Energy-saving mini led module and panel based on common cathode technology

Abstract

The application discloses an energy-saving MINI LED module and panel based on a common cathode technology. The energy-saving MINI LED module based on the common cathode technology comprises a circuit substrate and a frame located at the periphery of the circuit substrate, pixel units arranged in an array are arranged on the circuit substrate, the pixel units comprise a bottom shell, a ring and a pixel unit, the pixel unit is arranged in the bottom shell, the ring covers the pixel unit and is connected with the upper surface of the bottom shell, first, second, third and fourth grooves are arranged on the bottom shell and used for allowing an anode and a common cathode of each MINI LED monomer included in the pixel unit to pass out, and the bottom shell and the ring are matched to play a protection role on the side surface of each MINI LED monomer from the outside.

Description

Technical Field

[0001] This application relates to the field of LED technology, specifically to energy-saving MINI LED modules and panels based on common cathode technology. Background Technology

[0002] Mini LED is defined as an LED device with a chip size between 50 and 200 μm. It consists of a mini LED pixel array and driving circuitry, with a pixel pitch of 0.3-1.5 mm. With the rapid development of mini LED display technology, mini LED display products have begun to be applied to ultra-large screen high-definition displays, such as in commercial fields like monitoring and command centers, high-definition broadcasting, high-end cinemas, medical diagnostics, advertising displays, conference and exhibition facilities, office displays, and virtual reality.

[0003] LED screens consist of matrix-arranged MINI LED modules. Currently, the power supply voltage of MINI LED modules in LED screens is usually the same. In order to meet the needs of use, a uniform and larger voltage is usually provided for all MINI LEDs, while MINI LEDs that do not require a larger voltage are connected in series with resistors to act as voltage dividers, which consumes more power.

[0004] Mini LED modules based on common cathode technology have emerged. However, in the manufacturing process of existing mini LED modules, the mini LED units are usually mounted onto the circuit board. Since the mini LED units lack external protective structures, they are easily damaged by impact, resulting in damage such as black spots and bright stripes, which affects the performance. Summary of the Invention

[0005] The purpose of this application is to provide an energy-saving MINI LED module and panel based on common cathode technology to solve the problem that MINI LED units lack external protective structures and are easily damaged by impact.

[0006] In a first aspect, this application provides an energy-saving MINI LED module based on common cathode technology, comprising:

[0007] The circuit board and the frame surrounding the circuit board are provided. Multiple pixel units are arranged in an array on one side of the circuit board. Each pixel unit includes a bottom shell, a retaining ring and three MINI LED units. Each MINI LED unit is placed inside the bottom shell, and the retaining ring is connected to the upper part of the bottom shell.

[0008] The bottom shell includes a shell, which is a hollow rectangular shape with an opening at the top. A first groove is provided on the left side wall of the shell, and a second groove and a third groove are provided on the left side of the front and rear side walls of the shell, respectively. A fourth groove is also provided on the front wall of the shell.

[0009] The retaining ring includes a frame whose shape is adapted to the shape of the opening at the top of the bottom shell. The lower surface of the frame is provided with a first protrusion, a second protrusion, a third protrusion, and a fourth protrusion that correspond one-to-one with the positions of the first groove, the second groove, the third groove, and the fourth groove. When the retaining ring is placed on the bottom shell, the frame is attached to the upper surface of the shell, and the first protrusion, the second protrusion, the third protrusion, and the fourth protrusion are inserted into the first groove, the second groove, the third groove, and the fourth groove respectively.

[0010] The three MINI LED units are arranged side by side and each displays red, green and blue respectively. The anodes of the three MINI LED units pass through the first groove, the second groove and the third groove respectively. The common cathode of the three MINI LED units passes through the fourth groove. The anode and the common cathode of each MINI LED unit are connected to the driving circuit on the circuit board.

[0011] In one possible implementation, the bottom shell is made of insulating and flame-retardant plastic material.

[0012] In a possible implementation, the upper side of the outer wall of the pixel unit is recessed to form a snap-fit ​​position, and the frame is snapped into the snap-fit ​​position.

[0013] In a possible implementation, after the first, second, third, and fourth protrusions are snapped into the corresponding slots, the distance between them and the circuit board is less than the thickness of the anode and the common cathode of the MINI LED unit.

[0014] In one possible implementation, the lower surface of the housing is provided with an adhesive groove, and an adhesive strip is provided inside the adhesive groove. The housing is fixed to the circuit board through the adhesive groove.

[0015] In one possible implementation, the upper opening of the housing is bonded to the lower surface of the frame using an adhesive.

[0016] In a possible implementation, the connection points where the anode and common cathode of each MINI LED unit are connected to the driving lines on the circuit board are coated with a waterproof coating.

[0017] In a second aspect, this application provides an energy-saving MINI LED display panel based on common cathode technology, employing the energy-saving MINI LED module based on common cathode technology as described above.

[0018] Possible implementations also include a panel frame, wherein the energy-saving MINI LED module based on common cathode technology is fixed to the panel frame via the frame;

[0019] Corresponding to the side of the circuit board where the pixel unit is not provided, the panel frame is provided with a protective layer with a hollow structure.

[0020] The portion of the panel frame that contacts the edge is provided with a mounting groove, and the mounting groove is provided with a waterproof rubber ring.

[0021] One possible implementation also includes a driver circuit board, which is electrically connected to the circuit board substrate.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] The bottom shell is provided with the first groove, the second groove, the third groove and the fourth groove, which are used to allow the anode and the common cathode of each MINI LED unit included in the pixel unit to pass through. The bottom shell and the retaining ring cooperate to protect the sides of each MINI LED unit from the outside. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of the energy-saving MINI LED module based on common cathode technology provided in this application;

[0025] Figure 2 A schematic diagram of a pixel unit provided in an embodiment of this application;

[0026] Figure 3 Examples of this application Figure 2 A diagram showing the result after removing the retaining ring;

[0027] Figure 4 This is a schematic diagram of the structure of a MINI LED unit provided in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of the structure of the retaining ring provided in an embodiment of this application;

[0029] Figure 6 A schematic diagram of the lower surface structure of the housing provided in an embodiment of this application;

[0030] Figure 7 This is a schematic diagram of the wiring structure between each MINI LED unit in the pixel unit provided in the embodiments of this application;

[0031] Figure 8 A schematic diagram of the structure of an energy-saving MINI LED panel based on common cathode technology provided in this application embodiment;

[0032] Figure 9 This is a schematic diagram of the panel frame of an energy-saving MINI LED panel based on common cathode technology provided in an embodiment of this application.

[0033] Reference numerals: 1. Frame, 2. Circuit board, 3. Pixel unit, 31. Bottom shell, 311. Housing, 312. First groove, 313. Second groove, 314. Third groove, 315. Fourth groove, 317. Adhesive groove, 32. Snap ring, 321. Frame, 322. Snap slot, 323. First protrusion, 324. Second protrusion, 325. Third protrusion, 326. Fourth protrusion, 33. Mini LED unit, 331. Snap-on position, 332. Anode, 333. Cathode, 4. Panel frame, 41. Mounting groove, 42. Protective layer. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Combination Figures 1 to 9 The protection scheme of this application is described in detail as follows:

[0037] This application provides an energy-saving MINI LED module based on common cathode technology, including:

[0038] like Figure 1 As shown, the circuit board 2 and the frame 1 located around the circuit board 2 are provided with pixel units 3 arranged in an array on the circuit board 2.

[0039] like Figure 2As shown, the pixel unit 3 includes a bottom shell 31, a retaining ring 32, and three mini LED units 33. The bottom shell 31 is made of insulating and flame-retardant plastic. Each mini LED unit 33 is placed inside the bottom shell 31. The retaining ring 32 covers each mini LED unit 33 and is connected to the upper surface of the bottom shell 31.

[0040] Flame retardant plastics can be classified into UL94V0, UL94V1, and UL94V2 levels. This means that non-flame retardant plastics can achieve a flame retardant rating by adding flame retardants. Common flame retardant materials include ABS, PP, PC, nylon, and TPU. The insulating flame retardant plastic material of the bottom shell 31 is selected according to specific circumstances.

[0041] like Figures 2 to 4 As shown, the bottom shell 31 supports the bottom of each MINI LED unit 33. Ribs (not shown in the figure, but set in the mold during actual processing) are provided on the inner or outer wall of the bottom shell 31 to strengthen the overall structure of the bottom shell 31. The bottom shell 31 includes a housing 311, which is a hollow rectangular shape with an opening at the top. A first groove 312 is formed on the left side wall (first side wall) of the housing 311. A second groove 313 and a third groove 314 are respectively formed on the left side of the front and rear side walls (the two side walls adjacent to the first side wall). A fourth groove 315 is also formed on the front wall (the side wall opposite to the first side wall). Therefore, the bottom shell 31 can protect the sides of each MINI LED unit 33.

[0042] It should be noted that, as Figure 6 As shown, the lower surface of the housing 311 is provided with an adhesive groove 317, and an adhesive strip is provided inside the adhesive groove 317. The housing 311 can be bonded to the circuit board 2 through the adhesive groove 317. In some possible examples, the housing 311 can also be fixed to the circuit board 2 by heat fusion or welding.

[0043] like Figure 5As shown, the retaining ring 32 includes a frame 321 whose shape is adapted to the shape of the opening at the top of the bottom shell 31. The upper side of the outer wall of the MINI LED unit 33 is recessed to form a retaining position 331. The frame 321 is engaged at the retaining position 331. The lower side of the inner side of the frame 321 is recessed to form a retaining groove 322. The retaining groove 322 is concave, so the upper side of the inner side of the frame 321 forms a protruding shape. The retaining groove 322 is engaged on the outer wall of the retaining position 331. The protruding part of the inner side of the frame 321 covers the edge of the upper surface of the retaining position 331, which can also achieve the function of pressing and fixing the MINI LED unit 33. In some possible examples, after the first protrusion 323, the second protrusion 324, the third protrusion 325 and the fourth protrusion 326 are snapped into the corresponding slots, the distance between them and the circuit board 2 is less than the thickness of the anode 332 and the common cathode 333 of the MINI LED unit 33. Of course, this thickness can be adjusted by pre-designing the length of each protrusion so that a suitable fixing force can be applied to the anode 332 and the common cathode 333 of each MINI LED unit 33.

[0044] During installation, the first protrusion 323, the second protrusion 324, the third protrusion 325, and the fourth protrusion 326 are inserted into the lower side of the first groove 312, the second groove 313, the third groove 314, and the fourth groove 315 respectively. The lower ends of the first protrusion 323, the second protrusion 324, the third protrusion 325, and the fourth protrusion 326 are left with space between them and the interior of the first groove 312, the second groove 313, the third groove 314, and the fourth groove 315 so that the anode 332 and the common cathode 333 of the MINI LED unit 33 can pass through. The left and right sides of the first protrusion 323, the second protrusion 324, the third protrusion 325, and the fourth protrusion 326 are fitted with the left and right sides of the first groove 312, the second groove 313, the third groove 314, and the fourth groove 315 to achieve a seal.

[0045] In some possible examples, during installation, each structural layer is first placed inside the housing 311, the lower surface of the frame 321 is aligned with the upper opening of the housing 311, adhesive is filled between the lower surface of the housing 311 and the upper opening of the housing 311, and then they are pressed together.

[0046] The upper opening of the housing 311 is bonded to the lower surface of the frame 321 with an adhesive. The lower surface of the frame 321 is provided with a first protrusion 323, a second protrusion 324, a third protrusion 325, and a fourth protrusion 326 corresponding to the positions of the first groove 312, the second groove 313, the third groove 314, and the fourth groove 315. When the retaining ring 32 is placed on the bottom shell 31, the frame 321 is attached to the upper surface of the housing 311, and the first protrusion 323, the second protrusion 324, the third protrusion 325, and the fourth protrusion 326 are inserted into the first groove 312, the second groove 313, the third groove 314, and the fourth groove 315 respectively.

[0047] The MINI LED unit 33 is inserted into the housing 311 from top to bottom, with the anode 332 and common cathode 333 of the MINI LED unit 33 passing through the first groove 312, the second groove 313, the third groove 314, and the fourth groove 315 respectively, and soldered to the corresponding pads on the circuit board 2. Then, the retaining ring 32 is fastened onto the housing 311, with the first protrusion 323, the second protrusion 324, the third protrusion 325, and the fourth protrusion 326 correspondingly inserted into the first groove 312, the second groove 313, the third groove 314, and the fourth groove 315, and the first protrusion 323, the second protrusion 324, the third protrusion 325, and the fourth protrusion 326 pressing on the anode 332 and the common cathode 333, clamping and fixing the anode 332 and the common cathode 333 to prevent them from loosening.

[0048] Sealant can also be injected into the edge of the MINI LED unit 33 and the inside of the frame 321 to prevent the edge of the MINI LED unit 33 from becoming loose from the frame 321.

[0049] In addition, a waterproof coating can be applied to the connection points where the anode 332 and common cathode 333 of each MINI LED unit are connected to the drive lines on the circuit board 2 for moisture protection.

[0050] like Figures 2 to 4 As shown, there can be three MINI LED units 33, which are arranged side by side. The three MINI LED units 33 are red, green and blue respectively. The cathodes of the three MINI LED units 33 are connected to form a common cathode 333. The anodes 332 of the three MINI LED units 33 pass through the first groove 312, the second groove 313 and the third groove 314 respectively. The common cathode 333 passes through the fourth groove 315. The anodes 332 and the common cathode 333 of the MINI LED units 33 are electrically connected to the driving lines on the circuit board 2.

[0051] like Figure 7As shown, the MINI LED units 33 included in a pixel unit adopt a common cathode power supply mode to achieve the purpose of energy saving of LED display screen.

[0052] This application also provides an energy-saving MINI LED display panel based on common cathode technology, which uses the energy-saving MINI LED module based on common cathode technology as described above.

[0053] like Figure 8 As shown, in some possible examples, the display panel may include a panel frame 4, and an energy-saving MINI LED module based on common cathode technology can be fixed to the panel frame 4 through a frame 1;

[0054] like Figure 9 As shown, on the side of the circuit board 2 where no pixel unit 3 is provided, the panel frame 4 is provided with a protective layer 42 with a hollow structure.

[0055] The part of the panel frame 4 that contacts the frame 1 is provided with a mounting groove 41, and the mounting groove 41 is provided with a waterproof rubber ring (not shown in the figure).

[0056] In some possible examples, a driver circuit board is also included, which is electrically connected to the circuit board 2.

[0057] The foregoing has shown and described the basic principles, main features, and beneficial effects of this application. It is obvious to those skilled in the art that this application is not limited to the details of the above exemplary embodiments, and that this application can be implemented in other specific forms without departing from the spirit or basic characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this application is defined by the appended claims rather than the foregoing description. Therefore, it is intended to encompass all changes that fall within the meaning and scope of the equivalents of the claims within this application, and no reference numerals in the claims should be regarded as limiting the claims involved.

[0058] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving MINI LED module based on a common cathode technology, characterized in that, The application relates to a circuit board (2) and a frame (1) located at the periphery of the circuit board (2), a plurality of pixel units (3) arranged in an array are arranged on one side of the circuit board (2), the pixel unit (3) comprises a bottom shell (31), a ring (32) and three MINI LED monomers (33), each MINI LED monomer (33) is arranged in the bottom shell (31), and the ring (32) is connected with the upper part of the bottom shell (31). The bottom shell (31) comprises a shell (311), the shell (311) is in the shape of a hollow and open-top rectangle, a first groove (312) is formed in the left side wall of the shell (311), a second groove (313) and a third groove (314) are respectively formed in the left side walls of the front and back side walls of the shell (311), and a fourth groove (315) is further formed in the front wall of the shell (311). The ring (32) comprises a frame (321) which is in the shape of a frame matched with the shape of the open-top part of the bottom shell (31), the lower surface of the frame (321) is provided with a first convex strip (323), a second convex strip (324), a third convex strip (325) and a fourth convex strip (326) which are in one-to-one correspondence with the positions of the first groove (312), the second groove (313), the third groove (314) and the fourth groove (315), when the ring (32) is covered on the bottom shell (31), the frame (321) is attached to the upper surface of the shell (311), and the first convex strip (323), the second convex strip (324), the third convex strip (325) and the fourth convex strip (326) are inserted into the first groove (312), the second groove (313), the third groove (314) and the fourth groove (315) in correspondence. The three MINI LED monomers (33) are arranged side by side and correspondingly display red, green and blue, the anodes (332) of the three MINI LED monomers (33) respectively pass through the first groove (312), the second groove (313) and the third groove (314) in one-to-one correspondence, the common cathode (333) of the three MINI LED monomers (33) passes through the fourth groove (315), and the anode (332) and the common cathode (333) of each MINI LED monomer (33) are connected with the driving circuit on the circuit board (2). The bottom shell (31) is made of insulating and flame-retardant plastic material.

2. The energy-saving MINI LED module based on the common cathode technology according to claim 1, characterized in that, The outer wall of the pixel unit (3) is recessed on the upper side to form a clamping position (331), and the frame (321) is clamped at the clamping position (331).

3. The energy-saving MINI LED module based on the common cathode technology according to claim 1, characterized in that, After being clamped into the corresponding grooves, the spacing between the first convex strip (323), the second convex strip (324), the third convex strip (325) and the fourth convex strip (326) and the circuit board (2) is smaller than the thickness of the anode (332) and the common cathode (333) of the MINI LED monomer (33).

4. The energy-saving MINI LED module based on the common cathode technology according to claim 1, characterized in that, ​ 5. The energy-saving MINI LED module based on the common cathode technology according to claim 1, characterized in that, The lower surface of the shell (311) is provided with an adhesive groove (317), the inside of the adhesive groove (317) is provided with an adhesive tape, and the shell (311) is fixed on the circuit substrate (2) through the adhesive groove (317).

6. The energy-saving MINI LED module based on the common cathode technology according to claim 1, characterized in that, The upper opening of the shell (311) and the lower surface of the frame (321) are bonded by an adhesive.

7. The energy-saving MINI LED module based on the common cathode technology according to claim 1, characterized in that, The anode (332) and the common cathode (333) of each MINI LED unit (33) are coated with a waterproof coating at the connection with the driving circuit on the circuit substrate (2).

8. An energy-saving MINI LED display panel based on the common cathode technology, characterized in that, An energy-saving MINI LED module based on the common cathode technology is adopted.

9. The energy-saving MINI LED display panel based on the common-cathode technology according to claim 8, characterized in that, A panel frame (4) is further included, and the energy-saving MINI LED module based on the common cathode technology is fixed on the panel frame (4) through the frame (1). A protective layer (42) with a hollow structure is arranged on the panel frame (4) corresponding to the side of the circuit substrate (2) without the pixel unit (3). The part of the panel frame in contact with the frame (1) is provided with a mounting groove (41), and the mounting groove is provided with a waterproof rubber ring.

10. The energy-saving MINI LED display panel based on the common-cathode technology according to claim 8 or 9, characterized in that, A driving circuit board is further included, and the driving circuit board is electrically connected with the circuit substrate (2).

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