CN105516776B - A kind of detection circuit and display terminal - Google Patents
A kind of detection circuit and display terminal Download PDFInfo
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- CN105516776B CN105516776B CN201610052977.7A CN201610052977A CN105516776B CN 105516776 B CN105516776 B CN 105516776B CN 201610052977 A CN201610052977 A CN 201610052977A CN 105516776 B CN105516776 B CN 105516776B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The embodiment of the present invention discloses a kind of detection circuit and display terminal.The method comprising the steps of a: the switching signal of HDMI, DVI, VGA and AV input terminal is detected；Step b: according to the switching signal, by pre-set priority, the corresponding picture signal of an input terminal in HDMI, DVI, VGA and AV input terminal is selected；Step c: display described image signal.The technical solution of the embodiment of the present invention solves the problems, such as that inconvenience is manually operated in signal source selection.
Description
Technical field
The present invention relates to image display technology field more particularly to a kind of detection circuit and display terminals.
Background technique
The display terminals product function such as LCD monitor used at present is powerful, and has signal input very rich
Port can be compatible with the miscellaneous input signal of display.By taking a most common LCD monitor on the market as an example, its letter
Number input port typically is provided with two-way high-definition multimedia interface (High Definition Multimedia
Interface, HDMI) signal input port, Video Graphics Array (Video Graphics Array, VGA) signal is defeated all the way
Inbound port, all the way audio-video (Audio Video, AV) signal input port, all the way digital visual interface (Digital Visual
Interface, DVI) signal port etc..But it while bringing powerful compatibility, is also brought not to the use of user
Just.When in use, only signal source inputs user all the way under normal circumstances, in this case, if user is unfamiliar with input letter
Number type, any signal input port will be selected by not knowing.To which user can only use simplest method, by
A signal source selection is attempted, and finally can normally show picture is the signal source channels being arranged required for user.This measure is given
Great trouble is brought in operation.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of detection circuit and display terminal, to solve hand in signal source selection
Move inconvenient problem.
The embodiment of the present invention uses following technical scheme:
In a first aspect, the embodiment of the present invention provides a kind of automatic signal detection display methods, comprising the following steps:
A: the switching signal of HDMI, DVI, VGA and AV input terminal is detected；
B: an input terminal in HDMI, DVI, VGA and AV input terminal is selected by pre-set priority according to switching signal
Corresponding picture signal；
C: display image signals.
Second aspect, the embodiment of the present invention provide a kind of detection circuit, and detection circuit is using model TSUMV59XUS's
Chip U11, the detection circuit include HDMI detection circuit, DVI detection circuit, VGA detection circuit and the first AV detection circuit.
HDMI detection circuit include HDMI input terminal adapter P4 and P4 be 23pin, resistance R494, R503, R508,
R532, diode D112, triode Q35；One end of 92 feet of U11 and R532 connect, the other end of R532, R494 one end,
One end of R508,18 feet of P4 are connect with power output end, the 117 feet connection of the other end of R508, one end of R503 and U11,
The other end of R503 and the base stage of Q35 connect, the 19 feet connection of the other end of R494, the collector of Q35 and P4, and 19 feet of P4 are logical
Cross D112 with reference to connect, 1,3,4,6,7,9,10,12,15,16 feet of P4 respectively correspond with the 127 of U11,126,124,
123,121,120,119,118,125,122 feet connect, and 13,14 feet of P4 are hanging, the emitter of Q35, P4 remaining foot with
It is connected with reference to ground.
DVI detection circuit include DVI input terminal adapter CN10 and CN10 be 31pin, resistance R128, R130, R505,
R67, R489, diode D109, triode Q34；One end of 91 feet of U11 and R489 connect, and the one of the other end of R489, R128
End, one end of R130, one end of R67, CN10 14 feet connect with power output end, the other end of R67, R505 one end with
128 feet of U11 connect, and the other end of R505 and the base stage of Q34 connect, and the 16 of the other end of R128, the collector of Q34 and CN10
16 feet of foot connection, CN10 are connect by D109 with reference, and 1,2,6,7,9,10,17,18,23,24 feet of CN10 are right respectively
It should be connect with 9,10,11,8,6,7,3,4,2,1 foot of U11, the other end of 3,11,15,19,22,30,31 feet of CN10, R130
And the emitter of Q34 with reference is connect.
VGA detection circuit include VGA input terminal adapter P3 and P3 be 17pin, resistance R137, R138, R238, R535,
R538, capacitor C87, C91, C93, C100, C101, C102, C136, diode D7, D8；107 feet of U11 pass through R538's and P3
The connection of 12 feet is connect by R137 with power output end, D8 and C100 in parallel between 107 feet and reference ground of U11, and the 108 of U11
Foot is connected by 15 feet of R535 and P3, is connect by R138 with power output end, in parallel between 108 feet and reference ground of U11
1 foot of D7 and C101, P3 are connected by 19 feet of C87 and U11, and 2 feet of P3 are connected by 16 feet of C91 and U11,2 feet of P3
Connected by 17 feet of C93 and U11,3 feet of P3 are connected by 15 feet of C102 and U11,13,14 feet of P3 respectively correspond with
14,20 feet of U11 connect, and 18 feet of U11 are connected by one end of C136 and R238, and the other end of R238 is connect with reference,
4,9,11 feet of P3 are hanging, and remaining foot of P3 with reference is connect.
First AV detection circuit include the first AV input terminal adapter BNC1 and BNC1 be 4pin, resistance R125, R126,
R127, R129, R131, R132, R134, R136, R140, R244, R559, R563, capacitor C126, C134, C135, C150,
C103, C204, C430, diode D37, D131, triode Q17, Q18；114 feet of U11 are connected by the collector of R127 and Q17
It connects, one end connection of the collector of Q17, one end of R129 and C126, the emitter of Q17 and one end of R131 connect, R131's
The other end, one end of R132, one end of R140, the emitter of Q18, C135 one end connect with power output end, R132's is another
One end connection of one end, 3 feet of D37, the base stage of Q18 and C150, one end of the other end of R140, the base stage of Q17 and R125 connect
Connect, one end of the collector of Q18 and R136 connect, 1, the 2 feet connection of the other end of C150, one end of R134 and D37, C134 with
R134 is in parallel, and the other end of R134 is connected by 2 feet of R126 and BNC1, and 2 feet of BNC1 pass sequentially through R559, C103 and U11
The connection of 30 feet, 2 feet of BNC1 and with reference to D131, R563 and C430 in parallel between ground, 32 feet of U11 pass through C204's and R244
One end connection, the other end of R244, the other end of R125, the other end of R129, the other end of R136, C126 the other end,
The other end of C135 and 1,3,4 feet of BNC1 with reference are connect；U11 detects HDMI input terminal by 92 feet and 117 feet
Switching signal, detect by 91 feet and 128 feet DVI input terminal switching signal, by 107 feet and 108 feet detect VGA input
The switching signal at end, by 114 feet detect the first AV input terminal switching signal, by pre-set priority, select and export HDMI,
The corresponding picture signal of an input terminal in DVI, VGA and the first AV input terminal.
The third aspect, the embodiment of the present invention provide a kind of display terminal, including driving panel, liquid crystal display panel and power supply
Panel；Driving panel is provided with above-mentioned detection circuit, and driving panel is connect with liquid crystal display panel, power panel respectively, liquid crystal
Display panel is connect with power panel.
In conclusion automatic signal detection display methods includes step, a: detection in the technical solution of the embodiment of the present invention
The switching signal of HDMI, DVI, VGA and AV input terminal out；B: according to switching signal, by pre-set priority, select HDMI, DVI,
The corresponding picture signal of an input terminal in VGA and AV input terminal；C: display image signals.Detection circuit uses model
The chip U11 of TSUMV59XUS, detection circuit include HDMI detection circuit, DVI detection circuit, VGA detection circuit and the first AV
Detection circuit.Display terminal includes driving panel, liquid crystal display panel and power panel；Driving panel is provided with above-mentioned detection electricity
Road, driving panel are connect with liquid crystal display panel, power panel respectively, and liquid crystal display panel is connect with power panel.By certainly
Dynamic detection switching signal selects the corresponding picture signal of an input terminal to be shown, by signal source by hand by pre-set priority
Dynamic selection becomes to automatically select, and keeps the operation of user more convenient.
Detailed description of the invention
Fig. 1 is the method flow diagram that a kind of automatic signal detection that the embodiment of the present invention one provides is shown.
Fig. 2 is the method flow diagram that a kind of automatic signal detection provided by Embodiment 2 of the present invention is shown.
Fig. 3 a is a kind of master chip part pin connection schematic diagram for detection circuit that the embodiment of the present invention three provides.
Fig. 3 b is the circuit diagram for the HDMI detection circuit that the embodiment of the present invention three provides.
Fig. 3 c is the circuit diagram for the DVI detection circuit that the embodiment of the present invention three provides.
Fig. 3 d is the circuit diagram for the VGA detection circuit that the embodiment of the present invention three provides.
Fig. 3 e is the circuit diagram for the AV detection circuit that the embodiment of the present invention three provides.
Fig. 4 is a kind of structural schematic diagram for display terminal that the embodiment of the present invention four provides.
Specific embodiment
With reference to the accompanying drawing, the specific embodiment of the invention is explained in detail.It is understood that described herein
The specific embodiments are only for explaining the present invention, rather than limitation of the invention.In addition, for ease of description, only being shown in attached drawing
Part related to the present invention rather than full content.
Embodiment one
The embodiment of the present invention provides a kind of automatic signal detection display methods.This method can be at the displays such as LCD monitor end
It is applied on the product of end.As shown in Figure 1, this method can comprise the following steps that
S110, the switching signal for detecting HDMI, DVI, VGA and AV input terminal.
In the display terminals product such as LCD monitor, the signal type of signal source may include HDMI signal, DVI signal, VGA
Signal and AV signal.It, can be by HDMI detection circuit, DVI detection circuit, VGA detection circuit in the specific implementation process of this step
Detection circuit is constituted with sub-circuits such as AV detection circuits.The defeated of HDMI, DVI, VGA and AV input terminal is detected by the detection circuit
Enter signal；The input signal includes the data-signals such as picture signal, audio signal, clock signal, synchronization signal；It also include switching
Signal, switching signal are used to indicate that HDMI, DVI, VGA and AV input terminal have no signal access.In detection circuit, switching signal can
Indicate whether input terminal has signal access according to the low and high level state of signal, such as high level indicates that input terminal has signal to connect
Enter, low level indicates the access of input terminal no signal.When the display terminals product such as LCD monitor powers on, by detection circuit
Automatically scanning is carried out to HDMI, DVI, VGA and AV input terminal, when detecting that some input terminal has signal access, such as
HDMI input terminal has signal access, then the corresponding switching signal of HDMI input terminal can be transferred to detection circuit by HDMI detection circuit
Master chip carry out follow-up signal processing.
S120, according to switching signal, by pre-set priority, select an input in HDMI, DVI, VGA and AV input terminal
Hold corresponding picture signal.
S130, display image signals.
According to the switching signal that step S110 is detected, the master chip of detection circuit can select have letter by pre-set priority
Number access input terminal in an input terminal input signal.The pre-set priority can set gradually from high to low for HDMI,
DVI, VGA, AV input terminal.It should be noted that pre-set priority can also be set gradually from high to low as HDMI, AV, VGA, DVI
Input terminal, the embodiment of the present invention are not limited in any way the set-up mode of pre-set priority.Illustratively, if detect HDMI and
When DVI input terminal has signal access, set gradually by high to Low as the pre-set priority of HDMI, DVI, VGA, AV input terminal, inspection
The picture signal in input signal corresponding to HDMI input terminal may be selected in the master chip of slowdown monitoring circuit.The picture signal is exported,
And the picture of HDMI input terminal can be shown automatically by display terminal, it is no longer necessary to which user selects signal source manually
It selects.
In the present embodiment, automatic signal detection display methods includes step, a: detects that HDMI, DVI, VGA and AV are inputted
The switching signal at end；B: select one in HDMI, DVI, VGA and AV input terminal defeated by pre-set priority according to switching signal
Enter and holds corresponding picture signal；C: display image signals.By detecting switching signal automatically, by pre-set priority, one is selected
The corresponding picture signal of input terminal is shown, signal source is become to automatically select by manually selecting, makes the operation of user more
It is convenient.
Embodiment two
On the basis of the embodiment of the present invention one, the embodiment of the present invention provides another automatic signal detection display methods.
As shown in Fig. 2, this method can repeat step S110, S120 and S130 after the step S130 of embodiment one.Carry out circulation inspection
Measure switching signal, selection picture signal and display image signals.In the present embodiment, pre-set priority is successively set from high to low
It is set to HDMI, DVI, VGA, AV input terminal；Wherein, AV input terminal may include the first AV input terminal and the 2nd AV input terminal, first
The pre-set priority of AV input terminal may be configured as the pre-set priority higher than the 2nd AV input terminal.In the present embodiment, it is back to step
During rapid S110 is recycled, if detecting has than the input terminal for currently showing that input terminal priority is high corresponding to picture
When signal accesses, then pre-set priority is pressed, picture signal corresponding to the high input terminal of priority can be exported, to show that this is excellent
The picture of the high input terminal of first grade.Illustratively, the picture of the current VGA Display input terminal of display terminal, if cycle detection arrives
HDMI input terminal has signal access, then the master chip of detection circuit can be according to the switching signal of HDMI input terminal, by default preferential
Grade, selects and exports the corresponding picture signal of HDMI input terminal, and the picture of HDMI input terminal is shown by the display screen of display terminal
Face.
As shown in Fig. 2, after step s 130, can also increase following steps:
S210, shutdown signal is obtained, closes the selection to picture signal.
In above-mentioned cyclic process, the automatic function selecting to signal source can be closed by remote controler.Display terminal obtains
After the shutdown signal of remote controler, even if detecting has letter than the input terminal for currently showing that input terminal priority is high corresponding to picture
Number access when, step S120 can not be executed, i.e., to the picture signal of input terminal without switching select.Display terminal can be fixed aobvious
Show the picture of current input terminal, will not false tripping show remaining input terminal picture.
In the present embodiment, cycle detection switching signal, selection picture signal and display image signals are carried out, are improved aobvious
Show that the display of terminal is intelligent；Shutdown signal is obtained, the selection to picture signal is closed, the false tripping for avoiding display terminal is aobvious
Show.
Embodiment three
The embodiment of the present invention provides a kind of detection circuit, and as shown in Fig. 3 a~Fig. 3 e, which uses model
The chip U11 of TSUMV59XUS, the detection circuit include HDMI detection circuit, DVI detection circuit, VGA detection circuit and first
AV detection circuit.
HDMI detection circuit include HDMI input terminal adapter P4 and P4 be 23pin, resistance R494, R503, R508,
R532, diode D112, triode Q35；One end of 92 feet of U11 and R532 connect, the other end of R532, R494 one end,
One end of R508,18 feet of P4 are connect with power output end, the 117 feet connection of the other end of R508, one end of R503 and U11,
The other end of R503 and the base stage of Q35 connect, the 19 feet connection of the other end of R494, the collector of Q35 and P4, and 19 feet of P4 are logical
Cross D112 with reference to connect, 1,3,4,6,7,9,10,12,15,16 feet of P4 respectively correspond with the 127 of U11,126,124,
123,121,120,119,118,125,122 feet connect, and 13,14 feet of P4 are hanging, the emitter of Q35, P4 remaining foot with
It is connected with reference to ground.It can be to the reference signal ground or power ground etc..
DVI detection circuit include DVI input terminal adapter CN10 and CN10 be 31pin, resistance R128, R130, R505,
R67, R489, diode D109, triode Q34；One end of 91 feet of U11 and R489 connect, and the one of the other end of R489, R128
End, one end of R130, one end of R67, CN10 14 feet connect with power output end, the other end of R67, R505 one end with
128 feet of U11 connect, and the other end of R505 and the base stage of Q34 connect, and the 16 of the other end of R128, the collector of Q34 and CN10
16 feet of foot connection, CN10 are connect by D109 with reference, and 1,2,6,7,9,10,17,18,23,24 feet of CN10 are right respectively
It should be connect with 9,10,11,8,6,7,3,4,2,1 foot of U11, the other end of 3,11,15,19,22,30,31 feet of CN10, R130
And the emitter of Q34 with reference is connect.
VGA detection circuit include VGA input terminal adapter P3 and P3 be 17pin, resistance R137, R138, R238, R535,
R538, capacitor C87, C91, C93, C100, C101, C102, C136, diode D7, D8；107 feet of U11 pass through R538's and P3
The connection of 12 feet is connect by R137 with power output end, D8 and C100 in parallel between 107 feet and reference ground of U11, and the 108 of U11
Foot is connected by 15 feet of R535 and P3, is connect by R138 with power output end, in parallel between 108 feet and reference ground of U11
1 foot of D7 and C101, P3 are connected by 19 feet of C87 and U11, and 2 feet of P3 are connected by 16 feet of C91 and U11,2 feet of P3
Connected by 17 feet of C93 and U11,3 feet of P3 are connected by 15 feet of C102 and U11,13,14 feet of P3 respectively correspond with
14,20 feet of U11 connect, and 18 feet of U11 are connected by one end of C136 and R238, and the other end of R238 is connect with reference,
4,9,11 feet of P3 are hanging, and remaining foot of P3 with reference is connect.
First AV detection circuit include the first AV input terminal adapter BNC1 and BNC1 be 4pin, resistance R125, R126,
R127, R129, R131, R132, R134, R136, R140, R244, R559, R563, capacitor C126, C134, C135, C150,
C103, C204, C430, diode D37, D131, triode Q17, Q18；114 feet of U11 are connected by the collector of R127 and Q17
It connects, one end connection of the collector of Q17, one end of R129 and C126, the emitter of Q17 and one end of R131 connect, R131's
The other end, one end of R132, one end of R140, the emitter of Q18, C135 one end connect with power output end, R132's is another
One end connection of one end, 3 feet of D37, the base stage of Q18 and C150, one end of the other end of R140, the base stage of Q17 and R125 connect
Connect, one end of the collector of Q18 and R136 connect, 1, the 2 feet connection of the other end of C150, one end of R134 and D37, C134 with
R134 is in parallel, and the other end of R134 is connected by 2 feet of R126 and BNC1, and 2 feet of BNC1 pass sequentially through R559, C103 and U11
The connection of 30 feet, 2 feet of BNC1 and with reference to D131, R563 and C430 in parallel between ground, 32 feet of U11 pass through C204's and R244
One end connection, the other end of R244, the other end of R125, the other end of R129, the other end of R136, C126 the other end,
The other end of C135 and 1,3,4 feet of BNC1 with reference are connect.U11 detects HDMI input terminal by 92 feet and 117 feet
Switching signal, detect by 91 feet and 128 feet DVI input terminal switching signal, by 107 feet and 108 feet detect VGA input
The switching signal at end, by 114 feet detect the first AV input terminal switching signal, by pre-set priority, select and export HDMI,
The corresponding picture signal of an input terminal in DVI, VGA and the first AV input terminal.Switching signal be used to indicate HDMI, DVI,
VGA and the first AV input terminal have no signal access.In detection circuit, switching signal can be indicated according to the low and high level state of signal
Whether input terminal has signal access.It illustratively, can table when detection circuit detects that the switching signal of input terminal is high level
Show that the input terminal has signal access, when detection circuit detects that the switching signal of input terminal is low level, can indicate the input
No signal is held to access.
Wherein, R136, R535 and R538 are 10 Ω, and R559 is that 33 Ω, R238 and R244 are 68 Ω, R563 75
Ω, R126, R127, R128, R131, R494, R505 and R503 are 1K Ω, and R137 is 2.7K Ω, and R138 is 4.7K Ω, R67,
R129, R140, R489, R508 and R532 are 10K Ω, and R130 is 47K Ω, and R125, R132 and R134 are 100K Ω, C87,
C91, C93, C102, C103, C136 and C204 are that 47nF, C100 and C101 are 22pF, C430 100pF, C150 0.1
μ F, C126 and C135 are that 2.2 μ F, C134 are that 10 μ F, D109 and D112 are 5V/0.15pF antistatic diode, D7 and D8
It is 18V/3pF antistatic diode, D131 is 5V/3pF antistatic diode, the model BAT54A's, Q34 and Q35 of D37
Model is that the model of 3904, Q17 and Q18 is 3906, pre-set priority can set gradually from high to low for HDMI, DVI,
VGA, the first AV input terminal.When detection circuit powers on, detection circuit can be to HDMI, DVI, VGA and the first AV input terminal
Carry out automatically scanning.When detecting that some input terminal has signal access, such as HDMI input terminal has signal access, then HDMI
The corresponding switching signal of HDMI input terminal can be transferred to the master chip U11 of detection circuit by detection circuit.U11 believes according to the switching
Number, it can select and export the corresponding picture signal of HDMI input terminal to display terminal to be shown by pre-set priority.
The detection circuit further includes the 2nd AV detection circuit, and the 2nd AV detection circuit includes that the 2nd AV inputs terminal adapter
BNC2 and BNC2 are 4pin, resistance R141, R142, R149, R150, R151, R153, R152, R156, R155, R561, R564,
Capacitor C151, C152, C153, C167, C64, C431, diode D32, D125, triode Q19, Q20；110 feet of U11 pass through
The collector of R149 and Q19 connects, and one end of the collector of Q19 and R150, one end of C151 connect, the emitter of Q19 with
One end of R151 connects, the other end of R151, one end of R153, one end of R155, the emitter of Q20, one end of C153 and electricity
Source output terminal connection, one end connection of the other end of R153,3 feet of D32, the base stage of Q20 and C167, the other end, the Q19 of R155
Base stage and one end of R141 connect, one end of the collector of Q20 and R156 connect, the other end of C167, R152 one end with
1,2 feet of D32 connect, and C152 is in parallel with R152, and the other end of R152 passes through the 2 feet connection of R142 and BNC2,2 feet of BNC2 according to
Secondary 31 feet by R561, C64 and U11 connect, D125, R564 and C431 in parallel between 2 feet and reference ground of BNC2, R141's
The other end, the other end of R150, the other end of R156, the other end of C151,1,3,4 feet of the other end of C153 and BNC2 are equal
With reference it connect.
Wherein, R156 is 10 Ω, and R561 is 33 Ω, and R564 is 75 Ω, and R142, R149 and R151 are 1K Ω, R150 and
R155 is 10K Ω, and R141, R152 and R153 are 100K Ω, and C64 47nF, C431 100pF, C167 are 0.1 μ F,
C151 and C153 is 2.2 μ F, and C152 is that 10 μ F, D125 are 5V/3pF antistatic diode, the model BAT54A, Q19 of D32
Model with Q20 is 3906, and the pre-set priority of the first AV input terminal may be configured as excellent higher than presetting for the 2nd AV input terminal
First grade.
It should be noted that the component and its parameter of the above detection circuit, the only preferred embodiment party of the technical program
Formula, the technical program can also select other components and its parameter；According to common knowledge, the ordinary skill of the art
Personnel, the application scenarios different for the technical program do not need to play creativity, so that it may adjust component and its parameter
It is whole.
In the present embodiment, detection circuit uses the chip U11 of model TSUMV59XUS, and detection circuit includes HDMI detection
Circuit, DVI detection circuit, VGA detection circuit and the first AV detection circuit.U11 is defeated by detection HDMI, DVI, VGA, the first AV
The switching signal for entering end is selected and exports the corresponding picture signal of an input terminal to be shown by pre-set priority, by signal
Source becomes to automatically select by manually selecting, and keeps the operation of user more convenient.
Example IV
The embodiment of the present invention provides a kind of display terminal.As shown in figure 4, the display terminal includes driving panel 410, liquid crystal
Display panel 420 and power panel 430；Driving panel 410 is provided with above-mentioned detection circuit, driving panel 410 respectively with liquid crystal
Display panel 420, power panel 430 connect, and liquid crystal display panel 420 is connect with power panel 430.
Wherein, driving panel 410 includes mainboard, keypad, the components such as pinboard.By mainboard, keypad, the portions such as pinboard
Part is connected with each other and in load module box, forms the driving panel 410 of an entirety, driving panel 410 for detect HDMI,
The switching signal of DVI, VGA and AV input terminal is selected by pre-set priority and is exported the corresponding picture signal of an input terminal extremely
Liquid crystal display panel 420.Liquid crystal display panel 420 includes liquid crystal display, and ox horn connects pinboard, the components such as hardboard.By liquid crystal
The point screen driving mouth of screen connect pinboard with point screen line with ox horn and is connected, hardboard electric wire is connect pinboard with ox horn
It is connected and is transferred in modular cartridge, forms the liquid crystal display panel 420 of an entirety.Liquid crystal display panel 420 drives for showing
The picture signal that dynamic panel 410 exports.Power panel 430 is used to provide stabilization to driving panel 410 and liquid crystal display panel 420
Operating voltage.Driving panel 410, liquid crystal display panel 420 and power panel 430 are all made of drawing and pulling type mode between any two
Connection forms display terminal.The driving panel 410 of display terminal can detect the switching of HDMI, DVI, VGA and AV input terminal automatically
Signal selects and exports the liquid crystal display panel of the corresponding picture signal of an input terminal to display terminal by pre-set priority
420 are shown.
In the present embodiment, display terminal includes driving panel, liquid crystal display panel and power panel；Driving panel is provided with
Above-mentioned detection circuit, driving panel are connect with liquid crystal display panel, power panel respectively, and liquid crystal display panel and power panel connect
It connects.Display terminal detects the switching signal of HDMI, DVI, VGA and AV input terminal automatically, by pre-set priority, selects and exports one
The corresponding picture signal of a input terminal is shown, signal source is become to automatically select by manually selecting, makes the operation of user more
For convenience.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For, the present invention can have various modifications and changes in specific embodiment.All institutes within the spirit and principles of the present invention
Any modification, equivalent replacement, obvious variant for making etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of detection circuit, which is characterized in that the detection circuit using model TSUMV59XUS chip U11, it is described
Detection circuit includes HDMI detection circuit, DVI detection circuit, VGA detection circuit and the first AV detection circuit；
The HDMI detection circuit include HDMI input terminal adapter P4 and P4 be 23pin, resistance R494, R503, R508,
R532, diode D112, triode Q35；One end of 92 feet of U11 and R532 connect, the other end of R532, R494 one end,
One end of R508,18 feet of P4 are connect with power output end, the 117 feet connection of the other end of R508, one end of R503 and U11,
The other end of R503 and the base stage of Q35 connect, the 19 feet connection of the other end of R494, the collector of Q35 and P4, and 19 feet of P4 are logical
Cross D112 with reference to connect, 1,3,4,6,7,9,10,12,15,16 feet of P4 respectively correspond with the 127 of U11,126,124,
123,121,120,119,118,125,122 feet connect, and 13,14 feet of P4 are hanging, the emitter of Q35, P4 remaining foot with
It is connected with reference to ground；
The DVI detection circuit include DVI input terminal adapter CN10 and CN10 be 31pin, resistance R128, R130, R505,
R67, R489, diode D109, triode Q34；One end of 91 feet of U11 and R489 connect, and the one of the other end of R489, R128
End, one end of R130, one end of R67, CN10 14 feet connect with power output end, the other end of R67, R505 one end with
128 feet of U11 connect, and the other end of R505 and the base stage of Q34 connect, and the 16 of the other end of R128, the collector of Q34 and CN10
16 feet of foot connection, CN10 are connect by D109 with reference, and 1,2,6,7,9,10,17,18,23,24 feet of CN10 are right respectively
It should be connect with 9,10,11,8,6,7,3,4,2,1 foot of U11, the other end of 3,11,15,19,22,30,31 feet of CN10, R130
And the emitter of Q34 with reference is connect；
The VGA detection circuit include VGA input terminal adapter P3 and P3 be 17pin, resistance R137, R138, R238, R535,
R538, capacitor C87, C91, C93, C100, C101, C102, C136, diode D7, D8；107 feet of U11 pass through R538's and P3
The connection of 12 feet is connect by R137 with power output end, D8 and C100 in parallel between 107 feet and reference ground of U11, and the 108 of U11
Foot is connected by 15 feet of R535 and P3, is connect by R138 with power output end, in parallel between 108 feet and reference ground of U11
1 foot of D7 and C101, P3 are connected by 19 feet of C87 and U11, and 2 feet of P3 are connected by 16 feet of C91 and U11,2 feet of P3
Connected by 17 feet of C93 and U11,3 feet of P3 are connected by 15 feet of C102 and U11,13,14 feet of P3 respectively correspond with
14,20 feet of U11 connect, and 18 feet of U11 are connected by one end of C136 and R238, and the other end of R238 is connect with reference,
4,9,11 feet of P3 are hanging, and remaining foot of P3 with reference is connect；
The first AV detection circuit include the first AV input terminal adapter BNC1 and BNC1 be 4pin, resistance R125, R126,
R127, R129, R131, R132, R134, R136, R140, R244, R559, R563, capacitor C126, C134, C135, C150,
C103, C204, C430, diode D37, D131, triode Q17, Q18；114 feet of U11 are connected by the collector of R127 and Q17
It connects, one end connection of the collector of Q17, one end of R129 and C126, the emitter of Q17 and one end of R131 connect, R131's
The other end, one end of R132, one end of R140, the emitter of Q18, C135 one end connect with power output end, R132's is another
One end connection of one end, 3 feet of D37, the base stage of Q18 and C150, one end of the other end of R140, the base stage of Q17 and R125 connect
Connect, one end of the collector of Q18 and R136 connect, 1, the 2 feet connection of the other end of C150, one end of R134 and D37, C134 with
R134 is in parallel, and the other end of R134 is connected by 2 feet of R126 and BNC1, and 2 feet of BNC1 pass sequentially through R559, C103 and U11
The connection of 30 feet, 2 feet of BNC1 and with reference to D131, R563 and C430 in parallel between ground, 32 feet of U11 pass through C204's and R244
One end connection, the other end of R244, the other end of R125, the other end of R129, the other end of R136, C126 the other end,
The other end of C135 and 1,3,4 feet of BNC1 with reference are connect；U11 detects HDMI input terminal by 92 feet and 117 feet
Switching signal, detect by 91 feet and 128 feet DVI input terminal switching signal, by 107 feet and 108 feet detect VGA input
The switching signal at end, the switching signal that the first AV input terminal is detected by 114 feet are selected and are exported described by pre-set priority
The corresponding picture signal of an input terminal in HDMI, DVI, VGA and the first AV input terminal.
2. detection circuit as described in claim 1, which is characterized in that described R136, R535 and R538 are 10 Ω, and R559 is
33 Ω, R238 and R244 are 68 Ω, and R563 is 75 Ω, and R126, R127, R128, R131, R494, R505 and R503 are 1K
Ω, R137 are 2.7K Ω, and R138 is 4.7K Ω, and R67, R129, R140, R489, R508 and R532 are 10K Ω, R130 47K
Ω, R125, R132 and R134 are 100K Ω, and C87, C91, C93, C102, C103, C136 and C204 are 47nF, C100 and
C101 is 22pF, C430 100pF, C150 be 0.1 μ F, C126 and C135 be 2.2 μ F, C134 be 10 μ F, D109 and
D112 is 5V/0.15pF antistatic diode, and D7 and D8 are 18V/3pF antistatic diode, and D131 prevents quiet for 5V/3pF
Electric diode, the model of the model BAT54A, Q34 and Q35 of D37 are that the model of 3904, Q17 and Q18 is 3906, described
Pre-set priority is followed successively by HDMI, DVI, VGA, the first AV input terminal from high to low.
3. detection circuit as described in claim 1, which is characterized in that the detection circuit further includes the 2nd AV detection circuit,
The 2nd AV detection circuit include the 2nd AV input terminal adapter BNC2 and BNC2 be 4pin, resistance R141, R142, R149,
R150, R151, R153, R152, R156, R155, R561, R564, capacitor C151, C152, C153, C167, C64, C431, two poles
Pipe D32, D125, triode Q19, Q20；110 feet of U11 are connected by the collector of R149 and Q19, the collector of Q19 with
One end connection of one end of R150, C151, the emitter of Q19 and one end of R151 connect, and the one of the other end of R151, R153
End, one end of R155, the emitter of Q20, C153 one end connect with power output end, the other end of R153, D32 3 feet,
The base stage of Q20 and one end of C167 connect, one end connection of the other end of R155, the base stage of Q19 and R141, the collector of Q20
It is connect with one end of R156,1, the 2 feet connection of the other end of C167, one end of R152 and D32, C152 is in parallel with R152, R152
The other end connected by 2 feet of R142 and BNC2,2 feet of BNC2 pass sequentially through the 31 feet connection of R561, C64 and U11, BNC2
2 feet and with reference to D125, R564 and C431 in parallel between ground, the other end of R141, the other end of R150, R156 the other end,
1,3,4 feet of the other end of C151, the other end of C153 and BNC2 with reference are connect.
4. detection circuit as claimed in claim 3, which is characterized in that the R156 is 10 Ω, and R561 is 33 Ω, R564 75
Ω, R142, R149 and R151 are that 1K Ω, R150 and R155 are 10K Ω, and R141, R152 and R153 are 100K Ω, C64
For 47nF, C431 100pF, C167 be 0.1 μ F, C151 and C153 be 2.2 μ F, C152 be 10 μ F, D125 for 5V/3pF it is anti-
The model of electrostatic diode, the model BAT54A, Q19 and Q20 of D32 is 3906, and presetting for the first AV input terminal is excellent
First grade is higher than the pre-set priority of the 2nd AV input terminal.
5. a kind of display terminal, which is characterized in that including driving panel, liquid crystal display panel and power panel；The drive surface
Plate is provided with the described in any item detection circuits of claim 1-4, the driving panel respectively with the liquid crystal display panel, institute
Power panel connection is stated, the liquid crystal display panel is connect with the power panel.
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| CN105931589A (en) * | 2016-04-25 | 2016-09-07 | 京东方科技集团股份有限公司 | Signal source detection device and method, and display device |
| CN105810032B (en) * | 2016-05-27 | 2018-12-04 | 山东力明科技职业学院 | A kind of teaching equipment intelligent controlling device and its application |
| CN112087583A (en) * | 2020-09-16 | 2020-12-15 | 深圳Tcl新技术有限公司 | Display method, display device, multimedia equipment and storage medium |
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| CN101309354A (en) * | 2008-06-24 | 2008-11-19 | 四川长虹电器股份有限公司 | Channel automatic switch system and method of display equipment signal source |
| CN103685984A (en) * | 2013-12-30 | 2014-03-26 | 天津三星电子有限公司 | Video signal source automatic switching method and television |
| CN103747369A (en) * | 2013-11-27 | 2014-04-23 | 乐视致新电子科技（天津）有限公司 | Intelligent household control method and apparatus, and intelligent household system |
| CN205336471U (en) * | 2016-01-26 | 2016-06-22 | 深圳市维冠视界科技股份有限公司 | Detection circuitry and display terminal |
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| KR20040078342A (en) * | 2003-03-04 | 2004-09-10 | 현대 이미지퀘스트(주) | Method and apparatus for display input mode by automatically detecting input devices |
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| CN101309354A (en) * | 2008-06-24 | 2008-11-19 | 四川长虹电器股份有限公司 | Channel automatic switch system and method of display equipment signal source |
| CN103747369A (en) * | 2013-11-27 | 2014-04-23 | 乐视致新电子科技（天津）有限公司 | Intelligent household control method and apparatus, and intelligent household system |
| CN103685984A (en) * | 2013-12-30 | 2014-03-26 | 天津三星电子有限公司 | Video signal source automatic switching method and television |
| CN205336471U (en) * | 2016-01-26 | 2016-06-22 | 深圳市维冠视界科技股份有限公司 | Detection circuitry and display terminal |
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Address after: 518000 3 / F, building A8 and building A9, silicon valley power intelligent terminal Industrial Park, No. 20, Dafu Industrial Zone, Aobei community, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN WEIGUAN VIEWS TECHNOLOGY Co.,Ltd. Address before: Building A8, silicon valley power intelligent terminal Industrial Park, No. 20, Dafu Industrial Zone, Aobei community, Guanlan street, Longhua New District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN WEIGUAN VIEWS TECHNOLOGY Co.,Ltd. |
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