Display assembly, preparation method and subway station shielding door

Abstract

The invention provides a display assembly, a preparation method and a subway station shielding door. Comprising outer glass, inner glass, a plurality of isolating bars and a display screen array, and the display screen array comprises at least two transparent display screens laid between the outer glass and the inner glass. The display screen is naturally suspended in a full-breadth mode, stress distribution is balanced, the display screen is not pressed by any structural parts except for the self weight, and therefore the influence on the display quality is reduced. An interval of 0.3 mm to 1.5 mm is arranged between every two adjacent transparent display screens. Damage caused by mutual extrusion when the whole glass bulges outwards and deforms towards one side of the outer glass under the action of wind pressure can be avoided, and the influence of too large visual gap on the viewing effect is balanced. The structural member does not directly act on the display screen array, so that the influence of stress and deformation on the display part is reduced. The thickness is controlled by the spacing layer, and the glue injection molding mode is adopted, so that the thickness difference under a large area can be fully adapted, and the optimal filling effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of shielding doors, and in particular to a display assembly, a preparation method and a shielding door for a subway station. Background Art

[0002] Conventional subway platform fixed glass doors are just a piece of 10mm or 12mm tempered glass with glass silk screen printed all around. The existing technology attaches a transparent display screen to the inner side of the glass (subway track area), making the shield door no longer a simple partition system to protect pedestrians, but also a medium for advertising, increasing the diversity of subway platforms.

[0003] The advantage of transparent screens is that they do not block the space behind the screen like conventional display screens. Chinese patent 201610828595.9 first proposed using transparent OLED screens for subway platform screen doors, and by setting sensors on both sides of the tunnel to obtain the entry and exit signals, pausing the display to make it transparent when a train is coming, and resuming the display when the train is leaving, so as to further achieve the safety guarantee required for subway operation. However, most of the existing technologies are still based on a single transparent screen fixed to the subway shielding glass. Once multiple screens are used, there are many problems with mechanical reliability and visual effects.

[0004] For example, Chinese patent 201910151577.5 proposes a stacking and fixing method for multiple layers of transparent materials that make up a display module. However, its basic method is based on constructing a fixed frame structure surrounding the display area, and then "embedding" each layer into the corresponding parallel grooves of the fixed frame for fixing. This means that when the screen area is large, the inner and outer layers separated by the hollow area, as well as the adjacent areas of the splicing edges that form the array, will be significantly deformed and squeezed or even damaged in the wind pressure of up to hundreds of Pa caused by vehicles entering and exiting the station.

[0005] How to effectively layout to form the largest possible combined transparent window is a problem. The gaps between multiple screens should be minimized as much as possible, but in actual use environments they must be able to withstand deformation caused by wind pressure and vibration generated during the movement of the train, and prevent damage caused by squeezing between the display screens. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a display component, a preparation method and a subway station shielding door, which are used to solve the above-mentioned problems existing in the prior art, reduce the visual impact when multiple screens are spliced, and reduce damage caused by mutual squeezing.

[0007] In a first aspect, a display assembly is provided, comprising an outer glass, an inner glass, a plurality of isolation strips, and a display screen array, wherein the display screen array comprises at least two transparent display screens laid flat between the outer glass and the inner glass, the isolation strips are used to isolate the display screen array from the outer glass and the inner glass of the display screen array, and a transparent adhesive layer is provided in the isolation area for adhering the front and back surfaces of the display screen array to the outer glass and the inner glass; the isolation strips are located at the side of the transparent display screen, and a spacing of 0.3 to 1.5 mm is provided between adjacent transparent display screens.

[0008] In an optional embodiment, a shielding layer is provided at the edge of the outer glass, the transparent display screen includes a screen body and an electronic wiring harness portion, the electronic wiring harness portion is used to access signals and power, the inner glass covers the screen body, and the shielding layer covers the electronic wiring harness portion and an isolation strip located at the edge of the display screen array.

[0009] In an optional implementation, the shielding layer is screen-printed with ink.

[0010] In an optional embodiment, the outer glass is tempered glass with a thickness of 6 to 10 mm, the inner glass has a thickness of 1 to 4 mm, the adhesive layer is formed by curing silicone resin, and the refractive index of the silicone resin is 1.39 to 1.52; the isolation strip is formed by a solid pressure-sensitive adhesive.

[0011] In a second aspect, a method for preparing the above-mentioned display assembly is provided, comprising the following steps:

[0012] 1) Affix the first layer of isolation strips to the inner side of the front glass to support the display array;

[0013] 2) The edges of the display surface of the transparent display screen are attached to the first layer of isolation strips one by one and pressed tightly, so that a gap is formed between the transparent display screen and the outer glass; a gap of 0.3 to 1.5 mm is set between adjacent transparent display screens;

[0014] 3) injecting liquid optical glue into the gap between the transparent display screen and the outer glass to fill it up and solidify it to form a first adhesive layer;

[0015] 4) Affix a second layer of isolation strips to both sides of the back of the display array;

[0016] 5) placing the inner glass on the second layer of isolation strips and pressing it tightly to form a gap between the inner glass and the back of the display array;

[0017] 6) Liquid optical glue is injected into the gap to fill it up and solidify to form a second adhesive layer to complete the full bonding inside.

[0018] In a third aspect, a subway platform screen door is provided, which adopts the above-mentioned display assembly.

[0019] In an optional embodiment, it further includes a supporting frame and a cover plate; the supporting frame includes two columns and a plurality of beams located between the columns; a waterproof groove surrounded by the beams and the columns is arranged at the top and / or bottom of the supporting frame, and the position of the waterproof groove corresponds to the position of the electronic wiring harness portion of the display screen array; the electronic wiring harness of the display screen array is distributed at the top and / or bottom of the inner glass, the height of the outer glass is greater than the height of the display screen array, the height of the inner glass is less than the height of the display screen array, the electronic wiring harness portion extends out of the top and / or bottom of the inner glass, the inner glass of the display assembly is adhered to the columns and the beams, the cover plate is arranged on the surface of the waterproof groove to seal it, and the top and / or bottom of the inner glass is sealed from the beams.

[0020] In an optional implementation, a sealing ring is provided between the cover plate and the waterproof groove for sealing; and a glue layer is provided between the inner glass and the cross beam for sealing and bonding.

[0021] In an optional embodiment, two height-increasing gaskets are further included, which are respectively located on the upper and lower sides of the display screen array and in the gap between the outer glass and the frame. The thickness of the height-increasing gasket is the same as the width of the gap between the outer glass and the frame. The height-increasing gasket includes a horizontal portion and a vertical portion. The vertical portion is bonded to the column of the frame and the inner side of the outer glass, and the horizontal portion is bonded to the crossbeam and the inner side of the outer glass. The gap area between the outer glass and the frame is also filled with a glue layer.

[0022] In an optional embodiment, it further includes a heat-conducting member made of a heat-conducting material, the heat-conducting member is located in the waterproof groove, the heat-conducting member is used to guide the heat of the electronic wiring harness part to the cover plate, and the cover plate is made of a metal material.

[0023] In an optional embodiment, the heat conductor is formed by bending an aluminum plate multiple times, the electronic wiring harness portion is also connected to a PCB, the PCB is provided with a layer of flexible heat dissipation silicone grease, the heat conductor includes a first surface and a second surface, the first surface of the heat conductor is bonded to the heat dissipation silicone grease layer, and the second surface is bonded to the cover plate.

[0024] In an optional implementation manner, the gap formed by the outer glass, the inner glass and the side of the display screen array is filled with glue for fixation.

[0025] Beneficial effects: The display screen is naturally suspended on the entire width, with balanced stress distribution. In addition to its own weight, it will not be subjected to the pressure of any structural parts, thereby reducing the impact on the display quality. A gap of 0.3 to 1.5 mm is set between adjacent transparent display screens. It can avoid mutual squeezing and damage when the overall bulges outward on one side of the outer glass under the action of wind pressure, and balance the visual gap that is too large to affect the viewing effect. The structural parts do not directly act on the display array, reducing the impact of force and deformation on the display part. The use of spacer layers to control thickness and inject colloid molding can fully adapt to the thickness differences in various places under a large area and achieve the best filling effect. The inner glass is covered on multiple transparent screens as a whole, and the space between the transparent screens is filled with soft colloid. In addition to dispersing and homogenizing wind pressure strain, it can prevent the destructive effects of dust particles and even gravel entering and leaving the station by trains. The laminated laminated structure formed also reduces the risk of personal injury in case of shattering. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of a display component structure provided in an embodiment of the present application;

[0028] Figure 2 An exploded view of a subway platform screen door provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. Unless otherwise defined, the technical terms or scientific terms used in this application should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "including" and other similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected", "coupled" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] The preferred embodiments of the present application are described below in conjunction with the drawings in the specification. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In addition, the embodiments and features in the embodiments of the present application may be combined with each other if there is no conflict.

[0031] Figure 1 A schematic diagram of the structure of a display assembly 10 provided in an embodiment of the present application includes an outer glass 1, an inner glass 2, a plurality of isolation strips 3 and a display array. A conventional display array is composed of 2*2 or 2*1 transparent OLED display screens 4. In this embodiment, 2*2 pieces are used. Four transparent OLED display screens 4 are laid flat between the outer glass and the inner glass. The transparent OLED display screen 4 includes a screen body and an electronic wiring harness. The sub-wiring harness is used to access signals and power. The thickness of the outer glass 1 is 6 to 10 mm. It is tempered and strengthened. The edges are screen-printed with ink to form a shielding layer 5 to shield the electronic wiring harness, PCB and other mechanical structures behind it. The thickness of the inner glass is 1 to 4 mm. The inner glass 2 covers the screen body.

[0032] The isolation bars 3 are used to isolate the display array from the outer glass 1 and the inner glass 2 of the display array. It includes two layers. The isolation bars 3 of the first layer are located between the display array and the outer glass 1. The first layer is provided with 3 or 4 isolation bars, of which two isolation bars 3 are located at the two sides of the display array, and the remaining isolation bars 3 are located in the middle of the display array. All isolation bars are arranged in parallel. Two adjacent transparent OLED display screens 4 can share one isolation bar for support and isolation, or they can be configured with isolation bars separately. The isolation bars 3 of the second layer are located between the display array and the inner glass 2. There are two isolation bars of the second layer, which are located on both sides of the display array.

[0033] The isolation area formed by the isolation strip 3, the outer glass 1 and the inner glass 2 is provided with a transparent adhesive layer 6 for bonding the front and back sides of the display array to the outer glass and the inner glass; the adhesive layer is solidified by organic silicone resin, and the refractive index of the organic silicone resin is 1.39-1.52; the isolation strip is formed by solid pressure-sensitive adhesive. There is a gap of 0.3-1.5mm between adjacent transparent display screens. The reason for choosing this range is that because the screen has a certain thickness, if it is too close, it will squeeze each other and cause damage when the whole bulges outwards to the outer glass side under the action of wind pressure, and if it is too far away, it will cause too large a visual gap to affect the viewing effect.

[0034] The display component can achieve the largest continuous transparent display area, which can reach more than 3.3 square meters, and the invalid display seam ratio of the multi-screen array is less than 1.5%.

[0035] Calculation basis: Assuming that the single OLED screen has an invalid area of ​​6mm on one side, the physical seam is controlled at 0.5mm, and the double sides are 12.5mm in total, then 12.5mm*(1.22m+0.68m)*2 / (1.22m*0.68m*4)=1.43%.

[0036] It also has good permeability, and the cumulative additional reflection loss of the internal interface does not exceed 0.5%, while according to the comparative document method it will reach 16%.

[0037] Calculation basis: There are 4 refractive index gradient interfaces in 2 filling glue layers, according to the Fresnel formula R = 4*[(1.5-1.41) / (1.5+1.41)]2 = 0.38%.

[0038] The entire display screen is naturally suspended with balanced stress distribution. It will not be compressed by any structural parts except its own weight, thus reducing the impact on display quality.

[0039] Corresponding to the above display assembly, the embodiment of the present application further provides a preparation method, comprising the following steps:

[0040] 1) A first layer of isolation strips 3 is attached to the inner side of the front glass 1 to support the display array;

[0041] 2) The edges of the display surface of the transparent OLED display screen 4 are attached to the first layer of isolation strips one by one and pressed tightly, so that the transparent OLED display screen 4 is connected to the outer glass 1 at the edge through the isolation strips, and a gap is formed in the middle; a gap of 0.3 to 1.5 mm is set between adjacent transparent display screens;

[0042] 3) injecting liquid optical glue into the gap between the transparent display screen and the outer glass, filling it up and curing it to form a first adhesive layer;

[0043] 4) A second layer of isolation strips 3 is attached to both sides of the back of the display array;

[0044] 5) placing the inner glass 2 on the second layer of isolation strips 3 and pressing them tightly to form a gap between the inner glass and the back of the display array;

[0045] 6) Liquid optical glue is injected into the gap to fill it up and solidify to form a second adhesive layer to complete the full bonding inside.

[0046] Corresponding to the above display assembly, the embodiment of the present application also provides a subway platform screen door, such as Figure 2 As shown, it also includes a support frame 40 and a cover plate 60. The support frame 40 is welded from stainless steel square tubes (the surface needs to be treated with anti-rust and anti-salt spray). The specific square tube specifications and dimensions should comply with the corresponding detailed dimensions provided by the project subway party to prevent the phenomenon of being unable to install or installing smoothly due to size problems.

[0047] The support frame 40 includes two columns 401 and a plurality of beams 402 between the columns. The top and bottom of the support frame are provided with waterproof grooves 403 surrounded by beams and columns. The position of the waterproof grooves 403 corresponds to the position of the electronic wiring harness of the display array. A partition plate can be further provided in the waterproof grooves 403 to divide each waterproof groove into two waterproof grooves. Each waterproof groove 403 corresponds to an electronic wiring harness in a transparent OLED display 4.

[0048] The electronic wire harness of the upper transparent OLED display screen 4 in the display screen array is distributed on the top of the inner glass, while the electronic wire harness of the lower transparent OLED display screen 4 is distributed on the bottom of the inner glass. The height of the outer glass 1 is greater than the height of the display screen array, and the height of the inner glass 2 is less than the height of the display screen array so that the electronic wire harness can extend out of the inner glass 2. The inner glass of the display assembly is pasted on the columns and beams. The number of cover plates 60 corresponds to the waterproof groove, and they are arranged on the surface of the waterproof groove to seal it. The top and bottom of the inner glass are sealed and fixed to the beams by gluing.

[0049] Since the track area is cleaned regularly, the equipment is prone to water ingress during cleaning, and a waterproof groove 403 is provided to prevent water from entering the equipment. A sealing ring 50 is also provided between the cover plate 60 and the waterproof groove 403 for sealing, further reducing water ingress to the equipment.

[0050] In order to achieve the stability of the device, two heightening gaskets are provided, namely, an upper heightening gasket 30 and a lower heightening gasket 20. The two are respectively located on the upper and lower sides of the display array and in the gap between the outer glass 1 and the supporting frame 40. The heightening gasket is made of ABS material, and the thickness of the heightening gasket is the same as the width of the gap between the outer glass 1 and the supporting frame 40. The heightening gasket includes a horizontal part and a vertical part. The vertical part is bonded to the column 401 and the inner side of the outer glass, and the horizontal part is bonded to the crossbeam 402 and the inner side of the outer glass. The gap area between the outer glass and the frame is also filled with a glue layer.

[0051] In addition, in order to improve the heat dissipation effect, a heat conductive member 70 made of a heat conductive material is provided. The heat conductive member 70 is located in the waterproof groove. The heat conductive member 70 is used to guide the heat of the electronic wiring harness to the cover plate 60. The cover plate 60 is made of a metal material.

[0052] The heat conducting member 70 is formed by bending an aluminum plate four times, 90°, -90°, 90°, and -90° in sequence. The electronic wiring harness is also connected to the PCB board, which is provided with a layer of flexible heat dissipation silicone grease. The heat conducting member 70 includes a first surface and a second surface. The first surface of the heat conducting member is bonded to the heat dissipation silicone grease layer, and the second surface is bonded to the cover plate. The heat conducting member conducts the heat generated by the wiring harness and the PCB to the lower cover plate, thereby achieving overall heat dissipation.

[0053] In addition, the gap formed by the outer glass 1, the inner glass 2 and the side of the display screen array is filled with glue for fixation.

[0054] The subway platform screen door is assembled as follows:

[0055] ① Gluing the support frame: After the support frame is processed according to the drawing, wipe the surface of the frame with a dust-free cloth. First, glue 6mm EVA double-sided tape on the surface of the frame where the glass display component is bonded, mainly to prevent glue overflow during the subsequent gluing process; at the same time, glue 6mm ABS height increase gaskets on the frame to support the display system;

[0056] ②Support the frame and glass display assembly: After placing the frame with the front side facing up, place the outer side of the glass inside the display assembly on the frame, calibrate the relative position of the display assembly and the frame, and then clamp the display system and the frame up and down with clips;

[0057] ③ Gluing: Apply special fixed structural glue at the 6mm gap between the frame and the glass display component. Glue should be applied at the junction of the display component and the frame. On the one hand, it is fixed, and on the other hand, it plays a waterproof role. After curing for 8 hours, the frame and the display component become a whole;

[0058] ④Install the software circuit part: install the board and manage the cables;

[0059] ⑤Install heat-conducting structural parts: Place a piece of heat-dissipating silicone grease on the top of each board to conduct the heat of the board to the lower cover through the structural parts, thereby achieving overall heat dissipation;

[0060] ⑥Fix the U-shaped waterproof rubber strip: Use glue to fix a circle of sealing ring at the frame waterproof structure;

[0061] ⑦ Lock the upper and lower covers: Use cross-slot screws with rubber rings to lock the upper and lower covers.

[0062] The shield door structure of this structure is stable, and it can withstand a high threshold of transient wind pressure when entering and exiting the subway station. There will be no debonding on the bonding surface even under negative pressure conditions.

[0063] The structural components do not directly act on the display array, thus reducing the impact of stress and deformation on the display part.

[0064] The method of controlling thickness by spacer layer and injecting colloid to form can fully adapt to the thickness differences in various places under large areas and achieve the best filling effect.

[0065] Waterproof and dustproof, it has strong resistance to adverse working conditions (dust, water splash, gravel, humidity and heat) brought by the vehicle body in the tunnel. It reaches the IP65 dustproof and waterproof level.

[0066] Obviously, those skilled in the art can make various changes and modifications to the embodiments in the present application without departing from the spirit and scope of the embodiments in the present application. Thus, if these modifications and variations of the embodiments in the present application fall within the scope of the claims and their equivalents in the embodiments of the present application, the embodiments of the present application are also intended to include these modifications and variations.

Claims

1. A display component, characterized in that: The invention comprises an outer glass, an inner glass, a plurality of isolation strips and a display screen array, wherein the display screen array comprises at least two transparent display screens laid flat between the outer glass and the inner glass, the isolation strips are used for isolating the display screen array from the outer glass and the inner glass of the display screen array, and a transparent adhesive layer is arranged in the isolation area for adhering the front and back sides of the display screen array to the outer glass and the inner glass; the isolation strips are located at the edge of the transparent display screen, and a spacing of 0.3 to 1.5 mm is arranged between adjacent transparent display screens.

2. The display assembly according to claim 1, wherein: A shielding layer is provided at the edge of the outer glass. The transparent display screen includes a screen body and an electronic wiring harness portion. The electronic wiring harness portion is used to access signals and power. The inner glass covers the screen body. The shielding layer covers the electronic wiring harness portion and the isolation strip located at the edge of the display screen array. The shielding layer is screen-printed with ink.

3. The display assembly according to claim 1, wherein: The outer glass is tempered glass with a thickness of 6 to 10 mm, the inner glass has a thickness of 1 to 4 mm, the adhesive layer is formed by curing organic silicone resin, and the refractive index of the organic silicone resin is 1.39 to 1.52; the isolation strip is formed by solid pressure-sensitive adhesive.

4. A method for preparing a display component, used for preparing a display component as claimed in any one of claims 1 to 3, characterized in that: The steps include: 1) Affix the first layer of isolation strips to the inner side of the front glass to support the display array; 2) The edges of the display surface of the transparent display screen are attached to the first layer of isolation strips one by one and pressed tightly, so that a gap is formed between the transparent display screen and the outer glass; a gap of 0.3 to 1.5 mm is set between adjacent transparent display screens; 3) injecting liquid optical glue into the gap between the transparent display screen and the outer glass to fill it up and solidify it to form a first adhesive layer; 4) Affix a second layer of isolation strips to both sides of the back of the display array; 5) placing the inner glass on the second layer of isolation strips and pressing it tightly to form a gap between the inner glass and the back of the display array; 6) Liquid optical glue is injected into the gap to fill it up and solidify to form a second adhesive layer to complete the full bonding inside.

5. A subway platform screen door, characterized in that: A display assembly as described in any one of claims 1 to 5 is used.

6. The subway platform screen door according to claim 5, characterized in that: Also includes a support frame and a cover plate; The support frame includes two columns and a plurality of beams between the columns. A waterproof groove surrounded by the beams and the columns is arranged on the top and / or bottom of the support frame. The position of the waterproof groove corresponds to the position of the electronic harness of the display array. The electronic harness of the display screen array is distributed on the top and / or bottom of the inner glass, the height of the outer glass is greater than the height of the display screen array, the height of the inner glass is less than the height of the display screen array, the electronic harness portion extends out of the top and / or bottom of the inner glass, the inner glass of the display assembly is pasted on the columns and beams, the cover plate is arranged on the surface of the waterproof groove to seal it, and the top and / or bottom of the inner glass is sealed with the beams.

7. The subway platform screen door according to claim 6, characterized in that: A sealing ring is also provided between the cover plate and the waterproof groove for sealing; and a glue layer is provided between the inner glass and the cross beam for sealing and bonding.

8. The subway platform screen door according to claim 7, characterized in that: It also includes a heat conducting member and two height-increasing gaskets, which are respectively located at the upper and lower sides of the display array and in the gap between the outer glass and the frame. The thickness of the height-increasing gasket is the same as the width of the gap between the outer glass and the frame. The height-increasing gasket includes a horizontal portion and a vertical portion. The vertical portion is in contact with the upright column of the frame and the inner side of the outer glass. The horizontal portion is in contact with the crossbeam and the inner side of the outer glass. The gap between the outer glass and the frame is also filled with a glue layer. The heat-conducting member is made of a heat-conducting material, is located in the waterproof groove, and is used to guide the heat of the electronic wiring harness to the cover plate, which is made of a metal material.

9. The subway platform screen door according to claim 8, characterized in that: The heat conductor is formed by bending an aluminum plate multiple times. The electronic wiring harness is also connected to a PCB. The PCB is provided with a flexible heat dissipation silicone grease layer. The heat conductor includes a first surface and a second surface. The first surface of the heat conductor is bonded to the heat dissipation silicone grease layer, and the second surface is bonded to the cover plate.

10. The subway platform screen door according to claim 9, characterized in that: The gaps formed by the outer glass, the inner glass and the side of the display screen array are filled with glue for fixation.

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