CN114446210A - Scaler mainboard detection method adaptive to liquid crystal panel - Google Patents
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- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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Abstract
The invention discloses a Scaler mainboard detection method adaptive to a liquid crystal panel, which is characterized in that a Boot bootstrap program is started on a Scaler mainboard, and a preset V-By-One standard screen parameter index is called; the Scaler mainboard loads and writes preset V-By-One standard screen parameters into a bottom register of a main chip so as to load a kernel program output picture; the signal detection module detects and collects a V-By-One signal output By the Scaler mainboard, and the PC controls the host to analyze 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 mainboard; and the Scaler mainboard stores the corresponding screen index number based on the serial port instruction, sets the screen index number as a startup screen index and then shuts down the screen. The invention has better detection effect on various mainboards and ports thereof, and has the advantages of 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 mainboard detection method adaptive to a liquid crystal panel.
Background
In recent years, with the maturity of electro-optical technology and semiconductor manufacturing technology, the development of flat panel displays has been driven, wherein the LCD is based on its advantages of low voltage operation, no radiation scattering, light weight and small volume.
As the liquid crystal panel is developed toward high resolution, high refresh rate and high bit number, data transmitted between a Timing Control (TCON) IC and a driving chip (drivernic) is greatly increased.
With the development of society, users have more and more demands on ultra-High definition programs, and UHD (ultra High definition) screens (resolution 3840 × 2160) are more and more popular, and compared with hd (High definition) screens and fhd (full High definition) screens, UHD screens can enable users to view pictures with higher definition and richer details, thereby bringing more real experience. However, UHD screens must use a new data transmission method: the standard interface can transmit more data in unit time, thereby meeting the demand of UHD on-screen.
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 drive circuits need to be designed because the standard definitions of the interfaces are different.
Compared with an LVDS (Low-Voltage Differential Signaling) signal, the V-By-One signal adds an HPD (high-Voltage Differential Signaling) signal and a LOCKN (Low-Voltage Differential Signaling) signal as handshake signals between devices, the sending unit can detect the state of the LOCKN signal in real time, if the level of the LOCKN signal is changed from Low to high, the sending unit stops outputting the signal, then sends out the handshake signals again, and pulls the LOCKN signal down until the receiving unit confirms normal again. 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 to ensure the normal transmission of the V-By-One signal so as to ensure the continuous and stable transmission of the image.
The TCON parameter tables in the software are different because the driving principles of the screens of different manufacturers or the screens of different sizes of the same manufacturer are different greatly.
Because liquid crystal display panel's production volume is great, detects to the Scaler mainboard that matches different liquid crystal display panel, need design different detection system utensil, simultaneously because liquid crystal display panel's production volume is great, the complete machine of the different liquid crystal display panel of production adaptation needs to switch different detection Scaler mainboard system utensils, has influenced the output efficiency of Scaler mainboard greatly, also very big consumption the cost of labor, extravagant effective output time.
Disclosure of Invention
The invention aims to provide a Scaler mainboard detection method adaptive to a liquid crystal panel.
The technical scheme adopted by the invention is as follows:
a method for detecting a Scaler mainboard adaptive to a liquid crystal panel adopts a method for detecting the Scaler mainboard, wherein the method comprises the steps of detecting the Scaler mainboard, a PC control host, a signal detection module and output display equipment; the Scaler mainboard is connected with a signal source, and the output end of the Scaler mainboard is connected with the signal detection module and the output display equipment; the Scaler mainboard uniformly outputs a V-By-One signal, the signal detection module detects and collects the V-By-One signal output By the Scaler mainboard, decodes an RGB image signal and converts the RGB image signal into a USB interface for output; the PC control host computer analyzes the data and displays the test result of the Scaler mainboard to be tested; the output display equipment displays an output image of the Scaler mainboard; the Scaler mainboard detection method comprises the following steps:
step 1, a Boot bootstrap program is started By electrifying a Scaler mainboard, and a preset V-By-One standard screen parameter index is called;
step 2, loading preset V-By-One standard screen parameters By the Scaler mainboard, 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 the signals of the input and output channels of each interface signal of the Scaler mainboard, detecting and collecting the V-By-One signal output By the Scaler mainboard through a signal detection module By the PC control host, and analyzing the accuracy of image data By the PC control host;
step 4, after all the interfaces of the Scaler mainboard are detected, the PC control host sends a serial port screen index number instruction to the Scaler mainboard, the Scaler mainboard receives the serial port instruction,
judging whether the screen is a Tcon-less screen; if so, storing the Tcon-less screen index number to the eMMC, setting the index as a startup screen index, and powering off; otherwise, judging that the screen is a V-By-One screen, storing the V-By-One screen index number into the eMMC, setting the V-By-One screen index number as a power-on screen index, and powering off;
further, as shown in fig. 3, address 1 on EMMC of the Scaler motherboard in step 1 stores the screen index number of Tcon panel, for example: x 003000; address 2 on the EMMC of the Scaler motherboard stores the screen index number of the Tcon-less panel, for example: x 004000.
Powering on and starting up, reading data of an address 1 x003000 for storing a Tcon panel from the EMMC, if the data is 0xFFFF, reading a screen index number of a Tcon-less panel of a storage address 2 x004000, outputting the screen index number as a current Tcon-less screen, and storing the Tcon-less screen index number to factor.db; if the data for address 1 x003000 is not 0xFFFF, the screen index number representing Tcon panel is output as the current Tcon screen.
Further, step 3, the specific steps of the Scaler mainboard detection are as follows:
step 3-1, establishing a test rule configuration table according to function interface lists of different Scaler mainboards;
3-2, the PC control host sequentially sends a Scaler mainboard interface detection instruction according to a test rule configuration table, the Scaler mainboard receives the instruction and switches to a corresponding signal channel, and the PC control host detects and collects a V-By-One signal output By the Scaler mainboard through a signal detection module and analyzes the accuracy of image data;
and 3-3, displaying the testing result of the Scaler mainboard on the testing interface of the PC control host, and generating a testing result record.
Further, as shown in fig. 5, in the screen index number saving process, before the Scaler motherboard test, the screen index number is set and called according to the V-by-one standard to display the output image, the signal detection module detects the collected image signal data, and the PC controls the host to analyze the image data and display the test result of the Scaler motherboard to be tested. Further, the specific steps of step 4 are as follows:
after the Scaler mainboard is tested, acquiring a work order of production scheduling, and determining whether the Scaler mainboard in the current batch is used for producing a V-Bye-One screen or matching a Tcon-less screen according to the work order;
when the system is used for producing a V-By-One screen, the PC control host sends a V-By-One screen index number instruction to the Scaler mainboard through a serial port, the Scaler mainboard receives the V-By-One screen index number and stores the V-By-One screen index number into the eMMC, and the V-By-One screen index number is used as a startup initialization calling screen parameter to light the V-By-One interface panel;
when the system is used for producing the Tcon-less screen, the PC control host sends a Tcon-less screen index number instruction to the Scaler mainboard through the serial port, the Scaler mainboard receives the Tcon-less screen index number and stores the Tcon-less screen index number in the eMMC, and the Tcon-less screen index number is used as a startup initialization call 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 for the Scaler mainboard together, 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 controls the host computer By the PC to analyze the data and display the test result of the Scaler mainboard to be tested. The invention adopts a signal detection mode and can be adapted to 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 accompanying drawings and the detailed description;
FIG. 1 is a schematic diagram of a Scaler motherboard architecture adopted by the 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 adapted to a liquid crystal panel according to the present invention;
FIG. 3 is a diagram illustrating a screen index number storage structure and a detection process;
FIG. 4 is a schematic diagram illustrating an index number saving process according to the present invention;
fig. 5 is a schematic diagram of a signal detection module according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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 television Scaler mainboard, before the television or the Scaler mainboard inside the television flows to the market, the performance of the Scaler mainboard of the television needs to be tested, so that the use stability of the television Scaler mainboard is guaranteed.
The existing method for detecting the Scaler mainboard is to detect the appearance of the Scaler mainboard manually, and detect the self-contained interfaces on the Scaler mainboard, such as an audio interface, a USB interface, an HMDI interface, an AV interface, an RF interface and the like. Currently, the required Scaler mainboard test items can be tested item by item only in a manual mode. On one hand, the existing Scaler mainboard detection method cannot cover the detection on the aspect of the performance of the Scaler mainboard, and has the problems of labor consumption, time and labor waste, complex operation, inconvenient recording of a test result and the like. On the other hand, the existing Scaler mainboard detection method detects the Scaler mainboard manually, so that the efficiency is low, manual misjudgment is easy to occur, and certain defects exist in the aspect of accuracy; the correlation between the detection result and the detection level of the detection personnel is large, and the objectivity is poor. Therefore, how to quickly and accurately monitor the quality and the performance of the Scaler mainboard to meet the requirements of the whole liquid crystal television production becomes a problem to be solved.
As shown in fig. 1, the detection Scaler motherboard adopted by 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 mainboard is connected with a signal source, and the output end of the Scaler mainboard is connected with the signal detection module and the output display equipment; the Scaler mainboard outputs the V-By-One signal in a unified manner, as shown in FIG. 5, the signal detection module detects and collects the V-By-One signal output By the Scaler mainboard, decodes the RGB image signal and converts the RGB image signal into a USB interface for output; the PC control host computer analyzes the data and displays the test result of the Scaler mainboard to be tested; and the output display equipment displays the output image of the Scaler mainboard.
Specifically, the Scaler mainboard can be used for a V-By-One screen and a Tcon-less screen, a V-By-One signal is uniformly output during testing, the signal detection module detects and collects V-By-One signal data, and the PC controls the host to analyze the data and display a test result of the Scaler mainboard to be tested.
As shown in fig. 2, the invention discloses a Scaler motherboard detection method adapted to a liquid crystal panel, which comprises the following steps:
step 1, a Boot bootstrap program is started By electrifying a Scaler mainboard, and a preset V-By-One standard screen parameter index is called;
step 2, loading preset V-By-One standard screen parameters By the Scaler mainboard, 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 the signals of the input and output channels of each interface signal of the Scaler mainboard, detecting and collecting the V-By-One signal output By the Scaler mainboard through a signal detection module By the PC control host, and analyzing the accuracy of image data By the PC control host;
step 4, after all the interfaces of the Scaler mainboard are detected, the PC control host sends a serial port screen index number instruction to the Scaler mainboard, the Scaler mainboard receives the serial port instruction,
judging whether the screen is a Tcon-less screen; if so, storing the Tcon-less screen index number to the eMMC, setting the index as a startup screen index, and powering off; otherwise, judging that the screen is a V-By-One screen, storing the V-By-One screen index number into the eMMC, setting the V-By-One screen index number as a power-on screen index, and powering off;
further, as shown in fig. 3, address 1 on EMMC of the Scaler motherboard in step 1 stores the screen index number of Tcon panel, for example: x 003000; address 2 on the EMMC of the Scaler motherboard stores the screen index number of the Tcon-less panel, for example: x 004000.
Powering on and starting up, reading data of an address 1 x003000 for storing a Tcon panel from the EMMC, if the data is 0xFFFF, reading a screen index number of a Tcon-less panel of a storage address 2 x004000, outputting the screen index number as a current Tcon-less screen, and storing the Tcon-less screen index number to factor.db; if the data for address 1 x003000 is not 0xFFFF, the screen index number representing Tcon panel is output as the current Tcon screen.
Further, step 3, the specific steps of the Scaler mainboard detection are as follows:
step 3-1, establishing a test rule configuration table according to functional interface lists of different Scaler mainboards;
3-2, the PC control host sequentially sends a Scaler mainboard interface detection instruction according to a test rule configuration table, the Scaler mainboard receives the instruction and switches to a corresponding signal channel, and the PC control host detects and collects a V-By-One signal output By the Scaler mainboard through a signal detection module and analyzes the accuracy of image data;
and 3-3, displaying the testing result of the Scaler mainboard on the 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 a V-by-one standard screen parameter for displaying an output image before the Scaler motherboard is tested, detects the acquired image signal data through the signal detection module, and then the PC controls the host computer to analyze the image data and display the test result of the Scaler motherboard to be tested. Further, the specific steps of step 4 are as follows:
after the Scaler mainboard is tested, acquiring a work order of production scheduling, and determining whether the Scaler mainboard in the current batch is used for producing a V-Bye-One screen or matching a Tcon-less screen according to the work order;
when the system is used for producing a V-By-One screen, the PC control host sends a V-By-One screen index number instruction to the Scaler mainboard through a serial port, the Scaler mainboard receives the V-By-One screen index number and stores the V-By-One screen index number into the eMMC, and the V-By-One screen index number is used as a startup initialization calling screen parameter to light the V-By-One interface panel;
when the system is used for producing the Tcon-less screen, the PC control host sends a Tcon-less screen index number instruction to the Scaler mainboard through the serial port, the Scaler mainboard receives the Tcon-less screen index number and stores the Tcon-less screen index number in the eMMC, and the Tcon-less screen index number is used as a startup initialization call screen parameter to light the Tcon-less interface panel.
By adopting the technical scheme, the invention solves the following problems: 1, though the Scaler mainboard is provided with interfaces of a V-By-One screen and a Tcon-less screen, the test of the Scaler mainboard needs different interface test tools of the V-By-One screen and the Tcon-less screen respectively; 2. the problem that various Scaler mainboard signal testing tools are needed due to the fact that the driving principle of screens of different manufacturers is different greatly or the driving principle of screens of the same manufacturer in different sizes is different; 3, each input interface and each output processing loop of the Scaler mainboard can be configured for testing, so that reliability is provided; meanwhile, an automatic testing method is adopted, so that the testing efficiency is improved.
The invention can automatically test the Scaler mainboard and automatically output the test result, is mainly used for detecting various Scaler mainboards and ports on the Scaler mainboards, has better detection effect, lower production cost and simple and convenient use.
It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can 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 claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (4)
1. A method for detecting a Scaler mainboard adaptive to a liquid crystal panel is characterized in that the adopted detection Scaler mainboard comprises a Scaler mainboard, a PC control host, a signal detection module and an output display device; the Scaler mainboard is connected with a signal source, and the output end of the Scaler mainboard is connected with the signal detection module and the output display equipment; the Scaler mainboard uniformly outputs a V-By-One signal, the signal detection module detects and collects the V-By-One signal output By the Scaler mainboard, decodes an RGB image signal and converts the RGB image signal into a USB interface for output; the PC control host computer analyzes the data and displays the test result of the Scaler mainboard to be tested; the output display equipment displays an output image of the Scaler mainboard; the method is characterized in that: the Scaler mainboard detection method comprises the following steps:
step 1, a Boot bootstrap program is started By electrifying a Scaler mainboard, and a preset V-By-One standard screen parameter index is called;
step 2, loading preset V-By-One standard screen parameters By the Scaler mainboard, 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 the signals of the input and output channels of each interface signal of the Scaler mainboard, detecting and collecting the V-By-One signal output By the Scaler mainboard through a signal detection module By the PC control host, and analyzing the accuracy of image data By the PC control host;
step 4, after all the interfaces of the Scaler mainboard are detected, the PC control host sends a serial port screen index number instruction to the Scaler mainboard; and the Scaler mainboard receives the serial port instruction, stores the corresponding screen index number, sets the screen index number as a startup screen index and then shuts down the screen.
2. The method for detecting the Scaler board adapted to the liquid crystal panel according to claim 1, wherein the method comprises the following steps: in the step 1, an address 1 on the EMMC of the Scaler mainboard stores a screen index number of a Tcon panel, and an address 2 on the EMMC of the Scaler mainboard stores a screen index number of a Tcon-less panel; the specific calling steps are as follows:
step 1-1, power-on and start-up, reading data of address 1 for storing Tcon panel from EMMC,
step 1-2, judging whether the data on the address 1 is 0 xFFFF; if yes, executing the step 1-3; otherwise, the data of the address 1 is not 0xFFFF, which means that the data is the screen index number of the Tcon panel, reading the data to be output as the current Tcon screen, and finishing the screen index number calling;
and 1-3, reading the screen index number of the Tcon-less panel of the storage address 2, outputting the screen index number as the current Tcon-less screen, and storing the screen index number to factory.
3. The method for detecting the Scaler board adapted to the liquid crystal panel according to claim 1, wherein the method comprises the following steps: step 3, the specific steps of the Scaler mainboard detection are as follows:
step 3-1, establishing a test rule configuration table according to functional interface lists of different Scaler mainboards;
3-2, the PC control host sequentially sends a Scaler mainboard interface detection instruction according to a test rule configuration table, the Scaler mainboard receives the instruction and switches to a corresponding signal channel, and the PC control host detects and collects a V-By-One signal output By the Scaler mainboard through a signal detection module and analyzes the accuracy of image data;
and 3-3, displaying the testing result of the Scaler mainboard on the testing interface of the PC control host, and generating a testing result record.
4. The method for detecting the Scaler board adapted to the liquid crystal panel according to claim 1, wherein the method comprises the following steps: the specific steps of step 4 are as follows:
after the Scaler mainboard is tested, acquiring a work order of production scheduling, and determining whether the Scaler mainboard in the current batch is used for producing a V-Bye-One screen or matching a Tcon-less screen according to the work order;
when the system is used for producing a V-By-One screen, the PC control host sends a V-By-One screen index number instruction to the Scaler mainboard through a serial port, the Scaler mainboard receives the V-By-One screen index number and stores the V-By-One screen index number into the eMMC, and the V-By-One screen index number is used as a startup initialization calling screen parameter to light the V-By-One interface panel;
when the system is used for producing the Tcon-less screen, the PC control host sends a Tcon-less screen index number instruction to the Scaler mainboard through the serial port, the Scaler mainboard receives the Tcon-less screen index number and stores the Tcon-less screen index number in the eMMC, and the Tcon-less screen index number is used as a startup initialization call screen parameter to light the Tcon-less interface panel.
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