High-transparency and high-reliability military display module

Abstract

The utility model discloses a military display module with high transparency and high reliability. The military display module comprises a bearing piece, a conductive frame, an elastic conductive layer, a transparent conductive layer with a heating function and a display module composed of a backlight assembly, a prism film and a display screen with a protection frame arranged on the periphery. The elastic conductive layer is arranged on the conductive frame around the display window, so that no matter whether the metal frame is flat or not, the tight fitting and electric contact performance of the transparent conductive layer and the metal frame can be ensured, and the electromagnetic shielding reliability is ensured; the positioning structures are arranged on the metal framework and the protection frame, so that the assembly precision and the assembly efficiency can be improved; by arranging the prism film, light in the backlight source is continuously recycled under the action of the prism structure, so that the effect of axial brightness enhancement is achieved, and the screen brightness and the light source utilization rate are improved; and through the connection of the protection frame and the buckle, the shock resistance and impact resistance of the display module are improved.

Description

Technical Field

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

[0002] As an interactive interface of electronic devices, the display screen is an essential component. Electronic devices, especially display modules, have poor drop and shock resistance and are difficult to adapt to harsh environments, especially military environments, where vibrations and impacts are more frequent. However, due to structural problems, existing military display modules will affect the normal use of the display screen when subjected to vibrations and impacts, and are also prone to damage glass components during assembly. In addition, since there is a backlight component in the display screen, light source leakage is inevitable. In addition, the installation of heated glass on the display screen will cause more serious damage to the light source. Therefore, how to improve the light source utilization rate of the backlight component, reduce energy consumption, and increase brightness is also an urgent problem to be solved.

[0003] The applicant's prior application CN109739039A discloses a military high-transmittance liquid crystal display module, including a PCB circuit board, a display screen, a prism film, a glue frame, a backlight assembly and an outer frame. The glue frame is fixedly mounted on the PCB circuit board, and the backlight assembly is fixed inside the glue frame. The prism film, heating glass and display screen are sequentially mounted on the backlight assembly. A protrusion is provided on the side of the glue frame, and the display screen is fixed on the protrusion of the glue frame by gluing. The outer frame is mounted on the PCB circuit board by snap-fitting. A display window is provided in the middle of the outer frame for exposing the display area of ​​the display screen. Pins for installation and connection are provided on the back of the PCB circuit board, and a bolt fixing hole is provided on the PCB circuit board at one end of the pin. An elastic plate is provided on the other end of the outer frame, and a bolt fixing hole is provided on the elastic plate. The entire display module can be fixed on the base through two sets of bolt fixing holes. 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 transparent conductive film on the surface of the LCD screen and the conductive contact with 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 around the side walls of the display screen and the metal frame. If the gap is too small, it will cause assembly difficulties. If the gap is too large, the relative position of the display screen and the metal frame will 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. In this process, it is very easy to cause the display screen and the metal frame to move relative to each other. This misalignment aggravates 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. On the basis of solving these problems, the applicant has updated all the series of products and formed a series of patent applications. Utility Model Content

[0004] The main purpose of the utility model is to provide a high-transmittance and high-reliability military display module, aiming to improve the connection tightness and electromagnetic shielding performance between components of the military display module in the prior art during assembly and use, 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 high-transmittance and high-reliability military display module, 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, attached to the elastic conductive layer and covering at least the entire display window; and

[0011] The display module comprises a backlight assembly, a prism film and a display screen which are sequentially installed, wherein the display screen is attached to the transparent conductive layer and aligned with the display window, and the prism film comprises a substrate installed on the surface of the backlight assembly and a plurality of rows of prisms arranged on the substrate;

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

[0013] Furthermore, the cross section of the prism is an isosceles triangle.

[0014] Furthermore, the cross section of the prism is in an arc shape away from the vertex of the base.

[0015] 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.

[0016] 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.

[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 fixing block matched with the twist foot is provided on one side of the fixing hole, and the fixing block is provided with a slight slope.

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

[0023] 1. In the utility model, by adding an elastic conductive layer, whether the conductive frame is flat or not, the close fit and electrical contact performance of the transparent conductive layer and the conductive frame can be ensured, thereby ensuring the reliability of electromagnetic shielding; by setting a prism film, the light in the backlight source is continuously recycled under the action of the prism structure, thereby achieving the effect of axial brightness enhancement, and by setting the cross-section of the prism to an isosceles triangle, the range of the light can be more conveniently controlled, further improving the screen brightness and light source utilization.

[0024] 2. The utility model can effectively prevent the display screen from being damaged during the assembly process by providing a protection frame outside the display screen; by providing positioning structures on the conductive frame and the protection frame, the protection frame can be positioned with the conductive frame with high precision during the assembly process, thereby preventing the relative displacement between the two during the assembly process from affecting the product consistency and electromagnetic shielding performance.

[0025] 3. The utility model uses the conductive foam as an elastic conductive layer to make a non-rigid contact between the display screen and the conductive frame, thereby improving the impact resistance of the display module. The extrusion force generated when the conductive frame is installed on the carrier by twisting the feet will deform the conductive foam and generate a pre-tightening force, thereby improving the seismic performance. The conductive foam can not only deform and fit tightly to improve the electromagnetic shielding performance, but also provide shock absorption performance; at the same time, with the positioning of the positioning blocks and positioning holes, the installation is accurate, the yield rate is high, and the protection performance of the display screen is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the high-transmittance and high-reliability military display module of the utility model;

[0027] Figure 2 This is a schematic diagram of the decomposition of the high-transmittance and high-reliability military display module of the utility model;

[0028] Figure 3 This is a side view of the high-transparency and high-reliability military display module of the utility model;

[0029] Figure 4 for Figure 3 Middle AA section view;

[0030] Figure 5 for Figure 4 A magnified schematic diagram of the middle part;

[0031] Figure 6 This is a schematic diagram of the conductive frame of the utility model;

[0032] Figure 7 This is a schematic diagram of the prism film of the utility model;

[0033] Figure 8 Schematic diagram of a prismatic film having an isosceles triangle cross section;

[0034] Fig. 9 Schematic diagram of a prism film with an arc-shaped top angle.

[0035] Reference numerals:

[0036] 100-bearing member, 110-fixing hole, 120-fixing block;

[0037] 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;

[0038] 300- elastic conductive layer;

[0039] 400-transparent conductive layer, 410-first row of wires;

[0040] 500-display module, 510-backlight assembly, 520-prism film, 521-substrate, 522-prism, 530-display screen, 531-protection frame, 532-positioning block, 533-second row of cables;

[0041] 600- shock absorbing layer. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] like Figure 1 and Figure 2 As shown, the utility model provides a high-transmittance and high-reliability military display module, comprising:

[0046] Carrier 100;

[0047] The conductive frame 200 is provided with at least one display window 211;

[0048] The elastic conductive layer 300 is disposed on the conductive frame 200 around the display window 211;

[0049] A transparent conductive layer 400 is attached to the elastic conductive layer 300 and covers at least the entire display window 211; and

[0050] The display module 500 includes a backlight assembly 510, a prism film 520 and a display screen 530 which are installed in sequence. The display screen 530 is attached to the transparent conductive layer 400 and aligned with the display window 211. The prism film 520 includes a substrate 521 installed on the surface of the backlight assembly 510 and a plurality of prisms 522 arranged on the substrate 521.

[0051] The conductive frame 200 is detachably connected and inverted on the carrier 100 , so that the transparent conductive layer 400 and the display module 500 are wrapped in the space between the conductive frame 200 and the carrier 100 to form a display module.

[0052] The utility model sets an elastic conductive layer 300 between the conductive frame 200 and the display screen 530, 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. On the one hand, it can improve the sealing of the high-transmittance and high-reliability military display module of the present application to ensure the performance of use. On the other hand, it can improve the reliability of electromagnetic shielding, 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 display screen 530 and the conductive frame 200 by setting a deformable elastic conductive layer 300, thereby improving the anti-seismic performance.

[0053] The utility model has a prism film 520 composed of a base 521 and a plurality of prisms 522 disposed between the display screen 530 and the backlight assembly 510. The light in the backlight source is continuously recycled under the action of the prism structure, thereby achieving an effect of axial brightness enhancement, which can improve the screen brightness and light source utilization rate, so that the display module of the utility model can clearly display information under various extreme lighting conditions such as strong light and weak light, and meet various extreme military environments.

[0054] In some embodiments, Figure 7 and Figure 8 As shown, the prism film 520 includes a base 521 and a row of prisms 522 structures arranged on the base 521. The prism film 520 is made of a PET board as a whole. The base 521 of the prism film 520 is fitted on the surface of the backlight assembly 510. The base 521 is a PET backboard. The prisms 522 are arranged on one side of the PET backboard. The height of each prism 522 relative to the PET backboard is equal. As a preferred embodiment, the cross-section of each prism 522 in the utility model is an isosceles triangle. The base of the isosceles triangle is fitted with the PET backboard. The vertex angle of each isosceles triangle is 85°-95°, which can conveniently control the range of light. When in use, when the light incident from the backlight source passes through the prism structure, only the light within a certain angle range can be emitted through refraction, and the rest of the light is reflected back to the backlight source by the edge of the prism because it does not meet the refraction condition, and then re-emitted by the reflective sheet at the bottom of the backlight source. In this way, the light in the backlight source is continuously recycled under the action of the prism structure, and the light originally diverging in all directions is controlled within a certain angle range after passing through the prism film 520, thereby achieving the effect of axial brightness enhancement. The utility model sets the cross section of the prism 522 to an isosceles triangle, which can more conveniently control the range of light and further improve the screen brightness and light source utilization.

[0055] As a preferred embodiment, Fig. 9 As shown, the apex angle of the isosceles triangle cross section of the prism 522 away from the base 521 is in an arc shape, the arc radius of the arc-shaped apex angle is 1.5-1.7 μm, the surface roughness Ra of the prism 522 is less than or equal to 18 μm, and multiple prisms 522 are arranged at equal intervals. This structure of the prism film 520 can effectively reduce the generation of negative optical effects such as Newton rings and moiré interference, has a good optical performance, and reduces the electrostatic pollution phenomenon generated when the brightness enhancement film and the diffusion film are stacked.

[0056] In some embodiments, Figure 2 and Figure 6As shown, the conductive frame 200 includes a bottom frame 210 and a side frame 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 530 is provided with a protective frame 531 that wraps around it, and the protective frame 531 is provided with positioning blocks 532 corresponding to the positioning holes 221. The display screen 530 is wrapped around by the protective frame 531, so that the display screen 530 is prevented from directly contacting the conductive frame 200 around the display screen 530, and the display screen 530 is effectively prevented from being damaged during the assembly process; in addition, the utility model provides the cooperation of the positioning blocks 532 and the positioning holes 221, so that the display screen 530 and the conductive frame 200 can be accurately positioned during assembly, and the relative displacement of the display screen 530 and the conductive frame 200 is effectively prevented during the assembly process. The present application not only increases the convenience of assembly, but also improves the assembly accuracy, thereby improving the assembly quality and efficiency of the utility model.

[0057] like Figure 2 and Figure 5 As shown, as a preferred embodiment, the positioning block 532 is a wedge-shaped block protruding laterally, and the thickness of the wedge-shaped block increases in the direction away from the bottom frame 210, and a snap-fitting surface in contact with the edge of the positioning hole 221 is formed at the end with the maximum thickness; by setting the wedge-shaped positioning block 532, no additional tools are required, so that the positioning block 532 can be easily snapped into the positioning hole 221 according to the wedge-shaped guide.

[0058] 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 532 are arranged corresponding to the positioning holes 221, so that the display screen 530 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 .

[0059] In some embodiments, Figure 2 and Figure 5 As shown, the protection frame 531 is a plastic basket, and the positioning block 532 is integrally formed with the protection frame 531. The plastic basket is low in cost, can provide good protection, and is easy to form. The plastic basket itself can be fixed around the display screen 530 by gluing. Of course, as a basic common sense, the plastic basket must also be provided with an outlet for the display screen 530 cable.

[0060] In some embodiments, participating Figure 6As 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 in the process of assembling the protection frame 531, 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 225 between the plastic basket and the side frame 220 of the conductive frame 200, thereby improving the relative position assembly accuracy between the display screen 530 and the conductive frame 200, and at the same time making the display screen 530 firmly assembled and improving the seismic performance.

[0061] 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.

[0062] In some embodiments, the transparent conductive layer 400 is assembled together using a full lamination process.

[0063] 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 ITO (indium tin oxide) coating.

[0064] In some embodiments, Figure 2As shown, the carrier 100 is a circuit board, specifically a PCB circuit board, and a long strip-shaped fixing hole 110 is provided on the carrier 100, and a twist foot 224 for connecting with the fixing hole 110 is provided on the side frame 220, and a fixing block 120 matching with the twist foot 224 is provided on one side of the fixing hole 110, and the fixing block 120 is provided with a slight slope. By providing the fixing hole 110, the installation and positioning of the conductive frame 200 and the carrier 100 can be quickly realized by passing the twist foot 224 through the fixing hole 110, thereby further improving the assembly accuracy and assembly efficiency. The utility model realizes a snap connection through the twist foot 224 and the slightly sloped fixed block 120, which is not only convenient for assembly and disassembly and has appropriate tightness, but also will not cause the equipment to be unstable due to too loose installation, nor will the display screen 530 be damaged due to too tight installation; and by providing the slightly sloped fixed block 120, a pre-tightening force can be provided between the connection between the metal frame and the circuit board, and the snap connection of the utility model is not easy to loosen even if subjected to severe vibration and impact; when twisting the twist foot 224, only a very small twisting angle is needed to achieve the best cooperation between the twist foot 224 and the fixed block 120, and the twisting is more time-saving and labor-saving. Even if the twist foot 224 is used for a long time, it is not easy to break, which can extend the service life.

[0065] In some embodiments, Figure 2 As shown, a buffering and shock absorbing layer 600 is arranged between the display screen 530 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 530, or it can be a plurality of small modules, as long as the back of the display screen 530 is in flexible contact with the circuit board and is firmly fixed.

[0066] 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 530 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 533 of the display screen 530.

[0067] The utility model also provides an assembly method of a display module in an optimal embodiment, which is as follows: conductive foam is attached to the four sides of the display window 211 on the bottom frame 210 by conductive glue; the transparent conductive layer 400 and the display screen 530 with the protective frame 531 are assembled together by a full-fitting process, and then installed in the conductive frame 200 after assembly, and the positioning blocks 532 around the protective frame 531 enter the positioning holes 221 of the side frame 220 and are snap-fitted and fixed, so that the display screen 530 and the conductive frame 200 are fixed, and then the base 521 of the prism film 520 is installed on the backlight assembly 510, and the prism film 520 and the display screen 530 are installed together to form a display assembly, and then the display assembly is turned upside down on the circuit board, and the twist foot 224 passes through the long hole on the circuit board to the back side, and the twist foot 224 is twisted so that a micro pressure is generated between the end of the twist foot 224 and the micro-slope fixing block 120, so as to complete the assembly of the high-transparency and high-reliability military display module of the utility model.

[0068] 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 high-transmittance and high-reliability military display module, 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 is attached to the elastic conductive layer and covers at least the entire display window; as well as The display module comprises a backlight assembly, a prism film and a display screen which are sequentially installed, wherein the display screen is attached to the transparent conductive layer and aligned with the display window, and the prism film comprises a substrate installed on the surface of the backlight assembly and a plurality of rows of prisms arranged on the substrate; The conductive frame is detachably connected and buckled on the carrier, so that the transparent conductive layer and the display module are wrapped in the space between the conductive frame and the carrier to form a display module.

2. A high-transmittance and high-reliability military display module according to claim 1, characterized in that: The cross section of the prism is an isosceles triangle.

3. A high-transmittance and high-reliability military display module according to claim 2, characterized in that: The cross section of the prism is in an arc shape away from the vertex of the base.

4. The high-transmittance and high-reliability military display module 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.

5. The high-transmittance and high-reliability military display module according to claim 4, 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.

6. The high-transmittance and high-reliability military display module according to claim 5, 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 high-transmittance and high-reliability military display module according to claim 1, 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 high-transmittance and high-reliability military display module according to claim 7, 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 high-transmittance and high-reliability military display module according to claim 4, 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. A high-transmittance and high-reliability military display module according to claim 9, characterized in that: A fixing block matched with the twist foot is arranged on one side of the fixing hole, and the fixing block is provided with a slight slope.

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