CN104835463A - Dual-redundancy LCD driving system - Google Patents
Dual-redundancy LCD driving system Download PDFInfo
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- CN104835463A CN104835463A CN201510188753.4A CN201510188753A CN104835463A CN 104835463 A CN104835463 A CN 104835463A CN 201510188753 A CN201510188753 A CN 201510188753A CN 104835463 A CN104835463 A CN 104835463A
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Abstract
The invention discloses a dual-redundancy LCD driving system. The driving system comprises an OR gate circuit, a power supply circuit and a driving circuit. The OR gate circuit receives two ways of voltage signals, and outputs out two ways of starting signals when any way of voltage signals is normal. The power supply circuit is configured to be connected with the OR gate circuit to receive the starting signals and output working voltage in two ways. The driving circuit is configured to be connected with the power supply circuit to receive the output working voltage in two ways and output the working voltage to an LCD through selection. The dual-redundancy LCD driving system overcomes problems that failures and faults easily occur to a driving system in the prior art, and improves the reliability, security and practicality of an onboard display.
Description
Technical field
The present invention relates to military LCD display system, particularly, relate to a kind of two redundancy LCD drive system.
Background technology
In recent years, along with the fast development of avionics, reliability design, Redundancy Design, permeate completely in the design platform of military field.And along with Aeronautics and Astronautics field, the requirement of the aspects such as the reliability of TFT-LCD drive system, security, maturity and practicality is improved, can not meet request for utilization for traditional design.
For traditional TFT-LCD drive system, be only limitted to the request for utilization of developing applicable various aircraft or opportunity of combat, but the normal use under redundancy backup pattern can not be met or under extreme case.Traditional TFT-LCD drive system, if each functional part or components and parts working properly, then whole TFT-LCD drive system can normally work; If certain part or device failure or operation irregularity, then whole TFT-LCD drive system lost efficacy, and display is abnormal.In addition, the TFT-LCD manufacturer in the whole world, just carries out design LCD drive system for specific liquid crystal display, considers cost, design complexities or other factors, can not increase Redundancy Design, certainly also comprises ripe COTS product.And for military field, there is certain defect in this kind of design.
Summary of the invention
The object of this invention is to provide a kind of two redundancy LCD drive system, this pair of redundancy LCD drive system overcomes drive system of the prior art and easily occurs losing efficacy and the problem of fault, improves the reliability of airborne indicator, security and practicality.
To achieve these goals, the invention provides a kind of two redundancy LCD drive system, this drive system comprises: OR circuit, and described OR circuit receives two-way voltage signal, and when described in any road, voltage signal is normal, then described OR circuit exports two-way enabling signal; Power-supplying circuit, described power-supplying circuit is configured to be connected to described OR circuit, receives described enabling signal and point two-way output services voltage with a point two-way; Driving circuit, described driving circuit is configured to be connected to described power-supplying circuit, receives output services voltage described in two-way and export to described LCD by selection with point two-way.
Preferably, described power-supplying circuit comprises: two-way voltage conversion system, voltage conversion system described in two-way is connected to described two-way enabling signal, with receive described enabling signal and the voltage of formation logic IC circuit working, gamma principal voltage, for opening the maximum on-state voltage of sweep trace and the minimum standoff voltage for turning off sweep trace.
Preferably, this drive system also comprises: the first MUX, and described first MUX is configured to be connected between described driving circuit and LCD, to select to export to described LCD.
Preferably, this drive system also comprises: the second MUX receives described vision signal and control signal, and is configured to be connected to described driving circuit, described vision signal and control signal to be selected to export to described driving circuit.
Preferably, this drive system also comprises: intelligent monitoring device, described intelligent monitoring device is configured to be connected to described voltage conversion system and driving circuit, with the output signal of the operating voltage and described driving circuit of monitoring the output of described voltage conversion system.
Preferably, the model of described OR circuit is LTC4352.
By above-mentioned embodiment, there is the input of 1 road supply voltage normal as long as of the present invention pair of redundancy LCD drive system makes it meet, so export also normal, avoid the LCD device work caused due to environmental problem abnormal, improve reliability and the serviceable life of LCD drive system in military field.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structured flowchart of the embodiment that of the present invention pair of redundancy LCD drive system is described.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
The invention provides a kind of two redundancy LCD drive system, this drive system comprises: OR circuit, and described OR circuit receives two-way voltage signal, and when described in any road, voltage signal is normal, then described OR circuit exports two-way enabling signal;
Power-supplying circuit, described power-supplying circuit is configured to be connected to described OR circuit, receives described enabling signal and point two-way output services voltage with a point two-way;
Driving circuit, described driving circuit is configured to be connected to described power-supplying circuit, receives output services voltage described in two-way and export to described LCD by selection with point two-way.
This invention greatly reduces kind and the quantity of LCD system components and parts or function element, improve reliability and the serviceable life of LCD drive system in military field, and there is the features such as reliability is high, security is high, integrated level is good, for the reliability of airborne indicator LCD Driving Scheme and redundancy design provide reliable solution.
LCD drives, VCOM and GAMMA produces circuit part, LCD driving comprises liquid crystal deflection reference voltage VCOM and generates, the generation of the generation of GTG GAMMA voltage and Drive of row and column signal (signal sequence), these signals export to MUX by intelligent monitoring device, LCD is exported to via MUX, in addition, the vision signal of outside input and control signal, LCD drive part is inputed to equally by MUX, ensure that input source also has 2 to overlap independently path, add reliability and the redundancy of LCD driving.
Below in conjunction with accompanying drawing, 1 couple of the present invention is further detailed, in the present invention, in order to meet military field and various human factor and environmental requirement, the present invention is that Redundancy Design provides good design philosophy, it is not only Redundancy Design and provides approach and platform, and provide direction for integrated Combined design, improve the reliability of airborne indicator, security and practicality.
In this kind of embodiment, described power-supplying circuit can comprise: two-way voltage conversion system, voltage conversion system described in two-way is connected to described two-way enabling signal, to receive described enabling signal and the voltage of formation logic IC circuit working, gamma principal voltage, for opening the maximum on-state voltage of sweep trace and the minimum standoff voltage for turning off sweep trace, power conversion system and generation LCD required voltage signal, comprise logic IC circuit voltage 3.3V, the gamma principal voltage AVDD of pixel voltage on data line, sweep trace is opened the maximum on-state voltage VGH of TFT, for turning off the minimum standoff voltage VGL of TFT on sweep trace, then these voltage signals are exported to MUX by intelligent monitoring device, LCD is exported to finally by by MUX, ensure the normal display of LCD.
In this kind of embodiment, this drive system can also comprise: the first MUX, described first MUX is configured to be connected between described driving circuit and LCD, to select to export to described LCD, selects which specifically selects export to described LCD according to control signal.
In this kind of embodiment, this drive system can also comprise: the second MUX receives described vision signal and control signal, and be configured to be connected to described driving circuit, described vision signal and control signal to be selected to export to described driving circuit, reception control signal realizes selecting the output signal of outlet line to export.
In this kind of embodiment, this drive system can also comprise: intelligent monitoring device, described intelligent monitoring device is configured to be connected to described voltage conversion system and driving circuit, with the output signal of the operating voltage and described driving circuit of monitoring the output of described voltage conversion system, in case there is voltage deviation or disappearance.
In this kind of embodiment, the model of described OR circuit is LTC4352, and the chip of this model possesses the lower characteristic of pressure drop, and the heat produced is less, makes it work reliably in the presence of a harsh environment.
The invention has the beneficial effects as follows the kind and quantity that significantly reduce LCD system components and parts or function element, improve reliability and the serviceable life of LCD drive system in military field, and there is the features such as reliability is high, security is high, integrated level is good, for the reliability of airborne indicator LCD Driving Scheme and redundancy design provide reliable solution.
The present invention is in order to improve the reliability of airborne indicator, security and practicality, and propose a kind of two redundancy LCD drive system, Fig. 1 be couple redundancy LCD drive system connected mode figure.The present invention is achieved in that this system comprises two redundancy DC direct supply and processes the OR circuit of this power supply; This system also comprises 2 and overlaps independently that video data, control signal and power source path are to LCD, and multi-channel data selector selected by video data selector switch; This system also comprises LCD electric supply system, and wherein, 2 cover electric supply systems produce 3.3V, VDD, VGH and VGL respectively, and monitored by intelligent monitoring device with power source, in case there is voltage deviation or disappearance; This system also comprises 2 cover LCD drivings, VCOM+GAMMA produces circuit, and arbitraling logic circuit selects MUX.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (6)
1. a two redundancy LCD drive system, it is characterized in that, this drive system comprises: OR circuit, and described OR circuit receives two-way voltage signal, and when described in any road, voltage signal is normal, then described OR circuit exports two-way enabling signal;
Power-supplying circuit, described power-supplying circuit is configured to be connected to described OR circuit, receives described enabling signal and point two-way output services voltage with a point two-way;
Driving circuit, described driving circuit is configured to be connected to described power-supplying circuit, receives output services voltage described in two-way and export to described LCD by selection with point two-way.
2. according to claim 1 pair of redundancy LCD drive system, it is characterized in that, described power-supplying circuit comprises: two-way voltage conversion system, voltage conversion system described in two-way is connected to described two-way enabling signal, with receive described enabling signal and the voltage of formation logic IC circuit working, gamma principal voltage, for opening the maximum on-state voltage of sweep trace and the minimum standoff voltage for turning off sweep trace.
3. according to claim 1 pair of redundancy LCD drive system, is characterized in that, this drive system also comprises: the first MUX, and described first MUX is configured to be connected between described driving circuit and LCD, to select to export to described LCD.
4. according to claim 1 pair of redundancy LCD drive system, it is characterized in that, this drive system also comprises: the second MUX receives described vision signal and control signal, and be configured to be connected to described driving circuit, so that described vision signal and control signal are selected to export to described driving circuit.
5. according to claim 1 pair of redundancy LCD drive system, it is characterized in that, this drive system also comprises: intelligent monitoring device, described intelligent monitoring device is configured to be connected to described voltage conversion system and driving circuit, with the output signal of the operating voltage and described driving circuit of monitoring the output of described voltage conversion system.
6. according to claim 1 pair of redundancy LCD drive system, is characterized in that, the model of described OR circuit is LTC4352.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510188753.4A CN104835463B (en) | 2015-04-20 | 2015-04-20 | Dual-redundancy LCD driving system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510188753.4A CN104835463B (en) | 2015-04-20 | 2015-04-20 | Dual-redundancy LCD driving system |
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| Publication Number | Publication Date |
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| CN104835463A true CN104835463A (en) | 2015-08-12 |
| CN104835463B CN104835463B (en) | 2017-04-12 |
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| CN201510188753.4A Active CN104835463B (en) | 2015-04-20 | 2015-04-20 | Dual-redundancy LCD driving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217457A (en) * | 2018-09-04 | 2019-01-15 | 江苏清投视讯科技有限公司 | Dual redundant display based on Power Supply Monitoring |
Citations (5)
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|---|---|---|---|---|
| US6803860B1 (en) * | 2002-02-28 | 2004-10-12 | Garmin International, Inc. | Cockpit control systems and methods of controlling data on multiple cockpit instrument panels |
| US20060074559A1 (en) * | 2002-12-17 | 2006-04-06 | Thales | Onboard terrain anticollision display device |
| CN101694575A (en) * | 2009-10-16 | 2010-04-14 | 北京联合大学生物化学工程学院 | LED display circuit shared by double singlechips |
| CN101715544A (en) * | 2007-03-30 | 2010-05-26 | 通用电气航空系统有限公司 | Aircraft displays and display device |
| US20130043009A1 (en) * | 2011-08-16 | 2013-02-21 | General Electric Company | Components with cooling channels and methods of manufacture |
-
2015
- 2015-04-20 CN CN201510188753.4A patent/CN104835463B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6803860B1 (en) * | 2002-02-28 | 2004-10-12 | Garmin International, Inc. | Cockpit control systems and methods of controlling data on multiple cockpit instrument panels |
| US20060074559A1 (en) * | 2002-12-17 | 2006-04-06 | Thales | Onboard terrain anticollision display device |
| CN101715544A (en) * | 2007-03-30 | 2010-05-26 | 通用电气航空系统有限公司 | Aircraft displays and display device |
| CN101694575A (en) * | 2009-10-16 | 2010-04-14 | 北京联合大学生物化学工程学院 | LED display circuit shared by double singlechips |
| US20130043009A1 (en) * | 2011-08-16 | 2013-02-21 | General Electric Company | Components with cooling channels and methods of manufacture |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217457A (en) * | 2018-09-04 | 2019-01-15 | 江苏清投视讯科技有限公司 | Dual redundant display based on Power Supply Monitoring |
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| CN104835463B (en) | 2017-04-12 |
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