CN112071258A - Novel control system of LED display screen and dormancy method and awakening method thereof - Google Patents
Novel control system of LED display screen and dormancy method and awakening method thereof Download PDFInfo
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- CN112071258A CN112071258A CN202010891972.XA CN202010891972A CN112071258A CN 112071258 A CN112071258 A CN 112071258A CN 202010891972 A CN202010891972 A CN 202010891972A CN 112071258 A CN112071258 A CN 112071258A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a control system of a novel LED display screen, which comprises a main control unit and a display module, wherein the main control unit comprises a main control network transformer, and the display module comprises a sub-control input network transformer and a sub-control output network transformer; the main control unit receives the sleep signal, the wake-up signal and the display control signal and sends the sleep signal, the wake-up signal and the display control signal through a main control network transformer; the display module receives a sleep signal, a wake-up signal and a display control signal which are sent by the main control network transformer through the sub-control input network transformer; the display module sends a sleep signal, a wake-up signal and a display control signal to a sub-control input network transformer of the next display module through the sub-control output network transformer. When the LED display screen is in the dormant state, the power supply of the dormancy awakening module and the module power supply single chip microcomputer is kept, the control module, the sub-control module and the display lamp panel do not need to be kept, and the dormant power consumption of the LED display screen is reduced.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to a control system of a novel LED display screen and a dormancy method and a wake-up method thereof.
Background
The LED display screen is an electronic display screen formed by LED lattices, the display content forms of the screen, such as characters, animations, pictures and videos, are changed in time by the red and green lamp beads which are turned on and off, and the display control of the components is carried out through a modular structure.
The LED display screen is mainly divided into a display lamp panel (also called a display module), a control system and a power supply system. The display lamp panel is a screen formed by LED lamp point arrays and emits light, and the plurality of display lamp panel arrays are spliced to form the screen. The control system realizes the conversion of the content displayed on the screen under the on-off condition in the regulation area; the control system comprises a video processor, a sending card, a main control card, a sub-control card, a receiving card and other control units. The power supply system converts the input voltage and current to meet the requirement of the display screen, and comprises a power supply and a power converter. The display module comprises a display lamp panel, a receiving card and a power converter. A plurality of display module assembly arrays splice forms the display screen.
As shown in fig. 1, when an existing LED display screen enters a sleep mode or a standby mode, a video converter receives an external sleep signal and sends a black screen signal to a sending card, the sending card sends the black screen signal to a receiving card in a display module, the receiving card in the display module sends the black screen signal to a receiving card in a next module, each receiving card sends the black screen signal to a driver IC of a display lamp panel, and the driver IC controls an LED lamp on the display lamp panel to stop emitting light, so that the LED display screen stops displaying.
Therefore, when the existing LED display screen is in a dormant state, only the LED lamp on the display lamp panel stops lighting, and the control system and the driving IC on the display lamp panel still keep operating, that is, the power system keeps supplying power to each control unit in the control system and the driving IC on the display lamp panel. This sleep state still consumes a certain amount of power, and the sleep power consumption is still high.
The network transformer, also called data pump, is used in network to transmit data, and filters the difference signal from PHY by using differential mode coupled coil coupling to enhance signal, and couples to the other end of different level connection network wire by conversion of electromagnetic field. Moreover, the network transformer is a passive element, and can work when a signal exists without adding a power supply in a circuit.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a novel control system of an LED display screen, a dormancy method and a wake-up method thereof according to the defects of the prior art, and solve the problem of high standby dormancy power consumption of the prior LED display screen.
The technical scheme of the invention is realized as follows:
the novel control system of the LED display screen comprises a main control unit and a display module, wherein the main control unit comprises a main control network transformer, and the display module comprises a sub-control input network transformer and a sub-control output network transformer;
the main control unit receives a sleep signal, a wake-up signal and a display control signal and sends the sleep signal, the wake-up signal and the display control signal through the main control network transformer;
the display module receives a sleep signal, a wake-up signal and a display control signal which are sent by the main control network transformer through the sub-control input network transformer;
and the display module sends a sleep signal, a wake-up signal and a display control signal to a sub-control input network transformer of the next display module through the sub-control output network transformer.
Furthermore, the main control unit also comprises a main control module, a dormancy awakening module and a main control power converter;
the master control module receives a display control signal of a video source and sends the display control signal to the master control network transformer;
the sleep awakening module receives a sleep signal and an awakening signal of the instruction receiver and sends the sleep signal and the awakening signal to the master control network transformer and the master control power converter;
the master control power supply converter is respectively in power supply connection with the master control module and the dormancy awakening module.
Furthermore, the display module also comprises a sub-control module, a display lamp panel, a module power supply single chip microcomputer and a module power supply converter;
the sub-control module receives a display control signal of the sub-control input network transformer and sends the display control signal to the display lamp panel and the sub-control output network transformer;
the module power supply single chip microcomputer receives the sleep signal and the wake-up signal of the sub-control input network transformer and sends the sleep signal and the wake-up signal to the module power supply converter and the sub-control output network transformer;
the module power converter is respectively connected with the sub-control module, the display lamp panel and the module power single chip microcomputer in a power supply mode.
Furthermore, the master control network transformer, the branch control input network transformer and the branch control output network transformer comprise a low-frequency channel and a high-frequency channel; the sleep signal and the wake-up signal are transmitted through the low-frequency channel, and the display control signal is transmitted through the high-frequency channel.
The dormancy method of the control system based on the novel LED display screen comprises the following steps:
a) the sleep awakening module receives a sleep signal and sends the sleep signal to the master control power converter and the master control network transformer; the master control network transformer transmits a sleep signal to the sub-control input network transformer;
b) the sub-control input network transformer sends a sleep signal to the module power supply single chip microcomputer, and the module power supply single chip microcomputer sends the sleep signal to the module power converter and the sub-control output network transformer; the sub-control network transformer transmits a sleep signal to a sub-control input network transformer of the next display module;
c) repeating the step b) for a plurality of times to enable all the module power converters to receive the sleep signals;
d) the main control power supply converter stops supplying power to the main control module after receiving the sleep signal, and the module power supply converter stops supplying power to the sub-control module and the display lamp panel after receiving the sleep signal.
The awakening method of the control system based on the novel LED display screen comprises the following steps:
a) the wake-up module receives a wake-up signal and sends the wake-up signal to the master control power converter and the master control network transformer; the master control network transformer sends a wake-up signal to the sub-control input network transformer;
b) the sub-control input network transformer sends a wake-up signal to the module power supply single chip microcomputer, and the module power supply single chip microcomputer sends the wake-up signal to the module power converter and the sub-control output network transformer; the sub-control network transformer sends the wake-up signal to a sub-control input network transformer of the next display module;
c) repeating the step b) for a plurality of times to enable all the module power converters to receive the wake-up signals;
d) the main control power supply converter recovers to supply power to the main control module after receiving the wake-up signal, and the module power supply converter recovers to supply power to the sub-control module and the display lamp panel after receiving the wake-up signal.
By adopting the technical scheme, the invention has the beneficial effects that:
(1) when the LED display screen is in a dormant state, the master control power converter only needs to keep supplying power to the dormant awakening module, the module power converter only needs to keep supplying power to the module power single chip microcomputer, the control module, the sub-control module and the display lamp panel do not need to keep supplying power, and dormant power consumption of the LED display screen is reduced.
(2) The dormancy awakening module and the module power supply single chip microcomputer are equal low-power modules, the low-voltage power supply end of the master control power supply converter is in power supply connection with the dormancy awakening module, the low-voltage power supply end of the module power supply converter is in power supply connection with the module power supply single chip microcomputer, and dormancy power consumption of the LED display screen is further reduced.
(3) The display control signal, the dormancy signal and the awakening signal are transmitted through the same network and the same network cable, a new signal network does not need to be built, a new data line does not need to be set, the use of wires is reduced, and the LED display screen is convenient to assemble and maintain.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram of a conventional LED display screen.
Fig. 2 is a block diagram of the first embodiment.
In fig. 1 and 2, solid arrows indicate transmission directions of sleep signals or wake-up signals, hollow arrows indicate transmission directions of display control signals, and line arrows indicate transmission directions of power supplies.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, a first embodiment of the present invention provides a control system for a novel LED display screen, which includes a main control unit and a display module, wherein the main control unit includes a main control network transformer, and the display module includes a sub-control input network transformer and a sub-control output network transformer.
The main control unit receives the sleep signal, the wake-up signal and the display control signal and sends the sleep signal, the wake-up signal and the display control signal through the main control network transformer.
And the display module receives the dormancy signal, the awakening signal and the display control signal sent by the main control network transformer through the sub-control input network transformer.
And the display module sends a sleep signal, a wake-up signal and a display control signal to a sub-control input network transformer of the next display module through the sub-control output network transformer.
In a first embodiment, the main control unit further includes a main control module, a sleep wake-up module, and a main control power converter.
And the main control module receives a display control signal of a video source and sends the display control signal to the main control network transformer. The video source can be a computer, a video player, a mobile phone and other equipment; in addition, the main control module can write in an operating system and generate display control signals, and can also read the display control signals stored locally.
And the dormancy awakening module receives a dormancy signal and an awakening signal of the instruction receiver and sends the dormancy signal and the awakening signal to the master control network transformer and the master control power converter. The instruction receiver can be an infrared receiver, and a user can send a sleep signal or a wake-up signal through an infrared remote controller so as to control the LED display screen to sleep or wake up.
The master control power supply converter is respectively in power supply connection with the master control module and the dormancy awakening module. The sleep awakening module is a low-power module, the master control power converter is provided with a low-voltage power supply end, and the low-voltage power supply end is in power supply connection with the sleep awakening module.
In a first embodiment, the display module further includes a sub-control module, a display lamp panel, a module power supply single chip microcomputer and a module power supply converter.
And the sub-control module receives the display control signal of the sub-control input network transformer and sends the display control signal to the display lamp panel and the sub-control output network transformer.
And the module power supply single chip microcomputer receives the sleep signal and the wake-up signal of the sub-control input network transformer and sends the sleep signal and the wake-up signal to the module power supply converter and the sub-control output network transformer.
The module power converter is respectively connected with the sub-control module, the display lamp panel and the module power single chip microcomputer in a power supply mode. Wherein, the module power singlechip is the low power module, and module power converter is provided with the low pressure feed end, and this low pressure feed end is connected with module power singlechip power supply
In a first embodiment, the master control network transformer, the branch control input network transformer and the branch control output network transformer each include a low frequency channel and a high frequency channel; the sleep signal and the wake-up signal are transmitted through the low-frequency channel, and the display control signal is transmitted through the high-frequency channel.
It should be noted that the main control module and the sub-control module are both control units in the control system, and can perform function division and selection according to the use requirements, the main control module can be any one or a combination of a main control card, a controller, and a video processor, and the sub-control module can be any one or a combination of a sending card, a receiving card, and a sub-control card.
The second embodiment provided by the invention is based on the sleep method of the first embodiment, and comprises the following steps:
a) the sleep awakening module receives a sleep signal and sends the sleep signal to the master control power converter and the master control network transformer; the master control network transformer transmits a sleep signal to the sub-control input network transformer;
b) the sub-control input network transformer sends a sleep signal to the module power supply single chip microcomputer, and the module power supply single chip microcomputer sends the sleep signal to the module power converter and the sub-control output network transformer; the sub-control network transformer transmits a sleep signal to a sub-control input network transformer of the next display module;
c) repeating the step b) for a plurality of times to enable all the module power converters to receive the sleep signals;
d) the main control power supply converter stops supplying power to the main control module after receiving the sleep signal, and the module power supply converter stops supplying power to the sub-control module and the display lamp panel after receiving the sleep signal.
A third embodiment of the present invention provides a wake-up method based on the first embodiment, including the following steps:
a) the wake-up module receives a wake-up signal and sends the wake-up signal to the master control power converter and the master control network transformer; the master control network transformer sends a wake-up signal to the sub-control input network transformer;
b) the sub-control input network transformer sends a wake-up signal to the module power supply single chip microcomputer, and the module power supply single chip microcomputer sends the wake-up signal to the module power converter and the sub-control output network transformer; the sub-control network transformer sends the wake-up signal to a sub-control input network transformer of the next display module;
c) repeating the step b) for a plurality of times to enable all the module power converters to receive the wake-up signals;
d) the main control power supply converter recovers to supply power to the main control module after receiving the wake-up signal, and the module power supply converter recovers to supply power to the sub-control module and the display lamp panel after receiving the wake-up signal.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. Novel control system of LED display screen, including main control unit and display module assembly, its characterized in that: the main control unit comprises a main control network transformer, and the display module comprises a sub-control input network transformer and a sub-control output network transformer;
the main control unit receives a sleep signal, a wake-up signal and a display control signal and sends the sleep signal, the wake-up signal and the display control signal through the main control network transformer;
the display module receives a sleep signal, a wake-up signal and a display control signal which are sent by the main control network transformer through the sub-control input network transformer;
and the display module sends a sleep signal, a wake-up signal and a display control signal to a sub-control input network transformer of the next display module through the sub-control output network transformer.
2. The control system of the novel LED display screen according to claim 1, characterized in that: the main control unit also comprises a main control module, a dormancy awakening module and a main control power converter;
the master control module receives a display control signal of a video source and sends the display control signal to the master control network transformer;
the sleep awakening module receives a sleep signal and an awakening signal of the instruction receiver and sends the sleep signal and the awakening signal to the master control network transformer and the master control power converter;
the master control power supply converter is respectively in power supply connection with the master control module and the dormancy awakening module.
3. The control system of the novel LED display screen according to claim 2, characterized in that: the display module also comprises a sub-control module, a display lamp panel, a module power supply single chip microcomputer and a module power supply converter;
the sub-control module receives a display control signal of the sub-control input network transformer and sends the display control signal to the display lamp panel and the sub-control output network transformer;
the module power supply single chip microcomputer receives the sleep signal and the wake-up signal of the sub-control input network transformer and sends the sleep signal and the wake-up signal to the module power supply converter and the sub-control output network transformer;
the module power converter is respectively connected with the sub-control module, the display lamp panel and the module power single chip microcomputer in a power supply mode.
4. The control system of the novel LED display screen according to claim 1, characterized in that: the master control network transformer, the sub-control input network transformer and the sub-control output network transformer respectively comprise a low-frequency channel and a high-frequency channel; the sleep signal and the wake-up signal are transmitted through the low-frequency channel, and the display control signal is transmitted through the high-frequency channel.
5. The novel dormancy method for the control system of the LED display screen is characterized by comprising the following steps:
a) the sleep awakening module receives a sleep signal and sends the sleep signal to the master control power converter and the master control network transformer; the master control network transformer transmits a sleep signal to the sub-control input network transformer;
b) the sub-control input network transformer sends a sleep signal to the module power supply single chip microcomputer, and the module power supply single chip microcomputer sends the sleep signal to the module power converter and the sub-control output network transformer; the sub-control network transformer transmits a sleep signal to a sub-control input network transformer of the next display module;
c) repeating the step b) for a plurality of times to enable all the module power converters to receive the sleep signals;
d) the main control power supply converter stops supplying power to the main control module after receiving the sleep signal, and the module power supply converter stops supplying power to the sub-control module and the display lamp panel after receiving the sleep signal.
6. The awakening method of the control system of the novel LED display screen based on claim 3, characterized by comprising the following steps:
a) the wake-up module receives a wake-up signal and sends the wake-up signal to the master control power converter and the master control network transformer; the master control network transformer sends a wake-up signal to the sub-control input network transformer;
b) the sub-control input network transformer sends a wake-up signal to the module power supply single chip microcomputer, and the module power supply single chip microcomputer sends the wake-up signal to the module power converter and the sub-control output network transformer; the sub-control network transformer sends the wake-up signal to a sub-control input network transformer of the next display module;
c) repeating the step b) for a plurality of times to enable all the module power converters to receive the wake-up signals;
d) the main control power supply converter recovers to supply power to the main control module after receiving the wake-up signal, and the module power supply converter recovers to supply power to the sub-control module and the display lamp panel after receiving the wake-up signal.
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| CN202010891972.XA CN112071258A (en) | 2020-08-31 | 2020-08-31 | Novel control system of LED display screen and dormancy method and awakening method thereof |
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| CN202010891972.XA CN112071258A (en) | 2020-08-31 | 2020-08-31 | Novel control system of LED display screen and dormancy method and awakening method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345370A (en) * | 2021-06-11 | 2021-09-03 | 杭州海康威视数字技术股份有限公司 | LED display device and low-power-consumption control method and control device thereof |
| CN113903282A (en) * | 2021-09-23 | 2022-01-07 | 西安诺瓦星云科技股份有限公司 | Display screen control method, module control card, display unit and display control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206820A (en) * | 2007-11-15 | 2008-06-25 | 复旦大学 | Distributed wireless LED display system |
| CN102148009A (en) * | 2010-02-05 | 2011-08-10 | 三星移动显示器株式会社 | Display device and driving method thereof |
| US20120274564A1 (en) * | 2011-04-29 | 2012-11-01 | Texas Instruments Incorporated | Activity Sensing Using Piezoelectric Sensors for Ultra Low Power Operation of Devices with Significant Inactivity Time |
| CN104103237A (en) * | 2014-06-12 | 2014-10-15 | 浙江远图智控系统有限公司 | Intelligent LED display system based on multi sensor data fusion |
| CN210273593U (en) * | 2019-08-14 | 2020-04-07 | 深圳市奥拓电子股份有限公司 | High-power supply circuit with low standby power consumption and LED display control system |
-
2020
- 2020-08-31 CN CN202010891972.XA patent/CN112071258A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206820A (en) * | 2007-11-15 | 2008-06-25 | 复旦大学 | Distributed wireless LED display system |
| CN102148009A (en) * | 2010-02-05 | 2011-08-10 | 三星移动显示器株式会社 | Display device and driving method thereof |
| US20120274564A1 (en) * | 2011-04-29 | 2012-11-01 | Texas Instruments Incorporated | Activity Sensing Using Piezoelectric Sensors for Ultra Low Power Operation of Devices with Significant Inactivity Time |
| CN104103237A (en) * | 2014-06-12 | 2014-10-15 | 浙江远图智控系统有限公司 | Intelligent LED display system based on multi sensor data fusion |
| CN210273593U (en) * | 2019-08-14 | 2020-04-07 | 深圳市奥拓电子股份有限公司 | High-power supply circuit with low standby power consumption and LED display control system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113345370A (en) * | 2021-06-11 | 2021-09-03 | 杭州海康威视数字技术股份有限公司 | LED display device and low-power-consumption control method and control device thereof |
| CN113345370B (en) * | 2021-06-11 | 2023-09-01 | 杭州海康威视数字技术股份有限公司 | LED display device, low-power consumption control method thereof and control device thereof |
| CN113903282A (en) * | 2021-09-23 | 2022-01-07 | 西安诺瓦星云科技股份有限公司 | Display screen control method, module control card, display unit and display control system |
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Application publication date: 20201211 |