CN219046226U

CN219046226U - LED display screen

Info

Publication number: CN219046226U
Application number: CN202222545646.0U
Authority: CN
Inventors: 汤仁君; 李阳; 王训; 王祥国; 刘世良
Original assignee: Shenzhen Zhouming Technology Co Ltd
Current assignee: Shenzhen Zhouming Technology Co Ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-05-19
Anticipated expiration: 2032-09-26

Abstract

The application provides an LED display screen, be in including drain pan, PCB board and setting a plurality of lamp pearls on the PCB board, further include temperature control subassembly, temperature control subassembly is including generating heat piece, temperature-sensing ware, temperature controller, the temperature controller with generate heat the piece temperature-sensing ware electric connection, the temperature controller is used for according to temperature-sensing ware senses the temperature control of PCB board the piece that generates heat the action of rising temperature, the piece that generates heat has relative first terminal surface and the second terminal surface that sets up, first terminal surface with the PCB board contact, the second terminal surface with the drain pan contact. The LED display screen provided by the application can enable the temperature of the PCB low-temperature area to be approximately consistent with the temperature of the PCB high-temperature area, reduce the temperature difference of each area of the LED display screen, enable the display brightness of the LED display screen to be approximately consistent, and improve the customer experience degree.

Description

LED display screen

Technical Field

The application relates to the technical field of display screens, in particular to an LED display screen.

Background

In addition to the increase in demand in recent years, the market demands for LED display technology and display effect are increasing.

Because the characteristic of LED lamp pearl, operating temperature is higher the lower luminous efficacy of LED lamp pearl, so operating temperature is higher the darker luminance that LED lamp pearl presented. When the current LED display screen works, the peripheral area of the display screen can be seen to have obvious bright lines under the white balance condition, and the temperature of the peripheral LED lamp beads is lower than that of the LED lamp beads in the central area, so that the display brightness of the display screen is inconsistent.

Disclosure of Invention

Based on the above, the technical problems to be solved by the application are as follows: how to adjust the temperature difference of the lamp beads when the LED display screen works.

To achieve the above-mentioned purpose, this application embodiment provides an LED display screen, is in including drain pan, PCB board and setting a plurality of lamp pearls on the PCB board, and is further including accuse temperature subassembly, accuse temperature subassembly is including generating heat piece, temperature-sensing ware, temperature controller, the temperature controller with generate heat piece temperature-sensing ware electric connection, the temperature controller is used for according to temperature-sensing ware senses the temperature control of PCB board the piece generates heat and intensifies the action, the piece that generates heat has the first terminal surface and the second terminal surface of relative setting, first terminal surface with the PCB board contact, the second terminal surface with the drain pan contact.

In one embodiment, the heating element is in contact with a low-temperature region of the PCB, where the low-temperature region is a region where the temperature of the PCB is lower than a first preset value when the PCB is in a working state.

In one embodiment, the heating element is embedded on the PCB board.

In one embodiment, the heat generating element is embedded on the bottom shell.

In one embodiment, the at least two temperature sensors are respectively arranged in a low temperature area and a high temperature area of the PCB board, the low temperature area is located at the periphery of the high temperature area, and the high temperature area is an area with a temperature higher than a second preset value when the PCB board is in a working state.

In one embodiment, the low temperature zone includes a first low temperature zone, a second low temperature zone; the first low temperature region is located at the periphery of the second low temperature region.

In one embodiment, the heating element comprises a first heating element and a second heating element; the first low-temperature area is provided with the first heating element, and the second low-temperature area is provided with the second heating element.

In one embodiment, the heating element is at least one selected from nichrome wire, iron-chromium-aluminum alloy wire, silica gel heating element and PTC heating element.

In one embodiment, the temperature control assembly further comprises a refrigerating piece, the refrigerating piece is in contact with the high temperature area of the PCB, the temperature controller is electrically connected with the refrigerating piece and the temperature sensor, and the temperature controller is used for controlling the refrigerating and cooling actions of the refrigerating piece according to the temperature sensed by the temperature sensor.

In one embodiment, the refrigerating element is embedded on the bottom shell.

The embodiment of the application provides an LED display screen, through setting up accuse temperature subassembly, adjusts the temperature in PCB board low temperature zone and PCB board high temperature zone, makes lamp pearl bulk temperature approach unanimous, and then the holistic display brightness of LED display screen is unanimous, and then improves user's experience degree.

Drawings

The advantages and implementations of the present application will become more apparent from the detailed description set forth below when taken in conjunction with the drawings, wherein the showings are for the purpose of illustrating the application only and not for the purpose of limiting the same in any way, and wherein:

fig. 1 is a schematic structural diagram of an LED display screen according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an LED display screen according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a temperature control assembly according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of an LED display screen according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of an LED display screen with a heating wire disposed on a bottom case according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a second temperature control component according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a temperature control assembly according to an embodiment of the present application.

Reference numerals:

the LED lamp comprises a 10-PCB board, 11-first end faces, 12-second end faces, 13-lamp beads, 14-driving ICs, 15-bottom cases, 16-high temperature areas, 17-first low temperature areas, 18-second low temperature areas, 19-low temperature areas, 20-temperature control components, 21-heating elements, 22-first end faces of heating elements, 23-second end faces of heating elements, 24-temperature sensors, 25-temperature controllers, 26-power supplies, 27-first heating elements, 28-second heating elements and 29-refrigerating elements.

Detailed Description

In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "inner," "outer," "top," "bottom," and the like are used for convenience in describing and simplifying the present application based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected at a first end; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

Example 1

As shown in fig. 1, the application provides an LED display screen, which includes a PCB board 10, a lamp bead 13, a driving IC14, a bottom case 15, and a temperature control assembly 20. The plurality of lamp beads 13 are disposed on the first end face 11 of the PCB 10, the driving IC14 is disposed on the second end face 12 of the PCB 10, and the first end face 11 and the second end face 12 are respectively opposite sides of the PCB.

The PCB board 10 is mounted on the bottom chassis 15, and the driving IC14 is accommodated in the bottom chassis 15. In a specific implementation, the PCB board 10 may be connected to the bottom case 15 by magnetic attraction, screws, or the like.

When the LED display screen works, since some areas of the PCB 10 are directly contacted with the bottom case 15, and some areas are not contacted with the bottom case 15, and the heat generated when the PCB 10 and the driving IC14 work is conducted to the bottom case 15, the temperature of the area contacted with the bottom case 15 of the PCB 10 is lower than that of other areas not contacted with the bottom case 10. As shown in fig. 2, the present application accordingly marks a low temperature region 19 and a high temperature region 16 on the PCB board 10, and the low temperature region 19 is located at the periphery of the high temperature region. The low temperature region 19 is a region with a temperature lower than a first preset value when the PCB 10 is in an operating state, and the high temperature region 16 is a region with a temperature higher than a second preset value when the PCB 10 is in an operating state. Wherein the first preset value is smaller than the second preset value. Specific numerical values of the first preset value and the second preset value need to be set according to different PCB designs and sizes, and are not uniform.

Referring to fig. 3, the temperature control assembly 20 includes a heating element 21, a temperature sensor 24, and a temperature controller 25. The temperature controller 25 is electrically connected with the heating element 21 and the temperature sensors 24, and at least two temperature sensors 24 are respectively disposed in the low temperature area 19 and the high temperature area 16 of the PCB board 10. The temperature controller 25 is used for controlling the heating element 21 to heat and raise temperature according to the temperature sensed by the temperature sensor 24, the heating element 21 is provided with a first end surface 22 and a second end surface 23 which are oppositely arranged, the first end surface 22 is contacted with the PCB 10, and the second end surface 23 is contacted with the bottom shell 15.

The temperature controller 25 adjusts the current of the heating element 21 by reading the induction temperature of the inductor 24, and the first end face 22 of the heating element 21 is in contact with the low-temperature area 16 of the PCB 10, so that the temperature of the low-temperature area of the PCB 10 is nearly consistent with the temperature of other areas of the PCB 10 under different conditions, the temperature uniformity of the whole lamp panel is ensured, and the color of the LED display screen is more uniform under the white balance condition.

Example 2

As shown in fig. 2, the PCB 10 is divided into a low temperature area 19 and a high temperature area 16 according to the temperature of the PCB 10 in the working state, and the low temperature area 19 is located at the periphery of the high temperature area. More specifically, the low temperature region 19 refers to a region having a temperature lower than a first preset value when the PCB 10 is in an operating state, and the high temperature region 16 refers to a region having a temperature higher than a second preset value when the PCB 10 is in an operating state. Wherein the first preset value is smaller than the second preset value. Specific numerical values of the first preset value and the second preset value need to be set according to different PCB designs and sizes, and are not uniform.

Referring to fig. 3, the temperature control assembly 20 includes a heating element 21, a temperature sensor 24, and a temperature controller 25. The temperature controller 25 is electrically connected with the heating element 21 and the temperature sensors 24, and at least two temperature sensors 24 are respectively disposed in the low temperature area 19 and the high temperature area 16 of the PCB board 10. The temperature controller 24 is used for controlling the heating element 21 to heat and raise temperature according to the temperature sensed by the temperature sensor 24, the heating element 21 is provided with a first end surface 22 and a second end surface 23 which are oppositely arranged, the first end surface 22 is contacted with the PCB 10, and the second end surface 23 is contacted with the bottom shell 15.

In this embodiment, as shown in fig. 1 and 2, the heating element 21 is embedded on the second end face 12 of the PCB 10 and contacts the low temperature region 19 of the PCB 10. Since the housing 15 is in contact with only the periphery of the PCB 10, the heat generating member is also disposed around the periphery of the PCB. At this time, the power supply line of the temperature control assembly 20 may be directly designed on the PCB board 10. The heating element can be at least one selected from nickel-chromium alloy wires, iron-chromium-aluminum alloy wires, silica gel heating elements and PTC heating elements.

Example 3

Referring to fig. 3, the temperature control assembly 20 includes a heating element 21, a temperature sensor 24, and a temperature controller 25. The temperature controller 25 is electrically connected with the heating element 21 and the temperature sensor 24, the temperature sensor 24 is used for controlling the heating element 21 to heat and raise temperature according to the temperature sensed by the temperature sensor 24 to the temperature of the PCB board 10, the heating element 21 has a first end surface 22 and a second end surface 23 which are oppositely arranged, the first end surface 22 is in contact with the PCB board 10, and the second end surface 23 is in contact with the bottom shell 15.

As shown in fig. 4, the PCB 10 is divided into a low temperature area and a high temperature area 16 according to the temperature of the PCB 10 in the operating state, and the low temperature area is located at the periphery of the high temperature area 19. The low temperature region refers to a region where the temperature of the PCB 10 is lower than a first preset value when the PCB 10 is in an operating state, and the high temperature region refers to a region where the temperature of the PCB 10 is higher than a second preset value when the PCB is in an operating state. Wherein the first preset value is smaller than the second preset value. Specific numerical values of the first preset value and the second preset value need to be set according to different PCB designs and sizes, and are not uniform.

In this embodiment, the low temperature region includes a first low temperature region 17 and a second low temperature region 18; the first low temperature region 17 is distributed at the periphery of the second low temperature region 18. The first low temperature region 17 is a region where the PCB board 10 is in direct contact with the bottom case 15, and the second low temperature region 18 may be adjacent to the first low temperature region 17 or a region between the first low temperature region 17 and the high temperature region 16. Accordingly, the heat generating member 21 includes a first heat generating member 27, a second heat generating member 28; the first low temperature region 17 is provided with a first heat generating element 27 and the second low temperature region 18 is provided with a second heat generating element 28. The first heating element 27 and the second heating element 28 are at least one selected from nichrome wires, iron-chromium-aluminum alloy wires, silica gel heating elements and PTC heating elements. More specifically, the first heating element 27 and the second heating element 28 may be made of different materials, or may be made of the same material with different thickness or different number, so that the first low temperature area and the second low temperature area have the same temperature rising speed, and the overall temperature of the LED display screen is more uniform.

Example 4

As shown in fig. 5, the application provides an LED display screen, which includes a PCB board 10, a lamp bead 13, a driving IC14, a bottom case 15, and a temperature control assembly 20. The plurality of lamp beads 13 are disposed on the first end face 11 of the PCB 10, the driving IC14 is disposed on the second end face 12 of the PCB 10, and the first end face 11 and the second end face 12 are respectively opposite sides of the PCB.

Referring to fig. 2, the PCB board 10 is divided into a low temperature region 19 and a high temperature region 16 according to the temperature of the PCB board 10 in the working state, and the low temperature region 19 is located at the periphery of the high temperature region. More specifically, the low temperature region 19 refers to a region having a temperature lower than a first preset value when the PCB 10 is in an operating state, and the high temperature region 16 refers to a region having a temperature higher than a second preset value when the PCB 10 is in an operating state. Wherein the first preset value is smaller than the second preset value. Specific numerical values of the first preset value and the second preset value need to be set according to different PCB designs and sizes, and are not uniform.

As shown in fig. 6, the temperature control assembly 20 includes a heat generating member 21, a temperature sensor 24, a temperature controller 25, and a power supply 26. The temperature controller 25 is electrically connected with the heating element 21 and the temperature sensors 24, and at least two temperature sensors 24 are respectively disposed in the low temperature area 19 and the high temperature area 16 of the PCB board 10. The temperature controller 24 is used for controlling the heating element 21 to heat and raise temperature according to the temperature sensed by the temperature sensor 24, the heating element 21 is provided with a first end surface 22 and a second end surface 23 which are oppositely arranged, the first end surface 22 is contacted with the PCB 10, and the second end surface 23 is contacted with the bottom shell 15.

In this embodiment, the heating element 21 is embedded on the housing 15 and at least partially contacts the PCB 10. More specifically, the heat generating member 15 is provided at the junction of the case 15 and the PCB board 10. The power supply 26 is electrically connected to the heat generating element 21, and is used for supplying power to the heat generating element 21 to heat the heat generating element 21.

Example 5

On the basis of any one of the embodiments, as shown in fig. 5 and 7, the application provides an LED display screen, which includes a PCB board 10, a lamp bead 13, a driving IC14, a bottom case 15, and a temperature control assembly. The temperature control assembly comprises a heating element 21, a temperature sensor 24 and a temperature controller 25.

In this embodiment, the temperature control assembly further includes a cooling element 29, the cooling element 29 contacts the high temperature area 16 of the PCB board 10, the temperature controller 25 is electrically connected with the cooling element 29 and the temperature sensor 24, and the temperature controller 25 is used for controlling the cooling element 29 to cool according to the temperature sensed by the temperature sensor 24 to the temperature of the PCB board 10. In particular embodiments, the cooling element 26 may be embedded directly in the bottom shell 15.

In another embodiment of the present application, the cooling element 26 may be at least one heat conducting column, where one end surface of the heat conducting column contacts the high temperature area of the PCB board 10, and the other end surface contacts the bottom shell 15, so that heat in the high temperature area can be dispersed to the bottom shell 15 through the heat conducting column. In particular embodiments, the temperature-guiding column may be integrally formed with the bottom case 15. When there are a plurality of heat conducting columns, the plurality of heat conducting columns may be disposed on the bottom case 15 in an array manner.

The application provides an LED display screen sets up the temperature control subassembly between PCB board and drain pan, makes the temperature rise in PCB board low temperature district, reduces the temperature difference between its and the PCB board high temperature district to keep lamp pearl whole temperature to approach unanimously, make the holistic display brightness of LED display screen unanimous, bring good experience for the user.

While the preferred embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art will appreciate that many modifications are possible in carrying out the present application without departing from the scope and spirit of the present application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment. The foregoing is merely illustrative of the presently preferred embodiments of the present application and is not intended to limit the scope of the claims hereof, as long as the equivalent variations of the present application using the description and drawings are included within the scope of the claims hereof.

Claims

1. The utility model provides a LED display screen, includes drain pan, PCB board and sets up a plurality of lamp pearls on the PCB board, its characterized in that, further includes temperature control subassembly, temperature control subassembly is including generating heat piece, temperature-sensing ware, temperature controller, the temperature controller with generate heat the piece temperature-sensing ware electric connection, the temperature controller is used for according to temperature-sensing ware senses the temperature control of PCB board the piece that generates heat the action of rising temperature, the piece that generates heat has relative first terminal surface and the second terminal surface that sets up, first terminal surface with the PCB board contact, the second terminal surface with the drain pan contact.

2. The LED display screen of claim 1, wherein the heat generating element is in contact with a low temperature region of the PCB, the low temperature region being a region having a temperature lower than a first preset value when the PCB is in an operating state.

3. The LED display screen of claim 2, wherein the heat generating component is embedded on the PCB board.

4. The LED display of claim 2, wherein the heat generating element is embedded on the bottom case.

5. The LED display screen of claim 3 or 4, wherein the at least two temperature sensors are respectively disposed in a low temperature area and a high temperature area of the PCB board, the low temperature area is located at the periphery of the high temperature area, and the high temperature area is an area with a temperature higher than a second preset value when the PCB board is in a working state.

6. The LED display screen of claim 5, wherein the low temperature zone comprises a first low temperature zone, a second low temperature zone; the first low temperature region is located at the periphery of the second low temperature region.

7. The LED display screen of claim 6, wherein the heat generating component comprises a first heat generating component, a second heat generating component; the first low-temperature area is provided with the first heating element, and the second low-temperature area is provided with the second heating element.

8. The LED display screen of claim 7, wherein the heat generating element is selected from at least one of nichrome wire, iron-chromium-aluminum alloy wire, silicone heat generating element, PTC heat generating element.

9. The LED display screen of claim 1, wherein the temperature control assembly further comprises a cooling element, the cooling element is in contact with the high temperature region of the PCB, the temperature controller is electrically connected with the cooling element and the temperature sensor, and the temperature controller is used for controlling the cooling element to cool according to the temperature sensed by the temperature sensor.

10. The LED display of claim 9, wherein the cooling element is embedded in the bottom case.