Mounting system for a frame element of a display device

Abstract

To provide a display device with a frame element which has an improved fastening, a display device (100) is proposed comprising a frame element (10) for covering an edge region of a display element (14) and comprising a support element (11) for fastening the display element (14) and the frame element (10) to the support element (11), wherein the frame element (10) has several connecting elements (12) projecting from a base body (12c) of the frame element (10) along its circumference, and wherein the support element (11) has several connection areas (11a) which are designed for fastening the connecting elements (12), in particular by adhesive fastening.

Description

[0001] The invention relates to a display device, a frame element designed for use in such a display device and a support element designed for use in such a display device. State of the art

[0002] In the vehicle interior, various design components are located within the occupants' field of vision, for example, as surrounds for display and glass assemblies. These design components are usually glued to the back of the display glass or attached to a support with screws or clips.

[0003] Bonding to the glass is not always possible for various reasons. For example, there may not be sufficient installation space, as the edges of displays are becoming increasingly narrow. Furthermore, for sustainability reasons or to facilitate repairs, the glass or display itself should be replaceable. Product requirements can also complicate the attachment of the glass; for example, a head impact test requires that the glass be attached to a load-bearing component. If the glass is also intended to provide haptic feedback, an adhesive used to attach the glass would dampen any vibrations in the glass.

[0004] Screwing or clipping to the support is often insufficient and often only possible in areas not visible from the display, as sink marks, particularly in plastic components, can occur. These lead to significant leverage, which can reduce the rigidity of the design components and reduce haptic quality. Noise can occur due to vibration and misuse forces.

[0005] Furthermore, some fastening concepts do not allow for precise alignment and fixation to the glass all the way around the component. Furthermore, design components are becoming increasingly larger, while customer requirements for gap dimensions are becoming smaller.

[0006] A fastening is required that meets the above-mentioned conditions, in particular that there are no sink marks in the visible area and that precise alignment of the design component to the glass is possible. Disclosure of the invention

[0007] The invention is therefore based on the object of providing a display device with a frame element which has an improved fastening.

[0008] The object of the invention is achieved by a display device comprising a frame element for covering an edge region of a display element and comprising a carrier element for fastening the display element and the frame element to the carrier element, wherein the frame element has a plurality of connecting elements protruding from a base body of the frame element along its circumference, and wherein the carrier element has a plurality of connecting regions which are designed for fastening the connecting elements, in particular by adhesive means.

[0009] The protruding connecting elements and the connecting areas enable flexible attachment of the frame element to the support element. Attaching the frame element to the support element, in particular, allows for a mechanically stable attachment. Since the frame element is not attached to any glass of the display device, the properties of the glass for providing haptic feedback are not compromised.

[0010] Preferably, the connecting elements are each designed as a rib, in particular as a rib-like projection. The ribs advantageously enable the frame element to be securely fixed to the support element.

[0011] Preferably, several of the connecting elements and receiving recesses are arranged at equal distances along a circumference of the frame element.

[0012] Preferably, a thickness of at least one rib, in particular the thickness of the at least one rib in the connecting region between the respective rib and the base body, is smaller than a thickness of the base body of the frame element, in particular the thickness of the base body in the connecting region between the respective rib and the base body. In particular, all ribs of the frame element are designed as described above. Because the rib or ribs are wider than a thickness of the base body, the formation of sink marks is advantageously prevented. A width of the rib refers to an extension of the rib perpendicular to its longitudinal extension and its height, wherein the height extends in the direction in which the rib protrudes from the base body. A thickness of the base body is in particular a, preferably minimum, thickness of the frame element. In particular, the rib or ribs havethe ribs have a constant thickness along their length.

[0013] Preferably, the connecting regions each comprise a receiving recess for receiving one of the connecting elements, wherein the connecting elements are fixed in the receiving recess, in particular by means of an adhesive. In particular, each connecting element is assigned a receiving recess. The arrangement of the connecting elements advantageously enables simplified, at least rough, positioning of the frame element relative to the support element. A mechanically strong connection between the connecting element and the receiving recess is also enabled. Furthermore, the adhesive can be placed particularly easily and precisely in the receiving recess.

[0014] Preferably, each of the receiving recesses is designed such that the connecting element is surrounded by a cavity when the connecting element is arranged in the receiving recess, wherein in particular adhesive is arranged in the cavity for fixing the connecting element in the receiving recess. The cavity serves, on the one hand, to accommodate the adhesive. On the other hand, it is advantageously possible to place the connecting element in the still liquid adhesive in the receiving recess and then align the frame element relative to the support element, since the cavity provides space for movement for the connecting element. The adhesive then hardens, so that a firm connection is established between the frame element and the support element in the selected position.

[0015] The connecting element and the receiving recess preferably have a shape adapted to one another. In particular, the connecting element has a substantially crescent-shaped section for arrangement in the receiving recess, and the receiving recess correspondingly also has a crescent-shaped receiving area. Accordingly, a cavity formed between the connecting element and the receiving recess has a hollow crescent shape, at least in some areas. However, other shapes for the connecting element or the receiving device are also conceivable, depending on the requirements of the connection or the available installation space.

[0016] Thermal expansion, especially in large displays, can pose a challenge when it comes to maintaining a consistent shape during temperature fluctuations due to the different materials and different thermal expansion coefficients of the interconnected parts. For example, some parts may take on a wavy shape during temperature fluctuations, which impairs their visual appearance.

[0017] Preferably, the frame element therefore has a geometric center, wherein the receiving recesses and / or the connecting elements each have a longitudinal extension with a longitudinal axis, and wherein the respective longitudinal axes of at least a first selection of receiving recesses and / or a first selection of connecting elements, in particular all receiving recesses and / or connecting elements, are oriented radially to the geometric center of the frame element.

[0018] The geometric center refers in particular to a surface spanned or enclosed by the frame element. This surface can have an axis of symmetry or a point of symmetry or a mirror axis or a mirror point, with the geometric center referring to this point of symmetry or mirror point or a center of the axis of symmetry or mirror axis. Furthermore, the geometric center can be located at an intersection point of axes drawn through the mean height and mean width of the frame element.

[0019] By arranging the mounting recesses relative to the geometric center, the attachment of the frame element to the support element can be adapted to the geometry of the frame element. This allows the stiffness of the connection to vary locally at each of the connection points, so that any waviness of the material due to different expansion during temperature fluctuations can be compensated.

[0020] Preferably, the receiving recesses each have a longitudinal extension with a longitudinal axis, wherein the receiving recesses each have a first length L1, wherein the receiving recesses have different lengths depending on a distance of the respective receiving recess to the geometric center of the frame element, wherein in particular the length of the receiving recesses increases with increasing distance to the geometric center of the frame element, and / or wherein in particular the connecting elements each have a second length L2 and the lengths L2 of all connecting elements are constant.

[0021] With a constant length L2 of the connecting element, a relatively short length L1 of a receiving recess results in a stiffer connection than a longer receiving recess.

[0022] The lengths L1 and L2 refer in particular to a length measured at an opening edge of the receiving recess or to a maximum length of the receiving recess.

[0023] By varying the lengths of the receiving recesses depending on the geometric center, a uniform force distribution across the frame element can be achieved during thermal expansion. This can advantageously prevent deformations, particularly wave formation, in the frame element.

[0024] The geometric center of the frame element preferably also corresponds to the geometric center of the support element.

[0025] Analogous to the receiving recesses, the connecting elements preferably also have a longitudinal axis oriented in the same way as the longitudinal axis of the receiving recess associated with the connecting element. Furthermore, the connecting elements have a longitudinal extension with a length, in particular a maximum length, which can vary with the distance from the geometric center, analogous to the length of the associated receiving recess. Alternatively, however, only the receiving recesses can have a varying length, while the connecting elements can have constant lengths.

[0026] The frame element preferably has an opening at a location along the circumference, wherein the longitudinal axes of a second selection of receiving recesses and / or the longitudinal axes of a second selection of connecting elements, which are arranged in the region of two free ends of the frame element (10) in the region of the opening (21), are not oriented radially to a geometric center of the frame element. At the location of the opening in the frame element or at the open ends formed by the opening, there is preferably a deviation from the radial alignment of the receiving recesses or the connecting elements in order to establish the necessary rigidity of the connection at these locations.

[0027] The orientation of the longitudinal axes of the second selection of receiving recesses and / or connecting elements is preferably determined using the finite element method or a finite element simulation.

[0028] The display device can further comprise a glass element, which is held by the support element of the display device. The display device is preferably arranged in a vehicle. In particular, the display device is a component of a display of a playback device, for example, an infotainment system.

[0029] The object of the invention is further achieved by a frame element which is designed for use in a display device having the aforementioned features.

[0030] Furthermore, the object of the invention is achieved by a carrier element which is designed for use in a display device having the aforementioned features.

[0031] The invention is explained in more detail below using exemplary embodiments. They show, in purely schematic representations: Fig. 1 the structure of a display device, Fig. 2 a detailed view of an edge region of a display device according to the invention, Fig. 3 a cross-sectional view of an edge region of a display device according to the invention, Fig. 4 a plan view of a frame element according to the invention, Fig. 5 a detailed view of an edge region of a frame element according to the invention, Fig. 6 a detailed view of an edge region of a carrier element according to the invention, Fig. 7 a cross-sectional view of a display device with radially aligned receiving recesses and connecting elements, Fig. 8 a cross-sectional view of a display device with radially aligned receiving recesses and connecting elements and an opening in the frame element, and Fig. 9a-c different designs of connecting elements and receiving recesses with different lengths.

[0032] Fig. 1 shows an exemplary structure of a display device 101 from the prior art. The display device 101 comprises a frame element 10a, which represents a design component, and covers an outer edge region of one or more display elements 14a, which are embodied here as glass elements, in a viewing area S of the display device 101, as shown in Fig. 1 b). As shown in Fig. 1 a), three display elements 14a are inserted into the frame element 10a.

[0033] In Fig. 2 shows a display device 100 according to the invention. The display device 100 comprises a frame element 10 and a support element 11. The frame element 10 and a display element 14, which is embodied here as a glass element, are fastened to the support element 11. The display element 14 can, for example, be glued to the support element 11. The frame element 10 is fastened to the support element 11 via connecting elements 12 arranged on the frame element 10, which protrude from a base body 10a of the frame element 10 and which are each arranged in a receiving recess 13 of the support element 11. The base body 10a forms the frame-shaped basic structure of the frame element 10. The receiving recesses 13 form the connecting regions 11a of the support element 11. Fig. 2 shows an example of a connecting element 12 and a receiving recess 13, but several connecting elements 12 and receiving recesses 13 are arranged along a circumference of the frame element 10.

[0034] The connecting element 12 is designed as a protruding rib and has a crescent-shaped or arcuate section 12a and a straight section 12b adjacent thereto, resulting in a substantially J-shape in a side view. The receiving recess 13 is correspondingly complementary and also has a substantially J-shape, so that the connecting element 12 can be inserted into the receiving recess 13. In particular, the connecting element 12 can be arranged in the receiving recess 13 such that a cavity 15 is formed around the connecting element 12 within the receiving recess 13 for receiving an adhesive (not shown here).

[0035] The fixing of the frame element 10 to the support element 11 or the connecting element 12 in the receiving recess 13 by means of an adhesive 16 is in Fig. 3. The adhesive 16 fills the cavity 15 and thus ensures a firm connection between the frame element 10 and the support element 11. Advantageously, after inserting the connecting element 12 into the receiving recess 13 and into the liquid adhesive 16 arranged therein, the position of the frame element 10 relative to the support element 11 can be readjusted, since the cavity 15 provides a certain amount of freedom of movement for the connecting element 12. After the adhesive has hardened, the frame element 10 or the connecting element 12 is fixed in the final, desired position. This allows for particularly precise adjustment of gap dimensions.

[0036] In Fig. Figure 4 is a plan view of the frame element 10, showing one side of the frame element 10 on which the connecting elements 12 are arranged. The connecting elements 12 are arranged at substantially equal intervals along a circumference of the frame element 10. The connecting elements 12 are oriented outward with respect to their longitudinal axis.

[0037] In the Fig. 5 and Fig. 6 shows individual detailed views of the frame element 10 and the support element 11. In particular, Fig. 6 shows the design or shape of the receiving recess 13, with a crescent-shaped receiving area 13a and a straight receiving area 13b.

[0038] In Fig. 7 shows an embodiment of the display device 100, wherein the connecting elements 12 and the receiving recesses 13 have an alternative arrangement. The connecting elements 12 have a longitudinal axis 19, and the receiving recesses 13 have a longitudinal axis 18. The frame element 10 has a geometric center 20. The connecting elements 12 and the receiving recesses 13 are aligned along radial axes R relative to their respective longitudinal axes 18, 19. In other words, the longitudinal axes 18, 19 of all connecting elements 12 and all receiving recesses 13 run through the geometric center 20. This advantageously achieves an optimized force distribution of the connection between the frame element 10 and the support element 11 during temperature fluctuations.

[0039] Fig. Figure 8 shows an embodiment of the display device 100, wherein a first selection of connecting elements 12 and the receiving recesses 13 are aligned radially to the geometric center 20, analogous to the embodiment shown in Fig. 7 shown configuration. The frame element 10 has Fig. 8 has an opening 21 and is thus open. Connecting elements 12 and receiving recesses 13 are provided at the open ends 22 of the frame element 10, forming a second selection of connecting elements 12 and receiving recesses 13 that are not radially aligned with the geometric center 20. These connecting elements 12 and receiving recesses 13 have longitudinal axes 18, 19, which are in the Fig. 8 are essentially oriented toward the opening 21. However, alternative orientations are also conceivable, which can be determined in particular using the finite element method.

[0040] Fig. 9 a) to 9 c) show different configurations of the receiving recess 13. As in Fig. 9 a), the receiving recess 13 has a length L1 and the connecting element 12 has a length L2. The length L1 can vary depending on the position of the receiving recess 13 on the frame element 10 or depending on the distance from the geometric center 20. In particular, the receiving recess 13 has a relatively small length when the receiving recess 13 is arranged close to the geometric center 20, as in Fig. 9 b). With increasing distance from the geometric center 20, the length L1 increases, as shown in Fig. 9 c). The length L2 of the connecting element 12 is, as shown in the Fig. 9 a) to 9 c) shown, unchanged or constant.

Claims

[1] Display device (100), comprising a frame element (10) for covering an edge region of a display element (14) and comprising a carrier element (11) for fastening the display element (14) and the frame element (10) to the carrier element (11), wherein the frame element (10) has a plurality of connecting elements (12) protruding from a base body (12c) of the frame element (10) along its circumference, and wherein the carrier element (11) has a plurality of connecting regions (11a) which are designed for fastening the connecting elements (12), in particular by adhesive means. [2] Display device (100) according to claim 1, wherein the connecting elements (12) are each designed as a rib, in particular as a rib-like projection. [3] Display device (100) according to claim 2, wherein a thickness of at least one rib, in particular the thickness of the at least one rib in the connecting region (11a) between the respective rib and the base body (12a), is smaller than a thickness of the base body (12a) of the frame element (10), in particular the thickness of the base body (12a) in the connecting region (11a) between the respective rib and the base body (12a). [4] Display device (100) according to one of the preceding claims, wherein the connecting regions (11a) each comprise a receiving recess (13) for receiving one of the connecting elements (12), wherein the connecting elements (12) are fixed in the receiving recess (13), in particular by means of an adhesive (16). [5] Display device (100) according to claim 4, wherein each of the receiving recesses (13) is designed such that the connecting element (12) is surrounded by a cavity (15) when the connecting element (12) is arranged in the receiving recess (13), wherein in particular adhesive (16) is arranged in the cavity (15) for fixing the connecting element (12) in the receiving recess (13). [6] Display device (100) according to one of claims 4 or 5, wherein the frame element (10) has a geometric center (20), wherein the receiving recesses (13) and / or the connecting elements (12) each have a longitudinal extension with a longitudinal axis (18, 19), and wherein the respective longitudinal axes (18, 19) of at least a first selection of receiving recesses (13) and / or a first selection of connecting elements (12), in particular of all receiving recesses (13) and / or connecting elements (12), are oriented radially to the geometric center (20) of the frame element (10). [7] Display device (100) according to one of claims 4 to 6, wherein the receiving recesses (13) each have a longitudinal extension with a longitudinal axis (18), wherein the receiving recesses (13) each have a first length L1, wherein the receiving recesses (13) have different lengths L1 depending on a distance of the respective receiving recess (13) to the geometric center (20) of the frame element (10), wherein in particular the length L1 of the receiving recesses (13) increases with increasing distance to the geometric center (20) of the frame element (10), and / or wherein in particular the connecting elements (12) each have a second length L2 and the lengths L2 of all connecting elements (12) are constant. [8] Display device (100) according to one of claims 4 to 7, wherein the frame element (10) has an opening (21) at a location along the circumference, wherein the longitudinal axes (18) of a second selection of receiving recesses (13) and / or the longitudinal axes (19) of a second selection of connecting elements (12), which are arranged in the region of two free ends (22) of the frame element (10) in the region of the opening (21), are not oriented radially to a geometric center of the frame element. [9] Frame element (10) designed for use in a display device (100) according to one of the preceding claims. [10] Support element (11) designed for use in a display device (100) according to one of claims 1 to 8.

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