CN109688355A - A kind of display screen discharge control device of OLED TV - Google Patents
A kind of display screen discharge control device of OLED TV Download PDFInfo
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- CN109688355A CN109688355A CN201811615553.2A CN201811615553A CN109688355A CN 109688355 A CN109688355 A CN 109688355A CN 201811615553 A CN201811615553 A CN 201811615553A CN 109688355 A CN109688355 A CN 109688355A
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- 238000001514 detection method Methods 0.000 claims abstract description 63
- 238000012790 confirmation Methods 0.000 claims description 11
- 238000007689 inspection Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 27
- 238000003860 storage Methods 0.000 description 22
- 239000003990 capacitor Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 17
- 230000002618 waking effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
-
- 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
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4432—Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server
-
- 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
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4436—Power management, e.g. shutting down unused components of the receiver
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- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a kind of display screen discharge control devices of OLED TV, can not control OLED display screen electric discharge under several scenes in the prior art to solve the problems, such as.Described device includes first detection module and the first control module, wherein: the first detection module is separately connected the power module, main chip module connection and the first control module, for receive the power module AC dump the first input signal or the main chip module DC dump the second input signal when, export first control signal；First control module connects the screen driver module, when for receiving the first control signal of the first detection module output, controls the screen driver module electric discharge.
Description
Technical field
The invention mainly relates to a kind of display screen control of discharge of OLED TV technology more particularly to OLED TV dresses
It sets.
Background technique
OLED (Organic Light-Emitting Diode) is color representation ability, right in large screen television field
Than core index such as degree, response speed, visual angles almost without opponent, current OLED Polarizations for Target Discrimination in Clutter is rapidly abnormal, but the face OLED
Plate power supply includes screen logic control power supply and screen display driving power supply, since the electric discharge of screen display driver circuit is than screen logic control electricity
Road electric discharge is slow, discharges if controlling them simultaneously, it may appear that screen logic control circuit has discharged, but shields display driver circuit also
The case where not discharging will lead to screen display in this way and show existing ghost, or even can burn-in.
The prior art is mostly used when solving this problem in power unit addition storage capacitor, and storage capacitor energy
Maintaining the ARM core of control system operation has the time of electricity very of short duration, therefore ARM core can not notify screen display driving electric discharge, can only
The timing of screen electric discharge, prevents the generation of ghost when notifying screen display driving that electric discharge is rapidly to guarantee AC dump by power supply.
But due to the electric discharge of storage capacitor, it can make the T8032 chip waken up for television standby after AC dump, still maintain one
There is electricity in the section time, and system does not walk normal Standby process, and T8032 chip is not aware that machine is standby, causes in T8032 core
Piece had in this period of electricity, the electrifying timing sequence disorder of system, even if exchange powers on again, can not also wake up system.And electricity
Depending in the case where upgrading, factory reset, going out the several scenes such as error protection, PVR recording, it is also desirable to it discharges to screen display driving, this
When system ARM core be then notified that screen display driving electric discharge, and since AC dump, power supply are not regarded as to need to screen display
Show driving electric discharge, it will cause screen electric discharge timing disorders at this time, therefore at present can not be under several scenes and at the same time compatible hand over
Notice screen display driving electric discharge rapidly when stream power-off, to can not also prevent the generation of ghost.
Summary of the invention
The embodiment of the invention provides a kind of display screen discharge control devices of OLED TV, to solve in the prior art
The problem of OLED display screen electric discharge can not be controlled under several scenes.
The embodiment of the invention provides a kind of display screen discharge control device of OLED TV, the display screen control of discharge
Device includes power module, main chip module, screen Logic control module and screen driver module, the display screen control of discharge
Device further includes first detection module and the first control module, in which:
The first detection module is separately connected the power module, main chip module connection and the first control mould
Block, for receive the power module AC dump the first input signal or the main chip module DC dump second
When input signal, first control signal is exported；
First control module connects the screen driver module, for receiving the first detection module output
First control signal when, control screen driver module electric discharge.
Further, described device further includes the second detection module and the second control module, in which:
Second detection module is separately connected the power module, the main chip module and the second control module, uses
In the third input that the first input signal and the main chip module direct current that receive the power module AC dump power on
When signal, second control signal is exported；
Second control module is separately connected the power module and the main chip module, for receiving described
When the second control signal of two detection modules output, the main chip module power-off is controlled.
Further, the main chip module includes the system core module and standby wakeup module interconnected, in which:
The system core module wakes up information, operation starting for receiving the standby wakeup module is sent first
Program, when running to the setting section of the startup program, Xiang Suoshu standby wakeup module sends the first confirmation message；
The standby wakeup module, for when receiving standby wakeup signal, Xiang Suoshu system core module sends the
One wakes up information, and opening timing device, judges the system core module whether is received in the timing length of the timer
The first confirmation message sent, if it is not, then exporting the third input signal that the main chip module direct current powers on.
Further, second detection module includes logic inverter and logic NAND gate, in which:
The input terminal of the logic inverter is connect with the power module, and the input terminal of output end and logic NAND gate connects
It connects；
Another input terminal of the logic NAND gate is connect with main chip module, and output end and second control module connect
It connects.
Further, second control module includes second switch:
The second switch is separately connected the output end, the power module and the standby wakeup of the logic NAND gate
Module.
Further, the first detection module includes logical AND gate:
The input terminal of the logical AND gate is connect with the power module, and another input terminal and the main chip module connect
It connects, output end is connect with the first control module.
Further, first control module includes first switch:
The first switch is separately connected screen driver module and ground terminal.
The embodiment of the invention provides a kind of display screen discharge control device of OLED TV, described device includes the first inspection
Survey module and the first control module, in which: the first detection module is separately connected the power module, the main chip module
Connection and the first control module, for receive the power module AC dump the first input signal or the master chip mould
When the second input signal of block DC dump, first control signal is exported；First control module connects the screen display and drives
Dynamic model block controls the screen driver module when for receiving the first control signal of the first detection module output
Electric discharge.The device receives the signal of power module and main chip module output by first detection module respectively, if received
First input signal of power module AC dump or the second input signal of main chip module DC dump then pass through the first control
Molding block carrys out the electric discharge of control flow driver module, as long as thereby may be ensured that power module AC dump or main chip module
DC dump can make drive module discharge, and then the generation of ghost can be prevented under any scene.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of the display screen discharge control device of OLED TV provided in an embodiment of the present invention；
Fig. 2 is that the process signal of false wake-up problem occurs in AC dump after TV direct current provided in an embodiment of the present invention is standby
Figure；
Fig. 3 is the interaction provided in an embodiment of the present invention when solving the problems, such as false wake-up between T8032 chip and ARM chip
Process；
Fig. 4 is the electrical block diagram of the display screen discharge control device of OLED TV provided in an embodiment of the present invention；
OLED module powers on flow chart when Fig. 5 is TV normal boot-strap provided in an embodiment of the present invention；
The electrifying timing sequence figure of OLED module when Fig. 6 is TV normal boot-strap provided in an embodiment of the present invention；
The discharge flow path figure of OLED module when Fig. 7 is TV direct current normal Standby provided in an embodiment of the present invention；
The realization of OLED screen driver module is quickly put when Fig. 8 is television startup AC dump provided in an embodiment of the present invention
The flow chart of electricity.
Specific embodiment
The present invention will be describe below in further detail with reference to the accompanying drawings, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
All other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment 1:
For OLED in large screen television field, the core index such as color representation ability, contrast, response speed, visual angle are several
There is no opponent, therefore OLED Polarizations for Target Discrimination in Clutter is extremely rapid.But OLED television panels power supply when, screen Logic control module and
It is separated for shielding driver module, wherein screen Logic control module is responsible for parsing the vision signal that main chip module is sent, control
The display of system screen driver module, and shield particularity of the driver module because of OLED screen, its electric discharge can very after power-off
Slowly, so if controlling the two power down simultaneously, it may appear that screen Logic control module power down, and shield driver module also not
The case where power down, will lead to OLED screen at this time and ghost occurs, out of hand additionally, due to OLED screen, and the certain probability of meeting causes to burn
Screen.When preventing ghost from occurring, frequently with the method for introducing storage capacitor in power end, and storage capacitor can maintain the prior art
ARM core has the time of electricity very of short duration, therefore ARM core can not notify screen display driving electric discharge, can only notify screen display by power supply
The timing of screen electric discharge, prevents the generation of ghost when showing the rapid electric discharge of driving to guarantee AC dump.Although this method can be
Guarantee that screen driver module first discharges to prevent the generation of ghost when AC dump, but in TV upgrading, recovery factory
Setting goes out under the several scenes such as error protection, it is also desirable to give screen display driving electric discharge, system is then notified that screen display driving is put at this time
Electricity, and since AC dump, power supply are not regarded as that needs drive to screen display and discharge that it will cause shield timing of discharging at this time
Disorder, therefore can not show that driving is discharged rapidly and at the same time notifying to shield when compatible with alternating powers off under several scenes at present, from
And it can not also prevent the generation of ghost.
In order to solve technical problem mentioned above, a kind of display screen of OLED TV is proposed in embodiments of the present invention
Discharge control device, as shown in Figure 1, the device include power module 101, main chip module 102, screen Logic control module 103,
Shield driver module 104, first detection module 105 and the first control module 106 wherein:
The first detection module 105 is separately connected the power module 101, the connection of the main chip module 102 and the
One control module 106, the first input signal or the main chip module for receiving the power module AC dump are straight
When flowing the second input signal of power-off, first control signal is exported；
First control module connects the screen driver module, for receiving the first detection module output
First control signal when, control screen driver module electric discharge.
The display screen discharge control device of OLED TV according to figure 1, due to first detection module respectively with power supply
Module is connected with main chip module, so the first detection module both can receive power module exchange and power on or AC dump
Signal also can receive main chip module direct current and power on or the signal of DC dump, and receiving a certain specified signal
When just export corresponding control signal.
Specifically, when first detection module receives the first input signal of power module AC dump, or receive
When the second input signal of main chip module DC dump, which will export first control signal, this first
Control signal is the signal for making the first control module control flow driver module discharge；First control module receive this first
When controlling signal, the electric discharge of control flow driver module.
In the embodiment of the present invention, which receives power module and main chip module output by first detection module respectively
Signal, if receive power module AC dump the first input signal or main chip module DC dump second input
Signal, then by the first control module come the electric discharge of control flow driver module, as long as thereby may be ensured that power module exchanges
Power-off or main chip module DC dump can make drive module discharge, and then the hair of ghost can be prevented under any scene
It is raw.
Embodiment 2:
In order to solve introduce storage capacitor bring booting AC dump when, can not storage capacitor discharge during again on
Electricity wakes up the problem of TV, on the basis of the above embodiments, in embodiments of the present invention, as shown in Figure 1, described device is also wrapped
Include the second detection module 107 and the second control module 108, in which:
Second detection module 107 is separately connected the power module 101, the main chip module 102 and the second control
Molding block 108, for receive the power module AC dump the first input signal and the main chip module direct current
When the third input signal of electricity, second control signal is exported；
Second control module is separately connected the power module and the main chip module, for receiving described
When the second control signal of two detection modules output, the main chip module power-off is controlled.
Storage capacitor is introduced in power end, on the one hand solves the problems, such as that ghost occurs in booting AC dump display screen, but
On the other hand cause after AC dump again, it is necessary to wait a few minutes, after being discharged to storage capacitor, could exchange again
Otherwise electricity will appear the case where can not waking up.Due to increasing storage capacitor, after AC dump, system still can be maintained
There is electricity in a period of time.Make still to be able to maintain when having electricity of 2min for waking up the T8032 chip of TV in main chip module at this time
Between, but system does not walk normal standby process, and T8032 chip is caused to be not aware that machine is standby, and if at this
Exchange powers on again in period, and T8032 chip can't go detection wake source, the case where can not waking up so as to cause machine.
The problem of being mentioned based on above content provides the second detection module and the second control mould in embodiments of the present invention
Block.Second detection module is connect with power module, main chip module and the second control module respectively, therefore the second detection mould
Block, which both can receive power module exchange and power on the perhaps signal of AC dump or can receive main chip module direct current, to be powered on or directly
The signal of power-off is flowed, and corresponding control signal can be exported when receiving specified signal.
Specifically, if second detection module receives the first input signal and the master of power module AC dump simultaneously
The third input signal that chip module direct current powers on, then can export second control signal.The second control signal is control second
Control module is the signal of main chip module power-off, when the second control module receives the second control signal, controls main core
The power-off of piece module.
In the embodiment of the present invention, which receives power module and main chip module output by the second detection module respectively
Signal, if receiving the first input signal of power module AC dump simultaneously and third that main chip module direct current powers on
Input signal then controls main chip module power-off by the second control module, solves in AC dump, system still has
Electricity and the case where can not wake up.The device is by being restored to system to main chip module power-off when storage capacitor discharges
Original state, and then when exchange powers on again, machine can normally start.
Embodiment 3:
In order to solve the false wake-up of appearance after standby AC dump, so as to cause can not really wake up TV within certain time
The problem of, on the basis of the various embodiments described above, in embodiments of the present invention, the main chip module include interconnect be
System nucleus module and standby wakeup module, in which:
The system core module wakes up information, operation starting for receiving the standby wakeup module is sent first
Program, when running to the setting section of the startup program, Xiang Suoshu standby wakeup module sends the first confirmation message；
The standby wakeup module, for when receiving standby wakeup signal, Xiang Suoshu system core module sends the
One wakes up information, and opening timing device, judges the system core module whether is received in the timing length of the timer
The first confirmation message sent, if it is not, then exporting the third input signal that the main chip module direct current powers on.
Common, TV main chip module includes the system core module and standby wakeup module interconnected.The system
Nucleus module includes the ARM chip for maintaining system operation after being switched on, when which includes for standby operation,
Detect the T8032 chip that ARM is waken up after waking up instruction.
It, can not be during storage capacitor discharges again when in order to solve above-mentioned introducing storage capacitor bring booting AC dump
It is secondary to power on the problem of waking up TV, the second detection module and the second control module are provided in this programme.But but cause in this way
There is false the case where waking up in AC dump again after direct current is standby.Under normal DC ideal case, power module and master chip mould
Block is in off-position, at this time first input of second detection module due to that cannot receive power module AC dump simultaneously
The third input signal that signal and main chip module direct current power on, to be unable to control main chip module power-off, therefore at this time
Inside main chip module for waking up the T8032 chip of TV still normal power supply.
If AC dump at this time, and just someone has accidentally touched the wake-up key of TV remote at this time, due to storage
Can capacitor electric discharge so that T8032 chip has electricity, ARM core also has electricity, therefore TV is waken up, but due to ARM core than
T8032 chip power-down is fast, and ARM core can then stop because of electricity shortage and directly at this time, and T8032 chip still has electricity and recognizes
It has been waken up for TV, will lead to if exchange at this time powers on and occur the case where can not waking up again.When specifically direct current is standby
The power supply process of AC dump, entire TV operating system is as shown in Figure 2.
Under normal circumstances, when standby into direct current, power end exchanges upper power detection signal AC_DET and can be pulled low TV
For low level, direct current booting detection signal DC_DET default is also low level, at this time T8032 normal power supply.If this when hands over
Stream power-off, AC_DET and DC_DET remain as low level, i.e., what the second detection module received is DC dump and AC dump
Input signal, therefore by the output of above-mentioned second detection module, T8032 is still in power supply state.And if this when
Waking up TV will appear false wake-up, i.e. also no load kernel can not stop directly, still ARM due to nuclear power electricity shortage
T8032 still powers a period of time.If exchange powers on again, T8032 thinks that ARM has waken up, and will not wake up ARM again.
Based on above content, by being solved to main chip module again programming starting up program in the embodiment of the present invention
The problem.
When user presses the standby button of TV remote controller, which can send standby wakeup letter to TV
Number.Standby wakeup module receives the standby wakeup signal, wakes up this by sending the first wake-up information to system core module
TV.
After the system core module of main chip module receives the first wake-up information, bring into operation starting up's journey
Sequence.Under normal circumstances, it when the system core module runs to the setting section of the startup program, can be sent out to standby wakeup module
The first confirmation message is sent, shows that current system nucleus module normally starts.Wherein, which is the startup program
Core, the i.e. part kernel, it is ensured that when startup program is run to herein, TV normally starts.
Standby wakeup module opening timing device while transmission first wakes up information, and judge and determine in the timer
Whether first confirmation message is had received in Shi Shichang.If it is, can stop responding standby wakeup signal；If it is not, then table
Bright current system nucleus module is in abnormal situation, i.e., false wake-up states: system core module is straight due to electricity shortage
Connect stopping.Appear in order to prevent standby wakeup module have electricity time in again exchange power on the problem of can not waking up TV,
Standby wakeup module needs to export the third input signal that the main chip module direct current powers at this time, passes through above-mentioned second detection mould
Block and the second control module directly power off to control the standby wakeup module that the main chip module includes, and are restored to television system
Original state, so as to again can be with normal boot-strap.
Specifically, in order to solve the problems, such as that false wake-up states are brought, during television startup, standby wakeup module
Interactive process between T8032 chip and system core module ARM chip is as shown in Figure 3.
Step 1: when TV is in standby, T8032 can detect whether to receive standby wakeup signal, when detecting
When standby wakeup signal, ARM chip is waken up by sending the first wake-up information to ARM chip, meanwhile, T8032 starting timing
Device starts timing.
ARM chip receives this first when waking up information, and bring into operation startup program, when running to the startup program
When the part Kernel, ARM is sent to T8032 and wakes up successful ACK, i.e. the first confirmation message.
Step 2:T8032 judges the first confirmation that the transmission of ARM chip whether is received in the timing length of the timer
Information.
Step 3: if it is not, then the non-normal boot-strap of TV, i.e., in false wake-up states, T8032 passes through output direct current at this time
The third input signal powered on, i.e. DC_DET=1 control itself power-off by the second detection module and the second control module.
If it is, TV is in open state, T8032 no longer responds standby wakeup signal.
In the embodiment of the present invention, to standby wakeup mould when running to the setting section of startup program by system core module
Block sends the first confirmation message, to ensure whether the TV has woken up, false wake-up occurs after solving standby AC dump,
The problem of so as to cause really TV can not be waken up within certain time.
Embodiment 4:
In order to guarantee that the second detection module can export control main chip module power-off second control signal, in above-mentioned each implementation
On the basis of example, in embodiments of the present invention, second detection module includes logic inverter and logic NAND gate, in which:
The input terminal of the logic inverter is connect with the power module, and the input terminal of output end and logic NAND gate connects
It connects；
Another input terminal of the logic NAND gate is connect with main chip module, and output end and second control module connect
It connects；
And it realizes in order to responding second control signal and gives main chip module power-off, second control module includes the
Two switches:
The second switch is separately connected the output end, the power module and the standby wakeup of the logic NAND gate
Module.
In order to solve introduce storage capacitor bring booting AC dump when, can not storage capacitor discharge during again on
Electricity wakes up the problem of TV, which is made of logic inverter, logic NAND gate, wherein the input of the logic inverter
End is connect with power module, the input terminal connection of output end and NAND gate；And another input terminal and master chip of the NAND gate
Module connection, output end are connect with the second control module.
Second control module is made of second switch, the master chip mould caused by discharging then for solution storage capacitor
Block cannot power off in time and caused by the problem of TV can not be waken up during the electric discharge, so under this kind of state, it should control
Second switch processed disconnects, to realize the power-off of the T8032 of main chip module.
Specifically, in the embodiment of the present invention the second detection module and the second control module working principle are as follows:
In normal operation, power module and main chip module are in power-up state to TV, i.e. power module is handed over
Power detection signal AC_DET and direct current booting detection signal DC_DET is high level on stream, i.e., the two of logic NAND gate input
In end, the one end connecting with logic inverter is since the level-one of logic inverter negates so that inputting as low level, other end input
For high level, at this point, exporting high level according to the control logic of logic NAND gate, and do not need to power off to master chip at this time,
Therefore the second switch of second control module should be closed state, therefore the control logic of the second switch should be low level and break
It opens, high level closure.If pressing when switch is standby, AC_DET and DC_DET is low level at this time, by logic inverter and
The control of logic NAND gate exports high level, and second switch is closed at this time, to guarantee to be waken up under standby mode.
If the unexpected AC dump under open state, AC_DET are low level, due to the electric discharge of storage capacitor, DC_DET
For high level, at this time in order to avoid generating the case where can not waking up TV during electric discharge, by logic inverter and logical AND gate,
Export low level, so that second switch disconnects, that is, give main chip module power-off, it is specific for main chip module include it is standby
Wake-up module T8032 power-off, so that television system restPoses, and then can be with normal boot-strap.And if TV is in
When system upgrade or factory reset, at this time there is no AC dump, i.e. AC_DET is high level, but TV master chip
Module is in abnormal working position, and DC_DET is low level, therefore passes through logic inverter and logical AND gate, exports as high electricity
It is flat, it is powered to main chip module, main chip module could be maintained to complete system upgrade or factory reset.Specifically
, the characteristic of the second detection module and the control T8032 power-off of the second control module is as shown in table 1.
Table 1
Wherein H represents high level, and L represents low level.
It is real by the way that a logic inverter and a logic NAND gate is arranged to the second detection module in the embodiment of the present invention
Output control main chip module power-off second control signal is showed, and one switch is set to control main core in the second control module
Piece module powering on and powering off.
Embodiment 5:
In order to guarantee that first detection module can export control flow driver module power-off first control signal, above-mentioned each
On the basis of embodiment, in embodiments of the present invention, the first detection module includes logical AND gate:
The input terminal of the logical AND gate is connect with the power module, and another input terminal and the main chip module connect
It connects, output end is connect with the first control module；
And it realizes in order to responding first control signal and gives main chip module power-off, first control module includes the
One switch:
The first switch is separately connected screen driver module and ground terminal.
In order to realize by power module and main chip module jointly come the electric discharge of control flow driver module, first inspection
It surveys module to be made of a logical AND gate, the logical AND gate is there are two input terminal and an output end, the wherein logical AND gate
One input terminal is connect with power module, and another input terminal is connect with main chip module, and output end is connect with the first control module.It patrols
The control logic of volume AND gate circuit can be just exported high level, otherwise export so the input of input terminal is high level
Low level.
And TV is in normal operation, power module and main chip module are in power-up state, i.e., patrol by this
Collecting with the control signal exported after door is high level, but does not need to discharge to screen driver module at this time, therefore,
First switch is provided in first control module, and the first switch is high level disconnection, to guarantee that TV can be normal
Work.One end of the first switch connect with screen driver module, and in order to guarantee that screen display drives repid discharge, this
The other end of one switch is connect with ground terminal.
Specifically, in the embodiment of the present invention first detection module and the first control module working principle are as follows:
In normal operation, power module and main chip module are in power-up state to TV, i.e. power module is handed over
Power detection signal AC_DET and direct current booting detection signal DC_DET is high level on stream, i.e. the two of logical AND gate input terminal
It is high level input, at this point, high level is exported according to the control logic of logical AND gate, and first switch is high level disconnection,
So screen driver module does not discharge.If AC_DET and DC_DET is low level at this time by when switch carries out standby, lead to
Logical AND gate output low level is crossed, first switch is closed at this time, shields driver module repid discharge.
If the unexpected AC dump under open state, AC_DET is low level at this time, due to the electric discharge of storage capacitor,
DC_DET is high level, exports low level by logical AND gate, first switch closure shields driver module repid discharge,
Prevent the problem of ghost occur in unexpected AC dump.And if when TV is in system upgrade or factory reset,
There is no AC dumps at this time, i.e. AC_DET is high level, but TV main chip module is in abnormal working position, DC_
DET is low level, therefore the output of logical AND gate is still low level, shield driver module repid discharge so that system into
Control flow driver module is remained to when row upgrading or factory reset to discharge rapidly, avoids the generation of ghost.Specifically
The logical AND gate and the characteristic of the control flow display driver circuit of first switch electric discharge are as shown in table 2.
| Input 1 (AC_DET) | Input 2 (DC_DET) | Switch state | Discharge condition |
| L | L | It closes | Electric discharge |
| L | H | It closes | Electric discharge |
| H | L | It closes | Electric discharge |
| H | H | It opens | It does not discharge |
Table 2
Wherein L represents low level, and H represents high level.
In the embodiment of the present invention, by the way that a logical AND gate is arranged to first detection module, output control screen display is realized
Show that drive module powers off first control signal, and one switch is set in the first control module and carrys out control flow driver module
Electric discharge.
The display screen discharge control device of the OLED TV is carried out detailed below with reference to Fig. 4 with a specific embodiment
Thin description.Fig. 4 is the electrical block diagram of the display screen discharge control device of the OLED TV, in the electrical block diagram
Including power module, main chip module: T8032 and ARM chip, OLED module: screen driver module and screen logic control mould
Block, first detection module: with door 1, the second detection module: NAND gate 0, the first control module and the second control module.
Next respectively from normal boot-strap, direct current normal Standby, booting three processes of AC dump to the OLED TV
The circuit structure of display screen discharge control device is described.
OLED module powers on flow chart when Fig. 5 is TV normal boot-strap.
TV before exchange powers on AC_DET be low level, due to DC_DET default also be low level, at this time by with
NOT gate 0 export high level, i.e., control T8032 close the switch, this when T8032 normal power supply.After booting, AC_DET becomes high
The pin GPIO0 that control flow logic control is powered can be set to high level by level, TV main chip module, allow OLED module
Vdd is powered on.After OLED module electrifying timing sequence Fig. 6,500ms, main chip module control GPIO2 (DC_DET) is set to high electricity
Flat, by the way that control flow is shown that driving electric discharge pin Panel_AC_DET becomes high level with door 1, screen stops electric discharge, most post-tensioning
The pin GPIO1 of high control flow display driving power supply is powered on to Evdd, and such OLED module is with regard to normal power supply.
The power down flow chart of OLED module when Fig. 7 is TV direct current normal Standby.
TV can execute standby process when receiving the standby signal pressed and issued after remote control POWER key.TV master at this time
GPIO2 (DC_DET) is first set to low level by chip module, this when, exchange did not powered off, and AC_DET is high level, by with
After the logic control of door 1, Panel_AC_DET becomes low level, shields electric discharge rapidly, while dragging down screen driver module and supplying
Electric Evdd.Completely, that is, after 30ms, screen Logic control module power supply Vdd is pulled low, to protect for driver module electric discharge to be shielded
Card screen Logic control module normal powering down.After standby, ARM also can power down, only T8032 working, it will wait wake source will
ARM wakes up.
OLED screen driver module realizes the flow chart of repid discharge when Fig. 8 is television startup AC dump.
For TV in the state of normal boot-strap, AC_DET is high level, and DC_DET is also high level, if exchange is disconnected suddenly
Electricity, AC_DET can become low level, reversed by the level-one of NOT gate, and one end input of NAND gate 0 is high level at this time.Due to electricity
Depending on when AC dump, the storage capacitor of power module can discharge, i.e., so that DC_DET is high level, therefore NAND gate 0
Another input terminal be high level, by the logic control of NAND gate 0, export low level, i.e. T8032 is powered down, so that again
After exchange powers on, T8032 can be re-powered, and be then wake up machine, without calling out not awake problem.Simultaneously as with door 1
Both ends input be separately connected AC_DET and DC_DET, when AC dump, AC_DET can become low level, and DC_DET is still high electricity
It is flat, therefore be low level with the output of door 0, the first switch closure that the first control module includes, and then shield driver module
Electric discharge rapidly, prevents the generation of the ghost in AC dump.Since screen driver module energy storage is limited, wait shield display driving mould
Completely, that is, after 30ms, screen Logic control module power supply Vdd is pulled low for block electric discharge, to guarantee that screen Logic control module is normal
Power down.
In conclusion the present invention provides a kind of display screen discharge control device of OLED TV, to solve the prior art
In can not be controlled under several scenes OLED display screen electric discharge the problem of.Described device includes first detection module and the first control
Module, in which: the first detection module is separately connected the power module, main chip module connection and the first control mould
Block, for receive the power module AC dump the first input signal or the main chip module DC dump second
When input signal, first control signal is exported；First control module connects the screen driver module, for receiving
When the first control signal of the first detection module output, the screen driver module electric discharge is controlled.
For systems/devices embodiment, since it is substantially similar to the method embodiment, so the comparison of description is simple
Single, the relevent part can refer to the partial explaination of embodiments of method.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or an operation are distinguished with another entity or another operation, without necessarily requiring or implying these entities
Or there are any actual relationship or orders between operation.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, the reality of complete hardware embodiment, complete Application Example or connected applications and hardware aspect can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of display screen discharge control device of OLED TV, the display screen discharge control device include power module, master
Chip module, screen Logic control module and screen driver module, which is characterized in that the display screen discharge control device also wraps
Include first detection module and the first control module, in which:
The first detection module is separately connected the power module, the main chip module and the first control module, for connecing
Receive the first input signal of the power module AC dump or the second input signal of the main chip module DC dump
When, export first control signal；
First control module connects the screen driver module, for receiving the of the first detection module output
When one control signal, the screen driver module electric discharge is controlled.
2. device as described in claim 1, which is characterized in that described device further includes the second detection module and the second control mould
Block, in which:
Second detection module is separately connected the power module, the main chip module and the second control module, for connecing
The third input signal that the first input signal and the main chip module direct current for receiving the power module AC dump power on
When, export second control signal；
Second control module is separately connected the power module and the main chip module, for receiving second inspection
When surveying the second control signal of module output, the main chip module power-off is controlled.
3. device as claimed in claim 2, which is characterized in that the main chip module includes the system core mould interconnected
Block and standby wakeup module, in which:
The system core module wakes up information for receiving the standby wakeup module is sent first, runs startup program,
When running to the setting section of the startup program, Xiang Suoshu standby wakeup module sends the first confirmation message；
The standby wakeup module, for when receiving standby wakeup signal, Xiang Suoshu system core module to send first and calls out
Awake information, and opening timing device judge that the system core module whether is received in the timing length of the timer to be sent
The first confirmation message, if it is not, then exporting the third input signal that the main chip module direct current powers on.
4. device as claimed in claim 2, which is characterized in that second detection module includes that logic inverter and logical AND are non-
Door, in which:
The input terminal of the logic inverter is connect with the power module, and output end is connect with the input terminal of logic NAND gate；
Another input terminal of the logic NAND gate is connect with main chip module, and output end is connect with second control module.
5. device as claimed in claim 2, which is characterized in that second control module includes second switch:
The second switch is separately connected the output end, the power module and the standby wakeup mould of the logic NAND gate
Block.
6. device as described in claim 1, which is characterized in that the first detection module includes logical AND gate:
The input terminal of the logical AND gate is connect with the power module, and another input terminal is connect with the main chip module, defeated
Outlet is connect with the first control module.
7. device as described in claim 1, which is characterized in that first control module includes first switch:
The first switch is separately connected screen driver module and ground terminal.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811615553.2A CN109688355A (en) | 2018-12-27 | 2018-12-27 | A kind of display screen discharge control device of OLED TV |
| PCT/CN2019/089139 WO2020062905A1 (en) | 2018-09-25 | 2019-05-29 | Oled display device and control method therefor |
| EP19199008.4A EP3629320B1 (en) | 2018-09-25 | 2019-09-23 | Oled display device, and method for controlling the oled display device |
| US16/663,032 US11200837B2 (en) | 2018-09-25 | 2019-10-24 | OLED display device, and method for controlling the OLED display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811615553.2A CN109688355A (en) | 2018-12-27 | 2018-12-27 | A kind of display screen discharge control device of OLED TV |
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| CN109688355A true CN109688355A (en) | 2019-04-26 |
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| CN201811615553.2A Pending CN109688355A (en) | 2018-09-25 | 2018-12-27 | A kind of display screen discharge control device of OLED TV |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020062905A1 (en) * | 2018-09-25 | 2020-04-02 | 青岛海信电器股份有限公司 | Oled display device and control method therefor |
| US11200837B2 (en) | 2018-09-25 | 2021-12-14 | Hisense Visual Technology Co., Ltd. | OLED display device, and method for controlling the OLED display device |
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