen können;

wobei mindestens ein Teil der inneren Oberfläche eine diffus reflektierende Oberfläche umfasst.The invention thus relates to a lighting unit comprising

• (a) a transparent support plate having a first surface at least partially coated with at least one opaque layer;
• (b) a housing disposed on the first surface of the carrier plate, the inner surface of which can at least partially reflect light rays; and
• (c) at least one in a space between the housing and the first surface of the transpa Arranged support plate mounted light source, wherein light rays generated by the light source can at least partially reach the transparent support plate;

wherein at least a part of the inner surface comprises a diffusely reflecting surface.

Of the As used herein, "carrier plate" to interpret broadly. The transparent carrier plate (hereinafter also abbreviated as "carrier plate") can be rigid or flexible and have different thicknesses. A suitable rigid support plate is generally made of glass or a plastic such. As polycarbonate or polymethylmethacrylate. In the other extreme case of a flexible carrier plate can for example, a flexible polyethylene terephthalate or foil.

As well is the term "transparent" as used herein in the widest sense "translucent" to interpret.

The Lighting unit according to the invention can next the carrier plate containing a second plate, also can be configured as a support plate. As material for the second plate is already suitable for the carrier plate known materials.

According to the invention not excluded that also a third plate and more plates be used. Preferably, however, it is still highest used a second plate.

Provided a second plate is used, this is generally on the first surface of the transparent support plate opposite side.

Between the carrier plate and the second plate can there are more layers and / or films. One or more For example, films can be placed between the carrier plate and the second plate inserted or fixed to the carrier plate and / or be connected to the second plate.

support plate and second plate are preferably made of glass, in particular of float glass.

In a particularly preferred embodiment, the inventive Lighting unit next to the support plate a second Plate as well as spacers on, passing through the spacers desired distance between the carrier plate and the second plate is adjustable. In this embodiment can advantageously a possibly labels, etc. having film inserted between the carrier plate and the second plate become.

The Illuminant is not limited according to the invention and comprises all the light sources used in the invention Lighting unit can be used. These include, for example Incandescent lamps, gas discharge lamps (low-pressure and high-pressure gas discharge lamps), Light-emitting diodes (inorganic / organic), induction lamps and condenser luminescent films. Preference is given to bulbs with a large radiation angle.

invention Fair Preferably, light-emitting diodes and capacitor light-emitting foils are used.

It Both inorganic light-emitting diodes and organic Light emitting diodes are used. The light-emitting diodes can present as top LEDs or as side LEDs. Because of the larger radiation angle are preferably used top LEDs.

It can the known inorganic light emitting diode materials be used.

About that In addition, organic light emitting diodes can be used. Organic light-emitting diodes generally use small organic ones Molecules (SM-OLEDs) or organic polymers (PLEDs).

SM-OLEDs include, for example, organometallic chelates and conjugated Dendrimers.

PLEDs include electrically conductive polymers such as. Polythiophene, Polypyrroles, polyfluorenes and poly (p-phenylenevinylenes), which may be may be suitably substituted. Preferred substituents are alkyl and alkoxy groups.

Of the Advantage of PLEDs is the ability to make these as flexible Films, for example, by electropolymerization of the corresponding Monomers, spincoats or printing (screen printing) of the polymers on a Apply support plate, wherein the carrier plate can be rigid or flexible. In addition, the power requirement relatively low for the PLEDs.

Capacitor luminescent films, which are also referred to as electroluminescent films, arranged between two electrodes, one of which must be transparent, a layer of an electroluminescent material. The electroluminescent material may be, for example, zinc sulfide or a II-VI compound semiconductor doped with, for example, gold, copper, silver, gallium or manganese. In the capacitor luminescent film, the electroluminescent material is electrically separated from the electrodes by an insulating material. This can be achieved by using an insulating layer or by embedding particles of the electroluminescent material in an insulating matrix. The transparent electrode is, for example, an In diumzinnoxid electrode.

All According to the invention, LEDs are particularly preferred used.

in the Generally, these bulbs are combined with other resources used, which are required for the operation of the lamps (z. As switches, ballast, ignitor, Dimmer, starter, current limiting device). These are the specialist known, so that is not discussed here in detail.

The Illuminant can on the carrier plate, possibly mediated by a coating applied to the carrier plate, or attached to the housing. in both cases if necessary also spacers (struts) be attached.

The at least one opaque layer comprises in General electrical conductors and components, in particular used to control and power the bulb become.

The has diffuse reflecting surface, relative to the inner Surface of the housing, preferably a share of at least 30%, more preferably at least 50%, and most preferably a share of more than 90%.

The diffusely reflecting surface of the inner surface The case can be made by using a special material for the housing and / or a special treatment the inner surface of the housing can be achieved. Alternatively, it is also a partial or complete coating the inner surface of the housing with a diffusely reflecting material possible. The surface can be, for example, highly reflective white, made of silver, Be chrome or titanium, or matt diffuse reflective.

In a preferred embodiment of the invention the diffusely reflecting surface is a fluorine-containing one Polymer or an inorganic material or consists of this. The inorganic material preferably comprises barium sulfate and / or Gold. The fluorine-containing polymer is, for example, polytetrafluoroethylene (PTFE).

Diffuse Reflective surfaces are generally relative relatively rough to the wavelength of the light used, but they can also be polished.

If This is generally referred to as diffuse reflection a diffuse reflection of light in a wavelength range from 200 to 900 nm. The visible range is preferred of the spectrum used. It may be useful to use one diffuse reflective surface to a desired Tune wavelength range.

In a preferred embodiment of the invention Lighting unit is the first surface of the carrier plate at least partially with a reflective layer which is on they incident light, d. H. Light rays, the light source diffuse or directly, preferably diffusely, reflect. These Reflective layer herein differs from the diffuse one reflective part of the inner surface of the housing, which may also be designed as a diffusely reflecting coating may also be referred to as a "second reflective layer" can be as a separate layer on the opaque Layer be formed or at least partially replace it.

In the lighting unit according to the invention can light produced by the light source at least partially, preferably but as much as possible, in the transparent Get carrier plate. For this purpose, the coating of the first surface of the carrier plate with an opaque layer at least one recess or a transparent part.

In this recess or this transparent part can opaque symbols, numbers or letters attached which, due to the diffusely reflected light passing through the carrier plate passes, highlighted and so on Viewers can be shown. The opaque Symbols, numbers or letters can also be on one the first surface of the support plate opposite second surface of the support plate or in it be arranged integrated.

Furthermore can turn off the symbols, numbers or letters themselves a luminous material, such as an organic LED (OLED) or a capacitor luminescent film. In that case, would the diffusely reflected light from the housing provides backlighting represent.

On this way are many different lighting effects achievable.

In the lighting unit according to the invention preferably from the lamp parallel to the carrier plate radiated light rays from the inner surface of the Housing reflected in the interior of the housing and not deflected into the carrier plate.

In a particularly preferred embodiment, the lighting unit additionally comprises a sensor system. The sensor system may include one or more sensors that are under can be based on different sensor principles, eg. B. thermal sensors, light sensors and capacitive sensors.

hereby it is possible that the lighting unit then turned on when, for example, the proximity of the sensor system of a person is displayed. For example, if used a light sensor by a low incidence of light in a just opened room the lighting unit turned on become. Or if there is a movement in this room.

This is particularly advantageous if the lighting unit to display information.

In a preferred embodiment of the invention is therefore at least part of an opaque layer in the form of symbols, numbers and / or letters, when irradiated with light through recesses or transparent Parts highlighted in the opaque layer become.

The Housing used in the lighting unit is in terms of Size, shape and material not particularly limited. The housing can also be closed or to be open.

Preferably The housing includes materials that use the light do not absorb but reflect, eg. B. housing a highly reflective plastic or highly reflective metal, or consists of this.

Of the Interior of the housing can be filled with a gas, such. For example, air be filled, or with a plastic mass. In general is an LED already partially in a plastic mass, so for example, between one located in a plastic mass LED and the housing is a gas atmosphere.

The Shape of the case can be very diverse. Possible For example, square shapes such as cuboid or Pyramid or round shapes such. B. hemisphere or housing with an elliptical or parabolic cross section.

There the shape of the case influences the diffuse reflection has, taking into account the shape of the case the diffusely reflecting inner surface, in particular their size and arrangement, selected be, and vice versa.

in the Space between the housing and the first surface the transparent support plate can be on or be arranged a plurality of bulbs.

In front This background is another aspect of the present invention the use of the illumination unit described above as a display.

• (a) eine transparente Trägerplatte mit einer ersten Oberfläche, die mindestens teilweise mit mindestens einer lichtundurchlässigen Schicht beschichtet ist;
• (b) ein auf der ersten Oberfläche der Trägerplatte angeordnetes Gehäuse, dessen innere Oberfläche mindestens teilweise Licht reflektieren kann; und
• (c) mindestens ein in einem Raum zwischen dem Gehäuse und der ersten Oberfläche der transparenten Trägerplatte angeordnetes Leuchtmittel, wobei vom Leuchtmittel erzeugte Lichtstrahlen mindestens teilweise in die transparente Trägerplatte gelangen können,

wobei mindestens ein Teil der inneren Oberfläche eine diffus reflektierende Oberfläche umfasst, und wobei

• (i) eine transparente Trägerplatte mit einer ersten Oberfläche mindestens teilweise mit mindestens einer lichtundurchlässigen Schicht beschichtet wird;
• (ii) auf der ersten Oberfläche der transparenten Trägerplatte ein Gehäuse angebracht wird, dessen innere Oberfläche mindestens teilweise Lichtstrahlen reflektieren kann und mindestens ein Teil der inneren Oberfläche eine diffus reflektierende Oberfläche umfasst;
• (iii) in einem Raum zwischen dem Gehäuse und der ersten Oberfläche der transparenten Trägerplatte ein Leuchtmittel angebracht wird, und
• (iv) mindestens ein Teil der ersten Oberfläche nicht beschichtet oder mit einem transparenten Material beschichtet wird, so dass vom Leuchtmittel erzeugte Lichtstrahlen mindestens teilweise in die transparente Trägerplatte gelangen können.

The illumination unit according to the invention can be produced by a method comprising

• (a) a transparent support plate having a first surface at least partially coated with at least one opaque layer;
• (b) a housing disposed on the first surface of the support plate, the inner surface of which can at least partially reflect light; and
• (c) at least one illuminant arranged in a space between the housing and the first surface of the transparent support plate, wherein light rays generated by the illuminant can at least partially enter the transparent support plate,

wherein at least a part of the inner surface comprises a diffusely reflecting surface, and wherein

• (i) a transparent support plate having a first surface at least partially coated with at least one opaque layer;
• (ii) mounting on the first surface of the transparent support plate a housing, the inner surface of which may at least partially reflect light rays, and at least a portion of the inner surface comprises a diffusely reflecting surface;
• (iii) a lamp is mounted in a space between the housing and the first surface of the transparent support plate, and
• (iv) at least a part of the first surface is not coated or coated with a transparent material, so that light rays generated by the light source can at least partially pass into the transparent support plate.

The different opaque or transparent layers including traces and reflective layers can be advantageously applied by screen printing.

The invention has numerous advantages. The lighting unit according to the invention allows a low construction height, low installation costs, in addition, no special lighting is required. In addition, it is environmentally friendly and advantageously allows a modern product design. In embodiments of the invention be the illuminant is in the invisible area. A shadow effect by other components such. B. resistors or capacitors can be avoided. Moreover, the realization of disappearance effects in "Black in Black" or "White in White" is also possible. There are no restrictions on the possible colors. Finally, function-dependent colors and device states can be displayed in the illumination unit according to the invention via RGB.

The invention is explained in more detail below with reference to non-limiting embodiments, wherein the 1 to 5 Reference is made.

1 shows a sectional view through a first embodiment of a lighting unit according to the invention.

2 shows a sectional view through a second embodiment of a lighting unit according to the invention.

3 shows a sectional view through a third embodiment of a lighting unit according to the invention.

4 shows a display according to the invention, which contains a lighting unit according to the invention.

5 shows a sectional view through a fourth embodiment of a lighting unit according to the invention.

1 shows a sectional view through a first embodiment of a lighting unit according to the invention 1 , The lighting unit 1 includes a transparent support plate 2 , here made of glass, with a first surface 3 partially coated with at least one opaque layer 4 is coated. On the first surface 3 the transparent support plate 2 , in particular on a light-impermeable layer applied thereto 4 is a housing 5 arranged, at least part of its inner surface 6 a diffuse reflecting surface 8th having.

At the in 1 shown first embodiment is a lighting means 7 so in a room 16 between the case 5 and the first surface 3 the transparent support plate 2 arranged that it is on the first surface 3 the transparent plate 2 located. In addition, the housing forms 5 a closed structure, leaving housing 5 and transparent carrier plate 2 to form a closed space.

From the bulb 7 generated light can through recesses or a transparent coating on the transparent support plate 2 at least partially in the transparent support plate 2 reach. The space between the bulb 7 and the housing 3 is filled with air.

The housing 5 has a hemispherical shape, wherein at least a part of the inner surface 6 of housing 5 as a first reflective surface, a diffusely reflecting surface 8th includes, referring to the inner surface here 6 of the housing 5 has a share of at least 90%. The diffusely reflecting surface 8th consists here of a highly diffusely reflecting polytetrafluoroethylene.

The at least one opaque layer 4 includes electrical conductors 9 and components 10 ,

Moreover, at the in 1 shown first embodiment of the illumination unit according to the invention, the first surface 3 the carrier plate 2 at least partially with a second reflective layer 11 , Which light incident on the bulb 7 diffuse or reflect directly.

From the bulb parallel to the carrier plate 2 radiated light is in the embodiment shown here between parts of the inner surface 6 of the housing 5 reflected and not immediately in the carrier plate 2 directed.

The lighting unit 1 additionally includes a sensor system 12 , The light source 7 here includes inorganic LEDs.

The lighting unit of the 1 is suitable for a display, because at least a part 13 the opaque layer 4 is in the form of symbols, numbers and / or letters 13 designed.

The layers 4 and 11 as well as the symbols, numbers and / or letters 13 are applied here in the form of a paste by means of screen printing.

2 shows a sectional view through a second embodiment of a lighting unit according to the invention 1 , The second embodiment shown here differs from that in FIG 1 shown first embodiment in that the housing 5 has the shape of a hemisphere. Otherwise, the same reference numerals have the same meaning here as for 1 ,

3 shows a sectional view through a third embodiment of a lighting unit according to the invention. The third embodiment shown here differs from that in FIG 2 ge showed second embodiment in that the light source 7 not here on the support plate but not shown here supports on the housing 5 is attached. Otherwise, the same reference numerals have the same meaning here as for 1 ,

4 shows a display according to the invention, which contains a lighting unit according to the invention. In the form of opaque symbols, numbers and / or letters 13 Here, the indication "ON" is shown, which is located in a recess or a transparent coating on the transparent support plate 2 located. 4 means an opaque layer. 12 here means a sensor system, which allows that in the presence of a user - automatically or after a measure of the user - the display is turned on with the illumination unit according to the invention. For this still necessary components and conductors are in 4 Not shown.

5 shows a fourth embodiment of a lighting unit according to the invention, in which in addition to the transparent support plate, a second plate is present. Transparent carrier plate and second plate consist of glass here.

At the in 5 shown fourth embodiment is located between the transparent support plate 2 and the second plate 17 a through spacer 18 realized gap 22 , In the gap 22 there is a slide 19 which has, for example, labels for explaining symbols in a display. A thickness of the film and a width of the gap are chosen so that a secure attachment of the film is ensured in the gap. On the transparent support plate 2 facing side of the second plate 17 is a second opaque layer 20 applied. The second opaque layer 20 was prepared by applying a black paste by screen printing and then baking the paste. The second opaque layer 20 has second transparent recesses 21 on. The arrangement of the transparent recesses 21 is matched to the film, in particular a label of the film, so that the film or a label located thereon in the region of these recesses for a left of the lighting unit 1 located - not shown here - viewer is recognizable.

The transparent carrier plate 2 is on a first surface 3 at least partially with an opaque layer 4 Coated by recesses or transparent coatings 14 is interrupted. In the fourth embodiment shown here are in the region of the recesses or transparent coatings 14 Symbols, numbers and / or letters 13 arranged from an opaque material, the one - not shown here - viewer with the help of diffused light through the support plate 2 is blasted, made visible. 12 means a capacitive sensor.

1

lighting unit

2

transparent support plate

3

First surface

4

opaque layer

5

casing

6

Inner surface

7

Lamp

8th

Diffuse reflective surface

9

electrical conductor tracks

10

electrical components

11

Second reflective layer

12

sensor system

13

symbols, Numbers and / or letters

14

recess or transparent coating

15

display

16

room between housing and first surface

17

Second plate

18

spacer

19

(Labeled) foil

20

Second opaque layer

21

Second transparent recesses in the opaque layer

22

gap

23

light rays (Light)

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0354468 A1 [0003]
• - US 5241457 A [0004]
• - DE 102007017335 A1 [0005]
• - DE 19854899 C1 [0006]

Claims (11)

Lighting unit ( 1 ) comprising (a) a transparent support plate ( 2 ) with a first surface ( 3 ), which at least partially with at least one opaque layer ( 4 ) is coated; (b) one on the first surface ( 3 ) of the transparent support plate ( 2 ) arranged housing ( 5 ), whose inner surface ( 6 ) at least partially light rays ( 23 ) can reflect; and (c) at least one in a room ( 16 ) between the housing ( 5 ) and the first surface ( 3 ) of the transparent support plate ( 2 ) arranged bulbs ( 7 ), whereby the light source ( 7 ) generated light beams ( 23 ) at least partially into the transparent support plate ( 2 ) can get; characterized in that at least a part of the inner surface ( 6 ) a diffusely reflecting surface ( 8th ). Lighting unit ( 1 ) according to claim 1, characterized in that the at least one opaque layer ( 4 ) electrical conductors ( 9 ) and components ( 10 ). Lighting unit ( 1 ) according to claim 1 or 2, characterized in that the diffusely reflecting surface ( 8th ), relative to the inner surface ( 6 ) of the housing ( 5 ), has a share of at least 30%. Lighting unit ( 1 ) according to one of claims 1 to 3, characterized in that the diffusely reflecting surface ( 8th ) comprises or consists of a fluorine-containing polymer or an inorganic material. Lighting unit ( 1 ) according to claim 4, characterized in that the inorganic material comprises barium sulfate and / or gold. Lighting unit ( 1 ) according to one of claims 1 to 5, characterized in that the first surface ( 3 ) of the carrier plate ( 2 ) at least partially with a second reflective layer ( 11 ), which light rays ( 23 ) of the illuminant ( 7 ) can diffuse or reflect directly, is provided. Lighting unit ( 1 ) according to one of claims 1 to 6, characterized in that the lamp ( 7 ) parallel to the carrier plate ( 2 ) radiated light beams ( 23 ) between parts of the inner surface ( 6 ) of the housing ( 5 ) and not immediately into the transparent support plate ( 2 ). Lighting unit ( 1 ) according to one of claims 1 to 7, characterized in that it additionally comprises a sensor system ( 12 ). Lighting unit ( 1 ) according to one of claims 1 to 8, characterized in that the lighting means ( 7 ) comprises inorganic or organic LEDs. Lighting unit ( 1 ) according to one of claims 1 to 9, characterized in that at least one part ( 13 ) an opaque layer ( 4 ) in the form of symbols, numbers and / or letters ( 13 ) is configured. Lighting unit ( 1 ) according to one of claims 1 to 10, characterized in that the housing ( 5 ) comprises or consists of a highly reflective plastic or a highly reflective metal.