Display device

Abstract

The embodiment of the utility model provides display equipment. The display equipment comprises at least one display module unit and at least one power pack, the display module unit comprises a plurality of display modules, each display module comprises a lamp panel, and the display modules are configured to display images through the lamp panels; the plurality of display modules in the same display module unit are connected in parallel, at least one power pack comprises a plurality of power modules, the plurality of power modules are mutually connected, and the output end of each power module is connected with the display module in the corresponding display module unit. And the power pack is configured to supply power to the lamp panels in the display modules under the corresponding display module units through the plurality of power modules. The peak brightness of the display module can be improved.

Description

Technical Field

[0001] Embodiments of the present application relate to display technology. More specifically, it relates to a display device. Background Art

[0002] Display devices have been widely used in various industries. A display device is provided with a plurality of display modules, and each display module may include a plurality of lamp boards. The lamp board includes LED lamp beads, and corresponding images are displayed through different brightnesses of the LED lamp beads.

[0003] In related technologies, each display module corresponds to a power module, and the power module independently powers the lamp board in the corresponding display module. However, in related technologies, the peak brightness of the display module is relatively low, resulting in poor display effects.

[0004] Therefore, improving the peak brightness of the display module is a problem that needs to be solved. Summary of the Utility Model

[0005] Embodiments of the present application provide a display device, aiming to improve the peak brightness of the display module.

[0006] Embodiments of the present application provide a display device, including: at least one display module unit and at least one power supply group. The power supply group corresponds to the display module unit. The display module unit includes a plurality of display modules. The display module includes a lamp board. The display module is configured to display an image through the lamp board. A plurality of display modules under the same display module unit are connected in parallel; at least one of the power supply groups includes a plurality of power modules, and the plurality of power modules are connected to each other. The output end of the power supply group is connected to the input end in the corresponding display module unit. The power supply group is configured to supply power to the lamp board in the display module under the corresponding display module unit through a plurality of power modules.

[0007] In some embodiments, the power modules under the same power supply group are connected in parallel, and the output end after parallel connection is connected to the display module in the corresponding display module unit.

[0008] In some embodiments, the number of the power supply groups is one, and the number of the display module units is one.

[0009] In some embodiments, the number of the power supply groups is multiple, and the number of power modules in different power supply groups is the same or not completely the same.

[0010] In some embodiments, the display device further includes: a control circuit, connected to the power module, and configured to control the difference in output power of different power modules under the same power module group to be less than a first threshold.

[0011] In some embodiments, the control circuit is connected to a corresponding power supply module and is configured to control the output voltage of the corresponding power supply module to be the same as the output voltages of other power supply modules in the same power supply group, so that the difference in output power between different power supply modules in the same power supply module group is less than a first threshold.

[0012] In some embodiments, the control circuit is connected to a corresponding power supply module and other power supply modules connected in parallel with the corresponding power supply module, and is specifically configured to: obtain the current value of the load current representing the output voltage magnitude of the corresponding power supply module, and obtain the average current value of the load currents of all power supply modules; output a current sharing control voltage based on the difference between the current value of the load current and the average current value; and adjust the output voltage of the corresponding power supply module based on the current sharing control voltage so that the output voltages of the power supply modules connected in parallel are the same.

[0013] In some embodiments, the power supply module includes an indication terminal. The power supply module is configured to output a first level through the indication terminal when a fault occurs in the power supply module, and output a second level through the indication terminal when no fault occurs; the display device further includes: a power supply monitoring circuit connected to the indication terminals of the power supply modules in each power supply group, and configured to disconnect the power supply signal from accessing the power supply module when the indication terminal of the power supply module outputs the first level.

[0014] In some embodiments, the display device further includes: a plurality of first switches corresponding to the power supply modules; the first switches are connected to the corresponding power supply modules, and the first switches are configured to disconnect the connection between the output terminal of the power supply module and the output terminals of other power supply modules when the indication terminal outputs the first level.

[0015] In some embodiments, the display device further includes a frame, and the light boards under the same display module are mounted on the same frame; a plurality of the power supply modules are mounted independently of the frame.

[0016] In some embodiments, the control circuit includes: a comparison unit configured to obtain the current value of the load current of the corresponding power supply module and the average current value of the load currents of all power supply modules; and output a current sharing control voltage greater than zero when the difference between the current value of the load current and the average current value is greater than zero, and output a current sharing control voltage less than zero when the difference between the current value of the load current and the average current value is less than zero; an adjustment unit that receives a reference voltage and is configured to adjust the control signal when the current sharing control voltage is greater than zero, so that the corresponding power supply module reduces the output voltage based on the adjusted control signal, and adjust the control signal when the current sharing control voltage is less than zero, so that the corresponding power supply module increases the output voltage based on the adjusted control signal.

[0017] In some embodiments, the comparison unit includes: a first resistor, one end of the first resistor is connected to the output end of the corresponding power supply module, and the other end is connected to the other end of the first resistor of the display module and other control circuits; a first operational amplifier, the first operational amplifier is connected to both ends of the first resistor and is configured to amplify the load current flowing through the first resistor by a first multiple, where the first multiple is the number of the power supply modules; a second resistor, one end of the second resistor is connected to the output end of the first operational amplifier, and the other end is connected to the other end of the first resistor of multiple control circuits; a first comparator, a first input end of the first comparator is connected to one end of the second resistor, and a second output end of the first comparator is connected to the other end of the second resistor; an output end is connected to the adjustment unit.

[0018] An embodiment of the present application provides a display device, including at least one power supply group and at least one display module unit. The power supply group corresponds to the display module unit. The output end of the power supply group is connected to the lamp boards of multiple parallel display modules in the corresponding display module unit to supply power to the multiple display modules. In this solution, the power supply group is connected to multiple parallel display modules, so the power of each display module can be integrated for output. Also, since the corresponding gray levels of each display module are different, the corresponding powers are also different. In this way, the power saved by the display module with a low gray level can be provided to the display module with a high gray level. Therefore, compared with the related art, the power supply group in this embodiment can provide more power for the display module, thereby improving the maximum brightness that the display module can reach, that is, the peak brightness. Description of the Drawings

[0019] To more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0020] Figure 1 It is a schematic structural diagram of an LED display screen in an example;

[0021] Figure 2 It is a schematic circuit diagram of a power supply module according to some embodiments;

[0022] Figure 3 It is a schematic structural diagram of a display device in the related art;

[0023] Figure 4 It is a schematic structure of a display device provided by an embodiment of the present application Figure 1 ;

[0024] Figure 5 Structural schematic of a display device provided by an embodiment of the present application Figure 2 ;

[0025] Figure 6 Structural schematic of a display device provided by an embodiment of the present application Figure 3 ;

[0026] Figure 7 Structural schematic of a display device provided by an embodiment of the present application Figure 4 ;

[0027] Figure 8 Structural schematic of a display device provided by an embodiment of the present application Figure 5 ;

[0028] Figure 9 Structural schematic of a display device provided by an embodiment of the present application Figure 6 。 Detailed implementation manners

[0029] To make the objectives, implementation manners, and advantages of the present application clearer, the following will clearly and completely describe the exemplary implementation manners of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0030] It should be noted that the brief description of the terms in the present application is only for facilitating the understanding of the subsequent described implementation manners, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0031] In addition, the terms "include" and "have" and any of their variations are intended to cover but not exclude inclusion. For example, a product or device including a series of components does not necessarily have to be limited to those clearly listed components, but may include other components that are not clearly listed or are inherent to these products or devices. In addition, the "connection" between two components in the embodiments of the present application may be a direct connection or an indirect connection through other components.

[0032] The display device provided by the implementation manner of the present application may have various implementation forms. For example, it may be an LED display screen, a smart TV, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc.

[0033] Taking the LED display screen as an example, Figure 1 is a structural schematic diagram of an LED display screen in an example, as Figure 1As shown in the figure, the LED display screen may include a plurality of display modules 11 and a power supply module 20. Each display module includes a plurality of lamp boards 11. The plurality of lamp boards 11 are spliced together to form a display screen. The power supply module 20 is used to supply power to the lamp boards 11. The lamp boards 11 may include LED lamp beads, and corresponding images are displayed through the different brightness of the LED lamp beads.

[0034] Among them, the power supply module may be a switching power supply. Exemplarily, it can output corresponding supply voltage or supply current based on power supply inputs such as mains power. The specific structure of the power supply module is not limited in this application. Exemplarily, Figure 2 The schematic circuit diagram of the power supply module according to some embodiments is as Figure 2 shown. The power supply module 20 includes a filter rectifier circuit 21. The filter rectifier circuit 21 is configured to obtain mains power, filter the mains power, and then perform voltage rectification to output a DC signal.

[0035] In some embodiments, the power supply module 20 includes a power factor correction (PFC) circuit 22. The power factor correction circuit is configured to perform power factor compensation and correction on the DC signal based on the power generated by the current load to improve the utilization rate of electric energy. The output electrical signal is a corrected electrical signal.

[0036] In some embodiments, the power supply module 20 includes an LLC isolated voltage conversion circuit 23. The LLC isolated voltage conversion circuit 133 is configured to perform voltage conversion on the corrected electrical signal after power factor correction and output the voltage value required for the normal operation of the lamp board.

[0037] In the related art, each display module corresponds to a power supply module, and the power supply module 20 independently supplies power to the lamp boards in the display module where it is located. Figure 3 The schematic diagram of the structure of the display device in the related art is as Figure 3 shown. The display module 1 is powered by the power supply module 1, and the display module 2 is powered by the power supply module 2. However, in the related art, the peak brightness of the display module is relatively low, resulting in poor display effects.

[0038] Therefore, it is important to improve the peak brightness of the display module.

[0039] To this end, an embodiment of the present application provides a display device, including at least one power supply group and at least one display module unit. The power supply group corresponds to the display module unit, and the output end of the power supply group is connected to the lamp boards of multiple parallel display modules in the corresponding display module unit to supply power to the multiple display modules. It can be understood that in the related art, the power supply for each display module is independent, and the power supply between each power module is also independent. However, since the power supply group in this solution is connected to multiple parallel display modules, it can output power by integrating the power of each display module. Moreover, since the corresponding gray levels of each display module are different, the corresponding power is also different. In this way, the power saved by the display module with a low gray level can be provided to the display module with a high gray level. Therefore, compared with the related art, the power supply group in this embodiment can provide more power for the display module, thereby improving the maximum brightness that the display module can achieve, that is, the peak brightness.

[0040] In this way, compared with the related art, the power supply module in this embodiment can provide more power for the display module, thereby improving the maximum brightness that the display module can achieve to improve the display effect.

[0041] The technical solution of the present application will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0042] Figure 4 Structural schematic of a display device provided by an embodiment of the present application Figure 1 , as Figure 4 shown, the display device includes at least one display module unit 1 and at least one power supply group 2; the power supply group 2 can correspond to the display module unit 1.

[0043] Among them, the power supply group 2 can correspond to the display module unit 1 one by one. As Figure 4 shown, in this way, the power supply group 2 only supplies power to the display module 10 under one display module unit 1. Of course, the power supply group 2 can also correspond to multiple display module units 1 (not shown in the figure). Correspondingly, the power supply group 2 supplies power to the corresponding multiple display module units 1.

[0044] In some embodiments, as Figure 4 shown, the display module unit 1 includes multiple display modules 10. The display module 10 includes a lamp board 11, and the display module 10 is configured to display an image through the lamp board 11.

[0045] Among them, the structure of the lamp board 11 can refer to the example in Figure 1 . The brightness of different display modules 10 can be different, and the colors of the LED lamp beads in the lamp board 11 can also be different. Therefore, the power of different display modules 10 can be different.

[0046] In some embodiments, the power supply group 2 may include a plurality of interconnected power supply modules 20. The output ends of the power supply modules 20 are connected to the display modules 10 in the corresponding display module units 1. The power supply group 2 is configured to supply power to the lamp boards 11 in the display modules 10 under the corresponding display module units 1 through the plurality of power supply modules 20.

[0047] In the display device of this embodiment, the power supply group 2 corresponds to the display module unit 1. The display module unit 1 includes a plurality of display modules 10. At least one power supply group 2 includes a plurality of power supply modules 20. The plurality of power supply modules are interconnected. The output ends of the power supply modules 20 are connected to the display modules 10 in the corresponding display module units 1. The power supply group 2 is configured to supply power to the lamp boards 11 in the display modules 10 under the corresponding display module units 1 through the plurality of power supply modules 20.

[0048] In this solution, the power supply group 2 supplies power to a plurality of display modules 10 through a plurality of power modules. The maximum power that the power supply module 20 can output is fixed, and its actual output power is determined by the load, that is, the power of each display module 20. Since the gray levels of different display modules 20 in the same frame are different and the required power is also different, the power saved by the display modules 20 with low gray levels can be provided to the display modules 20 with high gray levels. Therefore, compared with the related art, the power supply module 20 in this embodiment can provide more power for the display module 20, thereby improving the maximum brightness that the display module 20 can reach, that is, the peak brightness.

[0049] For example, the display device in the related art includes 5 display modules 10. Each display module 10 corresponds to a power supply module 20. The maximum power that each power supply module 20 can provide is 100W. Each display module 10 is independently powered by the corresponding power supply module 20. Therefore, the maximum power of the display module 10 is 100W. In this solution, the power supply group 2 corresponds to a display module unit 1. The display unit group unit includes 5 display modules 10. The corresponding power supply group 2 includes 5 power supply modules 20. The maximum power that each power supply module 20 can provide is 100W. The maximum power that this power supply group 2 can provide is 500W (the same as the total power of 5 power supply modules 20 in the related art). Since the gray levels of the display modules in one frame are different and the corresponding powers are also different, and in this embodiment, the power supply module 20 of the power supply group 2 supplies power to a plurality of display modules 10, the power output of each display module 10 can be integrated. For example, the powers required by the display modules 10A - 10D with low gray levels are 30W, 20W, 50W, and 100W in sequence. In this way, the power supply module can provide 300W power to the display module 10 with high gray levels, thereby improving the peak brightness of the display device.

[0050] It should be noted that, asFigure 3 As shown in the figure, if a power module in the power supply module of a display device in the related art fails, the corresponding display module cannot work properly, resulting in poor display effects of the display device. In this embodiment, each display module is jointly powered by multiple power modules under the corresponding power supply group. If one of the power modules fails, it can still be powered by other power modules. That is to say, for each power module, other power modules under the power supply group where it is located can all be used as a backup for this power module. Therefore, this embodiment can also improve the reliability of the display of the display device.

[0051] It should also be noted that in the power supply group, some power supply groups may include multiple interconnected power modules, and some power supply groups may include one power module; it is also possible that all power supply groups include multiple interconnected power modules, and this embodiment does not limit this.

[0052] Furthermore, in one example, as Figure 4 shown, the power modules 20 under the same power supply group 2 are connected in parallel, and the output end after parallel connection is connected to the display module 10 in the corresponding display module unit 1.

[0053] In this example, the power modules 20 are connected in parallel. On the one hand, they can jointly output the corresponding power with other power modules 20. On the other hand, the interference between the power modules 20 is relatively small. When one power module 20 fails, it will not affect other power modules 20.

[0054] This embodiment does not limit the number of power supply groups 2.

[0055] For example, as Figure 4 shown, the number of power supply groups 2 is multiple. The multiple power supply groups 2 can be independent of each other. The power modules 20 in different power supply groups 2 supply power to the display modules 10 in different display module units 1. Therefore, when this solution improves the peak brightness of the display module 10, it can also improve the independence between the display module units 1, thereby reducing the influence between the display modules 10.

[0056] Again, Figure 5 is a schematic structure diagram of a display device provided by this embodiment Figure 2 , as Figure 5 shown, the number of power supply groups 2 is one. That is, all the power modules 20 in the display device are placed in one display group, and more power modules 20 can be balanced, so the peak brightness of the display module 10 can be further improved.

[0057] Furthermore, as Figure 5 shown, in the example where the number of power supply groups 2 is one, the number of display module units 1 is one.

[0058] That is to say, all the power modules 20 are connected in parallel to supply power to all the display modules 10. In this way, the power corresponding to the power outputs of more display modules 10 can be integrated, and thus the peak brightness of the display modules 10 can be further improved.

[0059] It should also be noted that in the example where the number of power groups 2 is multiple, the number of power modules 20 in different power groups 2 is the same or not completely the same.

[0060] For example, as Figure 4 shown, the number of power modules 20 in each power group 2 is equal, both being 2. For another example, as Figure 6 shown in the display device, the power group 2a includes 3 power modules 20, and the power group 2b includes 2 power modules 20.

[0061] It can be understood that when the number of power modules 20 in the same power group 2 is the same, the versatility of the power group 2 can be improved. When the numbers are not completely the same, the flexibility of power supply of the power group 2 can be improved.

[0062] In some embodiments, Figure 7 The following is a schematic structure of a display device provided by an embodiment of the present application. Figure 3 As Figure 7 shown, the display device may further include: a control circuit 30,

[0063] The control circuit 30 is connected to the power module 20 and is configured to control the difference between the output powers of different power modules under the same power module group 20 to be less than a first threshold.

[0064] In this embodiment, the difference between the output powers of different power modules under the same power module group is less than the first threshold, which can avoid too large a difference in the output powers of different power modules, so as to avoid too large an output power of an individual power module. Therefore, this embodiment can improve the service life of the power group.

[0065] In some embodiments, as Figure 7 shown, the number of control circuits 30 is multiple. The control circuit 30 is connected to the corresponding power module 20 and is configured to control the output voltage of the corresponding power module 20 to be the same as the output voltages of other power modules under the same power group, so that the difference between the output powers of different power modules under the same power group is less than the first threshold.

[0066] It should be noted that since the output voltages of each power supply module 20 cannot be exactly the same and the output impedance characteristics will also vary, simply paralleling the modules together cannot ensure that the output currents of each module are exactly the same. It is very likely that some power supply modules 20 operate at full load while some modules operate under no load. The no-load and full-load operations of the modules are not the best operating states and will affect the lifespan of the entire power supply module 20.

[0067] In this embodiment, a control circuit 30 is provided, which can control the output voltages of the paralleled power supply modules 20 to be the same, so that all the power supply modules 20 can share the load equally, thereby increasing the service life of the power supply module 20.

[0068] There are various implementation manners for the control circuit 30.

[0069] In one implementation manner, as Figure 7 shown, the number of control circuits 30 is multiple, and the multiple control circuits 30 correspond to the multiple power supply modules 20;

[0070] The control circuit 30 is specifically configured to:

[0071] Obtain the current value of the load current representing the output voltage magnitude of the corresponding power supply module 20, and obtain the average current value of the load currents of all the power supply modules 20;

[0072] Based on the difference between the current value of the load current and the average current value, output an equalizing current control voltage;

[0073] Based on the equalizing current control voltage, adjust the output voltage of the corresponding power supply module 20 so that the output voltages of the paralleled power supply modules 20 are equal.

[0074] In this implementation manner, the multiple control circuits 30 correspond to the multiple power supply modules 20. Exemplarily, the multiple control circuits 30 can correspond to the multiple power supply modules 20 one by one. Each control circuit 30 is connected to the corresponding power supply module 20 and other power supply modules 20 paralleled with the corresponding power supply module 20. The control circuit 30 can obtain the current value of the load current of this power supply module 20 and the average value of the load currents of other power supply modules 20 paralleled with it, and compare the two values. It can be understood that if the current value of the load current of the power supply module 20 corresponding to each control circuit 30 is equal to the average value of all the load currents, the output voltages of the paralleled power supply modules 20 are equal; otherwise, if they are not equal, there is a difference between the output voltage of the power supply module 20 corresponding to the control circuit 30 and the output voltages of other paralleled power supply modules 20.

[0075] Output a current sharing control voltage based on the difference between the current value of the load current and the average current value, and adjust the output voltage of the corresponding power supply module 20 based on the current sharing control voltage, so that the output voltages of the parallel power supply modules 20 are equal.

[0076] In this implementation manner, the control circuit 30 adjusts the output voltage of the corresponding power supply module 20 according to the comparison result between the current value of the load current of the corresponding power supply module 20 and the average value of the load currents of other modules in parallel with the power supply module 20, so that the output voltages of the parallel power supply modules 20 are the same.

[0077] Furthermore, Figure 8 The following is a schematic structure diagram of a display device provided in this embodiment Figure 5 , as Figure 8 shown, the control circuit 30 may include:

[0078] A comparison unit 31, configured to obtain the current value of the load current of the corresponding power supply module 20 and the average current value of the load currents of all power supply modules 20; and output a current sharing control voltage greater than zero when the difference between the current value of the load current is greater than the average current value, and output a current sharing control voltage less than zero when the difference between the current value of the load current is less than the average current value;

[0079] An adjustment unit 32, configured to demodulate the control signal when the current sharing control voltage is greater than zero, so that the corresponding power supply module 20 reduces the output voltage based on the adjusted control signal, and demodulate the control signal when the current sharing control voltage is less than zero, so that the corresponding power supply module 20 increases the output voltage based on the adjusted control signal.

[0080] In this embodiment, if the current value of the load current of the corresponding power supply module 20 is greater than the average current value, it indicates that the voltage value of the output voltage of the corresponding power supply module 20 is greater than the average voltage value of the output voltages of other power supply modules 20, so it is necessary to reduce the output voltage of this power supply module 20; conversely, if the current value of the load current of the corresponding power supply module 20 is less than the average current value, it indicates that the voltage value of the output voltage of the corresponding power supply module 20 is less than the average voltage value of the output voltages of other power supply modules 20, so it is necessary to increase the output voltage of this power supply module 20. If the current value of the load current of the corresponding power supply module 20 is equal to the average current value, there is no need to adjust the output voltage, so a current sharing control voltage with a voltage value of 0 can be output.

[0081] In one example, as Figure 8 shown, the comparison unit 31 includes:

[0082] The first operational amplifier U1 is connected to the output terminal of the corresponding power supply module 20 and is configured to amplify the load current of the corresponding display module by a first multiple, where the first multiple is the number of power supply modules 20;

[0083] The first resistor R1, one end of the first resistor R1 is connected to the output terminal of the first operational amplifier U1, and the other end is connected to the output terminals of multiple power supply modules;

[0084] The first comparator U2, the first input terminal of the first comparator U2 is connected to one end of the first resistor R1, the second output terminal of the first comparator U2 is connected to the other end of the first resistor R1; the output terminal is connected to the regulation unit 32.

[0085] An exemplary description of the working principle of this solution is made in combination with the actual application: such as Figure 8 In the figure, the first operational amplifier U1 is used to amplify the current value of the load current. Exemplarily, if the number of parallel power supply modules 20 is 5, the first operational amplifier U1 amplifies the sampled current value of the load current by 5 times. Where point A is the sum of the load currents of the 5 power supply modules 20.

[0086] During operation: The first comparator U2 compares the currents at the two output terminals. If the current value I1 of the load current is less than the average current value I 均 , then a current sharing control voltage less than zero is output; if the current value I1 of the load current is greater than the average current value I 均 then a current sharing control voltage greater than zero is output.

[0087] For the regulation unit 32, in some embodiments, continue to refer to Figure 8 , the regulation unit 32 may include a second operational amplifier U3,

[0088] The first input terminal of the second operational amplifier U3 is connected to the feedback circuit of the power supply module 20, the second input terminal receives the current sharing control voltage, and the output terminal is connected to the controller of the power supply module 20.

[0089] Combined with Figure 5 's example, the power supply module 20 may include an LLC and a PFC circuit, and may also include a controller and a feedback circuit. Among them, the controller outputs a control signal, such as a PWM signal, based on the feedback signal to control the switching tubes in the LLC and PFC circuits to control the output voltage.

[0090] In this embodiment, the second operational amplifier U3 outputs a final feedback signal based on the feedback signal and the current sharing control voltage to adjust the output voltage of the power supply module 20 through the final feedback signal.

[0091] In some embodiments, Figure 9Structural schematic of a display device provided in this embodiment Figure 6 , as Figure 9 shown, the power supply module 20 may include an indication terminal,

[0092] The power supply module 20 is configured to output a first level at the indication terminal when a fault occurs in the power supply module 20, and output a second level at the indication terminal when no fault occurs;

[0093] The display device further includes: a power supply monitoring circuit 16, connected to the indication terminals of the power supply modules 20 under each power supply group, for disconnecting the power supply signal from accessing the power supply module when the indication terminal of the power supply module 20 outputs a first level.

[0094] In this embodiment, the indication terminal may exemplarily be Figure 9 the PG pin in, and specific faults may include: when a fault occurs in the example LLC circuit or the buck circuit in the transformer circuit in combination Figure 5 , the PG pin will output a first level. If the power supply module 20 is working properly, the PG pin will output a second level. The power supply monitoring circuit 16 issues a signal when the PG pin is at the first level to disconnect the power supply signal from accessing the power supply module, where the power supply signal may be mains power or other power supply input signals.

[0095] Continuing to refer to Figure 9 , the power supply monitoring circuit 16 may be connected to all the power supply modules 20 for detecting the fault status of all the power supply modules 20.

[0096] In some embodiments, the display device further includes: a plurality of first switches, the first switches corresponding to the power supply modules; the first switches are connected to the corresponding power supply modules and are configured to disconnect the output terminals of the power supply modules from the output terminals of other power supply modules when the indication terminal outputs a first level. Through the first switches, the impact on the overall power supply of the display device when the power supply module 20 fails is ensured.

[0097] In some embodiments, the display module 10 further includes: the display device further includes a frame, and the light boards under the same display module are installed on the same frame; the power supply module is installed independently of the frame. This facilitates the maintenance of the power supply module 20.

[0098] This embodiment provides a display device, including at least one power supply group and at least one display module unit. The power supply group corresponds to the display module unit, and the output end of the power supply group is connected to the lamp boards of multiple parallel-connected display modules in the corresponding display module unit to supply power to the multiple display modules. In this solution, the power supply group is connected to multiple parallel-connected display modules, so the power of each display module can be integrated for output. Also, since the corresponding gray levels of each display module are different, the corresponding powers are also different. In this way, the power saved by the display module with a low gray level can be provided to the display module with a high gray level. Therefore, compared with the related art, the power supply group in this embodiment can provide more power for the display module, thereby being able to increase the maximum brightness that the display module can achieve, that is, the peak brightness.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0100] For the sake of convenience of explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussions are not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: The display device comprises: at least one display module unit and at least one power supply group; The display module unit includes a plurality of display modules, the display module includes a light board, and the display module is configured to display an image through the light board; Multiple display modules under the same display module unit are connected in parallel; At least one of the power groups includes multiple power modules, which are interconnected, and the output end of the power group is connected to the input end in the corresponding display module unit. The power group is configured to supply power to the light board in the display module under the corresponding display module unit through the multiple power modules.

2. The display device according to claim 1, characterized in that The power modules under the same power group are connected in parallel, and the output ends after the parallel connection are connected to the display modules in the corresponding display module units.

3. The display device according to claim 1, characterized in that The number of the power supply group is one, and the number of the display module unit is one.

4. The display device according to claim 1, characterized in that There are multiple power supply groups, and the numbers of power supply modules in different power supply groups may be the same or different.

5. The display device according to claim 1, characterized in that The display device further includes: a control circuit connected to the power module and configured to control the difference in output power of different power modules in the same power module group to be smaller than a first threshold.

6. The display device according to claim 5, characterized in that The number of the control circuits is multiple; The control circuit is connected to the corresponding power module and is configured to control the output voltage of the corresponding power module to be the same as the output voltage of other power modules under the same power group, so that the difference in output power of different power modules under the same power module group is less than a first threshold.

7. The display device according to claim 6, characterized in that The control circuit is connected to the corresponding power module and other power modules connected in parallel with the corresponding power module, and is specifically configured as follows: Obtaining the current value of the load current representing the output voltage of the corresponding power module, and obtaining the average current value of the load current of all power modules; Based on the difference between the current value of the load current and the average current value, outputting a current sharing control voltage; The output voltage of the corresponding power module is adjusted based on the current sharing control voltage so that the output voltages of the power modules connected in parallel are the same.

8. The display device according to any one of claims 1 to 7, characterized in that: The power module comprises an indication terminal, and the power module is configured to output a first level through the indication terminal when a fault occurs in the power module, and to output a second level through the indication terminal when no fault occurs; The display device further comprises: a power monitoring circuit connected to the indicating terminal of the power module under each power group, and used for disconnecting the power supply signal from connecting to the power module when the indicating terminal of the power module outputs the first level.

9. The display device according to claim 8, characterized in that The display device further includes: a plurality of first switches, the first switches corresponding to the power supply modules; The first switch is connected to a corresponding power module, and the first switch is configured to disconnect the output end of the power module from the output ends of other power modules when the indication end outputs a first level.

10. The display device according to any one of claims 1 to 7, characterized in that: The display device also includes a frame, and the light panels under the same display module are installed on the same frame; the power module is installed independently of the frame.

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