LED display module reaching waterproof grade IP66

Abstract

The utility model discloses an LED (light-emitting diode) display module reaching the waterproof grade IP66, which comprises a cover plate, a reflection cavity component clamped with the cover plate for use, and a silk-screen panel positioned between the cover plate and the reflection cavity component, the reflection cavity component is of a shell structure with a lower opening, a cavity is formed in the reflection cavity component, and a PCB (printed circuit board) component is horizontally arranged in the cavity on the reflection cavity component. A back glue layer at a lower opening position of the reflection cavity assembly is filled with silica gel below the PCB assembly; the top surface of a reflection cavity on the reflection cavity assembly is provided with a hole; the reflection cavity assembly is provided with an epoxy glue layer in which epoxy resin is encapsulated into a cavity of the reflection cavity assembly through the front surface of the hole; and a sealing ring is arranged between the cover plate and the reflection cavity assembly. A back glue layer at the position of a lower opening of a reflection cavity assembly is filled with silica gel below a PCB assembly, an epoxy glue layer is arranged on the reflection cavity assembly, epoxy resin is filled into a cavity of the reflection cavity assembly through the front face of a hole, and a sealing ring is arranged between a cover plate and the reflection cavity assembly, so that comprehensive dust prevention and water prevention of the LED display module are achieved.

Description

Technical Field

[0001] The utility model relates to an LED display module that reaches the waterproof grade IP66, and in particular to an LED display module that has a compact structure, good dustproof effect, and is waterproof and dustproof. Background Art

[0002] There are many types of LED spring-loaded touchscreen displays on the market. Compared with touch switches and ITO touchscreens, they offer higher touch sensitivity, meet user needs, and are relatively low-cost. However, their water and dust resistance is inferior to that of ITO films or touch switches, and can even fail to meet basic water and dust resistance requirements.

[0003] In order to cooperate with multi-scene applications and achieve waterproof and dustproof effects in specific environments, such as faucets, bathrooms and other scenes, it is urgent to research an LED display module with good dustproof effect and waterproof and dustproof properties. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an LED display module that reaches the waterproof grade IP66, and has the characteristics of compact structure, good dustproof effect, and waterproof and dustproof.

[0005] To solve the above technical problems, the technical solution of the utility model is: an LED display module that achieves a waterproof rating of IP66, the innovation of which is that the LED display module includes a cover plate, a reflective cavity assembly located below the cover plate and engaged with the cover plate, and a silk-screen panel located horizontally between the cover plate and the reflective cavity assembly; the reflective cavity assembly is a lower-opening shell structure with a cavity formed therein; a PCB assembly is horizontally arranged within the cavity of the reflective cavity assembly; and a backing adhesive layer of silicone is provided below the PCB assembly to seal the lower opening of the reflective cavity assembly.

[0006] A touch spring located on the PCB assembly is provided between the PCB assembly and the reflective cavity assembly; a hole is provided on the top surface of the reflective cavity of the reflective cavity assembly so as to be parallel to or coincide with the central axis of the touch spring; and an epoxy glue layer is provided on the reflective cavity assembly so as to be poured into the cavity of the reflective cavity assembly through the front surface of the hole.

[0007] A sealing ring is provided between the cover plate and the reflection cavity assembly.

[0008] Preferably, a positioning ring groove for embedding the sealing ring is provided around the upper ring of the reflection cavity assembly.

[0009] Preferably, the cross-section of the sealing ring is O-shaped.

[0010] Preferably, the diameter of the hole provided on the top surface of the reflective cavity assembly is smaller than the outer diameter of the touch spring, and the touch spring abuts against the inner wall of the top surface of the reflective cavity assembly.

[0011] Preferably, the PCB assembly is provided with leads passing through the adhesive layer for electrical connection with an external structure.

[0012] Preferably, the cover plate includes a horizontally arranged cover plate top surface and a vertically arranged cover plate side surface, the cover plate side surface is engaged with the reflective cavity assembly, and the cover plate top surface is a semi-transparent black structure.

[0013] Preferably, a plurality of touch springs are provided between the PCB assembly and the reflective cavity assembly, and the reflective cavity assembly is provided with holes corresponding one-to-one to the touch springs.

[0014] Preferably, the capacitance value in the PCB assembly is 103 μF, which is 1 / 4 of the conventional capacitance value.

[0015] The advantages of the present invention are that: a back glue layer is provided below the PCB component to seal the lower opening of the reflection cavity component with silicone, an epoxy glue layer is provided on the reflection cavity component to seal the inside of the reflection cavity component through the front face of the hole, and a sealing ring is provided between the cover plate and the reflection cavity component, thereby achieving comprehensive dust and water resistance for the LED display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementations.

[0017] Figure 1 This is a three-dimensional exploded view of an LED display module of the present invention that reaches the waterproof grade IP66.

[0018] Figure 2 The utility model is a structural schematic diagram of an LED display module that reaches the waterproof grade IP66.

[0019] Figure 3 The utility model is a structural schematic diagram of an LED display module that reaches the waterproof grade IP66 when not filled with an epoxy glue layer.

[0020] Figure 4 The utility model is a partial structural diagram of an LED display module that reaches the waterproof grade IP66.

[0021] In the figure: 1-cover, 2-reflection cavity assembly, 3-silk screen panel, 4-PCB assembly, 5-back adhesive layer, 6-touch spring, 7-hole, 8-epoxy glue layer, 9-sealing ring, 10-lead. DETAILED DESCRIPTION

[0022] The LED display module of the present invention includes a cover plate 1, a reflective cavity assembly 2 located below the cover plate 1 and engaged with the cover plate 1, and a silk-screen panel 3 located horizontally between the cover plate 1 and the reflective cavity assembly 2. The reflective cavity assembly 2 is a shell structure with a lower opening formed therein, and a PCB assembly 4 is horizontally arranged within the cavity of the reflective cavity assembly 2. A backing adhesive layer 5 is provided below the PCB assembly 4 to seal the lower opening of the reflective cavity assembly 2 with silicone.

[0023] A touch spring 6 is provided on the PCB assembly 4 between the PCB assembly 4 and the reflection cavity assembly 2. A hole 7 is provided on the top surface of the reflection cavity on the reflection cavity assembly 2, which is parallel to or coincident with the central axis of the touch spring 6. An epoxy glue layer 8 is provided on the reflection cavity assembly 2, and epoxy resin is poured into the cavity of the reflection cavity assembly 2 through the front of the hole 7; a sealing ring 9 is provided between the cover plate 1 and the reflection cavity assembly 2.

[0024] By providing a back glue layer 5 at the lower opening of the reflection cavity component 2 with silicone potting below the PCB component 4, and an epoxy glue layer 8 on the reflection cavity component 2 with epoxy resin potting into the cavity of the reflection cavity component 2 through the hole 7 on the front, and a sealing ring 9 between the cover plate 1 and the reflection cavity component 2, the LED display module is fully dustproof and waterproof.

[0025] In order to ensure that the reflection cavity assembly 2 and the cover plate 1 can achieve good dust and water resistance between the product and the shell, a positioning ring groove for the sealing ring 9 to be embedded is provided around the reflection cavity assembly 2, and the cross-section of the sealing ring 9 is O-shaped.

[0026] In order to ensure that the touch spring 6 does not extend beyond the reflective cavity assembly 2 and to create conditions for subsequent sealing, the hole 7 provided on the top surface of the reflective cavity assembly 2 is directly smaller than the outer diameter of the touch spring 6 , and the touch spring 6 rests on the inner wall of the top surface of the reflective cavity assembly 2 .

[0027] The PCB assembly 4 is equipped with leads 10 that pass through the adhesive layer 5 for electrical connection to external structures. The cover 1 includes a horizontal top surface and vertical side surfaces. The side surfaces engage with the reflective cavity assembly 2, while the top surface of the cover 1 is a semi-transparent black structure. Several touch springs 6 are positioned between the PCB assembly 4 and the reflective cavity assembly 2, and the reflective cavity assembly 2 is provided with holes 7 corresponding to each of the touch springs 6.

[0028] To ensure the touch performance of touch spring 6, the capacitance value in PCB component 4 is 103μF, which is 1 / 4 of the standard capacitance value. First, we change the capacitance of C4 from 403μF to 103μF to increase sensitivity. The principle is that when there is no touch or pressing, only Cs is charged, and the charging time is T1. When TPAD is pressed, the capacitance increases, so the charging time is T2. We can determine whether a key has been pressed by monitoring the charge and discharge time. If T2-T1 is greater than a certain value, it can be determined that a key has been pressed. If the capacitance of Cs is reduced, the original charging time T1 will be shortened, while the capacitance of Cx during touch remains essentially unchanged. The difference between T2 and T1 will increase, the touch change will be greater, and the touch sensitivity will be more sensitive.

[0029] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and these variations and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. An LED display module that achieves IP66 waterproof rating, characterized by: The LED display module includes a cover plate, a reflective cavity assembly located below the cover plate and engaged with the cover plate, and a silk-screen panel located horizontally between the cover plate and the reflective cavity assembly. The reflective cavity assembly is a lower-opening shell structure with a cavity formed therein. A PCB assembly is horizontally arranged in the cavity on the reflective cavity assembly. A backing adhesive layer is provided below the PCB assembly to seal the lower opening of the reflective cavity assembly with silicone. A touch spring located on the PCB assembly is provided between the PCB assembly and the reflective cavity assembly; a hole is provided on the top surface of the reflective cavity of the reflective cavity assembly so as to be parallel to or coincide with the central axis of the touch spring; and an epoxy glue layer is provided on the reflective cavity assembly so as to be poured into the cavity of the reflective cavity assembly through the front surface of the hole. A sealing ring is provided between the cover plate and the reflection cavity assembly.

2. The LED display module with IP66 waterproof rating according to claim 1, wherein: A positioning ring groove for embedding the sealing ring is provided around the upper ring of the reflection cavity assembly.

3. The LED display module with IP66 waterproof rating as claimed in claim 2, characterized in that: The cross section of the sealing ring is O-shaped.

4. The LED display module with IP66 waterproof rating according to claim 1, wherein: The diameter of the hole provided on the top surface of the reflection cavity component is smaller than the outer diameter of the touch spring, and the touch spring rests on the inner wall of the top surface of the reflection cavity component.

5. The LED display module with IP66 waterproof rating as claimed in claim 1, characterized in that: The PCB assembly is provided with leads that pass through the adhesive layer and are used for electrical connection with an external structure.

6. The LED display module with IP66 waterproof rating according to claim 1, wherein: The cover plate includes a horizontally arranged cover plate top surface and a vertically arranged cover plate side surface. The cover plate side surface is engaged with the reflection cavity assembly, and the cover plate top surface is a semi-transparent black structure.

7. The LED display module with IP66 waterproof rating according to claim 1, wherein: A plurality of touch springs are provided between the PCB assembly and the reflective cavity assembly, and the reflective cavity assembly is provided with holes corresponding to the touch springs one by one.

8. The LED display module with IP66 waterproof rating according to claim 1, wherein: The capacitance value in the PCB assembly is 103 μF, which is 1 / 4 of the conventional capacitance value.

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