Liquid crystal display module with backlight capable of being embedded into PCB

Abstract

The utility model discloses a liquid crystal display module with backlight capable of being embedded inside a printed circuit board (PCB), which comprises a liquid crystal display (LCD) module, the PCB and a backlight module, the backlight module is arranged between the LCD module and the PCB, conductive connection is arranged between the PCB and the backlight module, and conductive connection is arranged between the LCD module and the PCB, and the liquid crystal display module is characterized in that the PCB comprises a main body area and a hollow area, and a part of the backlight module is embedded in the hollow area. According to the liquid crystal module, the hollow area is arranged on the PCB, and the shape and the size of the hollow area are the same as those of the backlight module, so that the backlight module can be partially embedded into the hollow area, and the thickness of the whole liquid crystal module is reduced through a simple structure.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and particularly to a liquid crystal display module whose backlight can be embedded in a PCB. Background Art

[0002] Liquid crystal display screens have become an indispensable component in various industrial applications, and are widely used in automation control systems, medical equipment, aerospace, transportation systems, industrial monitoring and other fields. The core component of the liquid crystal display is the liquid crystal display module, which is mainly composed of LCD module, backlight and PCB. In the traditional structure, the backlight is sandwiched between the LCD and the PCB to form a sandwich structure with excessive thickness. However, people's demand for electronic products is getting thinner and thinner. Obviously, the traditional liquid crystal display module cannot meet the aesthetic needs of modern people.

[0003] For example, a Chinese utility model patent (CN208000429U) discloses a reinforced LCD display screen, including a PCB board, a metal frame fixed on the PCB board, a display screen fixedly laid on the metal frame, and a backlight board fixedly provided between the PCB board and the display screen, characterized in that: a plurality of fixing feet are fixedly provided on the end face of the metal frame facing the PCB board, the fixing feet are thin metal plates with excellent ductility, the fixing feet are respectively located on both sides of the metal frame, and fixing holes matching the fixing feet are provided on the PCB board, and the ends of the fixing feet passing through the fixing holes are bent and contact the end face of the PCB board facing away from the display screen. The patent fixes the metal frame to the PCB board by bending a plurality of fixing feet, thereby improving the connection strength. However, the applicant found that this structure would result in a very thick thickness of the entire liquid crystal module, especially in the case where both the LCD and the backlight have metal pins, which cannot meet the overall requirement of the liquid crystal module for thinning. Utility Model Content

[0004] Based on this, it is necessary to provide a liquid crystal display module whose backlight can be embedded inside the PCB to address the above technical problems. A hollow area is set on the PCB board so that the backlight module can be partially embedded in the PCB board, thereby reducing the overall thickness of the liquid crystal module.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A liquid crystal display module with a backlight that can be embedded in a PCB, comprising: an LCD module, a PCB board and a backlight module, wherein the backlight module is arranged between the LCD module and the PCB board, conductive connections are arranged between the PCB board and the backlight module, and between the LCD module and the PCB board, and the PCB board comprises a main body area and a hollow area, and part of the backlight module is embedded in the hollow area.

[0007] Furthermore, the backlight module includes a module body and electrode pins extending from the module body, and the shape and size of the module body are adapted to the hollow area.

[0008] Furthermore, the module body is provided with a protruding portion and an embedded portion, and the protruding portion and the embedded portion are connected to each other.

[0009] Furthermore, there are four electrode pins, which are symmetrically arranged on both sides of the module body.

[0010] Furthermore, the module body has an embedded portion below the corresponding electrode pin lower end connection line, and the module body has a protruding portion above the corresponding electrode pin lower end connection line.

[0011] Furthermore, the thickness of the embedded portion is the same as the thickness of the PCB board.

[0012] Furthermore, the LCD module includes a first polarizer, a first glass substrate, a second glass substrate and a second polarizer in sequence, and the second polarizer is adjacent to the backlight module.

[0013] Furthermore, the PCB board and the LCD module are connected via metal PIN pins.

[0014] Furthermore, the first glass substrate is provided with a convex portion, and the convex portion is provided with a conductive layer.

[0015] Furthermore, the metal PIN foot includes a clamping opening and a lead-out end, the clamping opening is clamped on the protrusion, and the lead-out end is connected to the PCB board and vertically penetrates the PCB board.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a liquid crystal display module whose backlight can be embedded in a PCB. By setting a hollow area on the PCB board, and the shape and size of the hollow area are the same as those of the backlight module, the backlight module can be partially embedded in the hollow area. At the same time, a protruding portion and an embedded portion are respectively set at the top and bottom of the backlight module. The thickness of the embedded portion is the same as that of the PCB board and is completely embedded in the PCB board. Therefore, the thickness of the entire liquid crystal module is reduced through a simple structure, providing the possibility for the subsequent production of ultra-thin electronic products.

[0018] At the same time, metal PIN pins are used to connect the PCB board and the LCD module, so that the two form a conductive path and the LCD module is fixed on the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the side structure of a liquid crystal display module with a backlight that can be embedded inside a PCB provided by the utility model;

[0020] Figure 2 A schematic diagram of the side structure of an LCD module of a liquid crystal display module whose backlight can be embedded in a PCB provided by the utility model;

[0021] Figure 3 This is a schematic diagram of the front structure of a PCB board of a liquid crystal display module whose backlight can be embedded inside the PCB provided by the utility model;

[0022] Figure 4 This is a schematic diagram of the front structure of a backlight module of a liquid crystal display module provided by the utility model, in which the backlight can be embedded inside a PCB;

[0023] Figure 5 A schematic diagram of the side structure of a backlight module of a liquid crystal display module provided by the utility model, in which the backlight can be embedded inside a PCB;

[0024] Figure 6 A schematic diagram of the side structure of the backlight module and the PCB board of the liquid crystal display module whose backlight can be embedded in the PCB provided by the utility model after assembly;

[0025] Figure 7 The utility model provides a front structural schematic diagram of a backlight module and a PCB board of a liquid crystal display module whose backlight can be embedded inside a PCB after being assembled.

[0026] The markings in the figure are as follows:

[0027] LCD module 1, first polarizer 11, first glass substrate 12, second glass substrate 13, convex head 131, second polarizer 14;

[0028] Metal PIN pin 2, clamping opening 21, lead-out end 22;

[0029] PCB board 3, main body area 31, hollow area 32, exposed copper part 311, communication pin 312, metal via 313;

[0030] Backlight module 4 , electrode pins 41 , module body 42 , protruding portion 421 , embedded portion 422 . DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0032] 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 a limitation on the present invention.

[0033] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] As described in the background art, the thickness of the liquid crystal module in the prior art is too large, which does not conform to the aesthetic trend of modern society.

[0035] In order to solve this technical problem, the utility model provides a liquid crystal display module whose backlight can be embedded in a PCB, which is applied to through-type solid phase extraction.

[0036] For details, please refer to Figure 1-7 A liquid crystal display module with a backlight that can be embedded in a PCB comprises: an LCD module 1, a PCB board 3 and a backlight module 4, wherein the backlight module 4 is arranged between the LCD module 1 and the PCB board 3, conductive connections are arranged between the PCB board 3 and the backlight module 4, and between the LCD module 1 and the PCB board 3, wherein the PCB board 3 comprises a main body area 31 and a hollow area 32, and a part of the backlight module 4 is embedded in the hollow area 32.

[0037] The utility model provides a liquid crystal display module whose backlight can be embedded inside a PCB. A hollow area 32 matching the size and shape of a backlight module 4 is formed by hollowing out a PCB board 3. When a portion of the backlight module 4 is embedded in the hollow area 32, the overall thickness of the liquid crystal module is reduced. The backlight module 4 includes a protruding portion 421 and an embedded portion 422. The thickness of the embedded portion 422 is set to be equal to the thickness of the PCB board 3. In this way, the embedded portion 422 can be completely placed in the hollow area 32 and fit each other.

[0038] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] Example 1

[0042] Please refer to Figure 1-7 The utility model provides a liquid crystal display module with a backlight that can be embedded in a PCB, including an LCD module 1, a PCB board 3 and a backlight module 4. The backlight module 4 is arranged between the LCD module 1 and the PCB board 3, and part of the backlight module 4 is embedded in the PCB board 3, thereby significantly reducing the total thickness of the liquid crystal display module. Conductive connections are provided between the PCB board 3 and the backlight module 4, and between the LCD module 1 and the PCB board 3. The PCB board 3 controls the backlight module 4 to provide a light source and the liquid crystal display function of the LCD module 1.

[0043] Further, such as Figure 2 As shown, the LCD module 1 includes a first polarizer 11, a first glass substrate 12, a second glass substrate 13 and a second polarizer 14 in sequence, wherein the first glass substrate 12 and the second glass substrate 13 are filled with liquid crystal material, and the liquid crystal material can change the arrangement state, the second polarizer 14 is adjacent to the backlight module 4, and the first polarizer 11 is adjacent to the LCD panel.

[0044] Furthermore, the PCB board 3 and the LCD module 1 are connected via a metal PIN pin 2, one end of the metal PIN pin 2 is connected to the conductive layer of the second glass substrate 13, and the other end is connected to the PCB board 3, thereby forming a conduction circuit between the PCB board 3 and the LCD module 1, and controlling the arrangement of the liquid crystal material inside the first glass substrate 12 and the second glass substrate 13.

[0045] Furthermore, the metal PIN pin 2 includes a clamp 21 and a lead-out end 22. The size of the second glass substrate 13 is larger than that of the first glass substrate 12. The portion of the second glass substrate 13 that protrudes from the first glass substrate 12 forms a convex head 131. The convex head 131 is provided with a conductive layer, and the conductive layer is an ITO film layer. The clamp 21 is clamped on the convex head 131 of the second glass substrate 13. The lead-out end 22 is connected to the PCB board 3 and vertically penetrates the PCB board 3, forming a conduction circuit and changing the arrangement of liquid crystal molecules in the first glass substrate 12 and the second glass substrate 13 through changes in voltage.

[0046] Furthermore, the metal PIN pins 2 are provided in a plurality according to circuit design requirements, and not only form a conduction path, but also play a role in fixing the LCD module 1 on the PCB board 3 .

[0047] like Figure 3 As shown, the PCB board 3 includes a main area 31 and a hollow area 32. The hollow area 32 is formed by hollowing out the middle position of the main area 31. Specifically, the hollow area 32 is rectangular, and its shape and size are adapted to the backlight module 4. During installation, the backlight module 4 is partially embedded in the hollow area 32 to reduce the overall thickness of the liquid crystal module.

[0048] Furthermore, a copper exposed portion 311 is provided on the main area 32, and the backlight module 4 is welded to the copper exposed portion 311 to form a conducting path on the PCB board 3. Specifically, there are four copper exposed portions 311, and the four copper exposed portions 311 are arranged opposite to each other in pairs.

[0049] Furthermore, the main body area 32 is provided with a communication pin 312 and a metal via 313. The communication pin 312 is connected to the terminal host, and the metal via 313 is welded to the lead-out end 22 of the metal PIN foot 2 to fix the LCD module, thereby forming a complete control system.

[0050] like Figure 6 and 7 As shown, during installation, the communication pin 312 on the PCB board 3 is connected to the terminal host, the backlight module 4 is partially embedded in the hollow area 32 and then welded to the four copper-exposed parts 311, the LCD module 1 is placed on the backlight module 4, the lead ends 22 of multiple metal PIN pins 2 are vertically inserted into the PCB board 3 and then welded to the metal vias 313 of the PCB board 3, and the clamping openings 21 of the metal PIN pins 2 are clamped on the conductive layer of the second glass substrate 13 to fix the LCD module 1 on the PCB board 3 and form a conductive path.

[0051] like Figure 4 and 5As shown, the backlight module 4 includes a module body 42 and electrode pins 41 led out from opposite sides of the module body 42. The shape and size of the module body 42 are adapted to the hollow area 32 of the PCB board 3. The module body 42 is arranged correspondingly according to the position of the copper exposed part 311 of the PCB board 3. The module body 42 can be partially embedded in the hollow area 32. There are 4 electrode pins 41 in total. Specifically, the module body 42 can lead out electrode pins 41 from the upper and lower sides or from the left and right sides. The electrode pins 41 are arranged corresponding to the position of the copper exposed part 311. When installing, the electrode pins 41 are welded to the copper exposed part 311 to form a conductive path between the backlight module 4 and the PCB board 3.

[0052] Furthermore, the module body 42 is provided with a protruding portion 421 and an embedded portion 422. The protruding portion 421 and the embedded portion 422 are connected to each other. Specifically, the module body 42 is provided with the embedded portion 422 below the lower end connection line of the two corresponding electrode pins 41 up and down or left and right, and the module body 42 is provided with the protruding portion 421 above the lower end connection line of the two corresponding electrode pins 41. The embedded portion 422 can be completely embedded in the hollow area 32 of the PCB board 3, that is, the thickness of the embedded portion 422 is equal to the thickness of the PCB board 3, and the protruding portion 421 is adjacent to the LCD module 1. During installation, the embedded portion 422 is embedded in the hollow area 32, and the electrode pins 41 are aligned with the exposed copper part 311 for welding to complete the installation operation of the backlight module 4 and the PCB board 3.

[0053] The use process of the liquid crystal display module provided by the utility model is as follows: align the electrode pin 41 of the backlight module 4 with the copper exposed part 311 of the PCB board 3, and at the same time, embed the embedding part 422 along the hollow area 32 of the PCB board 3, and then weld the electrode pin 41 to the copper exposed part 311; weld the communication pin 312 of the PCB board 3 to the terminal host; cover the second polarizer 14 of the LCD module 1 downward on the backlight module 4, and according to the circuit design, insert the lead-out end 22 of the multiple metal PIN pins 2 into the PCB board 3 and then weld them to the metal via 313, and clamp the clamp 21 of the metal PIN pin 2 on the conductive layer of the second glass substrate 13; finally, cover the panel of the LCD module on the LCD module to complete the installation of the liquid crystal display module.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" 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, an electrical connection, or communication with each other; it can be 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A liquid crystal display module with a backlight that can be embedded in a PCB, comprising: An LCD module (1), a PCB board (3) and a backlight module (4), wherein the backlight module (4) is arranged between the LCD module (1) and the PCB board (3), and conductive connections are provided between the PCB board (3) and the backlight module (4), as well as between the LCD module (1) and the PCB board (3), and the PCB board (3) is characterized in that the PCB board (3) comprises a main body area (31) and a hollow area (32), and a portion of the backlight module (4) is embedded in the hollow area (32).

2. The liquid crystal display module with a backlight that can be embedded in a PCB according to claim 1, characterized in that: The backlight module (4) comprises a module body (42) and electrode pins (41) extending from the module body (42); the shape and size of the module body (42) are adapted to the hollow area (32).

3. The liquid crystal display module with a backlight that can be embedded in a PCB according to claim 2, characterized in that: The module body (42) is provided with a protruding portion (421) and an embedded portion (422), and the protruding portion (421) and the embedded portion (422) are connected to each other.

4. The liquid crystal display module with a backlight that can be embedded in a PCB according to claim 3, characterized in that: There are four electrode pins (41), which are symmetrically arranged in pairs on both sides of the module body (42).

5. The liquid crystal display module with backlight embedded in PCB according to claim 4, characterized in that: The module body (42) has an embedded portion (422) below the connection line at the lower end of the corresponding electrode pin (41), and the module body (42) has a protruding portion (421) above the connection line at the lower end of the corresponding electrode pin (41).

6. The liquid crystal display module with a backlight that can be embedded in a PCB according to claim 5, characterized in that: The thickness of the embedded portion (422) is the same as the thickness of the PCB board (3).

7. The liquid crystal display module with a backlight that can be embedded in a PCB according to claim 1, characterized in that: The LCD module (1) comprises in sequence a first polarizer (11), a first glass substrate (12), a second glass substrate (13) and a second polarizer (14), wherein the second polarizer (14) is adjacent to the backlight module (4).

8. The liquid crystal display module with a backlight that can be embedded in a PCB according to claim 7, characterized in that: The PCB board (3) and the LCD module (1) are connected via metal PIN pins (2).

9. The liquid crystal display module with backlight embedded in PCB according to claim 8, characterized in that: The first glass substrate (12) is provided with a convex head (131), and the convex head (131) is provided with a conductive layer.

10. The liquid crystal display module with backlight embedded in PCB according to claim 9, characterized in that: The metal PIN foot (2) comprises a clamping opening (21) and a lead-out end (22), wherein the clamping opening (21) is clamped on the protruding head (131), and the lead-out end (22) is connected to the PCB board (3) and vertically penetrates the PCB board (3).

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