CN108735173A - Gamma voltage generating apparatus and liquid crystal display device - Google Patents
Gamma voltage generating apparatus and liquid crystal display device Download PDFInfo
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- CN108735173A CN108735173A CN201810514835.7A CN201810514835A CN108735173A CN 108735173 A CN108735173 A CN 108735173A CN 201810514835 A CN201810514835 A CN 201810514835A CN 108735173 A CN108735173 A CN 108735173A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 27
- 230000005611 electricity Effects 0.000 claims description 20
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
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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
-
- 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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention provides a kind of gamma voltage generating apparatus, including first group of voltage generation circuit, second group of voltage generation circuit, control circuit and selection circuit.First generation circuit is for providing first group of gamma electric voltage.Second group of voltage generation circuit is for providing second group of gamma electric voltage.Control circuit obtains the display pattern that will show picture and generates corresponding control signal according to pattern.Selection circuit exports first group of gamma electric voltage or second group of gamma electric voltage to source electrode drive circuit for receiving first group of gamma electric voltage and second group of gamma electric voltage, and according to control signal positive sequence or backward.The present invention also provides a kind of liquid crystal display devices.The gamma voltage generating apparatus and liquid crystal display device of the present invention, the corresponding control signal that can be generated according to display pattern, gamma voltage generating apparatus positive sequence or backward export corresponding one group of gamma electric voltage in multigroup gamma electric voltage, and it is supplied to source electrode drive circuit, it is provided a convenient for configuration, saves layout occupied space.
Description
Technical field
The present invention relates to field of liquid crystal display more particularly to a kind of gamma voltage generating apparatus and liquid crystal display device.
Background technology
Liquid crystal display device (Liquid Crystal Display, LCD) has good, small, light-weight, the low drive of image quality
It the advantages that dynamic voltage, low-power consumption, relatively low radiationless and manufacturing cost, occupies an leading position at present in flat display field.Its
Be widely used in desktop computer, palmtop computer, personal digital assistant (Personal Digital Assistant,
PDA), in a variety of office automations such as portable phone, TV box and audio-visual equipment.
Currently, the demand to liquid crystal display device image quality is higher and higher, liquid crystal display device is frequently necessary in difference
Display pattern under operate, such as wide viewing angle, narrow viewing angle isotype, different groups of gamma electricity is needed under different display patterns
Pressure.However, existing source electrode drive circuit may be such that picture generates different when switching the display pattern internal gamma electric voltage of calling
Often, such as there is split screen in picture, to influence the display image quality of liquid crystal display device.
Invention content
In view of this, present invention aims at a kind of gamma voltage generating apparatus is provided, source electrode drive circuit can be solved
When switching the display pattern internal gamma electric voltage of calling, picture leads to the problem of abnormal.
Specifically, the present invention provides a kind of gamma voltage generating apparatus, including first group of voltage generation circuit, second group of electricity
Press generation circuit, control circuit and selection circuit.First group of voltage generation circuit is for providing first group of gamma electric voltage, institute
It includes n voltage output end to state first group of voltage generation circuit, wherein n is positive integer.Second group of voltage generation circuit is used
In providing second group of gamma electric voltage, second group of voltage generation circuit includes n voltage output end.The control circuit obtains
It will show the display pattern of picture and corresponding control signal is generated according to the display pattern, the control signal includes first
Control signal and second control signal.The selection circuit includes n voltage output end, and the selection circuit is described for receiving
First group of gamma electric voltage and second group of gamma electric voltage, and according to it is described control signal the selection circuit n voltage output
Rectify sequence or backward exports first group of gamma electric voltage or second group of gamma electric voltage to source electrode drive circuit.
Preferably, the selection circuit includes n sub- selection circuits, and the sub- selection circuit includes first input end, the
Two input terminals, third input terminal, the 4th input terminal, first choice end, the second selection end and output end, m-th of sub- selection
The first input end of circuit is connected with m-th of voltage output end of first group of voltage generation circuit, m-th of son selection
Second input terminal of circuit is connected with the n-th-m+1 of first group of voltage generation circuit voltage output ends, m-th of son
The third input terminal of selection circuit is connected with m-th of voltage output end of second group of voltage generation circuit, m-th of son selection
4th input terminal of circuit is connected with the n-th-m+1 of second group of voltage generation circuit voltage output ends, m-th of son selection
The first choice end of circuit receives the first control signal, and the second of m-th of sub- selection circuit selects described in the reception of end
The output end of second control signal, m-th of sub- selection circuit is believed according to the first control signal and second control
The voltage on an input terminal in the first input end to the 4th input terminal of number selection m-th of sub- selection circuit carries out defeated
Go out；Wherein, m is less than or equal to n, and m is positive integer.
Preferably, described m-th sub- selection circuit include first switching element, second switch element, third switch element,
4th switch element, the first logic unit, the second logic unit, third logic unit, the 4th logic unit, the 5th logic list
Member, the 5th switch element, the 6th switch element, the 7th switch element and the 8th switch element.First logic unit includes
First input end, the second input terminal and output end, the first input end of first logic unit by first resistor with it is described
First control terminal of m-th of sub- selection circuit is connected, and the second input terminal of first logic unit passes through second resistance and institute
The second control terminal for stating m-th of sub- selection circuit is connected.The first switching element include the first control terminal, the first path terminal and
Alternate path end, the first control terminal of the first switching element are connected with the output end of first logic unit, and described
First path terminal of one switch element is connected by 3rd resistor with the first power supply, the alternate path end of the first switching element
Ground connection.The second switch element includes the second control terminal, third path end and fourth passage end, the second switch element
Second control terminal is connected with the first path terminal of the first switching element, the third path end of the second switch element and institute
The first input end for stating m-th of sub- selection circuit is connected, and the fourth passage end of the first switching element is selected with described m-th son
The output end for selecting circuit is connected.Second logic unit includes first input end, the second input terminal and output end, and described second
The first input end of logic unit is connected with the first input end of first logic unit, and the second of second logic unit
Input terminal is connected with the second input terminal of first logic unit.The third switch element includes third control terminal, the 5th
Path terminal and the 6th path terminal, the output end phase of the third control terminal of the third switch element and first logic unit
Even, the fifth passage end of the third switch element is connected by the 4th resistance with second source, the third switch element
6th path terminal is grounded.4th switch element include the 4th control terminal, the 7th path terminal and the 8th path terminal, the described 4th
4th control terminal of switch element is connected with the fifth passage end of the third switch element, and the 7th of the 4th switch element the
Path terminal is connected with the third input terminal of described m-th sub- selection circuit, the 8th path terminal of the 4th switch element and institute
The fourth passage end for stating second switch element is connected.The third logic unit includes first input end, the second input terminal and defeated
Outlet, the first input end of the third logic unit are connected with the first input end of first logic unit, the third
Second input terminal of logic unit is connected with the second input terminal of first logic unit.4th logic unit includes the
One input terminal, the second input terminal and output end, first input end and the first switching element of the 4th logic unit
First path terminal is connected, and the second input terminal of the 4th logic unit is connected with the output end of the third logic unit.Institute
It includes first input end, the second input terminal and output end, the first input end of the 5th logic unit to state the 5th logic unit
It is connected with the 4th control terminal of the 4th switch element, the second input terminal and the third logic of the 5th logic unit
The output end of unit is connected.5th switch element includes the 5th control terminal, the 9th path terminal and the tenth path terminal, and described the
5th control terminal of five switch elements is connected by the 5th resistance with the output end of the 4th logic unit, the 5th switch
9th path terminal of element is connected by the 6th resistance with third power supply, the tenth path terminal ground connection of the 5th switch element.
6th switch element includes the 6th control terminal, the 11st path terminal and the 12nd path terminal, the 6th switch element
6th control terminal is connected with the 9th path terminal of the 5th switch element, the 11st path terminal of the 6th switch element with
Second input terminal of m-th of sub- selection circuit is connected, the 12nd path terminal and described second of the 6th switch element
The fourth passage end of switch element is connected.7th switch element includes the 7th control terminal, the tenth threeway terminal and the 14th
Path terminal, the output end phase that the 7th control terminal of the 7th switch element passes through the 7th resistance and the 5th logic unit
Even, the tenth threeway terminal of the 7th switch element is connected by the 8th resistance with the 4th power supply, the 7th switch element
The 14th path terminal ground connection.8th switch element includes the 8th control terminal, the 15th path terminal and the 16th path terminal,
8th control terminal of the 8th switch element is connected with the tenth threeway terminal of the 7th switch element, the 8th switch
15th path terminal of element is connected with the 4th input terminal of described m-th sub- selection circuit, and the of the 8th switch element
16 path terminals are connected with the fourth passage end of the second switch element.
Preferably, the first switching element, the third switch element, the 5th switch element and the described 7th are opened
Pass element is NPN type triode, the second switch element, the 4th switch element, the 6th switch element and described
8th switch element is P-channel technotron.
Preferably, when the first input end and the second input terminal of first logic unit receive high level signal simultaneously,
The output end of first logic unit exports high level signal, the first input end of first logic unit and the second input
When receiving high level signal when holding different, the output end of first logic unit exports low level signal.Second logic
When the first input end of unit receives low level signal and simultaneously the second input terminal reception high level signal, the second logic list
The output end of member exports high level signal, and the first input end of second logic unit does not receive low level signal or second defeated
Enter end when not receiving high level signal, the output end of second logic unit exports low level signal.The third logic list
When the first input end and the second input terminal of member receive high level signal or receive low level signal simultaneously simultaneously, the third is patrolled
The output end of volume unit exports high level signal, and when first input end and the second input terminal difference of the third logic unit connects
When receiving high level signal or receiving low level signal simultaneously, the output end of the third logic unit exports low level signal.Institute
It states the first input end of the 4th logic unit and the second input terminal while receiving high level signal or receiving low level signal simultaneously
When, the output end of the 4th logic unit exports high level signal, the first input end and second of the 4th logic unit
When receiving high level signal when input terminal difference or receiving low level signal simultaneously, the output end output of the 4th logic unit
Low level signal.The first input end and the second input terminal of 5th logic unit receive high level signal or connect simultaneously simultaneously
When receiving low level signal, the output end output low level signal of the 5th logic unit, the first of the 5th logic unit
When receiving high level signal when input terminal and the second input terminal difference or receiving low level signal simultaneously, the 5th logic unit
Output end export high level signal.
Preferably, first group of voltage generation circuit includes first resistor string, and the first resistor string includes n+1 the
The first end of one divider resistance, the first resistor string receives the first DC voltage, and the second end of the first resistor string is grounded,
The common end of the first divider resistance of each two is connected with n voltage output end of first group of voltage generation circuit.
Preferably, second group of voltage generation circuit includes second resistance string, and the second resistance string includes n+1 the
The first end of two divider resistances, the second resistance string receives the second DC voltage, and the second end of the second resistance string is grounded,
The common end of the second divider resistance of each two is connected with n voltage output end of second group of voltage generation circuit.
Preferably, the control signal includes third control signal, and second group of voltage generation circuit includes programmable
Gamma electric voltage buffer circuit, the programmable gamma electric voltage buffer circuit include that n voltage output end is second group of voltage
The n voltage output end of generation circuit, the programmable gamma electric voltage buffer circuit is for buffering at least one set of gamma electricity
Pressure, and corresponding one group of gamma electric voltage in signal output at least one set of gamma electric voltage is controlled according to the third.
The present invention also provides a kind of liquid crystal display device, liquid crystal display device includes above-mentioned gamma voltage generating apparatus.
Preferably, when the liquid crystal display device is wide viewing angle display pattern, the first control signal is high level
And the second control signal is high level, then the gamma voltage generating apparatus positive sequence exports first group of gamma electric voltage, or
The first control signal is low level and the second control signal is low level, then the gamma voltage generating apparatus backward
Export first group of gamma electric voltage；
When the liquid crystal display device is narrow viewing angle display pattern, the first control signal is low level and described the
Two control signals are high level, then the gamma voltage generating apparatus positive sequence exports second group of gamma electric voltage or described first
Control signal is high level and the second control signal is low level, then the gamma voltage generating apparatus backward output second
Group gamma electric voltage.
The gamma voltage generating apparatus and liquid crystal display device of the present invention, the corresponding control that can be generated according to display pattern are believed
Number, gamma voltage generating apparatus positive sequence or backward export corresponding one group of gamma electric voltage in multigroup gamma electric voltage, and are supplied to source
Pole driving circuit, provides a convenient for configuration, saves layout occupied space.
For the above and other objects, features and advantages of the present invention can be clearer and more comprehensible, preferred embodiment cited below particularly,
And coordinate institute's accompanying drawings, it is described in detail below.
Description of the drawings
Fig. 1 is the circuit connection diagram for the gamma voltage generating apparatus that first embodiment provides.
Fig. 2 is the circuit connection diagram for the sub- selection circuit that first embodiment provides.
Fig. 3 is the circuit connection diagram for the gamma voltage generating apparatus that second embodiment provides.
Fig. 4 is the circuit connection diagram for the gamma voltage generating apparatus that 3rd embodiment provides.
Specific implementation mode
Further to illustrate that the present invention is the technological means and effect realized expected purpose and taken, below in conjunction with attached drawing
And preferred embodiment, to the specific implementation mode of the gamma voltage generating apparatus and liquid crystal display device that propose according to the present invention,
Method, step, structure, feature and effect are described in detail as after.
For the present invention aforementioned and other technology contents, feature and effect, in following cooperation with reference to the preferable reality of schema
Applying in the detailed description of example to be clearly presented.By the explanation of specific implementation mode, when expection can be reached to the present invention
The technological means and effect that purpose is taken be able to more deeply and it is specific understand, however institute's accompanying drawings be only to provide with reference to
Purposes of discussion is not intended to limit the present invention.
First embodiment
Fig. 1 is the circuit connection diagram for the gamma voltage generating apparatus that first embodiment provides.Referring to FIG. 1, first implements
The gamma voltage generating apparatus of example includes first group of voltage generation circuit 100, second groups of voltage generation circuits 200, control circuits
300 and selection circuit 400.First group of voltage generation circuit 100 generates electricity for providing first group of gamma electric voltage, first group of voltage
Road 100 includes n voltage output end (being 101 in figure, 102...10n), wherein n is positive integer.Second group of voltage generation circuit
200 for providing second group of gamma electric voltage, second group of voltage generation circuit 200 include n voltage output end (be 201 in figure,
202...20n).Control circuit 300 obtains the display pattern that will show picture and generates corresponding control letter according to display pattern
Number, control signal includes first control signal and second control signal.Selection circuit 400 (is in figure including n voltage output end
401,402...40n), selection circuit 400 is believed for receiving first group of gamma electric voltage and second group of gamma electric voltage, and according to control
Number first group of gamma electric voltage or second group of gamma electric voltage are exported to source electrode drive circuit in n voltage output end positive sequence or backward
500。
Specifically, first group of voltage generation circuit 100 is connected with selection circuit 400, for providing first group of gamma electric voltage
To selection circuit 400, n gamma electric voltage is exported extremely specifically by n voltage output end of first group of voltage generation circuit 100
1st voltage output end 101 of selection circuit 400, such as first group voltage generation circuit 100 exports gamma electric voltage V1A, the 2nd voltage
Output end 102 exports gamma electric voltage V2A, successively sequence, the n-th voltage output end 10n output gamma electric voltages VnA.Second group of voltage
Generation circuit 200 is connected with selection circuit 400, for providing second group of gamma electric voltage to selection circuit 400, specifically by the
N voltage output end of two groups of voltage generation circuits 200 exports n gamma electric voltage to selection circuit 400, and such as second group of voltage produces
1st voltage output end 201 of raw circuit 200 exports gamma electric voltage V1B, and the 2nd voltage output end 202 exports gamma electric voltage V2B, according to
Secondary sequence, the n-th voltage output end 20n output gamma electric voltages VnB.To which selection circuit 400 can receive first group of gamma electric voltage
N gamma electric voltage and second group of gamma electric voltage n gamma electric voltage.And selection circuit 400 is connected with control circuit 300, connects
Control circuit 300 is received to obtain the display pattern that will show picture and generate corresponding control signal, control letter according to display pattern
Number include first control signal and second control signal.
Selection circuit 400 can be exported according to n voltage output end positive sequence or backward of the signal in selection circuit 400 is controlled
First group of gamma electric voltage or second group of gamma electric voltage are to source electrode drive circuit 500.Specifically, selection circuit 400 can with but not office
Be limited to receive control signal first control signal be high level and control signal second control signal be high level when,
Positive sequence exports first group of gamma electric voltage, i.e. the 1st voltage output end 401 of selection circuit 400 exports the gal of first group of gamma electric voltage
Horse voltage V1A, the 2nd voltage output end 402 export the gamma electric voltage V2A of first group of gamma electric voltage, and sequence, the n-th voltage are defeated successively
Outlet 40n exports the gamma electric voltage VnA of first group of gamma electric voltage.Selection circuit 400 can with but be not limited to receiving control
The first control signal of signal is low level and controls the second control signal of signal when being low level, and backward exports first group of gal
Horse voltage, i.e. the 1st voltage output end 401 of selection circuit 400 export the gamma electric voltage VnA of first group of gamma electric voltage, the 2nd voltage
Output end 402 exports the gamma electric voltage Vn-1A of first group of gamma electric voltage, successively sequence, the n-th voltage output end 40n outputs first
The gamma electric voltage V1A of group gamma electric voltage.Selection circuit 400 can with but be not limited to receiving control signal first control believe
Number it is low level and when to control the second control signal of signal be high level, positive sequence exports second group of gamma electric voltage, i.e. selection electricity
1st voltage output end 401 on road 400 exports the gamma electric voltage V1B of first group of gamma electric voltage, the 2nd voltage output end 402 output the
The gamma electric voltage V2B of two groups of gamma electric voltages, sequence, the n-th voltage output end 40n export the gamma electricity of second group of gamma electric voltage successively
Press VnB.Selection circuit 400 can using but be not limited to receiving control signal first control signal be high level and control letter
Number second control signal be low level when, backward export second group of gamma electric voltage, such as the 1st voltage output of selection circuit 400
The gamma electric voltage VnB of 401 second group of gamma electric voltage of output of end, the 2nd voltage output end 402 export the gamma of second group of gamma electric voltage
Voltage Vn-1B, sequence, the n-th voltage output end 40n export the gamma electric voltage V1B of second group of gamma electric voltage successively.
In one embodiment, control circuit 300 can with but be not limited to be a microcontroller (MCU,
Microcontrollers)。
In one embodiment, selection circuit 400 includes n sub- selection circuits 410, and sub- selection circuit 410 includes first defeated
Enter end 411, the second input terminal 412, third input terminal 413, the 4th input terminal 414, the first control terminal 415, the second control terminal 416
With output end 417.M-th of electricity of the first input end 411 of m-th of sub- selection circuit 410 and first group of voltage generation circuit 100
Output end is pressed to be connected, the n-th-m+ of the second input terminal 412 and first group of voltage generation circuit 100 of m-th of sub- selection circuit 410
1 voltage output end is connected, the third input terminal 413 of m-th sub- selection circuit 410 and second group of voltage generation circuit 200
M-th of voltage output end is connected, the 4th input terminal 414 and second group of voltage generation circuit 200 of m-th of sub- selection circuit 410
The n-th-m+1 voltage output ends be connected, the first choice end 415 of m-th of sub- selection circuit 410 receives first control signal,
Second selection end 416 of m-th of sub- selection circuit 410 receives second control signal, the output end of m-th of sub- selection circuit 410
417 select the first input end 411 to the 4th of m-th of sub- selection circuit 410 according to first control signal and second control signal
The voltage on an input terminal in input terminal 414 is exported；Wherein, m is less than or equal to n, and m is positive integer.
In one embodiment, sub- selection circuit 410 includes first switching element T1, second switch element T2, third switch
Element T3, the 4th switch element T4, the first logic unit C1, the second logic unit C2, third logic unit C3, the 4th logic list
First C4, the 5th logic unit C5, the 5th switch element T5, the 6th switch element T6, the switch members of the 7th switch element T7 and the 8th
Part T8.
Fig. 2 is the circuit connection diagram for the sub- selection circuit 410 that first embodiment provides.In the present embodiment, with selection circuit
For 400 m-th of sub- selection circuit 410, m is positive integer.First logic unit C1 includes first input end, the second input terminal
And output end, the first input end of the first logic unit C1 pass through first resistor R1 and the first of m-th of sub- selection circuit 410 and select
End 415 is selected to be connected, the second input terminal of the first logic unit C1 pass through second resistance R2 and m-th sub- selection circuit 410 the
Two selection ends 416 are connected.First switching element T1 includes the first control terminal, the first path terminal and alternate path end, first switch
The first control terminal of element T1 is connected with the output end of the first logic unit C1, and the first path terminal of first switching element T1 passes through
3rd resistor R3 and the first power supply VDD1It is connected, the alternate path end ground connection of first switching element T1.Second switch element T2 includes
Second control terminal, third path end and fourth passage end, the second control terminal and the first switching element T1 of second switch element T2
The first path terminal be connected, the first input end at the third path end and m-th of sub- selection circuit 410 of second switch element T2
411 are connected, and the fourth passage end of first switching element T1 is connected with the output end 417 of m-th of sub- selection circuit 410.Second patrols
It includes first input end, the second input terminal and output end to collect unit C2, and the first input end of the second logic unit C2 is patrolled with first
The first input end for collecting unit C1 is connected, the second input of the second input terminal of the second logic unit C2 and the first logic unit C1
End is connected.Third switch element T3 includes third control terminal, fifth passage end and the 6th path terminal, and the of third switch element T3
Three control terminals are connected with the output end of the first logic unit C1, and the fifth passage end of third switch element T3 passes through the 4th resistance R4
With second source VDD2It is connected, the 6th path terminal ground connection of third switch element T3.4th switch element T4 includes the 4th control
End, the 7th path terminal and the 8th path terminal, the 4th control terminal of the 4th switch element T4 are logical with the 5th of third switch element T3 the
Terminal is connected, and the 7th path terminal of the 4th switch element T4 is connected with the third input terminal 413 of m-th of sub- selection circuit 410, the
The 8th path terminal of four switch element T4 is connected with the fourth passage end of second switch element T2.
Third logic unit C3 includes first input end, the second input terminal and output end, and the first of third logic unit C3
Input terminal is connected with the first input end of the first logic unit C1, the second input terminal of third logic unit C3 and the first logic list
The second input terminal of first C1 is connected.4th logic unit C4 includes first input end, the second input terminal and output end, the 4th logic
The first input end of unit C4 is connected with the first path terminal of first switching element T1, the second input terminal of the 4th logic unit C4
It is connected with the output end of third logic unit C3.5th logic unit C5 includes first input end, the second input terminal and output end,
The first input end of 5th logic unit C5 is connected with the 4th control terminal of the 4th switch element T4, and the of the 5th logic unit C5
Two input terminals are connected with the output end of third logic unit C3.5th switch element T5 includes the 5th control terminal, the 9th path terminal
The output end for passing through the 5th resistance R5 and the 4th logic unit C4 with the tenth path terminal, the 5th control terminal of the 5th switch element T5
It is connected, the 9th path terminal of the 5th switch element T5 passes through the 6th resistance R6 and third power supply VDD3It is connected, the 5th switch element T5
The tenth path terminal ground connection.6th switch element T6 include the 6th control terminal, the 11st path terminal and the 12nd path terminal, the 6th
The 6th control terminal of switch element T6 is connected with the 9th path terminal of the 5th switch element T5, and the 11st of the 6th switch element T6 the
Path terminal is connected with the second input terminal 412 of m-th of sub- selection circuit 410, the 12nd path terminal of the 6th switch element T6 with
The fourth passage end of second switch element T2 is connected.7th switch element T7 includes the 7th control terminal, the tenth threeway terminal and the
14 path terminals, the output end phase that the 7th control terminal of the 7th switch element T7 passes through the 7th resistance R7 and the 5th logic unit C5
Even, the tenth threeway terminal of the 7th switch element T7 passes through the 8th resistance R8 and the 4th power supply VDD4It is connected, the 7th switch element T7
The 14th path terminal ground connection.8th switch element T8 includes the 8th control terminal, the 15th path terminal and the 16th path terminal, the
The 8th control terminal of eight switch element T8 is connected with the tenth threeway terminal of the 7th switch element T7, and the of the 8th switch element T8
15 path terminals are connected with the 4th input terminal 414 of m-th of sub- selection circuit 410, the 16th access of the 8th switch element T8
End is connected with the fourth passage end of second switch element T2.
In the present embodiment, the first power supply VDD1To the 4th power supply VDD4Can with but be not limited to provide refer to high level.
Specifically, the sub- selection circuit 410 of the present embodiment selects end 416 to receive respectively by first choice end 415, second
First control signal, second control signal to control first switching element T1 to the switch of the 8th switch element T8, and make
The second switch element T2 of sub- selection circuit 410, the 4th switch element T4, the 6th switch element T6, the 8th switch element T8 phases
Answer ground only there are one being connected, then 417 output 411 to the 4th input terminals 414 of first input end of the output end of sub- selection circuit 410
In one input terminal of correspondence on voltage, i.e., first group of connected voltage generation circuit 100 or second group of voltage generation circuit
Voltage on 200 relevant voltage output end.And selection circuit 400 includes multiple sub- selection circuits 410, then selection circuit 400
All sub- selection circuits 410 by first choice end 415, second select end 416 receive first control signal, second respectively
After controlling signal, the output end 417 of all sub- selection circuits 410 all only exports in 411 to the 4th input terminal 414 of first input end
One input terminal of correspondence on voltage, and in the sub- selection circuit of the output end 417 to the n-th of the 1st sub- selection circuit 410 410
When output end 417 all only exports the voltage on first input end 411, the 1st voltage output end 401 of selection circuit 400 corresponds to defeated
Go out the gamma electric voltage V1A in first group of gamma electric voltage of first group of voltage generation circuit 100 offer, the 2nd voltage output end 402 is right
The gamma electric voltage V2A in first group of gamma electric voltage of first group of voltage generation circuit 100 offer should be exported, successively sequence, the n-th electricity
Output end 40n is pressed to correspond to the gamma electric voltage VnA for first group of gamma electric voltage that first group of voltage generation circuit 100 of output provides, then
Selection circuit 400 is that positive sequence exports first group of gamma electric voltage that the first generation circuit provides to source electrode drive circuit 500.Similarly,
The second input terminal is all only exported in the output end 417 of the sub- selection circuit of the output end 417 to the n-th of the 1st sub- selection circuit 410 410
When voltage on 412, selection circuit 400 is that backward exports first group of gamma electric voltage that the first generation circuit provides to source drive
Circuit 500；Is all only exported in the output end 417 of the sub- selection circuit of the output end 417 to the n-th of the 1st sub- selection circuit 410 410
When voltage on three input terminals 413, selection circuit 400 is that positive sequence exports second group that second group of voltage generation circuit 200 provides
Gamma electric voltage is to source electrode drive circuit 500；In the defeated of the sub- selection circuit of the output end 417 to the n-th of the 1st sub- selection circuit 410 410
When outlet 417 all only exports the voltage on the 4th input terminal 414, selection circuit 400 is that backward exports second group of voltage generation electricity
Second group of gamma electric voltage that road 200 provides is to source electrode drive circuit 500.
In one embodiment, first switching element T1, third switch element T3, the switch members of the 5th switch element T5 and the 7th
Part T7 can with but be not limited to NPN type triode, or NMOS tube etc., second switch element T2, the 4th switch member
Part T4, the 6th switch element T6 and the 8th switch element T8 can with but be not limited to P-channel technotron, or
PNP type triode or PMOS tube etc..
In one embodiment, the first logic unit C1 can with but be not limited to its first input end and the second input terminal simultaneously
When receiving high level signal, the output end of the first logic unit C1 exports high level signal, and the first of the first logic unit C1 is defeated
When entering reception high level signal when holding different with the second input terminal, the output end of the first logic unit C1 exports low level signal.
Second logic unit C2 can with but be not limited to that first input end receives low level signal and the second input terminal receives high electricity simultaneously
When ordinary mail, the output end of the second logic unit C2 exports high level signal, and the first input end of the second logic unit C2 does not connect
When receipts low level signal or the second input terminal do not receive high level signal, the output end output low level letter of the second logic unit C2
Number, the second logic unit C2 can also be a first logic unit C1 and be set before the first input end of the first logic unit C1
It is equipped with the combination of inversion device etc. inverted for electrical level polar.Third logic unit C3 can with but be not limited to its first input
When end and the second input terminal receive high level signal or receive low level signal simultaneously simultaneously, the output end of third logic unit C3
High level signal is exported, high level signal or same is received when the first input end and the second input terminal difference of third logic unit C3
When receiving low level signal, the output end of third logic unit C3 exports low level signal.4th logic unit C4 can with but
When being not limited to its first input end and the second input terminal while receiving high level signal or receiving low level signal simultaneously, the 4th
The output end of logic unit C4 exports high level signal, when the first input end and the second input terminal difference of the 4th logic unit C4
When receiving high level signal or receiving low level signal simultaneously, the output end of the 4th logic unit C4 exports low level signal.The
Five logic unit C5 can with but be not limited to its first input end and the second input terminal while receiving high level signal or connect simultaneously
When receiving low level signal, the output end of the 5th logic unit C5 exports low level signal, the first input of the 5th logic unit C5
When receiving high level signal when end is different with the second input terminal or receiving low level signal simultaneously, the output of the 5th logic unit C5
End output high level signal, the 5th logic unit C5 can also be a third logic unit C3 and in third logic unit C3
Output end is provided with the combination of inversion device etc. inverted for electrical level polar.
Specifically, the first control signal which receives at first choice end 415 is high level and second
When the second control signal that selection end 416 receives is high level, the first input end of the first logic unit C1 passes through first resistor
It is high level that R1, which receives first control signal, and the second input terminal of the first logic unit C1 receives the second control by second resistance R2
Signal processed is high level, and to which the output end of the first logic unit C1 exports high level, and the first of first switching element T1 controls
End processed receives high level by the output end of the first connected logic unit C1, then first switching element T1 is connected, to first
The first switching element T1 ground connection that the first path terminal of switch element T1 passes through conducting is low level, to second switch element T2
Third control terminal low level is received by the first path terminal of connected first switching element T1, then second switch element T2 is led
It is logical, it is connected with fourth passage end to the third path end of second switch element T2.
Meanwhile second the first input end of logic unit C2 to receive first control signal by first resistor R1 be high electricity
Flat, it is high level that the second input terminal of the second logic unit C2 receives second control signal by second resistance R2, to second
The output end of logic unit C2 exports low level, and the third control terminal of third switch element T3 passes through the second connected logic list
The output end of first C2 receives low level, then third switch element T3 is disconnected, logical to the fifth passage end of third switch element T3
It crosses the 4th resistance R4 and receives second source VDD2On high level, to the 4th switch element T4 the 4th control terminal pass through be connected
The fifth passage end of third switch element T3 receive high level, then the 4th switch element T4 is disconnected, i.e. the 4th switch element T4
The 7th path terminal be not turned on the 8th path terminal.
Meanwhile it is high electricity that the first input end of third logic unit C3 receives first control signal by first resistor R1
Flat, it is high level that the second input terminal of third logic unit C3 receives second control signal by second resistance R2, to third
The output end of logic unit C3 exports high level.The first input end of 4th logic unit C4 passes through connected first switching element
The first path terminal of T1 receives low level, and the second input terminal of the 4th logic unit C4 passes through connected third logic unit C3's
Output end receives high level, and low level is exported to the output end of the 4th logic unit C4.The 5th control of 5th switch element T5
End processed receives the low level on the output end of the 4th logic unit C4 by the 5th resistance R5, to which the 5th switch element T5 is disconnected
It opens, the 9th path terminal of the 5th switch element T5 receives third power supply V by the 6th resistance R6DD3High level, the 6th switch member
The 6th control terminal of part T6 receives high level by the 9th path terminal of the 5th connected switch element T5, to the 6th switch member
Part T6 is disconnected, i.e. the 11st path terminal of the 6th switch element T6 is not turned on the 12nd path terminal.4th logic unit C4's
First input end receives low level by the first path terminal of connected first switching element T1, and the second of the 4th logic unit C4
Input terminal receives high level by the output end of connected third logic unit C3, defeated to the output end of the 4th logic unit C4
Go out low level.The 5th control terminal of 5th switch element T5 is received by the 5th resistance R5 on the output end of the 4th logic unit C4
Low level, to which the 5th switch element T5 is disconnected, the 9th path terminal of the 5th switch element T5 passes through the 6th resistance R6 and receives
Third power supply VDD3High level, the 6th control terminal of the 6th switch element T6 passes through the 9th of the 5th connected switch element T5
Path terminal receives high level, to the 6th switch element T6 disconnections, i.e. the 11st path terminal and the tenth of the 6th switch element T6
Two path terminals are not turned on.
Meanwhile the 5th the first input end of logic unit C5 pass through the fifth passage termination of connected third switch element T3
High level is received, the tenth input terminal of the 5th logic unit C5 receives high electricity by the output end of connected third logic unit C3
It is flat, export low level to the output end of the 5th logic unit C5.The 7th control terminal of 7th switch element T7 passes through the 7th electricity
The low level on the output end of the 5th logic unit C5 of R7 receptions is hindered, to which the 7th switch element T7 is disconnected, the 7th switch element
The tenth threeway terminal of T7 receives the 4th power supply V by the 8th resistance R8DD4High level, the 8th switch element T8 the 8th control
End processed receives high level by the tenth three-way end of the 7th connected switch element T7, to which the 8th switch element T8 is disconnected,
That is the 15th path terminal of the 8th switch element T8 is not turned on the 16th path terminal.
Therefore, the first control signal which receives at first choice end 415 is high level and the second choosing
Second control signals that end 416 receives are selected when being high level, the second switch being connected with the output end 417 of sub- selection circuit 410
In element T2, the 4th switch element T4, the 6th switch element T6 and the 8th switch element T8, only second switch element T2 is led
Logical, then the fourth passage end of second switch element T2 receives the son on third path end by the second switch element T2 of conducting and selects
Select the voltage on the first input end 411 of circuit 410, and the fourth passage end of second switch element T2 and sub- selection circuit 410
Output end 417 be connected, then the output end 417 of sub- selection circuit 410 exports on the first input end 411 of sub- selection circuit 410
Voltage.And m-th of voltage of the first input end 411 of m-th of sub- selection circuit 410 and first group of voltage generation circuit 100
Output end is connected, then the 1st voltage output end 401 of selection circuit 400, which corresponds to, exports what first group of voltage generation circuit 100 provided
Gamma electric voltage V1A in first group of gamma electric voltage, the 2nd voltage output end 402 correspond to first group of voltage generation circuit 100 of output and carry
Gamma electric voltage V2A in the first group of gamma electric voltage supplied, sequence, the n-th voltage output end 40n correspond to first group of voltage of output successively
The gamma electric voltage VnA for first group of gamma electric voltage that generation circuit 100 provides, then selection circuit 400 is that positive sequence output first generates
First group of gamma electric voltage that circuit provides is to source electrode drive circuit 500.
With reference to foregoing description, can derive the first control signal that sub- selection circuit 410 receives at first choice end 415 with
And second selection end 416 receive second control signal corresponding low and high level when, the first logic unit C1 to the 5th logic
The working condition that unit C5 and first switching element T1 to the 8th is switched, details are not described herein for specific work process.First
The working condition of logic unit C1 to the 5th logic unit C5 are as shown in the table, wherein L indicates that low level, H indicate high level.
In upper table, when the output end of the first logic unit C1 exports high level, first switching element T1 conductings so that second
Switch element T2 is connected because its second control terminal receives low level；When the output end output high level of the second logic unit C2,
Third switch element T3 conductings so that the 4th switch element T4 is connected because its 4th control terminal receives low level；4th logic
When the output end output high level of unit C4, the 5th switch element T5 conductings so that the 6th switch element T6 is because of its 6th control
End receives low level and is connected；When the output end output high level of the 5th logic unit C5, the 7th switch element T7 conductings so that
8th switch element T8 is connected because its 8th control terminal receives low level.And in upper table, the first logic unit C1, second are patrolled
When collecting the output end output high level of unit C2, the 4th logic unit C4 and the 5th logic unit C5, the first control is just corresponded to
Four kinds of situations of signal and the low and high level of second control signal.Therefore, according to first control signal and second control signal
Low and high level, sub- selection circuit 410 is so that second switch element T2, the 4th switch element T4, the 6th switch element T6, the 8th
Switch element T8 correspondingly only there are one conducting, then the output first input ends 411 of the output end of sub- selection circuit 410 417 to
The voltage on one input terminal of correspondence in 4th input terminal 414, i.e., first group of connected voltage generation circuit 100 or second group
Voltage on the relevant voltage output end of voltage generation circuit 200.And selection circuit 400 includes multiple sub- selection circuits 410, then
All sub- selection circuits 410 of selection circuit 400 select end 416 to receive the first control respectively by first choice end 415, second
After signal processed, second control signal, the output end 417 of all sub- selection circuits 410 all only exports first input end 411 to the 4th
The voltage on one input terminal of correspondence in input terminal 414.Therefore, when first control signal is high level and second control signal
For high level when, then gamma voltage generating apparatus positive sequence output first voltage generation circuit provide first group of gamma electric voltage；When
When first control signal is low level and second control signal is low level, then gamma voltage generating apparatus backward output first is electric
First group of gamma electric voltage for pressing generation circuit to provide；When first control signal is low level and second control signal is high level
When, then gamma voltage generating apparatus positive sequence exports second group of gamma electric voltage that second voltage generation circuit provides；When the first control
When signal is high level and second control signal is low level, then gamma voltage generating apparatus backward output second voltage generates electricity
Second group of gamma electric voltage that road provides.
The gamma voltage generating apparatus of the present embodiment, the corresponding control signal positive sequence or backward that can be generated according to display pattern
Corresponding one group of gamma electric voltage in multigroup gamma electric voltage is exported, and is exported to source electrode drive circuit 500, is provided for configuration
It is convenient, save layout occupied space.
Second embodiment
Fig. 3 is the circuit connection diagram for the gamma voltage generating apparatus that second embodiment provides.The present embodiment and first is implemented
Example is essentially identical, the difference is that, first group of voltage generation circuit 100 includes first resistor string, and first resistor string includes n+1
The first end of a first divider resistance 110, first resistor string receives the first DC voltage 120, the second termination of first resistor string
Ground, the common end of the first divider resistance of each two 110 are connected with n voltage output end of first group of voltage generation circuit 100.
In one embodiment, second group of voltage generation circuit 200 includes second resistance string, and second resistance string includes n+1
The first end of second divider resistance 210, second resistance string receives the second DC voltage 220, and the second end of second resistance string is grounded,
The common end of the second divider resistance of each two 210 is connected with n voltage output end of second group of voltage generation circuit 200.
The gamma voltage generating apparatus of the present embodiment generates one group of gamma electric voltage by way of resistance string electric resistance partial pressure,
Gamma voltage generating apparatus can be exported according to the corresponding control signal positive sequence or backward that display pattern generates in multigroup gamma electric voltage
Corresponding one group of gamma electric voltage, and export to source electrode drive circuit 500, it is provided a convenient for configuration, saves layout and account for
Use space.
3rd embodiment
Fig. 4 is the circuit connection diagram for the gamma voltage generating apparatus that 3rd embodiment provides.The present embodiment and second is implemented
Example is essentially identical, the difference is that, second group of voltage generation circuit 200 includes programmable gamma electric voltage buffer circuit, can be compiled
Journey gamma electric voltage buffer circuit (P-Gamma IC) includes the n electricity that n voltage output end is second group of voltage generation circuit 200
Press output end.
In one embodiment, control signal includes third control signal, and programmable gamma electric voltage buffer circuit is for buffering
At least one set of gamma electric voltage, and corresponding one group of gamma electric voltage in at least one set of gamma electric voltage of signal output is controlled according to third.
The gamma voltage generating apparatus of the present embodiment generates corresponding one group of gal by programmable gamma electric voltage buffer circuit
Horse voltage, the corresponding control signal positive sequence or backward that gamma voltage generating apparatus is generated according to display pattern export multigroup gamma electricity
Corresponding one group of gamma electric voltage in pressure, and export to source electrode drive circuit 500, it is provided a convenient for configuration, saves cloth
Office's occupied space.
Fourth embodiment
The present embodiment also provides a kind of liquid crystal display device, and liquid crystal display device includes that above-mentioned gamma electric voltage generates dress
It sets.
In one embodiment, liquid crystal display device be wide viewing angle display pattern when, first control signal be high level and
Second control signal is high level, then gamma voltage generating apparatus positive sequence exports first group of gamma electric voltage or the first control letter
Number it is low level and second control signal is low level, then gamma voltage generating apparatus backward exports first group of gamma electric voltage.?
When liquid crystal display device is narrow viewing angle display pattern, first control signal is low level and second control signal is high level, then
Gamma voltage generating apparatus positive sequence exports second group of gamma electric voltage or first control signal is high level and second control signal
For low level, then gamma voltage generating apparatus backward exports second group of gamma electric voltage.
The gamma voltage generating apparatus and liquid crystal display device of the present embodiment, the corresponding control that can be generated according to display pattern
Signal, gamma voltage generating apparatus positive sequence or backward export corresponding one group of gamma electric voltage in multigroup gamma electric voltage, and export extremely
Source electrode drive circuit 500, provides a convenient for configuration, saves layout occupied space.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, however is not limited to invent, any person skilled in the art,
It is not departing within the scope of inventive technique scheme, when the technology contents using the disclosure above make a little change or are modified to equivalent
The equivalent embodiment of variation, as long as being without departing from inventive technique scheme content, the technical spirit according to invention is to above example
Made by any simple modification, equivalent change and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of gamma voltage generating apparatus, which is characterized in that including：
First group of voltage generation circuit (100), first group of voltage generation circuit (100) is for providing first group of gamma electricity
Pressure, first group of voltage generation circuit (100) includes n voltage output end, wherein n is positive integer；
Second group of voltage generation circuit (200), second group of voltage generation circuit (200) is for providing second group of gamma electricity
Pressure, second group of voltage generation circuit (200) includes n voltage output end；
Control circuit (300), the control circuit (300), which obtains, will show the display pattern of picture and according to the display mould
Formula generates corresponding control signal, and the control signal includes first control signal and second control signal；
Selection circuit (400), the selection circuit (400) includes n voltage output end, and the selection circuit (400) is for connecing
Receive first group of gamma electric voltage and second group of gamma electric voltage, and the n according to the control signal in the selection circuit (400)
A voltage output end positive sequence or backward export first group of gamma electric voltage or second group of gamma electric voltage to source drive electricity
Road (500).
2. gamma voltage generating apparatus as described in claim 1, which is characterized in that the selection circuit (400) includes n son
Selection circuit (410), the sub- selection circuit (410) include first input end (411), the second input terminal (412), third input
Hold (413), the 4th input terminal (414), first choice end (415), the second selection end (416) and output end (417), m-th of institute
First input end (411) and m-th of the voltage of first group of voltage generation circuit (100) for stating sub- selection circuit (410) are defeated
Outlet is connected, the second input terminal (412) and the first group of voltage generation circuit of m-th of sub- selection circuit (410)
(100) the n-th-m+1 voltage output ends are connected, the third input terminal (413) of m-th of sub- selection circuit (410) and the
M-th of voltage output end of two groups of voltage generation circuits (200) is connected, the 4th input of m-th of sub- selection circuit (410)
End (414) is connected with the n-th-m+1 of second group of voltage generation circuit (200) voltage output ends, m-th of sub- selection circuit
(410) first choice end (415) receives the first control signal, the second selection of m-th of sub- selection circuit (410)
(416) are held to receive the second control signal, the output end (417) of m-th of sub- selection circuit (410) is according to described first
Controlling signal and the second control signal selects the first input end (411) of m-th of sub- selection circuit (410) to the 4th
The voltage on an input terminal in input terminal (414) is exported；
Wherein, m is less than or equal to n, and m is positive integer.
3. gamma voltage generating apparatus as claimed in claim 2, which is characterized in that m-th of sub- selection circuit (410) packet
It includes
First logic unit (C1), first logic unit (C1) include first input end, the second input terminal and output end, institute
State the first input end of the first logic unit (C1) the by first resistor (R1) and described m-th sub- selection circuit (410)
One selection end (415) is connected, and the second input terminal of first logic unit (C1) passes through second resistance (R2) and described m-th
Second selection end (416) of sub- selection circuit (410) is connected；
First switching element (T1), the first switching element (T1) include the first control terminal, the first path terminal and alternate path
End, the first control terminal of the first switching element (T1) is connected with the output end of first logic unit (C1), and described the
First path terminal of one switch element (T1) passes through 3rd resistor (R3) and the first power supply (VDD1) be connected, the first switch member
The alternate path end of part (T1) is grounded；
Second switch element (T2), the second switch element (T2) include the second control terminal, third path end and fourth passage
End, the second control terminal of the second switch element (T2) are connected with the first path terminal of the first switching element (T1), institute
State first input end (411) phase at the third path end and described m-th sub- selection circuit (410) of second switch element (T2)
Even, the fourth passage end of the first switching element (T1) is connected with the output end of described m-th sub- selection circuit (410)；
Second logic unit (C2), second logic unit (C2) include first input end, the second input terminal and output end, institute
The first input end for stating the second logic unit (C2) is connected with the first input end of first logic unit (C1), and described second
Second input terminal of logic unit (C2) is connected with the second input terminal of first logic unit (C1)；
Third switch element (T3), the third switch element (T3) include third control terminal, fifth passage end and the 6th access
End, the third control terminal of the third switch element (T3) is connected with the output end of first logic unit (C1), and described the
The fifth passage end of three switch elements (T3) passes through the 4th resistance (R4) and second source (VDD2) be connected, the third switch member
6th path terminal of part (T3) is grounded；
4th switch element (T4), the 4th switch element (T4) include the 4th control terminal, the 7th path terminal and the 8th access
End, the 4th control terminal of the 4th switch element (T4) are connected with the fifth passage end of the third switch element (T3), institute
State third input terminal (413) phase of the 7th path terminal and described m-th sub- selection circuit (410) of the 4th switch element (T4)
Even, the 8th path terminal of the 4th switch element (T4) is connected with the fourth passage end of the second switch element (T2)；
Third logic unit (C3), the third logic unit (C3) include first input end, the second input terminal and output end, institute
The first input end for stating third logic unit (C3) is connected with the first input end of first logic unit (C1), the third
Second input terminal of logic unit (C3) is connected with the second input terminal of first logic unit (C1)；
4th logic unit (C4), the 4th logic unit (C4) include first input end, the second input terminal and output end, institute
The first input end for stating the 4th logic unit (C4) is connected with the first path terminal of the first switching element (T1), and the described 4th
Second input terminal of logic unit (C4) is connected with the output end of the third logic unit (C3)；
5th logic unit (C5), the 5th logic unit (C5) include first input end, the second input terminal and output end, institute
The first input end for stating the 5th logic unit (C5) is connected with the 4th control terminal of the 4th switch element (T4), and the described 5th
Second input terminal of logic unit (C5) is connected with the output end of the third logic unit (C3)；
5th switch element (T5), the 5th switch element (T5) include the 5th control terminal, the 9th path terminal and the tenth access
End, the 5th control terminal of the 5th switch element (T5) are defeated by the 5th resistance (R5) and the 4th logic unit (C4)
Outlet is connected, and the 9th path terminal of the 5th switch element (T5) passes through the 6th resistance (R6) and third power supply (VDD3) be connected,
Tenth path terminal of the 5th switch element (T5) is grounded；
6th switch element (T6), the 6th switch element (T6) include the 6th control terminal, the 11st path terminal and the 12nd
Path terminal, the 9th path terminal phase of the 6th control terminal and the 5th switch element (T5) of the 6th switch element (T6)
Even, the second input terminal of the 11st path terminal and described m-th sub- selection circuit (410) of the 6th switch element (T6)
(412) it is connected, the fourth passage of the 12nd path terminal and the second switch element (T2) of the 6th switch element (T6)
End is connected；
7th switch element (T7), the 7th switch element (T7) include the 7th control terminal, the tenth threeway terminal and the 14th
7th control terminal of path terminal, the 7th switch element (T7) passes through the 7th resistance (R7) and the 5th logic unit (C5)
Output end be connected, the tenth threeway terminal of the 7th switch element (T7) passes through the 8th resistance (R8) and the 4th power supply
(VDD4) be connected, the 14th path terminal ground connection of the 7th switch element (T7)；
8th switch element (T8), the 8th switch element (T8) include the 8th control terminal, the 15th path terminal and the 16th
Path terminal, the tenth threeway terminal phase of the 8th control terminal and the 7th switch element (T7) of the 8th switch element (T8)
Even, the 4th input terminal of the 15th path terminal and described m-th sub- selection circuit (410) of the 8th switch element (T8)
(414) it is connected, the fourth passage of the 16th path terminal and the second switch element (T2) of the 8th switch element (T8)
End is connected.
4. gamma voltage generating apparatus as claimed in claim 3, which is characterized in that the first switching element (T1), described
Third switch element (T3), the 5th switch element (T5) and the 7th switch element (T7) are NPN type triode, described
Second switch element (T2), the 4th switch element (T4), the 6th switch element (T6) and the 8th switch element
(T8) it is P-channel technotron.
5. gamma voltage generating apparatus as claimed in claim 3, which is characterized in that the first of first logic unit (C1)
When input terminal and the second input terminal receive high level signal simultaneously, the output end of first logic unit (C1) exports high level
Signal, it is described when receiving high level signal when the first input end and the second input terminal difference of first logic unit (C1)
The output end of first logic unit (C1) exports low level signal；
The first input end of second logic unit (C2) receives low level signal and the second input terminal receives high level simultaneously
When signal, the output end output high level signal of second logic unit (C2), the first of second logic unit (C2)
Input terminal does not receive low level signal or when the second input terminal does not receive high level signal, second logic unit (C2) it is defeated
Outlet exports low level signal；
The first input end and the second input terminal of the third logic unit (C3) receive high level signal or receive simultaneously simultaneously
When low level signal, the output end of the third logic unit (C3) exports high level signal, the third logic unit (C3)
First input end and when receiving high level signal when the second input terminal difference or receiving low level signal simultaneously, the third is patrolled
The output end for collecting unit (C3) exports low level signal；
The first input end and the second input terminal of 4th logic unit (C4) receive high level signal or receive simultaneously simultaneously
When low level signal, the output end of the 4th logic unit (C4) exports high level signal, the 4th logic unit (C4)
First input end and when receiving high level signal when the second input terminal difference or receiving low level signal simultaneously, the described 4th patrols
The output end for collecting unit (C4) exports low level signal；
The first input end and the second input terminal of 5th logic unit (C5) receive high level signal or receive simultaneously simultaneously
When low level signal, the output end of the 5th logic unit (C5) exports low level signal, the 5th logic unit (C5)
First input end and when receiving high level signal when the second input terminal difference or receiving low level signal simultaneously, the described 5th patrols
The output end for collecting unit (C5) exports high level signal.
6. gamma voltage generating apparatus as claimed in claim 2, which is characterized in that first group of voltage generation circuit
(100) include first resistor string, the first resistor string includes n+1 the first divider resistances (110), the first resistor string
First end receives the first DC voltage (120), the second end ground connection of the first resistor string, the first divider resistance of each two
(110) common end is connected with n voltage output end of first group of voltage generation circuit (100).
7. gamma voltage generating apparatus as claimed in claim 6, which is characterized in that second group of voltage generation circuit
(200) include second resistance string, the second resistance string includes n+1 the second divider resistances (210), the second resistance string
First end receives the second DC voltage (220), the second end ground connection of the second resistance string, the second divider resistance of each two
(210) common end is connected with n voltage output end of second group of voltage generation circuit (200).
8. gamma voltage generating apparatus as claimed in claim 6, which is characterized in that the control signal includes third control letter
Number, second group of voltage generation circuit (200) includes programmable gamma electric voltage buffer circuit, and the programmable gamma electric voltage is slow
It includes the n voltage output end that n voltage output end is second group of voltage generation circuit (200) to rush circuit, described
Programmable gamma electric voltage buffer circuit is controlled for buffering at least one set of gamma electric voltage, and according to the third described in signal output
Corresponding one group of gamma electric voltage at least one set of gamma electric voltage.
9. a kind of liquid crystal display device, including gate driving circuit, which is characterized in that the liquid crystal display device includes that right such as is wanted
Seek the gamma voltage generating apparatus described in any one of 1 to 8.
10. liquid crystal display device as claimed in claim 9, which is characterized in that aobvious for wide viewing angle in the liquid crystal display device
When showing pattern, the first control signal is high level and the second control signal is high level, then the gamma electric voltage production
Generating apparatus positive sequence exports first group of gamma electric voltage or the first control signal is low level and the second control signal is
Low level, then the gamma voltage generating apparatus backward export first group of gamma electric voltage；
When the liquid crystal display device is narrow viewing angle display pattern, the first control signal is low level and second control
Signal processed is high level, then the gamma voltage generating apparatus positive sequence exports second group of gamma electric voltage or first control
Signal is high level and the second control signal is low level, then the gamma voltage generating apparatus backward exports second group of gal
Horse voltage.
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| CN201810514835.7A CN108735173B (en) | 2018-05-25 | 2018-05-25 | Gamma voltage generating device and liquid crystal display device |
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| CN201810514835.7A CN108735173B (en) | 2018-05-25 | 2018-05-25 | Gamma voltage generating device and liquid crystal display device |
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| CN108735173B CN108735173B (en) | 2020-12-29 |
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| CN109559690A (en) * | 2018-12-04 | 2019-04-02 | 昆山龙腾光电有限公司 | Gamma voltage generation circuit, method and liquid crystal display device |
| CN110322852B (en) * | 2019-06-14 | 2020-10-16 | 深圳市华星光电技术有限公司 | Gamma voltage output circuit, step-down repairing method thereof and source driver |
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|---|---|
| CN108735173B (en) | 2020-12-29 |
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