CN212112054U

CN212112054U - Vehicle-mounted display device

Info

Publication number: CN212112054U
Application number: CN202021186302.XU
Authority: CN
Inventors: 董唱; 韩锐; 崔栋; 张志鹏; 翟跃; 李文洋; 冷寿阳; 王丰平; 迟卫宁; 谭蕊
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-12-08
Anticipated expiration: 2030-06-23
Also published as: WO2021258902A1

Abstract

The application relates to the field of display, and provides a vehicle-mounted display device which comprises a display assembly, wherein the display assembly comprises a back plate and a main PCB, the back plate is rectangular, and the lower edge of the back plate is a short side of the rectangle; the main PCB is arranged on the back plate, the main PCB is in a long strip shape, the lower edge of the main PCB is a short edge of the long strip shape, the short edge of the main PCB is parallel to the short edge of the back plate, and a first gap is formed between the lower edge of the main PCB and the lower edge of the back plate; the rear cover is connected with the back plate and covers the main PCB; the first buffer piece is arranged between the back plate and the rear cover, is positioned in the first gap and is used for buffering acting force applied to the lower edge area of the back plate, close to the main PCB. By applying the application, the damping and buffering can be carried out on the larger acting force borne by the back plate, so that the yellowing phenomenon of the display panel after the vehicle-mounted display device is used for a long time is improved, and the display performance and the service life of the vehicle-mounted display device are improved.

Description

Vehicle-mounted display device

Technical Field

The invention relates to the technical field of display devices, in particular to a vehicle-mounted display device.

Background

In-vehicle display devices, particularly those of relatively large size (15 inches and above), the display panel may yellow when subjected to constant high-intensity vibrations during vehicle travel.

In the prior art, the phenomenon that a display panel yellows is usually improved by reducing the vibration strength of the display device, the specific mode comprises the strength of a support column between the display device and a vehicle body, and the fixing mode among the whole vehicle, the whole vehicle and the display device is changed, but the two modes are often high in cost and not beneficial to large-scale production.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least, provide an on-vehicle display device, include:

the display assembly comprises a back plate and a main printed circuit board, wherein the back plate is rectangular, and the lower edge of the back plate is the short side of the rectangle; the main printed circuit board is arranged on the back plate, the main printed circuit board is in a long strip shape, the lower edge of the main printed circuit board is a short edge of the long strip shape, the short edge of the main printed circuit board is parallel to the short edge of the back plate, and a first gap is formed between the lower edge of the main printed circuit board and the lower edge of the back plate;

the rear cover is connected with the back plate and covers the main printed circuit board;

the first buffer piece is arranged between the back plate and the rear cover, is positioned in the first gap and is used for buffering acting force applied to the lower edge area of the back plate, which is close to the main printed circuit board.

Optionally, the first buffer member is rectangular, a long side of the first buffer member is parallel to a short side of the backplane, and an edge of the short side of the first buffer member, which is close to the middle of the backplane, protrudes beyond an edge of the long side of the main printed circuit board, which is close to the middle of the backplane;

the distance between the lower edge of the first buffer piece and the lower edge of the back plate is 4mm-6mm, and the distance between the outer edge of the first buffer piece and the close outer edge of the back plate is 15mm-20 mm.

Optionally, the display assembly further includes a secondary printed circuit board disposed on the back plate and opposite to the main printed circuit board based on a vertical center line of the back plate; the auxiliary printed circuit board is positioned at the lower part of the back plate, and a second gap is formed between the lower edge of the auxiliary printed circuit board and the lower edge of the back plate;

the vehicle-mounted display device further comprises a second buffer piece, wherein the second buffer piece is arranged between the back plate and the rear cover, is positioned in the second gap and is used for buffering acting force applied to the lower edge area, close to the auxiliary printed circuit board, of the back plate.

Optionally, the second buffer member includes at least two second buffer members, one of the second buffer members is rectangular, and a long side of the rectangle is parallel to a short side of the back plate and is located near an outer edge of the secondary printed circuit board; and the two of the two are square and are positioned right below the auxiliary printed circuit board.

Optionally, a third gap is provided between the upper edge of the main printed circuit board and the upper edge of the back plate;

the vehicle-mounted display device further comprises two third buffer members, wherein the two third buffer members are arranged between the back plate and the rear cover and are located in the third gap, and the vertical center lines of the back plate are symmetrically arranged and used for buffering acting force applied to the upper edge area of the back plate.

Optionally, the third buffer member is rectangular, a long side of the rectangle is parallel to a short side of the back plate, a distance between an upper edge of the third buffer member and the upper edge of the back plate is 4mm to 6mm, a distance between an outer edge of the third buffer member and an outer edge of the back plate close to the outer edge of the third buffer member is 4mm to 6mm, and a distance between the two third buffer members is 55mm to 65 mm.

Optionally, the rear cover includes a stress dispersion area, the stress dispersion area is close to the lower edge of the rear cover and is communicated with the lower edge of the rear cover, so as to disperse the acting force between the lower edge of the rear cover and the back plate;

the vehicle-mounted display device further comprises a fourth buffer piece, wherein the fourth buffer piece is arranged between the back plate and the rear cover, is positioned in the stress dispersion area and is used for buffering acting force applied to the back plate in the stress dispersion area.

Optionally, the buffer comprises a silicone foam sheet.

Optionally, the silicone foam sheet is bonded to the back plate and/or the back cover.

Optionally, the display assembly further includes a light guide plate, a diameter of a dot of the light guide plate ranges from 200 μm to 300 μm, and a distance between two adjacent dots is 0.45mm to 0.5 mm.

The utility model discloses following beneficial effect has:

the on-vehicle display device that this embodiment provided, according to the atress distribution, set up first bolster between backplate and back lid, and first bolster be located the lower limb of main PCB board with in the first clearance between the lower limb of backplate, can carry out the damping buffering to the effort that the lower border region that is close to main PCB board of backplate received, with avoid or reduce because of on-vehicle display device's display panel atress is uneven, the decurrent effect of pulling that produces the liquid crystal in the display panel, and then reduce or avoid the liquid crystal to produce and warp, thereby improve on-vehicle display device and use the phenomenon that the back display panel yellows for a long time, then improve on-vehicle display device's display performance and life.

Drawings

Fig. 1 is a schematic structural diagram of an overall rear view of an in-vehicle display device provided in an embodiment of the present application;

fig. 2 is a schematic rear view (excluding a rear cover) of a display module according to an embodiment of the present disclosure;

fig. 3 is a schematic front view of a rear cover according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The following describes the technical solutions of the present application and how to solve the above technical problems in specific embodiments with reference to the accompanying drawings.

This application discovers at the in-process of studying vehicle-mounted display device, and vehicle-mounted display device appears the display panel yellow phenomenon after long-term the use reason lie in: on-vehicle display device receives the influence of mounting means and gravity effect, the lower part atress is great, make its whole atress uneven, and then make the display panel atress uneven, the inside tensile stress and the compressive stress that produces the lower part of display panel, then produce decurrent pulling effect to the liquid crystal in the display panel, and then make the liquid crystal produce certain deformation, and the colour through liquid crystal display has direct relation with the shape of liquid crystal, the liquid crystal receives to pull just to make display device show yellow after the effect warp, cause the visual effect that the display panel yellows promptly.

In view of the above reasons causing the display device to yellow, an embodiment of the present application provides a vehicle-mounted display device, please refer to fig. 1, fig. 2, and fig. 3, which are a schematic diagram of an overall rear view structure of the vehicle-mounted display device, a schematic diagram of a rear view structure of a display module 10, and a schematic diagram of a front view structure of a rear cover 20, respectively, where the vehicle-mounted display device includes the display module 10, the rear cover 20, and a plurality of buffering members, and the buffering members are disposed between a rear plate 11 and the rear cover 20, and located in the middle lower portion of the rear plate and the areas of the short edge of the rear plate, respectively, for buffering the acting.

The display module 10 may be any module for display that can be applied to an in-vehicle display device, and may include a display panel, a back plate 11, and a PCB (Printed Circuit Board). The back plate 11 may be understood as a part of the backlight, and as shown in fig. 1, the back plate 11 may be rectangular, and the lower edge of the back plate 11 is the short side of the rectangle. The PCB board is used to provide electrical connection for the in-vehicle display device, and may be disposed on a side of the back panel 11 away from the display panel (not shown in fig. 1). As shown in fig. 2, the PCB may include a main PCB 121 located at one side of the back plate 11 and a sub PCB 122 located at the other side of the back plate and close to the lower edge of the back plate 11, the main PCB 121 may be in a shape of a long strip (as shown in fig. 2, may be in an irregular shape with different upper and lower widths), the lower edge of the main PCB 121 is a short side of the long strip, the short side of the main PCB 121 is parallel to the short side of the back plate 11, and a first gap is formed between the lower edge of the main PCB 121 and the lower edge of the back plate 11. The sub PCB 122 may be disposed on the back plate 11 opposite to the main PCB 121 based on a vertical center line of the back plate 11; the sub PCB 122 may be located at a lower portion of the back plate 11, and a second gap may be provided between a lower edge of the sub PCB 122 and a lower edge of the back plate 11.

The rear cover 20 may be connected to the rear panel 11, cover the PCBs (including the main PCB 121 and the sub PCB 122), protect the entire display assembly 10, particularly, the PCBs, and may be fixedly mounted on the interior trim of the vehicle body through the rear cover 20.

After the vehicle-mounted display device is vertically or obliquely installed on the vehicle body, the back panel 11 is influenced by gravity, the lower part of the back panel is stressed greatly, and the back panel 11 is fixed with the rear cover 20 at the edge through a bolt (or other fasteners), so that the lower edge of the back panel 11 is stressed greatly and the stress situation is complicated. Therefore, the buffering member may include at least a first buffering member 31, and the first buffering member 31 is disposed between the back plate 11 and the rear cover 20 and located in the first gap for buffering the acting force applied to the lower area of the back plate 11 close to the main PCB board 121.

The vehicle-mounted display device provided by the embodiment, according to the stress distribution, the first buffer member 31 is arranged between the back plate 11 and the rear cover 20, the first buffer member 31 is positioned in a first gap between the lower edge of the main PCB board 121 and the lower edge of the back plate 11, the acting force of the back plate 11 close to the lower edge area of the main PCB board 121 can be subjected to vibration damping and buffering, uneven stress of a display panel of the vehicle-mounted display device is avoided or reduced, downward dragging effect on liquid crystal in the display panel is generated, deformation of the liquid crystal is further reduced or avoided, the yellowing phenomenon of the display panel after the vehicle-mounted display device is used for a long time is improved, and the display performance and the service life of the vehicle-mounted display device are further improved.

It should be noted that the vehicle-mounted display device provided in the present embodiment may be applied not only to an automobile but also to other vehicles, ships, or similar devices, as long as the yellowing phenomenon of the display panel after long-term use of the display device can be improved by adding a buffer for vibration reduction. Namely, the design scheme of adding the buffer piece to the vehicle-mounted display device can also have certain guiding significance to other display devices.

Specifically, the first buffering member 31 may have a rectangular sheet structure, a long side of the first buffering member 31 may be parallel to a short side of the backplate 11, and an edge of the short side of the first buffering member 31 near the middle of the backplate 11 may protrude beyond an edge of the long side of the main PCB 121 near the middle of the backplate 11. The distance between the lower edge of the first cushion member 31 and the lower edge of the back plate 11 may be 4mm to 6mm, and the distance between the outer edge of the first cushion member 31 and the proximate outer edge of the back plate 11 may be 15mm to 20 mm. So, first bolster 31 can avoid screw and main PCB board 121 and other components and parts (like lamp strip flexible circuit board), rationally sets up in the first clearance between the lower limb of main PCB board 121 and the lower limb of backplate 11 to the realization is to the backplate 11 the effort that the lower edge region that is close to main PCB board 121 receives carries out the damping buffering. Preferably, the distance between the lower edge of the first cushion 31 and the lower edge of the back plate 11 may be 5mm, the distance between the outer edge of the first cushion 31 and the adjacent outer edge of the back plate 11 may be 17mm, the length thereof may be 60mm, the width thereof may be 7mm, and the thickness thereof may be 12mm ± 1 mm.

In a specific embodiment of the present application, since the secondary PCB is connected to the lower portion of the back plate 11, the lower edge of the back plate 11 is stressed more and more complicated, and therefore, the buffering member may further include a second buffering member 32, and the second buffering member 32 may be disposed between the back plate 11 and the rear cover 20 and located in the second gap to buffer the acting force applied to the lower edge area of the back plate 11 close to the secondary PCB.

Specifically, the second buffer 32 may include at least two, one of which may be rectangular, and a long side of the rectangle may be parallel to a short side of the back plate 11 and may be located near an outer edge of the secondary PCB; two of the flexible circuit boards can be square and are positioned right below the auxiliary printed circuit board, for example, between two flexible circuit boards of the light bar connected on the auxiliary printed circuit board. So, can set up second bolster 32 under the condition that does not interfere with components and parts such as lamp strip flexible circuit board and vice PCB board 122 and installation fastener to the realization is close to the regional atress of vice PCB board at backplate 11 lower limb and is cushioned backplate 11. More specifically, the rectangular second cushion 32 may have a length of 10mm and a width of 8 mm. The side length of the square second cushion 32 is 10mm, and both of them may be 12mm ± 1mm in thickness.

In another embodiment of the present invention, a third gap may be formed between the upper edge of the main PCB 122 and the upper edge of the back plate 11. The vehicle-mounted display device may further include two third cushion members 33, and the two third cushion members 33 may be disposed between the rear panel 11 and the rear cover 20 and located in the third gap, and may be symmetrically disposed based on a vertical center line of the rear panel 11 to buffer an acting force applied to an upper edge area of the rear panel.

In this embodiment, in practical application, the back plate 11 is usually used in a horizontal and vertical manner, and after the first buffer 31 and the second buffer 32 are added to the lower edge, the surface tension of the edge of the OCR adhesive (Optical Clear Resin, which can fill the gap between the display panel and the transparent protective layer and between the display panel and the liquid crystal module) in the back plate 11 is inconsistent with the inside, and the stress of the short edge is often more concentrated than that of the long edge, so the third buffer 33 can be further disposed in the upper edge region of the back plate 11 to buffer the stress of the upper edge of the back plate 11, thereby preventing the display panel from yellowing due to the phenomena of glue failure or uneven glue thickness during vibration. And the two third cushion members 33 are symmetrically disposed at the upper edge region of the back plate 11 to avoid the mounting position of the middle portion of the upper edge of the back plate 11.

Further, the third cushion member 33 may have a rectangular shape, a long side of the rectangular shape may be parallel to a short side of the back plate 11, a distance between an upper edge of the third cushion member 33 and the upper edge of the back plate 11 may be 4mm to 6mm, a distance between an outer edge of the third cushion member 33 and an adjacent outer edge of the back plate 11 may be 4mm to 6mm, and a distance between two third cushion members 33 may be 55mm to 65 mm. Preferably, the distance between the upper edge of the third cushion 33 and the upper edge of the back plate 11 may be 5mm, the distance between the outer edge of the third cushion 33 and the outer edge of the back plate 11 adjacent thereto may be 5mm, the distance between two third cushions 33 may be 60mm, the length of the third cushion 33 may be 90mm, the width may be 5mm, and the thickness may be 12mm ± 1 mm. By providing two third cushion members 33, it is possible to achieve a cushion effect on the upper edge of the back plate 11, and to prevent the third cushion members 33 from interfering with the mounting fastener, etc.

In another embodiment of the present application, the rear cover 20 may include a stress dispersion area 21, and the stress dispersion area 21 may be adjacent to a lower edge of the rear cover 20 and communicate with a lower edge of the rear cover 20 for dispersing a force between the lower edge of the rear cover 20 and the back plate 11. The buffering member may further include a fourth buffering member 34, and the fourth buffering member 34 may be disposed between the backplate 11 and the rear cover 20 and located in the stress dispersion area 21 for buffering the acting force applied to the backplate 11 in the stress dispersion area 21.

In the present embodiment, as shown in fig. 3, the rear cover 20 is generally a hollow structure, the wider edge portion covers and protects the PCB, and a protrusion is disposed around the hollow area, and the protrusion abuts against the back plate 11 to fix the display module 10. Because the region of the lower edge of the back plate 11 is stressed more and more complicated, and the influence of the lug on the stress of the back plate 11 is also larger, the lug near the lower edge can be removed on the premise of not influencing the fixation of the display assembly 10, and meanwhile, the contact area between the lug and the back plate 11 is increased, namely, the back cover 20 can comprise a stress dispersion region 21, the stress dispersion region 21 can be close to the lower edge of the back cover 20 (needing to avoid a PCB (printed circuit board) and other connecting positions), the back cover 20 can be contacted with the back plate 11 in the stress dispersion region 21, so that the stress dispersion is facilitated, the stress concentration caused by the contact of the lug (the lower edge lug) and the back plate 11 is avoided, and even the yellowing phenomenon of the display panel is caused. The fourth cushion member 34 is added to the contact region 21 to disperse the contact stress, and further cushion and damp the in-vehicle display device.

Specifically, the length of the fourth cushion 34 may be 130mm, the width may be 20mm, and the thickness may be 11mm ± 1 mm.

In an embodiment of the present invention, each of the buffering members (including the first buffering member 31, the second buffering member 32, the third buffering member 33, and the fourth buffering member 34) may include a silicone foam sheet. Because the service temperature range of the silica gel foaming sheet is usually-40-100 ℃, and the silica gel foaming sheet is a tasteless, nontoxic and better wear-resistant material, in view of the above advantages of the silica gel foaming sheet, the buffer member can be a silica gel foaming sheet (such as a T-type gray silica gel foaming sheet of a certain manufacturer) to meet the increasingly strict conditions of vehicle reliability (such as temperature resistance of-40-100 ℃, vibration resistance frequency of 1 Hz-1000 Hz, and the like).

It should be noted that the buffer member in the present embodiment is not limited to the silicone foam sheet, and other conventional vibration damping materials, such as foam, silicone strips, pressing columns, telescopic columns, and buffer springs, may be used to damp the liquid crystal display panel, as long as the buffer member is disposed between the back plate 11 and the rear cover 20, and can buffer the force applied to the back plate 11, and can satisfy the reliability condition of the vehicle rule.

Specifically, the silicone foam sheet may be bonded to the back plate 11 or the rear cover 20, or may be bonded to both surfaces, one surface of which is bonded to the back plate 11 and the other surface of which is bonded to the rear cover 20. Preferably, the silicone foam sheet can be adhered to the back plate 11 only, and is adhered to the back cover 20 relatively, so that the buffer effect on the back plate 11 can be further improved; the two opposite surfaces are bonded, so that the disassembling, assembling and repairing processes can be simplified.

It should be noted that the specific positions and sizes of the above-mentioned buffering members are only some specific embodiments of the present embodiment, and the present embodiment is not limited thereto, and the buffering members may be added at any required places according to the actual stress situation of the vehicle-mounted display device. For example, when the vehicle-mounted display device adopts a horizontal screen, the long side of the vehicle-mounted display device is in the vertical direction, the short side of the vehicle-mounted display device is in the left-right direction, the lower edge is still stressed greatly and concentrated, and a buffer piece can be arranged on the lower edge. However, the stress concentration is not obvious due to the large size of the upper edge, and a buffer member can be omitted according to actual conditions. At this time, the narrow side is located in the left-right direction, and no significant stress concentration is generated, and a buffer member may not be provided here.

In another embodiment of the present application, the display assembly 10 may further include a light guide plate, and the diameter of the dots of the light guide plate may range from 200 μm to 300 μm (the diameters of all the dots may be the same, or may be different values within this range), so as to increase the size of the dots of the light guide plate to improve the wear resistance of the dots. The spacing between two adjacent dots can be 0.45mm-0.5mm, and preferably, the spacing between two adjacent dots can be 0.48 mm.

In practical applications, the light guide plate generally functions to guide light to a direction required by a designer through light guide dots, and the working principle is as follows: the optical-grade acrylic sheet is used for absorbing light emitted from the light source, the light stays on the surface of the optical-grade acrylic sheet, when the light reaches each mesh point, reflected light can be diffused towards each angle, and then the reflected light is damaged and is emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various net points with different densities and sizes. The size and number of the dots can affect the optical performance of the light guide plate, and particularly, the optical performance of the light guide plate is better (the emitted light is more uniform) if the dots are small and the number of the dots is large in the light guide plate with the same size; and the optical performance of the light guide plate is slightly poor if the mesh points are large and small. For the vehicle-mounted display device, because the vehicle-mounted display device is in a high-intensity vibration condition for a long time, the mesh points are easy to rub against the reflective sheet (another element adjacent to the light guide plate in the display assembly 10) under high-frequency vibration, abrasion and the like are caused, and then white spots and the like appear on the display panel of the vehicle-mounted display device. Therefore, for the vehicle-mounted display device, the density and size of the dots not only affect the optical performance of the light guide plate, but also affect the wear resistance of the light guide plate. That is, the light guide plate with the same size has small and large number of mesh points, so that the light guide plate has good optical performance but poor wear resistance. And the mesh points are large and small in quantity, so that the optical performance of the light guide plate is slightly poor, but the wear resistance is better. For example, the existing light guide plate mold adopts a laser process, the mesh point size of the laser process is 65-75 μm (micrometer), the mesh point size is invisible to naked eyes, the mesh point size is easy to rub a reflector plate under high-frequency vibration, abrasion is caused, a scratch with the length of 10mm (millimeter) can completely destroy dozens of mesh points, the optical performance of the destroyed mesh point is damaged, and finally an obvious visible white spot is formed. In the embodiment, the light guide plate mesh mold process is changed into etching, the size of the etching mesh is 200-300 μm, and the light guide plate mesh of 200-300 μm can be obtained, the size of the light guide plate mesh is about 5 times of that before the change, and the light guide plate mesh is obviously visible to naked eyes. When large dots face the same scratch (for example, the scratch with the length of 10 mm), one dot cannot be completely damaged, the optical performance is not obviously affected, and the display panel of the vehicle-mounted display device can be free from white spots, namely, the problem that the display panel of the vehicle-mounted display device in the prior art is subjected to vibration and then is white spots is solved.

It should be noted that, the embodiment is not limited to the light guide plate mesh points of 200 μm to 300 μm, but it may also be smaller than 200 μm or larger than 300 μm, as long as the wear resistance of the light guide plate mesh points can be improved, and the optical performance is not significantly affected. In addition, the embodiment does not limit the manufacturing of the light guide plate mesh point mold only by adopting the etching process, and can also adopt the deposition or printing process and other processes as long as the light guide plate mesh points with the required size can be formed.

As shown in fig. 1 and 3, the rear cover 20 may further include a plurality of heat dissipation holes 22 for dissipating heat from the PCB covered by the rear cover 20.

In addition, the real-time simulation can be carried out through a vibration test, so that the performance and physical changes of the display panel of the vehicle-mounted display device after long-term use can be reflected more accurately, and the buffer parts are arranged more pertinently at the positions where the display panel is easy to yellow through the detection result, so that a more effective vibration reduction effect can be obtained. For example, the vehicle-mounted display device to be detected can be installed on a vibration test bed, the actual working condition of the vehicle-mounted display device is simulated through a vibration test, the vibration frequency of each position of the vehicle-mounted display device and the performance of the vehicle-mounted display device after long-term use are tested, and the test shows that the display panel can be yellowed after long-term use of the vehicle-mounted display device with a certain size (for example, 17 inches) under the vibration frequency of 1000 hertz. And then arranging a buffer part at a corresponding position according to the test result, and then carrying out a vibration test on the vehicle-mounted display device provided with the buffer part, wherein under the same vibration condition, the test result shows that the vehicle-mounted display device added with the buffer part does not have the phenomenon that the display panel is yellow.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. An in-vehicle display device characterized by comprising:

the display assembly comprises a back plate and a main printed circuit board, wherein the back plate is rectangular, and the lower edge of the back plate is the short side of the rectangle; the main printed circuit board is arranged on the back plate, the main printed circuit board is in a long strip shape, the lower edge of the main printed circuit board is a short strip-shaped edge, the short edge of the main printed circuit board is parallel to the short edge of the back plate, and a first gap is formed between the lower edge of the main printed circuit board and the lower edge of the back plate;

2. The vehicle-mounted display device of claim 1, wherein the first buffer member is rectangular, a long side of the first buffer member is parallel to a short side of the back plate, and an edge of the short side of the first buffer member, which is close to the middle of the back plate, protrudes beyond an edge of the long side of the main printed circuit board, which is close to the middle of the back plate;

3. The on-board display device of claim 1, wherein the display assembly further comprises a sub-printed circuit board disposed on the back panel and disposed opposite the main printed circuit board based on a vertical centerline of the back panel; the auxiliary printed circuit board is positioned at the lower part of the back plate, and a second gap is formed between the lower edge of the auxiliary printed circuit board and the lower edge of the back plate;

4. The vehicular display device according to claim 3, wherein the second buffer member includes at least two buffer members, one of which is rectangular, and a long side of the rectangle is parallel to a short side of the back plate and is located near an outer side edge of the secondary printed circuit board; and the two of the two are square and are positioned right below the auxiliary printed circuit board.

5. The in-vehicle display device according to claim 1, wherein a third gap is provided between an upper edge of the main printed circuit board and an upper edge of the back panel;

6. The vehicular display device according to claim 5, wherein the third buffer member has a rectangular shape, the long side of the rectangular shape is parallel to the short side of the back plate, the distance between the upper edge of the third buffer member and the upper edge of the back plate is 4mm to 6mm, the distance between the outer edge of the third buffer member and the outer edge of the back plate adjacent to the outer edge of the third buffer member is 4mm to 6mm, and the distance between the two third buffer members is 55mm to 65 mm.

7. The vehicle-mounted display device according to claim 1, wherein the rear cover includes a stress dispersion region that is adjacent to a lower edge of the rear cover and communicates with a lower edge of the rear cover, for dispersing a force between the lower edge of the rear cover and the back panel;

8. The on-vehicle display device according to any one of claims 1 to 7, wherein the buffer member includes a silicone foam sheet.

9. The in-vehicle display device according to claim 8, wherein the silicone foam sheet is bonded to the back plate and/or the rear cover.

10. The vehicle-mounted display device according to any one of claims 1 to 7, wherein the display assembly further comprises a light guide plate, the diameter of the mesh points of the light guide plate ranges from 200 μm to 300 μm, and the distance between two adjacent mesh points ranges from 0.45mm to 0.5 mm.