WO2021258902A1

WO2021258902A1 - Vehicle-mounted display device

Info

Publication number: WO2021258902A1
Application number: PCT/CN2021/093617
Authority: WO
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: 京东方科技集团股份有限公司; 北京京东方光电科技有限公司
Priority date: 2020-06-23
Filing date: 2021-05-13
Publication date: 2021-12-30
Also published as: CN212112054U

Abstract

The present invention relates to the field of display, and provides a vehicle-mounted display device, comprising a display assembly, a rear cover, and a first cushion member. The display assembly comprises a backplate and a main PCB. The backplate is in a rectangle shape, and the lower edge of the backplate is a short edge of the rectangle. The main PCB is provided on the backplate, the main PCB is in a long strip shape, and 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 backplate, and a first gap is provided between the lower edge of the main PCB and the lower edge of the backplate. The rear cover is connected to the backplate, and covers the main PCB. The first cushion member is provided between the backplate and the rear cover, located in the first gap, and used for cushioning the acting force applied to the lower area of the backplate close to the main PCB. According to the present invention, large acting force applied to the backplate can be damped and cushioned, so as to improve yellowing of the display panel of the vehicle-mounted display device after long-term use, thereby improving the display performance and service life of the vehicle-mounted display device.

Description

Vehicle display device

Technical field

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

Background technique

Vehicle-mounted display devices, especially larger-sized (for example, 15-inch and above) vehicle-mounted display devices, may experience yellowing of the display panel due to continuous high-intensity vibration during vehicle driving.

In the prior art, the yellowing of the display panel is usually reduced by reducing the intensity of vibration received by the display device. Specific methods may include enhancing the strength of the support column between the display device and the vehicle body, and changing the fixing method between the entire vehicle, the entire machine, and the display device, and so on. However, these two methods are often costly, which is not conducive to large-scale production.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes a vehicle-mounted display device, including: a display assembly, a back cover, and a first buffer. The display assembly includes a backplane and a main printed circuit board, the backplane is rectangular, the main printed circuit board is disposed on the backplane, the main printed circuit board is elongated, and the There is a first gap between the lower edge of the main printed circuit board and the lower edge of the backplane. The back cover is connected with the back plate and covers the main printed circuit board. The first buffer member is arranged between the back plate and the back cover, and is located in the first gap, and is used to buffer the lower area of the back plate close to the main printed circuit board. The force.

In an optional embodiment, the lower edge of the backplane is the short side of the rectangle, the lower edge of the main printed circuit board is the short side of the long strip, and the main printed circuit The short side of the board is parallel to the short side of the back board.

In an optional embodiment, the first buffer member is rectangular, the long side of the first buffer member is parallel to the short side of the back plate, and the first buffer member is close to the middle of the back plate The short edge of the main printed circuit board protrudes from the long edge of the main printed circuit board close to the middle of the back plate; and the distance between the lower edge of the first buffer member and the lower edge of the back plate is 4mm- 6mm, the distance between the outer edge of the first buffer member and the adjacent outer edge of the back plate is 15mm-20mm.

In an optional embodiment, the display assembly further includes a sub-printed circuit board, the sub-printed circuit board is disposed on the backplane, and is connected to the main printed circuit board based on the backplane The vertical center lines are arranged oppositely; the auxiliary printed circuit board is located at the lower part of the backplane, and there is a second gap between the lower edge of the auxiliary printed circuit board and the lower edge of the backplane; and The vehicle-mounted display device also includes a second buffer member, which is arranged between the back plate and the back cover, and is located in the second gap, for buffering the proximity of the back plate to the The force received by the lower area of the sub-printed circuit board.

In an optional embodiment, the vehicle-mounted display device includes at least two of the second buffer members, one of the second buffer members is rectangular, and the long side of the rectangle is parallel to the short side of the backplane, and It is located close to the outer edge of the auxiliary printed circuit board; the other second buffer member has a square shape and is located directly under the auxiliary printed circuit board.

In an optional embodiment, there is a third gap between the upper edge of the main printed circuit board and the upper edge of the back plate; and the vehicle-mounted display device further includes two third buffers, two The third buffer members are all arranged between the back plate and the back cover, and are located in the third gap, and are symmetrically arranged based on the vertical center line of the back plate, for buffering the back plate The force on the upper area of the

In an optional embodiment, the third buffer member is rectangular, the long side of the rectangle is parallel to the short side of the back plate, and the upper edge of the third buffer member is between the upper edge of the back plate and the upper edge of the back plate. The distance is 4mm-6mm, the distance between the outer edge of the third buffer member and the adjacent outer edge of the back plate is 4mm-6mm, and the distance between the two third buffer members is 55mm -65mm.

In an optional embodiment, the back cover includes a stress dispersion area that is close to the lower edge of the back cover and communicates with the lower edge of the back cover for dispersing The force between the lower side and the back plate; and the vehicle-mounted display device further includes a fourth buffer member, the fourth buffer member is disposed between the back plate and the back cover, and is located at the stress The dispersion area is used to buffer the force received by the back plate in the stress dispersion area.

In an optional embodiment, the buffer member includes a silicone foam sheet.

In an optional embodiment, the silicone foam sheet is adhered to the back plate and/or the back cover.

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

In the vehicle-mounted display device provided by this embodiment, according to the force distribution, a first buffer member is provided between the back plate and the back cover, and the first buffer member is located between the lower edge of the main PCB board and the back plate In the first gap between the lower edges. In this way, the force on the lower area of the backplane close to the main PCB can be damped and buffered, so as to avoid or reduce the uneven force on the display panel of the vehicle-mounted display device, and the downward impact on the liquid crystal in the display panel. The drag effect. Furthermore, it is possible to reduce or avoid the deformation of the liquid crystal, thereby improving the yellowing of the display panel of the vehicle-mounted display device after long-term use, thereby improving the display performance and service life of the vehicle-mounted display device.

Description of the drawings

FIG. 1 is a schematic rear view of the entire vehicle-mounted display device provided by an embodiment of the disclosure;

Fig. 1 is a schematic rear view of a display assembly provided by an embodiment of the present disclosure (not including a back cover);

Fig. 3 is a schematic front view of a back cover provided by an embodiment of the disclosure.

detailed description

The present disclosure will be described in detail below. Examples of the embodiments of the present disclosure are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar components or components with the same or similar functions. In addition, if a detailed description of the known technology is unnecessary for the illustrated feature of the present disclosure, it will be omitted. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present disclosure, and cannot be construed as limiting the present disclosure.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as those commonly understood by those of ordinary skill in the art to which this disclosure belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and unless specifically defined as here, they will not be idealized or overly Explain the formal meaning.

Those skilled in the art can understand that, unless specifically stated, the singular forms "a", "an" and "the" used herein may also include plural forms. It should be understood that when we refer to an element 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. In addition, “connected” or “coupled” used herein may include wireless connection or wireless coupling. The term "and/or" as used herein includes all or any unit and all combinations of one or more of the associated listed items.

The technical solutions of the present disclosure and how the technical solutions of the present disclosure solve the above technical problems will be described in detail below with specific embodiments in conjunction with the accompanying drawings.

In the process of researching on-vehicle display devices, it was discovered that after long-term use of the vehicle-mounted display devices, the display panel turns yellow. This is because the vehicle-mounted display device is affected by the installation method and the effect of gravity, and the lower part receives a relatively large force, which makes the overall force unevenly, thereby causing uneven force on the display panel. The lower part of the display panel generates tensile stress and the upper part of the compressive stress, which causes a downward drag on the liquid crystal in the display panel, thereby causing a certain deformation of the liquid crystal. The color displayed by the liquid crystal is directly related to the shape of the liquid crystal. After the liquid crystal is deformed by the drag effect, the display device displays yellow, that is, the visual effect of the yellow display panel is caused.

In view of the foregoing causes of yellowing of the display device, an embodiment of the present disclosure provides a vehicle-mounted display device. In the drawings, FIG. 1, FIG. 2 and FIG. 3 are respectively a schematic rear view of the entire vehicle display device, a schematic rear view of the display assembly 10 and a schematic front view of the rear cover 20. As shown in the figure, the vehicle-mounted display device includes a display assembly 10, a back cover 20, and a plurality of buffers. The buffers are arranged between the back plate 11 and the back cover 20, and are respectively located at the middle and lower sides of the back plate and on the short edge of the back plate. The area is used to buffer the force received by the back plate 11.

The display component 10 may be any component for display that can be applied to an in-vehicle display device. For example, the display assembly 10 may include a display panel, a backplane 11, and a printed circuit board (Printed Circuit Board, printed circuit board). In an exemplary embodiment, the backplane 11 can be understood as a part of the backlight source. 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 connections for the vehicle-mounted display device, and may be arranged on the side of the backplane 11 away from the display panel (not shown in FIG. 1). As shown in FIG. 2, the PCB board may include a main PCB board 121 located on one side of the back board 11 and a secondary PCB board 122 located on the other side of the back board and close to the lower edge of the back board 11. The main PCB board 121 may be a long strip (as shown in FIG. 2, it may be an irregular long strip with different upper and lower widths). The lower edge of the main PCB board 121 is a long short side. The short side of the main PCB board 121 is parallel to the short side of the backplane 11. There is a first gap between the lower edge of the main PCB board 121 and the lower edge of the back plate 11. The secondary PCB board 122 may be disposed on the backplane 11 and disposed opposite to the main PCB board 121 based on the vertical center line of the backplane 11; the secondary PCB board 122 may be located at the lower part of the backplane 11, and the lower edge of the secondary PCB board 122 There may be a second gap between the lower edges of the back plate 11.

The back cover 20 can be connected to the back plate 11, and cover the PCB board (including the main PCB board 121 and the sub PCB board 122), and protect the entire display assembly 10, especially the PCB board. The vehicle display can also be displayed through the back cover 20. The device is fixedly installed on the car body interior.

After the vehicle-mounted display device is installed on the vehicle body vertically or obliquely, the back plate 11 is affected by gravity, and the lower part is subjected to greater force. In addition, the edge of the back plate 11 is usually fixed to the back cover 20 by screws (or other fasteners), so the lower edge of the back plate 11 is often subject to greater force and more complex forces. Therefore, the buffer member may include at least a first buffer member 31, which is disposed between the back plate 11 and the rear cover 20, and is located in the first gap, for buffering the back plate 11 close to the main PCB board 121 The force on the lower area.

In the vehicle-mounted display device provided by this embodiment, according to the force distribution, a first buffer member 31 is provided between the back plate 11 and the back cover 20. The first buffer member 31 is located in the first gap between the lower edge of the main PCB board 121 and the lower edge of the back board 11, and can dampen the force received by the lower area of the back board 11 close to the main PCB board 121 Buffer to avoid or reduce the uneven force on the display panel of the vehicle-mounted display device. In this way, the downward drag effect on the liquid crystal in the display panel can be reduced or avoided, thereby reducing or avoiding the deformation of the liquid crystal, thereby improving the yellowing of the display panel after long-term use of the vehicle display device, thereby improving the vehicle display device Display performance and service life.

It should be noted that the on-board display device provided in this embodiment may not be limited to being applied to automobiles, but can also be applied to other vehicles, ships, or similar equipment, as long as the display device can be improved by adding a buffer for damping. The display panel turns yellow after long-term use.

Specifically, the first buffer member 31 may be a rectangular sheet structure. The long side of the first buffer member 31 may be parallel to the short side of the back plate 11, and the short side edge of the first buffer member 31 close to the middle of the back plate 11 may be from the long side edge of the main PCB board 121 close to the middle of the back plate 11. protrude. The distance between the lower edge of the first buffer member 31 and the lower edge of the back plate 11 may be 4 mm-6 mm. The distance between the outer edge of the first buffer member 31 and the adjacent outer edge of the back plate 11 may be 15mm-20mm. In this way, the first buffer member 31 can avoid the screws and the main PCB board 121 and other components (such as the light bar flexible circuit board), and is reasonably arranged between the lower edge of the main PCB board 121 and the lower edge of the back plate 11. In the first gap, the force received by the lower region of the backplane 11 close to the main PCB board 121 can be damped and buffered. In an alternative embodiment, the distance between the lower edge of the first buffer member 31 and the lower edge of the back plate 11 may be 5 mm, and the distance between the outer edge of the first buffer member 31 and the adjacent outer edge of the back plate 11 The distance between, may be 17mm, wherein the length of the first buffer member 31 may be 60mm, the width may be 7mm, and the thickness may be 12mm±1mm.

In a specific embodiment of the present disclosure, since the secondary PCB board is connected to the lower part of the back plate 11, the lower edge of the back plate 11 is more stressed and more complicated. Therefore, the buffer member may further include a second buffer member 32. The second buffer member 32 may be disposed between the back plate 11 and the back cover 20 and located in the second gap to buffer the force received by the lower area of the back plate 11 close to the secondary PCB board.

Specifically, the vehicle-mounted display device according to an embodiment of the present disclosure may include at least two second buffer members 32. One of the second buffer members 32 may be rectangular, the long side of the rectangle may be parallel to the short side of the backplane 11, and may be located close to the outer edge of the secondary PCB board; the other second buffer member 32 may be square, and It is located directly below the secondary printed circuit board, such as between two flexible circuit boards connected to the secondary PCB board. In this way, the second buffer member 32 can be provided without interfering with the light bar flexible circuit board, the auxiliary PCB board 122 and other components and the installation fasteners, so as to realize the area close to the auxiliary PCB board at the lower edge of the back plate 11 The force of the back plate 11 is buffered. More specifically, the rectangular second buffer member 32 may have a length of 10 mm and a width of 8 mm. The side length of the square second buffer member 32 is 10 mm, and the thickness of both may be 12 mm±1 mm.

In another specific embodiment of the present disclosure, there may be a third gap between the upper edge of the main PCB board 122 and the upper edge of the back plate 11. The vehicle-mounted display device may also include two third buffer members 33. The two third buffer members 33 may both be arranged between the back plate 11 and the back cover 20, and located in the third gap, and may be symmetrically arranged based on the vertical center line of the back plate 11 to buffer the upper side area of the back plate. The force experienced.

In practical applications, the backplane 11 according to this embodiment usually adopts a "horizontal screen and vertical use" mode. After adding the above-mentioned first buffer member 31 and second buffer member 32 to the lower edge, the OCR (Optical Clear Resin, optically transparent resin) in the backplane 11 can fill the gap between the display panel and the transparent protective layer and the liquid crystal module. The surface tension of the edge of the void is inconsistent with the inside, and the stress on the short side of the back plate 11 tends to be more concentrated than the long side. Therefore, two third buffer members 33 can also be provided on the upper edge area of the back plate 11 to buffer the force on the upper edge of the back plate 11 to avoid the display panel from being broken due to the phenomenon of glue opening or uneven glue thickness during vibration. Yellow. The two third buffer members 33 are symmetrically arranged on the upper edge area of the back plate 11 to avoid the installation position at the middle of the upper edge of the back plate 11.

Further, the third buffer member 33 may be rectangular, and the long side of the rectangle may be parallel to the short side of the back plate 11. The distance between the upper edge of the third buffer 33 and the upper edge of the back plate 11 may be 4 mm-6 mm. The distance between the outer edge of the third buffer 33 and the adjacent outer edge of the back plate 11 may be 4mm-6mm. The distance between the two third buffer members 33 may be 55mm-65mm. In an alternative embodiment, the distance between the upper edge of the third buffer member 33 and the upper edge of the back plate 11 may be 5 mm, and the outer edge of the third buffer member 33 and the outer edge of the back plate 11 that are close to it may be 5 mm. The distance between the two third buffer members 33 may be 5 mm, and the distance between the two third buffer members 33 may be 60 mm, wherein the length of the third buffer member 33 may be 90 mm, the width may be 5 mm, and the thickness may be 12 mm±1 mm. By providing two third buffer members 33, the buffer effect on the upper edge of the back plate 11 can be realized, and the interference between the third buffer member 33 and the installation fasteners can be avoided.

In another specific embodiment of the present disclosure, the back cover 20 may include the stress dispersion area 2. The stress dispersion area 21 may be close to the lower edge of the back cover 20 and communicate with the lower edge of the back cover 20 to disperse the force between the lower edge of the back cover 20 and the back plate 11. To this end, the vehicle-mounted display device according to the embodiment of the present disclosure may further include a fourth buffer member 34. The fourth buffer member 34 may be disposed between the back plate 11 and the back cover 20 and located in the stress dispersion area 21 for buffering the back. The force received by the plate 11 in the stress dispersion area 21.

In this embodiment, as shown in FIG. 3, the back cover 20 is usually a hollowed-out structure in the middle, the wider edge part covers and protects the PCB board, and there are lugs on the periphery of the hollowed-out middle area. The lugs abut against the back plate 11 to fix the display assembly 10. Since the area of the lower edge of the back plate 11 is subject to greater force and complexity, the lugs also have a greater influence on the force of the back plate 11. In an alternative embodiment, without affecting the fixation of the display assembly 10, the lugs near the lower edge of the back cover 20 can be removed, and at the same time, the contact between the lower edge of the back cover 20 and the back plate 11 can be increased. area. In other words, the back cover 20 may include a stress dispersion area 21, and the stress dispersion area 21 may be close to the lower edge of the back cover 20 (need to avoid the PCB board and other connection positions). The back cover 20 can be in contact with the back plate 11 in the stress dispersion area 21 to facilitate stress dispersion and avoid the contact between the lugs (lower edge lugs) and the back plate 11 causing stress concentration and even yellowing of the display panel. A fourth buffer member 34 is added to the contact area 21 to disperse the contact stress and further buffer and dampen the vehicle-mounted display device.

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

In a specific embodiment of the present disclosure, each of the aforementioned buffer members (including the first buffer member 31, the second buffer member 32, the third buffer member 33, and the fourth buffer member 34) may include a silicone foam sheet. Since the use temperature range of the silicone foam sheet is usually -40℃-100°C, and the silicone foam sheet is a material that is odorless, non-toxic and has good abrasion resistance. In view of the above-mentioned advantages of the silicone foam sheet, the cushioning member can be selected from the silicone foam sheet (such as the gray silicone foam sheet of a certain manufacturer’s T model) to meet the increasingly stringent requirements of vehicle regulations (for example, temperature resistance- 40°C to 100°C, vibration resistance frequency of 1 Hz-1000 Hz, etc.).

It should be noted that the buffer in this embodiment is not limited to a silicone foam sheet. The buffer can also be made of other existing vibration damping materials, such as foam, silicone strips, pressing columns, telescopic columns, and buffer springs that are used to dampen the liquid crystal display, as long as it can be installed on the back plate 11. It is sufficient to buffer the force received by the back plate 11 between the rear cover 20 and the rear cover 20 and meet the above-mentioned reliability conditions of vehicle regulations.

Specifically, the silicone foam sheet can be adhered to the back plate 11 or the back cover 20. Alternatively, a double-sided bonding method can also be used, that is, one side of the silicone foam sheet is bonded to the back plate 11 and the other side is bonded to the back cover 20. Preferably, the silicone foam sheet can only be adhered to the back plate 11. Compared with the way of adhering the silicone foam sheet to the back cover 20, the cushioning effect on the back plate 11 can be further improved. Compared with the double-sided bonding method, the disassembly and repair process can be simplified.

It should be noted that the specific position and size of the above-mentioned buffer are exemplary, and this embodiment is not limited thereto. Buffers can be added wherever needed according to the actual force of the on-board display device. For example, when the vehicle-mounted display device adopts "horizontal screen and horizontal use", the long side of the vehicle-mounted display device is in the vertical direction, and the short side of the vehicle-mounted display device is in the left-right direction. At this time, the force on the lower edge is greater and more concentrated. Correspondingly, a buffer can be provided on the lower edge. Since the upper edge of the vehicle-mounted display device is large in size and the stress concentration is not very obvious, the buffer can not be set here according to the actual situation. At this time, the narrow sides of the vehicle-mounted display device are located in the left and right directions, and no obvious stress concentration will be generated, so the buffer member may not be provided here.

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

In the actual application process, the role of the light guide plate is usually to guide the light to the direction required by the designer through the light guide dots. The working principle of the light guide plate is: the optical grade acrylic sheet is used to absorb the light emitted from the light source, and the light stays on the surface of the optical grade acrylic sheet. When the light hits each dot, the reflected light will diffuse in all angles, and then destroy the reflection conditions. The front of the light guide plate is emitted. Through various sparse and dense dots of different sizes, the light guide plate can emit light evenly. The size and number of dots can affect the optical performance of the light guide plate. Specifically, if the light guide plate of the same size has small dots and a large number, the optical performance of the light guide plate is better (the emitted light is more uniform); while the large dots and a small number have a slightly poorer optical performance. For vehicle-mounted display devices, due to long-term high-intensity vibration conditions, the dots are likely to rub against the reflector (another element adjacent to the light guide plate in the display assembly 10) under high-frequency vibration, resulting in wear, etc. White spots and the like appear on the display panel of the vehicle-mounted display device. Therefore, for a 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. In other words, if the light guide plate of the same size has small dots and a large number, the optical performance of the light guide plate is better, but the wear resistance is poor. However, if the dots are large and the number is small, the optical performance of the light guide plate is slightly worse, but the abrasion resistance is better. For example, the existing light guide plate mold uses a laser process, and the dot size of the laser process is 65 μm to 75 μm (micrometers), which is invisible to the naked eye, and will easily rub against the reflector under high-frequency vibration, causing wear. A 10mm (millimeter) long scratch can completely destroy more than a dozen dots. The optical performance of the damaged dots is impaired, resulting in obvious visible white spots. In this embodiment, the light guide plate dot mold process is changed to etching, and the etching dot size is 200 μm to 300 μm, and the light guide plate dots of 200 μm to 300 μm can be obtained. The dot size of the light guide plate is about 5 times that before the change, which is clearly visible to the naked eye. When the large dots face the same scratch (such as the above-mentioned 10mm long scratch), the dots will not be completely destroyed. Therefore, the dots of the light guide plate also have no significant influence on the optical performance, which can make the display panel of the vehicle-mounted display device free of white spots. In this way, the problem of white spots on the display panel of the vehicle-mounted display device in the prior art after being shaken is solved.

It should be noted that this embodiment is not limited to the light guide plate dots of 200 μm to 300 μm. For example, the dots of the light guide plate can also be less than 200 μm, or greater than 300 μm, as long as the abrasion resistance of the dots of the light guide plate can be improved without significant influence on the optical performance. In addition, this embodiment is not limited to only using an etching process to make the light guide plate dot mold, and deposition or printing processes can also be used, as long as the light guide plate dots of the required size can be formed.

As shown in FIG. 1 and FIG. 3, the back cover 20 may also be provided with a plurality of heat dissipation holes 22 to dissipate the PCB board covered by the back cover 20.

In addition, live simulations can be carried out through vibration tests to more accurately reflect the performance and physical changes of the display panel of the vehicle-mounted display device after long-term use. Using the detection results, more targeted buffers are set at the positions where the display panel is prone to yellowing, so as to obtain a more effective vibration reduction effect. For example, the vehicle-mounted display device to be tested can be installed on a vibration test bench, and the actual operating conditions of the vehicle-mounted display device can be simulated through the vibration test to test the vibration frequency of the vehicle-mounted display device and its performance after long-term use. Experiments have found that for a vehicle-mounted display device of a certain size (for example, 17 inches), at a vibration frequency of 1000 Hz, the display panel will appear yellow after long-term use. Then you can set the buffer at the corresponding position according to the test result, and then perform the vibration test on the vehicle-mounted display device with the buffer member. Under the same vibration conditions, the experimental results show that the vehicle-mounted display device with the buffer member does not show a display panel Yellowing phenomenon.

Those skilled in the art can understand that the various operations, methods, and steps, measures, and solutions in the process that have been discussed in the present disclosure can be alternated, changed, combined, or deleted.

In the description of the present disclosure, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying The referred device or element must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

The above are only part of the embodiments of the present disclosure. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present disclosure, several improvements and modifications can be made, and these improvements and modifications should also be considered This is the scope of protection of this disclosure.

Claims

A vehicle-mounted display device includes:

A display assembly, the display assembly includes a backplane and a main printed circuit board, the backplane is rectangular, the main printed circuit board is arranged on the backplane, and the main printed circuit board is elongated , There is a first gap between the lower edge of the main printed circuit board and the lower edge of the backplane;

A back cover, which is connected to the back plate and covers the main printed circuit board;

A first buffer member, the first buffer member is arranged between the back plate and the back cover, and is located in the first gap, for buffering the back plate close to the main printed circuit board The force on the lower area of the.
The vehicle-mounted display device according to claim 1, wherein

The lower edge of the backplane is the short side of the rectangle, the lower edge of the main printed circuit board is the short side of the long strip, and the short side of the main printed circuit board and the back The short sides of the board are parallel.
The vehicle-mounted display device according to claim 2, wherein

The first buffer member is rectangular, the long side of the first buffer member is parallel to the short side of the back plate, and the short side edge of the first buffer member close to the middle of the back plate is separated from the main The long side edge of the printed circuit board close to the middle of the backplane protrudes; and

The distance between the lower edge of the first buffer member and the lower edge of the back plate is 4mm-6mm, and the distance between the outer edge of the first buffer member and the adjacent outer edge of the back plate is 15mm-20mm.
The vehicle-mounted display device according to claim 1, wherein

The display assembly further includes a sub-printed circuit board, the sub-printed circuit board is arranged on the back plate, and is arranged opposite to the main printed circuit board based on the vertical center line of the back plate; The auxiliary printed circuit board is located at the lower part of the backplane, and there is a second gap between the lower edge of the auxiliary printed circuit board and the lower edge of the backplane; and

The vehicle-mounted display device further includes a second buffer member, which is arranged between the back plate and the back cover, and is located in the second gap, for buffering the approach of the back plate The force received by the lower area of the secondary printed circuit board.
The vehicle-mounted display device according to claim 4, wherein

The vehicle-mounted display device includes at least two second buffer members, one of the second buffer members is rectangular, and the long side of the rectangle is parallel to the short side of the back plate and is located close to the auxiliary printed circuit. The position of the outer edge of the board; the other second buffer member has a square shape and is located directly below the auxiliary printed circuit board.
The vehicle-mounted display device according to claim 1, wherein

There is a third gap between the upper edge of the main printed circuit board and the upper edge of the backplane; and

The vehicle-mounted display device further includes two third buffer members, and both of the third buffer members are arranged between the back plate and the back cover, and are located in the third gap, and are based on the The vertical center line of the backplane is symmetrically arranged, and is used to buffer the force received by the upper region of the backplane.
The vehicle-mounted display device according to claim 6, wherein

The third buffer member is rectangular, the long side of the rectangle is parallel to the short side of the back plate, and the distance between the upper edge of the third buffer member and the upper edge of the back plate is 4mm-6mm, so The distance between the outer edge of the third buffer member and the adjacent outer edge of the back plate is 4mm-6mm, and the distance between the two third buffer members is 55mm-65mm.
The vehicle-mounted display device according to claim 1, wherein

The back cover includes a stress dispersion area that is close to the lower edge of the back cover and communicates with the lower edge of the back cover for dispersing between the lower edge of the back cover and the back plate The force of; and

The vehicle-mounted display device further includes a fourth buffer member, the fourth buffer member is disposed between the back plate and the back cover, and is located in the stress dispersion area, and is used to buffer the back plate in the The force experienced by the stress dispersion area.
The vehicle-mounted display device according to any one of claims 1-8, wherein

The buffer member includes a silicone foam sheet.
The vehicle-mounted display device according to claim 9, wherein

The silicone foam sheet is adhered to the back plate and/or the back cover.
The vehicle-mounted display device according to any one of claims 1-8, wherein

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