CN110459154A - A kind of display screen interface signal conversion circuit, device and method - Google Patents
A kind of display screen interface signal conversion circuit, device and method Download PDFInfo
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- CN110459154A CN110459154A CN201910703330.XA CN201910703330A CN110459154A CN 110459154 A CN110459154 A CN 110459154A CN 201910703330 A CN201910703330 A CN 201910703330A CN 110459154 A CN110459154 A CN 110459154A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- 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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G3/2096—Details of the interface to the display terminal specific for a flat panel
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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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- Crystallography & Structural Chemistry (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention discloses a kind of display screen interface signal conversion circuits, device and method, wherein, display screen interface signal conversion circuit is connect with TV motherboard and screen driving plate (TCON), including sequentially connected EPI module, V-by-one module and control module；When debugging or repairing TV, 8 groups of V-by-one differential signals are sent from TV motherboard to the EPI module, power supply and control signal are reached V-by-one module and rearranged and form V-by-one standard signal by 8 groups of V-by-one differential signals, the control module by the EPI module, V-by-one standard signal is reached into screen driving plate (TCON) by V-by-one module, drives V-by-one screen to show V-by-one standard signal to confirm whether TV motherboard is normal by screen driving plate.The present invention passes through one display screen interface signal conversion circuit of setting, it is accessed in TV scheduling and planning or maintenance, V-by-one standard signal is converted by the Tconless screen signal of different size, so that TV motherboard can be used general V-by-one screen and test to TV motherboard can be realized.
Description
Technical field
The present invention relates to LCD TV field, in particular to a kind of display screen interface signal conversion circuit, device and side
Method.
Background technique
V-by-One is the Digital Interface Standard specially developed towards image transmitting, and the input and output level of signal uses
LVDS (low-voltage differential signal), the signal frequency of board are about 1GHz, compared with CMOS/TTL mode before this, can will be transmitted
The quantity of line is reduced to about 1/10 before this, and the V-by-One signal of board is typically all the dedicated TCON letter for passing through display screen
Number processing board is connected with display screen.
The Tconless screen that current display screen manufacturer develops various forms of interfaces in order to reduce production cost (saves
Fall the TCON signal-processing board of band on original screen, the external direct output signal of mainboard directly drives screen work), such as LG company
EPI interface, 8 groups of pairing differential signals of V-by-One can be compatible on circuit, increase to 12 groups of differential signals, and are increased
The screens such as CLK, GAM, VCOM, VGL, VGH, VDD, HVDD, Vcore, VST, VGH-EVEN, VGH-ODD control signal, eliminate
TCON plate on screen originally, directly drives control display screen.
But the Tconless screen control signal for being different producer is different, when actually generating debugging or maintenance, no
Tconless screen with producer must match corresponding TV motherboard；When caused in this way to TV motherboard scheduling and planning or maintenance,
Corresponding screen must be replaced to adapt to according to the mainboard product of different model, reduce efficiency when scheduling and planning and maintenance, and
Increase cost.
Thus the prior art could be improved and improve.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of display screen interface signals to turn
Circuit, device and method are changed, by the way that a display screen interface signal conversion circuit is arranged, is connect in TV scheduling and planning or maintenance
Enter, convert V-by-one standard signal for the Tconless screen signal of different size so that TV motherboard can be used it is general
V-by-one screen the test to TV motherboard can be realized.
In order to achieve the above object, this invention takes following technical schemes:
A kind of display screen interface signal conversion circuit is connect with TV motherboard and screen driving plate (TCON), including successively
EPI module, V-by-one module and the control module of connection；When debugging or repairing TV, from TV motherboard to the EPI mould
Block sends 8 groups of V-by-one differential signals, by the EPI module by 8 groups of V-by-one differential signals, the control module
Power supply and control signal are reached V-by-one module and rearrange to form V-by-one standard signal, it will by V-by-one module
V-by-one standard signal reaches screen driving plate (TCON), drives V-by-one screen to show V-by-one mark by screen driving plate
Calibration signal is to confirm whether TV motherboard is normal.
In the embodiment of the present invention, by the way that a display screen interface signal conversion circuit is arranged, in TV scheduling and planning or dimension
Access when repairing converts V-by-one standard signal for the Tconless screen signal of different size, TV motherboard is made
The test to TV can be realized with general V-by-one screen.
The control module includes power supply unit and control unit, and said supply unit is V-by-one module for power supply, institute
It states control unit and sends control signal to V-by-one module to control the normal output of V-by-one standard signal.
The EPI module includes the first EPI interface and the 2nd EPI interface, the first EPI interface and the 2nd EPI interface
8 groups of V-by-one differential signals that TV motherboard issues are received respectively, then 8 groups of V-by-one differential signals are reached into V- respectively
By-one module.
The V-by-one module includes sequentially connected AC coupled unit and V-by-one interface, the first EPI
What the 8 groups of V-by-one differential signals and said supply unit and control unit transmitted in interface and the 2nd EPI interface transmitted
Power supply and control signal, which are arranged by Standard Order and reach AC coupled unit, carries out AC coupled, is then passed to V-by-one and connects
Mouthful formed V-by-one standard signal, by V-by-one interface by V-by-one standard signal be sent to screen driving plate (TCON) with
Drive display image screen.
The AC coupled unit includes first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor,
Six capacitors, the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor, the 12nd capacitor, the 13rd capacitor,
14th capacitor, the 15th capacitor and the 16th capacitor；The first capacitor, the second capacitor, third capacitor, the 4th capacitor,
Five capacitors, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor, the 12nd capacitor,
13 capacitors, the 14th capacitor, the 15th capacitor and the 16th capacitor one end connect respectively with the first EPI interface and the 2nd EPI
Mouthful connection, the first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor, the
Eight capacitors, the 9th capacitor, the tenth capacitor, the 11st capacitor, the 12nd capacitor, the 13rd capacitor, the 14th capacitor, the 15th electricity
Hold and the other end of the 16th capacitor is connect with the V-by-one interface respectively.
Described control unit includes first resistor, second resistance and signal output interface, and the of the signal output interface
One end of two feet and first resistor and V-by-one interface connect, and the one of the third foot of the signal output interface and second resistance
End and the connection of V-by-one interface, the other end interconnection of the first resistor and second resistance and with power supply unit and V-by-one
Interface connection.
The V-by-one module further includes signal input unit, and the signal input unit includes 3rd resistor, the 4th
The crus secunda of resistance, the 5th resistance and the 6th resistance, one end of the 3rd resistor and the signal output interface and the first electricity
One end of resistance connects, one end company of one end of the 4th resistance and the third foot of the signal output interface and second resistance
It connects, one end ground connection of the 5th resistance, a termination first resistor of the 6th resistance, the other end of second resistance and confession
Electric unit, the other end of the 3rd resistor, the 4th resistance and the 5th resistance respectively with the 26th foot of V-by-one interface,
25th foot and the connection of the 24th foot, one end of the 6th resistance and the other end and the 24th of the 5th resistance
Foot connection.
A kind of display screen interface signal conversion device, including as above described in any item display screen interface signal conversions
Circuit.
A kind of display screen interface signal conversion method, includes the following steps:
Display screen interface signal is connected between the TV motherboard and screen driving plate for the television set for needing to debug or repair
Conversion circuit；
It after booting, is issued and is instructed by IR remote controller, after the chip of TV motherboard receives instruction, program is by TV motherboard
The EPI signal exported on chip is converted to 8 groups of V-by-one differential signals, and exports to EPI module；
V-by-one signal, power supply and control signal are rearranged respectively by EPI module and control module and reach V-
By-one module is rearranged into V-by-one standard signal；
The V-by-one standard signal rearranged is exported to screen driving plate (TCON) by the V-by-one module
V-by-one standard signal is shown, to confirm whether mainboard is normal.
It is described to be rearranged V-by-one signal, power supply and control signal by EPI module and control module, and reach V-
The step of by-one interface further include:
The signal that mainboard transmits is rearranged respectively to coupling unit by the first EPI interface and the 2nd EPI interface and is carried out
AC coupled, then reach V-by-one interface；
Power supply and control signal are reached respectively by V-by-one interface by power supply unit and control unit.
Compared to the prior art, display screen interface signal conversion circuit provided by the invention, in device and method, it is described
Display screen interface signal conversion circuit is connect with TV motherboard and screen driving plate (TCON), which is characterized in that including successively connecting
EPI module, control module and the V-by-one module connect；When debugging or repairing TV, by TV motherboard chip in booting,
Remote command is received, 8 groups of V-by-one differential signals will be sent to the EPI module, by the EPI module by described 8
Power supply and control signal are reached V-by-one module and rearrange and formed by group V-by-one differential signal, the control module
V-by-one standard signal is reached screen driving plate (TCON) by V-by-one module, is driven by screen by V-by-one standard signal
Movable plate drives V-by-one screen to show V-by-one standard signal to confirm whether TV motherboard is normal.
The present invention is accessed by one display screen interface signal conversion circuit of setting in TV scheduling and planning or maintenance,
V-by-one standard signal is converted by the Tconless screen signal of different size, so that general V- can be used in TV motherboard
The test to TV can be realized in by-one screen.
Detailed description of the invention
Fig. 1 is the structural block diagram of display screen interface signal conversion circuit provided by the invention；
Fig. 2 is the circuit diagram of the first part of power supply unit provided by the invention；
Fig. 3 is the circuit diagram of the second part of power supply unit provided by the invention；
Fig. 4 is the circuit diagram of control unit provided by the invention；
Fig. 5 is the circuit diagram of the first EPI interface provided by the invention；
Fig. 6 is the circuit diagram of the 2nd EPI interface provided by the invention；
Fig. 7 is the circuit diagram of AC coupled unit provided by the invention；
Fig. 8 is the circuit diagram of V-by-one interface provided by the invention and signal input unit.
Specific embodiment
In view of problems of the prior art, a kind of display screen interface signal conversion circuit, dress are provided in the present invention
It sets and method is accessed by the way that a display screen interface signal conversion circuit is arranged in TV scheduling and planning or maintenance, it will be different
The Tconless screen signal of specification is converted into V-by-one standard signal, so that general V-by-one can be used in TV motherboard
The test to TV can be realized in screen.
A specific embodiment of the invention be for the ease of to technical concept of the invention, it is solved the technical issues of, structure
More detailed description is done at the technical characteristic and bring technical effect of technical solution.It should be noted that for these realities
The explanation for applying mode does not restrict the protection scope of the present invention.In addition, institute in following described embodiments
As long as the technical characteristic being related to does not constitute conflict each other and can be combined with each other.
Referring to Fig. 1, the present invention provides a kind of display screen interface signal conversion circuit, driven with TV motherboard 100 and screen
Movable plate 500 (TCON) connection, including sequentially connected EPI module 200, V-by-one module 300 and control module 400；It is adjusting
When examination or maintenance TV, 8 groups of V-by-one differential signals are sent from TV motherboard 100 to the EPI module 200, by the EPI
Power supply and control signal are reached V-by-one by the V-by-one8 group differential signal, the control module 400 by module 200
Module 300 forms V-by-one standard signal, and V-by-one standard signal is reached screen driving plate by V-by-one module 300
500 (TCON) drive V-by-one screen 600 to show V-by-one standard signal to confirm TV master by screen driving plate 500
Whether plate 100 is normal.The present invention is by one display screen interface signal conversion circuit of setting, in TV scheduling and planning or maintenance
Access converts V-by-one standard signal for the signal that the Tconless screen of different size exports, so that TV motherboard 100 can
To use general V-by-one screen 600 that the test to TV can be realized.
When it is implemented, in the embodiment of the present invention, when carrying out scheduling and planning or maintenance to LCD TV, by display screen
Interface signal conversion circuit accesses between TV motherboard 100 and screen driving plate 500 (TCON), the EPI module 200 and the electricity
It is connected depending on mainboard 100, the V-by-one module 300 is connect with screen driving plate 500 (TCON)；At this point, the TV motherboard 100
8 groups of V-by-one differential signals are exported to EPI module 200, meanwhile, TV motherboard 100 powers to control module 400 and sends control
Signal processed；By EPI module 200 by 8 groups of V-by-one differential signals, control module 400 reaches power supply and control signal together
V-by-one module 300 forms V-by-one standard signal in V-by-one module 300, and exports to screen driving plate 500
(TCON), make to shield driving plate 500 (TCON) driving screen display V-by-one standard signal, if can show, TV motherboard
100 is normal, if cannot show, TV motherboard 100 is damaged.
Please see Fig. 2 to Fig. 4, in the embodiment of the present invention, the control module 400 includes power supply unit (unlabeled in figure)
With control unit (in figure unlabeled), said supply unit is that V-by-one module 300 is powered, and described control unit is to V-by-
One module 300 sends control signal and power supply signal to form the normal output of V-by-one standard signal.
When it is implemented, the control module 400 receives the 12V electricity that TV motherboard 100 transmits in the embodiment of the present invention
Pressure, by power supply unit by the 12V voltage, directly supplies electricity to V-by-one module all the way, is converted into 3.3V low pressure and defeated all the way
Out to control unit and V-by-one module 300, power for V-by-one module 300；Described control unit receives TV motherboard
The 100 control signal HTPDN (calling HTPDN signal in the following text) transmitted and control signal LOCKN (calling LOCKN signal in the following text), and reach V-
By-one module 300 is normally exported with the V-by-one standard signal formed in V-by-one module 300.
Further, please continue to refer to Fig. 2 and Fig. 3, Fig. 4, Fig. 8 said supply unit are divided into two parts, and first (Fig. 1)
It is divided into 12V power input and output par, c, accesses 12V voltage from TV motherboard 100 and exports to second part, and to V-by-
1 foot of one interface XS3 to 8 feet are powered；Second part (Fig. 2) is to convert 3.3V low-pressure section for 12V voltage, from first
It is tapped into 12V voltage and is converted into 3.3V low pressure and export to control unit and V-by-one module 300.
Specifically, the first part includes the 17th capacitor C17, the 18th capacitor C18, the 19th capacitor C19 and electricity
Source input interface XS1, the second part include the 7th resistance R7, the 8th resistance R8 and the 20th capacitor C20；Described 17th
One end of capacitor C17 connects one end of the 18th capacitor C18 and the first foot of power input interface XS1, the 18th capacitor
One end of C18 is also connected with one end of the 19th capacitor C19 and one end and the V-by-one module 300 of the 7th resistance R7, and described
The other end of 17 capacitor C17, the 18th capacitor C18 and the 19th capacitor C19 are grounded, the power input interface XS1's
Crus secunda ground connection；One end of the other end of the 7th resistance R7 and the 8th resistance R8, one end of the 20th capacitor C20 and V-
By-one module 300 connects, and the other end of the 8th resistance R8 and the 20th capacitor C20 is grounded.
Please refer to Fig. 5 and Fig. 6, in the embodiment of the present invention, the EPI module 200 includes the first EPI interface EPI_R and the
Two EPI interface EPI_L, the first EPI interface EPI_R and the 2nd EPI interface EPI_L receive the sending of TV motherboard 100 respectively
8 groups of V-by-one differential signals, then 8 groups of V-by-one differential signals are reached into V-by-one module 300 respectively, arranged again
Arrange into the V-by-one standard signal of Standard Order.
It is fitted specifically, having in the TV motherboard 100 with the first EPI interface EPI_R and the 2nd EPI interface EPI_L phase
The 3rd EPI interface matched and the 4th EPI interface；When needing to carry out LCD TV to generate debugging or maintenance, by software control
LCD TV is become to export 8 groups of V-by-one differential signals from output EPI signal；Since EPI interface compatibility V-by-one is poor
Therefore sub-signal transmission can export 8 groups of V-by-one differential signals by the 3rd EPI interface and the 4th EPI interface, and pass
It, will by the first EPI interface EPI_R and the 2nd EPI interface EPI_L into the first EPI interface EPI_R and the 2nd EPI interface EPI_L
The V-by-one differential signal reaches V-by-one module 300, and in V-by-one module and control signal, power supply signal
It rearranges to Standard Order, exports V-by-one standard signal to screen driving plate (TCON), and then screen is driven to be shown
Show, to realize debugging or the maintenance conditions to TV motherboard 100.
Please refer to Fig. 7 and Fig. 8, in the embodiment of the present invention, the V-by-one module 300 includes sequentially connected exchange coupling
It closes in unit (unlabeled in figure) and V-by-one interface XS3, the first EPI interface EPI_R and the 2nd EPI interface EPI_L
It transmits 8 groups of V-by-one differential signals and power supply and control signal that said supply unit and control unit transmit is by standard
Sequence, which arranges and reaches AC coupled unit, carries out AC coupled, is then passed to V-by-one interface XS3 and forms V-by-one mark
V-by-one standard signal is sent to screen driving plate 500 (TCON) by V-by-one interface XS3 to drive screen aobvious by calibration signal
Diagram picture.
When it is implemented, being passed in the first EPI interface EPI_R and the 2nd EPI interface EPI_L in the embodiment of the present invention
Come rearrange after 8 groups of V-by-one differential signals need by AC coupled unit carry out AC coupled, then pass again
To V-by-one interface XS3, then arrange to form V-by-one by Standard Order with control signal in V-by-one interface XS3
Standard signal.
Optionally, please continue to refer to Fig. 5 to Fig. 8, in the embodiment of the present invention, the AC coupled unit includes the first electricity
Hold C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th electricity
Hold C8, the 9th capacitor C9, the tenth capacitor C10, the 11st capacitor C11, the 12nd capacitor C12, the 13rd capacitor C13, the 14th
Capacitor C14, the 15th capacitor C15 and the 16th capacitor C16；The first capacitor C1, the second capacitor C2, third capacitor C3,
Four capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10,
11st capacitor C11, the 12nd capacitor C12, the 13rd capacitor C13, the 14th capacitor C14, the 15th capacitor C15 and the 16th
One end of capacitor C16 is connect with the first EPI interface EPI_R and the 2nd EPI interface EPI_L respectively, the first capacitor C1, second
Capacitor C2, third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th
Capacitor C9, the tenth capacitor C10, the 11st capacitor C11, the 12nd capacitor C12, the 13rd capacitor C13, the 14th capacitor C14,
The other end of 15 capacitor C15 and the 16th capacitor C16 is connect with the V-by-one interface XS3 respectively.
Specifically, the first capacitor C1 connects the 13rd foot and V-by-one interface of the first EPI interface EPI_R
The 20th octal of XS3, the second capacitor C2 connect the 14th foot and the V-by- of the first EPI interface EPI_R
The 29th foot of one interface XS3, the third capacitor C3 connect the 19th foot of the first EPI interface EPI_R and described
The 31st foot of V-by-one interface XS3, the 4th capacitor C4 connect the 20th foot of the first EPI interface EPI_R
And the 32nd foot of the V-by-one interface XS3, the 5th capacitor C5 connect the of the first EPI interface EPI_R
34th foot of 22 feet and the V-by-one interface XS3, the 6th capacitor C6 connection the first EPI interface
35th foot of the 23rd foot of EPI_R and the V-by-one interface XS3, the 7th capacitor C7 connection described first
37th foot of the 20th octal of EPI interface EPI_R and the V-by-one interface XS3, the 8th capacitor C8 connection
The 29th foot of the first EPI interface EPI_R and the 30th octal of the V-by-one interface XS3；9th electricity
Hold C9 and connects the 32nd foot of the 2nd EPI interface EPI_L and the 40th foot of the V-by-one interface XS3, it is described
Tenth capacitor C10 connect the 2nd EPI interface EPI_L the 33rd foot and the V-by-one interface XS3 the 40th
One foot, the 11st capacitor C11 connect the 30th octal and the V-by-one interface of the 2nd EPI interface EPI_L
The 43rd foot of XS3, the 12nd capacitor C12 connect the 39th foot and the V- of the 2nd EPI interface EPI_L
The 44th foot of by-one interface XS3, the 13rd capacitor C13 connect the 41st of the 2nd EPI interface EPI_L
46th foot of foot and the V-by-one interface XS3, the 14th capacitor C14 connection the 2nd EPI interface EPI_L
The 42nd foot and the V-by-one interface XS3 the 47th foot, the 15th capacitor C15 connection described second
49th foot of the 47th foot of EPI interface EPI_L and the V-by-one interface XS3, the 16th capacitor C16 connect
Connect the 49th foot of the 2nd EPI interface EPI_L and the 50th foot of the V-by-one interface XS3；The V-by-
The tenth foot of one interface XS3, the 11st foot, the 12nd foot, the 13rd foot, the 27th foot, the 30th foot, the 33rd foot,
36th foot, the 39th foot, the 42nd foot, the 45th foot, the 40th octal and the 51st foot are grounded；It is described
The first foot to the octal of V-by-one interface XS3 connects 12V voltage, i.e., with the 17th capacitor C17, the 18th capacitor
One end of C18, the 19th capacitor C19 and the 7th resistance R7 connect.
Please continue to refer to Fig. 8, described control unit includes first resistor R1, second resistance R2 and signal output interface XS2,
The crus secunda of the signal output interface XS2 is connect with one end of first resistor R1 and V-by-one interface XS3, and the signal is defeated
The third foot of outgoing interface XS2 is connect with one end of second resistance R2 and V-by-one interface XS3, the first resistor R1 and second
The other end of resistance R2 interconnect and with the other end of the 7th resistance R7, one end of the 8th resistance R8, the 20th capacitor C20
One end and the connection of one end of the 6th resistance R6.
The V-by-one module 300 further includes signal input unit 302, and the signal input unit 302 includes third
Resistance R3, the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6, one end and the signal output of the 3rd resistor R3 connect
One end connection of the crus secunda and first resistor R1 of mouth XS2, one end of the 4th resistance R4 and the signal output interface XS2
Third foot and second resistance R2 one end connection, the 5th resistance R5 one end ground connection, one end of the 6th resistance R6
Meet first resistor R1, second resistance R2, the other end of the 7th resistance R7, one end of the 8th resistance R8 and the 20th capacitor C20
The other end of one end, the 3rd resistor R3, the 4th resistance R4 and the 5th resistance R5 respectively with V-by-one interface XS3 second
16 feet, the 25th foot and the connection of the 24th foot, one end of the 6th resistance R6 are another with the 5th resistance R5's
End and the connection of the 24th foot.
When it is implemented, in the embodiment of the present invention, the signal output interface XS2 is by the HTPDN signal of TV motherboard 100
It accesses with LOCKN signal, and exports from the crus secunda of signal output interface XS2 and third foot into signal input unit 302
3rd resistor R3 and the 4th resistance R4, then V-by-one interface XS3 is reached, by power supply signal, HTPDN signal and LOCKN signal
And the V-by-one standard signal after 8 groups of differential signal recombinations is according to current standard connection Sequential output to screen driving plate 500
(TCON), to drive display screen to show signal, and then judge whether TV motherboard 100 is normal, reaches and carries out to TV motherboard 100
The detection that debugging or maintenance are, and be not necessarily to be adapted to corresponding Tconless display screen, the efficiency of debugging or maintenance is improved,
Cost is saved.
Based on above-mentioned display screen interface signal conversion circuit, the present invention also provides a kind of display screen interface signals to turn
Changing device, including as above described in any item display screen interface signal conversion circuits.Due to the display screen interface signal
Conversion circuit is described in detail above, and details are not described herein.
Based on above-mentioned display screen interface signal conversion circuit and device, the present invention also provides a kind of display screen interfaces
Signal conversion method includes the following steps:
S100, display screen interface is connected between the TV motherboard and screen driving plate for the television set for needing to debug or repair
Signal conversion circuit；
It after S200, booting, is issued and is instructed by remote controler, after the chip of TV motherboard receives, program is by TV motherboard
The EPI signal exported on chip is converted to 8 groups of V-by-one differential signals, and exports to EPI module；
S300, it by 8 groups of V-by-one differential signals, power supply and control signal and is passed respectively by EPI module and control module
V-by-one standard signal is rearranged into V-by-one module；
The V-by-one standard signal rearranged is exported to screen driving plate and is shown by S400, the V-by-one module
Show, to confirm whether mainboard is normal.
When it is implemented, the program of conversion V-by-one signal is added in the software control process of TV motherboard chip,
In debugging or maintenance, TV power supply is opened, and presses corresponding remote controler specified button, remote controler issues infrared to TV
Instruction, TV motherboard chip judge whether to receive ultra-red order；If so, TV motherboard chip controls generate V-by-one letter
Number, and 8 groups of V-by-one differential signals are reached into the EPI module in display screen interface signal conversion circuit, and then by turning
It changes circuit and 8 groups of V-by-one differential signal control signals and power supply signal is rearranged into V-by-one standard signal, with suitable
The V-by-one display of standard is answered, and then the Tconless screen for not having to adaptation corresponding specification can survey TV motherboard
Examination；If it is not, then continuing to generate normal EPI signal, shown by driven by program Tconless screen.
The step S300 further include:
S301, by 8 groups of differential signals that the first EPI interface and the 2nd EPI interface transmit mainboard rearrange respectively to
AC coupled unit carries out AC coupled, then reaches V-by-one interface；
S302, power supply and control signal are reached respectively by V-by-one interface by power supply unit and control unit.
In conclusion display screen interface signal conversion circuit provided by the invention, device and method, wherein display
Screen interface signal conversion circuit is connect with TV motherboard and screen driving plate (TCON), which is characterized in that including sequentially connected EPI
Module, control module and V-by-one module；When debugging or repairing TV, 8 groups are sent from TV motherboard to the EPI module
V-by-one differential signal, by the EPI module by 8 groups of V-by-one differential signals, the control module by power supply and
Control signal simultaneously reaches V-by-one module and rearranges to form V-by-one standard signal, by V-by-one module by V-by-
One standard signal reaches screen driving plate (TCON), drives V-by-one screen to show V-by-one standard letter by screen driving plate
Number to confirm whether TV motherboard is normal.
The present invention is accessed by one display screen interface signal conversion circuit of setting in TV scheduling and planning or maintenance,
V-by-one standard signal is converted by the Tconless screen signal of different size, so that general V- can be used in TV motherboard
The test to TV can be realized in by-one screen.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (10)
1. a kind of display screen interface signal conversion circuit, connect with TV motherboard and screen driving plate, which is characterized in that including according to
EPI module, V-by-one module and the control module of secondary connection；When debugging or maintenance TV, from TV motherboard to the EPI mould
Block sends 8 groups of V-by-one differential signals by the EPI module for 8 groups of V-by-one differential signals, the control module
Power supply and control signal are reached V-by-one module and rearrange to form V-by-one standard signal, it will by V-by-one module
V-by-one standard signal reaches screen driving plate, drives V-by-one screen to show V-by-one standard signal by screen driving plate
To confirm whether TV motherboard is normal.
2. display screen interface signal conversion circuit according to claim 1, which is characterized in that the control module includes
Power supply unit and control unit, said supply unit are V-by-one module for power supply, and described control unit is to V-by-one module
Control signal is sent to control the normal output of V-by-one standard signal.
3. display screen interface signal conversion circuit according to claim 1, which is characterized in that the EPI module includes
First EPI interface and the 2nd EPI interface, the first EPI interface and the 2nd EPI interface receive the 8 of TV motherboard sending respectively
Group V-by-one differential signal, then 8 groups of V-by-one differential signals are reached into V-by-one module respectively.
4. display screen interface signal conversion circuit according to claim 2 or 3, which is characterized in that the V-by-one
Module includes sequentially connected AC coupled unit and V-by-one interface, is passed in the first EPI interface and the 2nd EPI interface
The 8 groups of V-by-one differential signals and said supply unit and the power supply that transmits of control output unit and control signal come by
Standard Order arranges and reaches AC coupled unit AC coupled, is then passed to V-by-one interface and forms V-by-one standard letter
Number, V-by-one standard signal is sent to screen driving plate to drive display image screen by V-by-one interface.
5. display screen interface signal conversion circuit according to claim 4, which is characterized in that the AC coupled unit
Including, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor,
9th capacitor, the tenth capacitor, the 11st capacitor, the 12nd capacitor, the 13rd capacitor, the 14th capacitor, the 15th capacitor and
16 capacitors；The first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor,
8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor, the 12nd capacitor, the 13rd capacitor, the 14th capacitor, the 15th
One end of capacitor and the 16th capacitor is connect with the first EPI interface and the 2nd EPI interface respectively, the first capacitor, the second electricity
Appearance, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor,
The other end difference of 11 capacitors, the 12nd capacitor, the 13rd capacitor, the 14th capacitor, the 15th capacitor and the 16th capacitor
It is connect with the V-by-one interface.
6. display screen interface signal conversion circuit according to claim 5, which is characterized in that described control unit includes
First resistor, second resistance and signal output interface, the crus secunda of the signal output interface and one end of first resistor and V-
The connection of by-one interface, the third foot of the signal output interface and one end of second resistance and V-by-one interface connect, institute
The other end for stating first resistor and second resistance is interconnected and is connect with power supply unit and V-by-one interface.
7. display screen interface signal conversion circuit according to claim 6, which is characterized in that the V-by-one module
It further include signal input unit, the signal input unit includes 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance,
One end of the 3rd resistor is connect with one end of the crus secunda of the signal output interface and first resistor, the 4th resistance
One end connect with one end of the third foot of the signal output interface and second resistance, one end of the 5th resistance ground connection,
The one of 6th resistance terminates the other end and power supply unit of first resistor, second resistance, the 3rd resistor, the 4th electricity
The other end of resistance and the 5th resistance connects with the 26th foot of V-by-one interface, the 25th foot and the 24th foot respectively
It connects, one end of the 6th resistance is connect with the other end of the 5th resistance and the 24th foot.
8. a kind of display screen interface signal conversion device, which is characterized in that including as claimed in any one of claims 1 to 6 aobvious
Show device screen interface signal conversion circuit.
9. a kind of display screen interface signal conversion method, which comprises the steps of:
The conversion of display screen interface signal is connected between the TV motherboard and screen driving plate for the television set for needing to debug or repair
Circuit；
After booting, is issued and instructed by remote controler, after the chip of TV motherboard receives, program will export on TV motherboard chip
EPI signal be converted to 8 groups of V-by-one differential signals, and export to EPI module；
It by 8 groups of V-by-one differential signals, power supply and is controlled signal respectively by EPI module and control module and reaches V-by-one
Module is rearranged into V-by-one standard signal；
The V-by-one standard signal rearranged is exported to screen driving plate and is shown by the V-by-one module, with confirmation
Whether mainboard is normal.
10. display screen interface signal conversion method according to claim 9, which is characterized in that it is described by EPI module with
Control module reaches V-by-one module and is rearranged into respectively by 8 groups of V-by-one differential signals, power supply and control signal
The step of standard V-by-one signal further include:
It is rearranged respectively by 8 groups of differential signals that the first EPI interface and the 2nd EPI interface transmit mainboard to AC coupled list
Member carries out AC coupled, then reaches V-by-one interface；
Power supply and control signal are reached respectively by V-by-one interface by power supply unit and control unit.
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| CN110459154B (en) | 2022-12-20 |
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