CN103105684A - Test method, device, system and test equipment of liquid crystal display module - Google Patents
Test method, device, system and test equipment of liquid crystal display module Download PDFInfo
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Abstract
The invention discloses a test method, a device, a system and test equipment of liquid crystal display module. The test method, the device and the system and the test equipment of liquid crystal display module are used for improving test efficiency of a liquid crystal display module test and compatibility of the test equipment, wherein the liquid crystal display module test system comprises an upper computer, a liquid crystal test control device, a driving circuit and a liquid crystal test module. The upper computer are connected with at least two liquid crystal test control devices, each liquid crystal test control device is connected with at least two liquid crystal display modules through the driving circuit, and the liquid crystal test control device is connected with the driving circuit through a liquid crystal driving connector. The upper computer is used for sending a liquid crystal driving connector initializing instruction to the liquid crystal test control device. The liquid crystal test control device is used for conducting initialization on the liquid crystal driving connector after receiving the liquid crystal driving connector initializing instruction. Test images which are downloaded from the upper computer can be transmitted and displayed to each liquid display module through the driving circuit.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to a kind of LCD MODULE method of testing, device, system and testing apparatus.
Background technology
LCD MODULE (LCM, Liquid Crystal Display Module) is a kind of assembly that liquid crystal display device, web member, integrated circuit and wiring board and backlight are assembled together.Liquid crystal display device shows image by rotation or the deflection angle of controlling liquid crystal, and backlight provides light source to liquid crystal display device (that is, display panels), for liquid crystal display device display frame.In order to ensure the LCD MODULE quality, in the process that it is developed, must test display quality, reliability and the optical property of LCD MODULE.
because present LCD MODULE mainly contains micro-control unit (MCU, Micro Control Unit) interface, serial peripheral equipment (SPI, Serial Peripheral Interface) interface, CPU (central processing unit) (CPU, Central Processing Unit) interface, RGB (Red Green Blue) interface, Low Voltage Differential Signal (LVDS, Low-Voltage Differential Signaling) interface, transition minimized differential signaling (TMDS) interface, the Mini-LVDS interface, low-swing difference signal (RSDS, Reduced Swing Differential Signal) etc., and DP(Display Port) interface, mobile industry processor (MIPI, Mobile Industry Processor Interface) interface etc., and same testing apparatus is only supported some interface modes seldom usually, particularly present original large scale liquid crystal display product line makes the transition and does small-size liquid crystal displays, owing to not supporting the initialization interface that small-size liquid crystal displays needs on existing testing apparatus, cause the compatible relatively poor of testing apparatus, the LCD MODULE limited amount that can connect due to a testing apparatus simultaneously causes testing efficiency lower.
Summary of the invention
The embodiment of the present invention provides a kind of LCD MODULE method of testing, device, system and testing apparatus, in order to the testing efficiency that improves LCD MODULE test and the compatibility of testing apparatus.
The embodiment of the present invention provides a kind of liquid crystal display module test system, comprises host computer, liquid crystal test control device, driving circuit and LCD testing, wherein:
At least two liquid crystal test control devices of described host computer connect; Each liquid crystal test control device is connected with at least two LCD MODULE by driving circuit, is connected by the liquid crystal drive interface between described liquid crystal test control device and described driving circuit;
Described host computer is used for sending liquid crystal drive interface initialization instruction to described liquid crystal test control device;
Described liquid crystal test control device is used for after receiving described liquid crystal drive interface initialization instruction, described liquid crystal drive interface being carried out initialization; And download test pattern from described host computer, be transferred to each LCD MODULE by described driving circuit and show.
The embodiment of the present invention provides a kind of LCD MODULE method of testing, comprising:
The liquid crystal test control device receives the liquid crystal drive interface initialization instruction that host computer sends;
Described liquid crystal test control device carries out initialization according to described liquid crystal drive interface initialization instruction to the liquid crystal drive interface;
The test pattern of described liquid crystal test control device reading pre-stored is transferred to LCD MODULE and shows, wherein, described test pattern is that described liquid crystal test control device is downloaded and stored from described host computer.
The embodiment of the present invention provides a kind of LCM test device, comprising:
Microprocessor is used for downloading and store test pattern from host computer in advance; And the liquid crystal drive interface initialization instruction of reception host computer transmission;
The liquid crystal display control module is used for according to described liquid crystal drive interface initialization instruction, the liquid crystal drive interface being carried out initialization; And read described test pattern be transferred to LCD MODULE and show from described microprocessor.
The embodiment of the present invention provides a kind of testing apparatus, comprises above-mentioned LCM test device.
the LCD MODULE method of testing that the embodiment of the present invention provides, device, system and testing apparatus, host computer is connected with at least two liquid crystal test control devices, each liquid crystal test control device, be connected with at least two LCD MODULE by driving circuit, be connected by the liquid crystal drive interface between liquid crystal test control device and driving circuit, like this, when LCD MODULE is tested, because host computer can be controlled a plurality of liquid crystal test control devices simultaneously, each liquid crystal test control device can be tested a plurality of LCD MODULE simultaneously, thereby can improve testing efficiency, simultaneously, be connected by the liquid crystal drive interface due between liquid crystal test control device and driving circuit, when reality is tested, can design as required different liquid crystal drive interfaces, make the liquid crystal test control device to test the LCD MODULE of distinct interface, thereby improved compatibility.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the instructions of writing, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of a part of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is in the embodiment of the present invention, the structural representation of liquid crystal display module test system;
Fig. 2 is in the embodiment of the present invention, the syndeton schematic diagram between FPGA and driving circuit and power supply;
Fig. 3 is in the embodiment of the present invention, FPGA structural design schematic diagram;
Fig. 4 is in the embodiment of the present invention, the implementing procedure schematic diagram of LCD MODULE method of testing;
Fig. 5 is in the invention process illustration, the structural representation of liquid crystal test control device.
Embodiment
For the testing efficiency that improves the LCD MODULE test and the compatibility that improves testing apparatus, the embodiment of the present invention provides a kind of LCD MODULE method of testing, device, system and testing apparatus.
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein only is used for description and interpretation the present invention, be not intended to limit the present invention, and in the situation that do not conflict, embodiment and the feature in embodiment in the present invention can make up mutually.
As shown in Figure 1, the structural representation of the liquid crystal display module test system that provides for the embodiment of the present invention comprises host computer 101, liquid crystal test control device 102, driving circuit 103 and LCD testing 104.Liquid crystal display module test system structure shown in Figure 1 is as follows: host computer 101 is connected with at least two liquid crystal test control devices 102; Each liquid crystal test control device 102 is connected with at least two LCD MODULE 104 by driving circuit 103, is connected by the liquid crystal drive interface between liquid crystal test control device 102 and driving circuit 103, wherein:
Liquid crystal test control device 102 is used for after receiving liquid crystal drive interface initialization instruction, the liquid crystal drive interface being carried out initialization; And download test pattern from host computer 101, be transferred to each LCD MODULE 104 by driving circuit 103 and show.
Preferably, host computer 101 passes through USB interface or 485 interfaces or network interface and is connected with each liquid crystal test control device 102, when specifically implementing, can select different interfaces according to data volume size and the desired transfer rate of institute's the transmission of data.
During concrete enforcement, the liquid crystal drive interface comprises the single-ended drive signaling interfaces such as MCU interface, SPI interface, rgb interface, also can test needs according to reality and reserve LVDS interface, MIPI interface and DP interface, RSDS interface, Mini-LVDS interface, cpu i/f, TMDS interface etc., the embodiment of the present invention is not construed as limiting this.
During concrete enforcement, liquid crystal test control device 102 can be used for and will be stored in internal storage or external memory storage from the test pattern that host computer 101 is downloaded; And after the initialization of completing the liquid crystal drive interface, internally in storer or external memory storage the read test image to buffer memory, and from buffer memory the read test image, be transferred to each LCD MODULE 104 by driving circuit 103 and show.
In order to satisfy the LCD MODULE testing requirement, preferably, in the embodiment of the present invention, liquid crystal test control device partial function can be by FPGA(Field-Programmable Gate Array, i.e. field programmable gate array) technology realizes.Realize the repertoire of data communication, storage and steering logic in FPGA inside, its integrated level is high, favorable expandability, as shown in Figure 2, be the syndeton schematic diagram between FPGA and driving circuit and power supply, integrated internal storage FLASH on FPFA, DDR(Double Data Rate) storer, with the interface (such as 485 interfaces, USB interface or network interface etc.) of host computer and flash memory (CF, Compact Flash) interface etc.
During specific implementation, microprocessor can be embedded in FPGA, be realized the partial function of microprocessor by FPGA, like this, can be completed by microprocessor the functions such as interface communication, reading and writing data and control, realize the liquid crystal drive interface control logic by FPGA.
Based on this, in the embodiment of the present invention, a kind of possible FPGA structural design as shown in Figure 3, it is comprised of microprocessor 301 and liquid crystal display control module 302.
During concrete enforcement, microprocessor 301 comprises memory cell 3011, main control unit 3012 and input-output unit 3013, wherein:
Memory cell 3011, main be responsible for to the storage of image information and and to the storage of liquid crystal display control module 302 instructions, comprise the FLASH controller, be used for the FLASH storer is controlled, the CF controller is used for CF is controlled, SPI FLASH controller, be used for SPI FLASH is controlled, dual-port controller is used for DDR and internal RAM are controlled;
Main control unit 3012, it is the control and management unit of whole system, complete the control and management to memory cell 3011, to the protocol processes of input-output unit 3013 and control, liquid crystal cells control and management and and user's the function such as mutual, comprise MicroBlaze data RAM, instruction RAM, Timer/Counter and interrupt module;
Input-output unit 3013, mainly be responsible for the mutual and reception and registration to sending instructions under host computer with the user, comprise the output of GPIO(universal input) interface, 485 interfaces, SPI interface etc., wherein, the GPIO interface is connected with user interactive module, and 485 interface logics are connected with PC, and the SPI interface is used for realizing the SPI interface function.
liquid crystal display control module 302 comprises video memory controller 3021, liquid crystal drive interface logic controller 3022, and liquid crystal drive interface 3,023 three parts, wherein, video memory controller 3021 is connected with liquid crystal drive interface logic controller with the dual-port controller of memory cell 3011 respectively and is connected, be used for after the liquid crystal drive interface initialization instruction that host computer issues, read the view data of its storage from memory cell 3011, and according to the liquid crystal drive interface type, the view data that reads is converted to the view data of the corresponding form of this liquid crystal drive interface type, liquid crystal drive interface logic controller 3022 is connected with the liquid crystal drive interface with the interrupt module of main control unit 3012 respectively and is connected, liquid crystal drive interface 3023 outwards is connected with driving circuit 103.
Preferably, driving circuit 103 can drive the LCD MODULE more than 10, and satisfy the message transmission rate requirement of the highest 105MHZ, for single-ended signal, daisy chain topology is adopted in the driving circuit design, alleviates the load pressure of single driving circuit with the mode of grouping multiple drive power, simultaneously, suitably the design matched impedance, ensure signal integrity.
Based on same inventive concept, a kind of LCD MODULE method of testing, device and testing apparatus also are provided in the embodiment of the present invention, because the principle that said method, device and equipment are dealt with problems is similar to liquid crystal display module test system, therefore the enforcement of said method, device and equipment can referring to the enforcement of system, repeat part and repeat no more.
As shown in Figure 4, the implementing procedure schematic diagram of the LCD MODULE method of testing that provides for the embodiment of the present invention comprises the following steps:
S401, liquid crystal test control device receive the liquid crystal drive interface initialization instruction that host computer sends;
S402, liquid crystal test control device carry out initialization according to liquid crystal drive interface initialization instruction to the liquid crystal drive interface;
The test pattern of S403, liquid crystal test control device reading pre-stored is transferred to LCD MODULE and shows.
during concrete enforcement, the liquid crystal test control device can be downloaded test pattern and be stored in local internal storage or external memory storage from host computer, like this, after completing the liquid crystal drive interface initialization, read test image in storer or external memory storage internally, restriction due to internal storage or external memory storage processing speed, during concrete enforcement, can be in advance storer or external memory storage read in buffer memory (for example DDR) internally with test pattern, then, the read test image transmitting shows to the liquid crystal display module from DDR again.Wherein, test pattern can be for a plurality of, and like this, LCM test device can all read in each test pattern in buffer memory in advance, then read each test pattern in successively can buffer memory and be transferred to each LCD MODULE.
As shown in Figure 5, the structural representation of the liquid crystal test control device that provides for the embodiment of the present invention comprises:
Liquid crystal display control module 502 is used for according to described liquid crystal drive interface initialization instruction, the liquid crystal drive interface being carried out initialization; And read described test pattern be transferred to LCD MODULE and show from microprocessor 501.
during concrete enforcement, microprocessor 501 can be downloaded test pattern and be stored in local internal storage or external memory storage from host computer, like this, liquid crystal display control module 502 is after completing the liquid crystal drive interface initialization, read test image in storer or external memory storage internally, restriction due to internal storage or external memory storage processing speed, during concrete enforcement, can be in advance storer or external memory storage read in buffer memory (for example DDR) internally with test pattern, then, the read test image transmitting shows to the liquid crystal display module from DDR again.Wherein, test pattern can be for a plurality of, and like this, LCM test device can all read in each test pattern in buffer memory in advance, then read each test pattern in successively can buffer memory and be transferred to each LCD MODULE.
Need to prove, above-mentioned LCM test device can be arranged in testing apparatus, be to be understood that, it is a kind of better embodiment of the present invention that LCM test device is arranged in testing apparatus, during concrete enforcement, LCM test device can also be arranged on miscellaneous equipment, for example in newly added equipment.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is that reference is described according to process flow diagram and/or the block scheme of method, equipment (system) and the computer program of the embodiment of the present invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or the combination of square frame.Can provide these computer program instructions to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computing machine or other programmable data processing device produce to be used for the device of realizing in the function of flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame.
These computer program instructions also can be loaded on computing machine or other programmable data processing device, make on computing machine or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby be provided for realizing the step of the function of appointment in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame in the instruction of carrying out on computing machine or other programmable devices.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a liquid crystal display module test system, is characterized in that, comprises host computer, liquid crystal test control device, driving circuit and LCD testing, wherein:
Described host computer is connected with at least two liquid crystal test control devices; Each liquid crystal test control device is connected with at least two LCD MODULE by driving circuit, is connected by the liquid crystal drive interface between described liquid crystal test control device and described driving circuit;
Described host computer is used for sending liquid crystal drive interface initialization instruction to described liquid crystal test control device;
Described liquid crystal test control device is used for after receiving described liquid crystal drive interface initialization instruction, the liquid crystal drive interface being carried out initialization; And download test pattern from described host computer, be transferred to each LCD MODULE by described driving circuit and show.
2. the system as claimed in claim 1, is characterized in that,
Described liquid crystal test control device, the concrete test pattern that is used for downloading is stored in internal storage or external memory storage; And after the initialization of completing the liquid crystal drive interface, read internally described test pattern in storer or external memory storage to buffer memory, and read described test pattern from buffer memory, be transferred to each LCD MODULE by described driving circuit and show.
3. the system as claimed in claim 1, is characterized in that,
Described host computer passes through USB interface or 485 interfaces or network interface and is connected with described liquid crystal test control device.
4. as claim 1,2 or 3 described systems, it is characterized in that, described liquid crystal drive interface comprises micro-control unit MCU interface, serial peripheral equipment SPI interface, RGB rgb interface, Low Voltage Differential Signal LVDS interface, mobile industry processor MIPI interface and display port DP interface, low-swing difference signal RSDS interface, Mini-LVDS interface, central processing unit CPU interface, transition minimized differential signaling TMDS interface.
5. a LCD MODULE method of testing, is characterized in that, comprising:
The liquid crystal test control device receives the liquid crystal drive interface initialization instruction that host computer sends;
Described liquid crystal test control device carries out initialization according to described liquid crystal drive interface initialization instruction to the liquid crystal drive interface;
The test pattern of described liquid crystal test control device reading pre-stored is transferred to LCD MODULE and shows, wherein, described test pattern is that described liquid crystal test control device is downloaded and stored from described host computer.
6. method as claimed in claim 5, is characterized in that, described test pattern is stored in internal storage or external memory storage; And
The test pattern of described liquid crystal test control device reading pre-stored is transferred to LCD MODULE and shows, specifically comprises:
Described liquid crystal test control device reads described test pattern to buffer memory from described internal storage or external memory storage; And
Reading described test pattern from buffer memory is transferred to LCD MODULE and shows.
7. method as described in claim 5 or 6, it is characterized in that, described liquid crystal drive interface comprises micro-control unit MCU interface, serial peripheral equipment SPI interface, RGB rgb interface, Low Voltage Differential Signal LVDS interface, mobile industry processor MIPI interface and display port DP interface, low-swing difference signal RSDS interface, Mini-LVDS interface, central processing unit CPU interface, transition minimized differential signaling TMDS interface.
8. a liquid crystal test control device, is characterized in that, comprising:
Microprocessor is used for downloading and store test pattern from host computer in advance; And the liquid crystal drive interface initialization instruction of reception host computer transmission;
The liquid crystal display control module is used for according to described liquid crystal drive interface initialization instruction, the liquid crystal drive interface being carried out initialization; And read described test pattern be transferred to LCD MODULE and show from described microprocessor.
9. device as claimed in claim 8, is characterized in that, described test pattern is stored in internal storage or external memory storage; And
Described liquid crystal display control module, concrete being used for read described test pattern to buffer memory from described internal storage or external memory storage; And read described test pattern be transferred to LCD MODULE and show from buffer memory.
10. a testing apparatus, is characterized in that, comprises the described device of claim 8 or 9.
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| CN103323962A (en) * | 2013-06-19 | 2013-09-25 | 无锡博一光电科技有限公司 | Testing method for MIPI (Mobile Industry Processor Interface) full high definition liquid crystal display |
| CN103475841A (en) * | 2013-09-25 | 2013-12-25 | 武汉精立电子技术有限公司 | Method for converting LVDS video signals into 8 LANE horizontally-split-screen MIPI video signals |
| CN104517554A (en) * | 2014-12-17 | 2015-04-15 | 武汉精测电子技术股份有限公司 | Vcom (voltage of common electrode) adjustment device and method of MIPI (mobile industry processor interface) liquid crystal module on basis of FPGA (field programmable gate array) |
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