CN109509420A - Generating circuit from reference voltage and display device - Google Patents
Generating circuit from reference voltage and display device Download PDFInfo
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- CN109509420A CN109509420A CN201811595734.3A CN201811595734A CN109509420A CN 109509420 A CN109509420 A CN 109509420A CN 201811595734 A CN201811595734 A CN 201811595734A CN 109509420 A CN109509420 A CN 109509420A
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- signal
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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
Abstract
This application discloses a kind of generating circuit from reference voltage and display device, which includes digital analog converter, sequence controller, n voltage signal output end, signal trigger circuit and communication switch circuit；The signal input part of the signal trigger circuit is connect with the first output end of the sequence controller, n signal triggering end of the signal trigger circuit is connect with the second output terminal of the sequence controller, and n signal output end of the signal trigger circuit and n controlled end of the communication switch circuit connect one to one；N input terminal of the communication switch circuit is connect with the output end of the digital analog converter, and n output end of the communication switch circuit connects one to one with the n voltage signal output end.The technical solution of the application is capable of the circuit structure of facilitating chip, reduces the cost of chip.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of generating circuit from reference voltage and display device.
Background technique
In a display device, the voltage signal of system board output passes through source drive electricity after sequence controller is handled
Road and gate driving circuit are connect with display panel, so that display device can normally be shown.In order to enable source drive
The voltage of circuit output meets the viewing habit of user, needs to provide reference voltage for source electrode drive circuit, which can
It is generated by the adjustable gamma electric voltage chip of numerical digit, wherein chip interior is required to turn by digital analog converter per output all the way
It is exported again after changing to source electrode drive circuit, the quantity of the output channel of chip interior and the quantity of digital analog converter are to correspond
, and the quantity of digital analog converter is excessive, the complexity that will lead to chip internal circuits increases, increased costs.
Summary of the invention
The application provides a kind of generating circuit from reference voltage and display device, it is intended to the circuit structure inside facilitating chip,
Reduce chip cost.
To achieve the above object, the application provides a kind of generating circuit from reference voltage, the generating circuit from reference voltage packet
It includes:
Digital analog converter is configured as output analog voltage signal；
Sequence controller；
N voltage signal output end；
Signal trigger circuit is provided with signal input part, n signal triggering end and n signal output end, the signal touching
The signal input part of Power Generation Road is connect with the first output end of the sequence controller, n signal of the signal trigger circuit
Triggering end is connect with the second output terminal of the sequence controller, the signal trigger circuit, when being configured as receiving described
The frame start signal of the first output end output of sequence controller, in the second output terminal output for receiving the sequence controller
When clock signal, from the control signal of one of signal output end output high level in the n signal output end；
Communication switch circuit is provided with n controlled end, n input terminal and n output end, the n of the communication switch circuit
A input terminal is connect with the output end of the digital analog converter, the n controlled end and the signal of the communication switch circuit
N signal output end of trigger circuit connects one to one, n output end of the communication switch circuit and the n voltage
Signal output end connects one to one, the communication switch circuit, is configured as receiving the letter in each controlled end
When the control signal of the high level of number trigger circuit output, reference voltage signal is generated and from output corresponding with the controlled end
End output；
Wherein, n is the integer more than or equal to 1.
Optionally, the signal trigger circuit includes n trigger being linked in sequence, the clock letter of each trigger
Number input terminal is the signal triggering end of the signal trigger circuit, and the data output end of each trigger is that the signal touches
It is defeated for the signal of the signal trigger circuit to be placed in the data input pin of the first trigger for the signal output end of Power Generation Road
Enter end, and is connect with the data output end of the trigger as terminal position.
Optionally, in two adjacent triggers of position, it is placed in the data output end of the trigger of prior location
It is connect with the data input pin for the trigger for being placed in latter position.
Optionally, when the control signal of the either signal output end output high level of the signal trigger circuit, other n-1
A signal output end exports low level control signal.
Optionally, the communication switch circuit includes n switching tube, n capacitor and n operational amplifier, each described
The controlled end of switching tube is the controlled end of the communication switch circuit, and the input terminal of each switching tube is the communication switch
The input terminal of circuit, the output end of each switching tube and the input terminal of each operational amplifier connect one to one,
And the output end of each switching tube and one end of each capacitor connect one to one, each operational amplifier
Output end is the output end of the communication switch circuit；The other end of each capacitor is grounded.
Optionally, when the switching tube is opened, the capacitor connecting with the output end of the switching tube charges,
And the operational amplifier connecting with the output end of the switching tube exports the reference voltage signal；
The switching tube close when, the capacitor connecting with the output end of the switching tube discharges, and with institute
The operational amplifier for stating the output end connection of switching tube maintains to export the reference voltage signal.
Optionally, the generating circuit from reference voltage further includes source electrode drive circuit, the source electrode drive circuit and the n
A voltage signal output end connection.
To achieve the above object, the application also provides a kind of generating circuit from reference voltage, is applied to the adjustable gamma electricity of numerical digit
Chip is pressed, the generating circuit from reference voltage includes:
Memory is configured as output digital voltage signal；
Digital analog converter, the digital analog converter are connect with the memory, the digital analog converter, are configured as institute
Digital voltage signal is stated to be converted to analog voltage signal and export；
Sequence controller；
N voltage signal output end；
Signal trigger circuit is provided with signal input part, n signal triggering end and n signal output end, the signal touching
The signal input part of Power Generation Road is connect with the first output end of the sequence controller, n signal of the signal trigger circuit
Triggering end is connect with the second output terminal of the sequence controller, the signal trigger circuit, when being configured as receiving described
The frame start signal of the first output end output of sequence controller, in the second output terminal output for receiving the sequence controller
When clock signal, from the control signal of one of signal output end output high level in the n signal output end；
Communication switch circuit is provided with n controlled end, n input terminal and n output end, the n of the communication switch circuit
A input terminal is connect with the output end of the digital analog converter, the n controlled end and the signal of the communication switch circuit
N signal output end of trigger circuit connects one to one, n output end of the communication switch circuit and the n voltage
Signal output end connects one to one, the communication switch circuit, is configured as receiving the letter in each controlled end
When the control signal of the high level of number trigger circuit output, reference voltage signal is generated and from output corresponding with the controlled end
End output；Wherein, n is the integer more than or equal to 1.
To achieve the above object, the application also provides a kind of display device, and the display device includes institute any one of as above
The generating circuit from reference voltage stated.
Optionally, the display device further includes display panel, the source electrode drive circuit of the generating circuit from reference voltage
It is connect with the display panel.
The technical solution of the application exports the n of corresponding control signal to communication switch circuit by signal trigger circuit
A controlled end, analog voltage signal the n through communication switch circuit for being exported digital analog converter with communication control switching circuit
Output end is sequentially output.So set, can circuit structure inside facilitating chip, reduce the cost of chip.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for this field
For those of ordinary skill, without creative efforts, the structure that can also be shown according to these attached drawings is obtained
Other attached drawings.
Fig. 1 is the structural block diagram of one embodiment of generating circuit from reference voltage of the present invention；
Fig. 2 is the electrical block diagram of the signal trigger circuit of generating circuit from reference voltage of the present invention；
Fig. 3 is the electrical block diagram of the communication switch circuit of generating circuit from reference voltage of the present invention.
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiment of the application, instead of all the embodiments.Base
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall in the protection scope of this application.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after) in the embodiment of the present application, it should
Directionality instruction is only used for the relative positional relationship explained under a certain particular pose (as shown in the picture) between each component, movement
Situation etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present application
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not this application claims protection scope within.
The application proposes a kind of generating circuit from reference voltage.
Referring to Fig.1, which includes: sequence controller 10, digital analog converter 20, n voltage signal
Output end (figure does not indicate), signal trigger circuit 30 and communication switch circuit 40；The signal of the signal trigger circuit 30 inputs
End is connect with the first output end of the sequence controller 10, and n signal triggering end of the signal trigger circuit 30 is and institute
The second output terminal connection of sequence controller 10 is stated, n signal output end of the signal trigger circuit 30 is opened with the communication
The n controlled end on powered-down road 40 connects one to one；N input terminal of the communication switch circuit 40 with the digital-to-analogue conversion
The output end of device 20 connects, and n output end of the communication switch circuit 40 and the n voltage signal output end correspond
Connection, wherein n is the integer more than or equal to 1.
In the present embodiment, the digital analog converter 20 is configured as reading the digital voltage signal in memory, and by institute
The digital voltage signal of reading is converted to analog voltage signal；
In the present embodiment, the signal trigger circuit 30 is configured as the clock signal exported according to sequence controller 10,
The control signal of high level is exported from one of signal output end in n signal output end, in addition n-1 signal output end
Export low level control signal；
In the present embodiment, the communication switch circuit 40 is configured as receiving the signal in each controlled end
When the control signal of the high level of trigger circuit output, reference voltage signal is generated and from output end corresponding with the controlled end
Output, and when the control signal of the controlled end is low level, it controls the output end and maintains to export the reference voltage letter
Number；
The technical solution of the application, the generating circuit from reference voltage further include source electrode drive circuit (figure does not indicate) and deposit
Reservoir (figure does not indicate), the source electrode drive circuit and the n voltage signal output end, the memory and the digital-to-analogue turn
Parallel operation 20 connects.The generating circuit from reference voltage can be set in the adjustable gamma electric voltage chip of numerical digit.
In order to better illustrate present invention design, by n signal output end of signal trigger circuit 30 respectively with
A1 to An is indicated, n output end of communication switch circuit 40 is indicated respectively with Output 1 to Output n, and A1 to An points
It is not corresponded with Output 1 to Output n.In system starting, the frame start signal that sequence controller 10 exports is height,
And when the second output terminal of sequence controller 10 exports first clock signal, the A1 output end output of signal trigger circuit 30
The control signal of high level, in addition n-1 signal output end exports low level control signal and leads to one-to-one therewith
N controlled end of switching circuit 40 is interrogated, at this point, digital analog converter 20 reads the digital voltage signal in memory and is converted to mould
Quasi- voltage signal, 1 output end of the Output output through communication switch circuit 40, that is, through the output pair of 1 output end of Output
The reference voltage signal answered.Also, it is a pair of with Output 1 to Output n mono- by being arranged inside communication switch circuit 40
The capacitor that should be connected, in 1 output end output reference voltage signal of Output, the capacitor connecting with 1 output end of Output is opened
Begin to charge, sequence controller again drags down frame start signal at this time.When sequence controller 10 exports second clock signal,
The control signal of the A2 output end output high level of signal trigger circuit 30, in addition n-1 signal output end exports low level
Control signal, at this point, digital analog converter 20 export analog voltage signal through communication switch circuit 40 Output 2 export
End output, and the capacitor connecting with 2 output end of Output starts to charge, and exports second clock signal in sequence controller 10
When, although A1 output end exports low level control signal, since the capacitor connecting with 1 output end of Output discharges, lead to
1 output end of Output of news switching circuit 40 continues to export corresponding reference voltage signal, and so on, in timing control
When device 10 exports nth clock signal, the An output end of signal trigger circuit 30 exports the control signal of high level, in addition n-1
A signal output end exports low level control signal, and the Output n output end of communication switch circuit 40 exports corresponding reference
Voltage signal, and Output 1 to Output n-1 continues to output corresponding reference electricity due to the pressure stabilization function of respective capacitor
Signal is pressed, so that Output 1 to Output n exports corresponding reference voltage signal, system can be worked normally, such as
This setting does not need the normal output of reference voltage signal to can be realized, so that system energy using multiple digital analog converters
It is enough to work normally.
The technical solution of the application exports corresponding control signal to communication switch circuit 40 by signal trigger circuit 30
N controlled end, the analog voltage signal exported digital analog converter 20 with communication control switching circuit 40 is through communication switch electricity
The n output end on road 40 is sequentially output.So set, can circuit structure inside facilitating chip, reduce the cost of chip.
Referring to FIG. 1 and FIG. 2, in one embodiment, the signal trigger circuit 30 includes n trigger being linked in sequence,
The clock signal input terminal of each trigger is the signal triggering end of the signal trigger circuit 30, each trigger
Data output end be the signal trigger circuit 30 signal output end, be placed in the data input pin of the first trigger
For the signal input part of the signal trigger circuit 30, and connect with the data output end of the trigger as terminal position
It connects.Also, in two adjacent triggers of position, after being placed in the data output end of the trigger of prior location and being placed in
The data input pin of the trigger of one position connects.
In order to better illustrate the technical solution of the application, the trigger that n is linked in sequence by the present embodiment is with the first touching
Hair device U1 to the n-th trigger Un is indicated, n signal output end of signal trigger circuit 30 is indicated respectively with A1 to An, wherein
First trigger U1 is to be placed in the first trigger, and the n-th trigger Un is the trigger for being placed in terminal position, first triggering
The clock signal input terminal Cn of the trigger Un of clock signal input terminal C1 to n-th of device U1 receives the clock of sequence controller output
Signal, the data output end Dn and communication switch circuit of the trigger Un of data output end D1 to n-th of the first trigger U1
40 n controlled end connects one to one, that is, signal trigger circuit 30 A1 output end to An output end and communication switch
N controlled end of circuit 40 connects one to one, and the number of the data output end Q1 of the first trigger U1 and the second trigger U2
According to input terminal D2 connection, the data output end Q2 of the second trigger U2 is connect with the data input pin D3 of third trigger U3, according to
Secondary to analogize, the data output end Qn-1 of the (n-1)th trigger Un-1 is connect with the data input pin Dn of the n-th trigger Un, the first touching
The data input pin D1 for sending out device U1 receives the frame start signal that sequence controller 10 exports, and defeated with the data of the n-th trigger Un
Outlet Qn connection.
Wherein, n trigger is d type flip flop, and the characteristic of d type flip flop is, as the clock signal input terminal C of d type flip flop
When receiving the rising edge of signal, the value of its data input pin D is assigned to its data output end Q.
Specifically, in the initial state, the frame start signal of the first output end output of sequence controller 10 is height, thus
So that the data input pin D1 of the first trigger U1 is height, when the second output terminal of sequence controller 10 exports first clock letter
Number when, at this point, since the data input pin D1 of the first trigger U1 is height, and the data input pin D2 of the second trigger U2 to the
The data input pin Dn of n trigger Un be it is low, therefore, when first clock signal reaches, the data of the first trigger U1
Output end Q1 is height, i.e. the control signal of A1 output end output high level, and the data output end Q2 to n-th of the second trigger U2
The data output end Qn of trigger Un be it is low, i.e., A2 output end to An output end exports low level control signal.Pass through again
The program setting of sequence controller 10 drags down frame start signal at this time, when sequence controller 10 exports second clock letter
Number when, the data input pin D1 of the first trigger U1 be it is low, data output end Q1 is height, since the data of the first trigger U1 are defeated
Outlet Q1 is connect with the data input pin D2 of the second trigger U2, is equivalent to the data input pin D2 of the second trigger U2 at this time
For height, data output end Q2 be it is low, and the data input pin of third trigger U3 to the n-th trigger Un be it is low, therefore, the
When two clock signals reach, the low level of its data input pin D1 is assigned to its data output end Q1 by the first trigger U1, the
The high level of its data input pin D2 is assigned to its data output end Q2, third trigger U3 to the n-th trigger by two trigger U2
The low level of its data input pin is assigned to its data output end by Un, therefore, when second clock signal reaches, only
Two trigger U2 export the control signal of high level, and in addition n-1 trigger exports low level control signal, with such
It pushes away, when nth clock signal reaches, the n-th trigger Un exports the control signal of high level, in addition the trigger of n-1
Export low level control signal.
Referring to Fig.1, Fig. 2 and Fig. 3, in one embodiment, the communication switch circuit 40 include n switching tube, n capacitor
And n operational amplifier, the controlled end of each switching tube are the controlled end of the communication switch circuit 40, it is each described to open
The input terminal for closing pipe is the input terminal of the communication switch circuit 40, the output end of each switching tube and each operation
The input terminal of amplifier connects one to one, and one end one of the output end of each switching tube and each capacitor is a pair of
It should connect, the output end of each operational amplifier is the output end of the communication switch circuit 40；Each capacitor
Other end ground connection.
In order to preferably describe thought of the invention, by n switching tube with first switch tube M1 to the n-th switching tube Mn table
Show, n operational amplifier is indicated with the first operational amplifier OP1 to the n-th operational amplifier OPn, and by n capacitor with first
Capacitor C1 to the n-th capacitor Cn is indicated.
Wherein, controlled end and the signal trigger circuit 30 of the controlled end of first switch tube M1 to the n-th switching tube Mn
The data output end Qn of the trigger Un of data output end Q1 to n-th of first trigger U1 connects one to one, that is, with letter
A1 output end to the An output end of number trigger circuit 30 connects one to one, and the input terminal of the first switch tube M1 to n-th is opened
The input terminal for closing pipe Mn connect with the output end of digital analog converter 20, and the output end of the first switch tube M1 to n-th switchs
The output end of pipe Mn respectively with the input terminal of the input terminal of the first operational amplifier OP1 to the n-th operational amplifier OPn one by one
Be correspondingly connected with, and the output end of the first switch tube M1 to the n-th switching tube Mn output end respectively with the first capacitor C1
One end of one end to the n-th capacitor Cn connect one to one, the other end of the first capacitor C1 to the n-th capacitor Cn
The other end be grounded.
Specifically, the A1 output end of signal trigger circuit 30 is when sequence controller 10 exports first clock signal
Height, A2 output end to An output end is low, at this point, the first switch tube M1 of communication switch circuit 40 is opened, second switch M2
It is closed to the n-th switching tube Mn, digital analog converter 20 reads the digital voltage signal in memory, and digital voltage signal is converted
N input terminal of communication switch circuit 40 is input to for analog voltage signal, since first switch tube M1 is in an open state at this time,
Second switch M2 to the n-th switching tube Mn is in off state, and the analog voltage signal that digital analog converter 20 exports is to first capacitor
C1 charging, while being exported through the first operational amplifier OP1；When sequence controller 10 exports second clock signal, the letter
The control signal of the A2 output end output high level of number trigger circuit 30, A1 output end and A3 export low level to An output end
Control signal, at this point, the second switch M2 of communication switch circuit 40 is opened, in addition n-1 switching tube is closed, digital-to-analogue conversion
The analog voltage signal that device 20 exports charges to the second capacitor C2, while exporting through second operational amplifier OP2, and due to first
The pressure stabilization function of capacitor C1, although the first operational amplifier OP1 continues to export corresponding at this point, first switch tube M1 is closed
Analog voltage signal, when sequence controller 10 exports third clock signal, third switching tube M3 is opened, digital analog converter 20
The analog voltage signal exported charges to third capacitor C3, while exporting through third operational amplifier OP3, and due to first capacitor
The pressure stabilization function of the pressure stabilization function of C1 and the second capacitor C2, the first operational amplifier OP1 and second operational amplifier OP2 are continued to
Corresponding analog voltage signal is exported, and so on, when sequence controller 10 exports nth clock signal, the n-th operation amplifier
Device OPn exports corresponding analog voltage signal, and the first operational amplifier OP1 to the (n-1)th operational amplifier OPn-1 is because each
It is able to continue to output corresponding analog voltage signal, the i.e. reference voltage signal from the pressure stabilization function of corresponding capacitor, at this point,
System worked well.Wherein, n operational amplifier is equivalent to raising driving energy for exporting after amplifying current signal
Power, so that load can work normally.
In the present embodiment, the n switching tube is N-type insulating properties field-effect tube, the N-type insulating properties field-effect tube
Drain electrode is the input terminal of each switching tube, and the source electrode of the N-type insulating properties field-effect tube is each switching tube
Output end, the grid of the N-type insulating properties field-effect tube are the controlled end of each switching tube.
It is former below in conjunction with the physical circuit of Fig. 1, Fig. 2 and Fig. 3 to the application in order to preferably describe the design of the application
Reason is illustrated:
In system starting, the data input pin D1 of the first trigger U1 receives the frame that sequence controller 10 exports and originates letter
Number for height, when the first trigger U1 receives the rising edge of first clock signal to the n-th trigger Un, the first trigger U1
The control signal of high level is exported, the second trigger U2 to the n-th trigger Un exports low level control signal, to control first
Switching tube M1 is opened, and second switch M2 to the n-th switching tube Mn closes, and the analog voltage signal that digital analog converter 20 exports gives the
It while one capacitor C1 charges, is exported by the first operational amplifier OP1, at this point, second operational amplifier OP2 is to the n-th operation
Amplifier OPn is not exported.The program setting for passing through sequence controller 10 again, frame start signal is dragged down, when the first trigger
When U1 to the n-th trigger Un receives the rising edge of second clock signal, the data input pin D1 of the first trigger U1 be it is low,
Data output end Q1 is height, and the data input pin D2 of the second trigger U2 is connect with the data output end Q1 of the first trigger U1,
Therefore, the data input pin D2 of the second trigger U2 is height, and data output end Q2 is low, third trigger U3 to the n-th trigger
The data input pin of Un be it is low, therefore, when second clock signal reaches, the second trigger U2 exports the control of high level
Signal, in addition n-1 trigger exports low level control signal, at this point, second switch M2 is opened, in addition n-1 is switched
Pipe is closed, through second operational amplifier while the analog voltage signal that digital analog converter 20 exports charges to the second capacitor C2
OP2 output, and due to the pressure stabilization function of first capacitor C1, when the first trigger U1 exports low level control signal, first
Operational amplifier OP1 keeps the output of analog voltage signal, and so on, when the first trigger U1 to the n-th trigger Un is received
To nth clock signal rising edge when, the n-th trigger Un export high level control signal, the first trigger U1 to (n-1)th
Trigger Un-1 exports low level control signal, at this point, the n-th switching tube Mn is opened, in addition n-1 switching tube is closed, number
It is exported while the analog voltage signal that mode converter 20 exports charges to the n-th capacitor Cn through the n-th operational amplifier OPn, and by
In first capacitor C1 to the pressure stabilization function of the (n-1)th capacitor Cn-1, at this point, the first operational amplifier OP1 to the (n-1)th operational amplifier
OPn-1 maintains the output of analog voltage signal, at this point, system can work normally.So set, not needing portion in the chip
Per export all the way configuration one digital analog converter 20, simplify the circuit structure of chip interior, reduce the cost of chip.
The application also proposes that a kind of display device, the display device include as above described in any item reference voltages generations
Circuit and display panel, the source electrode drive circuit of the generating circuit from reference voltage are electrically connected with the display panel.The reference
The detailed construction of voltage generation circuit can refer to above-described embodiment, and details are not described herein again；It is understood that due in the application
Above-mentioned generating circuit from reference voltage is used in display device, therefore, the embodiment of the application display device includes above-mentioned reference
Whole technical solutions of voltage generation circuit whole embodiments, and technical effect achieved is also identical, it is no longer superfluous herein
It states.
In the present embodiment, display device can be television set, tablet computer, mobile phone etc. and fill with the display of display panel
It sets.The display panel can be following any: liquid crystal display panel, OLED display panel, QLED display panel, twisted-nematic
(Twisted Nematic, TN) or super twisted nematic (Super Twisted Nematic, STN) type, plane conversion (In-
Plane Switching, IPS) type, vertical orientation (Vertical Alignment, VA) type, curved face type panel or other are aobvious
Show panel.
The foregoing is merely the alternative embodiments of the application, are not intended to limit the scope of the patents of the application, all at this
Under the inventive concept of application, using equivalent structure transformation made by present specification and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the application.
Claims (10)
1. a kind of generating circuit from reference voltage, which is characterized in that the generating circuit from reference voltage includes:
Digital analog converter is configured as output analog voltage signal；
Sequence controller；
N voltage signal output end；
Signal trigger circuit is provided with signal input part, n signal triggering end and n signal output end, the signal triggering electricity
The signal input part on road is connect with the first output end of the sequence controller, the n signal triggering of the signal trigger circuit
End is connect with the second output terminal of the sequence controller, and the signal trigger circuit is configured as receiving the timing control
The frame start signal of the first output end output of device processed, in the clock for the second output terminal output for receiving the sequence controller
When signal, from the control signal of one of signal output end output high level in the n signal output end；
Communication switch circuit, is provided with n controlled end, n input terminal and n output end, and n of the communication switch circuit are defeated
Enter end to connect with the output end of the digital analog converter, the n controlled end and the signal of the communication switch circuit trigger
N signal output end of circuit connects one to one, n output end of the communication switch circuit and the n voltage signal
Output end connects one to one, the communication switch circuit, is configured as receiving the signal touching in each controlled end
When the control signal of the high level of Power Generation Road output, generation reference voltage signal is simultaneously defeated from output end corresponding with the controlled end
Out；Wherein, n is the integer more than or equal to 1.
2. generating circuit from reference voltage as described in claim 1, which is characterized in that the signal trigger circuit includes that sequence connects
The n trigger connect, the clock signal input terminal of each trigger are the signal triggering end of the signal trigger circuit, often
The data output end of one trigger is the signal output end of the signal trigger circuit, is placed in the first trigger
Data input pin is the signal input part of the signal trigger circuit, and defeated with the data of the trigger as terminal position
Outlet connection.
3. generating circuit from reference voltage as claimed in claim 2, which is characterized in that in two adjacent triggers of position,
The data input pin of the data output end and the trigger for being placed in latter position that are placed in the trigger of prior location connects
It connects.
4. generating circuit from reference voltage as described in claim 1, which is characterized in that the either signal of the signal trigger circuit
When output end exports the control signal of high level, in addition n-1 signal output end exports low level control signal.
5. generating circuit from reference voltage as described in claim 1, which is characterized in that the communication switch circuit includes n and opens
Guan Guan, n capacitors and n operational amplifier, the controlled end of each switching tube are the controlled end of the communication switch circuit,
The input terminal of each switching tube be the communication switch circuit input terminal, the output end of each switching tube with it is each
The input terminal of the operational amplifier connects one to one, and the one of the output end of each switching tube and each capacitor
End connects one to one, and the output end of each operational amplifier is the output end of the communication switch circuit；It is each described
The other end of capacitor is grounded.
6. generating circuit from reference voltage as claimed in claim 5, which is characterized in that and described when the switching tube is opened
The operation amplifier that the capacitor of the output end connection of switching tube charges, and connect with the output end of the switching tube
Device exports the reference voltage signal；
When the switching tube is closed, the capacitor connecting with the output end of the switching tube discharges, and opens with described
The operational amplifier for closing the output end connection of pipe maintains to export the reference voltage signal.
7. generating circuit from reference voltage as described in claim 1, which is characterized in that the generating circuit from reference voltage further includes
Source electrode drive circuit, the source electrode drive circuit are connect with the n voltage signal output end.
8. a kind of generating circuit from reference voltage is applied to the adjustable gamma electric voltage chip of numerical digit, which is characterized in that the reference voltage
Generation circuit includes:
Memory is configured as output digital voltage signal；
Digital analog converter, the digital analog converter are connect with the memory, the digital analog converter, are configured as the number
Word voltage signal is converted to analog voltage signal and exports；
Sequence controller；
N voltage signal output end；
Signal trigger circuit is provided with signal input part, n signal triggering end and n signal output end, the signal triggering electricity
The signal input part on road is connect with the first output end of the sequence controller, the n signal triggering of the signal trigger circuit
End is connect with the second output terminal of the sequence controller, and the signal trigger circuit is configured as receiving the timing control
The frame start signal of the first output end output of device processed, in the clock for the second output terminal output for receiving the sequence controller
When signal, from the control signal of one of signal output end output high level in the n signal output end；
Communication switch circuit, is provided with n controlled end, n input terminal and n output end, and n of the communication switch circuit are defeated
Enter end to connect with the output end of the digital analog converter, the n controlled end and the signal of the communication switch circuit trigger
N signal output end of circuit connects one to one, n output end of the communication switch circuit and the n voltage signal
Output end connects one to one, the communication switch circuit, is configured as receiving the signal touching in each controlled end
When the control signal of the high level of Power Generation Road output, generation reference voltage signal is simultaneously defeated from output end corresponding with the controlled end
Out；Wherein, n is the integer more than or equal to 1.
9. a kind of display device, which is characterized in that the display device includes reference as claimed in any one of claims 1 to 8
Voltage generation circuit.
10. display device as claimed in claim 9, which is characterized in that the display device further includes display panel, the ginseng
The source electrode drive circuit for examining voltage generation circuit is connect with the display panel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811595734.3A CN109509420B (en) | 2018-12-25 | 2018-12-25 | Reference voltage generating circuit and display device |
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| CN201811595734.3A CN109509420B (en) | 2018-12-25 | 2018-12-25 | Reference voltage generating circuit and display device |
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| CN109509420A true CN109509420A (en) | 2019-03-22 |
| CN109509420B CN109509420B (en) | 2021-11-30 |
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| CN110379383A (en) * | 2019-06-10 | 2019-10-25 | 惠科股份有限公司 | Generating circuit from reference voltage and display device |
| CN112542146A (en) * | 2020-11-03 | 2021-03-23 | 惠科股份有限公司 | Logic operation circuit and display driving circuit |
| CN113178174A (en) * | 2021-03-22 | 2021-07-27 | 重庆惠科金渝光电科技有限公司 | Grid driving module, grid control signal generation method and display device |
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| CN109509420B (en) | 2021-11-30 |
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