Ultrathin liquid crystal display module

Abstract

The invention discloses an ultrathin liquid crystal display module, a liquid crystal display panel, a backlight module, a side plate and a control mainboard, the liquid crystal display panel is surrounded and fixed by a panel enclosure frame assembly, the backlight module is surrounded and fixed by a backlight enclosure frame assembly, and a cof plate of the liquid crystal display panel is electrically connected with an adapter plate arranged on the peripheral wall of an enclosure plate. When the liquid crystal display panel provided with the surrounding plate is assembled, the liquid crystal display panel is tightly surrounded by the corner frame and the power connection cylinder extending out of the corner frame, and the expansion size of the peripheral panel surrounding frame assembly and the backlight surrounding frame assembly can be freely adjusted according to the size of the liquid crystal display panel. According to the liquid crystal display module, liquid crystal display panels of various sizes can be assembled without manufacturing a specific matched enclosure frame in a matched mode, and the production cost of the liquid crystal display module is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display, and in particular to an ultra-thin liquid crystal display module. Background Art

[0002] With the development of digital technology, liquid crystal display products have been widely used in all aspects of daily life, and the requirements for the fineness of liquid crystal display, the thinness and lightness of display panels, and the color display characteristics of the picture have gradually increased. The liquid crystal display module usually includes a liquid crystal display panel, a backlight module and a frame. The liquid crystal display panel is an important part of the liquid crystal display product. The electrical signal is applied to the liquid crystal panel to control whether the light passes through. The liquid crystal itself does not emit light, and the backlight module is required to provide light. The backlight module continuously provides light to the display screen to realize the picture display. The liquid crystal of the liquid crystal panel adjusts the light from the backlight module under the action of the electric field to display the image.

[0003] The patent with the publication number of CN100437252C discloses a liquid crystal display module, which includes a receiving frame, four light-emitting elements, a circuit board and a liquid crystal panel. The four light-emitting elements are arranged on the circuit board. The receiving frame includes a support frame, the support frame includes a support plate with a recessed portion and an anti-skid belt integrally formed with the support plate. The recessed portion includes four notches. The four light-emitting elements are located in the four notches. The circuit board is located in the recessed portion. The liquid crystal panel is arranged on the support frame corresponding to the anti-skid belt and is accommodated in the receiving space of the receiving frame. The use of the liquid crystal display module can prevent the anti-skid belt from being missed and the anti-skid belt from being poorly attached, and the cost is low. However, the outer frame size used by the device and most of the liquid crystal display modules used in the prior art is fixed. When assembling liquid crystal display panels and backlight modules of different sizes, it is necessary to re-open the mold to manufacture the outer frame matching the size, which greatly increases the production cost of the liquid crystal display module. For this reason, we propose an ultra-thin liquid crystal display module. Summary of the invention

[0004] In order to solve the problems mentioned in the above background technology, the present invention provides an ultra-thin liquid crystal display module.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An ultra-thin liquid crystal display module comprises a panel enclosure assembly, a backlight enclosure assembly and a bottom sealing plate, wherein the panel enclosure assembly is used to surround and fix a liquid crystal display panel, the backlight enclosure assembly is used to surround and fix a backlight module, and the bottom sealing plate is used to install a side plate and a control main board for controlling the operation of the liquid crystal display panel and the backlight module, the panel enclosure assembly comprises four corner frames and an electrical connection cylinder that connects the corner frames in pairs, the two ends of the electrical connection cylinder are respectively inserted into the hollow short cylinders of the corner frames on both sides, the electrical connection cylinder comprises a round plug cylinder, an electrical connection sheet and a transmission rod, the inside of the round plug cylinder is hollow and is provided with an electrical connection sheet, a side of the electrical connection sheet protruding from the round plug cylinder is provided with an electrical connection head, and the wires connected to the electrical connection head of each electrical connection sheet are collected in the transmission rod;

[0007] The backlight frame assembly includes four hollow frames and extension rods that connect the hollow frames in pairs. The extension rods include an outer rod, an inner rotating rod and a closed elastic ring. Both ends of the outer rod can be slidably inserted into the hollow frame and cannot escape from the hollow frame. There are multiple closed elastic rings and they are arranged on the outside of the outer rod. The outer rod is hollow inside to allow the inner rotating rod to pass axially therethrough.

[0008] Preferably, each terminal block is connected to a radial spring installed in the round plug-in tube, and the radial spring pushes the terminal block out of the round plug-in tube in a normal state.

[0009] Preferably, the COF plate of the LCD panel is electrically connected to the adapter plate arranged on the outer peripheral wall of the enclosure, and the LCD panel installed with the enclosure is tightly surrounded by the corner frame and the electrical connection tube protruding from the corner frame during assembly.

[0010] Preferably, the side of the corner frame facing the enclosure has a limiting groove that allows the enclosure to be placed in, and a transmission plate is installed on the inner side of the limiting groove. After the enclosure is placed in the limiting groove, the adapter plate provided on the surface of the enclosure can be electrically connected to the transmission plate, and the radial spring can push the power connection plate out to enable the power connection head to be electrically connected to the adapter plate.

[0011] Preferably, a plurality of transmission heads are arranged on the bottom plate of the inner cavity of the corner frame, and one end of the transmission rod passing through the round insert is connected to the lower rotating head. The lower rotating head corresponds to the transmission heads at different positions as the length of the round insert is pulled out. Two mating heads are arranged on the bottom plate of the outer side of the corner frame, one mating head is electrically connected to the transmission plate, and the other mating head is electrically connected to the transmission head.

[0012] Preferably, the closed elastic ring includes a fixed portion connected to the (outer) peripheral wall of the outer rod, and a rebound portion arranged on both sides of the fixed portion and capable of bending and merging into a circle around the outer rod. The rebound portion is made of elastic material and tends to straighten under normal circumstances to form a straight strip tangent to the outer rod. Two pull wires connecting the ends of the rebound portion of the closed elastic ring are arranged inside the inner rotating rod.

[0013] Preferably, the inner rotating rod extends out of both ends of the outer rod until passing through the outer wall of the hollow frame, and the end of the inner rotating rod is provided with a rotating screw head, and the end of the pull wire is wound around the inner rotating rod.

[0014] Preferably, a U-shaped arc plate that can freely slide in and out of the corner frame is provided in the corner frame, and at least one reinforcement column is fixedly provided in the rebound part of the closed elastic ring. The reinforcement column includes a transverse column, a locking plug, a linkage rope and a rebound member. The two ends of the transverse column are respectively provided with a setting groove and a locking groove. The locking plug and the rebound member are arranged in the setting groove. Under normal circumstances, the rebound member pushes the locking plug part out of the setting groove, thereby placing the locking plug part in the locking groove of the reinforcement column provided with the adjacent closed elastic ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention can arbitrarily adjust the extended size of the peripheral panel frame assembly and the backlight frame assembly according to the size of the liquid crystal display panel, and can assemble liquid crystal display panels of various sizes without adapting and manufacturing specific matching frames, thereby greatly reducing the production cost of the liquid crystal display module.

[0017] 2. The present invention can well ensure the stability and sealing of the module after assembly while adjusting the size at will, so that the assembled module can have stability and sealing of the assembled module with fixed size. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of an ultra-thin liquid crystal display module according to the present invention;

[0020] Figure 2 This is a schematic diagram of the backlight module structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the independent structure of the liquid crystal display panel and the external enclosure according to the present invention;

[0022] Figure 4 It is a schematic structural diagram of the panel frame assembly of the present invention at one viewing angle;

[0023] Figure 5 It is a structural schematic diagram of the panel frame assembly of the present invention from another observation angle;

[0024] Figure 6 It is a cross-sectional schematic diagram of the round insert cylinder of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of part of the extension rod of the present invention at one observation angle;

[0026] Figure 8 It is a schematic diagram of the structure of the extension rod of the present invention from another observation angle;

[0027] Fig. 9 It is a schematic cross-sectional view of the rebound portion of the closed elastic ring of the present invention;

[0028] Fig.10 This is a schematic diagram of the reinforcement column structure described in the present invention.

[0029] In the figure: 1. Panel enclosure assembly; 101. Limiting groove; 11. Corner frame; 12. Electrical connection tube; 121. Round plug tube; 122. Electrical connection sheet; 123. Transmission rod; 124. Electrical connection head; 125. Radial spring; 126. Lower rotating head; 13. Enclosure; 14. Adapter plate; 15. Transmission plate; 16. Transmission head; 17. Matching head; 18. U-shaped arc plate; 2. Backlight enclosure assembly; 201. Setting groove; 202. Locking groove; 21. Hollow enclosure; 22. Extension rod; 221. Outer rod; 222. Inner rotating rod; 223 , closed elastic ring; 224, with a rotating screw head; 225, pull wire; 226, reinforcement column; 2261, horizontal column; 2262, locking plug; 2263, linkage rope; 2264, rebound part; 2265, buffer head; 3, bottom sealing plate; 400, COF plate; 500, LCD panel; 600, backlight module; 601, optical film; 602, light guide plate; 603, reflective sheet; 604, shading tape; 605, frame; 606, circuit board; 607, light-emitting diode; 700, side panel; 800, control main board. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] Reference Figure 1-10An ultra-thin liquid crystal display module includes a panel frame assembly 1, a backlight frame assembly 2 and a bottom sealing plate 3, wherein the panel frame assembly 1 is used to surround and fix a liquid crystal display panel 500, the backlight frame assembly 2 is used to surround and fix a backlight module 600, and the bottom sealing plate 3 is used to install a side panel 700 and a control main board 800 for controlling the operation of the liquid crystal display panel 500 and the backlight module 600.

[0033] The panel frame assembly 1 includes four corner frames 11 and electrical connection tubes 12 that connect the corner frames 11 in pairs. The corner frames 11 have two hollow short tubes arranged at right angles to each other. The two ends of the electrical connection tube 12 are respectively inserted into the hollow short tubes of the corner frames 11 on both sides. The corner frames 11 on both sides of the electrical connection tube 12 can move toward or away from each other to adjust the distance between each other, so that they can surround spaces of different sizes to smoothly accommodate liquid crystal display panels 500 of different sizes. As the distance between the corner frames 11 is adjusted, the electrical connection tube 12 will also be exposed at different lengths between the corner frames 11.

[0034] The electrical connection tube 12 comprises a round plug tube 121, a power connection piece 122 and a transmission rod 123. The end of the hollow short tube of the corner frame 11 has a socket allowing the round plug tube 121 equipped with the power connection piece 122 to be inserted. The end of the round plug tube 121 has a limit plate with a diameter larger than the socket of the corner frame 11 to prevent the corner frame 11 from being separated from the round plug tube 121. The inside of the round plug tube 121 is hollow, and a transverse window is provided on the circumferential wall of the round plug tube 121 to allow the power connection piece 122 to protrude from the inside of the round plug tube 121. The transmission rod 123 penetrates from the center of the axis of the round plug tube 121 and protrudes from both ends of the round plug tube 121. A power connection head 124 is installed on the side of the power connection piece 122 protruding from the round plug tube 121. A plurality of power connection pieces 122 are densely arranged, and the wires connected to the power connection head 124 of each power connection piece 122 are collected in the transmission rod 123.

[0035] Each of the power connection pieces 122 is connected to a radial spring 125 installed in the round insert tube 121. The radial spring 125 pushes the power connection piece 122 out of the round insert tube 121 under normal conditions. When the panel frame assembly 1 is not in use but is stored, the user can press the power connection piece 122 into the round insert tube 121 and store the power connection tube 12 as a whole into the corner frame 11 to reduce the occupied storage volume. When assembled and used, the round insert tube 121 is pulled out of the corner frame 11 and pops outward, so that the power connection head 124 can be matched, connected and maintained with the external related structure.

[0036] The COF plate 400 of the liquid crystal display panel 500 is electrically connected to the adapter plate 14 provided on the outer peripheral wall of the enclosure 13. The liquid crystal display panel 500 with the enclosure 13 installed is tightly surrounded by the corner frame 11 and the electrical connection tube 12 protruding from the corner frame 11 during assembly. The corner frame 11 has a limiting groove 101 on the side facing the enclosure 13 to allow the enclosure 13 to be placed. A transmission plate 15 is installed inside the limiting groove 101. After the enclosure 13 is placed in the limiting groove 101, the adapter plate 14 provided on the surface of the enclosure 13 can be electrically connected to the transmission plate 15. The radial spring 125 can push the power connection sheet 122 out to make the power connection head 124 To be electrically connected with the adapter plate 14, a plurality of transmission heads 16 are arranged on the bottom plate of the inner cavity of the corner frame 11. The end of the transmission rod 123 passing through the round plug-in tube 121 is connected to the lower rotating head 126. The lower rotating head 126 corresponds to the transmission heads 16 at different positions as the length of the round plug-in tube 121 is pulled out. It can be understood that the circuit chip installed on the transmission head 16 is held in a position away from the lower rotating head 126 by the connected screws and other accessories before assembly. After the corner frame 11 and the electrical connection tube 12 are assembled, the user can pull the transmission head 16 to the lower rotating head 126 with the help of the connected screws and other accessories, so that the two can be electrically connected with each other.

[0037] The outer bottom plate of the corner frame 11 is provided with two mating heads 17, one of the mating heads 17 is electrically connected to the transmission board 15, and the other mating head 17 is electrically connected to the transmission head 16. In this way, after receiving the electrical signal input from the side board 700 and the control main board 800, the mating head 17 can transmit the signal to the electrically connected connecting head 124 and the transmission board 15, thereby finally transmitting the display signal to the adapter board 14 and then to the liquid crystal display panel 500.

[0038] Example 2

[0039] Reference Figure 1-10 The difference between this embodiment and embodiment 1 is that the backlight frame assembly 2 includes four hollow frames 21 and extension rods 22 that connect the hollow frames 21 in pairs. The four corners of the hollow frames 21 are tightly spliced ​​up and down by screw positioning connection. The upper surface of the hollow frame 21 and the lower surface of the corner frame 11 are respectively provided with sealing strips and sealing grooves at corresponding positions. When the hollow frame 21 and the corner frame 11 are connected up and down, the sealing strips can be inserted into the sealing grooves, thereby further ensuring the sealing after the module is assembled.

[0040] The hollow frames 21 can move toward or away from each other to adjust the distance between each other, so that they can surround spaces of different sizes to smoothly accommodate backlight modules 600 of different sizes. After the backlight module 600 is installed in the backlight frame assembly 2, the bottom sealing plate 3 installed with the side panels 700 and the control main board 800 will be installed at the bottom of the backlight frame assembly 2. After the bottom sealing plate 3 is installed, the side panels 700 can be electrically connected to the mating heads 17 installed on the corner frames 11 installed in the hollow frame 21, so as to transmit the display signal to the mating heads 17. After installation, the control main board 800 can be electrically connected to the backlight module 600, so as to control the operation of the backlight module 600.

[0041] The backlight module 600 includes an optical film 601, a light guide plate 602, a reflective sheet 603, a light-shielding tape 604, a frame 605 and a circuit board 606. The optical film 601, the light guide plate 602 and the reflective sheet 603 are stacked in sequence and accommodated in the frame 605. The light guide plate 602 includes a light incident surface, a light emitting surface adjacent to the light incident surface, a bottom surface opposite to the light emitting surface and two opposite side surfaces adjacent to the light incident surface. The frame 605 accommodates the stacked optical film 601, the light guide plate 602 and the reflective sheet 603. The circuit board 606 is arranged adjacent to the light incident surface of the light guide plate 602. 01 is arranged on the light emitting surface of the adjacent light guide plate 602, the reflective sheet 603 is arranged on the bottom surface of the adjacent light guide plate 602, the shading tape 604 is attached to the adjacent part of the optical film 601 and the frame 605, so as to fix the optical film 601 and cover the light emitting area at the edge of the light guide plate 602, and reflect part of the edge light back to the light guide plate 602, the light emitted from the light emitting diode 607 enters the light guide plate 602 through the light incident surface, part of the light is emitted from the light emitting surface toward the optical film 601, part of the light is emitted from the bottom surface to the reflective sheet 603, and is reflected by the reflective sheet 603 and re-enters the light guide plate 602, and finally emitted from the light emitting surface toward the optical film 601.

[0042] The extension rod 22 includes an outer rod 221, an inner rotating rod 222 and a closed elastic ring 223. The two ends of the outer rod 221 can be slidably inserted into the hollow frame 21 and cannot be removed from the hollow frame 21. The closed elastic ring 223 is provided in plurality and arranged in an array outside the outer rod 221. The outer rod 221 is hollow inside to allow the inner rotating rod 222 to axially penetrate therein. The inner rotating rod 222 extends out of the two ends of the outer rod 221 until it passes through the outer wall of the hollow frame 21. The end of the inner rotating rod 222 is provided with a rotating screw head 224, so that the user can use a tool such as a screwdriver to drive the rotating screw head 224 to axially rotate so that the inner rotating rod 222 linked thereto rotates in the outer rod 221.

[0043] The closed elastic ring 223 includes a fixed portion connected to the outer peripheral wall of the outer rod 221, and a rebound portion arranged on both sides of the fixed portion and capable of bending and merging to form a circle around the outer rod 221. The rebound portion is made of elastic material and tends to be stretched straight to form a straight strip tangent to the outer rod 221 under normal circumstances. Two pull wires 225 connected to the ends of the rebound portion of the closed elastic ring 223 are arranged inside the inner rotating rod 222. The user can synchronously release the pull wires 225 by driving the inner rotating rod 222 to rotate. Or rolling up, the corner frame 11 is also provided with a U-shaped arc plate 18 which can freely slide in and out of the corner frame 11, and the rebound portion of the closed elastic ring 223 can just fit tightly against the bottom of the U-shaped arc plate 18 when the closed elastic ring 223 is unfolded, and the extension rod 22 can smoothly move in or out of the hollow frame 21 when the closed elastic ring 223 surrounds the outer rod 221, and the closed elastic ring 223 can be combined into a closing device to close the gap between the hollow frames 21 when it is unfolded, so as to ensure the sealing after the module is assembled.

[0044] At least one reinforcement column 226 is fixedly arranged in the rebound part of the closed elastic ring 223, and the reinforcement column 226 includes a transverse column 2261, a locking plug 2262, a linkage rope 2263 and a rebound member 2264. The two ends of the transverse column 2261 respectively have a setting groove 201 and a locking groove 202. The locking plug 2262 and the rebound member 2264 are arranged in the setting groove 201. Under normal circumstances, the rebound member 2264 pushes part of the locking plug 2262 out of the setting groove 201, so that the locking plug 2262 is partially inserted into the locking groove 202 of the reinforcement column 226 arranged in the adjacent closed elastic ring 223. When the reinforcement columns 226 of each closed elastic ring 223 are connected end to end in sequence, they can be connected into a reinforced straight rod, thereby enhancing the structural strength of the elastic and soft closed elastic ring 223 when it is unfolded.

[0045] One end of the linkage rope 2263 is connected to the locking plug 2262, and the other end is connected to the pull wire 225. The end of the rebound part of the closed elastic ring 223 is provided with a buffer head 2265. The linkage rope 2263 and the end of the pull wire 225 are connected in the inner cavity of the buffer head 2265. The inner cavity of the buffer head 2265 has a space allowing the pull wire 225 to pull out part of the linkage rope 2263, and the end of the pull wire 225 cannot be separated from the inner cavity of the buffer head 2265. When it is necessary to rewind the rebound part of the closed elastic ring 223, the retracted pull wire 225 first pulls the linkage rope 2263 outward and pulls the locking plug 2262 back to the setting groove 201 to disengage from the originally inserted locking groove 202, so that the rebound part can be smoothly bent, and then the retracted pull wire 225 can continue to pull back and bend the rebound part of the closed elastic ring 223 equipped with the buffer head 2265, until the entire expansion rod 22 can be smoothly retracted into the hollow frame 21.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultra-thin liquid crystal display module, comprising a liquid crystal display panel (500), a backlight module (600), a side panel (700) and a control main board (800), characterized in that: The liquid crystal display panel (500) is surrounded and fixed by the panel frame assembly (1), the backlight module (600) is surrounded and fixed by the backlight frame assembly (2), the COF plate (400) of the liquid crystal display panel (500) is electrically connected to the adapter plate (14) arranged on the outer peripheral wall of the enclosure (13), and the liquid crystal display panel (500) installed with the enclosure (13) is tightly surrounded by the corner frame (11) and the electrical connection tube (12) protruding from the corner frame (11) during assembly; The backlight module (600) comprises an optical film (601), a light guide plate (602), a reflective sheet (603), a light shielding tape (604), a frame (605) and a circuit board (606); the optical film (601), the light guide plate (602) and the reflective sheet (603) are stacked in sequence and accommodated in the frame (605); the light guide plate (602) has a light incident surface and a light emitting surface adjacent to the light incident surface. , a bottom surface opposite to the light emitting surface and two opposite side surfaces adjacent to the light incident surface, the frame (605) accommodates the stacked optical film (601), the light guide plate (602) and the reflective sheet (603), the circuit board 606 is arranged adjacent to the light incident surface of the light guide plate (602), the optical film (601) is arranged adjacent to the light emitting surface of the light guide plate (602), and the reflective sheet (603) is arranged adjacent to the bottom surface of the light guide plate (602).

2. The ultra-thin liquid crystal display module according to claim 1, characterized in that: The light-shielding tape (604) is attached to the adjacent portion of the optical film (601) and the frame (605) to fix the optical film (601) and cover the light-emitting area at the edge of the light guide plate (602), and reflect part of the edge light back to the light guide plate (602); light emitted from the light-emitting diode (607) enters the light guide plate (602) through the light incident surface, part of the light is emitted from the light emitting surface toward the optical film (601), and part of the light is emitted from the bottom surface to the reflective sheet (603), and is reflected by the reflective sheet (603) and re-enters the light guide plate (602), and finally emitted from the light emitting surface toward the optical film (601).

3. The ultra-thin liquid crystal display module according to claim 1, characterized in that: The panel enclosure assembly (1) comprises four corner frames (11) and power connection tubes (12) for correspondingly connecting the corner frames (11) in pairs. The two ends of the power connection tubes (12) are respectively inserted into the hollow short tubes of the corner frames (11) on both sides. The power connection tubes (12) comprise a round plug tube (121), a power connection sheet (122) and a transmission rod (123). The round plug tube (121) is hollow inside and is provided with a power connection sheet (122). A power connection head (124) is installed on one side of the power connection sheet (122) protruding from the round plug tube (121). The wires connected to the power connection head (124) of each power connection sheet (122) are The backlight frame assembly (2) includes four hollow frames (21) and an extension rod (22) for correspondingly connecting the hollow frames (21) in pairs. The extension rod (22) includes an outer rod (221), an inner rotating rod (222) and a closed elastic ring (223). Both ends of the outer rod (221) can be slidably inserted into the hollow frame (21) and cannot be removed from the hollow frame (21). A plurality of closed elastic rings (223) are arranged and arranged outside the outer rod (221). The outer rod (221) is hollow inside to allow the inner rotating rod (222) to axially penetrate therein.

4. The ultra-thin liquid crystal display module according to claim 3, characterized in that: Each of the power connection pieces (122) is connected to a radial spring (125) installed in the round plug-in cylinder (121). The radial spring (125) pushes the power connection piece (122) out of the round plug-in cylinder (121) in a normal state.

5. The ultra-thin liquid crystal display module according to claim 4, characterized in that: The corner frame (11) has a limiting groove (101) on one side facing the enclosure (13) for allowing the enclosure (13) to be placed therein, and a transmission plate (15) is installed inside the limiting groove (101). After the enclosure (13) is placed in the limiting groove (101), an adapter plate (14) provided on the surface of the enclosure (13) can be electrically connected to the transmission plate (15), and the radial spring (125) can push out the power connection sheet (122) so that the power connection head (124) can be electrically connected to the adapter plate (14).

6. The ultra-thin liquid crystal display module according to claim 5, characterized in that: A plurality of transmission heads (16) are arranged on the bottom plate of the inner cavity of the corner frame (11); one end of the transmission rod (123) passing through the round insert (121) is connected to a lower rotating head (126); the lower rotating head (126) corresponds to transmission heads (16) at different positions as the length of the round insert (121) is pulled out. Two matching heads (17) are arranged on the bottom plate outside the corner frame (11); one matching head (17) is electrically connected to the transmission plate (15), and the other matching head (17) is electrically connected to the transmission head (16).

7. The ultra-thin liquid crystal display module according to claim 6, characterized in that: The closed elastic ring (223) comprises a fixed portion connected to the outer peripheral wall of the outer sleeve rod (221), and a rebound portion arranged on both sides of the fixed portion and capable of bending and merging to form a circle around the outer sleeve rod (221). The rebound portion is made of elastic material and tends to be stretched straight to form a straight strip tangent to the outer sleeve rod (221) under normal circumstances. Two pull wires (225) connected to the ends of the rebound portion of the closed elastic ring (223) are arranged inside the inner rotating rod (222).

8. The ultra-thin liquid crystal display module according to claim 3, characterized in that: The inner rotating rod (222) extends out of both ends of the outer rod (221) until passing through the outer wall of the hollow surrounding frame (21), and the end of the inner rotating rod (222) is provided with a rotating screw head (224), and the end of the pulling wire (225) is wound around the inner rotating rod (222).

9. The ultra-thin liquid crystal display module according to claim 8, characterized in that: A U-shaped arc plate (18) capable of freely sliding in and out of the corner frame (11) is arranged in the corner frame (11); at least one reinforcing column (226) is fixedly arranged in the rebound portion of the closed elastic ring (223); the reinforcing column (226) comprises a transverse column (2261), a locking plug (2262), a linkage rope (2263) and a rebound member (2264); two ends of the transverse column (2261 respectively have a setting groove (201) and a locking groove (202); the locking plug (2262) and the rebound member 2264 are arranged in the setting groove (201); under normal circumstances, the rebound member (2264) partially pushes the locking plug 2262 out of the setting groove (201), thereby partially placing the locking plug (2262) in the locking groove (202) of the reinforcing column (226) arranged in the adjacent closed elastic ring (223).

10. The ultra-thin liquid crystal display module according to claim 9, characterized in that: One end of the linkage rope (2263) is connected to the locking plug (2262), and the other end is connected to the pull wire (225). The end of the rebound part of the closed elastic ring (223) is provided with a buffer head (2265). The linkage rope (2263) and the end of the pull wire (225) are connected in the inner cavity of the buffer head (2265). The inner cavity of the buffer head (2265) has a space that allows the pull wire (225) to pull out part of the linkage rope (2263), and the end of the pull wire (225) cannot be separated from the inner cavity of the buffer head (2265).

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