CN109192162A - Thin film transistor (TFT) LCD driving device - Google Patents
Thin film transistor (TFT) LCD driving device Download PDFInfo
- Publication number
- CN109192162A CN109192162A CN201811174781.0A CN201811174781A CN109192162A CN 109192162 A CN109192162 A CN 109192162A CN 201811174781 A CN201811174781 A CN 201811174781A CN 109192162 A CN109192162 A CN 109192162A
- Authority
- CN
- China
- Prior art keywords
- voltage
- amplifier
- buffer amplifier
- gray scale
- tft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- 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 thin film transistor (TFT) LCD driving devices, are related to integrated circuit fields.Thin film transistor (TFT) LCD driving device is at work, first buffer amplifier receives the positive gray scale voltage of input, and Hyblid Buffer Amplifier is carried out to positive gray scale voltage and is exported to polarity switching module, second buffer amplifier receives the negative gray scale voltage of input, and Hyblid Buffer Amplifier is carried out to negative gray scale voltage and is exported to polarity switching module, and first buffer amplifier, second buffer amplifier is in half voltage operating mode, polarity switching module is to the positive gray scale voltage after Hyblid Buffer Amplifier, negative gray scale voltage carries out polarity switching and exports, thus greatly reduce the whole quiescent dissipation of thin film transistor (TFT) LCD driving device, and single unit system circuit structure is simple, it is easily integrated, manufacturing cost is low.
Description
Technical field
The present invention relates to integrated circuit fields, in particular to a kind of thin film transistor (TFT) LCD driving device.
Background technique
The construction of LCD is that liquid crystal cell is placed in the parallel glass substrate of two panels, and it is (thin that TFT is arranged on lower baseplate glass
Film transistor), colored filter is set on upper substrate glass, is changed by signal on TFT and voltage to control liquid crystal molecule
Rotation direction, thus reach control each pixel polarised light outgoing whether and reach display purpose.Thin film field-effect crystal
Pipe LCD has a kind of characteristic, it is constant can not to be exactly permanently affixed to some voltage, if over time, even if voltage is taken
Disappear, liquid crystal molecule can not be rotated because of the variation of electric field again because of the destruction of characteristic, to form different grayscale.Institute
Two kinds of polarity are just divided into the display voltage in liquid crystal display, one is positive polarity, and the other is negative polarity.Work as display
It when picture is motionless always, still can ceaselessly replace by positive-negative polarity, it is motionless reach display picture, while liquid crystal molecule is not
It is deteriorated the result of characteristic.
And the thin film transistor (TFT) LCD driving device of traditional technology passes through polarity switching in positive gray scale voltage and negative gray scale voltage
Afterwards, it then again by the first buffer amplifier, the second buffer amplifier, is finally exported respectively in odd chanel and even-numbered channels,
Because of the presence of polarity switching, the output of odd chanel can be positive gray scale voltage, be also possible to negative gray scale voltage；Similarly even number
The output in channel can be positive gray scale voltage, be also possible to negative gray scale voltage, so that the first buffer amplifier, the second buffering
The power source supplying voltage of amplifier is VDDA, voltage-to-ground GND, more so as to cause the port number of whole device, whole quiet
State power consumption is very big.
Summary of the invention
In view of this, the embodiment of the present invention is designed to provide a kind of thin film transistor (TFT) LCD driving device, on improving
The problem of stating.
The embodiment of the invention provides a kind of thin film transistor (TFT) LCD driving device, the thin film transistor (TFT) LCD driving device
Including the first buffer amplifier, the second buffer amplifier, polarity switching module, first buffer amplifier is cut with the polarity
Block electrical connection is changed the mold, second buffer amplifier is electrically connected with the polarity switching module,
Wherein, first buffer amplifier positive gray scale voltage for receiving input, and positive gray scale voltage is delayed
Punching is amplified and is exported to the polarity switching module, the second buffer amplifier negative gray scale voltage for receiving input, and
Hyblid Buffer Amplifier is carried out to negative gray scale voltage and is exported to polarity switching module, the polarity switching module is used for according to Hyblid Buffer Amplifier
Positive gray scale voltage, negative gray scale voltage afterwards exports positive gray scale voltage, negative gray scale voltage respectively or exports negative gray scale voltage, just respectively
Gray scale voltage.
Further, the operating voltage of first buffer amplifier and the positive gray scale voltage range of input are consistent, described
The operating voltage of second buffer amplifier is consistent with the negative gray scale voltage range of input.
Further, first buffer amplifier, second buffer amplifier are in half voltage operating mode, institute
The power source supplying voltage for stating the first buffer amplifier is VDDA, voltage-to-ground HVDD, the power supply of second buffer amplifier
Supply voltage is HVDD, voltage-to-ground GND, wherein the HVDD is in voltage-to-ground GND and power source supplying voltage VDDA
Point voltage.
Further, first buffer amplifier, second buffer amplifier are in half voltage operating mode, institute
The power source supplying voltage for stating the first buffer amplifier is HVDD, voltage-to-ground GND, and the power supply of second buffer amplifier supplies
Piezoelectric voltage is VDDA, voltage-to-ground HVDD, wherein the HVDD is in voltage-to-ground GND and power source supplying voltage VDDA
Point voltage.
Further, first buffer amplifier includes at least two first trsanscondutance amplifiers, and described at least two the
One trsanscondutance amplifier is sequentially connected electrically, and along the electrode input end of preceding first trsanscondutance amplifier of signal transmission direction for connecing
Receive the positive gray scale voltage of input, and the negative input along preceding first trsanscondutance amplifier of signal transmission direction and the polarity
The input terminal of switching module connects.
Further, at least two first trsanscondutance amplifier include the first level-one trsanscondutance amplifier, the first second level across
Lead amplifier, the electrode input end of the first level-one trsanscondutance amplifier positive gray scale voltage for receiving input, described first
The output end of level-one trsanscondutance amplifier is electrically connected with the input terminal of the first second level trsanscondutance amplifier, the first level-one mutual conductance
The negative input of amplifier is electrically connected with the output end of the first second level trsanscondutance amplifier and the polarity switching module.
Further, second buffer amplifier includes at least two second trsanscondutance amplifiers, and described at least two the
Two trsanscondutance amplifiers are sequentially connected electrically, and along the electrode input end of preceding second trsanscondutance amplifier of signal transmission direction for connecing
Receive the positive gray scale voltage of input, and the negative input along preceding second trsanscondutance amplifier of signal transmission direction and the polarity
The input terminal of switching module connects.
Further, at least two second trsanscondutance amplifier include the second level-one trsanscondutance amplifier, the second second level across
Lead amplifier, the electrode input end of the second level-one trsanscondutance amplifier positive gray scale voltage for receiving input, described second
The output end of level-one trsanscondutance amplifier is electrically connected with the input terminal of the second second level trsanscondutance amplifier, the second level-one mutual conductance
The negative input of amplifier is electrically connected with the output end of the second second level trsanscondutance amplifier and the polarity switching module.
Further, thin film transistor (TFT) LCD driving device further includes the first fictitious load, the second fictitious load, and described
One fictitious load is serially connected between the polarity switching module and thin film transistor (TFT) LCD to be driven, second simulation
Load is serially connected between the polarity switching module and thin film transistor (TFT) LCD to be driven.
Further, first fictitious load includes first resistor, first capacitor, the first resistor and described first
Capacitor electrical connection, second fictitious load include second resistance, the second capacitor, and the second resistance and second capacitor are electric
Connection.
Compared with prior art, thin film transistor (TFT) LCD driving device provided by the invention at work, the first Hyblid Buffer Amplifier
Device receives the positive gray scale voltage of input, and carries out Hyblid Buffer Amplifier to positive gray scale voltage and export slow to polarity switching module, second
The negative gray scale voltage that amplifier receives input is rushed, and Hyblid Buffer Amplifier is carried out to negative gray scale voltage and is exported to polarity switching module,
And first buffer amplifier, the second buffer amplifier are in half voltage operating mode, after polarity switching module is to Hyblid Buffer Amplifier
Positive gray scale voltage, negative gray scale voltage polarity switching and export, thus greatly reduce thin film transistor (TFT) LCD driving device
Whole quiescent dissipation, and single unit system circuit structure is simple, is easily integrated, and manufacturing cost is low.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Fig. 1 shows the circuit diagram of the first embodiment of thin film transistor (TFT) LCD driving device provided by the invention；
Fig. 2 shows the circuit diagrams of second of embodiment of thin film transistor (TFT) LCD driving device provided by the invention.
Icon: the first buffer amplifier of 101-；The second buffer amplifier of 102-；103- the first level-one trsanscondutance amplifier；
104- the first second level trsanscondutance amplifier；105- the second level-one trsanscondutance amplifier；106- the second second level trsanscondutance amplifier；107- first
Fictitious load；The second fictitious load of 108-；109- polarity switching module.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Fig. 1, Fig. 2 are please referred to, the embodiment of the invention provides a kind of thin film transistor (TFT) LCD driving device, thin film transistor (TFT)s
LCD driving device includes the first buffer amplifier 101, the second buffer amplifier 102, polarity switching module 109, and the first buffering is put
Big device 101 is electrically connected with polarity switching module 109, and the second buffer amplifier 102 is electrically connected with polarity switching module 109.
Wherein, the positive gray scale voltage for receiving input of the first buffer amplifier 101, and positive gray scale voltage is buffered
Amplify and export to polarity switching module 109, the negative gray scale voltage for receiving input of the second buffer amplifier 102, and to negative
Gray scale voltage carries out Hyblid Buffer Amplifier and exports to polarity switching module 109, and polarity switching module 109 is used for according to after Hyblid Buffer Amplifier
Positive gray scale voltage, negative gray scale voltage exports positive gray scale voltage, negative gray scale voltage respectively or exports negative gray scale voltage, positive ash respectively
Rank voltage.
As one of embodiment, the electrode input end of the first buffer amplifier 101 and external positive gray scale voltage are defeated
Enter end connection, the negative input of the first buffer amplifier 101 is connect with the output end of the first buffer amplifier 101, and first is slow
The output end for rushing amplifier 102 is electrically connected with the input terminal of polarity switching module 109, and the anode of the second buffer amplifier 102 is defeated
Enter end to connect with external positive gray scale voltage input terminal, the negative input and the second buffer amplifier of the second buffer amplifier 102
102 output end connection, the output end of the second buffer amplifier 102 are electrically connected with the input terminal of polarity switching module 109.
Specifically, the first buffer amplifier 101 includes at least two first trsanscondutance amplifiers, and at least two first mutual conductances are put
Big device is sequentially connected in series；First buffer amplifier 101 includes at least two second trsanscondutance amplifiers, at least two second mutual conductances amplification
Device is sequentially connected in series.It include two the first trsanscondutance amplifiers, the second Hyblid Buffer Amplifier with the first buffer amplifier 101 in the present embodiment
Device 102 for two the second trsanscondutance amplifiers including being illustrated, wherein two trsanscondutance amplifiers are respectively the first level-one mutual conductance
Amplifier 103, the first second level trsanscondutance amplifier 104；Two the second trsanscondutance amplifiers are respectively the second level-one trsanscondutance amplifier
105, the second second level trsanscondutance amplifier 106.Of course, in the present embodiment, the first buffer amplifier 101 can also include three,
The first four or even more trsanscondutance amplifiers, the second buffer amplifier 102 can also include three, four or even more the
Two trsanscondutance amplifiers, are merely illustrative herein.Of course, the first buffer amplifier 101 includes two the first mutual conductance amplifications
Device, the second buffer amplifier 102 include two the second trsanscondutance amplifiers, can make entire thin film transistor (TFT) LCD driving device
Circuit structure it is simple, it is at low cost.
As one of embodiment, the operating voltage of the first buffer amplifier 101 and the positive gray scale voltage model of input
Enclose that consistent, the operating voltage of the second buffer amplifier 102 is consistent with the negative gray scale voltage range of input, for example, the first buffering is put
Big device 101, the second buffer amplifier 102 are in half voltage operating mode, the power source supplying voltage of the first buffer amplifier 101
For VDDA, voltage-to-ground HVDD, the power source supplying voltage of the second buffer amplifier 102 is HVDD, voltage-to-ground GND,
In, the HVDD is the mid-point voltage of voltage-to-ground GND and power source supplying voltage VDDA.Specifically, as shown in Figure 1, each
The maximum supply voltage section of one trsanscondutance amplifier is (GND, VDDA), and the first buffer amplifier 101, the second buffer amplifier
102 are in half voltage operating mode, half voltage Working mould locating for the first buffer amplifier 101, the second buffer amplifier 102
Formula are as follows: the power source supplying voltage of each first trsanscondutance amplifier is VDDA, voltage-to-ground HVDD, HVDD are voltage-to-ground GND
With the mid-point voltage of power source supplying voltage VDDA, the power source supplying voltage of the second buffer amplifier 102 is HVDD, voltage-to-ground is
(the maximum supply voltage section of i.e. each second trsanscondutance amplifier is (GND, VDDA), the electricity of each second trsanscondutance amplifier to GND
Source supply voltage is HVDD, voltage-to-ground GND).For example, GND=0V, VDDA=18V, then HVDD=9V.In the present embodiment,
Assuming that the quiescent current of the first level-one trsanscondutance amplifier 103, the first second level trsanscondutance amplifier 104 is Iq1, the second level-one mutual conductance is put
Big device 105, the second second level trsanscondutance amplifier 106 quiescent current be Iq2, then the static state of thin film transistor (TFT) LCD driving device
Power consumption is HVDD* (Iq1+Iq2) * 2=VDDA* (Iq1+Iq2), and thin film transistor (TFT) LCD driving device quiescent dissipation reduces
50%.
Alternatively embodiment, the operating voltage of the first buffer amplifier 101 and the positive gray scale voltage model of input
Enclose that consistent, the operating voltage of the second buffer amplifier 102 is consistent with the negative gray scale voltage range of input, for example, the first buffering is put
Big device 101, the second buffer amplifier 102 are in half voltage operating mode, the power source supplying voltage of the first buffer amplifier 101
For HVDD, voltage-to-ground GND, the power source supplying voltage of the second buffer amplifier 102 is VDDA, voltage-to-ground HVDD,
In, the HVDD is the mid-point voltage of voltage-to-ground GND and power source supplying voltage VDDA.As shown in Fig. 2, each first mutual conductance is put
The maximum supply voltage section of big device is (GND, VDDA), and the first buffer amplifier 101, the second buffer amplifier 102 are located
In half voltage operating mode, half voltage operating mode locating for the first buffer amplifier 101, the second buffer amplifier 102 are as follows: every
The power source supplying voltage of a first trsanscondutance amplifier is HVDD, voltage-to-ground GND, HVDD are voltage-to-ground GND and power supply supplies
The mid-point voltage of piezoelectric voltage VDDA, the power source supplying voltage of the second buffer amplifier 102 is VDDA, voltage-to-ground be HVDD (i.e.
The maximum supply voltage section of each second trsanscondutance amplifier is (GND, VDDA), the power supply power supply of each second trsanscondutance amplifier
Voltage is VDDA, voltage-to-ground HVDD.For example, GND=0V, VDDA=18V, then HVDD=9V.In the present embodiment, it is assumed that the
One level-one trsanscondutance amplifier 103, the first second level trsanscondutance amplifier 104 quiescent current be Iq1, the second level-one trsanscondutance amplifier
105, the quiescent current of the second second level trsanscondutance amplifier 106 is Iq2, then the quiescent dissipation of thin film transistor (TFT) LCD driving device
For HVDD* (Iq1+Iq2) * 2=VDDA* (Iq1+Iq2), thin film transistor (TFT) LCD driving device quiescent dissipation reduces 50%.
In addition, thin film transistor (TFT) LCD driving device further includes the first fictitious load 107, the second fictitious load 108, first
Fictitious load 107 is serially connected between polarity switching module 109 and thin film transistor (TFT) LCD to be driven, the second fictitious load 108 string
It is connected between polarity switching module 109 and thin film transistor (TFT) LCD to be driven.Wherein, the first fictitious load 107 includes the first electricity
Resistance and first capacitor, first resistor are connected with first capacitor, and the second fictitious load 108 also may include second resistance and the second electricity
Hold, second resistance is connected with the second capacitor.
Compared with prior art, thin film transistor (TFT) LCD driving device provided by the invention at work, the first Hyblid Buffer Amplifier
Device receives the positive gray scale voltage of input, and carries out Hyblid Buffer Amplifier to positive gray scale voltage and export slow to polarity switching module, second
The negative gray scale voltage that amplifier receives input is rushed, and Hyblid Buffer Amplifier is carried out to negative gray scale voltage and is exported to polarity switching module,
And first buffer amplifier, the second buffer amplifier are in half voltage operating mode, after polarity switching module is to Hyblid Buffer Amplifier
Positive gray scale voltage, negative gray scale voltage polarity switching and export, thus greatly reduce thin film transistor (TFT) LCD driving device
Whole quiescent dissipation, and single unit system circuit structure is simple, is easily integrated, and manufacturing cost is low.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.It needs
Illustrate, herein, relational terms such as first and second and the like be used merely to by an entity or operation with
Another entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this realities
The relationship or sequence on border.Moreover, the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should also be noted that similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and explained.
Claims (10)
1. a kind of thin film transistor (TFT) LCD driving device, which is characterized in that the thin film transistor (TFT) LCD driving device includes first
Buffer amplifier, the second buffer amplifier, polarity switching module, first buffer amplifier and polarity switching module electricity
Connection, second buffer amplifier are electrically connected with the polarity switching module,
Wherein, first buffer amplifier positive gray scale voltage for receiving input, and buffering is carried out to positive gray scale voltage and is put
It greatly and exports to the polarity switching module, the second buffer amplifier negative gray scale voltage for receiving input, and to negative
Gray scale voltage carries out Hyblid Buffer Amplifier and exports to polarity switching module, and the polarity switching module is used for according to after Hyblid Buffer Amplifier
Positive gray scale voltage, negative gray scale voltage export positive gray scale voltage, negative gray scale voltage respectively or export negative gray scale voltage, positive grayscale respectively
Voltage.
2. thin film transistor (TFT) LCD driving device according to claim 1, which is characterized in that first buffer amplifier
Operating voltage the second buffer amplifier consistent, described with the positive gray scale voltage range of input operating voltage and input negative ash
Rank voltage range is consistent.
3. thin film transistor (TFT) LCD driving device according to claim 2, which is characterized in that first buffer amplifier,
The second caching amplifier is in half voltage operating mode, wherein the power source supplying voltage of first buffer amplifier
For VDDA, voltage-to-ground HVDD, the power source supplying voltage of second buffer amplifier is HVDD, voltage-to-ground GND,
In, the HVDD is the mid-point voltage of voltage-to-ground GND and power source supplying voltage VDDA.
4. thin film transistor (TFT) LCD driving device according to claim 2, which is characterized in that first buffer amplifier,
The second caching amplifier is in half voltage operating mode, wherein the power source supplying voltage of first buffer amplifier
For HVDD, voltage-to-ground GND, the power source supplying voltage of second buffer amplifier is VDDA, voltage-to-ground HVDD,
In, the HVDD is the mid-point voltage of voltage-to-ground GND and power source supplying voltage VDDA.
5. thin film transistor (TFT) LCD driving device according to claim 3 or 4, which is characterized in that first Hyblid Buffer Amplifier
Device includes at least two first trsanscondutance amplifiers, and at least two first trsanscondutance amplifier is sequentially connected electrically, and is passed along signal
The electrode input end positive gray scale voltage for receiving input of defeated preceding first trsanscondutance amplifier in direction, and along signal transmission side
It is connect to the negative input of preceding first trsanscondutance amplifier with the input terminal of the polarity switching module.
6. thin film transistor (TFT) LCD driving device according to claim 5, which is characterized in that described at least two first across
Leading amplifier includes the first level-one trsanscondutance amplifier, the first second level trsanscondutance amplifier, and the first level-one trsanscondutance amplifier is just
Pole input terminal positive gray scale voltage for receiving input, the output end of the first level-one trsanscondutance amplifier and first second level
The input terminal of trsanscondutance amplifier is electrically connected, the negative input of the first level-one trsanscondutance amplifier and the first second level mutual conductance
The output end of amplifier and polarity switching module electrical connection.
7. thin film transistor (TFT) LCD driving device according to claim 3 or 4, which is characterized in that second Hyblid Buffer Amplifier
Device includes at least two second trsanscondutance amplifiers, and at least two second trsanscondutance amplifier is sequentially connected electrically, and is passed along signal
The electrode input end positive gray scale voltage for receiving input of defeated preceding second trsanscondutance amplifier in direction, and along signal transmission side
It is connect to the negative input of preceding second trsanscondutance amplifier with the input terminal of the polarity switching module.
8. thin film transistor (TFT) LCD driving device according to claim 7, which is characterized in that described at least two second across
Leading amplifier includes the second level-one trsanscondutance amplifier, the second second level trsanscondutance amplifier, and the second level-one trsanscondutance amplifier is just
Pole input terminal positive gray scale voltage for receiving input, the output end of the second level-one trsanscondutance amplifier and second second level
The input terminal of trsanscondutance amplifier is electrically connected, the negative input of the second level-one trsanscondutance amplifier and the second second level mutual conductance
The output end of amplifier and polarity switching module electrical connection.
9. thin film transistor (TFT) LCD driving device according to claim 1, which is characterized in that thin film transistor (TFT) LCD driving dress
Setting further includes the first fictitious load, the second fictitious load, and first fictitious load is serially connected with the polarity switching module
Between thin film transistor (TFT) LCD to be driven, second fictitious load be serially connected with the polarity switching module with wait drive
Between dynamic thin film transistor (TFT) LCD.
10. thin film transistor (TFT) LCD driving device according to claim 8, which is characterized in that the first fictitious load packet
First resistor, first capacitor are included, the first resistor is electrically connected with the first capacitor, and second fictitious load includes second
Resistance, the second capacitor, the second resistance are electrically connected with second capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174781.0A CN109192162A (en) | 2018-10-09 | 2018-10-09 | Thin film transistor (TFT) LCD driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811174781.0A CN109192162A (en) | 2018-10-09 | 2018-10-09 | Thin film transistor (TFT) LCD driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109192162A true CN109192162A (en) | 2019-01-11 |
Family
ID=64947675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811174781.0A Pending CN109192162A (en) | 2018-10-09 | 2018-10-09 | Thin film transistor (TFT) LCD driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109192162A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110728960A (en) * | 2019-10-21 | 2020-01-24 | 湖南国科微电子股份有限公司 | LCD drive circuit and display device |
| CN115148167A (en) * | 2022-08-15 | 2022-10-04 | 北京京东方技术开发有限公司 | Driving circuit, driving method thereof and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806968A (en) * | 2009-09-01 | 2010-08-18 | 友达光电股份有限公司 | Source driver and method for driving display |
| CN101930706A (en) * | 2009-06-25 | 2010-12-29 | 索尼公司 | Signal-line driving circuit, display apparatus and electronic apparatus |
| CN102436789A (en) * | 2011-11-18 | 2012-05-02 | 友达光电股份有限公司 | Display panel and method of driving the same |
| CN101873106B (en) * | 2009-04-21 | 2013-11-06 | 瑞萨电子株式会社 | Operational amplifier, driver and display |
| CN104732944A (en) * | 2015-04-09 | 2015-06-24 | 京东方科技集团股份有限公司 | Source drive circuit, source drive method and display device |
-
2018
- 2018-10-09 CN CN201811174781.0A patent/CN109192162A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873106B (en) * | 2009-04-21 | 2013-11-06 | 瑞萨电子株式会社 | Operational amplifier, driver and display |
| CN101930706A (en) * | 2009-06-25 | 2010-12-29 | 索尼公司 | Signal-line driving circuit, display apparatus and electronic apparatus |
| CN101806968A (en) * | 2009-09-01 | 2010-08-18 | 友达光电股份有限公司 | Source driver and method for driving display |
| CN102436789A (en) * | 2011-11-18 | 2012-05-02 | 友达光电股份有限公司 | Display panel and method of driving the same |
| CN104732944A (en) * | 2015-04-09 | 2015-06-24 | 京东方科技集团股份有限公司 | Source drive circuit, source drive method and display device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110728960A (en) * | 2019-10-21 | 2020-01-24 | 湖南国科微电子股份有限公司 | LCD drive circuit and display device |
| CN115148167A (en) * | 2022-08-15 | 2022-10-04 | 北京京东方技术开发有限公司 | Driving circuit, driving method thereof and display device |
| CN115148167B (en) * | 2022-08-15 | 2023-10-24 | 北京京东方技术开发有限公司 | Driving circuit, driving method thereof and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103886838B (en) | Pixel compensation circuit, array base palte and display device | |
| CN102254503B (en) | Shift register unit, grid driving device used for display and liquid crystal display | |
| CN105185306A (en) | Pixel circuit, driving method for the pixel circuit, display substrate and display apparatus | |
| CN107909971B (en) | GOA circuit | |
| CN103280200A (en) | Shift register unit, gate drive circuit and display device | |
| CN103745685B (en) | Active matric organic LED panel driving circuit and driving method | |
| CN104361878A (en) | Display panel and driving method thereof as well as display device | |
| CN103021331A (en) | Pixel drive circuit, pixel drive method, pixel array substrate and pixel displaying device | |
| CN102749775A (en) | Array substrate, display device and method for driving array substrate | |
| CN106652932B (en) | Liquid crystal display device and its driving method | |
| EP2083414A3 (en) | Electrophoretic display device, method of driving the same, and electronic apparatus | |
| KR101230313B1 (en) | LEVEL SHIFTER and DRIVING MATHOD thereof | |
| CN105427792A (en) | Pixel compensation circuit and driving method thereof, display panel, and display apparatus | |
| CN109192162A (en) | Thin film transistor (TFT) LCD driving device | |
| CN104537989A (en) | Bidirectional scan electric charge sharing type pixel structure and driving method thereof | |
| Luo et al. | Portable multi‐gray scale video playing scheme for high‐performance electrowetting displays | |
| CN102779481A (en) | Drive circuit for OLED (Organic Light Emitting Diode) panel | |
| CN104167170A (en) | Pixel circuit and driving method thereof, and display device | |
| CN100505025C (en) | Liquid crystal display device and driving method thereof | |
| CN109064972A (en) | Dot structure, driving method, pixel circuit and display panel | |
| CN103354081B (en) | Pixel driving current extraction element and pixel driving current extracting method | |
| CN102955309B (en) | A kind of array base palte, display panel, display device and driving method thereof | |
| CN100414596C (en) | Liquid crystal display, its drive circuit and driving method | |
| TWI473064B (en) | Operating method and display panel using the same | |
| CN104217669A (en) | Gate drive circuit, drive method thereof and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |