CN106921880A - A kind of separated LCD television - Google Patents
A kind of separated LCD television Download PDFInfo
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- CN106921880A CN106921880A CN201710313301.3A CN201710313301A CN106921880A CN 106921880 A CN106921880 A CN 106921880A CN 201710313301 A CN201710313301 A CN 201710313301A CN 106921880 A CN106921880 A CN 106921880A
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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
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43637—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11]
-
- 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
-
- 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
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
-
- 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
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
-
- 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
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
-
- 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
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
- H04N21/42206—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details
- H04N21/42225—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor characterized by hardware details characterized by types of remote control, e.g. universal remote control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention relates to liquid crystal technical field of motors, and in particular to a kind of separated LCD television, including display portion, signal processing and audio system, also including remote control switching circuit, lightning prevention circuit, Bluetooth control circuit and video enhancement circuitry；Bluetooth control circuit is used for mobile phone and connects television set, realize mobile phone control television set, video enhancement circuitry can increase the high fdrequency component of vision signal, so as to strengthen the contrast of television image, it can be also connected between video recorder output end and television set SCART inputs, be applied to the parallel single-phase formula anti-lightning surge circuit of piezo-resistance and ceramic gas discharge tube on the power supply of television set by lightning prevention circuit, it is broadly divided into lightning protection circuit part and switching power circuit part, circuit is simple, using combined type symmetric circuit, common mode, difference touches full guard will not cause phenomenon of catching fire, preferably ensure the safety of television set, simple structure of the present invention, simple operation, security performance is high, with very strong creativeness.
Description
Technical field
The present invention relates to liquid crystal technical field of motors, and in particular to a kind of separated LCD television.
Background technology
Liquid crystal display, is a kind of material between solid-state and liquid, is with the organic of systematicness molecules align
Compound, if it is heated the liquid condition that transparence can be presented, cools down it the muddy solid that crystalline particle then occurs
State.Just because of its this characteristic, so being referred to as liquid crystal.For the liquid crystal molecule structural arrangement class of liquid crystal display
Like thin match stick, it is referred to as Nematic liquid crystal, the liquid crystal display manufactured using such liquid crystal is also known as LCD.And liquid crystal is electric
Depending on being in the liquid crystal between two glass, to add voltage, changed by molecules align and tortuous change reproduced picture, screen leads to
The collision of electronic population is crossed, picture is manufactured and picture is formed by the perspective reflection of extraneous light.First liquid crystal in the world
Show that equipment is manufactured in early 1970s by Japanese Sharp, be referred to as TN-LCD (twisted-nematic) liquid crystal display.20 generation
Record the eighties, STN-LCD (super twisted nematic) liquid crystal display occurs, while TFT-LCD (thin film transistor (TFT)) liquid crystal display
Technology is developed, but liquid crystal technology still prematurity, it is difficult to popularize.Late 1980s to the beginning of the nineties, Japan grasps
STN-LCD and TFT-LCD production technologies, LCD industry starts high speed development.Split type television be the display portion of TV,
Signal processing, audio system are separated, and are made up of video display terminal (VDT), TV main frame, the part of television acoustics three.Break
The integrated tactic pattern of traditional tv three, solves traditional tv insurmountable problems for a long time, greatly
Amplitude improves service life, acoustics, the practical function of flat panel TV, and the historic personalization for realizing TV is determined
System (DIY), three big parts can be with independent assortment and upgrading, while being electricity also for the development of intelligent television provides necessary condition
Broken through depending on the revolution in development history, the consumption new concept of field of household appliances will be led.Come for current LCD TV
Say, the lightening unremitting pursuit as manufacturer and user, under the driving pursued herein, present LCD TV becomes more and more lighter
It is thin.In the patent document of Patent No. CN201610703074, a kind of separated LCD television is disclosed, the split type liquid crystal
TV includes display panel assembly and base assembly, and wherein display panel assembly is used to be shown using the vision signal of input and regarded
Frequently；Base assembly is used to export vision signal, and is provided with power panel, driving plate, LCDs logic card and stereo set；
Base assembly includes first base and second base；First base is connected with one end of the bottom of display panel assembly, and second
Base is connected with the other end of display panel assembly bottom.Because base assembly of the invention uses split-type design, relatively
Its volume is relatively small for the base of integration, therefore can be placed in its bottom when this LCD TV hangs, therefore
The thickness of LCD TV will not be impacted such that it is able to meet people for lightening pursuit.
Above-mentioned patent document uses split-type design, and its volume is relatively small for the base of integration, therefore
Its bottom can be placed in when this LCD TV hangs, therefore the thickness of LCD TV will not be impacted.But its is whole
Security is not high enough for body, for how to provide a kind of simple structure, simple operation, security performance split type liquid crystal electricity high
Depending on lacking technical solution.
The content of the invention
(1) technical problem for solving
In view of the shortcomings of the prior art, the invention provides a kind of separated LCD television, for solving how to provide one
Plant simple structure, simple operation, the problem of security performance separated LCD television high.
(2) technical scheme
To realize object above, the present invention is achieved by the following technical programs：
A kind of separated LCD television, including display portion, signal processing and audio system, it is characterised in that：Bag
Include remote control switching circuit, lightning prevention circuit, Bluetooth control circuit and video enhancement circuitry；City is exchanged in the remote control switching circuit
Through Cl current limlitings, D1, D2 rectification, D4 voltage stabilizings obtain the DC voltage of 5.1V to electricity after C2 filtering, powered to whole circuit, when pressing
During button on remote control, integration is infrared to accept the infrared ray flag secret mark that high-ranking military officer VDl is subject to accept putting New Year's Eve, and
Phase inverter C is added to after flag secret mark is demodulated into shaping, C4 is charged through D3, D5, when the threshold value of the voltage crosses phase inverter E on C4
After voltage, phase inverter upset, the lightning prevention circuit is by piezo-resistance and the parallel single-phase formula anti-lightning of ceramic gas discharge tube
Surge circuit is applied on the power supply of television set, is broadly divided into lightning protection circuit part and switching power circuit part, and circuit is simple,
Using combined type symmetric circuit, common mode, difference touch full guard, can be connected regardless of L, N-terminal, and the Bluetooth control circuit is used for mobile phone
Connection television set, realizes mobile phone control television set, and the video enhancement circuitry can increase the high fdrequency component of vision signal, so that
Strengthen the contrast of television image, it can be also connected between video recorder output end and television set SCART inputs.
Preferably, when the remote control switching circuit only has pulse number enough, the upper voltages of C4 can be only achieved the threshold value electricity of E
Pressure, this charge circuit is used to recognize the length for sending pulse that IC2 to be a double D flip-flop, and its pulse input end is received
Just there is once inside out in one long pulse, output situation, when the output end of IC2 is high electric daily common, bidirectional triode thyristor conducting,
Then lamp is bright；When output end is daily common low electricity, controllable silicon cut-off, lamp goes out, and R2, C3 are reset circuit, have certainty to restraining
Time delay sense lead, when former switch connection, IC2 exports high level by enforced reset, and then lamp is bright, so original opening is known
Often cheat, D6 is instruction of turning off the light.
Preferably, the Bluetooth control circuit includes power circuit, single-chip minimum system, television set drive module and indigo plant
Tooth module, power circuit is powered for whole system, including single-chip computer AT89C52, television set drive, bluetooth module and other outside
Enclose circuit.
Preferably, power circuit is in two sub-sections：(1) external power source is connect to be powered to television set；(2) made by 4 section dry cells
It is power supply, to system power supply, to ensure single-chip microcomputer, television set driving, the normal operation of bluetooth module, in power circuit to system
During power supply, green indicating lamp is lighted, and simply current power supply is normal, and single-chip minimum system part is the Based Intelligent Control of whole system
Part, is also the core of whole system, and television set drive module L298 needs to connect two voltages from outside, and one is to electricity
Depending on machine, another gives L298 chips.
Preferably, the triode T1 in the video enhancement circuitry circuit plays cushioning effect, and resistance R1 ensures enhancing electricity
The input impedance on road is about 75 Ω, and signal is added on amplifying stage T2, and its gain depends on the position of potentiometer P2, T2 base signals
Frequency characteristic restricted by P1, R6, C6, so to a certain extent can be by user's control (by P1), buffer stage T3 be provided
Enough electric currents, load for correctly driving most 75 Ω adjusts potentiometer P2, makes to be output as 1Vp-p.
Preferably, the lightning prevention circuit makes piezo-resistance RV1 be located at paster rectification module front end respectively with power supply L, N simultaneously
Connection, mainly carrys out clamper L, N voltage between lines, and piezo-resistance RV0, RV2 is grounded after connect with ceramic gas discharge tube FD1, RV0 and
FD1 series connection is mainly indirect lightning strike surge current on L lines of releasing, and RV2 connects with FD1 and mainly releases by signal port string people 24V
Energy on reference potential, after RV0, RV2 short-circuit failure, FD1 can separate it with power circuit, will not cause phenomenon of catching fire.
Preferably, connected on the RV1 front ends circuit of the lightning prevention circuit wire-wound resistor, when this RV1 short circuits are lost
During effect, wire-wound resistor can play a part of fuse, and short circuit current is disconnected, and piezo-resistance belongs to voltage clamp bit-type protection device,
Its clamp voltage point is that piezo-resistance parameter selection pressure sensitive voltage is higher, larger safer, durable, the failure of through-current capacity
Rate is low；According to discharge capacity requirement selection appearance and size and packing forms.
Preferably, the lightning prevention circuit connects to prolong using the piezo-resistance of 561k-10D with ceramic gas discharge tube
Long life and ensure safety, the discharge capacity of ceramic gas discharge tube discharge capacity selection as requested, circuit is used
3RM470L-7.5-L, through-current capacity is 5000A, and wire-wound resistor R1 plays current limliting partial pressure；Paster rectification module is Switching Power Supply
Circuit front-end rectified action, C1 is high-voltage filtering capacitor, and Y1 is decoupling capacitor, resistance R2 and electric capacity C2 and VD2 composition switch electricity
The absorbing clamp circuit of source chip metal-oxide-semiconductor, protects chip, and switching power source chip is serial using the TNY27 of PI Corp., and TR1 is height
Frequency power transformer, VD3, C3 constitute the secondary filtering of high frequency transformer, and U2, VD4, R3, R4, R5 constitute the feedback electricity of switching power circuit
Road, can be by transformer secondary output output voltage stabilization in design load.
(3) beneficial effect
Bluetooth control circuit of the invention is used for mobile phone and connects television set, realizes mobile phone control television set, video source modeling electricity
Road can increase the high fdrequency component of vision signal, so as to strengthen the contrast of television image, also it can be connected into video recorder output
Between end and television set SCART inputs, lightning prevention circuit resists the parallel single-phase formula of piezo-resistance and ceramic gas discharge tube
Lightning surge circuit is applied on the power supply of television set, is broadly divided into lightning protection circuit part and switching power circuit part, circuit
Simply, using combined type symmetric circuit, common mode, difference are touched full guard and will not cause phenomenon of catching fire, and preferably ensure the peace of television set
Entirely, simple structure of the present invention, simple operation, security performance is high, with very strong creativeness.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is video enhancement circuitry schematic diagram of the invention；
Fig. 2 is Bluetooth control circuit theory diagrams of the invention；
Fig. 3 is lightning prevention circuit circuit theory diagrams of the invention；
Fig. 4 is remote control switching circuit schematic diagram of the invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
A kind of separated LCD television, including display portion, signal processing and audio system, including remote control switch electricity
Road, lightning prevention circuit, Bluetooth control circuit and video enhancement circuitry；Electric main is through Cl current limlitings, D1, D2 in remote control switching circuit
Rectification, D4 voltage stabilizings obtain the DC voltage of 5.1V after C2 filtering, powered to whole circuit, when the button on remote control is pressed,
Integration is infrared to accept the infrared ray flag secret mark that high-ranking military officer VDl is subject to accept putting New Year's Eve, and by the adjustment of flag secret mark solution
Phase inverter C is added to after shape, C4 is charged through D3, D5, after the threshold voltage of the voltage crosses phase inverter E on C4, phase inverter is turned over
Turn, the parallel single-phase formula anti-lightning surge circuit of piezo-resistance and ceramic gas discharge tube is applied to television set by lightning prevention circuit
Power supply on, be broadly divided into lightning protection circuit part and switching power circuit part, circuit is simple, using combined type symmetric circuit,
Common mode, difference touch full guard, can be connected regardless of L, N-terminal, and Bluetooth control circuit is used for mobile phone and connects television set, realizes mobile phone control
Television set, video enhancement circuitry can increase the high fdrequency component of vision signal, so as to strengthen the contrast of television image, can also be by
It is connected between video recorder output end and television set SCART inputs.
When remote control switching circuit as shown in Figure 4 only has pulse number enough, the upper voltages of C4 can be only achieved the threshold value electricity of E
Pressure, this charge circuit is used to recognize the length for sending pulse that IC2 to be a double D flip-flop, and its pulse input end is received
Just there is once inside out in one long pulse, output situation, when the output end of IC2 is high electric daily common, bidirectional triode thyristor conducting,
Then lamp is bright；When output end is daily common low electricity, controllable silicon cut-off, lamp goes out, and R2, C3 are reset circuit, have certainty to restraining
Time delay sense lead, when former switch connection, IC2 exports high level by enforced reset, and then lamp is bright, so original opening is known
Often cheat, D6 is instruction of turning off the light.
Bluetooth control circuit as shown in Figure 2 includes power circuit, single-chip minimum system, television set drive module and indigo plant
Tooth module, power circuit is powered for whole system, including single-chip computer AT89C52, television set drive, bluetooth module and other outside
Enclose circuit.
Power circuit is in two sub-sections：(1) external power source is connect to be powered to television set；(2) by 4 section dry cells as power supply,
To system power supply, to ensure single-chip microcomputer, television set driving, the normal operation of bluetooth module, when power circuit is to system power supply,
Green indicating lamp is lighted, and simply current power supply is normal, and single-chip minimum system part is the intelligent control part of whole system,
The core of whole system, television set drive module L298 needs to connect two voltages from outside, one be to television set,
Another gives L298 chips.
Triode T1 in video enhancement circuitry circuit as shown in Figure 1 plays cushioning effect, and resistance R1 ensures enhancing electricity
The input impedance on road is about 75 Ω, and signal is added on amplifying stage T2, and its gain depends on the position of potentiometer P2, T2 base signals
Frequency characteristic restricted by P1, R6, C6, so to a certain extent can be by user's control (by P1), buffer stage T3 be provided
Enough electric currents, load for correctly driving most 75 Ω adjusts potentiometer P2, makes to be output as 1Vp-p.
Lightning prevention circuit as shown in Figure 3 makes piezo-resistance RV1 be located at paster rectification module front end respectively with power supply L, N simultaneously
Connection, mainly carrys out clamper L, N voltage between lines, and piezo-resistance RV0, RV2 is grounded after connect with ceramic gas discharge tube FD1, RV0 and
FD1 series connection is mainly indirect lightning strike surge current on L lines of releasing, and RV2 connects with FD1 and mainly releases by signal port string people 24V
Energy on reference potential, after RV0, RV2 short-circuit failure, FD1 can separate it with power circuit, will not cause phenomenon of catching fire.
Connected on the RV1 front ends circuit of lightning prevention circuit a wire-wound resistor, when this RV1 short-circuit failure, line is around electricity
Resistance can play a part of fuse, and short circuit current is disconnected, and piezo-resistance belongs to voltage clamp bit-type protection device, its clamp voltage point
I.e. piezo-resistance parameter selection pressure sensitive voltage is higher, larger safer, durable of through-current capacity, and fault rate is low；According to logical
Current capacity requirement selection appearance and size and packing forms.
Lightning prevention circuit connected with ceramic gas discharge tube using the piezo-resistance of 561k-10D increasing the service life and
Ensure safety, the discharge capacity of ceramic gas discharge tube discharge capacity selection as requested, circuit uses 3RM470L-
7.5-L, through-current capacity is 5000A, and wire-wound resistor R1 plays current limliting partial pressure；Paster rectification module is switching power circuit front end
Rectified action, C1 is high-voltage filtering capacitor, and Y1 is decoupling capacitor, resistance R2 and electric capacity C2 and VD2 composition switching power source chip MOS
The absorbing clamp circuit of pipe, protects chip, and switching power source chip is serial using the TNY27 of PI Corp., and TR1 is high frequency transformer,
VD3, C3 constitute the secondary filtering of high frequency transformer, and U2, VD4, R3, R4, R5 constitute the feedback circuit of switching power circuit, will can become
Depressor secondary output voltage stabilization is in design load.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.And, term " including ", "comprising" or its any other variant be intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention has been described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these modification or
Replace, do not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (8)
1. a kind of separated LCD television, including display portion, signal processing and audio system, it is characterised in that：Including
Remote control switching circuit, lightning prevention circuit, Bluetooth control circuit and video enhancement circuitry；Electric main in the remote control switching circuit
Through Cl current limlitings, D1, D2 rectification, D4 voltage stabilizings obtain the DC voltage of 5.1V after C2 filtering, powered to whole circuit, distant when pressing
During button on control device, integration is infrared to accept the infrared ray flag secret mark that high-ranking military officer VDl is subject to accept putting New Year's Eve, and will
Phase inverter C is added to after the demodulation shaping of flag secret mark, C4 is charged through D3, D5, when the threshold value electricity of the voltage crosses phase inverter E on C4
After pressure, phase inverter upset, the lightning prevention circuit is unrestrained by the parallel single-phase formula anti-lightning of piezo-resistance and ceramic gas discharge tube
Gush circuit to be applied on the power supply of television set, be broadly divided into lightning protection circuit part and switching power circuit part, circuit is simple, adopts
Combined type symmetric circuit is used, common mode, difference touch full guard, can be connected regardless of L, N-terminal, the Bluetooth control circuit connects for mobile phone
Television set is connect, mobile phone control television set is realized, the video enhancement circuitry can increase the high fdrequency component of vision signal, so as to increase
, can also be connected between video recorder output end and television set SCART inputs for it by the contrast of forceful electric power visible image.
2. separated LCD television according to claim 1, it is characterised in that：The remote control switching circuit only has pulse
When number is enough, the upper voltages of C4 can be only achieved the threshold voltage of E, and this charge circuit is used to recognize the length for sending pulse, IC2
It is a double D flip-flop, its pulse input end receives a long pulse, and output situation just occurs once inside out, when IC2's
Output end is daily common for electricity high, bidirectional triode thyristor conducting, and then lamp is bright；When output end is daily common low electricity, controllable silicon cuts
Only, lamp goes out, R2, C3 be reset circuit, to restraining there is inevitable time delay sense to lead, when former switch connection, IC2 by enforced reset,
Output high level, then lamp is bright, so is known in original opening often cheat, D6 is instruction of turning off the light.
3. separated LCD television according to claim 1, it is characterised in that：The Bluetooth control circuit includes power supply electricity
Road, single-chip minimum system, television set drive module and bluetooth module, power circuit is powered for whole system, including single-chip microcomputer
AT89C52, television set driving, bluetooth module and other peripheral circuits.
4. separated LCD television according to claim 3, it is characterised in that：Power circuit is in two sub-sections：(1) connect outer
Portion's power supply is powered to television set；(2) by 4 section dry cells as power supply, to system power supply, with ensure single-chip microcomputer, television set drive,
The normal operation of bluetooth module, when power circuit is to system power supply, green indicating lamp is lighted, and simply current power supply is normal, single
Piece machine minimum system part is the intelligent control part of whole system, is also the core of whole system, and television set drives mould
Block L298 needs to connect two voltages from outside, and one is that, to television set, another gives L298 chips.
5. separated LCD television according to claim 1, it is characterised in that：In the video enhancement circuitry circuit three
Pole pipe T1 plays cushioning effect, and resistance R1 ensures that the input impedance of the enhancing circuit is about 75 Ω, and signal is added on amplifying stage T2, its
Gain depends on the position of potentiometer P2, and the frequency characteristic of T2 base signals is restricted by P1, R6, C6, so to a certain degree
On can be by user's control (by P1), buffer stage T3 provides enough electric currents, and for correctly driving, most 75 Ω's is negative
Carry, adjust potentiometer P2, make to be output as 1Vp-p.
6. separated LCD television according to claim 1, it is characterised in that：The lightning prevention circuit makes piezo-resistance
RV1 be located at paster rectification module front end respectively with power supply L, N parallel, mainly carry out clamper L, N voltage between lines, piezo-resistance RV0,
RV2 is grounded after being connected with ceramic gas discharge tube FD1, and RV0 connects with FD1 and is mainly indirect lightning strike surge current on L lines of releasing,
RV2 connects with FD1 and mainly releases by the energy on signal port string people's 24V reference potentials, and after RV0, RV2 short-circuit failure, FD1 can
It is separated with power circuit, phenomenon of catching fire will not be caused.
7. separated LCD television according to claim 6, it is characterised in that：The RV1 front end of line of the lightning prevention circuit
Connected on road a wire-wound resistor, when this RV1 short-circuit failure, wire-wound resistor can play a part of fuse, will short circuit electricity
Road disconnects, and piezo-resistance belongs to voltage clamp bit-type protection device, and its clamp voltage point is that piezo-resistance parameter selection pressure sensitive voltage is high
Any, larger safer, durable of through-current capacity, fault rate is low；According to discharge capacity requirement selection appearance and size and encapsulation
Form.
8. separated LCD television according to claim 6, it is characterised in that：The lightning prevention circuit uses 561k-
The piezo-resistance of 10D connects to increase the service life and ensure safety with ceramic gas discharge tube, ceramic gas discharge tube it is logical
Current capacity discharge capacity selection as requested, circuit uses 3RM470L-7.5-L, and through-current capacity is 5000A, wire-wound resistor R1
Play current limliting partial pressure；Paster rectification module is the rectified action of switching power circuit front end, and C1 is high-voltage filtering capacitor, and Y1 is to go
Coupling electric capacity, resistance R2 and electric capacity C2 and VD2 constitute the absorbing clamp circuit of switching power source chip metal-oxide-semiconductor, protect chip, switch electricity
Source chip is serial using the TNY27 of PI Corp., and TR1 is high frequency transformer, and VD3, C3 constitute high frequency transformer secondary and filter, U2,
VD4, R3, R4, R5 constitute the feedback circuit of switching power circuit, can be by transformer secondary output output voltage stabilization in design load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313301.3A CN106921880A (en) | 2017-05-05 | 2017-05-05 | A kind of separated LCD television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313301.3A CN106921880A (en) | 2017-05-05 | 2017-05-05 | A kind of separated LCD television |
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| CN106921880A true CN106921880A (en) | 2017-07-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113163242A (en) * | 2020-01-22 | 2021-07-23 | 海信视像科技股份有限公司 | Display device control method and display device |
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| CN201153297Y (en) * | 2008-01-11 | 2008-11-19 | 罗浩 | Split type LCD television |
| CN201286150Y (en) * | 2008-09-22 | 2009-08-05 | 深圳创维－Rgb电子有限公司 | Split type liquid crystal television set |
| CN204810463U (en) * | 2015-07-28 | 2015-11-25 | 青岛茂泉电子科技有限公司 | Components of a whole that can function independently TV |
| CN105896512A (en) * | 2015-10-28 | 2016-08-24 | 苏州研工电子科技有限公司 | Lightning stroke-proof surge circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201153297Y (en) * | 2008-01-11 | 2008-11-19 | 罗浩 | Split type LCD television |
| CN201286150Y (en) * | 2008-09-22 | 2009-08-05 | 深圳创维－Rgb电子有限公司 | Split type liquid crystal television set |
| CN204810463U (en) * | 2015-07-28 | 2015-11-25 | 青岛茂泉电子科技有限公司 | Components of a whole that can function independently TV |
| CN105896512A (en) * | 2015-10-28 | 2016-08-24 | 苏州研工电子科技有限公司 | Lightning stroke-proof surge circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113163242A (en) * | 2020-01-22 | 2021-07-23 | 海信视像科技股份有限公司 | Display device control method and display device |
| CN113163243A (en) * | 2020-01-22 | 2021-07-23 | 海信视像科技股份有限公司 | Display device |
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