CN109147634A - A kind of generating device and method of display screen detection signal - Google Patents
A kind of generating device and method of display screen detection signal Download PDFInfo
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- CN109147634A CN109147634A CN201811232062.XA CN201811232062A CN109147634A CN 109147634 A CN109147634 A CN 109147634A CN 201811232062 A CN201811232062 A CN 201811232062A CN 109147634 A CN109147634 A CN 109147634A
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- G—PHYSICS
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- 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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The invention discloses the generating devices and method of a kind of display screen detection signal.The generating device of display screen detection signal includes control module, clock signal generation module, data-signal conversion module, data and turns string module and difference block, wherein, control module is for obtaining image data, and the pixel clock signal according to needed for display screen generates clock signal corresponding with pixel clock signal；Clock signal generation module is used to generate the clock signal for controlling driving IC output according to clock signal；Data-signal conversion module is used to image data being converted into TTL data-signal；Data simultaneously turn string module for TTL data-signal to be converted into serial data signal；Difference block is respectively used to that serial data signal is carried out mini-LVDS differential conversion according to clock signal.The present invention realizes the detection to different display screens by realizing that mini-LVDS signal differential pair is matched with display screen in signal conversion process.
Description
Technical field
The present embodiments relate to the generations of the technical field of display screen detection more particularly to a kind of display screen detection signal
Device and method.
Background technique
With the quick emergence of electronic car industry, interior liquid crystal display demand is more and more diversified, either traditional
Middle control platform or present instrument board are shown, 3D parks, car entertainment and automatic Pilot are shown, all more and more to use
Liquid crystal display is shown.This requires the high reliability of liquid crystal display, various shapes, at the same require display be more clear, stablize and
High anti-interference, the demand of the above marketization can all bring challenges to the actuation techniques of liquid crystal display.
Present Mini-LVDS technology is widely used in high-definition liquid crystal screen very much, it is in low-voltage differential signal (Low-
Voltage Differential Signaling, LVDS) the low-voltage differential letter that develops on the basis of technology and advanced optimize
Number.The characteristics of which employs the bilateral signals along transmission of clock, reduces the electromagnetic interference of signal, provides for liquid crystal display very high
Bandwidth, and data channel can be distributed according to the size reasonable of the resolution ratio of liquid crystal display, lower the transmission frequency of data.These are excellent
The integrated level of liquid crystal display that point greatly improves, for liquid crystal display has profiled shape to provide reliable genetic prerequisite.
However, Mini-LVDS technical application is in liquid crystal display generally using dedicated detection signal generation apparatus to liquid crystal
The display effect of screen is detected, and the timing of these dedicated detection signal generation apparatus is fixed.And different resolution
Liquid crystal display is typically necessary special timing realization and detects to the display effect of liquid crystal display, at this time dedicated detection signal hair
Generating apparatus application range is limited.
Summary of the invention
The present invention provides the generating device and method of a kind of display screen detection signal, is carried out with realizing to different display screens
Detection increases the application range of the generating device of display screen detection signal.
In a first aspect, the embodiment of the invention provides a kind of generating device of display screen detection signal, including control module,
Clock signal generation module, data-signal conversion module, data simultaneously turn string module and difference block；
The control module for obtaining image data, and the pixel clock signal according to needed for display screen generate with it is described
The corresponding clock signal of pixel clock signal；
The clock signal generation module is connect with the control module, for being generated according to the clock signal for controlling
The clock signal of system driving IC output；Wherein, the clock signal includes the horizontal timing letter of LD, POL, CKV, SV and LVCLK
Number and vertical clock signal；
The data-signal conversion module is connect with the control module, is used for described image data conversion into TTL number
It is believed that number；
The data simultaneously turn a string module and connects with the data-signal conversion module, are used for the TTL data-signal turn
Change serial data signal into；
The difference block is connect with the clock signal generation module and the data and a turn string module respectively, is used for root
The serial data signal is subjected to mini-LVDS differential conversion according to the clock signal, generates mini-LVDS signal differential
It is right.
It specifically, further include one point of multichannel module；
One point of multichannel module is used to export the mini-LVDS signal differential to multidiameter delay is divided into.
Specifically, the clock signal generation module, data-signal conversion module, data and turn string module and difference block
It is integrated in a fpga chip.
It specifically, further include LAN module and the memory module with the control module carry；
The LAN module is connect with the memory module, for by the image data download in host computer to the storage
Module is stored；
The control module is used to read described image data from the memory module.
It specifically, further include power module and Power Monitoring Unit；
The Power Monitoring Unit is connect with the control module, and the power module and the Power Monitoring Unit connect
It connects, Current Voltage parameter needed for the control module is also used to export the display screen is described to the Power Monitoring Unit
Power Monitoring Unit is used to generate power control signal according to the Current Voltage parameter and export to the power module；It is described
Power module is used for according to the power control signal out-put supply signal；
The Power Monitoring Unit is also used to the power supply signal of the output of power module described in real-time monitoring, in real time will monitoring
The power supply signal be transmitted to the control module；
The control module is also used to that the power supply signal is uploaded to the host computer by the LAN module.
It specifically, further include the first output port, second output terminal mouth and third output port；
First output port is connect with the difference block, for exporting the mini-LVDS signal differential pair；
The second output terminal mouth respectively with the control module, the power module and the clock signal generation module
Connection, for exporting the clock signal, the power supply signal and the clock signal；
The third output port is connect with the data-signal conversion module, for exporting the TTL data-signal.
It specifically, further include image switching module；Described image switching module is connect with the control module, for full
Foot triggers the control module and obtains another image data when imposing a condition.
Second aspect, the embodiment of the invention also provides a kind of method for generation of display screen detection signal, comprising:
Obtain image data；
The pixel clock according to needed for display screen generates clock signal corresponding with the pixel clock；
The clock signal for controlling driving IC output is generated according to the clock signal；Wherein, the clock signal packet
Include the horizontal clock signal and vertical clock signal of LD, POL, CKV, SV and LVCLK；
By described image data conversion at TTL data-signal；
The TTL data-signal is converted into serial data signal；
The serial data signal is subjected to mini-LVDS differential conversion according to the clock signal, generates mini-LVDS
Signal differential pair.
Specifically, described that the serial data signal is carried out by mini-LVDS differential conversion according to the clock signal, it is raw
At mini-LVDS signal differential to later, further includes:
The mini-LVDS signal differential is exported to multidiameter delay is divided into.
Specifically, further includes:
Power control signal is generated according to Current Voltage parameter needed for the display screen；
Power supply signal is generated according to the power control signal.
Technical solution of the present invention, the generating device of display screen detection signal include control module, clock signal generation mould
Block, data-signal conversion module, data simultaneously turn string module and difference block；Control module for obtaining image data, and according to
Pixel clock signal needed for display screen generates clock signal corresponding with pixel clock signal；Clock signal generation module and control
Molding block connection, for generating the clock signal for controlling driving IC output according to clock signal；Data-signal conversion module
It is connect with control module, for image data to be converted into TTL data-signal；Data simultaneously turn string module and data-signal modulus of conversion
Block connection, for TTL data-signal to be converted into serial data signal；Difference block respectively with clock signal generation module and number
According to and turn string a module connection, for according to clock signal by serial data signal carry out mini-LVDS differential conversion, generate
Mini-LVDS signal differential pair.The present embodiment is directed to different types of display screen, by realizing in signal conversion process
Mini-LVDS signal differential pair is matched with display screen, so as to generate the detection signal for detecting different types of display screen, is kept away
The generating device for having exempted from display screen detection signal is only used for detection with the matched display screen of its timing, increases display screen inspection
Survey the application range of the generating device of signal.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the generating device that a kind of display screen provided in an embodiment of the present invention detects signal；
Fig. 2 is a kind of timing diagram of clock signal and image data provided in an embodiment of the present invention；
Fig. 3 is the timing diagram of another clock signal and image data provided in an embodiment of the present invention；
Fig. 4 is a kind of timing diagram of mini-LVDS Difference signal pair provided in an embodiment of the present invention；
Fig. 5 is the timing diagram of another kind mini-LVDS Difference signal pair provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram for the generating device that another display screen provided in an embodiment of the present invention detects signal；
Fig. 7 is the structural schematic diagram for the generating device that another display screen provided in an embodiment of the present invention detects signal；
Fig. 8 is the structural schematic diagram for the generating device that another display screen provided in an embodiment of the present invention detects signal；
Fig. 9 is the structural schematic diagram for the generating device that another display screen provided in an embodiment of the present invention detects signal；
Figure 10 is the structural schematic diagram for the generating device that another display screen provided in an embodiment of the present invention detects signal；
Figure 11 is the flow chart that a kind of image data provided in an embodiment of the present invention automatically switches；
Figure 12 is the flow chart for the method for generation that a kind of display screen provided in an embodiment of the present invention detects signal.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is the structural schematic diagram for the generating device that a kind of display screen provided in an embodiment of the present invention detects signal, such as Fig. 1
Shown, the generating device of display screen detection signal includes control module 110, clock signal generation module 120, data-signal turn
It changes the mold block 130, data and turns string module 140 and difference block 150.Control module 110 is used to obtain image data, and according to aobvious
Pixel clock signal needed for display screen generates clock signal corresponding with pixel clock signal；Clock signal generation module 120 with
Control module 110 connects, for generating the clock signal for controlling driving IC output according to clock signal, wherein timing letter
Number include LD, POL, CKV, SV and LVCLK horizontal clock signal and vertical clock signal；Data-signal conversion module 130 with
Control module 110 connects, for image data to be converted into TTL data-signal；Data simultaneously turn string module 140 and data-signal turn
It changes the mold block 130 to connect, for TTL data-signal to be converted into serial data signal；Difference block 150 is produced with clock signal respectively
Raw module 120 and data simultaneously turn the string connection of module 140, for serial data signal to be carried out mini-LVDS according to clock signal
Differential conversion generates mini-LVDS signal differential pair.
Specifically, control module 110 can be micro-control unit (Micro Control Unit, MCU), control module
110 have store function, and can run test program, other modules of the generating device of signal can be detected for display screen
Image data and control signal are provided, to realize the generating device detection display screen of display screen detection signal.Control module 110
Available image data, two ways can be divided by obtaining image data, and image is stored in advance for control module 110 in the first
Data directly read pre-stored image data in the detection process；Another kind is that control module 110 is connect with host computer,
In the detection process, control module 110 obtains image data from host computer.
Moreover, control module 110 can generate clock corresponding with pixel clock according to the pixel clock needed for display screen
Signal.The size of different display screens is different, and the pixel arrangement needed is also different, such as the pixel that large-sized display screen needs
Line number and columns it is bigger.Alternatively, the display screen of identical size, because of Pixel Dimensions difference, the line number and columns of pixel
It is not identical.When the pixel arrangement difference of different display screens, drive the frequency of the clock signal of pixel light emission also not identical, because
This, control module 110 needs the pixel clock signal according to needed for display screen to generate clock letter corresponding with pixel clock signal
Number, the signal for enabling the generating device of display screen detection signal to generate is matched with display screen.Under normal circumstances, the clock of generation
The frequency of the signal clock signal that can refer to generation corresponding with pixel clock signal is equal with the frequency of pixel clock signal, from
And make the clock signal generated for the system clock of subsequent module work and the clock for generating differential clock signal.
After control module 110 generates clock signal, clock signal generation module 120 is generated according to clock signal for controlling
The clock signal of system driving IC output.Wherein, driving IC is the driving chip of display screen, and predominantly display screen provides control signal
And data-signal, illustratively, display screen includes data write-in and light emitting phase when showing.In data write phase, IC is driven
The scanning signal of output, which is used to control the row write of display screen, to be entered to show data, and data-signal is used to show in certain a line of display screen
When display data are provided, luminous signal is used to for display screen provide luminous enable signal, and display screen is made to enter light emitting phase.Driving
IC provide signal timing with the frequency dependence of pixel clock signal.And the pixel arrangement of different display screens is different, as
The frequency of plain clock signal is different, therefore in order to which the timing for the signal for driving IC to export is matched with display screen, needs to driving IC
The timing of the signal of output is adjusted.Clock signal generation module 120 is generated according to the clock signal that control module 110 exports
It can realize that the level of clock signal jumps by way of counting when for controlling the clock signal of driving IC output.Timing letter
Number include LD, POL, CKV, SV and LVCLK horizontal clock signal and vertical clock signal, wherein CKV signal be clock
Signal, LVCLK signal are differential clock signal.The signal of the timing control driving IC output of these clock signals.Clock signal
The clock signal that generation module 120 exports is matched with display screen, generally comprises the configuration parameter of mini-LVDS signal, such as count
According to pair selection, can choose 3/6/12 pair, mini-LVDS signal includes clock signal and mini-LVDS data-signal, and
The two matching, the serial TTL signal that mini-LVDS data-signal is exported by data and turn string module 140 is through differential conversion shape
At；Or the selection of the operating mode of mini-LVDS mould group, it can choose Normal/Dual-Gate/DIP Mode etc..Example
Property, Fig. 2 is a kind of timing diagram of clock signal and image data provided in an embodiment of the present invention, as shown in Fig. 2, working as display screen
Row pixel number be 1820 when, can be set image data be high level when be counted as 0, at this time LD, POL be high level,
CKV is low level, and when counting down to 56, LD jump is low level, and when counting down to 621, CKV jump is high level, when counting down to
When 1410, the overturning of POL clock signal, when counting down to 1416, image data is low level at this time, completes one group of image data
Transmission, the one-row pixels of display screen are shown that CKV jump at this time is low level, are done for the display of display screen next line pixel
Prepare.When continuing to count, then start the display process of display screen next line pixel, i.e., the transmission of next group image data.
Moreover, because signal data is serial data, therefore the set of frequency of the horizontal clock signal LVCLKP of LVCLK compares
Height makes image data complete data write-in within cycle time.
Fig. 3 is the timing diagram of another clock signal and image data provided in an embodiment of the present invention, as shown in figure 3,
On the basis of Fig. 2, the timing diagram for the pixel write-in image data that display screen is not gone together is embodied.Illustratively, the column of display screen
When the number of pixel is 1126, in every a line input image data, the timing and Fig. 2 of LD signal, POL signal and CKV signal
In timing it is identical.On this basis, Fig. 3 is extended to the timing of clock signal when not going together pixel display, moreover, in display screen
When pixel of not going together is shown, SV signal is low level, until a frame of display screen, which is shown, to be terminated.
It follows that clock signal generation module 120 can be generated according to clock signal for controlling driving IC output
Clock signal, and the signal of clock signal control driving IC output can be matched with display screen.
In addition, the data format for the image data that control module 110 obtains is picture format, for example, being bmp or JPGF lattice
Formula etc., specially rgb image data signal.In order to which rgb image data signal is converted to mini-LVDS signal differential pair, first
Rgb image data signal is converted into TTL data-signal.At this point, data-signal conversion module 130 is connect with control module 110,
Data-signal conversion module 130 receives rgb image data signal, and is converted into TTL data-signal, and passes through data and turn
The parallel data signal of TTL is converted into serial data signal by string module 140.TTL data and turn string during, using 4
The clock signal of overtones band converts parallel data into serial data.
Difference block 150 is connect with clock signal generation module 120 and data and a turn string module 140 respectively.Difference block
150 receive the clock signal that clock signal generation module 120 exports, and generate the corresponding mini-LVDS number under clock signal
It is believed that number, i.e. mini-LVDS Difference signal pair.At this point, mini-LVDS data-signal is by data and turns what string module 140 exported
Serial TTL signal is formed through differential conversion.Illustratively, when TTL signal be three groups of double-channel signal R1[0-7], G1[0-
7], B1[0-7], R2[0-7], G2[0-7] and B2[0-7], which forms six groups of data arrangements, and is output to
Difference block 150 is converted.Each group of data are transmitted in the form of byte, that is, include 8bit.
It should be noted that clock signal and serial TTL data-signal be clock signal same clock domain with
Parallel byte data form synchronizes generation, and it is synchronous with the stabilization of TTL signal output timing that it is hereby ensured that clock signals, most
End form at mini-LVDS data-signal matched with display screen, for detecting display screen.
Illustratively, Fig. 4 is a kind of timing diagram of min-LVDS Difference signal pair provided in an embodiment of the present invention, such as Fig. 4
Shown, each group of data of TTL signal respectively correspond one group of mini-LVDS signal differential pair.For example, LVR_0P/N corresponds to TTL
The R1[0-7 of signal], LVR_1P/N corresponds to the R2[0-7 of TTL signal], LVG_0P/N corresponds to the G1[0-7 of TTL signal], LVG_
1P/N corresponds to the G2[0-7 of TTL signal], LVB_0P/N corresponds to the B1[0-7 of TTL signal], LVB_1P/N corresponds to the B2 of TTL signal
[0-7].And differential clock signal LVCLK also needs to be converted into mini-LVDS signal differential pair, for being data mini-
LVDS signal differential is to offer differential clock signal.Therefore mini-LVDS data-signal includes 7 pairs of mini-LVDS signal differentials
Right, mini-LVDS signal differential provides detection to display screen is transmitted to by way of communication, so as to be embodied as display screen
Signal.Mini-LVDS signal differential in conversion process with display screen real-time matching, so as to as detection different type
Display screen detection signal, avoid display screen detection signal generating device be only used for and the matched display screen of its timing
Detection, increase display screen detection signal generating device application range.In addition, mini-LVDS signal differential is to can be with
Anti-interference ability in signals transmission is greatly improved, therefore can be adapted for the display of the signal with upper frequency and clock
In screen.
It should be noted that the arrangement mode for changing mini-LVDS data can change the display direction of display screen.Specifically
The signal averaging of R, G and B are divided into two groups by ground, wherein one group is exported by LVR_0P/N, LVG_0P/N and LVB_0P/N, in addition
One group is exported by LVR_1P/N, LVG_1P/N and LVB_1P/N.Illustratively, the signal of R, G and B are divided into odd number group and even number
Group, every group of data are a byte.As shown in figure 4, when the odd number group of LVR_0P/N output R data signal, such as R1[0-7],
R3[0-7], LVG_0P/N export G data signal odd number group, such as G1[0-7], G3[0-7], LVB_0P/N export B data letter
Number odd number group, such as B1[0-7], B3[0-7] when, the even number set of corresponding LVR_1P/N output R data signal, such as R2
[0-7], R4[0-7], LVG_1P/N export G data signal even number set when, such as G2[0-7], G4[0-7], LVB_1P/N is defeated
The odd number group of B data signal out, such as B2[0-7], B4[0-7].Display screen corresponds to a kind of display direction at this time.Fig. 5 is this hair
The timing diagram for another min-LVDS Difference signal pair that bright embodiment provides, as shown in figure 5, when LVR_1P/N exports R data
The odd number group of signal, such as R1[0-7], R3[0-7], LVG_1P/N export G data signal odd number group, such as G1[0-7], G3
[0-7], LVB_1P/N export the odd number group of B data signal, such as B1[0-7], B3[0-7] when, corresponding LVR_0P/N exports R
The even number set of data-signal, such as R2[0-7], R4[0-7], when LVG_0P/N exports the even number set of G data signal, such as G2
[0-7], G4[0-7], LVB_0P/N export B data signal odd number group, such as B2[0-7], B4[0-7].Display screen pair at this time
Answer another display direction.
Moreover, between the frequency of the data-signal of the frequency and pixel of clock signal, there are certain multiple proportion, multiples
Relationship can come out according to pixel color depth and data path computation.Illustratively, when pixel color depth be 24, have 6 pairs
When data-signal (i.e. bilateral to sample 8 data along sampled data, each clock cycle T), the frequency of clock signal is pixel
2 times of frequency, as shown in Figure 4.
The technical solution of the present embodiment, the generating device of display screen detection signal include control module, clock signal generation
Module, data-signal conversion module, data simultaneously turn string module and difference block.Control module is for obtaining image data, and root
Clock signal corresponding with pixel clock signal is generated according to pixel clock signal needed for display screen.Clock signal generation module with
Control module connection, for generating the clock signal for controlling driving IC output according to clock signal；Wherein, clock signal packet
Include the horizontal clock signal and vertical clock signal of LD, POL, CKV, SV and LVCLK.Data-signal conversion module and control module
Connection, for image data to be converted into TTL data-signal.Data and turn string a module connect with data-signal conversion module, use
In TTL data-signal is converted into serial data signal.Difference block respectively with clock signal generation module and data and turn string
Module connection generates mini-LVDS letter for serial data signal to be carried out mini-LVDS differential conversion according to clock signal
Number differential pair.The present embodiment by realizing that mini-LVDS signal differential pair is matched with display screen in signal conversion process, thus
It can be used as the detection signal for detecting different types of display screen, the generating device for avoiding display screen detection signal is only used for
With the detection of the matched display screen of its timing, the application range of the generating device of display screen detection signal is increased.
Based on the above technical solution, Fig. 6 is that another display screen provided in an embodiment of the present invention detects signal
The structural schematic diagram of generating device, as shown in fig. 6, the generating device of display screen detection signal further includes one point of multichannel module 160.
One point of multichannel module 160 is at least exporting mini-LVDS signal differential to multidiameter delay is divided into.
Specifically, one point of multichannel module 160 can be integrated IC, including multiple parallel output ports, can simultaneously by
The mini-LVDS signal differential that difference block 150 exports is exported to from multiple parallel output ports.Each parallel output port can
It is separately connected the display screen of same type, the mini-LVDS signal differential that difference block 150 exports at this time to can match simultaneously
Multiple display screens, therefore the display screen of multiple same types can be detected simultaneously, hardware cost is not only saved, life is improved
Efficiency is produced, while the interference of the transmission line signals under high temperature ageing environment, problem of signal attenuation can also be substantially reduced.
On the basis of above-mentioned each technical solution, Fig. 7 is that another display screen provided in an embodiment of the present invention detects signal
Generating device structural schematic diagram, as shown in fig. 7, display screen detection signal generating device further include LAN module 180 and with
The memory module 190 of 110 carry of control module.LAN module 180 is connect with memory module 190, for by the image in host computer
Data are downloaded to memory module 190 and are stored.Control module 110 is for reading image data from memory module 190.
Specifically, in the mode of two kinds of acquisition image datas of control module 110, pre-stored image data is being obtained
When, LAN module 180 can be stored from downloading data in host computer to memory module 190, wherein LAN module 180 can be
Burning/recording chip.After storing image data in memory module 190, control module 110 therefrom obtains the image data of needs and leads to
Bus transfer is crossed to data-signal conversion module 130.Memory module 190 can be FLASH memory.It is obtained in control module 110
During taking image data, buffer storage can be set in control module 110, to improve the reading of control module 110
The speed of image data.Illustratively, 2 DDR3 can be set.
Based on the above technical solution, Fig. 8 is that another display screen provided in an embodiment of the present invention detects signal
The structural schematic diagram of generating device, as shown in figure 8, the generating device of display screen detection signal further includes power module 200 and electricity
Source monitoring module 210.Power Monitoring Unit 210 is connect with control module 110, and power module 200 and Power Monitoring Unit 210 connect
It connects, Current Voltage parameter needed for control module 110 is also used to output display screen to Power Monitoring Unit 210, Power Supply Monitoring mould
Block 210 is used to generate current controling signal and voltage control signal according to Current Voltage parameter and export to power module 200；Electricity
Source module 200 is used for according to current controling signal and voltage control signal output current signal and voltage signal.Power Supply Monitoring mould
Block 210 is also used to the current signal and voltage signal of the output of real-time monitoring power module 200, in real time by the current signal of monitoring
Control module 110 is transmitted to voltage signal.Control module 110 is also used to believe current signal and voltage by LAN module 180
Number it is uploaded to host computer.
Specifically, the power supply that different modules needs may be different, therefore power module 200 needs to export multiple power sources letter
Number, illustratively, power module 200 may include the generation circuit of the power supply signals such as VDD, AVDD, VGH, VGL, VBL, respectively
Export different power supply signals.In order to which power module 200 can correctly export the power supply signal that modules need to phase
The module answered, Current Voltage parameter needed for control module 110 obtains display screen first, and export to Power Monitoring Unit 210,
Power Monitoring Unit 210 generates power supply signal according to Current Voltage parameter and exports to power module 200.Illustratively, power supply
Monitoring module 210 can be another MCU, and control 200 out-put supply of power module letter can be formed according to Current Voltage parameter
Number power control signal, may include current controling signal and voltage control signal, and control power module 200 and export difference
Power supply signal to different modules.Power Monitoring Unit 210 can be with the generation electricity of different electrical power signal in power module 200
Road is separately connected, for controlling the generation circuit of different electrical power signal respectively.
In addition, Power Monitoring Unit 210 is also used to the power supply signal of the output of real-time monitoring power module 200.Illustratively,
It may include constant current unit and/or constant pressure unit in power module 200, the generating device of signal can be not only detected for display screen
Other modules stable power supply signal is provided, while can be used for monitoring power module 200 output Current Voltage, and in real time
By the electric current of monitoring and voltage transmission to control module 110, control module 110 will be on electric current and voltage by LAN module 180 on ground
Host computer is reached, the power supply signal that analysis power module 200 exports can be monitored in real time by host computer, when power module 200
When the power supply signal of output occurs abnormal, host computer is alarmed, and controls power supply by LAN module 180 and control module 110
Module 200 closes the output of power supply signal, so that equipment be effectively protected, prevents display screen from damaging because of abnormal electrical power supply.
In addition, can also include filter processing unit in power module 200, for being filtered, connecing to the alternating current of access
Ground, pressure stabilizing, anti-interference process.
Based on the above technical solution, Fig. 9 is that another display screen provided in an embodiment of the present invention detects signal
The structural schematic diagram of generating device, as shown in figure 9, display screen detection signal generating device further include the first output port 10,
Second output terminal mouth 20 and third output port 30.First output port 10 is connect with difference block 150, for exporting mini-
LVDS signal differential pair.Second output terminal mouth 20 respectively with control module 110, power module 200 and clock signal generation module
120 connections, for exporting clock signal, power supply signal and clock signal.Third output port 30 and data-signal conversion module
130 connections, for exporting TTL data-signal.
Specifically, the first output port 10 exports mini-LVDS signal differential pair, and second output terminal mouth 20 exports clock letter
Number, power supply signal and clock signal, third output port 30 exports TTL data-signal.Second output terminal mouth 20 and third export
Port 30, which is combined, can drive the binary channels display screen of TTL data-interface, wherein second output terminal mouth 20 provide power supply signal with
And the PORT COMs such as control SPI and I2C, third output port 30 provide TTL data-signal.And the first output port 10 and second
Output port 20 combines the display screen that can drive mini-LVDS data-interface, wherein the first output port 10 provides mini-
LVDS signal differential pair, second output terminal mouth 20 provide the PORT COMs such as power supply signal and control SPI and I2C.Pass through setting
First output port 10, second output terminal mouth 20 and third output port 30, the device that display screen detection signal can be made to occur
Different types of display screen is driven, the use scope of the generating device of display screen detection signal is increased.
On the basis of above-mentioned each technical solution, Figure 10 is that another display screen provided in an embodiment of the present invention detects signal
Generating device structural schematic diagram, as shown in Figure 10, display screen detect signal generating device further include image switching module
220.Image switching module 220 is connect with control module 110, for the acquisition of trigger control module 110 when meeting setting condition
Another image data.
Specifically, after control module 110 obtains image data, display screen is transmitted in current image date and is shown
Afterwards, it needs to switch image data so that the image modification that display screen is shown, further detects display screen.Image switching module
220 can be realized the switching that control module 110 obtains image data.Under normal circumstances, image switching module 220 can be divided into certainly
Dynamic switching and manual switching both of which.When image switching module 220 is in manual switching mode, image switches each time
Need to provide switching signal manually, control module 110 obtains next image data according to switching signal, correspondingly, above-mentioned setting
Condition is to receive switching signal.Illustratively, a next or upper button can be set on host computer, it is next by pressing
An a or upper button generates switching signal.A next and upper button can also be arranged in host computer simultaneously, at a time
It presses next but one or a upper button generates switching signal.When image switching module 220 is in automatic switchover mode, Ke Yitong
The software realization in circulation key and host computer is crossed, at this point, imposing a condition to be the time interval of image switching.It is exemplary
Ground, Figure 11 are the flow chart that a kind of image data provided in an embodiment of the present invention automatically switches, as shown in figure 11, autocycle diagram
It is shown as 4 kinds of positioning cycles may be implemented in data.At 85 DEG C of high temperature, can timing 110 minutes realization first circulation processes,
In first circulation, control module obtains image data automatically, switches the image of display, such as available 4 groups of image datas, and 4
Width picture is recycled.After first circulation timing, software automatically switches to subsequent cycle, during second circulation,
Can be timing 50 minutes, within the second circulation time, the available more image datas of control module, to realize shorter
Time in automatically switch more pictures, further detect display screen.For example, control module can obtain 6 groups of images automatically
Data, 6 width pictures are recycled.After second circulation timing, software automatically switches to third circulation, is circulated throughout in third
Cheng Zhong, can be timing 40 minutes, keep black picture in third circulation time.After third circulation timing, software is cut automatically
The 4th circulation is changed to, control module obtains two groups of image datas in the 4th circulation, therefore has 2 width pictures and ceaselessly recycle and cut
It changes.In cyclic process, picture detection is carried out, when picture detection is normal, can further carry out voltage detecting, monitoring is aobvious
Whether display screen works normally.When needing to exit cyclic process, circulation can be exited by key or upper computer software.
Optionally, the clock signal generation module in above-mentioned technical proposal, data-signal conversion module, data and turn string mould
Block and difference block can be integrated in a fpga chip.It is communicated to connect between modules on fpga chip at this point it is possible to reduce
Route, while reduce display screen detection signal generating device volume.
The embodiment of the present invention also provides a kind of method for generation of display screen detection signal.This method is used to detect display screen,
The generating device that signal can be detected by display screen executes.Figure 12 is that a kind of display screen provided in an embodiment of the present invention detects signal
Method for generation flow chart, as shown in figure 12, this method comprises:
S101, image data is obtained.
S102, the pixel clock according to needed for display screen generate clock signal corresponding with pixel clock.
S103, the clock signal for controlling driving IC output is generated according to clock signal；Wherein, clock signal includes
The horizontal clock signal and vertical clock signal of LD, POL, CKV, SV and LVCLK.
S104, image data is converted into TTL data-signal.
S105, TTL data-signal is converted into serial data signal.
S106, serial data signal is carried out by mini-LVDS differential conversion according to clock signal, generates mini-LVDS letter
Number differential pair.
The technical solution of the present embodiment, the method for generation that display screen detects signal includes obtaining image data；According to display
Pixel clock needed for screen generates clock signal corresponding with pixel clock；It is generated according to clock signal defeated for controlling driving IC
Clock signal out；Wherein, clock signal includes the horizontal clock signal and vertical timing letter of LD, POL, CKV, SV and LVCLK
Number；Image data is converted into TTL data-signal；TTL data-signal is converted into serial data signal；It will according to clock signal
Serial data signal carries out mini-LVDS differential conversion, generates mini-LVDS signal differential pair.By in signal conversion process
Middle realization mini-LVDS signal differential pair and display screen real-time matching, so as to as the different types of display screen of detection
Signal is detected, the generating device for avoiding display screen detection signal is only used for detection with the matched display screen of its timing, increases
The application range of the generating device of display screen detection signal is added.
Based on the above technical solution, serial data signal mini-LVDS difference is carried out according to clock signal to turn
It changes, generates mini-LVDS signal differential to later, further includes: export mini-LVDS signal differential to multidiameter delay is divided into.
The display screen of multiple same types can be detected simultaneously, not only save hardware cost, improve production efficiency, while can also
Enough substantially reduce under high temperature ageing environment transmission line signals interference, problem of signal attenuation.
Based on the above technical solution, the method that display screen detection signal occurs further include:
Power control signal is generated according to Current Voltage parameter；
Power supply signal is generated according to power control signal.
The method for generation of display screen detection signal provided in this embodiment can be by display screen provided in an embodiment of the present invention
The generating device for detecting signal executes, function and beneficial effect having the same.It, can not in the content of the detailed description of the present embodiment
With reference to the embodiment of the generating device of above-mentioned display screen detection signal, details are not described herein again.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of generating device of display screen detection signal, which is characterized in that including control module, clock signal generation module,
Data-signal conversion module, data simultaneously turn string module and difference block；
The control module is for obtaining image data, and the pixel clock signal according to needed for display screen generates and the pixel
The corresponding clock signal of clock signal；
The clock signal generation module is connect with the control module, is driven for being generated according to the clock signal for controlling
The clock signal of dynamic IC output；Wherein, the clock signal include LD, POL, CKV, SV and LVCLK horizontal clock signal and
Vertical clock signal；
The data-signal conversion module is connect with the control module, for believing described image data conversion at TTL data
Number；
The data and turn string a module connect with the data-signal conversion module, for the TTL data-signal to be converted into
Serial data signal；
The difference block is connect with the clock signal generation module and the data and a turn string module respectively, for according to institute
It states clock signal and the serial data signal is subjected to mini-LVDS differential conversion, generate mini-LVDS signal differential pair.
2. the generating device of display screen detection signal according to claim 1, which is characterized in that further include one point of multichannel mould
Block；
One point of multichannel module is used to export the mini-LVDS signal differential to multidiameter delay is divided into.
3. the generating device of display screen detection signal according to claim 1, which is characterized in that the clock signal generates
Module, data-signal conversion module, data and turn string module and difference block are integrated in a fpga chip.
4. the generating device of display screen according to claim 1 detection signal, which is characterized in that further include LAN module and
With the memory module of the control module carry；
The LAN module is connect with the memory module, for by the image data download in host computer to the memory module
It is stored；
The control module is used to read described image data from the memory module.
5. the generating device of display screen according to claim 4 detection signal, which is characterized in that further include power module and
Power Monitoring Unit；
The Power Monitoring Unit is connect with the control module, and the power module is connect with the Power Monitoring Unit, institute
Current Voltage parameter needed for control module is also used to export the display screen is stated to the Power Monitoring Unit, the power supply prison
Module is controlled to be used to generate power control signal according to the Current Voltage parameter and export to the power module；The power supply mould
Block is used for according to the power control signal out-put supply signal；
The Power Monitoring Unit is also used to the power supply signal of the output of power module described in real-time monitoring, in real time by the institute of monitoring
It states power supply signal and is transmitted to the control module；
The control module is also used to that the power supply signal is uploaded to the host computer by the LAN module.
6. the generating device of display screen detection signal according to claim 5, which is characterized in that further include the first output end
Mouth, second output terminal mouth and third output port；
First output port is connect with the difference block, for exporting the mini-LVDS signal differential pair；
The second output terminal mouth connects with the control module, the power module and the clock signal generation module respectively
It connects, for exporting the clock signal, the power supply signal and the clock signal；
The third output port is connect with the data-signal conversion module, for exporting the TTL data-signal.
7. the generating device of display screen detection signal according to claim 1, which is characterized in that further include image switching mould
Block；Described image switching module is connect with the control module, is obtained for triggering the control module when meeting and imposing a condition
Take another image data.
8. a kind of method for generation of display screen detection signal characterized by comprising
Obtain image data；
The pixel clock according to needed for display screen generates clock signal corresponding with the pixel clock；
The clock signal for controlling driving IC output is generated according to the clock signal；Wherein, the clock signal include LD,
The horizontal clock signal and vertical clock signal of POL, CKV, SV and LVCLK；
By described image data conversion at TTL data-signal；
The TTL data-signal is converted into serial data signal；
The serial data signal is subjected to mini-LVDS differential conversion according to the clock signal, generates mini-LVDS signal
Differential pair.
9. the method for generation of display screen detection signal according to claim 8, which is characterized in that described according to the timing
The serial data signal is carried out mini-LVDS differential conversion by signal, is generated mini-LVDS signal differential to later, is also wrapped
It includes:
The mini-LVDS signal differential is exported to multidiameter delay is divided into.
10. the method for generation of display screen detection signal according to claim 8, which is characterized in that further include:
Power control signal is generated according to Current Voltage parameter needed for the display screen；
Power supply signal is generated according to the power control signal.
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| CN114554121A (en) * | 2020-11-26 | 2022-05-27 | 海信视像科技股份有限公司 | Display device and control method of display device |
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