CN106341629B - Automatic correction system and method for ADC (analog to digital converter) of LCD (liquid crystal display television) main board - Google Patents
Automatic correction system and method for ADC (analog to digital converter) of LCD (liquid crystal display television) main board Download PDFInfo
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- CN106341629B CN106341629B CN201610674314.9A CN201610674314A CN106341629B CN 106341629 B CN106341629 B CN 106341629B CN 201610674314 A CN201610674314 A CN 201610674314A CN 106341629 B CN106341629 B CN 106341629B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
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- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The invention discloses an automatic correction system for an ADC (analog-to-digital converter) of a main board of a liquid crystal display television, which comprises an upper computer, the main board of the liquid crystal display television, a signal generator, a mechanical arm, a thimble tool and a power supply system; the thimble tool is fixedly arranged on the mechanical arm, the upper computer is connected with the mechanical arm and used for controlling the mechanical arm to rise or push down, and the thimble tool is connected with the main board of the liquid crystal television when the mechanical arm pushes down; the upper computer is connected with the thimble tool through a serial port and used for controlling the LCD TV main board to carry out ADC correction; the power supply system is connected with the thimble tool and used for providing power supply for ADC correction; the signal generator is connected with the thimble tool and used for providing a signal source for ADC correction. According to the invention, the upper computer controls the lifting and the pressing of the thimble tool on the mechanical arm, and provides power, YBPR signals, VGA signals and serial communication for the main board of the liquid crystal television through the thimble tool, so that manual wiring is not needed, and the production efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of televisions, in particular to an automatic correction system and method for an ADC (analog to digital converter) of a main board of a liquid crystal display television.
Background
With the improvement of the living standard of people, the liquid crystal television becomes an indispensable electronic consumer product in the life of people. In the production process of the liquid crystal display television, two analog signal channels of the YBPR and the VGA need to be corrected by the ADC, and the ADC is always corrected by adopting a manual correction mode, so that the speed is low, a large amount of manpower is required to be input, and the production efficiency is seriously restricted.
At present, the ADC calibration steps of the television on the production line are as follows:
s1, entering a YBPR channel;
s2, switching the meter to 480p format: correcting the SD progressive signal;
s3, entering a factory mode or correcting through a factory remote controller;
s4, switching the instrument to 1080p format: correcting the HD progressive signal;
s5, entering a factory mode or correcting through a factory remote controller;
s6, switching to the VGA channel, and repeating the steps S2-S5.
The existing ADC correction steps are complicated, and a power line, a VGA signal line, a YBPR signal line, a liquid crystal screen line, a remote control and a key board connecting line are also required to be manually inserted. In addition, the main board of the liquid crystal display television needs to be manually replaced, various signal wires need to be reinserted after replacement, the speed is low, errors are easy to occur, and the production efficiency is severely limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an automatic correction system and method for an ADC (analog-to-digital converter) of a main board of a liquid crystal television, wherein an upper computer controls the lifting and the pressing of a thimble tool on a mechanical arm, and provides power, YBPR (YPSPR) signals, VGA (video graphics array) signals and serial port communication for the main board of the liquid crystal television through the thimble tool, so that manual wiring is not needed, and the production efficiency is greatly improved.
The technical scheme adopted for solving the technical problems is as follows:
an automatic correction system for an ADC (analog to digital converter) of a main board of a liquid crystal display television comprises an upper computer, the main board of the liquid crystal display television, a signal generator, a mechanical arm, a thimble tool and a power supply system; the thimble tool is fixedly arranged on the mechanical arm, the upper computer is connected with the mechanical arm and used for controlling the mechanical arm to rise or press down, and the thimble tool is connected with the main board of the liquid crystal television when the mechanical arm presses down; the upper computer is connected with the thimble tool through a serial port and used for controlling the LCD TV mainboard to carry out ADC correction; the power supply system is connected with the thimble tool and used for providing power supply for ADC correction; the signal generator is connected with the thimble tool and used for providing a signal source for ADC correction.
Preferably, the main board of the liquid crystal television comprises a plurality of preset test points; the thimble tool comprises a plurality of signal thimbles; and when the mechanical arm is pressed down, the signal thimble is connected with the preset test point.
Preferably, the main board of the liquid crystal television further comprises a plurality of positioning holes; the thimble tool also comprises a plurality of positioning thimbles; and when the mechanical arm is pressed down, the positioning thimble is inserted into the positioning hole.
Preferably, the signal thimble comprises a power supply needle, a YBPR signal needle, a VGA signal needle and a serial port signal needle; the preset test point comprises a power interface connected with the power pin, a YBPR interface connected with the YBPR signal pin, a VGA interface connected with the VGA signal pin and a serial port connected with the serial port signal pin.
Preferably, the signal generator includes a YPBPR signal source generator for providing a YPBPR signal and a VGA signal source generator for providing a VGA signal.
Preferably, the power supply needle, the YBPR signal needle, the VGA signal needle and the serial port signal needle are respectively connected with the power supply system, the YBPR signal source generator, the VGA signal source generator and the upper computer through standard signal wires.
Preferably, an auxiliary positioner for assisting the positioning thimble in accurately positioning is fixed on the positioning hole.
An automatic correction method for an ADC (analog to digital converter) of a liquid crystal display television main board based on the automatic correction system for the ADC of the liquid crystal display television main board comprises the following steps:
after the upper computer monitors that the main board of the liquid crystal television reaches a correction station, the mechanical arm is controlled to be pressed down;
the thimble tool fixedly arranged on the mechanical arm is positioned through the positioning thimble, and the signal thimble is normally connected with the main board of the liquid crystal television;
the power supply system supplies power to the main board of the liquid crystal television through the thimble tool, the main board of the liquid crystal television is automatically started and initialized after being electrified, and a ready instruction is sent to the upper computer through the serial port after the initialization is completed;
the upper computer receives the ready instruction and sends a command to control the LCD TV main board to correct the ADC through the serial port;
the main board of the liquid crystal television sends a correction success instruction to an upper computer;
the upper computer controls the mechanical arm to lift and monitors whether the main board of the liquid crystal display television to be corrected reaches the correction station.
Preferably, the host computer sends a command to control the liquid crystal television main board to correct the ADC through the serial port, including:
sending a command for switching to the YBPR channel;
receiving a switching success instruction;
transmitting an instruction for detecting YBPR channel signals;
receiving a signal normal instruction;
transmitting a corrected YPBPR channel ADC command;
receiving a correction success instruction;
transmitting a command for switching to the VGA channel;
receiving a switching success instruction;
transmitting a VGA channel signal detection instruction;
receiving a signal normal instruction;
transmitting a VGA channel correcting ADC instruction;
a correction success instruction is received.
Preferably, when the liquid crystal television main board receives an instruction of switching to a YBPR channel, the channel is switched to the YBPR, and the YBPR signal source generator outputs a YBPR signal; when the LCD TV main board receives the instruction of switching to VGA channel, the channel is switched to VGA, and the VGA signal source generator outputs VGA signals.
The technical scheme provided by the invention has the beneficial effects that:
1. the power, video signals and serial communication needed by the LCD TV main board are all provided through the thimble tool, manual wiring is not needed, labor cost is saved, and production efficiency is greatly improved.
2. The LCD TV mainboard is controlled to correct the ADC through the upper computer software, manual operation is not needed, labor cost is saved, and production efficiency is greatly improved.
3. Through the cooperation of arm and assembly line conveyer belt, need not the manual work and trade the board, practice thrift the human cost, improve production efficiency greatly.
4. Full-automatic production, the whole process can be unattended, and labor cost is saved.
The present invention is further described in detail below with reference to the drawings and embodiments, but the system and method for auto-calibrating an ADC of a motherboard of a liquid crystal display television of the present invention are not limited to the embodiments.
Drawings
Fig. 1 is an overall block diagram of an ADC auto-calibration system for a main board of a lcd tv according to the present embodiment;
fig. 2 is a schematic diagram of a thimble of the automatic correction system of the ADC of the lcd tv motherboard according to the present embodiment;
fig. 3 is a flowchart of an automatic correction method for an ADC of a main board of a liquid crystal display television according to the embodiment;
fig. 4 is an interaction diagram of the host computer and the lcd-tv motherboard according to the embodiment;
fig. 5 is a control flow chart of the upper computer according to the embodiment;
fig. 6 is a control flow chart of the lcd-tv motherboard according to the present embodiment.
Detailed Description
Referring to fig. 1, an automatic correction system for an ADC of a main board of a lcd tv includes an upper computer 10, a main board 11 of the lcd tv, a signal generator, a mechanical arm 15, a thimble tool 16, and a power supply system 14; the thimble tool 16 is fixedly arranged on the mechanical arm 15, the upper computer 10 is connected with the mechanical arm 15 and used for controlling the mechanical arm 15 to rise or press down, and the thimble tool 16 is connected with the liquid crystal television main board 11 when the mechanical arm 15 presses down; the upper computer 10 is connected with the thimble tool 16 through a serial port and used for controlling the LCD TV main board 11 to carry out ADC correction; the power supply system 14 is connected with the thimble tool 16 and used for providing power for ADC correction; the signal generator is connected with the thimble tooling 16 for providing a signal source for ADC correction.
Specifically, as shown in fig. 2, the lcd-tv main board 11 includes a plurality of preset test points 110; the thimble tooling 16 comprises a plurality of signal thimbles 160; the signal thimble 160 is connected to the preset test point 110 when the mechanical arm 15 is pressed down.
Specifically, the lcd-tv main board 11 further includes a plurality of positioning holes 111; the thimble tooling 16 further comprises a plurality of positioning thimbles 161; the positioning thimble 161 is inserted into the positioning hole 111 when the mechanical arm presses 15.
Preferably, the signal thimble 160 includes a power pin, a YPBPR signal pin, a VGA signal pin, and a serial port signal pin; the preset test point 110 includes a power interface connected to the power pin, a YPBPR interface connected to the YPBPR signal pin, a VGA interface connected to the VGA signal pin, and a serial port connected to the serial port signal pin.
Preferably, the signal generator includes a YPBPR signal source generator 12 for providing a YPBPR signal and a VGA signal source generator 13 for providing a VGA signal.
Preferably, the power supply needle, the YBPR signal needle, the VGA signal needle and the serial port signal needle are respectively connected with the power supply system, the YBPR signal source generator, the VGA signal source generator and the upper computer through standard signal wires.
Preferably, an auxiliary positioner 112 for assisting the positioning thimble 161 to accurately position is fixed on the positioning hole 111.
As shown in fig. 3, a method for automatically correcting an ADC of a main board of a liquid crystal television, based on the system for automatically correcting the ADC of the main board of the liquid crystal television, includes:
step 301, after an upper computer monitors that a main board of the liquid crystal television reaches a correction station, controlling a mechanical arm to be pressed down;
specifically, after the upper computer monitors that the main board of the liquid crystal television reaches the correction station, the assembly line conveyor belt stops running, and the upper computer controls the mechanical arm to press down.
Step 302, positioning a thimble tool fixedly arranged on a mechanical arm through a positioning thimble, wherein a signal thimble is normally connected with a main board of the liquid crystal television;
step 303, the power supply system supplies power to the main board of the liquid crystal television through the thimble tool, the main board of the liquid crystal television is automatically started and initialized after being electrified, and a ready instruction is sent to the upper computer through the serial port after the initialization is completed;
specifically, after the signal thimble is normally connected with the main board of the liquid crystal television, the power supply system supplies power to the main board of the liquid crystal television through the thimble tool, the main board of the liquid crystal television is automatically started after being electrified, and a 'ready' instruction is sent to the upper computer through the serial port after initialization is finished.
Step 304, the upper computer receives the ready instruction and sends a command to control the LCD TV main board to correct the ADC through the serial port;
step 305, the main board of the liquid crystal television sends a correction success instruction to the upper computer;
and 306, the upper computer controls the mechanical arm to lift and monitors whether the main board of the liquid crystal display television to be corrected reaches the correction station.
Specifically, as shown in fig. 4, the method for controlling the correction ADC of the lcd tv motherboard by the upper computer through the serial port sending command includes:
sending a command for switching to the YBPR channel;
receiving a switching success instruction;
transmitting an instruction for detecting YBPR channel signals;
receiving a signal normal instruction;
transmitting a corrected YPBPR channel ADC command;
receiving a correction success instruction;
transmitting a command for switching to the VGA channel;
receiving a switching success instruction;
transmitting a VGA channel signal detection instruction;
receiving a signal normal instruction;
transmitting a VGA channel correcting ADC instruction;
a correction success instruction is received.
Further, the control flows of the host computer and the main board of the liquid crystal television will be described in detail below.
As shown in fig. 5, which is a control flow chart of the upper computer, the upper computer communicates with the main board of the lcd tv through a serial port, and the specific steps are as follows:
step 501, initializing upper computer software;
step 502, after initialization is completed, controlling the mechanical arm to be pressed down;
step 503, waiting for a "ready" instruction sent by the lcd tv motherboard; judging whether the waiting time is overtime, if not, continuing waiting, and if the overtime shows that the waiting time is overtime, failing to correct the ADC;
step 504, receiving a "ready" instruction, sending a channel switching instruction of a main board of the liquid crystal display television, and receiving a switching success instruction;
step 505, a signal instruction of a detection channel of the main board of the liquid crystal television is sent, and a signal normal instruction sent by the main board of the liquid crystal television is waited; judging whether the waiting time is overtime, if not, continuing waiting, and displaying the overtime, wherein the overtime is displayed and the ADC correction fails;
step 506, a correction ADC instruction of the main board of the liquid crystal display television is sent, and a correction result is received; the correction is successful in step 507, otherwise the correction is re-performed;
in step 507, the mechanical arm is controlled to lift.
In the above step, the channel switching instruction includes an instruction to switch to the YPBPR channel and the VGA channel; detecting the channel signal instruction comprises detecting the YBPR channel signal instruction and detecting the YBPR channel and the VGA channel signal instruction; the correct channel ADC instructions include correct YPBPR channel and VGA channel ADC instructions. Specifically, the correction of the YPBPR channel is completed first, and then the correction of the VGA channel is completed.
As shown in fig. 6, which is a control flow chart of the main board of the lcd tv, the main board of the lcd tv communicates with the host computer through a serial port, and when the mechanical arm is pressed down, the main board of the lcd tv is powered on, and then is started and initialized. After the initialization is finished, informing the upper computer of readiness, waiting for a command of the upper computer, switching channels according to the received command, detecting signals, correcting ADC and other actions, and returning a result to the upper computer.
Further, when the LCD TV main board receives an instruction of switching to the YBPR channel, the channel is switched to the YBPR, and the YBPR signal source generator outputs a YBPR signal; when the LCD TV main board receives the instruction of switching to VGA channel, the channel is switched to VGA, and the VGA signal source generator outputs VGA signals.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The utility model provides a LCD TV mainboard ADC automatic correction system, includes host computer, LCD TV mainboard and signal generator, its characterized in that still includes: the device comprises a mechanical arm, a thimble tool and a power supply system; the thimble tool is fixedly arranged on the mechanical arm, the upper computer is connected with the mechanical arm and used for controlling the mechanical arm to rise or press down, and the thimble tool is connected with the main board of the liquid crystal television when the mechanical arm presses down; the upper computer is connected with the thimble tool through a serial port and used for controlling the LCD TV mainboard to carry out ADC correction; the power supply system is connected with the thimble tool and used for providing power supply for ADC correction; the signal generator is connected with the thimble tool and used for providing a signal source for ADC correction;
the liquid crystal television main board also comprises a plurality of positioning holes; the thimble tool also comprises a plurality of positioning thimbles; the positioning thimble is inserted into the positioning hole when the mechanical arm is pressed down; an auxiliary positioner for assisting the positioning thimble to accurately position is fixed on the positioning hole;
the method for automatically correcting the ADC of the main board of the liquid crystal display television by using the automatic correction system of the ADC of the main board of the liquid crystal display television comprises the following steps:
after the upper computer monitors that the main board of the liquid crystal television reaches a correction station, the mechanical arm is controlled to be pressed down;
the thimble tool fixedly arranged on the mechanical arm is positioned through the positioning thimble, and the signal thimble is normally connected with the main board of the liquid crystal television;
the power supply system supplies power to the main board of the liquid crystal television through the thimble tool, the main board of the liquid crystal television is automatically started and initialized after being electrified, and a ready instruction is sent to the upper computer through the serial port after the initialization is completed;
the upper computer receives the ready instruction and sends a command to control the LCD TV main board to correct the ADC through the serial port;
the main board of the liquid crystal television sends a correction success instruction to an upper computer;
the upper computer controls the mechanical arm to lift and monitors whether the main board of the liquid crystal display television to be corrected reaches the correction station.
2. The lcd tv motherboard ADC auto-calibration system according to claim 1, wherein:
the liquid crystal television main board comprises a plurality of preset test points; the thimble tool comprises a plurality of signal thimbles; and when the mechanical arm is pressed down, the signal thimble is connected with the preset test point.
3. The lcd tv motherboard ADC auto-calibration system according to claim 2, wherein:
the signal thimble comprises a power supply needle, a YBPR signal needle, a VGA signal needle and a serial port signal needle; the preset test point comprises a power interface connected with the power pin, a YBPR interface connected with the YBPR signal pin, a VGA interface connected with the VGA signal pin and a serial port connected with the serial port signal pin.
4. The lcd tv motherboard ADC auto-calibration system according to claim 3, wherein:
the signal generator includes a YBPR signal source generator for providing a YBPR signal and a VGA signal source generator for providing a VGA signal.
5. The lcd tv motherboard ADC auto-calibration system according to claim 4, wherein:
the power supply needle, the YBPR signal needle, the VGA signal needle and the serial port signal needle are respectively connected with the power supply system, the YBPR signal source generator, the VGA signal source generator and the upper computer through standard signal wires.
6. A method for automatically correcting an ADC of a main board of a liquid crystal display television, wherein the method comprises:
after the upper computer monitors that the main board of the liquid crystal television reaches a correction station, the mechanical arm is controlled to be pressed down;
the thimble tool fixedly arranged on the mechanical arm is positioned through the positioning thimble, and the signal thimble is normally connected with the main board of the liquid crystal television;
the power supply system supplies power to the main board of the liquid crystal television through the thimble tool, the main board of the liquid crystal television is automatically started and initialized after being electrified, and a ready instruction is sent to the upper computer through the serial port after the initialization is completed;
the upper computer receives the ready instruction and sends a command to control the LCD TV main board to correct the ADC through the serial port;
the main board of the liquid crystal television sends a correction success instruction to an upper computer;
the upper computer controls the mechanical arm to lift and monitors whether the main board of the liquid crystal display television to be corrected reaches the correction station.
7. The method for automatically calibrating an ADC of a main board of a lcd-tv according to claim 6, wherein the host computer transmitting the command to control the ADC of the main board of the lcd-tv through the serial port comprises:
sending a command for switching to the YBPR channel;
receiving a switching success instruction;
transmitting an instruction for detecting YBPR channel signals;
receiving a signal normal instruction;
transmitting a corrected YPBPR channel ADC command;
receiving a correction success instruction;
transmitting a command for switching to the VGA channel;
receiving a switching success instruction;
transmitting a VGA channel signal detection instruction;
receiving a signal normal instruction;
transmitting a VGA channel correcting ADC instruction;
a correction success instruction is received.
8. The method for automatically correcting the ADC of a main board of a liquid crystal display television according to claim 7, wherein: when the LCD TV main board receives an instruction of switching to a YBPR channel, switching the channel to the YBPR, and outputting a YBPR signal by a YBPR signal source generator; when the LCD TV main board receives the instruction of switching to VGA channel, the channel is switched to VGA, and the VGA signal source generator outputs VGA signals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610674314.9A CN106341629B (en) | 2016-08-16 | 2016-08-16 | Automatic correction system and method for ADC (analog to digital converter) of LCD (liquid crystal display television) main board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610674314.9A CN106341629B (en) | 2016-08-16 | 2016-08-16 | Automatic correction system and method for ADC (analog to digital converter) of LCD (liquid crystal display television) main board |
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| CN106341629A CN106341629A (en) | 2017-01-18 |
| CN106341629B true CN106341629B (en) | 2023-10-20 |
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