CN203444188U - Debugging system for liquid crystal screen - Google Patents
Debugging system for liquid crystal screen Download PDFInfo
- Publication number
- CN203444188U CN203444188U CN201320229518.3U CN201320229518U CN203444188U CN 203444188 U CN203444188 U CN 203444188U CN 201320229518 U CN201320229518 U CN 201320229518U CN 203444188 U CN203444188 U CN 203444188U
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- liquid crystal
- crystal display
- circuit
- control circuit
- backlight
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Abstract
The utility model discloses a debugging system for a liquid crystal screen. The debugging system for the liquid crystal screen comprises a microcontroller connected with a liquid crystal screen backlight voltage control circuit, a negative voltage control circuit of power supplies of the liquid crystal screen, a positive voltage control circuit of power supplies of the liquid crystal screen, a power sequence control circuit of power supplies, an IO high-low level control circuit, an IO high-low level measuring circuit, a frequency measuring circuit for a digital signal, a voltage measuring circuit of power supplies of the liquid crystal screen, a current measuring circuit of power supplies of the liquid crystal screen, a backlight voltage measuring circuit of the liquid crystal screen, a backlight current measuring circuit of the liquid crystal screen and a terminal. The debugging system for liquid crystal screen can adjust voltages of a power supplies, measure currents of power supplies and clock frequency of the liquid crystal screen, adjust voltage of the backlight, measure backlight current and control the power sequence of power supplies; and the debugging system sends detected data to the terminal, display the data and curves and analyze as well as optimize the data.
Description
Technical field
The utility model relates to a kind of debug system, particularly relates to a kind of liquid crystal display debug system.
Background technology
Color LCD screen was used in a large number on market in recent years, TTL(Transistor-Transistor Logic, being BJT-BJT logic gates) liquid crystal display of interface accounted for wherein greatly, in the interface signal of these liquid crystal displays, there are a lot of signals all can have influence on the display effect of liquid crystal display, cause shake, water ripples, scalelike mark, sudden strain of a muscle screen, low, the backlight rapid wear of contrast, the phenomenon such as dark backlight.Because these signals are many, between individual level signal, also have coupling, these signals of different liquid crystal displays again can be not the same, find suitable parameter, needs a large amount of debugging repeatedly, increased the difficulty of liquid crystal display debugging work.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of, its can adjustable liquid crystal display screen each power supply voltage, measure each power supply electric current, measure liquid crystal display clock frequency, regulate voltage backlight, measure back facet current, control the electrifying timing sequence of each power supply, and the data that record can be dealt into terminal, show data and curve, to data analysis and preferred.
The utility model solves above-mentioned technical matters by following technical proposals: a kind of liquid crystal display debug system, it is characterized in that, and it comprises microcontroller, liquid crystal display voltage control circuit backlight, each power-voltage control circuit of liquid crystal display, each power supply positive voltage control circuit of liquid crystal display, each power supply electrifying sequential control circuit, IO low and high level control circuit, IO low and high level metering circuit, the frequency measurement circuit of digital signal, each supply voltage metering circuit of liquid crystal display, each power-supply current measuring circuit of liquid crystal display, liquid crystal display tension measuring circuit backlight, liquid crystal display back facet current metering circuit, terminating machine, liquid crystal display voltage control circuit backlight, each power-voltage control circuit of liquid crystal display, each power supply positive voltage control circuit of liquid crystal display, each power supply electrifying sequential control circuit, IO low and high level control circuit, IO low and high level metering circuit, the frequency measurement circuit of digital signal, each supply voltage metering circuit of liquid crystal display, each power-supply current measuring circuit of liquid crystal display, liquid crystal display tension measuring circuit backlight, liquid crystal display back facet current metering circuit, terminating machine is all connected with microcontroller.
Preferably, described liquid crystal display voltage control circuit backlight comprises the first isolating device, F/V converter, backlight electric power circuit, and the first isolating device, F/V converter, backlight electric power circuit connect successively.
Preferably, described liquid crystal display back facet current metering circuit comprises interconnective current-to-voltage converting circuit and voltage to frequency converter.
Positive progressive effect of the present utility model is: the utility model, for the debugging of convenient liquid crystal display, is undertaken comprehensively needing to use each function in liquid crystal display debugging, and voltage, electric current, input/output port, the frequency signal of sampling on liquid crystal display.Can also carry out communication with terminal, the signal recording be issued to terminal and show and analyze Optimal Parameters.Utility function is complete, low in energy consumption, and volume is little, can greatly facilitate liquid crystal display debugging work.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of an example of the present utility model.
Fig. 2 is liquid crystal display voltage control circuit schematic diagram backlight in Fig. 1.
Fig. 3 is each power supply electrifying sequential control circuit schematic diagram in Fig. 1.
Fig. 4 is the frequency measurement circuit schematic diagram of digital signal in Fig. 1.
Fig. 5 is liquid crystal display back facet current metering circuit schematic diagram in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, provide the utility model preferred embodiment, to describe the technical solution of the utility model in detail.
As shown in Figure 1, the liquid crystal display debug system that the present embodiment provides comprises microcontroller 1, liquid crystal display voltage control circuit 2(backlight is positive voltage altogether not), each power-voltage control circuit 3 of liquid crystal display, each power supply positive voltage control circuit 4 of liquid crystal display, each power supply electrifying sequential control circuit 5, IO(input and output) low and high level control circuit 6, IO low and high level metering circuit 7, the frequency measurement circuit 8 of digital signal, each supply voltage metering circuit 9 of liquid crystal display, each power-supply current measuring circuit 10 of liquid crystal display, liquid crystal display tension measuring circuit 11(backlight is positive voltage altogether not), liquid crystal display back facet current metering circuit 12(is not total to vagabond current), terminating machine 13, liquid crystal display voltage control circuit 2 backlight, each power-voltage control circuit 3 of liquid crystal display, each power supply positive voltage control circuit 4 of liquid crystal display, each power supply electrifying sequential control circuit 5, IO low and high level control circuit 6, IO low and high level metering circuit 7, the frequency measurement circuit 8 of digital signal, each supply voltage metering circuit 9 of liquid crystal display, each power-supply current measuring circuit 10 of liquid crystal display, liquid crystal display tension measuring circuit 11 backlight, liquid crystal display back facet current metering circuit 12, terminating machine 13 is all connected with microcontroller 1.Wherein liquid crystal display each power-voltage control circuit 3 of voltage control circuit 2 liquid crystal displays backlight, each power supply positive voltage control circuit 4 of liquid crystal display, each power supply electrifying sequential control circuit 5, IO low and high level control circuit 6 are controlled by the IO of microprocessor, the frequency measurement circuit 8 of IO low and high level metering circuit 7, digital signal, each supply voltage metering circuit 9 of liquid crystal display, each power-supply current measuring circuit 10 of liquid crystal display, liquid crystal display tension measuring circuit 11 backlight, liquid crystal display back facet current metering circuit 12 all in microprocessor integrated analog to digital converter sample.
As shown in Figure 2, liquid crystal display voltage control circuit backlight comprises that the first isolating device 15, F/V converter 16, backlight electric power circuit 18, the first isolating devices 15, F/V converter 16, backlight electric power circuit 18 connect successively.The IO output pwm signal 14 of microcontroller 1, pwm signal after the first isolating device 15 is isolated, pwm signal obtains the first voltage signal 17 after F/V converter 16, and F/V converter 16 is connected to the output voltage feedback pin of backlight electric power circuit 18.The IO output pwm signal 14 that regulates microcontroller 1, can change the voltage in the output voltage feedback pin that is connected to backlight electric power circuit 18, thereby regulates the output voltage of backlight electric power circuit.
As shown in Figure 3, microcontroller 1 provides not positive voltage altogether of IO and liquid crystal display voltage control circuit 2(backlight) the pin that enables that enables pin, each power supply positive voltage control circuit 4 of liquid crystal display that enables pin, each power-voltage control circuit 3 of liquid crystal display, and the power switch 19 of these modules is connected, can control the electrifying timing sequence of these modules.
As shown in Figure 4, adopt clock signal 20 frequency divisions of 21 pairs of liquid crystal displays of controllable frequency divider, obtain lower frequency and be input to microcontroller 1 and measure, reduced the requirement to microcontroller 1 clock frequency.Microcontroller 1 can also be controlled the frequency dividing ratio of controllable frequency divider, makes to measure more accurate.
As shown in Figure 5, liquid crystal display back facet current metering circuit comprises interconnective current-to-voltage converting circuit 24 and voltage to frequency converter 26.First current signal 23 is converted to second voltage signal 25 by current-to-voltage converting circuit 24, second voltage signal 25 obtains frequency signal after being connected to voltage to frequency converter 26, is connected to microcontroller 1 and measures after the second isolating device 27.Measure after frequency signal, available mathematical formulae calculates the size of liquid crystal display back facet current.
The utlity model has the positive voltage that can regulate, negative voltage and not altogether positive voltage supply with liquid crystal display; Can control the electrifying timing sequence of each power supply of liquid crystal display; Can provide controlled low and high level IO interface to liquid crystal display; Can measure the voltage, electric current of each power supply of liquid crystal display, altogether ground voltage, altogether vagabond current, the low and high level of input/output port, the frequency of digital signal and cycle; Can and terminal called, the data that record are dealt into terminal and show data and curve, to data analysis and preferably, the information of can also receiving terminal sending, arranges parameters.Liquid crystal display is the liquid crystal display of TTL interface.In positive voltage supply circuit, isolating device and F/V converter have not been adopted altogether; Not altogether positive voltage metering circuit, altogether in vagabond current metering circuit, do not adopted isolating device and Voltage-to-frequency Converter.To voltage, electric current, altogether ground voltage, not altogether in the measurement of vagabond current, all adopted modulus switching device.Positive voltage supply circuit does not have ena-bung function altogether.In the frequency of digital signal and period measurement circuit, adopted controllable frequency divider.First the utility model classifies to control object and measuring object, and homogeneous object can be taked same class methods.Control object is divided into five classes: positive voltage control, negative voltage control, the not positive voltage control on ground altogether, sequential control, IO low and high level are controlled.Measuring object is divided three classes: voltage measurement, current measurement, the not voltage measurement on ground altogether, the not current measurement on ground altogether, IO low and high level are measured, the frequency measurement of digital signal.The data that record are dealt into terminal and show data and curve, and to data analysis and preferably, the information of can also receiving terminal sending, arranges parameters.
The utility model can adjustable liquid crystal display screen each power supply voltage, measure each power supply electric current, measure liquid crystal display clock frequency, regulate voltage backlight, measure back facet current, control the electrifying timing sequence of each power supply, and the data that record can be dealt into terminal, show data and curve, to data analysis and preferred, the information of can also receiving terminal sending, arranges parameters.For the debugging of convenient liquid crystal display, by needing to use each function in liquid crystal display debugging, undertaken comprehensively, and voltage, electric current, input/output port, the frequency signal of sampling on liquid crystal display.Can also carry out communication with terminal, the signal recording be issued to terminal and show and analyze, Optimal Parameters, utility function is complete, low in energy consumption, and volume is little, can greatly facilitate liquid crystal display debugging work.
Those skilled in the art can carry out various remodeling and change to the utility model.Therefore, the utility model has covered various remodeling and the change in the scope that falls into appending claims and equivalent thereof.
Claims (3)
1. a liquid crystal display debug system, is characterized in that, it comprises microcontroller, liquid crystal display voltage control circuit backlight, each power-voltage control circuit of liquid crystal display, each power supply positive voltage control circuit of liquid crystal display, each power supply electrifying sequential control circuit, IO low and high level control circuit, IO low and high level metering circuit, the frequency measurement circuit of digital signal, each supply voltage metering circuit of liquid crystal display, each power-supply current measuring circuit of liquid crystal display, liquid crystal display tension measuring circuit backlight, liquid crystal display back facet current metering circuit, terminating machine, liquid crystal display voltage control circuit backlight, each power-voltage control circuit of liquid crystal display, each power supply positive voltage control circuit of liquid crystal display, each power supply electrifying sequential control circuit, IO low and high level control circuit, IO low and high level metering circuit, the frequency measurement circuit of digital signal, each supply voltage metering circuit of liquid crystal display, each power-supply current measuring circuit of liquid crystal display, liquid crystal display tension measuring circuit backlight, liquid crystal display back facet current metering circuit, terminating machine is all connected with microcontroller.
2. liquid crystal display debug system as claimed in claim 1, it is characterized in that, described liquid crystal display voltage control circuit backlight comprises the first isolating device, F/V converter, backlight electric power circuit, and the first isolating device, F/V converter, backlight electric power circuit connect successively.
3. liquid crystal display debug system as claimed in claim 1, is characterized in that, described liquid crystal display back facet current metering circuit comprises interconnective current-to-voltage converting circuit and voltage to frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320229518.3U CN203444188U (en) | 2013-04-28 | 2013-04-28 | Debugging system for liquid crystal screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320229518.3U CN203444188U (en) | 2013-04-28 | 2013-04-28 | Debugging system for liquid crystal screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203444188U true CN203444188U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320229518.3U Expired - Fee Related CN203444188U (en) | 2013-04-28 | 2013-04-28 | Debugging system for liquid crystal screen |
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| CN (1) | CN203444188U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597461A (en) * | 2017-12-26 | 2018-09-28 | 中航华东光电有限公司 | The method for realizing electrical picture signal control on liquid crystal display based on FPGA |
-
2013
- 2013-04-28 CN CN201320229518.3U patent/CN203444188U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597461A (en) * | 2017-12-26 | 2018-09-28 | 中航华东光电有限公司 | The method for realizing electrical picture signal control on liquid crystal display based on FPGA |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20180428 |