CN103065597B - A kind of signal drive circuit - Google Patents
A kind of signal drive circuit Download PDFInfo
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- CN103065597B CN103065597B CN201210589858.7A CN201210589858A CN103065597B CN 103065597 B CN103065597 B CN 103065597B CN 201210589858 A CN201210589858 A CN 201210589858A CN 103065597 B CN103065597 B CN 103065597B
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Abstract
The invention discloses a kind of signal drive circuit and comprise video acquisition module, modular converter, described video acquisition module is connected with AMLCD display module by modular converter, pressure regulation driver module, make the bound of the analog voltage of output controlled, thus the driving voltage met required for different AMLCD, reach the object driving different AMLCD.Thus improve the precision and stability of driving voltage, make the signal drived control of AMLCD reliably more convenient.<!--1-->
Description
Technical field
The present invention relates to a kind of signal drive circuit being applied to airborne helmet-mounted display system.
Background technology
Helmet Mounted Display is that one is fixed on the helmet, for user produces the compact display apparatus of visual image.Because Helmet Mounted Display system has the ability of the detecting devices rapid alignment targets such as director radar, laser, FLIR (Forward-Looking Infrared), become the Advanced Equipment of each arm of the services.At present, the method and the theory that relate to Helmet Mounted Display Design and manufacture have a lot, and Main Developed Countries is also all carrying out similar research work in the world, and its design and fabrication technology is maturation and modernization more and more.
Mostly what the helmet-mounted display system of current development adopted is that monochromatic AMLCD show, and because its size is little, resolution is high, and its peripheral drive circuit has become the difficult point designed.What AMLCD driving circuit domestic at present adopted is all the packaged type chip abroad provided, and which seriously by abroad restriction, purchase difficulty, and its drive voltage range is single fixed value, is only suitable for single AMLCD.
Summary of the invention
The invention provides a kind of signal drive circuit and be converted to positive required for AMLCD and reverse voltage signal rear drive AMLCD to reach digital video signal, this magnitude of voltage can adjust arbitrarily according to the demand of AMLCD, realizes the object driving multiple AMLCD.
In order to solve the problems of the technologies described above, technical scheme of the present invention is that a kind of signal drive circuit comprises video acquisition module, modular converter, and described video acquisition module is connected with AMLCD display module by modular converter, pressure regulation driver module.
Described video acquisition module has two ways of digital signals output port.
Described modular converter adopts DA conversion chip, and the model of conversion chip is AD9763.
Described pressure regulation driver module is by two operation amplifier chip U1 and U2 and resistance R3, R4, R5, R6, R7, R8, R9, R10 forms, described chip U1 and the model of chip U2 are AD828, 1 pin of described chip U1 is connected with AMLCD display module by resistance R9, 2 pin of described chip U1 are connected with modular converter by resistance R5, 1 pin of described chip U1 is also connected by resistance R7 with 2 pin, 3 pin of described chip U1 are connected with reference voltage, 7 pin of described chip U2 are connected with AMLCD display module by resistance R10, 6 pin of described chip U2 are connected with modular converter by resistance R6, 6 pin of described chip U2 are also connected by resistance R8 with 7 pin, 5 pin of described chip U2 are connected with reference voltage.
Described video acquisition module has two ways of digital signals output port and is connected with the digital input port PORT1 of DA conversion chip and digital input port PORT2 respectively, 2 pin of described chip U1 are connected with digital input port PORT1 by resistance R5,6 pin of described chip U2 are connected with digital input port PORT2 by resistance R6, described digital input port PORT1 connects by resistance R3 ground connection, and described digital input port PORT2 is by resistance R4 ground connection.
The reference voltage of the 3 pin accesses of described chip U1 is VIN, the voltage that 1 pin is input to AMLCD display module through resistance R9 is VOUTH, then resistance R3, R5, the pass of R7 is: (VOUTH-VIN)/R7=((IOUT+ ((VOUTH-VIN)/R7)) * R3-VIN)/R5, the reference voltage of the 5 pin accesses of chip U2 is VIN, the voltage that 7 pin are input to AMLCD display module through resistance R10 is VOUTL, resistance R4, R8, the pass of R6 is: (VOUTL-VIN)/R8=((IOUTL+ ((VOUTL-VIN)/R8)) * R4-VIN)/R6.
The present invention compared with prior art, a kind of signal drive circuit comprises video acquisition module, modular converter, described video acquisition module is connected with AMLCD display module by modular converter, pressure regulation driver module, make the bound of the analog voltage of output controlled, thus the driving voltage met required for different AMLCD, reach the object driving different AMLCD.Thus improve the precision and stability of driving voltage, make the signal drived control of AMLCD reliably more convenient.
Accompanying drawing explanation
Fig. 1 is principle of the invention block diagram;
In FIG, 1, video acquisition module, 2, modular converter, 3, pressure regulation driver module 4, AMLCD display module.
Embodiment
As shown in Figure 1, a kind of signal drive circuit comprises video acquisition module 1, modular converter 2, and described video acquisition module 1 is connected with AMLCD display module 4 by modular converter 2, pressure regulation driver module 3.
Described video acquisition module 1 has two ways of digital signals output port.
Described modular converter is adopted 2 and is used DA conversion chip, and the model of conversion chip is AD9763.
Described pressure regulation driver module 3 is made up of two operation amplifier chip U1 and U2 and resistance R3, R4, R5, R6, R7, R8, R9, R10, described chip U1 and the model of chip U2 are AD858,1 pin of described chip U1 is connected with AMLCD display module 4 by resistance R9
2 pin of described chip U1 are connected with modular converter 2 by resistance R5, and 1 pin of described chip U1 is also connected by resistance R7 with 2 pin, and 3 pin of described chip U1 are connected with reference voltage,
7 pin of described chip U2 are connected with AMLCD display module 4 by resistance R10,6 pin of described chip U2 are connected with modular converter 3 by resistance R6,6 pin of described chip U2 are also connected by resistance R8 with 7 pin, and 5 pin of described chip U2 are connected with reference voltage.
Described video acquisition module 1 has two ways of digital signals output port and is connected with the digital input port PORT1 of DA conversion chip and digital input port PORT2 respectively, 2 pin of described chip U1 are connected with digital input port PORT1 by resistance R5,6 pin of described chip U2 are connected with digital input port PORT2 by resistance R6, described digital input port PORT1 connects by resistance R3 ground connection, and described digital input port PORT2 is by resistance R4 ground connection.
The vision signal of input is converted to a certain amount of current signal, and FSADJ, as the reference configuration of change-over circuit, affects the output of IOUT.
1 pin of chip U1 outputs to AMLCD display module by resistance R9, and as the forward voltage of liquid crystal, 7 pin of chip U2 output to AMLCD display module after resistance R10, as the reverse voltage of liquid crystal.3 pin of U1 and 5 pin of U2 connect the reference voltage of input simultaneously.The display of AMLCD relies on the upset of liquid crystal to realize, the upset of liquid crystal needs corresponding voltage driven, by being current signal by digital signal transition, then current signal is passed through U1, U2 carries out amplification constraint, obtains the driving voltage required for AMLCD display module.
After the digital video signal of video acquisition module is input to modular converter, current signal is converted to through modular converter, current signal, after amplifier AD828 amplifies, obtains the positive required for AMLCD display module and reverse voltage, thus reaches the object driving AMLCD display module.
The reference voltage of the 3 pin accesses of chip U1 is VIN, the voltage that 1 pin is input to AMLCD display module through resistance R9 is VOUTH, then resistance R3, the pass of R5, R7 is: (VOUTH-VIN)/R7=((IOUT+ ((VOUTH-VIN)/R7)) * R3-VIN)/R5.
The reference voltage of the 5 pin accesses of chip U2 is VIN, the voltage that 7 pin are input to AMLCD display module through resistance R10 is VOUTL, then resistance R4, the pass of R6, R8 is: (VOUTL-VIN)/R8=((IOUTL+ ((VOUTL-VIN)/R8)) * R4-VIN)/R6.
The bound of the analog voltage of the output adopting above-mentioned resistance proportioning to make is controlled, thus meets the driving voltage required for different AMLCD, reaches the object driving different AMLCD.Thus improve the precision and stability of driving voltage, make the signal drived control of AMLCD reliably more convenient.
Claims (1)
1. a signal drive circuit, comprise video acquisition module (1), modular converter (2) and pressure regulation driver module (3), it is characterized in that: described video acquisition module (1) is by modular converter (2), pressure regulation driver module (3) is connected with AMLCD display module (4), described video acquisition module (1) has two ways of digital signals output port, described modular converter (2) adopts DA conversion chip, the model of conversion chip is AD9763, described pressure regulation driver module (3) is by two operation amplifier chip U1 and U2 and resistance R3, R4, R5, R6, R7, R8, R9, R10 forms, described chip U1 and the model of chip U2 are AD828, 1 pin of described chip U1 is connected with AMLCD display module (4) by resistance R9, 2 pin of described chip U1 are connected with modular converter by resistance R5, 1 pin of described chip U1 is also connected by resistance R7 with 2 pin, 3 pin of described chip U1 are connected with reference voltage, 7 pin of described chip U2 are connected with AMLCD display module by resistance R10, 6 pin of described chip U2 are connected with modular converter (2) by resistance R6, 6 pin of described chip U2 are also connected by resistance R8 with 7 pin, 5 pin of described chip U2 are connected with reference voltage, described video acquisition module (1) has two ways of digital signals output port and is connected with the digital input port PORT1 of DA conversion chip and digital input port PORT2 respectively, 2 pin of described chip U1 are connected with the IOUT1 port of modular converter by resistance R5, 6 pin of described chip U2 are connected with the IOUT2 port of modular converter by resistance R6, the IOUT1 port of described modular converter is by resistance R3 ground connection, the IOUT2 port of described modular converter is by resistance R4 ground connection, the reference voltage of the 3 pin accesses of described chip U1 is VIN, the voltage that 1 pin is input to AMLCD display module (4) through resistance R9 is VOUTH, the output current of conversion chip IOUT1 port is IOUT1, the electric current that the IOUT2 port of conversion chip exports is IOUT2, then resistance R3, R5, the pass of R7 is (VOUTH-VIN)/R7=((IOUT1+ ((VOUTH-VIN)/R7)) * R3-VIN)/R5, the reference voltage of the 5 pin accesses of chip U2 is VIN, the voltage that 7 pin are input to AMLCD display module (4) through resistance R10 is VOUTL, resistance R4, R8, the pass of R6 is: (VOUTL-VIN)/R8=((IOUT2+ ((VOUTL-VIN)/R8)) * R4-VIN)/R6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210589858.7A CN103065597B (en) | 2012-12-30 | 2012-12-30 | A kind of signal drive circuit |
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| CN201210589858.7A CN103065597B (en) | 2012-12-30 | 2012-12-30 | A kind of signal drive circuit |
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| CN103065597A CN103065597A (en) | 2013-04-24 |
| CN103065597B true CN103065597B (en) | 2016-04-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1744193A (en) * | 2005-10-13 | 2006-03-08 | 钰创科技股份有限公司 | Display panel signal amplifying circuit |
| CN101751889A (en) * | 2008-12-17 | 2010-06-23 | 乐金显示有限公司 | Liquid crystal display |
| CN101853626A (en) * | 2007-01-12 | 2010-10-06 | 联詠科技股份有限公司 | Driving device |
| CN101877212A (en) * | 2009-04-30 | 2010-11-03 | 乐金显示有限公司 | Liquid crystal display device and method of driving the same |
| US8054280B2 (en) * | 2007-04-24 | 2011-11-08 | Samsung Electronics Co., Ltd. | Data driver with bias voltage control circuit and display apparatus having the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192378A (en) * | 2006-11-22 | 2008-06-04 | 硕颉科技股份有限公司 | System capable of regulating drive ability of output stage |
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- 2012-12-30 CN CN201210589858.7A patent/CN103065597B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1744193A (en) * | 2005-10-13 | 2006-03-08 | 钰创科技股份有限公司 | Display panel signal amplifying circuit |
| CN101853626A (en) * | 2007-01-12 | 2010-10-06 | 联詠科技股份有限公司 | Driving device |
| US8054280B2 (en) * | 2007-04-24 | 2011-11-08 | Samsung Electronics Co., Ltd. | Data driver with bias voltage control circuit and display apparatus having the same |
| CN101751889A (en) * | 2008-12-17 | 2010-06-23 | 乐金显示有限公司 | Liquid crystal display |
| CN101877212A (en) * | 2009-04-30 | 2010-11-03 | 乐金显示有限公司 | Liquid crystal display device and method of driving the same |
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| CN103065597A (en) | 2013-04-24 |
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