CN107958657B - Pixel driving circuit and method, display panel and display device - Google Patents
Pixel driving circuit and method, display panel and display device Download PDFInfo
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- CN107958657B CN107958657B CN201810050057.0A CN201810050057A CN107958657B CN 107958657 B CN107958657 B CN 107958657B CN 201810050057 A CN201810050057 A CN 201810050057A CN 107958657 B CN107958657 B CN 107958657B
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- liquid crystal
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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
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
Abstract
The invention relates to the technical field of display, and provides a pixel driving circuit and method, a display panel and a display device. The pixel driving circuit includes: a switching element and a pre-charging capacitor. The first end of the switch element receives a data signal, the second end of the switch element is connected with the first end of the liquid crystal capacitor, and the control end of the switch element receives a scanning signal; the first end of the pre-charging capacitor is connected with the first end of the liquid crystal capacitor, and the second end of the pre-charging capacitor receives a pre-charging signal; the data signal is a signal with alternating polarity, the polarity of the pre-charging signal is the same as that of the data signal, and the pre-charging signal is used for pre-charging the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor. The pixel driving circuit provided by the invention can improve the charging speed of the liquid crystal capacitor, thereby improving the technical support for improving the refreshing rate of the display device.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a pixel driving circuit and method, a display panel, and a display device.
Background
Liquid crystal display panels are widely used in various electronic display devices due to their characteristics of power saving, low radiation, soft light, etc. The liquid crystal display panel mainly comprises a plurality of pixels distributed in an array mode, each pixel comprises a liquid crystal capacitor, liquid crystal molecules are arranged between the liquid crystal capacitors, and the arrangement state of the liquid crystal molecules can be changed by changing the voltage between two electrodes of the liquid crystal capacitors, so that the display brightness of the pixels is changed.
In the related art, a data signal is transmitted to each pixel of the pixel array line by line through a data line to charge a liquid crystal capacitance of each pixel, thereby controlling a display state of each pixel. The data line completes the control of the whole pixel array once, namely completing the display of one frame, and the frame number which can be refreshed by the liquid crystal display in one second is the refresh rate of the display.
However, as the demand of the refresh rate of the display increases, the charging speed of the data line to the liquid crystal capacitor in the related art has not been able to satisfy the demand of the refresh rate of the display.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a pixel driving circuit and method, a display panel and a display device, where the pixel driving circuit can increase the charging speed of a liquid crystal capacitor, thereby providing technical support for increasing the refresh rate of the display device.
According to an aspect of the present invention, there is provided a pixel driving circuit including: a switching element and a pre-charge capacitor. The first end of the switch element is used for receiving a data signal, the second end of the switch element is connected with the first end of the liquid crystal capacitor, the control end of the switch element is used for receiving a scanning signal, and the switch element is used for controlling the data signal to be written into the liquid crystal capacitor; the first end of the pre-charging capacitor is connected with the first end of the liquid crystal capacitor, the second end of the pre-charging capacitor is used for receiving a pre-charging signal, and the pre-charging capacitor is used for writing the pre-charging signal into the liquid crystal capacitor in a pre-charging stage; the data signal is a signal with alternating polarity, and the polarity of the precharge signal is the same as that of the data signal.
In an exemplary embodiment of the present invention, the switching element is a thin film transistor, a first terminal of the thin film transistor receives the data signal, a second terminal of the thin film transistor is connected to the first terminal of the liquid crystal capacitor, and a control terminal of the thin film transistor receives a scan signal.
In an exemplary embodiment of the present invention, a capacitance of the precharge capacitor is smaller than a capacitance of the liquid crystal capacitor.
In an exemplary embodiment of the invention, the liquid crystal capacitor includes a first electrode and a second electrode, the first electrode of the liquid crystal capacitor forms a first end of the liquid crystal capacitor, and the second electrode of the liquid crystal capacitor is connected with the common electrode.
According to an aspect of the present invention, there is provided a display panel including: pixel array, scanning line, data line, pre-impact line. The pixel array comprises sub-pixels which are arranged in a matrix manner, wherein each sub-pixel comprises a liquid crystal capacitor, a switching element and a pre-charging capacitor; the first end of the switch element receives a data signal, the second end of the switch element is connected with the first end of the liquid crystal capacitor, and the control end of the switch element receives a scanning signal; the first end of the pre-charging capacitor is connected with the first end of the liquid crystal capacitor, and the second end of the pre-charging capacitor receives a pre-charging signal; the scanning line extends along the first direction and is used for outputting the scanning signal; the data line extends along the second direction and is used for outputting the data signal, and the data signal is a signal with alternating polarity; the pre-charging line extends along the first direction or the second direction and is used for outputting the pre-charging signal; the polarity of the pre-charging signal is the same as that of the data signal, and the pre-charging signal is used for pre-charging the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor.
In an exemplary embodiment of the present invention, a capacitance of the precharge capacitor is smaller than a capacitance of the liquid crystal capacitor.
According to an aspect of the present invention, there is provided a pixel charging method, including:
inputting a data signal to the liquid crystal capacitor under the control of a scanning signal;
generating a pre-charging signal to the liquid crystal capacitor through a pre-charging capacitor before the data signal is written into the liquid crystal capacitor;
the data signal is a signal with alternating polarity, and the pre-charging signal is the same as the data signal in polarity and is used for pre-charging the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor.
In an exemplary embodiment of the present invention, a sum of a charged amount of the data signal to the liquid crystal capacitor and a charged amount of the pre-charge signal to the pre-charge capacitor is equal to a required charged amount of the liquid crystal capacitor.
In an exemplary embodiment of the present invention, a capacitance of the precharge capacitor is smaller than a capacitance of the liquid crystal capacitor.
According to an aspect of the present invention, a display device is provided, which includes the above display panel.
The pixel driving circuit provided by the invention comprises a pre-charging capacitor, wherein the polarity of the pre-charging signal is the same as that of the data signal, so that the pre-charging capacitor can pre-charge the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor. Since the pre-charge capacitor pre-charges the liquid crystal capacitor, the charging amount is reduced when the data signal charges the liquid crystal capacitor. On one hand, the charging time of the data signal to the liquid crystal capacitor is shortened, so that the pixel driving circuit can improve the charging speed of the liquid crystal capacitor, and technical support is provided for improving the refresh rate of the display device. On the other hand, the amount of charge of the liquid crystal capacitance by the data signal decreases, so that the pixel driving circuit can reduce the load of the data signal driving circuit.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
FIG. 1 is a circuit diagram of one exemplary embodiment of a pixel driving circuit in the present disclosure;
FIG. 2 is a timing diagram of scan signals, data signals, and precharge signals in an exemplary embodiment of a pixel driving circuit according to the present disclosure;
FIG. 3 is a diagram illustrating the variation of the first terminal voltage of the liquid crystal capacitor in an exemplary embodiment of the pixel driving circuit of the present disclosure;
FIG. 4 is a schematic diagram of an exemplary embodiment of a display panel according to the present disclosure;
fig. 5 is a flowchart of an exemplary embodiment of a pixel charging method in the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". Other relative terms, such as "high," "low," "top," "bottom," "left," "right," and the like are also intended to have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
The present exemplary embodiment provides a pixel driving circuit, as shown in fig. 1 and 2, fig. 1 is a circuit diagram of an exemplary embodiment of the pixel driving circuit in the present disclosure, and fig. 2 is a timing diagram of a scan signal, a data signal, and a precharge signal in an exemplary embodiment of the pixel driving circuit in the present disclosure. The pixel driving circuit includes: a switching element 1 and a precharge capacitor 2. A first terminal 11 of the switching element 1 is configured to receive a DATA signal VSS, a second terminal 12 of the switching element 1 is connected to a first terminal 31 of the liquid crystal capacitor 3, a control terminal 13 of the switching element 1 is configured to receive a scan signal DATA, and the switching element is configured to control writing of the DATA signal into the liquid crystal capacitor; the first end 21 of the pre-charge capacitor 2 is connected to the first end 31 of the liquid crystal capacitor 3, the second end 22 of the pre-charge capacitor 2 is configured to receive a pre-charge signal PC, and the pre-charge capacitor is configured to write the pre-charge signal into the liquid crystal capacitor in a pre-charge stage; the data signal is a signal with alternating polarity, and the polarity of the precharge signal is the same as that of the data signal.
The pixel driving circuit provided by the invention comprises a pre-charging capacitor, wherein the polarity of the pre-charging signal is the same as that of the data signal, so that the pre-charging capacitor can pre-charge the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor. Since the pre-charge capacitor pre-charges the liquid crystal capacitor, the charging amount is reduced when the data signal charges the liquid crystal capacitor. On one hand, the charging time of the data signal to the liquid crystal capacitor is shortened, so that the pixel driving circuit can improve the charging speed of the liquid crystal capacitor, and technical support is provided for improving the refresh rate of the display device. On the other hand, the amount of charge of the liquid crystal capacitance by the data signal decreases, so that the pixel driving circuit can reduce the load of the data signal driving circuit.
In the present exemplary embodiment, the switching element 1 may be selected as a thin film transistor, a first end of the thin film transistor receives the data signal, a second end of the thin film transistor is connected to a first end of the liquid crystal capacitor, and a control end of the thin film transistor receives a scan signal. A thin film transistor is a field effect transistor that includes a gate electrode, a source electrode, and a drain electrode. When the gate input voltage of the thin film transistor is greater than the turn-on voltage, the source and drain of the thin film transistor are turned on. In the exemplary embodiment, the first end of the thin film transistor is a source electrode, the second end is a drain electrode, and the control end is a gate electrode; the scan signal and the data signal are both periodically varying voltage signals. When the scanning signal received by the control end of the thin film transistor is greater than the conducting voltage, the first end of the thin film transistor is conducted with the second end of the thin film transistor, and at the moment, the data signal received by the first end is transmitted to the liquid crystal capacitor connected with the second end by the thin film transistor, so that the liquid crystal capacitor is charged. It should be understood that in other exemplary embodiments, the switching element 1 may have other options, which are within the scope of the present disclosure.
In the present exemplary embodiment, as shown in fig. 3, a graph of the change of the potential at the first terminal of the liquid crystal capacitor in an exemplary embodiment of the pixel driving circuit in the present disclosure is shown, where the abscissa is time and the ordinate is potential. Between T1-T2 in FIG. 2, the data signal charges the first terminal of the liquid crystal capacitor with positive charges, and the potential of the first terminal of the liquid crystal capacitor is shown as the potential between T1-T2 in FIG. 3; at time T2 in fig. 2, the precharge signal starts to charge negative charges to the second terminal of the precharge capacitor, the positive charges at the first terminal of the liquid crystal capacitor move toward the first terminal of the precharge capacitor under the action of the negative charges at the second terminal of the precharge capacitor, the potential at the first terminal of the liquid crystal capacitor drops as shown by the potentials between T2 and T3 in fig. 3; starting at time T3 in fig. 2, the data signal starts to charge negative charges to the first terminal of the liquid crystal capacitor, the potential of the first terminal of the liquid crystal capacitor is as shown by the potential between T3-T4 in fig. 3, and the potential of the first terminal of the liquid crystal capacitor becomes negative; at time T4 in fig. 2, the precharge signal starts to charge positive charges to the second terminal of the precharge capacitor, the negative charges at the first terminal of the liquid crystal capacitor move toward the first terminal of the precharge capacitor due to the positive charges at the second terminal of the precharge capacitor, the potential at the first terminal of the liquid crystal capacitor is shown as the potential between T4-T5 in fig. 3, and the absolute value of the potential at the first terminal of the liquid crystal capacitor decreases. Therefore, the precharge capacitor is precharged by the precharge signal, so that the charge amount of the data signal to the liquid crystal capacitor can be reduced. The sum of the charging amount of the data signal to the liquid crystal capacitor and the charging amount of the pre-charging signal to the liquid crystal capacitor is equal to the charging amount required by the liquid crystal capacitor.
In this exemplary embodiment, the pre-charge capacitor and the liquid crystal capacitor can be regarded as two capacitors connected in series, the smaller the capacitance of the pre-charge capacitor is, the larger the voltage division of the pre-charge capacitor is, the larger the change amount of the absolute value of the potential at the first end of the liquid crystal capacitor when the pre-charge signal is applied to the pre-charge capacitor is, and the less the charge is required when the data signal charges the liquid crystal capacitor. Therefore, in the present exemplary embodiment, the capacitance of the pre-charge capacitor may be selected to be smaller than the capacitance of the liquid crystal capacitor.
In the present exemplary embodiment, the liquid crystal capacitor may include a first electrode 31 and a second electrode 32, the first electrode 31 is the first end 31 of the liquid crystal capacitor, and the second electrode 32 of the liquid crystal capacitor is connected to a common electrode (not shown in the figure). The first electrode 31 may be disposed on a color filter substrate of the display panel, the second electrode 32 is disposed on an array substrate of the display panel, and a vertical electric field may be generated between the first electrode 31 and the second electrode 32. Of course, the first electrode 31 and the second electrode 32 may be disposed on an array substrate connected to the display panel, and a lateral electric field may be generated between the first electrode 31 and the second electrode 32. It should be understood that there are many more ways to arrange the first electrode and the second electrode of the liquid crystal capacitor on the display panel in the present disclosure, which all fall within the scope of the present invention.
According to an aspect of the present invention, a display panel is provided, as shown in fig. 4, which is a schematic structural diagram of an exemplary embodiment of the display panel in the present disclosure. The display panel may include: pixel array, scanning line 4, data line 5, pre-flush line 6. Wherein, the scanning line 4 can be provided with a scanning signal by a gate driving circuit; the data lines 5 may be supplied with data signals by a data driving circuit; the precharge line 6 may be supplied with a precharge signal by a precharge driver circuit.
The pixel array may include sub-pixels 7 arranged in a matrix, and in the present exemplary embodiment, nine sub-pixels are exemplified. The sub-pixel comprises a liquid crystal capacitor 71, a switch element 72 and a pre-charging capacitor 73; a first end of the switch element 72 receives a data signal, a second end of the switch element is connected with a first end of the liquid crystal capacitor 71, and a control end of the switch element receives a scanning signal; a first terminal of the pre-charge capacitor 73 is connected to a first terminal of the liquid crystal capacitor 71, and a second terminal thereof receives a pre-charge signal.
The scanning line 4 extends along the first direction for outputting the scanning signal; the data line 5 extends along the second direction and is used for outputting the data signal, and the data signal is a signal with alternating polarity; the pre-charging line 6 extends along the first direction and is used for outputting the pre-charging signal; the polarity of the pre-charging signal is the same as that of the data signal, and the pre-charging signal is used for pre-charging the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor. In other embodiments, the pre-punching line 6 may also extend in the second direction, which are within the scope of the present disclosure.
In the exemplary embodiment, the capacitance of the pre-charge capacitor is smaller than the capacitance of the liquid crystal capacitor.
The display panel disclosed in the exemplary embodiment has the same technical features and action principles as those of the pixel driving circuit, and the above description has been given in detail, and will not be repeated herein.
The present exemplary embodiment further provides a pixel charging method, as shown in fig. 5, which is a flowchart of an exemplary embodiment of the pixel charging method in the present disclosure. The method comprises the following steps:
step S1: inputting a data signal to the liquid crystal capacitor under the control of a scanning signal;
step S2: generating a pre-charging signal to the liquid crystal capacitor through a pre-charging capacitor before the data signal is written into the liquid crystal capacitor;
the data signal is a signal with alternating polarity, and the pre-charging signal is the same as the data signal in polarity and is used for pre-charging the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor.
In an exemplary embodiment of the present invention, a sum of a charged amount of the data signal to the liquid crystal capacitor and a charged amount of the pre-charge signal to the pre-charge capacitor is equal to a required charged amount of the liquid crystal capacitor.
In an exemplary embodiment of the present invention, a capacitance of the precharge capacitor is smaller than a capacitance of the liquid crystal capacitor.
The pixel charging method disclosed in the present exemplary embodiment has the same technical features and action principles as the pixel driving circuit, and the above description has been made in detail, and is not repeated herein.
The present exemplary embodiment also provides a display device, which is characterized by including the display panel described above.
The display device disclosed in the exemplary embodiment has the same technical features and action principles as those of the display panel, and the above contents have been described in detail and are not repeated herein.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, and the features discussed in connection with the embodiments are interchangeable, if possible. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
Claims (10)
1. A pixel driving circuit, comprising:
the first end of the switch element is used for receiving a data signal, the second end of the switch element is connected with the first end of the liquid crystal capacitor, the control end of the switch element is used for receiving a scanning signal, and the switch element is used for controlling the data signal to be written into the liquid crystal capacitor;
the first end of the pre-charging capacitor is connected with the first end of the liquid crystal capacitor, the second end of the pre-charging capacitor is used for receiving a pre-charging signal, and the pre-charging capacitor is used for writing the pre-charging signal into the liquid crystal capacitor in a pre-charging stage;
the data signal is a signal with alternating polarity, and the polarity of the precharge signal is the same as that of the data signal.
2. The pixel driving circuit according to claim 1, wherein the switching element is a thin film transistor.
3. The pixel driving circuit according to claim 1, wherein the capacitance of the pre-charge capacitor is smaller than the capacitance of the liquid crystal capacitor.
4. The pixel driving circuit according to claim 3, wherein the liquid crystal capacitor comprises a first electrode and a second electrode, the first electrode of the liquid crystal capacitor is the first end of the liquid crystal capacitor, and the second electrode of the liquid crystal capacitor is connected to a common electrode.
5. A display panel, comprising:
the pixel array comprises sub-pixels which are arranged in a matrix manner, wherein each sub-pixel comprises a liquid crystal capacitor, a switching element and a pre-charging capacitor; the first end of the switch element receives a data signal, the second end of the switch element is connected with the first end of the liquid crystal capacitor, and the control end of the switch element receives a scanning signal; the first end of the pre-charging capacitor is connected with the first end of the liquid crystal capacitor, and the second end of the pre-charging capacitor receives a pre-charging signal;
a scan line extending in a first direction for outputting the scan signal;
the data line extends along a second direction and is used for outputting the data signal, and the data signal is a signal with alternating polarity;
the pre-charging line extends along the first direction or the second direction and is used for outputting the pre-charging signal; the polarity of the pre-charging signal is the same as that of the data signal, and the pre-charging signal is used for pre-charging the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor.
6. The display panel of claim 5, wherein the capacitance of the pre-charge capacitor is smaller than the capacitance of the liquid crystal capacitor.
7. A pixel charging method, comprising:
inputting a data signal to the liquid crystal capacitor under the control of a scanning signal;
writing a pre-charging signal into the liquid crystal capacitor through a pre-charging capacitor before the data signal is written into the liquid crystal capacitor;
the data signal is a signal with alternating polarity, and the polarity of the pre-charge signal is the same as that of the data signal, and is used for pre-charging the liquid crystal capacitor before the data signal is written into the liquid crystal capacitor.
8. The pixel charging method according to claim 7, wherein a sum of a charging amount of the data signal to the liquid crystal capacitor and a charging amount of the pre-charge signal to the pre-charge capacitor is equal to a charging amount required by the liquid crystal capacitor.
9. The pixel charging method according to claim 7, wherein a capacitance of the pre-charge capacitor is smaller than a capacitance of the liquid crystal capacitor.
10. A display device characterized by comprising the display panel according to claim 5 or 6.
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| CN108957882A (en) * | 2018-07-16 | 2018-12-07 | 惠科股份有限公司 | A kind of display panel and display device |
| CN109801585B (en) * | 2019-03-25 | 2022-07-29 | 京东方科技集团股份有限公司 | Display panel driving circuit and driving method and display panel |
| CN110164361B (en) * | 2019-06-05 | 2020-12-25 | 京东方科技集团股份有限公司 | Pixel driving circuit and driving method thereof, and display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109858A (en) * | 2007-08-31 | 2008-01-23 | 友达光电股份有限公司 | LCD with precharging circuit |
| CN105785681A (en) * | 2016-05-20 | 2016-07-20 | 京东方科技集团股份有限公司 | Display device and manufacturing method thereof |
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| US9230497B2 (en) * | 2011-02-14 | 2016-01-05 | Sharp Kabushiki Kaisha | Display device having each pixel divided into sub pixels for improved view angle characteristic |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109858A (en) * | 2007-08-31 | 2008-01-23 | 友达光电股份有限公司 | LCD with precharging circuit |
| CN105785681A (en) * | 2016-05-20 | 2016-07-20 | 京东方科技集团股份有限公司 | Display device and manufacturing method thereof |
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