CN105702195A - Common electrode voltage compensation circuit and method, display control circuit and display device - Google Patents
Common electrode voltage compensation circuit and method, display control circuit and display device Download PDFInfo
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- CN105702195A CN105702195A CN201610274307.XA CN201610274307A CN105702195A CN 105702195 A CN105702195 A CN 105702195A CN 201610274307 A CN201610274307 A CN 201610274307A CN 105702195 A CN105702195 A CN 105702195A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2077—Display of intermediate tones by a combination of two or more gradation control methods
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
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Abstract
The invention provides a common electrode voltage compensation circuit and method, a display control circuit and a display device. The common electrode voltage compensation circuit comprises a detection unit which is used for outputting a first compensation control signal corresponding to a preset mode when a situation that a frame of a preset mode is displayed on a display panel after a first preset period of time is detected according to a data signal; and a compensation unit which is used for compensating common electrode voltage after the first preset period of time according to the first compensation control signal. Whether the frame of the preset mode is displayed on the display panel is detected according to the data signal through the detection unit and then the corresponding first compensation control signal is outputted to the compensation unit, and the compensation unit correspondingly compensates common electrode voltage after the first preset period of time according to the first compensation control signal so that pre-compensation for sharp fluctuation of common electrode voltage under a special frame mode can be realized and the crosstalk phenomenon under the special frame can be eliminated.
Description
Technical field
The present invention relates to common electrode voltage compensation technical field, particularly relate to a kind of common electrode voltage compensation circuit, method, display control circuit and display device。
Background technology
Under the picture of the special patterns such as HighFrequencyStreakingandRinging (the vertical striped of high frequency) picture or High-ContrastStreaking (high-contrast striped) picture, public electrode voltages can be produced big ups and downs by coupling influence, goes up on the display screen and can show very strong crosstalk (crosstalk) phenomenon。Owing to, under some special frame, public electrode voltages fluctuation acutely, is difficult to realize common electrode voltage compensation by existing feedback circuit。
Existing common electrode voltage compensation circuit is the negative-phase input by the public electrode voltages of the predetermined point on the public electrode wire on display floater is fed back to operational amplifier by feedback resistance, and the outfan of operational amplifier is connected with public electrode wire, to realize the compensation to public electrode voltages。But existing common electrode voltage compensation circuit is that then the public electrode voltages first detected on the public electrode wire of display floater compensates again, namely be compensate further according to the fluctuation situation detected after having fluctuated occurs in the public electrode voltages on public electrode wire, can result under the picture of preassigned pattern, (namely can cause the picture of public electrode voltages big ups and downs) can not pass through precompensation to eliminate the crosstalk phenomenon under special frame。
Summary of the invention
A kind of common electrode voltage compensation circuit of offer is provided, method, display control circuit and display device, solving existing common electrode voltage compensation circuit is that then the public electrode voltages first detected on the public electrode wire of display floater compensates again, namely it is compensate further according to the fluctuation situation detected after having fluctuated occurs in the public electrode voltages on public electrode wire, under the picture of preassigned pattern, (namely can cause the picture of public electrode voltages big ups and downs) precompensation problem to eliminate the crosstalk phenomenon under special frame can not be passed through thus result in。
In order to achieve the above object, the invention provides a kind of common electrode voltage compensation circuit, including:
Detection unit, for when according to detection of data signal to after first scheduled time on a display panel by show preassigned pattern picture time, export first compensating control signal corresponding with this preassigned pattern；And,
Compensating unit, is used for according to this first compensating control signal in described first scheduled time post-compensation public electrode voltages。
During enforcement, described first compensating control signal includes the first switching signal and compensation voltage signal；
Described compensating unit includes compensated operational amplifier, controls module, D/A converter module, the first switch module, feedback resistance and input resistance, wherein,
Described control module, is connected with described detection unit, for exporting the first switching signal and numeral compensation voltage signal according to this first scheduled time and this first compensating control signal；
Described D/A converter module, is connected with described control module, for this digital compensation voltage signal is converted to analog compensation voltage signal；
Described first switch module, is connected with described control module, is accessed the inverting input of described compensated operational amplifier by described input resistance for controlling described analog compensation voltage signal after second scheduled time according to described first switching signal；
The normal phase input end of described compensated operational amplifier accesses predetermined direct current voltage, being connected to described feedback resistance between inverting input and the outfan of described compensated operational amplifier of described compensated operational amplifier, the outfan of described compensated operational amplifier is connected with the public electrode wire on display floater；Described first scheduled time is equal to the conversion time sum of described second scheduled time with described compensated operational amplifier。
During enforcement, described first switch module includes: the first switch transistors pipe, and grid accesses described first switching signal, and the first pole is connected with described D/A converter module, and the second pole is connected with the inverting input of described compensated operational amplifier by described input resistance Ri。
During enforcement, described detection unit, be additionally operable to when according to described detection of data signal to when being absent from the picture of preassigned pattern, export the second compensating control signal；
Described control module, is additionally operable to when receiving described second compensating control signal, according to described second compensating control signal output second switch signal；
Described compensating unit also includes compensating electric capacity, feedback end and second switch module；
Described feedback end is connected with the predetermined point on the public electrode wire on described display floater；
First end of described compensation electric capacity is connected with described feedback end by described second switch module, and the second end of described compensation electric capacity is connected with the first end of described input resistance；Second end of described input resistance is connected with the inverting input of described operational amplifier；
Described second switch module, for controlling to turn on the connection between described feedback end and the first end of described compensation electric capacity according to described second switch signal。
During enforcement, described second switch module includes: second switch transistor, and grid accesses described second switch signal, and the first pole is connected with described feedback end, and the second pole is connected with the first end of described compensation electric capacity。
During enforcement, described detection unit is arranged on the sequential control circuit that described display floater includes；
Described control module determines described first scheduled time specifically for the initial signal exported according to described sequential control circuit。
Present invention also offers a kind of common electrode voltage compensation method, including:
Detecting step: when detecting unit according to detection of data signal to time after first scheduled time on a display panel by the picture of display preassigned pattern, detection unit exports first compensating control signal corresponding with this preassigned pattern；
Compensation process: compensating unit according to this first compensating control signal in described first scheduled time post-compensation public electrode voltages。
During enforcement, described first compensating control signal includes the first switching signal and compensation voltage signal；Described compensating unit includes compensated operational amplifier, controls module, D/A converter module, the first switch module, feedback resistance and input resistance；The normal phase input end of described compensated operational amplifier accesses predetermined direct current voltage, and the outfan of described compensated operational amplifier is connected with public electrode wire；It is connected to described feedback resistance between inverting input and the outfan of described compensated operational amplifier of described compensated operational amplifier；
Described compensation process specifically includes:
Described control module exports the first switching signal and numeral compensation voltage signal according to this first scheduled time and this first compensating control signal；
This digital compensation voltage signal is converted to analog compensation voltage signal by described D/A converter module；
Described first switch module is controlled described analog compensation voltage signal after second scheduled time according to described first switching signal and is accessed the inverting input of described compensated operational amplifier by described input resistance；
Described first scheduled time is equal to the conversion time sum of described second scheduled time with described compensated operational amplifier。
During enforcement, described compensating unit also includes compensating electric capacity, feedback end and second switch module；
Described feedback end is connected with the predetermined point on the public electrode wire on described display floater；
First end of described compensation electric capacity is connected with described feedback end by described second switch module, and the second end of described compensation electric capacity is connected with the first end of described input resistance；Second end of described input resistance is connected with the inverting input of described operational amplifier；
Described detecting step also includes: when described detection unit according to described detection of data signal to when being absent from the picture of preassigned pattern, described detection unit exports the second compensating control signal；
Described compensation process also includes:
When described control module receives described second compensating control signal, described control module is according to described second compensating control signal output second switch signal；
Described second switch module controls to turn on the connection between described feedback end and described compensation electric capacity according to described second switch signal。
During enforcement, described detection unit is arranged on the sequential control circuit that described display floater includes；
Described compensation process also includes: described control module determines described first scheduled time according to the initial signal that described sequential control circuit exports。
Present invention also offers a kind of display control circuit, including above-mentioned common electrode voltage compensation circuit。
During enforcement, display control circuit of the present invention also includes sequential control circuit；
The detection unit that described common electrode voltage compensation circuit includes is arranged on described sequential control circuit；Described control module determined for first scheduled time according to the initial signal that described sequential control circuit exports。
Present invention also offers a kind of display device, including display floater and above-mentioned display control circuit；
The common electrode voltage compensation circuit that described display control circuit includes is for compensating the public electrode voltages on the public electrode wire on described display floater。
Compared with prior art, common electrode voltage compensation circuit of the present invention, method, display control circuit and display device, by adopting whether detection unit is about to show on a display panel the picture of preassigned pattern according to detection of data signal, then export corresponding first compensating control signal to compensating unit, compensating unit compensates public electrode voltages accordingly according to this first compensating control signal after first scheduled time, to realize the precompensation to public electrode voltages big ups and downs under special frame pattern, eliminate the crosstalk phenomenon under special frame。
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the common electrode voltage compensation circuit described in the embodiment of the present invention；
Fig. 2 is the structure chart of the common electrode voltage compensation circuit described in another embodiment of the present invention；
Fig. 3 is the structure chart of the common electrode voltage compensation circuit described in further embodiment of this invention；
Fig. 4 is the structure chart of the common electrode voltage compensation circuit described in yet another embodiment of the invention；
Fig. 5 is the structure chart of the 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。
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。
As it is shown in figure 1, the common electrode voltage compensation circuit described in the embodiment of the present invention includes:
Detection unit 11, for when picture by display preassigned pattern on a display panel being detected after the first scheduled time t1 according to data signal Vdata, exporting the first compensating control signal S1 corresponding with this preassigned pattern；And,
Compensating unit 12, is used for according to this first compensating control signal S1 in described first scheduled time t1 post-compensation public electrode voltages。
Common electrode voltage compensation circuit described in the embodiment of the present invention is by adopting whether detection unit is about to show on a display panel the picture of preassigned pattern according to detection of data signal, then export corresponding first compensating control signal to compensating unit, compensating unit compensates public electrode voltages accordingly according to this first compensating control signal after first scheduled time, to realize the precompensation to public electrode voltages big ups and downs under special frame pattern, eliminate the crosstalk phenomenon under special frame。
The picture of described preassigned pattern can make public electrode voltages produce the big ups and downs relevant with screen refresh rate for HighFrequencyStreakingandRinging (the vertical striped of high frequency) picture or High-ContrastStreaking (high-contrast striped) picture etc., thus producing the picture of crosstalk phenomenon。
Concrete, as in figure 2 it is shown, described first compensating control signal S1 can include the first switching signal SW1 and compensation voltage signal VCp；
Described compensating unit 12 includes compensated operational amplifier 21, controls module 22, D/A converter module 23 and the first switch module 24, feedback resistance Rf and input resistance Ri, wherein,
Described control module 22, is connected with described detection unit 11, for exporting the first switching signal SW1 and numeral compensation voltage signal DVCp according to this first scheduled time t1 and this first compensating control signal S1；
Described D/A converter module 23, is connected with described control module 22, for this digital compensation voltage signal DVCp is converted to analog compensation voltage signal AVCp；
Described first switch module 24, it is connected with described control module 22, is accessed the inverting input of described compensated operational amplifier 21 by described input resistance Ri for controlling described analog compensation voltage signal AVCp after the second scheduled time t2 according to described first switching signal SW1；
The normal phase input end of described compensated operational amplifier 21 accesses predetermined direct current voltage VCOM, it is connected to feedback resistance Rf, the outfan OUT of described compensated operational amplifier 21 between inverting input and the outfan OUT of described compensated operational amplifier 21 of described compensated operational amplifier 21 to be connected with the public electrode wire (not showing in Fig. 2) on display floater；Described first scheduled time t1 conversion time sum equal to described second scheduled time t2 with described compensated operational amplifier 21。
Concrete, as it is shown on figure 3, described first switch module 24 may include that the first switch transistors pipe M1, grid accesses described first switching signal SW1, first pole is connected with described D/A converter module 23, and the second pole is connected with the inverting input of described compensated operational amplifier 21 by input resistance Ri。
Concrete, as shown in Figure 4, described detection unit 11, it is additionally operable to when detecting, according to described data signal Vdata, the picture being absent from preassigned pattern, exports the second compensating control signal S2；
Described control 22 is additionally operable to when receiving described second compensating control signal S2, exports second switch signal SW2 according to described second compensating control signal S2；
Described compensating unit 11 also includes compensating electric capacity C, feedback end Feed and second switch module 25；
Described feedback end Feed is connected with the predetermined point on the public electrode wire on described display floater；
First end of described compensation electric capacity C is connected with described feedback end Feed by described second switch module 25, and second end of described compensation electric capacity C is connected by first end of described input resistance Ri and described input resistance Ri；
Described second switch module 25, for controlling to turn on the connection between described feedback end Feed and first end of described compensation electric capacity C according to described second switch signal SW2。
In time being absent from data signal (preassigned pattern that namely can cause the violent waveform of public electrode voltages is met) of special pattern, the control module 22 that described compensating unit 12 includes generates second switch signal SW2 always according to the second compensating control signal S2 of detection unit 11 output, described compensating unit 12 also includes compensating electric capacity C, feedback end FEED and second switch module 25, feedback end FEED is connected with the predetermined point on the public electrode wire on display floater, this public electrode voltages to be fed back to when the public electrode voltages of the predetermined point on public electrode wire produces fluctuation described feedback end FEED, then pass through the compensation electric capacity C being sequentially connected in series, second switch module 25 and input resistance Ri are connected to the inverting input of compensated operational amplifier 21, now second switch module 25 turns on feedback end Feed and the connection compensated between electric capacity, and the outfan OUT of this compensated operational amplifier 21 is connected on public electrode wire, the change to compensate the public electrode voltages on public electrode wire is operated by the feedback compensation of compensated operational amplifier。
Concrete, as it is shown in figure 5, described second switch module 25 includes: second switch transistor M2, grid accesses described second switch signal SW2, and the first pole is connected with described feedback end FEED, and the second pole is connected with first end of described compensation electric capacity C。
Concrete, as shown in Figure 6A, described detection unit can be arranged in the sequential control circuit TCON that described display floater includes；
Described control module is specifically for determining described first scheduled time t1 according to the described sequential control circuit TCON initial signal STV exported。
In the specific embodiment shown in Fig. 6 A, described control module is MCU ((MicrocontrollerUnit, micro-control unit)；
Described sequential control circuit TCON can transmit the first compensating control signal and/or the second compensating control signal by I2C interface to MCU；
MCU can pass through LVDS (Low-VoltageDifferentialSignaling, low-voltage differential signal) interface and send digital compensation voltage signal DVCp to D/A converter module 23；
When practical operation, I2C interface and LVDS interface can also be replaced by the interface of other forms, and docking port form is also not construed as limiting, by way of example only。
Present invention embodiment as shown in Figure 6A is operationally, when TCON detects picture (picture of this special pattern can cause public electrode voltages Vc big ups and downs as shown in Figure 6B) of special pattern, by I2C interface, the first compensating control signal is transferred to MCU, set up the communication protocol between MCU and TCON, MCU identifies this first compensating control signal, and obtain to produce waveform at the first scheduled time t1 (as depicted in figure 6b) public electrode voltages Vc afterwards according to initial signal STV, and after waiting until the rising edge of initial signal STV, M1 conducting is controlled by MCU after the second scheduled time t2, thus the analog compensation voltage signal AVCp (waveform of AVCp is as shown in Figure 6B) controlling D/A converter module 23 output passes sequentially through M1 and Ri accesses the inverting input of operational amplifier 21, and described operational amplifier 21 is being Δ t when its inverting input accesses this analog compensation voltage signal to the outfan OUT of described operational amplifier 21 time (namely operational amplifier 21 change the time) exporting corresponding bucking voltage, from Fig. 6 B, t1=t2+ Δ t, the voltage Vout of the outfan OUT output of union amplifier 21 is just anti-phase with the fluctuation of the public electrode voltages Vc on public electrode wire, such that it is able to compensate the fluctuation of public electrode voltages；Vout and VCOM, VDAC(VDACMagnitude of voltage for by the analog compensation voltage signal AVCp exported by D/A converter module 23), the relational expression of Rf and Ri as follows:
In fig. 6b, t1 is that the rising edge of STV is with non-precompensation under the picture of special pattern, public electrode voltages Vc is by coupling the interval producing fluctuation, t2 is MCU receiving when instruction need to open first compensating control signal of M1 after detecting the rising edge of STV to the delay time opening between M1, Δ t be D/A converter module export operational amplifier export between the conversion time。
Additionally, when present invention embodiment as shown in Figure 6A operationally, when being not detected by the picture that can cause the preassigned pattern of public electrode voltages big ups and downs, MCU sends corresponding first compensating control signal to M1, MCU sends corresponding second compensating control signal to M2, control M1 disconnect and M2 conducting, now operational amplifier 21 outfan OUT output voltage Vout and Vfeed (Vfeed is the feedback voltage accessed by feedback end FEED), VCOM, Rf and Ri relational expression as follows:
As it is shown in fig. 7, the common electrode voltage compensation method described in the embodiment of the present invention includes:
S71: detecting step: when detecting unit according to detection of data signal to time after first scheduled time on a display panel by the picture of display preassigned pattern, detection unit exports first compensating control signal corresponding with this preassigned pattern；
S72: compensation process: compensating unit according to this first compensating control signal in described first scheduled time post-compensation public electrode voltages。
Common electrode voltage compensation method described in the embodiment of the present invention is by adopting whether detection unit is about to show on a display panel the picture of preassigned pattern according to detection of data signal, then export corresponding first compensating control signal to compensating unit, compensating unit compensates public electrode voltages accordingly according to this first compensating control signal after first scheduled time, to realize the precompensation to public electrode voltages big ups and downs under special frame pattern, eliminate the crosstalk phenomenon under special frame。
Concrete, described first compensating control signal includes the first switching signal and compensation voltage signal；Described compensating unit includes compensated operational amplifier, controls module, D/A converter module, the first switch module, feedback resistance and input resistance；The normal phase input end of described compensated operational amplifier accesses predetermined direct current voltage, and the outfan of described compensated operational amplifier is connected with public electrode wire；It is connected to described feedback resistance between inverting input and the outfan of described compensated operational amplifier of described compensated operational amplifier；
Described compensation process specifically includes:
Described control module exports the first switching signal and numeral compensation voltage signal according to this first scheduled time and this first compensating control signal；
This digital compensation voltage signal is converted to analog compensation voltage signal by described D/A converter module；
Described first switch module is controlled described analog compensation voltage signal after second scheduled time according to described first switching signal and is accessed the inverting input of described compensated operational amplifier by described input resistance；
Described first scheduled time is equal to the conversion time sum of described second scheduled time with described compensated operational amplifier。
Concrete, described compensating unit also includes compensating electric capacity, feedback end and second switch module；
Described feedback end is connected with the predetermined point on the public electrode wire on described display floater；
First end of described compensation electric capacity is connected with described feedback end by described second switch module, and the second end of described compensation electric capacity is connected with the first end of described input resistance；Second end of described input resistance is connected with the inverting input of described operational amplifier；
Described detecting step also includes: when described detection unit according to described detection of data signal to when being absent from the picture of preassigned pattern, described detection unit exports the second compensating control signal；
Described compensation process also includes:
When described control module receives described second compensating control signal, described control module is according to described second compensating control signal output second switch signal；
Described second switch module controls to turn on the connection between described feedback end and described compensation electric capacity according to described second switch signal。
Concrete, described detection unit can be arranged on the sequential control circuit that described display floater includes；
Described compensation process also includes: described control module determines described first scheduled time according to the initial signal that described sequential control circuit exports。
Display control circuit described in the embodiment of the present invention, including above-mentioned common electrode voltage compensation circuit。
Concrete, described display control circuit also includes sequential control circuit；
The detection unit that described common electrode voltage compensation circuit includes is arranged on described sequential control circuit；Described control module determined for first scheduled time according to the initial signal that described sequential control circuit exports。
Display device described in the embodiment of the present invention includes display floater and above-mentioned display control circuit；
The common electrode voltage compensation circuit that described display control circuit includes is for compensating the public electrode voltages on the public electrode wire on described display floater。
The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from principle of the present invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention。
Claims (13)
1. a common electrode voltage compensation circuit, it is characterised in that including:
Detection unit, for when according to detection of data signal to after first scheduled time on a display panel by show preassigned pattern picture time, export first compensating control signal corresponding with this preassigned pattern；And, compensating unit, it is used for according to this first compensating control signal in described first scheduled time post-compensation public electrode voltages。
2. common electrode voltage compensation circuit as claimed in claim 1, it is characterised in that described first compensating control signal includes the first switching signal and compensation voltage signal；
Described compensating unit includes compensated operational amplifier, controls module, D/A converter module, the first switch module, feedback resistance and input resistance, wherein,
Described control module, is connected with described detection unit, for exporting the first switching signal and numeral compensation voltage signal according to this first scheduled time and this first compensating control signal；
Described D/A converter module, is connected with described control module, for this digital compensation voltage signal is converted to analog compensation voltage signal；
Described first switch module, is connected with described control module, is accessed the inverting input of described compensated operational amplifier by described input resistance for controlling described analog compensation voltage signal after second scheduled time according to described first switching signal；
The normal phase input end of described compensated operational amplifier accesses predetermined direct current voltage, being connected to described feedback resistance between inverting input and the outfan of described compensated operational amplifier of described compensated operational amplifier, the outfan of described compensated operational amplifier is connected with the public electrode wire on display floater；Described first scheduled time is equal to the conversion time sum of described second scheduled time with described compensated operational amplifier。
3. common electrode voltage compensation circuit as claimed in claim 2, it is characterized in that, described first switch module includes: the first switch transistors pipe, grid accesses described first switching signal, first pole is connected with described D/A converter module, and the second pole is connected with the inverting input of described compensated operational amplifier by described input resistance Ri。
4. common electrode voltage compensation circuit as claimed in claim 2, it is characterised in that described detection unit, be additionally operable to when according to described detection of data signal to when being absent from the picture of preassigned pattern, export the second compensating control signal；
Described control module, is additionally operable to when receiving described second compensating control signal, according to described second compensating control signal output second switch signal；
Described compensating unit also includes compensating electric capacity, feedback end and second switch module；
Described feedback end is connected with the predetermined point on the public electrode wire on described display floater；
First end of described compensation electric capacity is connected with described feedback end by described second switch module, and the second end of described compensation electric capacity is connected with the first end of described input resistance；Second end of described input resistance is connected with the inverting input of described operational amplifier；
Described second switch module, for controlling to turn on the connection between described feedback end and the first end of described compensation electric capacity according to described second switch signal。
5. common electrode voltage compensation circuit as claimed in claim 4, it is characterized in that, described second switch module includes: second switch transistor, and grid accesses described second switch signal, first pole is connected with described feedback end, and the second pole is connected with the first end of described compensation electric capacity。
6. the common electrode voltage compensation circuit as described in any claim in claim 2 to 5, it is characterised in that described detection unit is arranged on the sequential control circuit that described display floater includes；
Described control module determines described first scheduled time specifically for the initial signal exported according to described sequential control circuit。
7. a common electrode voltage compensation method, it is characterised in that including:
Detecting step: when detecting unit according to detection of data signal to time after first scheduled time on a display panel by the picture of display preassigned pattern, detection unit exports first compensating control signal corresponding with this preassigned pattern；
Compensation process: compensating unit according to this first compensating control signal in described first scheduled time post-compensation public electrode voltages。
8. common electrode voltage compensation method as claimed in claim 7, it is characterised in that described first compensating control signal includes the first switching signal and compensation voltage signal；Described compensating unit includes compensated operational amplifier, controls module, D/A converter module, the first switch module, feedback resistance and input resistance；The normal phase input end of described compensated operational amplifier accesses predetermined direct current voltage, and the outfan of described compensated operational amplifier is connected with public electrode wire；It is connected to described feedback resistance between inverting input and the outfan of described compensated operational amplifier of described compensated operational amplifier；
Described compensation process specifically includes:
Described control module exports the first switching signal and numeral compensation voltage signal according to this first scheduled time and this first compensating control signal；
This digital compensation voltage signal is converted to analog compensation voltage signal by described D/A converter module；
Described first switch module is controlled described analog compensation voltage signal after second scheduled time according to described first switching signal and is accessed the inverting input of described compensated operational amplifier by described input resistance；
Described first scheduled time is equal to the conversion time sum of described second scheduled time with described compensated operational amplifier。
9. common electrode voltage compensation method as claimed in claim 8, it is characterised in that described compensating unit also includes compensating electric capacity, feedback end and second switch module；
Described feedback end is connected with the predetermined point on the public electrode wire on described display floater；
First end of described compensation electric capacity is connected with described feedback end by described second switch module, and the second end of described compensation electric capacity is connected with the first end of described input resistance；Second end of described input resistance is connected with the inverting input of described operational amplifier；
Described detecting step also includes: when described detection unit according to described detection of data signal to when being absent from the picture of preassigned pattern, described detection unit exports the second compensating control signal；
Described compensation process also includes:
When described control module receives described second compensating control signal, described control module is according to described second compensating control signal output second switch signal；
Described second switch module controls to turn on the connection between described feedback end and described compensation electric capacity according to described second switch signal。
10. common electrode voltage compensation method as claimed in claim 8 or 9, it is characterised in that described detection unit is arranged on the sequential control circuit that described display floater includes；
Described compensation process also includes: described control module determines described first scheduled time according to the initial signal that described sequential control circuit exports。
11. a display control circuit, it is characterised in that include the common electrode voltage compensation circuit as described in any claim in claim 1 to 6。
12. show control circuit as claimed in claim 11, it is characterised in that also include sequential control circuit；
The detection unit that described common electrode voltage compensation circuit includes is arranged on described sequential control circuit；Described control module determined for first scheduled time according to the initial signal that described sequential control circuit exports。
13. a display device, it is characterised in that include display floater and the display control circuit as described in claim 11 or 12；
The common electrode voltage compensation circuit that described display control circuit includes is for compensating the public electrode voltages on the public electrode wire on described display floater。
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 |
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| 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 |
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| CN105702195A true CN105702195A (en) | 2016-06-22 |
| CN105702195B CN105702195B (en) | 2018-12-07 |
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| CN108665841A (en) * | 2018-05-09 | 2018-10-16 | 京东方科技集团股份有限公司 | Common electrode voltage compensation circuit and display device |
| CN109285516A (en) * | 2018-11-09 | 2019-01-29 | 惠科股份有限公司 | A kind of driving method, driving circuit and display device |
| CN109377960A (en) * | 2018-12-14 | 2019-02-22 | 深圳市华星光电半导体显示技术有限公司 | Common electrical voltage regulator circuit and common voltage adjusting method |
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| CN114267309A (en) * | 2021-12-25 | 2022-04-01 | 重庆惠科金渝光电科技有限公司 | Public voltage detection circuit, display module and display device |
| CN114743516A (en) * | 2022-04-11 | 2022-07-12 | 惠科股份有限公司 | Compensation circuit and liquid crystal display device |
| CN114740648A (en) * | 2022-03-28 | 2022-07-12 | Tcl华星光电技术有限公司 | Display panel, driving method thereof and display device |
| CN115223515A (en) * | 2022-07-22 | 2022-10-21 | 深圳市华星光电半导体显示技术有限公司 | Display device and control method thereof |
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