CN105445987A - Automatic protection method and device of liquid crystal spliced screen - Google Patents
Automatic protection method and device of liquid crystal spliced screen Download PDFInfo
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- CN105445987A CN105445987A CN201610008394.4A CN201610008394A CN105445987A CN 105445987 A CN105445987 A CN 105445987A CN 201610008394 A CN201610008394 A CN 201610008394A CN 105445987 A CN105445987 A CN 105445987A
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- power
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- time expand
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses an automatic protection method of a liquid crystal spliced screen, which is applied to applied to a driver board card of each single screen. The method comprises: obtaining an electrifying prolonging time of the single screen after electrifying, wherein the obtained electrifying prolonging time is a random value larger than zero; delaying to lighten the single screen according to the obtained electrifying prolonging time. The invention further provides a device corresponding to the method, the automatic protection method and device have the advantages that the probability that respective single screens are electrified at the same time is greatly reduced without causing damage to the driver board card or impacting a power supply system.
Description
Technical field
The present invention relates to screen splicing technical field, particularly relate to automatic protecting method and the device of liquid crystal-spliced screen.
Background technology
Liquid crystal-spliced screen products is widely used in field of video monitoring, after usually single screen being arranged on support, unifies the power lead charity of each single screen in insert row group when the project implementation.Send instruction by telepilot (or serial server), unified switching on and shutting down operation is implemented to all single screens.In practical operation, because all single screens carry out startup and shutdown operation all concomitantly, can form transient high-current to electric power system, cause burning of the damage of electric power system and single screen Driver Card, more serious even can cause fire.
For addressing this problem in prior art, the Driver Card of every block single screen increasing the hardware unit of big current protection, realizing the protection of concurrent big current.The shortcoming of this mode is; one is the increase in hardware cost; two are range of current that the hardware unit of current protection can be protected is limited; can not infinitely increase; in a fairly large number of large project construction of screen body; also cannot play the effect of current protection, still there is drive plate by the risk of smashing.
Therefore, prior art problem is, the safety cannot carrying out mosaic screen quickly and easily powers on, and easily causes Driver Card to burn.
Summary of the invention
In order to solve prior art Problems existing, now providing a kind of automatic protecting method, powering on to realize safety quickly and easily.
An automatic protecting method for liquid crystal-spliced screen, is applied in the Driver Card of each single screen, comprises:
Obtain the powering on time expand of single screen after the power-up, wherein the obtained time expand that powers on be greater than zero random value;
The single screen at place is lighted according to the obtained time expand time delay that powers on.
The supply voltage of Driver Card and electric current are very little, therefore, even if the Driver Card of multiple single screen powers on simultaneously, also can not cause the breaking-up of Driver Card or impact electric power system.Each Driver Card after power-up, by obtaining random time expand, single screen is made to power on into row stochastic time delay, the Probability maximum simultaneously powered between each single screen is reduced, even if accidentally there is identical power-on time between each single screen, also huge rush of current can not be caused to Driver Card.Because delay time is that Driver Card calculates acquisition automatically, also be that Driver Card directly carries out lighting single screen after a delay, therefore do not need manually to open each single screen one by one, process have also been obtained great simplification, thus achieve safe quickly and easily powering on.
Furthermore, described in time expand that powers on be and be greater than zero and the random number being less than or equal to preset value, wherein preset value is greater than zero.
In order to make the delayed of each single screen be in a close scope, the delay time therefore arranged should be in a preset value.Such as can be set between 2 seconds to 5 seconds, thus the longest time expand of each single screen, can not exceed this preset value, ensures the start-up time of each single screen relatively.
Furthermore, described in the power on obtain manner of time expand be obtain one and be greater than 0 and be less than or equal to the random coefficient value of 1, preset value is multiplied by random coefficient value and obtains powering on the numerical value of time expand.
By adopting random coefficient value to ensure that all time expands are all not more than preset value, such as preset value is 2 seconds, and the random coefficient value obtained is 0.5, and time expand is 1 second, and this single screen will power on and light within 1 second.
Furthermore, also comprise:
After receiving power-off signal, obtain the power-off time expand of single screen, wherein obtained power-off time expand be greater than zero random value;
According to obtained power-off time expand time delay to the single screen power-off at place.
When shutting down, if carry out power-off to all single screens simultaneously, also can cause the impact to electric power system, therefore, carrying out random delay power-off equally, power-off time between each single screen is staggered, also just avoiding causing damage to electric power system.Wherein the method for power cut off delay can be identical with delayed method.
Furthermore, the power-off signal received is wireless signal.
Wireless signal comprises infrared signal, Bluetooth signal, Wi-Fi signal or 4G signal.By wireless transmission power-off signal, each Driver Card can be made to carry out remote control, and each Driver Card can receive power-off signal simultaneously, make the mosaic screen with more single screen automatically can carry out follow-up process.
For implementing method of the present invention, present invention also offers corresponding automatic safety device, to realize Driver Card and electric power system conveniently protective effect.
An automatic safety device for liquid crystal-spliced screen, is applied in the Driver Card of each single screen, comprises:
Delayed unit, obtains the powering on time expand of single screen after the power-up, wherein the obtained time expand that powers on be greater than zero random value;
Upper electric unit, lights the single screen at place according to the obtained time expand time delay that powers on.
Furthermore, the time expand that powers on described in delayed unit obtains, is and is greater than zero and the random number being less than or equal to preset value, and wherein preset value is greater than zero.
Furthermore, the mode of time expand of powering on described in delayed unit obtains is obtain one and be greater than 0 and be less than or equal to the random coefficient value of 1, preset value is multiplied by random coefficient value and obtains powering on the numerical value of time expand.
Furthermore, also comprise:
Power cut off delay unit, obtains the power-off time expand of single screen after receiving power-off signal, wherein obtained power-off time expand be greater than zero random value;
Power-off unit, according to obtained power-off time expand time delay to the single screen power-off at place.
Furthermore, the power-off signal that power cut off delay unit receives is wireless signal.
The invention has the advantages that, the Probability maximum simultaneously powered on is reduced, can not cause the breaking-up of Driver Card or electric power system is impacted between each single screen.Even if accidentally there is identical power-on time between each single screen, also huge rush of current can not be caused to Driver Card; Because delay time is that Driver Card calculates acquisition automatically, also be that Driver Card directly carries out lighting single screen after a delay, therefore do not need manually to open each single screen one by one, process have also been obtained great simplification, thus achieve safety quickly and easily and power on, the delay time of single screen is within a controlled scope.
Accompanying drawing explanation
Fig. 1 is the mosaic screen schematic diagram of one embodiment of the invention;
The connection diagram of mosaic screen when Fig. 2 is present example power process.
Embodiment
For making the present invention clear more in detail, now in conjunction with the accompanying drawings and embodiments further explanation is explained to the present invention.
Present example, for the liquid crystal-spliced screen of 3*3 scale in Fig. 1, is linked in sequence by RS232 serial ports between each single screen forming liquid crystal-spliced screen, and retaining ring is led to.The Driver Card of each single screen there are two serial ports, one is defined as up serial ports by Driver Card, one is defined as descending serial ports by Driver Card, in mosaic screen, single screen connects the up serial ports of next single screen by the descending serial ports of previous single screen during serial ports articulating, and can carry out bidirectional data communication by Serial Port Line by two single screens that serial ports is connected.
When the unified start of mosaic screen; the principle that single screen powers on is: after single screen powers on; first the Driver Card of each single screen is started; the module group backlight of place single screen is lighted again by Driver Card; thus realize single screen and to power on display; what will stress here is a bit that the power of Driver Card is very little, and the single screen main power source that powers on is that module group backlight lights brought power, so focus on the mistiming of lighting at single screen module at the automatic safety device of the Driver Card of single screen.
The method of present example is implemented on automatic safety device, and wherein automatic safety device comprises: delayed unit, upper electric unit, power cut off delay unit and power-off unit.After all Driver Card electrifying startups of mosaic screen group, the Driver Card delayed unit of every block single screen all can obtain a time expand random.Because time expand mainly plays, each single screen power-on time is staggered, so there is no necessary oversize, in order to ensure that each single screen time expand is in a comparatively close time range, a preset value can be set, time expand is made to be less than or equal to random value in values being greater than 0, the preset value (start widow time) of the current utility model that delayed unit adopts is 2 seconds, the time delay coefficient value then obtained is the non-zero values in 0-1 interval, and wherein this random non-zero values is 1 to the maximum.This numerical value is multiplied with the start widow time preset, namely obtains a random delay on time.The random value that such as certain block single screen obtains is 0.5, then the random delay on time is then 1s, also just means that the upper electric unit of this Driver Card can open backlight again in 1 second by the time delay of delayed unit after Driver Card starts, single screen is powered on.And other single screen idol random value can be such as 0.2,0.4,0.7 etc., what correspondence obtained power on, and time expand is 0.4 second, 0.8 second, 1.4 seconds.The opening time of single screens all so especially module group backlight on the on time all possesses random value, guarantees the situation that can not occur transient high-current at synchronization, to reach the protective effect of total system.Even if accidentally there is identical power-on time between each single screen, also huge rush of current can not be caused to Driver Card.
In like manner, liquid crystal-spliced group can adopt the mode of manually closing one by one, although can ensure to cause transient high-current like this, but also extremely take time and effort.When shutting down, if carry out power-off to all single screens simultaneously, also can cause the impact to electric power system, therefore, carrying out random delay power-off equally, power-off time between each single screen is staggered, also just avoiding causing damage to electric power system.
Therefore as shown in Figure 2, liquid crystal-spliced group of present example can be carried out infrared remote by Infrared remote controller and control, or is controlled by server (PC) by client.Other implementations also can adopt other wireless signal such as Bluetooth signal, Wi-Fi signal or 4G signal.By wireless transmission power-off signal, each Driver Card can be made to carry out remote control, and each Driver Card can receive power-off signal simultaneously, make the mosaic screen with more single screen automatically can carry out follow-up process.
During single screen unification shutdown, the preset value (shutdown widow time) of present example setting is 2 seconds, power-off signal is sent to the mosaic screen group worked of 3*3 scale by Infrared remote controller, after the single screen of external infrared remote receiver receives unified shutdown command, transmit power-off signal successively to the single screen be connected by the up serial ports between single screen and descending shutdown serial ports, make each single screen in liquid crystal-spliced screen obtain shutdown command.The time interval that each single screen receives power-off signal is very short, if therefore just carry out power-off once receive power-off signal, still can apply for card to driving and impact, therefore in the present example, after every block single screen power cut off delay unit receives this power-off signal, can in a 0-1 interval random acquisition non-zero values, this numerical value is multiplied with shutdown widow time, namely a random delay power-off time is obtained, the random value that such as certain block single screen obtains is 0.5, then random delay power-off time is then 1s, also just mean that this single screen understands time delay 1 second after receiving shutdown command, close backlight again, make single screen power-off.Single screens all so all possesses random value on the unused time, guarantees the situation that can not occur transient high-current at synchronization, to reach the protective effect of total system.
The invention has the advantages that, the Probability maximum simultaneously powered on is reduced, can not cause the breaking-up of Driver Card or electric power system is impacted between each single screen.Even if accidentally there is identical power-on time between each single screen, also huge rush of current can not be caused to Driver Card; Because delay time is that Driver Card calculates acquisition automatically, also be that Driver Card directly carries out lighting single screen after a delay, therefore do not need manually to open each single screen one by one, process have also been obtained great simplification, thus achieve safety quickly and easily and power on, the delay time of single screen is within a controlled scope.
Claims (10)
1. an automatic protecting method for liquid crystal-spliced screen, is applied in the Driver Card of each single screen, it is characterized in that, comprising:
Obtain the powering on time expand of single screen after the power-up, wherein the obtained time expand that powers on be greater than zero random value;
The single screen at place is lighted according to the obtained time expand time delay that powers on.
2. the automatic protecting method of liquid crystal-spliced screen as claimed in claim 1, is characterized in that, described in time expand that powers on be and be greater than zero and the random number being less than or equal to preset value, wherein preset value is greater than zero.
3. the automatic protecting method of liquid crystal-spliced screen as claimed in claim 2; it is characterized in that; the obtain manner of the described time expand that powers on is, obtains one and is greater than 0 and is less than or equal to the random coefficient value of 1, preset value is multiplied by random coefficient value and obtains powering on the numerical value of time expand.
4. the automatic protecting method of liquid crystal-spliced screen as described in any one of claims 1 to 3, is characterized in that, also comprise:
After receiving power-off signal, obtain the power-off time expand of single screen, wherein obtained power-off time expand be greater than zero random value;
According to obtained power-off time expand time delay to the single screen power-off at place.
5. the automatic protecting method of liquid crystal-spliced screen as claimed in claim 4, it is characterized in that, the power-off signal received is wireless signal.
6. an automatic safety device for liquid crystal-spliced screen, is applied in the Driver Card of each single screen, it is characterized in that, comprising:
Delayed unit, obtains the powering on time expand of single screen after the power-up, wherein the obtained time expand that powers on be greater than zero random value;
Upper electric unit, lights the single screen at place according to the obtained time expand time delay that powers on.
7. the automatic safety device of liquid crystal-spliced screen as claimed in claim 6, is characterized in that, the time expand that powers on described in delayed unit obtains is and is greater than zero and the random number being less than or equal to preset value, and wherein preset value is greater than zero.
8. the automatic safety device of liquid crystal-spliced screen as claimed in claim 7; it is characterized in that; the mode of time expand of powering on described in delayed unit obtains is obtain one and be greater than 0 and be less than or equal to the random coefficient value of 1, preset value is multiplied by random coefficient value and obtains powering on the numerical value of time expand.
9. the automatic safety device of liquid crystal-spliced screen as described in any one of claim 6 to 8, is characterized in that, also comprise:
Power cut off delay unit, obtains the power-off time expand of single screen after receiving power-off signal, wherein obtained power-off time expand be greater than zero random value;
Power-off unit, according to obtained power-off time expand time delay to the single screen power-off at place.
10. the automatic safety device of liquid crystal-spliced screen Driver Card as claimed in claim 9, it is characterized in that, the power-off signal that power cut off delay unit receives is wireless signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008394.4A CN105445987A (en) | 2016-01-07 | 2016-01-07 | Automatic protection method and device of liquid crystal spliced screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008394.4A CN105445987A (en) | 2016-01-07 | 2016-01-07 | Automatic protection method and device of liquid crystal spliced screen |
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| CN105445987A true CN105445987A (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610008394.4A Pending CN105445987A (en) | 2016-01-07 | 2016-01-07 | Automatic protection method and device of liquid crystal spliced screen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108255242A (en) * | 2018-01-19 | 2018-07-06 | 广州视源电子科技股份有限公司 | A kind of intelligent interaction tablet and information processing method |
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| WO2011162166A1 (en) * | 2010-06-25 | 2011-12-29 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and electronic appliance |
| CN102480361A (en) * | 2010-11-30 | 2012-05-30 | 英业达股份有限公司 | Power control method of multiple servers |
| CN102938240A (en) * | 2012-11-08 | 2013-02-20 | 四川长虹电子系统有限公司 | Method for suppressing impulse current of splicing system |
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2016
- 2016-01-07 CN CN201610008394.4A patent/CN105445987A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004302217A (en) * | 2003-03-31 | 2004-10-28 | Matsushita Electric Ind Co Ltd | Image display device |
| CN101815398A (en) * | 2009-02-23 | 2010-08-25 | 北京核杭新技术研究所 | Method for starting HID lamp randomly and control device thereof |
| WO2011162166A1 (en) * | 2010-06-25 | 2011-12-29 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and electronic appliance |
| CN102480361A (en) * | 2010-11-30 | 2012-05-30 | 英业达股份有限公司 | Power control method of multiple servers |
| CN201984782U (en) * | 2011-01-10 | 2011-09-21 | 深圳市洲明科技股份有限公司 | Time sharing starting system for LED (light-emitting diode) display screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108255242A (en) * | 2018-01-19 | 2018-07-06 | 广州视源电子科技股份有限公司 | A kind of intelligent interaction tablet and information processing method |
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Application publication date: 20160330 |