CN112885307B - Display panel, voltage adjusting method of display panel and display device - Google Patents
Display panel, voltage adjusting method of display panel and display device Download PDFInfo
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- CN112885307B CN112885307B CN202110060034.XA CN202110060034A CN112885307B CN 112885307 B CN112885307 B CN 112885307B CN 202110060034 A CN202110060034 A CN 202110060034A CN 112885307 B CN112885307 B CN 112885307B
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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
- G09G3/3696—Generation of voltages supplied to electrode drivers
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a display panel, a voltage regulating method of the display panel and a display device, wherein the display panel comprises a first substrate, a second substrate and a common electrode compensation module; the first substrate comprises a driving layer and a shading electrode, wherein the driving layer comprises a plurality of rows of data lines and a plurality of rows of scanning lines; a common electrode is arranged on one side of the second substrate close to the first substrate; the common electrode compensation module includes: a power supply unit for inputting an initial voltage to the light shielding electrode; the comparison unit is used for receiving the preset common electrode voltage and the common electrode feedback voltage, comparing the preset common electrode voltage and the common electrode feedback voltage and generating a comparison result; and the adjusting unit is used for receiving the comparison result, adjusting the initial voltage according to the comparison result so as to output a corresponding adjusting voltage to the shading electrode, and enabling the actual voltage of the common electrode to be equal to the preset common electrode voltage. The display panel can be prevented from horizontal crosstalk.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a voltage adjusting method of the display panel and a display device.
Background
As a flat panel Display device, a Thin Film Transistor Liquid Crystal Display (TFT-LCD) is increasingly used in the field of high performance Display due to its characteristics of small size, low power consumption, no radiation, relatively low manufacturing cost, etc.
The TFT-LCD is provided with a common electrode and a pixel electrode, and the electric field formed by the common electrode and the pixel electrode controls liquid crystal molecules to deflect so as to achieve the purpose of displaying pictures with different gray scales. However, in the prior art, because the data line and the common electrode have parasitic capacitance, when the voltage of the data line changes, the parasitic capacitance is coupled to affect the voltage on the common electrode, and because of the resistance-capacitance delay, the voltage on the common electrode cannot be recovered to the value set by the reference voltage source in a short time, and the time for the voltage on the common electrode to be recovered to the set potential is longer than the writing time of one data signal, so that the phenomenon of horizontal crosstalk of display is generated.
Therefore, a display panel, a voltage adjusting method of the display panel and a display device are urgently needed to solve the technical problem that the display device in the prior art is prone to horizontal crosstalk.
Disclosure of Invention
The invention provides a display panel, a voltage regulating method of the display panel and a display device, and aims to solve the technical problem that a horizontal crosstalk phenomenon easily occurs in the display device in the prior art.
The application provides a display panel, display panel includes: the first substrate, the second substrate and the common electrode compensation module are oppositely arranged;
the first substrate comprises a driving layer and a shading electrode arranged between the driving layer and the second substrate, and the driving layer comprises a plurality of rows of data lines and a plurality of rows of scanning lines;
a common electrode is arranged on one side of the second substrate close to the first substrate;
the common electrode compensation module includes:
the power supply unit is connected with the shading electrode and is used for inputting initial voltage to the shading electrode;
the comparison unit is connected with the common electrode and used for receiving a preset common electrode voltage and a common electrode feedback voltage, comparing the preset common electrode voltage with the common electrode feedback voltage and generating a comparison result;
and the adjusting unit is connected with the shading electrode and used for receiving the comparison result, outputting and adjusting the initial voltage according to the comparison result, and correspondingly adjusting the voltage to the shading electrode so as to enable the actual voltage on the common electrode to be equal to the preset common electrode voltage.
In some implementations of the present application, the adjustment voltage of the light blocking electrode is opposite in phase to the common electrode feedback voltage.
In some implementations of the present application, the adjustment voltage of the light shielding electrode is the same as the feedback voltage of the common electrode in the same timing sequence.
In some implementations of the present application, the power supply unit has an output for inputting an initial voltage to the shading electrode;
the comparison unit is provided with a first input end, a second input end and an output end, the first input end of the comparison unit is used for inputting the preset common electrode voltage, the second input end of the comparison unit is connected with the common electrode and used for inputting the common electrode feedback voltage, and the output end of the comparison unit is used for outputting the comparison result generated by the comparison unit;
the adjusting unit is provided with a first input end, a second input end and an output end, the first input end of the adjusting unit is connected with the first output end of the power supply unit and used for inputting the initial voltage of the shading electrode, the second input end of the adjusting unit is connected with the first output end of the comparing unit and used for inputting the comparison result generated by the comparing unit, and the output end of the adjusting unit is connected with the shading electrode and used for inputting the adjusting voltage to the shading electrode.
In some implementations of the present application, the adjustment unit includes: the circuit comprises a capacitor, a first resistor, a second resistor, a third resistor and an amplifier;
the one end of electric capacity is connected the common electrode, the electric capacity other end with the one end of first resistance is connected, the other end of first resistance connect respectively in amplifier first input end with the one end of second resistance, the other end of second resistance connect in the output of amplifier, third resistance one end is connected the shading electrode, the third resistance other end connect in the second input of amplifier, the output of amplifier connect in the shading electrode.
In some implementations of the present application, the first substrate further includes a pixel electrode disposed between the driving layer and the second substrate, the pixel electrode and the light shielding electrode are disposed on the same layer, or,
the pixel electrode and the shading electrode are arranged in different layers.
In some implementations of the present application, a thickness of the light shielding electrode is the same as a thickness of the pixel electrode, or,
the thickness of the shading electrode is smaller than that of the pixel electrode.
In some implementations of the present application, the display panel further includes a detection unit, two ends of the detection unit are respectively connected to the common electrode and the comparison unit, and the detection unit is configured to detect a feedback voltage on the common electrode and output the detected feedback voltage of the common electrode to the comparison unit.
The present application also provides a voltage adjusting method of a display panel, the display panel including: the first substrate, the second substrate and the common electrode compensation module are oppositely arranged; the first substrate comprises a driving layer and a transparent electrode layer arranged between the driving layer and the second substrate, the driving layer comprises a plurality of rows of data lines and a plurality of rows of scanning lines, and the transparent electrode layer comprises spaced pixel electrodes and shading electrodes; a common electrode is arranged on one side of the second substrate close to the first substrate; the voltage regulation method of the display panel comprises the following steps:
inputting an initial voltage to the light-shielding electrode;
receiving a preset common electrode voltage and a common electrode feedback voltage, and comparing the preset common electrode voltage with the common electrode feedback voltage to generate a comparison result;
and receiving the comparison result, and adjusting the initial voltage according to the comparison result to output a corresponding adjustment voltage to the shading electrode, so that the actual voltage of the common electrode is equal to the preset common electrode voltage.
The application also provides a display device comprising the display panel in any one of the above implementation modes.
This application is through setting up public electrode compensation module, public electrode feedback voltage on the public electrode compares with predetermine public electrode voltage, and export corresponding regulation voltage to shading electrode according to the comparative result, adjust shading electrode, adjust public electrode's actual voltage through shading electrode, realize the voltage compensation to public electrode, make the actual voltage on the public electrode equal to predetermine public electrode voltage, can effectively promote the stability of public electrode voltage, prevent to lead to display panel to appear horizontal crosstalk because of the fluctuation of public electrode voltage, promote display panel's display effect.
Drawings
FIG. 1 is a schematic diagram illustrating a gray scale test of a display panel according to the prior art;
fig. 2 is a schematic overall structure diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a common electrode compensation module of a display panel according to an embodiment of the present invention
Fig. 4 is a schematic structural diagram of an adjusting unit of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a working principle of a common electrode compensation module according to an embodiment of the present invention;
fig. 6 is a flowchart of a voltage adjustment method of a display panel according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the invention provides a display panel, a voltage adjusting method of the display panel and a display device. The details will be described below.
Examples
As shown in fig. 1, when a black-gray test gray scale image is input to a display panel of the prior art, wherein gray scale data is input to a left data line 111 first, then black gray scale data is input, and finally gray scale data is input, at a position x1, gray scale data is converted from black gray scale data to white gray scale data, because data voltages on a plurality of data lines 111 become large simultaneously, a voltage on a common electrode is increased by an influence of a capacitive coupling effect of the data lines, and when a scan line is closed, a voltage on the common electrode is not restored to a preset voltage, so that a voltage difference between a pixel electrode and the common electrode is further decreased; at the x2 position, when the gray scale data is converted from white gray scale data to black gray scale data, the voltage on the corresponding common electrode is reduced because the data voltage on the data line is reduced, and when the scanning line is closed, the voltage of the common electrode is not restored to the preset voltage, further changing the voltage difference between the pixel electrode and the common electrode. For the pixels on the left data line 111, the white part is more white than the input gray scale, and for the pixels on the right data line 111, the black part is more dark than the input gray scale, so that the horizontal crosstalk phenomenon occurs during viewing.
An embodiment of the present invention provides a display panel 10, as shown in fig. 2 to 4, the display panel 10 includes:
the first substrate 100, the second substrate 200 and the common electrode compensation module 300 are oppositely arranged;
the first substrate 100 includes a driving layer 110 and a light-shielding electrode 122 disposed between the driving layer 100 and the second substrate 200, wherein the driving layer 110 includes a plurality of rows of data lines 111 and a plurality of rows of scanning lines (not shown in the figure);
a common electrode 210 is disposed on one side of the second substrate 200 close to the first substrate 100;
the common electrode compensation module 300 includes:
a power supply unit 310 connected to the light-shielding electrode 122 for inputting an initial voltage V0 to the light-shielding electrode 122;
the comparison unit 320 is connected to the common electrode 210, and is configured to receive the preset common electrode voltage and the common electrode feedback voltage VB, and compare the preset common electrode voltage and the common electrode feedback voltage VB to generate a comparison result;
and the adjusting unit 330, connected to the light-shielding electrode 122, is configured to receive the comparison result and adjust the initial voltage V0 according to the comparison result to output a corresponding adjusting voltage V1 to the light-shielding electrode 122, and the adjusting voltage V1 adjusts the initial voltage V0 of the light-shielding electrode 122 so that the actual voltage of the common electrode 210 is equal to the preset common electrode voltage.
According to the invention, the common electrode compensation module 300 is arranged to compare the common electrode feedback voltage VB on the common electrode 210 with the preset common electrode voltage, generate the adjusting voltage V1 according to the comparison result to adjust the shading electrode 122, and adjust the actual voltage of the common electrode 210 through the shading electrode 122, so that the voltage compensation of the common electrode 10 is realized, the actual voltage on the common electrode 210 is equal to the preset common electrode voltage, the stability of the voltage on the common electrode 210 can be effectively improved, the horizontal crosstalk phenomenon of the display panel 10 caused by the fluctuation of the voltage of the common electrode 210 is prevented, and the display effect of the display panel 10 is improved.
Further, as shown in fig. 5, the adjustment voltage V1 of the light shielding electrode 122 is opposite in phase to the feedback voltage VB of the common electrode 210. With the above arrangement, the adjustment voltage V1 of the light shielding electrode 122 is coupled to the feedback voltage VB of the common electrode 210, so as to achieve the purpose of reducing the variation of the voltage on the common electrode 210, and maintain the stability of the voltage on the common electrode 210, thereby achieving the technical effect of reducing the horizontal crosstalk phenomenon of the display panel 10.
Further, in some embodiments of the present application, the adjustment voltage V1 of the shielding electrode 122 is the same as the feedback voltage VB of the common electrode 210 during the same time sequence. Through the above arrangement, the voltage variation on the common electrode 210 can be completely eliminated, and the horizontal crosstalk phenomenon of the display panel 10 can be avoided.
It should be understood that: as shown in fig. 5, when the adjustment voltage V1 of the shielding electrode 122 is different from the feedback voltage VB of the common electrode 210, the common electrode 210 still has a small-amplitude jump, and the voltage of the common electrode 210 is unstable, which causes horizontal crosstalk.
In some embodiments of the present application, as shown in fig. 3, the power supply unit 310 has an output terminal 311, the power supply unit output terminal 311 is used for inputting an initial voltage V0 to the light-shielding electrode 122;
the comparing unit 320 has a first input end 321, a second input end 322 and an output end 323, the first input end 321 of the comparing unit is used for inputting the preset voltage of the common electrode 210, the second input end 322 of the comparing unit is connected with the common electrode 210 and is used for inputting the feedback voltage VB of the common electrode 210, and the output end 323 of the comparing unit is used for outputting the comparison result generated by the comparing unit 320;
the adjusting unit 330 has a first input 331, a second input 332, and an output 333, the first input 331 of the adjusting unit is connected to the first output 311 of the power supply unit for inputting the initial voltage V0 of the light-shielding electrode 122, the second input 332 of the adjusting unit is connected to the first output 323 of the comparing unit for inputting the comparison result generated by the comparing unit 320, and the output 333 of the adjusting unit is connected to the light-shielding electrode 122 for inputting the adjusting voltage V1 to the light-shielding electrode 122.
Further, as shown in fig. 4, the adjusting unit 330 includes: the circuit comprises a capacitor C, a first resistor R1, a second resistor R2, a third resistor R3 and an amplifier A;
one end of a capacitor C is connected to the common electrode 210 and is configured to receive the common electrode feedback voltage VB, the other end of the capacitor C is connected to one end of a first resistor R1, the other end of the first resistor R1 is connected to the first input end of the amplifier a and one end of a second resistor R2, the other end of the second resistor R2 is connected to the output end of the amplifier a, one end of a third resistor R3 is connected to the light-shielding electrode 122 and is configured to receive the initial voltage V0 of the light-shielding electrode 122, the other end of the third resistor R3 is connected to the second input end of the amplifier a, and the output end of the amplifier a is connected to the light-shielding electrode 122.
Further, in some embodiments of the present disclosure, the first substrate 100 further includes a pixel electrode 121 disposed between the driving layer 110 and the second substrate 200, and the pixel electrode 121 and the light shielding electrode 122 are disposed at the same layer. With the above arrangement, the overall thickness of the display panel 10 can be reduced.
It should be understood that: the pixel electrode 121 and the light-shielding electrode 122 may be made of the same material or different materials, and in order to simplify the manufacturing process, the light-shielding electrode 122 and the pixel electrode 121 are preferably made of the same material.
It should be noted that: in some other embodiments of the present application, the pixel electrode 121 and the light shielding electrode 122 are disposed in different layers.
Further, in some embodiments of the present application, the thickness of the light shielding electrode 122 is the same as the thickness of the pixel electrode 121. With the above arrangement, the manufacture of the display panel 10 can be simplified.
Note that, in other embodiments of the present application, the thickness of the light-shielding electrode 122 is smaller than that of the pixel electrode 121. Through the arrangement, the electric field range of the data line can be effectively compressed, the light leakage problem of the upper and lower visual angles of the data line is remarkably reduced, and the problem of vertical crosstalk of the display panel 10 is improved.
Specifically, the thickness of the light-shielding electrode 122 is smaller than the thickness of the pixel electrode 121 by 0um to 1 um.
When the thickness of the light-shielding electrode 122 is the same as that of the pixel electrode 121, the maximum light leakage luminance of the display panel 10 is 0.000661. When the thickness of the light-shielding electrode 122 is lower than the thickness of the pixel electrode 121 by 0.2um, the maximum light leakage luminance of the display panel 10 is reduced to 0.000552, i.e., the maximum light leakage luminance of the display panel 10 is reduced by 16% with respect to the maximum light leakage luminance when the thickness of the light-shielding electrode 122 and the thickness of the pixel electrode 121 are identical. When the thickness of the light-shielding electrode 122 is lower than the thickness of the pixel electrode 121 by 0.5um, the maximum light leakage luminance of the display panel 10 is reduced to 0.000403, i.e., the maximum light leakage luminance of the display panel 10 is reduced by 39% with respect to the maximum light leakage luminance when the thickness of the light-shielding electrode 122 and the thickness of the pixel electrode 121 are identical. When the thickness of the light-shielding electrode 122 is 1um lower than the thickness of the pixel electrode 121, the maximum light leakage luminance of the display panel 10 is reduced to 0.000199, that is, the maximum light leakage luminance of the display panel 10 is reduced by 70% with respect to the maximum light leakage luminance when the thickness of the light-shielding electrode 122 and the thickness of the pixel electrode 121 are identical. That is, the light leakage of the display panel 10 may be reduced by the thickness of the light shielding electrode 122 and the thickness of the pixel electrode 121.
Further, in some embodiments of the present application, the display panel 10 further includes a detection unit (not shown in the figure), two ends of the detection unit are respectively connected to the common electrode 210 and the comparison unit 310, and the detection unit is configured to detect the feedback voltage VB of the common electrode 210 and output the detected feedback voltage VB of the common electrode 210 to the comparison unit 310.
Further, as shown in fig. 2, in some embodiments of the present application, the display panel 10 further includes a liquid crystal layer 400, and the liquid crystal layer 400 is disposed between the first substrate 100 and the second substrate 200.
Further, as shown in fig. 2, the driving layer 110 further includes a first substrate 112, a plurality of TFTs 113 arranged in an array on the first substrate 112, a passivation layer 114, and a second substrate electrode 115, specifically, the TFTs 113 include: a gate electrode 1131 disposed on the array substrate 112, a gate insulating layer 1132 covering the gate electrode 1131, an active layer 1133 disposed on the gate insulating layer 1132, and a source electrode 1134 and a drain electrode 1135 disposed on the gate insulating layer 1132 and respectively connected to two ends of the active layer 1133. The pixel electrode 121 is connected to the TFT113, and the light-shielding electrode 122 covers the data line 111.
Specifically, the second substrate electrode 115 and the gate 1131 are located on the first metal layer, and are disposed on the first substrate 112. The data line 111, the source 1134 and the drain 1135 are disposed on the second metal layer and are disposed on the gate insulating layer 1132.
Further, the driving layer 110 further includes a light-shielding layer 116 disposed on the first substrate 112.
Further, as shown in fig. 2, the second base plate 200 further includes a second substrate 220 and a color filter layer 230, the common electrode 210 is disposed on the second substrate 220, and the color filter layer 230 is disposed between the second substrate 220 and the common electrode 210.
Further, as shown in fig. 6, an embodiment of the present invention further provides a voltage adjustment method for a display panel, where the display panel 10 includes: the first substrate 100, the second substrate 200 and the common electrode compensation module 300 are oppositely arranged; the first substrate 100 includes a driving layer 110 and a transparent electrode layer 120 disposed between the driving layer 100 and the second substrate 200, the driving layer 110 includes a plurality of rows of data lines 111 and a plurality of rows of scan lines, and the transparent electrode layer 120 includes spaced pixel electrodes 121 and light-shielding electrodes 122; a common electrode 210 is disposed on one side of the second substrate 200 close to the first substrate 100;
the voltage adjusting method of the display panel 10 includes:
step S100 of inputting an initial voltage V0 to the light-shielding electrode 122;
step S200, receiving a preset common electrode voltage and a common electrode feedback voltage VB, and comparing the preset common electrode voltage and the common electrode feedback voltage VB to generate a comparison result;
step S300, receiving the comparison result, and adjusting the initial voltage V0 according to the comparison result to output a corresponding adjusted voltage V1 to the light-shielding electrode 122, so that the actual voltage of the common electrode 210 is equal to the preset common electrode voltage.
The embodiment of the present invention further provides a display device, including the display panel 10 in any of the above embodiments.
To sum up, in the present application, by setting the common electrode compensation module 300, the feedback voltage of the common electrode 210 on the common electrode 210 is compared with the preset common electrode voltage, and the shading electrode 122 is adjusted according to the comparison result, and the actual voltage of the common electrode 210 is adjusted by the shading electrode 122, so as to implement the voltage compensation on the common electrode 10, so that the actual voltage on the common electrode 210 is equal to the preset common electrode voltage, thereby effectively improving the stability of the voltage on the common electrode 210, preventing the horizontal crosstalk phenomenon of the display panel 10 caused by the fluctuation of the voltage of the common electrode 210, and improving the display effect of the display panel 10; meanwhile, the purpose of reducing light leakage of the display panel 10 is achieved by adjusting the relative length of the light-shielding electrode 122 and the pixel electrode 121 in the direction perpendicular to the first substrate 100, so that the technical effect of reducing the vertical crosstalk of the display panel 10 is achieved.
The display panel, the voltage adjusting method of the display panel and the display device provided by the invention are described in detail above. It should be understood that the exemplary embodiments described herein should be considered merely as illustrative, for facilitating understanding of the core concepts of the present invention and not restrictive. Descriptions of features or aspects in each exemplary embodiment should generally be considered as applicable to similar features or aspects in other exemplary embodiments. While the present invention has been described with reference to exemplary embodiments, various changes and modifications may be suggested to one skilled in the art. It is intended that the present invention cover the modifications and variations of this invention provided they come within the spirit and scope of the appended claims and their equivalents and improvements made thereto.
Claims (4)
1. A display panel, comprising: the first substrate, the second substrate and the common electrode compensation module are oppositely arranged;
the first substrate comprises a driving layer and a shading electrode arranged between the driving layer and the second substrate, and the driving layer comprises a plurality of rows of data lines and a plurality of rows of scanning lines;
a common electrode is arranged on one side of the second substrate close to the first substrate;
the common electrode compensation module includes:
the power supply unit is connected with the shading electrode and provided with an output end, and the output end of the power supply unit is used for inputting initial voltage to the shading electrode;
the comparison unit is provided with a first input end, a second input end and an output end, the first input end of the comparison unit is used for inputting a preset common electrode voltage, the second input end of the comparison unit is connected with the common electrode and used for inputting the common electrode feedback voltage, and the output end of the comparison unit is used for comparing the preset common electrode voltage with the common electrode feedback voltage to generate a comparison result and outputting the comparison result generated by the comparison unit;
a regulating unit having a first input terminal, a second input terminal, and an output terminal, the first input terminal of the regulating unit being connected to the output terminal of the power supply unit, the second input end of the adjusting unit is connected with the output end of the comparing unit, used for inputting the comparison result generated by the comparison unit, the output end of the adjusting unit is connected with the shading electrode, used for adjusting the initial voltage according to the comparison result to output a corresponding adjustment voltage to the light-shielding electrode so as to make the actual voltage of the common electrode equal to the preset common electrode voltage, wherein a phase of a regulation voltage of the light shielding electrode is opposite to a phase of a feedback voltage of the common electrode, in the same time sequence, the adjusting voltage of the shading electrode is the same as the feedback voltage of the common electrode in magnitude;
the first substrate further comprises a pixel electrode arranged between the driving layer and the second substrate, the pixel electrode and the shading electrode are arranged on the same layer, and the thickness of the shading electrode is smaller than that of the pixel electrode.
2. The display panel according to claim 1, further comprising a detection unit, wherein two ends of the detection unit are respectively connected to the common electrode and the comparison unit, and the detection unit is configured to detect a feedback voltage on the common electrode and output the detected feedback voltage of the common electrode to the comparison unit.
3. A voltage regulation method of a display panel, the display panel comprising: the first substrate, the second substrate and the common electrode compensation module are oppositely arranged; the first substrate comprises a driving layer and a transparent electrode layer arranged between the driving layer and the second substrate, the driving layer comprises a plurality of rows of data lines and a plurality of rows of scanning lines, and the transparent electrode layer comprises spaced pixel electrodes and light shielding electrodes; a common electrode is arranged on one side of the second substrate close to the first substrate; the common electrode compensation module comprises a power supply unit, a comparison unit and an adjustment unit; the first substrate further comprises a pixel electrode arranged between the driving layer and the second substrate, the pixel electrode and the shading electrode are arranged on the same layer, and the thickness of the shading electrode is smaller than that of the pixel electrode;
the voltage regulation method of the display panel comprises the following steps:
inputting an initial voltage to the light-shielding electrode through the output terminal of the power supply unit connected to the light-shielding electrode;
receiving a preset common electrode voltage through a first input end of a comparison unit, receiving a common electrode feedback voltage through a second input end of the comparison unit connected with the common electrode, and comparing the preset common electrode voltage with the common electrode feedback voltage through an output end of the comparison unit to generate a comparison result;
the initial voltage of the shading electrode is received through the first input end of the adjusting unit connected with the output end of the power supply unit, the comparison result is received through the second input end of the adjusting unit connected with the output end of the comparison unit, and the initial voltage is adjusted according to the comparison result to output corresponding adjusting voltage to the shading electrode, so that the actual voltage of the public electrode is equal to the voltage of the preset public electrode, wherein the adjusting voltage of the shading electrode is opposite to the feedback voltage of the public electrode in phase, and the adjusting voltage of the shading electrode is the same as the feedback voltage of the public electrode in the same time sequence.
4. A display device characterized by comprising the display panel according to any one of claims 1 to 2.
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| CN112885307B true CN112885307B (en) | 2022-07-12 |
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| CN102842280B (en) * | 2012-08-31 | 2016-03-30 | 京东方科技集团股份有限公司 | A kind of common electric voltage compensating circuit, method and liquid crystal indicator |
| KR102140815B1 (en) * | 2013-12-09 | 2020-08-04 | 삼성디스플레이 주식회사 | Liquid crystal display |
| CN104700768B (en) * | 2015-04-03 | 2017-07-28 | 京东方科技集团股份有限公司 | A kind of common electric voltage compensation circuit, its compensation method and display device |
| CN104882104B (en) * | 2015-05-11 | 2017-05-31 | 深圳市华星光电技术有限公司 | A kind of liquid crystal display panel and device |
| 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 |
| CN105632395B (en) * | 2016-02-04 | 2018-07-17 | 京东方科技集团股份有限公司 | A kind of compensation circuit and display device of public electrode voltages |
| CN106297709A (en) * | 2016-09-09 | 2017-01-04 | 合肥鑫晟光电科技有限公司 | Display floater, compensation device, display device and common electrode voltage compensation method |
| CN106875880B (en) * | 2017-04-28 | 2020-08-21 | 合肥京东方光电科技有限公司 | Common voltage compensation circuit, compensation method and display device |
| CN106898326B (en) * | 2017-05-03 | 2019-06-07 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and its common voltage compensation method, device |
| CN107329339B (en) * | 2017-08-14 | 2020-04-07 | 深圳市华星光电技术有限公司 | Array substrate and curved surface liquid crystal display |
| CN108847173B (en) * | 2018-06-29 | 2020-09-29 | 深圳市华星光电半导体显示技术有限公司 | Common voltage feedback compensation circuit and method and flat panel display device |
| CN109633974A (en) * | 2019-02-18 | 2019-04-16 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and preparation method thereof |
| CN111580316B (en) * | 2020-05-19 | 2023-01-24 | 深圳市华星光电半导体显示技术有限公司 | Display panel and electronic device |
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