CN105702195B - Common electrode voltage compensation circuit, method, display control circuit and display device - Google Patents
Common electrode voltage compensation circuit, method, display control circuit and display device Download PDFInfo
- Publication number
- CN105702195B CN105702195B CN201610274307.XA CN201610274307A CN105702195B CN 105702195 B CN105702195 B CN 105702195B CN 201610274307 A CN201610274307 A CN 201610274307A CN 105702195 B CN105702195 B CN 105702195B
- Authority
- CN
- China
- Prior art keywords
- signal
- compensating
- compensation
- switch
- operational amplifier
- 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.)
- Active
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
- G09G3/2007—Display of intermediate tones
- G09G3/2077—Display of intermediate tones by a combination of two or more gradation control methods
-
- 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
- G09G2310/0264—Details of driving circuits
- G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
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)
- Liquid Crystal Display Device Control (AREA)
Abstract
The present invention provides a kind of common electrode voltage compensation circuit, method, display control circuit and display devices.The common electrode voltage compensation circuit includes: detection unit, for when according to detection of data signal to after the first predetermined time on a display panel by the picture for showing preassigned pattern when, export corresponding with the preassigned pattern the first compensating control signal；And compensating unit, it is used for according to first compensating control signal in the first predetermined time post-compensation public electrode voltages.Whether the present invention will show the picture of preassigned pattern by using detection unit on a display panel according to detection of data signal, corresponding first compensating control signal is then exported to compensating unit, compensating unit accordingly compensates public electrode voltages after the first predetermined time according to first compensating control signal, to realize the precompensation of the big ups and downs to public electrode voltages under special frame mode, the crosstalk phenomenon under special frame is eliminated.
Description
Technical field
The present invention relates to common electrode voltage compensation technical field more particularly to a kind of common electrode voltage compensation circuit,
Method, display control circuit and display device.
Background technique
In High Frequency Streaking and Ringing (the vertical striped of high frequency) picture or High-
Under the pictures of special patterns such as Contrast Streaking (high contrast striped) picture, public electrode voltages are by coupling influence
Big ups and downs can be generated, on the display screen on can show very strong crosstalk (crosstalk) phenomenon.Due to certain special
Under picture, public electrode voltages fluctuation acutely, is difficult to realize common electrode voltage compensation by existing feed circuit.
Existing common electrode voltage compensation circuit is by by the predetermined point on the public electrode wire on display panel
Public electrode voltages feed back to the negative-phase input of operational amplifier by feedback resistance, and by the output end of operational amplifier with
Public electrode wire connection, to realize the compensation to public electrode voltages.However existing common electrode voltage compensation circuit is first
It detects the public electrode voltages on the public electrode wire of display panel then to compensate again, is the common electrical on public electrode wire
Pole tension has already appeared to have fluctuated and compensate later further according to the fluctuation situation detected, will lead to the picture in preassigned pattern
(it will lead to the picture of public electrode voltages big ups and downs) under face and cannot eliminate by pre-compensating for the crosstalk under special frame
Phenomenon.
Summary of the invention
The main purpose of the present invention is to provide a kind of common electrode voltage compensation circuit, method, display control circuit and
Display device, it is public on the public electrode wire for first detect display panel for solving existing common electrode voltage compensation circuit
Then electrode voltage compensates again, be public electrode voltages on public electrode wire have already appeared fluctuated after further according to inspection
The fluctuation situation measured compensates, so as to cause (it is violent to will lead to public electrode voltages under the picture of preassigned pattern
The picture of fluctuation) the problem of crosstalk phenomenon under special frame cannot be eliminated by pre-compensating for.
In order to achieve the above object, the present invention provides a kind of common electrode voltage compensation circuits, comprising:
Detection unit, it is pre- for that will be shown on a display panel after according to detection of data signal in the first predetermined time
When the picture of mould-fixed, the first compensating control signal corresponding with the preassigned pattern is exported；And
Compensating unit, for electric in the first predetermined time post-compensation public electrode according to first compensating control signal
Pressure.
When implementation, first compensating control signal includes first switch signal and compensation voltage signal；
The compensating unit includes compensated operational amplifier, control module, D/A converter module, first switch module, anti-
Feed resistance and input resistance, wherein
The control module is connect with the detection unit, for being controlled according to first predetermined time and first compensation
Signal output first switch signal processed and digital compensation voltage signal；
The D/A converter module is connect with the control module, for converting the digital compensation voltage signal to mould
Quasi- compensation voltage signal；
The first switch module, connect with the control module, for pre- second according to the first switch signal
The reverse phase that the analog compensation voltage signal accesses the compensated operational amplifier by the input resistance is controlled after fixing time
Input terminal；
The normal phase input end of the compensated operational amplifier accesses predetermined direct current voltage, the compensated operational amplifier it is anti-
The feedback resistance, the compensated operational amplifier are connected between phase input terminal and the output end of the compensated operational amplifier
Output end and display panel on public electrode wire connection；First predetermined time is equal to second predetermined time and institute
State the sum of the conversion time of compensated operational amplifier.
When implementation, the first switch module includes: first switch transistor, and grid accesses the first switch signal,
First pole is connect with the D/A converter module, and the second pole is anti-by the input resistance Ri and the compensated operational amplifier
The connection of phase input terminal.
When implementation, the detection unit is also used to when according to the detection of data signal to the picture that preassigned pattern is not present
When face, the second compensating control signal is exported；
The control module is also used to when receiving second compensating control signal, is controlled according to second compensation
Signal processed exports second switch signal；
The compensating unit further includes compensating electric capacity, feedback end and second switch module；
The feedback end is connect with the predetermined point on the public electrode wire on the display panel；
The first end of the compensating electric capacity is connect by the second switch module with the feedback end, the compensating electric capacity
Second end connect with the first end of the input resistance；The reverse phase of the second end of the input resistance and the operational amplifier
Input terminal connection；
The feedback end and the compensation is connected for controlling according to the second switch signal in the second switch module
Connection between the first end of capacitor.
When implementation, the second switch module includes: second switch transistor, and grid accesses the second switch signal,
First pole is connect with the feedback end, and the second pole is connect with the first end of the compensating electric capacity.
When implementation, the detection unit is set on the sequential control circuit that the display panel includes；
The control module is specifically used for determining that described first is pre- according to the initial signal that the sequential control circuit exports
It fixes time.
The present invention also provides a kind of common electrode voltage compensation methods, comprising:
Detecting step: when detection unit according to detection of data signal in the first predetermined time after will show on a display panel
When showing the picture of preassigned pattern, detection unit exports the first compensating control signal corresponding with the preassigned pattern；
Compensation process: compensating unit is according to first compensating control signal in the first predetermined time post-compensation common electrical
Pole tension.
When implementation, first compensating control signal includes first switch signal and compensation voltage signal；The compensation is single
Member includes compensated operational amplifier, control module, D/A converter module, first switch module, feedback resistance and input resistance；Institute
State compensated operational amplifier normal phase input end access predetermined direct current voltage, the output end of the compensated operational amplifier with it is public
Electrode wires connection；It is connected between the inverting input terminal of the compensated operational amplifier and the output end of the compensated operational amplifier
There is the feedback resistance；
The compensation process specifically includes:
The control module according to first predetermined time and first compensating control signal output first switch signal and
Digital compensation voltage signal；
The D/A converter module converts the digital compensation voltage signal to analog compensation voltage signal；
The first switch module controls the analog compensation according to the first switch signal after the second predetermined time
Voltage signal accesses the inverting input terminal of the compensated operational amplifier by the input resistance；
First predetermined time be equal to second predetermined time and the compensated operational amplifier conversion time it
With.
When implementation, the compensating unit further includes compensating electric capacity, feedback end and second switch module；
The feedback end is connect with the predetermined point on the public electrode wire on the display panel；
The first end of the compensating electric capacity is connect by the second switch module with the feedback end, the compensating electric capacity
Second end connect with the first end of the input resistance；The reverse phase of the second end of the input resistance and the operational amplifier
Input terminal connection；
The detecting step further include: when the detection unit according to the detection of data signal to be not present preassigned pattern
Picture when, the detection unit exports the second compensating control signal；
The compensation process further include:
When the control module receives second compensating control signal, the control module is mended according to described second
Repay control signal output second switch signal；
The second switch module controls according to the second switch signal and the feedback end and the compensating electric capacity is connected
Between connection.
When implementation, the detection unit is set on the sequential control circuit that the display panel includes；
The compensation process further include: the control module is determined according to the initial signal that the sequential control circuit exports
First predetermined time.
The present invention also provides a kind of display control circuits, including above-mentioned common electrode voltage compensation circuit.
When implementation, display control circuit of the present invention further includes sequential control circuit；
The detection unit that the common electrode voltage compensation circuit includes is set on the sequential control circuit；The control
Molding root tuber determined for the first predetermined time according to the initial signal that the sequential control circuit exports.
The present invention also provides a kind of display devices, including display panel and above-mentioned display control circuit；
The common electrode voltage compensation circuit that the display control circuit includes is used to compensate the public affairs on the display panel
Public electrode voltages on common-battery polar curve.
Compared with prior art, common electrode voltage compensation circuit of the present invention, method, display control circuit and aobvious
Whether showing device will show the picture of preassigned pattern by using detection unit on a display panel according to detection of data signal
Face then exports corresponding first compensating control signal to compensating unit, and compensating unit is according to first compensating control signal
Public electrode voltages are accordingly compensated after one predetermined time, to realize the violent wave to public electrode voltages under special frame mode
Dynamic precompensation eliminates the crosstalk phenomenon under special frame.
Detailed description of the invention
Fig. 1 is the structural block diagram of common electrode voltage compensation circuit described in the embodiment of the present invention；
Fig. 2 is the structure chart of common electrode voltage compensation circuit described in another embodiment of the present invention；
Fig. 3 is the structure chart of common electrode voltage compensation circuit described in further embodiment of this invention；
Fig. 4 is the structure chart of common electrode voltage compensation circuit described in yet another embodiment of the invention；
Fig. 5 is the structure chart of common electrode voltage compensation circuit described in further embodiment of this invention；
Fig. 6 A is the circuit diagram of a specific embodiment of common electrode voltage compensation circuit of the present invention；
Fig. 6 B is the signal waveforms of the specific embodiment of present invention common electrode voltage compensation circuit as shown in Figure 6A；
Fig. 7 is the flow chart of common electrode voltage compensation method of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is 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.
As shown in Figure 1, common electrode voltage compensation circuit described in the embodiment of the present invention includes:
Detection unit 11, for after being detected according to data-signal Vdata in the first predetermined time t1 in display panel
On by the picture for showing preassigned pattern when, export first compensating control signal S1 corresponding with the preassigned pattern；And
Compensating unit 12, for public in the first predetermined time t1 post-compensation according to the first compensating control signal S1
Electrode voltage.
Common electrode voltage compensation circuit described in the embodiment of the present invention is examined by using detection unit according to data-signal
Whether will on a display panel show the picture of preassigned pattern, then export corresponding first compensating control signal to compensating list if surveying
Member, compensating unit accordingly compensate public electrode voltages after the first predetermined time according to first compensating control signal, to realize
To the precompensation of big ups and downs of the public electrode voltages under special frame mode, the crosstalk phenomenon under special frame is eliminated.
The picture of the preassigned pattern can (high frequency be vertical for High Frequency Streaking and Ringing
Striped) meeting such as picture or High-Contrast Streaking (high contrast striped) picture so that public electrode voltages generate
Big ups and downs relevant with screen refresh rate, to generate the picture of crosstalk phenomenon.
Specifically, as shown in Fig. 2, the first compensating control signal S1 may include first switch signal SW1 and compensation
Voltage signal VCp；
The compensating unit 12 is opened including compensated operational amplifier 21, control module 22, D/A converter module 23 and first
Close module 24, feedback resistance Rf and input resistance Ri, wherein
The control module 22 is connect with the detection unit 11, for according to first predetermined time t1 and this first
Compensating control signal S1 exports first switch signal SW1 and digital compensation voltage signal DVCp；
The D/A converter module 23 is connect with the control module 22, is used for digital compensation voltage signal DVCp
It converts to analog compensation voltage signal AVCp；
The first switch module 24 is connect with the control module 22, for being existed according to the first switch signal SW1
The analog compensation voltage signal AVCp is controlled after second predetermined time t2, and the compensation fortune is accessed by the input resistance Ri
Calculate the inverting input terminal of amplifier 21；
The normal phase input end of the compensated operational amplifier 21 accesses predetermined direct current voltage VCOM, the compensation operation amplification
Feedback resistance Rf, the benefit are connected between the inverting input terminal of device 21 and the output end OUT of the compensated operational amplifier 21
The output end OUT of operational amplifier 21 is repaid to connect with the public electrode wire (not showing in Fig. 2) on display panel；Described first is predetermined
Time t1 is equal to the sum of the conversion time of second predetermined time t2 and the compensated operational amplifier 21.
Specifically, as shown in figure 3, the first switch module 24 may include: first switch transistor M1, grid access
The first switch signal SW1, the first pole are connect with the D/A converter module 23, the second pole by input resistance Ri with it is described
The inverting input terminal of compensated operational amplifier 21 connects.
Specifically, as shown in figure 4, the detection unit 11, is also used to be detected not according to the data-signal Vdata
There are when the picture of preassigned pattern, the second compensating control signal S2 is exported；
The control 22 is also used to when receiving the second compensating control signal S2, is controlled according to second compensation
Signal S2 exports second switch signal SW2；
The compensating unit 11 further includes compensating electric capacity C, feedback end Feed and second switch module 25；
The feedback end Feed is connect with the predetermined point on the public electrode wire on the display panel；
The first end of the compensating electric capacity C is connect by the second switch module 25 with the feedback end Feed, described
The second end of compensating electric capacity C is connect by the input resistance Ri with the first end of the input resistance Ri；
The second switch module 25, for the feedback end Feed to be connected according to second switch signal SW2 control
Connection between the first end of the compensating electric capacity C.
When the data-signal there is no special pattern (can cause the preassigned pattern meeting of the violent waveform of public electrode voltages
Face) when, the control module 22 that the compensating unit 12 includes is believed also according to the second compensation control that detection unit 11 exports
Number S2 generates second switch signal SW2, and the compensating unit 12 further includes compensating electric capacity C, feedback end FEED and second switch module
25, feedback end FEED is connect with the predetermined point on the public electrode wire on display panel, when the predetermined point on public electrode wire
Public electrode voltages the public electrode voltages are fed back into the feedback end FEED when generating fluctuation, then by being sequentially connected in series
Compensating electric capacity C, second switch module 25 and input resistance Ri be connected to the inverting input terminal of compensated operational amplifier 21, at this time
Connection between two switch modules 25 conducting feedback end Feed and compensating electric capacity, and the output end of the compensated operational amplifier 21
OUT is connected on public electrode wire, is operated by the feedback compensation of compensated operational amplifier to compensate on public electrode wire
The variation of public electrode voltages.
Specifically, as shown in figure 5, the second switch module 25 includes: second switch transistor M2, described in grid access
Second switch signal SW2, the first pole are connect with the feedback end FEED, and the second pole is connect with the first end of the compensating electric capacity C.
Specifically, as shown in Figure 6A, the timing control electricity for including in the display panel can be set in the detection unit
In the TCON of road；
Described in the initial signal STV that the control module is specifically used for being exported according to the sequential control circuit TCON is determined
First predetermined time t1.
In the specific embodiment shown in Fig. 6 A, the control module is MCU ((Microcontroller Unit, micro-control
Unit processed)；
The sequential control circuit TCON can transmit the first compensating control signal and/or second to MCU by I2C interface
Compensating control signal；
MCU can be connect by LVDS (Low-Voltage Differential Signaling, low-voltage differential signal)
Mouth sends digital compensation voltage signal DVCp to D/A converter module 23；
In practical operation, I2C interface and LVDS interface also may alternatively be the interface of other forms, to interface form
And be not construed as limiting, by way of example only.
Present invention embodiment as shown in Figure 6A at work, when TCON detects picture (special mould of special pattern
The big ups and downs that the picture of formula can cause public electrode voltages Vc as shown in Figure 6B) when, the first compensation is controlled by I2C interface
Signal is transferred to MCU, establishes the communication protocol between MCU and TCON, and MCU identifies first compensating control signal, and according to rising
Beginning signal STV obtains that public electrode voltages Vc can generate waveform afterwards in the first predetermined time t1 (as depicted in figure 6b), and waits until
After the rising edge of initial signal STV, by MCU control M1 conducting after the second predetermined time t2, to control D/A converter module
The analog compensation voltage signal AVCp (waveform of AVCp is as shown in Figure 6B) of 23 outputs passes sequentially through M1 and Ri access operation amplifier
The inverting input terminal of device 21, and the operational amplifier 21 is accessing the analog compensation voltage signal to institute when its inverting input terminal
The output end OUT for stating operational amplifier 21 exports the time of corresponding offset voltage (namely conversion time of operational amplifier 21)
For Δ t, by Fig. 6 B it is found that t1=t2+ Δ t, the voltage Vout and public electrode of the output end OUT output of union amplifier 21
The fluctuation of public electrode voltages Vc on line just reverse phase, so as to compensate the fluctuation of public electrode voltages；Vout and VCOM,
VDAC(VDACFor by the voltage value of the analog compensation voltage signal AVCp exported by D/A converter module 23), the relational expression of Rf and Ri
It is as follows:
In fig. 6b, t1 is the rising edge of STV and public electrode in the case where precompensation under the picture of special pattern
Voltage Vc is generated the time interval of fluctuation by coupling, and t2 is that MCU is receiving the first compensating control signal for indicating that M1 need to be opened
When after the rising edge for detecting STV to open M1 between delay time, Δ t be D/A converter module be output to operation amplifier
Conversion time between device output.
In addition, working as present invention embodiment as shown in Figure 6A at work, public electrode can be caused electric when not detecting
When pressing the picture of the preassigned pattern of big ups and downs, MCU sends corresponding first compensating control signal to M1, and MCU sends phase to M2
The second compensating control signal answered, control M1 is disconnected and M2 is connected, at this time the voltage of the output end OUT output of operational amplifier 21
Vout and Vfeed (Vfeed is the feedback voltage accessed by feedback end FEED), the relational expression of VCOM, Rf and Ri are as follows:
As shown in fig. 7, common electrode voltage compensation method described in the embodiment of the present invention includes:
S71: detecting step: when detection unit according to detection of data signal in the first predetermined time after on a display panel
When by the picture for showing preassigned pattern, detection unit exports the first compensating control signal corresponding with the preassigned pattern；
S72: compensation process: compensating unit is public in the first predetermined time post-compensation according to first compensating control signal
Common-battery pole tension.
Common electrode voltage compensation method described in the embodiment of the present invention is examined by using detection unit according to data-signal
Whether will on a display panel show the picture of preassigned pattern, then export corresponding first compensating control signal to compensating list if surveying
Member, compensating unit accordingly compensate public electrode voltages after the first predetermined time according to first compensating control signal, to realize
To the precompensation of big ups and downs of the public electrode voltages under special frame mode, the crosstalk phenomenon under special frame is eliminated.
Specifically, first compensating control signal includes first switch signal and compensation voltage signal；The compensation is single
Member includes compensated operational amplifier, control module, D/A converter module, first switch module, feedback resistance and input resistance；Institute
State compensated operational amplifier normal phase input end access predetermined direct current voltage, the output end of the compensated operational amplifier with it is public
Electrode wires connection；It is connected between the inverting input terminal of the compensated operational amplifier and the output end of the compensated operational amplifier
There is the feedback resistance；
The compensation process specifically includes:
The control module according to first predetermined time and first compensating control signal output first switch signal and
Digital compensation voltage signal；
The D/A converter module converts the digital compensation voltage signal to analog compensation voltage signal；
The first switch module controls the analog compensation according to the first switch signal after the second predetermined time
Voltage signal accesses the inverting input terminal of the compensated operational amplifier by the input resistance；
First predetermined time be equal to second predetermined time and the compensated operational amplifier conversion time it
With.
Specifically, the compensating unit further includes compensating electric capacity, feedback end and second switch module；
The feedback end is connect with the predetermined point on the public electrode wire on the display panel；
The first end of the compensating electric capacity is connect by the second switch module with the feedback end, the compensating electric capacity
Second end connect with the first end of the input resistance；The reverse phase of the second end of the input resistance and the operational amplifier
Input terminal connection；
The detecting step further include: when the detection unit according to the detection of data signal to be not present preassigned pattern
Picture when, the detection unit exports the second compensating control signal；
The compensation process further include:
When the control module receives second compensating control signal, the control module is mended according to described second
Repay control signal output second switch signal；
The second switch module controls according to the second switch signal and the feedback end and the compensating electric capacity is connected
Between connection.
Specifically, the detection unit can be set on the sequential control circuit that the display panel includes；
The compensation process further include: the control module is determined according to the initial signal that the sequential control circuit exports
First predetermined time.
Display control circuit described in the embodiment of the present invention, including above-mentioned common electrode voltage compensation circuit.
Specifically, the display control circuit further includes sequential control circuit；
The detection unit that the common electrode voltage compensation circuit includes is set on the sequential control circuit；The control
Molding root tuber determined for the first predetermined time according to the initial signal that the sequential control circuit exports.
Display device described in the embodiment of the present invention includes display panel and above-mentioned display control circuit；
The common electrode voltage compensation circuit that the display control circuit includes is used to compensate the public affairs on the display panel
Public electrode voltages on common-battery polar curve.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (11)
1. a kind of common electrode voltage compensation circuit characterized by comprising
Detection unit, for that will show pre- cover half on a display panel after according to detection of data signal in the first predetermined time
When the picture of formula, the first compensating control signal corresponding with the preassigned pattern is exported；And
Compensating unit is used for according to first compensating control signal in the first predetermined time post-compensation public electrode voltages；
First compensating control signal includes first switch signal and compensation voltage signal；
The compensating unit includes compensated operational amplifier, control module, D/A converter module, first switch module, feedback electricity
Resistance and input resistance, wherein
The control module is connect with the detection unit, for according to first predetermined time and the first compensation control letter
Number output first switch signal and digital compensation voltage signal；
The D/A converter module is connect with the control module, is mended for converting the digital compensation voltage signal to simulation
Repay voltage signal；
The first switch module, connect with the control module, is used for according to the first switch signal in the second pre- timing
Between after the control analog compensation voltage signal anti-phase input of the compensated operational amplifier is accessed by the input resistance
End；
The normal phase input end of the compensated operational amplifier accesses predetermined direct current voltage, and the reverse phase of the compensated operational amplifier is defeated
Enter and be connected with the feedback resistance between end and the output end of the compensated operational amplifier, the compensated operational amplifier it is defeated
Outlet is connect with the public electrode wire on display panel；First predetermined time is equal to second predetermined time and the benefit
Repay the sum of the conversion time of operational amplifier.
2. common electrode voltage compensation circuit as described in claim 1, which is characterized in that the first switch module includes:
First switch transistor, grid access the first switch signal, and the first pole is connect with the D/A converter module, and second is extremely logical
The input resistance Ri is crossed to connect with the inverting input terminal of the compensated operational amplifier.
3. common electrode voltage compensation circuit as described in claim 1, which is characterized in that the detection unit is also used to work as
According to the detection of data signal to there is no when the picture of preassigned pattern, the second compensating control signal is exported；
The control module is also used to when receiving second compensating control signal, according to the second compensation control letter
Number output second switch signal；
The compensating unit further includes compensating electric capacity, feedback end and second switch module；
The feedback end is connect with the predetermined point on the public electrode wire on the display panel；
The first end of the compensating electric capacity is connect by the second switch module with the feedback end, and the of the compensating electric capacity
Two ends are connect with the first end of the input resistance；The anti-phase input of the second end of the input resistance and the operational amplifier
End connection；
The feedback end and the compensating electric capacity is connected for controlling according to the second switch signal in the second switch module
First end between connection.
4. common electrode voltage compensation circuit as claimed in claim 3, which is characterized in that the second switch module includes:
Second switch transistor, grid access the second switch signal, and the first pole is connect with the feedback end, the second pole and the benefit
Repay the first end connection of capacitor.
5. the common electrode voltage compensation circuit as described in any claim in Claims 1-4, which is characterized in that described
Detection unit is set on the sequential control circuit that the display panel includes；
The control module is specifically used for determining the described first pre- timing according to the initial signal that the sequential control circuit exports
Between.
6. a kind of common electrode voltage compensation method characterized by comprising
Detecting step: when detection unit according to detection of data signal in the first predetermined time after on a display panel will display it is pre-
When the picture of mould-fixed, detection unit exports the first compensating control signal corresponding with the preassigned pattern；
Compensation process: compensating unit is according to first compensating control signal in the first predetermined time post-compensation public electrode electricity
Pressure；
First compensating control signal includes first switch signal and compensation voltage signal；The compensating unit includes compensation fortune
Calculate amplifier, control module, D/A converter module, first switch module, feedback resistance and input resistance；The compensation operation is put
The normal phase input end of big device accesses predetermined direct current voltage, and the output end of the compensated operational amplifier is connect with public electrode wire；
The feedback is connected between the inverting input terminal of the compensated operational amplifier and the output end of the compensated operational amplifier
Resistance；
The compensation process specifically includes:
The control module is according to first predetermined time and first compensating control signal output first switch signal and number
Compensation voltage signal；
The D/A converter module converts the digital compensation voltage signal to analog compensation voltage signal；
The first switch module controls the analog compensation voltage according to the first switch signal after the second predetermined time
Signal accesses the inverting input terminal of the compensated operational amplifier by the input resistance；
First predetermined time is equal to the sum of the conversion time of second predetermined time and the compensated operational amplifier.
7. common electrode voltage compensation method as claimed in claim 6, which is characterized in that the compensating unit further includes compensation
Capacitor, feedback end and second switch module；
The feedback end is connect with the predetermined point on the public electrode wire on the display panel；
The first end of the compensating electric capacity is connect by the second switch module with the feedback end, and the of the compensating electric capacity
Two ends are connect with the first end of the input resistance；The anti-phase input of the second end of the input resistance and the operational amplifier
End connection；
The detecting step further include: when the detection unit is according to the detection of data signal to the picture that preassigned pattern is not present
When face, the detection unit exports the second compensating control signal；
The compensation process further include:
When the control module receives second compensating control signal, the control module is controlled according to second compensation
Signal processed exports second switch signal；
The second switch module is controlled according to the second switch signal and is connected between the feedback end and the compensating electric capacity
Connection.
8. common electrode voltage compensation method as claimed in claims 6 or 7, which is characterized in that the detection unit is set to
On the sequential control circuit that the display panel includes；
The compensation process further include: described in the initial signal that the control module is exported according to the sequential control circuit determines
First predetermined time.
9. a kind of display control circuit, which is characterized in that including public as described in any claim in claim 1 to 5
Electrode voltage compensation circuit.
10. display control circuit as claimed in claim 9, which is characterized in that further include sequential control circuit；
The detection unit that the common electrode voltage compensation circuit includes is set on the sequential control circuit；The control mould
Root tuber determined for the first predetermined time according to the initial signal that the sequential control circuit exports.
11. a kind of display device, which is characterized in that the display control electricity including display panel and as described in claim 9 or 10
Road；
The common electrode voltage compensation circuit that the display control circuit includes is used to compensate the common electrical on the display panel
Public electrode voltages on polar curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274307.XA CN105702195B (en) | 2016-04-28 | 2016-04-28 | Common electrode voltage compensation circuit, method, display control circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274307.XA CN105702195B (en) | 2016-04-28 | 2016-04-28 | Common electrode voltage compensation circuit, method, display control circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105702195A CN105702195A (en) | 2016-06-22 |
| CN105702195B true CN105702195B (en) | 2018-12-07 |
Family
ID=56216715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610274307.XA Active CN105702195B (en) | 2016-04-28 | 2016-04-28 | Common electrode voltage compensation circuit, method, display control circuit and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105702195B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106023877B (en) * | 2016-08-15 | 2019-02-19 | 京东方科技集团股份有限公司 | Common electrical voltage regulator circuit, method, display panel and device |
| CN106652934B (en) | 2016-11-24 | 2024-04-05 | 合肥鑫晟光电科技有限公司 | Source electrode driving circuit and display device |
| CN109920383A (en) * | 2017-12-12 | 2019-06-21 | 咸阳彩虹光电科技有限公司 | A kind of common electrode voltage compensating device and method |
| CN108320715A (en) * | 2018-01-03 | 2018-07-24 | 惠科股份有限公司 | Liquid crystal display device and driving method thereof |
| CN108665841B (en) * | 2018-05-09 | 2021-09-14 | 京东方科技集团股份有限公司 | Common electrode voltage compensation circuit and display device |
| CN109285516B (en) * | 2018-11-09 | 2020-10-16 | 惠科股份有限公司 | Driving method, driving circuit and display device |
| CN109377960B (en) * | 2018-12-14 | 2020-07-10 | 深圳市华星光电半导体显示技术有限公司 | Common voltage regulating circuit and common voltage regulating method |
| CN114267309B (en) * | 2021-12-25 | 2023-03-10 | 重庆惠科金渝光电科技有限公司 | Public voltage detection circuit, display module and display device |
| CN114740648B (en) * | 2022-03-28 | 2023-11-28 | Tcl华星光电技术有限公司 | Display panel, driving method thereof and display device |
| CN114743516B (en) * | 2022-04-11 | 2023-10-20 | 惠科股份有限公司 | Compensation circuit and liquid crystal display device |
| CN115223515B (en) * | 2022-07-22 | 2023-11-28 | 深圳市华星光电半导体显示技术有限公司 | Display device and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008145496A (en) * | 2006-12-06 | 2008-06-26 | Sharp Corp | Liquid crystal display device, and common electrode driving circuit therefor |
| CN102005185A (en) * | 2009-09-02 | 2011-04-06 | 北京京东方光电科技有限公司 | Reference voltage compensating device and method |
| CN103514854A (en) * | 2013-10-28 | 2014-01-15 | 京东方科技集团股份有限公司 | Public electrode voltage compensation control circuit and method, array substrate and display device |
| US20140168043A1 (en) * | 2012-12-14 | 2014-06-19 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Data driver circuit, lcd device and driving method |
| CN104658500A (en) * | 2015-03-04 | 2015-05-27 | 京东方科技集团股份有限公司 | Common voltage compensating method and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080062926A (en) * | 2006-12-29 | 2008-07-03 | 엘지디스플레이 주식회사 | Circuit for compensating common volatage of liquid crystal display device |
-
2016
- 2016-04-28 CN CN201610274307.XA patent/CN105702195B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008145496A (en) * | 2006-12-06 | 2008-06-26 | Sharp Corp | Liquid crystal display device, and common electrode driving circuit therefor |
| CN102005185A (en) * | 2009-09-02 | 2011-04-06 | 北京京东方光电科技有限公司 | Reference voltage compensating device and method |
| US20140168043A1 (en) * | 2012-12-14 | 2014-06-19 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Data driver circuit, lcd device and driving method |
| CN103514854A (en) * | 2013-10-28 | 2014-01-15 | 京东方科技集团股份有限公司 | Public electrode voltage compensation control circuit and method, array substrate and display device |
| CN104658500A (en) * | 2015-03-04 | 2015-05-27 | 京东方科技集团股份有限公司 | Common voltage compensating method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105702195A (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105702195B (en) | Common electrode voltage compensation circuit, method, display control circuit and display device | |
| CN106023877B (en) | Common electrical voltage regulator circuit, method, display panel and device | |
| WO2007035015A1 (en) | Display, column driver integrated circuit, and multi-level detector, and multi-level detection method | |
| KR20080012541A (en) | Driving ic, liquid crystal display and display system | |
| US8634028B2 (en) | Method and apparatus for DC restoration using feedback | |
| CN103475213A (en) | Power supply circuit with multi-stage charge pump | |
| US10741112B2 (en) | Display apparatus and protection circuit thereof | |
| US20190130812A1 (en) | Display driving circuit, driving method thereof and display apparatus | |
| CN101510406A (en) | Drive method for main voltage of liquid crystal display | |
| CN101169769A (en) | Circuit and method of compensating for signal delay in a cable | |
| CN105632395B (en) | A kind of compensation circuit and display device of public electrode voltages | |
| CN108198531A (en) | Common voltage generation circuit and generation method, display device | |
| TW201735549A (en) | Signal calibration circuit and signal calibration device | |
| CN103268748B (en) | A kind of voltage control method of electrode and device | |
| CN212341358U (en) | Multifunctional power frequency synchronous signal generator for partial discharge detection | |
| US10606400B2 (en) | Touch panel driving apparatus | |
| WO2007013718A1 (en) | Clock signal embedded multi-level signaling method and apparatus for driving display panel using the same | |
| US20140176194A1 (en) | Zero crossing detector using current mode approach | |
| CN208767006U (en) | A kind of HPD signal control circuit, timing controller and display device | |
| CN110310608A (en) | Control circuit, test equipment and the test method of liquid crystal display panel | |
| CN104155811B (en) | Display compensation device, display device and display compensation method | |
| CN109936701B (en) | Signal integration device and signal integration method | |
| CN116153232B (en) | Gamma voltage compensation circuit, compensation method and display device | |
| US20230092523A1 (en) | Transmission device, relay device, and reception device | |
| CN210609444U (en) | Mural television and video signal transmission module thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |