CN216793270U - Display device and LED display screen - Google Patents
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- CN216793270U CN216793270U CN202122838868.7U CN202122838868U CN216793270U CN 216793270 U CN216793270 U CN 216793270U CN 202122838868 U CN202122838868 U CN 202122838868U CN 216793270 U CN216793270 U CN 216793270U
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Abstract
The utility model provides a display device and an LED display screen, wherein the display device comprises an adapter plate and a plurality of lamp panels, each lamp panel comprises a signal processing circuit and a plurality of temperature detection circuits, temperature detection and feedback of each lamp panel are completed, the signal processing circuit triggers and outputs a second level signal when receiving one of the temperature detection signals which is characterized by abnormal temperature, the adapter plate comprises a lamp panel driving circuit and a power switch circuit, when the second level signal output by any one of the signal processing circuits is received, the lamp panel driving circuit controls the power switch circuit to be switched off, the power supply of the lamp panel is cut off, the problem of combustion and ignition caused by further temperature rise of the lamp panel is prevented, the safety is improved, through the arrangement, the comprehensive temperature monitoring of the lamp panels can be improved, meanwhile, automatic power failure is realized, the feedback time efficiency is improved, and a single chip microcomputer structure is not required to be arranged on the lamp panels, the design cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of display screens, and particularly relates to a display device and an LED display screen.
Background
At present, the LED display screen has the characteristics of high brightness luminescence, bright color, high luminous efficiency, high contrast, short response time, wide working temperature range, low energy consumption and the like, and is widely applied to stage display equipment, advertisement display equipment, data visualization display equipment and commercial display equipment.
The LED display screen product still has PCB circuit short circuit that probably exists reasons such as components and parts inefficacy, intaking and arouse under different environment, leads to the product to generate heat, can seriously burn and catch fire.
Conventional LED display screen product adopts intelligent module monitoring temperature to prevent the scope burning and fire. The intelligent module is based on conventional lamp plate design, and increases a singlechip and a thermistor, and when there was temperature variation on the lamp plate, the thermistor resistance on the lamp plate changed thereupon, and the temperature analog signal is collected in real time to the singlechip, sends temperature monitoring data after the processing, and the host computer shows current temperature after receiving temperature monitoring data. When a certain lamp plate is too high in temperature, the upper computer displays red early warning of the corresponding lamp plate, and at the moment, the monitoring personnel are required to carry out troubleshooting on the lamp plate with the too high temperature.
The disadvantages of the conventional scheme are: first, a sustained temperature fault cannot be stopped in time. Monitoring personnel need to pay attention to the monitoring panel of the upper computer in real time, and when the temperature of the LED screen fails, the power supply of the LED display screen needs to be turned off and checked through manual operation. If monitoring personnel monitor in time, when temperature faults occur continuously, the hidden danger of fire is still generated. Secondly, a single thermistor on the intelligent lamp panel cannot cover the whole lamp panel. When the temperature fault point on the lamp panel is not in the area near the thermistor, the hidden danger of fire still exists when the temperature fault continuously occurs; thirdly, the cost is high. The intelligent module is all increased the singlechip on every intelligent lamp plate, to the well low-end product of no control demand, does not have obvious advantage.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a display device, and aims to solve the problems of the anti-burning scheme.
A first aspect of an embodiment of the present invention provides a display device, including:
the temperature detection circuit is used for acquiring a temperature detection signal of a set area in the lamp panel and feeding the temperature detection signal back to the signal processing circuit;
the temperature detection signals are all characterized by normal temperature, the signal processing circuit triggers and outputs a first level signal, and the temperature detection signals are characterized by abnormal temperature, and the signal processing circuit triggers and outputs a second level signal;
the adapter plate comprises a lamp panel driving circuit and a power switch circuit, the lamp panel driving circuit is respectively connected with signal ends of the signal processing circuits of the plurality of lamp panels and controlled ends of the power switch circuit, and power ends of the power switch circuit are respectively connected with power ends of the plurality of lamp panels;
the lamp panel driving circuit triggers and controls the power switch circuit to be switched on when receiving a plurality of feedback signals which are the first level signals, and triggers and controls the power switch circuit to be switched off when receiving a plurality of feedback signals which comprise at least one second level signal.
In one embodiment, the lamp panel further includes a plurality of LED lamps and LED driving chips, power terminals of the LED driving chips are connected to power terminals of the lamp panel, the lamp panel driving circuit is connected to signal terminals of the LED driving chips of each lamp panel through a data bus, and the signal terminals of the LED driving chips are connected to signal terminals of the plurality of LED lamps.
In one embodiment, the temperature detection circuit comprises a first thermistor, a first resistor, a second resistor, a third resistor, and a comparator;
the first end of the first resistor, the first end of the second resistor and the positive power supply end are connected in common, the second end of the first resistor, the first end of the first thermistor and the inverting input end of the comparator are connected in common, the second end of the second resistor, the first end of the third resistor and the non-inverting input end of the comparator are connected in common, the output end of the comparator forms the signal output end of the temperature detection circuit, and the second end of the first thermistor and the second end of the third resistor are both grounded.
In one embodiment, the temperature detection circuit comprises a second thermistor, a fourth resistor, a fifth resistor, a sixth resistor and a first triode;
the first end of the fourth resistor, the first end of the fifth resistor and the positive power supply end are connected in common, the second end of the fourth resistor, the first end of the second thermistor and the first end of the sixth resistor are connected in common, the second end of the sixth resistor is connected with the base electrode of the first triode, the second end of the fifth resistor and the collector electrode of the first triode are connected in common to form the signal output end of the temperature detection circuit, and the emitter electrode of the first triode and the second end of the second thermistor are both grounded.
In one embodiment, the signal processing circuit comprises at least one first logic gate;
and a plurality of signal input ends of at least one first logic gate are respectively correspondingly connected with the signal output ends of the plurality of temperature detection circuits, and at least one first logic gate is correspondingly connected in series and parallel and outputs the first level signal or the second level signal.
In one embodiment, the lamp panel driving circuit includes a controller, and a signal terminal of the controller is connected to the signal output terminals of the plurality of signal processing circuits and the power switch circuit, respectively.
In one embodiment, the lamp panel driving circuit comprises a latch circuit and at least one second logic gate;
and a plurality of signal input ends of at least one second logic gate are respectively and correspondingly connected with the signal output ends of the plurality of signal processing circuits, and at least one second logic gate is correspondingly connected in series and parallel and outputs a switch control signal to the latch circuit.
In one embodiment, the power switching circuit comprises a relay switching circuit.
In one embodiment, the display device further comprises a box body, a first side face of the box body is provided with a mounting face for mounting the plurality of lamp panels, and the adapter plate is arranged on a second side face back to the first side face.
A second aspect of the embodiments of the present invention provides an LED display screen, which includes at least one display device as described above.
Compared with the prior art, the embodiment of the utility model has the following beneficial effects: the display device is divided into two network elements of a lamp panel and a switching board, wherein a plurality of temperature detection circuits and signal processing circuits are correspondingly arranged on the lamp panel to complete temperature detection and feedback of a single lamp panel, the signal processing circuits trigger and output second level signals when receiving any detection signal representing abnormal temperature, which indicates that an abnormal temperature area exists on the lamp panel at the moment, a lamp panel driving circuit and a power switch circuit are arranged on the switching board, the switching board completes temperature detection and feedback of the plurality of lamp panels, when receiving the second level signals output by any signal processing circuit, the lamp panel driving circuit controls the power switch circuit to be switched off, the power supply of the lamp panel is cut off, the problem that the lamp panel is burnt and ignited due to further temperature rise is prevented, the safety is improved, through the arrangement, the comprehensive temperature monitoring of the lamp panel is improved, and simultaneously, realize automatic power-off, improve the feedback ageing to, need not to set up single chip structure on the lamp plate, reduced design cost.
Drawings
Fig. 1 is a schematic view of a first structure of a display device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a second structure of a display device according to an embodiment of the utility model;
FIG. 3 is a first circuit diagram of a temperature detection circuit in the display device shown in FIG. 1;
FIG. 4 is a second schematic circuit diagram of the temperature detection circuit in the display device shown in FIG. 1;
FIG. 5 is a schematic circuit diagram of a signal processing circuit in the display device shown in FIG. 1;
fig. 6 is a first schematic circuit diagram of a lamp panel driving circuit and a power switch circuit in the display device shown in fig. 1;
fig. 7 is a second schematic circuit diagram of a lamp panel driving circuit and a power switch circuit in the display device shown in fig. 1.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
A first aspect of an embodiment of the present invention provides a display device.
As shown in fig. 1, in the present embodiment, the display device includes:
the lighting system comprises a plurality of lamp panels 100, wherein each lamp panel 100 comprises a signal processing circuit 120 and a plurality of temperature detection circuits 110, the signal processing circuit 120 is respectively connected with the plurality of temperature detection circuits 110, and each temperature detection circuit 110 acquires a temperature detection signal of a set area in the lamp panel 100 and feeds the temperature detection signal back to the signal processing circuit 120;
the temperature detection signals are all characterized as normal temperature, the signal processing circuit 120 triggers and outputs a first level signal, and the temperature detection signals are characterized as abnormal temperature, the signal processing circuit 120 triggers and outputs a second level signal;
the adapter board 200, the adapter board 200 includes lamp panel driving circuit 210 and power switch circuit 220, the lamp panel driving circuit 210 is connected with the signal end of the signal processing circuit 120 of a plurality of lamp panels 100 and the controlled end of the power switch circuit 220 respectively, the power end of the power switch circuit 220 is connected with the power end of a plurality of lamp panels 100 respectively;
the lamp panel driving circuit 210 triggers the control power switch circuit 220 to turn on when receiving a plurality of feedback signals that are first level signals, and triggers the control power switch circuit 220 to turn off when receiving a plurality of feedback signals that include at least one second level signal.
In this embodiment, the temperature detection circuits 110 may be arranged according to the distribution of the LED lamps 140 of the lamp panel 100 or according to the size of the lamp panel 100, so as to detect the temperature of the set area of the lamp panel 100 and output the temperature detection signals correspondingly, where the temperature detection signals include a first temperature detection signal representing a normal temperature and a second temperature detection signal representing an abnormal temperature, when the plurality of set areas detected by the temperature detection circuits 110 are all at the normal temperature, the plurality of temperature detection circuits 110 all output the first temperature detection signal to the signal processing circuit 120, and when one or more of the set areas of the lamp panel 100 has an abnormal temperature, such as a high temperature, the one or more temperature detection circuits 110 correspondingly arranged respectively output the second temperature detection signal to the signal processing circuit 120, where the first temperature detection signal and the second temperature detection signal may be high and low level signals of opposite levels, or voltage feedback signals of different voltage levels, and the specific signal type is not limited.
Taking a single lamp panel 100 as an example, assuming that a first temperature detection signal is at a low level and a second temperature detection signal is at a high level, the signal processing circuit 120 implements a nor gate function, that is, the first level signal is at a high level and the second level signal is at a low level, and a truth table thereof is shown in table 1 below, that is, when all the temperature detection circuits 110 of the current lamp panel 100 output a low level, it indicates that a high temperature region does not occur in the current lamp panel 100, at this time, the signal processing circuit 120 outputs a high level, and when any one or more of the temperature detection circuits 110 output a high level, the signal processing circuit 120 outputs a low level, which indicates that an abnormal temperature occurs in at least one set region of the current lamp panel 100, and at this time, the low level is transmitted to the lamp panel driving circuit 210 of the adapter panel 200.
It is understood that the signal processing circuit 120 may be an or gate or a nor gate, and when the signal processing circuit is an or gate, the first level signal and the second level signal are respectively at a low level and a high level, and the type of the signal finally output by the signal processing circuit 120 is determined according to its own structure and the type of the input signal.
| |
Input 2 | Input 3 | Input n | Output the output |
| Low level of electricity | Low level of electricity | Low level of electricity | Low level of electricity | High level |
| High level | X | X | X | Low level of electricity |
| X | High level | X | X | Low level of electricity |
| X | X | High level | X | Low level of electricity |
| X | X | X | High level | Low level of electricity |
TABLE 1
The adapter board 200 is connected to the lamp panels 100 through power lines and signal lines, so as to implement temperature feedback and power on-off control, assuming that the first level signal is at a high level and the second level signal is at a low level, the lamp panel driving circuit 210 also implements an or gate or nor gate function, assuming that the nor gate function is implemented, a truth table thereof is shown in table 2 below, when all the lamp panels 100 output a high level, it indicates that no abnormal temperature condition occurs in any of the lamp panels 100, at this time, the lamp panel driving circuit 210 outputs a low level, the low level signal is output to the power switch circuit 220, the power switch circuit 220 is turned on, and outputs a power supply to each lamp panel 100, so as to provide the power supply to the lamp panels 100, thereby providing a working power supply for the modules such as the LED lamps 140 on the lamp panels 100.
Similarly, when at least one of them lamp plate 100 outputs the low level, show that one or more on at least one lamp plate 100 sets for regional abnormal temperature that appears, this moment, lamp plate drive circuit 210 outputs the high level, switch circuit 220 shuts off, switch power supply's output, prevent to correspond lamp plate 100 further temperature rise and lead to the problem that the burning is on fire, improve the security, through the aforesaid setting, can improve the comprehensive temperature monitoring to lamp plate 100, and simultaneously, realize the auto-power-off, improve the feedback ageing, and, need not to set up the single chip microcomputer structure on the lamp plate 100, design cost is reduced.
Similarly, it can be understood that the lamp panel driving circuit 210 may be an or gate or a nor gate, and correspondingly, the first level signal and the second level signal output by the lamp panel driving circuit 210 are respectively a high level and a low level, and the type of the signal finally output by the lamp panel driving circuit 210 is determined according to the structure of the lamp panel driving circuit and the type of the input signal.
TABLE 2
The temperature detection circuit 110 may adopt an infrared probe, a thermistor, etc., the signal processing circuit 120 may adopt a processing chip or a nor gate, etc., the lamp panel driving circuit 210 may also adopt a processing chip or a nor gate, etc., and the power switch circuit 220 may adopt a switch circuit with a controlled on-off function, such as a switch tube, a relay, etc., and is specifically set according to requirements.
In one embodiment, the display device further includes a box body, a first side surface of the box body is provided with a mounting surface for mounting the plurality of lamp panels 100, the adapter plate 200 is disposed on a second side surface facing away from the first side surface, that is, the adapter plate 200 is disposed on a back surface of the box body, and the lamp panels 100 are mounted on a front surface of the box body.
Further, in an embodiment, the lamp panel 100 further includes a plurality of LED lamps 140 and LED driving chips 130, a power end of the LED driving chip 130 is connected to a power end of the lamp panel 100, the lamp panel driving circuit 210 is respectively connected to signal ends of the LED driving chips 130 of the lamp panels 100 through a data bus, and the signal ends of the LED driving chips 130 are respectively connected to signal ends of the plurality of LED lamps 140.
The upper computer sends LED display data through a signal line, the lamp panel driving circuit 210 of the adapter panel 200 receives the display data, and outputs a driving signal for controlling the display of the lamp panel 100 through a data bus after operation, and the LED driving chip 130 on the lamp panel 100 outputs the driving signal to drive the LED lamp 140 to display corresponding brightness, color temperature and the like after receiving the display signal.
As shown in fig. 3, in one embodiment, the temperature detection circuit 110 includes a first thermistor NTC1, a first resistor R1, a second resistor R2, a third resistor R3, and a comparator U1;
the first end of the first resistor R1, the first end of the second resistor R2 and the positive power supply VCC are connected in common, the second end of the first resistor R1, the first end of the first thermistor NTC1 and the inverting input end of the comparator U1 are connected in common, the second end of the second resistor R2, the first end of the third resistor R3 and the non-inverting input end of the comparator U1 are connected in common, the output end of the comparator U1 forms a signal output end of the temperature detection circuit 110, and the second end of the first thermistor NTC1 and the second end of the third resistor R3 are both grounded.
In this embodiment, the temperature detecting circuit 110 adopts a thermistor and comparator U1 structure, wherein the second resistor R2 and the third resistor R3 divide the voltage of the positive power source terminal VCC and output a reference voltage, similarly, the first resistor R1 and the first thermistor NTC1 divide the voltage of the positive power source terminal VCC and output a feedback voltage, at a normal temperature, the resistance of the first thermistor NTC1 is greater than a preset resistance, at this time, the divided voltage of the first thermistor NTC1 and the first resistor R1 is greater than the reference voltage, the comparator U1 outputs a low level, when the temperature exceeds the normal temperature, that is, when a high temperature is generated, the resistance of the first thermistor NTC1 becomes small, that is, the divided voltage of the first thermistor NTC1 and the first resistor R1 is less than the reference voltage, at this time, the comparator U1 outputs a high level.
The positive power source VCC is connected to the power supply terminal of the lamp panel 100 through a corresponding power line or a power conversion circuit, and obtains a voltage of a corresponding magnitude.
The normal temperature and the high temperature can be set according to the requirement, for example, the limit is 101 ℃, the high temperature is 101 ℃ and the normal temperature is less than 101 ℃, wherein the resistance value of the first resistor R1 can be set according to the magnitude of the divided voltage of the thermistor.
As shown in fig. 4, in another embodiment, the temperature detecting circuit 110 adopts a thermistor and transistor structure, wherein the temperature detecting circuit 110 includes a second thermistor NTC2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a first transistor Q1;
the first end of the fourth resistor R4, the first end of the fifth resistor R5 and the positive power source VCC are connected in common, the second end of the fourth resistor R4, the first end of the second thermistor NTC2 and the first end of the sixth resistor R6 are connected in common, the second end of the sixth resistor R6 is connected with the base of the first triode Q1, the second end of the fifth resistor R5 and the collector of the first triode Q1 are connected in common to form a signal output end of the temperature detection circuit 110, and the emitter of the first triode Q1 and the second end of the second thermistor NTC2 are both grounded.
In this embodiment, under normal temperature, the resistance of the second thermistor NTC2 is greater than the predetermined resistance, the divided voltage of the second thermistor NTC2 and the fourth resistor R4 is greater than the turn-on threshold voltage of the first transistor Q1, assuming 0.7V, that is, the base voltage of the first transistor Q1 is greater than 0.7V, the first transistor Q1 is turned on, and the collector terminal of the first transistor Q1 is turned on to ground, that is, a low level is output. When the temperature exceeds the normal temperature, that is, when a high temperature is generated, the resistance of the second thermistor NTC2 is smaller than the preset resistance, the divided voltage between the second thermistor NTC2 and the fourth resistor R4 is smaller than the turn-on threshold voltage of the first triode Q1, that is, the base voltage of the first triode Q1 is smaller than 0.7V, the first triode Q1 is turned off, and the collector of the first triode Q1 is pulled up to the voltage of the positive power supply VCC by the fifth resistor R5, that is, a high level is output.
As shown in fig. 5, in one embodiment, the signal processing circuit 120 includes at least one first logic gate;
a plurality of signal input terminals of at least one first logic gate are respectively and correspondingly connected with the signal output terminals of the plurality of temperature detection circuits 110, and at least one first logic gate is correspondingly connected in series and parallel and outputs a first level signal or a second level signal.
In this embodiment, the number and the connection relationship of the first logic gates are correspondingly set according to the number of the temperature detection circuits 110, for example, as shown in fig. 5, when 9 temperature detection circuits 110 are provided, and the logic gates are provided with three input ends, 4 first logic gates U1A to U4A need to be provided, meanwhile, the first logic gates include or gates and/or nor gates, and the specific number and type are correspondingly set according to the output level requirement.
As shown in fig. 6, in an embodiment, the lamp panel driving circuit 210 includes a controller U2, and signal terminals of the controller U2 are respectively connected to the signal output terminals of the plurality of signal processing circuits 120 and the power switch circuit 220.
In this embodiment, the controller U2 may adopt a microprocessor, a single chip microcomputer, a central processing unit, and the like, the controller U2 executes the driving of the lamp panels 100, the power control, and the anti-burning operation, controls each lamp panel 100 to display a corresponding image according to the display information of the upper computer, and controls the on-off control of the power switch circuit 220 according to the level signal fed back by each lamp panel 100, thereby implementing the anti-burning function.
Simultaneously, controller U2 still can feed back the temperature state of current each lamp plate to the host computer to inform the current display device's of staff operating condition, thereby when taking place high temperature, can realize the auto-power-off function on the one hand, simultaneously, on the other hand can feed back corresponding indicating information to staff, and the suggestion staff carries out subsequent maintenance work.
As shown in fig. 7, in another embodiment, lamp panel driving circuit 210 includes latch circuit 211 and at least one second logic gate;
the signal input ends of at least one second logic gate are respectively connected to the signal output ends of the signal processing circuits 120, and the at least one second logic gate is connected in series and parallel and outputs a switch control signal to the latch circuit 211.
In this embodiment, the number and the connection relationship of the second logic gates are correspondingly set according to the number of the lamp panels 100, for example, as shown in fig. 7, when 6 lamp panels 100 are provided, and the logic gates are provided with three input ends, 3 second logic gates U1B-U3B need to be set, and meanwhile, the second logic gates include or gates and/or nor gates, which are specifically set correspondingly according to the output level requirement.
The latch circuit 211 is used to implement signal latch output, and ensure that the power switch circuit 220 continuously receives the switch control signal, thereby ensuring that the switch power circuit maintains a corresponding state.
Meanwhile, according to the lamp panel driving circuit 210 structure, as shown in fig. 6 and 7, in one embodiment, the power switching circuit 220 includes a relay switching circuit.
Wherein, relay switch circuit includes relay FR and second triode Q2, second triode Q2 is connected with lamp plate drive circuit 210's signal end, when detecting one of them or a plurality of lamp plate 100 output second level signal, lamp plate drive circuit 210 output high level, at this moment, second triode Q2 switches on, and actuation relay FR, relay FR disconnection, switching power supply output, and simultaneously, when received feedback signal is first level signal, lamp plate drive circuit 210 control second triode Q2 cuts off, relay FR maintains the normally closed state, power supply normally exports to each lamp plate 100.
The present invention further provides an LED display screen, which includes at least one display device, and the specific structure of the display device refers to the above embodiments, and since the LED display screen adopts all the technical solutions of all the above embodiments, the LED display screen at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
In this embodiment, the LED display screen can directly be formed by the concatenation of lamp plate 100, perhaps a plurality of lamp plates 100 are installed on the box that corresponds, and simultaneously, a plurality of boxes splice into the LED display screen, and concrete concatenation component mode is not limited.
Each display device in the LED display screen is in work and cooperation, the temperature of each display device is detected, and the anti-burning control is performed, so that the whole LED display screen is ensured to be under the reliable and safe working condition, and the display reliability is improved.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A display device, comprising:
the temperature detection circuit is used for acquiring a temperature detection signal of a set area in the lamp panel and feeding the temperature detection signal back to the signal processing circuit;
the temperature detection signals are all characterized by normal temperature, the signal processing circuit triggers and outputs a first level signal, and the temperature detection signals are characterized by abnormal temperature, and the signal processing circuit triggers and outputs a second level signal;
the adapter plate comprises a lamp panel driving circuit and a power switch circuit, the lamp panel driving circuit is respectively connected with signal ends of the signal processing circuits of the plurality of lamp panels and controlled ends of the power switch circuit, and power ends of the power switch circuit are respectively connected with power ends of the plurality of lamp panels;
the lamp panel driving circuit triggers and controls the power switch circuit to be switched on when receiving a plurality of feedback signals which are the first level signals, and triggers and controls the power switch circuit to be switched off when receiving a plurality of feedback signals which comprise at least one second level signal.
2. The display device of claim 1, wherein the lamp panel further comprises a plurality of LED lamps and LED driving chips, power terminals of the LED driving chips are connected with power terminals of the lamp panel, the lamp panel driving circuit is respectively connected with signal terminals of the LED driving chips of the lamp panels through data buses, and the signal terminals of the LED driving chips are respectively connected with signal terminals of the plurality of LED lamps.
3. The display device according to claim 1, wherein the temperature detection circuit includes a first thermistor, a first resistor, a second resistor, a third resistor, and a comparator;
the first end of the first resistor, the first end of the second resistor and the positive power supply end are connected in common, the second end of the first resistor, the first end of the first thermistor and the inverting input end of the comparator are connected in common, the second end of the second resistor, the first end of the third resistor and the non-inverting input end of the comparator are connected in common, the output end of the comparator forms the signal output end of the temperature detection circuit, and the second end of the first thermistor and the second end of the third resistor are both grounded.
4. The display device according to claim 1, wherein the temperature detection circuit includes a second thermistor, a fourth resistor, a fifth resistor, a sixth resistor, and a first transistor;
the first end of the fourth resistor, the first end of the fifth resistor and the positive power supply end are connected in common, the second end of the fourth resistor, the first end of the second thermistor and the first end of the sixth resistor are connected in common, the second end of the sixth resistor is connected with the base electrode of the first triode, the second end of the fifth resistor and the collector electrode of the first triode are connected in common to form the signal output end of the temperature detection circuit, and the emitter electrode of the first triode and the second end of the second thermistor are both grounded.
5. The display device of claim 1, wherein the signal processing circuit comprises at least one first logic gate;
and a plurality of signal input ends of at least one first logic gate are respectively correspondingly connected with the signal output ends of the plurality of temperature detection circuits, and at least one first logic gate is correspondingly connected in series and parallel and outputs the first level signal or the second level signal.
6. The display device of claim 1, wherein the lamp panel driving circuit comprises a controller, and a signal terminal of the controller is connected to the signal output terminals of the plurality of signal processing circuits and the power switch circuit, respectively.
7. The display device of claim 1, wherein the lamp panel driving circuit comprises a latch circuit and at least one second logic gate;
and a plurality of signal input ends of at least one second logic gate are respectively and correspondingly connected with the signal output ends of the plurality of signal processing circuits, and at least one second logic gate is correspondingly connected in series and parallel and outputs a switch control signal to the latch circuit.
8. The display device of claim 1, wherein the power switching circuit comprises a relay switching circuit.
9. The display device of claim 1, further comprising a box body, wherein a first side surface of the box body is provided with a mounting surface for mounting the plurality of lamp panels, and the adapter plate is arranged on a second side surface facing away from the first side surface.
10. An LED display screen, comprising at least one display device as claimed in any one of claims 1 to 9.
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| CN202122838868.7U CN216793270U (en) | 2021-11-18 | 2021-11-18 | Display device and LED display screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115171618A (en) * | 2022-07-15 | 2022-10-11 | 合肥京东方显示技术有限公司 | Overdrive adjusting unit and method, display panel and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115171618A (en) * | 2022-07-15 | 2022-10-11 | 合肥京东方显示技术有限公司 | Overdrive adjusting unit and method, display panel and display device |
| CN115171618B (en) * | 2022-07-15 | 2023-12-12 | 合肥京东方显示技术有限公司 | Overdrive adjusting unit and method, display panel and display device |
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