CN107516499A - Based on liquid crystal display drive circuit - Google Patents
Based on liquid crystal display drive circuit Download PDFInfo
- Publication number
- CN107516499A CN107516499A CN201710899832.5A CN201710899832A CN107516499A CN 107516499 A CN107516499 A CN 107516499A CN 201710899832 A CN201710899832 A CN 201710899832A CN 107516499 A CN107516499 A CN 107516499A
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- CN
- China
- Prior art keywords
- circuit
- control
- mouths
- drive circuit
- liquid crystal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
The present invention, which discloses, is based on liquid crystal display drive circuit, and drive circuit includes master chip control circuit, power circuit, control signal amplifying circuit composition, and the master chip control circuit is made up of AT89S52 and 74LS154；P0 and No. P2 control of the AT89S52 single-chip microcomputers shows the output of signal, the low 4 control 74LS154 of No. P1 decoding input, so as to control the output of scanning signal；The power supply of the power circuit is powered for plug wire；The control signal amplifying circuit provides load for AT89S52 single-chip microcomputers, and the NPN triode of 16 conventional 9013 is connect in P0 and P2 mouths and amplifies drive signal；Column direction completes scanning by P0 mouths and P2 mouths in circuit, because P0 mouths do not have pull-up resistor, therefore connects 1k*8 exclusion pull-up, line direction then is completed to scan by 4-16 decoder 74LS154.Also include voltage compensation module, for being compensated in shutdown to the grid on-state voltage of decay pattern of anomaly, the grid on-state voltage value increase.Also include AT89C51, the P1.0 P1.3 control decoders 74LS154 of the AT89C51 completes scanning.
Description
Technical field
The present invention relates to a kind of drive circuit, and in particular to based on liquid crystal display drive circuit.
Background technology
Liquid crystal display includes：Liquid crystal panel assembly, the data driver and raster data model for being connected to liquid crystal panel assembly
Device, it is connected to the SECO that data driver gray voltage generator is used for control gate driver 30 and data driver 20
Device and the DC-DC power supply that power supply is provided for liquid crystal display.Liquid crystal panel assembly includes mutually corresponding lower display surface
Plate and upper display panel and the liquid crystal being folded between display panel and lower display panel.
It is assumed that liquid crystal display has m data lines, horizontal direction there are n bar scan lines in vertical direction, a m*n is combined into
The liquid crystal display of pixel, scan line is intersected with data wire limits multiple pixel cells, and each pixel cell includes three sons
Pixel cell PX.Each sub-pixel unit PX includes a TFT switch device, liquid crystal capacitance and storage capacitance, TFT switch device bag
Include the grid formed together with scan line, the source electrode being connected with data wire and the drain electrode being connected with pixel electrode, storage capacitance
It is connected in parallel to switching device.Originally fill with the Cs electric capacity of electric charge and Clc electric capacity outwards discharge electric charge by data wire,
Because electric charge discharges insufficient within the limited time, make electric discharge and produce the delay of a period of time, so as to be drawn in shutdown
Face has obvious bright line, causes to show bad.
The content of the invention
The technical problems to be solved by the invention are that script fills with the Cs electric capacity of electric charge and Clc electric capacity passes through data wire
Outwards release electric charge, because electric charge discharges insufficient within the limited time, make electric discharge and produce the delay of a period of time, from
And picture has obvious bright line in shutdown, cause to show bad, and it is an object of the present invention to provide being based on liquid crystal display drive circuit,
Solve to fill with the Cs electric capacity of electric charge originally and Clc electric capacity outwards discharges electric charge by data wire, because electric charge is limited
Release is insufficient in time, makes electric discharge and produces the delay of a period of time, so as in shutdown picture have it is obvious bright
Line, cause to show the problem of bad.
The present invention is achieved through the following technical solutions：
Based on liquid crystal display drive circuit, drive circuit includes master chip control circuit, power circuit, control signal amplification
Circuit is formed, and the master chip control circuit is made up of AT89S52 and 74LS154；P0 and No. P2 of the AT89S52 single-chip microcomputers
Control shows the output of signal, the low 4 control 74LS154 of No. P1 decoding input, so as to control the output of scanning signal；Institute
The power supply for stating power circuit is powered for plug wire；The control signal amplifying circuit provides load for AT89S52 single-chip microcomputers, in P0 and
P2 mouths connect the NPN triode amplification drive signal of 16 conventional 9013；Column direction completes scanning by P0 mouths and P2 mouths in circuit, by
There is no pull-up resistor in P0 mouths, therefore connect 1k*8 exclusion pull-up, line direction is then completed by 4-16 decoder 74LS154
Scanning.Originally fill with the Cs electric capacity of electric charge and Clc electric capacity outwards discharges electric charge by data wire, because electric charge is limited
Release is insufficient in time, makes electric discharge and produces the delay of a period of time, so as in shutdown picture have it is obvious bright
Line, causes to show bad, and the present invention includes master chip control circuit, power supply electricity in order to solve problem above, using drive circuit
Road, control signal amplifying circuit composition, avoid electric discharge and produce the delay of a period of time, so as to which in shutdown, picture has
Obvious bright line, cause to show bad.
Also include voltage compensation module, it is described for being compensated in shutdown to the grid on-state voltage of decay pattern of anomaly
Grid on-state voltage value increases.Further, the preferred scheme as the present invention.
Also include AT89C51, the P1.0---P1.3 control decoders 74LS154 of the AT89C51 completes scanning.Enter one
Step, the preferred scheme as the present invention.
Drive circuit includes the triode of 16 9015, further, the preferred scheme as the present invention.
The present invention compared with prior art, has the following advantages and advantages：
1st, the present invention be based on liquid crystal display drive circuit, using drive circuit including master chip control circuit, power circuit,
Control signal amplifying circuit form, avoid electric discharge and produce the delay of a period of time, so as to shutdown when picture have it is bright
Aobvious bright line, cause to show bad；
2nd, the present invention be based on liquid crystal display drive circuit, including voltage compensation module, for shut down when to decay pattern of anomaly
Grid on-state voltage compensate, grid on-state voltage value increase；
3rd, the present invention is based on liquid crystal display drive circuit, and drive circuit includes the triode of 16 9015, and driving condition is more
It is stable.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment, the present invention is made
Further to describe in detail, exemplary embodiment of the invention and its explanation are only used for explaining the present invention, are not intended as to this
The restriction of invention.
Embodiment 1
The present invention is based on liquid crystal display drive circuit, and drive circuit includes master chip control circuit, power circuit, control letter
Number amplifying circuit composition, the master chip control circuit are made up of AT89S52 and 74LS154；The P0 of the AT89S52 single-chip microcomputers
The output of signal, the low 4 control 74LS154 of No. P1 decoding input, so as to control scanning signal are shown with No. P2 control
Output；The power supply of the power circuit is powered for plug wire；The control signal amplifying circuit provides negative for AT89S52 single-chip microcomputers
Carry, the NPN triode of 16 conventional 9013 is connect in P0 and P2 mouths and amplifies drive signal；Column direction is complete by P0 mouths and P2 mouths in circuit
Into scanning, because P0 mouths do not have pull-up resistor, therefore 1k*8 exclusion pull-up is connect, line direction is then by 4-16 decoders
74LS154 completes scanning.During work：Master chip control circuit, power circuit, control signal amplification electricity are included using drive circuit
Road forms, and avoids electric discharge and produces the delay of a period of time, so as to which in shutdown, picture has obvious bright line, causes to show
Show bad.
Embodiment 2
The present invention is based on liquid crystal display drive circuit, and drive circuit includes master chip control circuit, power circuit, control letter
Number amplifying circuit composition, the master chip control circuit are made up of AT89S52 and 74LS154；The P0 of the AT89S52 single-chip microcomputers
The output of signal, the low 4 control 74LS154 of No. P1 decoding input, so as to control scanning signal are shown with No. P2 control
Output；The power supply of the power circuit is powered for plug wire；The control signal amplifying circuit provides negative for AT89S52 single-chip microcomputers
Carry, the NPN triode of 16 conventional 9013 is connect in P0 and P2 mouths and amplifies drive signal；Column direction is complete by P0 mouths and P2 mouths in circuit
Into scanning, because P0 mouths do not have pull-up resistor, therefore 1k*8 exclusion pull-up is connect, line direction is then by 4-16 decoders
74LS154 completes scanning.Also include voltage compensation module, for being mended in shutdown to the grid on-state voltage of decay pattern of anomaly
Repay, the grid on-state voltage value increase.Also include AT89C51, the P1.0---P1.3 control decoders of the AT89C51
74LS154 completes scanning.Drive circuit includes the triode of 16 9015, during work：Including voltage compensation module, for closing
The grid on-state voltage of decay pattern of anomaly is compensated during machine, the grid on-state voltage value increase, included using drive circuit
Master chip control circuit, power circuit, control signal amplifying circuit composition, avoid electric discharge and produce the delay of a period of time,
So as to which in shutdown, picture has obvious bright line, cause to show bad.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (4)
1. it is based on liquid crystal display drive circuit, it is characterised in that：Drive circuit includes master chip control circuit, power circuit, control
Signal amplification circuit composition processed, the master chip control circuit are made up of AT89S52 and 74LS154；The AT89S52 single-chip microcomputers
P0 and No. P2 control show signal output, No. P1 it is low 4 control 74LS154 decoding input, so as to control scanning believe
Number output；
The power supply of the power circuit is powered for plug wire；
The control signal amplifying circuit provides load for AT89S52 single-chip microcomputers, and the NPN of 16 conventional 9013 is met in P0 and P2 mouths
Triode amplifies drive signal；Column direction completes scanning by P0 mouths and P2 mouths in circuit, because P0 mouths do not have pull-up resistor, therefore
1k*8 exclusion pull-up is connect, line direction then is completed to scan by 4-16 decoder 74LS154.
2. according to claim 1 be based on liquid crystal display drive circuit, it is characterised in that：Also include voltage compensation module,
For being compensated in shutdown to the grid on-state voltage of decay pattern of anomaly, the grid on-state voltage value increase.
3. according to claim 1 be based on liquid crystal display drive circuit, it is characterised in that：Also include AT89C51, it is described
AT89C51 P1.0---P1.3 control decoders 74LS154 completes scanning.
4. according to claim 1 be based on liquid crystal display drive circuit, it is characterised in that：Drive circuit includes 16 9015
Triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710899832.5A CN107516499A (en) | 2017-09-28 | 2017-09-28 | Based on liquid crystal display drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710899832.5A CN107516499A (en) | 2017-09-28 | 2017-09-28 | Based on liquid crystal display drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107516499A true CN107516499A (en) | 2017-12-26 |
Family
ID=60726438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710899832.5A Pending CN107516499A (en) | 2017-09-28 | 2017-09-28 | Based on liquid crystal display drive circuit |
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| CN (1) | CN107516499A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5623277A (en) * | 1996-01-29 | 1997-04-22 | Delco Electronics Corporation | Liquid crystal display with image storage ROM |
| CN1262761A (en) * | 1998-02-09 | 2000-08-09 | 精工爱普生株式会社 | Electro-optical device and method for driving same, liquid crystal device and method for driving same, circuit for driving electro-optical device, and electronic device |
| CN1340183A (en) * | 1999-10-18 | 2002-03-13 | 精工爱普生株式会社 | Display |
| CN101162304A (en) * | 2006-10-11 | 2008-04-16 | 爱普生映像元器件有限公司 | Display apparatus |
| CN103280186A (en) * | 2013-06-06 | 2013-09-04 | 天津众联通信工程有限公司 | LED Chinese character display screen |
| CN104167169A (en) * | 2014-06-25 | 2014-11-26 | 程泓竣 | LED advertising board |
| CN104269148A (en) * | 2014-09-30 | 2015-01-07 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal driving circuit, liquid crystal driving method and liquid crystal display device |
-
2017
- 2017-09-28 CN CN201710899832.5A patent/CN107516499A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5623277A (en) * | 1996-01-29 | 1997-04-22 | Delco Electronics Corporation | Liquid crystal display with image storage ROM |
| CN1262761A (en) * | 1998-02-09 | 2000-08-09 | 精工爱普生株式会社 | Electro-optical device and method for driving same, liquid crystal device and method for driving same, circuit for driving electro-optical device, and electronic device |
| CN1340183A (en) * | 1999-10-18 | 2002-03-13 | 精工爱普生株式会社 | Display |
| CN101162304A (en) * | 2006-10-11 | 2008-04-16 | 爱普生映像元器件有限公司 | Display apparatus |
| CN103280186A (en) * | 2013-06-06 | 2013-09-04 | 天津众联通信工程有限公司 | LED Chinese character display screen |
| CN104167169A (en) * | 2014-06-25 | 2014-11-26 | 程泓竣 | LED advertising board |
| CN104269148A (en) * | 2014-09-30 | 2015-01-07 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal driving circuit, liquid crystal driving method and liquid crystal display device |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171226 |