CN110888762A - Display module, display screen and display screen power supply backup method - Google Patents
Display module, display screen and display screen power supply backup method Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2015—Redundant power supplies
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- G—PHYSICS
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- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/30—Monitoring
- G06F11/3058—Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations
- G06F11/3062—Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations where the monitored property is the power consumption
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Abstract
The invention relates to a display module, a display screen and a display screen power supply backup method, wherein the method comprises the steps of obtaining output state parameters of a power supply module; detecting whether the output state parameters are matched with the preset state parameters; when the output state parameter is not matched with the preset state parameter, an interrupt signal is sent to the power supply module; and sending a power adjusting signal to a display unit corresponding to the power supply module. After the fault occurs, only the output of the fault power supply module is stopped, the display unit corresponding to the fault power supply module is supplied with power through the adjacent power supply, and the power adjusting signal is sent to the display unit corresponding to the fault power supply module, so that the required input of the display unit is reduced to the preset input power, the continuous display of the display unit corresponding to the fault power supply module is ensured under the condition that the display unit corresponding to the adjacent power supply module is ensured to normally supply power, the condition that the display unit corresponding to the fault power supply module does not display is avoided, and the black screen probability of the display unit is reduced.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display module, a display screen and a display screen power supply backup method.
Background
With the development of display screen technology, more and more display screens are used for various scenes, so that the use ways of various displays are continuously increased in daily life. Since the display screen is used for displaying images, power needs to be supplied to the display screen to ensure normal display. Each display area of traditional display screen corresponds has power supply to supply power for it, in order to ensure the normal demonstration of display screen, ensure each display area normal display promptly, when having power supply trouble, the system is through cutting off module with fault power and display screen disconnection, later send the card according to mains power and the required power of display screen, judge the power that needs the output, open the inside channel switch of display screen at last, make normal power supply power for the display screen, thereby make all normal operating power supply for including the display screen power supply that fault power corresponds including the display area.
However, in the above process, since the faulty power supply stops supplying power to the corresponding display area, and before all the normal power supplies supply power to the display screen, the display area corresponding to the faulty power supply is in a non-display state, so that the display screen has a period of blank screen, within the response time range of the existing processing chip, for example, a system card and a sending card in the display screen, the display screen still has a short blank screen visible to the naked eye, and the processing chip with shorter response time increases the manufacturing cost.
Disclosure of Invention
Therefore, it is necessary to provide a display module, a display screen and a power backup method for the display screen, which can reduce the probability of screen blacking.
A power supply backup method for a display screen comprises the following steps: acquiring an output state parameter of a power supply module; detecting whether the output state parameters are matched with preset state parameters; when the output state parameter is not matched with the preset state parameter, sending an interrupt signal to the power supply module so that the power supply module stops outputting power to the corresponding display unit; sending a power adjusting signal to a display unit corresponding to the power supply module so as to reduce the input power required by the display unit corresponding to the power supply module to a preset input power; the display screen is provided with a plurality of power supply modules, two adjacent power supply modules are cascaded, and the adjacent normal power supply modules provide preset input power for the corresponding display units through the power supply modules with faults.
In one embodiment, the obtaining the output state parameter of the power supply module includes: and acquiring the output power of the power supply module.
In one embodiment, the detecting whether the output state parameter matches a preset state parameter includes: and detecting whether the output power is greater than or equal to a preset power.
In one embodiment, the sending an interrupt signal to the power module to stop the power module from outputting power to the corresponding display unit when the output state parameter does not match the preset state parameter includes: and when the output power is smaller than the preset power, sending an interrupt signal to the power supply module to interrupt the power supply module to serve as the output power of the corresponding display unit module.
In one embodiment, the sending the power adjustment signal to the display unit corresponding to the power module includes: acquiring a preset brightness parameter of a display screen; and acquiring a power adjusting signal according to the preset brightness parameter, and sending the power adjusting signal to a display unit corresponding to the power supply module.
In one embodiment, the preset brightness parameter is 1/20-1/5 of the brightness parameter of the display unit during normal display.
A display module, comprising: the power supply comprises a plurality of display units, a plurality of power supply modules and system cards corresponding to the power supply modules, wherein the output end of each power supply module is connected with one display unit and supplies power to the display units; the adjacent two power supply modules are cascaded, and the currents between the adjacent two power supply modules are equal, so that when the power supply modules have faults, the adjacent normal power supply modules provide preset input power for the corresponding display units through the fault power supply modules; the system card is used for acquiring output state parameters of the power supply module; the system card is also used for detecting whether the output state parameters are matched with preset state parameters; the system card is also used for sending an interrupt signal to the power supply module when the output state parameter is not matched with the preset state parameter so as to enable the power supply module to stop outputting power to the corresponding display unit; the system card is further used for sending a power adjusting signal to the display unit corresponding to the power supply module so that the input power required by the display unit corresponding to the power supply module is reduced to a preset input power.
In one embodiment, the power module has an output detection terminal, the output detection terminal of the power module is connected to the detection terminal of the corresponding system card, and the output detection terminal of the power module is used for sending the output state of the power module to the system card.
In one embodiment, the power module has an output control end, the output control end of the power module is connected to the second output end of the corresponding system card, and the output control end of the power module is used for controlling the output state of the power module.
A display screen, comprising: the display module assembly of the aforesaid any embodiment, the display module assembly with the screen body coupling, the light emitting area of display element deviates from the screen body, power module with the system card sets up in the display element is close to the one side of the screen body.
The display module, in the display screen and the display screen power supply backup method, through obtaining the output state parameter of the power supply module, whether the current power supply module breaks down or not is convenient to know, after the break down, only the output of the power supply module breaks down is stopped, the power is supplied to the display unit corresponding to the power supply module, and the power adjusting signal is sent to the display unit corresponding to the power supply module, so that the input required by the display unit is reduced to the preset input power, the adjacent power supply module ensures that the display unit corresponding to the power supply module continuously displays under the condition of ensuring the normal power supply of the display unit corresponding to the adjacent power supply module, the condition that the display unit corresponding to the power supply module does not display is avoided, and the black screen probability of the display unit is effectively reduced.
Drawings
FIG. 1 is a flowchart of a power backup method for a display screen according to an embodiment;
fig. 2 is a schematic structural diagram of a display module according to an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention relates to a display screen power supply backup method. In one embodiment, the display screen power supply backup method comprises the following steps: acquiring an output state parameter of a power supply module; detecting whether the output state parameters are matched with preset state parameters; when the output state parameter is not matched with the preset state parameter, sending an interrupt signal to the power supply module so that the power supply module stops outputting power to the corresponding display unit; sending a power adjusting signal to a display unit corresponding to the power supply module so as to reduce the input power required by the display unit corresponding to the power supply module to a preset input power; the display screen is provided with a plurality of power supply modules, two adjacent power supply modules are cascaded, and the adjacent normal power supply modules provide preset input power for the corresponding display units through the power supply modules with faults. In the display screen power supply backup method, the output state parameters of the power supply modules are acquired, whether the current power supply module breaks down or not is convenient to know, after the power supply module breaks down, only the output of the power supply module with the fault is stopped, the power is supplied to the display unit corresponding to the power supply module with the fault through the adjacent power supply, and the power adjusting signal is sent to the display unit corresponding to the power supply module with the fault, so that the required input of the display unit is reduced to the preset input power, the display unit corresponding to the power supply module with the fault is ensured to continuously display under the condition that the normal power supply of the display unit corresponding to the power supply module with the adjacent power supply module is ensured, the condition that the display unit corresponding to the power supply module with the fault does not display is.
Please refer to fig. 1, which is a flowchart illustrating a power backup method for a display screen according to an embodiment of the present invention.
In one embodiment, the display screen power supply backup method comprises part or all of the following steps.
S100: and acquiring the output state parameters of the power supply module.
In this embodiment, the display screen is composed of a plurality of display units, and the plurality of display units are distributed in an array to form a complete display screen. Each display unit is correspondingly connected with one power module, and the power module supplies power to the display units so as to maintain normal display of the pictures of the display screen and ensure normal light emission of the display units. The output of the power supply module provides guarantee for the normal display of the display unit, the output state of the power supply module influences the normal display of the display unit, namely when the output state of the power supply module is normal, the display unit displays normally, and when the output state of the power supply module fails, the display unit does not display any more, namely the display unit displays the abnormal state. In order to facilitate detection of the output state of the power supply module, the output quantity of the power supply module is digitized, that is, a physical output signal of the power supply module is converted into a specific numerical parameter, for example, an analog output signal of the output current of the power supply module is converted into a mean value of current amplitude; for another example, the analog output signal of the output voltage of the power module is converted into a mean value of voltage amplitudes; as another example, the output current signal and the output voltage signal of the power supply module are converted into an average value of power. In the conversion process, an Analog/Digital (a/D) converter or a Digital Signal Processor (DSP) may be used to detect the output state of the power module, so as to accurately determine whether the output state of the power module is a normal state or an abnormal state.
S200: and detecting whether the output state parameters are matched with preset state parameters.
In this embodiment, the output state parameter directly represents the current operating state of the power module, that is, the current output state of the power module is related to the output state parameter, and the preset parameter is the output state parameter corresponding to the power module in the normal operating state, and it is detected whether the output state parameter is matched with the preset state parameter, that is, the current output state of the power module is compared with the output state in the normal operating state, that is, the current operating state of the power module is compared with the output state corresponding to the power module in the normal operating state, that is, the output state parameter corresponding to the power module in the normal operating state is used as a standard. Therefore, the current running state of the power module is compared with the normal running state of the power module, namely, the parameter corresponding to the real-time running state of the power module is compared with a fixed value parameter, the comparison results of the two parameters are divided into two types, one type of result indicates that the power module is in the normal running state, the other type of result indicates that the power module is in the abnormal running state, and the current running state of the power module is convenient to judge according to the comparison result of the two parameters, so that the subsequent operation corresponding to different running states of the power module is convenient.
S300: and when the output state parameter is not matched with the preset state parameter, sending an interrupt signal to the power supply module so that the power supply module stops outputting power to the corresponding display unit.
In this embodiment, the output state parameter is not matched with the preset state parameter, which indicates that the current operating state of the power module is not matched with the normal operating state thereof, that is, indicates that the current output state of the power module is not matched with the output state corresponding to the power module in the normal operating state thereof, that is, indicates that the parameter corresponding to the current output state of the power module is different from the parameter corresponding to the output state of the power module in the normal operating state thereof, at this time, the output state of the power module is an abnormal state, that is, the current output state of the power module is a fault state, for example, the output power of the power module is smaller than the output power of the power module in the normal operating state thereof. In this way, the output of the power module is in an unstable state, in order to reduce the influence on the display stability of the display unit, for the failed power module, the failed power module stops outputting power to the corresponding display unit by sending an interrupt signal to the failed power module, but at this time, the failed power module is still connected with the corresponding display unit, so that the adjacent normally-operating power module supplies power to the display unit through the failed power module, the failed power module serves as a channel for conducting the corresponding display unit and the adjacent power module, and it can be considered that the failed power module at this time is equivalent to a conducting wire, so that the adjacent normally-operating power module is electrically connected with the display unit corresponding to the failed power module, and the subsequent adjacent normally-operating power module provides required input power for the display unit corresponding to the failed power module, therefore, the adjacent power supplies can ensure that the display unit corresponding to the fault power supply continuously displays under the condition of ensuring the normal power supply of the display unit corresponding to the adjacent power supplies, the condition that the display unit corresponding to the fault power supply does not display is avoided, and the black screen probability is reduced.
S400: sending a power adjusting signal to a display unit corresponding to the power supply module so as to reduce the input power required by the display unit corresponding to the power supply module to a preset input power; the display screen is provided with a plurality of power supply modules, two adjacent power supply modules are cascaded, and the adjacent normal power supply modules provide preset input power for the corresponding display units through the power supply modules with faults.
In this embodiment, a power adjusting unit for adjusting the required input power is disposed in the display unit, and after receiving the power adjusting signal, the power adjusting unit adjusts the input power of the fault power module corresponding to the display unit, so that the fault power module corresponding to the display unit is in an operating state with relatively low input power, and the brightness of the picture displayed by the fault power module corresponding to the display unit is in relatively low brightness. The preset input power is set in advance for an internal program of a system card in the display screen, the preset input power is set according to the number of display units in the display screen and the maximum output power of the power supply module, the preset input power ensures relatively low input power of the display unit corresponding to the fault power supply module, and the input power can also ensure that a picture displayed by the display unit can be received by human eyes, namely the display brightness of the display unit corresponding to the fault power supply module is in relatively low brightness. Because a cascade mode is adopted among a plurality of power supply modules, the power supply cascade is characterized in that the current between adjacent power supplies is kept equal at any time. In normal operation, namely when there is no faulty power supply module, the output power of each power supply module is equal, and the current between adjacent power supply modules is also equal; when a power module fails, the failed power module does not output any more, so that the current between the failed power module and the adjacent power module which normally operates is changed, and in order to continuously maintain the characteristic that the current between the adjacent power modules is the same, a power adjusting signal is sent to the display unit corresponding to the power module, so that the adjacent power module which normally operates outputs power for the display unit corresponding to the failed power module, and therefore, the power modules are in a cascade mode, and simultaneously, preset input power is provided for the display unit corresponding to the failed power module, and the display unit corresponding to the failed power module is ensured to work at the preset input power when the display unit corresponding to the failed power module fails, namely, the display unit corresponding to the failed power module is ensured to operate at a relatively low input power when the power module fails, that is, it is ensured that the display unit corresponding to the failed power module performs display at relatively low brightness when the failure occurs.
In one embodiment, the preset input power is related to the rated output power and the maximum output power of the power supply module, because the models of the power supply modules are the same, the rated output power of the power supply module is equal to the corresponding input power when the display unit normally displays, and the surplus power between the rated output power and the maximum output power of the power supply module provides the preset input power for the display unit corresponding to the failed power supply module.
In one embodiment, the number of the display units of the display screen is N, the maximum value of the preset input power is a difference value between the maximum output power and the rated power of the power module, the minimum value of the preset input power is 1/(N-1) of the difference value between the maximum output power and the rated power of the power module, and the preset input power is correspondingly adjusted according to the number of the display screens.
In one embodiment, the obtaining the output state parameter of the power supply module includes: and acquiring the output power of the power supply module. In this embodiment, the display screen is composed of a plurality of display units, and the plurality of display units are distributed in an array to form a complete display screen. Each display unit is correspondingly connected with one power module, and the power module supplies power to the display units so as to maintain normal display of the pictures of the display screen and ensure normal light emission of the display units. The output of the power supply module provides guarantee for the normal display of the display unit, the output state of the power supply module influences the normal display of the display unit, namely when the output state of the power supply module is normal, the display unit displays normally, and when the output state of the power supply module fails, the display unit does not display any more, namely the display unit displays the abnormal state. In order to facilitate detection of the output state of the power supply module, the output quantity of the power supply module is digitized, that is, a physical output signal of the power supply module is converted into a specific numerical parameter, for example, an output current signal and an output voltage signal of the power supply module are converted into an average power value. The conversion process may be performed by various devices for converting analog signals into digital signals, such as an analog-to-digital converter or a digital signal processor. Therefore, the output state of the power supply module is converted into the corresponding power value, so that visual comparison can be conveniently carried out according to the value, namely, the current output state of the power supply module is embodied in a digital form, and the output state of the power supply module is accurately judged to be a normal state or an abnormal state.
In one embodiment, the detecting whether the output state parameter matches a preset state parameter includes: and detecting whether the output power is greater than or equal to a preset power. In this embodiment, the preset power is an output power corresponding to the power module in a normal operation state, and the magnitude of the output power directly reflects a current operation state of the power module, that is, the magnitude of the output power directly reflects whether the operation state of the power module is in a fault state or a normal state, that is, the magnitude of the output power directly reflects whether the operation state of the power module is normal or not. And detecting whether the output power is greater than or equal to a preset power, namely comparing the current output power of the power supply module with the output power in normal operation as a standard. Thus, the current output power of the power module is compared with the output power corresponding to the normal operation state of the power module, that is, the output power corresponding to the real-time operation state of the power module is compared with a fixed value power, the comparison result of the two powers is divided into two types, wherein one type of result is that the output power is greater than or equal to the preset power, which indicates that the power module is in the normal operation state, and the other type of result is that the output power is less than the preset power, which indicates that the power module is in the abnormal operation state. According to the comparison result of the two powers, the current running state of the power supply module is convenient to judge, so that the corresponding operation is convenient to be carried out on different running states of the power supply module subsequently.
In one embodiment, the sending an interrupt signal to the power module to stop the power module from outputting power to the corresponding display unit when the output state parameter does not match the preset state parameter includes: and when the output power is smaller than the preset power, sending an interrupt signal to the power supply module to interrupt the power supply module to serve as the output power of the corresponding display unit module. In this embodiment, the fact that the output power is smaller than the preset power indicates that the current output power of the power supply module is smaller than the output power corresponding to the normal operating state of the power supply module, that is, indicates that the current output power of the power supply module is smaller than a normal value. At this time, the output state of the power supply module is an abnormal state, that is, the current output state of the power supply module is a fault state. In this way, the output of the power module is in an unstable state, in order to reduce the influence on the display stability of the display unit, for the failed power module, by sending an interrupt signal to the failed power module, the failed power module stops outputting power to the corresponding display unit, that is, the power of the failed power module is not input to the corresponding display unit any more, but the failed power module is still connected with the corresponding display unit, so that the adjacent normally-operating power module supplies power to the display unit through the failed power module, the failed power module serves as a channel for conducting the corresponding display unit and the adjacent power module, and it can be considered that the failed power module at this time is equivalent to one conducting wire, so that the adjacent normally-operating power module is electrically connected with the display unit corresponding to the failed power module, and the adjacent normally-operating power module provides required input power for the display unit corresponding to the failed power module Therefore, the adjacent power supplies can ensure that the display unit corresponding to the fault power supply continuously displays under the condition of ensuring the normal power supply of the display unit corresponding to the adjacent power supplies, the condition that the display unit corresponding to the fault power supply does not display is avoided, and the black screen probability is reduced.
In one embodiment, after the detecting whether the output power is greater than or equal to a preset power, the method further includes: and when the output power is greater than or equal to the preset power, sending a normal operation signal to the power supply module. In this embodiment, the output power is greater than or equal to the preset power, which indicates that the current operation state of the power supply module is a normal operation state, and at this time, the power supply module only needs to maintain the previous output power, that is, the output power of the power supply module is kept unchanged, so that the power supply module continuously and normally outputs the power supply module, thereby ensuring normal display of the display unit corresponding to the power supply module.
In one embodiment, the sending the power adjustment signal to the display unit corresponding to the power module includes: acquiring a preset brightness parameter of a display screen; and acquiring a power adjusting signal according to the preset brightness parameter, and sending the power adjusting signal to a display unit corresponding to the power supply module. In this embodiment, the brightness of the display unit is related to the input power thereof, so that the preset brightness parameter corresponds to the preset input power, that is, the preset brightness parameter is positively related to the preset input power, that is, when the preset brightness parameter is decreased, the preset input power is decreased correspondingly. The power adjusting signal is used for controlling the input power of the display unit corresponding to the failed power module, the power adjusting signal is obtained according to the preset brightness parameter, the preset brightness parameter is correspondingly set according to the preset input power, and the preset input power is the corresponding input power of the lowest brightness of the display unit, so that when the preset input power is used as the working power of the display unit corresponding to the failed power module, the display brightness of the display unit corresponding to the failed power module is maintained at relatively low brightness, the relatively low brightness ensures the display of the display unit, the condition that the display unit does not display is avoided, and the black screen probability of the display unit is reduced.
In one embodiment, the preset brightness parameter is 1/20-1/5 of the brightness parameter of the display unit during normal display. In this embodiment, in order not to affect the normal power module as the corresponding output power of the display unit, the preset brightness parameter of the display unit is set to be smaller than the brightness parameter when the display unit is normally displayed, and the preset brightness parameter is much smaller than the brightness parameter when the display unit is normally displayed, so that when the power module fails, the brightness of the corresponding display unit is displayed at an extremely low brightness, and the brightness corresponding to the preset brightness parameter is still within the range that can be distinguished by human eyes, thereby avoiding the situation that the picture displayed by the display unit is mistakenly regarded as not being displayed. In one embodiment, the preset brightness parameter is 1/10 of the brightness parameter of the display unit during normal display. In one embodiment, the preset input power corresponding to the preset brightness parameter is determined according to the rated output power and the maximum output power of the power module, the rated output power of the power module is used for supplying power to the respective corresponding display unit, and a portion of the power module exceeding the rated output power is used for supplying power to the display unit corresponding to the failed power module, where the preset input power corresponding to the preset brightness parameter is referred to a difference between the maximum output power and the rated output power of the power module, for example, when the number of the display units of the display screen is N, the preset input power is 1/(N-1) of the difference between the maximum output power and the rated output power of the power module, and the rated output power and the maximum output power of the power module are adjusted according to the above ratio, and correspondingly adjusting the brightness corresponding to the preset input power, wherein a specific derivation formula is as follows:
{[1/(N-1)]*(Pmax-P0)}/P0＝A
Pmax/P0＝1+A(N-1)
wherein, P0Is the rated output power, P, of the power supply modulemaxThe maximum output power of the power supply module is N, the total number of the display units on the display screen is N, and A is the ratio of the preset brightness parameter to the brightness parameter of the display units during normal display. Thus, under the condition that the preset brightness parameter is 1/10 of the brightness parameter when the display unit normally displays, the preset input power is 1/10 of the rated output power of the power supply module, so that the ratio of the maximum output power to the rated output power of the power supply module is 10: and N +9, when the number of the display screens is determined, correspondingly adjusting the ratio of the preset brightness parameter to the brightness parameter of the display unit during normal display according to the rated output power and the maximum output power of the power supply module, further realizing the corresponding adjustment of the brightness corresponding to the preset input power, and ensuring the normal operation of the normal power supply module.
In one embodiment, a display module is implemented by using the display screen power supply backup method described in any one of the above embodiments. In one embodiment, the display module has a functional module for implementing the display screen power supply backup method corresponding to each step. In one embodiment, please refer to fig. 2, a display module 10 is provided, which includes: the display device comprises a plurality of display units 100, a plurality of power modules 200 and system cards 300 corresponding to the power modules, wherein the output end of each power module 200 is connected with one display unit 100 and supplies power to the display unit 100, the detection end of each system card 300 is connected with one power module 200, and the first output end of each system card 300 is connected with the display unit 100 corresponding to the power module 200; two adjacent power modules 200 are cascaded, and the currents between the two adjacent power modules 200 are equal, so that when a power module 200 fails, the adjacent normal power modules 200 provide preset input power for the corresponding display units 100 through the failed power module; the system card 300 is used for acquiring output state parameters of the power module 200; the system card 300 is further configured to detect whether the output status parameter matches a preset status parameter; the system card 300 is further configured to send an interrupt signal to the power module 200 when the output status parameter is not matched with the preset status parameter, so that the power module 200 stops outputting power to the corresponding display unit 100; the system card 300 is further configured to send a power adjustment signal to the display unit 100 corresponding to the power module 200, so that the input power required by the display unit 100 corresponding to the power module 200 is reduced to a preset input power.
In the display module 10, the system card 300 obtains the output status parameters of the power module 200, so as to know whether the power module 200 is faulty or not, after a failure, the system card 300 sends an interrupt signal to the failed power module, stops only the output of the failed power module, but also maintains the electrical connection with the display unit 100, the display unit 100 corresponding to the failed power module is powered by the adjacent power, and the system card 300 reduces the required input of the display unit 100 to the preset input power by sending a power adjustment signal to the display unit 100 corresponding to the failed power module, so that the adjacent power module 200 can supply power normally to its corresponding display unit 100, the display unit 100 corresponding to the power supply module with the fault continuously displays, the situation that the display unit 100 corresponding to the power supply module with the fault does not display is avoided, and the black screen probability of the display module 10 is reduced. In the above embodiment, when the power module fails, the system card only needs to send an interrupt signal to the failed power module after detecting that the output state parameter of the power module is abnormal, so that the failed power module stops outputting, and a specific cut-off module is not needed to cut off the failed power module.
In one embodiment, referring to fig. 2, the power module 200 has an output detection terminal, the output detection terminal of the power module 200 is connected to the detection terminal of the system card 300, and the output detection terminal of the power module 200 is used for sending the output state of the power module 200 to the system card 300. In this embodiment, the power modules 200 supply power to the corresponding display units 100, the power modules 200 output power to the corresponding display units 100, so that the corresponding display units 100 display normally, and when the power modules 200 are in failure, the system card 300 needs to accurately determine the output states of the power modules 200, so that the output states of the power modules 200 need to be detected, where the output states of the power modules 200 include a normal output state and a failure state. The output detection end of the power module 200 outputs a corresponding detection signal, for example, a current detection signal corresponding to the output current of the power module 200; for another example, the output current of the power module 200 corresponds to a voltage detection signal; as another example, the output current of the power module 200 corresponds to a power detection signal. The detection end of the system card 300 obtains the detection signal output by the output detection end of the power module 200, and converts the detection signal into a corresponding output state parameter, so that the system card 300 can receive and judge whether the power module 200 is in a fault state. In the above conversion process, an analog-to-digital converter or a digital signal processor may be used, so that the output state of the power module 200 is detected by the system card 300, and the system card 300 can accurately determine whether the output state of the power module 200 is a normal state or an abnormal state.
In one embodiment, referring to fig. 2, the power module 200 has an output control terminal, the output control terminal of the power module 200 is connected to the second output terminal of the system card 300, and the output control terminal of the power module 200 is used for controlling the output state of the power module 200. In this embodiment, after obtaining the output state parameter of the power module 200, the detection end of the system card 300 analyzes and determines the output state parameter, that is, compares the output state parameter of the power module 200 with the preset state parameter, so as to determine the current operation state of the power module 200, where the output state parameter of the power module 200 is the output power of the power module 200, the preset state parameter is the output power corresponding to the power module 200 during normal output, and when the system card 300 detects that the output state parameter is smaller than the preset state parameter, the system card 300 determines that the output state of the power module 200 is the fault state. At this time, the first output end of the system card 300 sends a power adjustment signal to the corresponding display unit 100, so that the input power of the display unit 100 corresponding to the power module 200 is reduced, and the brightness of the display unit 100 corresponding to the power module 200 is reduced, but the display unit 100 is still in a display state, thereby avoiding the situation that the display unit 100 corresponding to the power module 200 is in a black screen. While the first output terminal of the system card 300 sends the power adjustment signal to the corresponding display unit 100, the second output terminal of the system card 300 is connected to the output control terminal of the power module 200, so that the power output from the adjacent power module 200 to the corresponding display unit 100 through the failed power module is reduced, and in cooperation with the reduction of the input power of the display unit 100, it is ensured that the display unit 100 corresponding to the failed power module operates at a lower power, and thus it is ensured that the display unit 100 corresponding to the failed power module performs display at a lower brightness, and the black screen ratio of the display unit 100 corresponding to the failed power module is reduced. In one embodiment of specific application, actual tests show that the black screen rate of the display unit corresponding to the power module with the fault is reduced to about 99.8% -99.9%, namely the black screen probability of the display unit corresponding to each power module with the fault is 0.1% -0.2%.
In one embodiment, referring to fig. 2, a power adjustment module 110 is disposed on the display unit 100, a first output terminal of the system card 300 is connected to an input terminal of the power adjustment module 110, and an output terminal of the power adjustment module 110 is connected to the display unit 100. In this embodiment, the power adjustment module 110 is configured to receive a power adjustment signal sent by the system card 300, and obtain input power of a corresponding display unit 100 according to the power adjustment signal, that is, obtain display brightness of the corresponding display unit 100 according to the power adjustment signal, where the power adjustment module 110 sends an input power request signal corresponding to the power adjustment signal to the display unit 100, that is, the power adjustment module 110 converts the power adjustment signal into an input power request signal, so that the display unit 100 operates with the input power corresponding to the power adjustment signal, where the input power request signal corresponding to the power adjustment signal is an input power request signal required by the display unit 100 in a current state, that is, the input power required by the display unit 100 is determined. When the power module 200 fails, the input power corresponding to the power adjustment signal is smaller than the input power corresponding to the power module 200 during normal operation, so that the required input power of the display unit 100 of the failed power module is smaller than the input power of the normal power module 200, and the input power of the power module 200 after the failure is reduced, so as to match the situation that the input power of the display unit 100 is reduced, ensure that the display unit 100 corresponding to the failed power module operates at a lower power, ensure that the display unit 100 corresponding to the failed power module displays at a lower brightness, and reduce the black screen ratio of the display unit 100 corresponding to the failed power module.
In one embodiment, referring to fig. 2, the display module 10 further includes a sending card 400, where the sending card 400 is connected to each system card 300, and the sending card 400 sends a control signal to each system card according to the number of the faulty power modules detected by the system card, where the control signal controls the input power of all the display units through the system cards and keeps the same input power, that is, the control signal controls the system cards to send the same power adjustment signal to the respective corresponding display units, so that the display units operate at the same power and lower than the power during normal operation, and thus the display units display at the brightness lower than the normal display brightness, and the image display effects are the same.
In one embodiment, the number of the power modules is two, the number of the system cards corresponds to the number of the power modules one by one, the two power modules are cascaded, each power module is connected with one display unit and supplies power to the display unit, and each system card is connected with one power module and the corresponding display unit respectively. The method comprises the following steps that the specific operation condition is that the maximum output power of a power module is 200W, the maximum required input power of a display unit is 150W, when one adjacent normal power module fails, a system card sends an interrupt signal to rapidly interrupt the output power of the failed power module to the display unit, the brightness of the display unit corresponding to the failed power module is controlled to be 10% of the whole screen, the input power of the display unit corresponding to the failed power module is 30W, at the moment, the normal power module temporarily carries the power consumption of two display units, after ten seconds, the sending card detects the working state of the system card, the brightness of the whole screen is directly reduced, and the maximum power consumption of a single display unit is not more than 100W.
In one embodiment, the number of the power modules is three, the number of the system cards corresponds to the number of the power modules one by one, the three power modules are cascaded, each power module is connected with one display unit and supplies power to the display unit, and each system card is respectively connected with one power module and the corresponding display unit. The method comprises the following steps that specific operation conditions, for example, the maximum output power of a power module is 200W, the maximum requirement of a display unit is 150W, when one power module fails, a system card rapidly interrupts the failed power module to output power to the display unit, and controls the brightness of the display unit corresponding to the failed power module to be 10% of the whole screen, wherein the input power of the display unit corresponding to the failed power module is 30W, at the moment, an adjacent normal power supply temporarily carries the power consumption of two display units, after ten seconds, a sending card detects the working state of the system card, the brightness of the whole screen is directly reduced, and the maximum power consumption of a single display unit is not more than 133W; for another example, when 2 power modules fail, the sending card reduces the brightness of the whole screen and satisfies that the maximum power consumption of a single display unit does not exceed 66W.
In one embodiment, a display screen is provided, comprising: the display module assembly of the aforesaid any embodiment, the display module assembly with the screen body coupling, the light emitting area of display element deviates from the screen body, power module with the system card sets up in the display element is close to the one side of the screen body.
In the above-mentioned display screen, acquire power module's output state parameter, be convenient for know whether current power module breaks down, after breaking down, only stop trouble power module's output, the display element that corresponds for trouble power module supplies power through adjacent power, and through the display element send power adjustment signal to trouble power module corresponds, make the required input of this display element reduce to predetermineeing input power, thereby make adjacent power module under the circumstances of guaranteeing the normal power supply of the display element that self corresponds, ensure that the display element that trouble power module corresponds lasts the demonstration, the circumstances that the display element that has avoided trouble power module to correspond does not show, the black screen probability of display element has been reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power supply backup method for a display screen is characterized by comprising the following steps:
acquiring an output state parameter of a power supply module;
detecting whether the output state parameters are matched with preset state parameters;
when the output state parameter is not matched with the preset state parameter, sending an interrupt signal to the power supply module so that the power supply module stops outputting power to the corresponding display unit;
sending a power adjusting signal to a display unit corresponding to the power supply module so as to reduce the input power required by the display unit corresponding to the power supply module to a preset input power; the display screen is provided with a plurality of power supply modules, two adjacent power supply modules are cascaded, and the adjacent normal power supply modules provide preset input power for the corresponding display units through the power supply modules with faults.
2. The method for backing up power supply of display screen according to claim 1, wherein the obtaining the output state parameter of the power supply module comprises:
and acquiring the output power of the power supply module.
3. The method for backing up power supply of display screen according to claim 2, wherein the detecting whether the output status parameter matches with a preset status parameter comprises:
and detecting whether the output power is greater than or equal to a preset power.
4. The method for backing up power of display screen according to claim 3, wherein the sending an interrupt signal to the power module to stop the power module from outputting power to the corresponding display unit when the output status parameter does not match the preset status parameter comprises:
and when the output power is smaller than the preset power, sending an interrupt signal to the power supply module to interrupt the power supply module to serve as the output power of the corresponding display unit module.
5. The method for backing up power supply of display screen according to claim 1, wherein said sending power adjustment signal to the display unit corresponding to the power supply module comprises:
acquiring a preset brightness parameter of a display screen;
and acquiring a power adjusting signal according to the preset brightness parameter, and sending the power adjusting signal to a display unit corresponding to the power supply module.
6. The power supply backup method for the display screen of claim 5, wherein the preset brightness parameter is 1/20-1/5 of the brightness parameter when the display unit is normally displaying.
7. A display module, comprising: the power supply comprises a plurality of display units, a plurality of power supply modules and system cards corresponding to the power supply modules, wherein the output end of each power supply module is connected with one display unit and supplies power to the display units;
the display unit is characterized in that two adjacent power supply modules are cascaded, and the currents between the two adjacent power supply modules are equal, so that when the power supply modules are in failure, the adjacent normal power supply modules provide preset input power for the corresponding display units through the failure power supply modules;
the system card is used for acquiring output state parameters of the power supply module; the system card is also used for detecting whether the output state parameters are matched with preset state parameters; the system card is also used for sending an interrupt signal to the power supply module when the output state parameter is not matched with the preset state parameter so as to enable the power supply module to stop outputting power to the corresponding display unit; the system card is further used for sending a power adjusting signal to the display unit corresponding to the power supply module so that the input power required by the display unit corresponding to the power supply module is reduced to a preset input power.
8. The display module according to claim 7, wherein the power module has an output detection terminal, the output detection terminal of the power module is connected to the detection terminal of the corresponding system card, and the output detection terminal of the power module is configured to send the output status of the power module to the system card.
9. The display module according to claim 7, wherein the power module has an output control terminal, the output control terminal of the power module is connected to the second output terminal of the corresponding system card, and the output control terminal of the power module is configured to control the output state of the power module.
10. A display screen, comprising: the display module assembly of any one of claims 7 to 9, wherein the display module assembly is connected to the screen body, a light emitting surface of the display unit faces away from the screen body, and the power module and the system card are disposed on a surface of the display unit close to the screen body.
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| CN201911268602.4A CN110888762A (en) | 2019-12-11 | 2019-12-11 | Display module, display screen and display screen power supply backup method |
| PCT/CN2020/100384 WO2021114646A1 (en) | 2019-12-11 | 2020-07-06 | Display module, display screen and display screen power supply backup method |
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| WO2021114646A1 (en) * | 2019-12-11 | 2021-06-17 | 深圳市洲明科技股份有限公司 | Display module, display screen and display screen power supply backup method |
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