CN112140989A

CN112140989A - Light guide element for a lighting device

Info

Publication number: CN112140989A
Application number: CN202010587730.1A
Authority: CN
Inventors: G.福利德曼; K.E.霍瓦特; K.瓦尔加-乌伯里奇
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2019-06-28
Filing date: 2020-06-24
Publication date: 2020-12-29
Anticipated expiration: 2040-06-24
Also published as: FR3097818B1; CN112140989B; DE102019209504A1; FR3097818A1

Abstract

The invention relates to a light-guiding element (30) for a lighting device (100), in particular for an operating device (22), wherein the light-guiding element (30) is at least partially made of a light-transmitting material. The light-guiding element (30) has at least one light incoupling surface (34, 46, 80, 82) configured for coupling the light beam (112) into the light-guiding element (30) and at least one light outcoupling surface (40, 50) configured for coupling the light beam (112) out of the light-guiding element (30). Furthermore, the light-guiding element (30) has an axis (32) passing through the midpoint of the light-guiding element (30). Furthermore, a first spacing (38) between the at least one light incoupling surface (34, 46, 80, 82) and the axis (32) is greater than a second spacing (44) between the at least one light outcoupling surface (40, 50) and the axis (32).

Description

Light guide element for a lighting device

Technical Field

The invention relates to a light guide element for a lighting device of the type according to the independent claim. Furthermore, the use of illumination devices, operating devices and light-guiding elements is also the subject of the present invention.

Background

A system for illuminating an adjusting knob of an input device by means of transmitted light is known from document EP 1162636B 1.

Disclosure of Invention

A light-guiding element for a lighting device, in particular for an operating device, is proposed, wherein the light-guiding element is at least partially composed of a light-transmitting material. The light-guiding member has at least one light incoupling surface configured for incoupling a light beam into the light-guiding member and a light outcoupling surface configured for outcoupling a light beam out of the light-guiding member. Furthermore, the light guiding element has an axis passing through a midpoint of the light guiding element, wherein a first spacing between the at least one light incoupling surface and the axis is larger than a second spacing between the at least one light outcoupling surface and the axis.

The light guiding element may be configured to further guide the light beam. In particular, the light beam is further conducted from the light incoupling surface to the light outcoupling surface and is guided out of the light guiding element by means of the light outcoupling surface. The lighting device can be designed in particular for lighting devices, for example operating devices. The operating device can be designed, for example, for being operated by an operator and thus receiving instructions, as a result of which, in particular, corresponding actions can be triggered. The operating device can be arranged, for example, in the vehicle, for example, in the dashboard and/or in the center console. Thus, the vehicle occupant can operate a specific device in the vehicle and/or trigger a specific action by means of the operating device. For example, a display device, an air conditioner, and a navigation system may be operated. By means of the operating device, specific functions in the vehicle can also be controlled.

The advantage of the invention is that a uniform illumination can be ensured or guaranteed by means of the light-guiding element. In other words, it can be ensured that the light beam can achieve uniform illumination. By means of the light-guiding element, the coupled-in light beam, in particular of this type, can be scattered in the light-guiding element and in particular reflected at least once, so that a homogeneous illumination can be achieved. Furthermore, the installation space can be optimally utilized by means of the light-guiding element. By means of the light-guiding element, a homogeneous illumination with the element can be ensured, whereby special expenditure, for example costs or installation space, for further elements for homogenizing the illumination can be saved.

In an exemplary embodiment, the first distance can be formed along a first line arranged perpendicular to the axis, the second distance can be formed along a second line arranged perpendicular to the axis, and the first line and the second line can be formed parallel to one another. Preferably, the first straight line and the second straight line may point in the same direction. The light-guiding element can thus be designed in particular such that a uniform illumination can be ensured and ensured by means of the light-guiding element. By using a light-guiding element for further guiding the light beam, in particular, space and effort, for example, costs, can be saved, since a homogenization of the light beam can be achieved by means of the light-guiding element.

In one refinement, the light-guiding element can have a first surface, wherein at least one light incoupling surface is arranged on the first surface, wherein the first surface has at least one projection, and wherein the at least one light incoupling surface is arranged on the at least one projection. A corresponding design of the light-guiding element can save especially installation space. In particular, furthermore, an efficient production of the light-guiding element can be ensured. The light-guiding element can be manufactured, for example, by means of injection molding.

Advantageously, at least one recess can be introduced in the light-guiding element. The recess can in particular reduce or prevent the loss of the light beam, since the light beam is reflected in particular at the recess. The internal, in particular total reflection, of the light beam on the recess prevents the light beam from being lost in the light-guiding element. In particular, an optimal and sufficient and reliable illumination can thereby be ensured by means of the light-guiding element. Furthermore, the production of the light-guiding element can be configured efficiently by means of the recess. The recess can, for example, avoid material accumulation in the injection molding process, as a result of which the injection molding process can be optimized.

In one exemplary embodiment, the at least one recess can be configured to be open with respect to the surroundings of the light-guiding element. Alternatively or additionally, the at least one recess can in particular be arranged between the at least one light incoupling surface and the axis. Preferably, the at least one recess may be arranged such that a light beam coupled in through the at least one light incoupling surface is deflectable on the at least one recess in the direction of the at least one light outcoupling surface. By means of the respective recess, the loss of the light beam in the light-guiding element can be reduced, in particular by internal reflection on the recess, as a result of which, in particular, a uniform, sufficient illumination by means of the light-guiding element can be ensured. Furthermore, the production of the light-guiding element can be designed efficiently by means of the recesses, since, for example, material accumulations for injection molding methods can be avoided.

In an advantageous embodiment, the at least one light outcoupling surface can be annularly configured. In particular, a backlighting (hindlereuchtung) of the annular element can thereby be ensured, wherein in particular a uniform illumination can be achieved by means of the light guide element having the annular light outcoupling surface.

Furthermore, the light-guiding element may be composed of a transparent plastic. By means of the transparent design of the light-guiding element, in particular a light beam can be guided through the light-guiding element and coupled out at the light outcoupling surface. The light-guiding element is made of a transparent plastic material, which enables particularly efficient production. The light-guiding element can be manufactured, for example, by means of injection molding. Furthermore, the use of plastic makes a simple design of the light-guiding element possible. In other words, the light guiding element may have a small weight. The light-guiding element can in particular be simply machined or further machined.

In an exemplary embodiment, the light guide element can have a first light incoupling surface and a second light incoupling surface, which are designed to incouple the light beam into the light guide element, wherein the first light incoupling surface and the second light incoupling surface are arranged opposite one another with respect to the axis of the light guide element. The light-guiding element furthermore has, in particular, a first light outcoupling surface and a second light outcoupling surface, which are designed to outcouple light beams from the light-guiding element, wherein the first light outcoupling surface and the second light outcoupling surface are arranged opposite to each other with respect to an axis of the light-guiding element. It is further preferred that the shortest first distance between the first light in-coupling surface and the axis is greater than the shortest second distance between the first light out-coupling surface and the axis, and that the shortest third distance between the second light in-coupling surface and the axis is greater than the shortest fourth distance between the second light out-coupling surface and the axis. The light-guiding element can thus be designed in particular such that a uniform illumination can be ensured and ensured by means of the light-guiding element. By using a light-guiding element for further guiding the light beam, in particular, space and effort, for example, costs, can be saved, since a homogenization of the light beam can be achieved by means of the light-guiding element.

Furthermore, a lighting device is proposed, which has a light guide element, is designed for illuminating an operating device and has at least one light-emitting element, which is designed to emit a light beam in the direction of at least one light incoupling surface. The illumination device can be designed in particular such that a uniform illumination can be ensured and ensured by means of the illumination device having the light guide element.

Furthermore, an operating device with a lighting device is proposed. The illumination device has, in particular, a light-guiding element. Thereby, the operating device can be illuminated by means of the illumination device and thus by means of the light-guiding element. In particular, a uniform illumination of the operating device can thereby be ensured, which makes it possible for the operator to use the operating device in a particularly simple manner. Furthermore, the operator can preferably better perceive the operating device by means of a uniform identification illumination (ausweisbeliuchtonung).

In an advantageous embodiment, the operating device can have a housing with at least two reflective surfaces, wherein the light beam coupled out at the light coupling-out surface can be at least partially reflected at the at least two reflective surfaces of the housing. By means of which the device can be operated. Furthermore, a homogeneous and/or sufficiently bright illumination of the operating device can be ensured by means of the reflective surface. This makes it possible to use the operating device particularly easily.

Furthermore, the use of a light-guiding element in a lighting device, in particular in an operating device, is proposed, wherein the light beam emitted by the at least one light-emitting element is further conducted by the light-guiding element in such a way that the operating device is illuminated. A uniform illumination of the operating device can thereby be ensured by means of the light-guiding element.

Drawings

Embodiments of the invention are illustrated in the drawings and are explained in detail in the following description. The same reference numerals are used for elements shown in different figures and functioning similarly, wherein repeated descriptions of the elements are omitted. Wherein:

FIG. 1 shows a schematic diagram of a top view of a vehicle according to an embodiment of the invention;

FIG. 2 shows a schematic view of a light guiding element according to an embodiment of the present invention;

FIG. 3 shows a schematic view of a light guiding element according to an embodiment of the present invention;

FIG. 4 shows a schematic view of a light guiding element according to an embodiment of the present invention;

FIG. 5 shows a schematic view of a light guiding element according to an embodiment of the present invention;

FIG. 6 shows a schematic view of a lighting device according to an embodiment of the invention;

FIG. 7 shows a schematic view of an operating device according to an embodiment of the invention;

fig. 8 shows a schematic view of an operating device according to an embodiment of the invention.

Detailed Description

Fig. 1 shows a schematic representation of a top view of a vehicle 20, for example a motor vehicle, having an operating device 22. The operating device 22 may be operated by a vehicle occupant 24. The operating device 22 may be designed, for example, for being operated by a vehicle occupant and thus receiving commands, as a result of which, in particular, corresponding actions or functions in or of the vehicle may be triggered. The operating device 22 may be arranged, for example, in a vehicle, for example, in an instrument panel 26 or a center console. Alternatively or additionally, one operating device 22 or another operating device 22 may be disposed at other locations in the vehicle 20. Thus, the vehicle occupant 24 is able to operate certain devices in the vehicle 20 and/or trigger certain functions by means of the operating device 22. For example, a display device, an air conditioning device, a navigation system of the vehicle 20 and/or the control of specific functions in the vehicle 20 can be operated by means of the operating device 22. The vehicle occupant 24 may be, for example, a driver and/or a passenger of the vehicle 20.

Fig. 2 shows a schematic cross-sectional view of a light guiding element 30 according to an embodiment of the present invention. The light-guiding element 30 can be used in particular in a lighting device, in particular in an operating device, wherein the light beam emitted by at least one light-emitting element of the lighting device is further guided by the light-guiding element 30 in such a way that the operating device is illuminated. The operating device can be arranged in particular in a vehicle according to fig. 1.

The light-guiding member 30 is at least partially constructed of a light-transmissive material. In an advantageous embodiment, the light-guiding element 30 can be at least partially made of a transparent plastic. Further, the light guiding element 30 has an axis 32 passing through the midpoint of the light guiding element.

Furthermore, the light-guiding element 30 has at least one light incoupling surface 34, which is designed to incouple a light beam into the light-guiding element 30. In this advantageous embodiment, the light-guiding element 30 has a first light incoupling surface 34, which is designed to incouple the light beam into the light-guiding element 30. The first light incoupling surface 34 may in particular be arranged on a first straight line 36 perpendicular to the axis 32. The first light incoupling surface 34 has a first spacing 38 from the axis 32. For this purpose, a first distance 38 is measured, in particular along a straight line 36, in particular from the axis 32 up to a center point of the first light incoupling surface 34. In other words, the midpoint of the first light incoupling surface 34 has a first spacing 38 from the axis 32. The first distance 38 is in particular configured or measured along a first straight line 36 arranged perpendicularly to the axis 32. The first distance 38 is thus in particular the first light in-coupling surface 34, in particular the shortest first distance 38 between a midpoint of the first light in-coupling surface 34 and the axis 32. In other words, the first light in-coupling surface 34, in particular a midpoint of the first light in-coupling surface 34, has the shortest first distance 38 from the axis 32.

Furthermore, the light-guiding element 30 has at least one light outcoupling surface 40, which is designed to outcouple a light beam from the light-guiding element 30. In this advantageous embodiment, the light-guiding member 30 has a first light outcoupling surface 40, which is configured for outcoupling a light beam from the light-guiding member 30. The first light outcoupling surface 40 has a second pitch 44 from the axis 32. For this purpose, in particular, a second distance 44 is measured from the axis 32 up to the center of the first light outcoupling surface 40. In other words, the midpoint of the first light outcoupling surface 40 has the second distance 44 from the axis 32. The second spacing 44 is configured or measured, in particular, along a second line 42 arranged perpendicular to the axis 32. The second distance 44 is thus in particular the first light outcoupling surface 40, in particular the shortest second distance 44 between the midpoint of the first light outcoupling surface 40 and the axis 32. In other words, the first light out-coupling surface 40, in particular the midpoint of the first light out-coupling surface 40, has the shortest second pitch 44 from the axis 32.

Advantageously, a first spacing 38 between the at least one light in-coupling surface 34, in particular the first light in-coupling surface 34, and the axis 32 is greater than a second spacing 44 between the at least one light out-coupling surface 40, in particular the first light out-coupling surface 40, and the axis 32.

In this advantageous embodiment, the light-guiding element 30 has a first light incoupling surface 34 and a second light incoupling surface 46, which are configured for incoupling a light beam into the light-guiding element 30, wherein the first light incoupling surface 34 and the second light incoupling surface 46 are arranged opposite to the axis 32 of the light-guiding element 30. In other words, the first light in-coupling surface 34 and the second light in-coupling surface 46 are arranged such that the first light in-coupling surface 34 and the second light in-coupling surface 46 are opposed with respect to the axis 32. The first light incoupling surface 34 and the second light incoupling surface 46 may be arranged in particular on a straight line 36 perpendicular to the axis 32 and at the

same distance

38, 48 or the same

shortest distance

38, 48 from the axis 32. The second light incoupling surface 46 has a third distance 48 from the axis 32, wherein the third distance 48 can be measured in a manner corresponding to the first distance 38. Thus, the third distance 48 is in particular the shortest third distance 48 between the second light incoupling surface 46, in particular the midpoint of the second light incoupling surface 46, and the axis 32. In particular, the first and

third spacings

38, 48 are the same length.

In this advantageous embodiment, the light-guiding member 30 has a first light outcoupling surface 40 and a second light outcoupling surface 50, which are configured for outcoupling a light beam from the light-guiding member 30, wherein the first light outcoupling surface 40 and the second light outcoupling surface 50 are arranged oppositely with respect to the axis 32 of the light-guiding member 30. In other words, the first light outcoupling surface 40 and the second light outcoupling surface 50 are arranged such that the first light outcoupling surface 40 and the second light outcoupling surface 50 are opposed with respect to the axis 32. In particular, the first light outcoupling surface 40 and the second light outcoupling surface 50 can be arranged on a straight line 42 perpendicular to the axis 32. In particular, the first light outcoupling surface 40 and the second light outcoupling surface 50 can have the same pitch or the same shortest pitch from the axis 32. The second light outcoupling surface 50 has a fourth distance 52 from the axis 32, wherein the fourth distance 52 can be configured corresponding to the second distance 44. The fourth spacing 52 is thus in particular the second light outcoupling face 50, in particular the shortest fourth spacing 52 between the midpoint of the second light outcoupling face 50 and the axis 32. In particular, the third and

fourth pitches

48, 52 are the same length.

Advantageously, the

shortest distance

38, 48 between the at least one

light incoupling surface

34, 46 and the axis 32 is greater than the

shortest distance

44, 52 between the at least one

light outcoupling surface

40, 50 and the axis 32.

In this advantageous embodiment, the shortest first spacing 38 between the first light incoupling surface 34 and the axis 32 is greater than the shortest second spacing 44 between the first light outcoupling surface 40 and the axis 32. Furthermore, the shortest third distance 48 between the second light incoupling surface 46 and the axis 32 is in particular greater than the shortest fourth distance 52 between the second light outcoupling surface 50 and the axis 32. In particular, the first distance 38 may be configured as a straight line and the second distance 44 may be configured as a straight line, wherein the straight lines of the first distance 38 and the straight lines of the second distance 44 are configured parallel to each other and in particular point in the same direction. In particular, the third distance 48 can be configured as a first straight line and the fourth distance 52 can be configured as a second straight line, wherein the straight lines of the second distance 44 and the straight lines of the fourth distance 52 are configured parallel to one another and in particular point in the same direction.

Further, the first and/or

third spacings

38, 48 may be configured along a first line 36 disposed perpendicular to the axis 32, and the second and/or

fourth spacings

44, 52 may be configured along a second line 42 disposed perpendicular to the axis 32. Preferably, the first line 36 and the second line 42 are configured parallel to each other.

In a further development, at least one

recess

54, 56 is introduced in particular in the light-guiding element 30. The at least one

recess

54, 56 can be configured to be open with respect to an ambient environment 58 of the light-guiding element 30. Preferably, the at least one

recess

54, 56 is arranged between the at least one

light incoupling surface

34, 46 and the axis 32. In this advantageous embodiment, the light-guiding element 30 has a first recess 54, wherein the first recess 54 is arranged in particular between the first light incoupling surface 34 and the axis 32. Furthermore, the light-guiding element has a second recess 56, wherein the second recess 56 is arranged in particular between the second light incoupling surface 46 and the axis 32. In particular, the at least one

recess

54, 56 is arranged such that a light beam coupled in through the at least one

light incoupling surface

34, 46 can be deflected on the at least one

recess

54, 56 in the direction of the at least one

light outcoupling surface

40, 50. For example, the first recess 54 is arranged such that a light beam coupled in via the first light incoupling surface 34 is deflectable on the first recess 54 in the direction of the first light outcoupling surface 40. Furthermore, the second recess 56 is in particular arranged such that a light beam coupled in via the second light incoupling surface 46 can be deflected on the second recess 56 in the direction of the second light outcoupling surface 50.

In this advantageous embodiment, at least one

recess

54, 56 is designed as a hollow body. The hollow body has in particular an elongated shape, wherein the length of the at least one

recess

54, 56 is in particular greater than the width of the at least one

recess

54, 56, wherein the width is in particular formed along the straight line 36. Preferably, at least one

recess

54, 56 has an at least approximately elliptical shape.

In a refinement, the light guide element 30 can have further light incoupling and/or light outcoupling faces and/or recesses.

Fig. 3 shows a schematic view of a top view of a light guiding element 30 according to an embodiment of the present invention. The light-guiding element 30 according to fig. 3 may be constructed in accordance with the light-guiding element 30 according to fig. 2. Furthermore, the light-guiding element 30 according to fig. 3 can be arranged in an operating device in a vehicle according to fig. 1. The axis 32 is shown in particular as a point.

The light-guiding element 30 according to fig. 3 has in particular at least one

projection

60, 62, 64, 66. The at least one light incoupling surface is in particular arranged on at least one

projection

60, 62, 64, 66. In this advantageous embodiment, the light-guiding element 30 has a first projection 60, a second projection 62, a third projection 64 and a fourth projection 66. The first light incoupling surface is in particular arranged on the first projection 60 and the second light incoupling surface on the second projection 62. Furthermore, a third light in-coupling surface may be arranged on the third protrusion 64 and a fourth light in-coupling surface may be arranged on the fourth protrusion 66. The first projection 60 and the second projection 62 are arranged in particular in such a way that the first projection 60 is opposite the second projection 62 with respect to the axis 32. The third projection 64 and the fourth projection 66 are particularly arranged in such a way that the third projection 64 and the fourth projection 66 are opposite with respect to the axis 32.

In this advantageous embodiment, the light-guiding element 30 has, in particular, a cylindrical shape, wherein the light-guiding element 30 is, in particular, designed as a hollow cylinder. The at least one

projection

60, 62, 64, 66 may in particular be arranged on a jacket 68 of the cylinder of the light-guiding element 30. The

projections

60, 62, 64, 66 and the light incoupling surface are arranged in particular on the first base surface of the cylindrical light-guiding element 30.

Furthermore, at least one fixing

element

70, 72, 74, 76 may be arranged on the jacket 68 of the cylinder of the light-guiding element 30. In this advantageous embodiment, in particular four fixing

elements

70, 72, 74, 76 are arranged. The first fixing elements 70, the second fixing elements 72, the third fixing elements 74 and the fourth fixing elements 76 are arranged alternately on the jacket 68 of the light-guiding element 30, in particular with respect to the

projections

60, 62, 64, 66. The

fastening elements

70, 72, 74, 76 in particular have holes 78 or bores 78, so that at least one screw, pin, nail and/or rivet can be guided through the holes or bores, so that the light-guiding element 30 can be arranged on another device.

In this advantageous embodiment, the at least one

light outcoupling surface

40, 50 is in particular of annular design. In other words, at least one

light outcoupling surface

40, 50 has the shape of a ring. The light outcoupling surfaces 40, 50 are thus in particular constructed continuously or in one piece. Preferably, in this advantageous embodiment, the light guiding element 30 has in particular a light outcoupling surface comprising a first light outcoupling surface 40 and a second light outcoupling surface 50. The annular

light outcoupling surface

40, 50 is in particular arranged on a second base surface of the cylindrical light-guiding element 30, wherein the second base surface is opposite to the first base surface. The annular

light outcoupling surface

40, 50 is in particular arranged on a base surface opposite the light incoupling surface.

Fig. 4 shows a schematic view of a light guiding element 30 according to an embodiment of the present invention from below. The light-guiding element 30 according to fig. 4 may be constructed in accordance with the light-guiding element 30 according to fig. 2 and/or 3. Furthermore, the light-guiding element 30 according to fig. 4 can be arranged in an operating device in a vehicle according to fig. 1.

In this advantageous embodiment, the light-guiding element 30 further has a third light incoupling surface 80 and a fourth light incoupling surface 82, which are configured for incoupling a light beam into the light-guiding element 30, wherein the third light incoupling surface 80 and the fourth light incoupling surface 82 are arranged opposite to the axis 32 of the light-guiding element 30. In other words, the third and fourth light in-coupling surfaces 80, 82 are arranged such that the third and fourth light in-coupling surfaces 80, 82 are opposed about the axis 32. The third and fourth light incoupling surfaces 80, 82 may in particular be arranged on a third straight line 84 perpendicular to the axis 32. The third light incoupling surface 80 and the fourth light incoupling surface 82 may in particular have the

same distance

86, 88 or the same

shortest distance

86, 88 from the axis 32. The third light incoupling surface 80 is in particular arranged on the third protrusion 64 and the fourth light incoupling surface 82 is in particular arranged on the fourth protrusion 66. In this embodiment, the first straight line 36 is arranged in particular perpendicularly to the third straight line 84.

The third light incoupling surface 80 has a fifth distance 86 from the axis 32, wherein the fifth distance 86 can be measured in a manner corresponding to the first distance 38. Thus, the fifth distance 86 is in particular the third light in-coupling face 80, in particular the shortest fifth distance 86 between a midpoint of the third light in-coupling face 80 and the axis 32. The fourth light incoupling surface 82 has a sixth distance 88 from the axis 32, wherein the sixth distance 88 can be measured in a manner corresponding to the first distance 38. Thus, the sixth distance 88 is in particular the shortest sixth distance 88 between the fourth light in-coupling surface 82, in particular the midpoint of the fourth light in-coupling surface 82, and the axis 32. In particular, first pitch 38, second pitch 48, fifth pitch 86, and sixth pitch 88 are the same length.

In this advantageous embodiment, the light-guiding element 30 also has a third light outcoupling surface, not visible here, and a fourth light outcoupling surface, not visible here, which are configured for outcoupling a light beam from the light-guiding element 30, wherein the third light outcoupling surface and the fourth light outcoupling surface are arranged opposite to each other with respect to the axis 32 of the light-guiding element 30. In particular, the third and fourth light out-coupling surfaces can have the same pitch or the same shortest pitch from the axis 32.

Advantageously, the

shortest distance

86, 88 between at least one light incoupling surface 80, 82 and the axis 32 is greater than the shortest distance between the respective at least one light incoupling surface and the axis 32. In this advantageous embodiment, the shortest fifth distance 86 between the third light incoupling surface 80 and the axis 32 is greater than the shortest distance between the respective light outcoupling surface and the axis 32. Furthermore, the shortest sixth distance 88 between the fourth light incoupling surface 82 and the axis 32 is in particular greater than the shortest distance between the respective light incoupling surface and the axis 32.

In this advantageous embodiment, the light-guiding element 30 has a first surface 90, wherein at least one

light incoupling surface

34, 46, 80, 82 is arranged on the first surface 90. The first surface 90 may for example be a base surface of a cylindrical light guiding element. Furthermore, wherein the first surface 90 has at least one

protrusion

60, 62, 64, 66, wherein the at least one

light incoupling surface

34, 46, 80, 82 is arranged on the at least one

protrusion

60, 62, 64, 66.

Furthermore, the light-guiding element 30 has in particular a third recess 92 and a fourth recess 94, wherein the third recess 92 is in particular arranged between the third light incoupling surface 80 and the axis 32, and the fourth recess 94 is in particular arranged between the fourth light incoupling surface 82 and the axis 32. The third recess 92 and/or the fourth recess 94 may be configured to correspond to the first recess 54 and/or the second recess 56.

Fig. 5 shows a schematic view of a light guiding element 30 according to an embodiment of the present invention. The light-guiding element 30 according to fig. 5 may be constructed according to the light-guiding element 30 according to fig. 2 and/or according to fig. 3 and/or according to fig. 4. Furthermore, the light-guiding element 30 according to fig. 5 can be arranged in an operating device in a vehicle according to fig. 1. In this advantageous embodiment according to fig. 5, the light-guiding element 30 is shown in a perspective view.

Fig. 6 shows a schematic view of a lighting device 100 according to an embodiment of the invention. The lighting device 100 is designed to illuminate an operating device, wherein the lighting device 100 according to fig. 6 can be arranged in the operating device according to fig. 1 in a vehicle. The illumination device 100 has a light guiding element 30. The light-guiding element 30 according to fig. 6 may be constructed according to the light-guiding element 30 according to fig. 2 and/or according to fig. 3 and/or according to fig. 4 and/or according to fig. 5.

Furthermore, the lighting device 100 has at least one light-emitting

element

102, 104, 106, 108, which is designed to emit a light beam in the direction of at least one light entry surface of the light guide element 30 and thus in the direction of the light guide element 30. In this advantageous embodiment, the lighting device 100 has a first light-emitting element 102, which is designed to emit a light beam in the direction of the first light incoupling surface, a second light-emitting element 104, which is designed to emit a light beam in the direction of the second light incoupling surface, a third light-emitting element 106 and a fourth light-emitting element 108, which is designed to emit a light beam in the direction of the third light incoupling surface and a fourth light-emitting element 108.

Fig. 7 shows a schematic view of the operating device 22 according to an embodiment of the invention. The operating device 22 has a lighting device 100 and can be arranged in a vehicle in the advantageous embodiment according to fig. 1. The lighting device 100 is designed for illuminating the operating device 22 and can be designed as the lighting device 100 according to fig. 6. The illumination device 100 has a light guiding element 30. The light-guiding element 30 according to fig. 7 can be constructed as the light-guiding element 30 according to fig. 2 and/or 3 and/or 4 and/or 5 and, in particular, is arranged in the illumination device 100 according to fig. 6.

The light-guiding element 30 can be used in particular such that the light beam 112 emitted by the at least one light-emitting

element

102, 104 is further guided by the light-guiding element 30 in such a way that the operating device 22 is illuminated. In other words, a light beam 112 is emitted by the first light emitting element 102 and/or the second light emitting element 104 and/or the further light emitting elements, wherein the light beam 112 is coupled into the light guiding element 30 through the at least one

light incoupling surface

34, 46. Thus, a light beam 112 emitted by the first light emitting element 102 is coupled into the light guiding element through the first light incoupling surface 34. The coupled-in light beam 112 is further guided in the light-guiding member 30 in such a way that the light beam 112 is guided to the first light outcoupling surface 40. In order to uniformly illuminate the operating device 22, the light beam 112 is sufficiently scattered in the light-guiding element 30. To this end, the light beam 112 may be reflected or deflected on the walls of the light guiding element 30 and/or on the first recess 54. Subsequently, the light beam 112 is guided out of the light-guiding element via the first light outcoupling surface 40 and in particular in the direction of the cover 114 of the operating element 22. Accordingly, the light beam may be deflected by the further light emitting element 104 via the further light incoupling surface 46 to the shade 114 via the light guiding element 30.

The cover 114 in particular has at least two

reflection surfaces

116, 118, wherein the light beam 112 coupled out at the light outcoupling surfaces 40, 50, in this case at the first light outcoupling surface 40, can be reflected at least partially at the at least two

reflection surfaces

116, 118 of the cover. Thus, the light beam 112 coupled out of the

light outcoupling surface

40, 50 can be reflected on the first reflective surface 116 and/or the second reflective surface 118. Thereby, the operating device 22 and thus the cover 114 of the operating device 22 are illuminated from below.

The cover 114 may also have a corrugated or fluted construction 120, which may, for example, allow for better gripping by an operator.

Fig. 8 shows a schematic view of the operating device 22 according to an embodiment of the invention. The operating device 22 can be configured according to the operating device 22 according to fig. 7 and can be arranged in a vehicle, in particular according to fig. 1. In this advantageous embodiment, the operating device 22 is shown from above, whereby the hood 114 and the light beam 112 illuminating the hood 114 from below are visible in particular.

Claims

1. Light-guiding element (30) for a lighting device (100), in particular for an operating device (22),

wherein the light-guiding element (30) is at least partially composed of a light-transmitting material, characterized in that,

the light-guiding element (30) has at least one light incoupling surface (34, 46, 80, 82) which is designed to couple a light beam (112) into the light-guiding element (30), and

the light-guiding element (30) has at least one light outcoupling surface (40, 50) which is designed to outcouple a light beam (112) from the light-guiding element (30),

the light-guiding element (30) has an axis (32) passing through a midpoint of the light-guiding element (30), and

a first spacing (38) between the at least one light incoupling surface (34, 46, 80, 82) and the axis (32) is greater than a second spacing (44) between the at least one light outcoupling surface (40, 50) and the axis (32).

2. The light-guiding element (30) according to claim 1, characterized in that the first spacing (38) is configured along a first straight line (36) arranged perpendicular to the axis (32), the second spacing (44) is configured along a second straight line (42) arranged perpendicular to the axis (32), and the first straight line (36) and the second straight line (42) are configured parallel to each other.

3. A light-guiding element (30) as claimed in claim 2, characterized in that the first straight line (36) and the second straight line (42) point in the same direction.

4. A light-guiding element (30) according to any one of the preceding claims, characterized in that the light-guiding element (30) has a first surface, wherein at least one light incoupling surface (34, 46, 80, 82) is arranged on the first surface, the first surface having at least one protrusion (60, 62, 64, 66), and the at least one light incoupling surface (34, 46, 80, 82) is arranged on at least one protrusion (60, 62, 64, 66).

5. The light-guiding element (30) according to any one of the preceding claims, characterized in that at least one recess (54, 56, 92, 94) is introduced in the light-guiding element (30).

6. The light-guiding element (30) according to claim 5, characterized in that the at least one recess (54, 56, 92, 94) is configured open with respect to the surroundings of the light-guiding element (30).

7. The light-guiding element (30) according to any one of the preceding claims 5 to 6, characterized in that the at least one recess (54, 56, 92, 94) is arranged between the at least one light incoupling surface (34, 46, 80, 82) and the axis (32).

8. A light-guiding element (30) according to any one of the preceding claims 5 to 7, characterized in that the at least one recess (54, 56, 92, 94) is arranged such that a light beam (112) coupled in through the at least one light incoupling surface (34, 46, 80, 82) is deflectable at the at least one recess (54, 56, 92, 94) in the direction of the at least one light outcoupling surface (40, 50).

9. The light-guiding element (30) according to any one of the preceding claims, characterized in that the at least one light outcoupling surface (40, 50) is annularly configured.

10. The light-guiding element (30) according to any one of the preceding claims, characterized in that the light-guiding element (30) consists of a transparent plastic.

11. The light-guiding element (30) according to any one of the preceding claims, wherein the light-guiding element (30) has a first light incoupling surface (34) and a second light incoupling surface (46) configured for incoupling a light beam into the light-guiding element (30), wherein the first light incoupling surface (34) and the second light incoupling surface (46) are arranged opposite with respect to an axis (32) of the light-guiding element (30),

the light-guiding element (30) has a first light outcoupling surface (40) and a second light outcoupling surface (50) which are configured for outcoupling a light beam (112) from the light-guiding element (30), wherein the first light outcoupling surface (40) and the second light outcoupling surface (50) are arranged opposite to each other with respect to an axis (32) of the light-guiding element (30),

a shortest first spacing (38) between the first light incoupling surface (34) and the axis (32) is greater than a shortest second spacing (44) between the first light outcoupling surface (40) and the axis (32), and

the shortest third distance (48) between the second light incoupling surface (46) and the axis (32) is greater than the shortest fourth distance (52) between the second light outcoupling surface (50) and the axis (32).

12. Illumination device (100) with a light guide element (30) according to one of the preceding claims, which is configured for illuminating an operating device (22) and has at least one light-emitting element (102, 104, 106, 108) which is configured for emitting a light beam (112) in the direction of the at least one light incoupling face (34, 46, 80, 82).

13. Operating device (22) with a lighting device (100) according to claim 12.

14. The operating device (22) according to claim 13, wherein the operating device (22) has a housing (114) with at least two reflection surfaces (116, 118), wherein the light beam (112) coupled out at the light coupling-out surface (40, 50) can be reflected at least partially at the at least two reflection surfaces (116, 118) of the housing (114).

15. Use of a light-guiding element (30) according to one of the preceding claims 1 to 11 in a lighting device (100) according to claim 12, in particular in an operating device (22) according to one of the preceding claims 13 to 14,

it is characterized in that the preparation method is characterized in that,

the light beam (112) emitted by the at least one light-emitting element (102, 104, 106, 108) is further guided by the light-guiding element (30) in such a way that the operating device (22) is illuminated.