CN114446210B - Scaler main board detection method adapting to liquid crystal panel - Google Patents
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 18
- 230000003044 adaptive effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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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
Abstract
The invention discloses a Scaler main board detection method adapting to a liquid crystal panel, wherein a Scaler main board is electrified to start a Boot bootstrap program and call a preset V-By-One standard screen parameter index; loading and writing preset V-By-One standard screen parameters into a bottom register of a main chip By a Scaler main board so as to load a kernel program output picture; the signal detection module detects and collects the V-By-One signal output By the Scaler mainboard, and the PC control host computer analyzes the accuracy of the image data; after the interface detection is finished, the PC control host sends a serial port screen index number instruction to the Scaler main board; the Scaler main board stores the corresponding screen index number based on the serial port instruction and sets the screen index number as a starting screen index and then is powered off. The invention has better detection effect on various mainboards and ports thereof, and has lower production cost and simple and convenient use.
Description
Technical Field
The invention relates to the technical field of liquid crystal panels, in particular to a Scaler main board detection method adapting to a liquid crystal panel.
Background
In recent years, with the maturation of photoelectric technology and semiconductor manufacturing technology, the development of flat panel displays has been actively promoted, wherein Liquid Crystal Displays (LCD) are based on the advantages of low voltage operation, no radiation scattering, light weight, small volume and the like.
As the liquid crystal panel is developed toward high resolution, high refresh rate, and high bit number, data transferred between a Timing Control chip (TCON IC) and a driving chip (driveic) is greatly increased.
With the development of society, the demand of users for ultra-high definition programs is more and more, UHD (Ultra HighDefinition) screens (resolution 3840×2160) are more and more common, and compared with HD (High Definition) screens and FHD (Full High Definition) screens, UHD screens enable users to watch pictures with higher definition and richer details, and more real experience is brought. But the UHD screen must use a new data transmission method: the V-By-One interface can transmit more data in unit time, thereby meeting the dot screen requirement of UHD.
For the liquid crystal panel of the V-By-One interface and the liquid crystal panel of the Tcon-less interface, corresponding matching hardware control driving circuits are required to be designed due to different standard definitions of the interfaces.
The V-By-One signal is added with the HPD and the LOCKN signal as a handshake signal between devices compared with the LVDS (Low-Voltage Differential Signaling) signal, the transmitting unit detects the state of the LOCKN signal in real time, if the level of the LOCKN signal changes from Low to high, the transmitting unit stops outputting the signal, and then reissues the handshake signal until the receiving unit again confirms that the signal is normal, and then pulls the LOCKN signal Low. In the normal use process, the receiving unit receives the stable V-By-One signal and can pull down the LOCKN signal all the time, so that the normal transmission of the V-By-One signal is ensured, and the continuous and stable transmission of the image is realized.
Because the driving principles of the Tcon-less screens of different manufacturers or screens of different sizes of the same manufacturer often have larger differences, the TCON parameter tables in the software are also different.
Because the production capacity of liquid crystal display panel is great, detect the Scaler mainboard that matches different liquid crystal display panel, need design different detection tools, simultaneously because the production capacity of liquid crystal display panel is great, the complete machine of production adaptation different liquid crystal display panel need switch different detection Scaler mainboard tools, has influenced the output efficiency of Scaler mainboard greatly, also very big consumption cost of labor, extravagant effective output time.
Disclosure of Invention
The invention aims to provide a Scaler main board detection method adapting to a liquid crystal panel.
The technical scheme adopted by the invention is as follows:
a detection method of a Scaler mainboard adapting to a liquid crystal panel comprises the steps of adopting a detection Scaler mainboard comprising a Scaler mainboard, a PC control host, a signal detection module and an output display device; the Scaler main board is connected with a signal source, and the output end of the Scaler main board is connected with the signal detection module and the output display equipment; the Scaler main board uniformly outputs V-By-One signals, and the signal detection module detects and collects the V-By-One signals output By the Scaler main board, decodes RGB image signals, and converts the RGB image signals into USB interfaces for output; the PC control host analyzes the data and displays the test result of the Scaler mainboard to be tested; the output display device displays an output image of the Scaler main board; the Scaler main board detection method comprises the following steps:
step 1, powering on a scaler main board to start a Boot bootstrap program, and calling a preset V-By-One standard screen parameter index;
step 2, loading preset V-By-One standard screen parameters on the scaler main board, writing the V-By-One standard screen parameters into a bottom register of a main chip, and loading a kernel program output picture;
step 3, detecting the correctness of signals of each interface signal input and output channel of the Scaler main board, detecting and collecting the V-By-One signals output By the Scaler main board By the PC control host through the signal detection module, and analyzing the accuracy of image data By the PC control host;
step 4, after all interfaces of the Scaler main board are detected, the PC control host sends a serial port screen index number instruction to the Scaler main board, the Scaler main board receives the serial port instruction,
judging whether the screen is a Tcon-less screen; if yes, storing the index number of the Tcon-less screen to the eMMC, setting the index number as the index of the startup screen and shutting down; otherwise, judging that the screen is the V-By-One screen, storing the index number of the V-By-One screen to eMMC, setting the index number as a starting screen index and shutting down the screen;
further, as shown in fig. 3, address 1 on EMMC of Scaler motherboard in step 1 stores a screen index number of Tcon panel, for example: x003000; address 2 on EMMC of Scaler motherboard stores screen index number of Tcon-less panel, for example: x004000.
Powering on, reading data of address 1 x003000 storing the Tcon panel from the EMMC, if the data is 0xFFFF, reading a screen index number of the Tcon-less panel storing the address 2 x004000, outputting as a current Tcon-less screen, and storing the Tcon-less screen index number to factor. If the data of address 1 x003000 is not 0xFFFF, the screen index number representing the Tcon panel is output as the current Tcon screen.
Further, the specific steps of step 3Scaler motherboard detection are as follows:
step 3-1, a test rule configuration table is established according to function interface lists of different Scaler mainboards;
step 3-2, the PC control host sequentially sends a Scaler main board interface detection instruction according to the test rule configuration table, the Scaler main board receives the instruction and switches to a corresponding signal channel, and the PC control host detects and collects the V-By-One signal output By the Scaler main board through the signal detection module and analyzes the accuracy of the image data;
and 3-3, displaying a testing result of the Scaler mainboard by a testing interface of the PC control host, and generating a testing result record.
Further, as shown in fig. 5, the screen index number saving process sets and calls the V-by-one standard screen parameter before the testing of the Scaler motherboard, and is used for displaying the output image, detecting and collecting the image signal data through the signal detection module, and then analyzing the image data by the PC control host, and displaying the testing result of the Scaler motherboard to be tested. Further, the specific procedure of step 4 is as follows:
after the Scaler main board is tested, acquiring a work order of production schedule, and determining whether the Scaler main board of the current batch is used for producing a V-Bye-One screen or a Tcon-less screen in a matching manner according to the work order;
when the method is used for producing the V-By-One screen, the PC control host sends a V-By-One screen index number instruction to the Scaler main board through the serial port, and the Scaler main board receives the V-By-One screen index number and stores the V-By-One screen index number into the eMMC to serve as a startup initialization calling screen parameter to light the V-By-One interface panel;
when the method is used for producing the Tcon-less screen, the PC control host sends a Tcon-less screen index number instruction to the Scaler main board through the serial port, and the Scaler main board receives the Tcon-less screen index number and stores the Tcon-less screen index number to the eMMC to serve as a starting initialization calling screen parameter to light the Tcon-less interface panel.
By adopting the technical scheme, the invention designs the V-By-One screen interface and the Tcon-less screen interface aiming at the Scaler main board, uniformly outputs the V-By-One signal during testing, detects and collects the V-By-One signal data By the signal detection module, and then analyzes the data By the PC control host and displays the test result of the Scaler main board to be tested. The invention adopts a signal detection mode and can be simultaneously matched with LVDS, V-By-One and Tcon-less interface Scaler mainboards for detection.
Drawings
The invention is described in further detail below with reference to the drawings and detailed description;
fig. 1 is a schematic diagram of a Scaler motherboard architecture adopted by a Scaler motherboard detection method adapted to a liquid crystal panel according to the present invention;
fig. 2 is a schematic flow chart of a Scaler motherboard detection method adapting to a liquid crystal panel according to the present invention;
FIG. 3 is a schematic diagram of a screen index number storage structure and a detection flow;
FIG. 4 is a diagram illustrating the index number preservation process according to the present invention;
fig. 5 is a schematic diagram of a schematic architecture of a signal detection module according to the present invention.
Detailed Description
For the purposes, technical solutions and advantages of the embodiments of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In order to improve the stability of the Scaler motherboard of the television, before the television or the Scaler motherboard inside the television flows to the market, performance test is required to be performed on the Scaler motherboard of the television so as to ensure the use stability of the Scaler motherboard of the television.
The existing Scaler motherboard detection method is to detect the appearance of the Scaler motherboard by using a manual work, and detect the interfaces such as an audio interface, a USB interface, an HMDI interface, an AV interface, an RF interface and the like on the Scaler motherboard. The required Scaler motherboard test items can only be tested item by item manually at present. On the one hand, the existing Scaler mainboard detection method cannot cover detection on the aspect of Scaler mainboard performance, and has the problems of labor consumption, time and labor waste, complex operation, inconvenient recording of test results and the like. On the other hand, the existing Scaler main board detection method utilizes manpower to detect the Scaler main board, has low efficiency, is easy to cause artificial misjudgment, and has certain defects in the aspect of accuracy; the detection result has larger correlation with the detection level of the detection personnel and poorer objectivity. Therefore, how to rapidly and accurately monitor the quality and performance of the Scaler main board to meet the production requirement of the whole liquid crystal television is a problem to be solved.
As shown in fig. 1, the detection Scaler motherboard adopted in the detection method of the present invention includes a Scaler motherboard, a PC control host, a signal detection module, and an output display device; the Scaler main board is connected with a signal source, and the output end of the Scaler main board is connected with the signal detection module and the output display equipment; the Scaler main board uniformly outputs the V-By-One signals, as shown in fig. 5, the signal detection module detects and collects the V-By-One signals output By the Scaler main board, decodes the RGB image signals, and converts the RGB image signals into USB interfaces for output; the PC control host analyzes the data and displays the test result of the Scaler mainboard to be tested; the output display device displays an output image of the Scaler main board.
Specifically, the Scaler motherboard may be used as a V-By-One screen, or may be applied to a Tcon-less screen, and the V-By-One signal is output uniformly during testing, the signal detection module detects and collects the V-By-One signal data, and the PC control host analyzes the data and displays the test result of the Scaler motherboard to be tested.
As shown in fig. 2, the invention discloses a Scaler motherboard detection method adapting to a liquid crystal panel, which comprises the following steps:
step 1, powering on a scaler main board to start a Boot bootstrap program, and calling a preset V-By-One standard screen parameter index;
step 2, loading preset V-By-One standard screen parameters on the scaler main board, writing the V-By-One standard screen parameters into a bottom register of a main chip, and loading a kernel program output picture;
step 3, detecting the correctness of signals of each interface signal input and output channel of the Scaler main board, detecting and collecting the V-By-One signals output By the Scaler main board By the PC control host through the signal detection module, and analyzing the accuracy of image data By the PC control host;
step 4, after all interfaces of the Scaler main board are detected, the PC control host sends a serial port screen index number instruction to the Scaler main board, the Scaler main board receives the serial port instruction,
judging whether the screen is a Tcon-less screen; if yes, storing the index number of the Tcon-less screen to the eMMC, setting the index number as the index of the startup screen and shutting down; otherwise, judging that the screen is the V-By-One screen, storing the index number of the V-By-One screen to eMMC, setting the index number as a starting screen index and shutting down the screen;
further, as shown in fig. 3, address 1 on EMMC of Scaler motherboard in step 1 stores a screen index number of Tcon panel, for example: x003000; address 2 on EMMC of Scaler motherboard stores screen index number of Tcon-less panel, for example: x004000.
Powering on, reading data of address 1 x003000 storing the Tcon panel from the EMMC, if the data is 0xFFFF, reading a screen index number of the Tcon-less panel storing the address 2 x004000, outputting as a current Tcon-less screen, and storing the Tcon-less screen index number to factor. If the data of address 1 x003000 is not 0xFFFF, the screen index number representing the Tcon panel is output as the current Tcon screen.
Further, the specific steps of step 3Scaler motherboard detection are as follows:
step 3-1, a test rule configuration table is established according to function interface lists of different Scaler mainboards;
step 3-2, the PC control host sequentially sends a Scaler main board interface detection instruction according to the test rule configuration table, the Scaler main board receives the instruction and switches to a corresponding signal channel, and the PC control host detects and collects the V-By-One signal output By the Scaler main board through the signal detection module and analyzes the accuracy of the image data;
and 3-3, displaying a testing result of the Scaler mainboard by a testing interface of the PC control host, and generating a testing result record.
Further, as shown in fig. 4, the screen index number saving process sets and calls the V-by-one standard screen parameter before the testing of the Scaler motherboard, and is used for displaying the output image, detecting and collecting the image signal data through the signal detection module, and then analyzing the image data by the PC control host, and displaying the testing result of the Scaler motherboard to be tested. Further, the specific procedure of step 4 is as follows:
after the Scaler main board is tested, acquiring a work order of production schedule, and determining whether the Scaler main board of the current batch is used for producing a V-Bye-One screen or a Tcon-less screen in a matching manner according to the work order;
when the method is used for producing the V-By-One screen, the PC control host sends a V-By-One screen index number instruction to the Scaler main board through the serial port, and the Scaler main board receives the V-By-One screen index number and stores the V-By-One screen index number into the eMMC to serve as a startup initialization calling screen parameter to light the V-By-One interface panel;
when the method is used for producing the Tcon-less screen, the PC control host sends a Tcon-less screen index number instruction to the Scaler main board through the serial port, and the Scaler main board receives the Tcon-less screen index number and stores the Tcon-less screen index number to the eMMC to serve as a starting initialization calling screen parameter to light the Tcon-less interface panel.
The invention adopts the technical scheme to solve the following problems: although the Scaler mainboard is designed with the interfaces of the V-By-One screen and the Tcon-less screen, the testing of the Scaler mainboard respectively needs the testing tools of the V-By-One interface and the Tcon-less interface; 2. because of Tcon-less screens of different manufacturers or screens of different sizes of the same manufacturer, the driving principles of the screens often have larger difference, and the problem that a plurality of Scaler main board signal testing tools are needed; each input interface of the scaler mainboard and each output processing loop can be configured for testing, so that reliability is provided; meanwhile, an automatic test method is adopted, so that the test efficiency is improved.
The invention can automatically test the Scaler main board and automatically output test results, is mainly used for detecting various Scaler main boards and ports on the Scaler main board, has better detection effect, and has lower production cost and simple and convenient use.
It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. Embodiments and features of embodiments in this application may be combined with each other without conflict. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Claims (3)
1. A detection method of a Scaler mainboard adapting to a liquid crystal panel comprises the steps of adopting a detection Scaler mainboard comprising a Scaler mainboard, a PC control host, a signal detection module and an output display device; the Scaler main board is connected with a signal source, and the output end of the Scaler main board is connected with the signal detection module and the output display equipment; the Scaler main board uniformly outputs V-By-One signals, and the signal detection module detects and collects the V-By-One signals output By the Scaler main board, decodes RGB image signals, and converts the RGB image signals into USB interfaces for output; the PC control host analyzes the data and displays the test result of the Scaler mainboard to be tested; the output display device displays an output image of the Scaler main board; the method is characterized in that: the Scaler main board detection method comprises the following steps:
step 1, powering on a scaler main board to start a Boot bootstrap program, and calling a preset V-By-One standard screen parameter index;
step 2, loading preset V-By-One standard screen parameters on the scaler main board, writing the V-By-One standard screen parameters into a bottom register of a main chip, and loading a kernel program output picture;
step 3, detecting the correctness of signals of each interface signal input and output channel of the Scaler main board, detecting and collecting the V-By-One signals output By the Scaler main board By the PC control host through the signal detection module, and analyzing the accuracy of image data By the PC control host;
step 4, after all interfaces of the Scaler main board are detected, the PC control host sends a serial port screen index number instruction to the Scaler main board; the Scaler main board receives the serial port instruction, stores the corresponding screen index number, sets the screen index number as a starting screen index, and then shuts down; the specific steps of the step 4 are as follows:
after the Scaler main board is tested, acquiring a work order of production schedule, and determining whether the Scaler main board of the current batch is used for producing a V-Bye-One screen or a Tcon-less screen in a matching manner according to the work order;
when the method is used for producing the V-By-One screen, the PC control host sends a V-By-One screen index number instruction to the Scaler main board through the serial port, and the Scaler main board receives the V-By-One screen index number and stores the V-By-One screen index number into the eMMC to serve as a startup initialization calling screen parameter to light the V-By-One interface panel;
when the method is used for producing the Tcon-less screen, the PC control host sends a Tcon-less screen index number instruction to the Scaler main board through the serial port, and the Scaler main board receives the Tcon-less screen index number and stores the Tcon-less screen index number to the eMMC to serve as a starting initialization calling screen parameter to light the Tcon-less interface panel.
2. The method for detecting a Scaler motherboard of an adaptive liquid crystal panel according to claim 1, wherein the method comprises the following steps: in the step 1, address 1 on EMMC of Scaler motherboard stores screen index number of Tcon panel, address 2 on EMMC of Scaler motherboard stores screen index number of Tcon-less panel; the specific calling steps are as follows:
step 1-1, powering on and powering on, reading the data of address 1 storing Tcon panel from EMMC,
step 1-2, judging whether the data at the address 1 is 0xFFFF; if yes, executing the step 1-3; otherwise, the data of the address 1 is not 0xFFFF, which indicates a screen index number of a Tcon panel, reads the data to be output as a current Tcon screen, and ends the call of the screen index number;
and 1-3, reading a screen index number of a Tcon-less panel storing address 2, serving as the current Tcon-less screen output, and storing the Tcon-less screen index number into a factor.
3. The method for detecting a Scaler motherboard of an adaptive liquid crystal panel according to claim 1, wherein the method comprises the following steps: the specific steps of step 3Scaler motherboard detection are as follows:
step 3-1, a test rule configuration table is established according to function interface lists of different Scaler mainboards;
step 3-2, the PC control host sequentially sends a Scaler main board interface detection instruction according to the test rule configuration table, the Scaler main board receives the instruction and switches to a corresponding signal channel, and the PC control host detects and collects the V-By-One signal output By the Scaler main board through the signal detection module and analyzes the accuracy of the image data;
and 3-3, displaying a testing result of the Scaler mainboard by a testing interface of the PC control host, and generating a testing result record.
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| CN208402035U (en) * | 2018-07-06 | 2019-01-18 | 青岛智动精工电子有限公司 | A kind of switching controller detecting TV motherboard V-BY-ONE signal |
| CN109068132A (en) * | 2018-08-22 | 2018-12-21 | 广州视源电子科技股份有限公司 | A kind of test method, device, equipment and the storage medium of VBO display interface |
| CN110139096A (en) * | 2019-04-17 | 2019-08-16 | 深圳康佳电子科技有限公司 | TV automated testing method, storage medium, TV and external detection equipment |
| CN211017466U (en) * | 2019-10-30 | 2020-07-14 | 苏州三星显示有限公司 | Switching device for display panel detection |
| CN111405202A (en) * | 2020-03-24 | 2020-07-10 | 深圳创维－Rgb电子有限公司 | TCON L ESS mainboard signal conversion device and detection system |
| CN112492304A (en) * | 2020-12-04 | 2021-03-12 | 广州晶序达电子科技有限公司 | TCON board and TCONLESS mainboard functional test system |
| CN113391143A (en) * | 2021-05-11 | 2021-09-14 | Tcl王牌电器(惠州)有限公司 | Automatic test system and automatic test method |
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