CN219122534U - Low-cost vehicle-mounted liquid crystal display - Google Patents

Abstract

The utility model discloses a low-cost vehicle-mounted liquid crystal display screen, wherein the strength, corrosion resistance and conductivity of an SUS430 stainless steel sheet are slightly inferior to those of an SUS304 stainless steel sheet, but the price of the SUS430 stainless steel sheet is far lower than that of the SUS304 stainless steel sheet.

Description

Low-cost vehicle-mounted liquid crystal display

Technical Field

The utility model relates to the technical field of liquid crystal display, in particular to a low-cost vehicle-mounted liquid crystal display.

Background

The FPC, which is also known as Flexible Printed Circuit, has a very wide range of applications in manufacturing, particularly in cell phones, notebook computers, tablet computers, digital cameras, and vehicle-mounted liquid crystal displays. The main function of FPC is connection.

In a vehicle-mounted liquid crystal display, a plurality of electronic components are generally arranged on the upper surface of an FPC, the electronic components form an electronic component area, and at the moment, the reinforcing plate is generally required to be additionally used for reinforcing on one side, away from the electronic component area, of the FPC, namely the lower surface of the FPC, so that the FPC is prevented from being greatly deformed in the SMT process of the electronic components, and meanwhile, the flatness of the electronic component area is ensured. Common materials for the reinforcing plate are general FR4 and SUS304 stainless steel sheets.

In the vehicle-mounted liquid crystal display industry, the most commonly used material for the reinforcing plate of the FPC is SUS304 stainless steel sheet. SUS304 stainless steel sheet has the advantage of high strength, strong corrosion resistance and strong electric conductivity compared with another reinforcing material FR 4. However, the SUS304 stainless steel sheet is expensive, and if the SUS304 stainless steel sheet is used as the reinforcing plate, the production cost of the vehicle-mounted liquid crystal display is high, so that the competitiveness of the vehicle-mounted liquid crystal display is reduced.

Disclosure of Invention

The utility model aims to solve the technical problem of reducing the production cost of the vehicle-mounted liquid crystal display while ensuring the performance of the reinforcing plate.

The technical problems to be solved by the utility model are realized by the following technical scheme:

in order to solve the technical problems, the utility model provides a low-cost vehicle-mounted liquid crystal display screen, which comprises a backlight module and a display module arranged above the backlight module, wherein an FPC is bound on the display module, a part of the FPC extends outwards and is fixed on the back of the backlight module after being bent, one side of the FPC is provided with an electronic component area, one side of the FPC far away from the electronic component area is fixedly provided with a reinforcing plate, the reinforcing plate is abutted against the back of the backlight module, the reinforcing plate is made of SUS430 stainless steel sheet, one side of the FPC provided with the electronic component area is provided with protective paper, the protective paper completely covers the electronic component area and partially exceeds the outer edge of the FPC, and the part of the protective paper exceeding the outer edge of the FPC is fixedly adhered to the back of the backlight module.

As a preferred implementation mode of the low-cost vehicle-mounted liquid crystal display, the thickness of the reinforcing plate is 0.2mm, the shape and the position of the reinforcing plate correspond to those of the electronic component area, and each edge area of the reinforcing plate exceeds the corresponding edge area of the electronic component area by at least 0.5mm.

As a preferred implementation mode of the low-cost vehicle-mounted liquid crystal display, after the outwards extending part of the FPC is bent towards the back surface of the backlight module, the reinforcing plate is electrically connected with the backlight iron frame ground of the backlight module.

As a preferred embodiment of the low-cost vehicle-mounted liquid crystal display screen provided by the utility model, the FPC comprises a substrate layer, a circuit layer arranged on the upper surface of the substrate layer and a metal heat dissipation layer arranged on the lower surface of the substrate layer.

As a preferred implementation mode of the low-cost vehicle-mounted liquid crystal display screen provided by the utility model, the FPC further comprises at least one perforation penetrating through the base material layer, the circuit layer and the metal heat dissipation layer, and a heat conduction layer in contact with the circuit layer and the metal heat dissipation layer is arranged on the inner wall of the perforation.

As a preferred implementation mode of the low-cost vehicle-mounted liquid crystal display screen, a heat conductor connected with an external heat conducting structure is arranged in the through hole, and the heat conductor is in contact with the heat conducting layer.

As an preferable implementation mode of the low-cost vehicle-mounted liquid crystal display, the structure of the metal heat dissipation layer is a net structure, a strip structure, a wavy structure or a honeycomb structure.

As a preferred implementation mode of the low-cost vehicle-mounted liquid crystal display, the display module comprises a lower polarizer, an array substrate, a color film substrate, an upper polarizer and a cover plate which are sequentially overlapped from bottom to top, wherein the array substrate is longer than the color film substrate and extends outwards to form a step, the FPC is bound to the upper surface of the array substrate at the step, a bulge is arranged at the edge of the upper surface of the array substrate at the step, and buffer glue is arranged between the bulge and the color film substrate on the upper surface of the array substrate and is abutted to the cover plate.

As a preferred implementation mode of the low-cost vehicle-mounted liquid crystal display screen provided by the utility model, the upper surface of the bulge is flush with the upper surface of the color film substrate.

As an optimal implementation mode of the low-cost vehicle-mounted liquid crystal display screen, a rounding angle is arranged between the bulge and the array substrate.

The utility model has the following beneficial effects:

the strength, corrosion resistance and conductivity of the SUS430 stainless steel sheet are slightly inferior to those of the SUS304 stainless steel sheet, but the price of the SUS430 stainless steel sheet is far lower than that of the SUS304 stainless steel sheet, and the reinforcing plate is made of the SUS430 stainless steel sheet.

Drawings

For a clearer description of the solution in the present application, a brief description will be given below of the drawings that are needed in the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a low-cost vehicle-mounted liquid crystal display provided by the utility model.

Fig. 2 is a front view of the FPC in fig. 1.

Fig. 3 is a rear view of the FPC in fig. 2.

Fig. 4 is a schematic structural diagram of the FPC in fig. 1 after being bent to the back surface of the backlight module.

Fig. 5 is an exploded view of fig. 4.

Fig. 6 is a schematic structural diagram of embodiment 2.

Fig. 7 is a schematic structural diagram of embodiment 3.

Reference numerals illustrate:

a backlight module 100; a display module 200; an FPC1; an electronic component region 2; a reinforcing plate 3; a protective paper 4;

a base material layer 11; a circuit layer 12; a metal heat dissipation layer 13; a perforation 14;

a lower polarizer 5; an array substrate 6; a color film substrate 7; a top polarizer 8; a cover plate 9;

a protrusion 61; and a buffer glue 62.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The utility model provides a low-cost vehicle-mounted liquid crystal display screen which comprises a backlight module and a display module arranged above the backlight module, wherein an FPC (flexible printed circuit) is bound on the display module, a part of the FPC extends outwards and is bent and then is fixed on the back of the backlight module, an electronic component area is arranged on one side of the FPC, a reinforcing plate is fixed on one side of the FPC far away from the electronic component area and is abutted against the back of the backlight module, the reinforcing plate is made of SUS430 stainless steel sheet, protective paper is arranged on one side of the FPC provided with the electronic component area, the protective paper completely covers the electronic component area and partially exceeds the outer edge of the FPC, and the part of the protective paper exceeding the outer edge of the FPC is stuck and fixed with the back of the backlight module.

The strength, corrosion resistance and conductivity of the SUS430 stainless steel sheet are slightly inferior to those of the SUS304 stainless steel sheet, but the price of the SUS430 stainless steel sheet is far lower than that of the SUS304 stainless steel sheet, and the reinforcing plate is made of the SUS430 stainless steel sheet.

In order to better understand the technical solutions of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings. The present utility model is described in detail below with reference to the drawings and the embodiments, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Example 1

Referring to fig. 1 to 5, the low-cost vehicle-mounted lcd provided by the utility model includes a backlight module 100 and a display module 200, the display module 200 is disposed above the backlight module 100, an FPC1 is bound on the display module 200, a portion of the FPC1 is bound with the display module 200, another portion of the FPC1 extends outwards, the outwards extending portion is bent and then fixed on the back surface of the backlight module 100, an electronic component area 2 is disposed on one side of the FPC1, a plurality of electronic components are disposed on the electronic component area 2, a reinforcing plate 3 is fixed on one side of the FPC1 far from the electronic component area 2, the reinforcing plate 3 abuts against the back surface of the backlight module 100, the reinforcing plate 3 is made of SUS430 stainless steel sheet, a protecting paper 4 is disposed on one side of the FPC1 where the electronic component area 2 is disposed, the protecting paper 4 completely covers the electronic component area 2 and partially exceeds the outer edge of the FPC1, and the protecting paper 4 is adhered and fixed on the back surface of the backlight module 100 beyond the outer edge of the FPC 1.

Further, the thickness of the reinforcing plate 3 is 0.2mm, the shape and the position of the reinforcing plate 3 correspond to those of the electronic component area 2, each edge area of the reinforcing plate 3 exceeds the corresponding edge area of the electronic component area 2 by at least 0.5mm, namely, the position and the shape of the reinforcing plate 3 are converged with those of the electronic component area 2, but each unilateral area of the reinforcing plate 3 is larger than that of the electronic component area 2 by more than 0.5mm, so that the reinforcing plate 3 can well protect the electronic component area 2 and avoid damage of the electronic component area 2.

Further, after the portion of the FPC1 extending outwards is bent towards the back of the backlight module 100, the reinforcing plate 3 is electrically connected with the grounding of the backlight iron frame of the backlight module 100, so that static electricity of the reinforcing plate 3 is led out through the grounding of the backlight iron frame, and electrostatic interference is reduced.

Example 2

Referring to fig. 6, as a further optimization scheme of embodiment 1, in this embodiment, the FPC1 includes a substrate layer 11, a circuit layer 12 disposed on an upper surface of the substrate layer 11, and a metal heat dissipation layer 13 disposed on a lower surface of the substrate layer 11, where the manner of disposing may be that the circuit layer 12 and the metal heat dissipation layer 13 are respectively adhered to the substrate layer 11 through double-sided tape. Because the thickness of the substrate layer 11 is thinner, heat on the FPC1 can be diffused to the metal heat dissipation layer 13 through the substrate layer 11, and the metal heat dissipation layer 13 can effectively increase the heat dissipation area of the FPC1 and play a role in uniform heat dissipation, so that the heat dissipation efficiency of the FPC1 is improved. The substrate layer 11 may be any one of polyimide, polyester, polysulfone or polytetrafluoroethylene, the double sided adhesive tape may be any one of an acrylic adhesive layer or an epoxy adhesive layer, and the metal heat dissipation layer 13 may be a copper foil layer.

Further, the FPC1 further includes at least one through hole 14 penetrating through the substrate layer 11, the circuit layer 12 and the metal heat dissipation layer 13, and a heat conducting layer contacting with the circuit layer 12 and the metal heat dissipation layer 13 is disposed on an inner wall of the through hole 14, and can be electrically connected with the circuit layer 12 and the metal heat dissipation layer 13 at two sides of the substrate layer 11 by using good heat conducting performance at the through hole 14, so as to perform good heat conducting function, and the heat conducting layer can provide heat conducting function, so as to achieve good heat dissipation effect. The heat conducting layer can be a copper adhesive conductive ink layer.

Further, a heat conductor connected to the external heat conducting structure is disposed in the through hole 14, and the heat conductor is connected to the external heat conducting structure from one side of the circuit layer 12 and is also in contact with the heat conducting layer in the through hole 14, so that the circuit layer 12 and the metal heat dissipation layer 13 can be connected to the external heat conducting structure through the through hole 14, and heat in the FPC1 is diffused to the external heat conducting structure through the heat conductor in the through hole 14, so as to further improve the heat dissipation efficiency of the FPC 1. Preferably, in order to allow the perforation 14 to be connected with an external heat conductive structure, the perforation 14 is provided at an edge position of the FPC 1.

Further, the metal heat dissipation layer 13 has a uniform heat dissipation structure, and the structure can be any one of a mesh structure, a strip structure, a wave structure or a honeycomb structure, and the heat dissipation effect can be better improved through the uniform heat dissipation structure.

Example 3

Referring to fig. 7, as a further optimization scheme of embodiment 1, in this embodiment, the display module 200 includes a lower polarizer 5, an array substrate 6, a color film substrate 7, an upper polarizer 8 and a cover plate 9 sequentially stacked from bottom to top, the array substrate 6 is longer than the color film substrate 7 and extends outwards to form a step, the FPC1 is bound to the upper surface of the array substrate 6 at the step, a protrusion 61 is disposed at an edge of the upper surface of the array substrate 6 at the step, a buffer glue 62 is disposed between the protrusion 61 and the color film substrate 7 on the upper surface of the array substrate 6, and the buffer glue 62 is abutted to the cover plate 9. Since the edge of the array substrate 6 is provided with the protrusion 61, the protrusion 61 can limit the flow of the buffer glue 62, so that the shape of the buffer glue 62 is easy to control, and the phenomenon of glue overflow or glue dropping is not full can be avoided. Thereby avoiding that the liquid crystal display module 200 cannot be assembled with the chassis. And further, the problems of poor buffering effect and easy breakage of the array substrate 6 caused by insufficient dispensing are avoided, and abnormal display of the liquid crystal display module 200 is prevented.

Further, the upper surface of the protrusion 61 is flush with the upper surface of the color film substrate 7 to further limit the flow of the buffer glue 62, so that the shape of the buffer glue 62 is easy to control, and no glue overflow or glue dropping is not full.

Further, a rounded corner is arranged between the protrusion 61 and the array substrate 6, so that the buffer glue 62 is easier to fill up the space between the protrusion 61 on the upper surface of the array substrate 6 and the color film substrate 7, and the protrusion 61 with the rounded corner can enable the buffer glue 62 to flow into the space between the protrusion 61 on the upper surface of the array substrate 6 and the color film substrate 7 more smoothly, so that bubbles are not easy to occur.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the embodiments described above are only some embodiments of the present application, but not all embodiments, the preferred embodiments of the present application are given in the drawings, but not limiting the patent scope of the present application. This application may be embodied in many different forms, but rather, embodiments are provided in order to provide a more thorough understanding of the present disclosure. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing, or equivalents may be substituted for elements thereof. All equivalent structures made by the specification and the drawings of the application are directly or indirectly applied to other related technical fields, and are also within the protection scope of the application.

Claims (10)

1. The utility model provides a low-cost on-vehicle liquid crystal display, its characterized in that includes backlight unit (100) and sets up display module assembly (200) in backlight unit (100) top, bind on display module assembly (200) have FPC (1), FPC (1) part outwards stretches out and buckle the back of back fixed backlight unit (100), one side of FPC (1) is provided with electronic components district (2), keeps away from electronic components district (2) one side of FPC (1) is fixed with stiffening plate (3), stiffening plate (3) with backlight unit's (100) back butt, stiffening plate (3) material is SUS430 stainless steel sheet, is provided with one side of FPC (1) of electronic components district (2) is provided with protective paper (4), protective paper (4) completely covers electronic components district (2) and part surpass the outer fringe of FPC (1), protective paper (4) surpass the outer fringe portion of FPC (1) with backlight unit's back fixed die set.

2. The low-cost vehicle-mounted liquid crystal display screen according to claim 1, wherein the thickness of the reinforcing plate (3) is 0.2mm, the shape and the position of the reinforcing plate (3) correspond to those of the electronic component area (2), and each edge area of the reinforcing plate (3) exceeds the corresponding edge area of the electronic component area (2) by at least 0.5mm.

3. The low-cost vehicle-mounted liquid crystal display screen according to claim 1, wherein the reinforcing plate (3) is electrically connected with a backlight iron frame ground of the backlight module (100) after the outwards extending part of the FPC (1) is bent towards the back surface of the backlight module (100).

4. The low-cost vehicle-mounted liquid crystal display screen according to claim 1, wherein the FPC (1) includes a base material layer (11), a circuit layer (12) provided on an upper surface of the base material layer (11), and a metal heat dissipation layer (13) provided on a lower surface of the base material layer (11).

5. The low-cost vehicle-mounted liquid crystal display screen according to claim 4, wherein the FPC (1) further comprises at least one through hole (14) penetrating the base material layer (11), the circuit layer (12) and the metal heat dissipation layer (13), and the inner wall of the through hole (14) is provided with a heat conduction layer in contact with the circuit layer (12) and the metal heat dissipation layer (13).

6. The low cost vehicular lcd screen of claim 5, wherein a heat conductor connected to an external heat conducting structure is disposed within the aperture (14), the heat conductor being in contact with the heat conducting layer.

7. The low-cost vehicle-mounted liquid crystal display screen according to claim 4, wherein the metal heat dissipation layer (13) has a mesh structure, a strip structure, a wave structure or a honeycomb structure.

8. The low-cost vehicle-mounted liquid crystal display screen according to claim 1, wherein the display module (200) comprises a lower polarizer (5), an array substrate (6), a color film substrate (7), an upper polarizer (8) and a cover plate (9) which are sequentially overlapped from bottom to top, the array substrate (6) is longer than the color film substrate (7) and extends outwards to form a step, the FPC (1) is bound on the upper surface of the array substrate (6) at the step, a protrusion (61) is arranged at the edge of the upper surface of the array substrate (6) at the step, a buffer glue (62) is arranged between the protrusion (61) and the color film substrate (7) on the upper surface of the array substrate (6), and the buffer glue (62) is in butt joint with the cover plate (9).

9. The low-cost vehicle-mounted liquid crystal display screen according to claim 8, wherein the upper surface of the protrusion (61) is flush with the upper surface of the color film substrate (7).

10. The low-cost vehicle-mounted liquid crystal display screen according to claim 9, wherein a rounded corner is arranged between the protrusion (61) and the array substrate (6).

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