CN102411405B - High-performance novel television-computer integrated machine - Google Patents
High-performance novel television-computer integrated machine Download PDFInfo
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- CN102411405B CN102411405B CN201110363432.5A CN201110363432A CN102411405B CN 102411405 B CN102411405 B CN 102411405B CN 201110363432 A CN201110363432 A CN 201110363432A CN 102411405 B CN102411405 B CN 102411405B
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Abstract
The invention relates to a high-performance novel television-computer integrated machine, which comprises a mainboard, a power supply module, a computer function module and a television function module, wherein the computer function module and the television function module are integrated on the mainboard; the computer function module comprises a south-north bridge core group; the television function module comprises a CPU main control unit, a CA interface unit, a PS2 interface circuit and an infrared receiving unit; and the infrared receiving unit, the CA interface unit and the PS2 interface circuit are all connected with the CPU main control unit. The high-performance novel television-computer integrated machine has the advantages of small size and light weight, compact structure, energy saving, no noise and long service life, supports modes, such as standby, dormancy to a hard disk, dormancy to a memory and the like and integrates the television function module and the computer function module into one mainboard, and therefore fussy connection wires between the television function module and the computer function module are reduced; in addition, the television function module and the computer function module are communicated in a convenient and rapid PS2 format; and a main control unit of the television function module is used as a control core, therefore convenient switchover between a television and a computer is achieved through controlling the main control unit by a remote controller.
Description
Technical field
The present invention relates to a kind of television PC, particularly a kind of high-performance novel television-computer integrated machine.
Background technology
Along with computer technology develops rapidly, on market, there is many moneys television PC.All-in-one is that host computer, display, TV etc. are integrated into one, possesses independently computer function and TV functions, can be used for office and domestic environments.These facility have simple operation, rich interface, and line is brief, energy-conserving and environment-protective, the advantages such as low radiation.But user in use, find that existing television PC still exists a lot of deficiencies, has therefore affected further applying of television PC.Integrate, have following shortcoming: 1, product structure design is bad: the cabinet of existing television PC and display Integral design, display bonnet is directly fixed by screw and display, causes maintenance inconvenient.If have loose contact or other defect, effort is taken display bonnet apart.
2, product heat radiation is bad: due to main frame has been focused on display after, cause radiating effect poor, affect the normal work of computer all-in-one machine, element is at high temperature, easily aging, the life-span can shorten; Simultaneously power consumption also high, noise is large.
3, the bad upgrading of circuit: because electronic component is all integrated on mainboard, bad upgrading, structural design need to improve.In existing television PC, there is a kind of LCD driver module to be integrated on mainboard, this mode is just unfavorable for the supporting upgrading of associated drives software and hardware.
4, complex circuit designs: owing to being integrated products, each functional module electronic component density is quite large, poor anti jamming capability, production cost is high.As: having at present a kind of LCD drive plate is independent setting, and it is connected with mainboard by circuit.Although be convenient to upgrading, due to complex circuit designs, part drive plate adopts dual chip control, and not only shared volume is large for it, and also larger comparatively speaking in power consumption, cost is relatively high, is a challenge for reducing all-in-one host machine part cost.And long to drive plate line from mainboard, if interference protection measure is not handled properly, be easy to produce the interference to screen, shine into screen display unclear, impact is normally used.For another example: the LED-backlit constant current plate of television PC is generally direct constant current-supplying at present, the operation of LED serial or parallel connection, its dirigibility is poor, and certain LED fault will affect the normal operation of other LED.For another example: the existing power module being built in computer all-in-one machine, not only volume is larger, and Electro Magnetic Compatibility do not ideal enough.
5, cost performance is not high: due to circuit design and products-hardware structural design imperfection, most computer function plate and television board, the each functional parts of set-top box functionality plate of adopting of existing computer and television integrated machine independently merge formation, but it can only realize the simple switching of function between TV and computer, cannot meet user's diversified demand, therefore cost performance is not high.
Summary of the invention
The object of the present invention is to provide a kind of high-performance novel television-computer integrated machine, to solve, prior art maintenance is inconvenient, not high-technology problem of bad, bad upgrading, complex circuit designs, the cost performance of dispelling the heat.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of high-performance novel television-computer integrated machine, comprise cabinet, telepilot, liquid crystal display, mainboard, also comprise power module, driver module, on described mainboard, be integrated with computer function module and TV functions module, computer function module comprises southern north bridge chipset, TV functions module comprises CPU main control unit, CA interface unit, PS2 interface circuit, infrared receiver, described infrared receiver, CA interface unit, PS2 interface circuit is all connected with CPU main control unit, the PS2 interface circuit of described TV functions module is connected with the southern north bridge chipset in computer function module, infrared receiver receives remote command and is transferred to CPU main control unit, the judgement of CPU main control unit is that TV signal is carried out TV functions module corresponding operating according to instruction, that pcs signal is transferred to computer function resume module by PS2 communication interface circuit,
Described cabinet comprises that rigidity encloses frame, back shroud, rigidity is enclosed frame rear portion and is provided with slot, slot interpolation has cabinet back shroud, in cabinet, be provided with heat abstractor, heat abstractor comprises copper heat dissipation metal post, temperature control circuit, heat-generating electronic elements top on front end face and the mainboard of described copper heat dissipation metal post is by heat conductive silica gel close contact, thermal column surface has multiple bar shaped radiation airs hole vertically, between two wind holes, be provided with radiating fin, thermal column center is provided with fan duct, fan duct is provided with fan electromotor, the position that cabinet back shroud is right against fan duct is provided with louvre, radiating fin rear end face and cabinet back shroud close contact, fan duct entrance extends to the outer also cabinet back shroud of louvre and closely connects,
Described power module comprises PWM control module, output voltage sampling unit, the rectification filtering unit connecting successively, high frequency conversion unit, high-frequency isolation transformer unit, output rectification filter unit, wherein rectification filtering unit is connected with AC power, PWM control module is taking pwm chip as core, the sampling end of described output voltage sampling unit is connected with the output terminal of output rectification filter unit, the feedback end of output voltage sampling unit is connected with pwm chip, the output terminal of pwm chip is connected with the power switch assembly in high frequency conversion unit, output voltage sampling unit is sampled to output end voltage and is fed back to pwm chip, PWM control module output switch frequency signal is to the power switch assembly in high frequency conversion unit, with ratio switching time of regulating power switch module, and then guarantee the Energy Efficiency Ratio in the stable and different loads situation of output voltage,
Described driver module has a main control unit, this main control unit is inputted with signal respectively and is shown that communication control unit, boost control circuit, voltage conversion circuit, signaling conversion circuit, keystroke handling circuit are connected, described signal input and demonstration communication control unit are provided with row's needle socket, and this row's needle socket is realized main control unit with mainboard grafting and is connected with the communication of mainboard; Described signal input and demonstration communication control unit are also connected with VGA/DDC interface, and access is for the VGA signal of computer function display; Described boost control circuit is provided with the splicing interface that boosts being connected with the plate that boosts backlight, and described signaling conversion circuit is provided with the LVDS signal output interface being connected with display screen, and keystroke handling circuit is provided with the screen control button splicing interface being connected with keypad.
As preferably, in described power module, described rectification filtering unit comprises AC/DC current rectifying and wave filtering circuit, also there is an electromagnetic interface filter being connected between AC power and AC/DC current rectifying and wave filtering circuit, electromagnetic interface filter input end is connected with AC power, described electromagnetic interface filter comprises common mode inductance coil T1, T2 and differential mode inductance L2, L3, AC power accesses common mode inductance coil T1 two input ends after capacitance-resistance filter network, common mode inductance coil T1 two output terminals are connected with common mode telefault T2 two input ends after capacitor C X3 filtering, common mode inductance coil T2 two output terminals are through capacitor C X4, after resistance R 3 filtering, be connected with differential mode inductance L2 and differential mode inductance L3 input end respectively, differential mode inductance L2 is connected with a current rectifying and wave filtering circuit with differential mode inductance L3 two output terminals.
As preferably, described capacitance-resistance filter network comprises filter capacitor CX1, CX2, resistance R 1, R2, and wherein filter capacitor CX1, CX2 are connected in common mode inductance coil T1 two input ends after side by side, after resistance R 1, R2 series connection, are connected in common mode inductance coil T1 two input ends; Between described differential mode inductance L2 and differential mode inductance L3 two output terminals, be serially connected with capacitor C 1, C2, the points of common connection ground connection between capacitor C 1, C2.
As preferably, in described power module, its output voltage sampling unit comprises resistance R 14, R12, R15 and reference power supply IC2, optocoupler IC3; Described resistance R 15 is connected with reference power supply IC2 sampling end, reference power supply IC2 output terminal is connected with 2 pin of the pwm chip in PWM control module through moving optocoupler IC3, pwm chip 5 pin are connected with fet gate, and field effect transistor drain electrode is connected with the transformer T101 armature winding in high-frequency isolation transformer unit.
As preferably, described liquid crystal display is taking LED lamp group as backlight, LED lamp group is driven by the constant pressure and flow driving circuit being arranged on mainboard, this constant pressure and flow driving circuit comprises a constant voltage circuit and multiple constant-current drive circuit, described constant voltage drive circuit adopts DC-DC change-over circuit, constant voltage circuit is connected with power module outlet, multiple constant-current drive circuit parallel joins are in constant voltage circuit output terminal, each constant-current drive circuit is connected with a LED lamp group respectively, described constant-current drive circuit comprises constant current control chip ZXLD1350, the pwm signal end that its 3 pin access power module provides, 5 pin connect constant voltage circuit output terminal, 1 pin connects LED lamp group negative pole by inductance, 2 pin ground connection, constant voltage circuit output terminal is also by connecing LED lamp group positive pole after resistance current limliting, 4 pin of constant current control chip ZXLD1350 connect the anodal feedback signal of LED lamp group, between 1 pin and 5 pin, be connected a stabilivolt, after described LED lamp group is connected by multiple LED or multiple LED connects, compose in parallel again.
As preferably, described temperature control circuit is arranged on the thermosensitive probe that is also provided with multiple detection cabinet inside temperature on mainboard, on mainboard, and this thermosensitive probe is connected with temperature control circuit, and temperature control circuit is connected with fan electromotor.
As preferably, described cabinet rigidity is enclosed frame and is provided with louvre, and the fan duct porch of described thermal column is covered with Air Filter.
Cabinet of the present invention adopts frame-type, and cabinet back shroud can directly insert, dismounting, easy for installation, and each module adopts plug connector, the trouble while so greatly having alleviated maintenance and upgrading in a large number.In addition, cabinet adopts noiseless copper heat dissipation metal ducted fan, and this ducted fan and metal chassis are fixed together, and the heat transmitting can be absorbed and derives rapidly from mainboard.Can also, according to the rotating speed of Current Temperatures control fan, in reducing noise, also can extend the life-span of fan simultaneously.
Power module is under full load conditions, and power ratio control switching frequency increases, until encounter sequential capacitor-clamped; And under underloading condition, peak point current reduces, power ratio control switching frequency declines, and has effectively limited the problem of existing power supply adapter noise; In the time of underloading, due to the decline of switching frequency, the loss relevant to switching frequency as power switch pipe output capacitance and door charge loss and the loss of leakage induction reactance also can reduce, also improves the efficiency of Switching Power Supply under underloading condition thereupon.Specially designed electromagnetic interface filter can effectively suppress the common mode interference of high frequency and the differential mode interference of low frequency, can also two-way inhibition electromagnetic interference noise, thus purify electrical network.
Driver module independently arranges.Necessary function module is only set in module, simple circuit, this module can be concentrated on a small size plate, by row's needle socket and mainboard grafting.Also join by other connector and supplementary module, reduce connection line, save space, save wire rod, also can effectively avoid interference, reach good display effect simultaneously.
The size of current that constant pressure and flow driving circuit makes to flow through each LED is consistent as far as possible, ensures the consistance of each LED brightness, colourity, does not affect other lamp group work in the time that indivedual LED of indivedual lamp groups damage.Constant-current circuit adopts low in energy consumption, technology maturation and lower-cost constant current control chip ZXLD1350, can take into account power-efficient and cost simultaneously.
Small and exquisite frivolous, the compact conformation of the present invention, energy-conservation, noiselessness, long service life.Support standby, dormancy to hard disk, dormancy to internal memory isotype.Its functional module by TV and computer is integrated on a mainboard, reduce the loaded down with trivial details line between the two, and two modules are with conveniently PS2 form communication, taking the main control unit of TV functions module as control core, by telepilot control main control unit, allow easy switching between TV and computer.Realized two interface functions that telecomputer is neglected neither, computer can independently use, TV can independent play-out, picture-in-picture function can make telecomputer can see object for appreciation simultaneously.The present invention can be placed on bedroom, parlor or hang on the wall.Integrate all amusements of family, to music, TV, picture-in-picture adjusting, a key remote control, convenient and practical.Product is widely used in the fields such as telecommuting, hotel, amusement and recreation, bank, educational institution, e-book chamber.
Brief description of the drawings
Fig. 1 is skeleton view of the present invention;
Fig. 2 is schematic block circuit diagram of the present invention;
Fig. 3 is a kind of structural representation of cabinet of the present invention;
Fig. 4 is the cut-open view of A-A shown in Fig. 3;
Fig. 5 is the theory diagram of power module of the present invention;
Fig. 6 is the circuit theory diagrams of electromagnetic interface filter shown in Fig. 5;
Fig. 7 is the circuit theory diagrams of the sampling unit of output voltage shown in Fig. 5;
Fig. 8 is the theory diagram of driver module of the present invention;
Fig. 9 is the circuit theory diagrams of the LED lamp group constant pressure and flow driving circuit of liquid crystal display of the present invention;
Figure 10 is the circuit theory diagrams of constant-current drive circuit shown in Fig. 9.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Referring to Fig. 1,2, this energy novel television-computer integrated machine comprises the parts such as cabinet, telepilot, liquid crystal display, power module, driver module, PCB mainboard.On mainboard, be integrated with computer function module and TV functions module, wherein computer function module comprises cpu chip, internal storage location, harddisk memory, southern north bridge chipset, video card unit etc.Each functional circuit can adopt existing ripe configuration, as cpu chip can adopt Intel Pentium Dual Core E5200; Mainboard can adopt Intel G41+ICH7 etc., and video card can adopt Intel GMAX4500.Max.active shared memory512MB etc.
South north bridge chipset is the traditional die group framework of computer main board, South Bridge chip is generally positioned on computer main board the below away from from CPU slot, near of PCI slot, this layout is to consider that the I/O bus that it connects is more, is a little further conducive to wiring from processor.General north bridge chips is responsible for the exchanges data between CPU and internal memory, video card, and data processing amount is large, needs configuration heat radiator.South Bridge chip is generally responsible for the communication between I/O bus, and as the interface circuits such as pci bus, USB, LAN, ATA, SATA, Audio Controller, keyboard controller, real-time clock controller, Advanced Program Zoom etc., it does not generally cover heat radiator; South Bridge chip is not directly connected with processor, but is connected with north bridge chips by certain mode.
TV functions module comprises CPU main control unit, CA interface unit, PS2 interface circuit, infrared receiver, tuning demodulator (QAM) etc., described infrared receiver, CA interface unit, PS2 interface circuit, tuning demodulator are all connected with main control unit, and tuning demodulator is connected with TV signal input interface.Infrared receiver receives remote command and is transferred to CPU main control unit, and CPU main control unit is connected with PS2 interface circuit, and PS2 interface circuit is connected with the southern north bridge chipset in computer function module.PS2 communications protocol is a kind of bi-directional synchronization serial communication protocol.The two ends of communication are by Clock(clock pin) synchronous, and by Data(data pin) swap data.
Infrared receiver comprises integrated infrared receiving terminal (IR001), AT89S52 single-chip microcomputer, the infrared reception collection of integrated red external connector collection is enlarged into one, directly be connected with an I/O mouth of AT89S52 single-chip microcomputer, AT89S52 single-chip microcomputer is connected with CPU main control unit.Telepilot adopts TC9012F chip, and TC9012F chip is connected with LED infrared emission head.Telepilot can freely be changed computer and TV functions, and integrated electro computer mouse, possesses computer mouse function simultaneously.
CPU main control unit adopts special embedded type CPU chip, and alternative this chip is a lot of at present.As chips such as the STi5197 of STMicw Electronics, STi7105, QAMi5516, the sc2005 chip of LSI Logic company, the chips such as the HD3101 of Shanghai high definition.Some CPU embedded chips are also directly integrated with numerous functional circuits such as qam demodulator, as the STi5197 of STMicw Electronics just comprises a QAM(quadrature amplitude modulation) detuner, and MPEG-2 audio/video decoding and application program processing capacity.Telepilot by command to CPU main control unit after, CPU main control unit judgement is that TV signal is carried out TV functions module corresponding operating according to instruction, is that pcs signal is transferred to computer function resume module by PS2 communication interface circuit.
Shown in Fig. 3,4, described cabinet 1 comprises that rigidity encloses frame 11, and rigidity is enclosed frame 11 and is provided with louvre 110, and rigidity is enclosed frame 11 rear portions and is provided with and in slot 2, slot 2, is inserted with aluminium cabinet back shroud 21.In cabinet, be provided with some heat abstractors (arranging 1 to 3 according to actual conditions), heat abstractor comprises copper heat dissipation metal post 31, temperature control circuit (arranging on mainboard).
Heat-generating electronic elements 3(on mainboard is as cpu chip etc.) top by heat conductive silica gel 32 the front end face close contact with copper heat dissipation metal post 31, thermal column 31 surfaces have multiple bar shaped radiation airs hole 4 vertically, between two wind holes, be provided with radiating fin 41, thermal column 31 centers are provided with fan duct 6, fan duct 6 is provided with fan electromotor 5, radiating fin 41 rear end faces and cabinet back shroud 21 close contacts, the position that cabinet back shroud 21 is right against fan duct 6 is provided with louvre 23, radiating fin rear end face and cabinet back shroud close contact, fan duct entrance extends to outside louvre, closely be connected with cabinet back shroud 21 by screw, be covered with loose Air Filter 22 in fan duct porch.Referring to Fig. 2, on mainboard, be also provided with the thermosensitive probe of multiple detection cabinet inside temperature, thermosensitive probe is connected with temperature control circuit, and temperature control circuit is connected with fan electromotor.
Power module as shown in Figure 5; it comprises AC power, PWM control module, output voltage sampling unit, successively the rectification filtering unit of connection, high frequency conversion unit, high-frequency isolation transformer unit, output rectification filter unit, over-current protecting unit, overvoltage crowbar etc.Output voltage sampling unit is mainly made up of comparator circuit, amplifying circuit.The sampling end of comparator circuit is connected with the output terminal of output rectification filter unit, and the feedback end of output voltage sampling unit is connected with PWM control module.After comparator circuit in output voltage sampling unit is sampled to output end voltage, send amplifying circuit amplify and its sampled signal is fed back to PWM control module.
Rectification filtering unit comprises AC/DC current rectifying and wave filtering circuit, electromagnetic interface filter.The input end of electromagnetic interface filter is connected with the output terminal of AC power, and the output terminal of electromagnetic interface filter is connected with AC/DC current rectifying and wave filtering circuit, and AC/DC rectification filter circuit output end is connected with high frequency conversion unit.Electromagnetic interface filter can suppress the noise of full frequency-domain simultaneously, makes the zero-decrement power-supply device that is transferred to of alternating current, can effectively suppress again the noise that power supply itself produces simultaneously, improves the Electro Magnetic Compatibility of power supply itself.
As shown in Figure 6, electromagnetic interface filter comprises common mode inductance coil T1, T2, resistance R 1, R2, R3, capacitor C X1, CX2, CX3, C1, C2, differential mode inductance L2, L3, capacitor C X4.Wherein filter capacitor CX1, CX2 are connected in common mode inductance coil T1 two input ends after side by side, after resistance R 1, R2 series connection, are connected in common mode inductance coil T1 two input ends.The two-terminal of AC power is through capacitor C X1, CX2, after the capacitance-resistance filter network filtering that resistance R 1, R2 form, be connected with common mode telefault T1 two input ends respectively, common mode inductance coil T1 two output terminals are connected with common mode telefault T2 two input ends after capacitor C X3 filtering, common mode inductance coil T2 two output terminals are connected with differential mode inductance L2 and differential mode inductance L3 input end respectively after capacitor C X4, resistance R 3 filtering, between differential mode inductance L2 and differential mode inductance L3 two output terminals, be serially connected with capacitor C 1, C2, the points of common connection ground connection between capacitor C 1, C2.Differential mode inductance L2 is connected with AC/DC current rectifying and wave filtering circuit with differential mode inductance L3 two output terminals.
Resistance R 1, R2, R3 and capacitor C X1, CX2, CX3, C1, C2, form and exchange the low-pass filter between separate port on inlet wire, and the common mode interference noise on can damped alternating current inlet wire, stops it to enter power-supply device; And differential mode inductance L2, L3 and capacitor C X4 form differential mode noise inhibition circuit, form and exchange the low-pass filter between separate port on inlet wire, can suppress to exchange the differential mode interference noise on inlet wire, prevent that power-supply device is interfered.
The core of high frequency conversion unit is a high frequency power switch module, as switching transistor or field effect transistor (MOSFET).High frequency conversion unit produces high frequency (more than 20KHZ) high-voltage square-wave, the high-voltage square-wave obtaining is given the elementary of high-frequency isolation transformer unit, go out voltage at the secondary induction of isolating transformer, this voltage has become low-voltage DC after being rectified filtering.
PWM control module is taking pwm chip as core, and the output terminal of pwm chip is connected with the power switch assembly in high frequency conversion unit.PWM control module is mainly used in regulation output voltage, make in the time that input AC changes with output DC load, it is stable that output voltage can keep, operation is that pwm circuit is sampled by output voltage, and a result feedback of sampling is to control circuit, control circuit is made comparisons it and reference voltage, controls ratio switching time (dutycycle) of high frequency power switch module according to comparative result, and then guarantees the Energy Efficiency Ratio in the stable and different loads situation of output voltage.For whole circuit safety is worked reliably, the auxiliary circuit such as overvoltage, current foldback circuit must be set.
As shown in Figure 7, while specifically enforcement, output voltage sampling unit is mainly made up of comparator circuit (further comprising resistance R 14, R12, R15, R1 etc.), amplifying circuit (further comprising reference power supply IC2, optocoupler IC3 etc.).Wherein resistance R 15 is connected with reference power supply IC2 sampling end, reference power supply IC2 output terminal is connected with 2 pin of the pwm chip in PWM control module through moving optocoupler IC3, output terminal 5 pin of pwm chip are connected with fet gate, and field effect transistor drain electrode is connected with the transformer T101 armature winding in high-frequency isolation transformer unit.In the time that output voltage raises, resistance R 15 in comparator circuit powers on and presses liter, the reference power supply IC2 of this sampling voltage signal in amplifying circuit amplifies rear drive optocoupler IC3 output, and then make the control chip in PWM control module (can select TL3842, RT9214 RT9173CS, the octal pwm chips such as CPAB1377BP) the 2 pin voltage drops of IC1A, pwm chip control field effect transistor output LOW voltage reduces the transformer T101 armature winding stored energy in high-frequency isolation transformer unit, transformer T101 secondary coil voltage declines and output voltage is declined, otherwise when output voltage reduces.
Over-current protecting unit is connected with high frequency conversion unit, comprises resistance 7RA, 7RB, 7RC, is suppressed resistance R 6 and be connected to 3 pin of pwm chip after described resistance 7RA, 7RB, 7RC parallel connection by peak point current.Trigger the protection of control chip IC1A internal over-current when the excessive voltage on resistance 7RA, 7RB, 7RC of output current exceedes setting voltage, control chip IC1A5 pin output low level power ratio control switching tube turn-offs.
Overvoltage crowbar comprises the auxiliary winding N3 of transformer T101, the auxiliary winding N3 induction output winding voltage of transformer T101, and this output winding voltage is delivered to 1 pin of pwm chip after resistance R 8, R5 dividing potential drop.This circuit is by the auxiliary winding induction of the transformer in high-frequency isolation transformer unit output winding voltage, this output winding voltage is delivered to the control chip of PWM control module after electric resistance partial pressure, in the time that dividing point voltage exceedes setting value, the output of control chip shutdown switch pulse voltage, while control chip supply pin voltage also reduces realizes power module locking.
As shown in Figure 8, driver module comprises main control unit and the signal input that is connected with main control unit and show communication control unit, boost control circuit, signaling conversion circuit, voltage conversion circuit, keystroke handling circuit.In addition, driver module is also provided with the program updates interface that software content in main control unit is carried out to burning renewal.Above-mentioned driver module independently arranges on a platelet, the functional module of integrated necessity only in module, and some supplementary modules are all arranged on the mainboard of television PC, be connected with driver module plate by connector, can greatly reduce like this overall dimensions of driver module plate.
Main control unit comprises core cpu control chip, it is inputted with signal respectively and shows that communication control unit, signaling conversion circuit, keystroke handling circuit, voltage conversion circuit are connected, signal input and demonstration communication control unit are provided with row's needle socket, the mainboard of this row's needle socket and television PC is pegged graft, realize main control unit and be connected with the communication of television PC mainboard, monoblock drive circuit board can be taken off easily and tests and upgrade.
Signal input and demonstration communication control unit are subject to master control unit controls, receive computer and TV functions display and process, and realize main control unit and are connected with the communication of television PC mainboard.
Wherein signal input and demonstration communication control unit are connected with VGA/DDC interface, and access is for the VGA signal of computer function display.Signaling conversion circuit is provided with the LVDS signal output interface being connected with display screen, is subject to master control unit controls that display conversion is exported to display screen.Voltage conversion circuit is powered into display screen after extraneous direct supply is changed; Keystroke handling circuit is provided with the screen control button splicing interface of pegging graft with keypad, therefore can process keypad input signal, realizes show state adjustment by main control unit control.
As shown in Figure 9, the backlight screen of liquid crystal display is taking LED lamp group as backlight, LED lamp group is driven by the constant pressure and flow driving circuit being arranged on mainboard, circuit comprises a constant voltage circuit and multiple constant-current drive circuit, multiple constant-current drive circuit parallel joins are in constant voltage circuit output terminal, and each constant-current drive circuit is connected with a LED lamp group respectively.Wherein, constant voltage circuit adopts DC-DC change-over circuit, this DC-DC change-over circuit adopts DC voltage conversion chip BIT3251, its input end is connected with DC output end VCC, the GND terminal of power module, and the direct supply of power module is powered to DC-DC conversion chip BIT3251 by triode Q2 after capacitor C 3 and C2 filtering.Conducting by inductance L 1 energy storage and pulse-width controlled triode Q4 cut-off reaches the conversion object of DC-DC again, and DC-DC change-over circuit output terminal can be stablized after by schottky diode D1 rectification and capacitor C 7 filtering, low ripple, low noise DC voltage.Resistance R 9 and R10 sample to output voltage, and in the time that input voltage or load change, output voltage changes thereupon, and BIT3251 will regulate dutycycle according to sampled result, reaches the object of regulated output voltage.
Wherein, constant-current drive circuit as shown in figure 10, each constant-current drive circuit comprises constant current control chip ZXLD1350, the pwm signal end that its 3 pin access power module provides, 5 pin connect constant voltage circuit output end vo ut-in, and 1 pin connects LED lamp group negative pole by inductance, 2 pin ground connection, constant voltage circuit output terminal is also by connecing LED lamp group positive pole after resistance current limliting, and 4 pin of constant current control chip connect the anodal feedback signal of LED lamp group, between 1 pin and 5 pin, are connected a stabilivolt.LED lamp group composes in parallel after being connected or connected by multiple LED again.ZXLD1350 is a buck regulator being derived by controllable current source, and this device can be used to drive high-power, the high brightness light emitting diode lamp group of series connection.The acceptable wide input voltage range of this control chip, (DC12-30V), as long as the combination feed-forward voltage of LED array is no more than 30V, this circuit just can keep the adjusting electric current in the LED of any amount constant, and the while can also be carried out light modulation to LED array by PWM pulse-width signal.
Claims (6)
1. a high-performance novel television-computer integrated machine, comprise cabinet, telepilot, liquid crystal display, mainboard, it is characterized in that also comprising power module, driver module, on described mainboard, be integrated with computer function module and TV functions module, computer function module comprises southern north bridge chipset, TV functions module comprises CPU main control unit, CA interface unit, PS2 interface circuit, infrared receiver, described infrared receiver, CA interface unit, PS2 interface circuit is all connected with CPU main control unit, the PS2 interface circuit of described TV functions module is connected with the southern north bridge chipset in computer function module, infrared receiver receives remote command and is transferred to CPU main control unit, the judgement of CPU main control unit is that TV signal is carried out TV functions module corresponding operating according to instruction, that pcs signal is transferred to computer function resume module by PS2 communication interface circuit,
Described cabinet comprises that rigidity encloses frame, back shroud, rigidity is enclosed frame rear portion and is provided with slot, slot interpolation has cabinet back shroud, in cabinet, be provided with heat abstractor, heat abstractor comprises copper heat dissipation metal post, temperature control circuit, heat-generating electronic elements top on front end face and the mainboard of described copper heat dissipation metal post is by heat conductive silica gel close contact, thermal column surface has multiple bar shaped radiation airs hole vertically, between two wind holes, be provided with radiating fin, thermal column center is provided with fan duct, fan duct is provided with fan electromotor, the position that cabinet back shroud is right against fan duct is provided with louvre, radiating fin rear end face and cabinet back shroud close contact, fan duct entrance extends to outside louvre and is closely connected with cabinet back shroud, be covered with Air Filter in fan duct porch,
Described power module comprises PWM control module, output voltage sampling unit, the rectification filtering unit connecting successively, high frequency conversion unit, high-frequency isolation transformer unit, output rectification filter unit, wherein rectification filtering unit is connected with AC power, PWM control module is taking pwm chip as core, the sampling end of described output voltage sampling unit is connected with the output terminal of output rectification filter unit, the feedback end of output voltage sampling unit is connected with pwm chip, the output terminal of pwm chip is connected with the power switch assembly in high frequency conversion unit, output voltage sampling unit is sampled to output end voltage and is fed back to pwm chip, PWM control module output switch frequency signal is to the power switch assembly in high frequency conversion unit, with ratio switching time of regulating power switch module, and then guarantee the Energy Efficiency Ratio in the stable and different loads situation of output voltage,
Signal input and demonstration communication control unit that described driver module comprises main control unit and is connected with main control unit, boost control circuit, signaling conversion circuit, voltage conversion circuit, keystroke handling circuit, main control unit comprises core cpu control chip, it is inputted with signal respectively and demonstration communication control unit, signaling conversion circuit, keystroke handling circuit, voltage conversion circuit connects, signal input and demonstration communication control unit are provided with row's needle socket, the mainboard of this row's needle socket and television PC is pegged graft, realizing main control unit is connected with the communication of television PC mainboard, described signal input and demonstration communication control unit are also connected with VGA/DDC interface, access is for the VGA signal of computer function display, signal input and demonstration communication control unit are subject to master control unit controls, receive computer and TV functions display and process, realizing main control unit is connected with the communication of television PC mainboard, signaling conversion circuit is provided with the LVDS signal output interface being connected with liquid crystal display panels, be subject to master control unit controls that display conversion is exported to liquid crystal display panels, voltage conversion circuit is powered into display screen after extraneous direct supply is changed, described boost control circuit is provided with the splicing interface that boosts being connected with the plate that boosts backlight, and keystroke handling circuit is provided with the screen control button splicing interface being connected with keypad, realizes show state adjustment by main control unit control.
2. high-performance novel television-computer integrated machine according to claim 1, it is characterized in that in described power module, described rectification filtering unit comprises AC/DC current rectifying and wave filtering circuit, also there is an electromagnetic interface filter being connected between AC power and AC/DC current rectifying and wave filtering circuit, electromagnetic interface filter input end is connected with AC power, described electromagnetic interface filter comprises common mode inductance coil T1, T2 and differential mode inductance L2, L3, AC power accesses common mode inductance coil T1 two input ends after capacitance-resistance filter network, common mode inductance coil T1 two output terminals are connected with common mode telefault T2 two input ends after capacitor C X3 filtering, common mode inductance coil T2 two output terminals are through capacitor C X4, after resistance R 3 filtering, be connected with differential mode inductance L2 and differential mode inductance L3 input end respectively, differential mode inductance L2 is connected with AC/DC current rectifying and wave filtering circuit with differential mode inductance L3 two output terminals.
3. high-performance novel television-computer integrated machine according to claim 2, it is characterized in that described capacitance-resistance filter network comprises filter capacitor CX1, CX2, resistance R 1, R2, wherein filter capacitor CX1, CX2 are connected in common mode inductance coil T1 two input ends after side by side, after resistance R 1, R2 series connection, are connected in common mode inductance coil T1 two input ends; Between described differential mode inductance L2 and differential mode inductance L3 two output terminals, be serially connected with capacitor C 1, C2, the points of common connection ground connection between capacitor C 1, C2.
4. high-performance novel television-computer integrated machine according to claim 1, is characterized in that in described power module, its output voltage sampling unit comprises resistance R 14, R12, R15 and reference power supply IC2, optocoupler IC3, described resistance R 15 is connected with reference power supply IC2 sampling end, reference power supply IC2 output terminal is connected with 2 pin of the pwm chip in PWM control module through moving optocoupler IC3, pwm chip 5 pin are connected with high frequency power switch module fet gate, field effect transistor drain electrode is connected with the transformer T101 armature winding in high-frequency isolation transformer unit, in the time that output voltage raises, resistance R 15 in comparator circuit powers on and presses liter, the reference power supply IC2 of this sampling voltage signal in amplifying circuit amplifies rear drive optocoupler IC3 output, and then make 2 pin voltage drops of pwm chip, pwm chip control field effect transistor output LOW voltage reduces the transformer T101 armature winding stored energy in high-frequency isolation transformer unit, transformer T101 secondary coil voltage declines and output voltage is declined, otherwise when output voltage reduces.
5. high-performance novel television-computer integrated machine according to claim 1, it is characterized in that described liquid crystal display is taking LED lamp group as backlight, LED lamp group is driven by a constant pressure and flow driving circuit, this constant pressure and flow driving circuit comprises a constant voltage circuit and multiple constant-current drive circuit, described constant voltage drive circuit adopts DC-DC change-over circuit, constant voltage circuit is connected with power module outlet, multiple constant-current drive circuit parallel joins are in constant voltage circuit output terminal, each constant-current drive circuit is connected with a LED lamp group respectively, described constant-current drive circuit comprises constant current control chip ZXLD1350, the pwm signal end that its 3 pin access power module provides, 5 pin connect constant voltage circuit output terminal, 1 pin connects LED lamp group negative pole by inductance, 2 pin ground connection, constant voltage circuit output terminal is also by connecing LED lamp group positive pole after resistance current limliting, 4 pin of constant current control chip ZXLD1350 connect the anodal feedback signal of LED lamp group, between 1 pin and 5 pin, be connected a stabilivolt, after described LED lamp group is connected by multiple LED or multiple LED connects, compose in parallel again.
6. high-performance novel television-computer integrated machine according to claim 1, it is characterized in that described temperature control circuit is arranged on the thermosensitive probe that is also provided with multiple detection cabinet inside temperature on mainboard, on mainboard, this thermosensitive probe is connected with temperature control circuit, and temperature control circuit is connected with fan electromotor.
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| CN105872421A (en) * | 2016-04-19 | 2016-08-17 | 康佳集团股份有限公司 | Television with concealed infrared remote control device |
| CN107454816A (en) * | 2017-08-04 | 2017-12-08 | 郑州云海信息技术有限公司 | A kind of line system for reducing preposition VGA cable interference |
| CN113950297B (en) * | 2019-06-05 | 2024-05-03 | 奥林巴斯株式会社 | Driving device |
| CN113946307A (en) * | 2021-10-22 | 2022-01-18 | 广州禹龙信息科技有限公司 | Embedded cloud all-in-one convenient to maintain |
| CN114374865A (en) * | 2022-01-04 | 2022-04-19 | 珠海市金品创业共享平台科技有限公司 | Television remote controller and signal switching circuit thereof |
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