CN216849193U

CN216849193U - LED display module and LED display device with same

Info

Publication number: CN216849193U
Application number: CN202123452339.XU
Authority: CN
Inventors: 李炳锋; 樊勇军
Original assignee: Shenzhen Leyard Optoelectronic Co Ltd
Current assignee: Shenzhen Leyard Optoelectronic Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-28
Anticipated expiration: 2031-12-31

Abstract

The utility model provides a LED display module assembly and have its LED display device, wherein, LED display module assembly includes: the LED lamp panel is provided with a wiring port; the storage chip is arranged on the LED lamp panel; and the level conversion circuit is arranged on the LED lamp panel and is arranged between the wiring port and the storage chip so as to convert the signal output by the wiring port into a signal with a preset voltage value. The technical scheme of the application can effectively solve the problem that the cost is high when level conversion is realized by adopting an integrated chip in the related technology.

Description

LED display module and LED display device with same

Technical Field

The utility model relates to a LED display device technical field particularly, relates to a LED display module assembly and have its LED display device.

Background

In the related art, the LED display device includes a plurality of LED display modules, and a power box and a controller, which are connected to the plurality of LED display modules to respectively supply power to the LED display modules and transmit control signals. The LED display module comprises an LED lamp panel and a plurality of chips (including an LED chip, a driving chip, a storage chip and the like) arranged on the LED lamp panel.

Generally, the power box provides 5V dc power for the LED display module. However, the operating voltage of the memory chip on the LED lamp panel is lower than 5V, for example, 3.3V. Therefore, level conversion is required. Specifically, the 74LVCH245 chip may be used to implement level conversion, but this is costly.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a LED display module and a LED display device having the same to solve the problem of high level conversion cost of the integrated chip in the related art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a LED display module, including: the LED lamp panel is provided with a wiring port; the storage chip is arranged on the LED lamp panel; and the level conversion circuit is arranged on the LED lamp panel and is arranged between the wiring port and the storage chip so as to convert the signal output by the wiring port into a signal with a preset voltage value.

Furthermore, the level conversion circuit comprises a first voltage division element and a second voltage division element, the first voltage division element is connected with the wiring port, the second voltage division element is grounded, and the wiring terminal on the memory chip is connected between the first voltage division element and the second voltage division element.

Further, the first voltage dividing element is a first resistor, and the second voltage dividing element is a second resistor.

Further, a ratio of the resistance value of the first resistor to the resistance value of the second resistor is between 3/7 and 2/3.

Further, the number of the level shift circuits is three, and the three level shift circuits are respectively connected with the first terminal, the second terminal and the third terminal of the memory chip.

Further, the LED display module further comprises a filter circuit connected with the fourth terminal of the memory chip and the fifth terminal of the memory chip.

Furthermore, the filter circuit comprises a first filter circuit and a second filter circuit which are arranged in parallel, a first filter capacitor is arranged in the first filter circuit, a second filter capacitor is arranged in the second filter circuit, and the ratio of the capacitance value of the first filter capacitor to the capacitance value of the second filter capacitor is greater than or equal to 100.

Further, the LED display module further comprises a support and a rear cover arranged on the rear side of the support, the LED lamp panel is arranged on the front side of the support, and the storage chip, the wiring port and the level conversion circuit are arranged between the LED lamp panel and the rear cover.

According to the utility model discloses an on the other hand provides a LED display device, including a plurality of LED display module assemblies, LED display module assembly is foretell LED display module assembly.

Further, the LED display device further comprises a controller and a power box, the controller is connected with each LED display module respectively and transmits control signals to the LED display modules, and the power box is connected with each LED display module respectively and supplies power to the LED display modules.

Use the technical scheme of the utility model, LED display module assembly includes: LED lamp plate, memory chip and level conversion circuit. The working voltage of the level conversion circuit is less than 5V. The level conversion circuit is arranged between the LED lamp panel and the storage chip, and can convert signals output by the wiring port on the LED lamp panel into signals with preset voltage values, so that the storage chip can normally work. Meanwhile, the level conversion circuit is adopted to replace an integrated chip in the related technology, so that the cost can be reduced on the basis of realizing level conversion. Therefore, the technical scheme of the application can effectively solve the problem that the cost is high when the level conversion is realized by adopting the integrated chip in the related technology.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of an embodiment of an LED display device according to the present invention.

Wherein the figures include the following reference numerals:

10. an LED lamp panel; 20. a memory chip; 30. a level conversion circuit; 31. a first voltage dividing element; 32. a second voltage dividing element; 40. a filter circuit; 41. a first filter circuit; 42. a second filter circuit; 50. a controller;

r1, a first resistor; r2, a second resistor; c1, a first filter capacitor; c2 and a second filter capacitor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1, the LED display module of the present embodiment includes: the LED lamp panel 10, the memory chip 20 and the level shift circuit 30. Wherein, the LED lamp panel 10 is provided with a wiring port; the memory chip 20 is arranged on the LED lamp panel 10; the level conversion circuit 30 is disposed on the LED lamp panel 10 and between the wiring port and the memory chip 20 to convert the signal output from the wiring port into a signal with a preset voltage value.

Use the technical scheme of this embodiment, LED display module includes: the LED lamp panel 10, the memory chip 20 and the level shift circuit 30. The operating voltage of the level shift circuit 30 is less than 5V. The level shift circuit 30 is disposed between the LED lamp panel 10 and the memory chip 20, and can convert the signal output from the wiring port of the LED lamp panel 10 into a signal with a preset voltage value, so as to ensure that the memory chip 20 can work normally. Meanwhile, the level conversion circuit 30 is adopted to replace an integrated chip in the related art, so that the cost can be reduced on the basis of realizing level conversion. Therefore, the technical scheme of the embodiment can effectively solve the problem of high cost of realizing level conversion by adopting an integrated chip in the related art.

In this embodiment, the LED lamp panel 10 includes a PCB and a plurality of LED chips disposed on the front side. The front side is the side of the LED display module facing the viewer when playing the preset picture. Correspondingly, the rear side is the side far away from the viewer when the LED display module plays the preset picture.

In the present embodiment, a level shift circuit 30 is further disposed between the wiring port and the memory chip 20 to convert the signal output from the wiring port into a signal with a preset voltage value. In other possible embodiments, the level shift circuit may also be disposed between a wiring port of the LED lamp panel and other chips requiring an operating voltage less than 5V, for example, between the wiring port and the driving chip.

As shown in fig. 1, in the present embodiment, the level shift circuit 30 includes a first voltage division element 31 and a second voltage division element 32, the first voltage division element 31 is connected to the connection port, the second voltage division element 32 is grounded, and the connection terminal on the memory chip 20 is connected between the first voltage division element 31 and the second voltage division element 32. Specifically, the first voltage dividing element 31 is a first resistor R1, and the second voltage dividing element 32 is a second resistor R2. The level conversion function is realized by two resistors, the structure is simple, and the cost of the level conversion circuit 30 is low.

In the present embodiment, the ratio of the resistance value of the first resistor R1 to the resistance value of the second resistor R2 is 3/7 to 2/3. Therefore, the signal transmitted to the memory chip 20 by the wiring port is a signal equivalent to the working voltage of the memory chip 20, and the normal work of the memory chip 20 is ensured. Specifically, in the present embodiment, the operating voltage of the memory chip 20 is 3.3V, the resistance value of the first resistor R1 is 510 Ω, and the resistance value of the second resistor R2 is 1000 Ω.

As shown in fig. 1, the number of the level shift circuits 30 is three, and the three level shift circuits 30 are connected to the first terminal, the second terminal, and the third terminal of the memory chip 20, respectively. The memory chip 20 needs to store the three control signals (SPI _ CS signal, SPI _ CLK signal, and SPI _ MOSI signal) transmitted by the controller, respectively, and thus three level shift circuits are provided. The first terminal of the memory chip 20 is a CS pin for receiving the SPI _ CS signal in fig. 1, the second terminal of the memory chip 20 is a CLK pin for receiving the SPI _ CLK signal in fig. 1, and the third terminal of the memory chip 20 is a DI pin for receiving the SPI _ MOSI signal in fig. 1.

Of course, in other possible embodiments, the number of the level shift circuits and the resistance values of the voltage dividing elements in the level shift circuits may be set according to actual needs.

As shown in fig. 1, in the present embodiment, the LED display module further includes a filter circuit 40 connected to the fourth terminal of the memory chip 20 and the fifth terminal of the memory chip 20. Wherein, the first terminal of the filter circuit 40 is connected to the power supply, and the second terminal of the filter circuit 40 is respectively connected to the fourth terminal (VCC pin in fig. 1) of the memory chip 20 and the fifth terminal (HOLD pin in fig. 1) of the memory chip 20. The interference on the LED display module is relatively large, and the filter circuit 40 can perform a smooth filtering function.

The filter circuit 40 includes a first filter circuit 41 and a second filter circuit 42 that are arranged in parallel, a first filter capacitor C1 is arranged in the first filter circuit 41, a second filter capacitor C2 is arranged in the second filter circuit 42, and the ratio of the capacitance value of the first filter capacitor C1 to the capacitance value of the second filter capacitor C2 is greater than or equal to 100. Specifically, in the present embodiment, the capacitance value of the first filter capacitor C1 is 10 μ F, and the capacitance value of the second filter capacitor C2 is 0.1 μ F. The first filter circuit 41 and the second filter circuit 42 are respectively arranged, so that interference signals in different frequency ranges can be filtered, the filter effect is ensured, and the work of the memory chip 20 is more stable.

In this embodiment, the LED display module further includes a bracket and a rear cover disposed at the rear side of the bracket, the LED lamp panel 10 is disposed at the front side of the bracket, and the memory chip 20, the wiring port and the level shift circuit 30 are disposed between the LED lamp panel 10 and the rear cover. Through setting up the back cover, can avoid setting up the various components and parts of LED lamp plate rear side directly to expose outside, play the effect of the components and parts of protection LED lamp plate rear side.

The application also provides an LED display device, wherein, LED display device includes a plurality of LED display module assembly. The LED display module is the LED display module. The LED display module includes an LED lamp panel 10, a memory chip 20, and a level conversion circuit 30. The operating voltage of the level shift circuit 30 is less than 5V. The level shift circuit 30 is disposed between the LED lamp panel 10 and the memory chip 20, and can convert the signal output from the wiring port of the LED lamp panel 10 into a signal with a preset voltage value, so as to ensure that the memory chip 20 can work normally. Meanwhile, the level shift circuit 30 is used to replace the integrated chip in the related art, so that the cost can be reduced on the basis of realizing level shift, and the problem of high cost of realizing level shift by using the integrated chip in the related art can be effectively solved. Therefore, the LED display device with the LED display module also has the advantages.

In this embodiment, the LED display device further includes a controller 50 and a power box, the controller 50 is connected to each LED display module and transmits a control signal to the LED display module, and the power box is connected to each LED display module and supplies power to the LED display module.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms do not have special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a LED display module assembly which characterized in that includes:

the LED lamp panel (10), wherein a wiring port is formed in the LED lamp panel (10);

the storage chip (20) is arranged on the LED lamp panel (10);

and the level conversion circuit (30) is arranged on the LED lamp panel (10) and is arranged between the wiring port and the storage chip (20) so as to convert the signal output by the wiring port into a signal with a preset voltage value.

2. The LED display module of claim 1, wherein the level shift circuit (30) comprises a first voltage divider element (31) and a second voltage divider element (32), the first voltage divider element (31) is connected to the connection port, the second voltage divider element (32) is connected to ground, and the connection terminal of the memory chip (20) is connected between the first voltage divider element (31) and the second voltage divider element (32).

3. The LED display module according to claim 2, wherein the first voltage divider element (31) is a first resistor (R1) and the second voltage divider element (32) is a second resistor (R2).

4. The LED display module of claim 3, wherein the ratio of the resistance value of the first resistor (R1) to the resistance value of the second resistor (R2) is between 3/7 and 2/3.

5. The LED display module according to any one of claims 1 to 4, wherein the number of the level shift circuits (30) is three, and the three level shift circuits (30) are respectively connected to the first terminal, the second terminal and the third terminal of the memory chip (20).

6. The LED display module according to any of claims 1 to 4, further comprising a filter circuit (40) connected to a fourth terminal of the memory chip (20) and a fifth terminal of the memory chip (20).

7. The LED display module according to claim 6, wherein the filter circuit (40) comprises a first filter circuit (41) and a second filter circuit (42) connected in parallel, a first filter capacitor (C1) is disposed in the first filter circuit (41), a second filter capacitor (C2) is disposed in the second filter circuit (42), and a ratio of a capacitance value of the first filter capacitor (C1) to a capacitance value of the second filter capacitor (C2) is greater than or equal to 100.

8. The LED display module according to any one of claims 1 to 4, further comprising a bracket and a rear cover disposed at a rear side of the bracket, wherein the LED lamp panel (10) is disposed at a front side of the bracket, and the memory chip (20), the wiring port and the level shift circuit (30) are disposed between the LED lamp panel (10) and the rear cover.

9. An LED display device comprising a plurality of LED display modules, wherein the LED display modules are the LED display modules of any one of claims 1 to 8.

10. The LED display device of claim 9, further comprising a controller (50) and a power box, wherein the controller (50) is connected to each LED display module and transmits control signals to the LED display modules, and the power box is connected to each LED display module and supplies power to the LED display modules.