Front frame assembly, integrated display device and assembling method thereof, smart blackboard

Abstract

The application discloses a front frame assembly, an integrated display device and an assembling method thereof and a smart blackboard, and belongs to the field of display and education equipment.The front frame assembly is characterized in that a writing glass is connected to a frame, the back of the writing glass directly contacts and is adsorptively attached to the front of a liquid crystal glass, and a plurality of fixing mechanisms are arranged around the periphery of the liquid crystal glass and used for fixing the liquid crystal glass on the writing glass.On one hand, the application does not need to fill a transparent medium between the writing glass and the liquid crystal glass, no bubbles are generated between the writing glass and the liquid crystal glass, the attachment process of the writing glass and the liquid crystal glass is simpler, and the product yield of the display device is improved; on the other hand, the application directly adsorptively attaches the liquid crystal glass to the writing glass, so that the liquid crystal glass, the writing glass and the frame are formed into the front frame assembly, the assembling process of the display device can be greatly simplified, and the assembling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display and educational equipment, and more specifically, to a front frame assembly, an integrated display device and an assembly method thereof, and a smart blackboard. Background Art

[0002] Liquid crystal displays (LCDs) are common components used to implement display functions in display devices and educational equipment such as smart blackboards. In particular, transparent tempered glass is often placed over the LCD to enable projection, display, writing, and touch functions, allowing for writing on the blackboard.

[0003] In addition, in order to prevent the presence of air or other media between the display glass and the writing glass of the display panel, which would lead to a deterioration in the display effect, in related fields, transparent media are usually filled between the display glass and the writing glass. These transparent media can be used as adhesives to achieve full bonding of the display glass and the writing glass, or to stick the edges of the display glass and the writing glass together, and to perform vacuum treatment between the display glass and the writing glass.

[0004] For example, Chinese patent application number 2018206205193 discloses a fully laminated touch screen, electronic blackboard, and multimedia all-in-one machine, including a glass cover, a touch film, and a display module. The glass cover is fully laminated to one side of the touch film via optical adhesive, and the other side of the touch film is fully laminated to the display module via silicone. By using OCA optical adhesive and silicone, a touch display screen is provided in which the glass cover, touch screen, and display module are fully laminated. Since no air can enter, there is no need to set an elastic seal between the display screen and the touch film. The fingers feel direct contact with the screen display, which provides a better writing effect. Due to the full lamination, the writing on the blackboard can be clearly seen even when the blackboard is on the side, which provides a better display effect and a wider visual range.

[0005] For example, the Chinese patent application number 2019106519630 discloses an electronic blackboard including a main board and a first sub-board and a second sub-board arranged on both sides of the main board, wherein the main board includes a writing frosted glass display layer, a touch film layer, and a display screen layer. The touch film layer is located between the writing frosted glass display layer and the display screen layer. The touch film layer is tightly fitted to the writing frosted glass display layer, and the touch film layer is tightly fitted to the display screen layer. The touch film layer and the frosted glass display layer are fixed by OCA optical glue or UV shadowless glue.

[0006] However, this process of bonding writing glass and liquid crystal glass requires the use of transparent media such as OCA optical glue, silicone, and UV shadowless glue. If bubbles appear between the writing glass and the liquid crystal glass, or if the thickness of the transparent media is different, the display effect of the display will be reduced and the product yield will be reduced. At the same time, the use of transparent media to bond the writing glass and liquid crystal glass makes the assembly method of bonding the writing glass and liquid crystal glass more complicated and the cost is relatively high. Summary of the Invention

[0007] 1. Technical problem to be solved by the invention

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art in which the process is complicated and the assembly efficiency is low when using transparent media to bond writing glass and liquid crystal glass. A front frame assembly, an integrated display device and its assembly method, and a smart blackboard are provided to simplify the assembly process and improve assembly efficiency.

[0009] 2. Technical solution

[0010] In order to achieve the above object, the technical solution provided by the present invention is:

[0011] A front frame assembly of the present invention includes a frame and liquid crystal glass, as well as a writing glass arranged on the frame, and also includes several fixing mechanisms. The frame is arranged on the periphery of the writing glass, and the liquid crystal glass is placed on the writing glass. The front surface of the liquid crystal glass is in direct contact with the back surface of the writing glass and is adsorbed and adhered to it. Several fixing mechanisms are arranged around the four sides of the liquid crystal glass, and the fixing mechanisms are used to fix the liquid crystal glass on the writing glass.

[0012] Furthermore, an infrared touch module is provided on the frame, and the infrared touch module is used to form an infrared grid on the front surface of the writing glass to realize touch operation.

[0013] Furthermore, the back surface of the writing glass and the front surface of the liquid crystal glass are adhered to each other by vacuum adsorption or electrostatic adsorption.

[0014] Furthermore, a touch film is attached to the back of the writing glass. The back of the touch film replaces the back of the writing glass and directly contacts and adheres to the front of the liquid crystal glass.

[0015] Furthermore, the back surface of the touch film and the front surface of the liquid crystal glass are adhered to each other by vacuum adsorption or electrostatic adsorption.

[0016] Furthermore, the touch film component includes a touch film and an insulating film, and the back surface of the insulating film is in direct contact with and adsorbed on the front surface of the liquid crystal glass.

[0017] Furthermore, the back surface of the insulating film and the front surface of the liquid crystal glass are adhered to each other by vacuum adsorption or electrostatic adsorption.

[0018] Furthermore, the frame includes an upper profile, a lower profile, a left profile and a right profile, and the upper profile, lower profile, left profile and right profile are arranged to surround the writing glass, and the upper profile, lower profile, left profile and right profile are connected by fasteners or by gluing.

[0019] Furthermore, among the upper profile, lower profile, left profile and right profile, at least the upper profile and the lower profile are provided with fixing grooves, and the upper and lower edges of the writing glass are respectively clamped in the fixing grooves of the upper profile and the lower profile.

[0020] Furthermore, the fixing groove is opened on the front side of the frame.

[0021] Furthermore, the fixing mechanism includes a pressing piece, which is movably connected to the frame, or rotatably connected, or detachably connected, and is used to press the liquid crystal glass.

[0022] Furthermore, the fixing mechanism includes a pressing piece and a connecting piece, the connecting piece is detachably connected to the frame, the pressing piece is movably, rotatably, or detachably connected to the connecting piece, and the pressing piece is used to press the liquid crystal glass.

[0023] Furthermore, the pressing piece includes a pressing plate, and sliding grooves are provided on both sides of the pressing plate. The pressing piece is movably connected to the connecting piece through the sliding grooves.

[0024] Furthermore, the pressing plate is provided with a first pressing portion arranged parallel to the writing glass, and a supporting portion arranged perpendicular to the writing glass. The first pressing portion is used to press fit with the liquid crystal glass, and a supporting structure for placing the edge of the optical film is formed between the first pressing portion and the supporting portion.

[0025] Furthermore, the connecting member includes a lower mounting plate arranged parallel to the writing glass, and a connecting plate arranged perpendicular to the writing glass, and the connecting plate is provided with a connecting hole for cooperating with the fixing hole on the frame; the pressing plate is slidably arranged on the lower mounting plate.

[0026] Furthermore, a rib is provided between the connecting plate and the lower mounting plate, and the rib is provided perpendicular to both the connecting plate and the lower mounting plate.

[0027] Furthermore, the fixing mechanism also includes a fixing cover, which is detachably connected to the connecting member, and the lower edge of the fixing cover cooperates with the first pressing portion to press the optical film; the upper side of the fixing cover is used to press against the back panel.

[0028] Furthermore, an upper mounting plate is provided on the side of the connecting plate away from the lower mounting plate, and the lower mounting plate and the upper mounting plate are respectively provided with upper mounting holes and lower mounting holes at corresponding positions, and the fixing cover is provided with pins that cooperate with the upper mounting holes and the lower mounting holes.

[0029] Furthermore, a second pressing portion is provided on the upper side of the fixed cover and is arranged perpendicular to the writing glass, and the second pressing portion is used to press against the back plate.

[0030] An integrated display device of the present invention includes a back panel and the above-mentioned front frame assembly, wherein the back panel is detachably connected to the frame, and the fixing mechanism of the front frame assembly is used to cooperate with the back panel so that the fixing mechanism can press and fix the liquid crystal glass on the writing glass.

[0031] Furthermore, a light strip, an optical film and a reflective film are provided in the cavity enclosed by the back panel and the front frame assembly, the light strip is connected to the back panel, a plurality of lamp holes are opened on the reflective film, the number, position and size of the lamp holes correspond to the lamp beads on the light strip, the reflective film is fixed to the back panel through a plurality of top light columns; the edge of the optical film is fixed to the fixing mechanism, and a plurality of the top light columns are located between the optical film and the reflective film.

[0032] Furthermore, a light leakage prevention structure is provided on the writing glass near the four edges. The light leakage prevention structure is formed by a light-shielding material attached to the writing glass, or is formed by silk-screen ink on the writing glass.

[0033] The assembly method of the above-mentioned integrated display device is to first fix the writing glass to the frame, then directly contact and adsorb the liquid crystal glass to the writing glass, and use a fixing mechanism to fix the writing glass on the liquid crystal glass to form a front frame assembly; finally, the front frame assembly is connected to the back panel assembly to assemble into an integrated display device.

[0034] Furthermore, the method specifically includes the following steps:

[0035] Step 1: Arrange the upper profile, lower profile, left profile, and right profile around the writing glass and connect them to form a frame to fix the writing glass;

[0036] Step 2: Place the liquid crystal glass on the writing glass so that the back of the writing glass is in direct contact with the front of the liquid crystal glass and adheres to it by adsorption; then, connect a plurality of fixing mechanisms disposed around the liquid crystal glass to the frame, and through the cooperation of the plurality of fixing mechanisms, fix the liquid crystal glass to the writing glass; fix the edge of the optical film to the fixing mechanisms;

[0037] Step 3: Connect the light strip to the front of the back panel and fix the reflective film to the back panel through several top light columns;

[0038] Step 4: Connect the back panel to the frame, connect the electrical box to the back of the back panel, and connect the lower functional area component to the lower profile of the frame to complete the assembly of the integrated display device.

[0039] A smart blackboard of the present invention includes the integrated display device described in claim 20, and a writing board is connected to at least one of the left and right sides of the integrated display device.

[0040] 3. Beneficial effects

[0041] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0042] (1) The front frame assembly of the present invention has a writing glass connected to the frame, and the back of the writing glass is in direct contact with and adsorbed to the front of the liquid crystal glass. A plurality of fixing mechanisms are arranged around the four sides of the liquid crystal glass, and the plurality of fixing mechanisms cooperate with each other to fix the liquid crystal glass to the writing glass. Therefore, on the one hand, there is no need to fill a transparent medium such as OCA optical glue, silicone, UV shadowless glue between the writing glass and the liquid crystal glass, and no bubbles are generated between the writing glass and the liquid crystal glass, making the bonding process of the writing glass and the liquid crystal glass simple, thereby improving the assembly efficiency and product yield of the display device; on the other hand, the present invention directly adsorbs and bonds the liquid crystal glass and the writing glass, so that the liquid crystal glass, the writing glass, and the frame form a front frame assembly, rather than forming a display module by combining the liquid crystal glass with components such as a light bar, a reflective film, an optical film, and a sunshade. The assembly of the integrated display device can be completed by simply connecting the front frame module and the back panel module, which can greatly simplify the assembly process of the display device, thereby improving the assembly efficiency.

[0043] (2) In the present invention, the fixing mechanism includes a connector, a pressure piece, and a fixing cover. The connector is provided on the frame, and the pressure piece is movably connected to the connector and can slide relative to the connector to fix the liquid crystal glass to the writing glass. At the same time, the fixing cover can be fixed to the connector via a pin to fix the optical film, and the upper end of the fixing cover can abut against the back plate. Therefore, the present invention only needs to fix the back plate to the frame to complete the fixing of the liquid crystal glass, the optical film, and the fixing mechanism, further improving the assembly efficiency of the display device.

[0044] (3) In the present invention, a light bar, an optical film and a reflective film are arranged in the cavity enclosed by the back panel and the front frame assembly, and the optical film is fixed by a number of fixing mechanisms; the light bar, the reflective film, the top light column and other components are integrated on the back panel and connected to form a whole back panel module. During assembly, the back panel can be directly connected to the frame to complete the installation and fixation of the light bar, the reflective film, the top light column and other components, thereby further improving the assembly efficiency of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic structural diagram of the front frame assembly of the present invention;

[0046] Figure 2 It is a structural schematic diagram of the fixing mechanism in the present invention;

[0047] Figure 3 is a schematic structural diagram of the integrated display device of the present invention;

[0048] Figure 4 Schematic diagram of the explosion of the components of the integrated display device of the present invention;

[0049] Figure 5 Schematic diagram of the structure of the backplane module in the present invention;

[0050] Figure 6 Schematic diagram of the coordination relationship between the back plate and the reflective film in the present invention;

[0051] Figure 7 A schematic diagram of the assembly process of the integrated display device of the present invention;

[0052] Figure 8 This is a schematic diagram of the smart blackboard structure of the present invention. DETAILED DESCRIPTION

[0053] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments.

[0054] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology. They are not used to limit the conditions for implementation of the present invention and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose of the present invention. At the same time, if the terms "upper", "lower", "left", "right", "middle" and so on are quoted in this specification, they are only for the convenience of description and are not used to limit the scope of implementation. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0055] In the related field, the LCD display device of a smart blackboard generally includes components such as a frame, a writing glass 1, an LCD display module, a backplane, and an electrical control box. Typically, the LCD display module integrates components such as the screen and backlight, while the writing glass 1, display module, and electrical control box are all connected to the frame, or at least the writing glass 1 and display module are connected and fixed via grooves in the frame.

[0056] Generally, there are at least two ways to bond the writing glass 1 to the display module screen, that is, the writing glass 1 and the liquid crystal glass 3. One method is to fill the writing glass 1 with a transparent medium such as OCA optical glue, silicone, or UV shadowless glue. This allows the writing glass 1 and the liquid crystal glass 3 to adhere together while preventing light from passing through the gap between them. Alternatively, the gap between the writing glass 1 and the liquid crystal glass 3 is compressed during writing, causing changes in the refraction of light and reducing the display effect.

[0057] Another way is to glue and seal the edges of the writing glass 1 and the liquid crystal glass 3, and then extract the air between the writing glass 1 and the liquid crystal glass 3 to form a negative pressure or even a vacuum environment, thereby achieving the bonding of the writing glass 1 and the liquid crystal glass 3.

[0058] However, when filling the space between the writing glass 1 and the liquid crystal glass 3 with a transparent medium such as OCA optical glue, silicone, or UV adhesive, the thickness and uniformity of the OCA adhesive, silicone, or UV adhesive are difficult to accurately control. This can easily lead to bubbles forming between the writing glass 1 and the liquid crystal glass 3, thus reducing the display quality. Furthermore, the transparent medium filling process requires high standards, and the process of gluing and hollowing out the writing glass 1 and the liquid crystal glass 3 is complex. Consequently, both methods result in low product yields, complex processes, and low assembly efficiency.

[0059] To address the aforementioned issues, this embodiment provides a front frame assembly. The writing glass 1 and liquid crystal glass 3 of the front frame assembly are in direct contact and adhere to each other through adsorption, and are secured together by a fixing structure. This eliminates the need for transparent filling, gluing, or hollowing, simplifying the process and increasing assembly efficiency. Furthermore, due to the direct contact between the writing glass 1 and liquid crystal glass 3, virtually no air is trapped between them, resulting in a better display quality and significantly improved product yield.

[0060] Specifically, refer to Figure 1 The front frame assembly of this embodiment may include a frame, a writing glass 1, a liquid crystal glass 3, and a plurality of fixing mechanisms. The writing glass 1 is arranged on the frame, and the edge of the writing glass 1 can be connected to the frame, for example, by gluing or fastening. The liquid crystal glass 3 can be placed on the writing glass 1 so that the back of the writing glass 1 and the front of the liquid crystal glass 3 are in direct contact and adhere to each other. Specifically, the adsorption and adhesion of the writing glass 1 and the liquid crystal glass 3 can be achieved by electrostatic adsorption, vacuum adsorption, etc.; a plurality of fixing mechanisms can be arranged around the four sides of the liquid crystal glass 3. The fixing mechanisms can be connected to the frame or directly drawn out from the frame, that is, the fixing mechanisms can also be structures formed by the frame during the stamping process. The plurality of fixing mechanisms can cooperate with each other to fix the liquid crystal glass 3 on the writing glass 1 from all directions around the liquid crystal glass 3.

[0061] After the writing glass 1 and the liquid crystal glass 3 are adsorbed and bonded, intermolecular forces create a strong bond between them in a direction perpendicular to the writing glass 1, making it difficult to separate them perpendicularly. However, the bond between them in a direction parallel to the writing glass 1 is weaker. Therefore, in this embodiment, several fixing mechanisms surrounding the liquid crystal glass 3 are employed to restrict relative movement between the writing glass 1 and the liquid crystal glass 3 in a direction parallel to the writing glass 1. This prevents the writing glass 1 and the liquid crystal glass 3 from losing contact or shifting parallel to the writing glass 1 after the display device is mounted.

[0062] The frame can specifically include an upper profile 4, a lower profile 5, a left profile 6 and a right profile 7. The upper profile 4, the lower profile 5, the left profile 6 and the right profile 7 are respectively arranged on the upper, lower, left and right sides of the writing glass 1 to surround the writing glass 1; the upper profile 4, the lower profile 5, the left profile 6 and the right profile 7 are connected to each other, specifically, the left and right ends of the upper profile 4 are respectively connected to the upper ends of the left profile 6 and the right profile 7, and the left and right ends of the lower profile 5 are respectively connected to the lower ends of the left profile 6 and the right profile 7. The connection method can be a fastener connection or an adhesive connection.

[0063] In order to realize the connection and fixation of the frame to the writing glass 1, a fixing groove can be formed on the frame, and the edge of the writing glass 1 can be clamped / plugged into the fixing groove. At the same time, an adhesive can also be filled in the fixing groove to connect the edge of the writing glass 1 to the fixing groove by means of adhesion. When the frame is formed by the mutual connection of the upper profile 4, the lower profile 5, the left profile 6 and the right profile 7, the upper profile 4, the lower profile 5, the left profile 6 and the right profile 7 can be provided with fixing grooves for fixing the edges of the writing glass 1 around, respectively. In addition, the fixing grooves can also be formed only on the upper profile 4 and the lower profile 5, and the upper edge of the writing glass 1 can be clamped / fixed in the fixing groove of the upper profile 4, and the lower edge of the writing glass 1 can be clamped / fixed in the fixing groove of the lower profile 5.

[0064] In the following,

[0065] The front frame assembly of the present embodiment can be used as educational equipment, and thus in order to realize human-computer interaction to improve the teaching quality, a touch mechanism for realizing touch control function can be provided on the front frame assembly.

[0066] As an embodiment of the touch mechanism, the front frame assembly can adopt infrared touch. Specifically, an infrared touch module can be provided on the frame, which is used to form an infrared grid on the front surface of the writing glass, and then realize infrared touch operation. The specific structure, working principle and cooperation mode with the frame of the infrared touch module can be implemented according to the contents disclosed in the prior art or according to the recommended mode of the manufacturer. For example, infrared lamp strip grooves, light filtering strip grooves and other structures can be formed on the frame, and infrared lamp strips and light filtering strips can be installed therein, and the infrared lamp strips on the opposite sides of the frame can be infrared emitting lamp strips and infrared absorbing lamp strips, respectively. For another example, it can be the infrared touch module disclosed in Chinese patents with application numbers 2019111255098, 2021204000913, 2020202546815 and 2020201234337.

[0067] As another embodiment of the touch mechanism, the front frame assembly can adopt capacitive touch. Specifically, a touch film 2 can be provided between the writing glass 1 and the liquid crystal glass 3, and the touch film 2 is used to realize touch operation. The specific structure and working principle of the touch film 2 can be implemented according to the contents disclosed in the prior art or according to the recommended mode of the manufacturer. For example, the capacitive touch film disclosed in Chinese patent documents with application numbers 2016211463514 and 2017214543712.

[0068] In addition, it is worth mentioning that when the current frame assembly adopts capacitive touch, the writing glass 1 and the liquid crystal glass 3 are provided with a touch film 2, the back of the touch film 2 directly contacts and is adsorbed and attached to the front of the liquid crystal glass 3 instead of the back of the writing glass 1. The back of the touch film 2 and the front of the liquid crystal glass 3 can be adsorbed and attached by vacuum adsorption, electrostatic adsorption and the like.

[0069] As a further optimization, the back of the touch film 2 can be attached with an insulating film, and the touch film 2 and the insulating film together form a touch film piece; the back of the insulating film directly contacts and is adsorbed and attached to the front of the liquid crystal glass 3 instead of the back of the touch film 2. The back of the insulating film and the front of the liquid crystal glass 3 are adsorbed and attached by vacuum adsorption or electrostatic adsorption. The insulating film is used to shield the electrical interference between the touch film 2 and the liquid crystal glass 3. The insulating film can be a PC film or a PET film.

[0070] In the following,

[0071] As one of the embodiments of the fixing mechanism of the present embodiment, the fixing structure can be a pressing piece 8, which can be movably connected, rotatably connected or detachably connected with the frame. After the writing glass 1 is fixed with the frame, the pressing piece 8 can be connected with the frame first, and then moved / rotated to a position that does not hinder the placement of the liquid crystal glass 3. When the liquid crystal glass 3 is placed on the writing glass 1 and the adsorption and attachment are completed, the pressing piece 8 is moved / rotated to press the liquid crystal glass 3 tightly on the writing glass 1. When the pressing piece 8 is detachably connected with the frame, the pressing piece 8 is connected with the frame to press and fix the liquid crystal glass 3 on the writing glass 1. In addition, when the back of the writing glass 1 is provided with the touch film 2, the pressing piece 8 presses the liquid crystal glass 3 tightly on the touch film 2.

[0072] As another embodiment of the fixing mechanism of the present embodiment, the fixing structure can include a pressing piece 8 and a connecting piece 9. The connecting piece 9 can be detachably connected with the frame, and the pressing piece 8 can be movably connected, rotatably connected or detachably connected with the connecting piece 9. The pressing piece 8 can be slidably connected with the connecting piece 9, and after the pressing piece 8 slides relative to the connecting piece 9, the liquid crystal glass 3 is fixed on the writing glass 1. The pressing piece 8 can be rotatably connected with the connecting piece 9, and after the pressing piece 8 rotates relative to the connecting piece 9, the liquid crystal glass 3 is fixed on the writing glass 1. The pressing piece 8 can be detachably connected with the connecting piece 9, and after the pressing piece 8 is connected with the connecting piece 9, the liquid crystal glass 3 is fixed on the writing glass 1.

[0073] Specifically, when the pressing piece 8 and the connecting piece 9 are in a sliding connection, the pressing piece 8 may include a pressing plate 81, and a sliding groove 82 is respectively provided on both sides of the pressing plate 81. A slider / convex strip that cooperates with the sliding groove 82 is provided on the connecting piece 9, and the pressing plate 81 realizes a sliding connection with the connecting piece 9 through the sliding groove 82.

[0074] More specifically, the pressing member 8 may include a pressing plate 81, a support portion 83, and a first pressing portion 84. The first pressing portion 84 and the support portion 83 are disposed on the side of the pressing plate 81 proximal to the liquid crystal glass 3. The first pressing portion 84 is disposed parallel to the liquid crystal glass 3 and is used to press the liquid crystal glass 3 against the writing glass 1. The support portion 83 is disposed perpendicular to the liquid crystal glass 3 and is used to support other components of the display device. For example, a support structure for the edge of the optical film 10 can be formed between the support portion 83 and the first pressing portion 84. The optical film 10 can be mounted in the display device through the cooperation of several fixing mechanisms.

[0075] The connector 9 may include a lower mounting plate 92 and a connecting plate 91. The lower mounting plate 92 is positioned parallel to the writing glass 1, while the connecting plate 91 is positioned perpendicular thereto. Connecting holes 98 are defined in the connecting plate 91, which mate with fixing holes in the frame. Fasteners such as connecting bolts can be inserted through the connecting holes 98 and the fixing holes to connect the connector 9 to the frame. The lower mounting plate 92 is used to mount the compression member 8. The edges of the lower mounting plate 92 mate with the slide grooves 82 on either side of the compression plate 81, enabling a sliding connection between the lower mounting plate 92 and the compression member 8.

[0076] Two stoppers 94 may be provided at the front end of the lower mounting plate 92, i.e., the free end of the lower mounting plate 92 away from the connecting plate 91. A notch 97 is formed between the two stoppers 94. The notch 97 is configured to engage with the first pressing portion 84 on the holding plate 81. The stoppers 94 are configured to limit movement of the holding plate 81 in a direction parallel to the writing glass 1. This causes the holding plate 81 to return to its original position after pressing the liquid crystal glass 3, thereby reducing the stability of the connection between the liquid crystal glass 3 and the writing glass 1.

[0077] As a further optimization of this embodiment, a rib 99 can be further provided between the connecting plate 91 and the lower mounting plate 92. The rib 99 can be provided perpendicular to both the connecting plate 91 and the lower mounting plate 92. The rib 99 is used to strengthen the connection strength between the connecting plate 91 and the lower mounting plate 92, thereby improving the fixing effect of the fixing mechanism on the liquid crystal glass 3 and the writing glass 1.

[0078] In some cases, the display device needs to be provided with an optical film 10 to adjust the characteristics of the light emitted by the light bar 14 and improve the display effect. Therefore, as a further optimization, refer to Figure 2The fixing mechanism can include the pressing piece 8, the connecting piece 9, and the fixing cover 11. The fixing cover 11 can be detachably connected with the connecting piece 9. After the fixing cover 11 is connected with the connecting piece 9, the fixing cover 11 can be matched with the pressing piece 8 to press and fix the optical film 10. The upper side of the fixing cover 11 can be matched with the back plate 13. When the fixing cover 11 is connected with the connecting piece 9, and the back plate 13 is connected with the frame, the back plate 13 can press the fixing cover 11, thereby limiting the movement of the fixing cover 11 along the direction perpendicular to the writing glass 1.

[0079] In addition, as an example of the connection between the fixing cover 11 and the connecting piece 9, the connecting piece 9 can further be provided with an upper mounting plate 93 connected with the free end of the connecting piece 9, that is, the upper mounting plate 93 can be connected with the end of the connecting piece 9 away from the lower mounting plate 92, that is, the upper mounting plate 93 can be connected with the upper end of the connecting piece 9. The upper mounting plate 93 is provided with a plurality of upper mounting holes 95, and the fixing cover 11 is provided with connecting components matched with the upper mounting holes 95. The connecting components can be buckles. When the connecting components are buckles, the buckles on the fixing cover 11 can be buckled into the upper mounting holes, and the fixing cover 11 and the connecting piece 9 are connected in a clamping manner. In addition, the connecting components can also be bolts or pins, and the fixing cover 11 and the connecting piece 9 are connected in a threaded or pinned manner.

[0080] As a further optimization of the example, the lower mounting plate 92 is provided with lower mounting holes 96 at positions corresponding to the upper mounting holes 95 of the upper mounting plate 93, and the fixing cover 11 can include a fixing portion 111 and a second pressing portion 113. The lower side of the fixing portion 111 is connected with a pin 112 for matching with the upper mounting holes 95 and the lower mounting holes 96 to realize the connection between the fixing cover 11 and the connecting piece 9. The second pressing portion 113 can be arranged perpendicular to the writing glass 1, and is used to abut against the back plate 13, so that after the back plate 13 is connected to the frame, the optical film 10, the fixing mechanism, and the liquid crystal glass 3 are fixed through the cooperation between the back plate 13 and the second pressing portion 113.

[0081] In the following,

[0082] The embodiment also provides an integrated display device. Referring to Figure 3 Specifically, the display device includes a front frame assembly, a back plate 13, an electrical box 17, and components such as a light bar 14, a reflective film 15, an optical film 10, a top light column 16, etc. for realizing display in cooperation with the front frame assembly. The front frame assembly can be the front frame assembly provided by the embodiment. The back plate 13 is connected with the frame of the front frame assembly, and the back plate 13 can be matched with the fixing mechanism of the front frame assembly, so that the fixing mechanism can press and fix the liquid crystal glass 3 on the writing glass 1.

[0083] More specifically, see Figure 4 Components such as the light bar 14, reflective film 15, optical film 10, and top light column 16 are disposed within the cavity formed by the back panel 13 and the front frame assembly. The edge of the optical film 10 can be secured to a securing mechanism, with several securing mechanisms cooperating to secure the optical film 10 as a whole. The light bar 14 can be connected to the back panel 13, and the reflective film 15 can be provided with a plurality of lamp holes, the number, position, and size of which can correspond to the lamp beads on the light bar 14. The reflective film 15 can be secured to the back panel 13 via a plurality of top light columns 16, which can be located between the optical film 10 and the reflective film 15.

[0084] In addition, refer to Figure 5 To enhance the overall strength and stability of the integrated display device, several reinforcing ribs 12 may be provided on the back panel 13. The electrical box 17 may be connected directly to the back panel 13 or to the reinforcing ribs 12. A lower functional area assembly 18 may also be provided at the bottom of the frame. This lower functional area assembly 18 may include functional components such as a microphone, a loudspeaker, buttons, and a camera. The specific structure and connection methods of these functional components may be referenced to existing technologies or implemented in accordance with manufacturer recommendations, and will not be further described in this embodiment.

[0085] It should be noted that, referring to Figure 6 In this embodiment, the light bar 14, the reflective film 15, the top light column 16 and other components are arranged on the back panel 13. In fact, the light bar 14, the reflective film 15, the top light column 16 and the back panel 13 form a back panel module. After the fixing mechanism fixes the optical film, the front frame assembly and the optical film 10 form a writing display module. In this embodiment, the back panel module and the writing display module are directly assembled to complete the assembly of the integrated display device.

[0086] Specifically, the assembly method of the integrated display device is to first fix the writing glass 1 to the frame, then directly contact the liquid crystal glass 3 with the writing glass 1 and adsorb and fit them together, and finally use the back panel and the frame to cooperate with several fixing mechanisms set around the liquid crystal glass 3 to use the fixing mechanisms to press and fix the liquid crystal glass 3 on the writing glass 1.

[0087] More specifically, see Figure 7 , the assembly method of the integrated display device includes the following steps:

[0088] Step 1: Arrange the upper profile 4, the lower profile 5, the left profile 6, and the right profile 7 around the writing glass 1 and connect them to form a frame to fix the writing glass 1;

[0089] Step 2: Place the liquid crystal glass 3 on the writing glass 1 so that the back of the writing glass 1 is in direct contact with the front of the liquid crystal glass 3 and adheres to the writing glass 1. Then, connect several fixing mechanisms arranged around the liquid crystal glass to the frame. Through the cooperation of the several fixing mechanisms, the liquid crystal glass 3 is fixed to the writing glass. The edge of the optical film 10 is fixed to the fixing mechanisms.

[0090] Step 3: Connect the light bar 14 to the front of the back plate 13, and fix the reflective film 15 to the back plate 13 through a plurality of top light columns 16;

[0091] Step 4: Connect the back panel 13 to the frame. When the back panel 13 is connected to the frame, the back panel 13 can match with the fixing mechanism to assist the fixing mechanism to further fix the liquid crystal glass 3; then, connect the electrical box body 17 to the back of the back panel 13, and connect the lower functional area component 18 to the lower profile of the frame to complete the assembly of the integrated display device.

[0092] Therefore, the integrated display device of this embodiment, on the one hand, does not need to fill transparent media such as OCA optical glue, silicone, UV shadowless glue, etc. between the writing glass 1 and the liquid crystal glass 3, and no bubbles will be generated between the writing glass 1 and the liquid crystal glass 3, so that the bonding process of the writing glass 1 and the liquid crystal glass 3 is simple, thereby improving the assembly efficiency and product yield of the integrated display device; on the other hand, this embodiment directly adsorbs and bonds the liquid crystal glass 1 and the writing glass 1, instead of making the liquid crystal glass 3 and the light bar 14, the reflective film 15, the optical film 10, the sunshade and other components into a display module, which can greatly simplify the assembly process of the integrated display device, thereby improving the assembly efficiency.

[0093] In addition, it should be noted that the integrated display device of this embodiment abandons the display module composed of the screen and backlight assembly, and does not need to install components such as a light shield in the integrated display device. In this case, light leakage is likely to occur at the edge of the integrated display device.

[0094] To address the aforementioned issues, a light leakage prevention structure is provided near the four edges of the writing glass 1. This structure is formed from a light-shielding material attached to the writing glass 1, or from silk-screen ink printed on the writing glass. Of course, to minimize light leakage in the integrated display device of this embodiment, the light-shielding material can be made of a material with low light transmittance, or several layers of light-shielding material can be attached to the edges of the writing glass 1, for example, three, four, or more layers. When silk-screen printing is performed using ink, multiple layers of printing can be used, or a darker, denser printing method can be used.

[0095] the following,

[0096] Reference Figure 8This embodiment further provides a smart blackboard, which includes a display device and a writing board 20. The display device is an integrated display device in this embodiment, and the writing board 20 is connected to at least one of the left and right sides of the integrated display device.

[0097] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A front frame assembly comprising a frame, a liquid crystal glass, and a writing glass disposed on the frame, characterized in that: It also includes a plurality of fixing mechanisms, wherein the frame is arranged on the periphery of the writing glass, the liquid crystal glass is placed on the writing glass, the front surface of the liquid crystal glass is in direct contact with the back surface of the writing glass and is adsorbed and adhered to the writing glass, and the plurality of fixing mechanisms are arranged around the periphery of the liquid crystal glass, and the fixing mechanisms are used to fix the liquid crystal glass on the writing glass; The fixing mechanism includes a pressing piece, a connecting piece, and a fixing cover; the pressing piece is slidably connected to the connecting piece; the fixing cover is detachably connected to the connecting piece; The pressing member includes a pressing plate, a supporting portion and a first pressing portion; wherein the first pressing portion and the supporting portion are arranged on a side of the pressing plate close to the liquid crystal glass; The first pressing portion is arranged parallel to the liquid crystal glass and is used to press the liquid crystal glass tightly to press the liquid crystal glass onto the writing glass; The support portion is arranged perpendicular to the liquid crystal glass, and a support structure for placing the edge of the optical film is formed between the support portion and the first pressing portion; Slide grooves are provided on both sides of the pressing plate; The connecting piece includes a lower mounting plate, a connecting plate, and an upper mounting plate connected in sequence; the lower mounting plate is arranged parallel to the writing glass, and the connecting plate is arranged perpendicular to the writing glass; The edge of the lower mounting plate cooperates with the slide grooves provided on both sides of the pressing plate; The front end of the lower mounting plate is provided with two limiting parts, with a gap formed between the two limiting parts; the gap cooperates with the first pressing part, and the limiting part is used to limit the movement of the pressing plate in a direction parallel to the writing glass; The upper mounting plate is provided with a plurality of upper mounting holes, and the lower mounting plate is provided with lower mounting holes at positions corresponding to the upper mounting holes; The connecting plate is provided with connecting holes for matching with the fixing holes on the frame; The fixing cover includes a fixing part and a second pressing part. The lower side of the fixing part is connected with a pin, which is used to cooperate with the upper mounting hole and the lower mounting hole; the second pressing part is arranged perpendicular to the writing glass, and is used to press against the back plate.

2. The front frame assembly according to claim 1, characterized in that: An infrared touch module is provided on the frame, and the infrared touch module is used to form an infrared grid on the front surface of the writing glass to realize touch operation.

3. A front frame assembly according to claim 1 or 2, characterized in that: The back surface of the writing glass and the front surface of the liquid crystal glass are adhered to each other by vacuum adsorption or electrostatic adsorption.

4. The front frame assembly according to claim 1, characterized in that: A touch film is attached to the back of the writing glass. The back of the touch film replaces the back of the writing glass and directly contacts and adheres to the front of the liquid crystal glass.

5. The front frame assembly according to claim 4, characterized in that: The back surface of the touch film and the front surface of the liquid crystal glass are adhered to each other by vacuum adsorption or electrostatic adsorption.

6. The front frame assembly according to claim 4, characterized in that: The touch film component includes a touch film and an insulating film. The back surface of the insulating film is in direct contact with the front surface of the liquid crystal glass and is adsorbed and adhered thereto.

7. The front frame assembly according to claim 6, characterized in that: The back surface of the insulating film and the front surface of the liquid crystal glass are adhered to each other by vacuum adsorption or electrostatic adsorption.

8. The front frame assembly according to claim 1, 2, 4 or 6, characterized in that: The frame includes an upper profile, a lower profile, a left profile and a right profile, which are arranged around the writing glass and are connected by fasteners or by gluing.

9. The front frame assembly according to claim 8, characterized in that: Among the upper profile, lower profile, left profile and right profile, at least the upper profile and the lower profile are provided with fixing grooves, and the upper and lower edges of the writing glass are respectively clamped in the fixing grooves of the upper profile and the lower profile.

10. The front frame assembly according to claim 9, characterized in that: The fixing groove is arranged on the front side of the frame.

11. The front frame assembly according to claim 1, characterized in that: A rib is provided between the connecting plate and the lower mounting plate, and the rib is provided perpendicular to both the connecting plate and the lower mounting plate.

12. An integrated display device, characterized in that: It comprises a back panel and a front frame assembly as described in any one of claims 1 to 11, wherein the back panel is detachably connected to the frame, and the fixing mechanism of the front frame assembly is used to cooperate with the back panel so that the fixing mechanism can press and fix the liquid crystal glass on the writing glass.

13. The integrated display device according to claim 12, characterized in that: A light strip, an optical film and a reflective film are arranged in the cavity enclosed by the back panel and the front frame assembly. The light strip is connected to the back panel. A plurality of lamp holes are opened on the reflective film. The number, position and size of the lamp holes correspond to the lamp beads on the light strip. The reflective film is fixed to the back panel through a plurality of top light columns; the edge of the optical film is fixed to the fixing mechanism, and a plurality of the top light columns are located between the optical film and the reflective film.

14. The integrated display device according to claim 13, characterized in that: The writing glass is provided with a light leakage prevention structure near the four edges. The light leakage prevention structure is formed by a light shielding material attached to the writing glass, or formed by silk-screen ink on the writing glass.

15. The method for assembling an integrated display device according to any one of claims 12 to 14, characterized in that: First, the writing glass is fixedly connected to the frame, and then the liquid crystal glass is directly contacted with the writing glass and adsorbed and bonded to it, and the writing glass is fixed to the liquid crystal glass using a fixing mechanism to form a front frame assembly; The fixing mechanism includes a pressing piece, a connecting piece, and a fixing cover; the pressing piece is slidably connected to the connecting piece; the fixing cover is detachably connected to the connecting piece; The pressing member includes a pressing plate, a supporting portion and a first pressing portion; wherein the first pressing portion and the supporting portion are arranged on a side of the pressing plate close to the liquid crystal glass; The first pressing portion is arranged parallel to the liquid crystal glass and is used to press the liquid crystal glass tightly to press the liquid crystal glass onto the writing glass; The support portion is arranged perpendicular to the liquid crystal glass, and a support structure for placing the edge of the optical film is formed between the support portion and the first pressing portion; Slide grooves are provided on both sides of the pressing plate; The connecting piece includes a lower mounting plate, a connecting plate, and an upper mounting plate connected in sequence; the lower mounting plate is arranged parallel to the writing glass, and the connecting plate is arranged perpendicular to the writing glass; The edge of the lower mounting plate cooperates with the slide grooves provided on both sides of the pressing plate; The front end of the lower mounting plate is provided with two limiting parts, with a gap formed between the two limiting parts; the gap cooperates with the first pressing part, and the limiting part is used to limit the movement of the pressing plate in a direction parallel to the writing glass; The upper mounting plate is provided with a plurality of upper mounting holes, and the lower mounting plate is provided with lower mounting holes at positions corresponding to the upper mounting holes; The connecting plate is provided with connecting holes for matching with the fixing holes on the frame; The fixing cover includes a fixing portion and a second pressing portion. A pin is connected to the lower side of the fixing portion, and the pin is used to cooperate with the upper mounting hole and the lower mounting hole. The second pressing portion is arranged perpendicular to the writing glass and is used to press against the back plate. Finally, the front frame assembly is connected to the back panel assembly to assemble an integrated display device.

16. The assembly method according to claim 15, characterized in that: Specifically include the following steps: Step 1: Arrange the upper profile, lower profile, left profile, and right profile around the writing glass and connect them to form a frame to fix the writing glass; Step 2: Place the liquid crystal glass on the writing glass so that the back of the writing glass is in direct contact with the front of the liquid crystal glass and adheres to it by adsorption; then, connect a plurality of fixing mechanisms disposed around the liquid crystal glass to the frame, and through the cooperation of the plurality of fixing mechanisms, fix the liquid crystal glass to the writing glass; fix the edge of the optical film to the fixing mechanisms; Step 3: Connect the light strip to the front of the back panel and fix the reflective film to the back panel through several top light columns; Step 4: Connect the back panel to the frame, connect the electrical box to the back of the back panel, and connect the lower functional area component to the lower profile of the frame to complete the assembly of the integrated display device.

17. A smart blackboard, characterized by: The integrated display device according to claim 12 is provided, wherein a writing board is connected to at least one of the left and right sides of the integrated display device.

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