CN105702187B - A kind of interface circuit, test device - Google Patents
A kind of interface circuit, test device Download PDFInfo
- Publication number
- CN105702187B CN105702187B CN201610027733.3A CN201610027733A CN105702187B CN 105702187 B CN105702187 B CN 105702187B CN 201610027733 A CN201610027733 A CN 201610027733A CN 105702187 B CN105702187 B CN 105702187B
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- signal
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- interface
- power supply
- control unit
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- 238000012360 testing method Methods 0.000 title claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000012546 transfer Methods 0.000 claims description 15
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- 230000005611 electricity Effects 0.000 claims description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention relates to a kind of interface circuits, comprising: signal input unit, control unit, signal output unit；Described control unit is separately connected the signal input unit and signal output unit；Described control unit unit is for receiving the driving signal from the signal input unit, and the corresponding signal conversion circuit of corresponding control Program Generating is defined according to preset display panel interface, described control unit controls the signal conversion circuit and the driving signal is generated corresponding display signal, and is transmitted to the display signal output port of the signal output unit.By using a kind of interface circuit provided by the present invention, test device, a certain range of display panel can be compatible with, it only needs to control program by changing, so that it may change the position of output interface output signal, to realize the connection with the display panel of different model.The present invention, as control unit, further reduced overall cost using lower-cost FPGA.
Description
Technical field
The present invention relates to display device manufacturing technology field, in particular to a kind of interface circuit, display panel.
Background technique
In display panel manufacturing, need to carry out the panel of production to light test, present test method is to pass through
One driving equipment generates signal required for display panel.Driving equipment input interface provides required electricity to light screen
Source, data-signal, and finally transferred signals on panel interface by a series of translation interface.Existing conversion plan is defeated
Enter, output interface and the PCB layout for connecting two interfaces form.Since the equipment interface between different company is in the presence of poor
Different, existing input interface is that the interface of 19 needles needs to be designed and produced according to panel interface accordingly for different display panels
Output interface.
Due to the size of panel and the chip that uses, a kind of panel corresponds to a kind of interface.Therefore every to release a kind of face
Plate just needs to make a corresponding conversion circuit plate.The fabrication cycle of circuit board is long, and needs to redesign cloth
Line remakes circuit board and also generates higher expense.
Summary of the invention
The technical problem to be solved by the present invention is to how make the compatible various display surfaces of foot of same testing device of display panel
The Interface design of plate.
For this purpose, the invention proposes a kind of interface circuits, comprising: signal input unit, control unit, signal output
Unit；Described control unit is separately connected the signal input unit and signal output unit；Described control unit unit is used for
The driving signal from the signal input unit is received, and defines corresponding control according to preset display panel interface
The corresponding signal conversion circuit of Program Generating, described control unit control the signal conversion circuit and generate the driving signal
Corresponding display signal, and it is transmitted to the display signal output port of the signal output unit.
Preferably, which further includes the power supply connecting with the signal input unit and the signal output unit
Adapter unit；
The power supply transfer unit includes multiple electricity connecting respectively with multiple output ports of the signal output unit
Source translation interface；
The power supply transfer unit is defined according to preset display panel interface, and corresponding power supply translation interface is selected to make institute
It states signal input unit and the signal output unit forms power path.
Preferably, the power supply transfer unit includes power input interface and turntable；
Switching circuit is provided on the turntable；
Rotating the turntable makes the power input interface be connected to the power supply turn by the switching circuit on the turntable
Alias makes the signal input unit and the signal output unit form power path.
Preferably, described control unit is also used to define corresponding control program according to preset display panel interface
The signal output unit is set and the power supply transfer unit is formed between the pin and control unit of power path as high resistant
State.
Preferably, described control unit includes FPGA and configuration FLASH；
Display panel interface, which is previously stored with, in the configuration FLASH defines corresponding control program；
The FPGA reads the corresponding signal conversion circuit of control Program Generating in the configuration FLASH；
The FPGA controls the signal conversion circuit and the corresponding display signal of driving signal generation is transmitted to institute
State the designated port of signal output unit.
Preferably, described control unit further includes delay cell, and the delay cell is for compensating described control unit
The phase loss of signal conversion circuit.
Preferably, the signal input unit is HDMI interface.
Preferably, the signal input unit exports 4 road power supplys and is used to provide voltage to display panel.
On the other hand, the present invention also provides a kind of test device, the interface circuit including above-mentioned any one.
By using a kind of interface circuit provided by the present invention, test device, a certain range of display can be compatible with
Panel, it is only necessary to control program by changing, so that it may change the position of output interface output signal, thus realization and different shaped
Number display panel connection.It is lighted in test in display panel, remakes corresponding connect without the interface according to new product
Interface circuit board significantly shortens the development cycle of new product；The present invention using lower-cost FPGA as control unit, into
One step reduces overall cost.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage
Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 shows the block schematic illustration of interface circuit of the present invention；
Fig. 2 shows a kind of block schematic illustrations of preferred embodiment of interface circuit of the present invention；
Fig. 3 shows a kind of structural schematic diagram of embodiment of interface circuit of the present invention；
Fig. 4 shows the structural schematic diagram of interface circuit another embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, embodiments of the present invention is described in detail.
As shown in Figure 1, the present invention provides a kind of interface circuits, comprising: signal input unit, control unit, signal are defeated
Unit out；Control unit is separately connected signal input unit and signal output unit；Control unit unit is next self-confident for receiving
The driving signal of number input unit, and it is corresponding according to corresponding control Program Generating is defined with preset display panel interface
Signal conversion circuit, control unit controls signal conversion circuit and driving signal is generated corresponding display signal, and is transmitted to letter
The display signal output port of number output unit.
Specifically, as shown in Figure 3 and Figure 4, signal input unit, that is, driving equipment input interface of the invention can use
Existing lighting machine output interface is HDMI-29pin interface, and signal output unit can use board to board connector.In order to reduce
Whole cost, control unit can (Field-Programmable Gate Array, i.e. scene can using the FPGA of low side
Program gate array), wherein preferably, control unit may include FPGA and configuration FLASH；It is previously stored in configuration FLASH
Display panel interface defines corresponding control program；FPGA reads the corresponding signal of control Program Generating in configuration FLASH
Conversion circuit；FPGA controls signal conversion circuit and the corresponding display signal of driving signal generation is transmitted to signal output unit
Designated port.
Wherein, FPGA is internally provided with multiple configurable logic blocks, and the logic of FPGA is by (depositing to configuration FLASH
Storage unit) programming data is loaded to realize.The value of storage in a memory cell determines the logic function of logic unit
And the connection type between each module or between module and I/O, and finally determining function achieved by FPGA, FPGA allows
Unlimited number of programming.Electricity and then secondary when powering under FPGA, needs to reload the logical code inside configuration FLASH.So
The present invention can be defined according to the interface of different display panels, store corresponding control program code in configuration FLASH.
FPGA reads the control program code in configuration FLASH after powering on, the connection for changing internal logic unit generates signal conversion electricity
Driving signal is converted into exporting after display signal from specified interface by road.So being directed to different display panels, every time
The control program in configuration FLASH need to only be changed, different interfaces is just can control and exported, can quickly correspond to unlike signal
Product demand.For example, interface may be implemented and carried out at 1,3,5,7,9 needles by changing the control program in configuration FLASH
Signal output is carried out at signal output or 1,2,3,4,5 needles.
Due to containing biggish power supply signal and the higher MIPI signal of frequency, and fpga chip in signal input unit
I/O interface can not support high current, and power supply signal does not require timing.So preferably, as shown in Fig. 2, this hair
Bright interface circuit can also include the power supply transfer unit connecting with signal input unit and signal output unit；Power supply transfer
Unit includes multiple power supply translation interfaces connecting respectively with multiple output ports of signal output unit；Power supply transfer unit root
It is defined according to preset display panel interface, corresponding power supply translation interface is selected to make signal input unit and signal output unit shape
At power path.
Wherein, as shown in figure 4, power supply transfer unit may include power input interface and turntable；It is provided with and cuts on turntable
Change circuit；Rotation turntable makes power input interface be connected to power supply translation interface by the switching circuit on turntable, inputs signal
Unit and signal output unit form power path.Specifically, power input interface can carry out electricity in the form of binding post
The selection of source signal accesses, and all output interfaces of board to board connector are all drawn out to binding post, in use, fixed according to interface
Justice only need to rotate turntable, be output to power supply signal on the binding post connecting with specified output interface by switching circuit.Such as
HDMI exports 4 road power supply signals, and it is power supply line that display interface, which has multiple routes, and 4 road power supply signals are converted by switching circuit
At being output to specified output interface after multiple power supplies signal.
Wherein preferred, signal input unit includes power supply signal pin, driving signal pin and ground pin, wherein
Power supply signal pin exports 4 road power supplys, PWR1, PWR2, PWR3 and PWR4, for providing voltage for display panel；All drives
Dynamic signal pin connects FPGA, for driving signal to be accessed FPGA.Board to board connector and display panel FPC to be measured
(Flexible Printed Circuit, i.e. flexible print circuit board) connection, for inputting power supply signal and display signal
Display panel carries out display panel to light test.Wherein, board to board connector generally shares 40 pins, and 40 pins are same
When connection FPGA and power -line terminal, Fig. 4 in connecting line only schematically draw, not by the connecting line of 40 pins
All draw.When progress display panel lights test, a part is used as power supply signal in 40 root canal feet of board to board connector
The pin of input line, pin of a part as display signal input line.4 road power supply PWR1 of signal input unit output~
PWR4 is attached by the switching circuit and binding post that are arranged on disk, and power supply signal input is connected with corresponding binding post
Board to board connector specified pin.
Since 40 pins of board to board connector connect FPGA and power -line terminal simultaneously, so power supply signal is easy to lead to
It crosses board to board connector and enters FPGA.The power supply signal of high voltage enters control unit by signal output unit in order to prevent,
The chip for burning out control unit needs to cut off the connection of control unit Yu power supply transfer unit.Wherein preferred, control unit is also
For defining corresponding control program setting signal output unit and power supply transfer list according to preset display panel interface
It is high-impedance state between the pin and control unit of power path that member, which is formed,.Specifically, for example, the pin 1 of board to board connector, 3,
5,7 be the pin as power supply signal input, then needs to prevent power supply signal from flowing into fpga chip by pin 1,3,5,7.Tool
Body, the fpga chip pin connecting with pin 1,3,5,7 is arranged by the control program stored in configuration FLASH in advance
At high-impedance state, so that power supply signal be prevented to enter FPGA.Which pin of fpga chip is specifically arranged to high-impedance state, Ke Yitong
It crosses and allows FPGA to read the control program stored in configuration FLASH in advance and then calculate which pin needs to be arranged to high resistant
State, to prevent power supply signal from inputting FPGA.
Wherein preferably, control unit further includes delay cell, and delay cell is used to compensate the signal conversion of control unit
The phase loss of circuit.For the MIPI signal of signal input unit output and other control control signals, timing pole
To be important, so the transmission of the part is carried out by FPGA.There is delay cell inside FPGA, PFGA internal circuit can be compensated
Phase loss caused by plate cabling.
On the other hand, the present invention also provides a kind of test devices including above-mentioned interface circuit.
By using a kind of interface circuit provided by the present invention, test device, a certain range of display can be compatible with
Panel, it is only necessary to control program by changing, so that it may change output interface out-put supply signal and shows the position of signal, from
And realize the connection with the display panel of different model.It is lighted in test in display panel, without the interface weight according to new product
The corresponding interface card of new production, significantly shortens the development cycle of new product；The present invention uses lower-cost FPGA
As control unit, overall cost further reduced.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (7)
1. a kind of interface circuit characterized by comprising signal input unit, control unit, signal output unit and power supply turn
Order member；Described control unit is separately connected the signal input unit and signal output unit；The power supply transfer unit point
It is not connect with the signal input unit and the signal output unit；
Described control unit for receiving the driving signal from the signal input unit, and according to preset display panel
Interface defines the corresponding signal conversion circuit of corresponding control Program Generating, and described control unit controls the signal conversion electricity
The driving signal is generated corresponding display signal by road, and is transmitted to the display signal output end of the signal output unit
Mouthful；
The power supply transfer unit includes that multiple power supplys connecting respectively with multiple output ports of the signal output unit turn
Alias；The power supply transfer unit is defined according to preset display panel interface, and corresponding power supply translation interface is selected to make institute
It states signal input unit and the signal output unit forms power path；
The power supply transfer unit includes power input interface and turntable；Switching circuit is provided on the turntable；Described in rotation
Turntable makes the power input interface be connected to the power supply translation interface by the switching circuit on the turntable, makes the signal
Input unit and the signal output unit form power path.
2. interface circuit according to claim 1, which is characterized in that described control unit is also used to show according to preset
Show that panel interface defines corresponding control program and the signal output unit and power supply transfer unit formation power supply is arranged
It is high-impedance state between the pin and control unit of access.
3. interface circuit according to claim 1, which is characterized in that described control unit includes FPGA and configuration FLASH；
Display panel interface, which is previously stored with, in the configuration FLASH defines corresponding control program；
The FPGA reads the corresponding signal conversion circuit of control Program Generating in the configuration FLASH；
The FPGA controls the signal conversion circuit and the corresponding display signal of driving signal generation is transmitted to the letter
The designated port of number output unit.
4. interface circuit according to claim 1, which is characterized in that described control unit further includes delay cell, described
Delay cell is used to compensate the phase loss of the signal conversion circuit of described control unit.
5. interface circuit according to claim 1, which is characterized in that the signal input unit is HDMI interface.
6. interface circuit according to claim 1, which is characterized in that the signal input unit exports 4 road power supplys and is used for
Voltage is provided to display panel.
7. a kind of test device, which is characterized in that including interface circuit as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610027733.3A CN105702187B (en) | 2016-01-15 | 2016-01-15 | A kind of interface circuit, test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610027733.3A CN105702187B (en) | 2016-01-15 | 2016-01-15 | A kind of interface circuit, test device |
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| Publication Number | Publication Date |
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| CN105702187A CN105702187A (en) | 2016-06-22 |
| CN105702187B true CN105702187B (en) | 2019-07-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106463098B (en) * | 2016-07-26 | 2018-11-23 | 北京小米移动软件有限公司 | Show equipment and applied to the mainboard in display equipment |
| CN108109567B (en) * | 2017-12-27 | 2021-08-13 | 苏州华兴源创科技股份有限公司 | Liquid crystal module aging testing device and equipment comprising same |
| CN110417660B (en) * | 2019-08-07 | 2022-02-15 | 南方电网科学研究院有限责任公司 | Communication control method, inter-station router device and simulation test system |
| CN110718188A (en) * | 2019-11-20 | 2020-01-21 | 桂林海威科技股份有限公司 | FPGA-based display screen control card output signal conversion method and device |
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|---|---|---|---|---|
| CN201274154Y (en) * | 2008-10-15 | 2009-07-15 | 江苏稳润光电有限公司 | All-compatible device for LED display screen unit board signal interface |
| US20110167465A1 (en) * | 2010-01-04 | 2011-07-07 | Sony Corporation | Device control apparatus, device control method and computer program |
| CN103258467A (en) * | 2013-05-28 | 2013-08-21 | 柳州职业技术学院 | Embedded experimental platform capable of being allocated dynamically and based on modularization |
| CN204314406U (en) * | 2014-12-29 | 2015-05-06 | 深圳市辰卓科技有限公司 | Module test fixture and programmable interface circuit thereof |
| CN204360056U (en) * | 2014-12-19 | 2015-05-27 | 湖南汇盛科技有限公司 | A kind of novel liquid crystal display screen test machine |
-
2016
- 2016-01-15 CN CN201610027733.3A patent/CN105702187B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201274154Y (en) * | 2008-10-15 | 2009-07-15 | 江苏稳润光电有限公司 | All-compatible device for LED display screen unit board signal interface |
| US20110167465A1 (en) * | 2010-01-04 | 2011-07-07 | Sony Corporation | Device control apparatus, device control method and computer program |
| CN103258467A (en) * | 2013-05-28 | 2013-08-21 | 柳州职业技术学院 | Embedded experimental platform capable of being allocated dynamically and based on modularization |
| CN204360056U (en) * | 2014-12-19 | 2015-05-27 | 湖南汇盛科技有限公司 | A kind of novel liquid crystal display screen test machine |
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