WO2019218739A1

WO2019218739A1 - Display screen mask, led display module, and led display screen

Info

Publication number: WO2019218739A1
Application number: PCT/CN2019/075704
Authority: WO
Inventors: 杨志军; 刘联现; 陈倏贤; 何昆鹏; 吴振志; 沈毅; 吴涵渠
Original assignee: 深圳市奥拓电子股份有限公司
Priority date: 2018-05-18
Filing date: 2019-02-21
Publication date: 2019-11-21
Also published as: CN108682314A

Abstract

A display screen mask (10), an LED display module, and an LED display screen. The display screen mask (10) comprises a mask substrate (110). The mask substrate (110) is provided with a plurality of lamp holes (120). When the display screen mask (10) is assembled onto an LED display module or an LED display screen, LED lamp beads pass through the lamp holes (120) so as to be exposed outside of the display screen mask (10). Snap-fit members (130) are provided on side walls of each lamp hole (120). Each snap-fit member (130) comprises a first end (130a) and a second end (130b) that are provided opposite to each other. A connection line between the first end (130a) and the second end (130b) inclines with respect to a plane where the mask substrate (110) is located. The first end (130a) is fixedly connected to the mask substrate (110), and the second end (130b) is a free end. In addition, when the display screen mask (10) is assembled onto the LED display module or the LED display screen, the second end (130b) abuts against an LED lamp bead to tightly fit with the LED lamp bead. By providing the snap-fit members (130) and tightly fitting the snap-fit members (130) with the LED lamp beads, the display screen mask (10), the LED display module, and the LED display screen prevent, by means of a pressing force and a friction force, the problem of bumps generated under high temperature when the display screen mask (10) is exposed to the blazing sun.

Description

Display mask, LED display module and LED display

Technical field

The invention relates to the field of LED display, in particular to a display screen cover, an LED display module and an LED display screen.

Background technique

With the development of the LED market, the R&D and manufacturing technology of the indoor and outdoor LED display has been perfected, and the R&D and manufacturing of the outdoor LED display has also made great progress. However, due to the complex outdoor environment, the outdoor LED display does not have the protection and shielding of the building. This requires a stronger and better protection. It is a more feasible solution to set the mask on the module. However, since the masks are usually made of flexible materials, under the sun's exposure, abnormalities such as bulging and deformation may occur, which is a problem faced by the industry at present.

In order to solve the defects such as bulging and deformation of the mask at high temperature, the current solutions include: increasing the number of screws of the module and the mask, and shortening the screw spacing to solve this problem. However, the number of screws is increased. On the one hand, since the mask threaded post is disposed on the PCB board, it is necessary to increase the number of the screw column, which will greatly increase the arrangement of the electronic components on the PCB, and on the other hand, the product will be caused. The yield is reduced.

technical problem

Based on this, it is necessary to provide a display screen mask, an LED display module and an LED display screen for the problem that the mask transmits the bulge and deformation at a high temperature.

Technical solution

A first aspect of the present invention provides a display screen cover that is mounted on an LED display module or an LED display screen to provide protection for the LED display module, including a mask base, and the mask base is provided with a plurality of light holes. When the display mask is assembled to the LED display module or the LED display, the LED lamp beads are exposed through the lamp hole to be exposed on the display screen cover, and the side wall of the lamp hole is provided with a latching member. The latching member includes a first end and a second end opposite to each other, the line connecting the first end and the second end is inclined with respect to a plane of the mask base, and the first end is fixedly connected to the mask base. The second end is a free end, and when the display screen is mounted on the LED display module or the LED display screen at the second end, the LED lamp bead is resisted to form a tight fit with the LED lamp bead.

In one embodiment, two of the latching members are disposed in each of the lamp holes, and the two latching members are oppositely disposed, and a spacing L1 between the second ends of the two latching members is less than The width L2 of the LED lamp bead, the width L3 of each of the card members is larger than the gap L4 between the LED lamp bead and the display screen cover.

In one embodiment, the latching member includes a flat portion and a sloped portion, the flat portion is fixedly coupled to the mask base, the inclined portion is fixedly coupled to the flat portion, and is inclined with respect to the flat portion The inclined portion is configured to abut the LED lamp bead.

In one embodiment, the inclined portion is made of a thermoplastic material, and when the ambient temperature exceeds a preset value, the inclined portion is completely softened, and the portion of the inclined portion that is in contact with the LED lamp bead can be attached to the LED lamp. Beads.

In one embodiment, when the display screen is mounted on the LED display module or the LED display, the connection between the first end and the second end is 15°-20° with the plane of the mask base. angle.

A second aspect of the present invention provides an LED display module, including a bottom case, a PCB board, an LED lamp bead, and a mask, wherein the PCB board is disposed on the bottom case, and the LED lamp bead array is arranged in the In the PCB board, the mask is any one of the above-mentioned display screen masks, and the LED lamp beads are exposed to the mask through the lamp holes of the mask.

In one embodiment, a fastener is further included, and the mask base is further provided with a plurality of fixing holes through which the fastener is fixedly connected to the PCB board.

In one embodiment, the fastener includes an inverted pin, one end of the inverted pin is fixedly connected to the PCB board, and the other end penetrates into the fixing hole to sleeve the mask on the bottom The pin is attached such that the mask is fixedly coupled to the PCB by the inverted pin.

In one embodiment, the potting layer is further disposed on the PCB board, and the LED lamp bead is at least partially exposed on the potting layer to realize the LED display module. Waterproof.

A third aspect of the present invention provides an LED display screen, the LED display screen includes a fixing frame, at least one LED display module, and a mask, wherein the LED display module is fixed on the fixing frame, and the mask is assembled in the In the LED display module, the mask is any of the display screens described above.

Beneficial effect

The display screen cover, the LED display module and the LED display screen are arranged by the card position member, and when the display screen cover is assembled on the LED display module or the LED display screen, a tight fit is formed between the card position piece and the LED lamp bead. The pressing force and the friction force are formed between the card position piece and the LED lamp bead to prevent the high temperature bulging problem caused by the temperature rise under the exposure environment of the display screen cover.

DRAWINGS

1 is a schematic structural view of a display screen cover according to an embodiment of the present invention;

2 is a cross-sectional structural view of a display screen cover according to an embodiment of the present invention;

3 is a schematic structural diagram of an LED display module according to an embodiment of the present invention;

4 is a schematic structural diagram of an LED display module according to still another embodiment of the present invention;

FIG. 5 is a schematic structural view of an inverted pin of an LED display module according to an embodiment of the invention.

Embodiments of the invention

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Embodiments of the present invention provide a display screen cover that is mounted on an LED display module or an LED display to provide protection for the LED display module. It should be noted that although in the full text, the display screen cover is described as being applied to a full outdoor small-pitch LED display screen, this is only because the installation environment of the full outdoor small-pitch display screen is relatively high, and the present invention can be better exhibited. The effect of the display screen cover of each embodiment can be understood that the display screen cover of the embodiments of the present invention can also be applied to a semi-outdoor display screen, an indoor display screen, and has the same effect on the basis of changing the corresponding specifications.

Referring to FIG. 1 to FIG. 2, FIG. 1 exemplarily shows a schematic structural view of a display screen cover 10 according to an embodiment of the present invention. The display screen cover 10 includes a mask base 110, and the mask base 110 is provided with a plurality of a light hole 120, when the display screen cover 10 is assembled to the LED display module or the LED display screen, the LED light bead is exposed through the light hole 120 to be exposed to the display screen cover 10, the light hole 120 The side wall is provided with a latching member 130. The latching member 130 includes a first end 130a and a second end 130b disposed opposite to each other, and a line connecting the first end 130a and the second end 130b is opposite to the mask base. The plane in which the 110 is located is inclined, the first end 130a is fixedly connected to the mask substrate 110, the second end 130b is a free end, and the display screen cover 10 is mounted on the LED display module or the LED display screen. When it is resisted by the LED lamp bead, it forms a tight fit with the LED lamp bead, so that the display screen cover 10 can be fixed by the LED lamp bead.

In a specific embodiment, the card member 130 is integrally formed with the mask substrate 110. In order to avoid damage to the LED lamp bead by the mask, the card member 130 and the mask substrate 110 are made of a flexible material such as silicone, plastic, TPU or other flexible materials.

In the one or more embodiments, two of the latching members 130 are disposed in each of the lamp holes 120, and the two latching members 130 are oppositely disposed, and the second ends of the two latching members 130 are oppositely disposed. The spacing L1 between 130b is smaller than the width L2 of the LED bead, and the width L3 of each of the clamping members 130 is greater than the gap L4 between the LED bead and the display mask 10, so that when the display mask 10 is assembled When the LED display module or the LED display screen is used, the second ends 130b of the two latching members 130 are closely pressed against the LED lamp bead, and the friction between the latching member 130 and the LED lamp bead is utilized. Force to prevent the display mask 10 from falling off the LED display module or LED display. Those skilled in the art will appreciate that three or four or more card members 130 may also be provided.

In some embodiments, the latching member 130 includes a flat portion 131 and a sloped portion 133, the flat portion 131 is fixedly coupled to the mask base 110, and the inclined portion 133 is fixedly coupled to the flat portion 131, and The inclined portion 133 is inclined with respect to the flat portion 131 in a direction away from the fitting surface of the mask base 110. The assembly surface of the mask substrate 110 is the end surface of the mask substrate 110 near the LED display module or the LED display screen when the display screen cover 10 is mounted on the LED display module or the LED display screen.

When the display screen cover 10 is mounted on the LED display module or the LED display screen, the flat portion 131 has an indirect horizontal pressing force on the LED lamp bead, and the inclined portion 133 has an LED lamp bead on the LED lamp bead. The pressing force in the horizontal direction and the frictional force in the vertical direction are fixed to the LED lamp bead by the horizontal pressing force and the vertical frictional force. It will be understood by those skilled in the art that the horizontal and vertical directions are only relative to the direction in FIG.

By providing the latching member 130 on the side wall of the lamp hole 120, the pressing force and friction between the latching member 130 and the LED lamp bead are utilized, so that the mask can be fixed by the LED lamp bead, and the mask can be prevented. The LED lamp beads are separated. When the LED display is installed outdoors and is exposed to high intensity by sunlight, the temperature of the air between the display mask 10 and the LED display module is higher than the outside air due to the sealed environment and the light reflection of the LED display module. The higher temperature causes the display screen cover 10 to have a tendency to expand and deform, and the display screen cover 10 has a tendency to detach from the LED display module under the action of thermal expansion internal stress. The pressing force and friction between the clamping member 130 and the LED lamp bead can prevent the display mask 10 from moving away from the LED display module. Due to the density of the LED bead, the display mask 10 is at each LED bead. There is friction between the card member 130 and the LED lamp bead, and thus the display screen cover 10 does not suffer from bulging due to high temperature.

In one or more embodiments, in order to strengthen the friction between the card member 130 and the LED lamp bead, the detachment of the display screen cover 10 from the LED lamp bead is prevented, and the inclined portion 133 is made of a thermoplastic material at normal temperature. The inclined portion 133 is a flexible material, and the inclined portion 133 can be completely softened as the temperature rises beyond a preset value, so that the portion of the inclined portion 133 that is in contact with the LED lamp bead can be attached to the LED lamp bead. Therefore, an adsorption force is generated between the inclined portion 133 and the LED lamp bead to achieve the purpose of enhancing the friction. Further, a plurality of friction protrusions (not shown) may be disposed on a side of the inclined portion 133 close to the lamp bead to enhance friction.

In a specific embodiment, when the display screen cover 10 is mounted on the LED display module or the LED display screen, the connection between the first end 130a and the second end 130b and the plane of the mask base 110 are 15 °~20° angle. Specifically, when the latching member 130 is not provided with the flat portion 131 and only the inclined portion 133 is disposed, after the display screen cover 10 is mounted on the LED display module or the LED display screen, the inclined portion 133 and the mask are The plane in which the substrate 110 is located has an angle of 15° to 20°. When the latching member 130 is provided with the flat portion 131 and the inclined portion 133, the line connecting the ends of the flat portion 131 and the inclined portion 133 away from each other is 15° with the plane of the mask base 110. ~20 ° angle. The angle between the line connecting the first end 130a and the second end 130b and the plane of the mask substrate 110 is set to 15°-20°, so that the display screen cover 10 can pass the card member 130 and the LED lamp. The cooperation of the beads achieves fastening, preventing the display mask 10 from bulging due to high temperature, and facilitating the disassembly of the display mask 10, so that the engagement between the card member 130 and the LED lamp bead is not too tight, so that the display mask is The disassembly has become difficult.

The display screen cover 10 is provided with a latching member 130. When the display screen cover 10 is mounted on the LED display module or the LED display screen, a tight fit is formed between the latching member 130 and the LED lamp bead, and the latching member 130 is A pressing force and a friction force are formed between the LED lamp beads to prevent the high temperature bulging problem caused by the temperature rise in the display mask 10 in an exposure environment.

Referring to FIG. 3 and FIG. 4 , an LED display module 20 is further provided. The LED display module 20 includes a bottom case 210 , a PCB board 220 , an LED lamp bead 230 , and a mask 240 . The panel 220 is disposed on the bottom case 210. The LED lamp bead 230 is arranged on the PCB board 220. The mask 240 is the display screen cover 240 of any of the above embodiments. The lamp bead 230 is exposed through the lamp hole of the mask 240 to the mask 240.

In some embodiments, the LED display module 20 further includes a fastener (not labeled) that secures the mask 240 to the PCB board 220. As shown in Figure 3, in a particular embodiment, the fastener can be a screw.

The mask base of the mask 240 is further provided with a plurality of fixing holes 241 (refer to FIG. 4), the fixing holes 241 are disposed between the adjacent four lamp holes, and the fastener passes through the fixing holes. The mask 240 is fixedly coupled to the PCB board 220.

Referring to FIG. 4, in one or more embodiments, the fastener includes an inverted pin 250, the inverted pin 250 is fixed on the PCB board 220, and the mask 240 passes the inverted pin 250 is fixedly coupled to the PCB board 220. Referring to FIG. 5, the inverted pin 250 includes an oppositely disposed head portion 251 and a tail portion 253. The cross-sectional width D1 of the head portion 251 is smaller than the cross-sectional width D2 of the tail portion 253, and the corresponding portion on the PCB board 220 The fixing hole 241 and the inverted pin 250 are provided with perforations, and the head 251 of the inverted pin 250 passes through the perforation from the side of the PCB board 220 facing away from the LED lamp bead 230, and enters the In the fixing hole 241 of the mask 240, the mask 240 is sleeved on the head 251, and the tail portion 253 abuts and is fixed to a side of the PCB board 220 facing away from the LED lamp bead 230, thereby The mask 240 is fixed to the PCB board 220 by the inverted pin 250.

The mask 240 is fixed to the head 251 of the inverted pin 250 by being sleeved and snap-fitted, and is fixed without the use of screws or other parts. The mask 240 is fixed by snapping, and the head 251 of the inverted pin 250 is abutted against the side of the PCB 220 facing away from the LED lamp bead 230, which can be avoided by fixing the mask 240 by screws. Damage to the LED bead 230 when the mask 240 is fixed.

In some embodiments, the head portion 251 is provided with an annular groove 255 disposed along the circumferential direction of the head portion 251, and the diameter of the fixing hole 241 is smaller than the cross section of the head portion 251. Width, such that when the head 251 penetrates the fixing hole 241 of the mask 240, the head 251 forms a tight fit with the mask 240, and finally the mask 240 is sleeved under the action of an external force. The position of the head 251 corresponding to the annular groove 255.

The annular groove 255 is disposed at an end of the head portion 251 away from the tail portion 253. According to the position of the annular groove 255, the head portion 251 includes a first portion 2511, a second portion 2513, and a third portion. a portion 2515, the first portion 2511 is a portion of the head portion 251 between the annular groove 255 and the tail portion 253, and the second portion 2513 is a portion corresponding to the annular groove 255. The third portion 2515 is a portion of the head portion 251 away from the tail portion 253, and the first portion 2511 and the third portion 2515 are respectively located on opposite sides of the annular groove 255, are oppositely disposed, and pass through The second portion 2513 is connected. The fixing hole 241 of the mask 240 has a smaller diameter than the first portion 2511 and the third portion 2515 and is sleeved on the outer edge of the second portion 2513. The diameter of the fixing hole 241 may be smaller than the cross-sectional width of the second portion 2513 or larger than the cross-sectional width of the second portion 2513 as long as the mask 240 can be sleeved on the second portion 2513. In a specific embodiment, in order to facilitate the assembly of the mask 240, the head portion 251 is cylindrical, and the first portion 2511, the second portion 2513, and the third portion 2515 may each correspond to a cylindrical shape. The cross-sectional width of the second portion 2513 and the third portion 2515 is the diameter of the corresponding portion.

After the mask 240 is sleeved on the outer circumference of the second portion 2513, the first portion 2511 is covered by the mask 240, and the third portion 2515 is exposed to the mask 240 such that the third portion 2515 approximates a stud in appearance.

When the mask 240 is inserted into the annular groove 255, the head 251 of the inverted pin 250 is first aligned with the fixing hole 241. At this time, since the cross-sectional width of the third portion 2515 is larger than the diameter of the fixing hole 241, Therefore, the mask 240 cannot be inserted into the third portion 2515. Under the action of the external force, the third portion 2515 penetrates into the fixing hole 241, and the mask 240 transmits deformation and is sleeved on the outer edge of the third portion 2513, and the external force continues. The mask 240 enters the annular groove 255 along the third portion 2515 and is sleeved on the outer edge of the second portion 2513, that is, the mask 240 and the inverted pin 250 are fixed. A tight fit is formed between the piece and the LED bead 230. During the fixing process of the mask 240, the inverted pin 250 generates a blocking force for the mask 240, and the direct acting object of the external force is also the mask 240, that is, during the fixing process of the mask 240, the PCB board 220 is not directly stressed. Compared with the way of fixing the mask 240 by screws, since the screw is screwed down, a continuous force is generated on the PCB board 220, and during the screwing process, once the screw is misaligned, the LED lamp bead 230 may be damaged, and the pin is broken. 250 fixing the mask 240 can avoid damage to the lamp bead during the assembly process of the mask 240. When the external force acts on the mask 240, the force can be applied corresponding to the gap of the LED, and the simple downforce is more convenient to control than the rotational force. In some embodiments, in order to facilitate the positioning of the mask 240 and the inverted pin 250, the third portion 2515 is provided with a slope at an end away from the annular groove 255.

In a specific embodiment, a side of the PCB board 220 facing away from the LED lamp bead 230 is provided with a pad 221 at a periphery of the through hole, and the tail portion 253 is soldered to the pad 221, thereby The inverted pin 250 is fixed to the PCB board 220.

In a specific embodiment, the inverted pin 250 is made of stainless steel, and has strong rigidity and is not easy to rust. Further, in order to reduce the friction between the inverted pin 250 and the mask 240, the surface of the inverted pin 250 may also be subjected to a nickel plating treatment.

In some embodiments, the LED display module 20 further includes a potting layer 260. The potting layer 260 is disposed on the PCB board 220, and the LED lamp bead 230 is at least partially exposed to the filling. Sealing layer 260. By providing the potting layer 260, moisture can be prevented from entering the PCB board 220, and the waterproof performance of the LED display module 20 is enhanced.

In the embodiment provided with the potting layer 260, the inverted pin 250 is first fixed on the PCB board 220, and then the glue is applied on the PCB board 220.

The invention also provides an LED display screen, the LED display screen comprises a fixing frame, at least one LED display module and a mask, the LED display module is fixed on the fixing frame, and the mask is assembled on the LED In the display module, the mask is the display screen cover of any of the above embodiments.

In a specific embodiment, the LED display module is the LED display module of any of the above embodiments.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A display screen cover, which is mounted on an LED display module or an LED display screen to provide protection for the LED display module, and is characterized in that it comprises a mask base, and the mask base is provided with a plurality of light holes when the display When the screen cover is assembled to the LED display module or the LED display screen, the LED lamp bead is exposed through the lamp hole to expose the display screen cover, and the side wall of the lamp hole is provided with a latching member, the card position The member includes oppositely disposed first ends and second ends, the line connecting the first end and the second end being inclined with respect to a plane of the mask base, the first end being fixedly coupled to the mask base, The second end is a free end, and when the display mask is mounted on the LED display module or the LED display screen at the second end, the LED lamp bead is resisted to form a tight fit with the LED lamp bead.
The display screen cover according to claim 1, wherein two of the latching members are disposed in each of the lamp holes, and the two latching members are oppositely disposed, and the two of the latching members are The distance L1 between the two ends is smaller than the width L2 of the LED lamp bead, and the width L3 of each of the card members is larger than the gap L4 between the LED lamp bead and the display screen cover.
The display screen cover according to claim 1, wherein the latching member comprises a flat portion and a slope portion, the flat portion is fixedly coupled to the mask base, and the inclined portion is fixedly coupled to the flat portion And being inclined with respect to the flat portion, the inclined portion is for abutting the LED lamp bead.
The display screen cover according to claim 3, wherein the inclined portion is made of a thermoplastic material, and the inclined portion is completely softened when the ambient temperature exceeds a preset value, and the inclined portion is in contact with the LED lamp bead. The part can be attached to the LED lamp bead.
The display screen cover according to claim 1, wherein when the display screen is mounted on the LED display module or the LED display, the connection between the first end and the second end and the surface of the mask substrate The plane is at an angle of 15 ° ~ 20 °.
An LED display module, comprising: a bottom case, a PCB board, an LED lamp bead and a mask, wherein the PCB board is disposed on the bottom case, and the LED lamp bead array is arranged on the PCB board The mask is the display screen cover of any one of claims 1 to 5, and the LED lamp beads are exposed to the mask through the lamp hole of the mask.
The LED display module according to claim 6, further comprising a fastener, wherein the mask base is further provided with a plurality of fixing holes, and the fastener passes through the fixing hole to fix the mask Connected to the PCB board.
The LED display module according to claim 7, wherein the fastener comprises an inverted pin, one end of the inverted pin is fixedly connected to the PCB board, and the other end is inserted into the fixing hole so that The mask is sleeved on the inverted pin, so that the mask is fixedly connected to the PCB through the inverted pin.
The LED display module of claim 6 further comprising a potting layer, the potting layer being disposed on the PCB, the LED bead being at least partially exposed to the potting The glue layer is used to achieve waterproofing of the LED display module.
An LED display screen, comprising: a fixing frame, at least one LED display module and a mask, wherein the LED display module is fixed on the fixing frame, and the mask is mounted on the LED display module The mask is the display screen cover of any of claims 1-5.