CN104700768B - A kind of common electric voltage compensation circuit, its compensation method and display device - Google Patents
A kind of common electric voltage compensation circuit, its compensation method and display device Download PDFInfo
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Abstract
The invention discloses a kind of common electric voltage compensation circuit, its compensation method and display device, sampling module determines common electric voltage fluctuation signal according to the public voltage signal sampled, and the first input end of comparison module is output to after the common electric voltage fluctuation signal determined is amplified；When the amplitude of the common electric voltage fluctuation signal of comparison module after amplification is not less than the amplitude of default maximum fluctuation signal, the first input end of the first level signal of output to compensating module, otherwise, the first input end of output second electrical level signal to compensating module；Compensating module is when receiving the first level signal, common electric voltage compensation is carried out to the input of public electrode according to the compensation voltage signal of input, when receiving second electrical level signal, terminate to compensate the common electric voltage of the input of public electrode, so selective common electric voltage compensation, common electric voltage compensation is carried out to all pictures relative to common electric voltage compensation circuit in the prior art, the power consumption of common electric voltage compensation circuit is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a common voltage compensation circuit, a compensation method thereof and a display device.
Background
At present, in the existing display device, when different pictures are displayed, the coupling degree of the common voltage signal in the display panel is different, that is, when different pictures are displayed, the fluctuation range of the common voltage signal is different, for example, when a green picture is displayed, because the fluctuation range of the common voltage signal applied to each sub-pixel is particularly large, the phenomenon of green light on the display picture occurs, in order to improve the above problem, generally, a common voltage compensation circuit needs to be arranged in the display device, which is beneficial to improving the picture quality displayed by the display device.
However, in the prior art, the common voltage compensation circuit performs common voltage compensation on all pictures displayed by the display device, and when the display device displays a general gray scale image, the fluctuation range of the common voltage signal is small, and the common voltage signal does not need to be compensated.
Therefore, how to reduce the power consumption of the common voltage compensation circuit in the display device is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a common voltage compensation circuit, a compensation method thereof and a display device, which are used for solving the problem that the power consumption of the common voltage compensation circuit is larger in the prior art.
The embodiment of the invention provides a public voltage compensation circuit, which comprises: the device comprises a sampling module, a comparison module and a compensation module; the input end of the sampling module is connected with the output end of the common electrode, and the output end of the sampling module is connected with the first input end of the comparison module; the second input end of the comparison module is used for inputting a preset maximum fluctuation signal, and the output end of the comparison module is connected with the first input end of the compensation module; the second input end of the compensation module is used for inputting a common voltage signal, the third input end of the compensation module is used for inputting a compensation voltage signal, and the output end of the compensation module is connected with the input end of the common electrode; wherein,
the sampling module is used for sampling the common voltage signal, determining a common voltage fluctuation signal according to a sampling result, amplifying the determined common voltage fluctuation signal and outputting the amplified common voltage fluctuation signal to the first input end of the comparison module;
the comparison module is used for comparing the amplitude of the amplified common voltage fluctuation signal with the amplitude of a preset maximum fluctuation signal at the same moment, and outputting a first level signal to the first input end of the compensation module when the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, outputting a second level signal to the first input end of the compensation module;
the compensation module is used for carrying out common voltage compensation on the input end of the common electrode according to the input compensation voltage signal when receiving the first level signal, and finishing the common voltage compensation on the input end of the common electrode when receiving the second level signal.
In a possible implementation manner, in the above-mentioned common voltage compensation circuit provided in an embodiment of the present invention, the sampling module specifically includes: the circuit comprises a first capacitor, a first resistor, a second resistor and a first amplifier;
one end of the first capacitor is connected with the input end of the common electrode, and the other end of the first capacitor is connected with one end of the second resistor;
the other end of the second resistor is respectively connected with one end of the first resistor and the first input end of the first amplifier;
the second input end of the first amplifier is connected with the low level signal end, and the output end of the first amplifier is respectively connected with the other end of the first resistor and the first input end of the comparison module.
In a possible implementation manner, in the common voltage compensation circuit provided in an embodiment of the present invention, the comparing module specifically includes: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a comparator and an inverter;
one end of the third resistor is connected with the output end of the sampling module, and the other end of the third resistor is connected with the first input end of the comparator;
a second input end of the comparator is connected with one end of the fourth resistor and one end of the fifth resistor respectively, and an output end of the comparator is connected with one end of the sixth resistor;
the other end of the fourth resistor is input with a preset maximum fluctuation signal;
the other end of the fifth resistor is connected with the other end of the sixth resistor and the input end of the phase inverter respectively;
and the output end of the phase inverter is connected with the first input end of the compensation module.
In a possible implementation manner, in the above-mentioned common voltage compensation circuit provided in an embodiment of the present invention, the compensation module specifically includes: the switch transistor, the second capacitor, the seventh resistor, the eighth resistor, the second amplifier, the first transistor and the second transistor:
the grid electrode of the switching transistor is connected with the output end of the comparison module, the source electrode of the switching transistor is connected with a power supply signal end, and the drain electrode of the switching transistor is connected with the control end of the second amplifier;
a first input end of the second amplifier inputs a compensation voltage signal, and a second input end of the second amplifier is respectively connected with one end of the seventh resistor and one end of the eighth resistor;
the other end of the seventh resistor is connected with one end of the second capacitor;
the other end of the second capacitor is input with a common voltage signal;
the other end of the eighth resistor is connected with the output end of the second amplifier, the grid electrode of the first transistor and the grid electrode of the second transistor respectively;
the source electrode of the first transistor is connected with a first reference signal end, and the drain electrode of the first transistor is respectively connected with the drain electrode of the second transistor and the input end of the common electrode;
and the source electrode of the second transistor is connected with a second reference signal end.
The embodiment of the present invention provides a compensation method for the common voltage compensation circuit provided by the embodiment of the present invention, including:
sampling the common voltage signal, determining a common voltage fluctuation signal according to a sampling result, and amplifying the determined common voltage fluctuation signal;
comparing the amplitude of the amplified common voltage fluctuation signal with the amplitude of a preset maximum fluctuation signal at the same moment, and outputting a first level signal when the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, outputting a second level signal;
and when the first level signal is received, carrying out common voltage compensation on the input end of the common electrode according to the input compensation voltage signal, and when the second level signal is received, finishing the common voltage compensation on the input end of the common electrode.
The embodiment of the invention provides a display device which comprises the common voltage compensation circuit provided by the embodiment of the invention.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a public voltage compensation circuit, a compensation method and a display device thereof, wherein the public voltage compensation circuit comprises: the device comprises a sampling module, a comparison module and a compensation module; the sampling module is used for sampling the common voltage signal, determining a common voltage fluctuation signal according to a sampling result, amplifying the determined common voltage fluctuation signal and outputting the amplified common voltage fluctuation signal to a first input end of the comparison module; the comparison module is used for comparing the amplitude of the amplified public voltage fluctuation signal at the same moment with the amplitude of a preset maximum fluctuation signal, and outputting a first level signal to the first input end of the compensation module when the amplitude of the amplified public voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, outputting a second level signal to the first input end of the compensation module; the compensation module is used for carrying out common voltage compensation on the input end of the common electrode according to the input compensation voltage signal when receiving the first level signal, and finishing the common voltage compensation on the input end of the common electrode when receiving the second level signal. Therefore, when the display device displays different pictures, the amplitude of the common voltage fluctuation signal is compared with the amplitude of the preset maximum fluctuation signal, the compensation is carried out when the common voltage is determined to be compensated, and the compensation is not carried out when the compensation is not needed.
Drawings
Fig. 1 is a schematic structural diagram of a common voltage compensation circuit according to an embodiment of the present invention;
fig. 2-4 are schematic structural diagrams of a common voltage compensation circuit according to an embodiment of the present invention;
FIG. 5 is a flowchart of a common voltage compensation method according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating an embodiment of a common voltage compensation method according to the present invention.
Detailed Description
The following describes specific embodiments of a common voltage compensation circuit, a compensation method thereof, and a display device according to embodiments of the present invention in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a common voltage compensation circuit, as shown in fig. 1, which may include: the device comprises a sampling module 01, a comparison module 02 and a compensation module 03; the input end of the sampling module 01 is connected with the output end Vcom1 of the common electrode, and the output end is connected with the first input end of the comparison module 02; a second input end of the comparison module 02 is used for inputting a preset maximum fluctuation signal D1, and an output end thereof is connected with a first input end of the compensation module 03; a second input end of the compensation module 03 is used for inputting a common voltage signal D2, a third input end is connected to the input end of the compensation voltage signal D3, and an output end is connected to an input end Vcom2 of the common electrode; wherein,
the sampling module 01 is used for sampling the common voltage signal, determining a common voltage fluctuation signal according to a sampling result, amplifying the determined common voltage fluctuation signal and outputting the amplified common voltage fluctuation signal to a first input end of the comparison module 02;
the comparison module 02 is configured to compare the amplitude of the amplified common voltage fluctuation signal at the same time with the amplitude of a preset maximum fluctuation signal D1, and output a first level signal to the first input end of the compensation module 03 when the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, output a second level signal to the first input end of the compensation module 03;
the compensation module 03 is configured to perform common voltage compensation on the input terminal Vcom2 of the common electrode according to the input compensation voltage signal D3 when receiving the first level signal, and end the common voltage compensation on the input terminal Vcom2 of the common electrode when receiving the second level signal.
In the common voltage compensation circuit provided by the embodiment of the invention, the sampling module 01 samples a common voltage signal, determines a common voltage fluctuation signal according to a sampling result, amplifies the determined common voltage fluctuation signal and outputs the amplified common voltage fluctuation signal to the first input end of the comparison module; the comparison module 02 compares the amplitude of the amplified common voltage fluctuation signal at the same time with the amplitude of a preset maximum fluctuation signal D1, outputs a first level signal to the first input end of the compensation module 03 when the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude value of the preset maximum fluctuation signal D1, and outputs a second level signal to the first input end of the compensation module 03 when the amplitude of the amplified common voltage fluctuation signal is less than the amplitude of the preset maximum fluctuation signal D1; when receiving the first level signal, the compensation module 03 performs common voltage compensation on the input end Vcom2 of the common electrode according to the input compensation voltage signal D3, so that when the display device displays different pictures, the common voltage is determined to be compensated by comparing the amplitude of the common voltage fluctuation signal with the amplitude of the preset maximum fluctuation signal, and is not compensated when the common voltage needs to be compensated.
In a specific implementation, in the common voltage compensation circuit provided in the embodiment of the present invention, sampling is performed at an output end of the common electrode, and compensation is performed at an input end of the common electrode, that is, the selected sampling point and the compensation point are respectively located at two ends of the common electrode, so that the amplitude of the common voltage fluctuation signal obtained at the output end of the common electrode is relatively large due to loss of the signal during transmission, and meanwhile, the sampling module may further amplify the obtained common voltage fluctuation signal, so that a minute fluctuation signal in the common voltage signal can be detected, which is beneficial to realizing more accurate common voltage compensation, and when compensating the common voltage, the compensation position is the input end of the common electrode, so that a principle of far and near compensation is adopted, which can provide an adequate compensation voltage signal for the common voltage, that is, when a display device displays a picture needing to compensate the common voltage, the common voltage compensation circuit can provide enough compensation voltage signals, and is beneficial to improving the quality of a display picture.
In a specific implementation, as shown in fig. 2, in the common voltage compensation circuit provided in the embodiment of the present invention, the sampling module 01 may specifically include: a first capacitor C1, a first resistor R1, a second resistor R2 and a first amplifier F1; one end of the first capacitor C1 is connected to the input end Vcom1 of the common electrode, and the other end is connected to one end of the second resistor R2; the other end of the second resistor R2 is connected to one end of the first resistor R1 and the first input end of the first amplifier F1, respectively; a second input terminal of the first amplifier F1 is connected to the low-level signal terminal GND, and an output terminal of the first amplifier F1 is connected to the other terminal of the first resistor R1 and a first input terminal of the comparing module 02, respectively.
Specifically, the first capacitor C1 performs dc blocking coupling sampling on the common voltage signal at the input end Vcom1 of the common electrode, that is, the stable dc voltage signal in the common voltage signal is filtered out through the action of the first capacitor C1 to obtain the amplitude of the common voltage fluctuation signal, the amplitude of the common voltage fluctuation signal is amplified through the amplification action of the first amplifier F1, the amplification factor K1 is the ratio of the first resistor R1 to the second resistor R2, the amplified common voltage fluctuation signal is output to the first input end of the comparison module 02, and then the common voltage fluctuation signal can be compared with the preset maximum fluctuation signal to determine whether the common voltage needs to be compensated.
In a specific implementation, as shown in fig. 3, in the common voltage compensation circuit provided in the embodiment of the present invention, the comparing module 02 may specifically include: a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a comparator B and an inverter V; one end of the third resistor R3 is connected with the output end of the sampling module 01, and the other end is connected with the first input end of the comparator B; a second input end of the comparator B is respectively connected with one end of the fourth resistor R4 and one end of the fifth resistor R5, and an output end of the comparator B is connected with one end of the sixth resistor R6; the other end of the fourth resistor R4 is connected with a preset maximum fluctuation signal D1; the other end of the fifth resistor R5 is connected with the other end of the sixth resistor R6 and the input end of the inverter V respectively; the output of the inverter V is connected to a first input of the compensation module 03.
Specifically, a preset maximum fluctuation signal is input to a second input end of the comparison module 02, that is, one end of the fourth resistor R4, and is amplified by the fourth resistor R4, the fifth resistor R5 and the comparator B by the same factor of K1, and then compared with the amplified public voltage fluctuation signal of K1 received by the first input end of the comparison module 02, that is, one end of the third resistor R3, where when the amplitude of the amplified public voltage fluctuation signal of K1 times is greater than the amplitude of the amplified preset maximum fluctuation signal of K1 times, the inverter V outputs a first level signal, and when the amplitude of the amplified public voltage fluctuation signal of K1 times is less than the amplitude of the amplified preset maximum fluctuation signal of K1 times, the inverter V outputs a second level signal, where the first level signal may control the compensation module 03 to perform public voltage compensation on the input end Vcom2 of the common electrode.
In a specific implementation, as shown in fig. 4, in the common voltage compensation circuit provided in the embodiment of the present invention, the compensation module 03 may specifically include: a switching transistor T1, a second capacitor C2, a seventh resistor R7, an eighth resistor R8, a second amplifier F2, a first transistor M1, and a second transistor M2: the grid electrode of the switch transistor T1 is connected with the output end of the comparison module 02, the source electrode is connected with a power supply signal end VDD, and the drain electrode is connected with the control end of the second amplifier F2; a first input end of the second amplifier F2 is connected to the compensation voltage signal D3, and a second input end is connected to one end of the seventh resistor R7 and one end of the eighth resistor R8 respectively; the other end of the seventh resistor R7 is connected with one end of the second capacitor C2; the other end of the second capacitor C2 is input with a common voltage signal D2; the other end of the eighth resistor R8 is respectively connected to the output end of the second amplifier F2, the gate of the first transistor M1 and the gate of the second transistor M2; the source of the first transistor M1 is connected to the first reference signal terminal VcomH, and the drain is connected to the drain of the second transistor M2 and the input terminal Vcom2 of the common electrode, respectively; the source of the second transistor M2 is connected to the second reference signal terminal VcomL.
Specifically, when the first input terminal of the compensation module 03, that is, the gate of the switching transistor T1 receives a first level signal, the switching transistor T1 is in an on state, the signal of the power signal terminal VDD is output to the control terminal of the second amplifier F2, so that the second amplifier F2 enters an operating state, and further the compensation voltage signal input by the first input terminal of the second amplifier F2 is amplified, and the amplification factor K2 is the ratio of the seventh resistor R7 to the eighth resistor R8, and the amplified compensation voltage signal is output to the input terminal Vcom2 of the common electrode, so as to perform common voltage compensation on the input terminal Vcom2 of the common electrode, and the first transistor M1 and the second transistor M2 in the compensation module 03 are connected in series to form a power amplifier, so as to further perform power amplification on the compensation voltage signal.
Based on the same inventive concept, an embodiment of the present invention provides a compensation method using the common voltage compensation circuit provided by the embodiment of the present invention, as shown in fig. 5, the method may specifically include the following steps:
s101, sampling a common voltage signal, determining a common voltage fluctuation signal according to a sampling result, and amplifying the determined common voltage fluctuation signal;
s102, comparing the amplitude of the amplified common voltage fluctuation signal at the same moment with the amplitude of a preset maximum fluctuation signal, and outputting a first level signal when the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, outputting a second level signal;
and S103, when the first level signal is received, carrying out common voltage compensation on the input end of the common electrode according to the input compensation voltage signal, and when the second level signal is received, finishing the common voltage compensation on the input end of the common electrode.
The common voltage compensation method provided by the embodiment of the present invention is specifically described below with a specific embodiment, and specifically, as shown in fig. 6, the method may specifically include the following implementation steps:
s201, sampling a common voltage signal at the output end of a common electrode, performing blocking coupling sampling on the sampled common voltage signal, determining a common voltage fluctuation signal, and amplifying the common voltage fluctuation signal;
s202, comparing the amplified common voltage fluctuation signal with a preset maximum fluctuation signal, and determining whether the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, if so, executing the step S203, otherwise, ending.
And S203, carrying out common voltage compensation on the input end of the common electrode according to the input compensation voltage signal.
Based on the same inventive concept, an embodiment of the present invention provides a display device, including the common voltage compensation circuit provided in the embodiment of the present invention. The display device can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Since the principle of the display device for solving the problems is similar to that of the common voltage compensation circuit, the implementation of the display device can be referred to the implementation of the common voltage compensation circuit, and repeated details are not repeated.
The embodiment of the invention provides a public voltage compensation circuit, a compensation method and a display device thereof, wherein the public voltage compensation circuit comprises: the device comprises a sampling module, a comparison module and a compensation module; the sampling module is used for sampling the common voltage signal, determining a common voltage fluctuation signal according to a sampling result, amplifying the determined common voltage fluctuation signal and outputting the amplified common voltage fluctuation signal to a first input end of the comparison module; the comparison module is used for comparing the amplitude of the amplified public voltage fluctuation signal at the same moment with the amplitude of a preset maximum fluctuation signal, and outputting a first level signal to the first input end of the compensation module when the amplitude of the amplified public voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, outputting a second level signal to the first input end of the compensation module; the compensation module is used for carrying out common voltage compensation on the input end of the common electrode according to the input compensation voltage signal when receiving the first level signal, and finishing the common voltage compensation on the input end of the common electrode when receiving the second level signal. Therefore, when the display device displays different pictures, the amplitude of the common voltage fluctuation signal is compared with the amplitude of the preset maximum fluctuation signal, the compensation is carried out when the common voltage is determined to be compensated, and the compensation is not carried out when the compensation is not needed.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. A common voltage compensation circuit, comprising: the device comprises a sampling module, a comparison module and a compensation module; the input end of the sampling module is connected with the output end of the common electrode, and the output end of the sampling module is connected with the first input end of the comparison module; the second input end of the comparison module is used for inputting a preset maximum fluctuation signal, and the output end of the comparison module is connected with the first input end of the compensation module; the second input end of the compensation module is used for inputting a common voltage signal, the third input end of the compensation module is used for inputting a compensation voltage signal, and the output end of the compensation module is connected with the input end of the common electrode; wherein,
the sampling module is used for sampling the common voltage signal, determining a common voltage fluctuation signal according to a sampling result, amplifying the determined common voltage fluctuation signal and outputting the amplified common voltage fluctuation signal to the first input end of the comparison module;
the comparison module is used for comparing the amplitude of the amplified common voltage fluctuation signal with the amplitude of a preset maximum fluctuation signal at the same moment, and outputting a first level signal to the first input end of the compensation module when the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, outputting a second level signal to the first input end of the compensation module;
the compensation module is used for performing common voltage compensation on the input end of the common electrode according to an input compensation voltage signal when receiving the first level signal, and finishing the common voltage compensation on the input end of the common electrode when receiving the second level signal;
the sampling module specifically comprises: the circuit comprises a first capacitor, a first resistor, a second resistor and a first amplifier;
one end of the first capacitor is connected with the input end of the common electrode, and the other end of the first capacitor is connected with one end of the second resistor;
the other end of the second resistor is respectively connected with one end of the first resistor and the first input end of the first amplifier;
the second input end of the first amplifier is connected with a low level signal end, and the output end of the first amplifier is respectively connected with the other end of the first resistor and the first input end of the comparison module;
the compensation module specifically comprises: the switch transistor, the second capacitor, the seventh resistor, the eighth resistor, the second amplifier, the first transistor and the second transistor:
the grid electrode of the switching transistor is connected with the output end of the comparison module, the source electrode of the switching transistor is connected with a power supply signal end, and the drain electrode of the switching transistor is connected with the control end of the second amplifier;
a first input end of the second amplifier inputs a compensation voltage signal, and a second input end of the second amplifier is respectively connected with one end of the seventh resistor and one end of the eighth resistor;
the other end of the seventh resistor is connected with one end of the second capacitor;
the other end of the second capacitor is input with a common voltage signal;
the other end of the eighth resistor is connected with the output end of the second amplifier, the grid electrode of the first transistor and the grid electrode of the second transistor respectively;
the source electrode of the first transistor is connected with a first reference signal end, and the drain electrode of the first transistor is respectively connected with the drain electrode of the second transistor and the input end of the common electrode;
and the source electrode of the second transistor is connected with a second reference signal end.
2. The common voltage compensation circuit of claim 1, wherein the comparison module specifically comprises: the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a comparator and an inverter;
one end of the third resistor is connected with the output end of the sampling module, and the other end of the third resistor is connected with the first input end of the comparator;
a second input end of the comparator is connected with one end of the fourth resistor and one end of the fifth resistor respectively, and an output end of the comparator is connected with one end of the sixth resistor;
the other end of the fourth resistor is input with a preset maximum fluctuation signal;
the other end of the fifth resistor is connected with the other end of the sixth resistor and the input end of the phase inverter respectively;
and the output end of the phase inverter is connected with the first input end of the compensation module.
3. A compensation method using the common voltage compensation circuit according to claim 1 or 2, comprising:
sampling the common voltage signal, determining a common voltage fluctuation signal according to a sampling result, and amplifying the determined common voltage fluctuation signal;
comparing the amplitude of the amplified common voltage fluctuation signal with the amplitude of a preset maximum fluctuation signal at the same moment, and outputting a first level signal when the amplitude of the amplified common voltage fluctuation signal is not less than the amplitude of the preset maximum fluctuation signal, otherwise, outputting a second level signal;
and when the first level signal is received, carrying out common voltage compensation on the input end of the common electrode according to the input compensation voltage signal, and when the second level signal is received, finishing the common voltage compensation on the input end of the common electrode.
4. A display device characterized by comprising the common voltage compensation circuit according to claim 1 or 2.
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| CN105513527B (en) * | 2016-02-03 | 2018-03-23 | 京东方科技集团股份有限公司 | A kind of common electric voltage compensation circuit, compensation method and display panel |
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| CN101320170B (en) * | 2007-06-08 | 2010-09-29 | 群康科技(深圳)有限公司 | LCD device |
| JP2009128825A (en) * | 2007-11-27 | 2009-06-11 | Funai Electric Co Ltd | Liquid crystal display device |
| KR101668261B1 (en) * | 2009-12-15 | 2016-10-24 | 엘지디스플레이 주식회사 | Liquid crystal display device and method of fabricating the same |
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