Protruding structure for supporting end corner of back plate of curved screen

Abstract

The utility model relates to a curved screen backboard end corner supporting protrusion structure which is characterized in that the curved screen backboard end corner supporting protrusion structure comprises a curved-surface-shaped metal backboard, a plurality of reinforcing ribs are arranged on the metal backboard, two lower end corners of the metal backboard are provided with protrusion portions facing the inner side of a curved surface, and the protrusion portions are used for supporting corner portions of a light guide membrane in a liquid crystal display. The protruding height of the protruding part is consistent with the protruding height of the reinforcing rib. The curved screen backboard end corner supporting protrusion is reasonable in structural design, and the problem that a liquid crystal curved screen has a dark area is solved.

Description

Technical fields:

[0001] This utility model relates to a corner support protrusion structure for the back panel of a curved screen. Background technology:

[0002] With the increasing production and use of curved LCD screens, it has been observed that dark areas (hereinafter referred to as "dark areas") tend to appear at the lower left and right corners of the curved LCD screen. Research has revealed that this is due to the different spacing between the light guide film and the light guide plate attached to the back panel of the curved LCD screen in the dark area compared to other areas. This results in a lower light intensity in the dark area compared to other areas, thus creating the dark area.

[0003] Currently, a Chinese patent, "A Positioning Device, Backlight Module, and Liquid Crystal Display Device," with publication number CN102913862A, has been found. This positioning device for the backlight module achieves linkage between the light guide plate and the reflective sheet, which can reduce the impact of assembling the light guide plate on the position of the reflective sheet; it can accurately position the reflective sheet during assembly, providing ample space for the expansion of the reflective sheet and improving the optical uniformity of the backlight module; however, this device cannot solve the problem of dark corners on curved LCD screens.

[0004] In addition, studs are installed on the upper part of the curved screen back panel. These studs are used to fix the back plastic shell of the LCD curved screen by screwing them together. Currently, welding, riveting, or bolting are commonly used to install these studs. Welding or bolting requires more processing steps and has low production efficiency, so riveting has become the preferred method. However, the riveting surface between the stud and the metal back panel is currently located on the outer curved surface of the curved screen back panel, which can easily lead to problems with weak anchoring. Summary of the Invention:

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to propose a curved screen back panel corner support protrusion structure. The curved screen back panel corner support protrusion structure is reasonably designed and helps to overcome the problem of dark areas appearing on the LCD curved screen.

[0006] This utility model is implemented using the following solution.

[0007] The present invention relates to a curved screen back panel corner support protrusion structure, characterized in that: it includes a curved metal back panel with multiple reinforcing ribs, and two lower corners of the metal back panel are provided with protrusions facing the inner side of the curved surface. The protrusions are used to support the corners of the light guide film in the liquid crystal display, and the protrusion height of the protrusions is consistent with that of the reinforcing ribs.

[0008] Preferably, the protrusion is in the shape of a right triangle, with the two right-angled sides of the protrusion located on the side and bottom of the metal back plate, respectively.

[0009] Preferably, the protrusion height of the protrusion and the reinforcing rib is 3-7mm.

[0010] Preferably, the length of the two right-angled sides of the protrusion is 1-5 cm.

[0011] Preferably, the aforementioned reinforcing ribs include an outer annular reinforcing rib and a plurality of strip-shaped reinforcing ribs arranged along the length direction of the metal back plate, surrounding the inner side of the outer annular reinforcing rib.

[0012] Preferably, the outer annular reinforcing ribs and the four sides of the metal back plate are spaced apart, and the protrusions are disposed in the spaced apart and located at the lower corner of the metal back plate.

[0013] Preferably, the upper part of the metal back plate is provided with a stud for locking screws of external parts. The first end of the stud has an opening and an internal thread on the opening. The second end of the stud has a closing plate larger than the diameter of the stud. The outer periphery of the closing plate has serrations. The closing plate is riveted into the groove of the countersunk hole in the upper part of the metal back plate. The countersunk hole is located on one side of the inner curved surface of the metal back plate.

[0014] Preferably, the first end of the stud protrudes from the outer curved surface of the metal backing plate.

[0015] Preferably, a stepped ring is provided on the outer periphery of the opening at the first end of the stud.

[0016] Because of the protrusion, this invention can support the corner of the light guide film, allowing the lower corner of the light guide film in the curved LCD screen using the metal backplate to fit snugly with the corner of the light guide plate, avoiding large gaps between them and preventing the formation of dark areas. Attached image description:

[0017] The present invention will be further described below with reference to the accompanying drawings;

[0018] Figure 1 It is a three-dimensional view of the metal back panel from one perspective;

[0019] Figure 2 This is a three-dimensional view of the metal back panel from another perspective;

[0020] Figure 3 This is a partial cross-sectional view of the metal backplate;

[0021] Figure 4 This is a partial view of the metal back panel;

[0022] Figure 5 This is a cross-sectional structural diagram of the mold used in this application;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of a counterexample of a mold. Detailed implementation method:

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] The present invention relates to a curved screen back panel corner support protrusion structure, which includes a curved metal back panel 1, a plurality of reinforcing ribs 2 on the metal back panel 1, and two protrusions 3 facing the inner side of the curved surface at the two lower corners of the metal back panel. The protrusions 3 are used to support the corners of the light guide film in the liquid crystal display, and the protrusion height of the protrusions 3 is consistent with that of the reinforcing ribs 2.

[0026] Because of the protrusion 3, the corner of the light guide film can be supported, so that the lower corner of the light guide film and the corner of the light guide plate in the LCD curved screen using the metal back plate 1 can fit together, avoiding large gaps between them and avoiding the problem of dark areas.

[0027] The reason for the large gap between the light guide film and the corner of the light guide plate is that during the time between the production and consumer use of the LCD curved screen, it is usually flat during transportation and storage. Under the action of gravity, a gap is generated between the corner of the light guide film and the corner of the light guide plate, resulting in dark areas.

[0028] The reason why the protrusions 3 are only provided at the two lower corners of the metal back plate is that the dark area does not appear at the upper corner of the LCD curved screen. Since the upper edge of the LCD curved screen is provided with a light strip module (the light strip module is located between the upper edge of the LCD curved screen and the upper part of the outer ring reinforcing rib 201), the light strip module plays a supporting role.

[0029] Preferably, the protrusion can be a right triangle, with the two right-angled sides of the protrusion located on the side 101 and bottom 102 of the metal back plate, respectively (the length of the two right-angled sides of the protrusion is 1-5 cm); or the protrusion can be a fan shape, with the two sides of the fan being the side and bottom of the metal back plate (the length of the two right-angled sides of the protrusion is 1-5 cm); or the protrusion can be a circle, rectangle, or ring, etc., and the circular, rectangular, or ring-shaped protrusion can be connected to or not connected to the side or bottom of the metal back plate.

[0030] The protrusion height of the raised part and the reinforcing rib can be 3-7mm.

[0031] The specific reinforcing rib 2 includes an outer annular reinforcing rib 201 and several strip-shaped reinforcing ribs 202 arranged along the length of the metal back plate and surrounding the inner side of the outer annular reinforcing rib. There are intervals between the strip-shaped reinforcing ribs 202 and between the strip-shaped reinforcing ribs 202. The outer annular reinforcing rib 201 and the strip-shaped reinforcing ribs 202 can be of equal or unequal width. By setting the outer annular reinforcing rib 201 and several strip-shaped reinforcing ribs 202, the overall shape stability of the metal back plate 1 can be enhanced.

[0032] The outer annular reinforcing rib 201 has a spacer band 106 between it and the four sides of the metal back plate. The protrusion is disposed in the spacer band and located at the lower corner of the metal back plate.

[0033] A stud 4 for locking screws to external components (such as the plastic shell on the back of a curved LCD screen) is provided on the upper part of the metal back plate 1. The first end of the stud 4 has an opening and an internal thread 401. During installation, a screw is inserted into the countersunk hole of the external component and connected to the internal thread 401. The second end of the stud has a closing plate 402 larger than the diameter of the stud. The closing plate 402 can be circular, rectangular, or elliptical, but is preferably circular. The outer periphery of the closing plate has serrations 403 (the serrations 403 are located at the countersunk hole 10). After the groove of 3 is riveted, it has better torque resistance. The sealing piece 402 is riveted in the groove of the groove hole 103 on the upper part of the metal back plate. The groove of the groove hole 103 is located on the inner curved surface of the metal back plate 1. Since the sealing piece 402 is riveted in the groove of the groove hole 103 on the upper part of the metal back plate, and the outer periphery of the sealing piece is provided with serrations 403, the connection between the stud 4 and the metal back plate 1 can be more stable and reliable, and it is not easy for the stud 4 to fall off the outer curved surface of the metal back plate 1.

[0034] For ease of use and strong screw fastening force, the first end of the stud 4 protrudes from the outer curved surface 104 of the metal back plate (allowing for a longer screw connection length with the screw), and a stepped ring 404 is provided around the opening at the first end of the stud (this stepped ring allows for a longer screw connection length with the screw and better contact with the plastic shell on the back of the LCD curved screen).

[0035] This utility model relates to a mold for stamping curved screen back panels, comprising an upper mold A1 and a lower mold A2 for stamping to form a curved metal back panel. The upper surface of the lower mold A2 is concave arc-shaped to form the outer curved surface 104 of the metal back panel, and the lower surface of the upper mold A1 is convex arc-shaped to form the inner curved surface 105 of the metal back panel. The upper surface of the lower mold is provided with a groove A3 for the first end of a stud 4 to extend into, and the lower surface of the upper mold is provided with a protrusion A4 for riveting the second end of the stud into the upper recessed hole of the metal back panel.

[0036] The above-described mold structure facilitates the stamping formation of curved metal back plates. Furthermore, since the lower surface of the upper mold A1 is convex and the upper surface of the lower mold A2 is concave, the first end of the stud 4 can be inserted downward into the groove A3 on the upper surface of the lower mold during the stamping process. This allows the closing piece 402 of the stud 4 to be riveted into the groove of the countersunk hole 103 in the metal back plate, which helps ensure the reliability of the stud 4 riveting.

[0037] Furthermore, if the upper mold and lower mold are designed in opposite ways (e.g.) Figure 6 As shown in the diagram, the lower surface of the upper die is concave, and the upper surface of the lower die is convex. Therefore, to secure the stud 4 to the outer curved surface 104 of the metal backing plate, the stud 4 and the outer curved surface of the metal backing plate can only be directly riveted, resulting in an unstable connection. To adapt to this upper and lower die design and to avoid the problem of an unstable connection between the stud 4 and the outer curved surface of the metal backing plate, the stud 4 can be riveted into the countersunk hole 103 of the metal backing plate. Specifically, the first end of the stud 4 faces upward and passes through the inner curved surface 105 of the metal backing plate to the outer curved surface 104 before riveting. During the stamping process, this ensures a more secure connection. First, a stud needs to be placed in the recess of the lower die (this recess is equivalent to pre-positioning the stud, but since the stud needs to be riveted to the metal back plate, the contact area between the stud and the recess is small or even non-existent). Then, the metal back plate is placed on top. During placement, the countersunk hole on the metal back plate needs to be aligned with the stud. Because the contact area between the stud and the recess is small, the stud is prone to deviation, which makes it inconvenient to place the metal back plate, thus affecting processing efficiency and assembly line operation. Even if the stud 4 is inserted into the recess hole 103 from bottom to top and then placed into the die, this operation will cause the stud 4 to fall due to its own weight, making it impossible to perform the stamping action.

[0038] Using the mold design of this application (the upper surface of the lower mold A2 is concave arc-shaped, the lower surface of the upper mold A1 is convex arc-shaped, the upper surface of the lower mold is provided with a groove A3 for the first end of the stud 4 to extend into, and the lower surface of the upper mold is provided with a protrusion A4 for riveting the second end of the stud into the upper recessed hole of the metal backing plate), during use, the metal backing plate to be stamped can be placed on the lower mold first, and then the first end of the stud 4 can be passed through the recessed hole 103 from the inner curved surface to the outer curved surface and extended into the groove A3 of the lower mold, so that the stud 4 can be installed conveniently, quickly, accurately, and with high stability.

[0039] Similarly, the upper surface of the lower mold is provided with a boss for forming a protrusion of the metal back plate, and the lower surface of the upper mold is provided with a recess for forming a protrusion of the metal back plate.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A curved screen back panel end corner support protrusion structure, characterized in that: The device includes a curved metal back plate with multiple reinforcing ribs. The two lower corners of the metal back plate have protrusions facing the inside of the curved surface. These protrusions are used to support the corners of the light guide film in the liquid crystal display. The protrusions are at the same height as the reinforcing ribs.

2. The curved screen back panel corner support protrusion structure according to claim 1, characterized in that: The protrusion is shaped like a right triangle, with the two right-angled sides of the protrusion located on the side and bottom of the metal back plate, respectively.

3. The curved screen back panel corner support protrusion structure according to claim 1 or 2, characterized in that: The protrusion height of the protrusion and the reinforcing rib is 3-7mm.

4. The curved screen back panel corner support protrusion structure according to claim 3, characterized in that: The length of the two right-angled sides of the protrusion is 1-5 cm.

5. The curved screen back panel end corner support protrusion structure according to claim 4, characterized in that: The reinforcing ribs include an outer annular reinforcing rib and several strip-shaped reinforcing ribs arranged along the length of the metal back plate, surrounding the inner side of the outer annular reinforcing rib.

6. The curved screen back panel corner support protrusion structure according to claim 5, characterized in that: The outer annular reinforcing ribs are spaced apart from the four sides of the metal back plate, and the protrusions are disposed in the spacers and located at the lower corner of the metal back plate.

7. The curved screen back panel corner support protrusion structure according to claim 6, characterized in that: The upper part of the metal back plate is provided with a stud for locking screws of external parts. The first end of the stud has an opening and an internal thread. The second end of the stud has a closing plate larger than the diameter of the stud. The outer periphery of the closing plate has serrations. The closing plate is riveted into the groove of the countersunk hole in the upper part of the metal back plate. The countersunk hole is located on one side of the inner curved surface of the metal back plate.

8. The curved screen back panel corner support protrusion structure according to claim 7, characterized in that: The first end of the stud protrudes from the outer curved surface of the metal backing plate.

9. The curved screen back panel corner support protrusion structure according to claim 8, characterized in that: A stepped ring is provided around the opening at the first end of the stud.

Images