LED cinema screen

Abstract

The present application relates to an LED cinema screen. The present application relates to the field of LED display technology, and in particular to an LED cinema screen. An LED cinema screen includes a power supply, a display module, a structural frame, and a control circuit board; the power supply and the control circuit board are arranged on the back of the display module, the display module is arranged in the structural frame to form an LED display box, and several of the LED display boxes are spliced ​​and assembled to form the LED cinema screen, and the LED display box includes an upper box and a lower box; the control circuit board controls the connection of the LED display box, and the power supply is connected to the control circuit board. The number of power supplies used in the unit box of the present application is reduced, which can reduce the cost of the power supply and make the structural space of the box more surplus.

Description

Technical Field

[0001] The present application relates to the field of LED display technology, and in particular to an LED cinema screen. Background Art

[0002] With the development of information technology, LED displays, with their seamless splicing and excellent color reproduction, are now being used not only in billboards, conference rooms, and high-speed rail stations, but also in stages, exhibition halls, and studios. As the application of LED displays expands, LED display manufacturers are also beginning to enter the cinema and theater market.

[0003] LED displays are increasingly widely used, and different applications often have different requirements. For theaters and theaters, in addition to meeting cinema display standards, the display system also requires higher stability. Highly reliable, trouble-free products are highly favored by users. For LED cinema screens, power system reliability is the most critical aspect of the entire product, so improving the reliability of the LED cinema screen's power supply system is crucial.

[0004] The existing solution is to install two (or more) power supplies in each unit cabinet, with these power supplies acting as backup for each other. However, this conventional power backup solution requires sufficient space in the cabinet to accommodate multiple power supplies, which places demands on the cabinet structure and is costly. As the dot pitch of LED cinema screens decreases, the cabinet size and space are also shrinking, making conventional power backup solutions no longer suitable. Summary of the Invention

[0005] Based on this, it is necessary to provide an LED cinema screen to address the problem that the existing LED cinema display cabinet power backup solution is not friendly to the structural space of the cabinet.

[0006] In the first aspect, an embodiment of the present application provides an LED cinema screen, comprising a power supply, a display module, a structural frame, and a control circuit board; the power supply and the control circuit board are arranged on the back of the display module, the display module is arranged in the structural frame to form an LED display box, and several of the LED display boxes are spliced ​​and assembled into the LED cinema screen, and the LED display box includes an upper box and a lower box; the control circuit board controls the connection of the LED display box, and the power supply is connected to the control circuit board.

[0007] In some embodiments, each of the LED display boxes except the first and last ones is equipped with a power supply.

[0008] In some embodiments, the LED box initially cascaded and assembled in the LED cinema screen includes two power supplies: an upper power supply and a lower power supply; and the last LED box includes two power supplies: a front power supply and a rear power supply.

[0009] In some embodiments, the control circuit board further includes an upper control circuit board and a lower control circuit board.

[0010] In some embodiments, the upper control circuit board controls the connection to the upper box, and the lower control circuit board controls the connection to the lower box.

[0011] In some embodiments, the upper control circuit board and the lower control circuit board are connected to the power supply.

[0012] In some embodiments, the power supplies in adjacent LED display boxes are connected to each other.

[0013] In some embodiments, in adjacent LED display boxes, the lower control circuit board in the upper LED display box is connected to the upper control circuit board in the lower LED display box.

[0014] In some embodiments, in the LED box that is initially cascaded and assembled, the upper power supply is connected to the upper control circuit board and the lower control circuit board, and the lower power supply is connected to the lower control circuit board and the upper power supply.

[0015] In some embodiments, in the last LED box, the rear power supply is connected to the upper control circuit board and the lower control circuit board, and the front power supply is connected to the rear power supply and the upper control circuit board.

[0016] Compared with the prior art, the beneficial effects of the present invention are: different from the prior art, the LED cinema screen provided by the embodiment of the present application, by setting two power supplies in the first and last two LED display boxes, and setting one power supply in the remaining boxes, and setting a control circuit board, the number of power supplies used by the entire LED cinema screen is reduced, the cost is reduced, and the size of the entire box and the structural space of the cinema screen can be compressed, making it lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without inventive work. One or more embodiments are exemplified by the corresponding drawings. These exemplifications do not constitute a limitation of the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a scale limitation.

[0018] Figure 1 A schematic diagram of the connection between LED display boxes provided in one embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structural connection within the first cascaded LED display box provided in one embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structural connection inside the last LED display box of the cascade provided in one embodiment of the present application;

[0021] Figure 4 A circuit diagram of a control circuit board provided in accordance with one embodiment of the present application. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Please Figures 1 to 3 For reference, the present invention provides an LED cinema screen, comprising a power supply 15, a display module 2, a structural frame, and a control circuit board. The control circuit board further comprises an upper control circuit board 13 and a lower control circuit board 14. The power supply 15 and the control circuit board are disposed on the back of the display module. The display module is disposed within the structural frame to form an LED display housing 10. Several of these LED display housings are assembled to form the LED cinema screen. The LED display housing comprises an upper housing 11 and a lower housing 12. The control circuit board controls and connects to the LED display housings, and the power supply is connected to the control circuit board. The upper control circuit board 13 and the lower control circuit board 14 are connected to the power supply 15.

[0027] Specifically, each LED display cabinet, except for the first and last, is equipped with a power supply. The LED cabinet 30 initially assembled in the LED theater screen includes two power supplies: an upper power supply 33 and a lower power supply 34. The final LED cabinet 40 includes two power supplies: a front power supply 43 and a rear power supply 44. The upper control circuit board 33 controls the connection to the upper cabinet 31, while the lower control circuit board 34 controls the connection to the lower cabinet 32. Furthermore, the power supplies (power supply 15 and power supply 25) in adjacent LED display cabinets are interconnected.

[0028] Specifically, in adjacent LED display boxes, the lower control circuit board 14 in the upper LED display box 10 is connected to the upper control circuit board 23 in the lower LED display box 20. In the first LED box 30 assembled in cascade, the upper power supply 35 connects the upper control circuit board 33 and the lower control circuit board 34, and the lower power supply 36 connects the lower control circuit board 34 and the upper power supply 35. In the last LED box 40, the rear power supply 46 connects the upper control circuit board 43 and the lower control circuit board 44, and the front power supply 45 connects the rear power supply 46 and the upper control circuit board 43.

[0029] For example, a power supply is installed in each LED cinema screen unit cabinet. The structures of cabinets 1, 2, and 3 are the same. Take cabinet 1 as an example: it is divided into upper and lower parts. A DC power supply is connected between the control circuit board of cabinet 1 and the control circuit board of cabinet 2. A DC power supply is connected between the control circuit board of cabinet 3 and the control circuit board of cabinet 2. When the power supply of cabinet 2 fails, the control circuit of the control circuit board of cabinet 2 will cut off the connection with cabinet 2, and at the same time, the control circuit board of cabinet 2 will quickly connect with the control circuit board of cabinet 1. Thereby, the lower half of cabinet 2 can still display normally. Similarly, the control circuit of the control circuit board of cabinet 2 will cut off the connection with cabinet 2, and at the same time, the control circuit board of cabinet 2 will quickly connect with the control circuit board of cabinet 3. Thereby, the upper half of cabinet 2 can still display normally. In this way, even if the power supply of cabinet 2 fails, the normal operation of cabinet 2 can be guaranteed. In addition to processing and transferring digital signals, the control circuit board also has the function of transferring the DC power supply to the display module. In addition, the embodiment of the present application adds a power output control circuit to the circuit of the control circuit board.

[0030] See also Figure 4 The circuit principle of the control circuit board is as follows: the power interface JW1 is connected to the power supply of the current box, and JW2 is connected to the control circuit board of the cascade box. When the power supply of the current box is working normally, the emitter of the NPN transistor Q3 outputs a high level, and the emitter of Q3 is connected to the gate of the field effect tube Q1, thereby controlling the drain and source of the field effect tube Q1 to be turned on. After the current passes through Q1, the box is powered and the box starts to work.

[0031] If the power supply of the current unit box fails and the power supply has no DC voltage output, Q1 will not conduct. The collector and emitter of PNP transistor Q4 will conduct, thereby controlling the collector and emitter of Q5 to conduct, and then controlling the field effect transistor Q2 to conduct. The cascaded boxes will supply power to the control circuit board of the current box, ultimately realizing the backup function.

[0032] When the LED cinema screen cabinets are cascaded, a total of two power supplies need to be installed inside the first cabinet 1 and the last cabinet N in the cascade. That is, two power supplies need to be installed inside the first and last cabinets to ensure that if the power supply of cabinet 1 or cabinet N fails, there is still a power supply to supply it.

[0033] The number of power supplies used in the unit box of the present application is reduced, which can reduce the cost of the power supply and make the structural space of the box more surplus.

[0034] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of the present invention; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An LED cinema screen, characterized in that: It includes a power supply, a display module, a structural frame, and a control circuit board; the power supply and the control circuit board are arranged on the back of the display module, and the display module is arranged in the structural frame to form an LED display box. Several LED display boxes are spliced ​​and assembled to form the LED cinema screen, and the LED display box includes an upper box and a lower box; the control circuit board controls and connects to the LED display box, and the power supply is connected to the control circuit board; The control circuit board also includes an upper control circuit board and a lower control circuit board; The upper control circuit board controls the connection to the upper box, and the lower control circuit board controls the connection to the lower box; Each of the LED display boxes except the first and last ones is equipped with a power supply; The LED box initially assembled in cascade in the LED cinema screen includes two power supplies: an upper power supply and a lower power supply; the last LED box includes two power supplies: a front power supply and a rear power supply; The power supplies in adjacent LED display boxes are connected to each other; In the adjacent LED display boxes, the lower control circuit board in the upper LED display box is connected to the upper control circuit board in the lower LED display box; In the LED box that is initially cascaded and assembled, the upper power supply is connected to the upper control circuit board and the lower control circuit board, and the lower power supply is connected to the lower control circuit board and the upper power supply; In the last LED box, the rear power supply is connected to the upper control circuit board and the lower control circuit board, and the front power supply is connected to the rear power supply and the upper control circuit board; The circuit principle of the control circuit board is as follows: the power interface JW1 is connected to the power supply of the current box, and JW2 is connected to the control circuit board of the cascade box. When the power supply of the current box is working normally, the emitter of the NPN transistor Q3 outputs a high level, and the emitter of Q3 is connected to the gate of the field effect tube Q1, thereby controlling the drain and source of the field effect tube Q1 to be turned on. After the current passes through Q1, the box is powered and the box starts to work.

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