Military display module with wide temperature range and high reliability

Abstract

The utility model discloses a wide-temperature high-reliability military display module. The wide-temperature high-reliability military display module comprises a bearing part, a conductive frame, an elastic conductive layer, a display screen and a transparent conductive layer with a heating function, the bearing part is generally a circuit board, and the conductive frame is at least provided with a display window. The elastic conductive layer is arranged on the conductive frame around the display window; the transparent conducting layer with a heating function is attached to the elastic conducting layer and at least covers the whole display window; the display screen is attached to the transparent conductive layer and is aligned with the display window; the conductive frame is detachably connected and reversely buckled on the bearing piece, so that the transparent conductive layer and the display screen are wrapped in the space between the conductive frame and the bearing piece, and the display module is formed. The conductive foam provided by the utility model not only can deform and be tightly attached to improve the electromagnetic shielding performance, but also can provide the damping performance. The display screen is wrapped by the plastic frame and then installed in the metal frame through the positioning structure, so that the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a military display module with wide temperature range and high reliability. Background Art

[0002] As an interactive interface of electronic devices, LCD screens are basically indispensable components. Electronic devices, especially display modules, have relatively poor resistance to drop and shock, and are difficult to adapt to harsh operating environments, especially military environments, where vibrations and impacts are more frequent. The existing military display modules will affect the normal use of the LCD screen due to structural settings when subjected to vibrations and impacts, and are also prone to damage glass devices during assembly. In addition, electromagnetic interference is becoming more and more serious in the modern environment. The impact on ordinary mobile phone LCD screens is not too bad, but for precision display occasions, especially military anti-interference LCD screens are very rare. There is a lack of mature products on the market. The few existing products are expensive and have weak anti-interference capabilities, and cannot meet the military anti-interference electromagnetic shielding requirements.

[0003] The applicant's prior application CN109765711A disclosed a military display module, including a PCB circuit board, a liquid crystal screen, a heating glass, a backlight assembly and an outer frame, wherein the liquid crystal screen, the heating glass and the backlight assembly are fixed together in sequence by gluing, and are mounted on the PCB circuit board through a buffer layer, wherein the outer frame is a groove-shaped frame capable of accommodating the liquid crystal screen, and the outer frame is mounted on the PCB circuit board through snap fastening, and a display window is provided in the middle of the outer frame for exposing the display area of ​​the liquid crystal screen, and pins for installation and connection are provided on the back of the PCB circuit board, and bolt fixing holes are provided on the PCB circuit board at one end of the pins, and an elastic plate is provided on the outer frame at the end opposite to the pins, and bolt fixing holes are provided on the elastic plate, and the entire military display module can be fixed on the base through two sets of bolt fixing holes. The utility model has excellent anti-vibration performance through the foam and the elastic plate on the outer frame, and less damage to the glass device during the installation process. This technology is one of the first-generation series of products of our company. Some problems were gradually found in the production and use of this series of products. For example, as the use time increases or the metal frame is not flat enough, there will be a gap between the conductive film and the metal frame, which may cause magnetic leakage. In some extreme cases, it cannot meet the requirements of high-performance electromagnetic shielding. In addition, during the assembly process, the display screen is a glass device, and a gap must be reserved between the side walls of the display screen and the metal frame, and the gap cannot be too small, otherwise it will cause assembly difficulties. If the gap is too large, it is very easy to cause the relative position of the display screen and the metal frame to be more random during manual assembly, that is, the assembled product has poor consistency, especially before tightening the twisting foot of the metal frame, the display screen and the metal frame are active due to the gap, and the twisting and tightening requires the entire module to be turned over, so this process is very likely to cause the display screen and the metal frame to move relative to each other. This erroneous movement exacerbates the inconsistency of the product, and there is a certain probability that the conductive film will be misaligned or wrinkled, so that the electromagnetic shielding performance cannot meet expectations; therefore, some new technologies are used to solve these problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a military display module with wide temperature and high reliability, aiming to improve the electromagnetic shielding reliability of the military display module in the prior art, thereby improving the overall reliability. Another purpose of the utility model is to solve the problem of low positioning accuracy of the display screen and the metal frame during the assembly process of the military display module in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A military display module with wide temperature and high reliability, comprising:

[0007] bearing member;

[0008] The conductive frame is provided with at least one display window;

[0009] An elastic conductive layer is arranged on the conductive frame around the display window;

[0010] A transparent conductive layer with a heating function is attached to the elastic conductive layer and covers at least the entire display window; and

[0011] A display screen is attached to the transparent conductive layer and aligned with the display window;

[0012] The conductive frame is detachably connected and inverted on the carrier, so that the transparent conductive layer and the display screen are wrapped in the space between the conductive frame and the carrier to form a display module.

[0013] Furthermore, the conductive frame includes a bottom frame and side frames located around the bottom frame, the display window is arranged on the bottom frame, at least one side frame is provided with a plurality of positioning holes, the display screen is provided with a protective frame wrapping around it, and the protective frame is provided with positioning blocks corresponding to the positioning holes.

[0014] Furthermore, the positioning block is a wedge-shaped block protruding laterally, and the thickness of the wedge-shaped block increases in a direction away from the bottom frame, and a clamping surface in contact with the edge of the positioning hole is formed at the end with the maximum thickness.

[0015] Furthermore, each side frame is provided with at least one positioning hole, and the number and positions of the positioning blocks are arranged corresponding to the positioning holes.

[0016] Furthermore, the protection frame is a plastic basket, and the positioning block is integrally formed with the protection frame.

[0017] Furthermore, the conductive frame is a metal frame, the side frames are metal thin plates, and gaps are arranged between adjacent side frames, so that the side frames have the elasticity to be able to slightly deform outwards.

[0018] Furthermore, the elastic conductive layer is conductive foam, and the conductive foam is attached to the bottom frame around the display window by adhesive.

[0019] Furthermore, the transparent conductive layer is a transparent glass with conductive layers on both sides, one of the conductive layers is used for heating, and the other conductive layer is used as a window shielding layer.

[0020] Furthermore, the carrier is a circuit board, a fixing hole is provided on the circuit board, and a twist pin for connecting with the fixing hole is provided on the side frame.

[0021] Furthermore, a buffering and shock-absorbing layer is arranged between the display screen and the circuit board.

[0022] The beneficial effects of the utility model are:

[0023] In the utility model, conductive foam is added as an elastic conductive layer to improve the electrical contact performance between the transparent conductive layer and the metal frame, thereby ensuring the reliability of electromagnetic shielding. The utility model adds a protective frame and a positioning structure, so that the display screen can be positioned with the metal frame with high precision during the assembly process, preventing the two from relative displacement during the assembly process, thereby causing poor product consistency and affecting the electromagnetic shielding performance. The utility model not only has excellent low-temperature working performance, but also has excellent electromagnetic shielding performance, and also has anti-vibration and anti-impact effects. The anti-vibration performance is reflected. The display screen of the utility model is wrapped by a plastic frame, and then positioned by positioning blocks and positioning holes. The installation is accurate, the yield rate is high, and the protection performance of the display screen is good; the twist foot is installed on the circuit board, and the extrusion force generated during the twisting process of the twist foot is used to deform the conductive foam, which has a pre-tightening force and good anti-vibration performance. The conductive foam can not only deform and fit tightly to improve the electromagnetic shielding performance, but also provide shock absorption performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic diagram of the overall structure of the military display module with wide temperature range and high reliability of the utility model.

[0025] Figure 2 This is a schematic diagram of the decomposition of a military display module with wide temperature range and high reliability of the utility model.

[0026] Figure 3 It is a side view of the military display module with wide temperature range and high reliability of the utility model.

[0027] Figure 4 for Figure 3 Middle AA section view.

[0028] Figure 5 for Figure 4 A is a partial enlarged schematic diagram.

[0029] Figure 6 It is a schematic diagram of the conductive frame of the utility model.

[0030] 100-bearing member, 110-fixing hole;

[0031] 200 - conductive frame, 210 - bottom frame, 211 - display window, 220 - side frame, 221 - positioning hole, 222 - first wiring hole, 223 - second wiring hole, 224 - twist foot, 225 - gap;

[0032] 300- elastic conductive layer;

[0033] 400-transparent conductive layer, 410-first row of wires;

[0034] 500-display screen, 510-protection frame, 511-positioning block, 512-engaging surface, 520-second row of cables;

[0035] 600- shock absorbing layer. DETAILED DESCRIPTION

[0036] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] like Figure 1 and Figure 2 As shown, the utility model provides a military display module with wide temperature and high reliability, comprising:

[0040] Carrier 100;

[0041] The conductive frame 200 is provided with at least one display window 211;

[0042] The elastic conductive layer 300 is disposed on the conductive frame 200 around the display window 211;

[0043] A transparent conductive layer 400 with a heating function is attached to the elastic conductive layer 300 and covers at least the entire display window 211; and

[0044] The display screen 500 is attached to the transparent conductive layer 400 and is aligned with the display window 211;

[0045] The conductive frame 200 is detachably connected and inverted on the carrier 100 , so that the transparent conductive layer 400 and the display screen 500 are wrapped in the space between the conductive frame 200 and the carrier 100 to form a display module.

[0046] The utility model arranges an elastic conductive layer 300 between the conductive frame 200 and the transparent conductive layer 400, and utilizes the deformable characteristics of the elastic conductive layer 300 to ensure close contact between the transparent conductive layer 400 and the conductive frame 200, thereby improving the reliability of electromagnetic shielding, and avoiding the problem of loose connection between the transparent conductive layer 400 and the conductive frame 200 due to deformation of the conductive frame 200 and loose assembly, thereby causing a decrease in electromagnetic shielding performance; in addition, the utility model avoids direct contact between the transparent conductive layer 400 and the metal frame by arranging a deformable elastic conductive layer 300, thereby improving the anti-seismic performance.

[0047] The conductive frame 200 has any shape as long as it meets the above-mentioned assembly requirements. For example, Figure 2 and Figure 6 As shown, the conductive frame 200 includes a bottom frame 210 and side frames 220 located around the bottom frame 210, the display window 211 is arranged on the bottom frame 210, at least one side frame 220 is provided with a plurality of positioning holes 221, and the display screen 500 is provided with a protective frame 510 that wraps around it, and the protective frame 510 is provided with positioning blocks 511 corresponding to the positioning holes 221. The display screen 500 is wrapped around by the protective frame 510, so that the display screen 500 is prevented from directly contacting the conductive frame 200 around it, and the display screen 500 is effectively prevented from being damaged during the assembly process; in addition, the utility model provides the cooperation of the positioning blocks 511 and the positioning holes 221, so that during assembly, the display screen 500 and the conductive frame 200 can be accurately positioned, and the relative displacement of the display screen 500 and the conductive frame 200 is effectively prevented during the assembly process.

[0048] like Figure 2 and Figure 5 As shown, as a preferred embodiment, the positioning block 511 is a wedge-shaped block that protrudes laterally. The thickness of the wedge-shaped block increases in the direction away from the bottom frame 210, and a snap-fit ​​surface 512 that contacts the edge of the positioning hole 221 is formed at the end with the maximum thickness. By setting the wedge-shaped positioning block 511, the positioning block 511 can be easily snapped into the positioning hole 221 according to the wedge-shaped guide without the need for additional tools.

[0049] In some preferred embodiments, each side frame 220 is provided with at least one positioning hole 221, and the number and position of the positioning blocks 511 are arranged corresponding to the positioning holes 221, so that the display screen 500 can be completely positioned on all sides, for example Figure 6 In the embodiment, two positioning holes 221 are provided on each side frame 220 .

[0050] In some embodiments, Figure 2 and Figure 5 As shown, the protection frame 510 is a plastic basket, and the positioning block 511 is integrally formed with the protection frame 510. The plastic frame is low in cost, can provide good protection, and is easy to form. The plastic frame itself can be fixed around the display screen 500 by gluing. Of course, as a basic common sense, the plastic frame must also be provided with an outlet for the display screen 500 cable.

[0051] In some embodiments, participating Figure 6 As shown, the conductive frame 200 is a metal frame, the side frame 220 is a metal sheet, and a gap 225 is arranged between adjacent side frames 220, so that the side frame 220 has the elasticity to be slightly deformed outward, so that during the assembly of the display screen 500, when the wedge block squeezes the side frame 220, the side frame 220 can be slightly deformed outward, and when the wedge block reaches the positioning hole 221, the side frame 220 rebounds quickly, which not only meets the assembly requirements, but also minimizes the gap between the plastic frame and the side frame 220 of the conductive frame 200, thereby improving the relative position assembly accuracy between the display screen 500 and the conductive frame 200, and at the same time making the display screen 500 firmly assembled and improving the vibration resistance.

[0052] In some embodiments, Figure 2 As shown, the elastic conductive layer 300 is conductive foam, which is attached to the bottom frame 210 around the display window 211 by gluing. The gluing methods include but are not limited to solid glue, liquid glue, double-sided glue or conductive glue with self-adhesive backing. Using conductive foam as the elastic conductive layer 300 not only meets the requirements but also has low cost.

[0053] In some embodiments, the transparent conductive layer 400 is assembled together using a full lamination process.

[0054] In some embodiments, the transparent conductive layer 400 is a transparent glass with conductive layers on both sides, one of the conductive layers is used for heating and the other conductive layer is used as a window shielding layer, or both conductive layers can be used for heating; in some preferred embodiments, the conductive layer is an IOT (indium tin oxide) coating.

[0055] In some embodiments, the carrier 100 is a circuit board, specifically a PCB circuit board, and the circuit board is provided with a long strip of fixing holes 110, and the side frame 220 is provided with a twist foot 224 for connecting with the fixing hole 110. The setting scheme of the twist foot 224 and the fixing hole 110 refers to the connection method of the L-shaped metal sheet and the PCB circuit board in the applicant's prior application CN109765711A, and the utility model will not repeat it.

[0056] In some embodiments, Figure 2 As shown, a buffering and shock absorbing layer 600 is arranged between the display screen 500 and the circuit board. The buffering and shock absorbing layer 600 can be a buffering foam to improve the shock resistance. The buffering foam can be a whole piece attached to the back of the display screen 500, or it can be a plurality of small modules, as long as the back of the display screen 500 is in flexible contact with the circuit board and is firmly fixed.

[0057] In some embodiments, Figure 2 and Figure 6 As shown, the side frame 220 of the conductive frame 200 is provided with a plurality of wiring holes for leading out the heating wiring of the display screen 500 and the transparent conductive layer 400; Figure 6 Taking the middle rectangular frame as an example, the two short side frames 220 of the rectangular frame are respectively provided with a first wiring hole 222 for leading out the first wiring 410 of the transparent conductive layer 400, and the long side frame 220 of the rectangular frame is provided with a second wiring hole 223 for leading out the second wiring 520 of the display screen 500.

[0058] The utility model also provides an assembly method of a display module in an optimal embodiment, which is as follows: conductive foam is attached around the display window 211 of the bottom frame 210 by conductive glue; the transparent conductive layer 400 and the display screen 500 with the protective frame 510 are assembled together by a full-fitting process, and then installed in the conductive frame 200 after assembly, and the positioning blocks 511 around the protective frame 510 enter the positioning holes 221 of the side frame 220 to be snap-fitted and fixed, thereby completing the fixation of the display screen 500 and the conductive frame to form a display component, and then the display component is turned upside down on the circuit board, and the twist pin 224 passes through the long hole on the circuit board to the back, and the twist pin 224 is twisted so that the end of the twist pin 224 is perpendicular to the long hole, thereby completing the assembly of the wide temperature and high reliability display module.

[0059] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, a person skilled in the art should understand that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not deviate from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A military display module with wide temperature and high reliability, characterized in that: include: bearing member; The conductive frame is provided with at least one display window; An elastic conductive layer is arranged on the conductive frame around the display window; A transparent conductive layer with a heating function is attached to the elastic conductive layer and covers at least the entire display window; as well as A display screen is attached to the transparent conductive layer and aligned with the display window; The conductive frame is detachably connected and inverted on the carrier, so that the transparent conductive layer and the display screen are wrapped in the space between the conductive frame and the carrier to form a display module.

2. The military display module with wide temperature and high reliability according to claim 1, characterized in that: The conductive frame includes a bottom frame and side frames located around the bottom frame, the display window is arranged on the bottom frame, at least one side frame is provided with a plurality of positioning holes, the display screen is provided with a protective frame wrapping around it, and the protective frame is provided with positioning blocks corresponding to the positioning holes.

3. The military display module with wide temperature and high reliability according to claim 2, characterized in that: The positioning block is a wedge-shaped block protruding laterally. The thickness of the wedge-shaped block increases in a direction away from the bottom frame, and a clamping surface in contact with the edge of the positioning hole is formed at the end with the maximum thickness.

4. The military display module with wide temperature and high reliability according to claim 3, characterized in that: At least one positioning hole is provided on each side frame, and the number and positions of the positioning blocks are arranged corresponding to the positioning holes.

5. The military display module with wide temperature and high reliability according to claim 2, characterized in that: The protection frame is a plastic basket, and the positioning block is integrally formed with the protection frame.

6. The military display module with wide temperature and high reliability according to claim 2, characterized in that: The conductive frame is a metal frame, the side frame is a metal thin plate, and gaps are arranged between adjacent side frames, so that the side frames have elasticity that allows them to be slightly deformed outward.

7. The military display module with wide temperature and high reliability according to claim 2, characterized in that: The elastic conductive layer is conductive foam, and the conductive foam is attached to the bottom frame around the display window by adhesive.

8. The military display module with wide temperature and high reliability according to claim 2, characterized in that: The transparent conductive layer is a transparent glass with conductive layers on both sides, one of which is used for heating and the other is used as a window shielding layer.

9. The military display module with wide temperature and high reliability according to claim 2, characterized in that: The bearing member is a circuit board, a fixing hole is arranged on the circuit board, and a twist foot for connecting with the fixing hole is arranged on the side frame.

10. The military display module with wide temperature and high reliability according to claim 9, characterized in that: A buffering and shock-absorbing layer is arranged between the display screen and the circuit board.

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