CN111429833B - Method and device for reducing power consumption of LED display screen - Google Patents
Method and device for reducing power consumption of LED display screen Download PDFInfo
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- CN111429833B CN111429833B CN201811577209.9A CN201811577209A CN111429833B CN 111429833 B CN111429833 B CN 111429833B CN 201811577209 A CN201811577209 A CN 201811577209A CN 111429833 B CN111429833 B CN 111429833B
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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
- G09G2330/021—Power management, e.g. power saving
- G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
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- Controls And Circuits For Display Device (AREA)
Abstract
The invention relates to the technical field of electronic display equipment, in particular to a method and a device for reducing power consumption of an LED display screen, wherein the method comprises the following steps: receiving and detecting a display control signal at the current moment; judging whether the display screen is in a standby state or not according to the display control signal, if so, recording state information of the display screen, judging whether the state information at the current moment is consistent with the stored state information at the previous moment or not, and if so, stopping supplying power to the driving chip; the display data signal is acquired, the content of the display data is identified, and when the current display screen is identified to be in a standby state, the power supply to the driving chip is cut off, so that the driving chip can not consume electric energy, the overall power consumption of the display screen in the standby state is effectively reduced, the energy consumption is saved, meanwhile, the reverse voltage applied to the LED lamp bead is reduced, and the service life of the display screen is prolonged.
Description
Technical Field
The invention relates to the technical field of electronic display equipment, in particular to a method for reducing power consumption of an LED display screen and a device for reducing the power consumption of the LED display screen.
Background
With the development of electronic technology, the LED display screen is widely used in home entertainment, outdoor advertising, and other occasions due to its characteristics of high brightness, small size, and convenient installation and maintenance. The LED display screen is composed of a plurality of LED lamp beads which are arranged vertically and horizontally; every LED lamp pearl all is connected with driver chip, and this driver chip is used for controlling the operating condition of LED lamp pearl.
In the existing LED display screen, the devices with the most power consumption mainly comprise a driving chip and an LED lamp bead; according to the power control mode of the existing LED display screen, when the LED lamp beads are in a non-luminous state, the LED lamp beads still can supply power to the driving chip, so that the driving chip still can consume electric quantity, meanwhile, due to the fact that the driving chip is provided with the pre-charging circuit, when the driving chip is powered on, the LED lamp beads connected with the driving chip can bear larger reverse voltage, the longer the time when the LED lamp beads bear the reverse voltage, the higher the voltage, and the shorter the service life of the LED lamp beads.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks, the present invention provides a method and an apparatus for cutting off power supply to a driving chip when an LED display is in standby mode.
The purpose of the invention is realized by the following technical scheme:
the invention relates to a method for reducing power consumption of an LED display screen, which comprises the following steps:
receiving and detecting a display control signal at the current moment;
judging whether the display screen is in a standby state or not according to the result of receiving the display control signal, and recording the state information of the display screen if the display screen is in the standby state;
and judging whether the state information at the current moment is consistent with the stored state information at the previous moment, and if so, stopping supplying power to the driving chip.
The invention relates to a device for reducing power consumption of an LED display screen, which comprises:
the data receiving module is used for receiving the display control signal at the current moment;
the data storage module is connected with the data receiving module and used for judging whether the display screen is in a standby state or not according to the display control signal, and if the display screen is in the standby state, the data storage module stores state information of the display screen;
the data comparison module is connected with the data storage module and is used for judging whether the state information at the current moment is consistent with the state information at the previous moment or not, and if so, generating an energy-saving control signal;
and the energy-saving control module is respectively connected with the data comparison module and the driving chip and used for stopping supplying power to the driving chip according to the energy-saving control signal.
The invention acquires the display data signal, identifies the content of the display data, and cuts off the power supply to the driving chip when the current display screen is identified to be in the standby state, so the driving chip can not consume electric energy, the whole power consumption of the display screen in the standby state is effectively reduced, the energy consumption is saved, and meanwhile, the reverse voltage borne by the LED lamp bead is reduced, and the service life of the display screen is greatly prolonged.
Drawings
For the purpose of easy explanation, the present invention will be described in detail with reference to the following preferred embodiments and the accompanying drawings.
FIG. 1 is a schematic diagram of a working flow of an embodiment of a method for reducing power consumption of an LED display screen according to the present invention;
FIG. 2 is a schematic view of a work flow of another embodiment of the method for reducing power consumption of an LED display screen according to the present invention;
FIG. 3 is a schematic diagram of a logic structure of an embodiment of an apparatus for reducing power consumption of an LED display screen according to the present invention;
FIG. 4 is a schematic logic diagram of another embodiment of the apparatus for reducing power consumption of an LED display panel according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more 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 invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
An embodiment of the method for reducing power consumption of an LED display screen according to the present invention is described in detail below with reference to fig. 1, which includes:
s101, receiving display control signals
Receiving and detecting the display control signal at the current moment through a receiving card; wherein the display control signal includes: gray scale clock signals, latch signals, row tube control signals and gray scale data signals of red lamps, green lamps and blue lamps;
s102, judging whether the display screen is in a standby state or not
Judging whether the display screen is in a standby state or not according to the result of receiving the display control signal, and if the receiving card does not receive any display control signal at the current moment, defining the working state of the display screen at the current moment as the standby state;
s103, judging whether the state information is consistent with the previous moment
If the display screen is in the standby state, recording the state information of the display screen, and judging whether the state information at the current moment is consistent with the stored state information at the previous moment, namely judging whether the working state of the display screen at the previous moment is also in the standby state;
s104, stopping supplying power to the driving chip
If the current is consistent with the current in the driving chip, the driving chip stops supplying power, and specifically, the MOS tube connected to the driving chip is disconnected, so that no current enters the driving chip on the driving chip, the current input in the driving chip is cut off at the time when the display screen is in a standby state, the driving chip is in an inoperative state, and the power consumption of the display screen at the standby time is reduced.
For better illustration of the present invention, a method for reducing power consumption of an LED display screen according to another embodiment of the present invention is described in detail below, with reference to fig. 2, which includes:
s201, receiving a display control signal at a moment
In the existing display screen, after image data of each frame sequentially passes through a video processor and a sending card, the image data is sent to a receiving card, and the receiving card continuously receives and detects a frame of display control signals at each moment; wherein the display control signal includes: gray scale clock signals, latch signals, row tube control signals and gray scale data signals of red lamps, green lamps and blue lamps;
s202, filtering the display control signal
The received display control signal is filtered, because the gray scale clock signal and the clock signal sent by the receiving card are easily interfered by external waveforms in the receiving process, a small peak appears when the signal is subjected to an external interference signal in the falling edge process, the driving column chip can be regarded as a low level when the signal is in the falling edge process, but when the peak signal appears, the driving column chip can regard the peak as a new pulse signal, so that the problems of signal matching, matching and false operation of the chip can be caused; in order to prevent the phenomenon, a relevant filtering algorithm is added into MCU software through an RC filtering circuit to correct the waveform, eliminate relevant interference signals and output the corrected waveform again;
s203, storing the display control signal at the current moment
Storing the display control signal after filtering; then returning to the step S201, receiving and detecting a frame of display control signal at the next moment by the receiving card;
s204, judging whether a display control signal is received or not
The MCU judges whether a display control signal sent by the receiving card is received, if the display control signal is not received, the judgment result is set to be in a standby state, and if the display control signal is in the standby state, the step S207 is carried out, and power supply to the driving chip is stopped. The method comprises the following steps: when the MCU detects that the row management control signal or the gray clock signal is all 0 in one frame of data, the MCU judges that the display control signal sent by the receiving card does not exist at the moment, and the receiving card does not work, and sets the judgment result to be in a standby state;
s205, judging whether any gray data information is 0
If the display control signal is received, acquiring gray data information in the display control signal;
and judging whether the gray data information is a preset value or not, and if so, setting the judgment result to be in a standby state. When the MCU detects that the control signals of the row tubes are not all 0, the MCU judges that the control card works at the moment, the data information of the gray signal is detected, if the fact that the gray data in the current frame is not 0 is detected, image data need to be displayed when the situation is shown, and the judgment result is set to be in a non-standby state; sending the display control signal at the current moment to a driving chip, and carrying out step S208. displaying the content of the current gray data information; if any gray data in the current frame is detected to be 0, the color is displayed without data, and the judgment result is set to be in a standby state; step S206, judging whether the state information is consistent with the previous moment;
s206, judging whether the state information is consistent with the previous moment
If the display screen is in the standby state, storing the state information of the display screen at the current moment, and judging whether the state information at the current moment is consistent with the stored state information at the previous moment, namely judging whether the working state of the display screen at the previous moment is also in the standby state; if so, performing step S207, stopping supplying power to the driving chip; if the display control signals are inconsistent, the stored display control signals at the previous moment are sent to a driving chip; and S208, displaying the content of the current gray data information;
s207, stopping supplying power to the driving chip
The power supply to the driving chip is stopped, specifically, the MOS tube connected to the driving chip is disconnected, so that no current enters the driving chip on the driving chip, the current input in the driving chip is cut off at the standby time of the display screen, the driving chip is in an inoperative state, and the power consumption of the display screen at the standby time is reduced.
S208, displaying according to the content of the gray data
The driving chip drives the LED lamp beads to display according to the content of the received gray data information; the receiving card receives the sending clock signal, the gray data and the like and sends the signals to the MCU and the driving chip, the driving chip displays the gray data and the gray clock signal which are sent by the receiving card, the latch signal and the row management control signal, wherein the gray clock signal, the latch signal and the row management control signal control the row management and the driving chip, if the row management is opened and the driving chip is opened, the corresponding LED lamp bead is lightened, and the gray data is displayed.
An embodiment of an apparatus for reducing power consumption of an LED display panel according to the present invention is described in detail below, with reference to fig. 3, which includes:
a data receiving module 301, where the data receiving module 301 is configured to receive a display control signal at a current time; receiving gray clock signals, latch signals, row management control signals, gray data signals of red lamps, green lamps and blue lamps and other display control signals through a receiving card;
the data storage module 302, the data storage module 302 is connected with the data receiving module 301, and is configured to determine whether a display screen is in a standby state according to the display control signal, and if the display screen is in the standby state, store state information of the display screen; the data storage module 302 is arranged in the MCU, and when the MCU detects that the data of the row management control signal or the gray scale clock signal is all 0 in a frame of data, the MCU determines that the display control signal transmitted by the receiving card does not exist at this time, and the receiving card does not operate, and sets the determination result to a standby state; when the MCU detects that the control signals of the row tubes are not all 0, the MCU judges that the control card works at the moment, the data information of the gray signal is detected, if the fact that the gray data in the current frame is not 0 is detected, image data need to be displayed when the situation is shown, and the judgment result is set to be in a non-standby state; if any gray data in the current frame is detected to be 0, the color is displayed without data, and the judgment result is set to be in a standby state;
the data comparison module 303, where the data comparison module 303 is connected to the data storage module 302, and is configured to determine whether the state information at the current time is consistent with the state information at the previous time, and if so, generate an energy-saving control signal;
the energy-saving control module 304, the energy-saving control module 304 is respectively connected with the data comparison module 303 and the driving chip, and is configured to stop supplying power to the driving chip according to the energy-saving control signal; the MOS tube connected to the driving chip is disconnected, so that no current on the driving chip enters the driving chip.
Referring to fig. 4, in the present embodiment, the apparatus further includes:
a signal filtering module 305, where the signal filtering module 305 is connected between the data receiving module 301 and the data storing module 302, and is configured to filter the received display control signal. The gray scale clock signal and the clock signal sent by the receiving card are easily interfered by external waveforms in the receiving process, a small peak appears when the signal is subjected to an external interference signal in the falling edge process, the driving column chip is regarded as a low level when the signal falls, but the peak appears when the peak signal appears, the driving column chip regards the peak as a new pulse signal, so that the problems of signal matching, matching and chip misoperation are caused; in order to prevent the phenomenon, a relevant filtering algorithm is added into MCU software through an RC filtering circuit to correct the waveform, eliminate relevant interference signals and output the corrected waveform again.
And the display driving module 306, where the display driving module 306 is connected to the data comparing module 303, and is configured to drive the driving chip to display the content of the display control signal when the display screen is in a non-standby state. The receiving card receives the sending clock signal, the gray data and the like and sends the signals to the MCU and the driving chip, the driving chip displays the gray data and the gray clock signal which are sent by the receiving card, the latch signal and the row management control signal, wherein the gray clock signal, the latch signal and the row management control signal control the row management and the driving chip, if the row management is opened and the driving chip is opened, the corresponding LED lamp bead is lightened, and the gray data is displayed.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A method for reducing power consumption of an LED display screen is characterized by comprising the following steps:
receiving and detecting a display control signal at the previous moment, wherein the display control signal corrects a waveform through an RC filter circuit and a filter algorithm added in MCU software, and interference signals are eliminated;
judging whether the display screen is in a standby state or not according to the display control signal, and if so, storing state information at the current moment;
receiving and detecting a display control signal at the current moment;
judging whether the display screen is in a standby state or not according to the result of receiving the display control signal, and recording the state information of the display screen if the display screen is in the standby state;
and judging whether the state information at the current moment is consistent with the stored state information at the previous moment, and if so, stopping supplying power to the driving chip.
2. The method of claim 1, wherein the determining whether the state information at the current time is consistent with the stored state information at the previous time further comprises:
and if the two signals are not consistent, supplying power to the driving chip.
3. The method of claim 2, wherein the determining whether the display screen is in a standby state further comprises:
and if the driver chip is in a non-standby state, supplying power to the driver chip.
4. The method for reducing power consumption of the LED display screen according to claim 3, wherein the judging whether the display screen is in a standby state comprises:
and if the display control signal is not received, setting the judgment result to be in a standby state.
5. The method of claim 4, wherein the determining whether the display screen is in a standby state further comprises:
if the display control signal is received, acquiring gray data information in the display control signal;
and judging whether the gray data information is a preset value or not, and if so, setting the judgment result to be in a standby state.
6. The method for reducing power consumption of an LED display screen according to claim 5, wherein the receiving the display control signal at the current time comprises:
and filtering the received display control signal.
7. An apparatus for reducing power consumption of an LED display screen, comprising:
the data receiving module is used for receiving and detecting a display control signal at the previous moment, wherein the display control signal corrects a waveform through an RC filter circuit and a filter algorithm added in MCU software, so that an interference signal is eliminated; judging whether the display screen is in a standby state or not according to the display control signal, and if so, storing state information at the current moment; receiving a display control signal at the current moment;
the data storage module is connected with the data receiving module and used for judging whether the display screen is in a standby state or not according to the display control signal, and if the display screen is in the standby state, the data storage module stores state information of the display screen;
the data comparison module is connected with the data storage module and is used for judging whether the state information at the current moment is consistent with the state information at the previous moment or not, and if so, generating an energy-saving control signal;
and the energy-saving control module is respectively connected with the data comparison module and the driving chip and used for stopping supplying power to the driving chip according to the energy-saving control signal.
8. The apparatus for reducing power consumption of an LED display screen according to claim 7, further comprising:
and the signal filtering module is connected between the data receiving module and the data storage module and is used for filtering the received display control signal.
9. The apparatus for reducing power consumption of an LED display screen according to claim 8, further comprising:
and the display driving module is connected with the data comparison module and used for driving the driving chip to display the content of the display control signal when the display screen is in a non-standby state.
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| CN201811577209.9A CN111429833B (en) | 2018-12-21 | 2018-12-21 | Method and device for reducing power consumption of LED display screen |
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| CN201811577209.9A CN111429833B (en) | 2018-12-21 | 2018-12-21 | Method and device for reducing power consumption of LED display screen |
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| CN112037708A (en) * | 2020-08-31 | 2020-12-04 | 东莞阿尔泰显示技术有限公司 | Control system for improving LED display screen and dormancy method and awakening method thereof |
| CN112309308B (en) | 2020-11-18 | 2023-07-28 | 京东方科技集团股份有限公司 | Display device, driving method thereof and display system |
| CN112583995B (en) * | 2020-12-21 | 2022-01-04 | 杭州视芯科技股份有限公司 | LED display system and data communication method |
| CN117939731A (en) * | 2022-10-13 | 2024-04-26 | 华润微集成电路(无锡)有限公司 | Power consumption control circuit, chip and electronic equipment |
| CN116884341B (en) * | 2023-09-06 | 2024-01-05 | 长春希达电子技术有限公司 | Wall-mounted LED display device and method |
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