CN106707640B - Liquid crystal display panel and device - Google Patents

Liquid crystal display panel and device Download PDF

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CN106707640B
CN106707640B CN201611192411.0A CN201611192411A CN106707640B CN 106707640 B CN106707640 B CN 106707640B CN 201611192411 A CN201611192411 A CN 201611192411A CN 106707640 B CN106707640 B CN 106707640B
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data
data line
data lines
voltage
liquid crystal
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CN106707640A (en
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陈帅
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention provides a liquid crystal display panel and a device, wherein the liquid crystal display panel comprises a common electrode, and a common voltage is input; a first data line group including a plurality of first data lines; the first data line is used for inputting a first data voltage; the first data voltage is used for generating a first coupling capacitance between the first data line and the common electrode; a second data line group including a plurality of second data lines; the second data line is used for inputting a second data voltage; the second data voltage is used for generating a second coupling capacitor between the second data line and the common electrode, and the second coupling capacitor and the first coupling capacitor are equal in size and opposite in polarity. The liquid crystal display panel and the device can eliminate crosstalk and improve the display effect.

Description

Liquid crystal display panel and device
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of liquid crystal displays, in particular to a liquid crystal display panel and a device.
[ background of the invention ]
Crosstalk occurs in the liquid crystal panel due to a capacitive coupling effect of the Data line (Data line) and the Common Electrode (Common Electrode), thereby affecting a display effect.
The conventional solution is to adopt a Column Inversion (Column Inversion) or Dot Inversion (Dot Inversion) driving method, that is, two adjacent data lines and a common electrode have opposite capacitive coupling effects, so as to cancel each other, thereby reducing the crosstalk. However, due to the existence of the semiconductor layer between the first metal layer and the second metal layer, there is a difference in the magnitude of the coupling capacitance under the positive frame and the negative frame driving, as shown in fig. 1 and 2, a1 and a2 respectively show schematic diagrams of the capacitive coupling effect between the positive frame and the negative frame before and after inversion, and it is not difficult to see that there is a difference in the magnitude of the coupling capacitance under the positive frame and the negative frame driving, so that there is a large difference in the capacitive coupling effect between two adjacent data lines and the common electrode, and thus crosstalk cannot be effectively eliminated.
Therefore, it is desirable to provide a liquid crystal display panel and a device thereof to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide a liquid crystal display panel and a device, which can eliminate crosstalk and improve the display effect.
In order to solve the above technical problem, the present invention provides a liquid crystal display panel, which includes: a common electrode to which a common voltage is input;
a first data line group including a plurality of first data lines; the first data line is used for inputting a first data voltage; the first data voltage is used for generating a first coupling capacitance between the first data line and the common electrode;
a second data line group including a plurality of second data lines; the second data line is used for inputting a second data voltage; the second data voltage is used for generating a second coupling capacitor between the second data line and the common electrode, and the second coupling capacitor and the first coupling capacitor are equal in size and opposite in polarity.
In the liquid crystal display panel of the invention, the second data voltage is obtained by adjusting a preset data voltage according to the first coupling capacitor.
In the liquid crystal display panel of the present invention, a difference between the preset data voltage and the first data voltage is within a preset range.
In the liquid crystal display panel of the present invention, the polarity of the first data voltage is opposite to the polarity of the second data voltage.
In the liquid crystal display panel of the present invention, the first data lines and the second data lines are alternately arranged.
In the liquid crystal display panel of the invention, when the liquid crystal display panel comprises 2k data lines, the total number of the first data lines in the first data line group is equal to the total number of the second data lines in the second data line group, wherein k is more than or equal to 1.
In the liquid crystal display panel of the invention, when the liquid crystal display panel comprises 2k +1 data lines, the total number of the first data lines in the first data line group is greater than the total number of the second data lines in the second data line group, wherein k is greater than or equal to 1.
In the liquid crystal display panel of the invention, when the liquid crystal display panel comprises 2k +1 data lines, the total number of the first data lines in the first data line group is less than the total number of the second data lines in the second data line group, wherein k is more than or equal to 1.
The present invention also provides a liquid crystal display device, comprising:
a liquid crystal display panel, comprising:
a first data line group including a plurality of first data lines; the first data line is used for inputting a first data voltage; the first data voltage is used for generating a first coupling capacitance between the first data line and the common electrode;
a second data line group including a plurality of second data lines; the second data line is used for inputting a second data voltage; the second data voltage is used for generating a second coupling capacitor between the second data line and the common electrode, and the second coupling capacitor and the first coupling capacitor are equal in size and opposite in polarity.
In the liquid crystal display device of the present invention, the second data voltage is obtained by adjusting a preset data voltage according to the first coupling capacitor.
According to the liquid crystal display panel and the device, the data lines are divided into two groups, and different data voltages are input into each group of data lines, so that the capacitive coupling effect between two adjacent data lines and the common electrode is offset, the crosstalk is eliminated, and the display effect is improved.
[ description of the drawings ]
FIG. 1 is a diagram of coupling capacitors under driving of positive and negative frames in a conventional LCD panel.
FIG. 2 is another schematic diagram of coupling capacitors under driving of positive and negative frames in a conventional LCD panel.
Fig. 3 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the invention.
Fig. 4 is a schematic structural diagram of a first substrate in a liquid crystal display panel according to an embodiment of the invention.
FIG. 5 is a diagram of coupling capacitors under driving of positive and negative frames in an LCD panel according to the present invention.
FIG. 6 is another schematic diagram of the coupling capacitors under the driving of the positive frame and the negative frame in the LCD panel of the present invention.
Fig. 7 is another schematic structural diagram of the first substrate in the lcd panel according to the embodiment of the invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a liquid crystal display panel according to an embodiment of the invention.
As shown in fig. 3, the liquid crystal display panel of the present embodiment includes a first substrate 10, a second substrate 20, and a liquid crystal layer 30. The first substrate 10 and the second substrate 20 are disposed opposite to each other, and the liquid crystal layer 30 is located between the first substrate 10 and the second substrate 20. The second substrate 20 includes a common electrode 21. In one embodiment, the first substrate 10 is an array substrate, and the second substrate 20 is a color filter substrate.
Referring to fig. 4, the first substrate 10 includes a first data line group 100, a second data line group 200, and a plurality of pixels 101.
The first data line group 100 includes three first data lines 11-13; each first data line is used for inputting a first data voltage V1; the first data voltage V1 is used to generate a first coupling capacitance C1 between each first data line and the common electrode 21.
The second data line group 200 includes three second data lines 14-16; each second data line is used for inputting a second data voltage V2; the second data voltage V2 is used to generate a second coupling capacitor C2 between each second data line and the common electrode 21, and the second coupling capacitor C2 and the first coupling capacitor C1 are equal in size and opposite in polarity.
It is understood that the first data voltage V1 and the second data voltage V2 are not equal.
As shown in fig. 5 and 6, b1 and b2 respectively show schematic diagrams of the capacitive coupling effect between the positive frame and the negative frame before and after inversion, and it is easy to see that there is no difference in the magnitude of the coupling capacitance under driving of the positive frame and the negative frame.
Since all the data lines are divided into two data line groups and different data voltages are input into each data line group, the coupling capacitances between the data lines and the common electrodes corresponding to all the pixels with positive polarity and the coupling capacitances between the data lines and the common electrodes corresponding to all the pixels with negative polarity are mutually offset, and thus crosstalk is eliminated. In addition, the display panel can be prevented from flickering, and the display effect is improved.
In one embodiment, the second data voltage V2 is obtained by adjusting a preset data voltage according to the first coupling capacitor C1.
Specifically, when the first Gamma curve calibration is performed, the first data voltage V1 and the initial value V0 of the second data voltage are set to be the same value, and at this time, if the crosstalk does not occur on the display panel, the first data voltage V1 and the initial value V0 of the second data voltage are set completely. The preset data voltage is equal to V0.
If the crosstalk occurs in the lcd panel, the first data voltage V1 is fixed, and the V0 voltage is adjusted until the crosstalk disappears, that is, the coupling capacitance between the data line in the second data line group 200 and the common electrode 21 is equal to the first coupling capacitance between the data line in the first data line group 100 and the common electrode 21, and the adjusted second data voltage is used as the final second data voltage V2.
In one embodiment, to improve the adjustment efficiency, the difference between the preset data voltage V0 and the first data voltage V1 is within a preset range. The difference is an absolute value of a difference between the preset data voltage V0 and the first data voltage V1. The preset range is, for example, a range close to 0.
In one embodiment, to better eliminate the crosstalk phenomenon, the polarities of the first data voltage V1 and the second data voltage V2 are opposite. For example, the polarity of the first data voltage V1 is positive, and the polarity of the second data voltage V2 is negative.
In one embodiment, the first data lines and the second data lines are alternately disposed. For example, the first data line 11 is adjacent to the second data line 14, the second data line 14 is adjacent to the first data line 12, and the rest of the data lines are similar. The first data lines and the second data lines are arranged in a staggered mode, so that coupling capacitance between the data lines and the common electrode can be offset more uniformly, and the display effect is improved.
It is understood that, in an embodiment, the first data line and the second data line may not be arranged in an interlaced manner, for example, the data lines corresponding to the left three columns of pixels are all the first data lines, and the data lines corresponding to the right three columns of pixels are all the second data lines.
In one embodiment, when the LCD panel comprises 2k data lines, k ≧ 1. That is, when the liquid crystal display panel includes even number of data lines, the number of the first data lines is equal to the number of the second data lines, so that the coupling capacitance between the data lines and the common electrode can be more uniformly offset, and the display effect is improved.
It is to be understood that, although the liquid crystal display panel of fig. 4 includes 6 data lines, the present embodiment is not limited thereto. The liquid crystal display panel of the present embodiment may include 2 to 5 data lines or more than 6 data lines.
In an embodiment, when the liquid crystal display panel includes 2k +1 data lines, that is, the liquid crystal display panel includes odd data lines, the total number of the first data lines is greater than the total number of the second data lines.
In an embodiment, when the liquid crystal display panel includes 2k +1 data lines, the total number of the first data lines is less than the total number of the second data lines, where k ≧ 1.
It is to be understood that although the first data line group 100 includes 3 first data lines in fig. 4, the second data line group 200 includes 3 second data lines. However, this embodiment is not limited thereto. The first data line group 100 of this embodiment may also include 1, 2, or more than 3 first data lines. The second data line group 200 of this embodiment may also include 1 or 2 or more than 3 second data lines,
it is understood that, in one embodiment, as shown in fig. 7, the number of the first data lines in the first data line group 100 is 4, and the number of the second data lines in the second data line group 200 is 2. Of course, the division is not limited to the division of fig. 4 and 7.
It is understood that the polarity of the first data voltage V1 input by the first data line may be negative, and the polarity of the second data voltage V2 input by the second data line may also be positive.
According to the liquid crystal display panel and the device, the data lines are divided into two groups, and different data voltages are input into each group of data lines, so that the capacitive coupling effect between two adjacent data lines and the common electrode is offset, the crosstalk is eliminated, and the display effect is improved.
The embodiment of the invention also provides a liquid crystal display device which comprises a backlight module and a liquid crystal display panel, wherein the backlight module is used for providing a light source for the liquid crystal display panel. As shown in fig. 3, the liquid crystal display panel of the present embodiment includes a first substrate 10, a second substrate 20, and a liquid crystal layer 30. The first substrate 10 and the second substrate 20 are disposed opposite to each other, and the liquid crystal layer 30 is located between the first substrate 10 and the second substrate 20. The second substrate 20 includes a common electrode 21. In one embodiment, the first substrate 10 is an array substrate, and the second substrate 20 is a color filter substrate.
Referring to fig. 4, the first substrate 10 includes a first data line group 100, a second data line group 200, and a plurality of pixels 101.
The first data line group 100 includes three first data lines 11-13; each first data line is used for inputting a first data voltage V1; the first data voltage V1 is used to generate a first coupling capacitance C1 between each first data line and the common electrode 21.
The second data line group 200 includes three second data lines 14-16; each second data line is used for inputting a second data voltage V2; the second data voltage V2 is used to generate a second coupling capacitor C2 between each second data line and the common electrode 21, and the second coupling capacitor C2 and the first coupling capacitor C1 are equal in size and opposite in polarity.
It is understood that the first data voltage V1 and the second data voltage V2 are not equal.
As shown in fig. 5 and 6, b1 and b2 respectively show schematic diagrams of the capacitive coupling effect between the positive frame and the negative frame before and after inversion, and it is easy to see that there is no difference in the magnitude of the coupling capacitance under driving of the positive frame and the negative frame.
Since all the data lines are divided into two data line groups and different data voltages are input into each data line group, the coupling capacitances between the data lines and the common electrodes corresponding to all the pixels with positive polarity and the coupling capacitances between the data lines and the common electrodes corresponding to all the pixels with negative polarity are mutually offset, and thus crosstalk is eliminated. In addition, the display panel can be prevented from flickering, and the display effect is improved.
In one embodiment, the second data voltage V2 is obtained by adjusting a preset data voltage according to the first coupling capacitor C1.
Specifically, when the first Gamma curve calibration is performed, the first data voltage V1 and the initial value V0 of the second data voltage are set to be the same value, and at this time, if the crosstalk does not occur on the display panel, the first data voltage V1 and the initial value V0 of the second data voltage are set completely. The preset data voltage is equal to V0.
If the crosstalk occurs in the lcd panel, the first data voltage V1 is fixed, and the V0 voltage is adjusted until the crosstalk disappears, that is, the coupling capacitance between the data line in the second data line group 200 and the common electrode 21 is equal to the first coupling capacitance between the data line in the first data line group 100 and the common electrode 21, and the adjusted second data voltage is used as the final second data voltage V2.
In one embodiment, to improve the adjustment efficiency, the difference between the preset data voltage V0 and the first data voltage V1 is within a preset range. The difference is an absolute value of a difference between the preset data voltage V0 and the first data voltage V1. The preset range is, for example, a range close to 0.
In one embodiment, to better eliminate the crosstalk phenomenon, the polarities of the first data voltage V1 and the second data voltage V2 are opposite. For example, the polarity of the first data voltage V1 is positive, and the polarity of the second data voltage V2 is negative.
In one embodiment, the first data lines and the second data lines are alternately disposed. For example, the first data line 11 is adjacent to the second data line 14, the second data line 14 is adjacent to the first data line 12, and the rest of the data lines are similar. The first data lines and the second data lines are arranged in a staggered mode, so that coupling capacitance between the data lines and the common electrode can be offset more uniformly, and the display effect is improved.
It is understood that, in an embodiment, the first data line and the second data line may not be arranged in an interlaced manner, for example, the data lines corresponding to the left three columns of pixels are all the first data lines, and the data lines corresponding to the right three columns of pixels are all the second data lines.
In one embodiment, when the LCD panel comprises 2k data lines, k ≧ 1. That is, when the liquid crystal display panel includes even number of data lines, the number of the first data lines is equal to the number of the second data lines, so that the coupling capacitance between the data lines and the common electrode can be more uniformly offset, and the display effect is improved.
It is to be understood that, although the liquid crystal display panel of fig. 4 includes 6 data lines, the present embodiment is not limited thereto. The liquid crystal display panel of the present embodiment may include 2 to 5 data lines or more than 6 data lines.
In an embodiment, when the liquid crystal display panel includes 2k +1 data lines, that is, the liquid crystal display panel includes odd data lines, the total number of the first data lines is greater than the total number of the second data lines.
In an embodiment, when the liquid crystal display panel includes 2k +1 data lines, the total number of the first data lines is less than the total number of the second data lines, where k ≧ 1.
It is to be understood that although the first data line group 100 includes 3 first data lines in fig. 4, the second data line group 200 includes 3 second data lines. However, this embodiment is not limited thereto. The first data line group 100 of this embodiment may also include 1, 2, or more than 3 first data lines. The second data line group 200 of this embodiment may also include 1 or 2 or more than 3 second data lines,
it is understood that, in one embodiment, as shown in fig. 7, the number of the first data lines in the first data line group 100 is 4, and the number of the second data lines in the second data line group 200 is 2. Of course, the division is not limited to the division of fig. 4 and 7.
It is understood that the polarity of the first data voltage V1 input by the first data line may be negative, and the polarity of the second data voltage V2 input by the second data line may also be positive.
According to the liquid crystal display panel and the device, the data lines are divided into two groups, and different data voltages are input into each group of data lines, so that the capacitive coupling effect between two adjacent data lines and the common electrode is offset, the crosstalk is eliminated, and the display effect is improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (8)

1. A liquid crystal display panel, comprising:
a common electrode to which a common voltage is input;
a first data line group including a plurality of first data lines; the first data line is used for inputting a first data voltage; the first data voltage is used for generating a first coupling capacitance between the first data line and the common electrode;
a second data line group including a plurality of second data lines; the second data line is used for inputting a second data voltage; the second data voltage is used for generating a second coupling capacitor between the second data line and the common electrode, and the second coupling capacitor and the first coupling capacitor are equal in size and opposite in polarity;
the first data voltage is a fixed value, and the second data voltage is obtained by adjusting a preset data voltage according to the first coupling capacitor.
2. The liquid crystal display panel according to claim 1, wherein a difference between the preset data voltage and the first data voltage is within a preset range.
3. The liquid crystal display panel according to claim 1, wherein a polarity of the first data voltage and a polarity of the second data voltage are opposite.
4. The liquid crystal display panel according to claim 1, wherein the first data lines and the second data lines are alternately arranged.
5. The LCD panel of claim 1, wherein when the LCD panel comprises 2k data lines, the total number of first data lines in the first data line group and the total number of second data lines in the second data line group are equal, wherein k ≧ 1.
6. The LCD panel of claim 1, wherein when the LCD panel comprises 2k +1 data lines, the total number of first data lines in the first data line group is greater than the total number of second data lines in the second data line group, wherein k ≧ 1.
7. The LCD panel of claim 1, wherein when the LCD panel comprises 2k +1 data lines, the total number of first data lines in the first data line group is less than the total number of second data lines in the second data line group, wherein k ≧ 1.
8. A liquid crystal display device, comprising: a liquid crystal display panel, comprising:
a common electrode to which a common voltage is input;
a first data line group including a plurality of first data lines; the first data line is used for inputting a first data voltage; the first data voltage is used for generating a first coupling capacitance between the first data line and the common electrode;
a second data line group including a plurality of second data lines; the second data line is used for inputting a second data voltage; the second data voltage is used for generating a second coupling capacitor between the second data line and the common electrode, and the second coupling capacitor and the first coupling capacitor are equal in size and opposite in polarity;
the first data voltage is a fixed value, and the second data voltage is obtained by adjusting a preset data voltage according to the first coupling capacitor.
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CN110033739B (en) * 2018-01-11 2022-01-18 奇景光电股份有限公司 Method and apparatus for improving horizontal crosstalk of display panel
CN110187576B (en) * 2019-06-24 2022-02-25 上海中航光电子有限公司 Display panel and display device
CN113741106A (en) * 2021-07-30 2021-12-03 北海惠科光电技术有限公司 Array substrate and display panel
CN114913826A (en) * 2022-05-16 2022-08-16 星源电子科技(深圳)有限公司 Manufacturing method of low-crosstalk liquid crystal module
CN115202117B (en) * 2022-07-29 2023-06-16 惠科股份有限公司 Array substrate, display device and driving circuit

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