CN107945753A - Source drive module and liquid crystal display - Google Patents
Source drive module and liquid crystal display Download PDFInfo
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- CN107945753A CN107945753A CN201711157735.5A CN201711157735A CN107945753A CN 107945753 A CN107945753 A CN 107945753A CN 201711157735 A CN201711157735 A CN 201711157735A CN 107945753 A CN107945753 A CN 107945753A
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- Prior art keywords
- gamma
- output circuit
- driving chip
- liquid crystal
- drive module
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
-
- 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
- G09G2320/0257—Reduction of after-image effects
Abstract
The invention discloses a kind of source drive module and liquid crystal display, the source drive module includes gamma driving chip and the source driving chip being connected with liquid crystal display, gamma driving chip includes multiple the gamma output circuits and common electrode output circuit that multiple load circuits are connected with the source driving chip, the gamma output circuit and common electrode output circuit are respectively controlling the source driving chip to export to the voltage data signal of liquid crystal display and common-battery pole tension, and in shutdown, the gamma output circuit may be connected to a load circuit with common electrode output circuit, to adjust the power down speed of voltage data signal electrode voltage together.The source drive module and liquid crystal display of the present invention, the power down speed of voltage data signal electrode voltage together can be controlled in shutdown, the image retention problem for flicker of shutting down caused by the pressure difference is eliminated to reduce pressure difference of the voltage data signal together between electrode voltage.
Description
Technical field
The present invention relates to liquid crystal display-driving field, more particularly to a kind of source drive module and one kind to have the source
Pole drives the liquid crystal display of module.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) is the display device of planar ultra-thin, due to liquid crystal
Show that the power consumption of device is relatively low, and there is high image quality, small, light-weight, therefore it is favored by everybody, and become
The mainstream of display.At present, liquid crystal display be based on thin film transistor (TFT) (Thin Film Transistor, TFT) LCD,
Liquid crystal display panel is the primary clustering of liquid crystal display, and liquid crystal display panel generally comprises the color membrane substrates being oppositely arranged, TFT
Array base palte and the liquid crystal layer being clipped between the color membrane substrates and tft array substrate.
The driving of liquid crystal display panel is typically respectively to liquid crystal display list from raster data model module and source drive module
Member provides scanning signal and data-signal (Data) come what is realized, different voltage data signals and common electrode (VCOM) voltage it
Between pressure difference cause liquid crystal rotation angle different so as to form the difference of brightness, i.e. the display picture of liquid crystal display panel is formed
Different grayscale.
However, the VCOM voltages of existing TFT LCD and the speed of Data voltage power down are different, i.e. VCOM and Data exist
Can be there are pressure difference in shutdown process, when pressure difference therebetween is more than 2V, human eye will feel the image retention of similar flicker, and
And during the different source drive modules of collocation, image retention degree is different, and then influences the viewing effect of liquid crystal display.
The content of the invention
The embodiment of the present invention provides a kind of source drive module and the liquid crystal display with the source drive module, its
The power down speed of voltage data signal electrode voltage together can be controlled in shutdown, and the voltage data signal can be reduced
Pressure difference between electrode voltage together, so as to eliminate the image retention problem of shutdown flicker caused by the pressure difference, and then lifts liquid crystal
The viewing effect and user experience of display.
In a first aspect, an embodiment of the present invention provides a kind of source drive module, including gamma driving chip and and liquid
The source driving chip that brilliant display unit is connected, the gamma driving chip include being electrically connected with the source driving chip
Multiple gamma output circuits and a common electrode output circuit, the gamma output circuit drives to control by the source electrode
Dynamic chip is exported to the voltage data signal of the liquid crystal display, and the common electrode output circuit is controlling by the source
Pole driving chip is exported to the common-battery pole tension of the liquid crystal display, and the gamma driving chip further includes multiple load electricity
Road, the common electrode output circuit are electrically connected with the load circuit, and pass through connected load circuit tune in shutdown
Saving the power down speed of the common-battery pole tension, each gamma output circuit load circuit corresponding with one is electrically connected, and
The power down speed of the voltage data signal is adjusted by the load circuit connected in shutdown.
Wherein, the load circuit includes multiple resistance and multiple switch, and one end of each resistance is grounded, is another
End passes through the output terminal for switching the output terminal or the common electrode output circuit that are connected to the gamma output circuit.
Wherein, the resistance value of the load circuit is adjustable, when matching different source driving chips, the gamma output
Circuit accesses the resistance for the resistance value that matches with the common electrode output circuit by the switch from the load circuit.
Wherein, the load circuit includes three resistance and three switches, and one end of each resistance is grounded, is another
End is connected to the output terminal of the output terminal or the common electrode output circuit of the gamma output circuit by the switch, its
In, the resistance value of three resistance is identical or part is identical.
Wherein, each switch can be controlled closure or be disconnected by I2C signals.
Wherein, the gamma driving chip further includes controller, the controller and the common electrode output circuit and
The gamma output circuit is electrically connected, to control input to the common electrode output circuit and gamma output electricity
The signal on road.
Wherein, it is digital signal to input to the signal of the gamma output circuit, and the gamma output circuit includes digital-to-analogue
Converting unit and amplifier, one end of the D/A conversion unit is connected to the controller, the other end is connected to described put
The input terminal of big device, the output terminal of the amplifier are connected to the source driving chip, and may be selected to be connected to corresponding negative
Carry circuit.
Wherein, it is digital signal to input to the signal of the common electrode output circuit, and the common electrode output circuit includes
D/A conversion unit and voltage follower, one end of the D/A conversion unit are connected to the control chip, other end connection
To the voltage follower, the output terminal of the voltage follower is connected to the source driving chip, and may be selected to be connected to
Corresponding load circuit.
Wherein, the gamma driving chip is a programmable gamma driving chip.
On the other hand, the present invention also provides a kind of liquid crystal display with above-mentioned source drive module.
In conclusion the source drive module of the invention that is provided in the embodiment of the present invention and there is the source drive mould
The liquid crystal display of group, it can control voltage data signal electrode voltage together in shutdown by the load circuit of access
Power down speed, and during corresponding different source driving chips, can select to access the load of matched resistance value into
Row is adjusted, to reduce pressure difference of the voltage data signal together between electrode voltage as far as possible so that liquid crystal display is closing
The pressure difference of the voltage data signal after machine together between electrode voltage levels off to 0, is closed so as to eliminate caused by the pressure difference
The image retention problem of machine flicker, and then lift the viewing effect and user experience of liquid crystal display.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the module frame chart of source drive module provided in an embodiment of the present invention.
Fig. 2 is the circuit diagram of gamma driving chip in source drive module shown in Fig. 1.
Embodiment
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear
Chu, be fully described by.Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment party
Formula.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained on the premise of creative work is not made
The every other embodiment obtained, should all belong to the scope of protection of the invention.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or detachably connected, or integratedly be connected
Connect；Can mechanically connect；It can be directly connected, can also be indirectly connected by intermediary, can be in two elements
The connection in portion.For the ordinary skill in the art, the tool of above-mentioned term in the present invention can be understood with concrete condition
Body implication.
In addition, in the description of the present invention, unless otherwise indicated, " multiple " are meant that two or more.If this
Occurring the term of " process " in specification, it refers not only to independent process, when can not clearly be distinguished with other process, as long as
It can realize that the effect desired by the process is then also included within this term.In addition, the numerical value represented in this specification with " ￣ "
Scope refers to the scope that " ￣ " front and rear numerical value recorded is included as minimum value and maximum.In the accompanying drawings, tie
The similar or identical unit of structure is indicated by the same numeral.
An embodiment of the present invention provides a kind of source drive module and with the source drive module liquid crystal display,
It can control the power down speed of voltage data signal electrode voltage together in shutdown, to reduce the data as far as possible
The signal voltage pressure difference between electrode voltage together, so that the image retention problem of shutdown flicker caused by the pressure difference is eliminated, and then
Lift the viewing effect and user experience of liquid crystal display.Following embodiments combination attached drawing is described in detail respectively.
Please refer to Fig.1 and Fig. 2, Fig. 1 are the module frame chart of source drive module provided in an embodiment of the present invention, Fig. 2 Fig. 1
The circuit diagram of gamma driving chip in shown source drive module.The embodiment of the present invention provides a kind of source drive module, it can
To control the power down speed of voltage data signal electrode voltage together in shutdown, to reduce the data-signal electricity as much as possible
The pressure difference between electrode voltage together is pressed, so as to eliminate the image retention problem of shutdown flicker caused by the pressure difference, and then lifts liquid
The viewing effect and user experience of crystal display.
In the present embodiment, which includes gamma driving chip 10 and source driving chip 30, described
Source driving chip 30 is electrically connected with the gamma driving chip 10 and liquid crystal display 90, the source driving chip
30 under the control of the gamma driving chip 10 exporting default voltage data signal and common-battery pole tension to described
Liquid crystal display 90, so that liquid crystal deflection is driven by the pressure difference between the voltage data signal together electrode voltage,
And then realize display function.As shown in Fig. 2, the gamma driving chip 10 includes multiple gamma output circuits 11 and one common
Electrode output circuit 13, each gamma output circuit 11 is electrically connected with the source driving chip 30, to control
Exported by the source driving chip 30 to the voltage data signal of the liquid crystal display 90.The common electrode output circuit
13 are electrically connected with the source driving chip 30, are exported to control by the source driving chip 30 to the liquid crystal display
The common-battery pole tension of unit 90.
In the present embodiment, the gamma driving chip 10 further includes multiple load circuits 15, each gamma output
Circuit 11 is connected to a corresponding load circuit 15, and it is described to adjust to pass through connected load circuit 15 in shutdown
The power down speed of voltage data signal；The common electrode output circuit 13 is connected to a corresponding load circuit 15, and can also
Pass through connected load circuit 15 in shutdown to adjust the power down speed of the common-battery pole tension.
The source drive module of the present invention, the multiple gamma output circuits 11 and common electrode of the gamma driving chip 10
Output circuit 13 can connect a load circuit 15 respectively, and can pass through what is connected (when liquid crystal display powers off) in shutdown
Load circuit 15 is adjusted to be exported to the voltage data signal and common electrode of the liquid crystal display 90 by the source drive module
The power down speed of voltage, is consistent the power down speed of voltage data signal electrode voltage together, you can reduces data
The signal voltage pressure difference between electrode voltage, and then the image retention for eliminating flicker of being shut down caused by the pressure difference is asked together
Topic.
Wherein, by load circuit 15 adjust the voltage data signal together the power down speed of electrode voltage principle such as
Under：When liquid crystal display shuts down, the gamma output circuit 11 is exported to the source drive with common electrode output circuit 13
The signal of chip 30 will be gradually reduced, but may be by the gamma output circuit 11 and the circuit structure of common electrode output circuit 13
Different influences, the gamma output circuit 11 are exported to the signal of the source driving chip 30 with common electrode output circuit 13
The rate of decay it is different, it is corresponding to control the source driving chip 30 to export to the data-signal electricity of the liquid crystal display 90
Press the power down speed of electrode voltage together also different.And in embodiment of the present invention, in the gamma output circuit 11 and altogether
A load circuit 15 is connected on electrode output circuit 13 respectively, and the gamma output electricity is adjusted by the load circuit 15
Road 11 exports the rate of decay of the signal to the source driving chip 30 with common electrode output circuit 13, and then balances the source
The power down speed for the voltage data signal electrode voltage together that pole driving chip 30 exports, makes voltage data signal and common electrode electricity
The power down speed of pressure is consistent substantially, you can eliminates voltage data signal flicker caused by the pressure difference of electrode voltage together
Image retention problem.
In an embodiment of the present invention, the negative of the gamma output circuit 11 or common electrode output circuit 13 is connected to
The resistance value for carrying circuit 15 is adjustable so that described when the gamma driving chip 10 connects different source driving chips 30
Gamma output circuit 11 can access the load for the resistance value that matches with common electrode output circuit 13 from the load circuit 15.
In this way, in shutdown, you can pass through accessed load to adjust by the gamma output circuit 11 and common electrode output
Circuit 13 exports the rate of decay of the signal to the source driving chip 30, and then balances the source driving chip 30 and export
Voltage data signal electrode voltage together power down speed, you can eliminate the pressure of voltage data signal electrode voltage together
The image retention problem of flicker caused by poor.
In an embodiment of the present invention, each load circuit 15 includes multiple resistance R and multiple switch S, often
The one resistance R one end ground connection, the other end by one switch S be connected to the gamma output circuit 11 output terminal or
The output terminal of the common electrode output circuit 13.Wherein, the resistance value of multiple resistance R can be identical, can also portion
Split-phase is same, can also be different, and an even at least resistance R may be set to be the adjustable slip electricity of a resistance value
Resistance, i.e., at least one resistance R may be configured as sliding adjustable resistance, it is of the invention in not the resistance value size to the resistance R and
Resistance type is specifically limited.When arrange in pairs or groups different source driving chips 30 when, the gamma output circuit 11 and described common
Electrode output circuit 13 can selection connects matched one or more resistance R from corresponding load circuit 15 respectively,
So that by the source driving chip 30 export to liquid crystal display voltage data signal together electrode voltage power down speed
Degree is consistent.In this way, in shutdown, the voltage data signal and the common-battery pole tension are being accessed from the load circuit 15
Its power down speed will be kept synchronous under the influence of resistance R, and close to 0, liquid crystal can not deflect pressure difference between the two, you can be eliminated
The image retention problem of shutdown flicker caused by the pressure difference.
In embodiments of the present invention, when liquid crystal display shuts down, the gamma output circuit 11 and the common electrode
Output circuit 13 is connected to the resistance R of one or more of described load circuit 15 ground connection, you can passes through the electricity of the ground connection
Resistance R quickly drags down the gamma output circuit 11 and exports to the signal of the source driving chip 30, and one by being accessed
The resistance value of a or multiple resistance R is exported to the rate of decay of the signal of the source driving chip 30 to control, and then controls institute
State the power down speed of the voltage data signal of the output of source driving chip 30.Similar, the common electrode output circuit 13 also leads to
One or more ground resistance R for being accessed are crossed to adjust the power down speed of the common-battery pole tension.
In embodiments of the present invention, each load circuit 15 includes three resistance R and three switch S, often
The one resistance R one end ground connection, the other end by one switch S be connected to the gamma output circuit 11 output terminal or
The output terminal of the common electrode output circuit 13.But in the present invention, not to the resistance R in each load 15 and open
The quantity for closing S is specifically limited, and can as needed be adapted to adjust the resistance R and be switched the quantity of S.
In an embodiment of the present invention, each switch S can be electronic switch, it can pass through I2C (Inter-
Integrated Circuit) signal control its close or disconnect.
In embodiments of the present invention, the gamma driving chip 10 includes 14 gamma output circuits 11 and one common
Electrode output circuit 13, the quantity of the load circuit 15 correspond to 14 gamma output circuits 11 and a common electrode output electricity
Road 13 is arranged to 15 so that each gamma output circuit 11 is connected respectively a load electricity with common electrode output circuit 13
Road 15, and can shutdown when selection be connected to the corresponding load circuit 15 eliminate the voltage data signal with it is described common
Pressure difference between electrode voltage, and then eliminate the image retention problem for the shutdown flicker that the pressure difference produces.
In another embodiment of the present invention, can also multiple gamma output circuits 11 share one of them or it is more
A load circuit 15, while the quantity of the load circuit 15 is reduced, leads to too small amount of load circuit 15 and adjusts the number
According to the power down speed of signal voltage and the common-battery pole tension, the not quantity to the load circuit 15 and the gal herein
Horse output circuit 11 and the connection mode of the load circuit 15 are specifically limited.
In an embodiment of the present invention, when liquid crystal display works normally, the output of gamma output circuit 11 one
First gamma reference voltage value is described to be controlled by the first gamma reference voltage value to the source driving chip 30
The voltage data signal that source driving chip 30 exports；When liquid crystal display shuts down, the load circuit 15 is connected to described
On gamma output circuit 11, at this time, the gamma output circuit 11 will export one second gamma reference voltage value to the source electrode
Driving chip 30, and the load circuit 15 loaded will adjust the rate of decay of the second gamma reference voltage value, and then
The power down speed of the voltage data signal of the output of source drive module 30 is controlled by the second gamma reference voltage value.
In an embodiment of the present invention, the gamma driving chip 10 further includes controller 17, the controller 17 with
The common electrode output circuit 13 and gamma output circuit 11 are electrically connected, and are exported to control input to the common electrode
The signal of circuit 13 and gamma output circuit 11.
In an embodiment of the present invention, the gamma driving chip 10 is a programmable gamma driving chip, corresponding
, 17 control input of controller to the common electrode output circuit 13 and gamma can be passed through by way of programming
The signal of output circuit 11.
In an embodiment of the present invention, exported by the controller 17 to the common electrode output circuit 13 and gamma
The signal of output circuit 11 is digital signal, and the multiple data-signal can be the same or different, and the controller
17 be successively to be exported data-signal to the gamma output circuit 11 and the common electrode output circuit according to clock signal
13。
In an embodiment of the present invention, each gamma output circuit 11 includes D/A conversion unit 111 and puts
Big device 113, one end of the D/A conversion unit 111 is connected to the controller 17, the other end is connected to the amplifier 113
Input terminal, the output terminal of the amplifier 113 is connected to the source driving chip 30, and can be when liquid crystal display shuts down
It is connected to corresponding load circuit 15.
In the present embodiment, the digital signal received from the controller 17 is turned by D/A conversion unit 111
It is changed to analog signal, and after further amplifying via amplifier 113, which is exported to described
Source driving chip 30, to improve the driving force of the source driving chip 30.Also, should when liquid crystal display shuts down
The selection of gamma output circuit 11 is connected to one or more of the load circuit 15 resistance R, to pass through accessed resistance R
To adjust the power down speed for the voltage data signal that the source driving chip 30 exports.
In an embodiment of the present invention, the common electrode output circuit 13 include D/A conversion unit 131 and voltage with
With device 133, one end of the D/A conversion unit 131 is connected to the control chip 17, the other end be connected to the voltage with
With the input terminal of device 133, the output terminal of the voltage follower 133 is connected to the source driving chip 30, and can be in liquid
Crystal display is connected to corresponding load circuit 15 when shutting down.In embodiments of the present invention, the D/A conversion unit 111 and institute
It can be digital analog converter (Digital to analog converter, DAC) to state D/A conversion unit 131, it is used for
Convert digital signals into analog signal (in the form of electric current, voltage or electric charge).
In the present embodiment, the digital signal that will be received by D/A conversion unit 131 at the controller 17
Analog signal is converted to, and is exported via voltage follower 133 to the source driving chip 30, is driven with control by the source electrode
Dynamic chip 30 is exported to the common-battery pole tension of the liquid crystal display.Also, when liquid crystal display shuts down, the common electrode is defeated
Go out circuit 13 and be connected to one or more of load circuit 15 resistance R, the common-battery is adjusted to pass through accessed resistance R
The power down speed of pole tension.
The source drive module of the present invention, when liquid crystal display is normally shown, the gamma pio chip 10 controls institute
State source driving chip 30 to export to the voltage data signal of the liquid crystal display 90 and common-battery pole tension, and pass through institute
State pressure difference of the voltage data signal together between electrode voltage and drive liquid crystal deflection to different angles to realize display；Work as liquid crystal
When display shuts down, the gamma chip 10 accesses one or more resistance R as load from the load circuit 15, to divide
The power down speed of voltage data signal that the source driving chip 30 exports electrode voltage together is not adjusted, and it is corresponding different
Source driving chip the resistance R of access different resistance values can be selected to be adjusted so that the data-signal after shutdown
Pressure difference of the voltage together between electrode voltage levels off to 0, you can eliminates the image retention problem for the flicker that the pressure difference produces.
The present invention also provides a kind of liquid crystal display with above-mentioned source drive module.
Above-mentioned source drive module source drive module and liquid crystal display, when liquid crystal display shuts down, bear from described
The resistance R that match quantity and resistance value are accessed in circuit 15 is carried as load, it is defeated to adjust the source driving chip 30 respectively
The power down speed of the voltage data signal gone out electrode voltage together, and corresponding different source driving chip 30 can select to connect
Enter the resistance R of different resistance values and quantity to be adjusted so that the voltage data signal of liquid crystal display after shut down with
Pressure difference between common-battery pole tension levels off to 0, you can eliminates the image retention problem for the flicker that the pressure difference produces.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine the embodiment or example particular features, structures, materials, or characteristics described
It is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms differs
Surely identical embodiment or example are referred to.Moreover, the particular features, structures, materials, or characteristics of description can be any one
Combined in an appropriate manner in a or multiple embodiments or example.
The source drive module provided above the embodiment of the present invention and the liquid crystal with the source drive module
Show that device is described in detail, specific case used herein is set forth the principle of the present invention and embodiment, with
The explanation of upper embodiment is only intended to help the method and its core concept for understanding the present invention；Meanwhile for the general of this area
Technical staff, according to the thought of the present invention, there will be changes in specific embodiments and applications, in conclusion
This specification content should not be construed as limiting the invention.
Claims (10)
1. a kind of source drive module, including gamma driving chip and with liquid crystal display and gamma driving chip electricity
Property connection source driving chip, it is characterised in that the gamma driving chip include electrically connect with the source driving chip
The multiple gamma output circuits and a common electrode output circuit connect, the gamma output circuit is controlling by the source electrode
Driving chip is exported to the voltage data signal of the liquid crystal display, and the common electrode output circuit is controlling by described
Source driving chip exports to the common-battery pole tension of the liquid crystal display, the gamma driving chip and further includes multiple loads
Circuit, the common electrode output circuit are electrically connected with the load circuit, and pass through connected load circuit in shutdown
Adjusting the power down speed of the common-battery pole tension, each gamma output circuit load circuit corresponding with one is electrically connected,
And the power down speed of the voltage data signal is adjusted by the load circuit connected in shutdown.
2. source drive module as claimed in claim 1, it is characterised in that the load circuit includes multiple resistance and more
A switch, one end ground connection of each resistance, the other end are connected to the output of the gamma output circuit by the switch
End or the output terminal of the common electrode output circuit.
3. source drive module as claimed in claim 2, it is characterised in that the resistance value of the load circuit is adjustable, when
During with different source driving chips, the gamma output circuit is switched from described with the common electrode output circuit by described
The resistance for the resistance value that matches is accessed in load circuit.
4. source drive module as claimed in claim 2, it is characterised in that the load circuit includes three resistance and three
A switch, one end ground connection of each resistance, the other end are connected to the output of the gamma output circuit by the switch
End or the output terminal of the common electrode output circuit, wherein, the resistance value of three resistance is identical or part is identical.
5. source drive module as claimed in claim 2, it is characterised in that each switch is controlled by I2C signals
Closure disconnects.
6. source drive module as claimed in claim 1, it is characterised in that the gamma driving chip further includes controller,
The controller is electrically connected with the common electrode output circuit and the gamma output circuit, to control input to institute
State the signal of common electrode output circuit and the gamma output circuit.
7. source drive module as claimed in claim 6, it is characterised in that input to the signal of the gamma output circuit and be
Digital signal, the gamma output circuit include D/A conversion unit and amplifier, and one end of the D/A conversion unit connects
Be connected to the controller, the other end is connected to the input terminal of the amplifier, the output terminal of the amplifier is connected to the source
Pole driving chip, and may be selected to be connected to corresponding load circuit.
8. source drive module as claimed in claim 6, it is characterised in that input to the signal of the common electrode output circuit
For digital signal, the common electrode output circuit includes D/A conversion unit and voltage follower, the D/A conversion unit
One end is connected to the control chip, the other end is connected to the voltage follower, the output terminal connection of the voltage follower
To the source driving chip, and may be selected to be connected to corresponding load circuit.
9. the source drive module as described in claim 1 to 8 any one, it is characterised in that the gamma driving chip is
One programmable gamma driving chip.
10. a kind of liquid crystal display, it is characterised in that the liquid crystal display is included as described in claim 1 to 9 any one
Source drive module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711157735.5A CN107945753B (en) | 2017-11-20 | 2017-11-20 | Source drive mould group and liquid crystal display |
| PCT/CN2017/114022 WO2019095440A1 (en) | 2017-11-20 | 2017-11-30 | Source driver module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711157735.5A CN107945753B (en) | 2017-11-20 | 2017-11-20 | Source drive mould group and liquid crystal display |
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| Publication Number | Publication Date |
|---|---|
| CN107945753A true CN107945753A (en) | 2018-04-20 |
| CN107945753B CN107945753B (en) | 2019-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711157735.5A Active CN107945753B (en) | 2017-11-20 | 2017-11-20 | Source drive mould group and liquid crystal display |
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| Country | Link |
|---|---|
| CN (1) | CN107945753B (en) |
| WO (1) | WO2019095440A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109712590A (en) * | 2019-03-08 | 2019-05-03 | 惠科股份有限公司 | The driving circuit and display device of display panel |
| CN110111752A (en) * | 2019-04-08 | 2019-08-09 | 北海惠科光电技术有限公司 | A kind of driving circuit and display device |
| CN111354289A (en) * | 2018-12-24 | 2020-06-30 | 硅工厂股份有限公司 | Source electrode driving circuit |
| CN112051783A (en) * | 2020-09-22 | 2020-12-08 | 禹创半导体(深圳)有限公司 | A forced pull-to-ground for data output in a power-free mode |
| WO2021207889A1 (en) * | 2020-04-13 | 2021-10-21 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN113870807A (en) * | 2021-09-22 | 2021-12-31 | 惠州视维新技术有限公司 | Display, electronic device, and method for driving display |
| CN114267311A (en) * | 2021-12-29 | 2022-04-01 | 惠科股份有限公司 | Source electrode driving circuit, source electrode driving method and display panel |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107945753B (en) | 2019-08-20 |
| WO2019095440A1 (en) | 2019-05-23 |
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