JP4190493B2 - Writing equipment - Google Patents

Description

  The invention relates in particular to a lighting device for a motor vehicle (motor vehicle), which comprises a housing substantially covered with a transparent and optically inert cover pane (coated glass plate), Disposed in the housing is at least one light formed from a lamp with an attached reflector.

  Increasingly, automotive lighting devices, particularly front light assemblies, have a transparent cover pane with no optical function. The light distribution to be generated by the light located behind the cover pane is realized by corresponding formation of the reflector and the lamp attached thereto. For this purpose, it is necessary to have a predetermined configuration depth, a predetermined surface structure, a predetermined symmetry or asymmetry with respect to the components used. In many cases, the reflector is adjustable in position, for example, to allow headlight optical axis adjustment adapted to the respective load capacity of the vehicle. For example, a light source or lamp, such as an incandescent lamp or a gas discharge lamp, can be covered by an auxiliary cap. Along with the structurally advantageous realization of various position adjustability by positioning the optically active component inside the light, a transparent cover pane is also required based on the design rules in the meantime. . Through the transparent cover pane, the details of the lamps and reflectors, which are sometimes costly configured, can be seen undisturbed, so if the lights are not on, that kind of frontlight for the viewer The technical impression is very important. Furthermore, a relatively large reflector depth will make the projector (headlamp, reversing lamp, etc.) or light appear very large.

  According to the regulations of the vehicle design, the overall visual impression of the lighting device should also be taken into account as another limiting condition of the predetermined configuration size and the predetermined shape because the lighting device has a predetermined vehicle This is because it should be incorporated in the body in harmony.

  However, on top-class vehicles that should give a rather elegant impression, however, a strong emphasis on the technical details of the floodlights with a clear view through the transparent cover pane and an impression of a very large floodlight ensemble with a relatively large reflector However, it feels rather disturbing. Furthermore, in many cases, the given reflector shape and reflector surface that will guarantee optimal even light distribution and opto-technical efficiency are not used without limitation, because they are in the design specification. This is because it does not correspond and can visually adversely affect observation.

  From Patent Document 1, a headlamp device is known, which is covered with a transparent lens. The different reflector parts inside the device have predetermined coatings that are colored in line with the vehicle paint. This makes the cover lens look like the color of the surrounding body for the observer. In particular, the reflector housing and the lamp jacket can be coated with the color of the adjacent body part. The reflector itself can also be coated with color. In this case, a partially transparent metal layer with color is deposited on the reflector surface, which metal layer will show the reflector with color on the one hand and illumination from the underlying coating on the other hand. When is turned on, the light reflected by this base coating is radiated outward without color change.

  The disadvantage of the known device is that the technical details of the structure can be seen at least in the approach area if the lighting is not turned on, even though the headlamp appearance is chromatically synchronized with the surrounding body. It can be done. This is especially true when the reflector is covered with a transparent cover pane instead of a lens. Furthermore, a uniform appearance cannot be obtained with variously colored lamps, such as light assemblies with yellow turn signal lights.

US Patent No. 5010458

  The problem of the present invention is therefore that the lighting device does not rely on a reflector / lamp configuration optimized for light distribution, but evokes an elegant and visually expensive impression for the observer, It is an improvement to a lighting device with a transparent cover pane that is incorporated in harmony with the design. The technically required reflector / lamp configuration should be as small as possible, even if it affects the overall appearance of the lighting device.

This object is related to the premise part (so-called part, preamble part) of claim 1 according to the present invention, and a screen formed as a partially transmissive mirror is arranged between the cover pane and the light. This screen separates the rear lighting space that accepts the light from the front lighting space formed by the screen and the cover pane, so that the rear lighting space looks in the direction of the light. Invisible to the viewer, the screen is transparent to the light emitted by the lamp when the illumination is on, and at least one coupling between the screen and the housing and / or cover pane Expansion seam (expansion allowance / expansion seam) or hole (gap) to equalize material stress due to heat It is solved by is provided. As measures to avoid material stress between the structural members such as the housing, screen, and cover, the expansion seam (expansion allowance / expansion seam) and hole (gap) are provided, so that The risk of cracking due to different thermal expansions and external effects such as frost and direct sunlight is prevented. This extends the life of the lighting device.

  Due to the arrangement of the screen between the transparent cover pane and the reflector with the lamp, the technical details, i.e. the reflector and the incandescent lamp, or the reflector and the lamps are invisible in the light assembly. The screen serves as a partially transmissive mirror and serves as a field of view protection for the rear lighting space. In contrast, light emitted from one or more lamps passes through the mirror unchanged or at least substantially unchanged. Due to the reflective surface and the relatively flat front lighting space defined by the screen, the entire lighting device gains a very “flat-structured” design, which is visually favored. Because the reflectors and lights are invisible, they can be realized for optimal light distribution without regard to the transmitted visual impression regarding their shape and surface. Thereby, the technically achievable efficiency of the lighting device can be better utilized. Thereby, particularly uniform irradiation is possible. Colored incandescent lamps, such as yellow turn signal lights, can work unhindered. The lighting device according to the invention is particularly harmonious with the use of extremely high opto-technical efficiency lighting components and conveys an expensive and elegant visual impression.

  According to an advantageous embodiment of the invention, the screen consists of a base plate with a partially permeable metal coating applied by vapor deposition on the front side facing the cover pane.

  With a deposited metal layer, a simple, low-cost, partially transmissive mirror can be produced. The thickness of the metal layer is preferably located in the wavelength range of visible light, so that the metal layer has a requirement for a partially transmissive mirror with respect to the front invisibility with reflection and when the illumination is on In addition, it meets the requirements for the transparency of light emitted from the lighting device. In principle, a suitable dielectric coating of the base plate in a screen consisting of one or several layers can also be envisaged in order to realize a partially transmissive mirror.

  According to another advantageous embodiment of the invention, the base plate is made of transparent plastic.

  A plate made of transparent plastic can be manufactured in a desired shape easily and at low cost. The plate has a low weight and can be easily placed and gripped in the lighting device. Transparent prestic ensures that the light of one or more incandescent lamps or gas discharge lamps can pass through the base plate at least substantially unchanged.

  According to another advantageous embodiment of the invention, the screen has a contour adapted to the light.

  The contouring of the screen preferably mirrors the reflector shape. If there are multiple reflectors in the lighting device, the same applies to the other reflectors. Thereby, the impression of the floodlight is evoked without over-emphasizing the technical details. This impression is thereby elegant but not too abstract or unrealistic, thus further improving the overall impression of the lighting device.

  According to another advantageous embodiment of the invention, the screen is gripped at the receiving part at the edge of the housing and / or at the receiving part at the edge of the cover pane, so Closely and tightly closed.

  The gripping of the screen at the receiving part of the housing and the edge of the cover makes it possible to fix the components more securely, especially during the assembly of the lighting device. For example, each of the edges of the housing and the cover pane can be provided with a circulating groove, and the protruding protrusions on both sides of the screen are engaged in the groove. For sealing, a sealing ring can be provided which additionally circulates around the projection on both sides. The fixed hermetic coupling of the components can be realized by detents that lock the members together and seal them during assembly. The joint or detent can be designed to be removable again, for example to replace a defective cover pane. This has an advantageous effect on the maintenance and repair costs that may arise.

  According to another advantageous embodiment of the invention, the screen is fixedly bonded to the edge of the housing and the edge of the cover pane by adhesive bonding.

  By adhering the components to the edges, the screen can be attached easily and particularly at low cost.

  According to another advantageous embodiment of the invention, the screen is fixed inside the housing.

  Instead of the peripheral edge areas of the housing and the cover pane, the screen can also be simply fixed inside the housing, i.e. on the inner wall of the housing. Thereby, when using the screen in previous lighting devices, no structural changes in the housing and cover joints are required, and thus cost savings in manufacturing are achieved.

  According to another advantageous embodiment of the invention, the screen is fixed inside the cover pane.

  By fixing the screen inside the cover pane, a so-called monolithic component is obtained, which has a low cost with respect to assembly costs.

  For example, sufficient heat load relief can be achieved by a rear fan or other measures to dissipate the heat generated in the rear lighting space.

  According to another advantageous embodiment of the invention, the lamp and reflector design can be adapted to the interaction of the light emitted by the lamp with the screen in order to produce a defined light distribution.

  The lamp and reflector, i.e. the light components, can be adapted to the interaction of the light that can be emitted by them with the screen, so that the light distribution, which is particularly demanding, can be accurately maintained. Exceptional cases from special combinations of emitted light wavelength, screen material and coating, in which case slight light scattering, light refraction or light absorption is eliminated If it cannot be done and the light distribution to be maintained will be compromised by precise regulation, the components of one or more lights may be appropriately adapted either structurally or by appropriate selection of components. This is achieved without compromising the visually expensive lighting device impression to be achieved, as the rear lighting space is not visible. By adapting the light, in some cases the influence of the screen on the light distribution can be adjusted.

  Other details of the invention will be apparent from the following detailed description and the accompanying drawings, in which advantageous embodiments of the invention are described in detail.

  The lighting device according to the invention consists essentially of a housing 5 comprising a light 11, a screen 7 and a cover pane 1.

  The embodiment according to FIG. 1 shows a front light assembly with a second light 11 ′. For example, the light 11 can be formed as a position day driving light, and the light 11 'can be formed as a turn signal light. These lights 11, 11 'are composed of an incandescent lamp 4 or 4' and a reflector 3 or 3 'attached to each of them, and are fixed in a housing 5 in a well-known manner, Connected to the switching device. The housing 5 is covered with a transparent cover pane 1 which is preferably formed as a glass plate contoured to fit the shape of the headlamp and the surrounding body. For ease of viewing the drawing, only a rectangular shape is shown in FIG. The housing 5 and the cover pane 1 have surrounding edges 12 or 13, and the screen 7 is supported between these edges by, for example, a hole (not shown) or a receiving part. The screen 7 is fixedly connected to the housing 5 on the one hand and to the cover pane 1 on the other hand, for example via a detent (not shown), so that the lighting device is sealed from the outside in the area of the connection. ing. Optionally, the joints can also be simple adhesive joints. The screen 7 separates the rear writing space 9 from the front writing space 10. The rear lighting space 9 receives the lights 11 and 11 ′ and is formed by the housing 5 and the screen 7. The front writing space 10 is formed by the screen 7 and the cover pane 1. The screen 7 itself consists of a base plate 2 preferably made of transparent plastic, on the front side facing the cover pane 1, i.e. on the one side, a partially permeable thin metal layer 8, preferably a silver layer, is deposited. Has been. Thereby, a partially transmissive mirror is formed. For the observer, the screen 7 is seen as a mirror when the illumination is off. For the observer, the writing space 9 behind cannot be seen. On the other hand, when the illumination is on, the light emitted by the lamp 4 or 4 ′ is emitted to the outside through the screen 7 with the respective light distributions generated by the reflector 3 or 3 ′.

  Two contour forming portions 6 or 6 ′ are formed on the screen 7. The contour forming portions 6 and 6 ′ suggestively copy the shape of the reflector 3 or 3 ′ attached thereto. This allows the observer to see a flat headlamp with the suggested reflectors but no technical details, thus conveying the desired impression of an elegant and visually expensive lighting device.

And FIG. 6 shows an advantageous embodiment of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover pane 2 Base plate 3, 3 'reflector 4, 4' lamp 5 Housing 6, 6 'Contour formation part 7 Screen 8 Coating 9 Back lighting space 10 Front lighting space 11, 11' Light 12 Housing edge part 13 Cover pane Edge

Claims (9)

A lighting device, in particular an automotive lighting device, which comprises a housing substantially covered by a transparent and optically inert cover pane, in which an attached In the lighting device, wherein at least one light formed from a lamp with a reflector is arranged,
Between the cover pane (1) and the light (11), a screen (7) formed as a partially transmissive mirror is arranged, and this screen (7) receives the light (11). The rear lighting space (9) is separated from the front lighting space (10) formed by the screen (7) and the cover pane (1), so that the rear lighting space (9) becomes light (11). Hidden to the observer who looks in the direction of, and the screen (7) is transparent to the light emitted by the lamp (4) when the illumination is on ,
At least one joint between the screen (7) and the housing (5) and / or the cover pane (1) is provided with an expansion seam or hole for equalizing the material stress due to heat. A lighting device characterized by that .   The screen (7) is composed of a base plate (2) having a partially permeable metal coating (8) applied by vapor deposition on the front side facing the cover pane (1), The writing device according to claim 1.   Lighting device according to claim 2, characterized in that the base plate (2) is made of transparent plastic.   4. A lighting device according to claim 1, wherein the screen (7) has a contouring part (6, 6 ') adapted to the light (11, 11'). Screen (7), a housing receiving at the edge of the (5) (12), and / or, be held in the receiving part at the edge of the cover pane (1) (13), a housing edge (12) The lighting device according to any one of claims 1 to 4, characterized in that it is flush with and close to the cover pane edge (13).   5. The screen according to claim 1, wherein the screen is fixedly bonded to the edge of the housing and the edge of the cover pane by bonding. The writing device described in 1.   5. The lighting device according to claim 1, wherein the screen (7) is fixed inside the housing (5).   5. A lighting device according to any one of claims 1 to 4, characterized in that the screen (7) is fixed inside the cover pane (1). The design of the lamp (4, 4 ′) and the reflector (3, 3 ′) each of the light emitted by the lamp (4, 4 ′) with the screen (7) to produce a predetermined light distribution. characterized in that it is adaptable to the interaction, the lighting device according to any one of claims 1-8.

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