CN107134248A - Source electrode drive circuit and its voltage control method of output signal, display device - Google Patents
Source electrode drive circuit and its voltage control method of output signal, display device Download PDFInfo
- Publication number
- CN107134248A CN107134248A CN201710537782.6A CN201710537782A CN107134248A CN 107134248 A CN107134248 A CN 107134248A CN 201710537782 A CN201710537782 A CN 201710537782A CN 107134248 A CN107134248 A CN 107134248A
- Authority
- CN
- China
- Prior art keywords
- voltage
- output signal
- output
- polarity
- signal
- 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.)
- Granted
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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/08—Power processing, i.e. workload management for processors involved in display operations, such as CPUs or GPUs
Landscapes
- Engineering & Computer Science (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)
Abstract
The invention discloses a kind of source electrode drive circuit and its voltage control method of output signal, display device, belong to display technology field.The voltage control method of the output signal of the source electrode drive circuit includes：Whether the level for the polarity control signal that detection time schedule controller is sent occurs saltus step；When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is the gamma reference voltage of positive polarity, increase the voltage of the output signal；When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is the gamma reference voltage of negative polarity, reduce the voltage of the output signal.The method that the present invention is provided can improve the efficiency of charging, reduce charging duration.
Description
Technical field
The present invention relates to display technology field, the voltage control of more particularly to a kind of source electrode drive circuit and its output signal
Method, display device.
Background technology
Display device can typically include display panel and the drive circuit for driving the display panel.Driving electricity
Road can include time schedule controller (English：Timing controller；Abbreviation TCON), gate driving circuit and source drive
Circuit.
In correlation technique, the source electrode drive circuit can be according to gamma reference voltage, and the data signal that TCON is inputted turns
Change the analog signal of correspondence gray scale voltage into and export to each pixel cell of display panel.At present, in order to improve display device
Display effect, it is general inverted using frame by the way of drive the electricity that each pixel cell is stored in display panel, i.e. display panel
It is opposite within the cycle of adjacent two frame to press polarity.In the type of drive that the frame is inverted, time schedule controller can be to source electrode
Drive circuit output polarity control signal, source electrode drive circuit can be according to the height of the level of the polarity control signal, adjustment
The polarity of the analog signal exported to display panel.
But, source electrode drive circuit to display panel when exporting the analog signal, because data signal line is present necessarily
Impedance, causes that the charging interval of pixel cell apart from the source electrode drive circuit farther out is longer, and charge efficiency is relatively low.
The content of the invention
In order to which the charging interval is longer when solving that source electrode drive circuit charges to pixel cell in correlation technique, charge efficiency compared with
Low the problem of, the invention provides a kind of source electrode drive circuit and its voltage control method of output signal, display device.It is described
Technical scheme is as follows：
First aspect is driven there is provided a kind of voltage control method of the output signal of source electrode drive circuit applied to source electrode
Dynamic circuit, methods described includes：
Whether the level for the polarity control signal that detection time schedule controller is sent occurs saltus step；
When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is the gamma benchmark of positive polarity
Voltage, increases the voltage of the output signal；
When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is the gamma benchmark of negative polarity
Voltage, reduces the voltage of the output signal.
Optionally, after the voltage of the output signal is increased, methods described also includes：
After the first period of time, the voltage of the output signal is recovered to the gamma reference voltage of the positive polarity；
After the voltage of the output signal is reduced, methods described also includes：
After the second period of time, the voltage of the output signal is recovered to the gamma reference voltage of the negative polarity；
Wherein, the first time period and the second time period are respectively less than the polarity control signal within each cycle
Keep the duration of any level.
Optionally, if the voltage of the output signal is the gamma reference voltage of positive polarity, the output signal is increased
Voltage, including：
The voltage of the output signal is increased into first object voltage by the gamma reference voltage GAM1 of the positive polarity
GAM11, the first object voltage GAM11 is met：
GAM11=GAM1+1/2 (AVDD-GAM1), wherein, AVDD is the reference voltage of gamma reference voltage.
Optionally, if the voltage of the output signal is the gamma reference voltage of negative polarity, the output signal is reduced
Voltage, including：
The voltage of the output signal is decreased to the second target voltage by the gamma reference voltage GAM2 of the negative polarity
GAM22, the second target voltage GAM22 is met：
GAM22=GAM2-1/2 (GND+GAM2), wherein, GND is ground voltage.
Second aspect includes there is provided a kind of source electrode drive circuit, the source electrode drive circuit：Detection module and output mould
Block；
The input of the detection module is connected with time schedule controller, and output end is connected with the output module, the inspection
Surveying module is used to detect whether the level for the polarity control signal that the time schedule controller is sent to occur saltus step；
The output module is used for：When saltus step occurs for the level of the polarity control signal, if the voltage of output signal
For the gamma reference voltage of positive polarity, increase the voltage of the output signal；When the level of the polarity control signal is jumped
During change, if the voltage of output signal is the gamma reference voltage of negative polarity, reduce the voltage of the output signal.
Optionally, the detection module, including：At least one gate；The output module, including：Control submodule,
First output sub-module and the second output sub-module；
At least one described gate is used for when saltus step occurs for the level of the polarity control signal, to control
Indication signal of the module output in the first level, and when saltus step does not occur for the level of the polarity control signal, to institute
State indication signal of the control submodule output in second electrical level；
The control submodule, for when the indication signal is second electrical level, starting first output sub-module,
The voltage of the output signal of the first output sub-module output is gamma reference voltage；
The control submodule, is additionally operable to, when the indication signal is the first level, start the second output submodule
Block, second output sub-module is used to, when the voltage of output signal is the gamma reference voltage of positive polarity, increase described defeated
Go out the voltage of signal；And when the voltage of the output signal is the gamma reference voltage of negative polarity, reduce the output letter
Number voltage.
Optionally, at least one described gate, including：OR gate, NAND gate, first and door and second and door；
Two inputs of the OR gate and two inputs of the NAND gate are connected with the time schedule controller respectively；
Wherein, the first input end of the OR gate is used for receiving polarity control signal, and the second input is used to receive described
The postpones signal of polarity control signal, the output end of the OR gate is connected with described first with the first input end of door；
The first input end of the NAND gate is used to receive the polarity control signal, and the second input is used to receive described
The postpones signal of polarity control signal, the output end of the NAND gate is connected with described first with the second input of door；
Described first is connected with the output end of door with described second with the first input end of door, and described second and the second of door
Input is connected with datum, and described second is connected with the output end of door with the control submodule, and the datum is
First level.
Optionally, if the voltage of the output signal is the gamma reference voltage of positive polarity, the output signal is increased
Voltage, including：
The voltage of the output signal is increased into first object voltage by the gamma reference voltage GAM1 of the positive polarity
GAM11, the first object voltage GAM11 is met：
GAM11=GAM1+1/2 (AVDD-GAM1), wherein, AVDD is the reference voltage of gamma reference voltage.
Optionally, if the voltage of the output signal is the gamma reference voltage of negative polarity, the output signal is reduced
Voltage, including：
The voltage of the output signal is decreased to the second target voltage by the gamma reference voltage GAM2 of the negative polarity
GAM22, the second target voltage GAM22 is met：
GAM22=GAM2-1/2 (GND+GAM2), wherein, GND is ground voltage.
The third aspect includes there is provided a kind of display device, the display device：Source drive as described in second aspect
Circuit.
The beneficial effect that the technical scheme that the present invention is provided is brought is：
The invention provides a kind of source electrode drive circuit and its voltage control method of output signal, display device, in inspection
When measuring the level saltus step of polarity control signal, source electrode drive circuit starts to fill each pixel cell in display panel
Electricity, if now the polarity of voltage of output signal is just, source electrode drive circuit can increase the voltage of output signal, so as to
The efficiency of charging is improved, reduces charging duration；If now the polarity of voltage of output signal is negative, source electrode drive circuit can reduce
The voltage of output signal, so as to improve the absolute value of the output signal voltage, and then can also improve the efficiency of charging, reduce
Charge duration.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structural representation of display device provided in an embodiment of the present invention；
Fig. 2 is a kind of voltage control method flow of the output signal of source electrode drive circuit provided in an embodiment of the present invention
Figure；
Fig. 3 is the corresponding relation signal between a kind of control signal provided in an embodiment of the present invention and the voltage of output signal
Figure；
Fig. 4 is a kind of polarity control signal provided in an embodiment of the present invention and the timing diagram of output signal；
Fig. 5 is a kind of structural representation of source electrode drive circuit provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of detection module provided in an embodiment of the present invention；
Fig. 7 is pair between the voltage of a kind of control signal provided in an embodiment of the present invention, indication signal and output signal
Answer relation schematic diagram.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of structural representation of display device provided in an embodiment of the present invention, from figure 1 it appears that display
Device can typically include display panel 10, time schedule controller 20, gate driving circuit 30 and source electrode drive circuit 40.When wherein
Sequence controller 20 is connected with gate driving circuit 30 and source electrode drive circuit 40 respectively, for controlling the He of gate driving circuit 30
The working condition of source electrode drive circuit 40.Gate driving circuit 30 connects with every one-row pixels unit in display panel 10 respectively
Connect, for being progressively scanned to the multirow pixel cell in display panel 10.Source electrode drive circuit 40 respectively with display panel
Each row pixel cell connection, for multiple row pixel cell export analog signal, to be filled to the multiple row pixel cell
Electricity.
Specifically, time schedule controller 20 can be to the output polarity control signal of source electrode drive circuit 40, source electrode drive circuit
40 according to the height of the level of the polarity control signal, can adjust the polarity of the analog signal exported to display panel 10, with
Realize and the frame of display panel 10 is driven reverse.It that is to say, when saltus step occurs for the level of polarity control signal, source drive electricity
Saltus step can also occur for the polarity for the analog signal that road 40 is exported.
Fig. 2 is a kind of flow of the voltage control method of the output signal of source electrode drive circuit provided in an embodiment of the present invention
Figure, this method can apply in the source electrode drive circuit 40 shown in Fig. 1, with reference to Fig. 2, and this method can specifically include：
Whether the level for the polarity control signal that step 101, detection time schedule controller are sent occurs saltus step.
When saltus step occurs for the level that source electrode drive circuit detects the polarity control signal, step 102 can be performed；When
When saltus step does not occur for the level for detecting the polarity control signal, step 101 can be continued executing with, that is, continues to believe Polarity Control
Number level detected.
Step 102, the polarity of voltage for detecting output signal.
When saltus step occurs for the level that source electrode drive circuit detects polarity control signal, it may be determined that gate driving circuit
Start the scanning to the new frame of display panel progress.In order to improve the charge efficiency of source electrode drive circuit output signal, Ke Yixian
Detect the polarity of voltage of current output signal.
In embodiments of the present invention, the voltage of the output signal of source electrode drive circuit output is exported according to time schedule controller
Control signal and the gamma reference voltage that determines.Specifically, multiple different electricity can be provided with source electrode drive circuit in advance
The gamma reference voltage of pressure value, time schedule controller can be before each frame scan to source electrode drive circuit output control signal, source
Pole drive circuit can select the voltage as output signal according to the control signal from multiple gamma reference voltages.
Example, it is assumed that as shown in figure 3, being provided with the gamma benchmark of 8 different magnitudes of voltage in source electrode drive circuit in advance
Voltage：Gam1 to gam8, wherein gam1 are positive polarity voltage to gam4, and gam5 to gam8 is reverse voltage.Time schedule controller
Three control bits can be included in the control signal of output：D1, D2 and D3, wherein the value of each control bit can for 0 or
1.Source electrode drive circuit can determine a voltage conduct according to the value of three control bits from 8 gamma reference voltages
The voltage of output signal.For example in Fig. 3, when control bit D3 takes 0, control is worked as in gam1 to gam4 conductings, gam5 to gam8 shut-offs
When position D3 takes 1, gam1 to gam4 shut-offs, gam5 to gam8 shut-off conductings；When control bit D2 takes 0, gam1, gam2, gam5 and
Gam6 is turned on, gam3 and gam4, and gam7 and gam8 shut-offs；When control bit D1 takes 0, gam1, gam3, gam5 and gam7 are led
It is logical, gam2 and gam4, and gam6 and gam8 shut-offs.Therefore, by controlling the values of three control bits, it is ensured that only
One gamma reference voltage is strobed.In the example depicted in fig. 3, three control bits in the control signal of time schedule controller output
D1, D2 and D3 are 0, therefore gam1 is gated, and the voltage OUT of the output signal of now source electrode drive circuit output is positive polarity
Gamma reference voltage gam1.
If the voltage of step 103, output signal is the gamma reference voltage of positive polarity, increase the voltage of the output signal.
Perform step 105.
When the gamma reference voltage that the voltage of output signal is positive polarity, in order to improve the efficiency of charging, when reducing charging
It is long, the voltage of the output signal by the gamma reference voltage GAM1 of the positive polarity can be increased to first object voltage GAM11.
First object voltage GAM11 can be met：
GAM11=GAM1+1/2 (AVDD-GAM1), wherein, AVDD is the reference voltage of gamma reference voltage.The source electrode drives
The gamma reference voltage for the multiple different magnitudes of voltage being pre-configured with dynamic circuit is to be calculated to obtain according to reference voltage AVDD
, reference voltage AVDD is more than any gamma reference voltage.
Example, it is assumed that at the t1 moment, polarity control signal POL (t) is by negative level saltus step to positive level
(i.e. polarity control signal be rising edge), and output signal OUT polarity of voltage be positive polarity gamma electric voltage GAM1, then source electrode
Its magnitude of voltage by GAM1 can be increased to first object voltage GAM11 by drive circuit.
If the voltage of step 104, output signal is the gamma reference voltage of negative polarity, reduce the voltage of the output signal.
Perform step 106.
When the gamma reference voltage that the voltage of output signal is negative polarity, in order to improve the efficiency of charging, when reducing charging
It is long, the voltage of the output signal by the gamma reference voltage GAM2 of the negative polarity can be decreased to the second target voltage GAM22.
Due to when the polarity of voltage of output signal is bears, reducing magnitude of voltage and that is to say the absolute value for improving the voltage, so as to carry
The efficiency of high charge, reduces charging duration.
In embodiments of the present invention, the second target voltage GAM22 after the adjustment can be met：
GAM22=GAM2-1/2 (GND+GAM2), wherein, GND is ground voltage, and such as GND magnitude of voltage can be 0.
Example, it is assumed that at the t2 moment, polarity control signal POL (t) is by positive level saltus step to negative level
(i.e. polarity control signal be trailing edge), and output signal OUT polarity of voltage be negative polarity gamma electric voltage GAM2, then source electrode
Its magnitude of voltage by GAM2 can be decreased to the second target voltage GAM22 by drive circuit.
Step 105, after the first period of time, the voltage of the output signal is recovered to the gamma benchmark electricity of the positive polarity
Pressure.
In embodiments of the present invention, with reference to Fig. 1 as can be seen that in the scanning process of each frame, gate driving circuit 30
Usually since one end away from source electrode drive circuit 40, along direction (such as X in Fig. 1 close to source electrode drive circuit 40
Direction) display panel 10 is scanned.It that is to say, source electrode drive circuit 40, can be first right during each frame scan
The pixel cell of distal end is charged.The impedance of circuit is larger during due to being charged to distal end pixel cell, therefore can first improve
The absolute value of charging voltage.After by first time period, when near-end pixel cell is arrived in the scanning of gate driving circuit 30, by
Impedance when being charged to near-end pixel cell is smaller, therefore can recover the voltage of output signal to original positive polarity
Gamma reference voltage, to reduce driving power consumption.
Example, as shown in figure 4, the voltage of output signal is increased to first object voltage GAM11 by source electrode drive circuit
Afterwards, after by first time period t1', you can its voltage is recovered to the gamma reference voltage GAM1 of original positive polarity.
Step 106, after the second period of time, the voltage of the output signal is recovered to the gamma benchmark electricity of the negative polarity
Pressure.
Accordingly, in order to reduce power consumption, the voltage of output signal is being adjusted to the second target voltage by source electrode drive circuit
After second time period afterwards, you can restore it into the gamma reference voltage of former negative polarity.
Example, as shown in figure 4, the voltage of output signal is decreased to the second target voltage GAM22 by source electrode drive circuit
Afterwards, after by second time period t2', you can by the gamma reference voltage GAM2 of its voltage returns to original negative polarity.
It should be noted that it can also be seen that the first time period and the second time period are respectively less than the polarity from Fig. 4
Control signal keeps the duration of any level within each cycle.Because polarity control signal POL (t) level is jumped every a frame
Become once, it keeps the duration of low level and high level to be equal, is the duration of a frame, therefore in the embodiment of the present invention
In, the first time period and second time period can be with equal.
It should also be noted that, because in actual applications, gate driving circuit 30 can also be from close to source drive electricity
The one end on road 40 starts to be scanned display panel 10 (such as X opposite direction is scanned along along Fig. 1).For raster data model
Circuit 30 proximally to the situation of far end scan, source electrode drive circuit 40 can occur in the level of polarity control signal saltus step it
After start timing, when by preset time period, (preset time period should be less than polarity control signal and be maintained within each cycle times
The duration of one level) after, because the pixel cell of distal end has been arrived in the scanning of gate driving circuit 30, now to the pixel of the distal end
Impedance when unit charges is larger, if therefore the polarity of voltage of output signal is positive polarity, source electrode drive circuit 40 can increase
The voltage of the output signal；If the polarity of voltage of output signal is negative polarity, source electrode drive circuit 40 can reduce the output
The voltage of signal, so as to effectively improve the efficiency of charging.When again saltus step occurs for the level of polarity control signal, source electrode
Drive circuit 40 can recover the voltage of output signal and restart timing.
It should be noted that the voltage control method of the output signal of source electrode drive circuit provided in an embodiment of the present invention
The sequencing of step can be adjusted suitably.Any one skilled in the art the invention discloses technology
In the range of, the method that can readily occur in change should be all included within the scope of the present invention, therefore repeat no more.
In summary, the embodiments of the invention provide a kind of voltage control method of the output signal of source electrode drive circuit,
In the level saltus step of polarity control signal, source electrode drive circuit starts to charge to each pixel cell in display panel,
If now the polarity of voltage of output signal is just, source electrode drive circuit can increase the voltage of output signal, so as to carry
The efficiency of high charge, reduces charging duration；If now the polarity of voltage of output signal is negative, source electrode drive circuit can reduce defeated
Go out the voltage of signal, so as to improve the absolute value of the output signal voltage, improve the efficiency of charging, reduce charging duration.
Fig. 5 is a kind of structural representation of source electrode drive circuit provided in an embodiment of the present invention, and with reference to Fig. 5, the source electrode drives
Dynamic circuit 40 can include：Detection module 401 and output module 402.
The input of the detection module 401 is connected with time schedule controller 20, and output end is connected with the output module 402, should
Detection module 401 is used to detect whether the level for the polarity control signal that the time schedule controller 20 is sent to occur saltus step.
The output module 402 is used for：When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is
The gamma reference voltage of positive polarity, increases the voltage of the output signal；When saltus step occurs for the level of the polarity control signal, if
The voltage of output signal is the gamma reference voltage of negative polarity, reduces the voltage of the output signal.
With continued reference to Fig. 5, the detection module 401 can include at least one gate (not shown in Fig. 5)；The output mould
Block 402 can include：Control submodule 4021, the first output sub-module 4022 and the second output sub-module 4023.
At least one gate is used for when saltus step occurs for the level of the polarity control signal, to the control submodule
4021 indication signals of the output in the first level, and when saltus step does not occur for the level of the polarity control signal, to the control
Indication signal of the output of system module 4021 in second electrical level.Wherein, first level can be relative to the second electrical level
High level.
The control submodule 4021, for when the indication signal is second electrical level, starting first output sub-module
4022, the voltage of the output signal of first output sub-module 4022 output is gamma reference voltage.
The control submodule 4021, is additionally operable to, when the indication signal is the first level, start second output sub-module
4023, second output sub-module 4023 is used for when the voltage of output signal is the gamma reference voltage of positive polarity, and increase should
The voltage of output signal；And when the voltage of the output signal is the gamma reference voltage of negative polarity, reduce the output signal
Voltage.
Specifically, when the voltage of output signal is the gamma reference voltage of positive polarity, the second output sub-module 4023 can
So that the voltage of the output signal is increased into first object voltage GAM11 by the gamma reference voltage GAM1 of the positive polarity, this
One target voltage GAM11 can be met：
GAM11=GAM1+1/2 (AVDD-GAM1), wherein, AVDD is the reference voltage of gamma reference voltage.
When the voltage of output signal is the gamma reference voltage of negative polarity, the second output sub-module 4023 can be defeated by this
The voltage for going out signal is decreased to the second target voltage GAM22 by the gamma reference voltage GAM2 of the negative polarity, second target electricity
Pressure GAM22 can be met：
GAM22=GAM2-1/2 (GND+GAM2), wherein, GND is ground voltage.
Fig. 6 is a kind of structural representation of detection module provided in an embodiment of the present invention, with reference to Fig. 6, the detection module 401
In at least one gate can include：OR gate R1, NAND gate R2, first and door R3 and second and door R4.
OR gate R1 two inputs and NAND gate R2 two inputs A and B are connected with time schedule controller respectively.
Wherein, OR gate R1 first input end A is used for receiving polarity control signal POL (t), and the second input B is used for
Receive the postpones signal POL (t-1) of the polarity control signal, OR gate R1 output end and the first input of the first and door R3
End connection.
NAND gate R2 first input end A is used to receive the polarity control signal POL (t), and the second input B is used to connect
Receive the postpones signal POL (t-1) of the polarity control signal, NAND gate R2 output end and the second input of the first and door R3
End connection.
In embodiments of the present invention, latch, the delay letter of the polarity control signal can be provided with time schedule controller
Number POL (t-1) can be defeated after time schedule controller is latched by the latch to the polarity control signal POL (t) of output
Go out.
This first second is connected with door R3 output end with this with door R4 first input end, and this second and the second of door R4
Input C is connected with datum, and this second is connected with door R4 output end O with control submodule 4021, for the control
The output indication signal of submodule 4021.
From fig. 6 it can be seen that the detection module 401 can include altogether three inputs：A, B and C, wherein input
The datum of C connections can be the first level.Three inputs and output end O truth table can be as shown in table 1：
Table 1
| A | B | C | O |
| 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 |
| 0 | 1 | 0 | 0 |
| 0 | 1 | 1 | 1 |
| 1 | 0 | 0 | 0 |
| 1 | 0 | 1 | 1 |
| 1 | 1 | 0 | 0 |
| 1 | 1 | 1 | 0 |
0 in table 1 represents low level, and 1 represents high level.From table 1 it follows that as input A and input B electricity
It is flat on the contrary, and the datum of input C connections when being high level, output end O exports high level.It that is to say, work as Polarity Control
During the level of signal (i.e. the level saltus step of polarity control signal) opposite with the level of its postpones signal, detection module 401 can be with
Indication signal of the output in the first level；Otherwise, indication signal of the output of detection module 401 in second electrical level.
Example, with reference to Fig. 4, at the t1 moment, polarity control signal POL (t) is high level, and the polarity control signal prolongs
Slow signal POL (t-1) is low level, both level on the contrary, and output signal voltage be positive polarity gamma reference voltage
GAM1, therefore source electrode drive circuit can further increase the voltage of the output signal；At t2 moment, polarity control signal POL
(t) it is low level, the postpones signal POL (t-1) of the polarity control signal is high level, both level are on the contrary, and output letter
Number voltage be negative polarity gamma reference voltage GAM2, therefore source electrode drive circuit can further reduce the output signal
Voltage.
Fig. 7 is pair between the voltage of a kind of control signal provided in an embodiment of the present invention, indication signal and output signal
Answer relation schematic diagram.In embodiments of the present invention, offset voltage output end V' can also be provided with source electrode drive circuit in advance,
The offset voltage output end V' is when the voltage of output signal is the gamma reference voltage GAM1 of positive polarity, the offset voltage of output
V' can be positive voltage, and such as offset voltage V' can be met：V'=1/2 (AVDD-GAM1)；It is in the voltage of output signal
During the gamma reference voltage GAM2 of negative polarity, the offset voltage V' of output can be negative voltage, for example, can meet：V'=-1/2
(GND+GAM2)。
It can be seen from figure 7 that when the output end O of detection module 401 indication signals exported are that (i.e. O is the first level
1) when, offset voltage output end V' is strobed, the output signal OUT of source electrode drive circuit voltage for gamma reference voltage with
Offset voltage V' sums.For example in Fig. 7, the gamma reference voltage of output signal is gam1, then the output signal OUT's after adjusting
Voltage can be：Gam1+V'=gam1+1/2 (AVDD-gam1).
When the output end O of detection module 401 indication signals exported are second electrical level (i.e. O is 0), the offset voltage is defeated
Go out to hold V' to be turned off, the output signal OUT of source electrode drive circuit voltage is gamma reference voltage.
In summary, the embodiments of the invention provide a kind of source electrode drive circuit, in the level saltus step of polarity control signal
When, the source electrode drive circuit starts to charge to each pixel cell in display panel, if the now voltage of output signal
Polarity is just, source electrode drive circuit can increase the voltage of output signal, so as to improve the efficiency of charging, when reducing charging
It is long；If now the polarity of voltage of output signal is negative, source electrode drive circuit can reduce the voltage of output signal, so as to carry
The absolute value of the high output signal voltage, improves the efficiency of charging, reduces charging duration.
With reference to Fig. 1, the embodiments of the invention provide a kind of display device, the display device can include as shown in Figure 5
Source electrode drive circuit, the source electrode drive circuit can include detection module as shown in Figure 6.The display device can be：Liquid crystal
Panel, Electronic Paper, oled panel, AMOLED panel, mobile phone, tablet personal computer, television set, display, notebook computer, digital phase
Any product or part with display function such as frame, navigator.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the circuit of foregoing description
With the specific work process of each module, the corresponding process in preceding method embodiment is may be referred to, be will not be repeated here.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of voltage control method of the output signal of source electrode drive circuit, it is characterised in that applied to source electrode drive circuit,
Methods described includes：
Whether the level for the polarity control signal that detection time schedule controller is sent occurs saltus step；
When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is the gamma benchmark electricity of positive polarity
Pressure, increases the voltage of the output signal；
When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is the gamma benchmark electricity of negative polarity
Pressure, reduces the voltage of the output signal.
2. according to the method described in claim 1, it is characterised in that after the voltage of the output signal is increased, the side
Method also includes：
After the first period of time, the voltage of the output signal is recovered to the gamma reference voltage of the positive polarity；
After the voltage of the output signal is reduced, methods described also includes：
After the second period of time, the voltage of the output signal is recovered to the gamma reference voltage of the negative polarity；
Wherein, the first time period and the second time period are respectively less than the polarity control signal and kept within each cycle
The duration of any level.
3. method according to claim 1 or 2, it is characterised in that if the voltage of the output signal is the gal of positive polarity
Horse reference voltage, increases the voltage of the output signal, including：
The voltage of the output signal is increased into first object voltage by the gamma reference voltage GAM1 of the positive polarity
GAM11, the first object voltage GAM11 is met：
GAM11=GAM1+1/2 (AVDD-GAM1), wherein, AVDD is the reference voltage of gamma reference voltage.
4. method according to claim 1 or 2, it is characterised in that if the voltage of the output signal is the gal of negative polarity
Horse reference voltage, reduces the voltage of the output signal, including：
The voltage of the output signal is decreased to the second target voltage by the gamma reference voltage GAM2 of the negative polarity
GAM22, the second target voltage GAM22 is met：
GAM22=GAM2-1/2 (GND+GAM2), wherein, GND is ground voltage.
5. a kind of source electrode drive circuit, it is characterised in that the source electrode drive circuit includes：Detection module and output module；
The input of the detection module is connected with time schedule controller, and output end is connected with the output module, the detection mould
Block is used to detect whether the level for the polarity control signal that the time schedule controller is sent to occur saltus step；
The output module is used for：When saltus step occurs for the level of the polarity control signal, if the voltage of output signal is just
The gamma reference voltage of polarity, increases the voltage of the output signal；When saltus step occurs for the level of the polarity control signal,
If the voltage of output signal is the gamma reference voltage of negative polarity, reduce the voltage of the output signal.
6. source electrode drive circuit according to claim 5, it is characterised in that the detection module, including：At least one is patrolled
Collect door；The output module, including：Control submodule, the first output sub-module and the second output sub-module；
At least one described gate is used for when saltus step occurs for the level of the polarity control signal, to the control submodule
Indication signal of the output in the first level, and when saltus step does not occur for the level of the polarity control signal, to the control
Indication signal of the system module output in second electrical level；
The control submodule, it is described for when the indication signal is second electrical level, starting first output sub-module
The voltage of the output signal of first output sub-module output is gamma reference voltage；
The control submodule, is additionally operable to, when the indication signal is the first level, start second output sub-module, institute
Stating the second output sub-module is used to, when the voltage of output signal is the gamma reference voltage of positive polarity, increase the output signal
Voltage；And when the voltage of the output signal is the gamma reference voltage of negative polarity, reduce the electricity of the output signal
Pressure.
7. source electrode drive circuit according to claim 6, it is characterised in that at least one described gate, including：Or
Door, NAND gate, first and door and second and door；
Two inputs of the OR gate and two inputs of the NAND gate are connected with the time schedule controller respectively；
Wherein, the first input end of the OR gate is used for receiving polarity control signal, and the second input is used to receive the polarity
The postpones signal of control signal, the output end of the OR gate is connected with described first with the first input end of door；
The first input end of the NAND gate is used to receive the polarity control signal, and the second input is used to receive the polarity
The postpones signal of control signal, the output end of the NAND gate is connected with described first with the second input of door；
Described first is connected with the output end of door with described second with the first input end of door, and described second inputs with the second of door
End is connected with datum, and described second is connected with the output end of door with the control submodule, and the datum is first
Level.
8. according to any described source electrode drive circuit of claim 5 to 7, it is characterised in that if the voltage of the output signal
For the gamma reference voltage of positive polarity, increase the voltage of the output signal, including：
The voltage of the output signal is increased into first object voltage by the gamma reference voltage GAM1 of the positive polarity
GAM11, the first object voltage GAM11 is met：
GAM11=GAM1+1/2 (AVDD-GAM1), wherein, AVDD is the reference voltage of gamma reference voltage.
9. according to any described source electrode drive circuit of claim 5 to 7, it is characterised in that if the voltage of the output signal
For the gamma reference voltage of negative polarity, reduce the voltage of the output signal, including：
The voltage of the output signal is decreased to the second target voltage by the gamma reference voltage GAM2 of the negative polarity
GAM22, the second target voltage GAM22 is met：
GAM22=GAM2-1/2 (GND+GAM2), wherein, GND is ground voltage.
10. a kind of display device, it is characterised in that the display device includes：Source electrode as described in claim 5 to 9 is any
Drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710537782.6A CN107134248B (en) | 2017-07-04 | 2017-07-04 | Source electrode driving circuit, voltage control method of output signal of source electrode driving circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710537782.6A CN107134248B (en) | 2017-07-04 | 2017-07-04 | Source electrode driving circuit, voltage control method of output signal of source electrode driving circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107134248A true CN107134248A (en) | 2017-09-05 |
| CN107134248B CN107134248B (en) | 2020-11-06 |
Family
ID=59736791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710537782.6A Expired - Fee Related CN107134248B (en) | 2017-07-04 | 2017-07-04 | Source electrode driving circuit, voltage control method of output signal of source electrode driving circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107134248B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114495794A (en) * | 2022-02-18 | 2022-05-13 | 京东方科技集团股份有限公司 | Display panel and display device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619635A (en) * | 2003-11-21 | 2005-05-25 | 夏普株式会社 | Liquid crystal display device, driving circuit for the same and driving method for the same |
| CN1727964A (en) * | 2004-07-27 | 2006-02-01 | 三星电子株式会社 | Array substrate and have the display device of this array substrate, and drive unit and driving method |
| CN1808551A (en) * | 2005-01-20 | 2006-07-26 | 联咏科技股份有限公司 | Grayscale brightness compensation method and its apparatus |
| KR20080048267A (en) * | 2006-11-28 | 2008-06-02 | 엘지디스플레이 주식회사 | Driving liquid crystal display and apparatus for driving the same |
| US20090002301A1 (en) * | 2007-06-28 | 2009-01-01 | Lg.Philips Lcd Co., Ltd. | Liquid crystal display and driving method thereof |
| CN101635133A (en) * | 2008-07-21 | 2010-01-27 | 奇美电子股份有限公司 | Liquid crystal display device and pixel driving method |
| CN101877212A (en) * | 2009-04-30 | 2010-11-03 | 乐金显示有限公司 | Liquid crystal display device and method of driving the same |
| CN101996593A (en) * | 2009-08-24 | 2011-03-30 | 华映视讯（吴江）有限公司 | Driving device and method of thin film transistor liquid crystal display |
| CN102024438A (en) * | 2010-12-24 | 2011-04-20 | 北京京东方光电科技有限公司 | Liquid crystal display source electrode driving device and driving method thereof |
| US20160005367A1 (en) * | 2014-07-04 | 2016-01-07 | Samsung Display Co., Ltd. | Display apparatus and method of driving the display apparatus |
| CN105761679A (en) * | 2014-12-30 | 2016-07-13 | 乐金显示有限公司 | Controller, Organic Light-emitting Display Panel, Organic Light-emitting Display Device, And Method Of Driving The Same |
| CN106297644A (en) * | 2016-11-04 | 2017-01-04 | 京东方科技集团股份有限公司 | The drive circuit of a kind of display floater, its driving method and display device |
-
2017
- 2017-07-04 CN CN201710537782.6A patent/CN107134248B/en not_active Expired - Fee Related
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619635A (en) * | 2003-11-21 | 2005-05-25 | 夏普株式会社 | Liquid crystal display device, driving circuit for the same and driving method for the same |
| CN1727964A (en) * | 2004-07-27 | 2006-02-01 | 三星电子株式会社 | Array substrate and have the display device of this array substrate, and drive unit and driving method |
| CN1808551A (en) * | 2005-01-20 | 2006-07-26 | 联咏科技股份有限公司 | Grayscale brightness compensation method and its apparatus |
| KR20080048267A (en) * | 2006-11-28 | 2008-06-02 | 엘지디스플레이 주식회사 | Driving liquid crystal display and apparatus for driving the same |
| US20090002301A1 (en) * | 2007-06-28 | 2009-01-01 | Lg.Philips Lcd Co., Ltd. | Liquid crystal display and driving method thereof |
| CN101635133A (en) * | 2008-07-21 | 2010-01-27 | 奇美电子股份有限公司 | Liquid crystal display device and pixel driving method |
| CN101877212A (en) * | 2009-04-30 | 2010-11-03 | 乐金显示有限公司 | Liquid crystal display device and method of driving the same |
| CN101996593A (en) * | 2009-08-24 | 2011-03-30 | 华映视讯（吴江）有限公司 | Driving device and method of thin film transistor liquid crystal display |
| CN102024438A (en) * | 2010-12-24 | 2011-04-20 | 北京京东方光电科技有限公司 | Liquid crystal display source electrode driving device and driving method thereof |
| US20160005367A1 (en) * | 2014-07-04 | 2016-01-07 | Samsung Display Co., Ltd. | Display apparatus and method of driving the display apparatus |
| CN105761679A (en) * | 2014-12-30 | 2016-07-13 | 乐金显示有限公司 | Controller, Organic Light-emitting Display Panel, Organic Light-emitting Display Device, And Method Of Driving The Same |
| CN106297644A (en) * | 2016-11-04 | 2017-01-04 | 京东方科技集团股份有限公司 | The drive circuit of a kind of display floater, its driving method and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114495794A (en) * | 2022-02-18 | 2022-05-13 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114495794B (en) * | 2022-02-18 | 2023-12-26 | 京东方科技集团股份有限公司 | Display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107134248B (en) | 2020-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105161047B (en) | A kind of display drive method of display panel, display driver circuit and display device | |
| CN102945660B (en) | Display device and grid signal generation method thereof | |
| CN106558289B (en) | Liquid crystal display device and discharge control method | |
| CN104269148B (en) | liquid crystal driving circuit, liquid crystal driving method and liquid crystal display device | |
| US20130120349A1 (en) | Display device and method for driving the same | |
| CN102842299A (en) | Liquid crystal display device and method and apparatus for driving liquid crystal display device | |
| CN105589235B (en) | Driving method for liquid crystal display panel | |
| CN106023931A (en) | LCD screen and energy-saving control method thereof | |
| CN104766582A (en) | Regulating system, regulating method thereof and display device | |
| US20130050172A1 (en) | Display apparatus and pixel voltage driving method thereof | |
| CN102789771A (en) | Polarity-reversal signal converting method and device and display | |
| CN102881254B (en) | Driving system and driving method for improving picture quality | |
| CN106531114A (en) | Display driving method and display driving system | |
| CN106409260A (en) | Voltage compensation circuit and voltage compensation method thereof, display panel, and display apparatus | |
| CN104240661A (en) | Polarity inversion driving method, polarity inversion driving device and display device | |
| CN102314010B (en) | Liquid crystal display panel and voltage control method thereof | |
| CN106875880A (en) | A kind of common electric voltage compensation circuit, compensation method and display device | |
| CN103424907A (en) | Liquid crystal display, liquid crystal pixel drive circuit and device and control method and device | |
| CN101800036A (en) | Method for driving liquid crystal display and related driving device thereof | |
| CN103377613B (en) | Display device and display method thereof | |
| CN100559449C (en) | The method of the liquid crystal indicator of dynamic switch drive mode and reduction power consumption | |
| CN107134248A (en) | Source electrode drive circuit and its voltage control method of output signal, display device | |
| US9536491B2 (en) | Liquid-crystal display device | |
| CN104332145A (en) | Liquid crystal panel and driving method thereof as well as liquid crystal display | |
| CN208737870U (en) | A kind of pixel-driving circuit, display panel 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |