CN109377959A - Show drive voltage supply device, display device and alternating current shutdown control method - Google Patents
Show drive voltage supply device, display device and alternating current shutdown control method Download PDFInfo
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- CN109377959A CN109377959A CN201811497881.7A CN201811497881A CN109377959A CN 109377959 A CN109377959 A CN 109377959A CN 201811497881 A CN201811497881 A CN 201811497881A CN 109377959 A CN109377959 A CN 109377959A
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- alternating current
- voltage
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- supply device
- drive voltage
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
Abstract
The present invention provides a kind of display drive voltage supply device, display device and alternating current shutdown control method.Display drive voltage supply device of the invention includes power module, two switch elements, alternating current power failure detection module and micro-control unit, the power-down state of alternating current is directly detected by alternating current power failure detection module, the power down of supply voltage and electroluminescent voltage is controlled by two switch elements, it is possible thereby to the input condition of the reflection alternating current of prestissimo, the speed and accuracy of alternating current power failure detection are all greatly improved, ensure that power-off sequential meets electric discharge demand, effectively prevents the erroneous judgement that display device shuts down to alternating current.
Description
Technical field
The present invention relates to field of display technology, fill in particular to a kind of display drive voltage supply device and display
It sets, further relates to a kind of alternating current shutdown control method for showing driving power.
Background technique
Existing display device needs a discharge process when shutdown, and specific requirement is to guarantee supply voltage (i.e.
Vdd voltage refers to the operating voltage of the integrated circuits such as logic card, driving) it is subsequent in electroluminescent voltage (i.e. EVDD voltage) closing
30ms or more is held in continuation of insurance.
It is wanted when alternating current shutdown (i.e. AC shutdown refers to situations such as directly pulling out attaching plug or external electrical network power-off)
Want the requirement for meeting the discharge process, need accurately to detect alternating current when power down.
It is at present to detect alternating current indirectly by detecting the power-down state of vdd voltage to the detection method of alternating current power failure
Whether power down, this method has the following problems: might have other situations leads to VDD power down, such as one comparison of system access
Big capacitive load is pulled low in the VDD short time and then restores, if the situation is judged as alternating current power failure, it will cause accidentally
Sentence；Moreover, this method is easy lag to the detection of alternating current power failure, just need to improve falling for power panel to meet electric discharge demand
Electric holding capacity, and power down holding capacity promotes typically more difficulty.Therefore, it is necessary to one kind can accurately and rapidly detect exchange
The method of electric power down.
Summary of the invention
It, being capable of detection alternating current promptly and accurately the purpose of the present invention is to provide a kind of display drive voltage supply device
Off-mode.
It is a further object to provide a kind of alternating current shutdown control methods, can satisfy when alternating current shuts down
Electric discharge requires.
According to an aspect of the present invention, a kind of display drive voltage supply device is provided, comprising:
Power module, including alternating current receiving end, the first output end and second output terminal, first output end is for defeated
Electroluminescent voltage out, the second output terminal are used for output supply voltage；
First switching element connects first output end and display module, for controlling the first output end power down；
Second switch element connects the second output terminal and the display module, for controlling the second output terminal
Power down；
Alternating current power failure detection module connects the alternating current receiving end, to detect whether the alternating current receiving end is fallen
Electricity；
Micro-control unit is separately connected the alternating current power failure detection module, first switching element and second switch element,
For controlled according to the power-down conditions of the alternating current receiving end first switching element and second switch element conducting and
Shutdown.
In a kind of illustrative embodiments of the invention, the alternating current power failure detection module includes:
AC input, for receiving the alternating current voltage；
Power input is used to provide the described the operating voltage of alternating current power failure detection module；
Disconnecting switch is separately connected the AC input and power input, for the alternating current voltage to be isolated
With the supply voltage, and level signal is converted by the alternating current voltage, to pass to output end；
Third switch element connects the disconnecting switch, transmits for controlling the level signal to output end；
Output end connects the third switch element and the micro-control unit, for exporting to the micro-control unit
Detection information.
In a kind of illustrative embodiments of the invention, the disconnecting switch is optocoupler.
In a kind of illustrative embodiments of the invention, the third switch element is triode.
In a kind of illustrative embodiments of the invention, the alternating current power failure detection module further include: voltage stabilizing element,
The AC input is connected, for stablizing the alternating current voltage.
In a kind of illustrative embodiments of the invention, the voltage stabilizing element includes two pole of pressure stabilizing of two differential concatenations
Pipe.
In a kind of illustrative embodiments of the invention, the operating voltage of the alternating current power failure detection module is described
The supply voltage of power module output.
In a kind of illustrative embodiments of the invention, the first switching element and second switch element are positioned at described
In power module.
According to another aspect of the present invention, a kind of alternating current shutdown control method showing driving power is provided, comprising:
Detection of power loss is carried out to alternating current using alternating current power failure detection module, and will test result and be transmitted to microcontroller list
Member；
The micro-control unit controls the power-off sequential of electroluminescent voltage and supply voltage according to the testing result, with
Make the power down of electroluminescent voltage elder generation, after electroluminescent voltage power down is more than the predetermined time, then makes supply voltage power down.
According to a further aspect of the invention, a kind of display device is provided, is driven including display described in any of the above item
Voltage supply device.
Display drive voltage supply device of the invention directly detects falling for alternating current by alternating current power failure detection module
Electricity condition successively controls the power down of vdd voltage and EVDD voltage, it is ensured that power-off sequential meets electric discharge demand.It on the one hand can be most
The input condition of the reflection alternating current of fast speed all greatly improves the speed and accuracy of alternating current power failure detection, effectively keeps away
The erroneous judgement that display device shuts down to alternating current is exempted from.On the other hand, the power down holding capacity of power supply is promoted compared to capacitor is increased,
The power module is more easily implemented the requirement of discharge process, and structure is simple and effective, and structure size is ideal, does not increase into
This, safety performance is ideal.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.It should be evident that the accompanying drawings in the following description is only the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is existing alternating current shutdown control principle drawing；
Fig. 2 is alternating current of the present invention shutdown control principle drawing；
Fig. 3 is alternating current power failure detection circuit figure of the present invention；
Fig. 4 is that the invention shows the alternating current shutdown control method flow charts of driving power.
In figure, 1, power module；2, first switching element；3, second switch element；4, display module；5, alternating current power failure
Detection module；6, micro-control unit；7, disconnecting switch；8, third switch element；9, voltage stabilizing element.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
In the related technology, exchange is detected indirectly by detecting the power-down state of supply voltage (hereinafter referred to as vdd voltage)
The circuit of electric power down is as shown in Figure 1, supply voltage detection of power loss module connects the vdd voltage output end and microcontroller of power module
Unit MCU, supply voltage detection of power loss module detect the power-down state of vdd voltage, when detecting vdd voltage lower than a threshold value
Voltage U1When, micro-control unit MCU is sent instructions to, then micro-control unit MCU closes electroluminescent voltage (hereinafter referred to as
EVDD voltage), vdd voltage is turned off after 30ms.
When encountering one bigger capacitive load of power network fluctuation or system access, vdd voltage may be in short-term
It is interior to be pulled low to lower than U1Then restore again, VDD detection of power loss module is likely to the situation being judged as alternating current power failure, make
At erroneous judgement.
In addition, working as U1When being arranged smaller, lag is just compared to the detection of alternating current shutdown.Since vdd voltage is by handing over
Galvanic electricity voltage is transformed, and possible alternating current has been switched off a period of time, and vdd voltage just drops to U1, at this moment in order to guarantee
EVDD voltage is closed prior to vdd voltage at least 30ms, it is necessary to which power panel has stronger power down to keep function, that is, needs to increase electricity
The capacity of appearance, and the capacitor of large capacity is with the rising of capacity, normal working hours, size, cost, safety etc. all can be at
Index variation；And the current needs of VDD and EVDD are all very big, and the every increase 1ms of failure retention time is highly difficult, so very
The difficult power down by promoting power panel keeps function to go to guarantee the requirement of shutdown timing.
A kind of display drive voltage supply device is provided in embodiment of the present invention, by accurately and timely detecting alternating current
Power-down state come meet display device to electric discharge timing requirement.The display drive voltage supply device can be used for driving LCD
A variety of display devices such as display screen, LED display, OLED display screen, will not enumerate herein, below to be applied to driving
It is illustrated for OLED display screen.
As shown in Fig. 2, the display drive voltage supply device of embodiment of the present invention includes power module 1, power module 1
Including alternating current receiving end, the first output end and second output terminal, the first output end is for exporting EVDD voltage, second output terminal
For exporting vdd voltage.The display drive voltage supply device further includes first switching element 2 and second switch element 3, and first
Switch element 2 connects the first output end and display module 4, for controlling the first output end power down；The connection of second switch element 3 the
Two output ends and display module 4, for controlling second output terminal power down.The display drive voltage supply device further includes alternating current
Detection of power loss module 5, alternating current power failure detection module 5 connect alternating current, with detect alternating current whether power down.Alternating current power failure inspection
It surveys module 5, first switching element 2 and second switch element 3 also all to connect with micro-control unit 6, micro-control unit 6 is according to exchange
The turn-on and turn-off of power-down conditions the control first switching element 2 and second switch element 3 of electricity.
Present embodiment directly detects the power-down state of alternating current receiving end using alternating current power failure detection module, can be most
The input condition of the reflection alternating current of fast speed, once the disconnection of alternating current importation (including alternating current shuts down or power grid is different
Normal off is opened), micro-control unit is will receive immediately to induction signal, can disconnect EVDD voltage at once in this way, then can use compared with
Small capacitor can keep vdd voltage 30ms.Speed and standard of the display drive voltage supply device to alternating current shutdown detection
Exactness all greatly improves, and effectively prevents the erroneous judgement that display device shuts down to alternating current.Meanwhile electricity is promoted compared to capacitor is increased
The power down holding capacity in source, which is more easily implemented the requirement of discharge process, and structure is simple and effective, and structure ruler
Very little ideal, does not increase cost, and safety performance is ideal.
The display drive voltage supply device of embodiment of the present invention is described in detail below:
First switching element 2 and second switch element 3 of the invention is respectively used to the first output end of control and the second output
Electricity is made a clean sweep of, can be diode or triode, can be metal-oxide-semiconductor, be connected or cut under the instruction of micro-control unit 6
Only, whether power down to control display device EVDD voltage and vdd voltage, when metal-oxide-semiconductor conducting, EVDD voltage or vdd voltage
Normal power supply, when metal-oxide-semiconductor cut-off, EVDD voltage or vdd voltage power down.Deadline and order by two MOS of control,
It may be implemented to close vdd voltage after EVDD voltage closes 30ms.
Since alternating current belongs to high voltage, alternating current power failure detection module of the invention should be high using detection is suitable for
The detection circuit of voltage.Alternating current can be 220V voltage, or other voltages.In this illustrative embodiments, it hands over
Galvanic electricity detection of power loss module 5 may include AC input, power input, disconnecting switch 7, third switch element 8 and defeated
Outlet.AC input is for receiving alternating current voltage.Power input is for providing the work of alternating current power failure detection module
Make voltage.Disconnecting switch 7 is separately connected AC input and power input, for alternating current voltage and power supply electricity to be isolated
Pressure, and level signal is converted by alternating current voltage, to pass to output end.Third switch element 8 connects disconnecting switch 7, uses
It is transmitted in control level signal to output end.Output end connects disconnecting switch 7 and micro-control unit 5, is used for micro-control unit 5
Export detection information.
For example, as shown in figure 3, the AC input of alternating current power failure detection module 5 can receive 100-240 volt
Alternating current voltage, the input terminal connect the control terminal of a disconnecting switch, and disconnecting switch further includes first end and second end, first end
Operating voltage is connected, second end connects the control terminal of a third switch element.Third switch element also includes first end and second
End, first end connect operating voltage, second end ground connection, and first end and second end connects micro-control unit jointly.Disconnecting switch
Level signal can be converted by alternating current voltage, by the on or off of third switch element, control micro-control unit and connect
The signal level state received, with according to level signal height judge alternating current whether power down.Alternating current power failure detection module 5 can
To be set in power module, it is convenient for circuit layout and control.
In this illustrative embodiments, disconnecting switch 7 can be optocoupler.Optocoupler is transmitted using light as medium
The voltage signal of input can be become the optical signal of lumination of light emitting diode in optocoupler, then pass through the light in optocoupler by electric signal
Optical signal is reduced into electric signal output by quick triode.It is contactless with small in size, the characteristics of strong antijamming capability.As schemed
Show, the input terminal of the light emitting diode of the optocoupler connects AC input, and phototriode is NPN output, current collection
Pole connects the power input VCC of the detection circuit, and to provide voltage, emitter provides level signal to micro-control unit.When
When the normal power supply of alternating-current power supply end, optocoupler conducting, since power input VCC is high level, therefore the transmitting of phototriode
Pole exports high level signal；Conversely, optocoupler disconnects when the normal powering down of alternating-current power supply end, the emitter output of phototriode
Low level signal.In other illustrative embodiments of the invention, the specific structure of optocoupler can also be other structures.Together
When, it is not high to rate request since the purpose of optocoupler of the present invention is to provide level signal, therefore can be low speed optocoupler
It can be high speed photo coupling.The present invention does not carry out particular determination to this.
In other illustrative embodiments, disconnecting switch 7 can also be magnetic coupling device, be isolated using coupling transformer
Signal and transmission of analogue signal.Details are not described herein again.
In this illustrative embodiments, third switch element 8 can be triode.As shown, third switch element
For NPN type triode, ground level receives the level signal of optocoupler emitter transmission, and the power supply that pole electrode connects the detection circuit is defeated
Enter to hold VCC, to provide voltage, emitter ground connection.Resistance is also connected between power input VCC and the pole electrode of the triode
The pole electrode of element, the triode connects micro-control unit by several resistive elements, and emitter is also by several resistive elements
Connect micro-control unit.When alternating-current power supply end normal power supply, the emitter of optocoupler conducting, phototriode exports high level
Signal, NPN type triode conducting, the electric current of power input VCC are directly grounded, and micro-control unit receives low level signal.
Conversely, optocoupler disconnects when the normal powering down of alternating-current power supply end, the emitter of phototriode exports low level signal, the NPN type
Triode cut-off, the electric current of power input VCC flow through micro-control unit, and micro-control unit receives high level signal.It is micro- as a result,
Control unit according to the height of the level signal received judge alternating current whether power down.
In other embodiments of the invention, third switch element 8 can also be PNP type triode, correspondingly, it is passed
Whether power down is opposite with NPN type triode with alternating current for the level signal height sent.In other embodiments, third switch member
Part can also be diode, such as PMOS tube or NMOS tube, can be by controlling the transmitting of level signal to micro-control unit
Transmit alternating current power failure state.It will not enumerate herein.
In this illustrative embodiments, alternating current power failure detection module of the present invention further includes voltage stabilizing element 9, connection exchange
Electrical input, for stablizing alternating current voltage, to ensure the normal work of each component in detection circuit.As shown, this is steady
Pressure element may include the zener diode of two differential concatenations, and the zener diode and optocoupler of two differential concatenations are simultaneously
Connection.
In this illustrative embodiments, the operating voltage of alternating current power failure detection module of the present invention is power module output
Supply voltage, i.e., alternating current power failure detection module power input VCC input voltage from display driving voltage supply
To the supply voltage VDD that device exports, it is possible thereby to electricity needed for directly providing alternating current power failure detection module using vdd voltage
Pressure simplifies circuit structure.Certainly, in other embodiments, the voltage of power input VCC input is from can also come
It is directly exported from the voltage of other modules, or by supply voltage, details are not described herein again.
In this illustrative embodiments, first switching element 2 and second switch element 3 are located in power module 1.Example
Such as, two MOS are all set in power module, convenient for controlling vdd voltage and EVDD voltage.
Embodiment of the present invention also provides a kind of alternating current shutdown control method for showing driving power, referring to Fig. 4, packet
It includes:
Step S110 carries out detection of power loss to alternating current using alternating current power failure detection module, and will test result transmission
To micro-control unit；
Step S210, micro-control unit control the power-off sequential of electroluminescent voltage and supply voltage according to testing result,
So that the power down of electroluminescent voltage elder generation, after electroluminescent voltage power down is more than the predetermined time, then makes supply voltage power down.
This method directly detects the power-down state of alternating current receiving end using alternating current power failure detection module, can most quickly
To micro-control unit, micro-control unit can then disconnect EVDD voltage at once, then may be used the input condition of the reflection alternating current of degree
Vdd voltage 30ms can be kept using lesser capacitor, vdd voltage is finally disconnected again, completes alternating current shutdown process.Thus
The requirement that can satisfy alternating current shutdown discharge process, effectively prevents the erroneous judgement that display device shuts down to alternating current.
This method can be used for a variety of display driving power alternating current shutdown controls, and it is aobvious such as to can be LCD display, LED
The shutdown of a variety of display devices such as display screen, OLED display screen controls, and will not enumerate herein.For the pass of different display devices
If machine timing requirements are different, as long as adjustment micro-control unit is to the power-off sequential of electroluminescent voltage and supply voltage.
Correlation module involved in present implementation and circuit structure are no longer superfluous herein referring to above-mentioned display drive voltage supply device
It states.
Embodiment of the present invention also provides a kind of display device, including shows drive voltage supply device above.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures
On, or refer to that certain structure is " direct " and be arranged in other structures, or refer to that certain structure is arranged by the way that another structure is " indirect " in other knots
On structure.
Term "one", " one ", "the", " described " and "at least one" be to indicate that there are one or more elements/groups
At part/etc.；Term " comprising " and " having " is to indicate the open meaning being included and refer in addition to listing
Element/component part/also may be present except waiting other element/component part/etc..
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by appended
Claim is pointed out.
Claims (10)
1. a kind of display drive voltage supply device characterized by comprising
Power module, including alternating current receiving end, the first output end and second output terminal, first output end is for exporting electricity
Photoluminescence voltage, the second output terminal are used for output supply voltage；
First switching element connects first output end and display module, for controlling the first output end power down；
Second switch element connects the second output terminal and the display module, for controlling the second output terminal power down；
Alternating current power failure detection module connects the alternating current receiving end, with detect the alternating current receiving end whether power down；
Micro-control unit is separately connected the alternating current power failure detection module, first switching element and second switch element, is used for
The turn-on and turn-off of the first switching element and second switch element are controlled according to the power-down conditions of the alternating current receiving end.
2. display drive voltage supply device according to claim 1, which is characterized in that the alternating current power failure detects mould
Block includes:
AC input, for receiving the alternating current voltage；
Power input is used to provide the described the operating voltage of alternating current power failure detection module；
Disconnecting switch is separately connected the AC input and power input, for the alternating current voltage and institute to be isolated
Supply voltage is stated, and converts level signal for the alternating current voltage, to pass to output end；
Third switch element connects the disconnecting switch, transmits for controlling the level signal to output end；
Output end connects the third switch element and the micro-control unit, detects for exporting to the micro-control unit
Information.
3. display drive voltage supply device according to claim 2, which is characterized in that the disconnecting switch is optical coupler
Part.
4. display drive voltage supply device according to claim 2, which is characterized in that the third switch element is three
Pole pipe.
5. display drive voltage supply device according to claim 2, which is characterized in that the alternating current power failure detects mould
Block further include:
Voltage stabilizing element connects the AC input, for stablizing the alternating current voltage.
6. display drive voltage supply device according to claim 5, which is characterized in that the voltage stabilizing element includes two
The zener diode of differential concatenation.
7. display drive voltage supply device according to claim 2, which is characterized in that the alternating current power failure detects mould
The operating voltage of block is the supply voltage of power module output.
8. display drive voltage supply device according to claim 1, which is characterized in that the first switching element and
Two switch elements are located in the power module.
9. a kind of alternating current shutdown control method for showing driving power characterized by comprising
Detection of power loss is carried out to alternating current using alternating current power failure detection module, and will test result and be transmitted to micro-control unit；
The micro-control unit controls the power-off sequential of electroluminescent voltage and supply voltage according to the testing result, so that electric
The power down of photoluminescence voltage elder generation after electroluminescent voltage power down is more than the predetermined time, then makes supply voltage power down.
10. a kind of display device, which is characterized in that including display drive voltage supply of any of claims 1-8
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811497881.7A CN109377959A (en) | 2018-12-07 | 2018-12-07 | Show drive voltage supply device, display device and alternating current shutdown control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811497881.7A CN109377959A (en) | 2018-12-07 | 2018-12-07 | Show drive voltage supply device, display device and alternating current shutdown control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109377959A true CN109377959A (en) | 2019-02-22 |
Family
ID=65372828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811497881.7A Pending CN109377959A (en) | 2018-12-07 | 2018-12-07 | Show drive voltage supply device, display device and alternating current shutdown control method |
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| Country | Link |
|---|---|
| CN (1) | CN109377959A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637436A (en) * | 2019-01-25 | 2019-04-16 | 深圳市明微电子股份有限公司 | Pressure stabilizing control method, driving chip, LED drive circuit and display device |
| CN110415632A (en) * | 2019-07-23 | 2019-11-05 | 安徽天域视听器材有限公司 | Video transmission system and its transmission method based on voice control |
| CN111681606A (en) * | 2020-07-22 | 2020-09-18 | 宁波视睿迪光电有限公司 | Protection control power supply, OLED screen control system and OLED screen |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020063534A1 (en) * | 2000-11-28 | 2002-05-30 | Samsung Electro-Mechanics Co., Ltd | Inverter for LCD backlight |
| KR100599647B1 (en) * | 2003-11-10 | 2006-07-12 | 삼성에스디아이 주식회사 | Plasma display panel and driving method thereof |
| CN101308630A (en) * | 2007-05-18 | 2008-11-19 | 群康科技(深圳)有限公司 | LCD device |
| CN101373302A (en) * | 2007-08-24 | 2009-02-25 | 北京京东方光电科技有限公司 | Apparatus for improving liquid crystal panel discharging characteristic |
| CN201262819Y (en) * | 2008-09-28 | 2009-06-24 | 深圳创维－Rgb电子有限公司 | Liquid crystal television and sequence control circuit |
| CN103943064A (en) * | 2014-03-11 | 2014-07-23 | 京东方科技集团股份有限公司 | Shut-down control method and circuit, driving circuit and AMOLED display device |
| CN205194297U (en) * | 2015-11-25 | 2016-04-27 | 创维电子器件（宜春）有限公司 | AC detection circuitry and LED power supply unit |
| CN108257570A (en) * | 2018-02-09 | 2018-07-06 | 京东方科技集团股份有限公司 | Eliminate control circuit, its control method and the liquid crystal display device of power-off ghost shadow |
| CN108521168A (en) * | 2018-06-11 | 2018-09-11 | 扬州万泰电子科技有限公司 | Information quick storage protection power source circuit when a kind of electric energy meter power down |
-
2018
- 2018-12-07 CN CN201811497881.7A patent/CN109377959A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020063534A1 (en) * | 2000-11-28 | 2002-05-30 | Samsung Electro-Mechanics Co., Ltd | Inverter for LCD backlight |
| KR100599647B1 (en) * | 2003-11-10 | 2006-07-12 | 삼성에스디아이 주식회사 | Plasma display panel and driving method thereof |
| CN101308630A (en) * | 2007-05-18 | 2008-11-19 | 群康科技(深圳)有限公司 | LCD device |
| CN101373302A (en) * | 2007-08-24 | 2009-02-25 | 北京京东方光电科技有限公司 | Apparatus for improving liquid crystal panel discharging characteristic |
| CN201262819Y (en) * | 2008-09-28 | 2009-06-24 | 深圳创维－Rgb电子有限公司 | Liquid crystal television and sequence control circuit |
| CN103943064A (en) * | 2014-03-11 | 2014-07-23 | 京东方科技集团股份有限公司 | Shut-down control method and circuit, driving circuit and AMOLED display device |
| CN205194297U (en) * | 2015-11-25 | 2016-04-27 | 创维电子器件（宜春）有限公司 | AC detection circuitry and LED power supply unit |
| CN108257570A (en) * | 2018-02-09 | 2018-07-06 | 京东方科技集团股份有限公司 | Eliminate control circuit, its control method and the liquid crystal display device of power-off ghost shadow |
| CN108521168A (en) * | 2018-06-11 | 2018-09-11 | 扬州万泰电子科技有限公司 | Information quick storage protection power source circuit when a kind of electric energy meter power down |
Non-Patent Citations (1)
| Title |
|---|
| 苏文平等: "《电子技术实践与制作教程》", 31 January 2007 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637436A (en) * | 2019-01-25 | 2019-04-16 | 深圳市明微电子股份有限公司 | Pressure stabilizing control method, driving chip, LED drive circuit and display device |
| CN110415632A (en) * | 2019-07-23 | 2019-11-05 | 安徽天域视听器材有限公司 | Video transmission system and its transmission method based on voice control |
| CN110415632B (en) * | 2019-07-23 | 2023-01-17 | 安徽天域视听器材有限公司 | Video transmission system based on voice control and transmission method thereof |
| CN111681606A (en) * | 2020-07-22 | 2020-09-18 | 宁波视睿迪光电有限公司 | Protection control power supply, OLED screen control system and OLED screen |
| CN111681606B (en) * | 2020-07-22 | 2021-11-19 | 宁波视睿迪光电有限公司 | Protection control power supply, OLED screen control system and OLED screen |
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